@article {pmid40630933, year = {2025}, author = {Takács, B and Jaksa, G and Qorri, E and Gyuris, Z and Pintér, L and Haracska, L}, title = {Advancing metagenomic classification with NABAS+: a novel alignment-based approach.}, journal = {NAR genomics and bioinformatics}, volume = {7}, number = {3}, pages = {lqaf092}, pmid = {40630933}, issn = {2631-9268}, mesh = {Humans ; *Metagenomics/methods ; Algorithms ; *Software ; *Sequence Alignment/methods ; *Metagenome ; Microbiota/genetics ; }, abstract = {Microbiome research has expanded rapidly in the last decade due to advances in sequencing technology, resulting in larger and more complex data. This has also led to the development of a plethora of metagenomic classifiers applying different algorithmic principles to classify microorganisms. However, accurate metagenomic classification remains challenging due to false positives and the need for dataset-specific tuning, limiting the comparability of distinct studies and clinical use. In this study, we demonstrate the discrepancy between current, commonly used classifiers and propose a novel classifier, NABAS+ (Novel Alignment-based Biome Analyzing Software+). NABAS+ uses BWA (Burrows-Wheeler aligner) alignment with strict RefSeq curation to ensure one reliable genome per species and filters for genomes with only high-quality reads for precise species-level identification from Illumina shotgun data. The performance of our algorithm and three commonly used classifiers was evaluated on in silico datasets modelling human gastrooral communities, as well as on deeply sequenced microbial community standards. Additionally, we illustrated the usefulness of NABAS+ in detecting pathogens in real-world clinical data. Our results show that NABAS+, due to its extensive alignment process, is superior in accuracy and sensitivity compared to leading microbiome classifiers, particularly in reducing false positives in deep-sequenced microbial samples, making it suitable for clinical diagnosis.}, }
@article {pmid40628728, year = {2025}, author = {Arp, G and Jiang, AK and Dufault-Thompson, K and Levy, S and Zhong, A and Wassan, JT and Grant, MR and Li, Y and Hall, B and Jiang, X}, title = {Identification of gut bacteria reductases that biotransform steroid hormones.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {6285}, pmid = {40628728}, issn = {2041-1723}, mesh = {*Gastrointestinal Microbiome/physiology/genetics ; Humans ; Phylogeny ; Male ; Female ; *Oxidoreductases/metabolism/genetics ; *Bacteria/enzymology/genetics/classification ; *Steroids/metabolism ; Biotransformation ; Pregnenolone/metabolism ; *Bacterial Proteins/metabolism/genetics ; }, abstract = {The metabolism of steroid hormones by the gut microbiome is increasingly recognized as a key factor in human health; however, the specific enzymes mediating these transformations remain largely unidentified. In this study, we identify Δ[4]-3-ketosteroid 5β-reductase, 3β-hydroxysteroid dehydrogenase/Δ[5-4] isomerase, and Δ[6]-3-ketosteroid reductase enzyme families encoded by common human gut bacteria. Through phylogenetic reconstruction and mutagenesis, we show that 5β-reductase evolved to specialize in converting both natural and synthetic 3-ketosteroid hormones into their 5β-reduced derivatives, while Δ[6]-3-ketosteroid reductase adapted to produce Δ[6]-reduced derivatives. We also find that the novel 3β-hydroxysteroid dehydrogenase/Δ[5-4] isomerase is fused with 5β-reductase in multiple species, streamlining the conversion of pregnenolone, a 3β-hydroxy-5-ene and steroid hormone precursor, into epipregnanolone. Through metagenomic analysis, we reveal that these enzymes are prevalent in healthy populations and enriched in females compared to males. These findings lay the groundwork for mechanistic investigations into how microbial steroid metabolism modulates host hormonal physiology.}, }
@article {pmid40570246, year = {2025}, author = {Ma, C and Bao, Y and Hereid, S and Zhang, H and Bai, X and Bai, Q and Zhao, L and Zhang, X and Lian, H and Dai, L and Bao, X and Bao, L}, title = {Mechanistic Elucidation of Tricholoma mongolicum Polysaccharides in Treating MAFLD via Regulation of the Gut Microbiota-Metabolite-Ferroptosis Axis: A Multi-Omics Perspective.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {27}, pages = {17040-17056}, doi = {10.1021/acs.jafc.5c05877}, pmid = {40570246}, issn = {1520-5118}, mesh = {*Gastrointestinal Microbiome/drug effects ; *Polysaccharides/administration & dosage/chemistry ; Animals ; Mice ; Male ; Humans ; *Tricholoma/chemistry ; Bacteria/classification/genetics/isolation & purification/metabolism/drug effects ; Mice, Inbred C57BL ; Liver/metabolism/drug effects ; Iron/metabolism ; *Non-alcoholic Fatty Liver Disease/drug therapy/metabolism/microbiology/genetics ; *Plant Extracts/administration & dosage/chemistry ; *Fatty Liver/drug therapy/metabolism/microbiology/genetics ; Multiomics ; }, abstract = {This study aimed to elucidate the modulatory effects and underlying molecular mechanisms of Tricholoma mongolicum polysaccharide (TMP) in the context of metabolic dysfunction-associated fatty liver disease (MAFLD). High-performance gel permeation chromatography (HPGPC) analysis indicated a bimodal molecular weight distribution. Monosaccharide composition profiling revealed a predominance of glucose and galactose among other constituents. Scanning electron microscopy (SEM) illustrated a porous, aggregated colloidal microstructure. In a model of MAFLD, TMP intervention significantly attenuated serum levels of TC, TG, and AST, ALT, accompanied by notable histological improvements, including reduced hepatic steatosis and inflammatory cell infiltration. Metagenomic analysis demonstrated that TMP substantially enhanced gut microbial α-diversity, restructured microbial community composition, decreased the Firmicutes/Bacteroidetes ratio, enriched SCFAs-producing genera, and suppressed the excessive proliferation of pro-inflammatory bacterial genera. Integrated proteomic and lipidomic analyses revealed that TMP inhibited hepatic immune-inflammatory responses and ferroptosis pathways, enhanced pathways associated with metabolic homeostasis. Furthermore, TMP modulated hepatic iron metabolism by upregulating the Nrf2/GPx4 antioxidant axis and FPN1 while downregulating TFR1, thereby alleviating oxidative stress and iron overload. These findings demonstrate that TMP exerts therapeutic efficacy through a bidirectional gut-liver regulatory mechanism involving microbial modulation, ferroptosis inhibition, metabolic reprogramming, and activation of antioxidant defenses. This research provides novel insights and molecular targets for the development of natural polysaccharide-based interventions for MAFLD.}, }
@article {pmid40556381, year = {2025}, author = {Zhao, S and Xu, Q and Li, M and Chen, J and Francis, F and Dai, X and Tan, J and Kong, Z}, title = {Exploring the Impact of Dinotefuran Residue on Microbial Community and Flavor Generation in Huangjiu Fermentation.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {27}, pages = {17219-17232}, doi = {10.1021/acs.jafc.5c02308}, pmid = {40556381}, issn = {1520-5118}, mesh = {Fermentation ; *Flavoring Agents/metabolism/chemistry ; *Guanidines/analysis/metabolism ; *Bacteria/genetics/isolation & purification/classification/metabolism ; Microbiota/drug effects ; Volatile Organic Compounds/chemistry/metabolism ; *Nitro Compounds/analysis/metabolism ; Gas Chromatography-Mass Spectrometry ; *Neonicotinoids/analysis ; *Pesticide Residues/analysis ; Taste ; Odorants/analysis ; *Fermented Foods/microbiology/analysis ; Metagenomics ; *Brassica/microbiology/chemistry ; }, abstract = {Pesticide residues create food safety hazards while negatively affecting the quality of fermented foods, but the mechanisms of the deterioration response have been a mystery. In this study, headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS) and metagenomics sequencing analyses were employed to investigate the effect of dinotefuran residue on the aroma profile and microbial community of Huangjiu. The presence of dinotefuran led to a reduction in the overall concentration of volatile compounds, and some floral, fruity, and sweet aromas such as piperitenol, citronellyl isobutyrate, and trans-2-decenal were no longer detected. Meanwhile, the levels of certain acidic volatiles, including formic acid, propionic acid, and heptanoic acid, increased and contributed to off-flavors. Dinotefuran affected the Huangjiu flavor by modifying the abundance and structure of key genera such as Saccharomyces, Lactococcus, and Cyberlindnera. These changes were associated with disturbances in 16 KEGG tertiary metabolic pathways, including glycolysis, pyruvate metabolism, and amino acid biosynthesis. These results provided some reference for further studies on how pesticide residues affect the flavor and microbial characteristics of traditional fermented beverages like Huangjiu.}, }
@article {pmid40454811, year = {2025}, author = {Millard, SA and Vendrov, KC and Young, VB and Seekatz, AM}, title = {Host origin of microbiota drives functional recovery and Clostridioides difficile clearance in mice.}, journal = {mBio}, volume = {16}, number = {7}, pages = {e0110825}, doi = {10.1128/mbio.01108-25}, pmid = {40454811}, issn = {2150-7511}, support = {P20GM146584, P20GM139769/NH/NIH HHS/United States ; K01-DK111794/NH/NIH HHS/United States ; AI124255, AI090871/NH/NIH HHS/United States ; }, mesh = {Animals ; *Clostridium Infections/therapy/microbiology ; *Fecal Microbiota Transplantation ; Mice ; *Clostridioides difficile/physiology ; *Gastrointestinal Microbiome ; Humans ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Disease Models, Animal ; Mice, Inbred C57BL ; Female ; Male ; Metagenomics ; Metabolomics ; }, abstract = {UNLABELLED: Colonization resistance provided by the gut microbiota is essential for resisting both initial Clostridioides difficile infection (CDI) and potential recurrent infection (rCDI). Although fecal microbiota transplantation (FMT) has been successful in treating rCDI by restoring microbial composition and function, mechanisms underlying the efficacy of standardized stool-derived products remain poorly understood. Using a combination of 16S rRNA gene-based and metagenomic sequencing alongside metabolomics, we investigated microbiome recovery following FMT from human and murine donor sources in a mouse model of rCDI. We found that a human-derived microbiota was less effective in clearing C. difficile compared to a mouse-derived microbiota, despite recovery of taxonomic diversity, compositional changes, and bacterial functions typically associated with clearance. Metabolomic analysis revealed deficits in secondary metabolites compared to those that received murine FMT, suggesting a functional remodeling between human microbes in their new host environment. Collectively, our data revealed additional environmental, ecological, or host factors to consider in FMT-based recovery from rCDI.<br><br>IMPORTANCE: Clostridioides difficile is a significant healthcare-associated pathogen, with recurrent infections presenting a major treatment challenge due to further disruption of the microbiota after antibiotic administration. Despite the success of fecal microbiota transplantation (FMT) for the treatment of recurrent infection, the mechanisms mediating its efficacy remain underexplored. This study reveals that the effectiveness of FMT may be compromised by a mismatch between donor microbes and the recipient environment, leading to deficits in key microbial metabolites. These findings highlight additional factors to consider when assessing the efficacy of microbial-based therapeutics for C. difficile infection (CDI) and other conditions.}, }
@article {pmid40285962, year = {2025}, author = {Liao, J and Wei, JH and Liu, J and Ren, L and Zang, N and Liu, E}, title = {Respiratory virome in hospitalized children and analysis of its correlation with disease severity.}, journal = {European journal of clinical microbiology &amp; infectious diseases : official publication of the European Society of Clinical Microbiology}, volume = {44}, number = {7}, pages = {1643-1657}, pmid = {40285962}, issn = {1435-4373}, support = {Grant No. 82341111//The National Natural Science Foundation of China Special Project/ ; }, mesh = {Humans ; Male ; Female ; Child, Preschool ; Infant ; Child ; *Virome ; *Respiratory Tract Infections/virology/epidemiology ; Severity of Illness Index ; Bronchoalveolar Lavage Fluid/virology ; *Viruses/genetics/classification/isolation &amp; purification ; Infant, Newborn ; Child, Hospitalized ; Sputum/virology ; High-Throughput Nucleotide Sequencing ; Adolescent ; *Virus Diseases/virology/epidemiology ; Metagenomics ; Hospitalization ; China/epidemiology ; }, abstract = {PURPOSE: To investigate the composition of respiratory viromes and their association with disease severity among hospitalized pediatric patients.<br><br>METHODS: Clinical data and metagenomic next-generation sequencing (mNGS) results were collected from pediatric patients hospitalized at the Children's Hospital of Chongqing Medical University between January 2022 and September 2023. The analyzed specimens included sputum and bronchoalveolar lavage fluid (BALF).<br><br>RESULTS: The study included 229 patients (65.07% male, median age 3 years) with 25 sputum and 204 BALF samples, of whom 40.17% met the WHO criteria for severe acute respiratory infection (SARI). Herpesviruses were detected in 166 cases (72.49%), including 85 cases of cytomegalovirus (CMV), 64 cases of Epstein-Barr virus (EBV), 34 cases of human herpesvirus-7 (HHV-7), 12 cases of human herpesvirus-6 (HHV-6), and 6 cases of herpes simplex virus type 1 (HSV-1). Additionally, 53 cases of torque teno virus (TTV) and 7 cases of torque teno mini virus (TLMV) were detected. CMV prevalence was highest in neonates, while EBV peaked in the 3-6 year group (37.78%). HSV-1 and HHV-6 were predominantly identified in severe infections.<br><br>CONCLUSION: Herpesviruses, particularly CMV and EBV, were the most frequently detected viruses, followed by anelloviruses. The age-specific viral distribution patterns provide novel epidemiological perspectives for understanding pediatric respiratory pathogenesis, though their clinical significance requires validation through mechanistic studies.<br><br>CLINICAL TRIAL NUMBER: Not applicable.}, }
@article {pmid40625831, year = {2025}, author = {Han, Y and Ding, PH}, title = {Advancing periodontitis microbiome research: integrating design, analysis, and technology.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1616250}, pmid = {40625831}, issn = {2235-2988}, mesh = {Humans ; *Periodontitis/microbiology ; *Microbiota ; Biofilms/growth &amp; development ; Gingiva/microbiology ; Bacteria/genetics/classification ; }, abstract = {Periodontitis, a chronic inflammatory disease affecting 20%-50% of adults worldwide, is driven by polymicrobial synergy and dysbiosis. Despite numerous studies on the oral microbiota in periodontitis, significant heterogeneity exists between findings, posing challenges for treatment strategies. To understand the sources of this variability and establish standardized protocols, we reviewed the literature to identify potential factors contributing to these discrepancies. We found most studies focus on microbial communities in periodontal pockets, with fewer investigating microbial composition within gingival tissue. Research indicates that bacterial communities in gingival tissue exist as biofilms, potentially serving as reservoirs for persistent infection. Therefore, further exploration of the microbiome within periodontal tissues is needed, which may offer new insights for treatment strategies. Metatranscriptomics provides valuable insights into gene expression patterns of the oral microbiota, enabling the exploration of microbial activity at a functional level. Previous studies revealed that most upregulated virulence factors in periodontitis originate from species not traditionally considered major periodontal pathogens. However, current studies have not fully identified or revealed the functional changes in key symbiotic microbes in periodontitis. We reviewed the analytical paradigms of metatranscriptomics and found that current analysis is largely limited to assessing functional changes in known periodontal pathogens, highlighting the need for a functional-driven approach. Beyond the limitations of current analytical paradigms, the metatranscriptomics also has inherent constraints. We suggested integrating emerging high-throughput microbial sequencing technologies with functional-driven analytical strategies to provide a more comprehensive and higher-resolution insight for microbiome reconstruction in periodontitis.}, }
@article {pmid40624949, year = {2025}, author = {Wu, M and Zhang, T and Han, S and Huan, S and Jiang, Y and Wang, Y and Cai, Z and Zhou, J}, title = {Structure and Function Features of Abundant and Rare Prokaryotic Communities Along Nearshore to Offshore Transitions.}, journal = {Environmental microbiology}, volume = {27}, number = {7}, pages = {e70144}, doi = {10.1111/1462-2920.70144}, pmid = {40624949}, issn = {1462-2920}, support = {42476137//National Natural Science Foundation of China/ ; KCXFZ20230731093402005//Shenzhen Science and Technology Program of Shenzhen Science and Technology Innovation Bureau/ ; SGDX20220530111204028//Shenzhen Science and Technology Program of Shenzhen Science and Technology Innovation Bureau/ ; RCJC20200714114433069//Shenzhen Science and Technology Program of Shenzhen Science and Technology Innovation Bureau/ ; ZDSYS20230626091459009//Shenzhen Science and Technology Program of Shenzhen Science and Technology Innovation Bureau/ ; 2023KCXTD052//Innovation Team Project for Guangdong's Universities/ ; 2025A1515010643//Natural Science Foundation of Guangdong Province/ ; 2025A1515010519//Natural Science Foundation of Guangdong Province/ ; }, mesh = {Biodiversity ; *Seawater/microbiology ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Phylogeny ; *Microbiota ; Metagenome ; Metagenomics ; *Archaea/genetics/classification/isolation &amp; purification ; }, abstract = {Abundant and rare taxa are crucial members of the marine microbial community. However, their biodiversity, assembly mechanisms, functional characteristics and ecological response strategies remain poorly understood. In this study, 16S rRNA and metagenomic sequencing were carried out to reveal the structural and functional features of abundant and rare taxa across the transition from nearshore to offshore. The results showed that the biodiversity of both abundant and rare taxa decreased with increasing distance from shore, with rare taxa exhibiting relatively higher diversity indices than abundant ones. Neutral model analysis revealed that the assembly process gradually changed from deterministic to stochastic from nearshore to offshore among abundant taxa. In contrast, among rare taxa, a stochastic process dominated nearshore, whereas a deterministic process was predominant in the offshore environment. Meanwhile, the proportion of variance that could be explained by environmental factors was relatively higher among abundant communities than among rare ones. A co-occurrence network analysis indicated that rare communities displayed greater complexity and a higher degree of modularity than abundant communities. Functionally, abundant communities tended to favour an r-strategy, whereas rare communities leaned towards a K-strategy. Our results strengthen the understanding of the ecological mechanisms controlling microbial community patterns along coastal-to-open water transitions.}, }
@article {pmid40624695, year = {2025}, author = {Li, Q and Huang, J and Zhou, Y and Wu, Q and Zhou, J and He, F and He, L and Shi, Y and Guo, C and Dai, J}, title = {Virome profiling of Aedes albopictus across urban ecosystems in Guangdong reveals sex-specific diversity.}, journal = {Parasites &amp; vectors}, volume = {18}, number = {1}, pages = {264}, pmid = {40624695}, issn = {1756-3305}, support = {2024HK037//Scientific Research Project of General Administration of Customs/ ; 2024M760629//China Postdoctoral Science Foundation/ ; 2022YFC2302700//National Key Research and Development Program of China/ ; }, mesh = {Animals ; *Aedes/virology ; *Virome/genetics ; Female ; Male ; China ; *Mosquito Vectors/virology ; Phylogeny ; Ecosystem ; Metagenomics ; Cities ; Sex Factors ; Arboviruses/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: Aedes albopictus mosquitoes are key vectors for arboviruses such as Dengue virus, Zika virus, and Chikungunya virus, posing significant global public health risks. Guangdong Province, a densely populated subtropical region in southern China, has experienced recurrent outbreaks of mosquito-borne diseases. However, sex- and geography-specific virome profiles of Aedes albopictus populations in this area remain uncharacterized, limiting the development of targeted surveillance strategies and precise risk assessment.<br><br>METHODS: We performed a metagenomic analysis of 1269 adult Aedes albopictus collected from five cities across Guangdong Province during autumn 2021. Mosquito pools underwent viral particle enrichment followed by DNA and RNA sequencing. Bioinformatic analyses were employed to characterize viral communities, evaluate alpha/beta diversity, and conduct phylogenetic reconstruction.<br><br>RESULTS: A comparative analysis of virome profiles in male and female Aedes albopictus across five regions of Guangdong Province (Chaozhou, Guangzhou, Shaoguan, Shenzhen, Zhanjiang) revealed significant viral distribution patterns influenced by both sex and geographic location. Female mosquitoes predominantly hosted vertebrate-associated arboviruses, including Flavivirus, consistent with their blood-feeding behavior. RNA virome composition showed significant sex-specific clustering (permutational multivariate analysis of variance, PERMANOVA, P&#x2009;=&#x2009;0.008), with coastal cities (Shenzhen, Zhanjiang) being dominated by RNA viruses, whereas inland areas (Shaoguan) exhibited a predominance of DNA viruses. DNA virome profiles displayed divergence between sexes but marked regional variation. Guangzhou emerged as an outlier, exhibiting exceptional bacteriophage diversity distinct from other regions. Phylogenetic analysis identified zoonotic pathogens with signatures of cross-species transmission and region-specific evolutionary adaptation. These findings highlight the interplay between mosquito ecology, geographic factors, and viral evolution in shaping virome diversity.<br><br>CONCLUSIONS: This study presents the inaugural comparative analysis of DNA/RNA viromes in Aedes albopictus populations across Guangdong Province, revealing distinct sex-specific and geographic patterns in viral composition. The identification of vertebrate-associated viruses in female mosquitoes reinforces their epidemiological significance as arboviral vectors, while male-specific environmental viral signatures suggest potential pathways for ecological spillover. Coastal-inland and urban-rural disparities in viral communities emphasize the need for regionally tailored surveillance. These findings provide essential baseline virome data for forecasting emerging arboviral threats and informing strategies to mitigate zoonotic spillover in subtropical urban ecosystems.}, }
@article {pmid40624638, year = {2025}, author = {Yan, X and Lin, X and Wu, J and Zheng, L and Liu, Y and Wu, F and Lin, Y and Lu, Y and Huang, C and Shen, B and Liu, H and Huang, R and Hou, F and Zhou, Q and Song, M and Liu, K and Zhu, F and Li, S and Lin, Y and Wang, W and Li, P and Liao, W and Zhi, F}, title = {Mitigation of chemotherapy-induced gut dysbiosis and diarrhea by supplementation with heat-killed Bacteroides fragilis.}, journal = {BMC medicine}, volume = {23}, number = {1}, pages = {408}, pmid = {40624638}, issn = {1741-7015}, support = {Y20190159//Study on the Mechanism of FUT7 regulating CD15s+eTreg cells in the Pathogenesis of Ulcerative Colitis/ ; NO.2024B03J1282//Key Technology Project in Guangzhou/ ; NO. 201809010014//Innovation Leading Team Project in Guangzhou/ ; }, mesh = {Animals ; *Dysbiosis/chemically induced/therapy/microbiology ; Male ; *Gastrointestinal Microbiome/drug effects ; Humans ; *Diarrhea/chemically induced/microbiology/therapy ; Mice ; *Bacteroides fragilis ; Mice, Inbred C57BL ; *Probiotics/therapeutic use ; Mice, Inbred BALB C ; *Antineoplastic Agents/adverse effects ; Middle Aged ; Fluorouracil/adverse effects ; Feces/microbiology ; Female ; Aged ; }, abstract = {BACKGROUND: The role of gut microbial dysbiosis in chemotherapy-induced diarrhea (CID) pathogenesis remains unclear in humans. This study investigates gut microbiota alterations in CID patients and evaluates the therapeutic potential of probiotic supplementation.<br><br>METHODS: To establish a paired cohort for longitudinal comparison and minimize confounding factors in assessing CID-related microbiota changes, strict inclusion/exclusion criteria were applied to gastrointestinal cancer patients. Fecal samples from eligible participants underwent shotgun metagenomic sequencing to comprehensively profile the gut microbiome composition and function. To evaluate probiotic efficacy and mechanisms, we utilized 6-8-week-old male BALB/c and C57BL/6 mice in established 5-FU- or CPT-11-induced CID models. Probiotic efficacy was assessed using primary (diarrhea severity) and secondary endpoints (body weight change, intestinal permeability). Mechanistic studies were conducted in murine models, complemented by IEC-6 cells and intestinal organoid experiments to elucidate microbiota-host interactions.<br><br>RESULTS: Analysis of paired fecal samples (pre- and post-chemotherapy) from 30 gastrointestinal cancer patients (n&#x2009;=&#x2009;60) revealed chemotherapy-induced reduction of Bacteroides fragilis (B. f) via metagenomics sequencing, with baseline B. f relative abundance negatively correlating with CID severity (r&#x2009;=&#x2009;&#x2009;-&#x2009;0.93, p&#x2009;=&#x2009;3.1e&#x2009;-&#x2009;12). Building on these clinical observations, in 5-FU/CPT-11-induced CID murine models, oral gavage of heat-killed B. f (hk-B. f) outperformed live bacteria in diarrhea alleviation. Mechanistically, B. f-derived succinate exacerbated diarrhea, while its capsular polysaccharide (PSA) ameliorated mice diarrhea. This discovery explains the discrepant therapeutic effect between hk-B.&#xa0;f and live B.&#xa0;f. Fluorescence tracing confirmed hk-B. f transiently localized to the upper gastrointestinal tract without extraintestinal colonization. hk-B. f preserved epithelial integrity, mitochondrial function, and intestinal organoid development (higher budding count and larger organoid surface area). Moreover, hk-B.&#xa0;f upregulated the expression of BCL2 and downregulated the expression of BAX. Shifting the balance between BCL2 and BAX alleviates intestinal epithelial apoptosis. Caspase-3 inhibition or BCL2 silencing abrogated hk-B. f's anti-apoptotic effects in IEC-6 cells.<br><br>CONCLUSIONS: Pathological process of CID can be partially explained by compositional alterations in the gut microbiota. Supplementation with hk-B.&#xa0;f reduces 5-FU-stimulated epithelial injury through mitochondrial apoptotic pathway in CID murine models. These preclinical findings suggest hk-B.&#xa0;f merits further investigation as a potential strategy for improving CID, pending clinical validation.}, }
@article {pmid40624612, year = {2025}, author = {De, T and Ma, T and Wang, W and An, X and Liu, D and Yin, H and Wang, Q and Zhao, T and Wang, H}, title = {Intestinal microbiota in adults with cholangiocarcinoma identifies the dysregulated Blautia species and bile acid metabolic pathways.}, journal = {BMC gastroenterology}, volume = {25}, number = {1}, pages = {506}, pmid = {40624612}, issn = {1471-230X}, support = {XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; XZ2024033//Ningxia Medical University Institutional Scientific Research Fund/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2022BSB03112//the Ningxia Gut Homeostasis and Chronic Disease Prevention and Treatment Scientific and Technological Innovation Team, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; 2023GKLRLX17//Program of Ningxia Science and Technology Leading Talent, China/ ; }, mesh = {Humans ; *Cholangiocarcinoma/microbiology/metabolism ; *Gastrointestinal Microbiome ; *Bile Duct Neoplasms/microbiology/metabolism ; *Bile Acids and Salts/metabolism ; Male ; Middle Aged ; Female ; Metabolic Networks and Pathways ; *Dysbiosis/microbiology ; *Clostridiales/genetics/isolation &amp; purification ; Aged ; Case-Control Studies ; Adult ; Feces/microbiology ; }, abstract = {BACKGROUND: Cholangiocarcinoma (CCA) represents a significant global health concern. The gut and bile microbiota, which can influence the gut-liver axis and disease progression, have not been thoroughly characterized in CCA patients.<br><br>METHODS: We selected two clinical centers at our hospital and collected stool samples from CCA patients and healthy controls (HC). These samples underwent whole-genome metagenomic shotgun sequencing, followed by analysis using both marker gene-based and assembly-based methods. Additionally, KEGG pathway enrichment was performed using the cholangiocarcinoma (CHOL) RNA-seq samples.<br><br>RESULTS: Our results revealed distinct dysbiosis of the gut microbiota in our regional CCA patients. The results revealed greater heterogeneity in the gut microbiome of CCA patients compared to HC samples. We found Blautia species to be significantly less abundant in CCA samples, and can distinguish CCA patients from HC. Blautia can also play a role in influencing the modification of secondary bile acids. Additionally, down-regulation of arachidonic acid and linoleic acid metabolism was observed in the tumor tissues of CHOL patients. In summary, the results revealed significant heterogeneity difference in the gut microbiome of CCA patients compared to HC samples, and detected the specifically decreased Blautia species in CCA patients, suggesting that Blautia may influence bile acid metabolic pathways. Further investigation is warranted to explore Blautia as a potential biomarker for CCA.}, }
@article {pmid40624564, year = {2025}, author = {Zhu, J and Jiang, MZ and Chen, X and Li, M and Wang, YL and Liu, C and Liu, SJ and Chen, WH}, title = {Systematic pairwise co-cultures uncover predominant negative interactions among human gut bacteria.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {161}, pmid = {40624564}, issn = {2049-2618}, support = {2022YFA1304100//Ministry of Science and Technology of the People's Republic of China/ ; 2022YFA1304100//Ministry of Science and Technology of the People's Republic of China/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Bacteria/classification/isolation &amp; purification/genetics/growth &amp; development/metabolism ; *Microbial Interactions ; Coculture Techniques ; Metagenome ; Healthy Volunteers ; Feces/microbiology ; China ; }, abstract = {BACKGROUND: Understanding pairwise bacterial interactions in the human gut is crucial for deciphering the complex networks of bacterial interactions and their contributions to host health. However, there is a lack of large-scale experiments focusing on bacterial interactions within the human gut microbiome.<br><br>METHODS: We investigated the pairwise interactions of 113 bacterial strains isolated from healthy Chinese volunteers, selected for their high abundance and functional representation of the human gut microbiome. Using mGAM agar plates, a rich medium designed to maintain community structure, we established the "PairInteraX" dataset, which includes 3233 pair combinations of culturable human gut bacteria. This dataset was analyzed to identify interaction patterns and the key factors influencing these patterns.<br><br>RESULTS: Our analysis revealed that negative interactions were predominant among the bacteria in the PairInteraX dataset. When combined with in vivo gut metagenome datasets, we noted a diminishing mutualism and an increasing competition as microbial abundances increased; consequently, the maintenance of community diversity requires the participation of various types of interactions, especially the negative interactions. We also identified key factors influencing these interaction patterns including metabolic capacity and motility.<br><br>CONCLUSIONS: This study provides a comprehensive overview of pairwise bacterial interactions within the human gut microbiome, revealing a dominance of negative interactions. Besides, metabolic capacity and motility were identified as the key factors to influence the pairwise interaction patterns. This large-scale dataset and analysis offer valuable insights for further research on microbial community dynamics and their implications for host health. Video Abstract.}, }
@article {pmid40624535, year = {2025}, author = {Zhao, Y and Niu, X and Zhang, Y and Zhao, L and Zhang, L and He, J and Zhang, Q and Mao, Y and Wang, F and Zhao, X and Wang, R}, title = {Impact of supplementing Limosilactobacillus fermentum MN-LF23 on the eradication of Helicobacter pylori with 14-day standard quadruple therapy: a randomized, double-blind, placebo-controlled trial.}, journal = {Nutrition journal}, volume = {24}, number = {1}, pages = {106}, pmid = {40624535}, issn = {1475-2891}, support = {2022YFF1100100//National Key Research and Development Program of China/ ; 2022YFF1100100//National Key Research and Development Program of China/ ; 2022YFF1100100//National Key Research and Development Program of China/ ; }, mesh = {Humans ; *Probiotics/administration &amp; dosage/therapeutic use ; Male ; Female ; *Helicobacter pylori/drug effects ; *Helicobacter Infections/drug therapy/microbiology/therapy ; Double-Blind Method ; Middle Aged ; Adult ; *Limosilactobacillus fermentum ; Drug Therapy, Combination ; Anti-Bacterial Agents/therapeutic use/administration &amp; dosage ; Feces/microbiology ; Treatment Outcome ; Gastrointestinal Microbiome ; Dietary Supplements ; Dyspepsia ; }, abstract = {BACKGROUND: The effect of probiotics on Helicobacter pylori (Hp) infection demonstrates considerable heterogeneity. This study aims to elucidate the role of Limosilactobacillus fermentum MN-LF23 (MN-LF23) in Hp-infected populations.<br><br>METHODS: A total of 94 adult patients with confirmed Hp infection were enrolled in this study and randomly allocated to the placebo or MN-LF23 group. Patients initially received either placebo or probiotics along with standard quadruple therapy for 2 weeks, followed by continued administration of either placebo or probiotics for an additional 4 weeks. The eradication of Hp, serum levels of inflammatory factors, and alterations in gastrointestinal symptoms were assessed at weeks 0, 2, and 6, while fecal samples were collected for metagenomic sequencing.<br><br>RESULTS: The results showed no significant difference (P&#x2009;=&#x2009;1) in the eradication rate between the placebo group (85.11%) and the probiotic group (82.98%). Following treatment, the incidence of constipation, dyspepsia, and Gastrointestinal Symptom Rating Scale (GSRS) scores in the probiotic group were markedly lower (P&#x2009;<&#x2009;0.05) compared to those observed in the placebo group. Throughout the treatment process, there were no significant differences in TNF-&#x3b1; and IL-1&#x3b2; levels between the two groups. Compared to the placebo group, the probiotic group exhibited a significant increase in beneficial bacteria such as Limosilactobacillus fermentum, Lactiplantibacillus plantarum, Bifidobacterium longum, Coprococcus caltus, and Clostridium butyricum.<br><br>CONCLUSION: MN-LF23 supplementation did not improve the eradication rate of standard quadruple therapy. However, it significantly reduced the overall GSRS score, improved digestive and constipation symptoms, and promoted the proliferation of beneficial bacteria in the intestine.}, }
@article {pmid40624250, year = {2025}, author = {Fukuda, T and Takagaki, M and Kaimori, J and Motooka, D and Nakamura, S and Kawabata, S and Nakamura, H and Ozaki, T and Nakagawa, R and Matsumura, T and Teranishi, K and Yamazaki, H and Isaka, Y and Kishima, H}, title = {Differences in gut microbiome between autosomal dominant polycystic kidney disease with and without intracranial aneurysms.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {24204}, pmid = {40624250}, issn = {2045-2322}, support = {22K09282//Japan Society for the Promotion of Science/ ; 21K09072//Japan Society for the Promotion of Science/ ; }, mesh = {Humans ; *Polycystic Kidney, Autosomal Dominant/microbiology/complications ; *Gastrointestinal Microbiome ; *Intracranial Aneurysm/microbiology/complications ; Female ; Male ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; Adult ; Feces/microbiology ; Aged ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder characterized by cyst formation in the kidneys, and is associated with an elevated risk of intracranial aneurysms (IAs). Although a family history is a recognized risk factor for IAs in patients with ADPKD, emerging research suggests that gut microbiome composition may influence IA development. We investigated the relationship between the gut microbiome and the development of IA in patients with ADPKD. We recruited patients with ADPKD with (IA group) and without (non-IA group) IA from Osaka University between October 2021 and December 2023. Fecal samples were analyzed using 16S rRNA sequencing. Data were processed using the QIIME 2 pipeline to determine microbial diversity and composition. We included 60 patients: 26 in the IA and 34 in the non-IA groups. There were significant differences in microbial beta diversity between the groups. The IA group had higher abundances of Eubacterium siraeum group, Oscillibacter, Fournierella, Negativibacillus, Colidextribacter, and Adlercreutzia. The non-IA group had higher abundances of Bifidobacterium, Megamonas, Acidaminococcus, Megasphaera, and Merdibacter. There was a significant association between the gut microbiome composition and the presence of IAs in patients with ADPKD. Specific bacterial taxa were differentially abundant between patients with ADPKD with and without IAs, suggesting a potential role of the gut microbiome in the pathogenesis of IAs in this genetically predisposed population.}, }
@article {pmid40624236, year = {2025}, author = {Wu, D and Niu, J and Hu, J and Wang, H and Kuang, H}, title = {Metabolomics combined with metagenomics analysis reveals the potential mechanism of Zhejiang psyllium polysaccharides against hyperuricemia in rats.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {24180}, pmid = {40624236}, issn = {2045-2322}, mesh = {Animals ; *Hyperuricemia/drug therapy/metabolism/chemically induced/blood/pathology ; *Metagenomics/methods ; *Metabolomics/methods ; Rats ; Uric Acid/blood ; Gastrointestinal Microbiome/drug effects ; Male ; *Psyllium/pharmacology/chemistry ; *Polysaccharides/pharmacology/therapeutic use ; Rats, Sprague-Dawley ; Kidney/pathology/drug effects/metabolism ; Blood Urea Nitrogen ; Creatinine/blood ; }, abstract = {This study aimed to assess the anti-hyperuricemia efficacy of Zhejiang psyllium polysaccharides (ZPP) in rats and to explore its underlying mechanism. Hyperuricemia was induced by intragastric administration of potassium oxonate, hypoxanthine, and adenine. The serum levels of uric acid (UA), creatinine (Cr), and blood urea nitrogen (BUN) were measured, and kidney pathology was examined. Serum metabolomics was employed to monitor metabolic alterations following ZPP intervention. Metagenomic analysis was conducted to investigate the impact of ZPP on the intestinal flora of hyperuricemia rats. The results showed that ZPP could significantly reduce the serum UA level in hyperuricemia rats and exhibited a certain renal protective effect. The metabolomics results indicated that ZPP regulates uric acid levels in rats with hyperuricemia and ameliorates renal pathological changes by modulating biomarkers associated with purine metabolism, amino acid metabolism, and lipid metabolism. Metagenomic research also found that ZPP could increase the relative abundance of uric acid metabolism-related probiotics, such as Limosilactobacillus reuteri and Lactobacillus murinus, thereby improving intestinal flora imbalance in rats with hyperuricemia.}, }
@article {pmid40557789, year = {2025}, author = {Jones, KS and Pilliod, DS and Aunins, AW}, title = {Metabarcoding Analysis of Arthropod Pollinator Diversity: A Methodological Comparison of eDNA Derived From Flowers and DNA Derived From Bulk Samples of Insects.}, journal = {Molecular ecology}, volume = {34}, number = {14}, pages = {e70003}, doi = {10.1111/mec.70003}, pmid = {40557789}, issn = {1365-294X}, support = {//U.S. Bureau of Land Management/ ; //U.S. Geological Survey/ ; }, mesh = {Animals ; *DNA Barcoding, Taxonomic/methods ; *Pollination ; *Flowers/genetics ; Bees/genetics/classification ; *Biodiversity ; *DNA, Environmental/genetics ; *Arthropods/genetics/classification ; Sequence Analysis, DNA ; *Insecta/genetics/classification ; }, abstract = {Limitations of traditional insect sampling methods have motivated the development and optimisation of new non-lethal methods capable of quantifying diverse arthropod communities. Environmental DNA (eDNA) metabarcoding using arthropod-specific primers has recently been investigated as a novel way to characterise arthropod communities from the DNA they deposit on the surface of plants. This sampling method has had demonstrated success, but pollinators-especially bees-are oddly underrepresented in these studies. To evaluate this inconsistency, we investigated the limitations of eDNA metabarcoding for bees and other pollinators. We compared pollinator diversity derived from eDNA extracted from flowers and DNA extracted from pulverised bulk samples of insects collected from vane traps deployed at the same sites using three metabarcoding primers, two of which target arthropods generally (COI-Jusino and 16S-Marquina) and one that targets bumblebees (Bombus spp., COI-Milam). Across methods, we detected 77 insect families from 9 orders. The COI-Jusino marker amplified the highest taxonomic diversity compared to 16S-Marquina and COI-Milam. More amplicon sequence variants (ASVs) were recovered from vane traps (blue: 1357, yellow: 1542) than flowers (245), but only 23% of families and 13% of genera were shared among methods, indicating that flowers and blue and yellow vane traps may each sample different parts of the available arthropod community. Of 29 flower samples with known bee visitations, only 10 samples had bee detections from eDNA, and incomplete reference databases hindered assignment to species. Although our study provides additional evidence for the usefulness of eDNA metabarcoding for characterising arthropod communities, significant challenges remain when using eDNA metabarcoding methods to identify and quantify pollinator communities, especially bees.}, }
@article {pmid40415184, year = {2025}, author = {Sheyn, U and Poff, KE and Eppley, JM and Leu, AO and Bryant, JA and Li, F and Romano, AE and Burger, A and Barone, B and DeLong, EF}, title = {Mesoscale eddies shape Prochlorococcus community structure and dynamics in the oligotrophic open ocean.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, doi = {10.1093/ismejo/wraf106}, pmid = {40415184}, issn = {1751-7370}, mesh = {*Prochlorococcus/genetics/classification/growth &amp; development ; *Seawater/microbiology/chemistry ; Phylogeny ; Pacific Ocean ; Ecosystem ; Temperature ; *Microbiota ; Ecotype ; }, abstract = {Mesoscale eddies, horizontally rotating currents sometimes referred to as "ocean weather," influence open ocean macronutrient distributions, primary production, and microbial community structure. Such eddies impact ecosystems like the North Pacific Subtropical Gyre, where year-round thermal stratification limits the mixing of subsurface macronutrients with surface waters. Populations of the dominant primary producer Prochlorococcus in the North Pacific Subtropical Gyre consist of genetic variants with differential adaptive traits to light intensity, temperature, and macronutrient availability. How Prochlorococcus population variants respond to transient, localized environmental changes, however, remains an open question. Leveraging microbial community phylogenetic, metagenomic, and metatranscriptomic data, we report here a consistent, specific enrichment of Prochlorococcus high-light I ecotypes around the deep chlorophyll maximum (DCM) in cyclonic eddies, but not adjacent anticyclonic eddies. The shallower DCM depths of cyclones had lower temperatures, higher light intensities, and elevated nutrient concentrations compared to adjacent anticyclones, which favored Prochlorococcus high-light I ecotype proliferation. Prochlorococcus high-light I ecotypes in the cyclone DCM exhibited unique genetic traits related to nitrogen metabolism and were enriched in gene transcripts associated with energy production, cell replication, and proliferation. Prochlorococcus gene transcripts involved in amino acid transport, metabolism, and biosynthesis were also elevated in the cyclone. These results suggest the potential importance of nitrogen metabolism in Prochlorococcus high-light I ecotype proliferation in cyclonic eddies. Our findings demonstrate how mesoscale eddies shape microbial community structure in the oligotrophic ocean and how Prochlorococcus communities respond to short-term localized environmental variability.}, }
@article {pmid40624115, year = {2025}, author = {Liu, L and Wei, L and Mou, FX and Zhang, W and Wang, RF and Wang, Q and Wang, F}, title = {Oral microbiome dysbiosis in women with a history of pregnancy loss: a metagenomic cross-sectional study.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {24242}, pmid = {40624115}, issn = {2045-2322}, support = {Grant No. YJS-BD-19//the Special Fund for Doctoral Student Training of The Second Hospital of Lanzhou University in 2019/ ; Grant No. 071100107//The Science Foundation of Lanzhou University/ ; }, mesh = {Humans ; Female ; *Dysbiosis/microbiology ; Pregnancy ; Adult ; Cross-Sectional Studies ; Metagenomics/methods ; *Microbiota/genetics ; *Abortion, Spontaneous/microbiology ; Mouth Mucosa/microbiology ; Metagenome ; *Mouth/microbiology ; Young Adult ; }, abstract = {Pregnancy loss is a prevalent condition among women of reproductive age, significantly affecting fertility and psychological well-being. Despite advances in understanding the etiology of pregnancy loss, the role of the oral microbiome-its composition and metabolic activity-in influencing pregnancy outcomes remains underexplored. Previous studies have suggested that imbalances in the microbiota may contribute to adverse health outcomes, but few have investigated its association with pregnancy loss specifically. A total of 182 women of childbearing age were recruited for this study and divided into two groups: those with a history of pregnancy loss (n = 70) and a control group with no history of adverse pregnancy outcomes (n = 112). Clinical data and buccal mucosa samples were collected for metagenomic analysis. The inclusion of participants was based on their reproductive history, with particular attention to selecting women with at least one confirmed pregnancy loss and those with at least one successful live birth to serve as controls. The oral microbiota of women in the pregnancy loss group exhibited significantly lower richness and diversity compared to the control group (p < 0.05). Notably, specific genera such as Faecalibacterium, Roseburia, and Bacteroides were positively correlated with pregnancy loss, whereas Pseudomonas and Leptotrichia were correlated with it. These findings suggest a potential microbial dysbiosis associated with pregnancy loss. Our study identifies significant oral microbiota dysbiosis in women with pregnancy loss, characterized by reduced diversity and altered metabolic pathways. These findings underscore the potential role of oral microbial imbalance in adverse pregnancy outcomes. While our cross-sectional design and sample heterogeneity limit causal inference, they highlight the need for longitudinal cohorts and mechanistic studies. Future research integrating multi-niche microbiome profiling (e.g., gut and vaginal microbiota) is essential to unravel systemic interactions and advance targeted interventions for reproductive health.}, }
@article {pmid40624015, year = {2025}, author = {Wang, C and Zhang, L and Kan, C and He, J and Liang, W and Xia, R and Zhu, L and Yang, J and Jiang, X and Ma, W and Liang, Z and Xiao, Z and Zhang, J and Zhong, J and Sun, X and Chang, D and Wang, Z and Zhang, G and Li, M}, title = {Benefits and challenges of host depletion methods in profiling the upper and lower respiratory microbiome.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {130}, pmid = {40624015}, issn = {2055-5008}, support = {Z211100002121135//Beijing Nova Program/ ; 32100098//National Natural Science Foundation of China/ ; 2021097//Youth Innovation Promotion Association of the Chinese Academy of Sciences/ ; KCXFZ20211020163545004//Shenzhen Scientific and Technological Foundation/ ; SZZYSM202311009//Sanming Project of Medicine in Shenzen Municipality/ ; 2022YFA1304300//National Key Research and Development Program of China/ ; }, mesh = {Humans ; Bronchoalveolar Lavage Fluid/microbiology ; *Microbiota/genetics ; *Metagenomics/methods ; *Bacteria/genetics/classification/isolation &amp; purification ; *Respiratory Tract Infections/microbiology/diagnosis ; Oropharynx/microbiology ; *Respiratory System/microbiology ; }, abstract = {Metagenomic sequencing for respiratory pathogen detection faces two challenges: efficient host DNA depletion and the representativeness of upper respiratory samples for lower tract infections. In this study, we benchmarked seven host depletion methods, including a new method (F_ase), using bronchoalveolar lavage fluid (BALF), oropharyngeal swab (OP), and mock samples. All methods significantly increased microbial reads, species richness, genes richness, and genome coverage while reduced bacterial biomass, introduced contamination, and altered microbial abundance. Some commensals and pathogens, including Prevotella spp. and Mycoplasma pneumoniae, were significantly diminished. F_ase demonstrated the most balanced performance. High-resolution microbiomes profiling revealed distinct microbial niche preferences and microbiome disparities between the upper and lower respiratory tract. In pneumonia patients, 16.7% of high-abundance species (>1%) in BALF were underrepresented (<0.1%) in OP, highlighting OP's limitations as lower respiratory proxies. This study underscores both the potential and challenges of metagenomic sequencing in advancing microbial ecology and clinical research.}, }
@article {pmid40621956, year = {2025}, author = {Huang, X and Yang, L and Zhou, S and Zhong, L and Xu, G and Bi, M and Yang, X and Su, X and Rillig, MC}, title = {Plastic Biofilms as Hotspots of Nitrogen Cycling in Estuarine Ecosystems: Comparative Ecological, Genomic, and Transcriptomic Analysis Across Substrates.}, journal = {Global change biology}, volume = {31}, number = {7}, pages = {e70329}, doi = {10.1111/gcb.70329}, pmid = {40621956}, issn = {1365-2486}, support = {42021005//National Natural Science Foundation of China/ ; U23A20145//National Natural Science Foundation of China/ ; 2021-DST-004//Ningbo Municipal Science and Technology Innovative Research Team/ ; ANSO-PA-2023-18//Alliance of International Science Organizations/ ; }, mesh = {*Biofilms/growth &amp; development ; *Plastics ; *Nitrogen Cycle ; *Estuaries ; Transcriptome ; Nitrogen/metabolism ; Ecosystem ; Seawater/microbiology ; Bacteria/metabolism/genetics ; Gene Expression Profiling ; Metagenome ; }, abstract = {Biofilms represent a ubiquitous microbial lifestyle that facilitates colonization, symbiosis, and nutrient cycling, shaping environmental chemical transformations. In the Anthropocene, the proliferation of artificial surfaces, particularly plastics, has introduced novel and artificial ecological niches for microbial colonization. However, the biogeochemical potential of biofilms on these emerging artificial substrates remains largely unknown. Here, using [15]N tracing, amplicon, metagenome, and metatranscriptomic sequencing, we explore nitrogen (N) potential biogeochemistry across artificial and natural biofilms as well as the bulk seawater. Our results reveal that plastic biofilms exhibit enhanced N transformation potential, including elevated nitrification (2~45-fold), denitrification (5~44-fold), and N2O production (3~13-fold) rates, compared to natural biofilms and ambient seawater. This functional shift corresponds to distinct microbial community structures, driven by active N-cycling taxa and metabolic pathway reconfigurations on plastic surfaces. We also observe that carbohydrate metabolism pathways, such as glycolysis and the pentose phosphate pathway, were highly expressed in plastic biofilms, with transcriptional levels of glk (encoding glucokinase) and PGK (encoding phosphoglycerate kinase) increased by 6- and 2-fold, respectively. Our findings depict the role of plastic biofilms as active participants in estuarine N cycling and underscore the broader implications of plastic pollution on ecosystem biogeochemistry.}, }
@article {pmid40619813, year = {2025}, author = {Sabih Ur Rehman, S and Nasar, MI and Mesquita, CS and Al Khodor, S and Notebaart, RA and Ott, S and Mundra, S and Arasardanam, RP and Muhammad, K and Alam, MT}, title = {Integrative systems biology approaches for analyzing microbiome dysbiosis and species interactions.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {4}, pages = {}, doi = {10.1093/bib/bbaf323}, pmid = {40619813}, issn = {1477-4054}, support = {G00005310//UAEU-ZU/ ; G00004960//UPAR/ ; G00004540//UPAR/ ; G00004152//UPAR/ ; }, mesh = {Humans ; *Dysbiosis/microbiology ; *Systems Biology/methods ; *Microbiota ; Metagenomics ; Metabolomics ; Proteomics ; }, abstract = {Microbiomes are crucial for human health and well-being, with microbial dysbiosis being linked to various complex diseases. Therefore, understanding the structural and functional changes in the microbiome, along with the underlying mechanisms in disease conditions, is essential. In this review, we outline the structure and function of different human microbiomes and examine how changes in their composition may contribute to diseases. We highlight critical information associated with microbial dysbiosis and explore various therapeutic strategies for restoring a healthy microbiome, including microbiota transplantation, phage therapy, probiotics, prebiotics, dietary interventions, and drug-based approaches. Further, to better understand microbiome dysbiosis, we discuss multi-omics approaches including metagenomics, metatranscriptomics, metaproteomics, and meta-metabolomics, alongside computational modeling approaches such as ecological and metabolic network analysis. We outline key challenges associated with multi-omics techniques and emphasize the importance of integrative systems biology approaches that combine multi-omics data with computational modeling. These approaches are crucial for effectively analyzing microbiome data, providing deeper insights into species interactions and microbiome dynamics. Finally, we offer insights into future research directions in the field of microbiome research. This review makes a unique contribution to microbiome research by presenting a holistic framework that integrates multi-omics data with multi-scale modeling to elucidate microbial interactions, microbiome dysbiosis, and their modulation in disease-associated contexts.}, }
@article {pmid40617811, year = {2025}, author = {Zhu, B and Liang, L and Chen, S and Li, H and Huang, Y and Wang, W and Zhang, H and Zhou, J and Xiong, D and Li, X and Li, J and Ning, Y and Shi, X and Wu, F and Wu, K}, title = {Multi-kingdom microbial changes and their associations with the clinical characteristics in schizophrenia patients.}, journal = {Translational psychiatry}, volume = {15}, number = {1}, pages = {228}, pmid = {40617811}, issn = {2158-3188}, mesh = {Humans ; *Schizophrenia/microbiology/metabolism/physiopathology ; Male ; Female ; *Gastrointestinal Microbiome ; Adult ; Middle Aged ; Feces/microbiology ; Case-Control Studies ; Metabolic Networks and Pathways ; Fungi ; }, abstract = {Accumulating evidence has highlighted alterations in the gut microbiome in schizophrenia (SZ); however, the role of multi-kingdom microbiota in SZ remains inadequately understood. In this study, we performed metagenomic sequencing of fecal samples from 36 SZ patients and 55 healthy controls (HC) to profile bacterial, fungal, archaeal, and viral communities, along with functional pathways. We also conducted co-occurrence network analysis to explore the relationships among differential microbial species and metabolic pathways separately. Additionally, we assessed the associations of these differential species and functional pathways with clinical characteristics. Our findings revealed significant differences in species between SZ patients and HC, identifying not only 17 bacterial species, but also 8 fungal, 26 archaeal, and 19 viral species. Functional pathway analysis revealed 21 metabolic pathways significantly altered in SZ patients, including an increase in tryptophan metabolism, while biosynthesis of amino acids was decreased. Network analysis further uncovered more complex inter-kingdom interactions in SZ patients, with specific fungal species appearing exclusively in the SZ network. Importantly, significant associations were observed between microbial species and functional pathways with clinical characteristics, including symptom severity, cognitive function, and clinical biochemical marker. For instance, the abundance of Streptococcus vestibularis was positively correlated with homocysteine levels; the ubiquinone and other terpenoid-quinone biosynthesis was positively correlated with both symptom severity and C-reactive protein. Our findings reveal the intricate microbial dysbiosis present in SZ patients, suggesting multi-kingdom microbial interactions play a crucial role in SZ patients, highlighting promising avenues for potential diagnostic and therapeutic applications.}, }
@article {pmid40615957, year = {2025}, author = {Durand, K and Ogier, JC and Nam, K}, title = {The evaluation of shotgun sequencing and rpoB metabarcoding for taxonomic profiling of bacterial communities.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {413}, pmid = {40615957}, issn = {1471-2180}, support = {ANR-10-LABX-04-01//Agence Nationale de la Recherche/ ; ANR-10-LABX-001-01//Agence Nationale de la Recherche/ ; ANR-16-IDEX-0006//Agence Nationale de la Recherche,France/ ; Resistome//Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement/ ; }, mesh = {*DNA Barcoding, Taxonomic/methods ; *Bacteria/genetics/classification ; *DNA-Directed RNA Polymerases/genetics ; *Sequence Analysis, DNA/methods ; DNA, Bacterial/genetics ; Computational Biology/methods ; Phylogeny ; *Microbiota/genetics ; Metagenomics/methods ; Bacterial Proteins/genetics ; High-Throughput Nucleotide Sequencing/methods ; Shotgun Sequencing ; }, abstract = {BACKGROUND: The importance of microbial community profiling has been increasingly recognized in biological and environmental research. While metabarcoding has been widely used for such analysis by targeting specific DNA sequences as markers, shotgun sequencing has been proposed as an alternative method because the analysis of whole genomes can potentially reduce biases introduced by targeted approaches. However, it is largely unknown whether shotgun sequencing may provide improved precision for qualitative taxonomic identification and quantitative abundance estimation compared with metabarcoding with housekeeping gene markers, such as the rpoB gene. Furthermore, the comparative performance of various bioinformatics pipelines for shotgun data analysis remains uncertain. In this study, we evaluated the performance of rpoB metabarcoding and shotgun sequencing coupled to various bioinformatic pipelines to describe the bacterial diversity of artificially generated mock bacterial communities, which included eukaryote gDNA intentional contamination or whole-genome amplification. For shotgun sequencing, the Assembly-Binning-Method and k-mer-based approaches were evaluated.<br><br>RESULTS: For taxonomic profiling, the Assembly-Binning-Method and rpoB metabarcoding exhibited comparable sensitivity and precision, whereas k-mer approaches produced a notably high number of false negatives. In some cases, the Assembly-Binning-Method improved taxonomic resolution compared with rpoB metabarcoding by identifying taxa at the species level rather than the genus level. Regarding the quantification of microbial composition, the Assembly-Binning-Method consistently showed a higher correlation with expected values &#x200b;&#x200b;and a lower dissimilarity index than rpoB metabarcoding. The use of three sets of reference genomes to calculate depth coverage did not systematically affect the precision of the Assembly-Binning-Method.<br><br>CONCLUSIONS: These results demonstrate that although shotgun sequencing and rpoB metabarcoding have nearly equivalent accuracy in taxonomic profiling, shotgun sequencing has better taxonomic resolution and outperforms rpoB metabarcoding in quantitative estimation of microbial community abundance using the Assembly-Binning approach.}, }
@article {pmid40499078, year = {2025}, author = {Xue, K and Wang, P and Lin, Q and Xie, J and Cong, L and Yan, Z}, title = {Uncovering the Single Amino-Acid Polymorphisms of the Human Gut Ecosystem.}, journal = {Journal of proteome research}, volume = {24}, number = {7}, pages = {3429-3446}, doi = {10.1021/acs.jproteome.5c00108}, pmid = {40499078}, issn = {1535-3907}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Polymorphism, Single Nucleotide ; *Amino Acids/genetics ; Metagenome/genetics ; Inflammatory Bowel Diseases/microbiology/genetics ; Diabetes Mellitus, Type 1/microbiology/genetics ; Proteome/genetics ; }, abstract = {Single nucleotide polymorphisms (SNPs) are the most common type of genetic variation in the gut microbial metagenome and the host genome, but they could not adequately represent the protein-level variants. Single amino-acid polymorphisms (SAP) derived from nonsynonymous SNPs can cause functional changes of proteins and are important forces of adaption. However, SAP remains quite unexplored for the human gut microbiome. Here, we present a comprehensive large-scale analysis of SAP in the gut ecosystem, introducing a rigorous computational pipeline for detecting such protein variation from 992 published human metaproteomes. We find varied yet elaborate SAP patterns, capturing both known and novel functions and adaptive strategies of gut microbes. Microbial SAP is enriched in the outermost shell, motility devices, and ribosomes. Generally, gut microbial SAP is more convergent in metabolic subpathway regions and is enriched in the initial steps of carbohydrate metabolism pathways that catalyze the formation and isomerization of phosphorylated sugars. Furthermore, microbial and host mutant peptide patterns were altered and exhibited significant correlations in both inflammatory bowel disease and type 1 diabetes. Our results highlight the functional and clinically relevant implications and potential host-microbial interactions of gut ecosystem SAP.}, }
@article {pmid40456384, year = {2025}, author = {Nayyar, J and Bedu-Ferrari, C and Patangia, D and Hurley, E and Feeley, L and Ross, RP and Stanton, C and Brady, P}, title = {Gut and oral microbial profile associations to oral cancer.}, journal = {Journal of dentistry}, volume = {160}, number = {}, pages = {105848}, doi = {10.1016/j.jdent.2025.105848}, pmid = {40456384}, issn = {1879-176X}, mesh = {Humans ; *Mouth Neoplasms/microbiology/pathology ; Saliva/microbiology ; Male ; Female ; Middle Aged ; *Mouth/microbiology ; Aged ; *Microbiota ; *Gastrointestinal Microbiome ; Adult ; Fusobacterium nucleatum/isolation &amp; purification ; Biomarkers, Tumor/analysis ; }, abstract = {The human microbiome is widely known to be associated with health and disease. The oral microbiome has been linked with oral diseases and infections, though not many studies have explored the relation between oral and gut microbiome with oral cancer based on lesion histology METHODS: This study uniquely explores the oral and gut microbiota in 30 participants (n = 30) divided into three groups based on histology; Benign (B) (n = 15), Potentially Malignant (PM) (n = 8), and Malignant (M) (n = 7) oral lesions. Using shotgun metagenomic sequencing, we analysed microbiota profiles to determine their potential as biomarkers for oral malignancy RESULTS: Distinct gut microbial profiles were observed between Benign and Malignant groups and the association of specific microbes in oral saliva, such as Haemophilus parainfluenzae, Veillonella parvula, Fusobacterium nucleatum and Rothia mucilaginosa were strongly associated with malignancy CONCLUSION: The data from this exploratory study suggest that oral and gut microbiomes could act as possible biomarkers and aid in early detection and assessment of oral cancer risk. With regard to potentially malignant lesions, future research could study individual Oral Potentially Malignant Disorders (OPMDs) as distinct entities due to the wide variation in clinical and histological presentation. Further research is required to develop definitive biomarkers in both potentially malignant and malignant oral lesions CLINICAL SIGNIFICANCE: While smoking and alcohol are known risk factors for oral cancer, a biomarker such as the saliva/stool microbiome profile could help identify a risk indicator or a potential risk factor. Additionally such a biomarker could help identify patients with OPMDs that are likely to undergo malignant transformation.}, }
@article {pmid40015949, year = {2025}, author = {Hu, M and Xu, Y and Wang, Y and Huang, Z and Wang, L and Zeng, F and Qiu, B and Liu, Z and Yuan, P and Wan, Y and Ge, S and Zhong, D and Xiao, S and Luo, R and He, J and Sun, M and Zhuang, X and Guo, N and Cui, C and Gao, J and Zhou, H and He, X}, title = {Gut microbial-derived N-acetylmuramic acid alleviates colorectal cancer via the AKT1 pathway.}, journal = {Gut}, volume = {74}, number = {8}, pages = {1230-1245}, doi = {10.1136/gutjnl-2024-332891}, pmid = {40015949}, issn = {1468-3288}, mesh = {*Colorectal Neoplasms/metabolism/microbiology ; Animals ; Humans ; *Gastrointestinal Microbiome/physiology ; Mice ; *Proto-Oncogene Proteins c-akt/metabolism ; *Muramic Acids/metabolism/pharmacology ; Male ; Signal Transduction ; Female ; Peptidoglycan/metabolism ; Disease Models, Animal ; Carcinogenesis ; Feces/chemistry/microbiology ; }, abstract = {BACKGROUND: Gut microbial metabolites are recognised as critical effector molecules that influence the development of colorectal cancer (CRC). Peptidoglycan fragments (PGFs) produced by microbiota play a crucial role in maintaining intestinal homeostasis, but their role in CRC remains unclear.<br><br>OBJECTIVE: Here, we aimed to explore the potential contribution of PGFs in intestinal tumourigenesis.<br><br>DESIGN: The relative abundance of peptidoglycan synthase and hydrolase genes was assessed by metagenomic analysis. Specific PGFs in the faeces and serum of CRC patients were quantified using targeted mass spectrometry. The effects of PGF on intestinal tumourigenesis were systematically evaluated using various murine models of CRC and organoids derived from CRC patients. Downstream molecular targets were screened and evaluated using proteome microarray, transcriptome sequencing and rescue assays.<br><br>RESULTS: Metagenomic analysis across seven independent cohorts (n=1121) revealed a comprehensive reduction in peptidoglycan synthase gene relative abundance in CRC patients. Targeted mass spectrometry identified significant depletion of a specific PGF, N-acetylmuramic acid (NAM) in CRC patients, which decreased as tumours progressed (p<0.001). NAM significantly inhibits intestinal tumourigenesis in various models, including Apc [Min/+], AOM/DSS-treated and MC38 tumour-bearing mice. Additionally, NAM inhibits the growth of patient-derived CRC organoids in a concentration-dependent manner. Mechanistically, NAM inhibits the activation of AKT1 by directly binding to it and blocking its phosphorylation, which is a partial mediator of NAM's anticancer effects.<br><br>CONCLUSION: The PGF NAM protects against intestinal tumourigenesis by targeting the AKT1 signalling pathway. NAM may serve as a novel potential preventive and therapeutic biomarker against CRC.}, }
@article {pmid40615853, year = {2025}, author = {Li, S and Xu, Z and Diao, H and Zhou, A and Tu, D and Wang, S and Feng, Y and Feng, X and Lai, Y and Yang, S and Tang, B}, title = {Gut microbiome alterations and hepatic encephalopathy post-TIPS in liver cirrhosis patients.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {745}, pmid = {40615853}, issn = {1479-5876}, mesh = {Humans ; *Hepatic Encephalopathy/microbiology/etiology/blood ; *Liver Cirrhosis/microbiology/surgery/complications ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Middle Aged ; *Portasystemic Shunt, Transjugular Intrahepatic/adverse effects ; Ammonia/blood ; Aged ; }, abstract = {BACKGROUND: The transjugular intrahepatic portosystemic shunt (TIPS), a crucial tool for treating complications related to portal hypertension in patients with liver cirrhosis, is often associated with an increased risk of postoperative complications such as hepatic encephalopathy. Accurate preoperative prediction of the risk of developing hepatic encephalopathy is critical for optimizing the rational clinical application of TIPS.<br><br>METHODS: In this study, stool samples from 67 patients were collected preoperatively and 1&#xa0;month postoperatively and metagenomic sequencing was performed to assess the composition of the gut microbiota. The differential abundances of species and MetaCyc pathways were analyzed using microbiome multivariate associations with linear models. Correlations between variables, including species abundance, the MetaCyc pathway, and clinical characteristics, were assessed using the Pearson correlation test. Prognostic models were developed from metagenomic sequencing cohorts to predict hepatic encephalopathy (HE) and elevated blood ammonia levels.<br><br>RESULTS: We demonstrated that the abundance of Phocaeicola vulgatus increased after TIPS, and the urea cycle decreased. A positive correlation was observed between P.vulgatus and elevated blood ammonia levels (P&#x2009;<&#x2009;0.05). Patients exhibiting increased blood ammonia after TIPS showed significant enrichment of P.vulgatus (LDA&#x2009;>&#x2009;2.5), accompanied by a reduction in the urea cycle (P&#x2009;<&#x2009;0.05) and associated enzymes (P&#x2009;<&#x2009;0.05). Similar microbiota alterations were identified in patients who experienced postoperative hepatic encephalopathy. Furthermore, a comprehensive genetic profile of P.vulgatus was developed, highlighting its ability to increase amino acid metabolism. Many models have shown that the use of gut microbiota characteristics has greater predictive performance.<br><br>CONCLUSION: Multiple machine learning models revealed that P.vulgatus may serve as a significant predictive microbe for hepatic encephalopathy after TIPS, which may be closely related to its ability to metabolize ammonia. These findings establish a microbiome-based framework for postoperative complication risk stratification and personalized preoperative interventions and offer unexplored targets for future research.}, }
@article {pmid40570762, year = {2025}, author = {Pateriya, D and Malwe, AS and Sharma, VK}, title = {CRCpred: An AI-ML tool for colorectal cancer prediction using gut microbiome.}, journal = {Computers in biology and medicine}, volume = {195}, number = {}, pages = {110592}, doi = {10.1016/j.compbiomed.2025.110592}, pmid = {40570762}, issn = {1879-0534}, mesh = {*Gastrointestinal Microbiome ; Humans ; *Colorectal Neoplasms/microbiology/diagnosis ; *Machine Learning ; Deep Learning ; Algorithms ; }, abstract = {Colorectal cancer (CRC) is a leading cause of death worldwide. A plethora of research shows the alteration of the gut microbiome and the association of bacterial taxa with CRC. Gaining insights into the health status through microbiome-based diagnosis is a rapidly growing area of research. Many studies have utilized machine learning (ML) to leverage gut microbial dysbiosis for CRC screening, yet most have been limited by their training data and algorithms. Here, using 1728 publicly available metagenomic samples from 11 studies across eight countries, we developed a web-based tool, "CRCpred," employing ML and deep learning-based hybrid algorithms for CRC prediction. The XGBoost algorithm demonstrated the highest performance, achieving an average area under the curve (AUC) of 0.90 on the test and 0.91 on the validation datasets. Our results highlight the utility of CRCpred in predicting CRC and healthy status using gut bacterial species relative abundance profile. CRCpred is publicly available at https://metabiosys.iiserb.ac.in/crcpred.}, }
@article {pmid40615598, year = {2025}, author = {Shah, M and Sieber, G and Deep, A and Beisser, D and Boenigk, J}, title = {Unravelling the temporal dynamics of community functions in protists induced by treated wastewater exposure using metatranscriptomics.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23957}, pmid = {40615598}, issn = {2045-2322}, mesh = {*Wastewater/microbiology ; *Transcriptome ; Ecosystem ; Fresh Water/microbiology ; *Eukaryota/genetics ; }, abstract = {The discharge of treated wastewater (TWW) into freshwater ecosystems poses a significant impact on microbial communities, particularly protists, which play a crucial role in nutrient cycling and ecosystem stability. While the ecological effects of TWW on microbial diversity have been studied, understanding the functional responses of protist communities remains limited. This study employs metatranscriptomics to unravel the temporal dynamics of protist community functions in response to TWW exposure. Using mesocosm experiment, water samples were analyzed over a ten-day period to monitor shifts in metabolic pathways and community interactions. Our results indicate that processed metatranscriptomic data, focusing on treatment-significant pathways, is more sensitive than traditional methods, such as meta-barcoding, and non-target screening, in detecting wastewater-induced perturbations. Early exposure to TWW significantly altered expression of pathways associated with signal transduction and environmental interaction, while general metabolic pathways showed resilience. Over time, the protist community showed signs of adaptation with expression levels stabilizing towards the end of the experiment. This study underscores the importance of focussing on functional shifts rather than just taxonomic changes for assessing wastewater impacts on freshwater ecosystems. Our findings advocate for the use of metatranscriptomics as a robust indicator for TWW detection, aiding in development of targeted environmental management strategies.}, }
@article {pmid40615445, year = {2025}, author = {Di Gloria, L and Casbarra, L and Lotti, T and Ramazzotti, M}, title = {Testing the limits of short-reads metagenomic classifications programs in wastewater treating microbial communities.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23997}, pmid = {40615445}, issn = {2045-2322}, mesh = {*Wastewater/microbiology ; *Metagenomics/methods ; *Bacteria/genetics/classification ; *Microbiota/genetics ; Sewage/microbiology ; *Metagenome ; }, abstract = {Biological wastewater treatment processes, such as activated sludge (AS) and aerobic granular sludge (AGS), have proven to be crucial systems for achieving both efficient waste purification and the recovery of valuable resources like poly-hydroxy-alkanoates. Gaining a deeper understanding of the microbial communities underpinning these technologies would enable their optimization, ultimately reducing costs and increasing efficiency. To support this research, we quantitatively compared classification methods differing in read length (raw reads, contigs and MAGs), overall search approach (Kaiju, Kraken2, RiboFrame and kMetaShot), as well as source databases to assess the classification performances at both the genus and species levels using an in silico-generated mock community designed to provide a simplified yet comprehensive representation of the complex microbial ecosystems found in AS and AGS. Particular attention was given to the misclassification of eukaryotes as bacteria and vice versa, as well as the occurrence of false negatives. Notably, Kaiju emerged as the most accurate classifier at both the genus and species levels, followed by RiboFrame and kMetaShot. However, our findings highlight the substantial risk of misclassification across all classifiers and databases, which could significantly hinder the advancement of these technologies by introducing noises and mistakes for key microbial clades.}, }
@article {pmid40613581, year = {2025}, author = {Dang, T and Lysenko, A and Boroevich, KA and Tsunoda, T}, title = {VBayesMM: variational Bayesian neural network to prioritize important relationships of high-dimensional microbiome multiomics data.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {4}, pages = {}, doi = {10.1093/bib/bbaf300}, pmid = {40613581}, issn = {1477-4054}, support = {JP20H03240//JSPS KAKENHI/ ; JP24K15175//JSPS KAKENHI/ ; JPMJCR2231//JST CREST/ ; }, mesh = {Bayes Theorem ; *Microbiota ; *Neural Networks, Computer ; *Metagenomics/methods ; Humans ; *Computational Biology/methods ; Algorithms ; Multiomics ; }, abstract = {The analysis of high-dimensional microbiome multiomics datasets is crucial for understanding the complex interactions between microbial communities and host physiological states across health and disease conditions. Despite their importance, current methods, such as the microbe-metabolite vectors approach, often face challenges in predicting metabolite abundances from microbial data and identifying keystone species. This arises from the vast dimensionality of metagenomics data, which complicates the inference of significant relationships, particularly the estimation of co-occurrence probabilities between microbes and metabolites. Here we propose the variational Bayesian microbiome multiomics (VBayesMM) approach, which aims to improve the prediction of metabolite abundances from microbial metagenomics data by incorporating a spike-and-slab prior within a Bayesian neural network. This allows VBayesMM to rapidly and precisely identify crucial microbial species, leading to more accurate estimations of co-occurrence probabilities between microbes and metabolites, while also robustly managing the uncertainty inherent in high-dimensional data. Moreover, we have implemented variational inference to address computational bottlenecks, enabling scalable analysis across extensive multiomics datasets. Our large-scale comparative evaluations demonstrate that VBayesMM not only outperforms existing methods in predicting metabolite abundances but also provides a scalable solution for analyzing massive datasets. VBayesMM enhances the interpretability of the Bayesian neural network by identifying a core set of influential microbial species, thus facilitating a deeper understanding of their probabilistic relationships with the host.}, }
@article {pmid40613164, year = {2025}, author = {Zhang, QL and Dong, LL and Zhang, LL and Wu, YJ and Li, M and Bo, J and Wang, LL and Jing, Y and Dou, LP and Liu, DH and Gu, ZY and Gao, CJ}, title = {[Characteristics of Gut Microbiota Changes and Their Relationship with Infectious Complications During Induction Chemotherapy in AML Patients].}, journal = {Zhongguo shi yan xue ye xue za zhi}, volume = {33}, number = {3}, pages = {738-744}, doi = {10.19746/j.cnki.issn.1009-2137.2025.03.017}, pmid = {40613164}, issn = {1009-2137}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Leukemia, Myeloid, Acute/drug therapy/microbiology ; *Induction Chemotherapy ; Feces/microbiology ; Male ; Female ; Middle Aged ; }, abstract = {OBJECTIVE: To investigate the characteristics of gut microbiota changes in patients with acute myeloid leukemia (AML) undergoing induction chemotherapy and to explore the relationship between infectious complications and gut microbiota.<br><br>METHODS: Fecal samples were collected from 37 newly diagnosed AML patients at four time points: before induction chemotherapy, during chemotherapy, during the neutropenic phase, and during the recovery phase. Metagenomic sequencing was used to analyze the dynamic changes in gut microbiota. Correlation analyses were conducted to assess the relationship between changes in gut microbiota and the occurrence of infectious complications.<br><br>RESULTS: During chemotherapy, the gut microbiota &#x3b1;-diversity (Shannon index) of AML patients exhibited significant fluctuations. Specifically, the diversity decreased significantly during induction chemotherapy, further declined during the neutropenic phase (P < 0.05, compared to baseline), and gradually recovered during the recovery phase, though not fully returning to baseline levels.The abundances of beneficial bacteria, such as Firmicutes and Bacteroidetes, gradually decreased during chemotherapy, whereas the abundances of opportunistic pathogens, including Enterococcus, Klebsiella, and Escherichia coli, progressively increased.Analysis of the dynamic changes in gut microbiota of seven patients with bloodstream infections revealed that the bloodstream infection pathogens could be detected in the gut microbiota of the corresponding patients, with their abundance gradually increasing during the course of infection. This finding suggests that bloodstream infections may be associated with opportunistic pathogens originating from the gut microbiota.Compared to non-infected patients, the baseline samples of infected patients showed a significantly lower relative abundance of Bacteroidetes (P < 0.05). Regression analysis indicated that Bacteroidetes abundance is an independent predictive factor for infectious complications (P < 0.05, OR =13.143).<br><br>CONCLUSION: During induction chemotherapy in AML patients, gut microbiota &#x3b1;-diversity fluctuates significantly, and the abundance of opportunistic pathogens increase, which may be associated with bloodstream infections. Patients with lower baseline Bacteroidetes abundance are more prone to infections, and its abundance can serve as an independent predictor of infectious complications.}, }
@article {pmid40604345, year = {2025}, author = {Kang, JW and Khatib, LA and Heston, MB and Dilmore, AH and Labus, JS and Deming, Y and Schimmel, L and Blach, C and McDonald, D and Gonzalez, A and Bryant, M and Ulland, TK and Johnson, SC and Asthana, S and Carlsson, CM and Chin, NA and Blennow, K and Zetterberg, H and Rey, FE and ,  and Kaddurah-Daouk, R and Knight, R and Bendlin, BB}, title = {Gut microbiome compositional and functional features associate with Alzheimer's disease pathology.}, journal = {Alzheimer's &amp; dementia : the journal of the Alzheimer's Association}, volume = {21}, number = {7}, pages = {e70417}, doi = {10.1002/alz.70417}, pmid = {40604345}, issn = {1552-5279}, support = {U01AG061359/AG/NIA NIH HHS/United States ; U19AG063744/AG/NIA NIH HHS/United States ; R01AG070973/AG/NIA NIH HHS/United States ; R01AG083883/AG/NIA NIH HHS/United States ; #S10 OD026929/GF/NIH HHS/United States ; //Vilas Early-Career Investigator Award/ ; #2023-00356//Swedish Research Council/ ; #2022-01018//Swedish Research Council/ ; #2019-02397//Swedish Research Council/ ; #101053962//European Union's Horizon Europe research and innovation programme/ ; #ALFGBG-71320//Swedish State Support for Clinical Research/ ; #201809-2016862//Alzheimer Drug Discovery Foundation (ADDF)/ ; #ADSF-21-831376-C//AD Strategic Fund and the Alzheimer's Association/ ; #ADSF-21-831381-C//AD Strategic Fund and the Alzheimer's Association/ ; #ADSF-21-831377-C//AD Strategic Fund and the Alzheimer's Association/ ; #ADSF-24-1284328-C//AD Strategic Fund and the Alzheimer's Association/ ; #22HLT07//European Partnership on Metrology co-financed from the European Union's Horizon Europe Research and Innovation Programme and by the Participating States/ ; //Bluefield Project/ ; //Cure Alzheimer's Fund/ ; //Olav Thon Foundation/ ; //Erling-Persson Family Foundation/ ; #FO2022-0270//Familjen R&#xf6;nstr&#xf6;ms Stiftelse, Stiftelsen f&#xf6;r Gamla Tj&#xe4;narinnor, Hj&#xe4;rnfonden, Sweden/ ; #860197//European Union's Horizon 2020 research and innovation programme under the Marie Sk&#x142;odowska-Curie/ ; JPND2021-00694//European Union Joint Programme-Neurodegenerative Disease Research/ ; UKDRI-1003//NIH and Care Research University College London Hospitals Biomedical Research Centre and the UK Dementia Research Institute at UCL/ ; }, mesh = {Humans ; *Alzheimer Disease/microbiology/pathology/cerebrospinal fluid ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Aged ; Biomarkers/cerebrospinal fluid ; Feces/microbiology ; Metagenomics ; Amyloid beta-Peptides/cerebrospinal fluid ; Aged, 80 and over ; }, abstract = {BACKGROUND: The gut microbiome is a potentially modifiable risk factor for Alzheimer's disease (AD); however, understanding of its composition and function regarding AD pathology is limited.<br><br>METHODS: Shallow-shotgun metagenomics was used to analyze the fecal microbiome of participants in the Wisconsin Microbiome in Alzheimer's Risk Study, leveraging clinical data and cerebrospinal fluid (CSF) biomarkers. Differential abundance and ordinary least squares regression analyses were performed to find differentially abundant gut microbiome features and their associations with CSF biomarkers of AD and related pathologies.<br><br>RESULTS: Gut microbiome composition and function differed between individuals with and without AD dementia. The compositional difference was replicated in an independent cohort. Differentially abundant gut microbiome features were associated with CSF biomarkers of AD and related pathologies.<br><br>DISCUSSION: These findings enhance our understanding of alterations in gut microbial composition and function in AD, and suggest that gut microbes and their pathways are linked to AD pathology.<br><br>HIGHLIGHTS: Gut microbiome composition and function differ between people with Alzheimer's disease (AD) dementia and cognitively unimpaired (CU) individuals. Co-occurring gut microbes show differential abundance across AD-related groups (AD vs CU, amyloid status+ vs amyloid status-, and apolipoprotein E (APOE) &#x3b5;4 status+ vs APOE &#x3b5;4 status-). Gut microbiome composition also differs between people with AD dementia and CU individuals in a larger validation cohort. Differentially abundant gut microbiome composition and function between AD and CU groups are correlated with cerebrospinal fluid biomarkers for AD and related pathologies.}, }
@article {pmid40604089, year = {2025}, author = {Das, B and Desai, M and Bhagora, NJ and Koringa, P and Pathan, M and Thakor, JC and Savaliya, FP and Adil, S and Hati, S}, title = {Influence of fermented whey protein fractions on the growth performance, haematological traits, serum biochemistry, faecal and caeca microbiota of broiler chickens.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23678}, pmid = {40604089}, issn = {2045-2322}, mesh = {Animals ; *Chickens/growth &amp; development/microbiology/blood ; *Whey Proteins/pharmacology/metabolism ; *Feces/microbiology ; Fermentation ; Animal Feed ; *Gastrointestinal Microbiome/drug effects ; Dietary Supplements ; *Cecum/microbiology ; Male ; Limosilactobacillus fermentum/metabolism ; Female ; }, abstract = {Nowadays researchers and consumers are concerned about antibiotic resistance in poultry products causing antibiotic-resistant pathogens. Here, we investigated the effects of fermented whey peptides (FWP) with Limosilactobacillus fermentum (M4) as a nutraceutical supplement on growth performance, blood parameters, relative organs, and metagenomic analysis of broiler chickens, aiming to develop substitute for antibiotics in poultry feeds. An active culture of Lactobacillus fermentum (M4, GenBank Accession Number: MF951096) was inoculated into sterilized cheese whey at a rate of 2% (v/v) (10[7] CFU/ml) and incubated at 37 °C for 48 h. Ninety-six one-day-old mixed-sex commercial broiler chicks were randomly assigned in a Completely Randomized Design (CRD) experiment with four treatments, each having four replicates of six broiler chickens (6 × 4 × 4). One millilitre of liquid FWP fractions (> 10 kDa, < 10 kDa, and < 3 kDa) was freshly prepared and administered daily to the respective groups along with the basal diet from the 8th to the 15th day. Our current study revealed that supplementation with FWPs to broiler diets had no significant (p < 0.05) impact on body weight and FCR but numerically FCR value was high in control group. Blood cholesterol was significantly reduced in FWP fed groups. FWP had no significant impact on various blood parameters but influenced leukocytes and platelets. Metagenomic analysis showed no significant differences in microbial proportions. Histological analysis revealed no organ toxicity. The current findings suggest that broiler diets can substitute FWP for antibiotics to improve the growth performance and birds' health, without posing any biohazards. Furthermore, FWPs provide a variety of health benefits, potentially improving the health of humans who consume broiler meat or eggs.}, }
@article {pmid40604039, year = {2025}, author = {Meng, K and Bao, Y and Chen, G and Qu, J and Liang, S and An, S and Chen, Y and Liu, X and Fu, X}, title = {Metagenomics and transcriptomics analysis of aspartame's impact on gut microbiota and glioblastoma progression in a mouse model.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23298}, pmid = {40604039}, issn = {2045-2322}, support = {GNK2023ZX06//Guangxi Academy of Agricultural Science and Technology Development Project/ ; GK-AA22117015-3//the Guangxi Major Science and Technology Program/ ; GNK2021YT117//Guangxi Academy of Agricultural Sciences Basic Research Project/ ; 2019E016//Guangdong 3D Orthopedics Biomimetic Translational Medicine Engineering Technology Research Center/ ; }, mesh = {Animals ; *Aspartame/pharmacology ; *Gastrointestinal Microbiome/drug effects/genetics ; *Glioblastoma/pathology/genetics/microbiology ; Mice ; Disease Models, Animal ; *Metagenomics/methods ; Disease Progression ; Gene Expression Profiling ; *Transcriptome/drug effects ; *Brain Neoplasms/pathology/genetics/microbiology ; Humans ; Gene Expression Regulation, Neoplastic/drug effects ; Male ; Sweetening Agents/pharmacology ; }, abstract = {Aspartame, a widely used artificial sweetener, has been extensively studied for its potential health effects. Emerging evidence suggests that aspartame intake may directly impact the composition and function of the intestinal microbiota, which could subsequently influence the risk, progression, and treatment of glioblastoma multiforme (GBM) within the tumor microenvironment. However, it remains unclear whether aspartame intake affects intestinal flora, gene expression, and epigenetic regulation during tumor progression. To address these gaps in knowledge, we conducted a comprehensive metagenomics and transcriptomics analysis of aspartame's impact on gut microbiota and glioblastoma progression in a mouse model. Using a well-established mouse model and a rigorous metagenomics and transcriptomics approach, our results demonstrated that although the aspartame diet did not significantly affect tumor growth, it induced changes in the composition of the gut microbiota, particularly a decrease in the relative abundance of the Rikenellaceae family. Additionally, key N6-methyladenosine (m[6]A)-regulated genes, such as cyclin-dependent kinase inhibitor 1A (CDKN1A), MYC (myelocytomatosis) oncogene, and transforming growth factor-β (TGFB1), were significantly upregulated in GBM tumors exposed to aspartame. Notably, the expression of TGFB1 (transforming growth factor-β) suggested a critical role in the progression of GBM mediated by aspartame-induced m[6]A modifications. Our integrative analysis offered novel perspectives on the intricate interplay between dietary aspartame intake, gut microbiota, and tumor biology.}, }
@article {pmid40603380, year = {2025}, author = {Wang, R and Wang, J and Wang, L and Cai, Y and Wang, Y and Luo, H and Chen, B and Chen, J and Fang, J and Song, Z}, title = {A novel eco-friendly Acinetobacter strain A1-4-2 for bioremediation of aquatic pollutants.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23207}, pmid = {40603380}, issn = {2045-2322}, support = {2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; 2022YFE0203900//National Key Research and Development Program of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; No. 92251303//National Natural Science Foundation of China/ ; STCSM 20050501700//Science, Technology Commission of Shanghai Municipality/ ; STCSM 20050501700//Science, Technology Commission of Shanghai Municipality/ ; STCSM 20050501700//Science, Technology Commission of Shanghai Municipality/ ; STCSM 20050501700//Science, Technology Commission of Shanghai Municipality/ ; STCSM 20050501700//Science, Technology Commission of Shanghai Municipality/ ; 2023ZKZD53//Shanghai Municipal Education Commission/ ; 2023ZKZD53//Shanghai Municipal Education Commission/ ; 2023ZKZD53//Shanghai Municipal Education Commission/ ; 2023ZKZD53//Shanghai Municipal Education Commission/ ; 2023ZKZD53//Shanghai Municipal Education Commission/ ; }, mesh = {*Acinetobacter/metabolism/genetics/isolation &amp; purification/classification ; *Biodegradation, Environmental ; Animals ; *Water Pollutants, Chemical/metabolism ; Zebrafish ; Phylogeny ; Metagenomics ; }, abstract = {The increasing accumulation of hydrocarbons and aromatic compounds in aquatic ecosystems, stemming from anthropogenic activities, poses severe ecological challenges, including disrupting biodiversity and threatening human health through the food chain. This study presents Acinetobacter strain A1-4-2, isolated from a hairy crab farming base, which could represent a novel Acinetobacter species. The metagenomic analysis of approximately 12,000 publicly available datasets revealed that this novel Acinetobacter species is widely distributed across various environments, particularly in those with high organic matter content, such as sludge, feces, and wastewater. Strain A1-4-2 exhibited exceptional metabolic capabilities, effectively degrading a diverse range of substrates, including amino acids, organic acids, oils, n-alkanes, lignin, and aromatic monomers. Genomic analysis, coupled with biological experiments, revealed that strain A1-4-2 exhibited resistance to a very limited kind of antibiotics. Moreover, the strain's biosafety, affirmed through zebrafish toxicity assays, underscores its suitability for environmental release. Additionally, the feasibility of genetic manipulation of strain A1-4-2 gives it the potential to become a chassis cell, enabling it to degrade organic pollutants more efficiently through genetic engineering. Our findings elucidate the strain's genomic and metabolic attributes, offering insights into its biodegradation potentials and developing effective strategies for ecological restoration in face of pollution.}, }
@article {pmid40555791, year = {2025}, author = {Lin, S and Sun, Z and Zhu, X and Wang, M and Zhang, Q and Qian, J and Zhang, H and Mei, Z and Pu, Y and Kong, M and Guo, P and Zhou, X and Li, J and Sun, X and Ma, L and Zhang, X and Zhao, F and Nie, J and Hong, S and Chen, J and Wang, X and Li, X and Zheng, Y}, title = {Segatella copri and gut microbial ammonia metabolism contribute to chronic kidney disease pathogenesis.}, journal = {Nature microbiology}, volume = {10}, number = {7}, pages = {1684-1697}, pmid = {40555791}, issn = {2058-5276}, mesh = {*Ammonia/metabolism ; *Renal Insufficiency, Chronic/microbiology/pathology/metabolism ; *Gastrointestinal Microbiome/physiology ; Animals ; Mice ; Humans ; Aged ; Aged, 80 and over ; Escherichia coli/genetics/metabolism ; Male ; Female ; Metagenome ; Kidney ; Mice, Inbred C57BL ; Bacterial Proteins/genetics/metabolism ; }, abstract = {Alterations in gut microbiota have been linked to chronic kidney disease (CKD), but large-scale studies and mechanistic insights are limited. Here we analysed gut metagenome data from 1,550 older individuals (aged 65-93 years) with comprehensive kidney function measurements. Segatella copri was positively associated with kidney function through microbial ammonia metabolism-related pathways and the asnA gene, which encodes an ammonia-assimilating enzyme. These associations were replicated in two external studies. In mice, ammonia supplementation increased serum levels of creatinine and blood urea nitrogen, accelerating CKD progression. In vitro cultures of S. copri or asnA-overexpressing Escherichia coli reduced ammonia concentrations, which was markedly attenuated in asnA-knockout S. copri. Gavage of either S. copri or asnA-overexpressing E. coli, but not asnA-knockout S. copri, mitigated ammonia-induced CKD progression in mice. These findings highlight the role of gut microbial ammonia metabolism in CKD pathogenesis and underscore the therapeutic potential of microbial-based interventions.}, }
@article {pmid40542287, year = {2025}, author = {Fierer, N and Leung, PM and Lappan, R and Eisenhofer, R and Ricci, F and Holland, SI and Dragone, N and Blackall, LL and Dong, X and Dorador, C and Ferrari, BC and Goordial, J and Holmes, SP and Inagaki, F and Korem, T and Li, SS and Makhalanyane, TP and Metcalf, JL and Nagarajan, N and Orsi, WD and Shanahan, ER and Walker, AW and Weyrich, LS and Gilbert, JA and Willis, AD and Callahan, BJ and Shade, A and Parkhill, J and Banfield, JF and Greening, C}, title = {Guidelines for preventing and reporting contamination in low-biomass microbiome studies.}, journal = {Nature microbiology}, volume = {10}, number = {7}, pages = {1570-1580}, pmid = {40542287}, issn = {2058-5276}, support = {SR200100005//Department of Education and Training | Australian Research Council (ARC)/ ; FT240100502//Department of Education and Training | Australian Research Council (ARC)/ ; DE250101210//Department of Education and Training | Australian Research Council (ARC)/ ; DE230100542//Department of Education and Training | Australian Research Council (ARC)/ ; APP1178715//Department of Health | National Health and Medical Research Council (NHMRC)/ ; RGY0058/2022//Human Frontier Science Program (HFSP)/ ; }, mesh = {*Microbiota/genetics ; Humans ; Biomass ; *Metagenomics/methods/standards ; Specimen Handling/standards/methods ; *DNA Contamination ; Guidelines as Topic ; }, abstract = {Numerous important environments harbour low levels of microbial biomass, including certain human tissues, the atmosphere, plant seeds, treated drinking water, hyper-arid soils and the deep subsurface, with some environments lacking resident microbes altogether. These low microbial biomass environments pose unique challenges for standard DNA-based sequencing approaches, as the inevitability of contamination from external sources becomes a critical concern when working near the limits of detection. Likewise, lower-biomass samples can be disproportionately impacted by cross-contamination and practices suitable for handling higher-biomass samples may produce misleading results when applied to lower microbial biomass samples. This Consensus Statement outlines strategies to reduce contamination and cross-contamination, focusing on marker gene and metagenomic analyses. We also provide minimal standards for reporting contamination information and removal workflows. Considerations must be made at every study stage, from sample collection and handling through data analysis and reporting to reduce and identify contaminants. We urge researchers to adopt these recommendations when designing, implementing and reporting microbiome studies, especially those conducted in low-biomass systems.}, }
@article {pmid40387372, year = {2025}, author = {Lei, Z and Zhang, H and Liu, W and Sheng, J and Zhang, H and Wang, Y and Tang, Y and Wang, H and Ding, C and Qiao, W and Zhu, Y and Yang, G and Zhang, Y and Liu, Z and Zhou, N and Hu, C and Zhao, X}, title = {Dynamic and Stable Core Microbiota Assist Plants in Enriching Selenium and Reducing Cadmium Absorption.}, journal = {Advanced science (Weinheim, Baden-Wurttemberg, Germany)}, volume = {12}, number = {25}, pages = {e00862}, doi = {10.1002/advs.202500862}, pmid = {40387372}, issn = {2198-3844}, support = {2023YFD1900904//National Key Research and Development Program of China/ ; SKLEG2024225//State Key Laboratory of Environmental Geochemical/ ; 23567601H//State Key Laboratory of North China Crop Improvement and Regulation, S&amp;T Program of Hebei/ ; 24XJTRZW13//Xinjiang Key Laboratory of Soil and Plant Ecological Processes/ ; WY22B04//Wuhan Municipal Health Commission/ ; Grants KJ2025-5//2025 Science and Technology Project of Hubei Geological Bureau/ ; Grants 2023AFD215//Hubei Provincial Natural Science Foundation and Hubei Geological Bureau of China/ ; D20234501//Science and Technology Research Project of Hubei Province/ ; 23xjz05R//Hubei Polytechnic University/ ; }, mesh = {*Selenium/metabolism ; *Cadmium/metabolism ; Rhizosphere ; *Microbiota/physiology/genetics ; Soil Microbiology ; *Brassica napus/metabolism/microbiology ; Soil/chemistry ; Plant Roots/metabolism/microbiology ; Metagenomics ; }, abstract = {Rhizosphere microbiome is crucial for regulating rhizosphere complex nutrient dynamics. However, mechanisms by which plants regulate rhizosphere microbes to manage nutrient availability under coexisting beneficial and harmful elements remain unclear. This study focuses on the rhizosphere microbiome of Brassica napus in different naturally selenium (Se)-cadmium (Cd)-rich soils, the functionality of this rhizosphere, and the changes in the availability of rhizosphere nutrients. Microbiome analysis, metagenomics, genomic analysis, strain isolation, and functional validation are performed to investigate these relationships. Results show that a significant negative correlation is observed between the rhizosphere available Se and Cd content across the plant whole growth cycle and identified a group of core microbiota that are highly positively correlated with available Se and negatively correlated with available Cd. Genomics and metagenomics analyses reveal that the core microbiota has a higher substrate preference for amino acids related to the glutathione metabolic pathway. Key glutathione-related-amino acids and synthetic microbial community significantly improve the expression of glutathione anabolism and related amino acid transport genes and enhance Se uptake and reduce Cd absorption in plants grown in various Se-Cd-rich soils. This study provides insights into the mechanisms of root-associated microbes responding to complex soil nutrients during plant growth.}, }
@article {pmid40329496, year = {2025}, author = {Rose, S and Johnson, H and Cartozzo, C and Swall, J and Simmons, T and Singh, B}, title = {Testing the efficacy of surface swab sampling to determine postmortem submersion interval (PMSI), using the microbiome colonization of skeletal remains.}, journal = {Journal of forensic sciences}, volume = {70}, number = {4}, pages = {1261-1273}, doi = {10.1111/1556-4029.70039}, pmid = {40329496}, issn = {1556-4029}, mesh = {Animals ; *Postmortem Changes ; RNA, Ribosomal, 16S/genetics ; *Microbiota ; Swine ; *Specimen Handling/methods ; *Immersion ; DNA, Bacterial ; *Water Microbiology ; Models, Animal ; *Bone and Bones/microbiology ; }, abstract = {Postmortem interval (PMI) estimation contributes valuable information in the medicolegal investigation of decomposed human remains, and estimating the postmortem submersion interval (PMSI) can specifically aid investigations involving victims discovered in aquatic environments. Microbial succession-driven models in long-term decomposition studies have utilized the abundant colonizing bacterial community of skeletal remains to estimate the PMSI using bone powder. This study investigates the use of bone surface swabbing as an effective alternative method that minimizes time and resources required for bone sampling and also provides a highly replicable method for decomposition studies. Skeletal porcine (Sus scrofa) remains were caged and submerged in both lentic and lotic environments (Henley Lake in White Hall and James River at the Rice Rivers Center in Charles City, respectively) in Central Virginia from November 2017 to November 2018. Bone surface swabs and water samples were analyzed at 500 accumulated degree days (ADD) intervals, from baseline (0 ADD) to 4500 ADD. Variable region 4 (V4) of 16S rDNA was amplified and sequenced using the Illumina MiSeq Sequencing platform and analyzed using Mothur (v.1.39.5) and R (v.4.04). Analysis of Molecular Variance (AMOVA) indicated a significant difference in bacterial community structure among and between the swab, bone, and water samples (p < 0.001, F = 7.92331), and among and between lake and river samples (p < 0.001, F = 9.38829). PMSI models were constructed using random forest models for lake swabs (R[2] = 0.83, RMSE = 623.24) and river swabs (R[2] = 0.83, RMSE = 580.2). Swab samples from both aquatic environments predicted PMSI, albeit slightly less accurately than those previously reported from bone powder (lake: R[2] = 0.96, 334.1; river: R[2] = 0.94, 498.47).}, }
@article {pmid40170447, year = {2025}, author = {Veríssimo, J and Lopes-Lima, M and Amaral, F and Chaves, C and Fernandes, V and Kemanja, M and Teixeira, A and Martins, FMS and Beja, P}, title = {Navigating Methodological Trade-Offs in eDNA Metabarcoding Biodiversity Monitoring: Insights From a Mediterranean Watershed.}, journal = {Molecular ecology resources}, volume = {25}, number = {6}, pages = {e14082}, doi = {10.1111/1755-0998.14082}, pmid = {40170447}, issn = {1755-0998}, support = {2020.03608.CEECIND//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; COVID/BD/152600/2022//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; SFRH/BD/133159/2017//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; UIDP/50027/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; LA/P/0048/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; NORTE-01-0246-FEDER-000063//European Regional Development Fund (ERDF)/ ; }, mesh = {*DNA Barcoding, Taxonomic/methods ; *Biodiversity ; Animals ; *DNA, Environmental/genetics ; *Metagenomics/methods ; Mediterranean Region ; *Vertebrates/classification/genetics ; *Environmental Monitoring/methods ; }, abstract = {Environmental DNA (eDNA) metabarcoding technologies promise significant advances in biodiversity monitoring, yet their application requires extensive optimisation and standardisation. Recent research demonstrated that increased sampling and analytical efforts are needed to improve biodiversity estimates, though fully optimising study designs is often hindered by resource constraints. Consequently, researchers must carefully navigate methodological trade-offs to design effective eDNA metabarcoding monitoring studies. We conducted a water eDNA survey of vertebrates in a Mediterranean watershed to identify key methodological factors influencing species richness and composition estimates. We examined the impacts of using high- versus low-capacity filtration capsules, varying levels of biological and technical replication, and the pooling of PCR replicates before indexing. The primary sources of variation identified were capsule filtration capacity and site replication across the watershed. While biological replication within sites and PCR replication also improved biodiversity estimates, their effects were comparatively smaller. Pooling PCR replicates before indexing performed more poorly than analysing them independently. Methodological impacts were stronger on terrestrial than on aquatic species. Based on these results, we recommend that priority should be given to high-capacity filtration and sampling across multiple sites. Site-level replication deserves lower priority, especially when filtering large water volumes. PCR replication is crucial for detecting rare species but should be balanced with increased site sampling and eventually site-level replication. Avoiding the pooling of PCR replicates is important to enhance sensitivity for rare species. Overall, we stress the importance of balancing methodological choices with resource constraints and monitoring goals, and we emphasise the need for research assessing methodological trade-offs in different study systems.}, }
@article {pmid40079420, year = {2025}, author = {Jurburg, SD}, title = {Short Read Lengths Recover Ecological Patterns in 16S rRNA Gene Amplicon Data.}, journal = {Molecular ecology resources}, volume = {25}, number = {6}, pages = {e14102}, doi = {10.1111/1755-0998.14102}, pmid = {40079420}, issn = {1755-0998}, mesh = {*RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification ; *Metagenomics/methods ; Microbiota ; Animals ; *DNA Barcoding, Taxonomic/methods ; Biodiversity ; Computational Biology/methods ; Sequence Analysis, DNA/methods ; }, abstract = {16S rRNA gene metabarcoding, the study of amplicon sequences of the 16S rRNA gene from mixed environmental samples, is an increasingly popular and accessible method for assessing bacterial communities across a wide range of environments. As metabarcoding sequence data archives continue to grow, data reuse will likely become an important source of novel insights into the ecology of microbes. While recent work has demonstrated the benefits of longer read lengths for the study of microbial communities from 16S rRNA gene segments, no studies have explored the use of shorter (< 200 bp) read lengths in the context of data reuse. Nevertheless, this information is essential to improve the reuse and comparability of metabarcoding data across existing datasets. This study reanalyzed nine 16S rRNA datasets targeting aquatic, animal-associated and soil microbiomes, and evaluated how processing the sequence data across a range of read lengths affected the resulting taxonomic assignments, biodiversity metrics and differential (i.e., before-after treatment) analyses. Short read lengths successfully recovered ecological patterns and allowed for the use of more sequences. Limited increases in resolution were observed beyond 150 bp reads across environments. Furthermore, abundance-weighted diversity metrics (e.g., Inverse Simpson index, Morisita-Horn dissimilarities or weighted Unifrac distances) were more robust to variation in read lengths. Read lengths alone contributed to consistent increases in the total number of ASVs detected, highlighting the need to consider metabarcoding-derived diversity estimates within the context of the bioinformatics parameters selected. This study provides evidence-based guidelines for the processing of short reads.}, }
@article {pmid40071381, year = {2025}, author = {da Silva, LP and Porto, M and Amorim, F and Beja, P and Mata, VA}, title = {Beware of Plant DNA in Animal Dietary Metabarcoding: Lessons From a Strictly Insectivorous Bat.}, journal = {Molecular ecology resources}, volume = {25}, number = {6}, pages = {e14100}, doi = {10.1111/1755-0998.14100}, pmid = {40071381}, issn = {1755-0998}, support = {CEECIND/02064/2017//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; CEECIND/02547/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; DL57/2016/CP1440/CP1646/CT0018//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; NORTE-01-0246-FEDER-000063//European Regional Development Fund/ ; SR20/1575//British Ecological Society/ ; }, mesh = {*Chiroptera/physiology ; Animals ; *DNA Barcoding, Taxonomic/methods ; *DNA, Plant/genetics/isolation &amp; purification ; Feces/chemistry ; *Plants/genetics/classification ; *Diet ; *Metagenomics/methods ; Arthropods ; }, abstract = {DNA metabarcoding is increasingly used in dietary studies, but it has limitations, such as detecting nonfood taxa. This issue is frequently mentioned in the literature but poorly understood, limiting interpretation of results and mitigation strategies. We evaluate the extent and sources of nonfood plant DNA in dietary metabarcoding, based on 281 faecal samples of a strictly insectivorous bat. We modelled plant taxa detections in relation to pollination syndromes, flowering and fruiting phenology and habitat associations, and we estimated co-occurrences between plants and arthropods. The bat arthropod diet was consistent with previous studies. Plants were detected in 82.9% of samples, representing 148 taxa, and all pollination syndromes evaluated. Plant detections were more frequent during their flowering periods, particularly for those with mixed pollination syndromes, suggesting a relationship between flowering and detectability. Fruiting had a positive, albeit weaker, effect. There was a tendency for more frequent detection of forest plants and less frequent detection of plants associated with riparian and agricultural habitats. Co-occurrences between arthropods and plants were weak and inconsistent. Our results highlight the potential for widespread detection of nonfood plant DNA in metabarcoding studies, calling for great care when analysing the plant component of diets. Specifically, we recommend: (i) implementing strategies for reducing plant contamination during field sampling; (ii) using multiple field and lab negative controls; and (iii) using ancillary information (e.g., sample visual inspection and literature review) to aid interpretation of metabarcoding results. Moreover, we recommend that studies reporting plant consumption results greatly diverging from dietary patterns obtained through other methods should include detailed explanations of methodological steps taken to exclude the confounding effects of nonfood plant DNA.}, }
@article {pmid40013331, year = {2025}, author = {Standley, JM and Marcelino, J and Yu, F and Ellis, JD}, title = {A Meta-Omics Approach Using eDNA and eRNA for the Assessment of Biotic Communities Associated With Royal Jelly Produced by the Western Honey Bee (Apis mellifera L.).}, journal = {Molecular ecology resources}, volume = {25}, number = {6}, pages = {e14090}, doi = {10.1111/1755-0998.14090}, pmid = {40013331}, issn = {1755-0998}, support = {//University of Florida Entomology and Nematology Gahan Endowment/ ; //Clay County Beekeepers Association/ ; 1019945//USDA/NIFA Multi-State Project/ ; AP22PPQS&amp;T00C189//USDA/APHIS Cooperative Agreement/ ; }, mesh = {Animals ; Bees/microbiology/virology/metabolism ; *Metagenomics/methods ; *Fatty Acids/metabolism ; *Microbiota ; Bacteria/classification/genetics/isolation &amp; purification ; Virome ; High-Throughput Nucleotide Sequencing ; }, abstract = {Royal jelly (RJ) is a glandular secretion fed to developing honey bee larvae by adult worker bees. It is also a potential source of disease transmission in and between honey bee colonies. We endeavored to characterize the microbiome, virome, and other biota present in RJ via an integrated meta-omics approach. Using a magnetic beads-based extraction protocol, we identified eDNA and eRNA fragments from organisms of interest in RJ using high-throughput metagenomics (DNA-seq), metatranscriptomics (total RNA-seq), and parallel sequencing. This allowed us to enhance the detection of Operational Taxonomic Units (OTUs) undetectable by standard 'omics or amplicon protocols'. Using this integrated approach, we detected OTUs present in RJ from honey bee pests and pathogens, including Melissococcus plutonius, Paenibacillus larvae, Varroa destructor, V. jacobsoni, Aethina tumida, Galleria mellonella, Vairimorpha ceranae, Apis mellifera filamentous virus, Black queen cell virus, Acute bee paralysis virus, Sacbrood virus, Deformed wing virus, Israeli acute bee paralysis virus, Kashmir bee virus, and Slow bee paralysis virus, as well as multiple beneficial gut bacteria from the genera Lactobacillus, Actinobacteria, and Gluconobacter. The presence of DNA and RNA from these organisms does not conclusively indicate the presence of live organisms in the RJ, but it does suggest some exposure of the RJ to these organisms. The results present a comprehensive eDNA and eRNA microbial profile of RJ, demonstrating that our novel method is an effective and sensitive molecular tool for high-resolution metagenomic and metatranscriptomic profiling, and is of value for detection of pathogens of concern for the beekeeping industry.}, }
@article {pmid40603374, year = {2025}, author = {Guta, M and Van Eenooghe, B and Bacha, K and Cools, P}, title = {Bacterial community profile of three Ethiopian hot springs based on 16S rRNA gene nanopore sequencing.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {23491}, pmid = {40603374}, issn = {2045-2322}, mesh = {*RNA, Ribosomal, 16S/genetics ; *Hot Springs/microbiology ; Ethiopia ; *Bacteria/genetics/classification/isolation &amp; purification ; Phylogeny ; *Nanopore Sequencing/methods ; Biodiversity ; }, abstract = {Ethiopia harbors a number of hot springs not yet well explored or studied using a metagenomic approach to reveal their bacterial diversity. Understanding the bacterial diversity of these ecosystems is valuable for uncovering their ecological roles and potential for biotechnological applications. The aim of this study was, therefore, to perform the first full-length 16S rRNA gene nanopore sequencing on the three Ethiopian hot springs, namely Shalla, Woliso and Wondo Genet. The bacterial community composition of the three hot springs, whose temperatures ranged from 45 to 96 °C, was effectively assessed using the ONT MinION sequencer. It was found that Shalla hot spring had the highest species richness and accounted for 323 species, followed by 116 species from Woliso and 54 species from Wondo Genet hot springs. Pseudomonadota and Bacillota were the most dominant phyla recovered from the three hot springs, whereas Acinetobacter and Paracoccus were the most abundant bacterial genera. The most abundant species were Alkalihalobacterium elongatum from Shalla hot spring, and Acinetobacter junii and Acinetobacter johnsonii from Wondo Genet hot spring. Our study provided the first insight into the bacterial diversity of three Ethiopian hot springs and may serve as a basis for further functional analysis of these hot springs.}, }
@article {pmid40603287, year = {2025}, author = {Samarra, A and Alcañiz, AJ and Martínez-Costa, C and Marina, A and Comas, I and Segata, N and Quijada, NM and Collado, MC}, title = {Breastfeeding and early Bifidobacterium-driven microbial colonization shape the infant gut resistome.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {6099}, pmid = {40603287}, issn = {2041-1723}, support = {MAMI-639226 project//EC | EU Framework Programme for Research and Innovation H2020 | H2020 European Institute of Innovation and Technology (H2020 The European Institute of Innovation and Technology)/ ; PROMETEO2020/12//Generalitat Valenciana (Regional Government of Valencia)/ ; CIPROM2023/030//Generalitat Valenciana (Regional Government of Valencia)/ ; }, mesh = {Humans ; *Breast Feeding ; *Bifidobacterium/physiology/genetics ; *Gastrointestinal Microbiome/genetics/drug effects ; Infant ; Female ; Infant, Newborn ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; Cesarean Section ; Metagenome ; Adult ; Male ; Milk, Human/microbiology ; Feces/microbiology ; }, abstract = {The assembly of the gut resistome in early life is key to infant health. Specific perinatal factors such as cesarean section (C-section), antibiotic exposure and lack of breastfeeding practices are detrimental to proper microbial development and increase the antimicrobial resistance genes (ARGs). Using 265 gut longitudinal metagenomes from 66 mother-infant pairs, we investigated how perinatal factors influence the acquisition and dynamics of ARGs during the first year of life. Our findings reveal that Bifidobacterium plays a crucial role in modulating the infant resistome, with its high relative abundance being associated with a lower ARG load. Exclusive breastfeeding during the first month of life accelerates the reduction of ARGs and ensures a lower resistome burden at six months. Moreover, early breastfeeding cessation correlates with a higher ARG load, underscoring its long-term influence on microbial resilience. Importantly, we identify exclusive breastfeeding as a key strategy to mitigate the impact of C-section delivery on the infant gut resistome, counteracting the early-life antibiotic exposure associated with this procedure and the resulting resistance acquisition. By promoting a microbiome enriched in Bifidobacterium, breastfeeding may help suppress ARG-carrying taxa, reducing the risk of resistance dissemination. Our findings underscore the importance of breastfeeding as a natural intervention to shape the infant microbiome and resistome. Supporting breastfeeding through public health policies could help limit the spread of antimicrobial resistance in early life.}, }
@article {pmid40602621, year = {2025}, author = {Zhang, Z and Yuan, G and Turgun, X and Turgun, Z and Hou, L and Ye, M and Wang, Y and Xu, X}, title = {Biogeographic Patterns and Ecological Roles of Microorganisms in Sediments Along an Estuarine Salinity Gradient.}, journal = {Environmental microbiology reports}, volume = {17}, number = {4}, pages = {e70139}, doi = {10.1111/1758-2229.70139}, pmid = {40602621}, issn = {1758-2229}, support = {2023A1515110368//Guangdong Basic and Applied Basic Research Foundation/ ; XJNUZBS2423//Doctoral Research Foundation of Xinjiang Normal University/ ; 42361144846 and 42461006//National Natural Science Foundation of China/ ; //Tianchi Talents (Xinjiang) Plan Project (Young Doctor)/ ; }, mesh = {*Geologic Sediments/microbiology/chemistry ; *Salinity ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Estuaries ; China ; Biodiversity ; Microbiota ; Ecosystem ; Metagenome ; Phylogeny ; }, abstract = {The distribution patterns and driving mechanisms of microbial biogeographic patterns are fundamental questions in microbiology. This study analysed and compared the bacterial biogeographic patterns in the coastal environment, focusing on the Yangtze Estuary and its adjacent coastal zone. The purpose is to explore the driving mechanisms under spatial distribution, the community assembly processes and potential functions. Our results revealed that the sediment bacterial community structure exhibited a distinct geographical pattern and was significantly influenced by environmental factors. The microbial community displayed a non-random co-occurrence pattern, and the biogeographic patterns were shaped not only by environmental constraints (deterministic processes) but also by stochastic processes resulting from dispersal limitation. The metagenome sequencing analysis revealed a pronounced salinity gradient in the nitrogen-cycling function of the bacterial community. This functional difference appears to be driven by microbial diversity changes from the estuarine region to the ocean, highlighting the key role of microbial ecological characteristics. The findings of this study contribute to a deeper understanding of microbial ecology in estuarine environments, emphasizing the complex interplay between environmental factors and microbial community dynamics in shaping the function of estuarine sediment bacterial communities.}, }
@article {pmid40601719, year = {2025}, author = {Wanjiru, T and Bulimo, W and Langat, S and Kinyua, J and Odemba, N and Yalwala, S and Oullo, D and Ochieng, R and Ngere, F and Kerich, G and Ambale, J and Achieng, E and Abuom, D and Egbo, T and Johnson, J and Ojwang, E and Eads, J and Garges, E and Eyase, F}, title = {Vertical transmission of Dengue virus type-3 and metagenomic virome profiles of Aedes aegypti mosquitoes collected in Kisumu, Kenya.}, journal = {PloS one}, volume = {20}, number = {7}, pages = {e0315492}, doi = {10.1371/journal.pone.0315492}, pmid = {40601719}, issn = {1932-6203}, mesh = {Animals ; *Aedes/virology ; Kenya ; *Dengue Virus/genetics/isolation &amp; purification/classification ; *Virome/genetics ; *Mosquito Vectors/virology ; *Infectious Disease Transmission, Vertical ; Metagenomics ; High-Throughput Nucleotide Sequencing ; Phylogeny ; Dengue/transmission/virology ; Metagenome ; Female ; }, abstract = {Aedes aegypti is the main vector of several arboviruses including chikungunya, dengue, yellow fever and Zika. Beyond arboviruses, Aedes aegypti harbours insect-specific viruses (ISVs), which can modulate mosquito's ability to transmit diseases by interfering with viral processes and triggering immune responses. Both arboviruses and ISVs can be transmitted vertically, where viruses are passed from parent to offspring. The lack of systematic molecular and entomological surveillance, has left the diversity of viruses in local Aedes aegypti populations largely unexplored. This study aimed to characterize the viromes of Aedes aegypti mosquitoes from Kisumu, Kenya, focusing on viral diversity. Immature larvae and pupae were collected from Jua Kali area in Kisumu, reared into adults, and subjected to viral isolation by cell culture and metagenomic next-generation sequencing. RNA extraction, library preparation, and Illumina MiSeq sequencing were performed on CPE positive pools and metagenomic superpools. Initial data analysis was conducted using the CZ-ID platform, with quality control applied using PrinseqLite v0.20.4 to filter low-quality reads and remove adapters. De novo sequence assembly was performed with MEGAHIT v1.2.9, followed by BLAST analysis. Phylogenetic relationships were analyzed using the Maximum Likelihood method. A total of 2,142 female Aedes aegypti, grouped into 86 pools and 4 superpools, were analyzed using cell culture and metagenomic next-generation sequencing respectively. Dengue virus type-3 was detected in one of the 86 pool. Additionally, a variety of ISVs were identified, including Iflaviruses related to Tesano Aedes Iflavirus (TeAV), Armigeres Iflavirus, and Negeviruses related to Rabai Virus. An unclassified virus closely related to Korle-Bu Aedes virus was also detected. Our study provides insights into the viral diversity within Aedes aegypti mosquitoes in Kisumu and evidence of natural vertical transmission, specifically transovarial transmission of dengue virus type-3. Ongoing research is imperative to unravel vertical transmission mechanisms and subtleties governing ISV-arbovirus interactions across diverse environmental settings.}, }
@article {pmid40601568, year = {2025}, author = {Manavalan, S and Pradeep, D and Dharmalingam, D and Semalaiyappan, J and Sivarasan, T and Venkatesan, S and Thirumal, S and Kuttiatt, VS}, title = {Comparative analysis of skin microbiome of patients with filarial lymphedema and healthy individuals.}, journal = {PloS one}, volume = {20}, number = {7}, pages = {e0325380}, doi = {10.1371/journal.pone.0325380}, pmid = {40601568}, issn = {1932-6203}, mesh = {Humans ; *Microbiota/genetics ; Male ; *Skin/microbiology ; *Elephantiasis, Filarial/microbiology ; Adult ; Female ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; Case-Control Studies ; *Lymphedema/microbiology ; Pilot Projects ; Skin Microbiome ; }, abstract = {BACKGROUND: Lymphatic filariasis, a vector borne parasitic disease is a public health problem in the tropical region. Recurrent skin and soft tissue infections termed adenolymphangitis (ADL) is a major complication of filarial lymphedema. Understanding the changes in skin microbiome associated with this disease may provide novel insights on ADL attacks and lymphedema progression. This study investigates the changes in skin microbial flora in patients affected with filarial lymphedema.<br><br>METHODS: We employed 16S rRNA gene amplicon-based metagenomic technique to profile the skin microbiome of patients with filarial lymphedema in comparison with healthy volunteers.<br><br>RESULTS: There were notable differences in the bacterial flora between patients and healthy controls. Actinobacteria were under-represented in the patient group. Staphylococcus dominated both the groups, 63% in patients and 44% in controls. Samples from a few patients showed the presence of certain rare bacteria like Eremococcus and Facklamia.<br><br>CONCLUSION: This pilot study applying advanced molecular tools provides insight on the changes in skin microflora associated with filarial lymphedema for the first time. Further studies are necessary for a better understanding of the role of the altered skin microbiome in frequent episodes of adenolymphangitis in patients with filarial lymphedema.}, }
@article {pmid40599650, year = {2025}, author = {Zhang, H and Zheng, X and Huang, Y and Zou, Y and Zhang, T and Repo, MA and Yin, M and You, Y and Jie, Z and Xu, WA}, title = {Novel potential biomarkers for predicting childhood caries via metagenomic analysis.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1522970}, pmid = {40599650}, issn = {2235-2988}, mesh = {Humans ; *Dental Caries/diagnosis/microbiology ; Child ; *Biomarkers/analysis ; *Metagenomics/methods ; Saliva/microbiology ; Female ; Male ; *Microbiota/genetics ; Bacteria/classification/genetics/isolation &amp; purification ; Metagenome ; }, abstract = {BACKGROUND: Dental caries is a prevalent global health issue, particularly among children, with significant oral and overall health implications. The oral microbiome is considered a critical factor in caries development, with various microbial species implicated in the disease process.<br><br>OBJECTIVES: This study aims to explore the changes and interactions of oral microbiota in childhood caries using metagenomic analysis, and identify potential biomarkers for early caries detection and treatment.<br><br>METHODS: Saliva samples were collected from 241 children aged 6 to 9 years, categorized into caries-free (CF), low-caries (CL), and caries-severe (CS) groups. Metagenomic sequencing was performed to analyze the oral microbiome, followed by a series of statistical and functional analyses to characterize microbial diversity and function.<br><br>RESULTS: The study revealed significant differences in the microbial community composition among the groups, with the CS group exhibiting higher alpha and beta diversity than that of the CF group. Numerous unclassified microorganisms, such as Campylobacter SGB19347 and Catonella SGB4501, are intimately linked to dental caries and display intricate interaction networks, suggesting the potential formation of a distinct ecological network. In functional assessment, we identified a possible link between pectin and caries, suggesting that microorganisms that produce pectinase enzymes might play a role in the advancement of severe dental caries. Additionally, we identified 16 species as the best marker for severe dental caries, achieving an impressive AUC of 0.91.<br><br>CONCLUSION: The role of microbiota in dental caries is multifaceted, involving a complex interplay of microbial species and functions. Our findings enhance the understanding of the microbial basis of dental caries and offer potential diagnostic and therapeutic targets. The predictive capacity of the identified biomarkers warrants further investigation for early caries detection and intervention.<br><br>CLINICAL SIGNIFICANCE: The identification of novel biomarkers through metagenomic analysis enables early detection and targeted intervention for childhood caries, potentially transforming children dental care and significantly improving long-term oral health outcomes.}, }
@article {pmid40598608, year = {2025}, author = {Liu, F and McNally, J and Flemming, D and Ingham, AB and Hunt, PW and Li, RW}, title = {Escherichia coli is implicated in the development and manifestation of host susceptibility to the roundworm Trichostrongylus colubriformis infections in sheep.}, journal = {Veterinary research}, volume = {56}, number = {1}, pages = {133}, pmid = {40598608}, issn = {1297-9716}, support = {58-8042-3-022-F//Agricultural Research Service/ ; 242102311161//Henan Provincial Science and Technology Research Project/ ; }, mesh = {Animals ; *Sheep Diseases/parasitology/microbiology/immunology ; Sheep ; *Trichostrongylosis/veterinary/parasitology/immunology ; *Trichostrongylus/physiology ; *Escherichia coli/physiology ; *Gastrointestinal Microbiome ; Disease Susceptibility/veterinary/parasitology/microbiology ; RNA, Ribosomal, 16S/genetics/analysis ; }, abstract = {Applied breeding for host resistance to gastrointestinal nematodes represents a cost-effective strategy for parasitic control. While resistance is under moderate genetic influences, gut microbial components involved in the development of resistance or susceptibility remain largely unknown. Here we characterize the structure and metabolic potential of the proximal colon microbiota in unique ovine populations bred for resistance and susceptibility using a full-length 16S rRNA gene sequencing-based microbiome approach. The resistant lambs produced significantly fewer parasite eggs than susceptible animals grazing on the same pasture. Further, the resistant lambs displayed a significant reduction in worm establishment in response to a Trichostrongylus colubriformis challenge infection (P < 0.0001; N = 20 per group). Among 32 bacterial species or strains displaying a significant difference in relative abundance between the resistant and susceptible group, E. coli was more abundant in susceptible lambs. E. coli was also ranked as the most important species in distinguishing the resistant and susceptible status. Moreover, a microbial signature or balance consisting of E. coli (Numerator) and Parabacteroides distasonis and Bacteroides thetaiotaomicron (Denominator) predicted the resistance status with high accuracy. The metagenome function prediction also revealed that several pathways related to infectious diseases, such as Shigellosis and pathogenic E. coli infection, were significantly altered between the two phenotypes. Our findings demonstrated that microbial signatures with a high predictive power for the resistance status can be developed as biomarkers to facilitate the selection for host resistance in sheep.}, }
@article {pmid40598319, year = {2025}, author = {Maeke, MD and Yin, X and Wunder, LC and Vanni, C and Richter-Heitmann, T and Miravet-Verde, S and Ruscheweyh, HJ and Sunagawa, S and Fabian, J and Piontek, J and Friedrich, MW and Hassenrück, C}, title = {Extensive data mining uncovers novel diversity among members of the rare biosphere within the Thermoplasmatota.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {155}, pmid = {40598319}, issn = {2049-2618}, support = {EXC-2077-390741603//Deutsche Forschungsgemeinschaft/ ; EXC-2077-390741603//Deutsche Forschungsgemeinschaft/ ; XJ2300006031//Start-up research fund of Hainan University, China/ ; LT0050/2023-L//Human Frontier Science Program/ ; 205320_215395//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; 03F0814//German Federal Ministry of Education and Research (BMBF)/ ; 03F0848A//German Federal Ministry of Education and Research (BMBF)/ ; }, mesh = {Phylogeny ; *Geologic Sediments/microbiology ; *Archaea/classification/genetics/isolation &amp; purification ; Metagenomics/methods ; *Data Mining/methods ; Metagenome ; Biodiversity ; RNA, Ribosomal, 16S/genetics ; Ecosystem ; Sequence Analysis, DNA ; }, abstract = {BACKGROUND: Rare species, especially of the marine sedimentary biosphere, have long been overlooked owing to the complexity of sediment microbial communities, their sporadic temporal and patchy spatial abundance, and challenges in cultivating environmental microorganisms. In this study, we combined enrichments, targeted metagenomic sequencing, and extensive data mining to uncover uncultivated members of the archaeal rare biosphere in marine sediments.<br><br>RESULTS: In protein-amended enrichments, we detected the ecologically and metabolically uncharacterized class Candidatus Penumbrarchaeia within the phylum Thermoplasmatota. By screening more than 8000 metagenomic runs and 11,479 published genome assemblies, we expanded the phylogeny of Ca. Penumbrarchaeia by 3 novel orders. All six identified families of this class show low abundance in environmental samples characteristic of rare biosphere members. Members of the class Ca. Penumbrarchaeia were predicted to be involved in organic matter degradation in anoxic, carbon-rich habitats. All Ca. Penumbrarchaeia families contain high numbers of taxon-specific orthologous genes, highlighting their environmental adaptations and habitat specificity. Besides, members of this group exhibit the highest proportion of unknown genes within the entire phylum Thermoplasmatota, suggesting a high degree of functional novelty in this class.<br><br>CONCLUSIONS: In this study, we emphasize the necessity of targeted, data-integrative approaches to deepen our understanding of the rare biosphere and uncover the functions and metabolic potential hidden within these understudied taxa. Video Abstract.}, }
@article {pmid40597620, year = {2025}, author = {Yang, L and Yan, Y and Shen, J and Xia, Y and Lang, F and Chen, C and Zou, W}, title = {Metagenomic insights into microbial community succession and its functional changes during the stage of acetic acid fermentation of shanxi aged vinegar.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {374}, pmid = {40597620}, issn = {1471-2180}, support = {20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 20220401931002//Open Project Program of Shanxi Provincial Key Laboratory for Vinegar Fermentation Science and Engineering/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 202202140601018; 202102130501008//Key Research and Development Program Projects in Shanxi Province/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; 2023NSFSC0184//Sichuan Natural Science Foundation General Project/ ; }, mesh = {*Acetic Acid/metabolism ; Fermentation ; *Metagenomics/methods ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Acetobacter/metabolism/genetics ; Metabolic Networks and Pathways ; *Microbiota/genetics ; Food Microbiology ; Metagenome ; }, abstract = {Traditional fermentation of Shanxi aged vinegar involves complex microbial interactions driving flavor synthesis, but the mechanisms underpinning metabolic adaptation and community succession remain poorly characterized. This study aimed to unravel stage-specific microbial dynamics and their functional contributions to flavor formation during Cupei fermentation. Metagenomic sequencing analyzed microbial communities and metabolic pathways at three fermentation stages (D3, D6, D9). Functional annotation (KEGG, CAZy) and species-level contribution assessments identified key taxa and genes linked to flavor biosynthesis. Microbial succession shifted from Lactobacillus dominance (64.68% at D3) to Acetobacter prevalence (48.04% at D9), with Lactobacillus acetotolerans persisting throughout (17.15-26.23%). Early-stage carbohydrate metabolism (GHs-driven: 60.38% at D3) transitioned to late-stage amino acid (15.62%) and cofactor synthesis (12.17%), activating valine, leucine, and histidine pathways critical for flavor compounds. Acetobacter oryzoeni and Acetobacter pomorum drove acetate (ALDH: 27.07-41.52%), valine (ilvE: 53.21-20.22%), and histidine (hisD: 41.83-33.30%) metabolism at D9. Low abundance species (Weissella confusa, 0.51%) and uncultured Limosilactobacillus sp. contributed via multi-gene networks (e.g., dat, ldh), which revealed an important functional contribution by overlooked low-abundance species. The study uncovers ecological coupling between microbial succession and metabolic adaptation, where dominant taxa and rare species synergistically govern flavor formation. These insights enable targeted microbial community design for flavor optimization in traditional fermented foods.}, }
@article {pmid40597414, year = {2025}, author = {Kadyan, S and Park, G and Singh, TP and Patoine, C and Singar, S and Heise, T and Domeier, C and Ray, C and Kumar, M and Behare, PV and Chakrabarty, P and Efron, P and Sheffler, J and Nagpal, R}, title = {Microbiome-based therapeutics towards healthier aging and longevity.}, journal = {Genome medicine}, volume = {17}, number = {1}, pages = {75}, pmid = {40597414}, issn = {1756-994X}, mesh = {Humans ; *Longevity ; *Gastrointestinal Microbiome ; *Healthy Aging ; *Aging ; *Microbiota ; Animals ; }, abstract = {The gut microbiome is our lifetime companion, regulating our health from birth throughout the lifespan. The gut microbiome composition changes continually with age, influencing both physiological and immunological development. Emerging evidence highlights the close association, and thus implication, of the microbiome with healthy disease-free aging and longevity. Accordingly, targeting the gut microbiome is emerging as a promising avenue to prevent, alleviate, and ameliorate aging-related disorders. Herein, we provide a prospective and inclusive framework of the close connection of the gut microbiome with human aging, while contemplating how this association is intertwined with age-related diseases. We delve into recently emerging and potential microbiome-based therapeutics that are projected to aid in alleviating myriad aging-related diseases, thereby enhancing the health and well-being of the aging population. Finally, we present a foundation and perspective underlining the prospects of microbiome-based therapeutics developed and tailored precisely for the elderly, with the overarching goal of promoting health and longevity.}, }
@article {pmid40597307, year = {2025}, author = {Wang, Z and Wang, W and Wang, Y and Hu, H and Wang, B and Zhu, W and Li, X and Hou, X and Sun, W and Liu, Z and Lu, S and Chen, X}, title = {Mapping gut microbiota and metabolite alterations in patients with postmenopausal osteoporosis in the Beijing Community of China.}, journal = {European journal of medical research}, volume = {30}, number = {1}, pages = {539}, pmid = {40597307}, issn = {2047-783X}, support = {No.2020YFC2004900//National Key Research and Development Program of China/ ; H0608//National Natural Science Foundation of China/ ; No.81672201, 81871794//Natural Science Foundation of China/ ; No.7242065//Beijing Natural Science Foundation/ ; }, mesh = {Humans ; Female ; *Gastrointestinal Microbiome ; *Osteoporosis, Postmenopausal/microbiology/metabolism/epidemiology ; Middle Aged ; Aged ; Bone Density ; Beijing ; China ; Feces/microbiology ; }, abstract = {INTRODUCTION: Postmenopausal osteoporosis (PMO) is a chronic disease in the elderly women, which has been shown to be related to the gut microbiota (GM) alternation in recent studies. Few studies have investigated which specific bacterial species and metabolites have an impact on postmenopausal osteoporosis patients, especially in urban communities.<br><br>METHODS: With the aim of comprehending GM features and metabolite variation in women suffering from PMO in the Beijing Community of China, we divided the 76 eligible participants into osteoporosis (OP) and health control (HC) groups taking into account the bone mineral density (BMD), and adopted 16 S rRNA gene sequencing and metagenomic sequencing to examine the GM compositions in the respective groups. Besides, the study adopted liquid chromatography and mass spectrometry (LC-MS) for the fecal metabolite analysis.<br><br>RESULTS: The OP group presented obviously changed bacterial &#x3b1;-diversity and &#x3b2;-diversity versus the HC group. GM at the genus level was differentially enriched in the OP or HC groups. Megamonas genus exhibited the strongest positive relevance to BMD and OC. Bacteroides genus had the strongest negative relevance to BMD and positive relevance to &#x3b2;-CTX. GM at the species level was also differentially enriched in OP or HC groups. After multiple linear regression analysis, Roseburia_intestinalis and Glycoursodeoxycholic acid were positively associated with BMD, hinting their beneficial effect in BMD. Corresponding signaling pathways also exhibited an obvious change, particularly in up-regulation Glycerol Phosphate Shuttle and down-regulation Malate-Aspartate Shuttle pathways.<br><br>CONCLUSIONS: According to the results of this study, GM and metabolites in women with PMO in the Beijing Community changed dramatically, which were significantly associated with BMD and bone turnover markers. Roseburia_intestinalis and Glycoursodeoxycholic acid levels were the most positively associated with BMD. All these assist in understanding the development mechanism of PMO from new perspectives and in developing novel therapeutic methods for improving bone health.}, }
@article {pmid40596882, year = {2025}, author = {Hekker, MD and Platteel, TN and Venekamp, RP and Top, J and Geerlings, SE and Schultsz, C and de Vos, MGJ and van de Wijgert, JHHM}, title = {Urinary tract infections in postmenopausal women revisited (UTIr): a prospective observational cohort study to explore the urobiomes of postmenopausal women with and without recurrent urinary tract infections.}, journal = {BMC infectious diseases}, volume = {25}, number = {1}, pages = {822}, pmid = {40596882}, issn = {1471-2334}, support = {OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; OCENW.XL21.XL21.088//The Dutch Research Council (NWO)/ ; }, mesh = {Humans ; Female ; *Urinary Tract Infections/microbiology/epidemiology ; *Postmenopause ; Prospective Studies ; Middle Aged ; Recurrence ; Vagina/microbiology ; *Microbiota ; Aged ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; }, abstract = {BACKGROUND: Recurrent urinary tract infections (RUTI) are prevalent, particularly among postmenopausal women, and place a significant burden on the affected individuals and the healthcare system. While Escherichia coli is the primary cause of most UTIs in premenopausal women, this may not hold true for postmenopausal women. To facilitate development of novel diagnostics, preventive interventions, and clinical management of RUTI in postmenopausal women, it is essential to strengthen the biological evidence base.<br><br>METHODS: This observational prospective cohort study will enrol 20 postmenopausal women without RUTI (controls) and approximately 30 with RUTI (cases), aiming to sample at least 50 UTI episodes. Questionnaires are completed, samples (urine, vulvoperineal and vaginal swabs, and faeces) are collected by participants or study staff at five scheduled time points over one year of follow-up, as well as during and after each UTI episode. All samples will undergo 16S rRNA amplicon sequencing, with selected urine samples also subjected to bacterial culturing, metagenomic sequencing, and metabolomics. Various urobiome comparisons will be conducted, such as between women with and without RUTI in the absence of a UTI, and over time during UTIs. Urobiomes will also be compared to vaginal, vulvoperineal, and gut microbiomes in the same women at the same time points. Finally, urine samples will be cultured to obtain bacterial isolates, which will be characterised and used for co-culture and urothelium organoid experiments.<br><br>DISCUSSION: The UTIr cohort study is an exploratory, hypothesis-generating study designed to improve understanding of the ecological mechanisms driving UTI onset, response to antibiotic treatment, and UTI recurrence in postmenopausal women. The data collected from each individual woman is longitudinal and comprehensive, which is instrumental for advancing the field. The study population consists of women over the age of 50 and the study procedures are demanding. Flexibility with protocol procedures has proven to be essential to maximise retention and minimise missing data. We recommend employing a sufficiently large recruitment team and/or planning for a sufficiently long recruitment period to accommodate the demanding nature of these types of in-depth studies with vulnerable populations.<br><br>TRIAL REGISTRATION: Not applicable.}, }
@article {pmid40596159, year = {2025}, author = {Bayatian, M and Pourbabaee, AA and Amoozegar, MA}, title = {Revealing the composition of bacterial communities in various oil-contaminated soils and investigating their intrinsic traits in hydrocarbon degradation.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {22016}, pmid = {40596159}, issn = {2045-2322}, mesh = {*Soil Microbiology ; *Hydrocarbons/metabolism ; Biodegradation, Environmental ; *Bacteria/genetics/classification/metabolism ; *Soil Pollutants/metabolism ; RNA, Ribosomal, 16S/genetics ; *Petroleum/metabolism ; Soil/chemistry ; *Microbiota ; Petroleum Pollution ; Iran ; High-Throughput Nucleotide Sequencing ; Phylogeny ; }, abstract = {This study explores prokaryotic diversity and oil biodegradation potential in soils from three evaporation ponds in the Ahvaz and Maroon oil fields, Iran. Despite prior studies on prokaryotic diversity in contaminated soils, systematic comparisons within the same region remain limited. The analysis identified distinct physicochemical differences across sites. Ahvaz 1 soil, with a loamy silty clay texture, had the highest salinity (15.4%) and total petroleum hydrocarbons (TPH, 3.5%). Ahvaz 4 soil, loamy silty in texture, showed 7.49% salinity and 1% TPH, while Maroon 3 soil exhibited the lowest salinity (5.06%) and TPH (0.5%). Prokaryotic diversity and biodegradation traits were assessed using 16S rRNA next-generation sequencing (NGS) and qPCR, respectively. NGS revealed reduced prokaryotic diversity in all contaminated soils, with Bacillota dominating, whereas Pseudomonadota prevailed in all control samples. Maroon 3 soils had higher diversity, but Cyanobacteria and Actinomycetota, dominant in controls, were replaced by Chloroflexota, Gemmatimonadota, and Acidobacteriota in polluted soils. At the genus level, Bacillus, Lysinibacillus, Virgibacillus, Brevibacillus, and Paenibacillus showed increased abundance in contaminated soils. Real-time PCR of alkB and C23DO genes indicated enhanced hydrocarbon degradation potential. FAPROTAX and PICRUSt2 analyses revealed enhanced microbial capacity for hydrocarbon degradation in polluted soils, with enriched functions related to chemoheterotrophy, aromatic compound degradation, and increased levels of alkane 1-monooxygenase, alcohol dehydrogenase, and protocatechuate 4,5-dioxygenase subunits. The findings highlight crude oil's impact on microbial community structure, reducing archaea and emphasizing bacterial dominance while underscoring shifts in microbial responses and functional gene expression in hydrocarbon degradation.}, }
@article {pmid40595658, year = {2025}, author = {Zhang, Z and Liu, Y and Zhao, W and Liu, K and Chen, Y and Wang, F and Mao, G and Ji, M}, title = {Distinct genes and microbial communities involved in nitrogen cycling between monsoon- and westerlies-dominated Tibetan glaciers.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {5926}, pmid = {40595658}, issn = {2041-1723}, support = {42421001//National Natural Science Foundation of China (National Science Foundation of China)/ ; 42330410//National Natural Science Foundation of China (National Science Foundation of China)/ ; U21A20176//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Tibet ; *Nitrogen Cycle/genetics ; *Ice Cover/microbiology ; *Microbiota/genetics ; Nitrogen/metabolism ; Metagenome/genetics ; Climate Change ; Bacteria/genetics/metabolism/classification ; Temperature ; Nitrous Oxide/metabolism ; Nitrogen Fixation/genetics ; Transcriptome ; }, abstract = {The Tibetan Plateau (TP) glaciers are influenced by monsoon and westerlies. They are highly sensitive to climate change, with atmospheric nitrogen deposition significantly impacting microbial communities and functions. However, key uncertainties persist regarding biogeography and drivers of genes and microbial communities involved in nitrogen cycling. Here, we investigate the diversity and transcriptional activity of microbial communities and nitrogen-cycling genes using 85 metagenomes and 28 metatranscriptomes from the ablation zone of 21 TP glaciers. Our results show that over 90% of the glacial taxa possess the potential for nitrogen metabolism, with ~33% exhibiting transcriptional activity. Moreover, monsoon-dominated glaciers present greater microbial diversity and higher prevalence of nitrogen-fixing genes than westerlies-dominated glaciers, linked to higher temperatures. Comparatively, the latter show elevated genomic potential for nitrous oxide emissions, likely due to higher nitrate concentrations. These findings establish temperature-nitrogen co-regulation of microbial nitrogen transformations, critical for predicting climate feedback in the extreme environment.}, }
@article {pmid40595444, year = {2025}, author = {Minabou Ndjite, G and Jiang, AK and Ravel, CT and Grant, MR and Jiang, X and Hall, B}, title = {Gut microbial utilization of the alternative sweetener, D-allulose, via AlsE.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {970}, pmid = {40595444}, issn = {2399-3642}, support = {1R35GM155208-01//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; *Sweetening Agents/metabolism ; *Fructose/metabolism ; Adult ; *Clostridium/genetics/enzymology/metabolism ; }, abstract = {D-allulose, a rare sugar with emerging potential as a low-calorie sweetener, has garnered attention as an alternative to other commercially available alternative sweeteners, such as sugar alcohols, which often cause severe gastrointestinal discomfort. D-allulose-6-phosphate 3-epimerase (AlsE) is a prokaryotic enzyme that converts D-allulose-6-phosphate into D-fructose-6-phosphate, enabling its use as a carbon source. However, the taxonomic breadth of AlsE across gut bacteria remains poorly understood, hindering insights into the utilization of D-allulose by microbial communities. In this study, we provide experimental evidence showing that Clostridium innocuum is capable of D-allulose metabolism via a homologous AlsE. A bioinformatics search of 85,202 bacterial genomes identified 116 bacterial species with AlsE homologs, suggesting a limited distribution of AlsE in bacteria. Additionally, Escherichia coli contains a copy of alsE, but it does not grow on D-allulose as a sole carbon source unless alsE is heterologously expressed. A metagenomic analysis revealed that 15.8% of 3079 adult healthy human metagenomic samples that we analyzed contained alsE, suggesting a limited prevalence of the enzyme in the gut microbiome. These results suggest that the gut microbiome has limited capacity to metabolize D-allulose via alsE, supporting its use as an alternative sweetener with minimal impact on microbial composition and gastrointestinal symptoms. This finding also enables personalized nutrition, allowing diabetic individuals to assess their gut microbiota for alsE, and manage glycemic response while reducing gastrointestinal distress.}, }
@article {pmid40595004, year = {2025}, author = {Raina, TK and Gupta, M and Salgotra, RK}, title = {Metagenomic analysis to identify unique microbes in the rhizosphere of basmati rice (Oryza sativa L.) accessions.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {22864}, pmid = {40595004}, issn = {2045-2322}, mesh = {*Oryza/microbiology/genetics ; *Rhizosphere ; *Metagenomics/methods ; Soil Microbiology ; *Bacteria/genetics/classification/isolation &amp; purification ; Odorants/analysis ; Microbiota ; }, abstract = {The captivating aroma of basmati rice is highly favoured by consumers across the globe. Unfortunately, the aroma of basmati rice has been gradually diminishing over time due to the excessive use of inorganic fertilizers and the impact of climate change. To understand the microbial community that plays a significant role in aroma enhancement in basmati rice accessions, a systematic study is required. A unique rhizobacteria of basmati rice associated with basmati rice were Actinobacteria, Bacillus subtilis, Burkholderia, Enterobacter, Klebsiella, Lactobacillus, Micrococcus, Pseudomonas, and Sinomonas. The biosynthesis of potential precursors (ornithine, putrescine, proline, and polyamines) of aroma in basmati rice involved various enzymes such as acetylornithine aminotransferase, acetylornithine deacetylase, N-acetylornithine carbomyltransferase, acetylornithine/succinyldiaminopimelate aminotransferase, and ornithine cyclodeaminase. These findings significantly contribute to the existing understanding of the rhizobacteria associated with basmati rice that play a crucial role in enhancing the aroma. The introduction of these cultures into the basmati rice growing areas has the potential to augment the plant growth and enhances the aroma. The present study explored the functional potential of the microbial community associated with aroma improvement in basmati rice. This will also enhance the export potential of the basmati rice in the region on sustainable basis.}, }
@article {pmid40594354, year = {2025}, author = {Flores, SS and Cordovez, V and Arias Giraldo, LM and Leon-Reyes, A and van 't Hof, P and Raaijmakers, JM and Oyserman, BO}, title = {Unveiling diversity and adaptations of the wild tomato Microbiome in their center of origin in the Ecuadorian Andes.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {22448}, pmid = {40594354}, issn = {2045-2322}, support = {CZ07-000440-2018//SENESCYT scholarship/ ; 10093//Chancellor Grant and COCIBA-USFQ/ ; 10093//Chancellor Grant and COCIBA-USFQ/ ; 024.004.014/NWO_/Dutch Research Council/Netherlands ; 024.004.014/NWO_/Dutch Research Council/Netherlands ; }, mesh = {*Solanum lycopersicum/microbiology/genetics ; *Microbiota/genetics ; Soil Microbiology ; Rhizosphere ; Ecuador ; Plant Roots/microbiology ; Biodiversity ; *Adaptation, Physiological ; Phylogeny ; }, abstract = {Microbiome assembly has been studied for many plant species and is recognized as a key driver of plant growth and plant tolerance to (a)biotic stresses. To date, assembly of the tomato rhizosphere microbiome has been investigated primarily for commercial varieties and field soils subjected to agricultural management practices, whereas the microbiome of wild tomato genotypes in their native habitats remains largely unexplored. This research focused on distinct populations of Solanum pimpinellifolium in three natural habitats in the Ecuadorian Andes to identify the taxonomic and functional diversity of their rhizosphere microbiome. The results showed that, despite genotypic differences among the wild tomato populations, different soil types and soil microbiome compositions, the rhizosphere microbiome showed strikingly compositional similarity across the three habitats. Proteobacteria, in particular taxa classified as Enterobacteriaceae, and specific unclassified fungal taxa were highly represented in the rhizosphere of S. pimpinellifolum. Metagenomic analyses suggested that the prevalence of Enterobacteriaceae on wild tomato roots may be explained by several traits, in particular nutrient competition, motility, iron acquisition, membrane transport, stress response, and plant hormone biosynthesis. These results reveal a conserved microbiome signature associated with wild tomato rhizosphere in their center of origin. Just as the genomes of wild crop ancestors provide a valuable source of beneficial traits for breeding cultivated varieties, exploring their microbiome in native environments could uncover microbial taxa and traits that similarly contribute to crop growth and health.}, }
@article {pmid40594317, year = {2025}, author = {Song, X and Li, JN and Wang, D and Han, ZY and Yan, XX and Yang, ZH and Xu, J and Wang, Q and Wu, D}, title = {Metagenomics reveals functional profiles of gut microbiota during the recovery phase of acute pancreatitis.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {20549}, pmid = {40594317}, issn = {2045-2322}, support = {32170788//National Natural Science Foundation of China/ ; 2022-PUMCH-B-023//National High Level Hospital Clinical Research Funding/ ; ZK108000//National Key Clinical Specialty Construction Project/ ; 7232123//Natural Science Foundation of Beijing/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; *Pancreatitis/microbiology ; Male ; Female ; Middle Aged ; Adult ; Aged ; Acute Disease ; Bacteria/genetics/classification ; }, abstract = {Gut microbiota play a critical pathogenic role in acute pancreatitis (AP). This study aimed to investigate the composition and function of gut microbiota during the recovery phase of AP. Rectal swab samples obtained from 12 AP patients of varying severity during both the acute and recovery phases were sequenced using shotgun metagenomic sequencing. We analysed α-diversity, enterotypes, and the dominant microbiome composition, and performed differential analysis of gut microbiota composition and functional enrichment. During the recovery phase of AP, microbial diversity remained decreased, and minimal difference were observed in the structural diversity of the microbiome. There was an increasing tendency of beneficial bacteria (Bacteroidales) and a decreasing tendency of harmful bacteria (Firmicutes) in the recovery phase of mild AP (MAP). However, in the recovery phase of moderately severe AP (MSAP) and severe AP, Enterococcus abundance increased compared with that in the acute phase. Some signalling pathways showed opposite trends in the recovery phase of MAP and MSAP compared to the acute phase. These results suggested that gut microbiome composition and function are associated with AP recovery, which may inform strategies for the treatment and prognosis of AP.}, }
@article {pmid40593979, year = {2025}, author = {Chen, L and Chen, H and Lv, T and Guo, X and Wu, W and Zhao, D and Liu, F}, title = {Differences of the respiratory microbiota between children suffering from community acquired pneumonia with presence or absence of asthma.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {20458}, pmid = {40593979}, issn = {2045-2322}, mesh = {Humans ; *Asthma/microbiology/complications ; *Community-Acquired Infections/microbiology/complications ; *Microbiota ; Male ; Female ; Child ; Child, Preschool ; *Pneumonia/microbiology/complications ; Infant ; High-Throughput Nucleotide Sequencing ; Metagenomics ; Adolescent ; Community-Acquired Pneumonia ; }, abstract = {Recent advancements in respiratory microbiota research have progressively elucidated their pivotal role in pediatric respiratory pathologies. Alterations in airway microbial communities are intricately associated with diverse respiratory conditions and distinct disease states. This study conducted a comparative analysis of respiratory microecological profiles in pediatric cohorts diagnosed with community-acquired pneumonia (CAP), stratified by the presence or absence of comorbid bronchial asthma, from whom nasopharyngeal aspirates were obtained for metagenomic next-generation sequencing (mNGS). Analyses revealed comparable alpha-diversity indices between groups; however, beta-diversity metrics demonstrated marked compositional divergence. In the asthma-CAP cohort, Streptococcus pneumoniae and Rothia mucilaginosa emerged as predominant taxa, whereas Mycoplasmoides pneumoniae and Trichoderma citrinoviride dominated microbial profiles in uncomplicated CAP patients.}, }
@article {pmid40593735, year = {2025}, author = {Flores Ventura, E and Esteban-Torres, M and Gueimonde, M and van Sinderen, D and Koren, O and Hall, LJ and Segata, N and Valles-Colomer, M and Collado, MC}, title = {Mother-to-infant vertical transmission in early life: a systematic review and proportional meta-analysis of Bifidobacterium strain transmissibility.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {121}, pmid = {40593735}, issn = {2055-5008}, support = {CEX2021-001189-S-20-1//Ministerio de Ciencia e Innovaci&#xf3;n/ ; CEX2021-001189-S/ MCIN/AEI / 10.13039/501100011033//Ministerio de Ciencia e Innovaci&#xf3;n/ ; PID2022-139328OA-I00//Ministerio de Ciencia e Innovaci&#xf3;n/ ; CEX2021-001189-S/ MCIN/AEI / 10.13039/501100011033//Ministerio de Ciencia e Innovaci&#xf3;n/ ; 898088//European Union's Horizon 2020/ ; SFI/12/RC/2273-P1 and SFI/12/RC/2273-P2/SFI_/Science Foundation Ireland/Ireland ; 220876/Z/20/Z//Wellcome Trust Investigator/ ; Beatriz Galindo Junior Fellowship BG22/00172//Ministerio de Universidades/ ; 639226/ERC_/European Research Council/International ; }, mesh = {Female ; Humans ; Infant ; Infant, Newborn ; Pregnancy ; *Bifidobacteriales Infections/transmission/microbiology ; *Bifidobacterium/classification/genetics/isolation &amp; purification ; Gastrointestinal Microbiome ; *Infectious Disease Transmission, Vertical ; Metagenomics ; Mothers ; Vagina/microbiology ; }, abstract = {Early-life colonization is a critical developmental process influencing infant biological programming, with bifidobacteria playing a key role. This systematic review examines the transmissibility of Bifidobacterium strains from mothers to infants. Adhering to Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines, 31 articles from 2009 to 2024 were selected from 2825 screened titles and abstracts. Using a narrative synthesis and meta-analysis, the review focuses on studies employing strain-level metagenomic approaches (Protocol registry CRD: CRD42023490507). Ten studies using shotgun metagenomic sequencing identified specific strains of B. adolescentis, B. angulatum, B. bifidum, B. breve, B. pseudocatenulatum, B. catenulatum, and B. longum shared between mothers and infants. A meta-analysis of 810 mother-infant pairs revealed an overall species transmissibility estimate of 30% (95% CI: 0.17; 0.44), with B. longum strains persisting in infants' guts for up to 6 months. Strain transmissibility was higher in vaginally delivered infants compared to those delivered by caesarean section. This review highlights the high transmission rates of maternal Bifidobacterium strains in early-life gut seeding, particularly B. bifidum and B. longum. Despite ongoing research, uncertainties remain regarding the precise characteristics, transmission routes, and mechanisms of transmitted strains. Comprehensive approaches, including metagenomic sequencing and longitudinal studies, are needed to understand the role of vertical transmission in infant gut microbiome engraftment and its functional implications.}, }
@article {pmid40593262, year = {2025}, author = {Liu, L and Li, M and Qin, Y and Liu, Y and Li, M and Lian, B and Guo, R and Xiao, Y and Yin, C}, title = {Childhood obesity and insulin resistance is correlated with gut microbiome serum protein: an integrated metagenomic and proteomic analysis.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {21436}, pmid = {40593262}, issn = {2045-2322}, support = {81903340//National Natural Science Foundation of China/ ; }, mesh = {Child ; Female ; Humans ; Male ; *Blood Proteins/metabolism ; Feces/microbiology ; *Gastrointestinal Microbiome ; *Insulin Resistance ; Metagenomics/methods ; *Pediatric Obesity/microbiology/blood/metabolism ; Proteomics/methods ; }, abstract = {The aim of this study was to investigate the changes in the gut microbiota and proteins related to metabolism and immunity caused by childhood obesity and insulin resistance (IR) and to assess the underlying relationship between the gut microbiota and IR in children. Nineteen children with obesity and sixteen healthy children were recruited. Children with obesity were divided into two groups: obese with IR and obese without IR. All of the obese children participated in a 1-month lifestyle-based weight loss program. Faecal metagenomics and serum Olink proteomics combined with clinical parameters were used to identify the metabolic alterations associated with childhood obesity and IR. The gut microbiota and serum protein were significantly altered in obese children with IR. The relative abundances of Akkermansia muciniphila, IGFBP1 and GP6 were decreased in obese children with IR. Butyricicoccus sp. AM29-23AC, DLK1, CD163, CCL16 and CTSD levels were recovered after IR improved. TNFR1 had a significant indirect effect on the interaction between s-Citrobacter.freundii and fasting insulin. In conclusion, obese children with IR have abnormal gut microbiota and serum proteins related to metabolism and immunity, which can be improved after weight loss. The gut microbiome of children with obesity may contribute to the development of IR by triggering metabolic inflammation.Clinical Trial Registration: This study was registered with the Chinese Clinical Trial Registry (Registration number: ChiCTR2300072179).}, }
@article {pmid40593012, year = {2025}, author = {Sitko, K and Piotrowska, E and Podlacha, M and Zagórska, N and Starke, MD and Trzeciak, M and Tukaj, S}, title = {Topical application of the HSP90 inhibitor 17-AAG reduces skin inflammation and partially restores microbial balance: implications for atopic dermatitis therapy.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {21245}, pmid = {40593012}, issn = {2045-2322}, support = {2020/39/B/NZ6/00357//Polish National Science Centre (NCN)/ ; 2020/39/B/NZ6/00357//Polish National Science Centre (NCN)/ ; 2020/39/B/NZ6/00357//Polish National Science Centre (NCN)/ ; 2020/39/B/NZ6/00357//Polish National Science Centre (NCN)/ ; 2020/39/B/NZ6/00357//Polish National Science Centre (NCN)/ ; }, mesh = {*Benzoquinones/administration &amp; dosage/pharmacology ; *Lactams, Macrocyclic/administration &amp; dosage/pharmacology ; Animals ; *Dermatitis, Atopic/drug therapy/pathology/chemically induced/microbiology/metabolism ; *HSP90 Heat-Shock Proteins/antagonists &amp; inhibitors/metabolism ; Mice ; Humans ; Disease Models, Animal ; Administration, Topical ; *Skin/drug effects/pathology/microbiology ; Female ; Cytokines/metabolism ; Eosinophils/drug effects/metabolism ; Gastrointestinal Microbiome/drug effects ; Staphylococcus aureus/drug effects ; Inflammation/drug therapy ; Keratinocytes/drug effects/metabolism ; }, abstract = {Heat shock proteins belonging to the HSP90 family promote inflammation and are potential therapeutic targets in inflammatory and autoimmune diseases. Here the effects of the HSP90 inhibitor 17-AAG applied topically were evaluated in a DNCB-induced murine model of atopic dermatitis (AD). The use of 17-AAG improved clinical disease activity without causing toxicity in the animals. Topical application of 17-AAG resulted in reduced epidermal hyperplasia, decreased expression of TSLP, IL-5, and IL-6, as well as reduced activation of NF-κB in the skin. In addition, the eosinophil proportion in the blood and eosinophil peroxidase (EPX) activity in the skin were significantly reduced in 17-AAG-treated AD mice. The inhibitory effects of 17-AAG on the production of epidermal alarmins, T-helper cell-associated cytokines, and ROS release were demonstrated in cultures of activated human keratinocytes, CD4[+] T lymphocytes, and eosinophils, respectively. Finally, next-generation sequencing metagenomic approaches revealed that topical application of 17-AAG partially restored the normal gut microbiome in AD mice. Moreover, 17-AAG inhibited Staphylococcus aureus biofilm formation in vitro. The findings of this study, combined with the observed increase in HSP90 and EPX activity in the leukocytes of the analyzed cohort of AD patients, support the potential therapeutic use of HSP90 inhibitors in individuals with AD.}, }
@article {pmid40592825, year = {2025}, author = {Mali, N and Mali, S and Zhang, L and Fu, P}, title = {Interplay between gut microbiota and acute kidney injury: a review of their mutual influence and causation.}, journal = {Renal failure}, volume = {47}, number = {1}, pages = {2522976}, doi = {10.1080/0886022X.2025.2522976}, pmid = {40592825}, issn = {1525-6049}, mesh = {Humans ; *Acute Kidney Injury/microbiology/immunology/physiopathology ; *Gastrointestinal Microbiome/immunology/physiology ; Kidney/physiopathology/microbiology ; Animals ; }, abstract = {It is unclear, therefore, exactly how gut microbes and renal processes communicate. Recent developments in the field of microbiome research present chances to enhance our comprehension and management of acute kidney injury (AKI). This review highlights important ideas and suggests more research while giving a general summary of the microbiome's influence on kidney function and AKI. AKI is a complex condition that develops through a variety of pathways. Recent experimental research has highlighted the important role that the gut microbiota plays in the course of AKI. Our understanding of human biology has been completely transformed by the current increase in gut microbiota research. Amazing progress in DNA sequencing analysis, especially in the areas of metagenomics and metatranscriptomics, has greatly increased our ability to measure and track complex microbial populations. As such, we are now in a better position to look at how these communities affect human health and illness. As a result, the relationships between renal physiology and pathophysiology and the gut microbiota are now better understood. Both experimental AKI and chronic renal illness have been linked to changes in the intestinal microbiome. This succinct review attempts to examine our present knowledge of the immune-modulatory effects of the gut microbiota, how kidney disorders are influenced by it, and the possible reciprocal interaction between kidney diseases and the microbiota. Subsequent investigations ought to concentrate on delving deeper into the function of the gut microbiota in renal disorders and finding possible therapeutic strategies for adjusting it.}, }
@article {pmid40497681, year = {2025}, author = {Fan, Y and Li, Y and Wang, L and Zhao, D and Zhou, Y and Houpt, ER and Liu, J}, title = {Fecal microbiome profiling of children with Shigella diarrhea from low- and middle-income countries.}, journal = {Microbiology spectrum}, volume = {13}, number = {7}, pages = {e0057325}, pmid = {40497681}, issn = {2165-0497}, support = {OPP1019093//Bill and Melinda Gates Foundation/ ; }, mesh = {Humans ; *Feces/microbiology ; *Shigella/genetics/isolation &amp; purification/pathogenicity/classification ; *Dysentery, Bacillary/microbiology/diagnosis ; Child, Preschool ; *Diarrhea/microbiology ; Infant ; Virulence Factors/genetics ; Female ; Male ; *Gastrointestinal Microbiome ; Child ; Developing Countries ; }, abstract = {Shigella is one of the leading pathogens causing diarrhea in children globally. Stool culture remains the standard for diagnosing Shigella infections; however, quantitative PCR (qPCR) offers greater sensitivity. In this study, we evaluated the fecal microbiomes of 27 diarrheal children with and without Shigella identified by culture and quantitative PCR, respectively, aiming to characterize the fecal microbiome profiles of children with Shigella diarrhea and to explore the differences in microbiome and the mechanisms associated with the culturability of Shigella. Our results showed that Shigella qPCR positive cases were characterized by a significantly higher abundance of Shigella and other Proteobacteria, alongside a lower abundance of the probiotic genus Bifidobacterium. This profile was associated with specific virulence factors (VFGs) and antimicrobial resistance genes (ARGs), indicating a unique pathogenic module related to Shigella infection. While no significant difference in Shigella abundance was found between the Shigella culture positive and culture negative groups, genera Bifidobacterium and Ligilactobacillus were enriched in the culture positive group. Interestingly, the culture positive group also possessed a higher abundance of virulence factors associated with pathogenicity, likely resulting from the higher copy number of pINV plasmid. The fecal metagenomic analyses from diarrheal children suggested a potentially distinct intestinal microbial profile associated with Shigella infection and a possible correlation between increased pathogenicity and the Shigella culturability. These findings might contribute to a more comprehensive understanding of Shigella pathogenicity and improving diagnostic methods for Shigella.IMPORTANCEDiarrhea represents the fifth leading cause of mortality among children under the age of five, with Shigella representing the second most common pathogen responsible for diarrhea-related mortality. In the current study, we employed metagenomics to comprehensively characterize the fecal microbiome profiles of children infected with Shigella and to investigate the factors affecting Shigella culturability. We identified a distinct intestinal microbial profile associated with Shigella-infected diarrheal children, observed a correlation between increased pathogenicity and the Shigella culturability, and also proposed some potential factors that might promote the in vitro growth of Shigella strains. These findings might provide evidence for improving diagnostic methods for Shigella.}, }
@article {pmid40494644, year = {2025}, author = {Ma, R and Shi, Y and Wu, W and Huang, C and Xue, F and Hou, R and Zhou, Y and Gu, J and Feng, F and Yu, X and Liu, J and Li, Z and Zhang, L and Lan, G and Chen, C and Bi, W and Song, X and Fu, M and Yang, H and Gu, H and Yang, J and Qi, D}, title = {The bacterial diversity and potential pathogenic risks of giant panda-infesting ticks.}, journal = {Microbiology spectrum}, volume = {13}, number = {7}, pages = {e0219724}, pmid = {40494644}, issn = {2165-0497}, support = {U21A20193//National Natural Science Foundation of China/ ; 32400405//National Natural Science Foundation of China/ ; 2023NSFSC1156//Sichuan Science and Technology Program/ ; 2024NSFSC0023//Sichuan Science and Technology Program/ ; 2023-YF09-00017-SN//Chengdu Science and Technology Bureau/ ; 2024CPB-A23, 2024CPB-Y05, CAZG2025C13//Chengdu Giant Panda Breeding Research Foundation/ ; }, mesh = {Animals ; *Ursidae/parasitology/microbiology ; Female ; *Bacteria/genetics/classification/isolation &amp; purification/pathogenicity/drug effects ; RNA, Ribosomal, 16S/genetics ; Male ; *Ticks/microbiology ; *Tick Infestations/veterinary/parasitology/microbiology ; Seasons ; Metagenomics ; Anti-Bacterial Agents/pharmacology ; Microbiota ; }, abstract = {UNLABELLED: As common parasites in the wild, ticks significantly limit the population growth of wild giant pandas and hinder the process of reintroducing captive giant pandas into their natural habitats. Research on microbial communities and pathogens in ticks infesting giant pandas is limited, emphasizing the need for a comprehensive investigation. To thoroughly investigate the microbial communities in giant panda-infesting ticks, particularly potential pathogens, we analyzed 246 ticks collected from the ears of wild-living giant pandas using 16S rRNA and metagenomic sequencing. We found that the microbial diversity in female ticks was significantly enriched in summer. The microbial community structure carried by ticks is more significantly influenced by seasonal changes than by sex. Metagenomic results indicated that giant pandas have a higher risk of Coxiella burnetii infection in summer and a higher risk of Anaplasma phagocytophilum, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Rickettsia amblyommatis infections in autumn. Over 90% of the ticks carried pathogens, with 82.54% harboring a single potentially pathogenic symbiont and the remaining 17.46% carrying multiple pathogens, all involving Coxiella burnetii. Using the CARD database, we identified a total of 121 antibiotic resistance genes (ARGs), with 76% exhibiting antibiotic efflux mechanisms. Based on the significantly associated ARGs, we provided antibiotic treatment recommendations for infections potentially caused by pathogenic symbionts. This study provides a clear answer to the potential microbial pathogen risks of ticks infesting giant pandas and offers a framework for tick-borne diseases in reintroduced wild panda populations.<br><br>IMPORTANCE: Importance: The emergence of tick-borne bacterial diseases poses a serious threat to the population health of wild-living giant pandas. Ticks are obligate hematophagous ectoparasites that survive by feeding on the blood of various animal hosts and spreading pathogens. Although some previous studies have confirmed that wild ticks carried various viruses, the role of wild giant panda-infesting ticks in the bacterial community remains unknown. Here, the identification of the microbial community and antibiotic resistome in giant panda-infesting ticks revealed that most Ixodes ovatus ticks are potentially pathogenic symbionts, including Anaplasma phagocytophilum, Coxiella burnetii, and Rickettsia amblyommatis. Tick-borne disease control also needs to take into account the effects of season, sex, and antibiotic efflux resistance genes. Our findings highlight the contribution of the scientific management of tick-borne diseases in the giant panda population.}, }
@article {pmid40488467, year = {2025}, author = {Liu, Y and Qiu, Q and Chen, Y and Deng, Y and Huang, W and Sun, C and Shang, X and Chen, X and Wang, C and Han, L and Chen, S and Yuan, J and Xu, F and Yang, Z and Fang, X and Huang, L}, title = {Integrated multi-omics analysis reveals the functional signature of microbes and metabolomics in pre-diabetes individuals.}, journal = {Microbiology spectrum}, volume = {13}, number = {7}, pages = {e0145924}, pmid = {40488467}, issn = {2165-0497}, support = {2024YFC3506300, 2024YFC3506303//National Key R&amp;D Program of China/ ; }, mesh = {Humans ; *Prediabetic State/microbiology/metabolism ; *Metabolomics/methods ; *Gastrointestinal Microbiome/genetics ; Male ; Diabetes Mellitus, Type 2/microbiology/metabolism ; Female ; Middle Aged ; Adult ; RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenome ; Blood Glucose ; Multiomics ; }, abstract = {Pre-diabetes (PD) represents a critical stage in the progression toward type 2 diabetes, with significant alterations observed in the human microbial community among pre-diabetic individuals in observational studies. However, understanding the interaction between human microbiota and the host during pre-diabetes remains limited. Therefore, this study aims to understand the alterations in the human microbial community during pre-diabetes, a critical stage toward type 2 diabetes. Using an integrated analysis of human microbiota and metabolomics data, we seek to identify the functional signature associated with PD and gain insights into potential mechanisms driving its progression to type 2 diabetes. These findings could inform the development of early intervention strategies for those at high risk. Samples were collected from pre-diabetes, diabetes, and healthy control groups. Through metagenome and 16S rRNA sequencing, we analyzed the gut microbial and tongue coating compositions, respectively. Untargeted metabolomics techniques were also applied for comprehensive plasma data. Using integrated multi-omics analysis, we aim to understand the metabolic potentials of the human microbiome, its molecular links with host targets, and their effects on pre-diabetes, thereby deepening our understanding of microbiome-host interactions in this context. The pre-diabetes group exhibited distinct clinical characteristics, particularly in blood glucose levels and a higher average level of γ-glutamyl transferase. We identified 509 intestinal bacterial species, with Megamonas funiformis and Parabacteroides merdae showing higher abundance in the PD group. In tongue coating samples, we found 1,122 bacterial genera, with the PD group showing altered levels of Corynebacterium and Johnsonella. Furthermore, we detected 795 metabolites, primarily involved in carbohydrate and lipid metabolism. Importantly, our integrated multi-omics analysis suggested Flavonifractor plautii's role in modulating blood glucose through influencing carbohydrate metabolism. Our integrated multi-omics analysis revealed significant alterations in several regulatory pathways associated with pre-diabetes, particularly emphasizing the impact of gut bacterium Flavonifractor plautii on blood glucose levels through its influence on carbohydrate metabolism. These intricate relationships among gut microbiota, metabolites, and blood glucose levels underscore the significance of personalized treatment approaches and preventive strategies for pre-diabetes. The insights gained from this research hold considerable promise for advancing our understanding and management of pre-diabetes.IMPORTANCEThis study investigates alterations in the human microbial community during PD, a critical stage leading to type 2 diabetes. Through integrated analysis of metagenomic and metabolomics data from pre-diabetes, diabetes, and healthy control groups, we identified distinct clinical characteristics in the PD group, including elevated blood glucose levels and γ-glutamyl transferase. A total of 509 intestinal bacterial species were identified, with Flavonifractor plautii playing a key role in modulating blood glucose levels via its influence on carbohydrate metabolism. Our findings underscore the complex interactions among gut microbiota, metabolites, and blood glucose levels, highlighting the potential for personalized treatment approaches and early intervention strategies for individuals at high risk of developing type 2 diabetes.}, }
@article {pmid40488405, year = {2025}, author = {Ricci, F and Leung, PM and Hutchinson, T and Nguyen-Dinh, T and Frank, AH and Hood, AVS and Salazar, VW and Eate, V and Wong, WW and Cook, PLM and Greening, C and McClelland, H}, title = {Chemosynthesis enhances net primary production and nutrient cycling in a hypersaline microbial mat.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, doi = {10.1093/ismejo/wraf117}, pmid = {40488405}, issn = {1751-7370}, mesh = {*Archaea/metabolism/genetics/classification ; *Bacteria/metabolism/genetics/classification ; Carbon Cycle ; *Lakes/microbiology ; Photosynthesis ; Oxidation-Reduction ; Hydrogen/metabolism ; *Microbiota ; Phototrophic Processes ; *Nutrients/metabolism ; }, abstract = {Photosynthetic microbial mats are macroscopic microbial ecosystems consisting of a wide array of functional groups and microenvironments arranged along variable redox gradients. Light energy ultimately drives primary production and a cascade of daisy-chained metabolisms. Heterotrophic members of these communities remineralise organic material, decreasing net primary production, and returning nutrients to the aqueous phase. However, reduced inorganic and one-carbon substrates such as trace gases and those released as metabolic byproducts in deeper anoxic regions of the mat, could theoretically also fuel carbon fixation, mitigating carbon loss from heterotrophy and enhancing net primary production. Here, we investigated the intricate metabolic synergies that sustain community nutrient webs in a biomineralising microbial mat from a hypersaline lake. We recovered 331 genomes spanning 40 bacterial and archaeal phyla that influence the biogeochemistry of these ecosystems. Phototrophy is a major metabolism found in 17% of the genomes, but over 50% encode enzymes to harness energy from inorganic substrates and 12% co-encode chemosynthetic carbon fixation pathways that use sulfide and hydrogen as electron donors. We experimentally demonstrated that the microbial community oxidises ferrous iron, ammonia, sulfide, and reduced trace gas substrates aerobically and anaerobically. Furthermore, carbon isotope assays revealed that diverse chemosynthetic pathways contribute significantly to carbon fixation and organic matter production alongside photosynthesis. Chemosynthesis in microbial mats results from a complex suite of spatially organised metabolic interactions and continuous nutrient cycling, which decouples carbon fixation from the diurnal cycle, and enhances the net primary production of these highly efficient ecosystems.}, }
@article {pmid40407311, year = {2025}, author = {Li, H and Wang, Z and He, S and Zhao, X and Wu, Q and Sun, Y and Fan, Y and Hu, X and Tian, Z and Zhang, S}, title = {Unraveling gut microbiome alterations and metabolic signatures in hereditary transthyretin amyloidosis.}, journal = {Microbiology spectrum}, volume = {13}, number = {7}, pages = {e0230224}, pmid = {40407311}, issn = {2165-0497}, support = {20220484031//Beijing Nova Program/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Cross-Sectional Studies ; Male ; Female ; Middle Aged ; *Amyloid Neuropathies, Familial/microbiology/metabolism ; Aged ; *Metabolome ; Taurine/blood/metabolism ; gamma-Aminobutyric Acid/blood ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Glutamic Acid/metabolism ; Adult ; Metagenomics ; }, abstract = {UNLABELLED: Hereditary transthyretin amyloidosis (hATTR) is a rare, often fatal disease characterized by the abnormal aggregation of atypical transthyretin fibrils. Given the variability in the penetrance and clinical manifestations of hATTR, the role of nongenetic factors, particularly those related to the gut microbiota, warrants investigation. We conducted a cross-sectional study, examining the untargeted serum metabolome and gut metagenome in 13 patients with hATTR and 22 healthy controls. Significant disparities were observed in both the serum metabolome and gut microbiome of individuals with hATTR when compared to healthy controls. Notably, the serum levels of gamma-aminobutyric acid (GABA) and taurine were markedly decreased in the hATTR group, with the most pronounced reduction in those exhibiting hATTR-related cardiac amyloidosis. Additionally, commensals such as Bifidobacterium pseudocatenulatum, Lactobacillus rogosae, and Hungatella hathewayi were significantly diminished in hATTR patients and were positively correlated with the metabolite module containing GABA and taurine. Metagenomic and metabolomic pathway enrichment analyses collectively revealed disruptions in glutamate and taurine metabolism in hATTR. Our findings imply that patients with hATTR may exhibit metabolic irregularities in glutamate and taurine, potentially associated with an imbalance in the gut microbiota.<br><br>IMPORTANCE: Hereditary transthyretin amyloidosis (hATTR) is influenced not only by genetic factors but also by environmental or host factors during its onset and progression. Previous studies have independently examined the metabolome or gut microbiome in hATTR, but the interplay between the microbiota and metabolism under this condition remains largely unknown. Our cross-sectional study represents the first comprehensive integration of gut metagenome and serum metabolome analyses in hATTR patients. We observed disturbances in glutamate and taurine metabolism among these patients, which correlated with distinctive shifts in the gut microbiota. This study offers insights into the intricate dynamics among gut dysbiosis, metabolic imbalances, and the progression of hATTR, suggesting directions for future research into the underlying mechanisms and therapeutic strategies.}, }
@article {pmid40151093, year = {2025}, author = {Liu, D and Zhang, W and Zhu, L and Gong, J and Huang, Y and Li, Z and He, J}, title = {Autoinducer-2 Quorum Sensing Is an Active Universal Signaling System in Sociomicrobiology.}, journal = {Journal of basic microbiology}, volume = {65}, number = {7}, pages = {e70024}, doi = {10.1002/jobm.70024}, pmid = {40151093}, issn = {1521-4028}, support = {//This study was supported by National Natural Science Foundation of China (grants 32371495 and 32171424), Hubei Province Technology Innovation Plan Project (2024BCB028), and Wuhan Science and Technology Major Project (grant 2023020302020708)./ ; }, mesh = {*Quorum Sensing/physiology ; *Homoserine/analogs &amp; derivatives/metabolism ; *Lactones/metabolism ; Humans ; *Signal Transduction ; Bacterial Proteins/metabolism/genetics ; *Bacteria/metabolism/genetics/classification ; Gastrointestinal Microbiome ; Metagenomics ; }, abstract = {Autoinducer-2 (AI-2) is a bacterial quorum sensing (QS) signaling molecule that regulates inter-specific and intraspecific bacterial communication in complex ecological environments. Here, we systematically analyzed the distribution of AI-2 QS-related proteins (synthases and receptors) in the domain bacteria, explored the evolution and development of AI-2 receptors, and analyzed the AI-2 regulatory networks using human intestinal metagenomic data. The results show that AI-2 QS-related proteins are distributed in 17 bacterial phyla, accounting for approximately 36.80% of the total genomes. Based on the ability of bacteria to synthesize and receive AI-2 signals, we divided bacteria into four major categories, namely Prosumer, Producer, Monitor, and Immunizer. The Gram-positive bacteria are mainly responsible for producing the AI-2 signals, while Gram-negative bacteria are more likely to respond to AI-2. Evolutionary analysis shows that the AI-2 receptor CahR is mainly derived from the methyl-accepting chemotaxis protein (MCP). Based on the length difference of the ligand-binding domains, we further speculate that AI-2 binding activates CahR through either allostery or aggregation mode. Using human intestinal metagenomic data, we found a strong correlation between AI-2 signaling and c-di-GMP signaling. These findings will have an important impact on the AI-2 QS research and accelerate its development.}, }
@article {pmid40015361, year = {2025}, author = {Liu, W and Geng, Y and Wang, Y and Zhao, J and Fan, Y and Zhang, X and Xie, W and Zhang, L and Zhang, Z}, title = {Evolution of gut microbiota in psoriatic arthritis treated with IL-17 inhibitor revealed by metagenomics.}, journal = {Joint bone spine}, volume = {92}, number = {4}, pages = {105868}, doi = {10.1016/j.jbspin.2025.105868}, pmid = {40015361}, issn = {1778-7254}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/genetics ; Male ; *Metagenomics/methods ; Female ; Middle Aged ; *Arthritis, Psoriatic/drug therapy/microbiology/diagnosis ; *Interleukin-17/antagonists &amp; inhibitors ; *Antibodies, Monoclonal, Humanized/therapeutic use ; Feces/microbiology ; Treatment Outcome ; Adult ; Aged ; }, abstract = {OBJECTIVES: To explore the evolution of gut microbiota in taxonomy and function in PsA patients during IL-17i treatment.<br><br>METHODS: Twenty PsA patients treated with secukizumab were included. Fecal samples were collected before treatment (0 mo.), first month (1 mo.) and third month (3 mo.) after treatment, and a total of 60 samples were collected. Shotgun metagenomic sequencing was used to detect all fecal samples.<br><br>RESULTS: In the 1 mo. and 3 mo. after IL-17i treatment, the disease activity in PsA patients decreased significantly. Compared with 0 mo., &#x3b1;-diversity calculated by Shannon index and Pielou index increased significantly at 1 mo. and 3 mo. after treatment. Microbial genes encoding Carbohydrate-Active enZymes (CAZymes) tended to be upregulated after treatment. After treatment, Bacteroidota phylum expanded, especially the abundance of Phocaeicola genus increased gradually with the treatment time (P<0.05). The abundance of Phocaeicola genus was positively correlated with the &#x3b1;-diversity. The Polysaccharide Lyases and Carbohydrate Esterases in CAZymes were significantly positively correlated with most of species in Phocaeicola genus.<br><br>CONCLUSIONS: Treatment with IL-17i induces gut microbiota evolution in PsA patients. The key features of this evolution include increased &#x3b1;-diversity, expansion of the Phocaeicola genus, and upregulation of CAZymes. Species within the Phocaeicola genus may be the critical bacteria driving this evolution.}, }
@article {pmid40591379, year = {2025}, author = {Orenburkina, OI and Rezbaeva, GN and Dudurich, VV and Babushkin, AE and Sogomonian, KS and Danilova, AA and Danilov, LG}, title = {[Microbiota of the ocular surface in children with myopia].}, journal = {Vestnik oftalmologii}, volume = {141}, number = {3}, pages = {5-12}, doi = {10.17116/oftalma20251410315}, pmid = {40591379}, issn = {0042-465X}, mesh = {Humans ; Child ; *Myopia/diagnosis/microbiology/physiopathology ; Male ; Female ; Adolescent ; *Microbiota ; *Conjunctiva/microbiology ; *Bacteria/genetics/isolation &amp; purification/classification ; RNA, Ribosomal, 16S/genetics ; Disease Progression ; }, abstract = {UNLABELLED: A healthy ocular surface is characterized by relatively stable and comparatively low microbial diversity. However, pathological conditions can provoke shifts in the composition of bacterial taxa, which may be associated, among other factors, with the progression of myopia.<br><br>PURPOSE: This study compared the taxonomic diversity of the conjunctival microbiota in children with varying degrees of myopia and those without clinically confirmed myopia.<br><br>MATERIAL AND METHODS: Ocular surface samples were obtained from 29 children aged 6-17 years with myopia (58 eyes) and from 12 children of the control group aged 9-17 years (24 eyes). The taxonomic composition of the conjunctival microbiota was analyzed using 16S ribosomal RNA gene (rRNA) sequencing, followed by microbiome profiling through bioinformatics and statistical tools.<br><br>RESULTS: The ocular surface microbiota in children with myopia demonstrated higher alpha diversity compared to the control group. This was confirmed by values of the Chao (reflecting low-abundance taxa) and Shannon (reflecting overall bacterial diversity - higher diversity means higher index; optimal value; 3.1-4.2) indices. The results revealed a clear trend toward differentiation in bacterial composition between myopic and control groups. These differences were associated with changes in the relative abundance of opportunistic bacteria depending on the degree of myopia.<br><br>CONCLUSION: The taxonomic diversity of the ocular microbiota at the genus level in patients with varying degrees of myopia was characterized by a higher number of taxonomic units compared to the control group. The general trend is an increase in the biodiversity of the bacterial composition due to an increase in the relative representation of opportunistic microorganisms. Further research on the influence of the ocular microbiota on the progression of myopia is needed.}, }
@article {pmid40589860, year = {2025}, author = {Nimnoi, P and Pongsilp, N}, title = {Insights into the metagenomic and metabolomic compositions of the bacterial communities in Thai traditional fermented foods as well as the relationships between food nutrition and food microbiomes.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19606}, pmid = {40589860}, issn = {2167-8359}, mesh = {*Fermented Foods/microbiology ; Thailand ; *Food Microbiology ; *Bacteria/genetics/classification/metabolism ; *Microbiota ; Metagenomics ; Metabolomics ; Fermentation ; }, abstract = {Five Thai traditional fermented foods, including khao-mak (sweet fermented sticky rice), pak-kard-dong (sour salt-fermented mustard greens), nor-mai-dong (sour salt-fermented bamboo sprouts), moo-som (sour salt-fermented pork), and pla-som (sour salt-fermented fish), were analyzed for their food nutrition and bacterial community structures. Sour salt-fermented bamboo sprouts possessed the highest unique amplicon sequence variables (ASVs), which were 3,476, as well as the highest bacterial diversity and richness, while in contrast, sweet fermented sticky rice possessed the lowest such indices. The phylum Firmicutes accounted for the largest proportions in both sour salt-fermented meats and sweet fermented sticky rice whereas the Proteobacteria occupied the largest proportions in both sour salt-fermented vegetables. The bacterial community structures of both sour salt-fermented meats were similar in terms of composition at class level, while the dominant genera compositions were totally different among all foods. Gene functions, enzymes, and metabolic pathways annotated from the bacterial communities in all foods were those involved in growth metabolisms, genetic information processing, environmental information processing, and cellular signaling. Sour salt-fermented bamboo sprouts had the highest numbers of unique annotated genes, enzymes, and metabolic pathways.}, }
@article {pmid40586794, year = {2025}, author = {Chadd, EF and Ergunay, K and Kumsa, B and Bourke, BP and Broomfield, BS and Long, LS and Linton, YM}, title = {Nanopore sequencing reveals a diversity of microorganisms in ticks from Ethiopia.}, journal = {Parasitology research}, volume = {124}, number = {7}, pages = {73}, pmid = {40586794}, issn = {1432-1955}, support = {FY23 Award # 23-101//Deployed Warfighter Protection (DWFP) Program/ ; Award # P0031_21_WR//Armed Forces Health Surveillance Division/ ; }, mesh = {Animals ; Ethiopia ; *Nanopore Sequencing ; Metagenomics ; *Bacteria/genetics/classification/isolation &amp; purification ; *Ticks/microbiology ; Rickettsia/genetics/isolation &amp; purification ; *Viruses/classification/genetics/isolation &amp; purification ; Metagenome ; Phylogeny ; *Biodiversity ; }, abstract = {Ethiopia is home to a diverse group of ixodid ticks that are known to transmit disease to both animals and humans. Recent advances in metagenome sequencing show there is more microorganism diversity found in ticks than previously known. Compared to amplicon-based gene identification methods, agnostic metagenomic sequencing provides broader insights into the diversity of microorganisms in ticks, providing knowledge that will better enable public health measures in preventing the spread of zoonotic disease. In the present study, metagenomic sequencing was used to look at the microbial diversity of ticks collected from livestock in Ethiopia. This study identified six bacterial genera (Coxiella, Francisella, spotted-fever group (SFG) Rickettsia, Spiroplasma, Ehrlichia, and Borrelia), one genus of eukaryotic parasite (Babesia sp.), and one virus species (Parapoxvirus bovinestomatitis) from 154 tick pools representing 22 species of ticks among four genera (Amblyomma, Haemaphysalis, Hyalomma, and Rhipicephalus). We were able to differentiate between pathogenic and nonpathogenic microorganisms, highlighting concerns among traditional gene-targeted screening methods. Among all pooled samples, the predominant microorganisms included Coxiella-like endosymbionts (55.2%), SFG Rickettsia (38.3%), and nonpathogenic Francisella spp. (26.0%). Rickettsia africae was the predominant pathogenic agent detected, and phylogenetic analysis of two samples from A. gemma and A. variegatum confirmed the presence of R. africae. This study highlights the power of metagenomics applied to potential vectors of zoonotic disease, and it expands the knowledge on tick-pathogen associations in Ethiopia.}, }
@article {pmid40585302, year = {2025}, author = {Louca, S}, title = {Machine learning models for delineating marine microbial taxa.}, journal = {NAR genomics and bioinformatics}, volume = {7}, number = {2}, pages = {lqaf090}, pmid = {40585302}, issn = {2631-9268}, mesh = {*Machine Learning ; *Archaea/genetics/classification ; *Bacteria/genetics/classification ; Metagenome ; Phylogeny ; Genome, Bacterial ; *Aquatic Organisms/genetics/classification ; }, abstract = {The relationship between gene content differences and microbial taxonomic divergence remains poorly understood, and algorithms for delineating novel microbial taxa above genus level based on multiple genome similarity metrics are lacking. Addressing these gaps is important for macroevolutionary theory, biodiversity assessments, and discovery of novel taxa in metagenomes. Here, I develop machine learning classifier models, based on multiple genome similarity metrics, to determine whether any two marine bacterial and archaeal (prokaryotic) metagenome-assembled genomes (MAGs) belong to the same taxon, from the genus up to the phylum levels. Metrics include average amino acid and nucleotide identities, and fractions of shared genes within various categories, applied to 14 390 previously published non-redundant MAGs. At all taxonomic levels, the balanced accuracy (average of the true-positive and true-negative rate) of classifiers exceeded 92%, suggesting that simple genome similarity metrics serve as good taxon differentiators. Predictor selection and sensitivity analyses revealed gene categories, e.g. those involved in metabolism of cofactors and vitamins, particularly correlated to taxon divergence. Predicted taxon delineations were further used to de novo enumerate marine prokaryotic taxa. Statistical analyses of those enumerations suggest that over half of extant marine prokaryotic phyla, classes, and orders have already been recovered by genome-resolved metagenomic surveys.}, }
@article {pmid40580323, year = {2025}, author = {Callejas, C and Guerrero, L and Erijman, L and López, I and Borzacconi, L}, title = {Microbiota and methanogenic activities in an anaerobic internal circulation reactor: insights into biogas production from brewery wastewater.}, journal = {Biodegradation}, volume = {36}, number = {4}, pages = {56}, pmid = {40580323}, issn = {1572-9729}, support = {2019//Comisi&#xf3;n Sectorial de Investigaci&#xf3;n Cient&#xed;fica/ ; 2019//Comisi&#xf3;n Sectorial de Investigaci&#xf3;n Cient&#xed;fica/ ; 2019//Comisi&#xf3;n Sectorial de Investigaci&#xf3;n Cient&#xed;fica/ ; }, mesh = {*Bioreactors/microbiology ; *Methane/metabolism ; *Microbiota ; *Biofuels/microbiology ; *Wastewater/microbiology ; Anaerobiosis ; Archaea/metabolism/genetics/classification ; Bacteria/metabolism/genetics/classification ; RNA, Ribosomal, 16S/genetics ; Sewage/microbiology ; }, abstract = {In this study, we analyzed the prokaryotic community and methanogenic activities in sludge samples collected from a full-scale internal circulation (IC) reactor used to treat brewery wastewater. The reactor performance was monitored over 15 months, and specific methanogenic activities were periodically measured in fresh sludge samples using CO2/H2 or acetate as substrates. The maximum hydrogenotrophic activities were consistently higher than maximum acetoclastic activities, suggesting the relevance of hydrogenotrophic methanogens in the sludge. Over six months, the prokaryotic community present in four sludge samples was analyzed using amplicon libraries and metagenomics. V4-16S rRNA amplicon libraries revealed the presence of a diverse microbial community dominated by Firmicutes and Bacteroidetes among bacterial phyla, and Halobacterota and Euryarchaeota among archaea. Furthermore, the 16S libraries constructed with cDNA were consistent with the methanogenic activity assays. A genome-centric metagenomics approach was used to assemble 42 high-quality metagenome-assembled genomes (MAGs), among which Methanothrix and Methanobacterium were the dominant archaeal members, and Acidobacteriota, Synergistota, Krumholzibacteriota, and Nitrospirota phyla were among the bacteria. Potential acetogenic members were explored via the fths gene; 15 MAGs contained this marker gene. A combination of methanogenic activity tests, amplicon libraries, and MAG analysis was used to gain insights into the prokaryotic structure and functional potential of the microbial community driving methane production in the reactor.}, }
@article {pmid40580234, year = {2025}, author = {Biessy, L and Sissons, J and Kihika, JK and Wood, SA and Pearman, JK}, title = {Microbial adaptations to acidic, nutrient- and metal-rich lakes in Aotearoa New Zealand.}, journal = {Extremophiles : life under extreme conditions}, volume = {29}, number = {2}, pages = {24}, pmid = {40580234}, issn = {1433-4909}, mesh = {*Lakes/microbiology/chemistry ; New Zealand ; *Microbiota ; *Adaptation, Physiological ; Geologic Sediments/microbiology ; *Metals/analysis ; Nutrients/analysis ; Bacteria/genetics/metabolism ; }, abstract = {Four lakes in the same region of Aotearoa New Zealand were investigated to characterize sediment microbial communities and functions under contrasting environmental conditions. Two lakes, an acidic lake (Rototai) and a lake with elevated metals and nutrients (Killarney) were impacted by extreme stressors, while the lowland mesotrophic lake (Kaihoka East) and an alpine lake (Peel) were used as reference lakes. Using metabarcoding and metagenomics analysis, we profiled community composition, functional pathways, and resistance mechanisms in the lake sediments. Rototai contained high abundances of genes involved in sulfur cycling (assimilatory and dissimilatory sulfate reduction, sulfur oxidation) and acid tolerance (kdp potassium-transport system, ClcA antiporters). In contrast, Killarney had elevated abundances of genes involved in methanogenesis, however despite high metal concentrations, no enrichment of metal-resistance genes was detected. Kaihoka East contained the highest prokaryotic diversity and an elevated abundance of genes involved in nitrification. Although community taxonomic differences were modest across lakes, functional analyses revealed distinct metabolic adaptations. These findings highlight the utility of using metagenomic approaches to identify biogeochemical processes and stress-response strategies in lakes. Improved understanding of microbial functional diversity in surface sediments has implications for lake management, particularly in systems impacted by acidification, high nutrient loading, and metal contamination.}, }
@article {pmid40575481, year = {2025}, author = {Chen, L and Li, Z and Yuan, D and Chen, Y and Xu, Y and Tang, W and Liu, C}, title = {Microorganism changes in the gut of Apis mellifera surviving for the long term in Camellia oleifera forests.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1608835}, pmid = {40575481}, issn = {2235-2988}, mesh = {Animals ; Bees/microbiology ; *Camellia ; *Gastrointestinal Microbiome ; Oligosaccharides/metabolism ; Forests ; Metabolomics ; Metagenomics ; *Gastrointestinal Tract/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; }, abstract = {Alpha-galactosides (oligosaccharides) in C. oleifera nectar and pollen cause honey bee larval rot and worker bloats. Honey bee colonies surviving in C. oleifera forests for a long period have low rates of larval rot and worker bloats; however, the mechanism of oligosaccharide metabolism is unclear. In this study, we used metagenomics and metabolomics to investigate the structure and function of the gut flora and the digestion characteristics of oligosaccharides in the gut of A. mellifera foragers (CN group) that had been in the C. oleifera forest for a long period (continuously for 14 years), and those that had not been pollinated with C. oleifera (N group) after 24 h of consumption of C. oleifera honey. The results revealed that the abundance of Gilliamella apicola up to 24.08%, which can metabolize α-galactoside (α-Gal), was significantly higher (P < 0.05) in the gut of foragers in the CN group than in the N group. Additionally, the gut flora of foragers in the CN group carried a significantly higher (P < 0.05) abundance of genes encoding α-galactosidase (Glycoside hydrolase family 4, GH4) than the N group. Similarly, metabolomic results indicated that the three toxic oligosaccharides in C. oleifera honey were lower in the gut of CN group foragers. These results suggest that the gut flora of A. mellifera, which inhabits oil tea forests for long periods of time, changes and adapts to the predominant ecological niche, enhancing the host's ability to metabolize toxic oligosaccharides. This important discovery provides positive guidance for the subsequent directions for breeding of A. mellifera (G. apicola enrichment and GH4 upregulation), specialized in pollinating C. oleifera.}, }
@article {pmid40523415, year = {2025}, author = {Xu, Y and Ontita, NC and Zeng, W and Huang, J and Jiang, L and Huang, X and Li, Q and Hu, P}, title = {High-efficiency nitrogen removal by cold-tolerant bacteria consortium at low temperatures.}, journal = {Bioresource technology}, volume = {434}, number = {}, pages = {132816}, doi = {10.1016/j.biortech.2025.132816}, pmid = {40523415}, issn = {1873-2976}, mesh = {*Nitrogen/isolation &amp; purification/metabolism ; *Cold Temperature ; Wastewater/chemistry ; *Bacteria/metabolism/genetics ; *Microbial Consortia/physiology ; Water Purification/methods ; }, abstract = {A cold-tolerant bacteria consortium (M2) was developed to enhance nitrogen removal efficiency in wastewater treatment processes operating at low temperatures (below 15 ℃). Bacteria consortium M2 demonstrated high removal efficiencies for nitrogen (NH4[+]-N, 97.34 %; NO3[-]-N, 97.13 %; NO2[-]-N, 59.92 %). Dominated by genera including Comamonas, Pseudomonas, and Acinetobacter, M2 produced substantial extracellular polymeric substances (EPS) and unsaturated fatty acids, which mitigated cold-induced stress. Metagenomic analysis revealed the presence of cold-shock responsive genes, including unsaturated fatty acid synthase, and cpsA, which contribute to its resilience under low-temperature conditions. Moreover, M2 enhanced both nitrogen assimilation and nitrate reduction under cold stress. These findings highlight the potential of M2 as an effective and practical strategy for improving nitrogen removal in wastewater treatment facilities during winter, thereby addressing a critical operational limitation in cold-climate regions.}, }
@article {pmid40435904, year = {2025}, author = {Liu, Z and Yan, K and Li, J and Zhang, C and Xu, D and Wang, Y and Xie, X and Li, H and Qie, J and Li, J and Dong, X and Dong, L and Cui, H}, title = {Acute appendicitis in children: Two microbial states associated with clinical indicators and severity.}, journal = {Diagnostic microbiology and infectious disease}, volume = {113}, number = {2}, pages = {116925}, doi = {10.1016/j.diagmicrobio.2025.116925}, pmid = {40435904}, issn = {1879-0070}, mesh = {Humans ; *Appendicitis/microbiology/pathology ; Child ; Male ; Female ; Child, Preschool ; Adolescent ; *Bacteria/classification/isolation &amp; purification/genetics ; Acute Disease ; Severity of Illness Index ; C-Reactive Protein/analysis ; *Microbiota ; Appendectomy ; Metagenomics ; Dysbiosis/microbiology ; }, abstract = {BACKGROUND: Acute appendicitis (AA) is one of the most common abdominal emergencies worldwide. It is associated with dysbiosis and is usually classified clinically as either simple appendicitis (SA) or complicated appendicitis (CA) . The etiology and pathogenesis of AA remain incompletely understood.<br><br>METHODS: A total of 74 pediatric intra-abdominal pus samples from appendectomy cases (aged 3-15) were collected for AA at Tianjin Children's Hospital (Feb 2022-Sep 2023). The samples were categorised into two groups based on pathological findings: SA (n = 27) and CA (n = 47). Metagenomic profiling was employed to characterized the microbial composition and function in both groups. Additionally, clinical parameters associated with the microbiota were analysed.<br><br>RESULTS: The SA group exhibited higher levels of Burkholderia, Mycobacterium, and Klebsiella, while the CA group demonstrated higher levels of Porphyromonas, Bacteroides, Fusobacterium, Prevotella, and Tannerella. Additionaly, there were significant differences in clinical parameters, including C-reactive protein (CRP), procalcitonin (PCT), fibrinogen, sodium, potassium, phosphorus, complement C3, and chloride, between two groups. Furthermore, functional profiling revealed alterations in microbial metabolism and antibiotic resistance, highlighting the complex interplay between microbial communities and host inflammatory responses in appendicitis.<br><br>CONCLUSIONS: This study identifies unique microbial and serum biomarkers and their correlates in varying severities of acute appendicitis, highlighting the role of the microbiome in the aetiology of acute appendicitis.}, }
@article {pmid40403370, year = {2025}, author = {Liang, X and Li, B and Dong, X and Zhao, X and Li, H and Ye, Y and Ma, H and Ran, S and Li, J}, title = {Impact of microplastics exposure on the reconfiguration of viral community structure and disruption of ecological functions in the digestive gland of Mytilus coruscus.}, journal = {Journal of hazardous materials}, volume = {494}, number = {}, pages = {138692}, doi = {10.1016/j.jhazmat.2025.138692}, pmid = {40403370}, issn = {1873-3336}, mesh = {*Microplastics/toxicity ; *Mytilus/virology/drug effects ; Animals ; Biofilms/drug effects ; *Water Pollutants, Chemical/toxicity ; Digestive System/virology/drug effects ; *Virome/drug effects ; *Viruses/genetics/drug effects ; }, abstract = {Microplastics (MPs) pose ecological risks by serving as viral vectors and disrupting host microbiomes. This study investigated the impact of MPs on the digestive gland virome of Mytilus coruscus through an in situ exposure experiment on Xixuan Island, Zhoushan, China, using polyethylene MPs and metagenomic sequencing. MPs biofilms were dominated by lytic viruses (> 99 %) with low diversity (Shannon index = 4.10 ± 0.39), whereas digestive glands harbored a more diverse virome (Shannon index = 7.26 ± 1.26). MPs ingestion significantly reduced virome diversity and altered viral community composition. Functional analysis showed that MPs biofilms were enriched in genes related to genetic processing, carbohydrate metabolism and membrane biogenesis, while transcription- and replication-related genes declined (P < 0.05) in digestive glands post-ingestion. MPs biofilms carried abundant antibiotic resistance genes (ARGs) and virulence factors, selectively enriching multidrug resistance genes (efrA, patB) while reducing functional viral gene abundance. Metal (Zn, Hg, As) and biocide resistance genes were prevalent in MPs biofilms but declined post-ingestion. Additionally, MPs ingestion weakened microbial network stability, potentially impairing immune regulation and metabolic homeostasis. These findings underscore MPs' role in shaping viral communities and spreading resistance genes, heightening ecological risks in marine environments.}, }
@article {pmid40378749, year = {2025}, author = {Yu, YL and Lin, WH and Surampalli, RY and Chen, SC and Kao, CM}, title = {Adaptive fluoride removal across concentration scales: Potential roles of microbial and acicular gypsum interactions in nitrogen and phosphate cycling.}, journal = {Journal of hazardous materials}, volume = {494}, number = {}, pages = {138628}, doi = {10.1016/j.jhazmat.2025.138628}, pmid = {40378749}, issn = {1873-3336}, mesh = {*Calcium Sulfate/chemistry ; *Fluorides/chemistry ; *Phosphates/metabolism/chemistry ; *Nitrogen/metabolism/chemistry ; *Water Pollutants, Chemical/chemistry/metabolism ; Groundwater/chemistry ; Microbiota ; Bacteria/metabolism/genetics ; }, abstract = {Fluoride contamination in groundwater is a critical environmental and public health concern. Traditional remediation methods, including chemical precipitation and adsorption, are hindered by low nucleation efficiency at low fluoride concentrations and severe microbial inhibition under high fluoride stress. This study introduces an adaptive two-stage remediation system that synergistically integrates abiotic and biotic mechanisms to achieve effective fluoride removal across concentration scales. In Stage I, under elevated fluoride stress (100 mg/L), acicular gypsum (AG) facilitated abiotic calcium precipitation, effectively reducing fluoride toxicity and creating favorable conditions for microbial activity. Residual calcium released from AG further supported microbial-induced calcium precipitation (MICP) in Stage II under lower fluoride stress (10 mg/L). The system achieved a fluoride removal efficiency of 98.85 % under high fluoride conditions and demonstrated consistent performance across a broad concentration range. This integrated approach, combining abiotic and biotic mechanisms, offers a promising strategy for addressing diverse fluoride contamination scenarios. Here, phosphate (P)-mediated mineralization and microbial denitrification drive pH modulation, stabilizing fluoride as fluorapatite [Ca5(PO4)3F]. Microbial community and network analysis revealed key taxa, including Cupriavidus and Ralstonia, which facilitated P cycling and fluorapatite formation. Additionally, Bradyrhizobium enhanced nitrogen (N) cycling and supported early microbial adaptation, emphasizing the interplay of microbial interactions in driving system functionality. Functional predictions using PICRUSt2 identified genes associated with N and P cycling, highlighting the capacity of the system for nutrient adaptation under complex environmental conditions.}, }
@article {pmid40378468, year = {2025}, author = {Siddiquee, M and Cornelius, S and Seo, Y and Bullerjahn, GS and Bridgeman, TB and Sudman, M and Kang, DW}, title = {Uncovering microbial interactions in a persistent Planktothrix bloom: Towards early biomarker identification in hypereutrophic lakes.}, journal = {Water research}, volume = {283}, number = {}, pages = {123683}, doi = {10.1016/j.watres.2025.123683}, pmid = {40378468}, issn = {1879-2448}, mesh = {*Lakes/microbiology ; *Planktothrix ; Biomarkers ; Microbiota ; Nitrogen/metabolism ; Cyanobacteria ; *Harmful Algal Bloom ; RNA, Ribosomal, 16S ; }, abstract = {Cyanobacterial harmful algal blooms pose significant threats to global water supplies, ecosystems, and economies. Among the harmful cyanobacteria, Planktothrix, a resilient and toxin-producing filamentous cyanobacterium, has garnered increasing attention. However, an understanding of the entire microbiome, particularly the phycosphere surrounding Planktothrix blooms, remains largely unexplored. To the best of our knowledge, this is the first comprehensive study combining 16S rDNA and fungal internal transcribed spacer amplicon sequencing and shotgun metagenomics to elucidate Planktothrix bloom microbiomes and identify potential microbial or functional biomarkers for CyanoHABs. Our observations revealed that a summer bloom in Grand Lake St. Marys was initiated with Dolichospermum and then shifted to Planktothrix dominance. This transition was associated with nitrogen metabolism genes, suggesting that nitrogen plays a key role in bloom persistence through interactions among nitrogen-fixing bacteria, ammonia-oxidizing archaea, anammox bacteria, and denitrifiers. Additionally, metagenomic data revealed a strong positive correlation of toxin concentration with carbohydrate-nitrogen-sulfur-fatty acid associated metabolic pathways and a strong negative correlation with pollutant degradation pathways. Intriguingly, diazotrophic methane-related microbes were detected, which opens discussion on potential symbiosis that couples nitrogen and carbon metabolism. Toxin-degrading bacteria, such as Polynucleobacter and Acidovorax, were positively correlated with fungi like Vishniacozyma, proposing their cooperative roles during bloom events. Notably, Rhodobacter, a photosynthetic purple non-sulfur bacterium, showed strong negative correlations with both Planktothrix and the toxin-producing gene mcyE, positioning it as a promising biomarker for early bloom detection. Overall, this study advances the understanding of Planktothrix-dominated bloom ecology and highlights microbial signatures for proactive CyanoHAB management in freshwater systems.}, }
@article {pmid40339368, year = {2025}, author = {Zhang, X and Liu, T and Sun, W and Zhang, C and Jiang, X and You, X and Wang, X}, title = {The fate and ecological risk of typical diamide insecticides in soil ecosystems under repeated application.}, journal = {Journal of hazardous materials}, volume = {494}, number = {}, pages = {138440}, doi = {10.1016/j.jhazmat.2025.138440}, pmid = {40339368}, issn = {1873-3336}, mesh = {*Insecticides/toxicity ; *Soil Microbiology ; *Soil Pollutants/toxicity/analysis ; *ortho-Aminobenzoates/toxicity ; Ecosystem ; Soil/chemistry ; Nitrogen/metabolism ; Bacteria/drug effects/genetics ; Microbiota/drug effects ; }, abstract = {Diamide insecticides are the third most widely used class of pesticides worldwide. However, the long-term impacts of repeated diamide applications on soil ecosystems remain unclear. This study investigated chlorantraniliprole (CLP) and cyantraniliprole (CYP) effects on soil ecosystems through simulated repeated exposures. Results showed both exhibited slow degradation in the soil, with repeated applications extending their persistence, particularly for CLP. Both significantly inhibited soil alkaline nitrogen and organic matter accumulation, while reducing urease and sucrase activities, with CLP exerting stronger inhibitory effects. Metagenomic analysis indicated that CLP and CYP notably reduced soil microbial diversity. Additionally, the two insecticides altered the soil microbial community structure and inhibited carbon-nitrogen metabolic pathways. Further analysis revealed that CLP treatment significantly decreased the relative abundances of Mesorhizobium and Marmoricola, whereas CYP treatment primarily reduced Clostridium_sensu_stricto_1. All of these genera exhibited significant positive correlations with key metabolic pathways in soil carbon and nitrogen cycling. Notably, the relative abundance of Sphingomonas increased significantly following CLP and CYP treatments, demonstrating potential degradation capabilities. Overall, both CLP and CYP posed ecological risks to soil ecosystems, with CLP exhibiting more severe impacts. These findings revealed the need for strengthened scientific management in actual production.}, }
@article {pmid40304704, year = {2025}, author = {Burnside, M and Tang, J and Baker, JL and Merritt, J and Kreth, J}, title = {Shining Light on Oral Biofilm Fluorescence In Situ Hybridization (FISH): Probing the Accuracy of In Situ Biogeography Studies.}, journal = {Molecular oral microbiology}, volume = {40}, number = {4}, pages = {137-146}, doi = {10.1111/omi.12494}, pmid = {40304704}, issn = {2041-1014}, support = {DE029612//NIH-NIDCR/ ; DE029492//NIH-NIDCR/ ; DE029228//NIH-NIDCR/ ; DE028252//NIH-NIDCR/ ; }, mesh = {*Biofilms ; *In Situ Hybridization, Fluorescence/methods ; *Mouth/microbiology ; Humans ; Microbiota/genetics ; Streptococcus/genetics/classification ; Species Specificity ; *Bacteria/classification/genetics ; }, abstract = {The oral biofilm has been instrumental in advancing microbial research and enhancing our understanding of oral health and disease. Recent developments in next-generation sequencing have provided detailed insights into the microbial composition of the oral microbiome, enabling species-level analyses of biofilm interactions. Fluorescence in situ hybridization (FISH) has been especially valuable for studying the spatial organization of these microbes, revealing intricate arrangements such as "corncob" structures that highlight close bacterial interactions. As more genetic sequence data become available, the specificity and accuracy of existing FISH probes used in biogeographical studies require reevaluation. This study examines the performance of commonly used species-specific FISH probes, designed to differentiate oral microbes within in situ oral biofilms, when applied in vitro to an expanded set of bacterial strains. Our findings reveal that the specificity of several FISH probes is compromised, with cross-species hybridization being more common than previously assumed. Notably, we demonstrate that biogeographical associations within in situ oral biofilms, particularly involving Streptococcus and Corynebacterium, may need to be reassessed to align with the latest metagenomic data.}, }
@article {pmid40156536, year = {2025}, author = {Sarker, S and Klukowski, N and Talukder, S and Athukorala, A and Uddin, MJ}, title = {Opportunistic sampling from the near-threatened Alexandrine parakeet uncovers genomes of a novel parvovirus and beak and feather disease virus.}, journal = {Australian veterinary journal}, volume = {103}, number = {7}, pages = {416-421}, doi = {10.1111/avj.13442}, pmid = {40156536}, issn = {1751-0813}, support = {DE200100367//Australian Research Council/ ; }, mesh = {Animals ; *Circovirus/genetics/isolation &amp; purification ; *Genome, Viral ; *Bird Diseases/virology ; Phylogeny ; *Circoviridae Infections/veterinary/virology ; *Parakeets/virology ; *Parvovirus/genetics/isolation &amp; purification ; Endangered Species ; Feces/virology ; *Parvoviridae Infections/veterinary/virology ; }, abstract = {Birds are known to harbour a wide range of pathogenic viruses, including the beak and feather disease virus (BFDV; species, Circovirus parrot), which poses a significant threat to the conservation of endangered avian species. This study reports the genomic identification and characterisation of a novel psittaciform chaphamaparvovirus (PsChPV-6) and BFDV, sequenced from the faecal samples of healthy Alexandrine parakeets (Psittacula eupatria). PsChPV-6 is a linear, single-stranded DNA virus consisting of 4232 nucleotides (nt) with a high A + T content and five predicted open reading frames (ORFs). Key proteins encoded by PsChPV-6, such as the nonstructural protein 1 (NS1) and major capsid protein VP1, demonstrate strong sequence similarities to other avian parvoviruses, with conserved motifs in NS1 crucial for viral replication. The presence of a previously uncharacterised ORF1 region suggests strain-specific viral features that warrant further exploration. BFDV is a circular single-stranded DNA virus in the Circoviridae family and was also identified in the samples. Phylogenetic analysis positioned PsChPV-6 within the Chaphamaparvovirus genus, closely related to parvoviruses from diverse avian species, whereas BFDV was grouped with strains from Australian cockatoos and other nonpsittacine birds, suggesting potential cross-species transmission. These findings contribute to a deeper understanding of the genetic diversity and evolutionary dynamics of these viral pathogens in bird populations, underscoring the importance of ongoing surveillance to evaluate their ecological and veterinary impacts.}, }
@article {pmid40573768, year = {2025}, author = {Giménez-Valero, C and Maciá-Vázquez, AA and Núñez-Gómez, D and Conesa, A and Lidón, V and Melgarejo, P}, title = {Evolution of the Soil Bacterial Community as a Function of Crop Management: A Metagenomic Study in Orange Tree (Citrus sinensis) Plantations.}, journal = {Plants (Basel, Switzerland)}, volume = {14}, number = {12}, pages = {}, doi = {10.3390/plants14121781}, pmid = {40573768}, issn = {2223-7747}, support = {AGROALNEXT program (AGROALNEXT 2022/013, SIRIS Project)//European Union/ ; }, abstract = {Soil management significantly influences the structure and diversity of soil bacterial communities, affecting biodiversity and ecosystem functions. In semi-arid regions, water efficiency strategies like anti-weed netting are implemented, but their impact on soil microbial communities remains underexplored. This study evaluates the temporal evolution of soil bacterial communities in orange tree (Citrus sinensis (L.) Osbeck) plantations under two conditions: with and without anti-weed netting. Soil samples were collected at three time points over a period of 18 months since the establishment of the crop and analyzed using high-throughput 16S rRNA sequencing, assessing alpha and beta diversity, taxonomic composition, and functional pathways via KEGG analysis. The results indicate that weed control netting contributes to stabilizing bacterial diversity over time and increases the relative abundance of dominant phyla such as Planctomycetota, Proteobacteria, Bacteroidota, and Acidobacteriota. Functional predictions revealed significant differences in metabolic pathways, including those associated with nitrogen fixation and organic matter degradation. These findings suggest that anti-weed netting not only influences the taxonomic composition of soil bacterial communities but also modulates their functional potential, with implications for sustainable agriculture in semi-arid environments. This study provides new insights into the interaction between soil management and soil bacterial communities, offering valuable information for optimizing agricultural practices and soil conservation strategies.}, }
@article {pmid40573403, year = {2025}, author = {Zhang, X and Fan, IX and Xu, Y and Rule, J and Tse, LPV and Pourkarim, MR and Lee, WM and Di Bisceglie, AM and Fan, X}, title = {Novel Viral Sequences in a Patient with Cryptogenic Liver Cirrhosis Revealed by Serum Virome Sequencing.}, journal = {Viruses}, volume = {17}, number = {6}, pages = {}, doi = {10.3390/v17060812}, pmid = {40573403}, issn = {1999-4915}, support = {1R21AI175438-24/NH/NIH HHS/United States ; }, mesh = {Humans ; *Liver Cirrhosis/virology ; *Virome/genetics ; Male ; Middle Aged ; Female ; *Viruses/genetics/classification/isolation &amp; purification ; Genome, Viral ; Metagenomics ; Aged ; Sequence Analysis, DNA ; Adult ; *Serum/virology ; }, abstract = {Clinical studies indicate the etiology of liver disease to be unknown in 5% to 30% of patients. A long-standing hypothesis is the existence of unknown viruses beyond hepatitis A through E virus. We conducted serum virome sequencing in nine patients with cryptogenic liver disease and identified eight contigs that could not be annotated. One was determined to be a contaminant, while two of seven contigs from an individual (Patient 3) were validated by reverse transcription and polymerase chain reaction (RT-PCR) and Sanger sequencing. The possibility of contamination was completely excluded through PCR, with templates extracted using different methods from samples taken at different time points. One of the contigs, Seq260, was characterized as negative-sense single-stranded DNA via enzymatic digestion and genome walking. Digital-droplet PCR revealed the copy number of Seq260 to be low: 343 copies/mL. Seq260-based nested PCR screening was negative in 200 blood donors and 225 patients with liver disease with/without known etiologies. None of the seven contigs from Patient 3 was mapped onto 118,713 viral metagenomic data. Conclusively, we discovered seven unknown contigs from a patient with cryptogenic liver cirrhosis. These sequences are likely from a novel human virus with a negative-sense, linear single-stranded DNA genome.}, }
@article {pmid40573349, year = {2025}, author = {Hernández-Villegas, EN and Castelán-Sánchez, HG and Moreira-Soto, A and Vigueras-Galván, AL and Jiménez-Rico, MA and Rico-Chávez, O and Rodríguez-González, S and Tolsá-García, MJ and Roiz, D and Martínez-Duque, P and Arana-Guardía, R and García-Súarez, O and Jiménez, MZ and Falcón, LI and Roche, B and Sarmiento-Silva, RE and Arnal, A and Drexler, JF and Suzán, G}, title = {Characterization of the Virome in Mosquitoes Across Distinct Habitats in the Yucatán Peninsula, Mexico.}, journal = {Viruses}, volume = {17}, number = {6}, pages = {}, doi = {10.3390/v17060758}, pmid = {40573349}, issn = {1999-4915}, mesh = {Animals ; Mexico ; *Culicidae/virology ; *Ecosystem ; *Virome ; *Mosquito Vectors/virology ; *Viruses/classification/genetics/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; Phylogeny ; Genome, Viral ; Biodiversity ; }, abstract = {Human activities and land use changes have a major impact on the distribution and diversity of mosquito vectors and their associated viruses. This study describes the diversity and differential abundance of viruses associated with mosquito species from four habitats of the Yucatan Peninsula, Mexico. Using next-generation sequencing (NGS), we analyzed 61 genomic libraries belonging to 20 mosquito species to characterize the viral community. A total of 16 viral species were identified, representing 14 different viral families. Most identified viruses were associated with insects, plants, and fungi. Additionally, vertebrate associated viral families, including Herpesviridae, Peribunyaviridae, Nairoviridae, and Arenaviridae, were detected in mosquitoes from urban habitats. Notably, insect-associated viruses like Hubei mosquito virus 4 and Hubei virga-like virus 2 were identified, along with the first report of Mercadeo virus in Mexico. Variations in viral community composition were primarily driven by mosquito species, with species of the same genus maintaining similar viromes despite occupying different habitats. These findings reinforce that intrinsic traits of mosquito species play a key role in shaping viral community composition. To our knowledge, this is the first study that describes the viral community in mosquitoes in Yucatan Peninsula, Mexico. This study provides essential baseline data for the surveillance of mosquitoes and associated viruses from a biodiverse tropical region that faces strong land use modifications.}, }
@article {pmid40572043, year = {2025}, author = {Yang, C and Sun, J and Li, L and Zheng, J and Wang, C and Zhao, Y and Yun, D and Jia, M and Wu, Z and Liang, H and Li, W and Hu, T and Guo, R and Xiao, L and Zou, Y and Liu, Z}, title = {Synbiotics of Lactobacillus suilingensis and inulin alleviates cognitive impairment via regulating gut microbiota indole-3-lactic acid metabolism in female AD mice.}, journal = {Alzheimer's &amp; dementia : the journal of the Alzheimer's Association}, volume = {21}, number = {7}, pages = {e70406}, doi = {10.1002/alz.70406}, pmid = {40572043}, issn = {1552-5279}, support = {2022ZD0208100//National Science and Technology Innovation 2030-Major Program of Brain Science and Brain-Like Research/ ; 32241012//National Natural Science Foundation of China/ ; 32472351//National Natural Science Foundation of China/ ; JCYJ20220818102810022//Shenzhen Science and Technology Program/ ; XMHT20220104017//Shenzhen Municipal Government of China/ ; 2022A1515110717//Regional Consolidated Fund-Youth Fund Project in Guangdong Province/ ; BGIRSZ20220009//open project of BGI-shenzhen/ ; //China Biotechnology Development Center/ ; //Shenzhen Science and Technology Innovation Commission/ ; //Shenzhen Municipal Government/ ; //Guangdong Basic and Applied Basic Research Foundation/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Inulin/pharmacology/administration &amp; dosage ; Female ; *Cognitive Dysfunction/metabolism ; Mice ; *Synbiotics/administration &amp; dosage ; *Indoles/metabolism ; *Alzheimer Disease/metabolism ; Humans ; Tryptophan/metabolism ; Disease Models, Animal ; Receptors, Aryl Hydrocarbon/metabolism ; Probiotics ; }, abstract = {INTRODUCTION: Recent studies have found that gut microbial tryptophan metabolism is altered in Alzheimer's disease (AD) patients. However, the functional consequences of these changes and their therapeutic potential remain unclear.<br><br>METHODS: The metagenomic data of 49 preclinical AD patients and 115 healthy controls were analyzed. A synbiotic with targeted metabolic functions was formulated based on in vitro testing, and its effect on AD was evaluated using female 5&#xd7;FAD mice.<br><br>RESULTS: Indole lactic acid (ILA) synthesis was downregulated in AD patients. Synbiotic treatment combining Lactobacillus suilingensis and inulin outperformed probiotic treatment alone in enhancing tryptophan metabolism, and increasing ILA biosynthesis. Increased ILA could reduce A&#x3b2; accumulation and significantly alleviate cognitive impairment in female AD mice by inhibiting neuroinflammation through activation of the aryl hydrocarbon receptor (AhR) signaling pathway.<br><br>DISCUSSION: This study highlights the therapeutic potential of targeting gut microbial tryptophan metabolism in AD and provides a rationale for future precision strategies aimed at modulating microbiota-derived metabolic pathways.<br><br>HIGHLIGHTS: Gut metagenomic analysis reveals reduced indole lactic acid (ILA) biosynthesis genes in preclinical AD patients. Screening and formulating ILA-producing synbiotic by using whole-genome analysis. Synbiotic treatment alleviates cognitive impairment and promotes ILA synthesis in female 5&#xd7;FAD mice. ILA alleviates neuroinflammation in female 5&#xd7;FAD mice by activating aryl hydrocarbon receptor (AhR) in the brain. Synbiotic targeting tryptophan metabolism provides a novel approach for Alzheimer's intervention.}, }
@article {pmid40570071, year = {2025}, author = {Savelieva, EI and Shachneva, MD}, title = {Problems and prospects of metabolomic studies in the alteration of the gut microbiome.}, journal = {Biomeditsinskaia khimiia}, volume = {71}, number = {3}, pages = {195-208}, doi = {10.18097/PBMCR1556}, pmid = {40570071}, issn = {2310-6972}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Metabolomics/methods ; *Metabolome ; Animals ; Bile Acids and Salts/metabolism ; *Renal Insufficiency, Chronic/microbiology/metabolism ; Fatty Acids, Volatile/metabolism ; }, abstract = {The review summarizes existing knowledge on the relationship between certain diseases and alteration (degeneration) of the intestinal microbiome. We consider major microbial metabolites firmly recognized as signaling molecules acting in communication between the microbiome and the host organism. These include short-chain fatty acids, bile acids, amines, amino acids, and their metabolites. Special attention is paid to metabolomic studies of the microbiome in chronic kidney diseases, in particular, immunoglobulin A nephropathy. The arguments supporting a concept of the microbiome of blood, previously considered an exclusively sterile environment in healthy humans, are considered. Metagenomic methods plays a key role in characterization of both the composition and potential physiological effects of microbial communities. The advantages and limitations of metabolomic analysis of blood serum/plasma and feces have been analyzed. Since the potential of clinical studies of the mutual impact of the microbiome-metabolome is limited by genetic and external factors, preclinical studies still employ both germ-free models and models based on the effects of antibiotics. The review considers the problems and prospects of metabolomics in studying the nature and mechanisms of the mutual impact of the microbiome and metabolome.}, }
@article {pmid40445833, year = {2025}, author = {Li, W and Huang, B and Guo, M and Zeng, Z and Cai, T and Feng, L and Zhang, X and Guo, L and Jiang, X and Yin, Y and Wang, E and Huang, X and Zheng, J}, title = {Unveiling the evolution of antimicrobial peptides in gut microbes via foundation-model-powered framework.}, journal = {Cell reports}, volume = {44}, number = {6}, pages = {115773}, doi = {10.1016/j.celrep.2025.115773}, pmid = {40445833}, issn = {2211-1247}, mesh = {*Antimicrobial Peptides/genetics/chemistry/pharmacology ; *Gastrointestinal Microbiome/genetics ; Humans ; *Evolution, Molecular ; Anti-Bacterial Agents/pharmacology ; }, abstract = {Antimicrobial resistance poses a major threat to public health, prompting the development of alternative therapies such as antimicrobial peptides (AMPs). Protein language models (PLMs) have advanced protein structure and function predictions, facilitating AMP discovery. We developed antimicrobial peptide structural evolution miner (AMP-SEMiner), an AI-driven framework that integrates PLMs, structural clustering, and evolutionary analysis to systematically identify AMPs encoded by small open reading frames and AMP-containing proteins in metagenome-assembled genomes. AMP-SEMiner identified over 1.6 million AMP candidates across diverse environments. Experimental validation showed antimicrobial activity in 9 of the 20 tested candidates, with 5 surpassing antibiotic effectiveness; variant peptides derived from these candidates similarly demonstrated strong antimicrobial efficacy. AMPs from human gut microbiomes revealed both conserved and adaptive evolutionary strategies, reflecting their dynamic ecological roles. AMP-SEMiner thus represents a valuable tool for expanding AMP discovery and has significant potential to inform the development of alternative antimicrobial treatments.}, }
@article {pmid40313234, year = {2025}, author = {Leibovitzh, H and Fliss Isakov, N and Werner, L and Thurm, T and Hirsch, A and Cohen, NA and Maharshak, N}, title = {A Mushroom Based Prebiotic Supplement Pilot Study Among Patients with Crohn's Disease.}, journal = {Journal of dietary supplements}, volume = {22}, number = {4}, pages = {511-524}, doi = {10.1080/19390211.2025.2498127}, pmid = {40313234}, issn = {1939-022X}, mesh = {Humans ; *Prebiotics/administration &amp; dosage ; *Crohn Disease/microbiology/therapy/drug therapy ; Pilot Projects ; Female ; Male ; Feces/microbiology/chemistry ; Double-Blind Method ; Adult ; *Dietary Supplements ; *Agaricales/chemistry ; Gastrointestinal Microbiome ; Middle Aged ; Leukocyte L1 Antigen Complex/analysis ; C-Reactive Protein/analysis ; Treatment Outcome ; Young Adult ; }, abstract = {Data on a mushroom based prebiotic supplementation in patients with Crohn's disease (CD) in western population is scarce. In this pilot trial, we aimed to assess the clinical efficacy and fecal microbial compositional and functional alterations associated with 'Mycodigest,' a commercial prebiotic supplement composed of three mushroom extracts. Patients with mild to moderate CD were recruited to a single center, randomized, double-blind, placebo-controlled pilot induction trial. Clinical efficacy using the Harvey-Bradshaw index and biochemical response using C-reactive protein and fecal calprotectin were assessed at week 8 post-intervention. Fecal samples were assessed by DNA shotgun metagenomic sequencing. A multivariable linear mixed effects model was used to assess alteration in fecal microbiome composition and function pre- and post-'Mycodigest' intervention. Clinical response was higher in the 'Mycodigest' intervention (N = 10) compared to the placebo (N = 6) group (80 vs. 16.7%, respectively, p = 0.035). There were no differences in terms of biochemical response within each group pre- and post-intervention. Post-'Mycodigest' intervention, 25 species were found to be differentially abundant compared to baseline, including increase in short chain fatty acid producing bacteria, such as Parabacteroides distasonis (Beta coefficient 0.92, 95% Confidence interval [CI] 0.36-1.47) and Faecalimonas umbilicata (Beta coefficient 0.57, 95% CI 0.23-0.90). Two microbial pathways related to the metabolism of isoprenoid compounds were increased post-'Mycodigest' intervention. Mushroom based prebiotic supplementation in subjects with CD resulted in clinical improvement which may be related to post-intervention favorable compositional and functional microbial alterations.}, }
@article {pmid40569902, year = {2025}, author = {Belheouane, M and Kalsdorf, B and Niemann, S and Gaede, KI and Lange, C and Heyckendorf, J and Merker, M}, title = {Serratia sp. traits distinguish the lung microbiome of patients with tuberculosis and non-tuberculous mycobacterial lung diseases.}, journal = {PloS one}, volume = {20}, number = {6}, pages = {e0325362}, doi = {10.1371/journal.pone.0325362}, pmid = {40569902}, issn = {1932-6203}, mesh = {Humans ; *Microbiota/genetics ; Male ; Middle Aged ; *Lung/microbiology ; RNA, Ribosomal, 16S/genetics ; Female ; Adult ; *Serratia/genetics/isolation &amp; purification/classification ; Bronchoalveolar Lavage Fluid/microbiology ; Aged ; *Mycobacterium Infections, Nontuberculous/microbiology ; Nontuberculous Mycobacteria/genetics ; *Tuberculosis, Pulmonary/microbiology ; *Lung Diseases/microbiology ; }, abstract = {BACKGROUND: Pathogenic mycobacteria, such as Mycobacterium tuberculosis complex (Mtbc), and non-tuberculous mycobacteria (NTMs) can cause severe chronic pulmonary infections. However, not all infected patients develop active disease, and it remains unclear whether key lung microbiome taxa play a role in the pathogenesis of tuberculosis (TB) and NTM lung diseases (LD). Here, we aim to further define the lung microbiome composition in TB, and NTM-LD prior to the initiation of therapy.<br><br>STUDY DESIGN: We employed 16S rRNA amplicon sequencing to characterize the baseline microbiome in bronchoalveolar lavage fluid (BALF) from patients diagnosed with TB (n&#x2009;=&#x2009;23), NTM-LD (n&#x2009;=&#x2009;19), or non-infectious inflammatory disease (n&#x2009;=&#x2009;4). We applied depletion of human cells, removal of extracellular DNA, implementation of a decontamination strategy, and exploratory whole-metagenome sequencing (WMS) of selected specimens.<br><br>RESULTS: Genera Serratia and unclassified Yersiniaceae dominated the lung microbiome of most patients with a mean relative abundance of >15% and >70%, respectively. However, at the sub-genus level, as determined by amplicon sequence variants (ASVs), TB-patients exhibited increased community diversity, and distinct signatures of ASV_7, ASV_21 abundances which resulted in a significant association with disease state. Exploratory WMS, and ASV similarity analyses suggested the presence of Serratia liquefaciens, Serratia grimesii, Serratia myotis and/or Serratia quinivorans in TB and NTM-LD patients.<br><br>CONCLUSIONS: The lung microbiome of TB-patients harbored a distinct, and heterogenous structure, with specific occurrences of certain Serratia traits. Some of these traits may play a role in understanding the microbial interactions in the lung microbiome of patients infected with Mtbc.}, }
@article {pmid40569694, year = {2025}, author = {Kasmanas, JC and Magnúsdóttir, S and Zhang, J and Smalla, K and Schloter, M and Stadler, PF and de Leon Ferreira de Carvalho, ACP and Rocha, U}, title = {Integrating comparative genomics and risk classification by assessing virulence, antimicrobial resistance, and plasmid spread in microbial communities with gSpreadComp.}, journal = {GigaScience}, volume = {14}, number = {}, pages = {}, doi = {10.1093/gigascience/giaf072}, pmid = {40569694}, issn = {2047-217X}, support = {2019/03,396-9//S&#xe3;o Paulo Research Foundation/ ; 2022/03,534-5//S&#xe3;o Paulo Research Foundation/ ; //Deutsche Forschungsgemeinschaft/ ; //International Development Research Centre/ ; }, mesh = {*Plasmids/genetics ; Humans ; *Genomics/methods ; Virulence/genetics ; *Drug Resistance, Bacterial/genetics ; Gastrointestinal Microbiome/genetics ; Virulence Factors/genetics ; Computational Biology/methods ; Software ; Genome, Bacterial ; *Bacteria/genetics/pathogenicity/drug effects ; }, abstract = {BACKGROUND: Comparative genomics, genetic spread analysis, and context-aware ranking are crucial in understanding microbial dynamics' impact on public health. gSpreadComp streamlines the path from in silico analysis to hypothesis generation. By integrating comparative genomics, genome annotation, normalization, plasmid-mediated gene transfer, and microbial resistance-virulence risk-ranking into a unified workflow, gSpreadComp facilitates hypothesis generation from complex microbial datasets.<br><br>FINDINGS: The gSpreadComp workflow works through 6 modular steps: taxonomy assignment, genome quality estimation, antimicrobial resistance (AMR) gene annotation, plasmid/chromosome classification, virulence factor annotation, and downstream analysis. Our workflow calculates gene spread using normalized weighted average prevalence and ranks potential resistance-virulence risk by integrating microbial resistance, virulence, and plasmid transmissibility data and producing an HTML report. As a use case, we analyzed 3,566 metagenome-assembled genomes recovered from human gut microbiomes across diets. Our findings indicated consistent AMR across diets, with diet-specific resistance patterns, such as increased bacitracin in vegans and tetracycline in omnivores. Notably, ketogenic diets showed a slightly higher resistance-virulence rank, while vegan and vegetarian diets encompassed more plasmid-mediated gene transfer.<br><br>CONCLUSIONS: The gSpreadComp workflow aims to facilitate hypothesis generation for targeted experimental validations by the identification of concerning resistant hotspots in complex microbial datasets. Our study raises attention to a more thorough study of the critical role of diet in microbial community dynamics and the spread of AMR. This research underscores the importance of integrating genomic data into public health strategies to combat AMR. The gSpreadComp workflow is available at https://github.com/mdsufz/gSpreadComp/.}, }
@article {pmid40568302, year = {2025}, author = {Ostrzinski, A and Kunath, BJ and Soares, AR and Laczny, CC and Halder, R and Kallmeyer, J and di Primio, R and Wilmes, P and Probst, AJ and Trautwein-Schult, A and Becher, D}, title = {Systematic evaluation of protein extraction for metaproteomic analysis of marine sediment with high clay content.}, journal = {ISME communications}, volume = {5}, number = {1}, pages = {ycaf074}, pmid = {40568302}, issn = {2730-6151}, abstract = {Marine sediments harbor extremely diverse microbial communities that contribute to global biodiversity and play an essential role in the functioning of ecosystems. However, the metaproteome of marine sediments is still poorly understood. The extraction of proteins from environmental samples is still a challenge, especially from marine sediments, due to the complexity of the matrix. Therefore, methods for protein extraction from marine sediments need to be improved. To develop an effective workflow for protein extraction for clayey sediments, we compared, combined and enhanced different protein extraction methods. The workflow presented here includes blocking of protein binding sites on sediment particles with high concentrations of amino acids, effective cell lysis by ultrasonic capture, electro-elution, and simultaneous fractionation of proteins. To test the protocol's efficacy, we added Escherichia coli cells to sediment samples before protein extraction. By using our refined workflow, we were able to identify a comparable number of E. coli proteins from the supplemented sediment to those from pure E. coli cultures. This new protocol will enable future studies to identify active players in clay-rich marine sediments and accurately determine functional biodiversity based on their respective protein complements.}, }
@article {pmid40566942, year = {2025}, author = {Kara, K and Yilmaz Öztaş, S and Baytok, E}, title = {In Vitro Ruminal Metagenomic Profiles and Ruminal Fermentation Variables of Aromatic Plant Pulps.}, journal = {Veterinary medicine and science}, volume = {11}, number = {4}, pages = {e70447}, doi = {10.1002/vms3.70447}, pmid = {40566942}, issn = {2053-1095}, support = {TSA-2023-13007//Erciyes University Scientific Research Projects Unit/ ; }, mesh = {*Fermentation ; *Rumen/microbiology/metabolism/physiology ; Animals ; Cattle ; Metagenomics ; Animal Feed/analysis ; *Metagenome ; Gastrointestinal Microbiome ; Digestion ; }, abstract = {BACKGROUND: Aromatic plant residues remaining after aromatic oil extraction represent a promising alternative feed source due to their rich bioactive compound content and fibrous structure. However, their fermentative behaviour and microbial degradability in the rumen require evaluation.<br><br>OBJECTIVE: This study aimed to determine the nutrient composition, in vitro ruminal gas production, digestibility characteristics and fermentation end-products of aromatic plant pulps (sage, thyme, lavender and yarrow) obtained via hydrodistillation.<br><br>METHODS: Dried pulps were analysed for nutrient contents and subjected to in vitro ruminal fermentation for 24&#xa0;h. Gas production estimated metabolizable energy (ME), net energy for lactation (NEL), organic matter digestibility (OMd), ammonia nitrogen (NH3-N) and short-chain fatty acid (SCFA) profiles were evaluated. Microbial community composition was assessed via 16S rRNA-based metagenomics.<br><br>RESULTS: Yarrow pulp had the highest gas production, ME, NEL, OMd and SCFA concentrations (AA, BA, IVA, T-SCFA) (p&#xa0;<&#xa0;0.05). Thyme pulp exhibited the highest NH3-N levels (75.14&#xa0;mg/L), suggesting high rumen-degradable protein content. Sage pulp had the lowest NH3-N levels (60.93&#xa0;mg/L). Microbial composition shifted with fibre content; higher lignin (in lavender) was associated with lower Bacteroidota and higher Firmicutes abundance. Methanogenic archaea (Methanobrevibacter) were least abundant in thyme pulp (p&#xa0;<&#xa0;0.05).<br><br>CONCLUSION: Due to their fermentability and favourable microbial responses, aromatic plant pulps, particularly yarrow, show promise as functional ruminant feed ingredients. These byproducts may enhance ruminal fibre utilization while modulating microbial ecology and reducing methane-associated archaea.}, }
@article {pmid40565014, year = {2025}, author = {Monareng, NJ and Ncube, KT and van Rooi, C and Modiba, MC and Mtileni, B}, title = {A Systematic Review on Microbial Profiling Techniques in Goat Milk: Implications for Probiotics and Shelf-Life.}, journal = {International journal of molecular sciences}, volume = {26}, number = {12}, pages = {}, doi = {10.3390/ijms26125551}, pmid = {40565014}, issn = {1422-0067}, support = {PMDS240528221992//National Research Foundation/ ; }, mesh = {Goats ; Animals ; *Milk/microbiology ; *Probiotics ; *Microbiota ; *Food Microbiology ; Humans ; }, abstract = {Due to its high digestibility, rich nutrient profile, and potential probiotic content, goat milk is an essential nutritional resource, particularly for individuals with cow milk allergies. This review summarises the current state of microbial diversity in goat milk, emphasising the implications for quality, safety, and probiotic potential. This systematic review adhered to PRISMA guidelines, conducting a comprehensive literature search across PubMed, ScienceDirect, and Google Scholar using keywords related to microbial profiling in goat milk. The inclusion criteria targeted English-language studies from 2000 to 2025 that utilised high-throughput or next-generation sequencing methods. Out of 126 articles screened, 84 met the eligibility criteria. The extracted data focused on microbial diversity, profiling techniques, and their respective strengths and limitations in evaluating probiotic potential and spoilage risks. The review addresses the challenges linked to microbial spoilage and the composition and functional roles of microbial communities in goat milk. With species such as Bacillus and Pseudomonas playing crucial roles in fermentation and spoilage, key findings emphasise the prevalence of microbial phyla, including Proteobacteria, Firmicutes, and Actinobacteria in goat milk. The review also explores the probiotic potential of the goat milk microbiota, highlighting the health benefits associated with strains such as Lactobacillus and Bifidobacterium. Significant discoveries underline the necessity for advanced multi-omics techniques to thoroughly define microbial ecosystems and the substantial gaps in breed-specific microbiota research. Important findings illustrate the need for enhanced multi-omics techniques, given the challenges of host RNA and protein interference, low microbial biomass, and limited goat-specific reference databases, for optimising probiotic development, spoilage prevention strategies, and integrating metagenomics, metabolomics, metaproteomics, and metatranscriptomics to improve milk quality and safety as some of the future research objectives. This study emphasises the importance of understanding goat milk microbiology to advance dairy science and enhance human health.}, }
@article {pmid40563104, year = {2025}, author = {Trutschel, L and Kruger, B and Czaja, A and Brueck, M and Sackett, J and Druschel, G and Rowe, A}, title = {Sulfide Oxidation Products Support Microbial Metabolism at Interface Environments in a Marine-Like Serpentinizing Spring in Northern California.}, journal = {Geobiology}, volume = {23}, number = {4}, pages = {e70026}, doi = {10.1111/gbi.70026}, pmid = {40563104}, issn = {1472-4669}, support = {80NSSC21K0482/NASA/NASA/United States ; }, mesh = {Oxidation-Reduction ; California ; *Sulfides/metabolism ; *Bacteria/metabolism/classification/genetics ; *Natural Springs/microbiology/chemistry ; Microbiota ; }, abstract = {Interface environments between extreme and neutrophilic conditions are often hotspots of metabolic activity and taxonomic diversity. In serpentinizing systems, the mixing of high pH fluids with meteoric water, and/or the exposure of these fluids to the atmosphere can create interface environments with distinct but related metabolic activities and species. Investigating these systems can provide insights into the factors that stimulate microbial growth, and/or what attributes may be limiting microbial physiologies in native serpentinized fluids. To this aim, changes in geochemistry and microbial communities were investigated for different interface environments at Ney Springs-a marine-like terrestrial serpentinization system where the main serpentinized fluids have been well characterized geochemically and microbially. We found that reduced sulfur species from Ney Springs had large impacts on the community changes observed at interface environments. Oxygen availability at outflow environments resulted in a relative increase in the taxa observed that were capable of sulfur oxidation, and in some cases light-driven sulfur oxidation. A combination of cultivation work and metagenomics suggests these groups seem to predominantly target sulfur intermediates like polysulfide, elemental sulfur, and thiosulfate as electron donors, which are present and abundant to various degrees throughout the Ney system. Fluid mixing with meteoric water results in more neutral pH systems which in turn select for different sulfur-oxidizing taxa. Specifically, we see blooms of taxa that are not typically observed in the primary Ney fluids, such as Halothiobacillus in zones where fluids mix underground with meteoric water (~pH 10) or the introduction of Thiothrix into the nearby creek as fluids enter at the surface (~pH 8). This work points to the potential importance of oxidants for stimulating microbial respiration at Ney Springs, and the observation that these serpentinized fluids act as an important source of reduced sulfur, supporting diverse taxa around the Ney Springs system.}, }
@article {pmid40478429, year = {2025}, author = {Ogola, HJO and Ijoma, GN and Edokpayi, JN}, title = {Hydrological regime and niche partitioning drive fungal community structure and function in arid wetlands sediments of South Africa.}, journal = {Environmental science and pollution research international}, volume = {32}, number = {25}, pages = {15217-15231}, pmid = {40478429}, issn = {1614-7499}, support = {DST/CON0197/2017//Department of Science and Innovation, South Africa/ ; }, mesh = {*Wetlands ; South Africa ; *Fungi ; *Geologic Sediments/microbiology ; Hydrology ; Mycobiome ; Mycorrhizae ; Ecosystem ; Biodiversity ; }, abstract = {Arid wetlands are ecologically significant yet understudied ecosystems shaped by extreme conditions and hydrological variability. However, the structure and ecological functional of fungal communities in these habitats remain poorly understood, especially in southern Africa. This study integrated shotgun metagenomics, FUNGuild functional profiling, and multivariate analyses to examine fungal diversity, functional composition, and environmental drivers in seasonal and permanent arid wetlands of South Africa. Distinct fungal assemblages emerged, primarily shaped by hydrological regimes and ionic stress. Seasonal wetlands were dominated by Mucoromycota (79%), particularly arbuscular mycorrhizal (AM) fungus (Rhizophagus, 62%), while permanent wetlands had higher Ascomycota (54%), with Aspergillus (50%) prevalent in oxygen-limited sediments. Although alpha diversity showed no significant difference, beta diversity confirmed significant mycobiome differentiation. Total dissolved solids (TDS), electrical conductivity (EC), and salinity were key predictors of fungal composition, with TDS the strongest determinant (p < 0.01). Functional guild analysis highlighted niche differentiation, with saprotrophs dominating permanent wetlands (59.7% vs. 21.5%; p < 0.05), while symbiotrophs, particularly AM fungi, were enriched in seasonal wetlands (69.3% vs. 36.1%; p < 0.001). Indicator taxa identified via LefSe (LDA > 3, p < 0.05) and random forest modeling included Rhizophagus, Trichoderma, Fusarium, and Entomophthora in seasonal wetlands, and Aspergillus in permanent wetlands. This study provides the first integrative insight into fungal ecology in South Africa's arid wetlands, demonstrating that hydrological regime shapes fungal structure and function through environmental filtering and niche specialization, with implications for guiding conservation and adaptive management of these fragile ecosystems.}, }
@article {pmid40310938, year = {2025}, author = {Ma, WJ and Wang, C and Kothandapani, J and Luzentales-Simpson, M and Menzies, SC and Bescucci, DM and Lange, ME and Fraser, ASC and Gusse, JF and House, KE and Moote, PE and Xing, X and Grondin, JM and Hui, BW and Clarke, ST and Shelton, TG and Haskey, N and Gibson, DL and Martens, EC and Abbott, DW and Inglis, GD and Sly, LM and Brumer, H}, title = {Bespoke plant glycoconjugates for gut microbiota-mediated drug targeting.}, journal = {Science (New York, N.Y.)}, volume = {388}, number = {6754}, pages = {1410-1416}, doi = {10.1126/science.adk7633}, pmid = {40310938}, issn = {1095-9203}, mesh = {Animals ; *Gastrointestinal Microbiome ; Humans ; Mice ; *Glycoconjugates/chemistry/administration &amp; dosage ; *Drug Delivery Systems/methods ; *Inflammatory Bowel Diseases/drug therapy/microbiology ; Glycoside Hydrolases/metabolism ; *Anti-Inflammatory Agents/administration &amp; dosage ; *Oligosaccharides/chemistry ; Dietary Fiber/metabolism ; Bacteria/enzymology/metabolism ; }, abstract = {The gut microbiota of mammals possess distinctive metabolic pathways with untapped therapeutic potential. Using molecular insights into dietary fiber metabolism by the human gut microbiota, we designed a targeted drug delivery system, called GlycoCaging, that is based on bespoke glycoconjugates of a complex plant oligosaccharide. GlycoCaging of exemplar anti-inflammatory drugs enabled release of active molecules triggered by specific glycosidases of autochthonous gut bacteria. GlycoCaging ensured that drug efficacy was potentiated, and off-target effects were eliminated in murine models of inflammatory bowel disease. Biochemical and metagenomic analyses of gut microbiota of individual humans confirmed the broad applicability of this strategy.}, }
@article {pmid40560512, year = {2025}, author = {Pramanik, K and Sen, A and Dutta, S and Mandal, GS and Paramanik, B and Das, A and Chatterjee, N and Ghorai, AK and Ali, MN}, title = {Microbial populations under fluoride stress: a metagenomic exploration from Indian soil.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {41}, number = {7}, pages = {221}, pmid = {40560512}, issn = {1573-0972}, mesh = {*Soil Microbiology ; *Fluorides/analysis ; India ; Metagenomics ; *Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Soil/chemistry ; Fungi/genetics/classification/drug effects/isolation &amp; purification ; Archaea/genetics/classification/drug effects/isolation &amp; purification ; Metagenome ; Phylogeny ; Microbiota/drug effects ; }, abstract = {Fluoride exposure, even at a low concentration, significantly impairs crop growth and productivity by inhibiting metabolic enzymes and disrupting photosynthesis. Addressing this challenge, microbial de-fluoridation emerges as a vital strategy to improve soil health, enhance crop growth, and ensure agricultural sustainability. This study analyzed topsoil samples (0-0.2 m depth) from rice fields in three blocks of Purulia district, West Bengal-Arsha, Jhalda-I, and Joypur. Fluoride content in the samples ranged from 58.76 ± 0.76 mg/kg to 282.9 ± 4.9 mg/kg (total) and 1.57 ± 0.02 mg/kg to 2.97 ± 0.03 mg/kg (available). The metagenomic analysis of the collected soil samples revealed diverse microbial communities comprising archaea, bacteria, fungi, and viruses, with Actinobacteria (phylum), Hyphomicrobiales (order), and Nocardioidaceae (family) being the dominant prokaryotes. Arsha soil with comparatively low fluoride contamination exhibited the highest microbial diversity (11,891 taxa), followed by Joypur (11,528 taxa) and Jhalda-I (11,358 taxa), with Arsha showing nearly double the unique microbial taxa compared to the other locations. Clusters of orthologous groups of proteins functional analysis identified 60,898 genes in Arsha, 63,403 genes in Jhalda-I, and 73,334 genes in Joypur, while Kyoto encyclopedia of genes and genomes analysis revealed 9,385, 9,104, and 10,633 genes, respectively. Key genes associated with fluoride metabolism-inorganic pyrophosphatase, divalent metal cation transporter mntH, and putative fluoride ion transporter crcB-were abundant across all sites, highlighting the influence of fluoride on microbial community structure. This study provides the first comprehensive report on soil microbial communities in fluoride-rich areas, highlighting the potential of native fluoride-tolerant microbes to mitigate fluoride toxicity in agricultural soils and offer sustainable, microbe-based solutions to fluoride contamination.}, }
@article {pmid40559651, year = {2025}, author = {Wimmer, BC and Dwan, C and De Medts, J and Duysburgh, C and Rotsaert, C and Marzorati, M}, title = {Undaria pinnatifida Fucoidan Enhances Gut Microbiome, Butyrate Production, and Exerts Anti-Inflammatory Effects in an In Vitro Short-Term SHIME[®] Coupled to a Caco-2/THP-1 Co-Culture Model.}, journal = {Marine drugs}, volume = {23}, number = {6}, pages = {}, doi = {10.3390/md23060242}, pmid = {40559651}, issn = {1660-3397}, support = {n.a.//Marinova Pty Ltd., 249 Kennedy Drive, Cambridge, TAS 7170, Australia/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Polysaccharides/pharmacology/isolation &amp; purification ; *Undaria/chemistry ; *Anti-Inflammatory Agents/pharmacology ; Caco-2 Cells ; Coculture Techniques ; *Butyrates/metabolism ; THP-1 Cells ; Colon/microbiology/drug effects ; Feces/microbiology ; Cytokines/metabolism ; Adult ; Fatty Acids, Volatile/metabolism ; Edible Seaweeds ; }, abstract = {Fucoidans have demonstrated a wide range of bioactivities including immune modulation and benefits in gut health. To gain a deeper understanding on the effects of fucoidan from Undaria pinnatifida (UPF) on the colonic microbiome, the short-term Simulator of the Human Intestinal Microbial Ecosystem[®], a validated in vitro gut model, was applied. Following a three-week intervention period on adult faecal samples from three healthy donors, microbial community activity of the colonic microbiota was assessed by quantifying short-chain fatty acids while composition was analysed utilising 16S-targeted Illumina sequencing. Metagenomic data were used to describe changes in community structure. To assess the secretion of cytokines, co-culture experiments using Caco-2 and THP1-Blue™ cells were performed. UPF supplementation over a three-week period had a profound butyrogenic effect while also enriching colonic microbial diversity, consistently stimulating saccharolytic genera, and reducing genera linked with potentially negative health effects in both regions of the colon. Mild immune modulatory effects of UPF were also observed. Colonic fermentation of UPF showed anti-inflammatory properties by inducing the secretion of the anti-inflammatory cytokines IL-6 and IL-10 in two out of three donors in the proximal and distal colon. In conclusion, UPF supplementation may provide significant gut health benefits.}, }
@article {pmid40558870, year = {2025}, author = {Abreu, CM and Carneiro, GHF and Costa, MRD and Barroso, GM and Duque, TS and Silva, JMS and Santos, JBD}, title = {Avena sativa as a Multifunctional Tool for Phytoremediation and Bioenergy Production in Sulfentrazone Contaminated Soils.}, journal = {Journal of xenobiotics}, volume = {15}, number = {3}, pages = {}, doi = {10.3390/jox15030087}, pmid = {40558870}, issn = {2039-4713}, support = {APQ 01151-23; APQ 00694-23 and, APQ 004955-23//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de Minas Gerais/ ; 001//National Council for Scientific and Technological Development/ ; }, abstract = {Phytoremediation using Avena sativa offers a sustainable strategy for mitigating sulfentrazone contamination while integrating bioenergy production. This study proposes an analysis of the bioenergy potential and the microbial metagenomic profile associated with Avena sativa in the presence and absence of sulfentrazone, aiming at the synergistic bioprospecting of microbial communities capable of biodegradation and remediation of contaminated environments. Using a randomized block design, we evaluated the bioenergy potential and rhizospheric microbial dynamics of A. sativa in soils with and without sulfentrazone (600 g ha[-1]). Herbicide residues were quantified via UHPLC-MS/MS, and metagenomic profiles were obtained through 16S rRNA gene and ITS region sequencing to assess shifts in rhizospheric microbiota. Microbial diversity was analyzed using the Shannon and Gini-Simpson Indices, complemented by Principal Component Analysis (PCA). Bioenergy yields (biogas and ethanol) were estimated based on plant biomass. Over 80 days, the cultivation of A. sativa promoted a 19.7% dissipation of sulfentrazone, associated with rhizospheric enrichment of plant growth-promoting taxa (Bradyrhizobium, Rhodococcus, and Trichoderma), which increased by 68% compared to uncontaminated soils. Contaminated soils exhibited reduced microbial diversity (Gini-Simpson Index = 0.7), with a predominance of Actinobacteria and Ascomycota, suggesting adaptive specialization. Despite herbicide-induced stress (39.3% reduction in plant height and 60% reduction in grain yield), the biomass demonstrated considerable bioenergy potential: 340.6 m[3] ha[-1] of biogas and 284.4 L ha[-1] of ethanol. The findings highlight the dual role of A. sativa in soil rehabilitation and renewable energy systems, supported by plant-microbe synergies. Scalability challenges and regulatory gaps in ecotoxicological assessments were identified, reinforcing the need to optimize microbial consortia and implement region-specific management strategies. These results support the integration of phytoremediation into circular bioeconomy models, balancing ecological recovery with agricultural productivity. Future research should focus on microbial genetic pathways, field-scale validation, and the development of regulatory frameworks to advance this green technology in global soil remediation efforts.}, }
@article {pmid40557154, year = {2025}, author = {Bai, X and Raju, SC and Knudsen, AD and Thudium, RF and Arentoft, NS and Gelpi, M and Heidari, SL and Kunisaki, KM and Kristiansen, K and Hov, JR and Nielsen, SD and Trøseid, M}, title = {Microbiome profiling reveals gut bacterial species associated with rapid lung function decline in people with HIV.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1555441}, pmid = {40557154}, issn = {1664-3224}, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; *HIV Infections/microbiology/complications/physiopathology ; Middle Aged ; Dysbiosis ; *Lung/physiopathology ; *Bacteria/genetics/classification ; Adult ; *Lung Diseases/microbiology ; Respiratory Function Tests ; Aged ; }, abstract = {BACKGROUND: People with HIV (PWH) have an increased risk of pulmonary comorbidities compared to people without HIV. The gut microbiome regulates host immunity and is altered in PWH. This study aims to determine potential associations between gut microbiome, lung function decline, and airflow limitation in PWH.<br><br>METHODS: PWH from the Copenhagen Comorbidity in HIV Infection (COCOMO) Study with available lung function testing and microbiome data were included (n=385). The gut microbiome was characterized using shotgun metagenomic sequencing. Associations between gut microbiome, rapid lung function decline, and airflow limitation were analysed in multivariable logistic regressions adjusted for traditional and HIV-associated risk factors for lung disease.<br><br>RESULTS: Several bacterial species were significantly enriched in PWH with rapid lung function decline, including opportunistic pathogenic bacterial species Bacteroides coprophilus, Klebsiella michiganensis, and Clostridium perfringens. A gut microbial dysbiosis index based on compositional changes was associated with rapid lung function decline (adjusted odds ratio (aOR) 1.18, 95% confidence interval (CI) [1.11-1.27], p<0.001), and airflow limitation (aOR 1.16, 95% CI [1.04-1.29], p=0.007) in adjusted multivariable logistic regression analyses.<br><br>CONCLUSION: Associations between the gut dysbiosis index and rapid lung function decline and airflow limitation suggest a potential role of certain gut bacterial species in the pathogenesis of pulmonary comorbidities in PWH.}, }
@article {pmid40555747, year = {2025}, author = {Jarman, JB and Torres, PJ and Stromberg, S and Sato, H and Stack, C and Ladrillono, A and Pace, S and Jimenez, NL and Haselbeck, RJ and Insel, R and Van Dien, S and Culler, SJ}, title = {Bifidobacterium deficit in United States infants drives prevalent gut dysbiosis.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {867}, pmid = {40555747}, issn = {2399-3642}, mesh = {Humans ; *Bifidobacterium/isolation &amp; purification/genetics ; *Gastrointestinal Microbiome ; *Dysbiosis/epidemiology/microbiology ; Infant ; United States/epidemiology ; Female ; Male ; Infant, Newborn ; Metagenomics ; }, abstract = {The composition of the infant gut microbiome is critical to immune development and noncommunicable disease (NCD) trajectory. However, a comprehensive evaluation of the infant gut microbiome in the United States is lacking. The My Baby Biome study, designed to address this knowledge gap, evaluated the gut microbiomes of 412 infants (representative of U.S. demographic diversity) using metagenomics and metabolomics. Regardless of birth mode and/or feeding method, widespread Bifidobacterium deficit was observed, with approximately 25% of U.S. infants lacking detectable Bifidobacterium. Bifidobacterium-dominant microbiomes exhibit distinct features when compared to microbiomes with other dominant microbial compositions including reduced antimicrobial resistance and virulence factor genes, altered carbohydrate utilization pathways, and altered metabolic signatures. In C-section birth infants, Bifidobacterium tended to be replaced in the human milk oligosaccharide utilization niche with potentially pathogenic species. Longitudinal health outcomes from these infants suggest that the disappearance of key Bifidobacterium may contribute to the development of atopy.}, }
@article {pmid40396729, year = {2025}, author = {Cunningham, AL and Zhbannikov, IY and Myers, R and Tran, TH and Gao, W and Lemon, KP and Aquino, JN and Hurst, JH and Yoon, JW and Seed, PC and Kelly, MS}, title = {Genome mining identifies a diversity of natural product biosynthetic capacity in human respiratory Corynebacterium strains.}, journal = {mSphere}, volume = {10}, number = {6}, pages = {e0025825}, doi = {10.1128/msphere.00258-25}, pmid = {40396729}, issn = {2379-5042}, mesh = {*Corynebacterium/genetics/metabolism/classification ; Humans ; *Genome, Bacterial ; *Biological Products/metabolism ; Multigene Family ; *Biosynthetic Pathways/genetics ; Genomics ; *Respiratory System/microbiology ; Microbiota ; Phylogeny ; }, abstract = {Corynebacterium species, integral to the healthy human upper respiratory tract (URT) microbiota, remain underexplored in microbial genomics for their potential to promote respiratory health and exclude pathobionts. This genomic study investigated the diversity and capacity for natural product synthesis within these species, as indicated by their biosynthetic gene clusters (BGCs). We aimed to map and quantify the BGC diversity in a contemporary collection of Corynebacterium strains, representative of their prevalence in the respiratory microbiota, and to elucidate intra- and interspecies variation in BGC content. The outcomes of this research could reveal key factors in maintaining the ecological balance of the upper respiratory tract and identify novel antimicrobial agents targeting respiratory pathobionts. Employing an in silico approach, we analyzed the biosynthetic potential of respiratory strains of non-diphtheriae Corynebacterium species and their reference genomes through genome sequencing and antiSMASH6 analysis. Among 161 genomes, we identified 672 BGCs, 495 of which were unique, including polyketide synthase, non-ribosomal peptide synthetase, ribosomally synthesized and post-translationally modified peptide, and siderophore families. To understand how this biosynthetic capacity compared to other respiratory bacteria, we then downloaded genomes from eight species that are associated with the URT and conducted BGC searches. We found that despite their compact genomes, Corynebacterium species possess a multitude of predicted BGCs, exceeding the diversity of natural product BGCs identified in multiple other respiratory bacteria. This research lays the foundation for future functional genomics studies on the role of Corynebacterium species in the respiratory microbiome and the discovery of novel therapeutics derived from this bacterial genus.IMPORTANCEBacterial secondary metabolites, produced by enzymes encoded by biosynthetic gene clusters, are ecologically important for bacterial communication and competition in nutrient-scarce environments and are a historically rich source of antibiotics and other medications. Human-associated Corynebacterium species, abundant in the healthy upper respiratory tract, are understudied despite evidence of their roles in promoting human health and preventing pathobiont colonization. Through genome mining of a large collection of Corynebacterium strains isolated from the human respiratory tract and publicly available genomes of other respiratory bacteria, our study suggests that Corynebacterium species have a high biosynthetic capacity and are predicted to harbor a wide range of biosynthetic gene cluster families. These findings substantially expand current knowledge regarding the production of secondary metabolites by human-associated Corynebacterium species. Our study also lays the foundations for understanding how Corynebacterium species interact in the healthy human upper respiratory tract and the potential for discovering novel biotherapeutics.}, }
@article {pmid40372056, year = {2025}, author = {Kok, CR and Thissen, JB and Cerroni, M and Tribble, DR and Cancio, A and Tran, S and Schofield, C and Colombo, RE and Troth, T and Joya, C and Lalani, T and Be, NA}, title = {Field expedient stool collection methods for gut microbiome analysis in deployed military environments.}, journal = {mSphere}, volume = {10}, number = {6}, pages = {e0081824}, doi = {10.1128/msphere.00818-24}, pmid = {40372056}, issn = {2379-5042}, support = {//Lawrence Livermore National Laboratory/ ; }, mesh = {Humans ; *Feces/microbiology ; *Gastrointestinal Microbiome ; *Specimen Handling/methods ; *Military Personnel ; Adult ; Male ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Young Adult ; Diarrhea/microbiology ; Middle Aged ; Travel ; }, abstract = {Field expedient devices and protocols for the collection, storage, and shipment of stool samples in deployed settings are needed for the advancement of microbiome research in military health. Relevant assessments include the evaluation of microbiome signatures associated with susceptibility to travelers' diarrhea and recovery of gut function following infection. However, inherent biases in microbial measurements due to preservatives and sampling methods are unclear and should be assessed for an accurate evaluation of the microbiome. We performed shotgun metagenomic sequencing and compared the microbiome composition in paired fecal samples collected using Flinters Technology Associates (FTA) cards and OMNIgene (OG) Gut tubes, prior to and during international travel, from 49 adult participants, 39 of whom remained asymptomatic and 10 experienced travelers' diarrhea. Higher concentrations of nucleic acid and sequencing libraries were observed in OG samples. A majority of genera (82.9%) were detected with both methods, and detections of genera limited to one collection method were not highly prevalent across samples and were present in extremely low relative abundances (<0.01%). Differences in beta diversity were largely explained by inter-individuality of microbiome composition, followed by the effect of collection method and timepoint-disease states. Differential abundance analysis indicated that Corynebacterium and Blautia were consistently higher in abundance across all groups with FTA and OG collection, respectively. The observed differences in microbiome composition between methods suggest the need for consistent and standardized protocols within a study. Overall, the data presented here could help guide the future design of fecal microbiome study protocols in field and military deployment settings.IMPORTANCEThe assessment of field-deployable methods for fecal sample collection and storage is required to reliably capture samples collected in remote and austere locations. This study describes a comparative metagenomics analysis between samples collected by two different commercially available methods in a military-deployed setting. The results presented here are foundational for the future design of fecal microbiome study protocols in an operational context.}, }
@article {pmid40366139, year = {2025}, author = {Crouch, AL and Severance, BM and Creary, S and Hood, D and Bailey, M and Mejias, A and Ramilo, O and Gillespie, M and Ebelt, S and Sheehan, V and Kopp, BT and Anderson, MZ}, title = {Altered nasal and oral microbiomes define pediatric sickle cell disease.}, journal = {mSphere}, volume = {10}, number = {6}, pages = {e0013725}, doi = {10.1128/msphere.00137-25}, pmid = {40366139}, issn = {2379-5042}, support = {Advancing Research in Infection and Immunity//The Ohio State University/ ; Science Diversity Leadership Award//Chan Zuckerberg Initiative (CZI)/ ; T32 Interdisciplinary Program in Microbe-Host Biology//The Ohio State University/ ; NIAIDR21AI174000/NH/NIH HHS/United States ; Center for Ethnic Studies research grant//The Ohio State University/ ; }, mesh = {Humans ; *Anemia, Sickle Cell/microbiology ; *Microbiota ; Child ; Male ; Female ; *Mouth/microbiology ; Dysbiosis/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Adolescent ; Child, Preschool ; Metagenomics ; *Nose/microbiology ; }, abstract = {UNLABELLED: Sickle cell disease (SCD) is a chronic blood disorder that disrupts multiple organ systems and can lead to severe morbidity. Persistent and acute symptoms caused by immune system dysregulation in individuals with SCD could contribute to disease either directly or indirectly via dysbiosis of commensal microbes and increased susceptibility to infection. Here, we explored the nasal and oral microbiomes of children with SCD (cwSCD) to uncover potential dysbiotic associations with the blood disorder. Microbiota collected from nasal and oral swabs of 40 cwSCD were compared to eight healthy siblings using shotgun metagenomic sequencing. Commensal taxa were present at similar levels in the nasal and oral microbiome of both groups. However, the nasal microbiomes of cwSCD contained a higher prevalence of Pseudomonadota species, including pathobionts such as Yersinia enterocolitica and Klebsiella pneumoniae. Furthermore, the oral microbiome of cwSCD displayed lower α-diversity and fewer commensal and pathobiont species compared to the healthy siblings. Thus, subtle but notable shifts seem to exist in the nasal and oral microbiomes of cwSCD, suggesting an interaction between SCD and the microbiome that may influence health outcomes.<br><br>IMPORTANCE: The oral and nasal cavities are susceptible to environmental exposures including pathogenic microbes. In individuals with systemic disorders, antibiotic exposure, changes to the immune system, or changes to organ function could influence the composition of the microbes at these sites and the overall health of individuals. Children with sickle cell disease (SCD) commonly experience respiratory infections, such as pneumonia or sinusitis, and may have increased susceptibility to infection because of disrupted microbiota at these body sites. We found that children with SCD (cwSCD) had more pathobiont bacteria in the nasal cavity and reduced bacterial diversity in the oral cavity compared to their healthy siblings. Defining when, why, and how these changes occur in cwSCD could help identify specific microbial signatures associated with susceptibility to infection or adverse outcomes, providing insights into personalized treatment strategies and preventive measures.}, }
@article {pmid40358144, year = {2025}, author = {Mukherjee, SD and Suryavanshi, M and Knight, J and Lange, D and Miller, AW}, title = {Metagenomic and phylogenetic analyses reveal gene-level selection constrained by bacterial phylogeny, surrounding oxalate metabolism in the gut microbiota.}, journal = {mSphere}, volume = {10}, number = {6}, pages = {e0091324}, doi = {10.1128/msphere.00913-24}, pmid = {40358144}, issn = {2379-5042}, mesh = {*Oxalates/metabolism ; *Phylogeny ; *Gastrointestinal Microbiome/genetics ; Humans ; *Metagenomics ; *Bacteria/genetics/classification/metabolism ; *Selection, Genetic ; }, abstract = {The gut microbiota is critical for neutralizing dietary toxins. Oxalate is a toxin commonly produced by plants to deter herbivory and is widely consumed in the human diet. Excess levels of systemic or urinary oxalate increase risk of multiple urologic and cardiometabolic diseases. The current study employed multiple amplicon-based and shotgun metagenomic methodologies, alongside comparative phylogenetic analyses, to interrogate evolutionary radiation surrounding microbial oxalate degradation within the human gut microbiome. In conservative genome-based estimates, over 30% of gut microbial species harbored at least one oxalate-handling gene, with the specific pathways used dependent on bacterial phylum. Co-occurrence analyses revealed interactions between specialist genes that can metabolize oxalate or its by-products, but not multi-functional genes that can act in more than one oxalate-related pathway. Specialization was rare at the genome level. Amplicon-based metagenomic sequencing of the oxalate-degrading gene, formyl-CoA transferase (frc), coupled with molecular clock phylogenetic analyses are indicative of rapid evolutionary divergence, constrained by phylum. This was corroborated by paired analyses of non-synonymous to synonymous substitutions (dN/dS ratios), which pointed toward neutral to positive selection. Sequence similarity network analyses of frc sequences suggest extensive horizontal gene transferring has occurred with the frc gene, which may have facilitated rapid divergence. The frc gene was primarily allocated to the Pseudomonodota phylum, particularly the Bradyrhizobium genus, which is a species capable of utilizing oxalate as a sole carbon and energy source. Collectively evidence provides strong support that, for oxalate metabolism, evolutionary selection occurs at the gene level, through horizontal gene transfer, rather than at the species level.IMPORTANCEA critical function of the gut microbiota is to neutralize dietary toxins, such as oxalate, which is highly prevalent in plant-based foods and is not degraded by host enzymes. However, little is known about the co-evolutionary patterns of plant toxins and the mammalian gut microbiota, which are expected to exhibit features of an evolutionary arms race. In the current work, we present molecular evidence that microbial genes for oxalate degradation are highly prevalent in humans, potentially driven by extensive horizontal gene transfer events. Phylogenetic analyses reveal that oxalate-degrading genes are under a positive selection pressure and have historically undergone rapid diversification events, which has led to diverse ecological strategies for handling oxalate by gut bacteria. Collectively, data shed light on potential evolutionary relationships between the diet and the gut microbiota that occur relatively independently of the mammalian host.}, }
@article {pmid40355744, year = {2025}, author = {Schreiber, S and Waetzig, GH and López-Agudelo, VA and Geisler, C and Schlicht, K and Franzenburg, S and di Giuseppe, R and Pape, D and Bahmer, T and Krawczak, M and Kokott, E and Penninger, JM and Harzer, O and Kramer, J and von Schrenck, T and Sommer, F and Zacharias, HU and ,  and Millet Pascual-Leone, B and Forslund, SK and Heyckendorf, J and Aden, K and Hollweck, R and Laudes, M and Rosenstiel, P}, title = {Nicotinamide modulates gut microbial metabolic potential and accelerates recovery in mild-to-moderate COVID-19.}, journal = {Nature metabolism}, volume = {7}, number = {6}, pages = {1136-1149}, pmid = {40355744}, issn = {2522-5812}, support = {EXC 2167: CD-1, CD-2, TI-1//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; EXC 2167//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; EXC 2167: RTF-VI//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; miTARGET (RU5042)//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; SO1141/10-1//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; SFB1470, SFB1449//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; EXC 2167: CD-2, RTF-VI, TI-1//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; e:Med Juniorverbund "Try-IBD" 01ZX1915A and 01ZX2215, e:Med Network iTREAT 01ZX2202A//Bundesministerium f&#xfc;r Bildung und Forschung (Federal Ministry of Education and Research)/ ; e:Med CKDNapp 01ZX1912A//Bundesministerium f&#xfc;r Bildung und Forschung (Federal Ministry of Education and Research)/ ; K126408//Christian-Albrechts-Universit&#xe4;t zu Kiel (Christian-Albrechts-University Kiel)/ ; }, mesh = {Humans ; *Niacinamide/therapeutic use/pharmacology ; *Gastrointestinal Microbiome/drug effects ; Male ; Double-Blind Method ; *COVID-19/metabolism ; Female ; Middle Aged ; SARS-CoV-2 ; *COVID-19 Drug Treatment ; Adult ; Feces/microbiology ; Prospective Studies ; Aged ; Dysbiosis ; Tryptophan/metabolism ; }, abstract = {Cellular NAD[+] depletion, altered tryptophan metabolism and gut microbiome dysbiosis are associated with disease progression and unfavourable clinical outcomes in COVID-19. Here, we show that supplementing tryptophan metabolism with nicotinamide alleviates COVID-19 symptoms. We evaluate a 4-week intervention with a novel nicotinamide formulation (1,000 mg) in a prospective, double-blind, randomized, placebo-controlled trial in 900 symptomatic outpatients with PCR-proven COVID-19. In the primary analysis population of participants at risk for severe COVID-19, 57.6% of those receiving nicotinamide and 42.6% receiving placebo recover from their performance drop at week 2 (P = 0.004). Nicotinamide is also beneficial for returning to normal activities (P = 0.009). Effects on gut metagenomic signatures parallel clinical efficacy, suggesting that nicotinamide influences COVID-19-associated faecal microbiome changes. After 6 months, responders to nicotinamide in acute COVID-19 show fewer post-COVID symptoms than placebo responders (P = 0.010). No relevant safety signals are observed. Overall, our results show that nicotinamide leads to faster recovery of physical performance and modulates COVID-19-associated faecal microbiome changes.}, }
@article {pmid40340458, year = {2025}, author = {Bay, L and Barnes, CJ and Fritz, BG and Ravnborg, N and Ruge, IF and Halling-Sønderby, A-S and Søeborg, SR and Langhoff, KH and Lex, C and Hansen, AJ and Thyssen, JP and Bjarnsholt, T}, title = {Unique dermal bacterial signature differentiates atopic dermatitis skin from healthy.}, journal = {mSphere}, volume = {10}, number = {6}, pages = {e0015625}, doi = {10.1128/msphere.00156-25}, pmid = {40340458}, issn = {2379-5042}, support = {LF-OC-19-0003//LEO Fondet (LEO Foundation)/ ; LF17067//LEO Fondet (LEO Foundation)/ ; LF17067//LEO Fondet (LEO Foundation)/ ; }, mesh = {Humans ; *Dermatitis, Atopic/microbiology ; Adult ; *Microbiota ; Female ; Male ; *Skin/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Middle Aged ; Metagenomics ; Young Adult ; Epidermis/microbiology ; Case-Control Studies ; *Dermis/microbiology ; }, abstract = {UNLABELLED: Gaining a deeper understanding of the variation in skin microbiota across habitats and layers provides critical insights into the complex host-microbial interactions that drive inflammatory skin diseases. Our study investigated dermal versus epidermal microbiota in lesional and non-lesional skin of 37 adult atopic dermatitis (AD) patients and 37 healthy controls. Skin biopsies were partitioned into epidermal and dermal compartments, while serial tape strips collected the superficial epidermis. Bacterial communities were analyzed by cultivation, matrix-assisted laser desorption ionization time-of-flight mass spectrometry, confocal laser scanning microscopy, and metagenomic sequencing. We found that the effects of AD were evident across skin layers. The natural variation between skin layers and habitats diminishes in AD-affected skin, intensifying the impact of the microenvironment and host factors. A remarkably distinct dermal bacterial community was discovered among AD patients, being more conserved and providing a clearer difference between skin habitats, while the epidermis varied substantially. Importantly, comparisons between AD patients and controls revealed more genera differed when studying the dermal samples than the epidermal ones. Staphylococcus, Corynebacterium, and Cutibacterium genera differed with AD status across all samples, but Prevotella and Mitsuokella only differed in the dermis. In the dry and moist dermis, this translated into 14 and 61 gene pathways significantly varying with AD status, including many related to the biosynthesis of menaquinones (vitamin K2). These results suggest dermal sampling would allow for the role of the skin microbiome within AD pathogenesis to be better resolved since these communities are simpler and less prone to environmental contamination.<br><br>IMPORTANCE: This study sheds light on the profound impact of skin microbiota's complex composition and distribution in atopic dermatitis (AD). The distinctive bacterial profile and activity, especially within the dermal skin compartment, vividly mirrored the cutaneous conditions in this inflamed microenvironment. The striking similarity in bacterial communities across different skin habitats in atopic skin underscores the high influence of atopic dermatitis-the genetic predisposition to an amplified immune response. This finding suggests that the dermal bacterial profile could be a valuable tool for longitudinally monitoring changes during the disease's relapsing phases, allowing for a precise categorization of patients into specific AD endotypes. Broadening the focus throughout the entire eczema-affected skin paves the way for treatments capable of modulating dermal biological factors, offering more effective management of AD. By further centering the interest in host-microbial interactions, we can refine personalized treatments, ultimately improving the lives of millions suffering from atopic dermatitis.}, }
@article {pmid40320901, year = {2025}, author = {Gervasoni, KN and Iacia, MVMS and Silva, KO and Franco, LG and Mendes, MEF and Neves, TJDC and Sanches, WS and Oliveira, LB and Saito, EA and Vieira, KCO and Pereira, VC and Nai, GA and Winkelstroter, LK}, title = {Protective Effect of Piperine on Indomethacin-Induced Intestinal Damage.}, journal = {Molecular nutrition &amp; food research}, volume = {69}, number = {12}, pages = {e70097}, doi = {10.1002/mnfr.70097}, pmid = {40320901}, issn = {1613-4133}, mesh = {Animals ; *Polyunsaturated Alkamides/pharmacology ; *Piperidines/pharmacology ; *Alkaloids/pharmacology ; *Benzodioxoles/pharmacology ; Male ; *Indomethacin/adverse effects/toxicity ; Mice ; Gastrointestinal Microbiome/drug effects ; *Anti-Inflammatory Agents, Non-Steroidal/adverse effects ; Intestine, Small/drug effects/pathology ; Intestinal Mucosa/drug effects/pathology ; Aspartate Aminotransferases/blood ; Protective Agents/pharmacology ; Intestines/drug effects/pathology ; }, abstract = {Nonsteroidal antiinflammatory drugs (NSAIDs) are widely prescribed for the treatment of inflammation and chronic pain. Chronic use of NSAIDs is associated with adverse events and organ damage, especially to the gastric mucosa and small intestine. This study evaluates the protective effect of piperine on indomethacin-induced intestinal damage. Eighteen male Mus musculus mice, aged 6-8 weeks, were used. Intestinal damage was induced with indomethacin (10 mg/mL) and cotreatment with piperine (20 mg/mL), both administered orally. After 14 days, the animals were euthanized. Biochemical serological analysis was performed. Intestinal inflammation was assessed based on macroscopic, histopathological, and metagenomic analyses. Histopathological analysis showed a reduction in small intestine inflammation (p < 0.05) and the disappearance of necrosis in the intestinal wall of the large intestine. Crypt and villus measurements showed increased values in the piperine-treated group (p < 0.05). An approximately six-fold increase in aspartate aminotransferase (AST) was observed in the Indomethacin group (p < 0.05). Regarding the intestinal microbiota, an increase in genus diversity was observed in the piperine-treated group (p < 0.05). There was a 50% reduction in micronucleus formation with the administration of piperine 20 mg/kg (p < 0.05). It was concluded that cotreatment with piperine has great potential in mitigating the side effects caused by NSAIDs.}, }
@article {pmid40172109, year = {2025}, author = {Tarracchini, C and Lordan, C and Milani, C and Moreira, LPD and Alabedallat, QM and de Moreno de LeBlanc, A and Turroni, F and Lugli, GA and Mancabelli, L and Longhi, G and Brennan, L and Mahony, J and LeBlanc, JG and Nilaweera, KN and Cotter, PD and van Sinderen, D and Ventura, M}, title = {Vitamin biosynthesis in the gut: interplay between mammalian host and its resident microbiota.}, journal = {Microbiology and molecular biology reviews : MMBR}, volume = {89}, number = {2}, pages = {e0018423}, doi = {10.1128/mmbr.00184-23}, pmid = {40172109}, issn = {1098-5557}, support = {12/RC/2273/SFI_/Science Foundation Ireland/Ireland ; 16/SP/3827/SFI_/Science Foundation Ireland/Ireland ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Animals ; *Vitamins/biosynthesis ; *Bacteria/metabolism/genetics ; *Gastrointestinal Tract/microbiology/metabolism ; Mammals/microbiology ; *Host Microbial Interactions ; }, abstract = {SUMMARYIn recent years, exhaustive efforts have been made to dissect the composition of gut-associated microbial communities and associated interactions with their human host, which are thought to play a crucial role in host development, physiology, and metabolic functions. Although such studies were initially focused on the description of the compositional shifts in the microbiota that occur between different health conditions, more recently, they have provided key insights into the functional and metabolic contributions of the gut microbiota to overall host physiology. In this context, an important metabolic activity of the human gut microbiota is believed to be represented by the synthesis of various vitamins that may elicit considerable benefits to human health. A growing body of scientific literature is now available relating to (predicted) bacterial vitamin biosynthetic abilities, with ever-growing information concerning the prevalence of these biosynthetic abilities among members of the human microbiota. This review is aimed at disentangling if and how cooperative trophic interactions of human microbiota members contribute to vitamin production, and if such, gut microbiota-mediated vitamin production varies according to different life stages. Moreover, it offers a brief exploration of how different diets may influence vitamin production by shaping the overall composition and metabolic activity of the human gut microbiota while also providing preliminary insights into potential correlations between human microbiota-associated vitamin production and the occurrence of human diseases and/or metabolic disorders.}, }
@article {pmid40555025, year = {2025}, author = {Lin, Z and Pang, S and Wu, Y and Xu, T and Zhou, YL and Li, H and Zhang, C and Qian, PY and Zhang, S}, title = {Biodiversity and nitrogen metabolism in the plastisphere impacted by urban nitrogen loading from a coastal mega-city.}, journal = {Journal of hazardous materials}, volume = {495}, number = {}, pages = {139012}, doi = {10.1016/j.jhazmat.2025.139012}, pmid = {40555025}, issn = {1873-3336}, abstract = {The plastisphere, recognized for vast biomass and critical role in nitrogen cycling, is becoming a pertinent component of marine ecosystems. The relationship between plastisphere and increased nitrogen inputs from urban wastewater in coastal zones remains poorly understood. Through metagenomics, metatranscriptomics and metabolomics, this research sought to elucidate the plastisphere's reaction to elevated nitrogen loading and pinpoint key microbial resources that can be harnessed. Although the archaeal community composition within the plastisphere remains largely unchanged by nitrogen loading, bacterial diversity experiences a substantial boost, which is inversely correlated with fungal diversity. Furthermore, such conditions are associated with reduced intricate microbial interactions. Moreover, the plastisphere subjected to nitrogen loading shows an enrichment of genera and genes implicated in ammonium assimilation, denitrification and dissimilatory nitrate reduction to ammonium (DNRA). Metabolomics analysis highlighted the plastisphere's accumulation of L-glutathione oxidized (GSSG) in response to nitrogen loading. The research further highlighted a quartet of microbial phyla-Actinomycetota, Bacteroidota, Cyanobacteriota, and Pseudomonadota-that not only thrive but also constitute pivotal microbial resources within the plastisphere when confronted with strong nitrogen loading. In essence, this investigation illuminates the plastisphere's biodiversity dynamics and nitrogen metabolic adjustments during augmented nitrogen loading and offers novel perspectives on taking advantage of the plastisphere's untapped microbial potential.}, }
@article {pmid40553325, year = {2025}, author = {Mukhopadhyay, S and Ulaganathan, N and Dumpuri, P and Aich, P}, title = {Integrative AI-Based Approaches to Connect the Multiome to Use Microbiome-Metabolome Interactive Outcome as Precision Medicine.}, journal = {Methods in molecular biology (Clifton, N.J.)}, volume = {2952}, number = {}, pages = {15-37}, pmid = {40553325}, issn = {1940-6029}, mesh = {Humans ; *Precision Medicine/methods ; *Metabolomics/methods ; *Metabolome ; Metagenomics/methods ; *Microbiota ; *Artificial Intelligence ; Computational Biology/methods ; Gastrointestinal Microbiome ; }, abstract = {In the era of Genome-Wide Association Studies (GWAS), biologists have unprecedented access to vast datasets, mirrored in the wealth of information from various omics studies, including genomics, transcriptomics, proteomics, metabolomics, and metagenomics. Integrating diverse data sources has emerged as crucial in unravelling the intricacies of biological processes. This chapter delves into our method for merging various omics methodologies, emphasizing metabolomics and metagenomics data. A powerful strategy addresses data processing challenges and opens new avenues for personalized microbiome-based interventions. The combined analysis of host and microbial metabolomics and metagenomics data has significantly advanced our understanding in diagnosing and treating conditions such as inflammatory bowel disease and irritable bowel syndrome. Metabolic signatures in biological fluids and their microbial counterparts serve as indicators, differentiating health from disease. The sheer volume of data demands sophisticated automated tools for processing and interpretation. Recognizing this need, integrating artificial intelligence (AI) and data science has become increasingly prominent. In this chapter, we combine microbiome and metabolome analyses through publicly available models to elucidate the correlations between microbial and metabolic profiles. By harnessing AI models across various omics data sources, this chapter bridges the gap between data acquisition and clinical applications, paving the way for personalized interventions and optimizing individual health.}, }
@article {pmid40552763, year = {2025}, author = {Claypool, J and Lindved, G and Myers, PN and Ward, T and Nielsen, HB and Blount, KF}, title = {Microbiome compositional changes and clonal engraftment in a phase 3 trial of fecal microbiota, live-jslm for recurrent Clostridioides difficile infection.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2520412}, doi = {10.1080/19490976.2025.2520412}, pmid = {40552763}, issn = {1949-0984}, mesh = {Humans ; *Clostridium Infections/therapy/microbiology ; *Fecal Microbiota Transplantation ; *Gastrointestinal Microbiome ; *Feces/microbiology ; Male ; *Clostridioides difficile/physiology ; Female ; Middle Aged ; *Bacteria/classification/genetics/isolation &amp; purification ; Adult ; Recurrence ; Aged ; }, abstract = {Live microbiota therapies have shown promise in many gastrointestinal diseases, including in the prevention of recurrent Clostridioides difficile infections (rCDI); however, frameworks for their pharmacokinetic and pharmacodynamic analysis are not fully established. Fecal microbiota, live-jslm (RBL) is the first microbiota-based product approved by the US Food and Drug Administration for the prevention of rCDI and was superior to placebo in the PUNCH™ CD3 phase 3 clinical trial (NCT03244644). In this analysis, deep shotgun metagenomic sequencing was used to assess changes in gut microbiome compositions of participants and engraftment of bacterial clonal populations (i.e. strains) from RBL to recipients. Among RBL responders, gut microbiota shifted toward compositions that resembled healthy donors as early as 1 week after RBL administration; the resulting microbiota compositions included clonal populations that engrafted from RBL to recipients. Engraftment was higher in RBL responders compared with non-responders, and many clonally engrafted populations persisted for ≥ 6 months. Bacteroidia species were among the most effectively engrafted species from RBL. This study utilizes data from a large clinical trial to establish a method with high specificity for exploring clonal engraftment from microbiota-based treatments to facilitate future pharmacokinetic and pharmacodynamic analyses.Clinicaltrials Registration: NCT03244644.}, }
@article {pmid40550680, year = {2025}, author = {Lin, M and Hu, L and Hao, L and Wang, Z}, title = {[Microbiome and its genetic potential for carbon fixation in small urban wetlands].}, journal = {Sheng wu gong cheng xue bao = Chinese journal of biotechnology}, volume = {41}, number = {6}, pages = {2415-2431}, doi = {10.13345/j.cjb.240399}, pmid = {40550680}, issn = {1872-2075}, mesh = {*Wetlands ; *Microbiota/genetics ; *Carbon Cycle/genetics ; *Bacteria/genetics/metabolism/classification ; RNA, Ribosomal, 16S/genetics ; China ; Cities ; Geologic Sediments/microbiology ; Archaea/genetics/metabolism/classification ; Metagenomics ; Metagenome ; }, abstract = {Small urban wetlands are widely distributed and susceptible to human activities, serving as important sources and sinks of carbon. Microorganisms play a crucial role in carbon cycle, while limited studies have been conducted on the microbial diversity in small urban wetlands and the functions of microbiome in carbon fixation and metabolism. To probe into the microbiome-driven carbon cycling in small urban wetlands and dissect the composition and functional groups of microbiome, we analyzed the relationships between the microbiome structure, element metabolism pathways, and habitat physicochemical properties in sediment samples across three small wetlands in Huzhou City, and compared them with natural wetlands in the Zoige wetland. High-throughput sequencing of 16S rRNA gene amplicons and metagenomics was employed to determine the species and functional groups. Sixty medium to high-quality metagenome-assembled genomes (MAGs) were constructed, including 55 bacterial and 5 archaeal taxa, and their potential in driving elemental cycles were analyzed, with a focus on carbon fixation. Several bacterial species were found to encode a nearly complete carbon fixation pathway, including the Calvin cycle, the reductive tricarboxylic acid cycle, the Wood-Ljungdahl pathway, and the reductive glycine pathway. There were several potential novel carbon-fixing bacterial members, such as those belonging to Syntrophorhabdus (Desulfobacterota) and UBA4417 (Bacteroidetes), which had high relative abundance in the wetland microbiome. Unveiling the genetic potential of these functional groups to facilitate element cycling is of great scientific importance for enhancing the carbon sequestration capacity of small urban wetlands.}, }
@article {pmid40550672, year = {2025}, author = {Wang, X and Wang, S and Yang, K and Tang, Y and Xu, Y and Shen, Q and Wei, Z}, title = {[Methodological breakthroughs and challenges in research of soil phage microecology].}, journal = {Sheng wu gong cheng xue bao = Chinese journal of biotechnology}, volume = {41}, number = {6}, pages = {2310-2323}, doi = {10.13345/j.cjb.250258}, pmid = {40550672}, issn = {1872-2075}, mesh = {*Bacteriophages/genetics/isolation &amp; purification/physiology ; *Soil Microbiology ; Ecosystem ; Microbiota ; Metagenomics/methods ; }, abstract = {Phages, as obligate bacterial and archaeal parasites, constitute a virus group of paramount ecological significance due to their exceptional abundance and genetic diversity. These biological entities serve as critical regulators in Earth's ecosystems, driving biogeochemical cycles, energy fluxes, and ecosystem services across terrestrial and marine environments. Within soil microbiomes, phages function as microbial "dark matter," maintaining the soil-plant system balance through precise modulation of the microbial community structure and functional dynamics. Despite the growing research interests in soil phages in recent years, the proportion of such studies in environmental virology remains disproportionately low, which is primarily attributed to researchers' limited familiarity with the research methodologies for phage microecology, incomplete technical frameworks, and inherent challenges posed by soil environmental complexity. To address these challenges, this review synthesizes cutting-edge methodologies for soil phage investigation from four aspects: (1) tangential flow filtration (TFF)-based phage enrichment strategies; (2) integrated quantification approaches combining double-layer agar plating, epifluorescence microscopy, and flow cytometry; (3) multi-omics analytical pipelines leveraging metagenomics and viromics datasets; and (4) computational frameworks merging machine learning algorithms with eco-evolutionary theory for deciphering phage-host interaction networks. Through comparative analysis of methodological principles, technical merits, and application scopes, we establish a comprehensive workflow for soil phage research. Future research in this field should prioritize: (1) construction of soil phage resource libraries, (2) exploration of RNA phages based on transcriptomes, (3) functional characterization of unknown genes, and (4) deep integration and interaction validation of multi-omics data. This systematic methodological synthesis provides critical technical references for addressing fundamental challenges in characterizing soil phages regarding the community structure, functional potential, and interaction mechanisms with hosts.}, }
@article {pmid40548332, year = {2025}, author = {Pita, L and Maldonado, M and Koutsouveli, V and Riesgo, A and Hentschel, U and Oatley, G and Sinclair, E and Aunin, E and Gettle, N and Santos, C and Paulini, M and Niu, H and McKenna, V and O'Brien, R and ,  and ,  and ,  and ,  and , }, title = {The chromosomal genome sequence of the kidney sponge, Chondrosia reniformis Nardo, 1847, and its associated microbial metagenome sequences.}, journal = {Wellcome open research}, volume = {10}, number = {}, pages = {283}, pmid = {40548332}, issn = {2398-502X}, abstract = {We present a genome assembly from a specimen of Chondrosia reniformis (kidney sponge; Porifera; Demospongiae; Chondrillida; Chondrillidae). The genome sequence has a total length of 117.37 megabases. Most of the assembly (99.98%) is scaffolded into 14 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 17.45 kilobases in length. Several symbiotic bacterial genomes were assembled as MAGs. Gene annotation of the host organism assembly on Ensembl identified 17,340 protein-coding genes. The metagenome of the specimen was also assembled and 53 binned bacterial genomes were identified, including 40 high-quality MAGs that were representative of a typical high microbial abundance sponge and included three candiate phyla (Poribacteria, Latescibacteria, Binatota).}, }
@article {pmid40544519, year = {2025}, author = {Yu, X and Liang, J and Yang, R and Gai, W and Zheng, Y}, title = {Clinical Features and Value of Tracheal Aspirate Metagenomic Next-Generation Sequencing for Severe Pneumonia in Children in Pediatric Intensive Care Unit.}, journal = {Polish journal of microbiology}, volume = {74}, number = {2}, pages = {192-205}, doi = {10.33073/pjm-2025-016}, pmid = {40544519}, issn = {2544-4646}, mesh = {Humans ; Infant ; *High-Throughput Nucleotide Sequencing ; Male ; Child, Preschool ; Female ; *Metagenomics/methods ; Child ; Intensive Care Units, Pediatric ; *Trachea/microbiology ; *Pneumonia/microbiology/diagnosis/virology ; Microbiota/genetics ; Bacteria/genetics/classification/isolation &amp; purification ; Coinfection/microbiology ; }, abstract = {Pneumonia is a leading cause of mortality in children. While metagenomic next-generation sequencing (mNGS) has the potential to detect all the microorganisms in pneumonia patients, the relationship between these microorganisms and the patients' clinical characteristics remains to be established. Fifty-five children, diagnosed with severe pneumonia and undergoing tracheal aspirate (TA) mNGS for pathogen detection at The Heilongjiang Hospital of Beijing Children's Hospital between July 2021 and November 2022, were included in this study. The clinical characteristics, pathogen distribution, and microbiome features of these children were analyzed. Results showed that the rate of mixed infections was notably high (80%, 44/55), with bacterial-viral infections being the most common. Streptococcus pneumoniae, Mycoplasma pneumoniae (MP), Candida albicans, and Respiratory syncytial virus (RSV) were the most common pathogens in this cohort. Furthermore, RSV and S. pneumoniae were the most prevalent pathogens in children younger than 12 months (infants), while MP and Haemophilus influenzae were more commonly identified in children between 12 and 144 months. Increased richness and diversity of the microbiota were observed in the TA of the older children. Linear discriminant analysis (LDA) effect size (LEfSe) analysis identified that RSV and Streptococcus mitis were the specific species associated with infants. In contrast, Human bocaparvovirus 1 and Prevotella histicola were significantly enriched in the older children. In addition, the top 20 most abundant species exhibited correlations with neutrophil count and C-reactive protein. This study emphasizes the significance of employing mNGS to understand better the clinical characteristics and microbial diversity in pediatric patients with severe pneumonia.}, }
@article {pmid40542451, year = {2025}, author = {Ji, S and Ahmad, F and Peng, B and Yang, Y and Su, M and Zhao, X and Vatanen, T}, title = {Engrafting gut bacteriophages have potential to modulate microbial metabolism in fecal microbiota transplantation.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {149}, pmid = {40542451}, issn = {2049-2618}, support = {U22A20365//Joint Funds of National Natural Science Foundation of China/ ; T2341019//National Natural Science Foundation of China/ ; 2023A1515012429//Natural Science Foundation of Guangdong Province/ ; 2024B03J1343//Guangzhou Science and Technology Plan Project/ ; }, mesh = {*Fecal Microbiota Transplantation/methods ; Humans ; *Bacteriophages/genetics/classification/physiology/isolation &amp; purification ; *Gastrointestinal Microbiome ; Feces/microbiology/virology ; *Clostridium Infections/therapy/microbiology ; Clostridioides difficile/virology ; Bacteria/metabolism/virology/genetics/classification ; Metagenome ; }, abstract = {BACKGROUND: Fecal microbiota transplantation (FMT) is widely used to treat severe infections and investigated for the treatment of complex diseases. The therapeutic efficacy of FMT is related to the successful engraftment of bacteriophages from healthy donors to recipients. However, gut bacteriophage contributions to FMT engraftment and treatment outcomes remain unclear.<br><br>METHODS: The gut phageome from previously published metagenomes of donors and recipients across 23 FMT studies was assembled and functionally annotated for a meta-analysis.<br><br>RESULTS: Gut phageome profiles of FMT recipients, especially those with recurrent Clostridioides difficile infection (rCDI), shifted toward donor phageomes, accompanied by increased phageome alpha diversity. Engraftment of donor phages varied between recipient conditions with the highest engraftment rate, overrepresented by putative temperate phage, in patients with rCDI. Consistently, a higher proportion of auxiliary metabolic genes (AMGs), with the potential to support and modulate bacterial metabolism, were annotated on putative temperate phages.<br><br>CONCLUSIONS: FMT leads to significant taxonomic, functional, and lifestyle shifts in recipient phageome composition. Future FMT studies should include gut phageome characterization and consider it as a potential factor in microbial community shifts and treatment outcomes. Video Abstract.}, }
@article {pmid40542420, year = {2025}, author = {Yu, M and Chu, Y and Wang, Y and Mo, L and Tan, X and Guo, S and Yuan, S and Ma, Y}, title = {Metagenomic analysis reveals gut phage diversity across three mammalian models.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {146}, pmid = {40542420}, issn = {2049-2618}, support = {2024YFA0919400//National Key Research and Development Program of China/ ; 2024YFA0919400//National Key Research and Development Program of China/ ; 2024YFA0919400//National Key Research and Development Program of China/ ; B2302023//Shenzhen Medical Research Fund/ ; B2302023//Shenzhen Medical Research Fund/ ; KJZD20230923115859008//Shenzhen Science and Technology Program/ ; KJZD20230923115859008//Shenzhen Science and Technology Program/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; Swine ; *Bacteriophages/genetics/classification/isolation &amp; purification ; Mice ; Humans ; Macaca fascicularis/virology ; Metagenome ; Virome ; Phylogeny ; Models, Animal ; Feces/virology ; }, abstract = {BACKGROUND: The gut virome plays a pivotal role in shaping the host's microbiota. However, gut viruses across different mammalian models, and their connections with the human gut microbiota remain largely unknown.<br><br>RESULTS: We identified 977 high-confidence species-level viral operational taxonomic units (vOTUs) in mice (hcMGV), 12,896 in pigs (hcPGV), and 1480 in cynomolgus macaques (hcCMGV) from metagenomes, respectively. Clustering these vOTUs at approximately genus level uncovered novel clades with high prevalence across animal guts (>&#x2009;=&#x2009;60%). In particular, crAss-like phages and cas-harboring jumbophages were characterized. Comparative analysis revealed that hcCMGV had a closer relationship with hcPGV than hcMGV, despite the animal-specific characteristics, and that 55.88% hcCMGV had connections with the human microbiota.<br><br>CONCLUSIONS: Our findings shed light on the diversity of gut viruses across these three animals, contributing to future gut microbial studies using model animals. Video Abstract.}, }
@article {pmid40537892, year = {2025}, author = {Kang, J and Choi, Y and Keum, GB and Doo, H and Kwak, J and Kim, H and Chae, Y and Lee, S and Yang, H and Kim, S and Sun, X and Kim, HB and Yoo, SJ}, title = {Effect of Diet and Lifestyle Changes on Gut Microbial Diversity in Healthy Adolescents.}, journal = {Journal of microbiology and biotechnology}, volume = {35}, number = {}, pages = {e2503018}, doi = {10.4014/jmb.2503.03018}, pmid = {40537892}, issn = {1738-8872}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Adolescent ; RNA, Ribosomal, 16S/genetics ; *Life Style ; Feces/microbiology ; *Diet ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Female ; Biodiversity ; DNA, Bacterial/genetics ; Exercise ; Sequence Analysis, DNA ; }, abstract = {The human gut microbiome is a complex ecosystem shaped by both intrinsic and extrinsic factors, with external elements such as diet and exercise significantly influencing its diversity and composition. In this study, we evaluated gut microbiome shifts in adolescents participating in a four-week camp with controlled diets, lifestyle, and a healthy living environment. Stool samples were collected before and after the camp period and analyzed through 16S rRNA gene sequencing to assess changes in microbial composition and diversity. Post-intervention, gut microbiome diversity increased significantly, with notable changes in the relative abundance of taxa such as Lachnospira, Alistipes, and Barnesiella, which are associated with enhanced immune function and gut health. Additionally, functional prediction using PICRUSt indicated an increase in genes associated with energy production and metabolism, suggesting a broader functional impact of lifestyle modifications on gut microbial functionalities. These findings revealed the potential causal relationships between lifestyle modifications and gut microbiome shifts, providing valuable insights into the interactions between environment, diet, and the gut microbiota.}, }
@article {pmid40537448, year = {2025}, author = {Rudi, K and Nilsen, T and Pettersen, R and Keeley, NB and Ray, JL and Majaneva, S and Stokkan, M and Hervik, A and Angell, IL and Philip, M and Martin, J and Sundt, M&#xd8; and Snipen, LG}, title = {The Coastal Seafloor Microbiota Is Structured by Local Selection of Cosmopolitan Taxa.}, journal = {Environmental microbiology reports}, volume = {17}, number = {3}, pages = {e70123}, pmid = {40537448}, issn = {1758-2229}, support = {320076//Norges Forskningsr&#xe5;d/ ; }, mesh = {*Microbiota ; *Seawater/microbiology ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Iceland ; Norway ; *Archaea/genetics/classification/isolation &amp; purification/metabolism ; Metagenome ; Phylogeny ; Nitrates/metabolism ; Ecosystem ; }, abstract = {Understanding the assembly processes of the coastal seafloor microbiota is crucial for gaining insights into how ocean ecosystems work. In our study, we addressed the question about how local selection affects the global distribution of coastal seafloor microorganisms. We identified two main clusters of samples by examining the geographical distribution of 356 high-quality prokaryote metagenome-assembled genomes (MAGs) from 94 coastal samples collected along the Norwegian and Icelandic coasts. There was no identifiable correlation between the abundance of MAGs and the geographic distance between them central to the identified clusters (no distance decay). In contrast, noncentral MAGs demonstrate a pronounced distance decay. We also observed significant functional differences between the two sample clusters. One cluster showed enrichment in functions such as dissimilatory nitrate reduction to ammonium (DNRA), acetoclastic methanogenesis, thiosulphate conversion and acetate and butyrate metabolism. The other cluster was enriched in propionate metabolism, nitrite oxidation to nitrate and cobalamin-dependent carbon fixation. These results suggest that localised environmental selection acts on cosmopolitan taxa to shape seafloor microbiota. Our findings therefore profoundly impact the understanding of seafloor ecological processes and their management.}, }
@article {pmid40517714, year = {2025}, author = {Huang, H and Xiao, K and Shen, T and Chu, D and Xie, Z and Bi, Y and Ning, K and Yan, Y}, title = {The impact of enclosure management on the conservation and restoration of microbial community in a typical urban lake.}, journal = {The Science of the total environment}, volume = {989}, number = {}, pages = {179827}, doi = {10.1016/j.scitotenv.2025.179827}, pmid = {40517714}, issn = {1879-1026}, mesh = {*Lakes/microbiology ; *Microbiota ; *Conservation of Natural Resources/methods ; *Environmental Restoration and Remediation/methods ; China ; Ecosystem ; *Environmental Monitoring ; *Water Microbiology ; }, abstract = {Urban lake freshwater ecosystems, as vital lifelines intricately connected to human well-being, hosted microbes vital for biosynthetic and global biochemical cycles. Despite their ecological importance, current research has yet to fully elucidate how urban lake restoration efforts influence microbial diversity, community structure, and functional dynamics, leaving a significant gap in our understanding of the ecological outcomes of such interventions. Donghu Lake's ongoing restoration project employs enclosure management as a conservation strategy. To evaluate the impact of enclosure management on protecting and restoring microbial communities, we analyzed 72 metagenomic samples from the restoration waterbody. It was found that enclosure management profoundly reshaped microbial communities, making them more stable and similar to natural conditions, and boosting their biosynthetic gene encoding potential. Furthermore, research revealed antibiotic resistance genes (ARGs) tended to be preferentially hosted by specific microbes, identifying Gammaproteobacteria as a critical target for managing ARGs proliferation. These findings provide not only a fresh perspective for the understanding, but also a robust foundation for the management of urban lake freshwater ecosystems. Our findings highlight that enclosure management promotes microbial community stability and functional resilience, which are critical for restoring ecosystem services in urban lakes. This study provides actionable insights for designing targeted conservation strategies to enhance the sustainability of freshwater ecosystems under anthropogenic pressure.}, }
@article {pmid40517504, year = {2025}, author = {Tang, X and Liu, Y and Yang, W and Wu, Y and Yong, T and Liu, W and Lv, F and Hussain, K and Wang, Y and Gao, X and Zhang, Y}, title = {Macroplastics in soybean cultivation: Neutral on plant growth but disruptive to nitrogen-fixing microbiome.}, journal = {Ecotoxicology and environmental safety}, volume = {301}, number = {}, pages = {118499}, doi = {10.1016/j.ecoenv.2025.118499}, pmid = {40517504}, issn = {1090-2414}, mesh = {*Glycine max/growth &amp; development/drug effects/microbiology ; *Nitrogen Fixation/drug effects ; *Soil Microbiology ; *Microbiota/drug effects ; *Soil Pollutants/toxicity ; Soil/chemistry ; Nitrogen/metabolism ; Nitrates/analysis/metabolism ; Agriculture ; Bradyrhizobium/drug effects ; Nitrogen Cycle/drug effects ; }, abstract = {Macroplastics are an emerging yet underexplored pollutant in agricultural soils, with the potential to disrupt nitrogen (N) cycling through physical interference and microbial community shifts. While extensive studies have focused on microplastics, the effects of larger plastic debris (>2 cm) on soil-plant systems in legume cropping systems remain poorly understood. We conducted a 71-d mesocosm study utilizing [15]N isotopic tracing and metagenomic sequencing to demonstrate how macroplastics influence soybean growth and soil-soybean continuum N cycling. Soybean growth was not affected under macroplastics exposure (up to 200 kg ha[-][1]). However, macroplastics increased soil NO3[-] and NH4[+] concentrations, and elevated urease and ammonia monooxygenase activities, suggesting enhanced N availability. Paradoxically, macroplastics significantly disrupted the N-fixing microbial community, reducing the abundance of key bacteria such as Azorhizobium and Bradyrhizobium. Nitrogen fixation pathways (in log10-transformed TPM+1) were markedly suppressed in soils treated with 200 kg ha[-1] macroplastics compared to untreated soils (p < 0.001). Our findings highlight the potential risks of macroplastics posing to N cycling and microbial health in agricultural soils. This study addresses a critical knowledge gap by shifting the focus from micro- to macroplastic impacts on biogeochemical cycling.}, }
@article {pmid40489603, year = {2025}, author = {Cao, J and He, Q and Zhang, M and Zhou, R and Feng, C}, title = {Characteristics and Clinical Significance of Gut Microbiota in Patients with Invasive Pulmonary Aspergillosis.}, journal = {Polish journal of microbiology}, volume = {74}, number = {2}, pages = {131-142}, pmid = {40489603}, issn = {2544-4646}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Invasive Pulmonary Aspergillosis/microbiology/diagnosis ; Male ; Female ; Middle Aged ; Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Aged ; Adult ; Metagenomics ; Case-Control Studies ; High-Throughput Nucleotide Sequencing ; Clinical Relevance ; }, abstract = {Gut microbiota acts on the lungs through the gut-lung axis and play an important role in lung diseases. However, there are no reports on the gut microbiota characteristics in patients with invasive pulmonary aspergillosis (IPA). We aimed to analyze changes in gut microbiota in IPA patients, correlate these changes with clinical indicators and disease prognosis, and explore the application value of these characteristic changes in diagnosing IPA. The objective was to provide a theoretical basis for preventing and treating individual immunity. We conducted metagenomic next-generation sequencing of fecal samples from 43 patients with IPA and 31 healthy controls to analyze changes in the gut microbiota of these patients. We also built a random forest model for diagnosing IPA based on the gut microbiota. Compared to healthy controls, IPA patients showed a decrease in gut microbiota diversity and metabolic levels. Changes in the microbiota were characterized by a significant reduction in anti-inflammatory species that produce short-chain fatty acids, such as Faecalibacterium, Blautia, Roseburia, Phocaeicola, and Bacteroides. In contrast, opportunistic pathogens, such as Enterococcus, Corynebacterium, Escherichia, Staphylococcus, Haemophilus, and Finegoldia, were significantly enriched. The classification model based on Clostridium fessum, Blautia wexlerae, Streptococcus pseudopneumoniae, Corynebacterium striatum, and Faecalibacterium prausnitzii showed high value in distinguishing patients with IPA from healthy controls. Patients with IPA exhibit gut microbiota imbalance. The gut microbiota can serve as a biomarker that helps in diagnosing IPA. Our findings support the potential use of gut microbiota as a target for IPA prevention and treatment.}, }
@article {pmid40472755, year = {2025}, author = {Chen, M and Xing, L and Gao, S and Guo, Y and Qiu, T and Wang, X and Gao, M}, title = {Metagenomic analysis deciphers airborne pathogens with enhanced antimicrobial resistance and virulence factors in composting facilities.}, journal = {Environment international}, volume = {201}, number = {}, pages = {109569}, doi = {10.1016/j.envint.2025.109569}, pmid = {40472755}, issn = {1873-6750}, mesh = {*Composting ; *Virulence Factors/genetics ; *Air Microbiology ; Metagenomics ; *Bacteria/genetics ; *Drug Resistance, Bacterial/genetics ; Microbiota ; *Drug Resistance, Microbial/genetics ; Humans ; }, abstract = {The composting process has been shown to effectively reduce antimicrobial resistance (AMR) in animal manure, but its influence on surrounding airborne AMR remains unknown, particularly with regard to human-pathogenic antibiotic-resistant bacteria (HPARB). In this study, air and paired compost samples were collected from a full-scale composting facility, and the antibiotic resistome, microbiome, and HPARB were systematically analyzed in both two habitats using metagenomic analysis. Current result uncovered the profiles of HPARB in air, showing that significantly more airborne HPARB were assembled than that in compost samples. Airborne pathogens harboredan increased abundance and diversity of antibiotic resistance genes (ARGs) and virulence factor genes (VFGs) in comparison with compost-borne HPARB. The core antibiotic resistome represents 18.58% of overall ARG subtypes, contributing to 86.31% of ARG abundance. A higher number of enriched core ARGs (2.16- to 13.36-times higher), including mexF, tetW, and vanS, were observed in air samples compared to compost samples. As an important human pathogen, Mycobacterium tuberculosis was prevalent in the air and carried more ARG (6) and VFG (130) subtypes than those in compost. A significantly higher risk score was detected for airborne AMR in the composting facility compared to that in hospital and urban environments. This study revealed the enhanced airborne HPARB through comparative experiments between air and composting habitats. It highlighted the unrecognized AMR risks associated with air in composting site and provided a scientific basis for accurately assessing health outcomes caused by occupational exposure.}, }
@article {pmid40448586, year = {2025}, author = {Jones, LM and El Aidy, S}, title = {Electroactive ecosystem insights from corrosion microbiomes inform gut microbiome modulation.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, doi = {10.1093/ismejo/wraf112}, pmid = {40448586}, issn = {1751-7370}, support = {ENPPS.IPP.019.004/NWO_/Dutch Research Council/Netherlands ; }, mesh = {*Gastrointestinal Microbiome/physiology ; Humans ; Biofilms/growth &amp; development ; Corrosion ; Oxidation-Reduction ; *Ecosystem ; Bacteria/metabolism ; Electron Transport ; Host Microbial Interactions ; }, abstract = {Electroactive microorganisms influence environmental and host-associated ecosystems through their ability to mediate extracellular electron transfer. This review explores parallels between electroactive microorganisms (EAM)-driven microbiologically influenced corrosion systems and the human gut microbiome. In corrosion, EAMs contribute to biofilm formation, redox cycling, and material degradation through mechanisms such as direct electron transfer and syntrophic interactions. Similarly, gut-associated EAMs regulate redox balance, drive short-chain fatty acid production, and shape host-microbe interactions. Despite differing contexts, both systems share traits like anoxic niches, biofilm formation, and metabolic adaptability. Insights from well-characterized corrosion microbiomes offer valuable frameworks to understand microbial resilience, electron transfer strategies, and interspecies cooperation in the gut. Bridging knowledge between these systems can inform microbiome engineering approaches aimed at promoting gut health, highlighting the need for further functional metagenomics and exploration of archaeal contributions to biofilm stability and redox modulation.}, }
@article {pmid40318224, year = {2025}, author = {Maritan, AJ and Clements, CS and Pratte, ZA and Hay, ME and Stewart, FJ}, title = {Sea cucumber grazing linked to enrichment of anaerobic microbial metabolisms in coral reef sediments.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, doi = {10.1093/ismejo/wraf088}, pmid = {40318224}, issn = {1751-7370}, mesh = {Animals ; *Geologic Sediments/microbiology ; RNA, Ribosomal, 16S/genetics ; Anaerobiosis ; *Sea Cucumbers/physiology ; *Coral Reefs ; *Anthozoa/microbiology ; *Microbiota ; Polynesia ; Metagenomics ; Metagenome ; Bacteria/classification/genetics/metabolism ; }, abstract = {Sea cucumbers have been overharvested world-wide, making assessments of their ecological effects challenging, but recent research demonstrated that sea cucumbers increased coral survival via disease suppression and were therefore important for facilitating reef health. The mechanisms underpinning the sea cucumber-coral interaction are not well understood but are likely mediated through sea cucumber grazing of microbes from reef sediments. We explored how sea cucumber grazing alters the sediment microbiome by leveraging a healthy sea cucumber population on a reef in French Polynesia. We used quantitative PCR, 16S rRNA gene sequencing, and shotgun metagenomics to compare the sediment microbiome in cages placed in situ with or without sea cucumbers. We hypothesized that grazing would lower microbial biomass, change sediment microbiome composition, and deplete sediment metagenomes of anaerobic metabolisms, likely due to aeration of the sediments. Sea cucumber grazing resulted in a 75% reduction in 16S rRNA gene abundances and reshaped microbiome composition, causing a significant decrease of cyanobacteria and other phototrophs relative to ungrazed sediments. Grazing also resulted in a depletion of genes associated with cyanotoxin synthesis, suggesting a potential link to coral health. In contrast to expectations, grazed sediment metagenomes were enriched with marker genes of diverse anaerobic or microaerophilic metabolisms, including those encoding high oxygen affinity cytochrome oxidases. This enrichment differs from patterns linked to other bioturbating invertebrates. We hypothesize that grazing enriches anaerobic processes in sediment microbiomes through removal of oxygen-producing autotrophs, fecal deposition of sea cucumber gut-associated anaerobes, or modification of sediment diffusibility. These results suggest that sea cucumber harvesting influences biogeochemical processes in reef sediments, potentially mediating coral survival by altering the sediment microbiome and its production of coral-influencing metabolites.}, }
@article {pmid40162572, year = {2025}, author = {Wu, H and Zhang, H and Dong, T and Li, Z and Guo, X and Chen, H and Yao, Y}, title = {Overcoming Extreme Ammonia Inhibition on Methanogenesis by Artificially Constructing a Synergistically Community with Acidogenic Bacteria and Hydrogenotrophic Archaea.}, journal = {Advanced science (Weinheim, Baden-Wurttemberg, Germany)}, volume = {12}, number = {23}, pages = {e2502743}, doi = {10.1002/advs.202502743}, pmid = {40162572}, issn = {2198-3844}, support = {2024YFD1700500//National Key R&amp;D Program&#xa0;of China/ ; A279021901//Shaanxi Youth Thousand Talents/ ; 2024CY2-GJHX-74//Shaanxi Key R&amp;D Program&#xa0;of China/ ; 2452021112//Chinese Universities Scientific Fund/ ; JCYJ20220530161408019//Shenzhen Natural Science Foundation/ ; 2023KCXTD038//Guangdong Provincial University Innovation Team Project/ ; 2022-K32//Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering/ ; Z111021902//Northwest A&amp;F University Young Talent Project/ ; }, mesh = {*Ammonia/metabolism ; *Methane/metabolism ; *Archaea/metabolism ; *Bacteria/metabolism ; Hydrogen/metabolism ; Anaerobiosis ; Microbiota ; }, abstract = {High total ammonia nitrogen (TAN) inhibits anaerobic digestion (AD) and cannot be completely eliminated by merely enhancing a stage of AD. This study incorporates TAN-tolerant inoculum into substrates hydrolyzed by Rhizopus mixed agents to simultaneously enhance hydrolysis-acidogenesis-methanogenesis. The results show a 16.46-fold increase in CH4 production under TAN-inhibited (6870.97 mg L-1) conditions, even exceeding the AD without TAN by 21.10%. Model substrates sodium acetate and mixed H2 confirm hydrogenotrophic methanogenesis is the main pathway, with reduced TAN inhibition. Furthermore, a synergistic metabolic microbial community dominated by hydrolytic bacteria JAAYGG01 sp. and DTU014 sp., acidogenic bacteria DTU015 sp., DTU013 sp., and JAAYLO01 sp., and methanogens Methanosarcina mazei and an unclassified species in the Methanoculleus is reconstructed to resist TAN inhibition. Metagenomic combined with metatranscriptomic sequencing identifies that this microbial community carries xynD and bglB to regulate substrate hydrolysis, leading to acetate production through glycolysis, butyrate, and pyruvate metabolism with high acetate kinase activity, thereby CH4 produced primarily via hydrogenotrophic methanogenesis with high coenzyme F420 activity, facilitated by efficient mass transfer processes and quorum sensing regulation. This cleaner strategy obtains higher economic benefit (US$149.02) than conventional AD and can increase 154.64-fold energy production of a 24 000 m3 biogas plant, guided by machine learning.}, }
@article {pmid39270978, year = {2025}, author = {Fang, Z and Zang, Q and Chen, J and Li, Z and Yang, D and Wu, C and Yang, H and Guo, N}, title = {Whole-body mass spectrometry imaging reveals the systemic metabolic disorder and catecholamines biosynthesis alteration on heart-gut axis in heart failure rat.}, journal = {Journal of advanced research}, volume = {73}, number = {}, pages = {411-426}, doi = {10.1016/j.jare.2024.09.001}, pmid = {39270978}, issn = {2090-1224}, mesh = {Animals ; *Heart Failure/metabolism/diagnostic imaging ; *Catecholamines/biosynthesis/metabolism ; Rats ; Gastrointestinal Microbiome ; Male ; Rats, Sprague-Dawley ; *Myocardium/metabolism ; *Metabolic Diseases/metabolism/diagnostic imaging ; Disease Models, Animal ; Mass Spectrometry/methods ; Dysbiosis/metabolism ; Heart ; Tandem Mass Spectrometry ; Tyrosine 3-Monooxygenase/metabolism ; Norepinephrine ; }, abstract = {INTRODUCTION: Heart failure (HF) is a systemic metabolic disorder disease, across multiorgan investigations advancing knowledge of progression and treatment of HF. Whole-body MSI provides spatiotemporal information of metabolites in multiorgan and is expected to be a potent tool to dig out the complex mechanism of HF.<br><br>OBJECTIVES: This study aimed at exploring the systemic metabolic disorder in multiorgan and catecholamines biosynthesis alteration on heart-gut axis after HF.<br><br>METHODS: Whole-body MSI was used to characterize metabolic disorder of the whole rat body after HF. An integrated method by MSI, LC-MS/MS and ELISA was utilized to analyze key metabolites and enzymes on heart, small intestine, cecum and colon tissues of rat. Gut microbiota dysbiosis was investigated by 16S rDNA sequencing and metagenomic sequencing. Validation experiments and in vitro experiments were performed to verify the effect of catecholamines biosynthesis alteration on heart-gut axis after HF.<br><br>RESULTS: Whole-body MSI exhibited varieties of metabolites alteration in multiple organs. Remarkably, catecholamine biosynthesis was significantly altered in the serum, heart and intestines of rats. Furthermore, catecholamines and tyrosine hydroxylase were obviously upregulated in heart and colon tissue. Turicibacter_sanguinis was relevant to catecholamines of heart and colon. Validation experiments demonstrated excessive norepinephrine induced cardio-intestinal injury, including significantly elevating the levels of BNP, pro-BNP, LPS, DAO, and increased the abundance of Turicibacter_sanguinis. These alterations could be reversed by metoprolol treatment blocking the effect of norepinephrine. Additionally, in vitro studies demonstrated that norepinephrine promoted the growth of Turicibacter_sanguinis and Turicibacter_sanguinis could import and metabolize norepinephrine. Collectively, excessive norepinephrine exerted bidirectional effects on cardio-intestinal function to participate in the progression of HF.<br><br>CONCLUSION: Our study provides a new approach to elucidate multiorgan metabolic disorder and proposes new insights into heart-gut axis in HF development.}, }
@article {pmid39147198, year = {2025}, author = {Zeng, Y and Guo, M and Wu, Q and Tan, X and Jiang, C and Teng, F and Chen, J and Zhang, F and Ma, X and Li, X and Gu, J and Huang, W and Zhang, C and Yuen-Kwan Law, B and Long, Y and Xu, Y}, title = {Gut microbiota-derived indole-3-propionic acid alleviates diabetic kidney disease through its mitochondrial protective effect via reducing ubiquitination mediated-degradation of SIRT1.}, journal = {Journal of advanced research}, volume = {73}, number = {}, pages = {607-630}, doi = {10.1016/j.jare.2024.08.018}, pmid = {39147198}, issn = {2090-1224}, mesh = {Animals ; *Diabetic Nephropathies/metabolism/drug therapy/pathology ; *Gastrointestinal Microbiome/physiology ; Mice ; *Sirtuin 1/metabolism ; *Mitochondria/metabolism/drug effects ; Humans ; *Indoles/pharmacology/metabolism ; Ubiquitination/drug effects ; Male ; Mice, Inbred C57BL ; Female ; Endothelial Cells/metabolism/drug effects ; *Propionates/metabolism/pharmacology ; }, abstract = {INTRODUCTION: Gut microbes and their metabolites play crucial roles in the pathogenesis of diabetic kidney disease (DKD). However, which one and how specific gut-derived metabolites affect the progression of DKD remain largely unknown.<br><br>OBJECTIVES: This study aimed to investigate the potential roles of indole-3-propionic acid (IPA), a microbial metabolite of tryptophan, in DKD.<br><br>METHODS: Metagenomic sequencing was performed to analyze the microbiome structure in DKD. Metabolomics screening and validation were conducted to identify characteristic metabolites associated with DKD. The protective effect of IPA on DKD glomerular endothelial cells (GECs) was assessed through in vivo and in vitro experiments. Further validation via western blot, immunoprecipitation, gene knockout, and site-directed mutation elucidated the mechanism of IPA on mitochondrial injury.<br><br>RESULTS: Alterations in gut microbial community structure and dysregulated tryptophan metabolism were evident in DKD mice. Serum IPA levels were significantly reduced in DKD patients and correlated with fasting blood glucose, HbA1c, urine albumin-to-creatinine ratio (UACR), and estimated glomerular filtration rate (eGFR). IPA supplementation ameliorated albuminuria, bolstered the integrity of the glomerular filtration barrier, and mitigated mitochondrial impairments in GECs. Mechanistically, IPA hindered SIRT1 phosphorylation-mediated ubiquitin-proteasome degradation, restoring SIRT1's role in promoting PGC-1&#x3b1; deacetylation and nuclear translocation, thereby upregulating genes associated with mitochondrial biosynthesis and antioxidant defense.<br><br>CONCLUSION: Our findings underscore the potential of the microbial metabolite IPA to attenuate DKD progression, offering novel insights and potential therapeutic strategies for its management.}, }
@article {pmid28732571, year = {2017}, author = {Stefanaki, C and Peppa, M and Mastorakos, G and Chrousos, GP}, title = {Examining the gut bacteriome, virome, and mycobiome in glucose metabolism disorders: Are we on the right track?.}, journal = {Metabolism: clinical and experimental}, volume = {73}, number = {}, pages = {52-66}, doi = {10.1016/j.metabol.2017.04.014}, pmid = {28732571}, issn = {1532-8600}, mesh = {Animals ; Gastrointestinal Microbiome/*physiology ; *Glucose Metabolism Disorders ; Humans ; Hyperglycemia ; Microbiota/*physiology ; Mycobiome/*physiology ; }, abstract = {Human gut microbiome is defined as the gene complement of the gut microbial community, measured via laboratory metagenomic techniques. It includes bacteriome, virome and mycobiome, which represent, respectively, the assemblages of bacteria, viruses and fungi, living in the human gut. Gut microbiota function as a living "organ" that interacts with the gastro-intestinal environment, provides nutrients and vitamins to the organism and transduces hormonal messages, essentially influencing the main metabolic pathways, including drug metabolism. A clear association between gut, and glucose metabolism disorders has recently emerged. Medications acting on glucose absorption in the gut, or enhancing gut hormone activity are already extensively employed in the therapy of diabetes. Moreover, the gut is characterized by immune, and autonomous neuronal features, which play a critical role in maintaining glucose metabolism homeostasis. Gut microbes respond to neuroendocrine, and immune biochemical messages, affecting the health, and behavior of the host. There is vast heterogeneity in the studies included in this review, hence a meta-analysis, or a systematic review were not applicable. In this article, we attempt to reveal the interplay between human gut microbiota physiology, and hyperglycemic states, synthesizing, and interpreting findings from human studies.}, }
@article {pmid40537881, year = {2025}, author = {Linghu, Y and Hu, RS and Tang, XM and Li, RT and Li, WY and Wu, JH}, title = {Unveiling viral diversity and dynamics in mosquitoes through metagenomic analysis in Guizhou Province, China.}, journal = {Infectious diseases of poverty}, volume = {14}, number = {1}, pages = {51}, pmid = {40537881}, issn = {2049-9957}, support = {Qian Ke He Platform Talent-GCC [2022] 033-1//The Training Project for High-Level Innovative talents in Guizhou Province, China/ ; Qian Ke He Platform Talent-CXTD [2022] 004//The Science and Technology Innovation Talent team of Guizhou Province, China/ ; Project Contract Number: Xiao Bo He J Zi [2023] 44//The Scientific Research Foundation for Advanced Talents, Guizhou Medical University/ ; NO. 2024GCC16Z//The High-level Talent Research Start-up Project of Sichuan University of Arts and Science/ ; }, abstract = {BACKGROUND: Poverty, disease, and vector ecology intersect to present ongoing health threats, particularly in ecologically sensitive regions. Guizhou Province in China, with its complex karst topography and rich biodiversity, offers a unique environment to study mosquito-borne viral transmission. Despite over 5000 reported cases of Japanese encephalitis in the past two decades and the detection of Zika virus in 2016, the virological landscape of this region remains poorly understood. This study aims to characterize the mosquito-associated virome, assess viral diversity, and identify factors influencing transmission dynamics in Guizhou Province.<br><br>METHODS: Between 2021 and 2022, we conducted a 2-year mosquito surveillance across eight ecologically distinct regions in Guizhou Province. Adult mosquitoes were collected using a variety of methods, including BG Mosquitaire CO2 traps, mosquito-killing lamps, manual collection, human bait traps, and oviposition traps. To investigate the virome diversity and dynamics within mosquito populations, we performed metagenomic sequencing and bioinformatics analysis on pooled mosquito samples collected from geographically diverse sampling sites.<br><br>RESULTS: We collected more than 40,000 adult mosquitoes, primarily belonging to four genera: Aedes, Anopheles, Armigeres, and Culex. Dominant species included Aedes albopictus, Anopheles sinensis, Armigeres subalbatus, and Culex tritaeniorhynchus. Notably, we report the first provincial record of the Anopheles baileyi complex, expanding the known distribution of mosquito vector in this region. Viral metagenomic sequencing, coupled with bioinformatic analysis, identified 162 viral contigs, including 140 known and 22 previously uncharacterized viruses. We experimentally confirmed the genotypes of three medically important zoonotic viruses: Japanese encephalitis virus (JEV-GI), Getah virus (GETV-GIII) and Banna virus (BAV-A2). Comparative analysis of viral abundance across mosquito species revealed that Aedes albopictus populations in Guizhou harbor a distinct virome composition, diverging from those reported in other geographic regions.<br><br>CONCLUSIONS: This study presents the comprehensive characterization of the mosquito-associated virome in Guizhou Province, providing critical insights into viral diversity, vector competence, and transmission dynamics within karst ecosystems. The detection of multiple zoonotic viruses highlights the need for strengthened surveillance and targeted public health interventions in this region.}, }
@article {pmid40535544, year = {2025}, author = {Wang, X and Cao, D and Chen, W and Sun, J and Hu, H}, title = {Metagenomics reveals unique gut mycobiome biomarkers in major depressive disorder - a non-invasive method.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1582522}, pmid = {40535544}, issn = {2235-2988}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Depressive Disorder, Major/microbiology/diagnosis ; *Mycobiome ; Biomarkers/analysis ; Male ; Female ; Adult ; *Metagenomics/methods ; *Fungi/classification/genetics/isolation &amp; purification ; Middle Aged ; Machine Learning ; Support Vector Machine ; Case-Control Studies ; Feces/microbiology ; }, abstract = {BACKGROUND: An increasing amount of evidence suggests a potential link between alterations in the intestinal microbiota and the onset of various psychiatric disorders, including depression. Nevertheless, the precise nature of the link between depression and the intestinal microbiota remains largely unknown. A significant proportion of previous research has concentrated on the study of gut bacterial communities, with relatively little attention paid to the link between gut mycobiome and depression.<br><br>METHODS: In this research, we analyzed the composition and differences of intestinal fungal communities between major depressive disorder (MDD) and healthy controls. Subsequently, we constructed a machine learning model using support vector machine-recursive feature elimination to search for potential fungal markers for MDD.<br><br>RESULTS: Our findings indicated that the composition and beta diversity of intestinal fungal communities were significantly changed in MDD compared to the healthy controls. A total of 22 specific fungal community markers were screened out by machine learning, and the predictive model had promising performance in the prediction of MDD (area under the curve, AUC = 1.000). Additionally, the intestinal fungal communities demonstrated satisfactory performance in the validation cohort, with an AUC of 0.884 (95% CI: 0.7871-0.9476) in the Russian validation cohort, which consisted of 36 patients with MDD and 36 healthy individuals. The AUC for the Wuhan validation cohort was 0.838 (95% CI: 0.7403-0.9102), which included 40 patients with MDD and 42 healthy individuals.<br><br>CONCLUSION: To summarize, our research revealed the characterization of intestinal fungal communities in MDD and developed a prediction model based on specific intestinal fungal communities. Although MDD has well-established diagnostic criteria, the strategy based on the model of gut fungal communities may offer predictive biomarkers for MDD.}, }
@article {pmid40535541, year = {2025}, author = {Kato-Kogoe, N and Tsuda, K and Kudo, A and Sakaguchi, S and Omori, M and Komori, E and Ohmichi, M and Hamada, W and Nakamura, S and Nakano, T and Tamaki, J and Ueno, T}, title = {Salivary microbiota and IgA responses are different in pre-diabetic individuals compared to normoglycemic controls.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1591285}, pmid = {40535541}, issn = {2235-2988}, mesh = {Humans ; *Saliva/microbiology/immunology ; Female ; Male ; *Immunoglobulin A/analysis/immunology ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; *Microbiota/immunology ; *Prediabetic State/immunology/microbiology ; Adult ; Bacteria/classification/genetics/isolation &amp; purification ; Diabetes Mellitus, Type 2/immunology/microbiology ; Aged ; Metagenomics ; DNA, Bacterial/genetics/chemistry ; }, abstract = {INTRODUCTION: In recent years, changes in the oral microbiota of patients with type 2 diabetes mellitus (T2DM) have been increasingly recognized. The salivary microbiota may also be altered in pre-diabetes, which is the earliest stage of abnormal blood glucose regulation and a reversible stage preceding T2DM; however, its characteristics are poorly understood. Salivary immunoglobulin A (IgA) is a host defense factor central to the oral immune system and may play an important role in regulating the salivary microbiota. Given that alterations in immunoreactivity are observed in pre-diabetes, we hypothesized that the salivary IgA response may also be altered; however, limited knowledge exists regarding this. Therefore, in the present study, we aimed to evaluate the characteristics of salivary microbiota and IgA responses against salivary microbiota in individuals with pre-diabetes, comparing them to those in individuals with normoglycemia.<br><br>METHODS: Saliva samples were collected from 101 pre-diabetic individuals (PreDM group) and 101 age- and sex-matched normoglycemic controls (Normal group). Further, 16S rRNA metagenomic analysis was performed to compare bacterial microbiota composition. For each of the 19 saliva samples from the PreDM and Normal groups, IgA-enriched and IgA-nonenriched fractions were separated via magnetic-activated cell sorting, followed by 16S rRNA metagenomic analysis. The IgA index was calculated to evaluate the difference in the IgA response to each bacterium between the PreDM and Normal groups.<br><br>RESULTS: Bacterial species richness was significantly lower in the PreDM group than in the Normal group (observed operational taxonomic unit index, p = 0.042), and a difference between these groups was noted in the overall salivary microbiota structure (unweighted UniFrac distances, p = 0.009). Salivary IgA responses against several bacterial genera differed between the PreDM and Normal groups. Significantly higher IgA responses were noted against Haemophilus in the PreDM group, with lower responses against Capnocytophaga, Corynebacterium, and Streptococcus relative to those in the Normal group.<br><br>CONCLUSIONS: Salivary microbiota and IgA responses differ between pre-diabetic individuals and normoglycemic controls. The current findings advance our understanding of the interaction between oral bacteria and host immune responses in patients with a poor glycemic status.}, }
@article {pmid40533170, year = {2025}, author = {Kumari Nawarathna, TNT and Fujii, N and Yamamoto, K and Kuroda, K and Narihiro, T and Ozaki, N and Ohashi, A and Kindaichi, T}, title = {Metagenomic Insights into Candidatus Scalindua in a Long-term Cultivated Marine Anammox Consortium: The Important Role of Tetrahydrofolate-mediated Carbon Fixation.}, journal = {Microbes and environments}, volume = {40}, number = {2}, pages = {}, doi = {10.1264/jsme2.ME25007}, pmid = {40533170}, issn = {1347-4405}, mesh = {*Bacteria/metabolism/genetics/classification/isolation &amp; purification ; *Carbon Cycle ; Metagenomics ; *Microbial Consortia/genetics ; *Ammonia/metabolism ; Folic Acid/metabolism/biosynthesis ; *Seawater/microbiology ; Metagenome ; Bioreactors/microbiology ; Metabolic Networks and Pathways ; Phylogeny ; Genome, Bacterial ; Wastewater/microbiology ; Carbon/metabolism ; }, abstract = {Marine anammox bacteria have been an exciting research area in recent years due to their high effectiveness in treating ammonia-containing saline wastewater. However, their direct implementation in the wastewater industry faces challenges due to slow growth, difficulty obtaining pure cultures, and their tendency to exist as part of an anammox consortium, interacting symbiotically with other bacteria. In the present study, 91 draft genome metagenome-assembled genomes (MAGs) from a long-term-operated reactor were recovered to clarify detailed symbiotic interactions within an anammox consortium. One marine anammox bacterial MAG, identified as Candidatus Scalindua, was successfully recovered and was abundant within the sampled microbial community. A comprehensive metabolic pathway ana-lysis revealed that Ca. Scalindua exhibited the complete anammox pathway and the Wood-Ljungdahl pathway for carbon fixation. The folate biosynthesis pathway in Ca. Scalindua was incomplete, lacking dihydrofolate reductase, a key enzyme for tetrahydrofolate (THF) production. The folate biopterin transporter, essential for transporting folate-related metabolites among coexisting bacteria, was identified exclusively in Ca. Scalindua. In addition, the impact of exogenously supplied THF on microbial activity and carbon uptake rates was investigated in batch experiments using [14]C-labeled bicarbonate. The results obtained revealed that 2‍ ‍mg L[-1] of exogenous THF resulted in a 43% increase in the carbon uptake rate, while anammox activity remained unaffected. The present results suggest that THF is a key intermediate for carbon fixation in Ca. Scalindua and may be essential for their growth.}, }
@article {pmid40532696, year = {2025}, author = {Er, YX and Lee, SC and Aneke, C and Conlan, S and Muslim, A and Deming, C and Che, Y and Yap, NJ and Tee, MZ and Abdull-Majid, N and Shahrizal, S and Leong, KF and Han, J and Shen, Z and Than, LTL and Park, M and Mohd Sayed, I and ,  and Seyedmousavi, A and Kong, HH and Loke, P and Segre, JA and Lim, YAL}, title = {Trichophyton concentricum fungal infections and skin microbiomes of Indigenous Peninsular Malaysians.}, journal = {Cell}, volume = {}, number = {}, pages = {}, doi = {10.1016/j.cell.2025.05.034}, pmid = {40532696}, issn = {1097-4172}, abstract = {Recent outbreaks of multidrug-resistant fungi infecting human skin emphasize the importance of understanding fungal pathophysiology and spread. In efforts to address health concerns with various Indigenous Peninsular Malaysians (Orang Asli [OA]), tinea imbricata-a Trichophyton concentricum fungal skin infection-emerged as a particular concern. We investigated the etiology and transmission of tinea imbricata by culturing, testing antifungal sensitivities, and sequencing T. concentricum isolates in remote OA villages. Among regionally conserved isolates, we identified the emergence of terbinafine-resistant T. concentricum microbiologically and genomically. Investigating the skin microbiomes of 82 Indigenous OA, we found unique microbiota and lower relative abundances of bacterial commensals (Cutibacterium acnes, Staphylococcus epidermidis) among OA versus Malaysian and US urban populations, emphasizing how understudied populations provide unprecedented knowledge on host-microbiome co-evolution. These findings provide valuable insights into clinical, microbiological, and genomic features of chronic fungal skin infections, offering the potential to inform strategies to address drug resistance and effective therapy.}, }
@article {pmid40530822, year = {2025}, author = {Wu, H and Sun, B and Li, J}, title = {Metagenomics research on PAH biodegradation in the lower reaches of the Shiwuli River in Chaohu, China.}, journal = {Environmental science. Processes &amp; impacts}, volume = {}, number = {}, pages = {}, doi = {10.1039/d5em00025d}, pmid = {40530822}, issn = {2050-7895}, abstract = {Metagenomics is a powerful tool for investigating functional microorganisms, molecular mechanisms and genes involved in the degradation of polycyclic aromatic hydrocarbons (PAHs) in situ complex environments. In this study, we selected three land use types in the lower reaches of the Shiwuli River in Chaohu and applied metagenomics technology. The results revealed that Rhodoplanes and Bradyrhizobium were the abundant PAH-degrading microorganisms across the three land use types. Based on the functional annotation and PAH degradation pathway, it was found that the in situ microbial communities of the three land use types shared common metabolic pathways for phenanthrene degradation. In addition, a unique metabolic pathway for PAH degradation was identified in the agricultural land. Only Patulibacter contributed to flnE (KO14604) in the agricultural land, which was involved in the metabolic pathway of fluorene degradation. Results of this study suggested that the in situ degradation of PAHs was not completed by a single genus, and it involved the synergy effects of different PAH-degrading microorganisms. There was no significant difference between the compositions and relative abundances of PAH-degrading microorganisms in the three land use types and those presented in the Kyoto Encyclopedia of Genes and Genomes Orthology (KO). However, the same microorganism contributed to different functional genes in different samples. Genes encoding protocatechuic acid 4,5-dioxygenase were widely distributed and relatively abundant. Therefore, this gene may serve as an indicator of PAH degradation potential. Among all the factors, the total organic carbon and nitrate nitrogen contents exhibited significant influences on the functional genes (KO) related to PAH degradation (p < 0.05).}, }
@article {pmid40528698, year = {2025}, author = {Bonilla-Espadas, M and Lifante-Martínez, I and Camacho, M and Orgilés-Calpena, E and Arán-Aís, F and Bertazzo, M and Bonete, MJ}, title = {Chromium-Tanned Leather and Microbial Consortia: Identification of Taxa With Biodegradation Potential and Chromium Tolerance.}, journal = {Environmental microbiology reports}, volume = {17}, number = {3}, pages = {e70134}, pmid = {40528698}, issn = {1758-2229}, support = {IMDEEA/2021/11//European Union through the European Regional Development Fund within the Operational Programme of the Valencian Community 2014-2020/ ; UAIND21-02B//Universidad de Alicante/ ; }, mesh = {*Chromium/metabolism/toxicity ; *Microbial Consortia ; Biodegradation, Environmental ; Biofilms/growth &amp; development ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Microscopy, Electron, Scanning ; Tanning ; }, abstract = {Chromium-tanned leather waste poses significant environmental challenges due to its resistance to degradation and heavy metal content. This study investigates the potential of naturally selected microbial consortia to initiate the degradation of chromium-tanned leather and identifies key bacterial genera capable of tolerating chromium and producing enzymes relevant to collagen breakdown. A novel multidisciplinary approach combining gravimetric assays, metagenomic sequencing, and scanning electron microscopy (SEM) was applied to characterise both microbial composition and degradation dynamics. Dominant genera such as Bacillus, Microbacterium, and Acinetobacter were associated with collagen degradation and metal tolerance, with Bacillus-rich communities showing the most pronounced mass loss (up to 3%). SEM analysis revealed the formation of robust biofilms and extensive matrix disruption, indicating enzymatic activity and structural breakdown of the leather. The formation of exopolysaccharide-rich biofilms was found to be critical for microbial adhesion and biodegradation efficacy. These findings provide initial insights into microbial mechanisms involved in the degradation of chromium-tanned leather and suggest potential applications for microbial consortia in future sustainable leather waste management strategies.}, }
@article {pmid40528221, year = {2025}, author = {Gao, L and Liao, H and Chen, Y and Ye, C and Huang, L and Xu, M and Du, J and Zhang, J and Huang, D and Cai, S and Dong, H}, title = {Airway microbiota associated D-phenylalanine promotes non-small cell lung cancer metastasis through epithelial mesenchymal transition.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {673}, pmid = {40528221}, issn = {1479-5876}, support = {82170032//National Natural Science Foundation of China/ ; 82470058//National Natural Science Foundation of China/ ; 82270024//National Natural Science Foundation of China/ ; YZ2022ZX04//President Foundation of The Fifth Affiliated Hospital, Southern Medical University/ ; 2023A1515110216//Basic and Applied Basic Research Foundation of Guangdong Province/ ; 2023M731546//China Postdoctoral Science Foundation/ ; }, mesh = {*Epithelial-Mesenchymal Transition/drug effects ; Humans ; *Carcinoma, Non-Small-Cell Lung/pathology/microbiology ; *Lung Neoplasms/pathology/microbiology ; Animals ; Male ; Neoplasm Metastasis ; Female ; *Microbiota ; *Phenylalanine/metabolism/pharmacology/administration &amp; dosage ; Middle Aged ; Bronchoalveolar Lavage Fluid/chemistry ; Cell Line, Tumor ; Mice ; Aged ; *Respiratory System/microbiology ; }, abstract = {BACKGROUND: Lung cancer is the leading cause of cancer-related death worldwide, and patients with distant metastasis have a poor prognosis. Various studies have reported that microbiota and metabolites significantly differ between healthy individuals and lung cancer patients. However, the effects of metabolites on tumor formation and metastasis are unclear. Therefore, our study aimed to determine the correlation between airway metabolites and microbiota, along with their respective roles in lung cancer metastasis.<br><br>METHODS: Bronchoalveolar lavage fluid (BALF) samples were collected from 30 non-small cell lung cancer (NSCLC) patients, including 11 patients without metastasis (M0) and 19 patients with metastasis (M1). Integrated pathogenic metagenomic and Liquid chromatography-mass spectrometry (LC&#x2012;MS) analyses were employed to explore differences between two groups. The omics data were analyzed and integrated via Spearman's correlation coefficient. Specific metabolites were subsequently used to intervene in lung cancer cells and animal models to assess their influence on tumor metastasis.<br><br>RESULTS: A total of 801 metabolites were identified in the BALF of all patients. Compared with those in the M0 group, 48 metabolites in the M1 group were significantly different. D-phenylalanine was notably upregulated in M1 and was positively related to Metamycoplasma salivarium. Intranasal administration of D-phenylalanine promoted tumor intrapulmonary metastasis and induced epithelial mesenchymal transition (EMT) process in NSCLC mouse models. Moreover, D-phenylalanine promotes the proliferation of non-small cell lung cancer cells and facilitates their migration and invasion via EMT.<br><br>CONCLUSION: The airway microbiota associated D-phenylalanine could promote lung cancer metastasis via EMT, which could be a new predictor for the diagnosis of tumor metastasis in NSCLC patients.}, }
@article {pmid40528214, year = {2025}, author = {Zhang, Y and Luo, J and Chen, K and Li, N and Luo, C and Di, S and Qin, J and Zhang, F and Chen, H and Dai, M}, title = {Cross-cohort analysis identifies shared gut microbial signatures and validates microbial risk scores for colorectal cancer.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {676}, pmid = {40528214}, issn = {1479-5876}, support = {2022-I2M-1-0031//Institute of Chinese Materia Medica, China Academy of Chinese Medical Science/ ; 82173606//National Natural Science Foundation of China/ ; 82273726//National Natural Science Foundation of China/ ; 20230484397//Beijing Nova Program of Science and Technology/ ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology ; *Gastrointestinal Microbiome/genetics ; Cohort Studies ; Risk Factors ; Risk Assessment ; Reproducibility of Results ; Male ; Female ; Middle Aged ; Metagenomics ; Case-Control Studies ; }, abstract = {BACKGROUND: Microbiome-wide association studies showed links between colorectal cancer (CRC) and gut microbiota. However, the clinical application of gut microbiota in CRC prevention has been hindered by the diversity of study populations and technical variations. We aimed to determine CRC-related gut microbial signatures based on cross-regional, cross-population, and cross-cohort metagenomic datasets, and elucidate its application value in CRC risk assessment.<br><br>METHODS: We used the MMUPHin tool to perform a meta-analysis of our own cohort and seven publicly available metagenomics datasets to identify gut microbial species associated with CRC across different cohorts, comprising of 570 CRC cases and 557 controls. Based on differential species sets, we constructed the microbial risk score (MRS) using &#x3b1;-diversity of the sub-community (MRS&#x3b1;), weighted/unweighted summation methods and machine learning algorithms. Cohort-to-cohort training and validation were performed to demonstrate the transferability.<br><br>RESULTS: We found that MRS&#x3b1; of core species was better validated and more interpretable than those constructed with summation methods or machine learning algorithms. Six species, including Parvimonas micra, Clostridium symbiosum, Peptostreptococcus stomatis, Bacteroides fragilis, Gemella morbillorum, and Fusobacterium nucleatum, were included in MRS&#x3b1; constructed by half or more of the cohorts. The AUC of MRS&#x3b1;, calculated based on the sub-community of six species, varied between 0.619 and 0.824 across the eight cohorts.<br><br>CONCLUSION: We identified six CRC-related species across regions, populations, and cohorts. The constructed MRS&#x3b1; could contribute to the risk prediction of CRC in different populations.}, }
@article {pmid40523923, year = {2025}, author = {Zhang, M and Liang, C and Li, B and Jiang, F and Song, P and Gu, H and Gao, H and Cai, Z and Zhang, T}, title = {Gut microbiome and diet contribute to ecological niche differentiation between argali (Ovis ammon hodgsoni) and blue sheep (Pseudois nayaur) on the Qinghai-Tibet Plateau.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {930}, pmid = {40523923}, issn = {2399-3642}, mesh = {Animals ; *Gastrointestinal Microbiome ; Tibet ; *Diet/veterinary ; Sheep/microbiology ; Ecosystem ; Herbivory ; }, abstract = {The gut microbiota plays a critical role in plant digestion, nutrient absorption, and ecological adaptation in herbivores. However, how gut microbiota and diet jointly influence ecological niche differentiation in sympatric species remains unclear. Here, we use metagenomic sequencing and plant trnL (UAA) fragment sequencing to examine the gut microbiota and dietary composition of sympatric Tibetan argali (Ovis ammon hodgsoni) and blue sheep (Pseudois nayaur) in the Kunlun Mountains of the Qinghai-Tibet Plateau. Despite inhabiting similar environments, the two species harbor distinct microbial compositions and functional profiles. Interestingly, higher dietary diversity does not correspond to higher microbial diversity. Tibetan argali, despite having a simpler diet, possesses a more diverse and flexible gut microbiome. In contrast, blue sheep show broader dietary preferences and stronger microbial metabolic adaptation to glycan biosynthesis and metabolism. These findings reveal significant associations between gut microbiota composition, function, and diet, supporting a microbial contribution to trophic niche differentiation. Our results highlight distinct microbial-dietary strategies in sympatric herbivores and underscore the role of the gut microbiome in ecological adaptation and species coexistence.}, }
@article {pmid40520638, year = {2025}, author = {Zakaria, D and Sandri, C and Modesto, M and Spiezio, C and Scarafile, D and Cedras, A and Borruso, L and Manghi, P and Trevisi, P and Segata, N and Mattarelli, P and Arita, M}, title = {Disentangling the gut microbiota of Aldabra giant tortoises of different ages and environments.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19566}, pmid = {40520638}, issn = {2167-8359}, mesh = {Animals ; *Turtles/microbiology ; *Gastrointestinal Microbiome/genetics ; Italy ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Age Factors ; Seychelles ; Environment ; Bacteria/genetics/classification ; }, abstract = {BACKGROUND: The gut microbiota plays a pivotal role in regulating the physiological functions of its host, including immunity, metabolism, and digestion. The impact of environment and age on microbiota can be assessed by observing long-lived animals across different age groups and environments. The Aldabra giant tortoise (Aldabrachelys gigantea) is an ideal species for this study due to its exceptionally long lifespan of over 100 years.<br><br>METHODS: Using 16S rRNA gene amplicon analysis, we analyzed 52 fecal samples from giant tortoises in Seychelles (Curieuse and Mah&#xe9; islands) and in a zoological park in Italy, from very young individuals to those of >100 years old. We performed Alpha and Beta diversity analysis, relative abundance analysis, and complex upset plot analysis, comparing the results of tortoises from different environments and age groups.<br><br>RESULTS: The diversity and overall composition of the gut microbiota of tortoises were impacted mainly by geolocation rather than their age. The greater diversity of microbiota in wild tortoises was attributed to their food variance such as wild leaves and branches, compared to captive or domesticated conditions. Beta diversity analysis also revealed the contribution of both environment and age to the variation between samples, with environments accounting for a larger proportion of this contribution. Certain bacterial families, such as Spirochaetota and Fibrobacterota, were more prevalent in environments with higher fiber intake, reflecting dietary differences. Additionally, a range of host-independent environmental bacteria was found to be specific to individuals in Curieuse and not in other geolocations. On the other hand, there were no bacterial taxa specific to centenarians, whose microbial complexity was reduced compared to adult or elderly tortoises.<br><br>CONCLUSIONS: Our records showed that environment is the primary influence in the overall composition and diversity of the gut microbiota of Aldabra giant tortoises. As giant tortoises are amongst the longest-lived vertebrate animals, these findings can be utilized to monitor their health according to their ages, and enhance their conservation efforts.}, }
@article {pmid40520307, year = {2025}, author = {Ye, S and Peng, S and Wang, X and Fan, J and Zhu, C and Huang, L and Huang, Y and Cheng, K and Ni, T and Qian, Y and Wu, X and Xu, Y}, title = {Microbial community structure and resistome dynamics on elevator buttons in response to surface disinfection practices.}, journal = {Frontiers in public health}, volume = {13}, number = {}, pages = {1593114}, pmid = {40520307}, issn = {2296-2565}, mesh = {*Disinfection/methods ; *Disinfectants/pharmacology ; Humans ; COVID-19/prevention &amp; control ; China ; *Drug Resistance, Bacterial/genetics ; *Bacteria/genetics/drug effects ; *Microbiota/drug effects ; SARS-CoV-2 ; }, abstract = {BACKGROUND: Disinfectants have been extensively used in public environments since the COVID-19 outbreak to help control the spread of the virus. This study aims to investigate whether disinfectant use influences the structure of bacterial communities and contributes to bacterial resistance to disinfectants and antibiotics.<br><br>METHODS: Using molecular biology techniques-including metagenomic sequencing and quantitative PCR (qPCR)-we analyzed the bacterial communities on elevator button surfaces from two tertiary hospitals, one infectious disease hospital, two quarantine hotels (designated for COVID-19 control), and five general hotels in Nanjing, Jiangsu Province, during the COVID-19 pandemic. We focused on detecting disinfectant resistance genes (DRGs), antibiotic resistance genes (ARGs), and mobile genetic elements (MGEs).<br><br>RESULTS: Significant differences were observed in the bacterial community structures on elevator button surfaces across the four types of environments. Quarantine hotels, which implemented the most frequent disinfection protocols, exhibited distinct bacterial profiles at the phylum, genus, and species levels. Both &#x3b1;-diversity (within-sample diversity) and &#x3b2;-diversity (between-sample diversity) were lower and more distinct in quarantine hotels compared to the other environments. The abundance of DRGs, ARGs, and MGEs was also significantly higher on elevator button surfaces in quarantine hotels. Notably, antibiotic-resistant bacteria (ARBs), including Escherichia coli, Acinetobacter baumannii, and Pseudomonas aeruginosa, were detected in all four settings.<br><br>CONCLUSION: The structure of bacterial communities on elevator button surfaces varies across different environments, likely influenced by the frequency of disinfectant use. Increased resistance gene abundance in quarantine hotels suggests that disinfection practices may contribute to the selection and spread of resistant bacteria. Enhanced monitoring of disinfection effectiveness and refinement of protocols in high-risk environments such as hospitals and hotels are essential to limit the spread of resistant pathogens.}, }
@article {pmid40517085, year = {2025}, author = {Schoenle, A and Francis, O and Archibald, JM and Burki, F and de Vries, J and Dumack, K and Eme, L and Florent, I and Hehenberger, E and Hoffmeyer, TT and Irisarri, I and Lara, E and Leger, MM and Lukeš, J and Massana, R and Mathur, V and Nitsche, F and Strassert, JFH and Worden, AZ and Yurchenko, V and Del Campo, J and Waldvogel, AM}, title = {Protist genomics: key to understanding eukaryotic evolution.}, journal = {Trends in genetics : TIG}, volume = {}, number = {}, pages = {}, doi = {10.1016/j.tig.2025.05.004}, pmid = {40517085}, issn = {0168-9525}, abstract = {All eukaryotes other than animals, plants, and fungi are protists. Protists are highly diverse and found in nearly all environments, with key roles in planetary health and biogeochemical cycles. They represent the majority of eukaryotic diversity, making them essential for understanding eukaryotic evolution. However, these mainly unicellular, microscopic organisms are understudied and the generation of protist genomes lags far behind most multicellular lineages. Current genomic methods, which are primarily designed for animals and plants, are poorly suited for protists. Advancing protist genome research requires reevaluating plant- and animal-centric genomic standards. Future efforts must leverage emerging technologies and bioinformatics tools, ultimately enhancing our understanding of eukaryotic molecular and cell biology, ecology, and evolution.}, }
@article {pmid40515809, year = {2025}, author = {Zhang, Z and Yang, Z and Lin, S and Jiang, S and Zhou, X and Li, J and Lu, W and Zhang, J}, title = {Probiotic-induced enrichment of Adlercreutzia equolifaciens increases gut microbiome wellness index and maps to lower host blood glucose levels.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2520407}, pmid = {40515809}, issn = {1949-0984}, mesh = {Humans ; *Probiotics/administration &amp; dosage/pharmacology ; *Gastrointestinal Microbiome/drug effects ; Male ; Female ; *Blood Glucose/analysis/metabolism ; Adult ; Middle Aged ; Metagenomics ; Feces/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Young Adult ; }, abstract = {The gut microbiome is essential for maintaining host health, influencing gut function and metabolic regulation. While probiotics are widely used to manage gut health, evidence of their specific effects in healthy individuals remains limited. Most studies focus on diseased populations, with little attention to early interventions in individuals without major diseases. In this study, we investigated the effects of probiotics on gut health in participants free from significant health conditions. Fifty-four participants were randomly assigned to receive either a placebo or composite probiotics for 60 d. Shotgun metagenomics revealed that individuals with lower baseline Gut Microbiome Wellness Index 2 (GMWI) exhibited more decisive responses to probiotic intervention, characterized by an increased abundance of beneficial commensal bacteria, including Adlercreutzia equolifaciens. Probiotic intake significantly improved the function of the gut microbiome, reducing antibiotic resistance genes and virulence factors while enhancing carbohydrate-active enzymes. Notably, A. equolifaciens promoted the production of palmitoyl serinol, a metabolite associated with improved GMWI and preventive benefits in blood glucose. In a population-based experiment, these findings were validated in a follow-up single-strain probiotic intervention with Lacticaseibacillus casei Zhang. Our study highlights the potential of probiotics as an early intervention strategy for maintaining gut health in individuals without significant health conditions.}, }
@article {pmid40514168, year = {2025}, author = {Ebrahimi, F and Maleki, H and Ebrahimi, M and Beiki, AH}, title = {A novel approach to finding the compositional differences and biomarkers in gut microbiota in type 2 diabetic patients via meta-analysis, data-mining, and multivariate analysis.}, journal = {Endocrinologia, diabetes y nutricion}, volume = {72}, number = {6}, pages = {501561}, doi = {10.1016/j.endien.2025.501561}, pmid = {40514168}, issn = {2530-0180}, mesh = {*Diabetes Mellitus, Type 2/microbiology ; Humans ; *Gastrointestinal Microbiome ; *Data Mining ; Biomarkers/analysis ; Multivariate Analysis ; Male ; Middle Aged ; Female ; }, abstract = {Type 2 diabetes mellitus (T2DM)-one of the fastest globally spreading diseases-is a chronic metabolic disorder characterized by elevated blood glucose levels. It has been suggested that the composition of gut microbiota plays key roles in the prevalence of T2DM. In this study, a novel approach of large-scale data mining and multivariate analysis of the gut microbiome of T2DM patients and healthy controls was conducted to find the key compositional differences in their microbiota and potential biomarkers of the disease.<br><br>METHODS: First, suitable datasets were identified (9 in total with 946 samples), analyzed, and their operational taxonomic units (OTUs) were computed by identical parameters to increase accuracy. The following OTUs were merged and compared based on their health status, and compositional differences detected. For biomarker identification, the OTUs were subjected to 9 different attribute weighting models. Additionally, OTUs were independently analyzed by multivariate algorithms (LEfSe test) to verify the realized biomarkers.<br><br>RESULTS: Overall, 23 genera and 4 phyla were identified as possible biomarkers. At genus level, the decrease of Bacteroides, Methanobrevibacter, Paraprevotella, and [Eubacterium] hallii group in T2DM and the increase of Prevotella, Megamonas, Megasphaera, Ligilactobacillus, and Lachnoclostridium were selected as biomarkers; and at phylum level, the increase of Synergistota and the decrease of Euryarchaeota, Desulfobacterota (Thermodesulfobacteriota), and Ptescibacteria.<br><br>CONCLUSION: This is the first study ever conducted to find the microbial compositional differences and biomarkers in T2DM using data mining models applied on a widespread metagenome dataset and verified by multivariate analysis.}, }
@article {pmid40510676, year = {2025}, author = {Bruins-van Sonsbeek, LGR and Verschuren, MCM and Kaal, S and Lindenburg, PW and Rodenburg, KCW and Clauss, M and Speksnijder, AGCL and Rutten, VPMG and Bonnet, BFJ and Wittink, F}, title = {Rhinoceromics: a multi-amplicon study with clinical markers to transferrin saturation levels in ex-situ black rhinoceros (Diceros bicornis michaeli).}, journal = {Frontiers in microbiology}, volume = {16}, number = {}, pages = {1515939}, pmid = {40510676}, issn = {1664-302X}, abstract = {Iron overload disorder (IOD) is a common condition in ex-situ black rhinoceroses (Diceros bicornis), although it has not been reported in the wild. This study aimed to gain a deeper understanding of the relationship between 25-hydroxy vitamin D [25(OH)D], inflammatory markers, insulin levels, the gut microbiome, dietary components, and transferrin saturation (TS) in ex-situ black rhinoceroses. Blood and fecal samples from 11 black rhinoceroses at five different European zoological institutions were monitored over a 1-year period. Inflammatory markers such as interleukin 6 (IL-6), serum amyloid A (SAA), interferon γ (IFN-γ), and tumor necrosis factor α (TNF-α) were analyzed. Our study corroborates the findings of previous research, which demonstrated that insulin, inflammatory markers, and TS% are higher in ex-situ black rhinoceroses compared to published wild ranges. Our data show no correlations between insulin, 25(OH)D, TS%, inflammatory markers, or short-chain fatty acids (SFCAs). Serum 25(OH)D exhibited significantly higher levels in summer than in winter. Transferrin saturation was influenced by age, which is consistent with previous studies. The microbiome did not differ significantly among individuals, institutions, sex, or season, unlike the mycobiome, which exhibited significant differences across institutions. The impact of the mycobiome differences on the physiology of the animals could not be determined from this study.}, }
@article {pmid40508035, year = {2025}, author = {Toto, F and Scanu, M and Gramegna, M and Putignani, L and Del Chierico, F}, title = {Impact of DNA Extraction and 16S rRNA Gene Amplification Strategy on Microbiota Profiling of Faecal Samples.}, journal = {International journal of molecular sciences}, volume = {26}, number = {11}, pages = {}, pmid = {40508035}, issn = {1422-0067}, support = {Current Research funds//Italian Ministry of Health/ ; n.a.//Technogenetics S.p.A./ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Feces/microbiology ; Humans ; *DNA, Bacterial/genetics/isolation &amp; purification ; *Gastrointestinal Microbiome/genetics ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing/methods ; *Microbiota/genetics ; Bacteria/genetics/classification ; Metagenome ; }, abstract = {High-throughput 16S rRNA metagenomic sequencing has advanced our understanding of the gut microbiome, but its reliability depends on upstream processes such as DNA extraction and bacterial library preparation. In this study, we evaluated the impact of three different DNA extraction methods (a manual method with an ad hoc-designed pre-extraction phase (PE-QIA), and two automated magnetic bead-based methods (T180H and TAT132H)) and two bacterial library preparation protocols (home brew and VeriFi) on the 16S rRNA-based metagenomic profiling of faecal samples. T180H and TAT132H produced significantly higher DNA concentrations than PE-QIA, whereas TAT132H yielded DNA of lower purity compared to the others. In the taxonomic analysis, PE-QIA provided a balanced recovery of Gram-positive and Gram-negative bacteria, TAT132H was enriched in Gram-positive taxa, and T180H was enriched in Gram-negative taxa. An analysis of Microbial Community Standard (MOCK) samples showed that PE-QIA and T180H were more accurate than TAT132H. Finally, the VeriFi method yielded higher amplicon concentrations and sequence counts than the home brew protocol, despite the high level of chimeras. In conclusion, a robust performance in terms of DNA yield, purity, and taxonomic representation was obtained by PE-QIA and T180H. Furthermore, it was found that the impact of PCR-based steps on gut microbiota profiling can be minimized by an accurate bioinformatic pipeline.}, }
@article {pmid40507096, year = {2025}, author = {Lutsiv, T and Fitzgerald, VK and Neil, ES and McGinley, JN and Hussan, H and Thompson, HJ}, title = {Cooked Bean (Phaseolus vulgaris L.) Consumption Alters Bile Acid Metabolism in a Mouse Model of Diet-Induced Metabolic Dysfunction: Proof-of-Concept Investigation.}, journal = {Nutrients}, volume = {17}, number = {11}, pages = {}, pmid = {40507096}, issn = {2072-6643}, support = {58-3060-8-031//USDA ARS/ ; 2020-05206//National Institute for Food and Agriculture:/ ; }, mesh = {Animals ; *Bile Acids and Salts/metabolism ; Mice, Inbred C57BL ; *Phaseolus ; Mice ; Male ; Liver/metabolism ; Disease Models, Animal ; Feces/chemistry ; Cecum/microbiology/metabolism ; Gastrointestinal Microbiome ; Cooking ; Obesity/metabolism ; Metabolomics ; *Diet ; *Metabolic Diseases/etiology/metabolism ; Diet, High-Fat/adverse effects ; }, abstract = {Background/Objectives: Metabolic dysregulation underlies a myriad of chronic diseases, including metabolic dysfunction-associated steatotic liver disease (MASLD) and obesity, and bile acids emerge as an important mediator in their etiology. Weight control by improving diet quality is the standard of care in prevention and control of these metabolic diseases. Inclusion of pulses, such as common bean, is an affordable yet neglected approach to improving diet quality and metabolic outcomes. Thus, this study evaluated the possibility that common bean alters bile acid metabolism in a health-beneficial manner. Methods: Using biospecimens from several similarly designed studies, cecal content, feces, liver tissue, and plasma samples from C57BL/6 mice fed an obesogenic diet lacking (control) or containing cooked common bean were subjected to total bile acid analysis and untargeted metabolomics. RNA-seq, qPCR, and Western blot assays of liver tissue complemented the bile acid analyses. Microbial composition and predicted function in the cecal contents were evaluated using 16S rRNA gene amplicon and shotgun metagenomic sequencing. Results: Bean-fed mice had increased cecal bile acid content and excreted more bile acids per gram of feces. Consistent with these effects, increased synthesis of bile acids in the liver was observed. Microbial composition and capacity to metabolize bile acids were markedly altered by bean, with greater prominence of secondary bile acid metabolites in bean-fed mice, i.e., microbial metabolites of chenodeoxycholate/lithocholate increased while metabolites of hyocholate were reduced. Conclusions: In rendering mice resistant to obesogenic diet-induced MASLD and obesity, cooked bean consumption sequesters bile acids, increasing their hepatic synthesis and enhancing their diversity through microbial metabolism. Bean-induced changes in bile acid metabolism have potential to improve dyslipidemia.}, }
@article {pmid40507017, year = {2025}, author = {Ying, J and Xu, X and Zhou, R and Chung, ACK and Ng, SK and Fan, X and Subramaniam, M and Wong, SH}, title = {The Gut Microbiota in Young Adults with High-Functioning Autism Spectrum Disorder and Its Performance as Diagnostic Biomarkers.}, journal = {Nutrients}, volume = {17}, number = {11}, pages = {}, pmid = {40507017}, issn = {2072-6643}, support = {Nil//NHG-LKCMedicine Clinician-Scientist Preparatory Programme Plus/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Autism Spectrum Disorder/microbiology/diagnosis ; Male ; Female ; Biomarkers ; Young Adult ; Adult ; Case-Control Studies ; Feces/microbiology ; Metagenomics ; Machine Learning ; ROC Curve ; Adolescent ; }, abstract = {Background/Objectives: Diagnosing ASD in adults presents unique challenges, and there are currently no specific biomarkers for this condition. Most existing studies on the gut microbiota in ASD are conducted in children; however, the composition of the gut microbiota in children differs significantly from that of adults. This study aimed to study the gut microbiota of young adults with high-functioning ASD. Methods: Using metagenomic sequencing, we evaluated the gut microbiota in 45 adults with high-functioning ASD and 45 matched healthy controls. Results: Adjusting for sociodemographic information, dietary habits, and clinical data, we observed a distinct microbiota profile of adults with ASD in comparison to controls, with the intensity of autistic traits strongly correlating to microbial diversity (correlation coefficient = -0.351, p-value < 0.001). Despite a similar dietary pattern, the ASD group exhibited more gastrointestinal symptoms than the healthy controls. An internally validated machine-learning predictive model that combines the Autism Spectrum Quotient questionnaire score of individuals with their microbial features could achieve an area under the receiver operating characteristic curve (AUC) of 0.955 in diagnosing ASD in adults. Conclusions: This study evaluates the gut microbiota in adult ASD and highlights its potential as a non-invasive biomarker to enhance the diagnosis of ASD in this population group.}, }
@article {pmid40506497, year = {2025}, author = {Jung, DR and Choi, Y and Jeong, M and Singh, V and Jeon, SY and Seo, I and Park, NJ and Lee, YH and Park, JY and Han, HS and Shin, JH and Chong, GO}, title = {Metagenomic insight into the vaginal microbiome in women infected with HPV 16 and 18.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {105}, pmid = {40506497}, issn = {2055-5008}, mesh = {Female ; Humans ; *Vagina/microbiology/virology ; *Human papillomavirus 16/genetics/isolation &amp; purification ; *Papillomavirus Infections/virology/microbiology ; *Microbiota/genetics ; Metagenomics ; *Human papillomavirus 18/genetics/isolation &amp; purification ; *Bacteria/classification/genetics/isolation &amp; purification ; Uterine Cervical Neoplasms/virology/microbiology ; Metagenome ; Adult ; Middle Aged ; }, abstract = {Human papillomavirus (HPV) 16 and 18 (HPV 16/18) account for over 70% of cervical cancer (CC) cases, yet their interaction with the vaginal microbiome (VM) remains unclear. This study explored the association between high-risk HPV types (HR-HPVs), VM composition and bacterial function using shotgun metagenomic sequencing. In early-stage cervical lesions, the HPV 16/18 group showed reduced Lactobacillus-dominant community state types compared to other HR-HPVs, while invasive CC exhibited increased pathogenic bacteria, including Streptococcus agalactiae, Fannyhessea vaginae, and Sneathia vaginalis. The VM associated with HPV 16/18 was enriched in immune response and inflammation pathways, whereas other HR-HPVs were linked to cellular metabolism and hormonal signaling. Notably, HPV 16/18 exhibited stronger bacterial-fungal correlations, indicating shifts in the microbial community. Furthermore, 137 metagenome-assembled genomes provided insights into unique microbial genomic signatures. Our study links VM differences with HPV 16/18 oncogenic potential across cervical lesion stages, urging further research for better diagnostics and treatments.}, }
@article {pmid40506443, year = {2025}, author = {Bredon, M and Hausfater, P and Khalki, L and Tijani, Y and Cheikh, A and Brot, L and Creusot, L and Rolhion, N and Trottein, F and Lambeau, G and Georgin-Lavialle, S and Bleibtreu, A and Baudel, JL and Lefèvre, A and Emond, P and Tubach, F and Simon-Tillaux, N and Simon, T and Gorochov, G and Zaid, Y and Sokol, H}, title = {Gut microbiota alterations are linked to COVID-19 severity in North African and European populations.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {106}, pmid = {40506443}, issn = {2055-5008}, support = {ANR-23-CE15-0014-01, GUTSY//AAP g&#xe9;n&#xe9;rique 2022/ ; ANR-23-CE15-0014-01, GUTSY//AAP g&#xe9;n&#xe9;rique 2022/ ; PR-BLV-20220527//Balvi Filantropic Fund/ ; RPH20003DDP//DIM One Health 2020/ ; }, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Bacteria/classification/genetics/isolation &amp; purification ; *COVID-19/microbiology/pathology ; *Dysbiosis/microbiology ; Feces/microbiology ; France/epidemiology ; *Gastrointestinal Microbiome/genetics ; Metagenomics ; Morocco/epidemiology ; North African People ; Severity of Illness Index ; }, abstract = {Although COVID-19 primarily affects the respiratory system, many patients experience gastrointestinal symptoms, suggesting a role for the gut microbiota in disease pathogenesis. To explore this, we performed shotgun metagenomic sequencing on stool samples from 200 COVID-19 patients and 102 healthy controls in Morocco and France. Despite geographic differences in microbiota composition, patients with COVID-19 in both continents exhibited significant gut microbiota alterations, which were more pronounced in severe cases, with similar features compared with controls. Functional pathways, including L-Tryptophan biosynthesis, were disrupted, particularly in patients with severe disease. Machine learning models accurately predicted disease severity based on gut microbial profiles in the Moroccan cohort, though not in the French cohort. These results highlight consistent microbiota changes associated with COVID-19 and support a potential link between gut dysbiosis and disease severity.}, }
@article {pmid40503898, year = {2025}, author = {Han, H and Ji, M and Li, Y and Gong, X and Song, W and Zhou, J and Ma, K and Zhou, Y and Liu, X and Wang, M and Li, Y and Tu, Q}, title = {Tracing non-fungal eukaryotic diversity via shotgun metagenomes in the complex mudflat intertidal zones.}, journal = {mSystems}, volume = {}, number = {}, pages = {e0041325}, doi = {10.1128/msystems.00413-25}, pmid = {40503898}, issn = {2379-5077}, abstract = {Eukaryotes, both micro- and macro-, constitute the dominant component of Earth's biosphere visible to the naked eye. Although relatively big in organismal size, tracing eukaryotic diversity in complex environments is not easy. For example, they may actively escape from sampling and be physically absent from the collected samples. In this study, we strived to recover non-fungal eukaryotic DNA sequences from typical shotgun metagenomes in the complex mudflat intertidal zones. Multiple recently developed approaches for identifying eukaryotic sequences from shotgun metagenomes were comparatively assessed. Considering the low overlap among different approaches, an integrative workflow was proposed. The integrative workflow was then used to recover the eukaryotic communities in complex intertidal sediments. The temporal dynamics of intertidal eukaryotic communities were investigated through a time-series sampling effort. Thirty-four non-fungal eukaryotic phyla were detected from 36 shotgun metagenomes. Clear temporal variation in relative abundance was observed for eukaryotic genera such as Timema and Navicula. Strong temporal turnover of intertidal eukaryotic communities was observed. By comparing to 18S rRNA gene amplicon sequencing, dramatically different community profiles were observed between these two approaches. However, the temporal patterns for intertidal eukaryotic communities recovered by both approaches were generally comparable. This study provides valuable technical insights into the recovery of non-fungal eukaryotic information from complex environments and demonstrates an alternative route for reusing the massive metagenomic data sets generated in the past and future.IMPORTANCEEukaryotes represent the dominant component visible to the naked eye and contribute to the primary biomass in the Earth's biosphere. Yet, tracing the eukaryotic diversity in complex environments remains difficult, as they can actively move around and escape from sampling. Here, using the intertidal sediments as an example, we strived to retrieve non-fungal eukaryotic sequences from typical shotgun metagenomes. Compared to 18S rRNA gene amplicon sequencing, the shotgun metagenome-based approach resolved dramatically different eukaryotic community profiles, though comparable ecological patterns could be observed. This study paves an alternative way for utilizing shotgun metagenomic data to recover non-fungal eukaryotic information in complex environments, demonstrating significant potential for environmental monitoring and biodiversity investigations.}, }
@article {pmid40500753, year = {2025}, author = {Bograd, A and Oppenheimer-Shaanan, Y and Levy, A}, title = {Plasmids, prophages, and defense systems are depleted from plant microbiota genomes.}, journal = {Genome biology}, volume = {26}, number = {1}, pages = {163}, pmid = {40500753}, issn = {1474-760X}, support = {1535/20//Israeli Science Foundation/ ; 1535/20//Israeli Science Foundation/ ; 1535/20//Israeli Science Foundation/ ; 1001695377//Israeli Ministry of Innovation, Science, and Technology/ ; 1001695377//Israeli Ministry of Innovation, Science, and Technology/ ; 1001695377//Israeli Ministry of Innovation, Science, and Technology/ ; 81259//Israel Innovation Authority/ ; 81259//Israel Innovation Authority/ ; 81259//Israel Innovation Authority/ ; 12-12-0008//Ministry of Agriculture and Rural Development/ ; 12-12-0008//Ministry of Agriculture and Rural Development/ ; 12-12-0008//Ministry of Agriculture and Rural Development/ ; ZN4041//Volkswagen Stiftung/ ; ZN4041//Volkswagen Stiftung/ ; ZN4041//Volkswagen Stiftung/ ; }, mesh = {*Prophages/genetics ; *Plasmids/genetics ; *Plants/microbiology ; *Genome, Bacterial ; *Microbiota/genetics ; Metagenome ; *Bacteria/genetics/virology ; }, abstract = {Plant-associated bacteria significantly impact plant growth and health. Understanding how bacterial genomes adapt to plants can provide insights into their growth promotion and virulence functions. Here, we compare 38,912 bacterial genomes and 6073 metagenomes to explore the distribution of mobile genetic elements and defense systems in plant-associated bacteria. We reveal a consistent taxon-independent depletion of prophages, plasmids, and defense systems in plant-associated bacteria, particularly in the phyllosphere, compared to other ecosystems. The mobilome depletion suggests the presence of unique ecological constraints or molecular mechanisms exerted by plants to control the bacterial mobilomes independently of bacterial immunity.}, }
@article {pmid40497237, year = {2025}, author = {Feng, Y and Kuang, G and Pan, Y and Wang, J and Yang, W and Wu, WC and Pan, H and Wang, J and Han, X and Yang, L and Xin, GY and Shan, YT and Gou, QY and Liu, X and Guo, D and Liang, G and Holmes, EC and Gao, Z and Shi, M}, title = {Small mammals in a biodiversity hotspot harbor viruses of emergence risk.}, journal = {National science review}, volume = {12}, number = {6}, pages = {nwae463}, pmid = {40497237}, issn = {2053-714X}, abstract = {Metagenomic sequencing has transformed the understanding of viral diversity in wildlife and the potential threats these viruses pose to human health. Despite this progress, such sequencing studies often have lacked systematic and ecologically informed sampling, thereby likely missing many potential human pathogens and the drivers behind their ecology, evolution and emergence. We conducted an extensive search for viruses in the lungs, spleens and guts of 1688 mammals from 38 species across 428 sites in Yunnan Province, China-a hotspot for zoonoses emergence. We identified 162 mammalian viruses, including 102 new ones and 24 posing potential risks to humans due to their relationships with known human pathogens associated with serious diseases or their ability to cross major host species barriers. Our findings offer an in-depth view of virus organotropism, cross-host associations, host sharing patterns, and the ecological factors influencing viral evolution, all of which are critical for anticipating and mitigating future zoonotic outbreaks.}, }
@article {pmid40495477, year = {2025}, author = {Hurst, C and Zobel, G and Young, W and Olson, T and Parkar, N and Bracegirdle, J and Hannaford, R and Anderson, RC and Dalziel, JE}, title = {Social Isolation Induces Sex-Specific Differences in Behavior and Gut Microbiota Composition in Stress-Sensitive Rats.}, journal = {Brain and behavior}, volume = {15}, number = {6}, pages = {e70621}, pmid = {40495477}, issn = {2162-3279}, support = {//Smarter Lives: New opportunities for dairy products across the lifespan/ ; C10X1706//Ministry of Business, Innovation and Employment/ ; }, mesh = {Animals ; Male ; Female ; *Gastrointestinal Microbiome/physiology ; Rats ; *Social Isolation/psychology ; *Stress, Psychological/microbiology/physiopathology ; *Behavior, Animal/physiology ; Rats, Inbred WKY ; Anxiety ; *Sex Characteristics ; Sex Factors ; Cecum/microbiology ; }, abstract = {BACKGROUND: Social isolation (SI) is an established rat model of chronic stress. We applied this to the stress-sensitive Wistar Kyoto (WKY) strain to explore brain-to-gut interactions associated with mood. Whether SI stress-induced behavioral changes are sex-specific or if they affect the microbiome in WKY is unknown. We hypothesized individually housed (IH) animals would be more anxious than pair-housed (PH), with sex differences. Male and female rats were either IH or PH from 70 to 112 days old and behavior was assessed in modified open field (OFTmod), elevated plus maze (EPM), and novel object recognition (NOR) tests. Cecal content DNA was analyzed by shotgun metagenome sequencing.<br><br>RESULTS: IH rats, particularly females, spent more time in the center of the OFTmod where the semi-novel feed was presented compared to PH group rats. There was a tendency for greater distance traveled, or potential hyperactivity, in IH female rats. Males stayed in the EPM closed arms more than females. No treatment difference occurred for recognition memory. SI altered cecal microbiome composition in females where housing was associated with seven differentially abundant taxa and 49 differentially abundant KEGG Level 3 ortholog/gene categories. Several relationships were noted between behavioral traits and relative abundance of microbiome taxa. There was a greater shift in female microbiome composition.<br><br>CONCLUSIONS: In summary, behavioral responses to the housing treatment were minimal. IH animals, particularly females, spent more time in the center of an OFT that contained food; this may have been an indication of depression, as opposed to anxiety. Housing status had a differential impact on the microbiome for females compared to males. The associations between cecal microbiota and activity in the modified OFT suggest that dietary interventions that influence the relative abundance of Bifidobacteria, Alistipes, and Muribaculaceae should be explored.}, }
@article {pmid40494297, year = {2025}, author = {Hibbett, D and Nagy, LG and Nilsson, RH}, title = {Fungal diversity, evolution, and classification.}, journal = {Current biology : CB}, volume = {35}, number = {11}, pages = {R463-R469}, doi = {10.1016/j.cub.2025.01.053}, pmid = {40494297}, issn = {1879-0445}, mesh = {*Fungi/classification/genetics ; Phylogeny ; *Biodiversity ; *Biological Evolution ; }, abstract = {Fungi include mushrooms, molds, lichens, yeasts, and zoosporic forms that occur as free-living or symbiotic organisms in every ecosystem on Earth. About 155,000 species of Fungi have been described, and possibly millions more remain to be named. Recent focus on aquatic habitats has illuminated major groups near the boundary between Fungi and protists. Fungal systematists have made remarkable progress toward resolving the major branches of the phylogeny, although some deep nodes have proven recalcitrant. Fungal taxonomists steadily describe about 3,000 new species per year, and fungal molecular ecologists routinely detect many thousands of unidentifiable 'dark fungi' through metagenomic analyses. To assemble the complete fungal tree of life, it will be necessary to connect the main branches of the phylogeny to information on all described species and integrate the vast and rapidly growing corpus of dark fungi.}, }
@article {pmid40493399, year = {2025}, author = {Han, S and Zhang, Q and Zhang, H and Ma, J}, title = {Eucommia ulmoides and its inhibitory effects on prevotella in piglet gut microbiome through metagenomic and metabolomic analysis.}, journal = {Animal biotechnology}, volume = {36}, number = {1}, pages = {2503753}, doi = {10.1080/10495398.2025.2503753}, pmid = {40493399}, issn = {1532-2378}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Prevotella/drug effects ; Swine/microbiology/growth &amp; development ; *Eucommiaceae/chemistry ; Animal Feed/analysis ; Metagenomics ; Metabolomics ; Diet/veterinary ; Dietary Supplements ; Feces/microbiology ; }, abstract = {Eucommia ulmoides (EU) is a traditional medicinal plant widely cultivated across China. The combination of EU and feed significantly affects the growth performance, intestinal microbiota composition, and metabolic characteristics of weaned piglets. Forty Landrace x Yorkshire piglets were randomly assigned to four groups: a control group receiving a basal diet, three treatment groups receiving a basal diet supplemented with EU and EU with mix energy (EU+ME), and EU with high protein and energy (EU+HPE), respectively. Growth performance was monitored over a 25-day feeding period, and fecal samples were collected for subsequent metagenomic sequencing and metabolomic analysis. Piglets supplemented with EU, EU+ME, and EU+HPE exhibited significantly improved growth performance, compared to the control group. Metagenomic analysis revealed significant alterations in gut microbiota composition, with increased beneficial bacterial classes and suppression of Prevotella spp. Metabolomic profiling demonstrated distinct metabolic alterations among the treatment groups, with pathway impact analysis highlighting enhanced protein synthesis and energy metabolism. Furthermore, EU supplementation did not affect porcine epidemic diarrhea virus activity in vitro but reduced LPS-induced intestinal inflammation. These findings suggest that EU could be a promising natural additive for improving piglet health and growth, with potential implications for managing post-weaning challenges in swine production.}, }
@article {pmid40491436, year = {2025}, author = {Li, D and Zhang, DY and Chen, SJ and Lv, YT and Huang, SM and Chen, C and Zeng, F and Chen, RX and Zhang, XD and Xiong, JX and Chen, FD and Jiang, YH and Chen, Z and Mo, CY and Chen, JJ and Zhu, XL and Zhang, LJ and Bai, FH}, title = {Long-term alterations in gut microbiota following mild COVID-19 recovery: bacterial and fungal community shifts.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1565887}, pmid = {40491436}, issn = {2235-2988}, mesh = {Humans ; *COVID-19/microbiology ; *Gastrointestinal Microbiome ; *Fungi/classification/genetics/isolation &amp; purification ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Adult ; Middle Aged ; Feces/microbiology ; SARS-CoV-2 ; *Mycobiome ; Probiotics ; Metagenomics ; China ; }, abstract = {OBJECTIVE: COVID-19 has had a profound impact on public health globally. However, most studies have focused on patients with long COVID or those in the acute phase of infection, with limited research on the health of individuals who have recovered from mild COVID-19. This study investigates the long-term changes in bacterial and fungal communities in individuals recovering from mild COVID-19 and their clinical relevance.<br><br>METHODS: Healthy individuals from Hainan Province were enrolled before the COVID-19 outbreak, along with individuals recovering from COVID-19 at 3 months and 6 months post-recovery. Stool, blood samples, and metadata were collected. Metagenomic sequencing and Internal Transcribed Spacer (ITS) analysis characterized bacterial and fungal communities, while bacterial-fungal co-occurrence networks were constructed. A random forest model evaluated the predictive capacity of key taxa.<br><br>RESULTS: The gut microbiota of COVID-19 recoverees differed significantly from that of healthy individuals. At 3 months post-recovery, probiotics (e.g., Blautia massiliensis and Kluyveromyces spp.) were enriched, linked to improved metabolism, while at 6&#xa0;months, partial recovery of probiotics (e.g., Acidaminococcus massiliensis and Asterotremella spp.) was observed alongside persistent pathogens (e.g., Streptococcus equinus and Gibberella spp.). Dynamic changes were observed, with Acidaminococcus massiliensis enriched at both baseline and 6 months but absent at 3 months. Co-occurrence network analysis revealed synergies between bacterial (Rothia spp.) and fungal (Coprinopsis spp.) taxa, suggesting their potential roles in gut restoration. The bacterial random forest model (10 taxa) outperformed the fungal model (8 taxa) in predicting recovery status (AUC = 0.99 vs. 0.80).<br><br>CONCLUSION: These findings highlight the significant long-term impacts of mild&#xa0;COVID-19 recovery on gut microbiota, with key taxa influencing metabolism and immune regulation, supporting microbiome-based strategies for recovery management.}, }
@article {pmid40490984, year = {2025}, author = {Vargas, BO and Carazzolle, MF and Galhardo, JP and José, J and de Souza, BC and Correia, JBL and Santos, JRD and Pereira, GAG and de de Mello, FDSB}, title = {Engineering Saccharomyces Cerevisiae With Novel Functional Xylose Isomerases From Rumen Microbiota for Enhanced Biofuel Production.}, journal = {Biotechnology journal}, volume = {20}, number = {6}, pages = {e70050}, pmid = {40490984}, issn = {1860-7314}, support = {//National Agency of Petroleum, Natural Gas and Biofuels/ ; JPG: 88887.479699/2020-0//National Council for the Improvement of Higher Education/ ; JRS: 142340/2020-0//National Council for the Improvement of Higher Education/ ; BCS: 2022/05001-4//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa no Estado de S&#xe3;o Paulo/ ; }, mesh = {*Saccharomyces cerevisiae/genetics/metabolism/enzymology ; Animals ; *Rumen/microbiology ; *Biofuels ; Sheep ; Xylose/metabolism ; Cattle ; Camelus/microbiology ; *Metabolic Engineering/methods ; Ethanol/metabolism ; Fermentation ; Microbiota/genetics ; Aldose-Ketose Isomerases ; }, abstract = {Xylose metabolism in Saccharomyces cerevisiae remains a significant bottleneck due to the difficulty in identifying functional and efficient xylose isomerases (XI). In the present study, publicly available metagenomic and metatranscriptomic datasets of rumen microbiota from different herbivorous mammals were used to prospect novel XIs sequences. Seven putative XIs from moose, camel, cow, and sheep were cloned into a strain modified for xylose metabolism. Out of those, five XIs demonstrated activity and efficiently converted xylose into xylulose, resulting in ethanol as the final product. A XI from camel rumen microbiota exhibited a KM of 16.25 mM, indicating high substrate affinity. The strains expressing enzymes XI11 and XI12, obtained from sheep rumen microbiota, were able to deplete 40 g/L of xylose within 72 and 96 h, achieving theoretical ethanol yields of 90% and 88%, respectively. These results are comparable to those obtained with Orpinomyces sp. ukk1 XI, a benchmark enzyme previously reported as highly efficient in S. cerevisiae. This study also provides the first report on the successful expression of XIs mined from the ruminal microbiotas of sheep and camels in S. cerevisiae, expanding the perspectives for the optimization of fermentation processes and the production of lignocellulosic biofuels from xylose.}, }
@article {pmid40489326, year = {2025}, author = {Sun, Y and Guo, K and Tang, J and Zhao, J and Zhang, X and Yan, Y and Yuan, L and Zhang, Y and Qiu, C and Luo, J and Zhang, W and Fang, H and Chen, J}, title = {Changes of respiratory microbiota associated with prognosis in pulmonary infection patients with invasive mechanical ventilation-supported respiratory failure.}, journal = {Annals of medicine}, volume = {57}, number = {1}, pages = {2514093}, pmid = {40489326}, issn = {1365-2060}, mesh = {Humans ; Male ; Female ; Retrospective Studies ; *Respiration, Artificial/methods/adverse effects ; Prognosis ; *Respiratory Insufficiency/therapy/microbiology/mortality ; Middle Aged ; Aged ; *Microbiota/genetics ; Intensive Care Units/statistics &amp; numerical data ; High-Throughput Nucleotide Sequencing ; *Respiratory Tract Infections/microbiology/mortality ; Anti-Bacterial Agents/therapeutic use ; Risk Factors ; }, abstract = {BACKGROUND: Respiratory failure (RF) is an important cause of intensive care unit (ICU) admission and mortality due to respiratory diseases. This study aimed to evaluate the clinical performance of metagenomic next-generation sequencing (mNGS) testing in pathogen diagnosis, medication guidance and to explore dynamic changes in the respiratory microbiota associated with prognosis.<br><br>METHODS: This multicenter retrospective study enrolled ICU patients from five hospitals who underwent invasive mechanical ventilation (IMV) and had pathogenic microorganisms identified by both mNGS and conventional microbiological tests (CMT) from December 2021 to April 2024. Patients were classified into two groups based on discharge outcomes: survivors (n=122) and non-survivors (n=35).<br><br>RESULTS: Compared with the survivors, non-survivors had a significantly higher proportion of smokers, dyspnea, type I RF, blood urea nitrogen, and C-reactive protein (p < 0.05). All the above indicators were identified as independent risk factors for mortality, except for type I RF. mNGS showed a better performance for pathogen identification than CMT in both groups, and nearly 60% showed consistent results between the two methods. Among survivors, antibiotic adjustment was mainly based on mNGS results (35.25%), whereas non-survivors more frequently received adjustments based on mNGS and CMT results (34.29%). The richness and abundance of lung microorganisms in the non-survivors were significantly lower than those in the survivors (p < 0.05).<br><br>CONCLUSIONS: mNGS is a promising method for identifying pathogens in pulmonary infections in IMV-supported RF patients and for exploring changes in lung microbial composition to provide a reference for patient prognosis.}, }
@article {pmid40488306, year = {2025}, author = {Yoshimura, E and Hamada, Y and Hatamoto, Y and Nakagata, T and Nanri, H and Nakayama, Y and Iwasaka, C and Hayashi, T and Suzuki, I and Ando, T and Ishikawa-Takata, K and Tanaka, S and Ono, R and Araki, M and Kawashima, H and Chen, YA and Park, J and Hosomi, K and Mizuguchi, K and Kunisawa, J and Miyachi, M}, title = {Effect of short-term dietary intervention on fecal serotonin, gut microbiome-derived tryptophanase, and energy absorption in a randomized crossover trial: an exploratory analysis.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2514137}, pmid = {40488306}, issn = {1949-0984}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Feces/chemistry/microbiology ; Cross-Over Studies ; Male ; *Serotonin/analysis/metabolism ; Adult ; Female ; Young Adult ; *Tryptophanase/metabolism/analysis/genetics ; Energy Metabolism ; *Diet ; Bacteria/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; }, abstract = {In this study, we investigated the effects of short-term energy loads on changes in gut microbiome-derived tryptophanase and fecal serotonin levels and their association with variations in energy absorption. This randomized crossover energy-load intervention study included 15 healthy participants subjected to three dietary conditions - overfeeding, control, and underfeeding - for eight days. The effects of the dietary conditions on energy absorption (digestible and metabolizable energy) were assessed using a bomb calorimeter. Fecal serotonin levels were assessed using LC-MS/MS, and the gut microbiota was analyzed using the 16S rRNA gene and metagenomic shotgun analysis. Significant differences were observed in digestible energy (p < 0.001), with higher values in the overfeeding than in the control (p = 0.032) conditions. Furthermore, significant differences were noted in metabolizable energy and gut transit time (p < 0.001), both of which were higher in the overfeeding than in the control (metabolizable energy: p = 0.001; gut transit time: p = 0.014) and underfeeding (metabolizable energy: p < 0.001; gut transit time: p = 0.004) conditions. Fecal serotonin levels differed significantly (p < 0.001), with significantly lower levels in the overfeeding than in the control (p = 0.005) and underfeeding (p < 0.001) conditions. Tryptophanase exhibited significant differences (p = 0.0019), with lower gene abundance in the overfeeding than in the underfeeding (p = 0.001) condition. Tryptophanase positively correlated with Bacteroides abundance under all conditions (correlation coefficient: 0.696-0.896). Intra-individual variability in fecal serotonin levels was significantly negatively associated with digestible energy (β = -0.077, p = 0.019). The findings suggest that short-term energy loads dynamically alter fecal serotonin, Bacteroides, and tryptophanase levels. Moreover, changes in fecal serotonin levels might be indirectly associated with energy absorption.}, }
@article {pmid40484531, year = {2025}, author = {Hu, Q and Cheng, S and Qian, D and Wang, Y and Xie, G and Peng, Q}, title = {Identification of core microbial communities and their influence on flavor-oriented traditional fermented sour cucumbers.}, journal = {Food microbiology}, volume = {131}, number = {}, pages = {104810}, doi = {10.1016/j.fm.2025.104810}, pmid = {40484531}, issn = {1095-9998}, mesh = {Volatile Organic Compounds/metabolism/analysis ; Fermentation ; *Cucumis sativus/microbiology/chemistry ; *Fermented Foods/microbiology/analysis ; Taste ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; *Flavoring Agents/metabolism ; Humans ; *Microbial Consortia ; Food Microbiology ; *Microbiota ; }, abstract = {Sour cucumber is a traditional fermented vegetable with global popularity, yet its fermentation process often leads to inconsistencies in quality and flavor due to the reliance on natural fermentation. This study identifies 12 core volatile organic compounds (VOCs) contributing to its unique flavor and investigates the key microbial species involved in the fermentation process. Using a synthetic microbial consortium constructed from core microbial species, we successfully replicated the flavor profile of naturally fermented sour cucumbers while enhancing safety by reducing nitrite levels. This approach also reduced bitterness and astringency, while improving sourness and umami, providing a robust framework for standardized production of high-quality fermented vegetables. These findings offer practical solutions for improving flavor quality and ensuring the safety of fermented foods.}, }
@article {pmid40483623, year = {2025}, author = {Chi, Y and Luo, M and Ding, C}, title = {The role of microbiota in fish spoilage: biochemical mechanisms and innovative preservation strategies.}, journal = {Antonie van Leeuwenhoek}, volume = {118}, number = {7}, pages = {89}, pmid = {40483623}, issn = {1572-9699}, support = {202411049301XJ//National College Student Innovation and Entrepreneurship Training Program Funding Project/ ; }, mesh = {*Fishes/microbiology ; *Microbiota ; Animals ; *Food Preservation/methods ; *Food Microbiology ; *Seafood/microbiology ; *Bacteria/metabolism/classification/genetics ; }, abstract = {Fish spoilage is a microbially-mediated biochemical process resulting in quality deterioration, economic losses, and food safety risks. Studies have indicated that spoilage microbiota are phylogenetically diverse, with Gram-negative bacteria (Pseudomonas, Shewanella, Photobacterium) representing primary spoilage organisms, and Gram-positive bacteria (Lactobacillus, Brochothrix) causing spoilage only under specific conditions. Microorganisms cause spoilage through the utilization of three main metabolic processes: (i) proteolytic degradation of muscle proteins, (ii) lipolytic breakdown of triglycerides, and (iii) production of volatile bioactive organic compounds and biogenic amines. By combining high-throughput sequencing with metabolomics, researchers have been uncovering strain-specific metabolic networks and how they are influenced by environmental factors such as temperature, pH, and packaging. This review systematically examines: (1) patterns of taxonomic succession in spoilage microbiota, (2) enzymatic and biochemical pathways involved in spoilage, and (3) innovative preservation strategies targeting spoilage consortia. Emerging technologies, such as bacteriocin-mediated biopreservation, phage therapy, and modified atmosphere packaging, show considerable promise in inhibiting spoilage organisms while maintaining the sensory qualities of the fish. Microbiome-directed interventions combined with predictive modeling and precision storage systems also represent a novel approach to fish preservation. There is a critical need to integrate traditional microbiology with the use of multi-omic technologies for the development of sustainable, microbiota-based preservation strategies that address global seafood security challenges.}, }
@article {pmid40483486, year = {2025}, author = {Bergholm, J and Tessema, TS and Blomström, AL and Berg, M}, title = {Metagenomic insights into the complex viral composition of the enteric RNA virome in healthy and diarrheic calves from Ethiopia.}, journal = {Virology journal}, volume = {22}, number = {1}, pages = {188}, pmid = {40483486}, issn = {1743-422X}, support = {2021-04343//Vetenskapsr&#xe5;det/ ; 2021-04343//Vetenskapsr&#xe5;det/ ; 2021-04343//Vetenskapsr&#xe5;det/ ; 2021-04343//Vetenskapsr&#xe5;det/ ; }, mesh = {Animals ; Cattle ; Ethiopia/epidemiology ; *Diarrhea/veterinary/virology ; *Virome ; Metagenomics ; *Cattle Diseases/virology ; Feces/virology ; *RNA Viruses/genetics/classification/isolation &amp; purification ; Phylogeny ; Genome, Viral ; RNA, Viral/genetics ; High-Throughput Nucleotide Sequencing ; }, abstract = {BACKGROUND: Viruses and the virome have received increased attention in the context of calf diarrhea and with the advancement of high-throughput sequencing the detection and discovery of viruses has been improved. Calf diarrhea, being the main contributor to calf morbidity and mortality, is a major issue within the livestock sector in Ethiopia. However, studies on viruses and the virome in calves is lacking in the country. Therefore, we utilized viral metagenomics to investigate the diversity of RNA viruses in healthy and diarrheic calves from central Ethiopia.<br><br>METHODS: Fecal material from 47 calves were collected, pooled, and sequenced using Illumina. Following sequencing, the virome composition and individual viral sequences were investigated using bioinformatic analysis.<br><br>RESULTS: The metagenomic analysis revealed the presence of several RNA viruses, including rotavirus and bovine coronavirus, known causative agents in calf diarrhea. In addition, several enteric RNA viruses that have not been detected in cattle in Ethiopia previously, such as norovirus, nebovirus, astrovirus, torovirus, kobuvirus, enterovirus, boosepivirus and hunnivirus were identified. Furthermore, a highly divergent viral sequence, which we gave the working name suluvirus, was found. Suluvirus showed a similar genome structure to viruses within the Picornaviridae family and phylogenetic analysis showed that it clusters with crohiviruses. However, due to its very divergent amino acid sequence, we propose that suluvirus represent either a new genus within the Picornaviridae or a new species within crohiviruses.<br><br>CONCLUSIONS: To our knowledge, this is the first characterization of the RNA virome in Ethiopian cattle and the study revealed multiple RNA viruses circulating in both diarrheic and healthy calves, as well as a putative novel virus, suluvirus. Our study highlights that viral metagenomics is a powerful tool in understanding the divergence of viruses and their possible association to calf diarrhea, enabling characterization of known viruses as well as discovery of novel viruses.}, }
@article {pmid40481853, year = {2025}, author = {Chaverri, P and Escudero-Leyva, E and Mora-Rojas, D and Calvo-Obando, A and González, M and Escalante-Campos, E and Mesén-Porras, E and Wicki-Emmenegger, D and Rojas-Gätjens, D and Avey-Arroyo, J and Campos-Hernández, M and Castellón, E and Moreira-Soto, A and Drexler, JF and Chavarría, M}, title = {Differential Microbial Composition and Fiber Degradation in Two Sloth Species (Bradypus variegatus and Choloepus hoffmanni).}, journal = {Current microbiology}, volume = {82}, number = {7}, pages = {327}, pmid = {40481853}, issn = {1432-0991}, support = {VI 809-C3-102//Vicerrector&#xed;a de Investigaci&#xf3;n, Universidad de Costa Rica/ ; 57592642//Deutscher Akademischer Austauschdienst/ ; }, mesh = {Animals ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Gastrointestinal Microbiome ; Cellulose/metabolism ; *Dietary Fiber/metabolism ; *Fungi/classification/metabolism/genetics/isolation &amp; purification ; Metagenomics ; }, abstract = {Sloths have the slowest digestion among mammals, requiring 5-20 times longer to digest food than other herbivores, which suggests differences in their gut microbiota, particularly in plant-fiber-degrading microorganisms. Bradypus variegatus has a lower metabolic rate and moves less than Choloepus hoffmanni. However, no comprehensive studies have compared the microbiota (e.g., fungi) of these species. We hypothesized that differences in digestion and metabolism between the two species would be reflected in their microbiota composition and functionality, which we characterized using metagenomics, metabarcoding, and cellulose degradation. Results revealed significant differences in microbiota composition and functionality. Both species are dominated by bacteria; fungi comprised only 0.06-0.5% of metagenomic reads. Neocallimastigomycota, an anaerobic fungus involved in fiber breakdown in other herbivores, was found in low abundance, especially in B. variegatus. Bacterial communities showed subtle differences: C. hoffmanni was dominated by Bacillota and Bacteroidota, while B. variegatus showed higher Actinomycetota. Expected herbivore bacterial taxa (e.g., Fibrobacter and Prevotella) were scarce. Functional analysis showed a low abundance of carbohydrate-active enzymes essential for polysaccharide breakdown. Cellulose degradation assays confirmed that sloths digest only ~ 3-30% of ingested plant material. This research sheds light on the potential multidirectional links between the gut microbiota, metabolism, and digestion.}, }
@article {pmid40475999, year = {2025}, author = {Hwang, D and Chong, E and Li, Y and Li, Y and Roh, K}, title = {Deciphering the gut microbiome's metabolic code: pathways to bone health and novel therapeutic avenues.}, journal = {Frontiers in endocrinology}, volume = {16}, number = {}, pages = {1553655}, pmid = {40475999}, issn = {1664-2392}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Bone and Bones/metabolism ; Animals ; Probiotics/therapeutic use ; *Bone Remodeling/physiology ; *Osteoporosis/metabolism/microbiology/therapy ; Prebiotics ; Fecal Microbiota Transplantation ; Bone Diseases/metabolism/microbiology/therapy ; }, abstract = {The gut microbiome plays an important role in the protection against various systemic diseases. Its metabolic products profoundly influence a wide range of pathophysiological events, including the regulation of bone health. This review discusses the recently established connections between the gut microbiome and bone metabolism, focusing on the impact of microbiome-derived metabolites such as SCFAs, Bile Acids, and tryptophan to the control of bone remodeling and immunoreactions. Recent advances in metagenomics and microbiome profiling have unveiled new exciting therapeutic opportunities, ranging from the use of probiotics, prebiotics, engineered microbes, and to fecal microbiota transplantation. Understanding of the interplay among diet, microbiota, and bone health provides new avenues for tailored interventions aimed at reducing disease risk in osteoporosis and other related disorders. By drawing knowledge from microbiology, metabolism, and bone biology, this review highlights the potential of microbiome-targeted therapies to transform skeletal health and the management of bone diseases.}, }
@article {pmid40475346, year = {2025}, author = {Wang, Z and Wei, X and Piao, L and Zhang, X and Wang, H}, title = {Gut microbiota dysbiosis and metabolic shifts in pediatric norovirus infection: a metagenomic study in Northeast China.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1600470}, pmid = {40475346}, issn = {2235-2988}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology ; China/epidemiology ; *Caliciviridae Infections/microbiology/virology ; *Norovirus ; Metagenomics ; Feces/microbiology ; Male ; Female ; *Gastroenteritis/virology/microbiology ; Child, Preschool ; Child ; Infant ; Bacteria/classification/genetics/isolation &amp; purification ; Longitudinal Studies ; High-Throughput Nucleotide Sequencing ; }, abstract = {BACKGROUND: Norovirus (NoV) is a leading cause of acute gastroenteritis in pediatric populations worldwide. However, the role of gut microbiota in NoV pathogenesis remains poorly understood.<br><br>METHODS: We conducted a longitudinal metagenomic analysis of fecal samples from 12 NoV-infected children and 13 age-matched healthy controls in Northeast China. Microbial composition and functional pathways were assessed using high-throughput shotgun sequencing and bioinformatic profiling.<br><br>RESULTS: NoV infection was associated with significant gut microbial dysbiosis, including increased alpha diversity and distinct taxonomic shifts. Notably, Bacteroides uniformis, Veillonella spp., and Carjivirus communis were enriched in infected individuals. Functional analysis revealed upregulation of metabolic pathways involved in carbohydrate and lipid processing. These microbial and functional alterations persisted over time and correlated with disease severity.<br><br>CONCLUSIONS: Our findings reveal novel associations between NoV infection and gut microbiota dysbiosis, particularly the enrichment of Bacteroides uniformis, which may influence host-pathogen interactions via metabolic or immune mechanisms. The identified microbial and metabolic signatures offer potential biomarkers for diagnosis and targets for microbiota-based therapeutic strategies in pediatric NoV infection.}, }
@article {pmid40473843, year = {2025}, author = {Wu, S and Wang, S and Wu, Z and Chen, M and Chen, X and Lei, D and Peng, C}, title = {Comparative analysis of the clinical characteristic and lung microbiota in adult and elderly patients with pulmonary tuberculosis.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {19777}, pmid = {40473843}, issn = {2045-2322}, support = {2023K146//Quzhou City science and technology plan project/ ; }, mesh = {Humans ; Middle Aged ; Male ; Female ; *Tuberculosis, Pulmonary/microbiology/diagnosis/diagnostic imaging ; Aged ; Adult ; *Lung/microbiology/diagnostic imaging ; *Microbiota/genetics ; Retrospective Studies ; Age Factors ; High-Throughput Nucleotide Sequencing ; Young Adult ; Aged, 80 and over ; }, abstract = {The proportion of elderly people infected with tuberculosis (TB) is increasing, and misdiagnosis and missed diagnosis are common. This study aimed to explore the diagnostic value of metagenomic next-generation sequencing (mNGS) for pulmonary TB (PTB) and to investigate age-related differences in lung microbial composition, clinical characteristics and imaging findings among PTB patients. We retrospectively recruited 162 suspected PTB patients, and finally 143 patients were used in this analysis. Patients were classified into two groups: adult (18 ≤ age < 60, n = 66) and elderly (Age ≥ 60, n = 77). Differences and associations in clinical characteristics, imaging findings, and lung microbiota were analyzed. Compared to adult patients, elderly patients had a higher prevalence of hypertension (31.17% vs. 9.09%, P = 0.0012), fever (20.78% vs. 4.55%, P = 0.0044) and chest tightness (24.68% vs. 10.61%, P = 0.0297), but a lower prevalence of chest pain (7.58% vs. 0%, P = 0.0139). For TB identification, mNGS had the highest positive rate (100%), followed by T-spot (74.75%), GeneXpert (37.80%) and acid-fast staining (AFS) (7.30%), and all the conventional methods showed slight higher positive rates in the elderly group compared to the adult group (P > 0.05). Bilateral lung infection was more common in elderly patients (79.22% vs. 60.61%, P = 0.0148), with infiltration (32.17%, 46/143), shadows (26.57%, 38/143), nodules (20.28%, 29/143), and bronchiectasis (20.28%, 29/143) being the most common imaging features. The diversity of the lung microbial communities was significantly lower in elderly patients compared to adults (P < 0.05). Clinical characteristics, imaging findings, and the top 20 most abundant species in lung microbiota showed significantly positive correlation. This study demonstrates that mNGS has excellent diagnostic value for PTB in both adult and elderly patients. Significant differences in clinical characteristics, imaging, and lung microbial composition were observed between the two groups. Understanding these differences may aid in the diagnosis and treatment of tuberculosis in elderly patients.}, }
@article {pmid40473141, year = {2025}, author = {Luo, Y and Liao, H and Wu, L and Wu, M and Luo, Y and Yao, Y and Ji, W and Gao, L and Xia, X}, title = {Temperature adaptability drives functional diversity and horizontal gene transfer within microbial communities in Daqu solid-state fermentation.}, journal = {Bioresource technology}, volume = {433}, number = {}, pages = {132770}, doi = {10.1016/j.biortech.2025.132770}, pmid = {40473141}, issn = {1873-2976}, mesh = {*Fermentation ; *Gene Transfer, Horizontal/genetics ; *Microbiota/genetics ; *Temperature ; Volatile Organic Compounds ; Bacteria/genetics/metabolism ; Phylogeny ; *Wine/microbiology ; *Adaptation, Physiological ; }, abstract = {The spontaneous solid-state fermentation of high-temperature Daqu (HTD) is a temperature-dependent stacking bioprocessing for enriching microbiota and enzymes to guarantee efficient substrate utilization and fermentation. However, there is a lack of clarity regarding how temperature adaptability affects HTD microbial assembly, domestication direction, and metabolic profile. Here, the flavor substances, microbial assembly, metabolic network, and horizontal gene transfer (HGT) events of three HTDs from Renshu (RS), Jiushang (JS), and Maoyuan (MY) were analyzed. 125 volatile compounds were identified, tetramethylpyrazine, 3-methyl-butanoic acid, phenylethyl alcohol, and trimethylpyrazine were clarified as the typical flavor substances. Bacillus and Kroppenstedtia were the shared dominant bacterial genera. Paecilomyces, Aspergillus, Rasamsonia, and Lichtheimia were dominant fungal genera. Differences in flavor metabolism, microbial structure, and key enzyme metabolism are strongly correlated with sample distance. As proximity decreases, the microbial structural and functional metabolic traits tend to exhibit greater similarity. The frequency of HGT events was analyzed using MetaCHIP, 49, 9 and 69 groups of HGT events occurred in RS, JS, and MY, respectively. HGT events occurred most abundantly in Bacillaceae, and the microbial taxa with a closer phylogenetic relationship possessed the highest incidence of HGT. Specifically, the occurrence of HGT was mainly associated with high-temperature adaptability. It was also linked to characteristic flavor metabolism. Our results revealed the effects of temperature stress on microbial regulation of HTD and adaptive transfer of relevant genes in stacked fermented HTDs. This work provides important insights into HTD quality classification and regulation of solid-state fermentation quality and efficiency through microbial domestication.}, }
@article {pmid40472396, year = {2025}, author = {Zheng, F and Guo, X and Zhang, W and Wang, Y and Hu, E and Guo, X and Su, H and Deng, C}, title = {Insights into the functional characteristics of rhubarb (Rheum officinale Baill) treatment on experimental traumatic brain injury through network pharmacology with metagenomics.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {143}, number = {}, pages = {156853}, doi = {10.1016/j.phymed.2025.156853}, pmid = {40472396}, issn = {1618-095X}, mesh = {Animals ; *Rheum/chemistry ; Male ; *Brain Injuries, Traumatic/drug therapy ; Mice, Inbred C57BL ; Mice ; Metagenomics ; Network Pharmacology ; Gastrointestinal Microbiome/drug effects ; Apoptosis/drug effects ; *Plant Extracts/pharmacology ; Blood-Brain Barrier/drug effects ; Disease Models, Animal ; *Drugs, Chinese Herbal/pharmacology ; Neuroprotective Agents/pharmacology ; }, abstract = {BACKGROUND: Traumatic brain injury (TBI) imposes a heavy burden on society and families owing to its high morbidity and mortality. Rhubarb has been noticed in the Chinese herb for treating TBI. The pharmacological effects include anti-inflammation, anti-bacterial, and purgative. But little is known about its potential mechanism when treating TBI.<br><br>PURPOSE: In this study, we profiled the pharmacological and intestinal functional characteristics of rhubarb in post-TBI mice.<br><br>METHODS: Fifty adult male C57BL/6 mice were randomly allocated into five groups, including sham, controlled cortical impact (CCI), and rhubarb extract administered at low, medium, and high doses. The impaired neurobehavioral function was assessed using the modified neurological severity score (mNSS) and the wire hang test. hematoxylin-eosin (HE) and Nissl staining, terminal deoxynucleotidyl transferase-mediated dUTP-nick-end labeling (TUNEL) and immunoglobulin-&#x3b3; (IgG) staining, immunostaining for GFAP, TNF-&#x3b1; and IL-1&#x3b2; were applied to detect the histological damage, neuronal apoptosis and blood-brain barrier (BBB) permeability, respectively. Subsequently, the network pharmacology approaches was used to identify putative therapeutic targets and the relevant pathway of rhubarb on TBI. In addition, metagenomics and targeted metabolomics revealed the alterations in composition and functions of gut flora and gut-derived serum short-chain fatty acids (SCFAs). Finally, we depleted the gut microbiota with an antibiotic cocktail (ampicillin, metronidazole, neomycin, vancomycin) to uncover the critical role of gut microbiota on rhubarb function.<br><br>RESULTS: Rhubarb reduced brain IgG leakage and neuronal apoptosis after TBI. The network pharmacology analysis identified seven genes as key potential therapeutic targets of rhubarb, and the genes were related to inflammation, oxidant and apoptosis. The enrichment analysis showed that three of the top signal pathways were involved in anti-inflammation, anti-apoptosis and anti-oxidant. The metagenomics analysis showed that rhubarb reshaped the structure and abundance of gut microbiota in TBI. The altered function of gut microbiota was enriched in the improvement of carbohydrate metabolism, gut-derived serum SCFAs and microbial resistance. Finally, gut microbiota depletion confirmed the effects of rhubarb on post-TBI IgG leakage and neuronal apoptosis were depended on gut microbiota.<br><br>CONCLUSIONS: Rhubarb may treat TBI by effects of targeting inflammatory factors and oxidant factors to inhibit neuronal apoptosis and protect the BBB. The therapeutic effects of rhubarb are partly mediated by altering gut microbiota. Our findings not only highlight a holistic and microbial potential of rhubarb's therapeutic functional actions but also elucidate previously unrecognized therapeutic development of novel targets and strategies for TBI therapies by rhubarb.}, }
@article {pmid40468430, year = {2025}, author = {Khoiri, AN and Costa, NR and Crusciol, CAC and Pariz, CM and Costa, C and Calonego, JC and de Castilhos, AM and de Souza, DM and de Lima Meirelles, PR and Cru, IV and Moretti, LG and Bossolani, JW and Kuramae, EE}, title = {Pigeon pea-mediated soil microbial shifts improve agroecosystem multifunctionality in long-term maize-palisade grass intercropping.}, journal = {Environmental microbiome}, volume = {20}, number = {1}, pages = {60}, pmid = {40468430}, issn = {2524-6372}, support = {#2014/21772-4 and #2014/14935-4//S&#xe3;o Paulo Research Foundation (FAPESP)/ ; #458225/2014-2//National Council for Scientific and Technological Development (CNPq)/ ; 1378/14//Funda&#xe7;&#xe3;o Agrisus/ ; }, abstract = {BACKGROUND: Intercropping systems enhance agricultural sustainability by promoting ecosystem multifunctionality (EMF). This study examined the impact of adding pigeon pea (M + PG + PP) into a maize-palisade grass (M + PG) intercropping system under a no-till system (NTS) on soil microbial communities and ecosystem services. After five consecutive growing seasons, bulk soil samples from a soybean-based crop-livestock system were analyzed using metagenomics.<br><br>RESULTS: The inclusion of pigeon pea significantly improved the EMF index, with higher plant productivity and slightly enhanced outcomes in soil health, lamb meat productivity, and climate protection. The M&#x2009;+&#x2009;PG&#x2009;+&#x2009;PP treatment enriched Bradyrhizobium spp., which were positively correlated with soil health, plant productivity, and EMF index. Functional analysis indicated that M&#x2009;+&#x2009;PG&#x2009;+&#x2009;PP treatment enhanced nitrogen metabolism, biofilm formation, and exopolysaccharide (EPS) biosynthesis, improving soil fertility and microbial activity. Similarly, functional analysis of microbial plant growth-promoting traits revealed that the M&#x2009;+&#x2009;PG&#x2009;+&#x2009;PP treatment promoted microbial functions related to nitrogen and iron acquisition, sulfur assimilation, and plant colonization, all essential for plant growth and nutrient cycling. In contrast, the M&#x2009;+&#x2009;PG treatment primarily enhanced pathways related to competitive exclusion and phytohormone production.<br><br>CONCLUSIONS: These findings highlight the importance of incorporating legumes such as pigeon pea into intercropping systems to optimize ecosystem services, enhance soil health, and promote long-term agricultural productivity and sustainability.}, }
@article {pmid40468269, year = {2025}, author = {Li, B and Yang, Y and Xu, B and Song, P and Jiang, F and Gao, H and Cai, Z and Gu, H and Zhang, T}, title = {Comparative macrogenomics reveal plateau adaptation of gut microbiome in cervids.}, journal = {BMC biology}, volume = {23}, number = {1}, pages = {154}, pmid = {40468269}, issn = {1741-7007}, mesh = {*Gastrointestinal Microbiome/genetics ; Animals ; *Deer/microbiology/genetics ; Phylogeny ; Metagenome ; Metagenomics ; *Adaptation, Physiological/genetics ; Energy Metabolism ; Biological Evolution ; }, abstract = {BACKGROUND: Diverse gut microbiota in animals significantly influences host physiology, ecological adaptation, and evolution. However, the specific functional roles of gut microbiota in facilitating host adaptation, as well as the coevolutionary dynamics between microbiota and their hosts, remain largely understudied.<br><br>RESULTS: A total of 41,847 metagenome-assembled genomes and 3193 high-quality species-level genome bins were generated, establishing a comprehensive gut microbiome catalog for cervids in this study. Phylogenetic analysis revealed a coevolutionary relationship between cervids and their gut microbiota. Comparative metagenomic analyses further indicated that the gut microbiota of plateau cervids have undergone genome-level adaptations related to energy metabolism. At the genus level, species-level genome bins from the genera Alistipes and Faecousia in plateau cervids exhibit enhanced energy metabolism capabilities. Structural variations analysis revealed that the insertion and duplications structural variations in the gut microbiota of plateau cervids were significantly enriched in energy metabolism pathways. In contrast, the deletions and contractions in structural variations were predominantly enriched with metabolic pathways involved in the biosynthesis of diverse biochemical molecules.<br><br>CONCLUSIONS: Our study provides a comprehensive gut microbiome catalog of the cervid gut microbiota, revealing the coevolutionary relationship between cervid gut microbiota and hosts. These findings highlight the adaptive genomic evolution of the gut microbiota in contributing to the plateau adaptability of cervids and offer new insights into the mechanisms by which the gut microbiota help hosts adapt to extreme environments.}, }
@article {pmid40468214, year = {2025}, author = {Yang, X and Chen, H and Wu, L and Guo, X and Xue, D}, title = {Diversity and correlation analysis of microbiomes and metabolites of Sphagnum palustre in various microhabitats.}, journal = {BMC plant biology}, volume = {25}, number = {1}, pages = {761}, pmid = {40468214}, issn = {1471-2229}, support = {2019QZKK0304//Second Tibetan Plateau Scientific Expedition/ ; QNTS202201//Youth Innovation Program of CIB/ ; 2022376//Youth Innovation Promotion Association of the Chinese Academy of Sciences/ ; 2021JDTD011//Youth Science and Technology Innovation Team Program of Sichuan Province of China/ ; }, mesh = {*Microbiota ; *Sphagnopsida/microbiology/metabolism ; Ecosystem ; Soil Microbiology ; Bacteria/genetics/metabolism ; }, abstract = {BACKGROUND: Sphagnum peat mosses are crucial contributors to global carbon sequestration and are a dominant presence in many northern peatland environments. These mosses host a wide variety of microorganisms, which reside within their tissues and on their surfaces. Despite this close association, the connection between these microorganisms and the production of metabolites across different parts of Sphagnum remains unclear.<br><br>RESULTS: This research explored the connection between microbial diversity and metabolite production in various microhabitats of Sphagnum palustre by employing metagenomic and metabolomic techniques. Our results indicate that the S. palustre microbiome composition is more strongly influenced by microhabitat than by geographic location. Microbiome diversity microbiomes related to S. palustre showed a steady decrease from soil to near soil, from X to CAP, and from belowground to aboveground habitats. In contrast, network complexity increased. Species abundance analysis indicated that Proteobacteria was the most prevalent bacterial phylum across CAP, S, Z, and X. Additionally, Ascomycota emerged as the predominant fungal phylum. There were significant differences in nitrogen fixation activity, methane oxidation activity, total nitrogen, and total carbon among different microhabitats. The FAPROTAX analysis revealed differences in the metabolic potential of the carbon (C) and nitrogen (N) cycles across the four microhabitats. LC-MS/MS technology was employed to quantitatively assess metabolites across various S. palustre microhabitats. A total of 3,822 metabolites and 353 differential metabolites were detected, predominantly including lipids, organic acids, and carboxylic acids. The majority of these differential metabolites were associated with metabolic pathways such as carotenoid biosynthesis, steroid biosynthesis, secondary bile acid biosynthesis, as well as the biosynthesis of neomycin, kanamycin, and gentamicin. Correlation analysis revealed both positive and negative relationships between microorganisms and differential metabolites. Methylocystis, which was significantly enriched in X and T, showed a strong positive correlation with differential metabolites in S vs T and Z vs X, but a negative correlation with those in X vs T (p&#x2009;<&#x2009;0.05).<br><br>CONCLUSION: In summary, our study demonstrates that Sphagnum palustre microbiomes are primarily influenced by microhabitats rather than specific environmental conditions at different sites. We identified significant variations in microbial community diversity across various S. palustre microhabitats. Correlation analysis revealed links between microorganisms and differential metabolic processes. This comprehensive investigation of aboveground and belowground microbiomes and metabolites in S. palustre provides new insights into the distribution of microbial communities and metabolites across different microhabitats.}, }
@article {pmid40467587, year = {2025}, author = {Xiong, S and Xie, B and Yin, N and Zhu, H and Gao, H and Xu, X and Xiao, K and Cai, X and Sun, G and Sun, X and Cui, Y and Van de Wiele, T and Zhu, Y}, title = {Prenatal exposure to trace elements impacts mother-infant gut microbiome, metabolome and resistome during the first year of life.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {5186}, pmid = {40467587}, issn = {2041-1723}, support = {No. L232076//Natural Science Foundation of Beijing Municipality (Beijing Natural Science Foundation)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/genetics ; Female ; Pregnancy ; Infant ; *Trace Elements/adverse effects ; *Metabolome/drug effects ; Feces/microbiology ; *Prenatal Exposure Delayed Effects/microbiology/metabolism ; Adult ; Male ; Metagenomics ; Hair/chemistry ; *Maternal Exposure/adverse effects ; Infant, Newborn ; Bacteria/genetics/classification/drug effects ; Copper ; }, abstract = {Infancy is a critical window for the colonization of gut microbiome. However, xenobiotic impacts on gut microbiome development in early life remain poorly understood. Here, we recruit 146 mother-infant pairs and collect stool samples at 3, 6, and 12 months after delivery for amplicon sequencing (N = 353), metagenomics (N = 65), and metabolomics (N = 198). Trace elements in maternal hair samples (N = 119) affect diversity and composition of the infant gut microbiome. Shannon diversity in 3 month-old infants is correlated positively with selenium and negatively with copper, and relative abundance of Bifidobacterium increases under high exposure to aluminum and manganese. During the first year of life, infants and their paired mothers have distinct microbial diversity and composition, and their bacterial community structures gradually approach. here are 56 differential metabolites between the first and second visit and 515 differential metabolites between the second and third visit. The typical profile of antibiotic resistance genes (ARGs) significantly differs between infants and their mothers. High levels of copper and arsenic exposure may induce the enrichment of ARGs in the infant gut. Our findings highlight the dynamics of the gut microbiome, metabolites, and ARG profiles of mother-infant pairs after delivery, associated with prenatal exposure to trace elements.}, }
@article {pmid40467244, year = {2025}, author = {Li, S and Rao, C and Zang, X and Yang, Y and Yang, W and Huang, X and Li, J and Sun, J and Liu, Y and Ye, D}, title = {Characterization of aroma active compounds and microbial communities in spontaneously fermented Vitis quinquangularis wines.}, journal = {Food research international (Ottawa, Ont.)}, volume = {214}, number = {}, pages = {116676}, doi = {10.1016/j.foodres.2025.116676}, pmid = {40467244}, issn = {1873-7145}, mesh = {*Wine/analysis/microbiology ; *Fermentation ; *Vitis/microbiology/chemistry ; *Odorants/analysis ; *Volatile Organic Compounds/analysis ; Gas Chromatography-Mass Spectrometry ; *Microbiota ; *Food Microbiology ; }, abstract = {This study comprehensively investigated volatile compounds and microbial communities of spontaneously fermented Vitis quinquangularis wines from the Guangxi production regions. The aroma profiles of V. quinquangularis wines were analyzed by GC-O-MS, GC-QQQ-MS/MS, and quantitative descriptive analysis. The wines exhibit predominantly fruity and floral notes, with contributions from esters and (E)-β-damascenone. A distinctive and typical "green and earthy" aroma was observed, with contributions from C6 compounds and volatile phenols such as 1-hexanol, (E)-3-hexen-1-ol, hexanoic acid, 4-vinylguaiacol, eugenol, and isoeugenol. Metagenomics and culturomics analyses indicated that the dominant strains involved in the spontaneous fermentation process were Hanseniaspora opuntiae, Saccharomyces cerevisiae, Paenibacillus sp., Sphingomonas sp., and Bacillus sp. Additionally, microorganisms from sixteen generas, including Actinomycetospora and Ameyamaea, etc., along with six enzymes like EC 1.1.1.1 and EC 1.1.1.318, etc., were implicated in the production of the "green and earthy" aroma in V. quinquangularis wines.}, }
@article {pmid40467108, year = {2025}, author = {Ghensi, P and Heidrich, V and Bazzani, D and Asnicar, F and Armanini, F and Bertelle, A and Dell'Acqua, F and Dellasega, E and Waldner, R and Vicentini, D and Bolzan, M and Trevisiol, L and Tomasi, C and Pasolli, E and Segata, N}, title = {Shotgun Metagenomics Identifies in a Cross-Sectional Setting Improved Plaque Microbiome Biomarkers for Peri-Implant Diseases.}, journal = {Journal of clinical periodontology}, volume = {52}, number = {7}, pages = {999-1010}, pmid = {40467108}, issn = {1600-051X}, support = {//Italian Society of Periodontology and Implantology (SIdP)/ ; //Eklund Foundation/ ; //International Team for Implantology (ITI)/ ; //CLC Scientific S.r.l./ ; //PreBiomics S.r.l./ ; /ERC_/European Research Council/International ; }, mesh = {Humans ; *Peri-Implantitis/microbiology/diagnosis ; *Dental Plaque/microbiology ; *Metagenomics/methods ; Male ; Cross-Sectional Studies ; Female ; *Microbiota/genetics ; Middle Aged ; Biomarkers/analysis ; *Dental Implants/microbiology ; Aged ; Adult ; Machine Learning ; Mucositis/microbiology ; Stomatitis/microbiology ; }, abstract = {AIM: This observational study aimed to verify and improve the predictive value of plaque microbiome of patients with dental implant for peri-implant diseases.<br><br>MATERIALS AND METHODS: Patients were included in one of the following study groups according to the health status of their dental implants: (a) healthy, (b) affected by mucositis and (c) affected by peri-implantitis. From each patient, submucosal plaque microbiome samples were collected from the considered dental implant and from a contralateral healthy implant/tooth. After shotgun metagenomic sequencing, the plaque microbiome was profiled taxonomically and functionally with MetaPhlAn 4 and HUMAnN 3, respectively. Taxonomic and functional profiles were fed into machine-learning models, which were then evaluated with cross-validation to assess the extent to which the plaque microbiome could be used to pinpoint peri-implant diseases.<br><br>RESULTS: Shotgun metagenomics sequencing was performed for a total of 158 samples spanning 102 individuals. Four-hundred and forty-seven prokaryotic species were identified as part of the peri-implant microbiome, 34% of which were currently uncharacterized species. At the community level, the peri-implant microbiome differed according to the health status of the implant (p&#x2009;&#x2264;&#x2009;0.006 for all pairwise comparisons) but this was site-specific, as healthy contralateral sites showed no discriminating microbiome features. Peri-implantitis microbiomes further showed lower inter-subject variability than healthy plaque microbiomes (p&#x2009;<&#x2009;0.001), while mucositis-associated microbiomes were in the middle of the continuum between health and peri-implantitis. Each health condition was associated with a strong signature of taxonomic and functional microbiome biomarkers (log10 LDA score &#x2265;&#x2009;2.5), 30% and 13% of which represented uncharacterized microbial functions and unknown species, respectively. Distinct Fusobacterium nucleatum clades were associated with implant status, highlighting the subspecies F. nucleatum's functional and phenotypic diversity. Machine-learning models trained on taxonomic or functional plaque microbiome profiles were highly accurate in differentiating clinical groups (AUC&#x2009;=&#x2009;0.78-0.96) and highlighted the extent to which the peri-implant microbiome is associated with peri-implant clinical parameters (AUC&#x2009;=&#x2009;0.79-0.87).<br><br>CONCLUSIONS: Plaque microbiome profiling with shotgun metagenomics revealed consistent associations between microbiome composition and peri-implant diseases. In addition to pointing to peri-implant-associated microbes, warranting further mechanistic studies, we showed high-resolution plaque microbiome evaluation via metagenomics as an effective tool. Its utility within protocols for clinical management of peri-implant diseases should be explored in the future.}, }
@article {pmid40467000, year = {2025}, author = {Potrykus, M and Kurpas, M and Gałęzowska, G and Gajewska, M}, title = {Linking chemical contamination to composition of bacterial communities in urban beach sands of a brackish sea under anthropogenic pressure.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {381}, number = {}, pages = {126596}, doi = {10.1016/j.envpol.2025.126596}, pmid = {40467000}, issn = {1873-6424}, abstract = {The water quality on recreational beaches is constantly monitored. However, given that beachgoers often spend more time in contact with the sand than the seawater, it is essential to also regularly assess beach sand quality. In this study, 34 beach sand samples were collected in seven locations along the south shore of the Baltic Sea (Europe) between 2022 and 2023. The samples were obtained from recreational beaches with significant anthropogenic pressure. Since the use of new chemicals is widespread, it is imperative to not only monitor known contaminants but also to actively search for the presence of new ones in the environment. In order to establish the connection between the bacterial biodiversity and their possible resilience in the contaminated marine environment, the bacterial abundances in the beach sand were compared based on 16S rDNA sequencing with chemical contamination examined with non-targeted GC-MS. One hundred forty-nine (149) distinct chemicals were detected, many of which are of human health concern. The presence of polycyclic aromatic hydrocarbons, plasticizers and benzothiazoles in the sand samples was observed, and these contaminants were found to be associated with alterations in the bacterial community structure, characterized by a decrease or increase in certain taxonomic groups. Notably, the bacterial communities exhibited specificity to each location and demonstrated stability throughout the seasons. Furthermore, the presence of DNA from 31 potential human pathogens was detected in the sand. These findings emphasize the necessity for regular monitoring of beach sand for the presence of toxic chemicals and pathogens to safeguard public health and the environment.}, }
@article {pmid40465720, year = {2025}, author = {de Porto, AP and Dylla, NP and Stutz, M and Lin, H and Khalid, M and Mullowney, MW and Little, J and Rose, A and Moran, D and McMillin, M and Burgo, V and Smith, R and Woodson, C and Metcalfe, C and Ramaswamy, R and Lehmann, C and Odenwald, M and Bandealy, N and Zhao, J and Kim, M and Adler, E and Sundararajan, A and Sidebottom, A and Kress, JP and Wolfe, KS and Pamer, EG and Patel, BK}, title = {Fecal metabolite profiling identifies critically ill patients with increased 30-day mortality.}, journal = {Science advances}, volume = {11}, number = {23}, pages = {eadt1466}, pmid = {40465720}, issn = {2375-2548}, mesh = {Humans ; *Critical Illness/mortality ; *Feces/microbiology/chemistry ; Male ; Female ; Middle Aged ; *Gastrointestinal Microbiome ; Aged ; Intensive Care Units ; *Metabolome ; Dysbiosis/mortality/microbiology ; Metabolomics/methods ; Prospective Studies ; }, abstract = {Critically ill patients admitted to the medical intensive care unit (MICU) have reduced intestinal microbiota diversity and altered microbiome-associated metabolite concentrations. Metabolites produced by the gut microbiota have been associated with survival of patients receiving complex medical treatments and thus might represent a treatable trait to improve clinical outcomes. We prospectively collected fecal specimens, defined microbiome compositions by shotgun metagenomic sequencing, and quantified microbiota-derived fecal metabolites by mass spectrometry from 196 critically ill patients admitted to the MICU for non-COVID-19 respiratory failure or shock to correlate microbiota features and metabolites with 30-day mortality. Microbiota compositions of the first fecal sample after MICU admission did not independently associate with 30-day mortality. We developed a metabolic dysbiosis score (MDS) that uses fecal concentrations of 13 microbiota-derived metabolites, which predicted 30-day mortality independent of known confounders. The MDS complements existing tools to identify patients at high risk of mortality by incorporating potentially modifiable, microbiome-related, independent contributors to host resilience.}, }
@article {pmid40465264, year = {2025}, author = {Liu, M and Geng, J and Jin, S and Hu, P and Wang, X and Liu, X}, title = {Alterations of the Enteric Virome in Vogt-Koyanagi-Harada Disease.}, journal = {Investigative ophthalmology &amp; visual science}, volume = {66}, number = {6}, pages = {15}, pmid = {40465264}, issn = {1552-5783}, mesh = {Humans ; *Uveomeningoencephalitic Syndrome/virology/microbiology ; Male ; Female ; *Virome/genetics ; Adult ; Case-Control Studies ; RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome ; Middle Aged ; Bacteria/genetics ; Metagenomics ; Young Adult ; }, abstract = {PURPOSE: This study aims to explore the enteric virome characteristics of Vogt Koyanagi Harada (VKH) disease and its potential role in this disease.<br><br>METHODS: Shotgun metagenomic sequencing was used to detect the enteric virome and 16S rRNA to detect the bacteriome in new-onset, untreated patients with VKH (n = 25) and age- and sex-matched healthy controls without autoimmune diseases (n = 25).<br><br>RESULTS: Patients with VKH exhibited different enteric viral communities from healthy controls, characterized by decreased richness of core viral communities (present in > 80% of samples) and increased richness of common viral communities (present in 50%-80% of samples). Notably, within the core virus community, bacteriophage richness was markedly reduced, whereas eukaryotic virus richness significantly increased in patients with VKH. The case-control analysis identified 42 differentially abundant viruses, including a decrease in crAss-like phages, the eukaryotic virus Moumouvirus_moumou, and an enrichment of the Chlamydiamicrovirus_CPG1. Most of the differential phages predominantly targeted bacteria from the phyla Pseudomonadota and Firmicutes. The gut virome-bacteria community correlation analysis revealed a shift in the interactions between the core viruses and bacterial communities. Additionally, Wroclawvirus PA5oct (a Pseudomonas phage) correlated with leukotrichia, a clinically relevant symptom of VKH (P = 0.042). The impact of multiple Pseudomonas phages on the host folate biosynthesis was significantly enhanced in patients with VKH. Moreover, the protein (Earp361-372) encoded by VKH-enriched Pseudomonas was identified to share homology with the melanin antigen gp10044-59.<br><br>CONCLUSIONS: The gut virome of patients with VKH differs significantly from healthy controls, suggesting its disturbance may contribute to gut microbiome imbalance and VKH development.}, }
@article {pmid40463374, year = {2025}, author = {Gu, J and Ma, Y and Chang, Q and Chen, L}, title = {Influence of programmed death ligand 1 (PD-L1) knockout on gut microbiota in experimental autoimmune uveitis.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1600673}, pmid = {40463374}, issn = {1664-3224}, mesh = {Animals ; *Gastrointestinal Microbiome/immunology ; *Uveitis/immunology/microbiology/genetics ; *B7-H1 Antigen/genetics/deficiency ; *Autoimmune Diseases/immunology/microbiology/genetics ; Mice, Knockout ; Mice ; Female ; Disease Models, Animal ; Mice, Inbred C57BL ; }, abstract = {PURPOSE: Programmed death ligand 1 (PD-L1) is a potential target for autoimmune disease therapies. The gut microbiota plays a critical role in autoimmunity, and may influence therapeutic outcomes of immune therapies in cancer. However, the relationship between PD-L1 and gut microbiota in autoimmune conditions remains unclear. This study aims to investigate the effect of PD-L1 knockout on gut microbiota in an experimental autoimmune uveitis (EAU) model.<br><br>METHODS: EAU was induced via immunization with interphotoreceptor retinoid-binding protein peptide 651-670 (IRBP651-670) in either wild type (WT) or PD-L1 knockout (KO) C57BL/6J female mice. Sham adjuvant was administered to WT or PD-L1 KO mice as healthy controls. The severity of EAU was evaluated through clinical evaluation and histopathological gradings. The characteristics of gut microbiota was analyzed using metagenomic sequencing.<br><br>RESULTS: Each group consisted of three biological replicates. The clinical and histopathological scores of EAU were significantly higher in KO_EAU mice than in WT_EAU mice. WT_EAU mice exhibited lower microbial richness than their healthy controls (WT mice), while PD-L1 KO in EAU mice (KO_EAU group) led to increased richness when compared to wild type EAU mice (WT_EAU group). EAU induced a reduction in the abundance of Akkermansia muciniphila A and an increased in CAG-485 sp002362485. PD-L1 knockout in EAU led to an increased abundance of families Bacteroidaceae, Lachnospiraceae and Ruminococcaceae. EAU was associated with declining microbial tryptophan metabolism and up-regulated functions related to lipid and carbohydrate metabolism; PD-L1 knockout in EAU further increased the metabolism of glycan and biosynthesis of 3-deoxy-&#x3b1;-D-manno-2-octulosonate (Kdo), a key component of bacterial lipopolysaccharide (LPS).<br><br>CONCLUSION: Both EAU and PD-L1 knockout modulate gut microbiota, affecting microbial composition - particularly Akkermansia, CAG-485, Bacteroidaceae, Lachnospiraceae and Ruminococcaceae - and microbial functions such as lipid, carbohydrate and glycan metabolism.}, }
@article {pmid40462511, year = {2025}, author = {Qian, LM and Wang, SX and Zhou, W and Qin, ZX and Wang, YN and Zhao, Q and Xu, RH}, title = {Individualized metagenomic network model for colorectal cancer diagnosis: insights into viral regulation of gut microecology.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {3}, pages = {}, pmid = {40462511}, issn = {1477-4054}, support = {Y-HR2020QN-0474//Beijing Xisike Clinical Oncology Research Foundation/ ; 84000-31630002//Sun Yat-sen University clinical research 5010 program/ ; CIRP-SYSUCC-0004//Cancer Innovative Research Program of Sun Yat-sen University Cancer Center/ ; 2019-I2M-5-036//CAMS Innovation Fund for Medical Sciences (CIFMS)/ ; 82173128//National Natural Science Foundation of China/ ; 81930065//National Natural Science Foundation of China/ ; 82321003//National Natural Science Foundation of China/ ; }, mesh = {*Colorectal Neoplasms/diagnosis/virology/microbiology/genetics ; Humans ; *Gastrointestinal Microbiome ; *Metagenomics/methods ; *Metagenome ; Dysbiosis/virology ; }, abstract = {The role of gut microbiota, especially viruses, in colorectal cancer (CRC) pathogenesis remains unclear. This study investigated the interplay between gut microbiota and CRC development. We developed a viral/bacterial sequence analysis pipeline to reanalyze gut metagenomic datasets from eight CRC studies. A multisample co-occurrence network was constructed to delineate microbiota species interconnections. Our analysis confirmed dysbiosis in CRC patients and revealed enrichment of viral species, particularly those hosted by Lactococcus and Escherichia. These viruses were identified as central hubs in the multikingdom interaction network. We developed a network-based model using single sample networks (SSN) that distinguished CRC patients from controls with an area under the curve (AUC) of 0.93. Models combining relative abundance and SSN assessment achieved an AUC of 0.97, outperforming SSN-based models without viral data. This study highlights the crucial role of viruses in the gut microbiome network and their potential as targets for CRC prevention and intervention. Our approach offers a new perspective on noninvasive diagnostic criteria for CRC.}, }
@article {pmid40462165, year = {2025}, author = {Gao, H and Bai, H and Su, Y and Gao, Y and Fang, H and Li, D and Yu, Y and Lu, X and Xia, D and Mao, D and Luo, Y}, title = {Fecal microbiota transplantation from Helicobacter pylori carriers following bismuth quadruple therapy exacerbates alcohol-related liver disease in mice via LPS-induced activation of hepatic TLR4/NF-κB/NLRP3 signaling.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {627}, pmid = {40462165}, issn = {1479-5876}, support = {42377426//National Natural Science Foundation of China/ ; 42077382//National Natural Science Foundation of China/ ; 21JCYBJC01200//Tianjin Municipal Natural Science Foundation/ ; 2023220//Research Project on Integrated Traditional Chinese and Western Medicine of Tianjin Municipal Health Commission/ ; }, mesh = {Animals ; *Fecal Microbiota Transplantation/adverse effects ; *NLR Family, Pyrin Domain-Containing 3 Protein/metabolism ; *Helicobacter pylori/physiology/drug effects ; *Signal Transduction/drug effects ; Lipopolysaccharides/pharmacology ; *Bismuth/therapeutic use/pharmacology ; *Toll-Like Receptor 4/metabolism ; Gastrointestinal Microbiome/drug effects ; *NF-kappa B/metabolism ; *Liver/pathology/metabolism/drug effects ; *Liver Diseases, Alcoholic/microbiology/therapy/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Helicobacter Infections/microbiology ; Disease Models, Animal ; Humans ; Dysbiosis ; }, abstract = {BACKGROUND: Helicobacter pylori infection is common in patients with alcohol-related liver disease (ALD), and bismuth quadruple therapy (BQT) is widely used for eradication. However, its impact on ALD remains unclear. This study aims to characterize BQT-induced gut microbiota alterations in asymptomatic H. pylori carriers and evaluate their effect on an ALD mouse model.<br><br>METHODS: Metagenomic sequencing was conducted to assess the gut microbiota composition of individuals before and after BQT. Fecal microbiota transplantation (FMT) from these donors was performed in an ALD mouse model. Gut microbiota in mice was analyzed by 16S rRNA sequencing. Liver and intestinal parameters were assessed using western blot, RT-qPCR, histopathology, ELISA, and flow cytometry.<br><br>RESULTS: BQT treatment significantly altered the gut microbiota in H. pylori carriers, increasing the abundance of opportunistic pathogens, including Klebsiella pneumoniae, Escherichia coli, Klebsiella quasipneumoniae, and Klebsiella variicola, while decreasing beneficial bacteria such as Bifidobacterium, Eubacterium, Bacteroides, Faecalibacterium, and Blautia. In ALD mice receiving FMT from post-BQT donors, exacerbated gut dysbiosis was observed, marked by an enrichment of Enterobacteriaceae and Escherichia-Shigella. These microbiota changes were associated with impairment of intestinal barrier integrity, as evidenced by reduced levels of mucins, tight junction proteins, and antimicrobial peptides, along with a decrease in Treg cells and an increase in Th17 and Th1 cells. Additionally, this dysbiosis led to elevated serum lipopolysaccharide (LPS) levels, which activated the hepatic NLRP3 inflammasome pathway and subsequently increased IL-18 and IL-1&#x3b2; levels. Furthermore, liver function and oxidative stress markers, including ALT, AST, MDA, GSSG/GSH ratio, and SOD, were significantly elevated, indicating severe liver dysfunction and increased oxidative stress. Finally, probiotic supplementation effectively mitigated the negative effects of BQT-induced gut microbiota remodeling on ALD in mice.<br><br>CONCLUSIONS: BQT markedly alters the gut microbiota in H. pylori carriers, promoting dysbiosis that exacerbates ALD in mice via LPS-mediated activation of hepatic inflammatory pathways. These findings highlight the need for careful consideration of BQT use in ALD patients.}, }
@article {pmid40462041, year = {2025}, author = {Luo, Y and Wu, R and Wu, W and Zhao, D and Jiang, Y and Gu, H}, title = {Differences in pulmonary microbiota of severe community-acquired pneumonia with different pathogenic microorganisms in children.}, journal = {BMC pediatrics}, volume = {25}, number = {1}, pages = {449}, pmid = {40462041}, issn = {1471-2431}, support = {82200008//the Youth Program of National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Community-Acquired Infections/microbiology ; Male ; Female ; Child, Preschool ; Haemophilus influenzae/isolation &amp; purification ; Infant ; Bronchoalveolar Lavage Fluid/microbiology ; *Microbiota ; *Lung/microbiology ; Streptococcus pneumoniae/isolation &amp; purification ; Mycoplasma pneumoniae/isolation &amp; purification ; *Pneumonia, Bacterial/microbiology ; Child ; Severity of Illness Index ; Pneumonia, Mycoplasma/microbiology ; C-Reactive Protein/analysis ; Community-Acquired Pneumonia ; }, abstract = {BACKGROUND: Community-acquired pneumonia (CAP) is the leading cause of hospitalization and death in children under 5 years old. Recently, the number of children with severe CAP (SCAP) has increased significantly, and local or systemic complications may occur. However, changes in the pulmonary microbiota of SCAP with different pathogens and their relationship with the clinical features of SCAP remain unclear.<br><br>METHODS: This study collected bronchoalveolar lavage fluid (BALF) from 105 children with SCAP for metagenomics next generation sequencing (mNGS). According to the first pathogen of mNGS, the enrolled children were divided into the Streptococcus pneumoniae (SP), Mycoplasma pneumoniae (MP) and Haemophilus influenzae (HI) groups. We aimed to explore differences in clinical features and pulmonary microbiota of SCAP with different pathogens, and clarify the correlation between pulmonary microbiota and clinical features.<br><br>RESULTS: Fever days and the levels of C-reactive protein (CRP), procalcitonin (PCT), lactate dehydrogenase (LDH), D-dimer and heparin-binding protein (HBP) of children in MP group were significantly higher than those in HI group. The level of LDH of children in MP group was significantly higher than that in SP group. The abundance of MP was also positively correlated with fever days and the levels of PCT, LDH and D-dimer. The &#x3b1; diversity of SP group was significantly increased compared to MP group and HI group.<br><br>CONCLUSION: Compared to SP-infected and HI-infected children with SCAP, children with SCAP infected with MP tend to have a more intense inflammatory response. The &#x3b1; diversity was higher in the lower airways of children with SCAP and SP infections compared to MP-infected and HI-infected children with SCAP.}, }
@article {pmid40460542, year = {2025}, author = {Smirnova, AV and Verbeke, TJ and Furgason, CC and Albakistani, EA and Nwosu, FC and Kim, JJ and Haupt, ES and Sheremet, A and Lee, ES and Trang, E and Richardson, E and Dacks, JB and Dunfield, PF}, title = {Microbial community development in an oil sands pit lake.}, journal = {The Science of the total environment}, volume = {987}, number = {}, pages = {179764}, doi = {10.1016/j.scitotenv.2025.179764}, pmid = {40460542}, issn = {1879-1026}, mesh = {*Lakes/microbiology ; *Microbiota ; *Oil and Gas Fields ; Mining ; *Environmental Monitoring ; RNA, Ribosomal, 16S/analysis ; *Water Microbiology ; Canada ; Bacteria ; }, abstract = {Surface mining and extraction of oil sands in Canada produces fluid tailings that contain several compounds of concern for the environment. One option for mine reclamation is the construction of Pit Lakes (PLs) to contain and remediate these tailings. Ultimately, PLs should support food webs typical of boreal lakes. From 2015 to 2021, we applied 16S/18S rRNA gene amplicon sequencing and metagenomics to monitor prokaryotic and eukaryotic microbes in the only full-scale PL of the oil sands industry (Base Mine Lake or BML), and compared it to two control environments: a freshwater reservoir unaffected by tailings, and active tailings ponds receiving regular industrial input. Microbial communities in BML were always intermediate to the two control environments based on alpha and beta diversity analyses. BML communities were highly variable with year, season, and water depth, and contained fewer core species than the freshwater reservoir. Several hydrocarbon degraders and sulfur cycling bacteria were identified as indicator species of tailings ponds, while several phototrophs were indicative of freshwater. However, all of these species were abundant in BML, suggesting that the PL supports food webs characteristic of each control environment. Over the 6-year study, the relative abundances of some common freshwater phytoplankton (Cryptomonas, Mychonastes, Trebouxiophyceae, Cyanobium) and heterotrophic bacteria (Sporichthyaceae, Ca. Fonsibacter, Ilumatobacteraceae, Microbacteriaceae, Ca. Planktophila) increased in BML. The results suggest that microbial communities and processes in BML represent an intermediate state between a tailings pond and a natural freshwater system, and did not stabilize within 10 years of its creation.}, }
@article {pmid40460541, year = {2025}, author = {Kang, MG and Kwak, MJ and Kang, A and Park, J and Lee, DJ and Mun, J and Kim, S and Mun, D and Lee, W and Choi, H and Seo, E and Choi, Y and Jeong, KC and Oh, S and Kim, J and Kim, Y}, title = {Metagenome-based microbial metabolic strategies to mitigate ruminal methane emissions using Komagataeibacter-based symbiotics.}, journal = {The Science of the total environment}, volume = {987}, number = {}, pages = {179793}, doi = {10.1016/j.scitotenv.2025.179793}, pmid = {40460541}, issn = {1879-1026}, mesh = {Animals ; *Methane/metabolism ; *Rumen/microbiology/metabolism ; *Metagenome ; Cattle ; Symbiosis ; Fermentation ; *Gastrointestinal Microbiome ; }, abstract = {Global warming increasingly threatens organisms in equatorial regions, where temperatures often exceed physiological limits. Rumen methanogens are a major biological source of anthropogenic methane, a potent greenhouse gas. Therefore, ruminal methane mitigation strategies that preserve animal productivity are urgently needed. Our In vitro analysis of Holstein steer rumen fluid-integrating gas production, volatile fatty acid (VFA) profiles, and metagenomic data-demonstrated that kombucha, a fermented beverage, effectively reduces methane emissions by modulating ruminal fermentation. Rumen fluid was incubated for 60 h under three treatments (control, 3-NOP, and kombucha). During the initial 30 h, kombucha reduced methane by 15.07 % compared to the control but was 17.54 % higher than 3-NOP. In the subsequent 30 h, kombucha achieved sustained reductions of 34.72 % versus the control and 26.28 % versus 3-NOP, highlighting its uniquely sustained methane-reducing effect. A metagenomics-guided screening and in vitro validation identified Komagataeibacter intermedius SLAM-NK6B as a key strain underlying the methane-reducing effect of kombucha. The genome of SLAM-NK6B encodes biosynthetic gene clusters for cellulose, malate, citrate, and methanobactin-metabolites that can modulate the rumen microbiota. SLAM-NK6B supplementation reduced methanogen abundance by 53.32 % and increased hydrogen pressure, shifting microbial metabolism. Excluding acetate, VFA production increased significantly, with propionate levels elevated by 15.39-43.81 %. Metagenomic data further indicated activation of alternative hydrogen sink pathways, including citrate-to-propionate and malate-to-propionate conversions. This study proposes a novel microbial metabolic strategy for methane mitigation, enabling both methane reduction and enhanced fermentation efficiency. Such metabolic guidance of the rumen microbiome offers a sustainable approach to low-emission ruminant production.}, }
@article {pmid40459709, year = {2025}, author = {Quoc, NB and Nhu, LTT and Chau, NNB}, title = {Identification of diet resources of big-eyed bug Geocoris ochropterus (Fieber) (Hemiptera: Geocoridae) by multiplex PCR and shotgun metagenomic approaches.}, journal = {Molecular biology reports}, volume = {52}, number = {1}, pages = {537}, pmid = {40459709}, issn = {1573-4978}, support = {E2022.02.1//&#x110;&#x1ea1;i h&#x1ecd;c M&#x1edf; Th&#xe0;nh ph&#x1ed1; H&#x1ed3; Ch&#xed; Minh/ ; }, mesh = {Animals ; *Metagenomics/methods ; Multiplex Polymerase Chain Reaction/methods ; *Hemiptera/genetics ; Diet ; Gastrointestinal Microbiome/genetics ; Metagenome/genetics ; }, abstract = {BACKGROUND: Big-eyed bugs (Geocoris spp.) are important generalist predators in agricultural ecosystems, playing a crucial role in natural pest control.<br><br>METHODS: To better understand their dietary sources, we assessed the plant and animal food sources in the gut of Geocoris ochropterus using multiplex PCR and shotgun metagenomic analysis. The PCR assays targeted genetic markers from both animal (COI) and plant (matK and rbcL) DNA.<br><br>RESULTS: Results revealed the presence of both animal and plant-derived DNA in the gut samples, indicating that Geocoris ochropterus feeds on a mixed diet. Additionally, the results of shotgun metagenomic sequencing of the gut microbiota showed a predominance of Eukaryota, with over 80% of sequences belonging to this domain, while a diverse range of taxonomic groups were identified, including arthropods, plants, bacteria, and fungi. Arthropods particularly insects from the orders Lepidoptera, Hemiptera, Hymenoptera, Coleoptera, Phasmatodea and plants belonging to the orders Brassicales, Cucurbitales, and Poales constituted the most abundant dietary components. At the genus level, notable taxa included Maniola (family Nymphalidae), Carposina (Carposinidae), Helicoverpa (Noctuidae), and Solanum (Solanaceae). Species-level analysis confirmed the dominance of several insect species, including Maniola hyperanthus, Carposina sasakii, and Bombyx mori, alongside plant species such as Cucumis melo, Gossypium hirsutum, and Digitaria exilis.<br><br>CONCLUSIONS: These findings provide a comprehensive characterization of the diet of Geocoris ochropterus, highlighting its role as a generalist predator with a diverse diet consisting of both insect and plant food sources. This study contributes to the understanding of Geocoris ochropterus as a potential biocontrol agent in agricultural systems.}, }
@article {pmid40456950, year = {2025}, author = {Kocharovskaya, Y and Delegan, Y and Sevostianov, S and Bogun, A and Demin, DV}, title = {Metagenomic Analysis of Pulp and Paper Wastes and Prospects for Their Self-purification.}, journal = {Current microbiology}, volume = {82}, number = {7}, pages = {320}, pmid = {40456950}, issn = {1432-0991}, mesh = {*Paper ; *Metagenomics ; Lignin/metabolism ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Industrial Waste/analysis ; Biodegradation, Environmental ; *Microbiota ; High-Throughput Nucleotide Sequencing ; }, abstract = {Thousands of tons of waste accumulate, as a result of the activities of the pulp and paper industry, which is often stored in the form of dumps. However, intensifying the use of lignocellulose for more efficient bioremediation remains highly challenging. Therefore, the study of microbiomes with potentially desirable characteristics for the decomposition of pulp and paper wastes is currently an important task. In this study, a comprehensive assessment of the microbiota biodiversity of these dumps was carried out using high-throughput, high-resolution sequencing. In study 472 million high-quality clean reads assembled into 6,413,337 contigs with a total length of 4306 Mb, of which 3,633,174 open reading frames (ORFs) were identified. The core microbiome was composed of four phyla from Proteobacteria, Actinobacteria, Bacteroidetes, and Verrucomicrobia. Representatives of phylum Proteobacteria prevailed in samples. Annotation using the KEGG database in the Metabolism category resulted in 654,234 ORFs and 5138 ORFs encoding enzymes/proteins involved in degradation of lignocellulose which formed main pool of the wastes. By use of the created database, the search for lignocellulose degradation genes showed that genera Shewanella, Achromobacter, and Delftia covered significant part of the reads. The results indicate that the established microbiome of local landfills can be considered as an important source for improving lignocellulose bioremediation, provided that lignocellulosic fungi are sufficiently active. In whole, these new data can be used as a scientific basis to form an efficient eco-biotechnology for auto-remediation of pulp and paper industry waste.}, }
@article {pmid40456770, year = {2025}, author = {Zhou, XQ and Chen, KH and Yu, RQ and Yang, M and Liu, Q and Hao, YY and Li, J and Liu, HW and Feng, J and Tan, W and Huang, Q and Gu, B and Liu, YR}, title = {Microbial potential to mitigate neurotoxic methylmercury accumulation in farmlands and rice.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {5102}, pmid = {40456770}, issn = {2041-1723}, support = {42425701//National Natural Science Foundation of China (National Science Foundation of China)/ ; 42177022//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Methylmercury Compounds/metabolism/toxicity ; *Oryza/metabolism/microbiology ; *Soil Microbiology ; Biodegradation, Environmental ; Metagenomics ; *Soil Pollutants/metabolism/toxicity ; *Bacteria/metabolism/genetics/classification ; Soil/chemistry ; }, abstract = {Toxic methylmercury (CH3Hg[+]) is produced by microbial conversion of inorganic mercury in hypoxic environments such as rice paddy soils, and can accumulate in rice grains. Although microbial demethylation has been recognized as a crucial pathway for CH3Hg[+] degradation, the identities of microbes and pathways accountable for CH3Hg[+] degradation in soil remain elusive. Here, we combine [13]CH3Hg[+]-DNA stable-isotope probing experiments with shotgun metagenomics to explore microbial taxa and associated biochemical processes involved in CH3Hg[+] degradation in paddy and upland soils. We identify Pseudarthrobacter, Methylophilaceae (MM2), and Dechloromonas as the most significant taxa potentially engaged in the degradation of [13]CH3Hg[+] in paddy soil with high mercury contamination. We confirm that strains affiliated with two of those taxa (species Dechloromonas denitrificans and Methylovorus menthalis) can degrade CH3Hg[+] in pure culture assays. Metagenomic analysis further reveals that most of these candidate [13]CH3Hg[+] degraders carry genes associated with the Wood-Ljungdahl pathway, dicarboxylate-hydroxybutyrate cycle, methanogenesis, and denitrification, but apparently lack the merB and merA genes involved in CH3Hg[+] reductive demethylation. Finally, we estimate that microbial degradation of soil CH3Hg[+] contributes to 0.08-0.64 fold decreases in CH3Hg[+] accumulation in rice grains across China (hazard quotient (HQ) decrements of 0.62-13.75%). Thus, our results provide insights into microorganisms and pathways responsible for CH3Hg[+] degradation in soil, with potential implications for development of bioremediation strategies.}, }
@article {pmid40454480, year = {2025}, author = {Lynch, LE and Lahowetz, R and Maresso, C and Terwilliger, A and Pizzini, J and Melendez Hebib, V and Britton, RA and Maresso, AW and Preidis, GA}, title = {Present and future of microbiome-targeting therapeutics.}, journal = {The Journal of clinical investigation}, volume = {135}, number = {11}, pages = {}, pmid = {40454480}, issn = {1558-8238}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Probiotics/therapeutic use ; *Phage Therapy/trends/methods ; Bacteriophages ; Animals ; }, abstract = {A large body of evidence suggests that single- and multiple-strain probiotics and synbiotics could have roles in the management of specific gastrointestinal disorders. However, ongoing concerns regarding the quality and heterogeneity of the clinical data, safety in vulnerable populations, and the lack of regulation of products containing live microbes are barriers to widespread clinical use. Safety and regulatory issues must be addressed and new technologies considered. One alternative future strategy is the use of synthetic bacterial communities, defined as manually assembled consortia of two or more bacteria originally derived from the human gastrointestinal tract. Synthetic bacterial communities can model functional, ecological, and structural aspects of native communities within the gastrointestinal tract, occupying varying nutritional niches and providing the host with a stable, robust, and diverse gut microbiota that can prevent pathobiont colonization by way of colonization resistance. Alternatively, phage therapy is the use of lytic phage to treat bacterial infections. The rise of antimicrobial resistance has led to renewed interest in phage therapy, and the high specificity of phages for their hosts has spurred interest in using phage-based approaches to precisely modulate the microbiome. In this Review, we consider the present and future of microbiome-targeting therapies, with a special focus on early-life applications, such as prevention of necrotizing enterocolitis.}, }
@article {pmid40452057, year = {2025}, author = {Francioli, D and Kampouris, ID and Kuhl-Nagel, T and Babin, D and Sommermann, L and Behr, JH and Chowdhury, SP and Zrenner, R and Moradtalab, N and Schloter, M and Geistlinger, J and Ludewig, U and Neumann, G and Smalla, K and Grosch, R}, title = {Microbial inoculants modulate the rhizosphere microbiome, alleviate plant stress responses, and enhance maize growth at field scale.}, journal = {Genome biology}, volume = {26}, number = {1}, pages = {148}, pmid = {40452057}, issn = {1474-760X}, support = {031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 031B0514A- E//Bundesministerium f&#xfc;r Bildung und Forschung/ ; }, mesh = {*Zea mays/microbiology/growth &amp; development ; *Rhizosphere ; *Microbiota ; *Stress, Physiological ; Bacillus ; Plant Roots/microbiology ; Soil Microbiology ; *Agricultural Inoculants/physiology ; }, abstract = {BACKGROUND: Field inoculation of crops with beneficial microbes is a promising sustainable strategy to enhance plant fitness and nutrient acquisition. However, effectiveness can vary due to environmental factors, microbial competition, and methodological challenges, while their precise modes of action remain uncertain. This underscores the need for further research to optimize inoculation strategies for consistent agricultural benefits.<br><br>RESULTS: Using a comprehensive, multidisciplinary approach, we investigate the effects of a consortium of beneficial microbes (BMc) (Pseudomonas sp. RU47, Bacillus atrophaeus ABi03, Trichoderma harzianum OMG16) on maize (Zea mays cv. Benedictio) through an inoculation experiment conducted within a long-term field trial across intensive and extensive farming practices. Additionally, an unexpected early drought stress emerged as a climatic variable, offering further insight into the effectiveness of the microbial consortium. Our findings demonstrate that BMc root inoculation primarily enhanced plant growth and fitness, particularly by increasing iron uptake, which is crucial for drought adaptation. Inoculated maize plants show improved shoot growth and fitness compared to non-inoculated plants, regardless of farming practices. Specifically, BMc modulate plant hormonal balance, enhance the detoxification of reactive oxygen species, and increase root exudation of iron-chelating metabolites. Amplicon sequencing reveals shifts in rhizosphere bacterial and fungal communities mediated by the consortium. Metagenomic shotgun sequencing indicates enrichment of genes related to antimicrobial lipopeptides and siderophores.<br><br>CONCLUSIONS: Our findings highlight the multifaceted benefits of BMc inoculation on plant fitness, significantly influencing metabolism, stress responses, and the rhizosphere microbiome. These improvements are crucial for advancing sustainable agricultural practices by enhancing plant resilience and productivity.}, }
@article {pmid40451005, year = {2025}, author = {Su, X and Liu, J and Chang, L and Hu, W and Fang, Y and Li, J and Huang, L and Shu, W and Dong, H}, title = {Viral insights into the acidification of sulfidic mine tailings.}, journal = {Journal of hazardous materials}, volume = {494}, number = {}, pages = {138754}, doi = {10.1016/j.jhazmat.2025.138754}, pmid = {40451005}, issn = {1873-3336}, abstract = {The acidification of sulfidic mine tailings, driven primarily by sulfur- and iron-oxidizing microorganisms, can lead to severe environmental pollution and imperil human health. The role of viruses in this process and its underlying mechanisms yet remain poorly understood. In this study, we recovered 623 species-level viral genomes and 322 prokaryotic genomes from seven metagenomes of mine tailings with pH values ranging from 7.51 to 2.13. We observed that acidification drastically altered geochemical properties and degraded environmental quality, characterized by significant decreases in carbon/nitrogen ratio and heavy metal levels. The structure and function of viral communities were significantly correlated with pH and prokaryotic diversity, showing distinct dynamics across different acidification stages, similar to patterns observed in the prokaryotic community. Notably, potential sulfur-oxidizing prokaryotes increased in relative abundance as pH declined, while their virus-host abundance ratio exhibited a significant positive correlation with pH. Results indicated that viral "top-down" predation on sulfur-oxidizing prokaryotes was likely suppressed during acidification, providing a survival advantage to these organisms over iron-oxidizing counterparts. Moreover, viruses likely reprogrammed the sulfur and iron metabolism of prokaryotic hosts and enhanced their adaptability to environmental stressors through auxiliary metabolic genes. Additionally, a pH- and lifestyle-dependent evolutionary scenario for viruses revealed that frequent recombination and the accumulation of synonymous mutations in lytic viruses and chronic Inoviridae, likely increased their intrapopulation diversity and resilience. These findings provide new insights into the multifaceted roles of viruses in mine tailings acidification, deepening understanding of the underlying mechanisms and advancing potential strategies to mitigate associated environmental risks.}, }
@article {pmid40450783, year = {2025}, author = {Rajput, V and Pramanik, R and Nannaware, K and Shah, P and Bhalerao, A and Jain, N and Shashidhara, LS and Kamble, S and Dastager, S and Dharne, M}, title = {Metagenomics based longitudinal monitoring of antibiotic resistome and microbiome in the inlets of wastewater treatment plants in an Indian megacity.}, journal = {The Science of the total environment}, volume = {986}, number = {}, pages = {179691}, doi = {10.1016/j.scitotenv.2025.179691}, pmid = {40450783}, issn = {1879-1026}, mesh = {India ; *Wastewater/microbiology ; *Microbiota ; Metagenomics ; *Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents ; *Environmental Monitoring ; Bacteria ; Waste Disposal, Fluid ; Cities ; }, abstract = {The growing threat of antimicrobial resistance (AMR) poses a significant global challenge, undermining advancements in healthcare, agriculture, and life expectancy. Despite its critical importance, data on population-level AMR trends, including seasonal and temporal variations, remain scarce. In this study, we conducted metagenomic analysis on 190 wastewater samples collected monthly from December 2022 to December 2023 in Pune, India, to assess the diversity, dynamics, and co-occurrence of AMR determinants. Using nanopore shotgun sequencing, we generated 87.86 Gbp of data, enabling the taxonomic classification of 157 bacterial phyla and 3291 genera. Proteobacteria dominated the microbial community, with notable seasonal shifts, including increased Streptococcus abundance correlating with SARS-CoV-2 viral surges in March 2023. We identified 637 distinct antimicrobial resistance genes (ARGs) associated with 29 antibiotic classes, with multidrug, macrolide-lincosamide-streptogramin, beta-lactams, and tetracyclines genes being the most prevalent, particularly within WHO priority pathogens such as Enterobacteriaceae and Pseudomonas. Temporal normalization of ARG abundance revealed significant seasonal variability, peaking during winter, potentially driven by increased antibiotic use for respiratory infections. The integration of viral load data with AMR trends highlighted complex interactions between viral outbreaks and AMR dissemination. This study demonstrates the potential of wastewater surveillance as an early warning system for AMR, providing valuable insights into environmental and community resistance dynamics. Our results underscore the importance of integrated AMR surveillance to inform public health strategies aimed at mitigating the global AMR threat.}, }
@article {pmid40450182, year = {2025}, author = {Wang, C and Dong, T and Rong, X and Yang, Y and Mou, J and Li, J and Ge, J and Mu, X and Jiang, J}, title = {Microbiome in prostate cancer: pathogenic mechanisms, multi-omics diagnostics, and synergistic therapies.}, journal = {Journal of cancer research and clinical oncology}, volume = {151}, number = {6}, pages = {178}, pmid = {40450182}, issn = {1432-1335}, support = {82172230//the National Natural Science Foundation of China/ ; 21ZGY29//the Changchun Scientific and Technological Development Program/ ; 3R218FM83430//Life Spring AKY Pharmaceuticals/ ; 20240205001YY//the Jilin Scientific and Technological Development Program/ ; 2017F014//the Jilin Health Service Capacity Improvement Program/ ; }, mesh = {Humans ; *Prostatic Neoplasms/microbiology/therapy/diagnosis/pathology ; Male ; *Microbiota ; Metagenomics/methods ; Multiomics ; }, abstract = {BACKGROUND: Prostate cancer (PCa) is a leading cause of cancer-related deaths in men, with the microbiome emerging as a significant factor in its development and progression. Understanding the microbiome's role could provide new insights into PCa pathogenesis and treatment.<br><br>OBJECTIVE: This review aims to explore the interactions between the microbiome and PCa, focusing on microbial imbalances and their effects on immune responses, inflammation, and hormone levels. It also discusses advanced research techniques and the potential for microbiome modulation in PCa management.<br><br>METHODS: The review synthesizes current literature on the microbiome's role in PCa, highlighting differences in microbial composition between cancerous and healthy prostate tissues. It examines techniques such as high-throughput sequencing and metagenomics and explores the mechanisms through which the microbiome influences PCa.<br><br>CONCLUSIONS: The review reveals substantial microbial differences in prostate tissues of PCa patients compared to healthy individuals, indicating a potential link between microbiome alterations and disease progression. It highlights the promise of microbiome-based strategies for diagnosis and treatment and underscores the need for further research into personalized, microbiome-centric approaches for PCa management.}, }
@article {pmid40449445, year = {2025}, author = {Zheng, Z and Gustavsson, DJI and Zheng, D and Holmin, F and Falås, P and Wilén, BM and Modin, O and Persson, F}, title = {Genome-centric metagenomics reveals the effect of organic carbon source on one-stage partial denitrification-anammox in biofilm reactors.}, journal = {Journal of environmental management}, volume = {388}, number = {}, pages = {125972}, doi = {10.1016/j.jenvman.2025.125972}, pmid = {40449445}, issn = {1095-8630}, mesh = {*Denitrification ; *Bioreactors ; Biofilms ; Carbon/metabolism ; Nitrogen/metabolism ; Wastewater ; Metagenomics ; Microbiota ; Waste Disposal, Fluid ; }, abstract = {Nitrogen removal from wastewater with anammox saves energy and resources. Partial denitrification-anammox (PDA) is a promising process alternative for municipal wastewater treatment, given that the understanding about how to control the microbiome and its activity reach sufficient level. Here, two moving bed biofilm reactors were fed with either acetate or propionate to study the role of organic carbon type for microbiome composition and nitrogen turnover during development of PDA. With acetate, 87 % of the removed nitrogen was converted via anammox during stable operation at a rate of 0.52 g N/(m[2]·d). With propionate, the anammox contribution was considerably lower (41 %), as was the rate of nitrogen removal (0.27 g N/(m[2]·d)). The microbiome composition in the acetate- and propionate-fed reactors was however similar, with an enrichment of metagenome assembled genomes (MAGs) having genes for nitrate reduction (narG, napA). A large fraction of these MAGs had the potential to accumulate nitrite since they lacked genes for nitrite reduction (nirS, nirK, nrfA). Genes for acetate utilization were common among these MAGs, but the necessary genes for propionate conversion were rare, suggesting that the genetic make-up of the individual denitrifiers had major influence on the nitrogen turnover. One anammox MAG (Ca. Brocadia sapporoensis), harboring genes for organic carbon utilization, prevailed in the PDA reactors. Another three anammox MAGs (Ca. B. fulgida, Ca. B. pituitae and a potentially new species within Ca. Brocadia), lacking genes for organic carbon utilization, decreased in abundance in the reactors, indicating the importance of metabolic versatility for anammox bacteria in PDA.}, }
@article {pmid40448221, year = {2025}, author = {Fan, KC and Lin, CC and Chiu, YL and Koh, SH and Liu, YC and Chuang, YF}, title = {Compositional and functional gut microbiota alterations in mild cognitive impairment: links to Alzheimer's disease pathology.}, journal = {Alzheimer's research &amp; therapy}, volume = {17}, number = {1}, pages = {122}, pmid = {40448221}, issn = {1758-9193}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Cognitive Dysfunction/microbiology/pathology/metabolism ; *Alzheimer Disease/microbiology/pathology/metabolism ; Male ; Female ; Aged ; Feces/microbiology ; Biomarkers ; Brain/pathology/metabolism ; Aged, 80 and over ; Dysbiosis ; tau Proteins ; Middle Aged ; }, abstract = {BACKGROUND: Emerging evidence highlights the bidirectional communication between the gut microbiota and the brain, suggesting a potential role for gut dysbiosis in Alzheimer's disease (AD) pathology and cognitive decline. Existing literature on gut microbiota lacks species-level insights. This study investigates gut microbiota alterations in mild cognitive impairment (MCI), focusing on their association with comprehensive AD biomarkers, including amyloid burden, tau pathology, neurodegeneration, and cognitive performance.<br><br>METHODS: We analyzed fecal samples from 119 individuals with MCI and 320 cognitively normal controls enrolled in the Taiwan Precision Medicine Initiative on Cognitive Impairment and Dementia cohort. Shotgun metagenomic sequencing was conducted with taxonomic profiling using MetaPhlAn4. Amyloid burden and plasma pTau181 were quantified via PET imaging and Simoa assays, respectively, while APOE genotyping was performed using TaqMan assays. Microbial diversity, differential abundance analysis, and correlation mapping with neuropsychological and neuroimaging measures were conducted to identify gut microbiota species signatures associated with MCI and AD biomarkers.<br><br>RESULTS: We identified 59 key microbial species linked to MCI and AD biomarkers. Notably, species within the same genera, such as Bacteroides and Ruminococcus, showed opposing effects, while Akkermansia muciniphila correlated with reduced amyloid burden, suggesting a protective role. Functional profiling revealed microbial pathways contributing to energy metabolism and neuroinflammation, mediating the relationship between gut microbes and brain health. Co-occurrence network analyses demonstrated complex microbial interactions, indicating that the collective influence of gut microbiota on neurodegeneration.<br><br>CONCLUSIONS: Our findings challenge genus-level microbiome analyses, revealing species-specific modulators of AD pathology. This study highlights gut microbial activity as a potential therapeutic target to mitigate cognitive decline and neurodegeneration.}, }
@article {pmid40447596, year = {2025}, author = {Wang, X and Jiang, Q and Tian, X and Chen, W and Mai, J and Lin, G and Huo, Y and Zheng, H and Yan, D and Wang, X and Li, T and Gao, Y and Mou, X and Zhao, W}, title = {Metagenomic analysis reveals the novel role of vaginal Lactobacillus iners in Chinese healthy pregnant women.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {92}, pmid = {40447596}, issn = {2055-5008}, mesh = {Adult ; Female ; Humans ; Pregnancy ; Young Adult ; Biofilms/growth &amp; development ; China ; Gardnerella vaginalis/growth &amp; development ; *Lactobacillus/genetics/isolation &amp; purification/classification/physiology ; *Metagenomics/methods ; Microbiota ; Pregnant People ; *Vagina/microbiology ; Vaginosis, Bacterial/microbiology ; }, abstract = {This study investigated the relationship between vaginal microbiota and women's health conditions in 95 Chinese pregnant women in their third trimester. We conducted vaginal metagenomic analysis, examining species, functional pathways, and genes, and utilized correlation and LEfSe analyses to link microbiota to health conditions. Results revealed that healthy participants exhibited higher levels of Lactobacillus iners, with its abundance associated with tetrahydrofolate biosynthesis pathways. They also possessed more glycosyltransferase and ErmB antibiotic resistance genes compared to women with diagnosed conditions. Comparative genomics demonstrated that L. iners strains linked to bacterial vaginosis (BV) possessed more genes encoding biofilm-associated YhgE/Pip domain-containing proteins than healthy-associated strains. Notably, three BV-associated L. iners strains exhibited stronger biofilm formation abilities than four healthy-associated strains isolated in this study. Also, four out of seven L. iners strains inhibited the growth of Gardnerella vaginalis. Overall, L. iners may help maintain vaginal ecosystem stability in Chinese pregnant women.}, }
@article {pmid40447574, year = {2025}, author = {Rodríguez Del Río, &#xc1; and Scheu, S and Rillig, MC}, title = {Soil microbial responses to multiple global change factors as assessed by metagenomics.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {5058}, pmid = {40447574}, issn = {2041-1723}, mesh = {*Soil Microbiology ; *Metagenomics/methods ; *Bacteria/genetics/classification/drug effects ; Metagenome ; Soil/chemistry ; Droughts ; Microbiota/genetics ; Salinity ; *Climate Change ; Global Warming ; }, abstract = {Anthropogenic activities impose multiple concurrent pressures on soils globally, but responses of soil microbes to multiple global change factors are poorly understood. Here, we apply 10 treatments (warming, drought, nitrogen deposition, salinity, heavy metal, microplastics, antibiotics, fungicides, herbicides and insecticides) individually and in combinations of 8 factors to soil samples, and monitor their bacterial and viral composition by metagenomic analysis. We recover 742 mostly unknown bacterial and 1865 viral Metagenome-Assembled Genomes (MAGs), and leverage them to describe microbial populations under different treatment conditions. The application of multiple factors selects for prokaryotic and viral communities different from any individual factor, favouring the proliferation of potentially pathogenic mycobacteria and novel phages, which apparently play a role in shaping prokaryote communities. We also build a 25 M gene catalog to show that multiple factors select for metabolically diverse, sessile and non-biofilm-forming bacteria with a high load of antibiotic resistance genes. Finally, we show that novel genes are relevant for understanding microbial response to global change. Our study indicates that multiple factors impose selective pressures on soil prokaryotes and viruses not observed at the individual factor level, and emphasizes the need of studying the effect of concurrent global change treatments.}, }
@article {pmid40445192, year = {2025}, author = {Mullinax, SR and Darby, AM and Gupta, A and Chan, P and Smith, BR and Unckless, RL}, title = {A suite of selective pressures supports the maintenance of alleles of a Drosophila immune peptide.}, journal = {eLife}, volume = {12}, number = {}, pages = {}, pmid = {40445192}, issn = {2050-084X}, support = {CMADP COBRE P20-GM103638/NH/NIH HHS/United States ; R01 AI139154/AI/NIAID NIH HHS/United States ; AI139154/NH/NIH HHS/United States ; P20 GM103638/GM/NIGMS NIH HHS/United States ; 2330095//National Science Foundation/ ; }, mesh = {Animals ; *Alleles ; Female ; Male ; *Drosophila Proteins/genetics/immunology ; *Selection, Genetic ; Providencia/immunology ; *Drosophila/genetics/immunology/microbiology ; Gastrointestinal Microbiome ; *Drosophila melanogaster/genetics/immunology/microbiology ; *Antimicrobial Peptides/genetics/immunology ; }, abstract = {The innate immune system provides hosts with a crucial first line of defense against pathogens. While immune genes are often among the fastest evolving genes in the genome, in Drosophila, antimicrobial peptides (AMPs) are notable exceptions. Instead, AMPs may be under balancing selection, such that over evolutionary timescales, multiple alleles are maintained in populations. In this study, we focus on the Drosophila AMP Diptericin A, which has a segregating amino acid polymorphism associated with differential survival after infection with the Gram-negative bacteria Providencia rettgeri. Diptericin A also helps control opportunistic gut infections by common Drosophila gut microbes, especially those of Lactobacillus plantarum. In addition to genotypic effects on gut immunity, we also see strong sex-specific effects that are most prominent in flies without functional diptericin A. To further characterize differences in microbiomes between different diptericin genotypes, we used 16S metagenomics to look at the microbiome composition. We used both lab-reared and wild-caught flies for our sequencing and looked at overall composition as well as the differential abundance of individual bacterial families. Overall, we find flies that are homozygous for one allele of diptericin A are better equipped to survive a systemic infection from P. rettgeri, but in general have a shorter lifespans after being fed common gut commensals. Our results suggest a possible mechanism for the maintenance of genetic variation of diptericin A through the complex interactions of sex, systemic immunity, and the maintenance of the gut microbiome.}, }
@article {pmid40443669, year = {2025}, author = {Zhang, C and Xu, Y and Zhang, M and Li, J and Sun, Z and Wang, Y and Lin, P}, title = {An exploratory study on the metagenomic and proteomic characterization of hypothyroidism in the first half of pregnancy and correlation with Th1/Th2 balance.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1500866}, pmid = {40443669}, issn = {1664-3224}, mesh = {Humans ; Female ; Pregnancy ; *Hypothyroidism/immunology/microbiology/metabolism ; Adult ; Proteomics/methods ; *Th2 Cells/immunology/metabolism ; *Th1 Cells/immunology/metabolism ; Metagenomics/methods ; *Gastrointestinal Microbiome/immunology ; *Pregnancy Complications/immunology/metabolism/microbiology ; *Proteome ; Cytokines/metabolism ; }, abstract = {OBJECTIVE: To explore the gut microbiota and proteomic characteristics of hypothyroidism in the first half of pregnancy (referred to as hypothyroidism in the first half of pregnancy) and its association with Th (T helper cells, Th)1/Th2 balance using metagenomics combined with proteomics.<br><br>METHODS: Stool and blood samples were collected from 20 hypothyroid (hypothyroidism group) and normal pregnant women (normal group) in the first half of pregnancy. Flora and proteomic characteristics were analyzed using metagenomics sequencing and 4D-DIA proteomics. Th1 and Th2 cells were quantified, and cytokine levels were measured using cellular micro-bead arra. The enzyme-linked immunosorbent test (ELISA) was utilized to assess differential proteins.<br><br>RESULTS: (1) Metagenomic sequencing revealed distinct microbial profiles: The &#x3b2;-diversity of gut microbiota was diminished in the hypothyroidism group (p < 0.05). LEfSe analysis identified Phocaeicola vulgatus and Bacteroides fragilis enriched in the hypothyroidism group (p<0.05), and Kyoto Encyclopedia of Genes and Genomes(KEGG) analysis showed significant enrichment in pathways related to peptidoglycan biosynthesis and glycerol ester metabolism.(2) Proteomic analysis demonstrated downregulation of Diacylglycerol Kinase Kappa (DGKK) and P05109|S10A8(S10A8) proteins in the hypothyroidism group, with marked enrichment in the KEGG pathways for vascular smooth muscle contraction and phosphatidylinositol signaling. (3) ELISA validation confirmed that the proteins DGKK and S10A8 were downregulated in pregnant women in the hypothyroidism group.<br><br>CONCLUSION: Increased P. vulgatus and B. fragilis, decreased DGKK and S10A8 proteins, and a left shift in the Th1/Th2 balance in patients with hypothyroidism in the first half of pregnancy may be associated with the development of the disease.}, }
@article {pmid40442718, year = {2025}, author = {Pivrncova, E and Bohm, J and Barton, V and Klanova, J and Borilova Linhartova, P}, title = {Viable bacterial communities in freshly pumped human milk and their changes during cold storage conditions.}, journal = {International breastfeeding journal}, volume = {20}, number = {1}, pages = {44}, pmid = {40442718}, issn = {1746-4358}, support = {LM2023069//Ministerstvo &#x160;kolstv&#xed;, Ml&#xe1;de&#x17e;e a T&#x11b;lov&#xfd;chovy/ ; 857560//Horizon 2020 Framework Programme/ ; }, mesh = {Humans ; *Milk, Human/microbiology ; Female ; *Bacteria/isolation &amp; purification/genetics/classification ; *Food Storage/methods ; Adult ; RNA, Ribosomal, 16S ; *Microbiota ; Freezing ; Refrigeration ; Azides ; Propidium/analogs &amp; derivatives ; }, abstract = {BACKGROUND: Human milk harbors diverse bacterial communities that contribute to infant health. Although pumping and storing milk is a common practice, the viable bacterial composition of pumped milk and the impact of storage practice on these bacteria remains under-explored. This metagenomic observational study aimed to characterize viable bacterial communities in freshly pumped human milk and its changes under different storage conditions.<br><br>METHODS: In 2023, twelve lactating mothers from the CELSPAC: TNG cohort (Czech Republic) provided freshly pumped milk samples. These samples were stored under various conditions (refrigeration for 24&#xa0;h, 48&#xa0;h, or freezing for six weeks) and treated with propidium monoazide (PMA) to selectively identify viable cells. The DNA extracted from individual samples was subsequently analyzed using 16S rRNA amplicon sequencing on the Illumina platform.<br><br>RESULTS: The genera Streptococcus, Staphylococcus, Diaphorobacter, Cutibacterium, and Corynebacterium were the most common viable bacteria in fresh human milk. The median sequencing depth and Shannon index of fresh human milk samples treated with PMA (+&#x2009;PMA) were significantly lower than in untreated (-PMA) samples (p&#x2009;<&#x2009;0.05 for all), which was true also for each time point. Also, significant changes in these parameters were observed between fresh human milk samples and their paired frozen samples (p&#x2009;<&#x2009;0.05), while no differences were found between fresh human milk samples and those refrigerated for up to 48&#xa0;h (p&#x2009;>&#x2009;0.05). Of specific genera, only&#x2009;+&#x2009;PMA frozen human milk samples showed a significant decrease in the central log-ratio transformed relative abundances of the genera Diaphorobacter and Cutibacterium (p&#x2009;<&#x2009;0.05) in comparison to&#x2009;+&#x2009;PMA fresh human milk samples.<br><br>CONCLUSIONS: The study demonstrated that the bacterial profiles significantly differed between human milk samples treated with PMA, which represent only viable bacteria, and those untreated. While storage at 4&#xa0;&#xb0;C for up to 48&#xa0;h did not significantly alter the overall diversity and composition of viable bacteria in human milk, freezing notably affected both the viability and relative abundances of some bacterial genera.}, }
@article {pmid40442154, year = {2025}, author = {Seong, HJ and Park, YM and Kim, BS and Yoo, HJ and Kim, T and Yoon, SM and Kim, JH and Lee, SY and Lee, YK and Lee, DW and Nam, MH and Hong, SJ}, title = {Integrated multi-omics reveals different host crosstalk of atopic dermatitis-enriched Bifidobacterium longum Strains.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {91}, pmid = {40442154}, issn = {2055-5008}, mesh = {Humans ; *Dermatitis, Atopic/microbiology ; *Gastrointestinal Microbiome ; Infant ; *Bifidobacterium longum/genetics/isolation &amp; purification/classification/metabolism ; Female ; Male ; Metabolomics ; Metagenomics/methods ; Feces/microbiology ; *Host Microbial Interactions ; Clostridium/genetics/isolation &amp; purification ; Transcriptome ; Multiomics ; }, abstract = {The infant gut microbiome is essential for long-term health and is linked to atopic dermatitis (AD), although the underlying mechanisms are not fully understood. This study investigated gut microbiome-host interactions in 31 infants with AD and 29 healthy controls using multi-omics approaches, including metagenomic, host transcriptomic, and metabolomic analyses. Microbial diversity was significantly altered in AD, with Bifidobacterium longum and Clostridium innocuum associated with these changes. At the strain-level, only B. longum differed significantly between groups, with pangenome analyses identifying genetic variations potentially affecting amino acid and lipid metabolites. Notably, B. longum subclade I, which was more prevalent in healthy controls, correlated with host transcriptomic pathways involved in phosphatidylinositol 3-kinase-AKT signaling and neuroactive ligand-receptor pathways, as well as specific metabolites, including tetrahydrocortisol and ornithine. These findings highlight the role of B. longum strain-level variation in infants, offering new insights into microbiome-host interactions related to AD.}, }
@article {pmid40441146, year = {2025}, author = {Yang, Y and Duan, Y and Lang, S and Fondevila, MF and Schöler, D and Harberts, A and Cabré, N and Chen, S and Shao, Y and Vervier, K and Miyamoto, Y and Zhang, X and Chu, H and Yang, L and Tan, C and Eckmann, L and Bosques-Padilla, F and Verna, EC and Abraldes, JG and Brown, RS and Vargas, V and Altamirano, J and Caballería, J and Shawcross, DL and Louvet, A and Lucey, MR and Mathurin, P and Garcia-Tsao, G and Bataller, R and Stärkel, P and Lawley, TD and Schnabl, B}, title = {Targeted inhibition of pathobiont virulence factor mitigates alcohol-associated liver disease.}, journal = {Cell host &amp; microbe}, volume = {33}, number = {6}, pages = {957-972.e6}, pmid = {40441146}, issn = {1934-6069}, support = {I01 BX004594/BX/BLRD VA/United States ; P30 DK120515/DK/NIDDK NIH HHS/United States ; R01 AA024726/AA/NIAAA NIH HHS/United States ; P50 AA011999/AA/NIAAA NIH HHS/United States ; U01 AA026939/AA/NIAAA NIH HHS/United States ; R37 AA020703/AA/NIAAA NIH HHS/United States ; U01 AA021856/AA/NIAAA NIH HHS/United States ; }, mesh = {Humans ; Animals ; *Virulence Factors/genetics/antagonists &amp; inhibitors/metabolism ; Mice ; *Escherichia coli/genetics/pathogenicity/drug effects/metabolism ; *Liver Diseases, Alcoholic/microbiology/drug therapy ; Gastrointestinal Microbiome ; Disease Models, Animal ; Feces/microbiology ; Kupffer Cells/metabolism/microbiology ; *Escherichia coli Proteins/genetics/metabolism/antagonists &amp; inhibitors ; Male ; Female ; Liver/pathology/microbiology ; Germ-Free Life ; Ethanol ; Mice, Inbred C57BL ; Escherichia coli Infections/microbiology ; Bacterial Capsules/metabolism ; Hepatitis, Alcoholic/microbiology ; }, abstract = {Alcohol-associated liver disease poses a global health burden with high mortality. Imbalances in the gut microbiota are important for disease progression. Using metagenomic sequencing of fecal samples from a multicenter, international cohort of patients with alcohol-associated hepatitis, we found that the presence of virulence factor KpsM, encoded in the genome of Escherichia coli (E. coli), correlated with patient mortality. Functional studies using gnotobiotic mouse models and genetic manipulation of bacteria demonstrated that kpsM-positive E. coli exacerbate ethanol-induced liver disease. The kpsM gene mediates the translocation of capsular polysaccharides to the cell surface. This enables kpsM-positive E. coli to evade phagocytosis by the scavenger receptor Marco on Kupffer cells in the liver, leading to bacterial spread. Importantly, inhibiting kpsM-dependent capsules with the small molecule 2-(4-phenylphenyl)benzo[g]quinoline-4-carboxylic acid (C7) attenuated ethanol-induced liver disease in mice. We show that precision targeting of the virulence factor KpsM is a promising approach to improve outcomes of patients with alcohol-associated hepatitis.}, }
@article {pmid40440092, year = {2025}, author = {Lawniczak, MKN and Kocot, KM and Astrin, JJ and Blaxter, M and Sotero-Caio, CG and Barker, KB and Childers, AK and Coddington, J and Davis, P and Howe, K and Johnson, WE and McKenna, DD and Wideman, JG and Pettersson, OV and Ras, V and Santos, BF and , }, title = {Best-practice guidance for Earth BioGenome Project sample collection and processing: progress and challenges in biodiverse reference genome creation.}, journal = {GigaScience}, volume = {14}, number = {}, pages = {}, pmid = {40440092}, issn = {2047-217X}, support = {//Science for Life Laboratory/ ; //Swedish Research Council/ ; 1846174//National Science Foundation/ ; 2138994//National Science Foundation/ ; 2321308//National Science Foundation/ ; 2001303//National Science Foundation/ ; 2110053//National Science Foundation/ ; 1937815//National Science Foundation/ ; DBI-2119963//National Science Foundation/ ; U24HG006941/HG/NHGRI NIH HHS/United States ; /NH/NIH HHS/United States ; //Agricultural Research Service/ ; }, mesh = {*Genome ; *Genomics/standards/methods ; *Metagenomics/standards/methods ; Earth, Planet ; *Specimen Handling/standards/methods ; }, abstract = {The Earth BioGenome Project has the extremely ambitious goal of generating, at scale, high-quality reference genomes across the entire Tree of Life. Currently in its first phase, the project is targeting family-level representatives and is progressing rapidly. Here we outline recommended standards and considerations in sample acquisition and processing for those involved in biodiverse reference genome creation. These standards and recommendations will evolve with advances in related processes. Additionally, we discuss the challenges raised by the ambitions for later phases of the project, highlighting topics related to sample collection and processing that require further development.}, }
@article {pmid40439232, year = {2025}, author = {McGivern, BB and Ellenbogen, JB and Hoyt, DW and Bouranis, JA and Stemple, BP and Daly, RA and Bosman, SH and Sullivan, MB and Hagerman, AE and Chanton, JP and Tfaily, MM and Wrighton, KC}, title = {Polyphenol rewiring of the microbiome reduces methane emissions.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, doi = {10.1093/ismejo/wraf108}, pmid = {40439232}, issn = {1751-7370}, mesh = {*Methane/metabolism ; *Microbiota/drug effects ; *Catechin/metabolism ; *Polyphenols/metabolism ; Hydrogen/metabolism ; *Bacteria/metabolism/genetics/classification ; Greenhouse Gases/metabolism ; Soil Microbiology ; }, abstract = {Methane mitigation is regarded as a critical strategy to combat the scale of global warming. Currently, ~40% of methane emissions originate from microbial sources, which is causing strategies to suppress methanogens-either through direct toxic effects or by diverting their substrates and energy-to gain traction. Problematically, current microbial methane mitigation knowledge lacks detailed microbiome-centered insights, limiting translation across conditions and ecosystems. Here we utilize genome-resolved metatranscriptomes and metabolomes to assess the impact of a proposed methane inhibitor, catechin, on greenhouse gas emissions for high-methane-emitting peatlands. In microcosms, catechin drastically reduced methane emissions by 72%-84% compared to controls. Longitudinal sampling allowed for reconstruction of a catechin degradation pathway involving Actinomycetota and Clostridium, which break down catechin into smaller phenolic compounds within the first 21 days, followed by degradation of phenolic compounds by Pseudomonas_E from Days 21 to 35. These genomes co-expressed hydrogen-uptake genes, suggesting hydrogenases may act as a hydrogen sink during catechin degradation and consequently reduce hydrogen availability to methanogens. In support of this idea, there was decreased gene expression by hydrogenotrophic and hydrogen-dependent methylotrophic methanogens under catechin treatment. There was also reduced gene expression from genomes inferred to be functioning syntrophically with hydrogen-utilizing methanogens. We propose that catechin metabolic redirection effectively starves hydrogen-utilizing methanogens, offering a potent avenue for curbing methane emissions across diverse environments including ruminants, landfills, and constructed or managed wetlands.}, }
@article {pmid40438118, year = {2025}, author = {Diallo, D and Sun, S and Somboro, AM and Baya, B and Koné, A and Diarra, B and Nantoumé, M and Koloma, I and Diakite, M and Holl, J and Maiga, AI and Seydi, M and Theron, G and Hou, L and Fodor, A and Maiga, M}, title = {Metabolic and immune consequences of antibiotic related microbiome alterations during first-line tuberculosis treatment in Bamako, Mali.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1561459}, pmid = {40438118}, issn = {1664-3224}, support = {D43 CA260658/CA/NCI NIH HHS/United States ; D43 TW010543/TW/FIC NIH HHS/United States ; R21 AI148033/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/immunology ; Male ; Female ; Adult ; Mali ; *Dysbiosis/chemically induced/immunology ; Middle Aged ; *Tuberculosis/drug therapy/microbiology/immunology/metabolism ; Cytokines/blood ; Longitudinal Studies ; *Antitubercular Agents/therapeutic use/adverse effects ; Young Adult ; Metabolomics ; }, abstract = {BACKGROUND: Individuals with a history of tuberculosis (TB) treatment are at a higher risk of experiencing a recurrent episode of the disease. Previous cross-sectional studies identified a connection between dysbiosis (alterations) in the gut microbiota composition and the administration of first-line TB antibiotics. However, these studies have not successfully elucidated this dysbiosis's resulting metabolic and immune consequences.<br><br>METHODS: In a longitudinal assessment, we studied the antituberculosis drug-related changes in the gut microbiota's composition and the resulting functional consequences. Sputum for TB culture, peripheral blood for metabolomics and cytokines analysis, and stool for shotgun metagenomics were collected from TB participants at Month-0, Month-2, Month-6 of treatment, and 9 Months after treatment (Month-15). Healthy controls were sampled at Month-0 and Month-6.<br><br>FINDINGS: We found notable differences in gut microbiota between individuals with TB and healthy controls. While gut microbiota tended to resemble healthy controls at the end of TB treatment, significant differences for many taxa persisted up to Month-15. Concurrently, disturbances in plasma metabolites, including tryptophan, tricarboxylic acids, and cytokine levels were observed. Certain fatty acids associated with inflammation pathways negatively correlated with the abundance of several taxa.<br><br>CONCLUSION: We observed alterations in the gut microbiota composition and function during treatment and at Month-15. Numerous changes in bacterial taxa abundances and inflammation-linked metabolites did not reverse at Month-15. This study suggests potential influences of anti-TB drugs and the gut microbiome on the disease outcome, response to treatment, and resistance to future TB infections.}, }
@article {pmid40437611, year = {2025}, author = {Zhang, P and Tuo, X and Jiang, J and Zhang, Y and Zhao, J and Deng, C and Zhao, G and Cheng, Y and Song, L and Yang, Y and Guo, R and Zhang, H and Zhao, H and Ma, S and Li, L and Shi, H}, title = {Characteristics of the gut virome in patients with premalignant colorectal adenoma.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {597}, pmid = {40437611}, issn = {1479-5876}, support = {No.S2024-JC-QN-1554//Natural Science Basic Research Program of Shaanxi Province/ ; }, mesh = {Humans ; *Virome ; *Colorectal Neoplasms/virology/microbiology ; *Adenoma/virology/microbiology ; *Gastrointestinal Microbiome ; Male ; Female ; Middle Aged ; *Precancerous Conditions/virology/microbiology ; Case-Control Studies ; Aged ; Reproducibility of Results ; }, abstract = {BACKGROUND: The multi-kingdom gut microbiota (e.g., bacteriome, mycobiome, and virome) characteristics of colorectal cancer have been extensively studied, yet there is still an insufficient description of the microbiota features in its early-stage, colorectal adenoma, particularly in the gut virome aspect.<br><br>METHODS: Based on the Metagenomic Gut Virus catalogue (MGV) containing 54,118 non-redundant gut viral genomes, this study characterized the virome composition and diversity using publicly available metagenomic sequencing data from 419 individuals with premalignant colorectal adenoma and 552 healthy controls. Furthermore, we identified and assessed the reliability and classification performance of adenoma-associated microbial signatures through comparative analysis and the random forest model.<br><br>RESULTS: Our results revealed a notable shift in the gut virome structure of patients compared to healthy controls, characterized by a significant increase in viral families such as Microviridae, Podoviridae_crAss-like, and Quimbyviridae. At the viral operational taxonomic unit (vOTU) level, we identified 479 vOTU signatures showing significant differences in relative abundances between patients and controls, including some patient-enriched vOTUs tending to infect Bacteroidaceae and Lachnospiraceae. Correlation network analysis revealed specific bacterial species correlated with adenoma-associated viruses, suggesting frequent interactions between them. Moreover, random forest models trained on gut viral and bacterial signatures demonstrated area under the curve (AUC) scores of 0.68, 0.82, and 0.76 for classifying healthy individuals versus patients with tubular adenomas, patients with sessile serrated adenomas, and patients with both conditions, respectively. In three independent validation cohorts, the classification performance achieved AUC scores ranging from 0.61 to 0.65.<br><br>CONCLUSIONS: Our study provides insights into the gut virome in premalignant colorectal adenoma, highlighting its potential role in disease development and diagnosis. Further investigations are warranted to elucidate the underlying mechanisms of gut virus-bacteria interactions and validate diagnostic models in larger populations.}, }
@article {pmid40436871, year = {2025}, author = {Zeng, L and Yu, B and Zeng, P and Duoji, Z and Zuo, H and Lian, J and Yang, T and Dai, Y and Feng, Y and Yu, P and Yang, J and Yang, S and Dou, Q}, title = {Mediation effect and metabolic pathways of gut microbiota in the associations between lifestyles and dyslipidemia.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {90}, pmid = {40436871}, issn = {2055-5008}, support = {723B2017//National Natural Science Foundation of China/ ; XZ202201ZD0001G//Science and Technology Major Project of Tibetan Autonomous Region of China/ ; XZ202303ZY0007G//Science and Technology Plan Projects of Tibet Autonomous Region/ ; CQFYJB01005//Chongqing Maternal and Child Health Hospital/ ; 2023YFC3604702//National Key Research and Development Program of China/ ; 2023YFC3604701; 2020YFC2008005; 2018YFC2002405//National Key Research and Development Program of China/ ; 2023YFS0251//Key R&amp;D Project of Sichuan Province/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Dyslipidemias/microbiology/epidemiology ; Male ; Cross-Sectional Studies ; Female ; *Life Style ; Middle Aged ; Adult ; *Metabolic Networks and Pathways ; Feces/microbiology/chemistry ; China ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenome ; Metabolomics ; Triglycerides/blood ; Aged ; }, abstract = {Whether the role of gut microbial features lies in the pathways from lifestyles to dyslipidemia remains unclear. In this cross-sectional study, we conducted a metagenome-wide association analysis and fecal metabolomic profiling in 994 adults from the China Multi-Ethnic cohort. A total of 26 microbial species were identified as mediators between lifestyle factors and risk for dyslipidemia. Specifically, the abundance of [Ruminococcus] gnavus mediated the associations between lifestyles and risks for dyslipidemia, elevated low-density lipoprotein cholesterol, elevated total cholesterol, and elevated triglycerides. [Ruminococcus] gnavus, Alistipes shahii, and Lachnospira eligens were replicated to be associated with dyslipidemia in an external validation cohort. The potential metabolic pathways included arachidonic acid, bile acid, and aromatic amino-acid metabolism.}, }
@article {pmid40436643, year = {2025}, author = {Li, J and Wu, Y and Yang, Y and Chen, L and He, C and Zhou, S and Huang, S and Zhang, X and Wang, Y and Gui, Q and Lu, H and Zhang, Q and Yang, Y}, title = {Metagenomics reveals an increased proportion of an Escherichia coli-dominated enterotype in elderly Chinese people.}, journal = {Journal of Zhejiang University. Science. B}, volume = {26}, number = {5}, pages = {477-492}, pmid = {40436643}, issn = {1862-1783}, support = {82101665, 82271588, 82200665 and 82100795//the National Natural Science Foundation of China/ ; LY22H030009//the Zhejiang Provincial Natural Science Foundation of China/ ; 2023ZL480//the Zhejiang Provincial Science and Technology Program of Traditional Chinese Medicine/ ; 2023RC153//the Medical and Health Research Project of Zhejiang Province/ ; }, mesh = {Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Bacteroides ; China ; Diabetes Mellitus, Type 2/microbiology ; *Escherichia coli/genetics/isolation &amp; purification/classification ; *Gastrointestinal Microbiome/genetics ; *Metagenomics ; East Asian People ; }, abstract = {Gut microbial communities are likely remodeled in tandem with accumulated physiological decline during aging, yet there is limited understanding of gut microbiome variation in advanced age. Here, we performed a metagenomics-based enterotype analysis in a geographically homogeneous cohort of 367 enrolled Chinese individuals between the ages of 60 and 94 years, with the goal of characterizing the gut microbiome of elderly individuals and identifying factors linked to enterotype variations. In addition to two adult-like enterotypes dominated by Bacteroides (ET-Bacteroides) and Prevotella (ET-Prevotella), we identified a novel enterotype dominated by Escherichia (ET-Escherichia), whose prevalence increased in advanced age. Our data demonstrated that age explained more of the variance in the gut microbiome than previously identified factors such as type 2 diabetes mellitus (T2DM) or diet. We characterized the distinct taxonomic and functional profiles of ET-Escherichia, and found the strongest cohesion and highest robustness of the microbial co-occurrence network in this enterotype, as well as the lowest species diversity. In addition, we carried out a series of correlation analyses and co-abundance network analyses, which showed that several factors were likely linked to the overabundance of Escherichia members, including advanced age, vegetable intake, and fruit intake. Overall, our data revealed an enterotype variation characterized by Escherichia enrichment in the elderly population. Considering the different age distribution of each enterotype, these findings provide new insights into the changes that occur in the gut microbiome with age and highlight the importance of microbiome-based stratification of elderly individuals.}, }
@article {pmid40436373, year = {2025}, author = {Vosough, M and Drees, F and Sieber, G and Stach, TL and Beisser, D and Probst, AJ and Boenigk, J and Schmidt, TC}, title = {Integrative Analysis of Nontargeted LC-HRMS and High-Throughput Metabarcoding Data for Aquatic Environmental Studies Using Combined Multivariate Statistical Approaches.}, journal = {Analytical chemistry}, volume = {97}, number = {22}, pages = {11563-11571}, pmid = {40436373}, issn = {1520-6882}, mesh = {Chromatography, Liquid ; Mass Spectrometry ; Multivariate Analysis ; Wastewater/chemistry/analysis ; RNA, Ribosomal, 16S/genetics ; *Water Pollutants, Chemical/analysis ; *High-Throughput Screening Assays ; *DNA Barcoding, Taxonomic ; }, abstract = {Significant progress in high-throughput analytical techniques has paved the way for novel approaches to integrating data sets from different compartments. This study leverages nontarget screening (NTS) via liquid chromatography-high-resolution mass spectrometry (LC-HRMS), a crucial technique for analyzing organic micropollutants and their transformation products, in combination with biological indicators. We propose a combined multivariate data processing framework that integrates LC-HRMS-based NTS data with other high-throughput data sets, exemplified here by 18S V9 rRNA and full-length 16S rRNA gene metabarcoding data sets. The power of data fusion is demonstrated by systematically evaluating the impact of treated wastewater (TWW) over time on an aquatic ecosystem through a controlled mesocosm experiment. Highly compressed NTS data were compiled through the implementation of the region of interest-multivariate curve resolution-alternating least-squares (MCR-ALS) method, known as ROIMCR. By integrating ANOVA-simultaneous component analysis with structural learning and integrative decomposition (SLIDE), the innovative SLIDE-ASCA approach enables the decomposition of global and partial common, as well as distinct variation sources arising from experimental factors and their possible interactions. SLIDE-ASCA results indicate that temporal variability explains a much larger portion of the variance (74.6%) than the treatment effect, with both contributing to global shared space variation (41%). Design structure benefits include enhanced interpretability, improved detection of key features, and a more accurate representation of complex interactions between chemical and biological data. This approach offers a greater understanding of the natural and wastewater-influenced temporal patterns for each data source, as well as reveals associations between chemical and biological markers in an exemplified perturbed aquatic ecosystem.}, }
@article {pmid40435563, year = {2025}, author = {García-Pérez, P and Tomas, M and Giuberti, G and Capanoglu, E and Callegari, ML and Lucini, L and Patrone, V}, title = {Brassica microgreens shape gut microbiota and functional metabolite profiles in a species-related manner: A multi-omics approach following in vitro gastrointestinal digestion and large intestine fermentation.}, journal = {Microbiological research}, volume = {298}, number = {}, pages = {128226}, doi = {10.1016/j.micres.2025.128226}, pmid = {40435563}, issn = {1618-0623}, mesh = {*Gastrointestinal Microbiome/physiology ; *Brassica/metabolism/chemistry ; Fermentation ; Humans ; *Digestion ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; *Intestine, Large/microbiology/metabolism ; Metabolomics ; Metagenomics ; Feces/microbiology ; Fatty Acids, Volatile/metabolism ; Polyphenols/metabolism ; Metabolome ; Isothiocyanates/metabolism ; Multiomics ; }, abstract = {Brassicaceae microgreens constitute a novel and promising source of bioactive compounds, such as polyphenols and glucosinolates. In this work, an integrative computational approach was performed to decipher the interaction between bioaccessible microgreen metabolites and human gut bacteria. To this end, in vitro gastrointestinal digestion and large intestine fermentation were performed on eight different microgreens, which were further subjected to a dual high-throughput approach that combined fecal metagenomics and untargeted metabolomics. Data reveal a significant correlation between Parabacteroides merdae and two isothiocyanates in arugula fermentates, suggesting a high bioaccessibility of these bioactive compounds. Meanwhile, two species of Roseburia were correlated with pseudooxynicotine, an anti-inflammatory catabolite of nicotine in Brassica oleracea fermentates (such as broccoli, Brussels sprouts, and red cabbage), coupled with an increase in short-chain fatty acid production. These findings confer evidence on the nutritional impact of microgreens consumption, revealing the most bioaccessible metabolites with associated health-promoting properties together with their participation in the shaping of gut microbial populations, possibly leading to prebiotic effects.}, }
@article {pmid40434822, year = {2025}, author = {Berelson, MFG and Heavens, D and Nicholson, P and Clark, MD and Leggett, RM}, title = {From air to insight: the evolution of airborne DNA sequencing technologies.}, journal = {Microbiology (Reading, England)}, volume = {171}, number = {5}, pages = {}, pmid = {40434822}, issn = {1465-2080}, mesh = {*High-Throughput Nucleotide Sequencing/methods ; *Air Microbiology ; *Sequence Analysis, DNA/methods ; *DNA, Environmental/genetics/analysis/isolation &amp; purification ; Humans ; Environmental Monitoring/methods ; Computational Biology/methods ; Biodiversity ; }, abstract = {Historically, the analysis of airborne biological organisms relied on microscopy and culture-based techniques. However, technological advances such as PCR and next-generation sequencing now provide researchers with the ability to gather vast amounts of data on airborne environmental DNA (eDNA). Studies typically involve capturing airborne biological material, followed by nucleic acid extraction, library preparation, sequencing and taxonomic identification to characterize the eDNA at a given location. These methods have diverse applications, including pathogen detection in agriculture and human health, air quality monitoring, bioterrorism detection and biodiversity monitoring. A variety of methods are used for airborne eDNA analysis, as no single pipeline meets all needs. This review outlines current methods for sampling, extraction, sequencing and bioinformatic analysis, highlighting how different approaches can influence the resulting data and their suitability for specific use cases. It also explores current applications of airborne eDNA sampling and identifies research gaps in the field.}, }
@article {pmid40434093, year = {2025}, author = {Koldaş, SS and Sezerman, OU and Timuçin, E}, title = {Exploring the role of microbiome in cystic fibrosis clinical outcomes through a mediation analysis.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0019625}, pmid = {40434093}, issn = {2379-5077}, mesh = {*Cystic Fibrosis/microbiology/physiopathology ; Humans ; *Microbiota/genetics ; Sputum/microbiology ; Female ; Male ; RNA, Ribosomal, 16S/genetics ; Adult ; Lung/physiopathology/microbiology ; }, abstract = {UNLABELLED: Human microbiome plays a crucial role in host health and disease by mediating the impact of environmental factors on clinical outcomes. Mediation analysis is a valuable tool for dissecting these complex relationships. However, existing approaches are primarily designed for cross-sectional studies. Modern clinical research increasingly utilizes long follow-up periods, leading to complex data structures, particularly in metagenomic studies. To address this limitation, we introduce a novel mediation framework based on structural equation modeling that leverages linear mixed-effects models using penalized quasi-likelihood estimation with a debiased lasso. We applied this framework to a 16S rRNA sputum microbiome data set collected from patients with cystic fibrosis over 10 years to investigate the mediating role of the microbiome in the relationship between clinical states, disease aggressiveness phenotypes, and lung function. We identified richness as a key mediator of lung function. Specifically, Streptococcus was found to be significantly associated with mediating the decline in lung function on treatment compared to exacerbation, while Gemella was associated with the decline in lung function on recovery. This approach offers a powerful new tool for understanding the complex interplay between microbiome and clinical outcomes in longitudinal studies, facilitating targeted microbiome-based interventions.<br><br>IMPORTANCE: Understanding the mechanisms by which the microbiome influences clinical outcomes is paramount for realizing the full potential of microbiome-based medicine, including diagnostics and therapeutics. Identifying specific microbial mediators not only reveals potential targets for novel therapies and drug repurposing but also offers a more precise approach to patient stratification and personalized interventions. While traditional mediation analyses are ill-equipped to address the complexities of longitudinal metagenomic data, our framework directly addresses this gap, enabling robust investigation of these increasingly common study designs. By applying this framework to a decade-long cystic fibrosis study, we have begun to unravel the intricate relationships between the sputum microbiome and lung function decline across different clinical states, yielding insights that were previously unknown.}, }
@article {pmid40434078, year = {2025}, author = {Weisse, L and Martin, L and Moumen, B and Héchard, Y and Delafont, V}, title = {Environmental diversity of Candidatus Babelota and their relationships with protists.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0026125}, pmid = {40434078}, issn = {2379-5077}, support = {ANR-21-CE02-0001//Agence Nationale de la Recherche/ ; }, mesh = {*Bacteria/genetics/classification/isolation &amp; purification ; Biodiversity ; Phylogeny ; *Eukaryota/genetics/classification ; High-Throughput Nucleotide Sequencing ; Metagenomics ; }, abstract = {Ca. Babelota is a phylum of strictly intracellular bacteria whose representatives are commonly detected in various environments through metagenomics, though their presence, ecology, and biology have never been addressed so far. As a group of strict intracellular, we hypothesize that their presence, occurrence, and abundance heavily depend on their hosts, which are known as heterotrophic protists, based on few described isolates. Here, we conducted a sampling campaign allowing to characterize protists and associated bacterial communities, using high-throughput sequencing. In parallel, a systematic enrichment of protists from samples was performed to attempt characterization and isolation of new Ca. Babelota within native hosts. We found that Ca. Babelota are among the most widespread phylum among the rare ones. Protist enrichments are allowed in certain cases to enrich as well for Ca. Babelota, which could be visualized in vivo infecting protist cells. Though cosmopolitan, Ca. Babelota diversity was highly site-specific. Cooccurrence analyses allowed to retrieve well-known as well as new putative associations involving numerous protists of various trophic regimes. The combination of approaches developed in this study enhances our understanding of Ca. Babelota ecology and biology, while paving the way for future isolation of new members of this elusive phylum, which could have huge impact on protists-and ecosystems-functioning.IMPORTANCEOur understanding of microbial diversity surrounding us and colonizing the environment has been dramatically impacted by the advent of DNA-based analyses. Such progress helped shine a new light on numerous lineages of yet-to-be-characterized microbes, whose ecology and biology are basically unknown. Among those uncharacterized clades is the Candidatus Babelota, a bacterial phylum for which parasitism seems to be an ancestral trait. All known Ca. Babelota thrive by infecting phagotrophic protist hosts, thereby impacting this basal link of the trophic chain. The Ca. Babelota constitutes a model that stands out, as phylum-wide conserved parasitism has only been described in one previous occurrence for Bacteria, with the Chlamydiota. Thus, exploring the intricate interplay between Ca. Babelota and their protist hosts will advance our knowledge of bacterial diversity, their ecology, and global impact on ecosystem functioning.}, }
@article {pmid40433668, year = {2025}, author = {von Ameln Lovison, O and Zempulski Volpato, FC and Weber, LG and Barth, AL and Simon Coitinho, A and Martins, AF}, title = {Unveiling the role of the upper respiratory tract microbiome in susceptibility and severity to COVID-19.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1531084}, pmid = {40433668}, issn = {2235-2988}, mesh = {Humans ; *COVID-19/microbiology/pathology/virology ; Cross-Sectional Studies ; Disease Susceptibility ; *Microbiota ; SARS-CoV-2 ; Female ; Male ; Severity of Illness Index ; Middle Aged ; *Respiratory System/microbiology ; Metagenomics ; Bacteria/classification/genetics/isolation &amp; purification ; Adult ; Biomarkers ; Aged ; }, abstract = {It is argued that commensal bacteria in the upper respiratory tract (URT) protect against pathogen colonization and infection, including respiratory viruses. Given that the microbiome can mediate immune modulation, a link between the URT microbiome (URTM) and COVID-19 susceptibility and severity is expected. This 16S metagenomics cross-sectional study assessed URTM composition, metabolic prediction, and association with laboratory biomarkers in non-COVID-19 pneumonia (NO-CoV), moderate (M-CoV), severe (S-CoV) COVID-19 patients, as well as COVID-19-negative, asymptomatic (NC) patients. The S-CoV group exhibited reduced URTM diversity, primarily due to a decreased abundance of eubiotic taxa. Some of these taxa (e.g., Haemophilus sp., Neisseria sp.) were also associated with inflammatory biomarkers. Multiple metabolic pathways (e.g., short-chain fatty acids, vitamin B12) linked to immune response, antiviral activity, and host susceptibility showed decreased abundance in S-CoV. These pathways could suggest potential alternatives for the therapeutic arsenal against COVID-19, providing reassurance about the progress in understanding and treating this disease.}, }
@article {pmid40431358, year = {2025}, author = {Yue, Y and Yang, HJ and Li, C and Ryu, MS and Seo, JW and Jeong, DY and Park, S}, title = {Beneficial Effects of Traditional Fermented Soybean Sauce (Kanjang) on Memory Function, Body Water, and Glucose Metabolism: Roles of Gut Microbiota and Neuroinflammation.}, journal = {Nutrients}, volume = {17}, number = {10}, pages = {}, pmid = {40431358}, issn = {2072-6643}, support = {2023-3//functional research of fermented soybean food (safety monitoring)" under the Ministry of Agriculture, Food and Rural Affairs/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/physiology ; Male ; Rats, Sprague-Dawley ; *Soy Foods/microbiology ; Rats ; *Memory/drug effects ; *Neuroinflammatory Diseases ; *Glucose/metabolism ; Scopolamine ; *Fermented Foods ; Water/metabolism ; Neuroprotective Agents/pharmacology ; *Glycine max ; Fermentation ; }, abstract = {Background: Traditional fermented soybean foods, acting as potential synbiotics, may help mitigate cognitive impairment associated with amnesia. This study investigated the neuroprotective effects of four kanjang (Korean fermented soy sauce) varieties and their underlying mechanisms. Methods: Male Sprague Dawley rats (n = 70) were divided into seven groups: normal control, scopolamine control, positive control (1 mg/kg bw/day of donepezil), and four scopolamine-treated groups receiving different kanjang varieties (0.5% in high-fat diet). Based on their Bacillus content, the kanjang samples were categorized as traditionally made kanjang (TMK) with high Bacillus (SS-HB), TMK with medium Bacillus (SS-MB), TMK with low Bacillus (SS-LB), and factory-made kanjang (SS-FM). Results: Scopolamine administration disrupted energy, glucose, and water metabolism and impaired memory function (p < 0.05). All kanjang treatments improved insulin sensitivity, reduced inflammation, enhanced glucose tolerance, and decreased visceral fat. SS-MB, SS-HB, and SS-FM increased skeletal muscle mass. They maintained body water homeostasis by suppressing the renin-angiotensin-aldosterone system. Kanjang treatments improved memory function, with SS-FM showing the least significant effects. The treatments reduced neuronal cell death in the hippocampal CA1 region, decreased acetylcholinesterase activity, and increased brain-derived neurotrophic factor mRNA expression. Gut microbiota analysis revealed that kanjang treatments increased Lactobacillaceae and decreased Lachnospiraceae, with SS-HB and SS-LB specifically elevating Ligilactobacillus. Metagenomic analysis demonstrated enhanced glycolysis/gluconeogenesis pathways and enhanced butanoate metabolism while reducing lipopolysaccharide biosynthesis and pro-inflammatory signaling. SS-MB and SS-LB increased intestinal goblet cell counts and the serum butyrate concentration. Conclusions: These findings suggest that kanjang consumption, particularly SS-HB and SS-LB varieties, can ameliorate memory impairment in this murine model through multiple mechanisms: metabolic improvements, enhanced neurotrophic signaling, gut microbiota modulation, and reduced neuroinflammation via gut-brain axis activation. Human clinical trials are warranted to determine if these promising neuroprotective effects translate to clinical applications.}, }
@article {pmid40431158, year = {2025}, author = {Mirete, S and Sánchez-Costa, M and Díaz-Rullo, J and González de Figueras, C and Martínez-Rodríguez, P and González-Pastor, JE}, title = {Metagenome-Assembled Genomes (MAGs): Advances, Challenges, and Ecological Insights.}, journal = {Microorganisms}, volume = {13}, number = {5}, pages = {}, pmid = {40431158}, issn = {2076-2607}, support = {PID2021-126114NB-C43//Spanish Ministry of Science and Innovation which also included European Regional Development Fund (FEDER)/ ; }, abstract = {Metagenome-assembled genomes (MAGs) have revolutionized microbial ecology by enabling the genome-resolved study of uncultured microorganisms directly from environmental samples. By leveraging high-throughput sequencing, advanced assembly algorithms, and genome binning techniques, researchers can reconstruct microbial genomes without the need for cultivation. These methodological advances have expanded the known microbial diversity, revealing novel taxa and metabolic pathways involved in key biogeochemical cycles, including carbon, nitrogen, and sulfur transformations. MAG-based studies have identified microbial lineages form Archaea and Bacteria responsible for methane oxidation, carbon sequestration in marine sediments, ammonia oxidation, and sulfur metabolism, highlighting their critical roles in ecosystem stability. From a sustainability perspective, MAGs provide essential insights for climate change mitigation, sustainable agriculture, and bioremediation. The ability to characterize microbial communities in diverse environments, including soil, aquatic ecosystems, and extreme habitats, enhances biodiversity conservation and supports the development of microbial-based environmental management strategies. Despite these advancements, challenges such as assembly biases, incomplete metabolic reconstructions, and taxonomic uncertainties persist. Continued improvements in sequencing technologies, hybrid assembly approaches, and multi-omics integration will further refine MAG-based analyses. As methodologies advance, MAGs will remain a cornerstone for understanding microbial contributions to global biogeochemical processes and developing sustainable interventions for environmental resilience.}, }
@article {pmid40431145, year = {2025}, author = {Jiang, K and Ye, L and Cao, C and Che, G and Wang, Y and Hong, Y}, title = {Multi-Metagenome Analysis Unravels Community Collapse After Sampling and Hints the Cultivation Strategy of CPR Bacteria in Groundwater.}, journal = {Microorganisms}, volume = {13}, number = {5}, pages = {}, pmid = {40431145}, issn = {2076-2607}, support = {32360005//National Natural Science Foundation of China/ ; 2022JBQN091//Fundamental Research Funds for the Inner Mongolia Normal University/ ; 2022JBTD010//Fundamental Research Funds for the Inner Mongolia Normal University/ ; }, abstract = {Groundwater harbors phylogenetically diverse Candidate Phyla Radiation (CPR) bacteria, representing an ideal ecosystem for studying this microbial dark matter. However, no CPR strains have been successfully isolated from groundwater, severely limiting further research. This study employed a multi-metagenome approach, integrating time-resolved sampling, antibiotic/nutrient interventions, and microbial correlation networks to unravel CPR ecological roles in groundwater and provide insights into their subsequent cultivation. Through 36 metagenomes from a groundwater system containing at least 68 CPR phyla, we revealed the time-sensitive collapse of CPR communities: total abundance plummeted from 7.9% to 0.15% within 48 h post-sampling, driven by competition with rapidly dividing non-CPR bacteria, such as members of Pseudomonadota. Ampicillin (100 mg/L) stabilized CPR communities by suppressing competitors, whereas low-nutrient conditions paradoxically reversed this effect. Long-term enrichment (14 months) recovered 63 CPR phyla (0.35% abundance), revealing their survival resilience despite nutrient deprivation. Correlation networks prioritized Actinomyces, a novel Acidimicrobiaceae genus, Aestuariivirga, Baekduia and Caedimonadaceae as potential CPR partners, providing actionable targets for co-culture trials. Here, we propose actionable recommendations spanning groundwater sampling, activation status, identification of CPR symbiotic partners, and optimization of culture conditions, which bypass traditional blind cultivation and are critical for future efforts to cultivate CPR bacterial strains from groundwater. Cultivating CPR bacteria will contribute to clarifying their diversity, ecological roles, evolutionary mechanisms, metabolic pathways, and genetic potential.}, }
@article {pmid40431076, year = {2025}, author = {Mendybayeva, A and Makhambetov, A and Yanin, K and Taskuzhina, A and Khusnitdinova, M and Gritsenko, D}, title = {Metagenomic Analysis of Wild Apple (Malus sieversii) Trees from Natural Habitats of Kazakhstan.}, journal = {Plants (Basel, Switzerland)}, volume = {14}, number = {10}, pages = {}, pmid = {40431076}, issn = {2223-7747}, support = {BR21882269//The Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; }, abstract = {Kazakhstan's rich biodiversity includes diverse apple populations, notably the wild apple tree (Malus sieversii) prized for traits like disease resistance and adaptability, potentially aiding breeding programs. Analyzing their microbiomes offers insights into bacterial diversity and how it influences apple tree development, making it a reliable method for understanding ecological interactions. In this research, 334 apple tree samples were collected from different mountain ranges in southeastern Kazakhstan. An analysis using nanopore-based 16S rRNA sequencing showed a distinct similarity in the microbiome compositions of samples from the Zhongar and Ile Alatau mountain ranges, with a predominance of Pseudomonadaceae, Enterobacteriaceae, and Microbacteriaceae. In contrast, samples from Ketmen ridge showed a higher prevalence of Enterobacteriaceae. Alongside the less represented Pseudomonadaceae family, in the Ketmen ridge region, bacteria of the Xanthomonadaceae, Alcaligenaceae, and Brucellaceae families were also present. Across all regions, beneficial plant-associated bacteria were identified, such as Pseudomonas veronii, Stenotrophomonas geniculata, and Kocuria rhizophila, potentially enhancing plant resilience. However, opportunistic phytopathogens were also detected, including Pseudomonas viridiflava and Serratia marcescens, particularly in the Ile Alatau region. These findings highlight the complex microbial interactions in M. sieversii, thus offering key insights into host-microbe relationships that can inform apple breeding and ecological preservation efforts.}, }
@article {pmid40429958, year = {2025}, author = {San-Martin, MI and Chamizo-Ampudia, A and Sanchiz, &#xc1; and Ferrero, M&#xc1; and Martínez-Blanco, H and Rodríguez-Aparicio, LB and Navasa, N}, title = {Microbiome Markers in Gastrointestinal Disorders: Inflammatory Bowel Disease, Colorectal Cancer, and Celiac Disease.}, journal = {International journal of molecular sciences}, volume = {26}, number = {10}, pages = {}, pmid = {40429958}, issn = {1422-0067}, mesh = {Humans ; *Celiac Disease/microbiology/metabolism ; *Inflammatory Bowel Diseases/microbiology/metabolism ; *Gastrointestinal Microbiome ; Biomarkers/metabolism ; *Colorectal Neoplasms/microbiology/metabolism ; Animals ; Metagenomics/methods ; }, abstract = {Intestinal microbiota and the host's immune system form a symbiotic alliance that sustains normal development and function in the human gut. Changes such as dietary habits among societies in developed countries have led to the development of unbalanced microbial populations in the gut, likely contributing to the dramatic increase in inflammatory diseases in the last few decades. Recent advances in DNA sequencing technologies have tremendously helped to characterize the microbiome associated with disease, both in identifying global alterations and discovering specific biomarkers that potentially contribute to disease pathogenesis, as evidenced by animal studies. Beyond bacterial alterations, non-bacterial components such as fungi, viruses, and microbial metabolites have been implicated in these diseases, influencing immune responses and gut homeostasis. Multi-omics approaches integrating metagenomics, metabolomics, and transcriptomics offer a more comprehensive understanding of the microbiome's role in disease pathogenesis, paving the way for innovative diagnostic and therapeutic strategies. Unraveling the metagenomic profiles associated with disease may facilitate earlier diagnosis and intervention, as well as the development of more personalized and effective therapeutic strategies. This review synthesizes recent and relevant microbiome research studies aimed at characterizing the microbial signatures associated with inflammatory bowel disease, colorectal cancer, and celiac disease.}, }
@article {pmid40428846, year = {2025}, author = {Torraco, A and Di Nicolantonio, S and Cardisciani, M and Ortu, E and Pietropaoli, D and Altamura, S and Del Pinto, R}, title = {Meta-Analysis of 16S rRNA Sequencing Reveals Altered Fecal but Not Vaginal Microbial Composition and Function in Women with Endometriosis.}, journal = {Medicina (Kaunas, Lithuania)}, volume = {61}, number = {5}, pages = {}, pmid = {40428846}, issn = {1648-9144}, support = {SRA-882725/CCF/CCF/United States ; }, mesh = {Humans ; Female ; *Endometriosis/microbiology/physiopathology ; *Feces/microbiology ; *Vagina/microbiology ; *RNA, Ribosomal, 16S/analysis/genetics ; Dysbiosis/microbiology ; Adult ; Gastrointestinal Microbiome ; Metagenomics/methods ; }, abstract = {Background and Objectives: Dysbiosis of the oral-gut axis is related to several extraintestinal inflammatory diseases, including endometriosis. This study aims to assess the microbial landscape and pathogenic potential of distinct biological niches during endometriosis. Materials and Methods: A microbiome meta-analysis was conducted on 182 metagenomic sequences (79 of fecal and 103 of vaginal origin) from women with and without endometriosis. Fecal and vaginal microbial diversity, differential abundance, and functional analysis based on disease status were assessed. Random forest, gradient boosting, and generalized linear modeling were used to predict endometriosis based on differentially enriched bacteria. Results: Only intestinal microbes displayed distinctive taxonomic and functional characteristics in women with endometriosis compared to control women. Taxonomic differences were quantified using the microbial endometriosis index (MEI), which effectively distinguished between individuals with and without the disease. The observed functional enrichment pointed to proinflammatory pathways previously related to endometriosis development. Conclusions: Dysbiosis in the oral-gut microbial community appears to play a prevalent role in endometriosis. Our findings pave the ground for future studies exploring the potential mechanistic involvement of the oral-gut axis in disease pathogenesis.}, }
@article {pmid40428372, year = {2025}, author = {Dimitrova, L and Ilieva, Y and Gouliamova, D and Kussovski, V and Hubenov, V and Georgiev, Y and Bratanova, T and Kaleva, M and Zaharieva, MM and Najdenski, H}, title = {Isolation, Enrichment and Analysis of Aerobic, Anaerobic, Pathogen-Free and Non-Resistant Cellulose-Degrading Microbial Populations from Methanogenic Bioreactor.}, journal = {Genes}, volume = {16}, number = {5}, pages = {}, pmid = {40428372}, issn = {2073-4425}, support = {&#x41a;P-06-N71/8 from 08.12.2023//National Fund for Scientific Research, Republic of Bulgaria/ ; }, mesh = {*Cellulose/metabolism ; *Bioreactors/microbiology ; Anaerobiosis ; *Microbial Consortia/genetics ; Biodegradation, Environmental ; Bacteria/genetics/isolation &amp; purification/metabolism ; Aerobiosis ; *Bacteria, Anaerobic/genetics/isolation &amp; purification/metabolism ; Methane/metabolism ; Biofuels ; }, abstract = {Background: Nowadays, the microbial degradation of cellulose represents a new perspective for reducing cellulose waste from industry and households and at the same time obtaining energy sources. Methods: We isolated and enriched two aerobic (at 37 °C and 50 °C) and one anaerobic microbial consortium from an anaerobic bioreactor for biogas production by continuous subculturing on peptone cellulose solution (PCS) medium supplemented with 0.3% treated or untreated Whatman filter paper under static conditions. Samples were taken every 7 days until day 21 to determine the percentage of cellulose biodegradation. We determined the antimicrobial resistance of aerobic and anaerobic consortia and some single colonies by disc diffusion method, against 42 clinically applied antibiotics. PCR analyses were performed to search for the presence of eight genes for cellulolytic activity and nine genes for antibiotic resistance. By metagenomics analysis, the bacterial and fungal genus distributions in the studied populations were determined. Results: Aerobes cultured at 50 °C degraded cellulose to the greatest extent (47%), followed by anaerobes (24-38%) and aerobes (8%) cultured at 37 °C. The bacterial sequence analysis showed that the dominant phyla are Bacillota and Bacteroidetes and genera-Paraclostridium, Defluvitalea, Anaerobacillus, Acetivibrio, Lysinibacillus, Paenibacillus, Romboutsia, Terrisporobacter, Clostridium, Sporanaerobacter, Lentimicrobium, etc. in a different ratio depending on the cultivation conditions and the stage of the process. Some of these representatives are cellulolytic and hemicellulolytic microorganisms. We performed lyophilization and proved that it is suitable for long-term storage of the most active consortium, which degrades even after the 10th re-inoculation for a period of one year. We proved the presence of ssrA, ssrA BS and blaTEM genes. Conclusions: Our findings demonstrated the potential utility of the microbial consortium of anaerobes in the degradation of waste lignocellulose biomass.}, }
@article {pmid40428326, year = {2025}, author = {Sun, YF and Han, ZX and Yao, XK and Meng, J and Ren, WL and Wang, CK and Yuan, XX and Zeng, YQ and Wang, YF and Sun, ZW and Wang, JW}, title = {Effects of Different Stages of Training on the Intestinal Microbes of Yili Horses Analyzed Using Metagenomics.}, journal = {Genes}, volume = {16}, number = {5}, pages = {}, pmid = {40428326}, issn = {2073-4425}, mesh = {Animals ; Horses/microbiology ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; Feces/microbiology ; *Physical Conditioning, Animal ; *Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {Objectives: The aim of this study was to investigate the effects of different stages of training on the intestinal microbial abundance of Yili horses. Methods: Ten Yili horses, all aged 2 years old and weighing 305 ± 20 kg, were selected and divided into a training group and an untrained group. The training group performed riding training 6 days a week, and the untrained group moved freely in the activity circle every day. Fecal samples were collected on days 30 and 60, and the intestinal microorganisms were detected and analyzed using metagenomics. Results: Compared with the 30-day untrained group, the relative abundances of Bacteroidetes were significantly increased in the 30-day training group (p < 0.01). Conversely, the abundances of Clostridiaceae, Clostridium, and Ruminococcus were significantly decreased (p < 0.01), whereas those of Prevotella, Bacteroideaceae, and Bacteroidetes were significantly increased (p < 0.05). Additionally, the relative abundances of Firmicutes and Actinomycetes were significantly decreased (p < 0.05). Compared with the 60-day untrained group, no significant differences in the phyla Bacteriaceae and Bacteriae of the 60-day training group (p > 0.05) were observed. In the linear discriminant analysis effect size analysis, seven significantly different bacteria were detected in the fecal flora of horses in the 30-day training group versus the untrained 30-day group, but only one significantly different bacterium was detected after 60 days. The Kyoto Encyclopedia of Genes and Genomes analysis showed that the differentially expressed genes were related to metabolism and the environmental information processing pathway, carbohydrate metabolism, and membrane transport pathways. Conclusions: Therefore, training seems to affect the diversity and composition of the gut microbiota of Yili horses, especially during the first 30 days of training.}, }
@article {pmid40428305, year = {2025}, author = {Guo, Q and Zhang, W and Xu, C and Li, X and Wang, B and Xiong, C and Duan, W and Luo, T and Wang, W and Zhou, J}, title = {Comparative Analysis of Gut Microbiome Community Structures in Different Populations of Asian Elephants in China and Their Correlation with Diet.}, journal = {Genes}, volume = {16}, number = {5}, pages = {}, pmid = {40428305}, issn = {2073-4425}, support = {202501AS070053//Key Project of Yunnan Basic Research Program/ ; }, mesh = {Animals ; *Elephants/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; *Diet ; China ; Metagenomics/methods ; Bacteria/genetics/classification ; }, abstract = {BACKGROUND: The interaction and co-evolution between the gut microbiome and the host play important roles in the host's physiology, nutrition, and health. Diet is considered an important driver of differences in the gut microbiota; however, research on the relationship between the gut microbiota and diet in Asian elephants remains limited.<br><br>METHODS: In this study, we explored the gut microbiota structure and its relationship with diet in different populations of Asian elephants through metagenomic sequencing, combined with previously published dietary data.<br><br>RESULTS: This study found that the dominant gut microbiota of Asian elephants includes the phyla Bacillota (29.85% in BP, 22.79% in RC, 21.89% in SM, 31.67% in ML, and 33.00% in NGH), Bacteroidota (25.25% in BP, 31.44% in RC, 16.44% in SM, 25.73% in ML, and 23.74% in NGH), and Spirochaetota (3.49% in BP, 6.18% in RC, 1.71% in SM, 2.69% in ML, and 3.52% in NGH), with significant differences in the gut microbiota among different populations. Correlation analysis between the gut microbiota and diet revealed that dietary diversity did not directly affect the alpha diversity of the gut microbiota. However, specific food types might play a key role in shaping the gut microbiota structure by regulating the abundance of certain microbiota.<br><br>CONCLUSIONS: This study reveals significant differences in the gut microbiota structure among different populations of Asian elephants and explores the impact of diet on the structure. The results provide foundational data for a deeper understanding of the gut microbiota structure of Asian elephants and offer important references for the scientific conservation and precise management strategies of this species.}, }
@article {pmid40427823, year = {2025}, author = {Santos, AFB and Nunes, M and Filipa-Silva, A and Pimentel, V and Pingarilho, M and Abrantes, P and Miranda, MNS and Crespo, MTB and Abecasis, AB and Parreira, R and Seabra, SG}, title = {Wastewater Metavirome Diversity: Exploring Replicate Inconsistencies and Bioinformatic Tool Disparities.}, journal = {International journal of environmental research and public health}, volume = {22}, number = {5}, pages = {}, pmid = {40427823}, issn = {1660-4601}, support = {PTDC/CTA AMB/29586/2017//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e Tecnologia, Portugal 568 through projects AgriWWAter/ ; 706, Internalproject IBETXplore 2017//VirusFreeWater/ ; GHTM- UID/04413/2020//Internal exploratory Project WasteWaterVir/ ; LA/P/0117/2020//LA-REAL/ ; }, mesh = {*Wastewater/virology ; *Computational Biology/methods ; *Virome ; Portugal ; *Metagenomics/methods ; *Viruses/classification/isolation &amp; purification/genetics ; }, abstract = {This study investigates viral composition in wastewater through metagenomic analysis, evaluating the performance of four bioinformatic tools-Genome Detective, CZ.ID, INSaFLU-TELEVIR and Trimmomatic + Kraken2-on samples collected from four sites in each of two wastewater treatment plants (WWTPs) in Lisbon, Portugal in April 2019. From each site, we collected and processed separately three replicates and one pool of nucleic acids extracted from the replicates. A total of 32 samples were processed using sequence-independent single-primer amplification (SISPA) and sequenced on an Illumina MiSeq platform. Across the 128 sample-tool combinations, viral read counts varied widely, from 3 to 288,464. There was a lack of consistency between replicates and their pools in terms of viral abundance and diversity, revealing the heterogeneity of the wastewater matrix and the variability in sequencing effort. There was also a difference between software tools highlighting the impact of tool selection on community profiling. A positive correlation between crAssphage and human pathogens was found, supporting crAssphage as a proxy for public health surveillance. A custom Python pipeline automated viral identification report processing, taxonomic assignments and diversity calculations, streamlining analysis and ensuring reproducibility. These findings emphasize the importance of sequencing depth, software tool selection and standardized pipelines in advancing wastewater-based epidemiology.}, }
@article {pmid40427639, year = {2025}, author = {DeSantis, AH and Buss, K and Coker, KM and Pasternak, BA and Chi, J and Patterson, JS and Gu, H and Jurutka, PW and Sandrin, TR}, title = {Multiomics-Based Profiling of the Fecal Microbiome Reveals Potential Disease-Specific Signatures in Pediatric IBD (PIBD).}, journal = {Biomolecules}, volume = {15}, number = {5}, pages = {}, pmid = {40427639}, issn = {2218-273X}, support = {GR39923//Phoenix Children's Hospital Foundation Leadership Grant/ ; }, mesh = {Humans ; Child ; *Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Metagenomics/methods ; *Inflammatory Bowel Diseases/microbiology/metabolism/genetics ; Metabolomics/methods ; Adolescent ; *Colitis, Ulcerative/microbiology/genetics/metabolism ; *Crohn Disease/microbiology/genetics/metabolism ; Biomarkers/metabolism ; Transcriptome ; Multiomics ; }, abstract = {Inflammatory bowel disease (IBD), which includes Crohn's Disease (CD) and Ulcerative Colitis (UC), is a chronic gastrointestinal (GI) disorder affecting 1 in 100 people in the United States. Pediatric IBD (PIBD) is estimated to impact 15 per 100,000 children in North America. Factors such as the gut microbiome (GM), genetic predisposition to the disease, and certain environmental factors are thought to be involved in pathogenesis. However, the pathophysiology of IBD is incompletely understood, and diagnostic biomarkers and effective treatments, particularly for PIBD, are limited. Recent work suggests that these factors may interact to influence disease development, and multiomic approaches have emerged as promising tools to elucidate the pathophysiology. We employed metagenomics, metabolomics- and metatranscriptomics-based approaches to examine the microbiome, its genetic potential, and its activity to identify factors associated with PIBD. Metagenomics-based analyses revealed pathways such as octane oxidation and glycolysis that were differentially expressed in UC patients. Additionally, metatranscriptomics-based analyses suggested enrichment of glycan degradation and two component systems in UC samples as well as protein processing in the endoplasmic reticulum, ribosome, and protein export in CD and UC samples. In addition, metabolomics-based approaches revealed patterns of differentially abundant metabolites between healthy and PIBD individuals. Interestingly, overall microbiome community composition (as measured by alpha and beta diversity indices) did not appear to be associated with PIBD. However, we observed a small number of differentially abundant taxa in UC versus healthy controls, including members of the Classes Gammaproteobacteria and Clostridia as well as members of the Family Rikenellaceae. Accordingly, when identifying potential biomarkers for PIBD, our results suggest that multiomics-based approaches afford enhanced potential to detect putative biomarkers for PIBD compared to microbiome community composition sequence data alone.}, }
@article {pmid40426500, year = {2025}, author = {Tóth, AG and Tóth, DL and Remport, L and Tóth, I and Németh, T and Dubecz, A and Patai, &#xc1;V and Wagenhoffer, Z and Makrai, L and Solymosi, N}, title = {A One Health Approach Metagenomic Study on Antimicrobial Resistance Traits of Canine Saliva.}, journal = {Antibiotics (Basel, Switzerland)}, volume = {14}, number = {5}, pages = {}, pmid = {40426500}, issn = {2079-6382}, support = {SRF-001//University of Veterinary Medicine Budapest/ ; 874735 (VEO)//European Union's Horizon 2020/ ; 2024-2.1.2-EK&#xd6;P-2024-00018//Ministry of Culture and Innovation of Hungary/ ; }, abstract = {Background: According to the One Health concept, the physical proximity between pets and their owners facilitates the interspecies spread of bacteria including those that may harbor numerous antimicrobial resistance genes (ARGs). Methods: A shotgun sequencing metagenomic data-based bacteriome and resistome study of 1830 canine saliva samples was conducted considering the subsets of ARGs with higher public health risk, ESKAPE pathogen relatedness (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Enterobacter species), and survey results on the physical and behavioral characteristics of the participating dogs. Results: A total of 318 ARG types achieved sufficiently high detection rates. These ARGs can affect 31 antibiotic drug classes through various resistance mechanisms. ARGs against tetracyclines, cephalosporins, and, interestingly, peptides appeared in the highest number of samples. Other Critically Important Antimicrobials (CIAs, WHO), such as aminoglycosides, fluoroquinolones, or macrolides, were among the drug classes most frequently affected by ARGs of higher public health risk and ESKAPE pathogen-related ARGs of higher public health risk. Several characteristics, including coat color, sterilization status, size, activity, or aggressiveness, were associated with statistically significant differences in ARG occurrence rates (p < 0.0500). Conclusions: Although the oral microbiome of pet owners is unknown, the One Health and public health implications of the close human-pet bonds and the factors potentially underlying the increase in salivary ARG numbers should be considered, particularly in light of the presence of ARGs affecting critically important drugs for human medicine.}, }
@article {pmid40426336, year = {2025}, author = {Wang, Y and Zhou, K and Zhang, Y and Li, C and Zhang, Y and Ren, X and Mi, C and Ma, L and Duan, Y and Liu, M and Ping, G and Tian, X and Song, Z}, title = {The Systemic Impact of Helicobacter pylori Infection on the Microbiome of Whole Digestive Tract Based on Mucosal, Gastric Juice, and Fecal Specimens.}, journal = {Helicobacter}, volume = {30}, number = {3}, pages = {e70047}, doi = {10.1111/hel.70047}, pmid = {40426336}, issn = {1523-5378}, support = {82170562//National Natural Science Foundation of China/ ; 7232199//Beijing Natural Science Foundation/ ; BYSYZD2023008//Key Clinical Projects of Peking University Third Hospital/ ; }, mesh = {Humans ; *Feces/microbiology ; Cross-Sectional Studies ; *Helicobacter Infections/microbiology ; Male ; Middle Aged ; Female ; *Gastric Juice/microbiology ; Adult ; *Helicobacter pylori/physiology ; RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome ; Bacteria/classification/genetics/isolation &amp; purification ; Aged ; *Gastrointestinal Tract/microbiology ; Dysbiosis/microbiology ; Metagenomics ; }, abstract = {BACKGROUND: Recent studies have found that in addition to directly impacting the gastric microbiome, Helicobacter pylori (H. pylori) infection may cause intestinal microbial dysbiosis. However, most existing studies on the influence of H. pylori infection on the intestinal microbiome used fecal specimens with inconsistent conclusions. Only one limited study on 8 H. pylori-infected patients has previously assessed the impact of H. pylori infection on the microbiome of the entire gastrointestinal tract, finding no significant effect on the bacterial composition of the lower gastrointestinal tract.<br><br>METHODS: This single-center cross-sectional study collected mucosa of the esophagus, stomach, small intestine, and colon, as well as gastric juice and feces from 120 participants of the H. pylori-infected group (HIG) and 30 of the healthy control group (HCG). 16S rRNA sequencing was applied to analyze the bacterial composition and functional pathways, and metagenomics was adopted to assess the composition of viruses, eukaryotes, and archaea in the feces, as well as the antibiotic resistance gene (ARG) and virulence factors of bacteria (VF).<br><br>RESULTS: Compared with the HCG, the alpha and beta diversity of bacteria in the mucosa of the whole digestive tract and the gastric juice of the HIG showed significant changes, with increased microbial dysbiosis index and significantly different compositions at the phylum and genus levels. Functional pathway analysis revealed that the metabolic characteristics of the flora changed in the HIG, with site-specific differences. Fecal specimens demonstrated no significant differences in the above indicators between the two groups. In addition, feces-based metagenomic analysis revealed that only eukaryotes had higher diversity in the HIG, whereas viruses and archaea showed no significant changes; the Shannon index of ARG increased; and VF showed no significant change.<br><br>CONCLUSIONS: This study revealed that H. pylori infection significantly influenced the diversity, composition, and metabolic functional pathway of bacteria in different parts of the digestive tract and the gastric juice. Moreover, fecal microbial composition may not fully represent the mucosal microbial composition of the gastrointestinal tract.<br><br>TRIAL REGISTRATION: Chinese Clinical Trial Registry: ChiCTR2300073419.}, }
@article {pmid40424445, year = {2025}, author = {Li, W and Cai, J and Chen, G and Liu, Y and Wu, X and Bai, Y and Wu, Y and Wang, T}, title = {Microbial community succession mediated by planting patterns in the Loess Plateau, China: Implications for ecological restoration.}, journal = {PloS one}, volume = {20}, number = {5}, pages = {e0324786}, pmid = {40424445}, issn = {1932-6203}, mesh = {*Soil Microbiology ; China ; Soil/chemistry ; *Microbiota ; Forests ; Ecosystem ; *Environmental Restoration and Remediation ; }, abstract = {Microbial community succession plays a key role in restoring fragile ecosystems and mitigating ecological degradation. However, the mechanisms by which vegetation restoration promotes ecological restoration and microbial community reconstruction in degraded soils remain unclear. This study utilized metagenomic high-throughput sequencing technology to analyze microbial community dynamics in soil samples collected from eight different planting patterns in the ecologically degraded areas of the Chinese Loess Plateau. The results indicated significant effects of terrain location and restorative cropping patterns on soil microbial abundance and function. In particular, soil C and N nutrient abundance was highest in mixed forest soils, and the total number of microorganisms was highest and more diverse. Therefore, through vegetation restoration, mixed forests significantly enhanced regional ecological functions. Notably, creating mixed forests with both trees and shrubs resulted in optimal ecological functions, providing a valuable direction for vegetation construction and structural optimization in the region.}, }
@article {pmid40424276, year = {2025}, author = {Goldman, M and Zhao, C and Pollard, KS}, title = {Improved detection of microbiome-disease associations via population structure-aware generalized linear mixed effects models (microSLAM).}, journal = {PLoS computational biology}, volume = {21}, number = {5}, pages = {e1012277}, pmid = {40424276}, issn = {1553-7358}, support = {R01 HL160862/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; Inflammatory Bowel Diseases/microbiology/genetics ; Metagenomics/methods ; *Gastrointestinal Microbiome/genetics ; *Microbiota/genetics ; Computational Biology/methods ; Linear Models ; Metagenome/genetics ; }, abstract = {Microbiome association studies typically link host disease or other traits to summary statistics measured in metagenomics data, such as diversity or taxonomic composition. But identifying disease-associated species based on their relative abundance does not provide insight into why these microbes act as disease markers, and it overlooks cases where disease risk is related to specific strains with unique biological functions. To bridge this knowledge gap, we developed microSLAM, a mixed-effects model and an R package that performs association tests that connect host traits to the presence/absence of genes within each microbiome species, while accounting for strain genetic relatedness across hosts. Traits can be quantitative or binary (such as case/control). MicroSLAM is fit in three steps for each species. The first step estimates population structure across hosts. Step two calculates the association between population structure and the trait, enabling detection of species for which a subset of related strains confer risk. To identify specific genes whose presence/absence across diverse strains is associated with the trait, step three models the trait as a function of gene occurrence plus random effects estimated from step two. Applying microSLAM to 710 gut metagenomes from inflammatory bowel disease (IBD) samples, we discovered 56 species whose population structure correlates with IBD, meaning that different lineages are found in cases versus controls. After controlling for population structure, 20 species had genes significantly associated with IBD. Twenty-one of these genes were more common in IBD patients, while 32 genes were enriched in healthy controls, including a seven-gene operon in Faecalibacterium prausnitzii that is involved in utilization of fructoselysine from the gut environment. The vast majority of species detected by microSLAM were not significantly associated with IBD using standard relative abundance tests. These findings highlight the importance of accounting for within-species genetic variation in microbiome studies.}, }
@article {pmid40423870, year = {2025}, author = {Zhang, M and Zhang, H and Hong, A and Huang, J and Yang, L and Long, Y and Yu, Z}, title = {Dynamic changes of dental plaque and saliva microbiota in OSCC progression.}, journal = {Clinical oral investigations}, volume = {29}, number = {6}, pages = {314}, pmid = {40423870}, issn = {1436-3771}, support = {32170071//This work was funded by the National Natural Science Foundation of China/ ; 82273466//This work was funded by the National Natural Science Foundation of China/ ; 2023ZJ1120//Hunan Provincial Science and Technology Department/ ; 2024JJ2039//Natural Science Foundation of Hunan Province/ ; 2024JJ8117//Natural Science Foundation of Hunan Province/ ; }, mesh = {Humans ; *Saliva/microbiology ; Disease Progression ; *Dental Plaque/microbiology ; *Mouth Neoplasms/microbiology/pathology ; *Carcinoma, Squamous Cell/microbiology/pathology ; Female ; *Microbiota ; Male ; Middle Aged ; Neoplasm Staging ; Metagenomics ; }, abstract = {OBJECTIVES: To elucidate the changes in microbial composition and genomics in saliva and dental plaque during the progression of Oral Squamous Cell Carcinoma (OSCC), and to identify virulence factors and pathways associated with tumor differentiation in OSCC patients.<br><br>MATERIALS AND METHODS: Using metagenomic sequencing, 64 saliva and dental plaque samples from OSCC patients at different stages of differentiation were examined.<br><br>RESULTS: The results showed notable differences in the microbial composition and genomic profiles across ecological regions and differentiation degrees. Notably, the relative abundance of specific microbes, such as Porphyromonas gingivalis, Fusobacterium nucleatum, and Haemophilus parainfluenzae, increased in poorly differentiated OSCC. Microbial alpha diversity in dental plaque and saliva correlates with tumor T staging. Dental plaque microbiota shows higher specialization, especially in poorly differentiated tumors. Both microbiota types become more stable with advanced T staging. Genomic analysis reveals increased virulence factors in poorly differentiated stages.Subsequently, functional pathway analysis and tracing of pathogens reveal specific microbial mechanisms in oral cancer pathogenesis. Certain oral pathogens may promote tumorigenesis by secreting factors like GAPDH (glyceraldehyde-3-phosphate dehydrogenase), GspG (a gingipain precursor), and AllS (a lysine-specific gingipain precursor).<br><br>CONCLUSIONS: OSCC progression is associated with altered microbial composition, diversity, and genomic profiles in saliva and dental plaque. Poorly differentiated stages show higher abundance of pathogens and virulence factors, implicating them in tumorigenesis.<br><br>CLINICAL RELEVANCE: Understanding the microbial and genomic changes in saliva and dental plaque during OSCC progression could aid in developing new diagnostic biomarkers and targeted therapies, potentially enhancing early detection, treatment efficacy, and patient prognosis. Maintaining oral microbiota homeostasis may also help prevent oral cancer.}, }
@article {pmid40422085, year = {2025}, author = {Liu, L and Shi, J and Wang, H and Du, H and Yang, J and Wei, K and Zhou, Z and Li, M and Huang, S and Zhan, L and Li, G and Lv, Y and Shen, H and Cai, W}, title = {The characteristics of tissue microbiota in different anatomical locations and different tissue types of the colorectum in patients with colorectal cancer.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0019825}, pmid = {40422085}, issn = {2379-5077}, support = {No. WX23J03//Wuhan Municipal Health Commission/ ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology/pathology ; Male ; Female ; *Gastrointestinal Microbiome ; Middle Aged ; Aged ; *Rectum/microbiology/pathology ; *Colon/microbiology/pathology ; Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics/methods ; }, abstract = {The gut microbiota is intricately associated with the onset and progression of colorectal cancer (CRC), leading to significant interest in developing prevention and treatment strategies that leverage gut microbiota. In this study, we collected 57 samples from 19 CRC patients, comprising cancerous tissue, paracancerous tissue, and normal mucosa. Utilizing metagenomic sequencing and bioinformatics analysis, we identified differences in the microbiomes and their functional characteristics across the various tissue types. The results indicated that species such as Alistipes putredinis were predominantly found in normal tissues, while Pseudomonas putida was enriched in paracancerous tissue, and Malassezia restricta was prevalent in cancerous tissues. Furthermore, the microbial functions exhibited variability among the different tissue types. Random forest analysis suggested that Moraxella osloensis may be implicated in the onset and progression of colorectal cancer. We also classified the patients into three subgroups based on the anatomical location of the colorectum: right-sided colon, left-sided colon, and rectum. The subgroup analysis revealed that the microbiota enriched in normal mucosa and paracancerous tissue varied across different anatomical sites. These findings not only elucidate the characteristics of the microbiomes in the normal mucosa, paracancerous tissue, and cancerous tissues of CRC patients, thereby providing new potential targets for clinical diagnosis and treatment, but also contribute to the existing microbiome data pertinent to CRC research.IMPORTANCEThis study provides crucial insights into the relationship between gut microbiota and colorectal cancer (CRC) by analyzing microbial communities in different tissue types and anatomical locations of CRC patients. We identified distinct microbial signatures, such as Alistipes putredinis in normal tissues and Malassezia restricta in cancerous tissues, indicating location-specific microbiomes with unique functional attributes. These findings suggest potential new biomarkers or therapeutic targets for CRC. The observed microbiota variations among right-sided colon, left-sided colon, and rectum cancers underscore the heterogeneity of CRC, pointing toward more personalized treatment strategies. By enhancing our understanding of the microbiome's role in CRC, this research paves the way for innovative diagnostic tools and targeted therapies tailored to individual patient profiles. This work is essential for advancing clinical approaches to CRC management.}, }
@article {pmid40421996, year = {2025}, author = {Yang, H and Yang, Y and Cui, G and Xu, Y and Zhao, R and Le, G and Xie, Y and Li, P}, title = {Dietary methionine restriction ameliorates atherosclerosis by remodeling the gut microbiota in apolipoprotein E-knockout mice.}, journal = {Food &amp; function}, volume = {16}, number = {12}, pages = {4904-4922}, doi = {10.1039/d5fo00841g}, pmid = {40421996}, issn = {2042-650X}, mesh = {Animals ; *Atherosclerosis/metabolism/diet therapy/microbiology ; *Gastrointestinal Microbiome ; *Methionine/metabolism/deficiency/administration &amp; dosage ; Mice ; Male ; *Apolipoproteins E/genetics/metabolism/deficiency ; Mice, Knockout ; Mice, Inbred C57BL ; Oxidative Stress ; Diet, High-Fat/adverse effects ; Aorta/metabolism ; Mice, Knockout, ApoE ; }, abstract = {Dietary methionine restriction (MR) has been shown to reduce the risk of atherosclerosis, but the specific regulatory effects and mechanisms remain unclear. This research intends to investigate the effects of MR on atherosclerosis in apolipoprotein E-knockout (ApoE[-/-]) mice fed a high-fat, high-cholesterol, high-choline diet and their mechanisms. ApoE[-/-] mice were fed a normal diet (0.86% methionine + 4.5% fat + 0% cholesterol + 0.2% choline), a high-fat, high-cholesterol, high-choline diet (0.86% methionine + 20% fat + 1% cholesterol + 1% choline), or a high-fat, high-cholesterol, high-choline + MR diet (0.17% methionine + 20% fat + 1% cholesterol + 1% choline) for 8 consecutive weeks. The results show that MR reduced body weight, fat mass, fat deposition in the liver and adipocytes, and plasma lipid levels; improved the morphological structure of the aorta; and reduced the aortic lesion area and lipid levels. In addition, MR downregulated aortic pro-inflammatory cytokine levels, upregulated aortic anti-inflammatory cytokine levels, and improved aortic oxidative stress. Moreover, metagenomic sequencing results suggested that MR improved the gut microbiota composition, particularly through increased relative abundance of short-chain fatty acid (SCFA)-producing bacteria, and changed the relative abundance of inflammation-, lipid metabolism-, and bile acid metabolism-related bacteria at the species level. Furthermore, MR promoted SCFA production and bile acid metabolism, and reduced cell adhesion molecules and foam cell formation in the aorta. Thus, our findings indicated that MR improved the gut microbiota composition, especially increased SCFA production, and ameliorated oxidative stress and inflammation in the aorta, thereby preventing atherosclerosis.}, }
@article {pmid40420833, year = {2025}, author = {Clasen, F and Yildirim, S and Arıkan, M and Garcia-Guevara, F and Hanoğlu, L and Yılmaz, NH and Şen, A and Celik, HK and Neslihan, AA and Demir, TK and Temel, Z and Mardinoglu, A and Moyes, DL and Uhlen, M and Shoaie, S}, title = {Microbiome signatures of virulence in the oral-gut-brain axis influence Parkinson's disease and cognitive decline pathophysiology.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2506843}, pmid = {40420833}, issn = {1949-0984}, mesh = {Humans ; *Parkinson Disease/microbiology/physiopathology ; *Cognitive Dysfunction/microbiology/physiopathology ; *Gastrointestinal Microbiome ; *Mouth/microbiology ; *Brain/physiopathology/microbiology ; Male ; Female ; Aged ; *Bacteria/genetics/classification/pathogenicity/isolation &amp; purification ; Metagenomics ; Virulence ; Virulence Factors/genetics/metabolism ; Saliva/microbiology/chemistry ; Middle Aged ; }, abstract = {The human microbiome is increasingly recognized for its crucial role in the development and progression of neurodegenerative diseases. While the gut-brain axis has been extensively studied, the contribution of the oral microbiome and gut-oral tropism in neurodegeneration has been largely overlooked. Cognitive impairment (CI) is common in neurodegenerative diseases and develops on a spectrum. In Parkinson's Disease (PD) patients, CI is one of the most common non-motor symptoms but its mechanistic development across the spectrum remains unclear, complicating early diagnosis of at-risk individuals. Here, we generated 228 shotgun metagenomics samples of the gut and oral microbiomes across PD patients with mild cognitive impairment (PD-MCI) or dementia (PDD), and a healthy cohort, to study the role of gut and oral microbiomes on CI in PD. In addition to revealing compositional and functional signatures, the role of pathobionts, and dysregulated metabolic pathways of the oral and gut microbiome in PD-MCI and PDD, we also revealed the importance of oral-gut translocation in increasing abundance of virulence factors in PD and CI. The oral-gut virulence was further integrated with saliva metaproteomics and demonstrated their potential role in dysfunction of host immunity and brain endothelial cells. Our findings highlight the significance of the oral-gut-brain axis and underscore its potential for discovering novel biomarkers for PD and CI.}, }
@article {pmid40419960, year = {2025}, author = {Shen, Q and Fan, X and Sun, Y and Gao, H and Su, X}, title = {TaxaCal: enhancing species-level profiling accuracy of 16S amplicon data.}, journal = {BMC bioinformatics}, volume = {26}, number = {1}, pages = {136}, pmid = {40419960}, issn = {1471-2105}, support = {2021YFF0704500//National Key Research and Development Program of China/ ; 32070086//National Natural Science Foundation of China/ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Microbiota/genetics ; Metagenomics/methods ; Algorithms ; Machine Learning ; Humans ; *Bacteria/genetics/classification ; Sequence Analysis, DNA/methods ; }, abstract = {BACKGROUND: 16S rRNA amplicon sequencing is a widely used method for microbiome composition analysis due to its cost-effectiveness and lower data requirements compared to metagenomic whole-genome sequencing (WGS). However, inherent limitations in 16S-based approach often lead to profiling discrepancies, particularly at the species level, compromising the accuracy and reliability of findings.<br><br>RESULTS: To address this issue, we present TaxaCal (Taxonomic Calibrator), a machine learning algorithm designed to calibrate species-level taxonomy profiles in 16S amplicon data using a two-tier correction strategy. Validation on in-house produced and public datasets shows that TaxaCal effectively reduces biases in amplicon sequencing, mitigating discrepancies between microbial profiles derived from 16S and WGS. Moreover, TaxaCal enables seamless cross-platform comparisons between these two sequencing approaches, significantly improving disease detection in 16S-based microbiome data.<br><br>CONCLUSIONS: Therefore, TaxaCal offers a cost-effective solution for generating high-resolution microbiome species profiles that closely align with WGS results, enhancing the utility of 16S-based profiling in microbiome research. As microbiome-based diagnostics continue to evolve, TaxaCal has the potential to be a crucial tool in advancing the utility of 16S sequencing in clinical and research settings.}, }
@article {pmid40419790, year = {2025}, author = {Wang, D and Duan, Y and He, L and Jiang, J and Xian, J and Yuan, K and Zhang, R and Zhang, H and Wang, J and Li, N and Huang, M and Hu, C and Lu, S and Luo, Z and Deng, T and Zhang, Z and Chen, B and Li, W}, title = {Altered microbiota of the lower respiratory tract and its association with COVID-19 severity analysed by metagenomics and metatranscriptomics.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {804}, pmid = {40419790}, issn = {2399-3642}, support = {82102301//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Humans ; *COVID-19/microbiology/virology/mortality ; Male ; Female ; Metagenomics/methods ; Middle Aged ; Severity of Illness Index ; *SARS-CoV-2/genetics ; *Microbiota ; Aged ; Bronchoalveolar Lavage Fluid/microbiology ; Sputum/microbiology ; Adult ; Transcriptome ; *Respiratory System/microbiology ; }, abstract = {The interaction between gut and oropharyngeal microbiota plays a significant role in the viral infections like SARS-CoV-2, but role of the lower respiratory tract microbiota remains unclear. Our study utilized metatranscriptomics and metagenomics to analyze the microbial composition of bronchoalveolar lavage fluid and sputum samples from 116 COVID-19 patients, categorized into mild, severe, and critical groups. Our analysis revealed significant differences in viral genotypes across disease stages. As disease severity increased, the Chao index also rose. The mild group was predominantly dominated by Firmicutes, while the severe group showed an increase in Bacteroidetes. The critical group was characterized by a higher abundance of Actinobacteria and Proteobacteria. Notably, the abundance of Streptococcus and Rothia decreased as the disease progressed. Additionally, the Shannon index correlated with mortality risk, while the Chao index was associated with ICU admission, mechanical ventilation, and patient survival. These findings highlight the strong link between microbial composition and COVID-19 severity, providing valuable insights for assessing disease progression.}, }
@article {pmid40419614, year = {2025}, author = {Lu, W and Hua, J and Zhang, M and Yan, L and Zhao, H and Lv, X}, title = {Metagenomic sequencing reveals the taxonomic and functional characteristics of rumen microorganisms in Dongliu buffalo.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {18398}, pmid = {40419614}, issn = {2045-2322}, support = {[2021]1146//Joint Research on Improved Beef Cattle Breeds in Anhui Province/ ; }, mesh = {Animals ; *Rumen/microbiology ; *Buffaloes/microbiology ; Female ; Male ; *Metagenomics/methods ; *Metagenome ; *Gastrointestinal Microbiome ; *Bacteria/genetics/classification ; Phylogeny ; *Microbiota ; }, abstract = {In this study, the composition of the rumen microbiota and its functional characteristics were investigated using a metagenomic approach in Dongliu buffalo. This study compared the rumen microbial communities of six female and four male Dongliu buffaloes of similar age, weight and lifestyle. Taxonomic analysis identified 964 genera across 52 phyla, dominated by Bacteroidota (47.54%) and Bacillota (28.20%). While alpha and beta diversity showed no sex differences (PERMANOVA P = 0.82), males exhibited higher Fibrobacter at the genus level (P = 0.02). Functional profiling revealed 429 KEGG pathways, with carbohydrate metabolism (11.17%) and amino acid metabolism (9.74%) as dominant processes. Males showed enrichment in cellulose-degrading enzymes (EC2.4.1.20, EC1.2.1.90, EC2.7.1.58) and CAZymes (GH94, GT35), while females had higher Bacteroides abundance (P = 0.01) and CAZymes like CBM47. Core cellulolytic genera (Prevotella, Ruminococcus) demonstrated male-biased GH/CBM activity, linked to enhanced fiber degradation. COG annotation highlighted carbohydrate metabolism as central, with sex-specific functional partitioning in replication (female-enriched) and secondary metabolism (male-enriched). Network analysis revealed Prevotella's dominance in CAZymeme contributions and functional specialization in lignocellulose degradation pathways, suggesting sex-driven microbial adaptation to dietary fiber utilization.}, }
@article {pmid40415955, year = {2025}, author = {Guo, Y and Lin, L and Zhang, M and Yu, Y and Wang, Y and Cao, J and Li, Y and Sun, X and Guan, M and Wen, S and Wang, X and Fang, Z and Duan, W and Duan, J and Huang, T and Xia, W and Guo, S and Wei, F and Zheng, D and Huang, X}, title = {Salivary mycobiome alterations in HIV-infected MSM: dominance of Pseudogymnoascus and functional shifts across disease stages.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1564891}, pmid = {40415955}, issn = {2235-2988}, mesh = {Humans ; Male ; *Saliva/microbiology ; Cross-Sectional Studies ; *HIV Infections/microbiology/complications ; *Mycobiome ; Adult ; *Homosexuality, Male ; Middle Aged ; CD4 Lymphocyte Count ; *Fungi/classification/genetics/isolation &amp; purification ; Disease Progression ; Metagenomics ; }, abstract = {BACKGROUND: Oral health is increasingly recognized as a crucial determinant of overall health in people living with HIV/AIDS (PLWHA). Specifically, the oral mycobiome may play a pivotal role in HIV-associated oral complications. However, the fungal species involved and their potential as biomarkers for HIV-related oral conditions remain poorly understood. This study investigates salivary fungal profiles in PLWHA who have sex with men (MSM), focusing on diversity, functional shifts, and correlations with disease progression.<br><br>METHODS: A cross-sectional study included 25 MSM participants divided into five groups: HIV-negative controls (n = 5) and four HIV-positive groups stratified by CD4 count: Stage 0 (HIV RNA-positive/antibody-negative; n = 5), Stage 1 (CD4 &#x2265;500 cells/&#x3bc;L; n = 5), Stage 2 (CD4 200-499 cells/&#x3bc;L; n = 5), and Stage 3 (CD4 <200 cells/&#x3bc;L or opportunistic infections; n = 5). Saliva samples were collected and analyzed using metagenomic sequencing (Illumina NovaSeq platform). Bioinformatic analyses included genome assembly (MEGAHIT), gene clustering (CD-HIT), gene abundance calculation (SOAPaligner), species annotation (BLASTP), and KEGG pathway annotation (KOBAS 2.0). Statistical analyses (Kruskal-Wallis tests, Spearman's correlation) assessed associations between fungal profiles, CD4 count, and viral loads.<br><br>RESULTS: A total of 51 fungal genera were identified, with Pseudogymnoascus being the most abundant. Functional analysis revealed 113 shared KEGG pathways, of which 69 were unique to Stage 3, primarily related to metabolic and disease-related processes. Notably, Auricularia exhibited a positive correlation with CD4 count (P &#x2264; 0.01), while Mucor showed a negative correlation (P = 0.0299).<br><br>CONCLUSIONS: Salivary mycobiome composition and function shift significantly across HIV stages, reflecting immune decline. Pseudogymnoascus dominance challenges conventional views of oral fungal ecology in immunocompromised hosts. These findings highlight the mycobiome's diagnostic potential for monitoring HIV-related oral health. Longitudinal studies are needed to validate clinical relevance.}, }
@article {pmid40414991, year = {2025}, author = {Rashid, MH and Pascottini, OB and Xie, L and Niazi, M and Lietaer, L and Comlekcioglu, U and Opsomer, G}, title = {Shotgun metagenomic composition, microbial interactions and functional insights into the uterine microbiome of postpartum dairy cows with clinical and subclinical endometritis.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {18274}, pmid = {40414991}, issn = {2045-2322}, support = {2(3)/HRD/OSS-III/2022/HEC/83//Higher Education Commission, Pakistan/ ; KP 2020; FFB200048//Ghent University, Belgium/ ; BOF17/DOC/269//Ghent University, Belgium/ ; 12Y5220N//University of Antwerp, Belgium/ ; CSC; 202206300032//China Scholarship Council/ ; }, mesh = {Animals ; Cattle ; Female ; *Endometritis/microbiology/veterinary ; *Cattle Diseases/microbiology ; *Microbiota/genetics ; Metagenomics/methods ; Postpartum Period ; *Uterus/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; *Microbial Interactions ; Metagenome ; }, abstract = {Clinical endometritis (CE) is associated with bacterial pathogens while the same has not been proved about subclinical endometritis (SCE). We aimed to use shotgun metagenomic sequencing to investigate the associations between potentially unidentified pathogens and SCE. Uterine cytobrush samples from multiparous Holstein cows (n = 23) were taken at 21 days in milk (DIM) and sequenced via the Illumina shotgun platform. At 36 DIM, the cows were diagnosed as CE (n = 7), SCE (n = 7), or healthy (n = 9). We did not find differences in the alpha and beta diversity of bacteria and eukaryotes among the health groups. Relative abundance of typical pathogens i.e. Fusobacterium, Peptoniphilus, Peptostreptococcus, and Trueperella was greater in CE than healthy controls. We did not find evidence of eukaryotic or viral association in infection, yet, distinct patterns of bacterial co-occurrence were observed among pathogenic and non-pathogenic bacteria. In CE cows, Wnt/catenin pathway had lower abundance than SCE or healthy cows. Our findings support that CE is characterized by domination of pathogenic bacteria that intercorrelate, whereas SCE is not associated with bacterial colonization.}, }
@article {pmid40414843, year = {2025}, author = {Thompson, TP and Rice, CJ and Athanasakis, E and Mawhinney, J and Gilmore, BF and Fitzgerald, P and Skvortsov, T and Kelly, SA}, title = {The effect of sample type and location on industrial workplace sink and hand dryer microbiomes.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {325}, pmid = {40414843}, issn = {1471-2180}, mesh = {*Microbiota/genetics ; *Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Humans ; Workplace ; Drug Resistance, Bacterial ; Anti-Bacterial Agents/pharmacology ; Hand Disinfection ; Hand/microbiology ; Metagenomics ; }, abstract = {One major issue in tackling antimicrobial resistance (AMR) is the ability to effectively track resistance spread in environments where surveillance is limited. Such environments include those experiencing high volumes of hand washing and drying from multiple users. This study characterised the microbial populations and antimicrobial resistomes of two different sample types from a pharmaceutical industrial site as part of an AMR environmental surveillance programme. Paired samples were collected from hand dryers and adjacent sinks in distinct sampling locations: from toilets adjacent to 'wet' labs, and locations associated with 'dry' activities. Microbial populations in hand dryers were significantly different to those of sinks, whereas there was no significant difference based on sample location. The opposite effect was observed for resistomes, where profiles differed significantly based on sample location, but not sample type. When both sample type and location were considered together, differences in microbiomes were driven primarily by hand dryer profiles from different locations. Analysis of metagenomically-assembled genomes revealed the presence of many poorly characterised organisms, and suggested no specific families predominated in terms of ARG carriage. This study emphasises the impact of human activities in determining the resistome of commonly used appliances, and the need for continued AMR surveillance programmes.}, }
@article {pmid40413859, year = {2025}, author = {Merchant, M and Mande, SS and Sar, P}, title = {Microbial community enrichment and transition in landfill for the biotransformation of unpretreated low-density polyethylene (LDPE) under aerobic and anaerobic conditions.}, journal = {Chemosphere}, volume = {382}, number = {}, pages = {144429}, doi = {10.1016/j.chemosphere.2025.144429}, pmid = {40413859}, issn = {1879-1298}, mesh = {*Polyethylene/metabolism ; Waste Disposal Facilities ; Biodegradation, Environmental ; Anaerobiosis ; Biotransformation ; Aerobiosis ; Bacteria/metabolism/genetics/classification ; RNA, Ribosomal, 16S/genetics ; *Microbiota ; }, abstract = {Low density polyethylene (LDPE), prevalent in single-use plastics, poses a significant environmental challenge due to its limited biodegradation. This study aims to enrich and characterize unpretreated LDPE degrading microorganisms from a nearly 50-year-old municipal landfill under aerobic and anaerobic conditions. Detailed analysis of the microbial communities through 16S rRNA gene based metataxonomy, whole genome metagenomics as well as thorough characterization of LDPE films exposed to the enriched microorganisms are done. Distinct shifts between plastisphere and bulk communities were observed. Shotgun metagenomics enabled reconstruction of thirty high-quality metagenome-assembled genomes (MAGs), revealing genes for plastic and hydrocarbon degradation, and biosurfactant production. Several plastic degradation-associated bacteria were identified, including Pseudomonas, Streptomyces, Burkholderia, Bacillus, Thermobifida, Saccharomonospora, Methylocaldum, Methylobacter, Ilumatobacter, Rubrivivax, and archaeal candidates like Methanosarcina and Nitrosarchaeum were observed. MAGs from Burkholderiales and Chlamydiales showed higher potential for LDPE degradation. Scanning electron microscopy showed biofilm formation on plastics, atomic force microscopy indicated surface topological changes, and Fourier transform infrared spectroscopy revealed increased carbonyl groups. Aerobic enrichments allowed up to 60% weight reduction of LDPE, with a degradation rate of 0.00766 mg/day and reaching half-life in nearly 90.49 days, confirming the biodegradation potential of the microbial community. From these observations, this study suggests two potential mechanisms of LDPE degradation under aerobic and anaerobic conditions by enriched communities. This study highlights role of landfill microbiomes in LDPE degradation, offering valuable insights into microbial succession of plastisphere and contributing to the development of effective plastic-degrading community. Future research could explore optimizing these for large-scale plastic waste management.}, }
@article {pmid40413728, year = {2025}, author = {Kousgaard, SJ and Dall, SM and Albertsen, M and Nielsen, HL and Thorlacius-Ussing, O}, title = {Fecal microbiota transplantation from a healthy pouch donor for chronic pouchitis: a proof-of-concept study.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2510464}, pmid = {40413728}, issn = {1949-0984}, mesh = {Humans ; *Pouchitis/therapy/microbiology ; *Fecal Microbiota Transplantation/adverse effects/methods ; Male ; Female ; Adult ; Middle Aged ; Feces/microbiology ; Quality of Life ; Chronic Disease/therapy ; Gastrointestinal Microbiome ; Proof of Concept Study ; Treatment Outcome ; Tissue Donors ; Denmark ; }, abstract = {Chronic pouchitis is a common complication after ileal pouch-anal anastomosis (IPAA) with limited treatment options. In this case series, we aimed to investigate clinical and microbiome changes, as well as adverse events, associated with using fecal microbiota transplantation (FMT) from a donor with a normal functioning IPAA to induce remission in patients with chronic pouchitis. Methods The study was a case-series including a 4-week intervention period and 12-month follow-up. Patients with chronic pouchitis who met the inclusion criteria were recruited from the Department of Gastrointestinal Surgery at Aalborg University Hospital, Denmark. Participants received FMT derived from a donor with a normal functioning IPAA. Treatment was administered by enema daily for two weeks, then every other day for two more weeks. Disease severity and quality of life (QoL) were accessed at baseline and 30-day follow-up. Clinical remission was defined as Pouchitis Disease Activity Index (PDAI) <7. Fecal samples from participants, healthy donors, and the IPAA donor were analyzed using shotgun metagenomic sequencing. Results Three patients with chronic pouchitis were included and completed the treatment protocol and follow-up visits. At the 30-day follow-up, all participants achieved clinical remission with reduced endoscopic inflammation. The median total PDAI score decreased from 8 (range 10-8) at baseline to 6 (range 6-5) at 30 days. Two participants reported improved QoL, while one reported no change. Few mild, self-limited adverse events were reported by all participants during treatment, with no serious events. Principal component analysis of fecal samples distinguished two clusters: healthy donors and the IPAA donor, with participant samples forming a separate cluster Conclusion We observed that all participants achieved clinical remission with reduced endoscopic inflammation following a 4-week FMT intervention. Adverse events were mild and self-limited. Metagenomic analysis revealed distinct microbiome clusters between IPAA donor and recipients, both of which differed from those of healthy donors.}, }
@article {pmid40413726, year = {2025}, author = {Zhang, DY and Li, D and Chen, SJ and Zhang, LJ and Zhu, XL and Chen, FD and Chen, C and Wang, Q and Du, Y and Xiong, JX and Huang, SM and Zhang, XD and Lv, YT and Zeng, F and Chen, RX and Huang, X and Mao, F and Zhou, S and Yao, Q and Huang, Y and Chen, R and Mo, Y and Xie, Y and Jiang, YH and Chen, Z and Mo, CY and Chen, JJ and Bai, FH}, title = {Bacteroides uniformis-generated hexadecanedioic acid ameliorates metabolic-associated fatty liver disease.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2508433}, pmid = {40413726}, issn = {1949-0984}, mesh = {Humans ; Gastrointestinal Microbiome ; Animals ; *Bacteroides/metabolism/genetics ; Mice ; Male ; Female ; Middle Aged ; Feces/microbiology ; Liver/metabolism ; *Fatty Liver/microbiology/metabolism ; Fecal Microbiota Transplantation ; Prospective Studies ; Adult ; Metabolomics ; Mice, Inbred C57BL ; }, abstract = {Gut microbiota exerts a pivotal influence on the development of Metabolic Associated Fatty Liver Disease (MAFLD), although the specific contributions of individual bacterial strains and their metabolites remain poorly defined. We conducted stool shotgun metagenomic sequencing and plasma untargeted metabolomics in a large prospective cohort comprising 120 MAFLD patients and 120 matched healthy controls. The mechanisms and microbial-derived metabolites involved in MAFLD were further investigated through multi-omics analyses in vitro and in vivo. Distinct differences were identified in both the microbial community structure and metabolomic profiles between MAFLD patients and healthy controls. Bacteroides uniformis (B. uniformis) was the most significantly depleted species in MAFLD and negatively correlated with hepatic steatosis and BMI. MAFLD was characterized by marked disruptions in fatty acid and amino acid metabolism. Combined analysis of metabolomic and metagenomic data achieved high diagnostic accuracy for MAFLD and hepatic steatosis severity (AUC = 0.93). Transplantation of fecal microbiota from MAFLD subjects into ABX mice led to the onset of MAFLD-like symptoms, whereas B. uniformis administration alleviate disease progression by inhibiting intestinal fat absorption, FFA from eWAT influx into liver via the gut-liver axis, and IRE1α-XBP1s-mediated flipogenesis and ferroptosis, as confirmed by hepatic transcriptomic and proteomic analyses. Hexadecanedioic acid (HDA), potentially identified as a key metabolite produced by B. uniformis, ameliorated MAFLD symptoms. Mechanistically, B. uniformis-derived HDA also inhibited fat absorption and transported, and entered the liver via the portal vein to suppress IRE1α-XBP1s-mediated flipogenesis and ferroptosis. B. uniformis and its potential putative metabolite HDA may contribute to MAFLD progression modulation, through regulation of the IRE1α-XBP1s axis. This study provides new insights into the gut-liver axis in MAFLD and offers promising therapeutic targets based on specific microbes and their metabolites.}, }
@article {pmid40413611, year = {2025}, author = {Ju, J and He, J and Ye, B and Li, S and Zhao, J and Chen, W and Zhang, Q and Zhao, W and Yang, J and Liu, L and Li, Y and Xia, M and Liu, Y}, title = {Microbial metabolism mediates the deteriorative effects of sedentary behaviour on insulin resistance.}, journal = {Clinical and translational medicine}, volume = {15}, number = {5}, pages = {e70348}, pmid = {40413611}, issn = {2001-1326}, support = {2023YFC3606300//National Key Research and Development Program of China/ ; 82330105//Key Project of National Natural Science Foundation of China/ ; Overseas//Distinguished Young Scholars of the National Natural Science Foundation of China/ ; 21HAA01094//Distinguished Young Scholars of the National Natural Science Foundation of China/ ; 2024A04J6477//Guangzhou Science and Technology Project/ ; }, mesh = {*Insulin Resistance/physiology ; Humans ; *Sedentary Behavior ; Male ; *Gastrointestinal Microbiome/physiology ; Adult ; }, abstract = {BACKGROUND: Prolonged sedentary time is a strong risk factor for insulin resistance. Recent evidence indicates that gut microbiota may influence the regulation of insulin sensitivity and demonstrates a distinct profile between sedentary and physically active individuals. However, whether and how microbial metabolism mediates the progression of insulin resistance induced by prolonged sedentary time remains unclear.<br><br>METHODS: 560 male participants without hypoglycaemic therapy were included, and insulin resistance was evaluated using the Homeostatic Model Assessment of Insulin Resistance (HOMA-IR). The gut microbiota was identified through metagenomics, host genetic data were obtained using a genotyping array, and plasma metabolites were quantified by liquid chromatography mass spectrometry.<br><br>RESULTS: A panel of 15 sedentary-related species and 38 sedentary-associated metabolic capacities accounted for 31.68% and 21.48% of the sedentary time-related variation in HOMA-IR, respectively. Specifically, decreased Roseburia sp. CAG:471, Intestinibacter bartlettii, and Firmicutes bacterium CAG:83, but increased Bacteroides xylanisolvens related to longer sedentary time, were causally linked to the development of insulin resistance. Furthermore, integrative analysis with metabolomics identified reduced L-citrulline and L-serine, resulting from a suppression of arginine biosynthesis as key microbial effectors linking longer sedentary time to enhanced insulin resistance.<br><br>CONCLUSIONS: In summary, our findings provide insights into the mediating role of gut microbiota on the progression of insulin resistance induced by excessive sedentary time, and highlight the possibility of counteracting the detrimental effect of prolonged sedentary time on insulin resistance by microbiota-modifying interventions.<br><br>KEY POINTS: Prolonged sedentary time leads to a depletion of Roseburia sp. CAG:471 and Firmicutes bacterium CAG:83, and suppresses arginine biosynthesis. Decreased L-citrulline and L-serine function as key microbial effectors mediating the adverse effect of sedentary time on insulin sensitivity. Targeting gut microbiota holds promise to combat insulin resistance induced by excessive sedentary time.}, }
@article {pmid40413198, year = {2025}, author = {Brandão Gontijo, J and Huang, L and Levintal, E and Prieto García, C and Erikson, CB and Coyotl, A and Horwath, WR and Dahlke, HE and Mazza Rodrigues, JL}, title = {Depth-dependent Metagenome-Assembled Genomes of Agricultural Soils under Managed Aquifer Recharge.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {858}, pmid = {40413198}, issn = {2052-4463}, support = {7975//Gordon and Betty Moore Foundation (Gordon E. and Betty I. Moore Foundation)/ ; 2021-38420-34070//United States Department of Agriculture | National Institute of Food and Agriculture (NIFA)/ ; }, mesh = {*Soil Microbiology ; *Groundwater ; Agriculture ; *Metagenome ; Microbiota ; Bacteria/genetics/classification ; Metagenomics ; California ; Archaea/genetics ; Soil ; }, abstract = {Managed Aquifer Recharge (MAR) systems, which intentionally replenish groundwater aquifers with excess water, are critical for addressing water scarcity exacerbated by demographic shifts and climate variability. To date, little is known about the functional diversity of the soil microbiome at different soil depth inhabiting agricultural soils used for MAR. Knowing the functional diversity is pivotal in regulating nutrient cycling and maintaining soil health. Metagenomics, particularly Metagenome-Assembled Genomes (MAGs), provide a powerful tool to explore the diversity of uncultivated soil microbes, facilitating in-depth investigations into microbial functions. In a field experiment conducted in a California vineyard, we sequenced soil DNA before and after water application of MAR. Through this process, we assembled 146 medium and 14 high-quality MAGs, uncovering a wide array of archaeal and bacterial taxa across different soil depths. These findings advance our understanding of the microbial ecology and functional diversity of soils used for MAR, contributing to the development of more informed and sustainable land management strategies.}, }
@article {pmid40412963, year = {2025}, author = {Wang, C and Tian, Z and Luan, X and Zhang, H and Zhang, Y and Yang, M}, title = {Distribution of antibiotic resistance genes on chromosomes, plasmids and phages in aerobic biofilm microbiota under antibiotic pressure.}, journal = {Journal of environmental sciences (China)}, volume = {156}, number = {}, pages = {647-659}, doi = {10.1016/j.jes.2024.10.008}, pmid = {40412963}, issn = {1001-0742}, mesh = {*Biofilms/drug effects ; Plasmids/genetics ; *Anti-Bacterial Agents/pharmacology ; Bacteriophages/genetics ; *Drug Resistance, Microbial/genetics ; *Microbiota/genetics ; *Genes, Bacterial ; *Drug Resistance, Bacterial/genetics ; }, abstract = {The objective of this study is to quantitatively reveal the main genetic carrier of antibiotic resistance genes (ARGs) for blocking their environmental dissemination. The distribution of ARGs in chromosomes, plasmids, and phages for understanding their respective contributions to the development of antimicrobial resistance in aerobic biofilm consortium under increasing stresses of oxytetracycline, streptomycin, and tigecycline were revealed based on metagenomics analysis. Results showed that the plasmids harbored 49.2 %-83.9 % of resistomes, which was higher (p < 0.001) than chromosomes (2.0 %-35.6 %), and no ARGs were detected in phage contigs under the strict alignment standard of over 80 % identity used in this study. Plasmids and chromosomes tended to encode different types of ARGs, whose abundances all increased with the hike of antibiotic concentrations, and the variety of ARGs encoded by plasmids (14 types and 64 subtypes) was higher than that (11 types and 27 subtypes) of chromosomes. The dosing of the three antibiotics facilitated the transposition and recombination of ARGs on plasmids, mediated by transposable and integrable transfer elements, which increased the co-occurrence of associated and unassociated ARGs. The results quantitatively proved that plasmids dominate the proliferation of ARGs in aerobic biofilm driven by antibiotic selection, which should be a key target for blocking ARG dissemination.}, }
@article {pmid40412639, year = {2025}, author = {Iriarte, J and Lundin, D and Martinez-Varela, A and Gónzalez, JM and Sánchez, P and Dachs, J and Vila-Costa, M}, title = {Entanglement of hydrocarbon-degrading bacteria and polycyclic aromatic hydrocarbons in the ocean.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {379}, number = {}, pages = {126512}, doi = {10.1016/j.envpol.2025.126512}, pmid = {40412639}, issn = {1873-6424}, mesh = {*Polycyclic Aromatic Hydrocarbons/metabolism/analysis ; *Seawater/microbiology/chemistry ; *Bacteria/metabolism/genetics/classification ; *Water Pollutants, Chemical/metabolism/analysis ; Biodegradation, Environmental ; Phylogeny ; Oceans and Seas ; Microbiota ; Metagenome ; }, abstract = {Knowledge of Earth's microbiomes' capacity to degrade aromatic compounds is limited by the lack of accurate tools for identifying degrading genes and their associated taxa. Additionally, these estimates are hardly compared to in situ background concentrations of polycyclic aromatic hydrocarbons (PAHs), particularly in oceanic waters. This knowledge is important for assessing the persistence of the widespread and abundant PAHs in the environment and their interactions with microbes. Here, we present a new tool to identify aromatic ring-hydroxylating dioxygenase α-subunit (arhdA) gene sequences by combining profile-based search with phylogenetic placement in a reference phylogeny. We identified arhdA-harboring taxa in both the Genome Taxonomy Database and the Malaspina Vertical Profiles Gene Database, a gene catalog derived from metagenomes collected during the Malaspina expedition. We found that multiple ubiquitous taxa in tropical and temperate oceans harbor arhdA. The comparison of arhdA gene abundances in seawater metagenomes with the field PAH concentrations showed that higher abundances of arhdA gene copies per cell were negatively correlated with 2-4 ring PAHs, consistent with the known degradation of lighter PAHs. Gene abundances were significantly higher in the particle-associated fraction than in the free-living fraction, suggesting particulate matter as a relevant reservoir of PAH degraders. Finally, we show that PAHs, together with other environmental variables, modulate the structure of oceanic microbial communities.}, }
@article {pmid40410832, year = {2025}, author = {Chu, B and Ge, S and He, W and Sun, X and Ma, J and Yang, X and Lv, C and Xu, P and Zhao, X and Wu, K}, title = {Gut symbiotic bacteria enhance reproduction in Spodoptera frugiperda (J.E. Smith) by regulating juvenile hormone III and 20-hydroxyecdysone pathways.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {132}, pmid = {40410832}, issn = {2049-2618}, support = {2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; 2023FY100500//Chinese Science &amp;Technology Fundamental Resources Investigation Program/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; CARS-02//National Modern Agricultural Industry Technology System Construction Fund of China/ ; }, mesh = {Animals ; *Spodoptera/microbiology/physiology/metabolism ; *Gastrointestinal Microbiome/physiology ; *Ecdysterone/metabolism ; *Symbiosis ; Female ; Reproduction ; Enterobacter/isolation &amp; purification/physiology ; Larva/microbiology ; Enterococcus/isolation &amp; purification/physiology/genetics ; Klebsiella/isolation &amp; purification/genetics/physiology ; Bacteria/classification/genetics ; *Juvenile Hormones/metabolism ; }, abstract = {BACKGROUND: The insect gut microbiota forms a complex, multifunctional system that significantly affects phenotypic traits linked to environmental adaptation. Strong reproductive potential underpins the migratory success, population growth and destructive impact of the fall armyworm, Spodoptera frugiperda (J.E. Smith). However, the precise role of gut bacteria in S. frugiperda reproductive processes, distribution and transmission dynamics remains unclear.<br><br>RESULTS: We examined the gut microbiota of S. frugiperda a major invasive agricultural pest, identifying Enterococcus, Enterobacter, and Klebsiella as core microorganisms present throughout its life cycle. These microbes showed heightened activity during the egg stage, early larval stages and pre-oviposition period in females. Using an axenic insect re-infection system, Enterococcus quebecensis FAW181, Klebsiella michiganensis FAW071 and Enterobacter hormaechei FAW049 were found to significantly enhance host fecundity, increasing egg production by 62.73%, 59.95%, and 56.71%, respectively. Metagenomic and haemolymph metabolomic analyses revealed a positive correlation between gut symbiotic bacteria and hormone metabolism in female S. frugiperda. Further analysis of metabolites in the insect hormone biosynthesis pathway, along with exogenous injection of juvenile hormone III and 20-hydroxyecdysone, revealed that gut microbes regulate these hormones, maintaining levels equivalent to those in control insects. This regulation supports improved fecundity in S. frugiperda, aiding rapid colonization and population expansion.<br><br>CONCLUSIONS: These findings emphasize the pivotal role of gut bacteria E. quebecensis FAW181, E. hormaechei FAW049, and K. michiganensis FAW071 in enhancing S. frugiperda reproduction by modulating JH III levels through JHAMT regulation and concurrently modulating the levels of 20E and its precursors via PHM. Our results provide novel insights into microbe-host symbiosis and pest management strategies for alien invasive species. Video Abstract.}, }
@article {pmid40410138, year = {2025}, author = {Chen, AS and Kim, H and Nzabarushimana, E and Shen, J and Williams, K and Gurung, J and McGoldrick, J and Burke, KE and Yarze, JC and Nguyen, LH and Staller, K and Chung, DC and Xavier, RJ and Khalili, H}, title = {Association of distinct microbial and metabolic signatures with microscopic colitis.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4644}, pmid = {40410138}, issn = {2041-1723}, support = {P30 DK043351/DK/NIDDK NIH HHS/United States ; R01 AG068390/AG/NIA NIH HHS/United States ; P30DK043351//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; R01AG068390//U.S. Department of Health &amp; Human Services | NIH | National Institute on Aging (U.S. National Institute on Aging)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Middle Aged ; *Metabolome ; Feces/microbiology ; *Colitis, Microscopic/microbiology/metabolism ; Aged ; Adult ; Case-Control Studies ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Diarrhea/microbiology/metabolism ; Metabolomics ; Metagenomics ; Biomarkers/metabolism ; }, abstract = {Microscopic colitis (MC) is a chronic inflammatory disease of the large intestine that primarily affects older adults and presents with chronic diarrhea. The etiology is unknown and there are currently no FDA approved medications or biomarkers for treatment or monitoring of the disease. Emerging evidence have implicated the gut microbiome and metabolome disturbances in MC pathogenesis. We conduct a comprehensive analysis of gut microbial and metabolic changes in a cohort of 683 participants, including 131 patients with active MC, 159 with chronic diarrhea, and 393 age- and sex-matched controls without diarrhea. Stool microbiome and metabolome are profiled using whole-genome shotgun metagenomic sequencing and ultra-high performance liquid chromatography-mass spectrometry, respectively. Compared to controls, eight microbial species including pro-inflammatory oral-typical Veillonella dispar and Haemophilus parainfluenzae, and 11 species, including anti-inflammatory Blautia glucerasea and Bacteroides stercoris are enriched and depleted in MC, respectively. Pro-inflammatory metabolites, including lactosylceramides, ceramides, lysophospholipids, and lysoplasmalogens, are enriched in active MC. Multi-omics analyses reveal robust associations between microbial species, metabolic pathways, and metabolites, suggesting concordant disruptions in MC. Here, we show distinct shifts in gut microbiome and metabolome in MC that can inform the development of non-invasive biomarkers and novel therapeutics.}, }
@article {pmid40410126, year = {2025}, author = {Su, C and Zhou, H and Wang, Y and Duan, X and Jiang, T and Zhang, C and Gao, H and Kong, L and Wang, M and Guo, C}, title = {Contrasting Effects of Atmospheric Particulate Matter Deposition on Free-Living and Particle-Associated Bacteria in the South China Sea.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {22}, pages = {11016-11028}, doi = {10.1021/acs.est.4c12533}, pmid = {40410126}, issn = {1520-5851}, mesh = {*Particulate Matter ; *Bacteria ; China ; Atmosphere ; Seawater/microbiology ; }, abstract = {Atmospheric particulate matter (PM) deposition has become an important nutrient source in marine ecosystems, increasing particulate organic carbon and resource heterogeneity. However, their effects on marine bacterial communities remain unclear. In this study, by conducting on-board microcosm experiments with anthropogenic East Asian PM in the oligotrophic South China Sea, the response of particle-associated (PA) bacteria was investigated and compared with its free-living (FL) counterparts. Results showed that PM input increased nutrient heterogeneity, shifting bacterial community composition and lifestyle. Copiotrophic PA bacteria became more abundant and contributed a disproportionately higher percentage to total bacterial production despite a decline in total bacterial abundance. FL bacteria showed increased diversity, shifting from oligotrophs to copiotrophs, while PA bacteria displayed reduced diversity and nondirectional compositional changes, suggesting their distinct assembly mechanisms in response to external nutrient inputs. Metagenomic analysis further revealed that PM drives a shift toward a copiotrophic, particle-attached lifestyle with upregulated pathways for chemotaxis, motility, and biofilm formation. Notably, PM addition also increased the relative abundance of oil-degrading taxa. These findings reveal the complexity of microbial responses to environmental perturbations and underscore the need to consider unique ecological niches and bacterial lifestyles.}, }
@article {pmid40409349, year = {2025}, author = {Zhou, S and Wang, K and Huang, J and Xu, Z and Yuan, Q and Liu, L and Wang, Z and Miao, J and Wang, H and Wang, T and Guan, W and Ding, C}, title = {Indole-3-lactic acid suppresses colorectal cancer via metabolic reprogramming.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2508949}, pmid = {40409349}, issn = {1949-0984}, mesh = {*Colorectal Neoplasms/metabolism/drug therapy/pathology/microbiology ; Humans ; Animals ; Gastrointestinal Microbiome/drug effects ; Mice ; *Indoles/metabolism/pharmacology/administration &amp; dosage ; STAT3 Transcription Factor/metabolism ; Cell Proliferation/drug effects ; Tryptophan/metabolism ; Cell Line, Tumor ; Male ; Female ; Receptors, Aryl Hydrocarbon/metabolism ; Cell Movement/drug effects ; Apoptosis/drug effects ; Metabolic Reprogramming ; }, abstract = {Research indicates that abnormal gut microbiota metabolism is linked to colorectal cancer (CRC) progression, but the role of microbiota-related tryptophan metabolism disruption remains unclear. Using metagenomic sequencing and targeted Trp metabolomics, our research identified that CRC patients had abnormal indole-3-lactic acid (ILA) levels, which were related to tumor malignancy. Exogenous ILA administration suppressed CRC development in AOM/DSS induced and xenograft mice models. Furthermore, in vitro experiments demonstrated that ILA inhibits tumor cell proliferation, migration, and anti-apoptotic capabilities. Mechanistically, ILA appears to directly occupy the phosphorylation sites of STAT3, leading to a reduction in intracellular phosphorylated STAT3 (p-STAT3) levels and the inhibition of the HK2 pathway, thereby downregulating glucose metabolism in cancer cells. Notably, this inhibition is independent of the aryl hydrocarbon receptor (AHR). In conclusion, our research findings demonstrate that alterations in tryptophan metabolism among CRC patients can influence tumor progression and reveal a novel mechanism through which ILA exerts its inhibitory effects on CRC. These findings offer new insights into the role of gut microbiota in CRC and identify potential clinical therapeutic targets.}, }
@article {pmid40409085, year = {2025}, author = {Xie, Y and Wang, T and Guo, C and Chu, C and Liu, Z and Jiang, L and Deng, Y and Yi, J}, title = {Metagenomic insights into the microorganisms responsible for producing amino acid nitrogen during sufu fermentation.}, journal = {Food chemistry}, volume = {487}, number = {}, pages = {144763}, doi = {10.1016/j.foodchem.2025.144763}, pmid = {40409085}, issn = {1873-7072}, mesh = {Fermentation ; *Amino Acids/metabolism ; *Nitrogen/metabolism/analysis ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; Metagenomics ; *Fungi/metabolism/genetics/classification/isolation &amp; purification ; Microbiota ; }, abstract = {Amino acid nitrogen (AAN), a key contributor to umami taste, plays a central role in flavor development during sufu fermentation. Given the critical influence of microbial metabolism on flavor formation, this study employed metagenomic analysis to investigate the mechanisms of AAN generation. During sufu fermentation, the AAN content increased significantly, reaching a final concentration of 0.56 g/100 g. Metagenomic analysis revealed that both bacterial (e.g., Dysgonomonas macrotermitis, Lactococcus lactis) and fungal (e.g., Rhizopus arrhizus) species were the core microbiota driving AAN formation. These microorganisms encoded abundant proteases and amino acid hydrolases essential for AAN metabolism. Functional profiling highlighted carbohydrate and amino acid metabolism as the dominant pathways in flavor formation. Notably, glutamate synthesis was associated with pathways ko00220 and ko00250, mediated by glutamate synthetase (EC 1.4.1.13) and glutamine synthetase (EC 6.3.1.2). These findings elucidate the microbial enzymatic mechanisms-particularly amino acid transformations-underlying sufu's umami taste development during fermentation.}, }
@article {pmid40407096, year = {2025}, author = {Creskey, M and Silva Angulo, F and Wu, Q and Tamming, L and Fekete, EEF and Cheng, K and Ning, Z and Wang, A and Brito Rodrigues, P and de Rezende Rodovalho, V and Ramirez Vinolo, MA and Figeys, D and Li, X and Trottein, F and Zhang, X}, title = {Metaproteomics reveals age-specific alterations of gut microbiome in hamsters with SARS-CoV-2 infection.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2505117}, pmid = {40407096}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome ; *COVID-19/microbiology/virology ; Cricetinae ; *Proteomics/methods ; SARS-CoV-2 ; Feces/microbiology ; Age Factors ; Metagenomics ; Disease Models, Animal ; Mesocricetus ; Male ; }, abstract = {The gut microbiome's pivotal role in health and disease is well established. SARS-CoV-2 infection often causes gastrointestinal symptoms and is associated with changes of the microbiome in both human and animal studies. While hamsters serve as important animal models for coronavirus research, there exists a notable void in the functional characterization of their microbiomes with metaproteomics. In this study, we present a workflow for analyzing the hamster gut microbiome, including a metagenomics-derived hamster gut microbial protein database and a data-independent acquisition metaproteomics method. Using this workflow, we identified 32,419 protein groups from the fecal microbiomes of young and old hamsters infected with SARS-CoV-2. We showed age-specific changes in the expressions of microbiome functions and host proteins associated with microbiomes, providing further functional insight into the interactions between the microbiome and host in SARS-CoV-2 infection. Altogether, this study established and demonstrated the capability of metaproteomics for the study of hamster microbiomes.}, }
@article {pmid40406519, year = {2025}, author = {Song, T and Yin, L and Zhou, X and Tao, X and Tie, D and Zhang, J and Jiang, L}, title = {Microbiota profiling from biopsied tissues in complex infections: a diagnostic and prognostic analysis through metagenomic next-generation sequencing.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1567981}, pmid = {40406519}, issn = {2235-2988}, mesh = {Humans ; Male ; Retrospective Studies ; Female ; Middle Aged ; *Metagenomics/methods ; Prognosis ; *High-Throughput Nucleotide Sequencing/methods ; Biopsy ; Adult ; Aged ; *Microbiota/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; Coinfection/microbiology/diagnosis ; Fungi/isolation &amp; purification/genetics/classification ; Viruses/isolation &amp; purification/genetics/classification ; Aged, 80 and over ; Sensitivity and Specificity ; *Communicable Diseases/diagnosis/microbiology ; }, abstract = {BACKGROUND: Infectious diseases that require tissue biopsy are usually more difficult to diagnose through conventional microbiological tests (CMT), and knowledge of the infection microbiota pattern from biopsied tissues remains incomplete. Our study aimed to investigate the diagnostic and prognostic value of metagenomic next-generation sequencing (mNGS), characterize the microbiota profile from biopsied tissues, and examine its relationship with clinical outcomes.<br><br>METHODS: This retrospective cohort study included 110 patients who underwent tissue biopsy and sent both mNGS and CMT due to suspected complex infection. Microbiota patterns were illustrated via unsupervised hierarchical clustering analysis. Multivariate regression analysis was used to investigate the effect measures.<br><br>RESULTS: The sensitivity of mNGS was significantly higher than that of CMT regarding bacteria (87.23% vs 40.43%, P=0.01), viruses (100% vs 5.56%, P<0.001), and fungi (87.5% vs 28.6%, P=0.04). Polymicrobial infection accounted for 45.2% (33/73) of the infection samples. In skeletal articular biopsied tissues, Staphylococcus presented the highest mean abundance among different species of bacteria (21.2% of all bacterial reads, standard deviation (SD) 38.9). Anaerobic bacteria (24.0%, SD 25.9) represented the most common bacteria in biopsied tissue from the lung or mediastinum. The presence of gram-negative bacteria (adjusted OR 5.21, 95% CI 1.39-19.43, P=0.01), Enterobacteriaceae (adjusted OR 5.71, 95% CI 1.17-28.03, P=0.03) and Staphylococcus (adjusted OR 8.64, 95% CI 1.95-38.34, P=0.005) was associated with an increased risk of treatment failure. Early mNGS sampling within 7 days after admission was associated with a significantly decreased risk of all-cause mortality (HR 0.18, 95% CI 0.04-0.94; P=0.04), treatment failure (OR 0.17, 95% CI 0.05-0.66; P=0.01), and increased probability of clinical resolution (OR 3.03, 95% CI 1.24-7.40; P=0.01).<br><br>CONCLUSION: mNGS demonstrates significant diagnostic and prognostic efficacy in patients undergoing tissue biopsy for suspected complex infections. The presence of Gram-negative bacteria, Enterobacteriaceae, and Staphylococcus is associated with a higher probability of treatment failure, which underscores the advantage of using mNGS to guide more aggressive antibiotic strategies.}, }
@article {pmid40405096, year = {2025}, author = {Yasmin, A and Rahman, MS and Kador, SM and Ahmed, MM and Moon, MEK and Akhter, H and Sultana, M and Begum, A}, title = {Metagenomic insights into microbial diversity and potential pathogenic transmission in poultry farm environments of Bangladesh.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {318}, pmid = {40405096}, issn = {1471-2180}, mesh = {Bangladesh ; Animals ; *Bacteria/genetics/classification/isolation &amp; purification/drug effects/pathogenicity ; RNA, Ribosomal, 16S/genetics ; Farms ; *Poultry/microbiology ; *Microbiota/genetics ; *Metagenomics ; *Poultry Diseases/transmission/microbiology ; Biodiversity ; Soil Microbiology ; DNA, Bacterial/genetics ; }, abstract = {The microbiome plays a critical role in poultry health and productivity, influencing growth, immunity, and the overall farm ecosystem. This study investigated microbial diversity, antibiotic resistance pathways, and functional potential across various components of poultry ecosystems-cloacal swabs, droppings, feed, hand swabs, soil, and water-in different districts of Bangladesh. Using 16S rRNA gene amplicon sequencing, we identified 2,745 Operational Taxonomic Units (OTUs) and analyzed microbial richness, community structure, and functional pathways. Alpha diversity metrics revealed that droppings exhibited the highest microbial richness (726 OTUs in Noakhali), while feed samples showed the lowest diversity (211 OTUs). Beta diversity analysis indicated significant differences in microbial composition across sample sources, with PERMANOVA confirming that sample origin accounted for 51.45% of the variability (p < 0.001). Proteobacteria dominated the microbial communities (48.36%), followed by Firmicutes (19.83%) and Cyanobacteria (12.02%). Key genera of concern, such as Enterobacter (26.62% in hand swabs), Acinetobacter (30.87% in cloacal swabs), and Shigella (22.89% in cloacal swabs), were identified, highlighting potential contamination and zoonotic risks. Conversely, beneficial genera like Lactobacillus (36.89% in feed) and Enterococcus (10.78% in droppings) were prevalent, suggesting roles in gut health and nutrient cycling. Functional pathway analysis (KEGG) revealed that carbohydrate and amino acid metabolism were highly active in droppings and feed, reflecting nutrient utilization. Antimicrobial resistance (AMR) pathways, such as 23S rRNA-methyltransferase and multidrug efflux pumps, were widespread, with pathogenic genera (Enterobacter, Acinetobacter, Shigella, Pseudomonas) showing strong positive correlations with AMR pathways. These findings underscore the influence of environmental factors on microbial diversity and functional potential in poultry farming. The study highlights the need for improved management practices and biosecurity measures to mitigate risks associated with microbial pathogens and antimicrobial resistance, ultimately supporting healthier and more sustainable poultry production in Bangladesh.}, }
@article {pmid40405076, year = {2025}, author = {Li, J and Chen, Z and Yan, X and Chen, Q and Chen, C and Liu, H and Shen, J}, title = {Effects of USP25 knockout on the gut microbial diversity and composition in mice.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {315}, pmid = {40405076}, issn = {1471-2180}, support = {2022J011443//Natural Science Foundation of Fujian Province/ ; 2024J011450//Natural Science Foundation of Fujian Province/ ; 2024112//Medical Research Foundation of Putian University/ ; 2024104//Medical Research Foundation of Putian University/ ; 82301785//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Mice, Knockout ; Mice ; Mice, Inbred C57BL ; *Bacteria/genetics/classification/isolation &amp; purification ; Feces/microbiology ; RNA, Ribosomal, 16S/genetics ; Metagenomics ; *Ubiquitin Thiolesterase/genetics/deficiency ; Biodiversity ; Male ; }, abstract = {BACKGROUND: The gut microbiota plays a crucial role in host health. Recent study revealed that ubiquitin-specific protease 25 (USP25) deficiency affected colonic immune responses and resistance to certain bacterial infection. This study aimed to investigate the impact of USP25 gene deletion on the gut microbiota of mice, utilizing 16 S rRNA amplicon sequencing and metagenomic sequencing to provide a comprehensive analysis of microbial diversity, composition and functional characteristics.<br><br>METHODS: We collected fecal samples from 10 wild type (WT) C57BL/6J mice and 10 USP25[-/-] mice (C57BL/6J-Usp25[em1]cyagen) for 16&#xa0;S rRNA amplicon sequencing. Subsequently, the 6 of the 20 samples underwent further analysis using metagenomic sequencing.<br><br>RESULTS: Our results revealed significant differences in the gut microbiota between USP25 knockout (KO) mice and wild-type (WT) controls, with KO mice exhibiting 1,858 unique amplicon sequence variants (ASVs) compared to 1,723 in WT mice. Notably, the KO group displayed a higher tendency for biofilm formation and a greater proportion of gram-negative bacteria, while the WT group demonstrated enhanced stress tolerance and a higher presence of gram-positive bacteria. Functional prediction analyses indicated an increase in antibiotic resistance genes in the KO mice, particularly for tetracycline, cephalosporin, and sulfonamides, suggesting a potential risk for clinical antibiotic treatment efficacy. Moreover, KEGG pathway enrichment analysis revealed significant enrichment for fructose and mannose metabolism, streptomycin biosynthesis in the KO group. Furthermore, an increase in protective microbes alongside a decrease in potential pathogens in the KO microbiota hinted at altered immune responses due to USP25 deletion.<br><br>CONCLUSION: Our findings elucidate the essential role of USP25 in modulating gut microbiota composition and function, providing insights for future therapeutic strategies targeting gut microbiota in disease contexts.<br><br>CLINICAL TRAIL NUMBER: Not applicable.}, }
@article {pmid40404683, year = {2025}, author = {Terbtothakun, P and Visedthorn, S and Klomkliew, P and Chanchaem, P and Sawaswong, V and Sivapornnukul, P and Sunantawanit, S and Khamwut, A and Rotcheewaphan, S and Kaewsapsak, P and Payungporn, S}, title = {Clinical metagenomics analysis of bacterial and fungal microbiota from sputum of patients suspected with tuberculosis infection based on nanopore sequencing.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {17772}, pmid = {40404683}, issn = {2045-2322}, support = {HEA_FF_68_100_3000_016//Thailand Science research and Innovation Fund, Chulalongkorn University/ ; B05-F640122//The National Science, Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources and Institutional Development, Research and Innovation/ ; GA68/047//The Ratchadapisek Sompotch Fund, Faculty of Medicine, Chulalongkorn University/ ; }, mesh = {Humans ; *Sputum/microbiology ; *Metagenomics/methods ; *Nanopore Sequencing/methods ; *Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; *Tuberculosis/microbiology/diagnosis ; *Fungi/genetics/isolation &amp; purification/classification ; *Bacteria/genetics/classification/isolation &amp; purification ; Male ; Female ; Mycobacterium tuberculosis/genetics/isolation &amp; purification ; Middle Aged ; Adult ; }, abstract = {Tuberculosis (TB) remains a significant global health challenge, demanding rapid and comprehensive diagnostics for effective treatment. Secondary infections further complicate TB infection, worsening outcomes. Conventional diagnostics are hindered by prolonged turnaround times, high costs, and inability to detect co-infections. This study utilizes full-length 16S rDNA and internal transcribed spacer (ITS) amplicon sequencing based on Oxford Nanopore Technologies (ONT) to analyze clinical metagenomics of sputum microbiota from patients suspected with TB Infection. Our findings highlight the potential of ONT for profiling microbial communities associated with TB infection. The MTB group exhibited a significant abundance of Mycobacterium tuberculosis (M. tuberculosis) and Stenotrophomonas maltophilia. In contrast, Prevotella melaninogenica, Veillonella parvula, Corynebacterium striatum and Pseudomonas aeruginosa were more abundant in the negative samples. Fungal analysis revealed Candida orthopsilosis was enriched in MTB samples, while Aureobasidium leucospermi and Wallemia muriae predominated in negative samples. Correlation network analysis revealed M. tuberculosis exhibits positive and negative correlations with other microbial species, suggesting cooperative and competitive interactions that may influence microbial community dynamics and disease progression in TB patients. This study demonstrates the promise of ONT-based clinical metagenomics for rapid, comprehensive detection of bacterial and fungal co-infections, addressing limitations of conventional diagnostics and improving outcomes.}, }
@article {pmid40404632, year = {2025}, author = {Dillard, LR and Glass, EM and Kolling, GL and Thomas-White, K and Wever, F and Markowitz, R and Lyttle, D and Papin, JA}, title = {Genome-scale metabolic network reconstruction analysis identifies bacterial vaginosis-associated metabolic interactions.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4768}, pmid = {40404632}, issn = {2041-1723}, support = {R01-AI154242//Foundation for the National Institutes of Health (Foundation for the National Institutes of Health, Inc.)/ ; R01-AT010253//Foundation for the National Institutes of Health (Foundation for the National Institutes of Health, Inc.)/ ; NRT-ROL 2021791//Foundation for the National Institutes of Health (Foundation for the National Institutes of Health, Inc.)/ ; 1 T 32 GM 145443-1//Foundation for the National Institutes of Health (Foundation for the National Institutes of Health, Inc.)/ ; 5T32GM136615-03//U.S. Department of Health &amp; Human Services | NIH | National Institute of General Medical Sciences (NIGMS)/ ; 1842490//National Science Foundation (NSF)/ ; }, mesh = {*Vaginosis, Bacterial/microbiology/metabolism ; Humans ; Female ; *Metabolic Networks and Pathways/genetics ; Vagina/microbiology ; Microbiota/genetics ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; Metabolomics ; Metagenomics ; Genome, Bacterial ; Computer Simulation ; }, abstract = {Bacterial vaginosis (BV) is the most prevalent vaginal condition among reproductive-age women presenting with vaginal complaints. Despite its significant impact on women's health, limited knowledge exists regarding the microbial community composition and metabolic interactions associated with BV. In this study, we analyze metagenomic data obtained from human vaginal swabs to generate in silico predictions of BV-associated bacterial metabolic interactions via genome-scale metabolic network reconstructions (GENREs). While most efforts to characterize symptomatic BV (and thus guide therapeutic intervention by identifying responders and non-responders to treatment) are based on genomic profiling, our in silico simulations reveal functional metabolic relatedness between species as quite distinct from genetic relatedness. We grow several of the most common co-occurring bacteria (Prevotella amnii, Prevotella buccalis, Hoylesella timonensis, Lactobacillus iners, Fannyhessea vaginae, and Aerrococcus christenssii) on the spent media of Gardnerella species and perform metabolomics to identify potential mechanisms of metabolic interaction. Through these analyses, we identify BV-associated bacteria that produce caffeate, a compound implicated in estrogen receptor binding, when grown in the spent media of other BV-associated bacteria. These findings underscore the complex and diverse nature of BV-associated bacterial community structures and several of these mechanisms are of potential significance in understanding host-microbiome relationships.}, }
@article {pmid40401771, year = {2025}, author = {Callens, M and Le Berre, G and Van den Bulcke, L and Lolivier, M and Derycke, S}, title = {An Accessible Metagenomic Strategy Allows for Better Characterisation of Invertebrate Bulk Samples.}, journal = {Molecular ecology resources}, volume = {}, number = {}, pages = {e14126}, doi = {10.1111/1755-0998.14126}, pmid = {40401771}, issn = {1755-0998}, support = {RT/24/DNASense_ILVO//Belgian Federal Science Policy Office/ ; //Biodiversa+/ ; //Belgian Federal Public Service Economy/ ; BAR0159//Directorate-General for Regional Policy of the European Union/ ; }, abstract = {DNA-based techniques are a popular approach for assessing biodiversity in ecological research, especially for organisms which are difficult to detect or identify morphologically. Metabarcoding, the most established method for determining species composition and relative abundance in bulk samples, can be more sensitive and time- and cost-effective than traditional morphological approaches. However, one drawback of this method is PCR bias caused by between-species variation in the amplification efficiency of a marker gene. Metagenomics, bypassing PCR amplification, has been proposed as an alternative to overcome this bias. Several studies have already shown the promising potential of metagenomics, but they all indicate the unavailability of reference genomes for most species in any ecosystem as one of the primary bottlenecks preventing its wider implementation. In this study, we present a strategy that combines unassembled reads of low-coverage whole genome sequencing and publicly available reference genomes to construct a genomic reference database, thus circumventing high sequencing costs and intensive bioinformatic processing. We show that this approach is superior to metabarcoding for approximating relative biomass of macrobenthos species from bulk samples. Furthermore, these results can be obtained with a sequencing effort comparable to metabarcoding. The strategy presented here can thus accelerate the implementation of metagenomics in biodiversity assessments, as it should be relatively easy to adopt by laboratories familiar with metabarcoding and can be used as an accessible alternative.}, }
@article {pmid40399402, year = {2025}, author = {Jarmukhanov, Z and Vinogradova, E and Mukhanbetzhanov, N and Kozhakhmetov, S and Khassenbekova, D and Kushugulova, A}, title = {Parity influences postpartum adaptations in the maternal gut microbiota.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {17636}, pmid = {40399402}, issn = {2045-2322}, support = {AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; AP23489538, AP19575153, BR21882152//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; }, mesh = {Female ; Humans ; *Gastrointestinal Microbiome ; *Postpartum Period/physiology ; Pregnancy ; Adult ; *Parity ; *Adaptation, Physiological ; Bacteria/genetics/classification ; Milk, Human ; }, abstract = {The gut microbiome undergoes substantial modifications during pregnancy, yet its postpartum adaptations remain poorly understood, particularly with respect to the influence of parity. Here, we investigated the impact of childbirth history on maternal gut microbiome composition and function one month postpartum. By conducting metagenomic sequencing analysis on 60 participants (34 postpartum mothers and 26 controls), we demonstrated significant differences in microbial diversity and community structure between postpartum mothers and control, as well as subtle differences between first-time mothers and multiple-birth mothers. We identified parity-specific signatures, with first-time mothers showing enrichment in Dysosmobacter welbionis, Candidatus Saccharibacteria, and Anaerotruncus species. Functional analysis revealed distinct metabolic reprogramming patterns, including increased amino acid biosynthesis and modified fermentation pathways supporting postpartum recovery. We observed significant correlations between specific bacterial taxa and metabolic pathways, particularly in energy metabolism and immune modulation. Notably, the enhanced capacity for short-chain fatty acid production in primiparous mothers, mediated by Anaerotruncus and Dysosmobacter welbionis, suggests a potential role in shaping breast milk composition, which may influence neonatal development. These findings establish the concept of parity-dependent microbiome programming and provide insights into the biological mechanisms underlying maternal adaptation to pregnancy and childbirth.}, }
@article {pmid40397921, year = {2025}, author = {Abdillah, A and Ravaux, I and Mokhtari, S and Ranque, S}, title = {Do Malassezia yeasts colonize the guts of people living with HIV?.}, journal = {PloS one}, volume = {20}, number = {5}, pages = {e0322982}, pmid = {40397921}, issn = {1932-6203}, mesh = {Humans ; *Malassezia/isolation &amp; purification/genetics ; *HIV Infections/microbiology/complications/immunology ; Female ; Male ; Adult ; Feces/microbiology ; Middle Aged ; Immunocompromised Host ; Metagenomics ; *Gastrointestinal Microbiome ; Prospective Studies ; }, abstract = {Malassezia yeasts are commensals of human skin. In contrast to culture-based studies, metagenomic studies have detected abundant Malassezia reads in the gut, especially in patients living with HIV. Whether Malassezia colonizes and persists in the gut remains an open question. This study aimed to describe the influence of HIV-associated immunodeficiency on gut colonization by Malassezia and to assess whether Malassezia are alive. Stool samples were prospectively collected over one-five visits from ten controls and 23 patients living with HIV (10 had CD4 < 200/mm3 and 13 had CD4 > 500/mm3). Each sample was cultured and subjected to Malassezia viability PCR and both fungal and bacterial metabarcoding. Abundant M. furfur colonies were cultured from an HIV-immunocompromised patient. M. furfur and M. globosa were isolated in very low quantities from healthy volunteers. Viability Malassezia-specific qPCR was positive in three HIV-immunocompromised patients. Metagenomic analyses showed that Malassezia reads were significantly more abundant in immunocompromised patients living with HIV and erratic over time in all participants. Our findings emphasise that Malassezia are rarely cultured from human stool samples, despite the use of specific culture media. Although HIV-related immunosuppression appears to be associated with the presence of Malassezia, these yeasts do not persist and colonise the gut, even in immunocompromised patients.}, }
@article {pmid40396743, year = {2025}, author = {Zhang, T and Han, Y and Peng, Y and Deng, Z and Shi, W and Xu, X and Wu, Y and Dong, X}, title = {The risk of pathogenicity and antibiotic resistance in deep-sea cold seep microorganisms.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0157124}, pmid = {40396743}, issn = {2379-5077}, support = {No. 3502Z202373076//Natural Science Foundation of Xiamen, China/ ; No. 2023J06042//Natural Science Foundation of Fujian Province/ ; No. 42376115, No. 92351304//National Natural Science Foundation of China/ ; No. 2022025, No. 2023022//Scientific Research Foundation of Third Institute of Oceanography, MNR/ ; No. 2021R51008//Zhejiang Provincal High-level Talent Special Support Plan/ ; }, mesh = {*Bacteria/pathogenicity/genetics/drug effects ; Virulence Factors/genetics ; *Seawater/microbiology ; Metagenome ; *Drug Resistance, Bacterial/genetics ; *Drug Resistance, Microbial/genetics ; Virulence/genetics ; Anti-Bacterial Agents/pharmacology ; Interspersed Repetitive Sequences ; Geologic Sediments/microbiology ; Gene Transfer, Horizontal ; Microbiota ; }, abstract = {UNLABELLED: Deep-sea cold seeps host high microbial biomass and biodiversity that thrive on hydrocarbon and inorganic compound seepage, exhibiting diverse ecological functions and unique genetic resources. However, potential health risks from pathogenic or antibiotic-resistant microorganisms in these environments remain largely overlooked, especially during resource exploitation and laboratory research. Here, we analyzed 165 metagenomes and 33 metatranscriptomes from 16 global cold seep sites to investigate the diversity and distribution of virulence factors (VFs), antibiotic resistance genes (ARGs), and mobile genetic elements (MGEs). A total of 2,353 VFs are retrieved in 689 metagenome-assembled genomes (MAGs), primarily associated with indirect pathogenesis like adherence. In addition, cold seeps harbor nearly 100,000 ARGs, as important reservoirs, with high-risk ARGs (11.22%) presenting at low abundance. Compared to other environments, microorganisms in cold seeps exhibit substantial differences in VF and ARG counts, with potential horizontal gene transfer facilitating their spread. These virulome and resistome profiles provide valuable insights into the evolutionary and ecological implications of pathogenicity and antibiotic resistance in extreme deep-sea ecosystems. Collectively, these results indicate that cold seep sediments pose minimal public health risks, shedding light on environmental safety in deep-sea resource exploitation and research.<br><br>IMPORTANCE: In the "One Health" era, understanding pathogenicity and antibiotic resistance in vast and largely unexplored regions like deep-sea cold seeps is critical for assessing public health risks. These environments serve as critical reservoirs where resistant and virulent bacteria can persist, adapt, and undergo genetic evolution. The increasing scope of human activities, such as deep-sea mining, is disrupting these previously isolated ecosystems, heightening the potential for microbial exchange between deep-sea communities and human or animal populations. This interaction poses a significant risk for the dissemination of resistance and virulence genes, with potential consequences for global public health and ecosystem stability. This study offers the first comprehensive analysis of virulome, resistome, and mobilome profiles in cold seep microbial communities. While cold seeps act as reservoirs for diverse ARGs, high-risk ARGs are rare, and most VFs were low risk that contribute to ecological functions. These results provide a reference for monitoring the spread of pathogenicity and resistance in extreme ecosystems, informing environmental safety assessments during deep-sea resource exploitation.}, }
@article {pmid40396735, year = {2025}, author = {Zhang, J and Chen, B-Y and Zhi, M-F and Lin, W-Z and Li, Y-L and Ye, H-L and Xu, S and Zhu, H and Zhou, L-J and Du, L-J and Meng, X-Q and Liu, Y and Feng, Q and Duan, S-Z}, title = {Linking oral microbiota to periodontitis and hypertension unveils that Filifactor alocis aggravates hypertension via infiltration of interferon-γ[+] T cells.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0008425}, pmid = {40396735}, issn = {2379-5077}, support = {82330015,81991503,81991500//National Natural Science Foundation of China/ ; 2023YFA1801100,2023YFA1801104//National Key Research and Development Program of China/ ; BX20230226//China National Postdoctoral Program for Innovative Talents/ ; SHSMU-ZDCX20212500//Innovative Research Team of High-level Local University in Shanghai (Innovative Research Team of High-level Local Universities in Shanghai)/ ; }, mesh = {*Hypertension/microbiology/immunology/complications ; *Periodontitis/microbiology/complications/immunology ; Humans ; Animals ; *Interferon-gamma/metabolism ; *Microbiota ; Male ; Mice ; Female ; Middle Aged ; *Clostridiales ; *T-Lymphocytes/immunology/metabolism ; *Mouth/microbiology ; Saliva/microbiology ; Disease Models, Animal ; }, abstract = {UNLABELLED: Periodontal disease (PD), an inflammatory disease initiated by oral microbiota, may aggravate hypertension (HTN). Few studies were employed to characterize the oral microbiota in hypertensive patients with periodontitis. To investigate the interplay between oral microbiota and hypertension in individuals with periodontitis, we initiated a metagenomic sequencing study on subgingival plaque and saliva samples sourced from HTN patients and those with hypertension and periodontitis (PDHTN). Our primary objective was to characterize species serving as pivotal links (bridge species) in exacerbating hypertension induced by periodontal disease. Within subgingival plaque and saliva specimens, we pinpointed 31 and 28 bridge species, respectively. Furthermore, we noted a decrease in the abundance of nitrate-reducing bacteria, such as Actinomyces spp., Rothia spp., and Veillonella spp., in PDHTN samples. Employing network analysis, we distinguished distinct polymicrobial clusters within the two patient groups. These bridge species coalesced into polymicrobial clusters, revealing intricate symbiotic and competitive relationships. To substantiate our findings, we leveraged an angiotensin II-infused animal model of ligature-induced periodontitis (LIP), confirming the contributory role of Filifactor alocis-a selectively analyzed subgingival bridge species-in exacerbating hypertension and upregulating the frequency of renal CD4[+]IFNγ[+] and CD8[+]IFNγ[+] T cells. Our study screened a list of species linking PD and HTN. PD may aggravate HTN by decreasing the abundance of nitrate-reducing bacteria and increasing the abundance of pathogens. Using an animal model, we demonstrated that F. alocis aggravates HTN via the accumulation of IFNγ[+] T cells in the kidneys.<br><br>IMPORTANCE: Both periodontal disease and hypertension are widely prevalent all over the world. PD may aggravate the development of HTN via oral microbiota. However, few studies were employed to characterize the oral microbiota in hypertensive patients with periodontitis. Here, the present study profiled the oral microbiota in hypertensive participants with periodontitis. We found that the depleted abundance of nitrate-reducing bacteria and the enriched abundance of pathogens. Finally, we validated the role of Filifactor alocis in exacerbating HTN via infiltration of IFN&#x3b3;[+] T cells in mice kidneys. Our study improved the understanding of oral microbiota linking PD and HTN.}, }
@article {pmid40396732, year = {2025}, author = {Xin, T and Ye, Q and Hu, D}, title = {A relationship between body size and the gut microbiome suggests a conservation strategy.}, journal = {Microbiology spectrum}, volume = {}, number = {}, pages = {e0029425}, doi = {10.1128/spectrum.00294-25}, pmid = {40396732}, issn = {2165-0497}, abstract = {A key goal of conservation is to protect the biodiversity of wild species to support their continued evolution and survival. Conservation practice has long been guided by genetic, ecological, and demographic indicators of risk. Cope's rule suggests that species tend to evolve larger body sizes over time. Here, we provide strong evidence to support the inclusion of body size when formulating wildlife conservation strategies. The gut microbiome can mirror the physiological and environmental adaptation status of the host. This study established a connection between body size and the gut microbiome in the Felidae family using 70 fecal samples collected from 18 individuals through metagenomic data analysis and mining metagenome-assembled genomes (MAGs). Two enterotypes were identified in the Felidae gut: Bacteroides and Clostridium. Medium-sized felids predominantly harbored Clostridium, associated with pathogenicity, whereas large and small felids harbored both beneficial Bacteroides and pathogenic Clostridium. Species that evolved larger body sizes over time exhibited distinct changes in gut microbial communities, such as enhanced nutrient extraction and metabolic capabilities. Larger felids exhibited a more diverse, stable gut microbiome engaged in metabolic processes and extensive host interactions, indicating an evolved functional role in various biological processes. Conversely, that of smaller felids is less diverse, with more viruses and pathogenic elements primarily involved in chemical synthesis. These findings provide essential insights for developing conservation strategies that consider the nutritional needs of different-sized feline species, control the transmission of pathogens, and allocate resources based on their unique gut microbiome characteristics.IMPORTANCEBody size is a fundamental trait that varies greatly among taxa and has important implications for life history and ecology. Cope's rule suggests that species tend to evolve larger body sizes over time. However, its correlation to body size evolution remains unclear. This study aimed to establish a connection between body size and the gut microbiome in the Felidae family through metagenomic data analysis. Our results support Cope's rule, illustrating that increased body size correlates with shifts in the gut microbiome, enhancing survival and adaptability.}, }
@article {pmid40396204, year = {2025}, author = {Zöggeler, T and Kavallar, AM and Pollio, AR and Aldrian, D and Decristoforo, C and Scholl-Bürgi, S and Müller, T and Vogel, GF}, title = {Meta-analysis of shotgun sequencing of gut microbiota in obese children with MASLD or MASH.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2508951}, pmid = {40396204}, issn = {1949-0984}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Child ; *Bacteria/classification/genetics/isolation &amp; purification ; Feces/microbiology ; *Pediatric Obesity/microbiology/complications ; *Fatty Liver/microbiology ; Male ; Metagenomics ; Female ; *Obesity/microbiology ; Adolescent ; Shotgun Sequencing ; }, abstract = {Alterations in the gut microbiome affect the development and severity of metabolic dysfunction-associated steatotic liver disease (MASLD) or metabolic dysfunction-associated steatohepatitis (MASH). We analyzed microbiomes of obese children with and without MASLD, MASH, and healthy controls. Electronic databases were searched for studies on the gut microbiome in children with obesity with/without MASLD or MASH, providing shotgun-metagenomic-sequencing data. Nine studies and an additionally recruited cohort were included. Fecal microbiomes of children with MASLD (n = 153) and MASH (n = 70) were significantly different in alpha- and beta-diversity (p < 0.001) compared to obese (n = 58) and healthy (n = 132). Species Faecalibacterium_prausnitzii and Prevotella_copri are differentially abundant between obese, MASLD and MASH groups. XGBoost and random forest-models accurately predict MASLD over obesity with an AUROC of 87% and MASH over MASLD with 89%. Pathway-abundance-based models accurately predict MASLD over obesity with an AUROC of 81% and MASH over MASLD with 88%. The composition of the gut microbiome is altered with increasing hepatic fibrosis and concomitant species-abundance increase of Prevotella_copri (p = 0.0082). Machine-learning models discriminate pediatric from adult MASH with an AUROC of 97%. The gut microbial composition is increasingly altered in children with the progression of MASLD toward MASH. This can be utilized as a fecal biomarker and highlights the impact of diet on the gut microbiome for disease intervention.}, }
@article {pmid40393758, year = {2025}, author = {Jiang, JY and Fan, ZX and Yang, F and Liu, HM and Mao, M and Feng, L and Xiong, F and Li, P}, title = {[Composition of gut microbiota and characteristics of virulence factors genes in overweight or obese children and their relationship with liver metabolic inflammation].}, journal = {Zhonghua er ke za zhi = Chinese journal of pediatrics}, volume = {63}, number = {6}, pages = {642-648}, doi = {10.3760/cma.j.cn112140-20241128-00873}, pmid = {40393758}, issn = {0578-1310}, support = {2023YFS0034//Key R&amp;D Project of Science and Technology Department of Sichuan Province/ ; }, mesh = {Humans ; Male ; Female ; Child ; *Gastrointestinal Microbiome/genetics ; *Virulence Factors/genetics ; Case-Control Studies ; *Pediatric Obesity/microbiology/metabolism ; *Overweight/microbiology/metabolism ; Feces/microbiology ; Inflammation/metabolism ; *Liver/metabolism ; *Obesity/microbiology ; Body Mass Index ; }, abstract = {Objective: To explore the composition of gut microbiome, the characteristics of virulence factor genes and their relationship with liver metabolic inflammation in overweight or obese children. Methods: A case-control design was conducted. From the children who visited the West China Second University Hospital of Sichuan University for medical or physical examinations between August 2021 and April 2022, a total of 23 obese children (obesity group), 8 overweight children (overweight group), and 22 healthy children (control group) were recruited. The body mass index of children was calculated after anthropometric measurements; metabolic inflammation indexes such as the levels of fasting blood glucose and hepatic function and renal function etc. were detected. The composition and abundance of gut microbiota in the feces of the children were detected by metagenomic sequencing technology and the Shannon index and Simpson index were calculated to assess the α diversity of virulence factor genes. The Wilcoxon rank-sum test was used for pairwise comparison between groups. The Spearman's rank correlation test was used for correlation analysis, and the Benjamini-Hochberg method was used to correct the P-value of multiple tests. Results: The obese group included 23 children aged 8.5 (6.3, 11.8) years, of whom 9 (39%) were male. The overweight group consisted of 8 children aged 9.2 (5.5, 12.3) years, of whom 4 were male. The control group comprised 22 children aged 5.3 (5.1, 5.4) years, of whom 10 (45%) were male. The obese group exhibited higher levels of alanine aminotransferase (ALT), gamma-glutamyl transferase (γ-GT), globulin, and uric acid compared to those of the control group (all P<0.05), with ALT also higher than that of the overweight group (P<0.05). The levels of fasting blood glucose, γ-GT, globulin, and uric acid in the overweight group were all higher than those in the control group (all P<0.05). The abundance of Coprococcus A (0.76 (0.00, 3.11) vs. 0.00 (0.00, 0.00), false discovery rate (FDR)<0.05) and Parasutterella (0.89 (0.08, 1.79) vs. 0.00 (0.00, 0.08), FDR<0.05) in the gut of children in the obese group were both higher than those of the control group. The number of virulence factor genes in the obese group was higher than those of the control group (941 (886, 977) vs. 890 (807, 920), P<0.05). The Simpson index and Shannon index of gut microbial virulence factor genes in the obese group were both higher than those of the control group (0.993 (0.992, 0.993) vs. 0.991(0.990, 0.991), (5.50 (5.46, 5.56) vs. 5.37 (5.30, 5.43), both P<0.01). The abundance of gut microbiota virulence factors genes all showed positive correlations with fasting blood glucose, ALT, γ-GT, and uric acid levels in children (all r>0.3, all FDR<0.05). The abundance of 17 gut microbial virulence factor genes were all positively associated with γ-GT levels (all r>0.3, all FDR<0.05). The virulence factor genes (LpxH, LpxB, LpxK) of lipopolysaccharide were all positively correlated with plasma γ-GT and globulin levels (all r>0.3, all FDR<0.05). Conclusions: Overweight or obese children exhibited elevated liver metabolic-inflammatory markers compared to their normal-weight counterparts. Notably, obese children demonstrated gut microbiota dysbiosis accompanied by enrichment of virulence factor genes, which may promote liver metabolic inflammation through pathways such as lipopolysaccharide biosynthesis.}, }
@article {pmid40392941, year = {2025}, author = {Feng, C and Liang, Z and Liao, X and Lin, K and Zhai, Y and Liu, G and Malpei, F and Hu, A}, title = {Microbial Dynamics on Different Microplastics in Coastal Urban Aquatic Ecosystems: The Critical Roles of Extracellular Polymeric Substances.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {21}, pages = {10554-10566}, pmid = {40392941}, issn = {1520-5851}, mesh = {*Microplastics ; Ecosystem ; Extracellular Polymeric Substance Matrix ; Bacteria ; Water Pollutants, Chemical ; Microbiota ; }, abstract = {Microplastics (MPs) serve as carriers for microbial community colonization, forming unique ecosystems known as plastispheres in urban aquatic ecosystems. However, interactions among microbes, extracellular polymeric substances (EPS), and MPs remain poorly understood. This study investigates microbial consortia and their EPS secretion behaviors across various plastispheres at two representative coastal urban water sites. Permutational multivariate analysis of variance revealed that MP type significantly influenced microbial community structures in reservoir environments (R[2] = 0.60, p < 0.001), highlighting the pronounced impact of MP types in high-quality urban waters. Specific microbial phyla and genera were identified as key contributors to EPS compositional variations across different plastispheres. Hierarchical partitioning results identified Acidobacteria, Nitrospirae, and Planctomycetes as influential phyla positively affecting EPS composition. Spearman correlation analysis pinpointed Robiginitialea (positive correlation) and Fimbriiglobus (negative correlation) as critical genera influencing EPS dynamics. Moreover, EPS-related gene abundance corresponded closely with observed EPS compositional differences. Dominant genes associated with protein biosynthesis included xapD in reservoirs and glnA in bays, while glmS and eno were predominant for polysaccharide biosynthesis in bays. This research advances our understanding of microbial-EPS-MP interactions in urban water systems, offering critical insights into ecological remediation and risk assessment of MP pollution.}, }
@article {pmid40392071, year = {2025}, author = {You, Q and Wang, K and Zhao, Z and Zhou, H and Lan, Z and Liang, H and Deng, R and Li, W and Shen, S and Wang, R and Zhang, K and Zheng, D and Sun, J}, title = {Reduction of Bacteroides fragilis in Gut Microbiome of Chronic Hepatitis B Patients Promotes Liver Injury.}, journal = {Journal of medical virology}, volume = {97}, number = {5}, pages = {e70395}, doi = {10.1002/jmv.70395}, pmid = {40392071}, issn = {1096-9071}, support = {//This study was supported by the Guangzhou Science and Technology Plan Project (Grant 2024B03J0326), the Guangdong Basic and Applied Basic Research Foundation of Guangzhou Joint Fund (Grant 2022B1515120039), the National Natural Science Foundation of China (Grant U22A20274), and the Guangdong Basic and Applied Basic Research Foundation (Grant 2023A1515010437)./ ; }, mesh = {Humans ; *Bacteroides fragilis/isolation &amp; purification/genetics ; *Gastrointestinal Microbiome ; *Hepatitis B, Chronic/microbiology/complications/pathology ; Male ; Female ; Adult ; Case-Control Studies ; Animals ; Middle Aged ; Mice ; Liver/pathology ; Alanine Transaminase/blood ; Metagenomics ; Disease Models, Animal ; }, abstract = {In chronic hepatitis B (CHB) patients under antiviral treatment, liver injury, as evidenced by elevated alanine transaminase (ALT), is associated with unfavorable outcomes and needs effective treatment. The interaction between gut microbiota and liver injury in CHB patients remains unclear. Using a case-control design, 28 cases with elevated ALT and 28 matched controls with normal ALT were randomly selected from CHB patients with viral control. Clinical characteristics were comparable between groups. Metagenomic sequencing revealed that Bacteroides fragilis was decreased in cases and exhibited the greatest disparity between cases and controls. Mice colonized by gut microbiota from cases exhibited more severe liver damage in both LPS-induced and MCD diet-induced liver injury models, and had a lower abundance of B. fragilis compared to mice colonized by gut microbiota from controls. Oral gavage of B. fragilis improved both LPS-induced and MCD diet-induced liver injury. Metabolomics analysis revealed that the levels of 7-Ketolithocholic acid (7-Keto-LCA) were positively correlated with B. fragilis and significantly increased in the cultural supernatant of B. fragilis. Consistently, 7-Keto-LCA exerted protective effects against both LPS-induced and MCD diet-induced liver damage. Targeting gut microbiota might be a promising therapeutic treatment for alleviation residual liver inflammation in CHB patients with viral control.}, }
@article {pmid40391895, year = {2025}, author = {Hillege, LE and Trepka, KR and Guthrie, BGH and Fu, X and Aarnoutse, R and Paymar, MR and Olson, C and Zhang, C and Ortega, E and Ramirez, L and de Vos-Geelen, J and Valkenburg-van Iersel, L and van Hellemond, IEG and Baars, A and Vestjens, JHMJ and Penders, J and Deutschbauer, A and Atreya, CE and Kidder, WA and Smidt, ML and Ziemons, J and Turnbaugh, PJ}, title = {Microbial vitamin biosynthesis links gut microbiota dynamics to chemotherapy toxicity.}, journal = {mBio}, volume = {16}, number = {6}, pages = {e0093025}, pmid = {40391895}, issn = {2150-7511}, support = {R01HL122593/HL/NHLBI NIH HHS/United States ; R01 CA255116/CA/NCI NIH HHS/United States ; R01 DK114034/DK/NIDDK NIH HHS/United States ; R01DK114034/DK/NIDDK NIH HHS/United States ; R01 HL122593/HL/NHLBI NIH HHS/United States ; R01CA255116/CA/NCI NIH HHS/United States ; 58-8050-3-003//U.S. Department of Agriculture/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Colorectal Neoplasms/drug therapy/microbiology ; *Capecitabine/adverse effects/therapeutic use ; *Vitamin K 2/metabolism ; Feces/microbiology/chemistry ; *Antineoplastic Agents/adverse effects/therapeutic use ; Female ; Male ; *Vitamins/biosynthesis ; Escherichia coli/drug effects/metabolism/genetics ; Bacteria/metabolism/genetics/drug effects ; Middle Aged ; Metagenomics ; }, abstract = {Dose-limiting toxicities pose a major barrier to cancer treatment. While preclinical studies show that the gut microbiota influences and is influenced by anticancer drugs, data from patients paired with careful side effect monitoring remains limited. Here, we investigate capecitabine (CAP)-microbiome interactions through longitudinal metagenomic sequencing of stool from 56 advanced colorectal cancer patients. CAP significantly altered the gut microbiome, enriching for menaquinol (vitamin K2) biosynthesis genes. Transposon library screens, targeted gene deletions, and media supplementation revealed that menaquinol biosynthesis protects Escherichia coli from drug toxicity. Stool menaquinol gene and metabolite levels were associated with decreased peripheral sensory neuropathy. Machine learning models trained in this cohort predicted toxicities in an independent cohort. Taken together, these results suggest treatment-associated increases in microbial vitamin biosynthesis serve a chemoprotective role for bacterial and host cells. Further, our findings provide a foundation for in-depth mechanistic dissection, human intervention studies, and extension to other cancer treatments.IMPORTANCESide effects are common during the treatment of cancer. The trillions of microbes found within the human gut are sensitive to anticancer drugs, but the effects of treatment-induced shifts in gut microbes for side effects remain poorly understood. We profiled gut microbes in colorectal cancer patients treated with capecitabine and carefully monitored side effects. We observed a marked expansion in genes for producing vitamin K2 (menaquinone). Vitamin K2 rescued gut bacterial growth and was associated with decreased side effects in patients. We then used information about gut microbes to develop a predictive model of drug toxicity that was validated in an independent cohort. These results suggest that treatment-associated increases in bacterial vitamin production protect both bacteria and host cells from drug toxicity, providing new opportunities for intervention and motivating the need to better understand how dietary intake and bacterial production of micronutrients like vitamin K2 influence cancer treatment outcomes.}, }
@article {pmid40391128, year = {2025}, author = {Yatera, K and Wang, Z and Shibata, Y and Ishikawa, N and Homma, T and Fukushima, K and Hataji, O and Inoue, Y and Kawabata, H and Miki, K and Sato, K and Tobino, K and Yoshida, M and Ishii, T and Ito, R and Kobayashi, T and Kawamatsu, S and Compton, CH and Jones, PW}, title = {Sputum Microbiome, Potentially Pathogenic Organisms, and Clinical Outcomes in Japanese Patients with COPD and Moderate Airflow Limitation: The Prospective AERIS-J Study.}, journal = {International journal of chronic obstructive pulmonary disease}, volume = {20}, number = {}, pages = {1477-1492}, pmid = {40391128}, issn = {1178-2005}, mesh = {Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; *Bacteria/pathogenicity/genetics/isolation &amp; purification ; Disease Progression ; Forced Expiratory Volume ; Japan/epidemiology ; *Lung/microbiology/physiopathology ; *Microbiota ; Prospective Studies ; *Pulmonary Disease, Chronic Obstructive/microbiology/physiopathology/diagnosis ; Severity of Illness Index ; *Sputum/microbiology ; East Asian People ; }, abstract = {BACKGROUND: In Western studies, lung microbiome changes are reported in patients with chronic obstructive pulmonary disease (COPD) and are associated with poorer outcomes, but similar studies in Asian patients or those with less severe COPD are limited.<br><br>METHODS: The Acute Exacerbation and Respiratory InfectionS in COPD Japan (AERIS-J; jRCT1080224632/NCT03957577) was a prospective, non-interventional study to evaluate sputum microbiome diversity at baseline and after 12 months (V2; exploratory analysis), in patients aged 40-80 years with stable COPD (June 2019-June 2022). Baseline sputum potentially pathogenic organisms (PPOs) were identified. Blood cell counts and COPD Assessment Test (CAT) scores were collected at baseline and COPD symptoms measured over 12 months using the Evaluating Respiratory Symptoms in COPD and EXAcerbations of Chronic pulmonary disease Tool, collected by eDiary.<br><br>RESULTS: Patients (N=63) had a mean age of 72.8 years, and percent predicted post-bronchodilator forced expiratory volume in 1 second was 58.3%; 92% were male. Across 62 baseline sputum samples, microbiome composition was similar between 16S rRNA/metagenomic datasets. Patients graded Global Initiative for Chronic Obstructive Lung Disease (GOLD) III versus GOLD I/II had minimal differences in their microbial taxonomic profile and no differences in microbial diversity (Wilcoxon P=0.71). Alpha diversity (Shannon index) positively correlated with blood basophils (rho=0.41; P=0.0019) and negatively correlated with CAT score (rho=0.36; P=0.0069). Alpha diversity and sputum (rho: -0.0637; P=0.7836) or blood (rho: 0.1739; P=0.2043) eosinophils were not correlated. No difference in alpha (P=0.5) or beta (P=0.3) diversity or Operational Taxonomic Unit (Anosim R=-0.024; P=0.892) was observed between PPO-positive or -negative sputum.<br><br>CONCLUSION: A less diverse microbiome correlated with poorer health status and lower blood basophils in patients with COPD and moderate airflow limitation. There was no relationship between PPO presence and microbiome diversity.}, }
@article {pmid40390177, year = {2025}, author = {Ren, Z and Wang, M and Yu, J and Zhang, L and Lin, Z and Li, X and Zhang, Y}, title = {Unearthing Vertical Stratified Archaeal Community and Associated Methane Metabolism in Thermokarst Sediments.}, journal = {Environmental microbiology}, volume = {27}, number = {5}, pages = {e70110}, doi = {10.1111/1462-2920.70110}, pmid = {40390177}, issn = {1462-2920}, support = {42301132//National Natural Science Foundation of China/ ; NKL2023-QN02//Key Laboratory of Lake and Watershed Science for Water Security/ ; }, mesh = {*Methane/metabolism ; *Geologic Sediments/microbiology ; *Archaea/metabolism/classification/genetics/isolation &amp; purification ; *Lakes/microbiology ; Phylogeny ; Biodiversity ; Tibet ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Thermokarst lakes are hotspots for greenhouse gas emissions across the Arctic and Qinghai-Tibet Plateau. Investigating the vertical stratification of archaeal communities in thermokarst lake sediments is essential for understanding their ecological roles and contributions to methane production. Here, we analysed archaeal communities along a depth gradient in thermokarst lake sediments. Alpha diversity (richness and Shannon index) generally decreased with depth. Euryarchaeota was the most abundant phylum, though its relative abundance declined with depth, while Thaumarchaeota increased. At the order level, Methanosarcinales and Nitrosopumilales showed increased relative abundance with depth, indicating adaptation to deeper anoxic layers, whereas Methanomicrobiales and Methanotrichales decreased. Beta diversity increased with depth, shifting from stochastic to deterministic processes. Network topology revealed reduced species connectivity but heightened modularity at depth, signalling niche specialisation. Functionally, genes associated with the initial steps of methane metabolism (Fwd, Mtd, Mer) increased with depth, while those involved in later steps (Mtr, Mcr) decreased, suggesting reduced energy conservation efficiency and lower overall methanogenesis rates in deeper sediments. These findings highlight the significant impact of vertical stratification on archaeal community structure, interaction networks, and functional capabilities.}, }
@article {pmid40390128, year = {2025}, author = {Liao, H and Wen, C and Huang, D and Liu, C and Gao, T and Du, Q and Yang, QE and Jin, L and Ju, F and Yuan, MM and Tang, X and Yu, P and Zhou, S and Alvarez, PJ and Friman, VP}, title = {Harnessing phage consortia to mitigate the soil antibiotic resistome by targeting keystone taxa Streptomyces.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {127}, pmid = {40390128}, issn = {2049-2618}, support = {42277357//National Natural Science Foundation of China/ ; }, mesh = {*Streptomyces/virology/genetics/drug effects ; *Soil Microbiology ; *Bacteriophages/physiology/genetics ; Metagenomics/methods ; Microbiota/genetics ; Anti-Bacterial Agents/pharmacology ; Soil/chemistry ; China ; *Drug Resistance, Bacterial/genetics ; Sewage/virology ; }, abstract = {BACKGROUND: Antimicrobial resistance poses a substantial and growing threat to global health. While antibiotic resistance genes (ARGs) are tracked most closely in clinical settings, their spread remains poorly understood in non-clinical environments. Mitigating the spread of ARGs in non-clinical contexts such as soil could limit their enrichment in food webs.<br><br>RESULTS: Multi-omics (involving metagenomics, metatranscriptomics, viromics, and metabolomics) and direct experimentation show that targeting keystone bacterial taxa by phages can limit ARG maintenance and dissemination in natural soil environments. Based on the metagenomic analysis, we first show that phages from activated sludge can regulate soil microbiome composition and function in terms of reducing ARG abundances and changing the bacterial community composition. This effect was mainly driven by a reduction in the abundance and activity of Streptomyces genus, which is well known for encoding both antibiotic resistance and synthesis genes. To validate the significance of this keystone species for the loss of ARGs, we enriched phage consortia specific to Streptomyces and tested their effect on ARG abundances on 48 soil samples collected across China. We observed a consistent reduction in ARG abundances across all soils, confirming that Streptomyces-enriched phages could predictably change the soil microbiome resistome and mitigate the prevalence of ARGs. This study highlights that phages can be used as ecosystem engineers to control the spread of antibiotic resistance in the environment.<br><br>CONCLUSION: Our study demonstrates that some bacterial keystone taxa are critical for ARG maintenance and dissemination in soil microbiomes, and opens new ecological avenues for microbiome modification and resistome control. This study advances our understanding of how metagenomics-informed phage consortia can be used to predictably regulate soil microbiome composition and functioning by targeting keystone bacterial taxa. Video Abstract.}, }
@article {pmid40390033, year = {2025}, author = {Teng, T and Huang, F and Xu, M and Li, X and Zhang, L and Yin, B and Cai, Y and Chen, F and Zhang, L and Zhang, J and Geng, A and Chen, C and Yu, X and Sui, J and Zhu, ZJ and Guo, K and Zhang, C and Zhou, X}, title = {Microbiota alterations leading to amino acid deficiency contribute to depression in children and adolescents.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {128}, pmid = {40390033}, issn = {2049-2618}, support = {82301714//the National Natural Science Foundation of China/ ; 22425404//the National Natural Science Foundation of China/ ; 82271565//the National Natural Science Foundation of China/ ; 2023TQ0398//the China Postdoctoral Science Foundation/ ; CSTB2023NSCQ-BHX0106//Natural Science Foundation of Chongqing, China/ ; 2208013341918508//Postdoctoral Innovation Talents Support Program of Chongqing, China/ ; 2022YFC3400702//National Key R&amp;D Program of China/ ; 2024YFC2707800//National Key R&amp;D Program of China/ ; 2022ZD0212900//STI2030-Major Projects/ ; }, mesh = {Humans ; Adolescent ; Child ; *Gastrointestinal Microbiome/physiology ; Male ; *Depressive Disorder, Major/microbiology/metabolism ; Female ; *Amino Acids/deficiency/blood/metabolism ; Magnetic Resonance Imaging ; Animals ; Rats ; Brain/diagnostic imaging/metabolism ; Feces/microbiology ; Metagenomics/methods ; Metabolomics/methods ; *Depression/microbiology ; }, abstract = {BACKGROUND: Major depressive disorder (MDD) in children and adolescents is a growing global public health concern. Metabolic alterations in the microbiota-gut-brain (MGB) axis have been implicated in MDD pathophysiology, but their specific role in pediatric populations remains unclear.<br><br>RESULTS: We conducted a multi-omics study on 256 MDD patients and 307 healthy controls in children and adolescents, integrating plasma metabolomics, fecal metagenomics, and resting-state functional magnetic resonance imaging (rs-fMRI) of the brain. KEGG enrichment analysis of 360 differential expressed metabolites (DEMs) indicated significant plasma amino acid (AA) metabolism deficiencies (p-value&#x2009;<&#x2009;0.0001). We identified 58 MDD-enriched and 46 MDD-depleted strains, as well as 6 altered modules in amino acid metabolism in fecal metagenomics. Procrustes analysis revealed the association between the altered gut microbiome and circulating AA metabolism (p-value&#x2009;=&#x2009;0.001, M[2]&#x2009;=&#x2009;0.932). Causal analyses suggested that plasma AAs might mediate the impact of altered gut microbiota on depressive and anxious symptoms. Additionally, rs-fMRI revealed that connectivity deficits in the frontal lobe are associated with depression and 22 DEMs in AA metabolism. Furthermore, transplantation of fecal microbiota from MDD patients to adolescent rats induced depressive-like behaviors and 14 amino acids deficiency in the prefrontal cortex (PFC). Moreover, the dietary lysine restriction increased depression susceptibility in adolescent rats by reducing the expression of excitatory amino acid transporters in the PFC.<br><br>CONCLUSIONS: Our findings highlight that gut microbiota alterations contribute to AAs deficiency, particularly lysine, which plays a crucial role in MDD pathogenesis in children and adolescents. Targeting AA metabolism may offer novel therapeutic strategies for pediatric depression. Video Abstract.}, }
@article {pmid40389724, year = {2025}, author = {Yang, M and Qi, Y and Gao, P and Li, L and Guo, J and Zhao, Y and Liu, J and Chen, Z and Yu, L}, title = {Changes in the assembly and functional adaptation of endophytic microbial communities in Amorphophallus species with different levels of resistance to necrotrophic bacterial pathogen stress.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {766}, pmid = {40389724}, issn = {2399-3642}, support = {202449CE340009, 202201AU070043, 202101BA070001-174//Yunnan Provincial Science and Technology Department (Yunnan Department of Science and Technology)/ ; 202501AU070008//Yunnan Provincial Science and Technology Department (Yunnan Department of Science and Technology)/ ; 2025J0753//Yunnan Provincial Department of Education (Department of Education, Yunnan Province)/ ; 2023J0827//Yunnan Provincial Department of Education (Department of Education, Yunnan Province)/ ; }, mesh = {*Endophytes/physiology ; *Plant Diseases/microbiology ; *Amorphophallus/microbiology ; *Microbiota ; *Disease Resistance ; *Adaptation, Physiological ; Stress, Physiological ; *Bacteria ; }, abstract = {Pcc is one of the key pathogenic factors responsible for destructive soft rot in konjac. To date, the assembly and functional adaptation of the plant endophytic microbiome under Pcc stress remain poorly understood. Here, we found that Pcc stress leads to rapid reorganization of the endogenous microbiome in multiple organs of both susceptible and resistant konjac plants. Under Pcc stress, the negative interactions within the bacterial-fungal interdomain network intensified, suggesting an increase in ecological competition between bacterial and fungal taxa. We further discovered that the relative abundance dynamics of the classes Dothideomycetes and Sordariomycetes, as core fungal taxa, changed in response to Pcc stress. By isolating culturable microorganisms, we demonstrated that 46 fungal strains strongly inhibited the growth of Pcc. This implies that endophytic fungal taxa in konjac may protect the host plant through ecological competition or by inhibiting the growth of pathogenic bacteria. Metagenomic analysis demonstrated that microbial communities associated with resistant Amorphophallus muelleri exhibited unique advantages over susceptible Amorphophallus konjac in enhancing environmental adaptability, regulating plant immune signaling, strengthening cell walls, and inducing defense responses. Our work provides important evidence that endophytic fungal taxa play a key role in the host plant's defense against necrotizing bacterial pathogens.}, }
@article {pmid40389466, year = {2025}, author = {Salehi, M and Laitinen, V and Bhanushali, S and Bengtsson-Palme, J and Collignon, P and Beggs, JJ and Pärnänen, K and Lahti, L}, title = {Gender differences in global antimicrobial resistance.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {79}, pmid = {40389466}, issn = {2055-5008}, support = {952914//European Union's Horizon 2020 research and innovation programme/ ; 952914//European Union's Horizon 2020 research and innovation programme/ ; 952914//European Union's Horizon 2020 research and innovation programme/ ; 952914//European Union's Horizon 2020 research and innovation programme/ ; 330887//Research Council of Finland,Finland/ ; 330887//Research Council of Finland,Finland/ ; 348439//Research Council of Finland,Finland/ ; 330887//Research Council of Finland,Finland/ ; 20220114//Alhopuro Foundation/ ; 20220114//Alhopuro Foundation/ ; 2019-00299//Swedish Research Council/ ; FFL21-0174//Swedish Foundation for Strategic Research/ ; KAW 2020.0239//Data-Driven Life Science/ ; }, mesh = {Humans ; Female ; Male ; Sex Factors ; *Anti-Bacterial Agents/pharmacology ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; *Gastrointestinal Microbiome/genetics ; Adult ; *Drug Resistance, Bacterial/genetics ; Metagenome ; Global Health ; Middle Aged ; }, abstract = {Antimicrobial resistance is one of the leading causes of mortality globally. However, little is known about the distribution of antibiotic resistance genes (ARGs) in human gut metagenomes, collectively referred to as the resistome, across socio-demographic gradients. In particular, limited evidence exists on gender-based differences. We investigated how the resistomes differ between women and men in a global dataset of 14,641 publicly available human gut metagenomes encompassing countries with widely variable economic statuses. We observed a 9% higher total ARG load in women than in men in high-income countries. However, in low- and middle-income countries, the difference between genders was reversed in univariate models, but not significant after adjusting for covariates. Interestingly, the differences in ARG load between genders emerged in adulthood, suggesting resistomes differentiate between genders after childhood. Collectively, our data-driven analyses shed light on global, gendered antibiotic resistance patterns, which may help guide further research and targeted interventions.}, }
@article {pmid40388589, year = {2025}, author = {Lei, Z and Wang, H and Zhang, H and Liu, W and He, Z and Wang, Z and Zhang, H and Wang, Y and Tang, Y and Hu, C and Zhao, X}, title = {Sultr1;2-Mediated Recruitment of Selenium-Oxidizing Bacteria Promotes Plant Selenium Uptake.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {22}, pages = {13313-13326}, doi = {10.1021/acs.jafc.5c01540}, pmid = {40388589}, issn = {1520-5118}, mesh = {*Selenium/metabolism ; *Solanum lycopersicum/metabolism/microbiology/genetics/growth &amp; development ; Oxidation-Reduction ; Soil Microbiology ; *Methylobacterium/metabolism/genetics/isolation &amp; purification ; *Bacterial Proteins/metabolism/genetics ; Plant Roots/microbiology/metabolism ; Soil/chemistry ; Microbiota ; }, abstract = {Plants can shape their root microbiome to promote growth and selenium uptake. Here, we used metagenomics, 16S high-throughput sequencing, and liquid chromatography-mass spectrometry (LC-MS) metabolomics assays to investigate the role of Sultr1;2, which is the major selenium transporter gene, in recruiting microbial communities to regulate soil selenium bioavailability and plant selenium uptake. Results shows that the overexpression of Sultr1;2 in tomato significantly enriched Methylobacterium genus. The isolated strains of Methylobacterium possess multiple plant-growth-promoting functions and selenium oxidation capability and inoculation with these strains increases soil selenium availability. The upregulated metabolites of Sultr1;2-overexpressing tomato were significantly enriched in the arginine and proline metabolism pathway. The key upregulated metabolites significantly improved the growth rate and selenium-oxidizing ability of Methylobacterium strains, and the combined addition of key upregulated metabolites and synthetic microbial community significantly increased soil selenium bioavailability and plant selenium uptake. This study provides insights into leveraging plant genetic engineering to identify key functional microbial communities for sustainable selenium-rich agricultural development.}, }
@article {pmid40388544, year = {2025}, author = {Kohnert, E and Kreutz, C}, title = {Benchmarking Differential Abundance Tests for 16S microbiome sequencing data using simulated data based on experimental templates.}, journal = {PloS one}, volume = {20}, number = {5}, pages = {e0321452}, pmid = {40388544}, issn = {1932-6203}, mesh = {*RNA, Ribosomal, 16S/genetics ; *Microbiota/genetics ; Benchmarking ; Computer Simulation ; Humans ; *Metagenomics/methods ; Computational Biology/methods ; }, abstract = {Differential abundance (DA) analysis of metagenomic microbiome data is essential for understanding microbial community dynamics across various environments and hosts. Identifying microorganisms that differ significantly in abundance between conditions (e.g., health vs. disease) is crucial for insights into environmental adaptations, disease development, and host health. However, the statistical interpretation of microbiome data is challenged by inherent sparsity and compositional nature, necessitating tailored DA methods. This benchmarking study aims to simulate synthetic 16S microbiome data using metaSPARSim (Patuzzi I, Baruzzo G, Losasso C, Ricci A, Di Camillo B. MetaSPARSim: a 16S rRNA gene sequencing count data simulator. BMC Bioinformatics. 2019;20:416. https://doi.org/10.1186/s12859-019-2882-6 PMID: 31757204) MIDASim (He M, Zhao N, Satten GA. MIDASim: a fast and simple simulator for realistic microbiome data. Available from: https://doi.org/10.1101/2023.03.23.533996), and sparseDOSSA2 (Ma S, Ren B, Mallick H, Moon YS, Schwager E, Maharjan S, et al. A statistical model for describing and simulating microbial community profiles. PLOS Comput Biol. 2021;17(9):e1008913. https://doi.org/10.1371/journal.pcbi.1008913 PMID: 34516542) , leveraging 38 real-world experimental templates (S3 Table) previously utilized in a benchmark study comparing DA tools. These datasets, drawn from diverse environments such as human gut, soil, and marine habitats, serve as the foundation for our simulation efforts. We employ the same 14 DA tests that were previously used with the same experimental data in benchmark studies alongside 8 DA tests that were developed subsequently. Initially, we will generate synthetic data closely mirroring the experimental datasets, incorporating a known truth to cover a broad range of real-world data characteristics. This approach allows us to assess the ability of DA methods to recover known true differential abundances. We will further simulate datasets by altering sparsity, effect size, and sample size, thus creating a comprehensive collection for applying the 22 DA tests. The outcomes, focusing on sensitivities and specificities, will provide insights into the performance of DA tests and their dependencies on sparsity, effect size, and sample size. Additionally, we will calculate data characteristics (S1 and S2 Table) for each simulated dataset and use a multiple regression to identify informative data characteristics influencing test performance. Our prior study, where we used simulated data without incorporating a known truth, demonstrated the feasibility of using synthetic data to validate experimental findings. This current study aims to enhance our understanding by systematically evaluating the impact of known truth incorporation on DA test performance, thereby providing further information for the selection and application of DA methods in microbiome research.}, }
@article {pmid40388308, year = {2025}, author = {Wang, S and Kong, F and Dai, D and Li, C and Hao, Y and Wang, E and Cao, Z and Wang, Y and Wang, W and Li, S}, title = {Deterministic succession patterns in the rumen and fecal microbiome associate with host metabolic shifts in peripartum dairy cattle.}, journal = {GigaScience}, volume = {14}, number = {}, pages = {}, pmid = {40388308}, issn = {2047-217X}, support = {2022YFD1301400//National Key Research and Development Program/ ; }, mesh = {Animals ; Cattle ; *Rumen/microbiology/metabolism ; *Feces/microbiology ; *Gastrointestinal Microbiome ; Female ; *Peripartum Period/metabolism ; RNA, Ribosomal, 16S/genetics ; Metagenomics/methods ; Pregnancy ; }, abstract = {BACKGROUND: Metabolic disorders in peripartum ruminants affect health and productivity, with gut microbiota playing a key role in host metabolism. Therefore, our study aimed to characterize the gut microbiota of peripartum dairy cows to better understand the relationship between metabolic phenotypes and the rumen and fecal microbiomes during the peripartum period.<br><br>RESULTS: In a longitudinal study of 91 peripartum cows, we analyzed rumen and fecal microbiomes via 16S rRNA and metagenomic sequencing across six time points. By using enterotype classification, ecological model, and random forest analysis, we identified distinct deterministic succession patterns in the rumen and fecal microbiomes (rumen: rapid transition-transition-stable; hindgut: stable-transition-stable). Key microbes, such as Succiniclasticum and Bifidobacterium, were found to drive microbial succession by balancing stochastic and deterministic processes. Notably, we observed that changes in gut microbiota succession patterns significantly influenced metabolic phenotypes (e.g., serum non-esterified fatty acid, glucose, and insulin levels). Mediation analysis suggested that specific gut microbes (e.g., Prevotella sp900315525 in the rumen and Alistipes sp015059845 in the hindgut) and metabolic pathways (e.g., glucose-related pathway) were associated with host metabolic phenotypes.<br><br>CONCLUSIONS: Overall, utilizing a large gut microbiome dataset and enterotype- and ecological model-based microbiome analyses, we comprehensively elucidated the succession and assembly of the gut microbiota in peripartum dairy cows. We further confirmed that changes in gut microbiota succession patterns were significantly related to the metabolic phenotypes of peripartum dairy cows. These findings provide valuable insights for developing health management strategies for peripartum ruminants.}, }
@article {pmid40387602, year = {2025}, author = {Bonacolta, AM and Krause-Massaguer, J and Unuma, T and Del Campo, J}, title = {The Sea Cucumber-Infecting Parasite Apostichocystis gudetama gen. nov. sp. nov. Expands Marine-Host-Specific Clade of Apicomplexans.}, journal = {The Journal of eukaryotic microbiology}, volume = {72}, number = {3}, pages = {e70013}, pmid = {40387602}, issn = {1550-7408}, support = {//University of Miami/ ; PID2020-118836GA-I00//Ministerio de Ciencia, Innovaci&#xf3;n y Universidades/ ; 2021 SGR 00420//Departament de Recerca i Universitats de la Generalitat de Catalunya/ ; }, mesh = {Animals ; Phylogeny ; *Sea Cucumbers/parasitology ; *Apicomplexa/genetics/classification/isolation &amp; purification ; Host Specificity ; Female ; Host-Parasite Interactions ; Genome, Mitochondrial ; }, abstract = {Unknown ellipsoid bodies, later classified as apicomplexan cysts, are prevalent in the ovaries of Japanese sea cucumbers (Apostichopus japonicus), where they can lead to lower fecundity in infected individuals and adverse effects on wild populations as well as aquaculture efforts for this endangered species. Apicomplexans are widespread and essential to marine environments, where they can affect the health and fitness of host populations. We performed genomic sequencing of recovered cysts to gain more ecological and evolutionary information on this parasite. We recovered this apicomplexan's complete nuclear ribosomal RNA (rrn) operon, the entire mitochondrial genome, and a partial apicoplast (relic chloroplast) genome. The rrn operon phylogeny revealed this parasite as being closely related to coccidian-like parasites of marine fish (ichthyocolids) and cnidarians (corallicolids), while organelle phylogenomics hint at a closer relation to the protococcidian Eleutheroschizon. Using this new phylogenetic context and previous morphological descriptions, we describe this parasite as Apostichocystis gudetama gen. nov. sp. nov. Mining available microbiomes reveal the presence of Apostichocystis spp. beyond its host range, alluding to other potential hosts or cryptic, closely related lineages. Its phylogenetic placement has important implications concerning the evolution of parasitism within Apicomplexa and the divergence of a marine-host-specific clade of coccidian-like parasites.}, }
@article {pmid40383397, year = {2025}, author = {Merrick, B and Prossomariti, D and Allen, E and Bisnauthsing, K and Kertanegara, M and Sergaki, C and Le Guennec, AD and Delord, M and Bell, JT and Conte, MR and Moyes, DL and Shankar-Hari, M and Douiri, A and Goodman, AL and Shawcross, DL and Goldenberg, SD}, title = {Faecal microbiota transplant to ERadicate gastrointestinal carriage of Antibiotic-Resistant Organisms (FERARO): A feasibility randomised controlled trial.}, journal = {The Journal of infection}, volume = {91}, number = {1}, pages = {106504}, doi = {10.1016/j.jinf.2025.106504}, pmid = {40383397}, issn = {1532-2742}, mesh = {Humans ; *Fecal Microbiota Transplantation/methods/adverse effects ; Male ; Female ; Middle Aged ; Feasibility Studies ; *Carrier State/therapy/microbiology ; Aged ; Adult ; *Gastrointestinal Tract/microbiology ; Feces/microbiology ; Gastrointestinal Microbiome ; Drug Resistance, Multiple, Bacterial ; Treatment Outcome ; Anti-Bacterial Agents ; *Enterobacteriaceae Infections/therapy/microbiology ; }, abstract = {OBJECTIVES: The gastrointestinal tract (GIT) is a reservoir of multidrug-resistant organisms (MDRO). Colonisation with MDRO precedes invasive infections, which can be challenging to treat with excess morbidity and mortality compared to antimicrobial-susceptible infections. Currently, there are no effective GIT decolonisation strategies. Whilst faecal microbiota transplant (FMT) has emerged as a potential therapeutic, there remains uncertainty about its feasibility, safety, and efficacy.<br><br>METHODS: Population: Patients with invasive infection with extended-spectrum beta-lactamase (ESBL-) or carbapenem-resistant Enterobacterales (CRE) and persistent GIT carriage.<br><br>INTERVENTION: Three doses of encapsulated lyophilised FMT.<br><br>COMPARATOR: Matched placebo capsules.<br><br>OUTCOMES: Primary outcome was participant consent rate as a proportion of those approached to be screened for GIT carriage of ESBL-E/CRE. Secondary outcomes were additional feasibility, safety and tolerability, and efficacy metrics. Exploratory outcomes included stool metagenomic analysis.<br><br>RESULTS: Of 460 approached individuals, 124 (27%) consented. 53/124 participants (43%) fulfilled all eligibility criteria. 44/53 (83%) of those eligible were randomised and 41/44 (93%) received investigational medicinal product (IMP): 20 FMT and 21 placebo. 39/41 (95%) completed IMP dosing. Abdominal bloating and skin and subcutaneous tissue disorders were more common following FMT, but there were no unanticipated harms. MDRO carriage decreased over time across arms but was lower at all time points in the FMT arm. FMT increased microbiome diversity and microbiome-based health measures. FMT recipients' samples clustered into two groups, with those with more dissimilar community composition to donors more likely to decolonise post-FMT (3/5 vs. 0/12, p&#xa0;=&#xa0;0.01). Patients that decolonised exhibited a trend towards increased proportional representation of donor-derived strains in their post-FMT samples (p&#xa0;=&#xa0;0.05) and change in strain dominance within MDRO at the species-level.<br><br>CONCLUSIONS: Progression to a substantive trial is feasible with modifications to the existing FERARO protocol. FMT was safe, well tolerated, and acceptable to patients colonised with MDRO. Microbiome analysis infers that greater donor-recipient microbiome dissimilarity at baseline and higher rates of donor-derived strain engraftment favour MDRO decolonisation, which in turn maybe facilitated by conspecific strain replacement.}, }
@article {pmid40382475, year = {2025}, author = {Yang, Q and Downey, R and Stark, JS and Johnstone, GJ and Mitchell, JG}, title = {The Microbial Ecology of Antarctic Sponges.}, journal = {Microbial ecology}, volume = {88}, number = {1}, pages = {44}, pmid = {40382475}, issn = {1432-184X}, mesh = {*Porifera/microbiology ; Animals ; Antarctic Regions ; *Microbiota ; Symbiosis ; *Bacteria/classification/genetics/isolation &amp; purification ; Archaea/classification/genetics/isolation &amp; purification ; Ecosystem ; Fungi/classification/genetics/isolation &amp; purification ; }, abstract = {Microbial communities in Antarctic marine sponges have distinct taxonomic and functional profiles due to low temperatures, seasonal days and nights, and geographic isolation. These sponge holobionts contribute to nutrient cycling, structural habitat formation, and benthic ecosystem resilience. We review Antarctic sponge holobiont knowledge, integrating culture-based and molecular data across environmental and taxonomic gradients. Although microbiome data exist for only a fraction of the region's 593 known sponge species, these hosts support diverse symbionts spanning at least 63 bacterial, 5 archaeal, and 6 fungal phyla, highlighting the complexity and ecological significance of these understudied polar microbiomes. A conserved core microbiome, dominated by Proteobacteria, Bacteroidetes, Nitrospinae, and Planctomycetes, occurs across Antarctic sponges, alongside taxa shaped by host identity, depth, and environment. Metagenomic data indicate microbial nitrogen cycling, chemoautotrophic carbon fixation, and stress tolerance. Despite these advances, major knowledge gaps remain, particularly in deep-sea and sub-Antarctic regions, along with challenges in taxonomy, methodological biases, and limited functional insights. We identify key research priorities, including developing standardised methodologies, expanded sampling across ecological and depth gradients, and integrating multi-omics with environmental and host metadata. Antarctic sponge holobionts provide a tractable model for investigating microbial symbiosis, functional adaptation, and ecosystem processes in one of Earth's most rapidly changing marine environments.}, }
@article {pmid40382365, year = {2025}, author = {Schilling, M and Jagdev, M and Thomas, H and Johnson, N}, title = {Metagenomic analysis of mosquitoes from Kangerlussuaq, Greenland reveals a unique virome.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {17141}, pmid = {40382365}, issn = {2045-2322}, mesh = {Animals ; Greenland ; *Virome/genetics ; *Metagenomics/methods ; *Aedes/virology/genetics ; *Mosquito Vectors/virology ; Metagenome ; Phylogeny ; *Culicidae/virology ; Climate Change ; }, abstract = {Climate change is dramatically affecting vector ecology in extreme environments such as the Arctic. However, little is known about the current status of viruses of arthropod vectors located in such northerly locations. As part of a field survey on the role of wildlife in international movement of zoonotic pathogens, we sampled mammalophilic mosquitoes near the settlement of Kangerlussuaq, Greenland in July 2022 and July 2023 to investigate their virome. The majority of mosquitoes were identified as either Aedes impiger or Aedes nigripes. Metagenomic analysis of RNA extracted from species pools detected a number of novel RNA viruses belonging to a range of different virus families, including Flaviviridae, Orthomyxoviridae, Bunyavirales, Totiviridae and Rhabdoviridae. However, the sequence identities when compared to previously published, were as low as 34% at the amino acid level. Furthermore, a comparison of virome diversity between Aedes species emphasises the uniqueness of both Aedes impiger and Aedes nigripes from this secluded ecosystem. It also highlights the need to better understand the viromes of potential pathogen vectors as the impacts of climate change are experienced in such northerly ecosystems.}, }
@article {pmid40382068, year = {2025}, author = {Zhang, Z and Ran, X and Guo, Z and Hou, Q and Qu, D and Wang, C and Xu, Y and Wang, Y}, title = {Microbial diversity, functional properties, and flavor characteristics of high-temperature Daqu with different colors.}, journal = {Food research international (Ottawa, Ont.)}, volume = {212}, number = {}, pages = {116406}, doi = {10.1016/j.foodres.2025.116406}, pmid = {40382068}, issn = {1873-7145}, mesh = {Color ; *Taste ; *Food Microbiology ; *Hot Temperature ; Odorants/analysis ; Humans ; *Bacteria/classification/genetics ; *Microbiota ; China ; }, abstract = {High-temperature Daqu (HTD) plays a crucial role in the quality of sauce-flavor baijiu. Daqu of different colors serves distinct functions in the baijiu brewing process. However, indicators for distinguishing among different-colored Daqu remain insufficient. This study investigated the microbial community structures, physicochemical properties, and E-sensory characteristics of different-colored HTD from Shandong Province. The results revealed significant differences in microbial communities among the three HTD types (P < 0.05). Kroppenstedtia eburnea, three Bacillus species, and Weizmannia coagulans were significantly enriched in white Daqu; an unclassified Staphylococcus species dominated in black Daqu; and Aspergillus oryzae, Aspergillus fumigatus, and Proteus mirabilis were highly abundant in yellow Daqu. Compared to HTD from Guizhou and Hubei, Shandong HTD was characterized by microbial species such as Proteus mirabilis and Bacillus velezensis. Using metagenomic analysis, we, for the first time, identified Thermomyces lanuginosus, Lentibacillus daqui, and an unclassified Thermoascus species as potential major contributors to pyrazine synthesis in HTD. The primary differences among the three colored Shandong Daqu types lay in their aroma profiles rather than taste. Electronic nose and electronic tongue analyses demonstrated that the W6S and W3S sensors effectively distinguished black and white Daqu, respectively, marking a novel application of these technologies in Daqu analysis. Acidity was identified as a key factor influencing microbial community structure, flavor characteristics, and enzyme activities, with a nonlinear relationship observed between acidity and enzyme activities. This study highlights the microbial and sensory distinctions among different-colored HTD and provides effective indicators for distinguishing these three types of Daqu.}, }
@article {pmid40381442, year = {2025}, author = {Zhang, X and Li, M and Xiao, Y and Yang, X and Zhou, H and Qu, Y and Zhan, J}, title = {Metagenomics reveals combined effects of microplastics and antibiotics on microbial community structure and function in coastal sediments.}, journal = {Marine pollution bulletin}, volume = {218}, number = {}, pages = {118153}, doi = {10.1016/j.marpolbul.2025.118153}, pmid = {40381442}, issn = {1879-3363}, mesh = {*Geologic Sediments/microbiology/chemistry ; *Anti-Bacterial Agents/toxicity ; *Microplastics/toxicity ; *Water Pollutants, Chemical/toxicity ; Metagenomics ; *Microbiota/drug effects ; Bacteria/drug effects ; }, abstract = {Microplastics and antibiotics are emerging pollutants in marine environments, yet their combined effects on coastal sediments remain poorly understood. This study examined the impacts of microplastics and antibiotics on sediment properties and microbial communities through a 60-day laboratory simulation. Results showed that microplastics significantly reduced carbon, nitrogen, and phosphorus levels in sediments, while both antibiotics and combined pollution decreased phosphorus content. Combined pollution also increased NH4[+]-N concentration. Enzyme activity analysis revealed that microplastics elevated alkaline phosphatase activity, antibiotics increased fluorescein diacetate (FDA) hydrolase activity but decreased urease activity, and their combination further enhanced FDA hydrolase activity. Metagenomics analysis demonstrated that the presence of microplastics and antibiotics altered microbial community structure and metabolic functions. The dominant phylum Pseudomonadota (42.62 %-56.24 %) showed reduced abundance under combined pollution. Antibiotics significantly increased resistance gene abundance, while combined pollution led to selective enrichment of these genes. Both pollutants inhibited ammonia assimilation, and antibiotics also suppressed dissimilatory nitrate reduction. Conversely, combined pollution promoted nitrification and nitrogen fixation. While microplastics and antibiotics inhibited methane synthesis, combined pollution increased methane production via elevated mttB and hdrA genes. Antibiotics also reduced methane-oxidizing bacteria and genes, suppressing methane oxidation. These findings provide crucial insights into the ecological impacts of microplastics and antibiotics on coastal sediments, offering a theoretical basis for future marine pollution management strategies.}, }
@article {pmid40380272, year = {2025}, author = {Zhang, S and Zheng, N and Zhao, S and Wang, J}, title = {Allicin enhances urea-N conversion to microbial-N by inhibiting urease activity and modulating the rumen microbiome in cattle.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {124}, pmid = {40380272}, issn = {2049-2618}, support = {2023M743835//Project Funded by China Postdoctoral Science Foundation/ ; CAAS-ZDRW202308//Agricultural Science and Technology Innovation Program/ ; 2022YFD1301000//National Key Research and Development Program of China/ ; 2004DA125184G2406//State Key Laboratory of Animal Nutrition and Feeding/ ; }, mesh = {Animals ; *Sulfinic Acids/pharmacology/chemistry ; *Urease/antagonists &amp; inhibitors/metabolism/chemistry ; *Rumen/microbiology ; *Urea/metabolism ; Disulfides/pharmacology ; *Nitrogen/metabolism ; Cattle ; Molecular Docking Simulation ; *Gastrointestinal Microbiome/drug effects ; *Bacteria/metabolism/drug effects/classification/genetics ; Enzyme Inhibitors/pharmacology ; }, abstract = {BACKGROUND: Urea serves as a vital nonprotein nitrogen source in ruminant nutrition, but its efficient utilization is often hampered due to rapid urease activity in the rumen. This study explores the potential of allicin, a garlic-derived compound, as a urease inhibitor to improve urea nitrogen utilization. Enzyme inhibition kinetics and molecular docking were used to identify allicin's interaction sites on urease. Additionally, metagenomic and [15]N-urea metabolic flux analyses were conducted to evaluate allicin's impact on microbial populations and urea-N metabolism.<br><br>RESULTS: Allicin was identified as an inhibitor of ruminal urease, with an IC50 of 126.77&#x2009;&#xb1;&#x2009;1.21&#xa0;&#x3bc;M. Molecular docking studies have shown that allicin forms hydrogen bonds with key urease residues, leading to the preemption of the urease active site and thus impeding urea binding. In a simulated rumen environment, allicin significantly reduced urea hydrolysis and ammonia production. Furthermore, allicin modified the rumen microbial community by inhibiting Prevotella species while promoting the growth of Ruminobacter species and Denitrobacterium detoxificans. A [15]N-urea metabolic flux analysis revealed that allicin facilitated the incorporation of urea-derived nitrogen into microbial amino acids and nucleotides.<br><br>CONCLUSION: Allicin effectively inhibits urease activity in the rumen, enhancing the conversion of urea-N into microbial biomass. These findings suggest that allicin has significant potential to optimize urea metabolism in the rumen, offering a novel strategy for improving ruminant nitrogen nutrition. Video Abstract.}, }
@article {pmid40378832, year = {2025}, author = {Sarhan, MS and Antonello, G and Weissensteiner, H and Mengoni, C and Mascalzoni, D and Waldron, L and Segata, N and Fuchsberger, C}, title = {Human mitochondrial DNA in public metagenomes: Opportunity or privacy threat?.}, journal = {Cell}, volume = {188}, number = {10}, pages = {2561-2566}, doi = {10.1016/j.cell.2025.03.023}, pmid = {40378832}, issn = {1097-4172}, mesh = {Humans ; *DNA, Mitochondrial/genetics ; *Metagenome ; *Metagenomics/ethics ; Privacy ; Microbiota ; *Genetic Privacy/ethics ; }, abstract = {Human DNA is unavoidably present in metagenomic analyses of human microbiomes. While current protocols remove human DNA before submission to public repositories, mitochondrial DNA (mtDNA) has been overlooked and frequently persists. We discuss the privacy risks and research opportunities associated with mtDNA, urging consideration by the scientific, ethics, and legal communities.}, }
@article {pmid40377844, year = {2025}, author = {Paul, B and Pan, P and Bhattacharyya, N}, title = {Investigating the impact of fly ash contamination on soil microbial diversity: a metagenomic study near Kolaghat Thermal Power Plant, India.}, journal = {Environmental science and pollution research international}, volume = {32}, number = {23}, pages = {14002-14019}, pmid = {40377844}, issn = {1614-7499}, mesh = {India ; *Soil Microbiology ; *Coal Ash ; Metagenomics ; Power Plants ; *Soil Pollutants ; Bacteria ; Fungi ; Soil/chemistry ; Microbiota ; }, abstract = {Soil metagenomics using whole genome shotgun sequencing (WGS) uncovers microbial diversity and functionality in soils. This study aimed to explore microbial diversity and functional adaptation in soils exposed to fly ash near the Kolaghat Thermal Power Plant, West Bengal, India, using whole genome shotgun sequencing. Understanding how microbial communities respond to such contamination is essential for developing effective bioremediation strategies. Soil samples were collected from the area, designated as BP1 sample selected for detailed metagenomics analysis. The study extracted DNA with a concentration of 46.2 ng/µl, followed by quality checks and profiling to identify microbial communities. Analysis showed that bacterial communities were dominated by Actinobacteria (48.28%) and Proteobacteria (40.80%), while fungi were primarily represented by Ascomycota (89.50%). Among viruses, Negarnaviricota were most prevalent, with the class Insthoviricetes accounting for 94.60%. Diversity analysis indicated that bacterial populations remained stable, fungal diversity fluctuated, and viral diversity increased, reflecting complex ecological interactions. The presence of key genes involved in lipid and carbohydrate metabolism suggests that microbes adapted to contamination by heavy metals and organic pollutants. The dominance of stress-tolerant Proteobacteria and Actinobacteria highlights their potential role in bioremediation. Future research should explore the potential of these microbes, particularly the role of ABC transporters, in improving pollutant degradation.}, }
@article {pmid40377187, year = {2025}, author = {Veseli, I and Chen, YT and Schechter, MS and Vanni, C and Fogarty, EC and Watson, AR and Jabri, B and Blekhman, R and Willis, AD and Yu, MK and Fernàndez-Guerra, A and Füssel, J and Eren, AM}, title = {Microbes with higher metabolic independence are enriched in human gut microbiomes under stress.}, journal = {eLife}, volume = {12}, number = {}, pages = {}, pmid = {40377187}, issn = {2050-084X}, support = {R35 GM133420/GM/NIGMS NIH HHS/United States ; RC2 DK122394/NH/NIH HHS/United States ; R35 GM128716/NH/NIH HHS/United States ; RC2 DK122394/DK/NIDDK NIH HHS/United States ; R35 GM128716/GM/NIGMS NIH HHS/United States ; 1746045//National Science Foundation Graduate Research Fellowship Program/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Inflammatory Bowel Diseases/microbiology ; *Stress, Physiological ; Metagenome ; *Bacteria/metabolism/genetics/classification ; }, abstract = {A wide variety of human diseases are associated with loss of microbial diversity in the human gut, inspiring a great interest in the diagnostic or therapeutic potential of the microbiota. However, the ecological forces that drive diversity reduction in disease states remain unclear, rendering it difficult to ascertain the role of the microbiota in disease emergence or severity. One hypothesis to explain this phenomenon is that microbial diversity is diminished as disease states select for microbial populations that are more fit to survive environmental stress caused by inflammation or other host factors. Here, we tested this hypothesis on a large scale, by developing a software framework to quantify the enrichment of microbial metabolisms in complex metagenomes as a function of microbial diversity. We applied this framework to over 400 gut metagenomes from individuals who are healthy or diagnosed with inflammatory bowel disease (IBD). We found that high metabolic independence (HMI) is a distinguishing characteristic of microbial communities associated with individuals diagnosed with IBD. A classifier we trained using the normalized copy numbers of 33 HMI-associated metabolic modules not only distinguished states of health vs IBD, but also tracked the recovery of the gut microbiome following antibiotic treatment, suggesting that HMI is a hallmark of microbial communities in stressed gut environments.}, }
@article {pmid40373900, year = {2025}, author = {Yin, CY and Sadiq, H and Liao, WH and Wang, HN and Fu, Z and Yu, WG and Han, F}, title = {Identification and functional characterization of two novel hyaluronate lyases BxHly33 and BiHly33, from the human gut microbiome.}, journal = {International journal of biological macromolecules}, volume = {313}, number = {}, pages = {144153}, doi = {10.1016/j.ijbiomac.2025.144153}, pmid = {40373900}, issn = {1879-0003}, mesh = {*Polysaccharide-Lyases/chemistry/metabolism/genetics ; Humans ; *Gastrointestinal Microbiome ; Hyaluronic Acid/metabolism ; Substrate Specificity ; Enzyme Stability ; Hydrogen-Ion Concentration ; Temperature ; Amino Acid Sequence ; }, abstract = {Hyaluronic acid (HA) is a key glycosaminoglycan in the extracellular matrix, essential for cellular signaling, hydration, and tissue homeostasis. This study identified two novel polysaccharide lyase family 33 (PL33) hyaluronate lyases, BxHly33 and BiHly33, from the human gut microbiome using metagenomic screening. These enzymes demonstrated high specificity and stability in degrading HA, with optimal activity at pH 6.6-7.6 and temperatures of 35-40 °C. Furthermore, structural and biochemical analyses revealed their catalytic mechanisms, highlighting key residues responsible for their function. Notably, specific alanine substitutions significantly enhanced their enzymatic activity. BxHly33 and BiHly33 present promising alternatives to conventional hyaluronidases, which are often costly and immunogenic, for drug delivery and tissue engineering applications. This study will provide novel insights into exploring their therapeutic potential in HA degradation therapies.}, }
@article {pmid40373419, year = {2025}, author = {Orsi, AS and Lemos Junior, WJF and Alegbeleye, OO and Muniz, DC and Horita, CN and Sant'Ana, AS}, title = {Sodium chloride reduction in meat processing: Microbial shifts, spoilage risks, and metagenomic insights.}, journal = {Meat science}, volume = {226}, number = {}, pages = {109848}, doi = {10.1016/j.meatsci.2025.109848}, pmid = {40373419}, issn = {1873-4138}, mesh = {*Meat Products/microbiology/analysis ; *Food Microbiology ; *Sodium Chloride/analysis ; *Food Handling/methods ; Animals ; Metagenomics ; Microbiota ; Bacteria ; Food Preservation/methods ; }, abstract = {This review evaluated the impact of sodium chloride (NaCl) reduction or substitution on the microbial ecology of meat products, with a focus on how these changes affect shelf life and safety. Reducing NaCl in fresh meat products promotes the growth of psychrotrophic spoilage bacteria, such as Pseudomonas sp., which thrive at low temperatures, and mesophilic pathogens like Escherichia coli and Staphylococcus aureus, particularly under inadequate storage conditions. In cured and fermented meats, such as salami, lowering NaCl levels disrupts the balance of salt-tolerant microorganisms, notably lactic acid bacteria (LAB) and coagulase-negative staphylococci, potentially leading to increased spoilage and pathogen proliferation. In smoked meats, the combination of reduced NaCl and altered microbial ecology, including a shift toward LAB dominance, may weaken the inhibitory effects on spore-forming bacteria like Clostridium botulinum. Additionally, using metagenomics, we explore the shifts in microbial communities observed in studies involving meat, revealing critical insights into the composition and diversity of bacteria in meat products, as well as the gaps in research on the impact of NaCl reduction and/or substitution on the microbiota. This review provides a comprehensive understanding of these microbial shifts, highlighting the distinct responses of psychrotrophic, mesophilic, and LAB groups to NaCl modification and the need to understand the effects of these alternatives on the meat product microbiome, as well as the neglected microorganisms that can affect the quality and safety of these products.}, }
@article {pmid40373385, year = {2025}, author = {Xu, Z and Pei, Y and Wang, H and Li, X}, title = {Comparative analysis of gut microbiota-mediated bile acid profiles in Bufo gargarizans and Rana chensinensis tadpoles.}, journal = {Comparative biochemistry and physiology. Part D, Genomics &amp; proteomics}, volume = {55}, number = {}, pages = {101530}, doi = {10.1016/j.cbd.2025.101530}, pmid = {40373385}, issn = {1878-0407}, mesh = {Animals ; *Bile Acids and Salts/metabolism ; *Gastrointestinal Microbiome ; Larva/microbiology/metabolism ; *Ranidae/microbiology/metabolism ; *Bufonidae/microbiology/metabolism ; }, abstract = {Bile acids (BAs) are cholesterol derivatives synthesized by the liver, exhibit variation between different species. Researchers have long appreciated that microbiota play the roles in the biotransformation of BAs. However, relatively few studies have been reported on microbial-mediated production and transformation of BAs in amphibians. Our focus here is principally on difference of intestinal microbial diversity and BAs profiles between two common amphibians, Bufo gargarizans (B. gargarizans) and Rana chensinensis (R. chensinensis) tadpoles, through intestinal targeted BAs metabolomics and fecal metagenomic sequencing. The results demonstrated that B. gargarizans possessed higher levels of total BAs and higher ratio of unconjugated / conjugated BAs. In addition, the relative abundance of microbiota with bile salt hydrolase (BSH) activity in B. gargarizans was significantly higher than that of R. chensinensis, which may facilitate the conversion of conjugated to unconjugated BAs. Meanwhile the higher prevalence of bile-acid-induced (BAI) gene encoding microbiota in R. chensinensis may promote the synthesis of deoxycholic acid (DCA). Furthermore, discrepancies in virulence factors (VFs) and energy metabolism were observed between the two species, which may be linked to differences in the microbiota. This study revealed substantial differences in intestinal microbes and BAs across amphibian species, emphasizing the significant impact of intestinal microbes on BAs metabolism.}, }
@article {pmid40372916, year = {2025}, author = {Ramar, M and Wiscovitch-Russo, R and Yano, N and Singh, H and Lamere, E and Short, M and Gonzalez-Juarbe, N and Fedulov, AV}, title = {Live bacteria in gut microbiome dictate asthma onset triggered by environmental particles via modulation of DNA methylation in dendritic cells.}, journal = {Cell reports}, volume = {44}, number = {5}, pages = {115684}, pmid = {40372916}, issn = {2211-1247}, support = {R01 ES030227/ES/NIEHS NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *DNA Methylation ; *Dendritic Cells/metabolism/immunology ; *Asthma/microbiology/immunology/genetics/pathology ; Mice ; Female ; Mice, Inbred C57BL ; *Bacteria ; Epigenesis, Genetic ; *Particulate Matter ; }, abstract = {Despite broad knowledge of the pathogenesis, our understanding of the origin of allergy and asthma remains poor, preventing etiotropic treatments. The gut microbiome is seen to be altered in asthmatics; however, proof of causality of the microbiome alterations is lacking. We report on gut microbiome transplantation (GMT) from mice predisposed to asthma by maternal exposure to pro-allergy environmental particles into naive recipients. This GMT confers asthma predisposition, and the effect is abrogated by gamma sterilization of the transplant material or by co-administration of antibacterials, indicating that viable bacteria are mediating the effect. Metagenomics identifies key changes in the "pro-asthma" microbiome, and metabolomics links the identified species to altered production of butyrate known to act on immune cells and epigenetic mechanisms. We further show that transplant recipients develop DNA methylation alterations in dendritic cells. Finally, dendritic cells with an altered methylome present allergen to T cells, and this effect is abrogated by an epigenetically acting drug in vitro.}, }
@article {pmid40372371, year = {2025}, author = {Li, X and He, N and Wang, H and Wu, Z and Wang, M and Liang, H and Xiao, L and Yang, Z and Li, C and Xu, P and Dai, T and Li, S and Zou, Y}, title = {Therapeutic effect of Faecalibacterium longum CM04-06 on DSS-induced ulcerative colitis in mice.}, journal = {Journal of applied microbiology}, volume = {136}, number = {5}, pages = {}, doi = {10.1093/jambio/lxaf119}, pmid = {40372371}, issn = {1365-2672}, support = {XMHT20220104017//Shenzhen Municipal Government of China/ ; }, mesh = {Animals ; *Colitis, Ulcerative/therapy/chemically induced/microbiology ; Mice ; *Gastrointestinal Microbiome ; Feces/microbiology ; *Probiotics/administration &amp; dosage/therapeutic use ; Cytokines/metabolism/blood ; Dextran Sulfate/adverse effects ; *Faecalibacterium/physiology/genetics ; Humans ; Disease Models, Animal ; Colon/microbiology ; Male ; Female ; Mice, Inbred C57BL ; }, abstract = {AIMS: This study explores the impact of Faecalibacterium longum CM04-06 on inflammatory bowel disease (IBD) by regulating gut microbiota in mice.<br><br>METHODS AND RESULTS: We reanalyzed the distribution of the CM04-06 genome in the metagenome of the IBD cohort and observed a significantly higher abundance of CM04-06 in healthy individuals compared to patients with UC or CD. The prophylactic administration of CM04-06 was evaluated for its effects on intestinal microbial diversity and community composition after a two-week trial in mice. The intestinal microbiota was characterized using metagenomic sequencing of fecal samples on the DNBSEQ platform. CM04-06 treatment resulted in a significant reduction in the Disease Activity Index (DAI) and histological scores, as well as a decrease in the levels of pro-inflammatory cytokines, including IL-1&#x3b2;, IL-6, and TNF-&#x3b1;, in both the colon and serum of DSS-induced mice. Furthermore, supplementation with CM04-06 significantly reduced the levels of pro-inflammatory cytokines in both the colon and serum. Additionally, CM04-06 enhanced the integrity of the intestinal epithelial barrier by increasing the expression of tight junction proteins and mucin. Moreover, we observed greater abundances of Faecalibaculum rodentium, Alistipes onderdonkii, Alistipes shahii, and Bifidobacterium animalis after CM04-06 treatment.<br><br>CONCLUSIONS: CM04-06 prevents and alleviates intestinal inflammation by modulating the composition of the microbiota community, increasing the abundance of beneficial probiotics, and suppressing pro-inflammatory cytokine levels.}, }
@article {pmid40371968, year = {2025}, author = {Jansen, D and Deleu, S and Caenepeel, C and Marcelis, T and Simsek, C and Falony, G and Machiels, K and Sabino, J and Raes, J and Vermeire, S and Matthijnssens, J}, title = {Virome drift in ulcerative colitis patients: faecal microbiota transplantation results in minimal phage engraftment dominated by microviruses.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2499575}, pmid = {40371968}, issn = {1949-0984}, mesh = {Humans ; *Fecal Microbiota Transplantation ; *Colitis, Ulcerative/therapy/virology/microbiology ; *Virome ; Male ; Female ; Feces/virology ; Adult ; Gastrointestinal Microbiome ; Middle Aged ; *Bacteriophages/genetics/isolation &amp; purification/classification ; Young Adult ; }, abstract = {Ulcerative colitis (UC) is an inflammatory bowel disease characterized by recurrent colonic inflammation. Standard treatments focus on controlling inflammation but remain ineffective for one-third of patients. This underscores the need for alternative approaches, such as fecal microbiota transplantation (FMT), which transfers healthy donor microbiota to patients. The role of viruses in this process, however, remains underexplored. To address this, we analyzed the gut virome using metagenomic sequencing of enriched viral particles from 320 longitudinal fecal samples of 44 patients enrolled in the RESTORE-UC FMT trial. Patients were treated with FMTs from healthy donors (allogenic, treatment) or themselves (autologous, control). We found that colonic inflammation, both its presence and location, had a greater impact on the gut virome than FMT itself. In autologous FMT patients, the virome was unstable and showed rapid divergence over time, a phenomenon we termed virome drift. In allogenic FMT patients, the virome temporarily shifted toward the healthy donor, lasting up to 5 weeks and primarily driven by microviruses. Notably, two distinct virome configurations were identified and linked to either healthy donors or patients. In conclusion, inflammation strongly affects the gut virome in UC patients, which may lead to instability and obstruct the engraftment of allogeneic FMT.}, }
@article {pmid40369676, year = {2025}, author = {Zhang, Y and Liu, H and Jing, H}, title = {Community differences and potential function along the particle size spectrum of microbes in the twilight zone.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {121}, pmid = {40369676}, issn = {2049-2618}, support = {424QN341//the Hainan Provincial Natural Science Foundation of China/ ; JRC2023C37//the Innovational Fund for Scientific and Technological Personnel of Hainan Province/ ; 2023YFC2812804//the National Key R&amp;D Program of China/ ; 183446KYSB20210002//the International Partnership Program of Chinese Academy of Sciences for Big Science/ ; }, mesh = {Particle Size ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Seawater/microbiology/chemistry ; *Microbiota/genetics ; Metagenomics/methods ; Carbon/metabolism ; Metagenome ; }, abstract = {BACKGROUND: The twilight zone, which extends from the base of the euphotic zone to a depth of 1000 m, is the major area of particulate organic carbon (POC) remineralization in the ocean. However, little is known about the microbial community and metabolic activity that are directly associated with POC remineralization in this consistently underexplored realm. Here, we utilized a large-volume in situ water transfer system to collect the microbes on different-sized particles from the twilight zone in three regions and analyzed their composition and metabolic function by metagenomic analysis.<br><br>RESULTS: Distinct prokaryotic communities with significantly lower diversity and less endemic species were detected on particles in the South East Asian Time-series Study (SEATS) compared with the other two regions, perhaps due to the in situ physicochemical conditions and low labile nutrient availability in this region. Observable transitions in community composition and function at the upper and lower boundaries of the twilight zone suggest that microbes respond differently to (and potentially drive the transformation of) POC through this zone. Substantial variations among different particle sizes were observed, with smaller particles typically exhibiting lower diversity but harboring a greater abundance of carbon degradation-associated genes than the larger particles. Such a pattern might arise due to the relatively larger surface area of the smaller particles relative to their volume, which likely provides more sites for microbial colonization, increasing their chance of being remineralized. This makes them less likely to be transferred to the deep ocean, and thus, they contribute more to carbon recycling than to long-term sequestration. Both contig-based and metagenome-assembled genome-(MAG-) based analyses revealed a high diversity of the Carbohydrate-Active enZymes (CAZy) family. This indicates the versatile carbohydrate metabolisms of the microbial communities associated with sinking particles that modulate the remineralization and export of POC in the twilight zone.<br><br>CONCLUSION: Our study reveals significant shifts in microbial community composition and function in the twilight zone, with clear differences among the three particle sizes. Microbes with diverse metabolic potential exhibited different responses to the POC entering the twilight zone and also collectively drove the transformation of POC through this zone. These findings provided insights into the diversity of prokaryotes in sinking particles and their roles in POC remineralization and export in marine ecosystems. Video Abstract.}, }
@article {pmid40368959, year = {2025}, author = {Song, XL and Wang, ZJ and Yin, XW and Sun, YL and Jang, DJ and Hong, SK}, title = {The impact of nitrogen deposition on nitrogen metabolism in ryegrass lawn with different soil nutrient levels.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {16755}, pmid = {40368959}, issn = {2045-2322}, mesh = {*Nitrogen/metabolism ; *Lolium/metabolism ; *Soil/chemistry ; Soil Microbiology ; Nitrogen Fixation ; Nitrification ; *Nutrients/metabolism ; Denitrification ; Nitrogen Cycle ; Microbiota ; Nitrates/metabolism ; }, abstract = {Nitrogen deposition is a crucial factor in global change, which is widespread across various regions globally. It has drawn extensive attention due to its direct modification of soil nitrogen retention and nitrogen species distribution, thereby influencing nitrogen metabolism across entire ecosystems. Previous studies on its influence on nitrogen metabolism have not reached a consensus. In an urban ryegrass lawn mesocosm experiment, we set two levels of nitrogen deposition and soil nutrients respectively, aiming to study the impacts of these factors on the N-cycling process through metagenomic analysis. The results demonstrated nitrogen deposition increased nitrification, nitrogen fixation, denitrification, and dissimilatory nitrate reduction, but decreased assimilatory nitrate reduction in the nitrogen metabolism process by changing soil nitrogen availability and the abundance of N-cycling functional genes in the soil microbial community. The soil nutrient levels exhibited effects opposite to those of nitrogen deposition, negatively impacting nitrification, denitrification, and nitrogen fixation in the nitrogen metabolism process. This work further elucidates the impacts of nitrogen deposition on the ecological functions of the ryegrass lawn with different soil nutrient levels, and predicts the potential impacts of intensified nitrogen deposition on these ecological functions. It provides valuable theoretical support for understanding and evaluating complex ecological interactions.}, }
@article {pmid40368948, year = {2025}, author = {Serivichyaswat, PT and Scholte, T and Wilms, T and Stranddorf, L and van der Valk, T}, title = {Metagenomic biodiversity assessment within an offshore wind farm.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {16786}, pmid = {40368948}, issn = {2045-2322}, mesh = {*Biodiversity ; *Metagenomics/methods ; North Sea ; Animals ; *Wind ; Seawater ; *DNA, Environmental/genetics/analysis ; Ecosystem ; *Metagenome ; Denmark ; }, abstract = {Environmental DNA (eDNA) analysis can be a powerful tool for monitoring biodiversity and assessing human impacts on ecosystems. In this study, we employed a genome-wide metagenomic eDNA approach to assess the marine biodiversity within and around the Horns Rev 1 offshore wind farm in the Danish North Sea. Seawater samples were collected from both within the windfarm and surrounding control sites, sequenced, and analyzed using a combination of DNA k-mer matching and alignment-based classification methods. We identified a wide range of species across the tree of life-highlighting the species richness of this marine ecosystem. Our results revealed a high degree of species diversity congruence between the wind farm and control sites. While this could suggest minimal ecological disruption of the wind farm, we cannot rule out that the influence of ocean currents and water mixing the DNA from different regions dominate the species detection. We detected bioindicator species, such as Thalassiosira, Phaeocystis and Skeletonema, which can provide insights into water quality. Our metagenomic approach also enabled us to obtain population genomics insights for species, such as the European anchovy (Engraulis encrasicolus) and the diatom Rhizosolenia setigera, and genetically confirmed the origin of the invasive Sea walnut (Mnemiopsis leidyi) in the North Sea. This study highlights the potential of genome-wide eDNA metagenomics as a framework for assessing marine biodiversity and detecting population-level genetic signals, contributing to informed and scalable ecosystem monitoring strategies.}, }
@article {pmid40367945, year = {2025}, author = {Antonaru, LA and Rad-Menéndez, C and Mbedi, S and Sparmann, S and Pope, M and Oliver, T and Wu, S and Green, DH and Gugger, M and Nürnberg, DJ}, title = {Evolution of far-red light photoacclimation in cyanobacteria.}, journal = {Current biology : CB}, volume = {35}, number = {11}, pages = {2539-2553.e4}, doi = {10.1016/j.cub.2025.04.038}, pmid = {40367945}, issn = {1879-0445}, mesh = {*Cyanobacteria/genetics/physiology/radiation effects ; *Light ; *Photosynthesis/genetics ; Phylogeny ; *Biological Evolution ; Multigene Family ; *Acclimatization ; Red Light ; }, abstract = {Cyanobacteria oxygenated the atmosphere of early Earth and continue to be key players in global carbon and nitrogen cycles. A phylogenetically diverse subset of extant cyanobacteria can perform photosynthesis with far-red light through a process called far-red light photoacclimation, or FaRLiP. This phenotype is enabled by a cluster of ∼20 genes and involves the synthesis of red-shifted chlorophylls d and f, together with paralogs of the ubiquitous photosynthetic machinery used in visible light. The FaRLiP gene cluster is present in diverse, environmentally important cyanobacterial groups, but its origin, evolutionary history, and connection to early biotic environments have remained unclear. This study takes advantage of the recent increase in (meta)genomic data to help clarify this issue: sequence data mining, metagenomic assembly, and phylogenetic tree networks were used to recover more than 600 new FaRLiP gene sequences, corresponding to 51 new gene clusters. These data enable high-resolution phylogenetics and-by relying on multiple gene trees, together with gene arrangement conservation-support FaRLiP appearing early in cyanobacterial evolution. Sampling information shows that considerable FaRLiP diversity can be observed in microbialites to the present day, and we hypothesize that the process was associated with the formation of microbial mats and stromatolites in the early Paleoproterozoic. The ancestral FaRLiP cluster was reconstructed, revealing features that have been maintained for billions of years. Overall, far-red-light-driven oxygenic photosynthesis may have played a significant role in Earth's early history.}, }
@article {pmid40367885, year = {2025}, author = {Mo, S and Wu, X and Kashif, M and Zeng, S and Sang, Y and Meng, C and He, S and Jiang, C}, title = {Effects of Spartina alterniflora invasion on carbon fixation and sulfate reduction in a subtropical marine mangrove ecosystem.}, journal = {Marine pollution bulletin}, volume = {217}, number = {}, pages = {118128}, doi = {10.1016/j.marpolbul.2025.118128}, pmid = {40367885}, issn = {1879-3363}, mesh = {*Wetlands ; *Carbon Cycle ; *Sulfates/metabolism ; *Introduced Species ; *Poaceae/physiology ; Geologic Sediments/microbiology ; Ecosystem ; *Rhizophoraceae ; }, abstract = {Mangrove sediments host diverse microbial communities that are crucial for carbon fixation, but their functions and pathways in subtropical ecosystems-particularly under Spartina alterniflora invasion and across varying sediment depths-remain unclear. This study employed metagenomic and qPCR analyses to explore microbial carbon fixation in Rhizophora stylosa, S. alterniflora, and bare beach habitats. Environmental factors like Cd, sulfide, pH, and salinity significantly influenced carbon fixation and sulfate reduction. Specifically, the invasion increased the abundance of key carbon fixation genes, including aclA/B, cbbL, and korA, which are involved in the Calvin-Benson-Bassham (CBB) and Arnon-Buchanan (rTCA) cycles, respectively. This shift in gene abundance was accompanied by elevated Ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) activity (0.47-21.82 nmol CO2 g[-1] soil min[-1]), suggesting a potential increase in microbial CO2 fixation rates in S. alterniflora-invaded sediments. Sediment depth also affected the distribution of carbon fixation genes and carbon-metabolizing microbes. Desulfobacterota were identified as major contributors to carbon fixation via both the rTCA and CBB cycles. Moreover, a strong correlation was observed between carbon fixation and sulfate reduction. These findings reveal how S. alterniflora invasion impacts carbon fixation and enhance our understanding of the mangrove ecosystems' role in climate change regulation.}, }
@article {pmid40367854, year = {2025}, author = {Ahmad, W and Coffman, L and Ray, R and Woldesenbet, S and Singh, G and Khan, AL}, title = {Flooding episodes and seed treatment influence the microbiome diversity and function in the soybean root and rhizosphere.}, journal = {The Science of the total environment}, volume = {982}, number = {}, pages = {179554}, doi = {10.1016/j.scitotenv.2025.179554}, pmid = {40367854}, issn = {1879-1026}, mesh = {*Glycine max/microbiology/physiology/growth &amp; development ; *Rhizosphere ; *Floods ; *Microbiota ; Plant Roots/microbiology ; Seeds ; *Soil Microbiology ; }, abstract = {Climate change-related events such as flooding have threatened crop productivity, agricultural sustainability, and global food security by causing hypoxic conditions. Such conditions impaire root development and nutrient acquisition, and alter root rhizospheric microbial communities that are vital for plant health and productivity. Seed treatment with pathogen protection have been key to maintaining early seed germination and plant productivity in field conditions. Still, their role in flooding stress and microbiome diversity and functionality in soybeans is poorly understood. Here, we performed field-based investigations to understand the impact of flooding episodes (0, 3, and 7 days after floodings; DAF) and seed treatment (Cruiser MAXX) on soybean plant growth and rhizosphere microbiome diversity and functionality. Flooding episodes significantly reduced seed yield (746 kg ha[-1]) compared to untreated control. However, the seed treatment increased plant height and pods per plant (3-DAF) and reduced flood injury by 33 % (7-DAF). The shotgun metagenomic analysis showed that seed treatment significantly enhanced the microbial community in rhizospheric soil. Flooding episodes impacted the microbial communities with higher abundance at 3-DAF than at 7-DAF. Flooding stress reduced the microbial diversity, although Proteobacteria increased as root endophytes. Seed treatment and flooding combinations decreased microbiome functionality and reduced gene counts for phytohormone biosynthesis, fermentation, nitrogen, symbiosis, and degradation pathways. Similarly, flooding stress shifted the carbohydrate synthesis to a more specialized substrate. These findings enhance understanding of soybean root and rhizosphere microbiome diversity and functionality dynamics during flooding stress and provide a platform to develop sustainable agricultural practices for enhancing soybean stress tolerance to flooding.}, }
@article {pmid40366862, year = {2025}, author = {Wang, L and Chen, X and Pollock, NR and Villafuerte Gálvez, JA and Alonso, CD and Wang, D and Daugherty, K and Xu, H and Yao, J and Chen, Y and Kelly, CP and Cao, Y}, title = {Metagenomic analysis reveals distinct patterns of gut microbiota features with diversified functions in C. difficile infection (CDI), asymptomatic carriage and non-CDI diarrhea.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2505269}, pmid = {40366862}, issn = {1949-0984}, support = {R01 AI116596/AI/NIAID NIH HHS/United States ; T32 DK007760/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Diarrhea/microbiology ; *Clostridium Infections/microbiology ; Feces/microbiology ; Female ; Male ; *Clostridioides difficile/genetics/physiology ; Metagenomics ; Middle Aged ; Aged ; *Bacteria/classification/genetics/isolation &amp; purification ; Adult ; *Carrier State/microbiology ; Aged, 80 and over ; }, abstract = {Clostridioides difficile infection (CDI) has been recognized as a leading cause of healthcare-associated infections and a considerable threat to public health globally. Increasing evidence suggests that the gut microbiota plays a key role in the pathogenesis of CDI. The taxonomic composition and functional capacity of the gut microbiota associated with CDI have not been studied systematically. Here, we performed a comprehensive shotgun metagenomic sequencing in a well-characterized human cohort to reveal distinct patterns of gut microbiota and potential functional features associated with CDI. Fecal samples were collected from 104 inpatients, including : (1) patients with clinically significant diarrhea and positive nucleic acid amplification testing (NAAT) and received CDI treatment (CDI, n = 47); (2) patients with positive stool NAAT but without diarrhea (Carrier, n = 17); (3) patients with negative stool NAAT but with diarrhea (Diarrhea, n = 14); and (4) patients with negative stool NAAT and without diarrhea (Control, n = 26). Downstream statistical analyses (including alpha and beta diversity analysis, differential abundance analysis, correlation network analysis, and potential functional analysis) were then performed. The gut microbiota in the Control group showed higher Chao1 index (p < 0.05), while Shannon index at KEGG module level was higher in CDI than in Carrier and Control (p < 0.05). Beta diversity for species composition differed significantly between CDI vs Carrier/Control cohorts (p < 0.05). Microbial Linear discriminant analysis Effect Size and ANCOM analysis both identified 8 species (unclassified_f_Enterobacteriaceae, Veillonella_parvula, unclassified_g_Klebsiella and etc.) were enriched in CDI, Enterobacter_aerogenes was enriched in Diarrhea, Collinsella_aerofaciens, Collinsella_sp_4_8_47FAA, Collinsella_tanakaei and Collinsella_sp_CAG_166 were enriched in Control (LDA >3.0, adjusted p < 0.05). Correlation network complexity was higher in CDI with more negative correlations than in other three cohorts. Modules involved in iron complex transport system (M00240) was enriched in CDI, ABC-2 type transport system (M00254), aminoacyl-tRNA biosynthesis (M00359), histidine biosynthesis (M00026) and inosine monophosphate biosynthesis (M00048) were enriched in Carrier, ribosome (M00178 and M00179) was enriched in Diarrhea, fluoroquinolone resistance (M00729) and aminoacyl-tRNA biosynthesis (M00360) were enriched in Control (LDA > 2.5, adjusted p < 0.05). Resistance functions of acriflavine and glycylcycline were enriched in CDI, while resistance function of bacitracin was enriched in Carrier (LDA > 3.0, adjusted p < 0.05), and the contributions of phylum and species to resistance functions differed among the four groups. Our results reveal alterations of gut microbiota composition and potential functions among four groups of differential colonization/infection status of Clostridioides difficile. These findings support the potential roles of gut microbiota and their potential functions in the pathogenesis of CDI.}, }
@article {pmid40366158, year = {2025}, author = {Geonczy, SE and Hillary, LS and Santos-Medellín, C and Sorensen, JW and Emerson, JB}, title = {Patchy burn severity explains heterogeneous soil viral and prokaryotic responses to fire in a mixed conifer forest.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0174924}, pmid = {40366158}, issn = {2379-5077}, mesh = {*Soil Microbiology ; Forests ; *Fires ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Soil/chemistry ; *Tracheophyta ; *Viruses/genetics/classification/isolation &amp; purification ; Microbiota ; Metagenome ; Virome ; }, abstract = {UNLABELLED: Effects of fire on soil viruses and virus-host dynamics are largely unexplored, despite known microbial contributions to biogeochemical processes and ecosystem recovery. Here, we assessed how viral and prokaryotic communities responded to a prescribed burn in a mixed conifer forest. We sequenced 91 viral-size fraction metagenomes (viromes) and 115 16S rRNA gene amplicon libraries from 120 samples: four samples at five timepoints (two before fire and three after fire) at six sites (four treatment, two control). We hypothesized that compositional differences would be most significant between burned and unburned soils, but instead, plot location best distinguished viral communities, more than treatment (burned or not), depth (0-3 or 3-6 cm), or timepoint. For both viruses and prokaryotes, some burned communities resembled unburned controls, while others were significantly different, revealing heterogeneous responses to fire. These patterns were explained by burn severity, here defined by soil chemistry. Viral but not prokaryotic richness decreased significantly with burn severity, and low viromic DNA yields indicated substantial loss of viral biomass at higher severity. The relative abundances of Firmicutes, Actinobacteriota, and the viruses predicted to infect them increased significantly with burn severity, suggesting survival and viral infection of these fire-responsive and potentially spore-forming taxa. The degree of burn severity experienced by each patch of soil, rather than burn status alone, differed over mere meters in the same fire. Therefore, our analyses highlight the importance of high-resolution, paired biogeochemical data to explain soil community responses to fire.<br><br>IMPORTANCE: The impact of fire on the soil microbiome, particularly on understudied soil viral communities, warrants investigation, given known microbial contributions to biogeochemical processes and ecosystem recovery. Here, we collected 120 soil samples before and after a prescribed burn in a mixed conifer forest to assess the impacts of this disturbance on soil viral and prokaryotic communities. We show that simple categorical comparisons of burned and unburned areas were insufficient to reveal the underlying community response patterns. The patchy nature of the fire (indicated by soil chemistry data) led to significant changes in viral and prokaryotic community composition in areas of high burn severity, while communities that experienced lower burn severity were indistinguishable from those in unburned controls. Our results highlight the importance of considering highly resolved burn severity and biogeochemical measurements, even in nearby soils after the same fire, in order to understand soil microbial responses to prescribed burns.}, }
@article {pmid40366141, year = {2025}, author = {Li, J and Zheng, K and Ding, W and Lu, L and Liang, Y and Xiong, Y and Wei, Z and Gao, C and Su, Y and Wang, Z and Chen, X and Bao, Z and Hu, X and McMinn, A and Wang, M}, title = {Healthy and moribund Zhikong scallops (Chlamys farreri) developed different viral communities during a mass mortality event.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0034225}, pmid = {40366141}, issn = {2379-5077}, support = {42120104006//National Natural Science Foundation of China/ ; 42176111//National Natural Science Foundation of China/ ; 42306156//National Natural Science Foundation of China/ ; LSKJ202203201//Ocean University of China/ ; ZR2024QD056//Department of Science and Technology of Shandong Province/ ; 202172002//Fundamental Research Funds for the Central Universities/ ; 202072001//Fundamental Research Funds for the Central Universities/ ; 201812002//Fundamental Research Funds for the Central Universities/ ; }, mesh = {Animals ; *Pectinidae/virology ; *Virome/genetics ; Phylogeny ; Metagenome ; *Viruses/genetics/classification ; Metagenomics ; }, abstract = {UNLABELLED: Viral assemblages of scallops are still relatively unknown. Here, metagenomic analysis was used to study virus communities in the gut of scallops to establish the first scallop virome data set (SVD); this contains 7,447 viral operational taxonomic units. Protein-sharing networks and phylogenetic analyses demonstrated the high diversity and novelty of the SVD, which is very different from viromes from other habitats. Potentially pathogenic viruses are prevalent in the gut of scallops. In particular, the novel smacoviruses were identified, indicating that scallops may be a potential hotspot for this viral group. Inference of virus-host associations found extensive interactions between viruses and major prokaryotic lineages. Intriguingly, moribund scallops showed a higher diversity of auxiliary metabolic genes (AMGs) related to amino acid metabolism and cofactor and vitamin genes, while healthy scallops had fewer AMGs, with those present focusing on secondary metabolite biosynthesis and carbohydrate metabolism. These findings provide the first landscape of scallop gut viruses based on metagenomes and highlight the potential roles of diverse and unique gut viruses for the health of filter-feeding bivalves.<br><br>IMPORTANCE: This study uses metagenome sequencing to establish the first scallop virome database. The study reveals previously unknown diversity of scallop-associated viruses and provides insights into links between disease status and viral diversity and genome content. The study will interest many aquatic virologists and could have important implications in managing marine resources.}, }
@article {pmid40366134, year = {2025}, author = {Gilbert, NE and Kimbrel, JA and Samo, TJ and Siccardi, AJ and Stuart, RK and Mayali, X}, title = {A bloom of a single bacterium shapes the microbiome during outdoor diatom cultivation collapse.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0037525}, pmid = {40366134}, issn = {2379-5077}, support = {SCW1039//U.S. Department of Energy/ ; 1939//Joint Genome Institute/ ; 50220//Facilities Integrating collaborations for User Science/ ; }, mesh = {*Diatoms/growth &amp; development/microbiology ; *Microbiota ; *Eutrophication ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification ; *Flavobacteriaceae/genetics/metabolism ; Metagenomics ; }, abstract = {Algae-dominated ecosystems are fundamentally influenced by their microbiome. We lack information on the identity and function of bacteria that specialize in consuming algal-derived dissolved organic matter in high algal density ecosystems such as outdoor algal ponds used for biofuel production. Here, we describe the metagenomic and metaproteomic signatures of a single bacterial strain that bloomed during a population-wide crash of the diatom, Phaeodactylum tricornutum, grown in outdoor ponds. 16S rRNA gene data indicated that a single Kordia sp. strain (family Flavobacteriaceae) contributed up to 93% of the bacterial community during P. tricornutum demise. Kordia sp. expressed proteins linked to microbial antagonism and biopolymer breakdown, which likely contributed to its dominance over other microbial taxa during diatom demise. Analysis of accompanying downstream microbiota (primarily of the Rhodobacteraceae family) provided evidence that cross-feeding may be a pathway supporting microbial diversity during diatom demise. In situ and laboratory data with a different strain suggested that Kordia was a primary degrader of biopolymers during algal demise, and co-occurring Rhodobacteraceae exploited degradation molecules for carbon. An analysis of 30 Rhodobacteraceae metagenome assembled genomes suggested that algal pond Rhodobacteraceae commonly harbored pathways to use diverse carbon and energy sources, including carbon monoxide, which may have contributed to the prevalence of this taxonomic group within the ponds. These observations further constrain the roles of functionally distinct heterotrophic bacteria in algal microbiomes, demonstrating how a single dominant bacterium, specialized in processing senescing or dead algal biomass, shapes the microbial community of outdoor algal biofuel ponds.IMPORTANCEAquatic biogeochemical cycles are dictated by the activity of diverse microbes inhabiting the algal microbiome. Outdoor biofuel ponds provide a setting analogous to aquatic algal blooms, where monocultures of fast-growing algae reach high cellular densities. Information on the microbial ecology of this setting is lacking, and so we employed metagenomics and metaproteomics to understand the metabolic roles of bacteria present within four replicated outdoor ponds inoculated with the diatom Phaeodactylum tricornutum. Unexpectedly, after 29 days of cultivation, all four ponds crashed concurrently with a "bloom" of a single taxon assigned to the Kordia bacterial genus. We assessed how this dominant taxon influenced the chemical and microbial fate of the ponds following the crash, with the hypothesis that it was primarily responsible for processing senescent/dead algal biomass and providing the surrounding microbiota with carbon. Overall, these findings provide insight into the roles of microbes specialized in processing algal organic matter and enhance our understanding of biofuel pond microbial ecology.}, }
@article {pmid40365061, year = {2025}, author = {Liu, L and Wang, Z and Luo, C and Deng, Y and Wu, W and Jin, Y and Wang, Y and Huang, H and Wei, Z and Zhu, Y and He, X and Guo, L}, title = {Beneficial soil microbiome profiles assembled using tetramycin to alleviate root rot disease in Panax notoginseng.}, journal = {Frontiers in microbiology}, volume = {16}, number = {}, pages = {1571684}, pmid = {40365061}, issn = {1664-302X}, abstract = {BACKGROUND: Root rot disease is a major threat to the sustainable production of Panax notoginseng. Tetramycin has a broad-spectrum fungicidal efficacy, low toxicity, and high efficiency, However, the prevention and control of root rot disease of P. notoginseng and the specific mechanism of action are still unclear.<br><br>METHODS: In this paper, a combination of indoor and pot experiments was used to assess the effectiveness of tetramycin at alleviating root rot disease challenges encountered by P. notoginseng. Amplicon sequencing, metagenomic analysis with microbial verification were used to investigate the microecological mechanisms underlying tetramycin's ability to reduce soil biological barriers.<br><br>RESULTS: We found that tetramycin significantly inhibited mycelial growth and spore germination of pathogenic fungi. Tetramycin, T2 (1000&#xd7;) and T3 (500&#xd7;), applied to continuous cropping soil, increased the seedling survival rates of P. notoginseng. Additionally, tetramycin reduced fungal &#x3b1;-diversity and shifted the fungal community assembly from deterministic to stochastic process. The microbial functions influenced by tetramycin were primarily associated with antibiotic synthesis and siderophore synthesis. Antibiotic efflux and inactivation have also been identified as the main resistance mechanisms. Microbial verification results showed that the artificially assembled tetramycin-regulated microbial community could indeed alleviate the occurrence of diseases. Furthermore, the cross-kingdom synthetic community assembled by the three key strains (Pseudomonas aeruginosa, Variovorax boronicumulans, and Cladosporium cycadicola) significantly improved the control of root rot disease and promoted plant growth.<br><br>DISCUSSION: This study provides novel insights into developing efficient biological control strategies and elucidates the role and mechanism of tetramycin in modulating soil microflora assembly to strengthen host disease resistance.}, }
@article {pmid40363788, year = {2025}, author = {Zhou, L and Li, J and Ding, C and Zhou, Y and Xiao, Z}, title = {Mechanistic Advances in Hypoglycemic Effects of Natural Polysaccharides: Multi-Target Regulation of Glycometabolism and Gut Microbiota Crosstalk.}, journal = {Molecules (Basel, Switzerland)}, volume = {30}, number = {9}, pages = {}, pmid = {40363788}, issn = {1420-3049}, support = {2024JJ8163//Hunan Natural Science Foundation/ ; C2023005//Key Project of Hunan Provincial Administration of Traditional Chinese Medicine/ ; 201923//Key Project of Hunan Provincial Administration of Traditional Chinese Medicine/ ; 2022ZYYGN06//2022 Annual Natural Drug Resources and Function Development Fund Project/ ; }, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Polysaccharides/pharmacology/chemistry/therapeutic use ; Animals ; *Hypoglycemic Agents/pharmacology/chemistry/therapeutic use ; Signal Transduction/drug effects ; Insulin Resistance ; Glucose/metabolism ; }, abstract = {Natural polysaccharides (NPs), as a class of bioactive macromolecules with multitarget synergistic regulatory potential, exhibit significant advantages in diabetes intervention. This review systematically summarizes the core hypoglycemic mechanisms of NPs, covering structure-activity relationships, integration of the gut microbiota-metabolism-immunity axis, and regulation of key signaling pathways. Studies demonstrate that the molecular weight, branch complexity, and chemical modifications of NPs mediate their hypoglycemic activity by influencing bioavailability and target specificity. NPs improve glucose metabolism through multiple pathways: activating insulin signaling, improving insulin resistance (IR), enhancing glycogen synthesis, inhibiting gluconeogenesis, and regulating gut microbiota homeostasis. Additionally, NPs protect pancreatic β-cell function via the nuclear factor E2-related factor 2 (Nrf2)/Antioxidant Response Element (ARE) antioxidant pathway and Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) anti-inflammatory pathway. Clinical application of NPs still requires overcoming challenges such as resolving complex structure-activity relationships and dynamically integrating cross-organ signaling. Future research should focus on integrating multi-omics technologies (e.g., metagenomics, metabolomics) and organoid models to decipher the cross-organ synergistic action networks of NPs, and promote their translation from basic research to clinical applications.}, }
@article {pmid40362493, year = {2025}, author = {Žukienė, G and Narutytė, R and Rudaitis, V}, title = {Association Between Vaginal Microbiota and Cervical Dysplasia Due to Persistent Human Papillomavirus Infection: A Systematic Review of Evidence from Shotgun Metagenomic Sequencing Studies.}, journal = {International journal of molecular sciences}, volume = {26}, number = {9}, pages = {}, pmid = {40362493}, issn = {1422-0067}, mesh = {Humans ; Female ; *Papillomavirus Infections/complications/microbiology/virology ; *Vagina/microbiology/virology ; *Microbiota/genetics ; Metagenomics/methods ; *Uterine Cervical Dysplasia/microbiology/virology/etiology ; Papillomaviridae ; Dysbiosis/microbiology ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The role of vaginal dysbiosis in the progression of human papilloma virus (HPV) associated cervical lesions has gained attention in recent years. While many studies use 16S rRNA gene sequencing for microbiota analysis, shotgun metagenomic sequencing offers higher taxonomic resolution and insights into microbial gene functions and pathways. This systematic review evaluates the relationship between compositional and functional changes in the vaginal microbiome during HPV infection and cervical lesion progression. A literature search was performed according to PRISMA guidelines in PubMed, Web of Science, Scopus, and ScienceDirect databases. Seven studies utilizing metagenomic sequencing in patients with HPV infection or HPV-associated cervical lesions were included. Progression from HPV infection to cervical lesions and cancer was associated with a reduction in Lactobacillus species (particularly Lactobacillus crispatus) and an enrichment of anaerobic and pathogenic species, especially Gardnerella vaginalis. Heterogeneous enriched metabolic pathways were also identified, indicating functional shifts during lesion progression. As most studies were conducted in Asia, further research in diverse regions is needed to improve the generalizability of findings. Future studies employing metagenomic sequencing may help identify biomarkers for early pre-cancerous lesions and clarify the role of vaginal microbiota in persistent HPV infection and cervical dysplasia.}, }
@article {pmid40362462, year = {2025}, author = {Chakraborty, N and Holmes-Hampton, G and Rusling, M and Kumar, VP and Hoke, A and Lawrence, AB and Gautam, A and Ghosh, SP and Hammamieh, R}, title = {Delayed Impact of Ionizing Radiation Depends on Sex: Integrative Metagenomics and Metabolomics Analysis of Rodent Colon Content.}, journal = {International journal of molecular sciences}, volume = {26}, number = {9}, pages = {}, pmid = {40362462}, issn = {1422-0067}, support = {xxxxx//AFRRI/ ; }, mesh = {Animals ; Male ; Female ; Mice ; *Metabolomics/methods ; *Metagenomics/methods ; *Radiation, Ionizing ; *Colon/radiation effects/metabolism/microbiology ; *Gastrointestinal Microbiome/radiation effects ; Sex Factors ; Whole-Body Irradiation/adverse effects ; Mice, Inbred C57BL ; }, abstract = {There is an escalating need to comprehend the long-term impacts of nuclear radiation exposure since the permeation of ionizing radiation has been frequent in our current societal framework. A system evaluation of the microbes that reside inside a host's colon could meet this knowledge gap since the microbes play major roles in a host's response to stress. Indeed, our past study suggested that these microbes might break their symbiotic association with moribund hosts to form a pro-survival condition exclusive to themselves. In this study, we undertook metagenomics and metabolomics assays regarding the descending colon content (DCC) of adult mice. DCCs were collected 1 month and 6 months after 7 Gy or 7.5 Gy total body irradiation (TBI). The assessment of the metagenomic diversity profile in DCC found a significant sex bias caused by TBI. Six months after 7.5 Gy TBI, decreased Bacteroidetes were replaced by increased Firmicutes in males, and these alterations were reflected in the functional analysis. For instance, a larger number of networks linked to small chain fatty acid (SCFA) synthesis and metabolism were inhibited in males than in females. Additionally, bioenergy networks showed regression dynamics in females at 6 months post-TBI. Increased accumulation of glucose and pyruvate, which are typical precursors of beneficial SCFAs coupled with the activated networks linked to the production of reactive oxygen species, suggest a cross-sex energy-deprived state. Overall, there was a major chronic adverse implication in male mice that supported the previous literature in suggesting females are more radioresistant than males. The sex-biased chronic effects of TBI should be taken into consideration in designing the pertinent therapeutics.}, }
@article {pmid40361215, year = {2025}, author = {Ma, Y and Jiang, J and Yang, Z and Li, Y and Bai, H and Liu, Z and Zhang, S and Zhi, Z and Yang, Q}, title = {Changes of gastric microflora and metabolites in patients with chronic atrophic gastritis.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {537}, pmid = {40361215}, issn = {1479-5876}, support = {No.21377724D//Hebei Provincial Department of Science and Technology/ ; No. 18//National Administration of Traditional Chinese Medicine Science and Technology/ ; 246W7701D//Provincial Science and Technology Plan of Hebei Province/ ; }, mesh = {Humans ; *Gastritis, Atrophic/microbiology/metabolism ; Chronic Disease ; Middle Aged ; Female ; Male ; RNA, Ribosomal, 16S/genetics ; Metabolome ; *Stomach/microbiology ; Metabolomics ; *Microbiota ; Bacteria/genetics/metabolism ; Adult ; Aged ; *Gastrointestinal Microbiome ; }, abstract = {BACKGROUND: Chronic atrophic gastritis (CAG) is related to the body's microbial and metabolic systems. Combined studies of microbiome and metabolomics can clarify the mechanisms of disease occurrence and progression. We used 16S rRNA sequencing, metagenomics sequencing and metabolomics sequencing to depict the landscapes of bacterium and metabolites, construct correlation networks of different bacterium and metabolites describe potential pathogenic mechanisms of chronic atrophic gastritis.<br><br>METHODS: The gastric juices of 30 non-atrophic gastritis (NAG) patients and 30 CAG patients were collected. Gastric microflora was analyzed by 16S rRNA sequencing and metagenomics sequencing. Gastric metabolites were analyzed by LC-MS analysis. Different bioinformatics methods were used to analyze the data of microbiome and metabolome, and to analyze the relationship between them.<br><br>RESULTS: In atrophic gastritis, bacteria diversity decreased. The genera with a mean decrease in Gini greater than 1.5 included peptostreptococcus, fusobacterium, prevotella, sphingomonas and bacteroides. KEGG pathway included renal cell carcinoma, proximal tubule bicarbonate reclamation, citrate cycle and aldosterone synthesis and secretion with significant enrichment of differential metabolites. Peptostreptococcus, fusobacterium, prevotella and sphingomonas were in pivot positions of the correlation network of differential metabolites and differential bacterium. Viral carcinogenesis, glycine serine and threonine metabolism, RNA polymerase, galactose metabolism and retinol metabolism were enriched in chronic atrophic gastritis based on the metagenomic sequencing data.<br><br>CONCLUSION: Peptostreptococcus, fusobacterium, prevotella, sphingomonas and bacteroides were the essential features that distinguish atrophic gastritis from non-atrophic gastritis, and caused disease by altering various metabolic pathways. Viral carcinogenesis, glycine serine and threonine metabolism, RNA polymerase, galactose metabolism and retinol metabolism may be related to the occurrence and progression of CAG.}, }
@article {pmid40360994, year = {2025}, author = {Zhai, R and Zhao, C and Chang, L and Liu, J and Zhao, T and Jiang, J and Zhu, W}, title = {The gut-liver axis plays a limited role in mediating the liver's heat susceptibility of Chinese giant salamander.}, journal = {BMC genomics}, volume = {26}, number = {1}, pages = {475}, pmid = {40360994}, issn = {1471-2164}, support = {31900327//National Natural Science Foundation of China/ ; 2023NSFSC1153//Natural Science Foundation of Sichuan Province of China/ ; }, mesh = {Animals ; *Liver/metabolism ; *Gastrointestinal Microbiome ; *Caudata/physiology/genetics/microbiology ; Heat-Shock Response ; Transcriptome ; Gene Expression Profiling ; Energy Metabolism ; Larva ; }, abstract = {The Chinese giant salamander (CGS, Andrias davidianus), a flagship amphibian species, is highly vulnerable to high temperatures, posing a significant threat under future climate change. Previous research linked this susceptibility to liver energy deficiency, accompanied by shifts in gut microbiota and reduced food conversion rates, raising questions about the role of the gut-liver axis in mediating heat sensitivity. This study investigated the responses of Chinese giant salamander larvae to a temperature gradient (10-30 °C), assessing physiological changes alongside histological, gut metagenomic, and tissue transcriptomic analyses. Temperatures above 20 °C led to mortality, which resulted in delayed growth. Histological and transcriptomic data revealed metabolic exhaustion and liver fibrosis in heat-stressed salamanders, underscoring the liver's critical role in heat sensitivity. While heat stress altered the gut microbiota's community structure, their functional profiles, especially in nutrient absorption and transformation, remained stable. Both gut and liver showed temperature-dependent transcriptional changes, sharing some common variations in actins, heat shock proteins, and genes related to transcription and translation. However, their energy metabolism exhibited opposite trends: it was downregulated in the liver but upregulated in the gut, with the gut showing increased activity in the pentose phosphate pathway and oxidative phosphorylation, potentially countering metabolic exhaustion. Our findings reveal that the liver of the larvae exhibits greater thermal sensitivity than the gut, and the gut-liver axis plays a limited role in mediating thermal intolerance. This study enhances mechanistic understanding of CGS heat susceptibility, providing a foundation for targeted conservation strategies in the face of climate change.}, }
@article {pmid40360555, year = {2025}, author = {Baek, JW and Lim, S and Park, N and Song, B and Kirtipal, N and Nielsen, J and Mardinoglu, A and Shoaie, S and Kim, JI and Son, JW and Koh, A and Lee, S}, title = {Extensively acquired antimicrobial-resistant bacteria restructure the individual microbial community in post-antibiotic conditions.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {78}, pmid = {40360555}, issn = {2055-5008}, support = {2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; 2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; 2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; 2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; 2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; 2021R1C1C1006336, 2021M3A9G8022959, RS-2024-00419699//National Research Foundation of Korea/ ; HR22C141105//the Korea Health Industry Development Institute/ ; HR22C141105//the Korea Health Industry Development Institute/ ; HR22C141105//the Korea Health Industry Development Institute/ ; HR22C141105//the Korea Health Industry Development Institute/ ; HR22C141105//the Korea Health Industry Development Institute/ ; HR22C141105//the Korea Health Industry Development Institute/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; 2024-ER2108-00, 2024-ER0608-00//Korea National Institute of Health/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; GIST-MIT research Collaboration grant//GIST Research Institute/ ; }, mesh = {Humans ; *Anti-Bacterial Agents/pharmacology ; *Bacteria/drug effects/genetics/classification/isolation &amp; purification ; *Gastrointestinal Microbiome/drug effects/genetics ; *Drug Resistance, Bacterial ; Metagenome ; *Microbiota/drug effects ; Microbial Sensitivity Tests ; Metagenomics ; }, abstract = {In recent years, the overuse of antibiotics has led to the emergence of antimicrobial-resistant (AMR) bacteria. To evaluate the spread of AMR bacteria, the reservoir of AMR genes (resistome) has been identified in environmental samples, hospital environments, and human populations, but the functional role of AMR bacteria and their persistence within individuals has not been fully investigated. Here, we performed a strain-resolved in-depth analysis of the resistome changes by reconstructing a large number of metagenome-assembled genomes from the gut microbiome of an antibiotic-treated individual. Interestingly, we identified two bacterial populations with different resistome profiles: extensively acquired antimicrobial-resistant bacteria (EARB) and sporadically acquired antimicrobial-resistant bacteria, and found that EARB showed broader drug resistance and a significant functional role in shaping individual microbiome composition after antibiotic treatment. Our findings of AMR bacteria would provide a new avenue for controlling the spread of AMR bacteria in the human community.}, }
@article {pmid40358997, year = {2025}, author = {Connan, C and Fromentin, S and Benallaoua, M and Alvarez, AS and Pons, N and Quinquis, B and Morabito, C and Nazare, JA and Borezée-Durant, E and ,  and Haimet, F and Ehrlich, SD and Valeille, K and Cavezza, A and Blottière, H and Veiga, P and Almeida, M and Doré, J and Benamouzig, R}, title = {Associations Among Diet, Health, Lifestyle, and Gut Microbiota Composition in the General French Population: Protocol for the Le French Gut - Le Microbiote Français Study.}, journal = {JMIR research protocols}, volume = {14}, number = {}, pages = {e64894}, pmid = {40358997}, issn = {1929-0748}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology/genetics ; France ; *Life Style ; Feces/microbiology ; *Diet ; Adult ; Prospective Studies ; *Health Status ; Female ; Male ; Metagenomics/methods ; }, abstract = {BACKGROUND: Over the past 2 decades, the gut microbiota has emerged as a key player in human health, being involved in many different clinical contexts. Yet, many aspects of the relationship with its host are poorly documented. One obstacle is the substantial variability in wet-laboratory procedures and data processing implemented during gut microbiota studies, which poses a challenge of comparability and potential meta-analysis.<br><br>OBJECTIVE: The study protocol described here aimed to better understand the relationship between health, dietary habits, and the observed heterogeneity of gut microbiota composition in the general population. "Le French Gut - Le microbiote fran&#xe7;ais" aimed to collect, sequence, and analyze 100,000 fecal samples from French residents using a high-quality shotgun metagenomic pipeline, complemented with comprehensive health, lifestyle, and dietary metadata.<br><br>METHODS: "Le French Gut&#xa0;- Le microbiote fran&#xe7;ais" is a prospective, noninterventional French national study involving individuals, the creation of a biological collection (feces), and the exploitation of data from questionnaires and the National Health Data System (Syst&#xe8;me National des Donn&#xe9;es de Sant&#xe9;). This national study is open to all metropolitan French adult residents, excluding those who have undergone a colectomy or digestive stoma, or who have had a colonoscopy or taken antibiotics in the last 3 months. This is a home-based trial in which volunteers complete a questionnaire with insights about their health and habits, and in which stool samples are self-collected. Data analysis is structured into 6 work packages, each focusing on a specific aspect of the gut microbiome, including its composition and associations with lifestyle, quality of life, and health.<br><br>RESULTS: This paper outlines the study protocol, with recruitment having started in September 2022 and expected to continue until the end of December 2025. As of January 2025, a total of 20,000 participants have been enrolled. The first scientific publications based on the data analysis are expected by mid-2025.<br><br>CONCLUSIONS: "Le French Gut" aims to provide a reference database and new ecosystem tools for understanding the relationship between the gut microbiota, its host, and diet. We expect to be able to find new signatures or targets and promote the design of innovative preventive strategies, personalized nutrition, and precision medicine.<br><br>TRIAL REGISTRATION: ClinicalTrials.gov NCT05758961; https://clinicaltrials.gov/study/NCT05758961.<br><br>DERR1-10.2196/64894.}, }
@article {pmid40356191, year = {2025}, author = {Charalambous, H and Brown, C and Vogazianos, P and Katsaounou, K and Nikolaou, E and Stylianou, I and Papageorgiou, E and Vraxnos, D and Aristodimou, A and Chi, J and Costeas, P and Shammas, C and Apidianakis, Y and Antoniades, A}, title = {Dysbiosis in the Gut Microbiome of Pembrolizumab-Treated Non-Small Lung Cancer Patients Compared to Healthy Controls Characterized Through Opportunistic Sampling.}, journal = {Thoracic cancer}, volume = {16}, number = {9}, pages = {e70075}, pmid = {40356191}, issn = {1759-7714}, support = {//Investigator-Initiated Studies Program of Merck Sharp &amp; Dohme Corp/ ; }, mesh = {Aged ; Female ; Humans ; Male ; Middle Aged ; *Antibodies, Monoclonal, Humanized/therapeutic use/pharmacology/adverse effects ; *Antineoplastic Agents, Immunological/therapeutic use ; *Carcinoma, Non-Small-Cell Lung/drug therapy/pathology/microbiology ; Case-Control Studies ; *Dysbiosis/chemically induced/microbiology/pathology ; *Gastrointestinal Microbiome/drug effects ; *Lung Neoplasms/drug therapy/pathology/microbiology ; Prospective Studies ; Pilot Projects ; }, abstract = {BACKGROUND: The gut microbiome influences the host immune system, cancer development and progression, as well as the response to immunotherapy during cancer treatment. Here, we analyse the composition of the gut bacteriome in metastatic Non-Small Cell Lung Cancer (NSCLC) patients receiving Pembrolizumab immunotherapy within a prospective maintenance trial through opportunistic sampling during treatment.<br><br>METHODS: The gut microbiome profiles of NSCLC patients were obtained from stool samples collected during Pembrolizumab treatment and analysed with 16S rRNA metagenomics sequencing. Patient profiles were compared to a group of healthy individuals of matching ethnic group, age, sex, BMI and comorbidities.<br><br>RESULTS: A significant decrease in the treated patients was observed in two prominent bacterial families of the phylum Firmicutes, Lachnospiraceae and Ruminoccocaceae, which comprised 31.6% and 21.8% of the bacteriome in the healthy group but only 10.9% and 14.2% in the treated patient group, respectively. Species within the Lachnospiraceae and Ruminococcaceae families are known to break down undigested carbohydrates generating short chain fatty acids (SCFA), such as butyrate, acetate and propionate as their major fermentation end-products, which have been implicated in modifying host immune responses. In addition, a significant increase of the Bacteroidacaeae family (Bacteroidetes phylum) was observed from 10.7% in the healthy group to 23.3% in the treated patient group. Moreover, and in agreement with previous studies, a decrease in the Firmicutes to Bacteroidetes ratio in the metastatic NSCLC Pembrolizumab-treated patients was observed.<br><br>CONCLUSION: The observed differences indicate dysbiosis and a compromised intestinal health status in the metastatic NSCLC Pembrolizumab-treated patients. This data could inform future studies of immunotherapy treatment responses and modulation of the gut microbiome to minimise dysbiosis prior or concurrent to treatment.<br><br>TRIAL REGISTRATION: SWIPE Trial (NCT02705820).}, }
@article {pmid40356165, year = {2025}, author = {Park, C and Park, J and Chang, D and Kim, S}, title = {Development of reference-based model for improved analysis of bacterial community.}, journal = {Food research international (Ottawa, Ont.)}, volume = {211}, number = {}, pages = {116380}, doi = {10.1016/j.foodres.2025.116380}, pmid = {40356165}, issn = {1873-7145}, mesh = {RNA, Ribosomal, 16S/genetics ; *Probiotics ; High-Throughput Nucleotide Sequencing/methods ; *Bacteria/genetics/classification ; *Gastrointestinal Microbiome/genetics ; DNA, Bacterial/genetics ; Polymerase Chain Reaction/methods ; }, abstract = {Probiotic bacteria play a vital role in maintaining gut microbial homeostasis and are widely used in various commercial products. Although 16S rRNA amplicon-based next-generation sequencing (NGS) is commonly used to analyze probiotic products, biases can arise from various 16S rRNA amplification regions, sequencing platforms, and library kits. In this study, a reference-based bias correction model was developed to correct sequencing biases. The model was validated using eight mock communities and 12 commercial products, which were analyzed across multiple NGS platforms and various 16S rRNA regions. Specific primer-probe assays were developed for accurate bacterial quantification, and their specificity was validated and used in conjunction with droplet digital PCR (ddPCR) to establish initial bacterial ratios within communities. Analysis of the mock communities revealed platform- and region-specific biases, with specific species consistently over- or under-represented. Similarly, commercial product analyses have shown biased outcomes owing to varying sequencing protocols. The correction model, based on PCR efficiencies from the reference communities, successfully corrected biased ratios across different amplification regions and platforms to achieve results that closely matched the proportions predicted by ddPCR. The model effectively corrected the biases arising from the different polymerases. Notably, partial references containing approximately 40 % of the species achieved correction results that were comparable to those of the complete references. This approach demonstrates the potential for improving microbiome analysis accuracy within predictable ranges, and could serve as a model for addressing sequencing bias in metagenomic research.}, }
@article {pmid40356145, year = {2025}, author = {Wang, S and Zheng, C and Bu, C and Guo, D and Zhang, C and Xie, Q and Pan, J and Sun, J and Chen, W and Jiang, S and Zhai, Q}, title = {Role of sn-2 palmitate on the development of the infant gut microbiome: A metagenomic insight.}, journal = {Food research international (Ottawa, Ont.)}, volume = {211}, number = {}, pages = {116488}, doi = {10.1016/j.foodres.2025.116488}, pmid = {40356145}, issn = {1873-7145}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/genetics ; *Infant Formula/chemistry ; Infant ; Feces/microbiology ; *Metagenomics/methods ; Milk, Human/chemistry ; Female ; Male ; Breast Feeding ; *Palmitates/pharmacology ; Infant, Newborn ; Phylogeny ; }, abstract = {The infant gut microbiome, which develops from birth, has profound and lasting effects on human health. Its establishment in early life is influenced by events such as delivery mode and feeding type. This study examined the effects of formula milk enriched with sn-2 palmitate on the gut microbiota of healthy term infants. We conducted a 16-week comparative analysis of three feeding groups: infants receiving high sn-2 palmitate formula (n = 30), regular vegetable oil formula (n = 32), and breast milk (n = 30). Using shotgun metagenomic sequencing of fecal samples, we performed a comprehensive assessment of the gut microbiota. While overall microbial composition and diversity were comparable across groups, the functional profile of the microbiome in infants receiving sn-2 palmitate-enriched formula more closely resembled that of breastfed infants compared to the control formula group. This similarity extended to microbial species interactions, virulence gene abundance, and metabolic pathway expression patterns. In addition, sn-2 palmitate promoted the proliferation of Bifidobacterium breve and enhanced the robustness of the gut microbial ecology. Notably, the phylogenetic analysis of B. breve strains in the sn-2 palmitate group showed closer alignment with the breastfed group compared to the control group. These findings suggest that sn-2 palmitate-enriched formula may confer gut microbiota functional benefits that more closely resemble those of breast milk compared to control formula milk. This study provides scientific evidence for the development of future functional infant formulas.}, }
@article {pmid40356136, year = {2025}, author = {Luo, Y and Tang, R and Huang, Y}, title = {Differences in structure, antioxidant capacity and gut microbiota modulation of red raspberry pectic polysaccharides extracted by different methods.}, journal = {Food research international (Ottawa, Ont.)}, volume = {211}, number = {}, pages = {116474}, doi = {10.1016/j.foodres.2025.116474}, pmid = {40356136}, issn = {1873-7145}, mesh = {*Gastrointestinal Microbiome/drug effects ; *Rubus/chemistry ; *Antioxidants/pharmacology/chemistry ; *Pectins/chemistry/pharmacology ; Prebiotics/analysis ; *Polysaccharides/chemistry/pharmacology ; *Fruit/chemistry ; Humans ; *Plant Extracts/chemistry/pharmacology ; }, abstract = {Red raspberries are associated with various health benefits, with pectic polysaccharides as their primary component and potential key contributor to these effects. This study aimed to evaluate the antioxidant and prebiotic potential of four red raspberry pectic polysaccharides (RP)-EN-RP (enzyme-assisted extraction), AC-RP (acid-assisted extraction), AL-RP (alkali-assisted extraction), and US-RP (ultrasound-assisted extraction)-and to elucidate the relationship between their structure and function. AC-RP and US-RP contained higher proportions of homogalacturonan (HG) at 50.92 % and 53.10 %, respectively, while EN-RP and AL-RP exhibited higher proportions of rhamnogalacturonan-I (RG-I) at 63.89 % and 43.37 %, respectively. All four polysaccharides demonstrated significant antioxidant and prebiotic properties. AL-RP exhibited the strongest DPPH radical scavenging activity, while US-RP showed the highest hydroxyl radical scavenging ability. These pectic polysaccharides were highly fermentable, significantly modulating gut microbiota composition and promoting the production of propionic acid, particularly EN-RP and AL-RP. Compared to the blank group, RP intervention significantly enriched Bacteroides, Phocaeicola, Bifidobacterium, Limosilactobacillus, and Paraprevotella. Carbohydrate-active enzyme genes in metagenomes revealed that glycoside hydrolases played a vital role in the degradation and utilization of red raspberry polysaccharides. Furthermore, correlation analysis indicated that a higher RG-I proportion and an elevated Rha/GalA ratio enhanced the abundance of certain beneficial microbial species and increased propionic acid production. These findings advance the understanding of the structure-function relationship of natural pectic polysaccharides and highlight their potential for tailoring gut microbiota and promoting health through precise dietary interventions.}, }
@article {pmid40355758, year = {2025}, author = {Saeedi Saravi, SS and Pugin, B and Constancias, F and Shabanian, K and Spalinger, M and Thomas, A and Le Gludic, S and Shabanian, T and Karsai, G and Colucci, M and Menni, C and Attaye, I and Zhang, X and Allemann, MS and Lee, P and Visconti, A and Falchi, M and Alimonti, A and Ruschitzka, F and Paneni, F and Beer, JH}, title = {Gut microbiota-dependent increase in phenylacetic acid induces endothelial cell senescence during aging.}, journal = {Nature aging}, volume = {5}, number = {6}, pages = {1025-1045}, pmid = {40355758}, issn = {2662-8465}, support = {//Wellcome Trust/United Kingdom ; #21A053//Novartis Stiftung f&#xfc;r Medizinisch-Biologische Forschung (Novartis Foundation for Medical-Biological Research)/ ; #310030_21A053//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (Swiss National Science Foundation)/ ; #CRSK-3_229134//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (Swiss National Science Foundation)/ ; }, mesh = {*Gastrointestinal Microbiome/physiology ; Animals ; *Phenylacetates/metabolism/blood ; *Cellular Senescence/physiology/drug effects ; *Aging/metabolism ; Humans ; Mice ; *Endothelial Cells/metabolism ; Male ; Clostridium/metabolism ; Mice, Inbred C57BL ; Hydrogen Peroxide/metabolism ; Female ; Glutamine/analogs &amp; derivatives/metabolism ; Feces/microbiology/chemistry ; Aged ; Mitochondria/metabolism ; Sirtuin 1/metabolism ; }, abstract = {Endothelial cell senescence is a key driver of cardiovascular aging, yet little is known about the mechanisms by which it is induced in vivo. Here we show that the gut bacterial metabolite phenylacetic acid (PAA) and its byproduct, phenylacetylglutamine (PAGln), are elevated in aged humans and mice. Metagenomic analyses reveal an age-related increase in PAA-producing microbial pathways, positively linked to the bacterium Clostridium sp. ASF356 (Clos). We demonstrate that colonization of young mice with Clos increases blood PAA levels and induces endothelial senescence and angiogenic incompetence. Mechanistically, we find that PAA triggers senescence through mitochondrial H2O2 production, exacerbating the senescence-associated secretory phenotype. By contrast, we demonstrate that fecal acetate levels are reduced with age, compromising its function as a Sirt1-dependent senomorphic, regulating proinflammatory secretion and redox homeostasis. These findings define PAA as a mediator of gut-vascular crosstalk in aging and identify sodium acetate as a potential microbiome-based senotherapy to promote healthy aging.}, }
@article {pmid40355385, year = {2025}, author = {Wang, L and Chen, Y and Wang, Q and Wang, F}, title = {Microbial imbalances linked to early pregnancy loss: a comparative analysis of vaginal microbiota.}, journal = {The journal of maternal-fetal &amp; neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians}, volume = {38}, number = {1}, pages = {2496787}, doi = {10.1080/14767058.2025.2496787}, pmid = {40355385}, issn = {1476-4954}, mesh = {Humans ; Female ; Pregnancy ; *Vagina/microbiology ; Case-Control Studies ; *Abortion, Spontaneous/microbiology ; Adult ; *Microbiota ; Young Adult ; }, abstract = {OBJECTIVE: To explore the role and related functions of vaginal microbiota in early pregnancy loss.<br><br>METHODS: This study was a case-control study with a comparison group (reference group). We recruited 178 women, including 73 who had experienced at least one early clinical pregnancy loss and 105 patients with one live birth and no history of pregnancy loss. Data on demographics, disease history, menstrual and reproductive history was collected. The case group patients were sampled immediately upon presenting with pregnancy loss at their first visit. The reference group patients underwent samples when they chose to participate voluntarily. All vaginal discharge was performed DNA Preparation and Metagenomics Sequencing. DNA extraction was performed using the phenol/trichloromethane method and the DNA fragments were then size-selected to 300-700 bp using magnetic beads. The selected fragments were repaired and ligated with indexed adaptors. The captured DNA was amplified again by PCR and circularized to create a single-stranded circular (ssCir) library. The ssCir library was subsequently amplified through rolling circle amplification (RCA) to produce DNA nanoballs (DNBs). The DNBs were then loaded onto a flow cell and sequenced using the DNBSEQ Platform. Nonparametric tests, including Kruskal-Wallis and Wilcoxon tests, were employed. Relative abundance between groups was compared, and differential species selection was performed using the LEfSe software with linear discriminant analysis.<br><br>RESULTS: 1. PCoA analysis based on Bray-Curtis distances at the species level revealed a difference between the groups (p = 0.011). At the genus level, &#x3b1;-diversity, assessed using the Shannon, Simpson, and Inverse Simpson indices, indicated higher bacterial richness and diversity in the control group (Shannon: mean 0.554 vs. 0.383, p = 0.0044; Simpson: mean 0.254 vs. 0.179, p = 0.0043; Inverse Simpson: mean 1.636 vs. 1.414, p = 0.0043); At the genus level, 107 microbial genera were identified, 18 of which displayed statistically significant differences. At the species level, 23 microbial species showed significant differences between the two groups. 2. We analyzed the differences in the most abundant phyla, genera, and species, with a particular focus on the top 20 most abundant genera and species. Firmicutes and Proteobacteria were significantly more prevalent among patients with pregnancy loss (PL). Among the top 20 most abundant genera, Streptococcus and Porphyromonas were significantly more abundant in patients with PL, whereas Bifidobacterium was significantly more prevalent in the reference group. Among the 20 most abundant species, Lactobacillus crispatus was significantly more prevalent in patients with PL, whereas common in the control group. 3. Principal Coordinates Analysis (PCoA) of Bray-Curtis distances, highlight their distinct clustering patterns, suggesting a notable difference between the metabolic pathways of the two groups. Key pathways with a negative correlation to PL include those related to amino acid biosynthesis, lipid metabolism, and nucleotide biosynthesis.<br><br>CONCLUSION: Our study highlights the association between vaginal microbiota dysbiosis and EPL, identifying specific microbial taxa that may contribute to pregnancy loss. These findings underscore the importance of the vaginal microbiome in reproductive health and open up new avenues for research into microbiome-based diagnostics and therapies. By integrating microbial, immune, and environmental data, future research has the potential to uncover the mechanisms underlying EPL and develop targeted interventions to improve pregnancy outcomes.}, }
@article {pmid40354675, year = {2025}, author = {Zhi, N and Chang, X and Zha, L and Zhang, K and Wang, J and Gui, S}, title = {Platycodonis radix polysaccharides suppress progression of high-fat-induced obesity through modulation of intestinal microbiota and metabolites.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {142}, number = {}, pages = {156653}, doi = {10.1016/j.phymed.2025.156653}, pmid = {40354675}, issn = {1618-095X}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Male ; Mice, Inbred C57BL ; *Polysaccharides/pharmacology ; *Obesity/drug therapy/metabolism ; *Platycodon/chemistry ; Diet, High-Fat/adverse effects ; Mice ; Fatty Acids, Volatile/metabolism ; *Anti-Obesity Agents/pharmacology ; Drugs, Chinese Herbal ; }, abstract = {BACKGROUND: Obesity is a prevalent chronic condition worldwide, posing a significant risk to public health. Polysaccharides derived from Platycodonis Radix (PR) have been identified as the primary bioactive compounds in combating obesity, although the underlying molecular mechanisms remain inadequately understood.<br><br>PURPOSE: The purpose of the research is to analyze the potential anti-obesity influnces within PR polysaccharides (PG: PG1 and PG2) by analyzing their impact on gut microbiota (GM) composition, SCFA and BA metabolism, and the regulation of associated gene and protein expression.<br><br>STUDY DESIGN AND METHODS: In this research, 7-week-old male C57BL/6 mice were assigned to a HFD or a control chow diet for 90 days to evaluate the therapeutic effects of PG intervention. Metagenomic analysis was performed to assess GM alterations, while GC-MS and LC-MS were used to quantify SCFA and BA concentrations in cecal contents, respectively. Furthermore, the effects of PG on SCFA- and BA-associated metabolic pathways were examined through qRT-PCR and WB.<br><br>RESULTS: PG1 demonstrated superior efficacy compared to PG2 in reducing HFD-induced obesity and associated metabolic disturbances. High-dose PG1 treatment effectively inhibited weight gain, dyslipidemia, inflammation, liver damage, and fat deposition caused by the HFD. Additionally, PG1 treatment primarily promoted the abundance of SCFA-producing bacteria, enhanced the expression of GPR41 and GPR43 genes, significantly elevated levels of GLP-1 and PYY, and improved circulating leptin and adiponectin levels. The intervention with PG1 notably enhanced the relative abundances of bacteria involved in the production of secondary BAs, such as Lachnospiraceae_NK4A136 and Eubacterium coprostanoligenes. This augmentation facilitated the transformation of primary BAs into secondary forms, diminished the relative expression of intestinal FXR and FGF15, and reduced FGFR4 levels. Consequently, this led to an upregulation of hepatic CYP7A1, accelerating liver cholesterol metabolism and the synthesis of new BAs.<br><br>CONCLUSION: Supplementation with PG1 protects mice from obesity induced by an HFD. The observed protective effects of PG1 appear to be primarily mediated through the activation of the GM-SCFA-GPR pathway and the inhibition of the GM-BA-FXR-FGF15 signaling pathway.}, }
@article {pmid40350519, year = {2025}, author = {Schultz, J and Jamil, T and Sengupta, P and Sivabalan, SKM and Rawat, A and Patel, N and Krishnamurthi, S and Alam, I and Singh, NK and Raman, K and Rosado, AS and Venkateswaran, K}, title = {Genomic insights into novel extremotolerant bacteria isolated from the NASA Phoenix mission spacecraft assembly cleanrooms.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {117}, pmid = {40350519}, issn = {2049-2618}, support = {BAS/1/1096-01-01//KAUST Baseline Grant/ ; PPR-ROSES-2006//National Aeronautical and Space Administration/ ; }, mesh = {*Spacecraft ; United States National Aeronautics and Space Administration ; *Bacteria/genetics/isolation &amp; purification/classification ; United States ; Biofilms/growth &amp; development ; Space Flight ; *Extremophiles/genetics/isolation &amp; purification/classification ; *Genome, Bacterial ; Humans ; Microbiota/genetics ; Genomics ; Metagenome ; Phylogeny ; }, abstract = {BACKGROUND: Human-designed oligotrophic environments, such as cleanrooms, harbor unique microbial communities shaped by selective pressures like temperature, humidity, nutrient availability, cleaning reagents, and radiation. Maintaining the biological cleanliness of NASA's mission-associated cleanrooms, where spacecraft are assembled and tested, is critical for planetary protection. Even with stringent controls such as regulated airflow, temperature management, and rigorous cleaning, resilient microorganisms can persist in these environments, posing potential risks for space missions.<br><br>RESULTS: During the Phoenix spacecraft mission, genomes of 215 bacterial isolates were sequenced and based on overall genome-related indices, 53 strains belonging to 26 novel species were recognized. Metagenome mapping indicated less than 0.1% of the reads associated with novel species, suggesting their rarity. Genes responsible for biofilm formation, such as BolA (COG0271) and CvpA (COG1286), were predominantly found in proteobacterial members but were absent in other non-spore-forming and spore-forming species. YqgA (COG1811) was detected in most spore-forming members but was absent in Paenibacillus and non-spore-forming species. Cell fate regulators, COG1774 (YaaT), COG3679 (YlbF, YheA/YmcA), and COG4550 (YmcA, YheA/YmcA), controlling sporulation, competence, and biofilm development processes, were observed in all spore-formers but were missing in non-spore-forming species. COG analyses further revealed resistance-conferring proteins in all spore-formers (n&#x2009;=&#x2009;13 species) and eight actinobacterial species, responsible for enhanced membrane transport and signaling under radiation (COG3253), transcription regulation under radiation stress (COG1108), and DNA repair and stress responses (COG2318). Additional functional analysis revealed that Agrococcus phoenicis, Microbacterium canaveralium, and Microbacterium jpeli contained biosynthetic gene clusters (BGCs) for &#x3b5;-poly-L-lysine, beneficial in food preservation and biomedical applications. Two novel Sphingomonas species exhibited&#xa0;for&#xa0;zeaxanthin, an antioxidant beneficial for eye health. Paenibacillus canaveralius harbored genes for bacillibactin, crucial for iron acquisition. Georgenia phoenicis had BGCs for alkylresorcinols, compounds with antimicrobial and anticancer properties used in food preservation and pharmaceuticals.<br><br>CONCLUSION: Despite stringent decontamination and controlled environmental conditions, cleanrooms harbor unique bacterial species that form biofilms, resist various stressors, and produce valuable biotechnological compounds. The reduced microbial competition in these environments enhances the discovery of novel microbial diversity, contributing to the mitigation of microbial contamination and fostering biotechnological innovation. Video Abstract.}, }
@article {pmid40350492, year = {2025}, author = {Ding, Y and Ke, J and Hong, T and Zhang, A and Wu, X and Jiang, X and Shao, S and Gong, M and Zhao, S and Shen, L and Chen, S}, title = {Microbial diversity and ecological roles of halophilic microorganisms in Dingbian (Shaanxi, China) saline-alkali soils and salt lakes.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {287}, pmid = {40350492}, issn = {1471-2180}, support = {STEP 2024QZKK02010//Supported by the Second Tibetan Plateau Scientific Expedition and Research Program/ ; 2208085MC39//Natural Science Foundation of Anhui Province, China/ ; }, mesh = {China ; *Lakes/microbiology/chemistry ; RNA, Ribosomal, 16S/genetics ; *Soil Microbiology ; *Archaea/classification/genetics/isolation &amp; purification ; Phylogeny ; DNA, Archaeal/genetics ; Salinity ; *Biodiversity ; Alkalies/analysis ; Soil/chemistry ; High-Throughput Nucleotide Sequencing ; Sodium Chloride ; Sequence Analysis, DNA ; Bacteria/classification/genetics ; }, abstract = {Halophilic microorganisms abound in numerous hypersaline environments, such as salt lakes, salt mines, solar salterns, and salted seafood. In the northwest of Dingbian county (Shaanxi province, China), there exists a belt of hypersaline habitats extending from the west to the north consisting of saline-alkali soil and salt lakes. Theoretically, such a hypersaline environment has a high probability of containing abundant halophilic archaea communities. Nevertheless, there is nearly no systematic research on halophilic archaea in this area. Here, we employed a combination of culture-dependent and culture-independent methods to analyze the collected samples. The high-throughput sequencing results of the archaeal 16S rRNA gene indicated that the richness of halophilic archaea in saline-alkali soils was significantly higher than that in salt lakes. In saline-alkali soils, the Natronomonas genus of archaea was more predominant compared to other genera, while in salt lakes, the Halonotius, Halorubrum, and Haloarcula genera of archaea had relatively higher abundances. However, the dominant families of halophilic archaea in both environments were mainly Haloferacaceae (30.96-72%), Halomicrobiaceae (17-53.19%) and Nanosalinaceae (1-19.08%). Based on the outcomes of pure culture experiments, a total of 26 genera and 98 strains were identified. Among the identified halophilic microorganisms, the predominant species were Halorubrum and Fodinibius, accounting for 33.67% and 13.27%, respectively. The remainder were mostly low-abundance groups within the community, and 22 potential novel taxa were discovered. Additionally, metagenomic technology was employed in our research. The analysis results demonstrated that the microorganisms in this area possess metabolic pathways capable of degrading various pollutants such as atrazine, methane, and dioxins, suggesting that some microorganisms in this area play a positive role in environmental remediation. This study roughly reveals the diversity composition and dominant species of halophilic archaea in these hypersaline environments and provides a scientific basis for the possible ecological functions of microorganisms in this area during long-term survival. It also offers scientific evidence for the development and utilization of halophilic microbial resources and ecological protection.}, }
@article {pmid40350460, year = {2025}, author = {Zhang, X and Zhong, R and Wu, J and Tan, Z and Jiao, J}, title = {Dietary selection of distinct gastrointestinal microorganisms drives fiber utilization dynamics in goats.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {118}, pmid = {40350460}, issn = {2049-2618}, support = {32372829, 31972992//National Natural Science Foundation of China/ ; 2023JJ10047//Hunan Provincial Natural Science Foundation of China/ ; 2022RC1158//The Science and Technology innovation Program of Hunan Province/ ; 2023382//Youth Innovation Promotion Association CAS/ ; }, mesh = {Animals ; *Goats/microbiology ; *Dietary Fiber/metabolism ; *Gastrointestinal Microbiome ; Rumen/microbiology/metabolism ; Animal Feed/analysis ; Metagenomics/methods ; Fermentation ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Fibrobacter/metabolism/genetics/isolation &amp; purification ; Ruminococcus/metabolism/genetics/isolation &amp; purification ; Diet/veterinary ; Cecum/microbiology/metabolism ; Cellulose/metabolism ; Fatty Acids, Volatile/metabolism ; Polysaccharides/metabolism ; *Gastrointestinal Tract/microbiology ; }, abstract = {BACKGROUND: Dietary fiber is crucial to animal productivity and health, and its dynamic utilization process is shaped by the gastrointestinal microorganisms in ruminants. However, we lack a holistic understanding of the metabolic interactions and mediators of intestinal microbes under different fiber component interventions compared with that of their rumen counterparts. Here, we applied nutritional, amplicon, metagenomic, and metabolomic approaches to compare characteristic microbiome and metabolic strategies using goat models with fast-fermentation fiber (FF) and slow-fermentation fiber (SF) dietary interventions from a whole gastrointestinal perspective.<br><br>RESULTS: The SF diet selected fibrolytic bacteria Fibrobacter and Ruminococcus spp. and enriched for genes encoding for xylosidase, endoglucanase, and galactosidase in the rumen and cecum to enhance cellulose and hemicellulose utilization, which might be mediated by the enhanced microbial ATP production and cobalamin biosynthesis potentials in the rumen. The FF diet favors pectin-degrading bacteria Prevotella spp. and enriched for genes encoding for pectases (PL1, GH28, and CE8) to improve animal growth. Subsequent SCFA patterns and metabolic pathways unveiled the favor of acetate production in the rumen and butyrate production in the cecum for SF goats. Metagenomic binning verified this distinct selection of gastrointestinal microorganisms and metabolic pathways of different fiber types (fiber content and polysaccharide chemistry).<br><br>CONCLUSIONS: These findings provide novel insights into the key metabolic pathways and distinctive mechanisms through which dietary fiber types benefit the host animals from the whole gastrointestinal perspective. Video Abstract.}, }
@article {pmid40350266, year = {2025}, author = {Ohyama, Y and Miura, T and Furukawa, M and Shimamura, M and Asami, Y and Yamazoe, A and Uchino, Y and Kawasaki, H}, title = {A HPLC-based Method for Counting the Genome Copy Number of Cells Allows the Production of a High-quality Mock Community of Bacterial Cells.}, journal = {Microbes and environments}, volume = {40}, number = {2}, pages = {}, doi = {10.1264/jsme2.ME24076}, pmid = {40350266}, issn = {1347-4405}, mesh = {Chromatography, High Pressure Liquid/methods ; *Bacteria/genetics/isolation &amp; purification/classification ; Humans ; *Microbiota/genetics ; *Genome, Bacterial ; Metagenomics/methods ; Reproducibility of Results ; }, abstract = {Improving the reliability of a metagenomic sequencing ana-lysis requires the use of control samples, known as mock communities. Therefore, mock communities must be prepared with high accuracy and reproducibility, which is particularly challenging for cellular mock communities. In the present study, we prepared a cellular mock community consisting of bacterial strains representative of the human and surrounding environmental microbiomes to demonstrate the suitability of a HPLC-based method that measures the genome number of cells. This method proved to be more accurate and reproducible for preparing cellular mock communities than traditional cell counting-based enumeration methods.}, }
@article {pmid40350102, year = {2025}, author = {El-Son, MAM and Elbahnaswy, S and Khormi, MA and Aborasain, AM and Abdelhaffez, HH and Zahran, E}, title = {Harnessing the fish gut microbiome and immune system to enhance disease resistance in aquaculture.}, journal = {Fish &amp; shellfish immunology}, volume = {163}, number = {}, pages = {110394}, doi = {10.1016/j.fsi.2025.110394}, pmid = {40350102}, issn = {1095-9947}, mesh = {Animals ; *Gastrointestinal Microbiome/immunology ; *Aquaculture/methods ; *Fishes/immunology/microbiology ; *Disease Resistance/immunology ; Probiotics/administration &amp; dosage ; *Fish Diseases/immunology/prevention &amp; control/microbiology ; Prebiotics/administration &amp; dosage ; Diet/veterinary ; }, abstract = {The increasing global reliance on aquaculture is challenged by disease outbreaks, exacerbated by antibiotic resistance, and environmental stressors. Traditional strategies, such as antibiotic treatments and chemical interventions, are becoming less effective, necessitating a shift toward microbiota-based disease control. The fish gut microbiome is a key determinant of immune homeostasis and pathogen resistance. However, previous reviews lack integration of microbiome engineering, machine learning, and next-generation sequencing in fish health strategies. This review encompasses recent advancements in microbiome research, including dietary strategies such as prebiotics, probiotics, synbiotics, and phytogenic feed additives. It synthesizes the latest metagenomic insights, microbiota modulation techniques, and AI-driven disease prediction models. It presents a novel conceptual framework for disease control using microbiome-based approaches in aquaculture. Additionally, we explore emerging methodologies, including microbiota transplantation and synthetic probiotics, to develop precision microbiome interventions. By bridging existing knowledge gaps, this review provides actionable insights into sustainable aquaculture practices through microbiome-driven disease resistance.}, }
@article {pmid40349412, year = {2025}, author = {Ren, P and You, C and Chen, P and Mei, X and Yang, T and Xu, Y and Wang, X and Shen, Q and Wei, Z}, title = {Organic amendments derived from Chinese herb residues enhance soil ecosystem multifunctionality by enriching key microorganisms.}, journal = {Microbiological research}, volume = {298}, number = {}, pages = {128213}, doi = {10.1016/j.micres.2025.128213}, pmid = {40349412}, issn = {1618-0623}, mesh = {*Soil Microbiology ; *Soil/chemistry ; *Ecosystem ; Fertilizers/analysis ; Bacteria/classification/genetics/isolation &amp; purification ; China ; Biodiversity ; Lysobacter ; }, abstract = {Ecosystem multifunctionality (EMF), a key metric reflecting soil health, has been proven to be positively influenced by organic amendments. Chinese herb residues (CHR), rich in bioactive compounds and with lower ecological risks, are regarded as a promising source for organic amendments. Therefore, we conducted a greenhouse experiment with four treatments: no fertilizer (CK), chemical fertilizer (CF), single application of CHR-OA (OA), and partially replacing chemical fertilizers with CHR-OA (OA-CF), aiming to explore the regulatory mechanism of CHR-OA addition to EMF. A total of 19 ecosystem functions, covering plant growth, pathogen suppression, soil physicochemical properties, and microbial diversity, were used to calculate EMF. The results showed that most of the above ecosystem functions were improved by adding CHR-OA, with the OA-CF possessing the highest EMF, followed by OA. Additionally, Lysobacter was enriched as a key genus. Further analysis revealed that Lysobacter drove EMF by influencing bacterial Simpson index, plant height, and root length, and this conclusion was confirmed in greenhouse verification experiments. Through this study, we have gained a clearer understanding of the prominent ecosystem functions provided by CHR-OA and the regulatory mechanism of EMF.}, }
@article {pmid40349120, year = {2025}, author = {Jiang, S and Huang, S and Zhang, Z and Ma, W and Han, Z and Song, Y and Huo, D and Cui, W and Zhang, J}, title = {Gut microbiota drives structural variation of exogenous probiotics to enhance colonization.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2503371}, pmid = {40349120}, issn = {1949-0984}, mesh = {*Probiotics/pharmacology ; *Gastrointestinal Microbiome/genetics ; Animals ; Mice ; *Lactobacillus plantarum/genetics/growth &amp; development ; Gastrointestinal Tract/microbiology ; Bile Acids and Salts ; Metagenomics ; }, abstract = {Probiotics encounter colonization resistance from native gut microbiomes, affecting their effectiveness. Genetic engineering of probiotics lacks universal applicability, as gut microbiotas are highly individualized. Here, we employed probiotic Lactiplantibacillus plantarum HNU082 (Lp082) to test whether Lp082 gut-adapted mutants can resolve colonization resistance in a new gut environment. Relying on culture-based methods and metagenomics, two distinct evolutionary clades of Lp082 in mice gut were observed, where one clade, which acquired more mutations, exhibited a longer survival time. However, these Lp082 isolates carrying many single nucleotide variants (SNVs) still exhibited phenotypic inconsistencies, with 13 strains of enhanced acid resistance. Thus, nanopore sequencing was proposed to identify structural variations (SVs). Among them, 12 strains had the Cro/C1-type HTH DNA-binding domain insertion, which enhanced growth and reproduction under bile salt stress, thereby increasing colonization time and quantity in the gut. The gut domestication process can drive probiotics to undergo many SNVs and SVs, thereby enhancing their colonization ability, which provides new insights into the colonization mechanisms and offers an ecology-based strategy.}, }
@article {pmid40348945, year = {2025}, author = {Chen, J and Liu, J and Liu, S and Li, Z and Gao, C and Wang, Z and Huang, S and Jiang, Z and Yang, H}, title = {Multiomics reveals the synergistic response of gut microbiota and spider A. ventricosus to lead and cadmium toxicity.}, journal = {Bulletin of environmental contamination and toxicology}, volume = {114}, number = {5}, pages = {77}, pmid = {40348945}, issn = {1432-0800}, support = {32001205//National Natural Science Foundation of China/ ; 2023JJ30299//Natural Science Foundation of Hunan Province/ ; 2019JJ50236//Natural Science Foundation of Hunan Province/ ; }, mesh = {Animals ; *Cadmium/toxicity ; *Gastrointestinal Microbiome/drug effects ; *Lead/toxicity ; *Spiders/physiology/drug effects ; Metagenomics ; Multiomics ; }, abstract = {The potential crosstalk between the host and gut microbiota (GM) under heavy metal compound pollution remains unexplored. Herein, using comprehensive analysis of metagenomics, metabolomics, behavioral analysis, and cell morphology to investigate the causal relationship between GM and host responses to cadmium (Cd) and lead (Pb) toxicities. Results indicate that Pb and Cd pollution, alone or together, hinder spider predatory behavior and change the composition and function of GM. Combined exposure reduces protein and exogenous compound metabolism, while single exposure affects energy and lipid metabolism. Gut microbiota helps spider antioxidant activity by increasing glutathione, lipoic acid, and L-cysteine. Oxidative damage, increased Enterobacteriaceae (Salmonella), and lipopolysaccharide (LPS) may harm the midgut barrier. Upregulation of choline and acetylcholine, and downregulation of spermidine, may initiate neurotoxicity. Inhibiting actinomycetes might boost sodium gallate for detoxifying single contaminants. Combined pollution detoxification may involve downregulation of indole synthesis metabolic bacteria, tryptophan, indole metabolites, cytochrome P450 (CYP450), and an increase in Desulfobulbia could remove heavy metals and reduce oxidative stress. Combined pollution has a synergistic effect, making the toxicity of multiple pollutants greater than their individual effects, impacting metal resistance genes (MRGs), and antibiotic resistance ontology (AROs) which used for classifying and describing antibiotic resistance, midgut barrier integrity, oxidative stress, and detoxification. The results help to elucidate the interplay of GM and host's reactions, and aid in monitoring and bioremediation of heavy metal pollution.}, }
@article {pmid40348492, year = {2025}, author = {Quigley, EMM}, title = {Microbial Influences on Irritable Bowel Syndrome.}, journal = {Gastroenterology clinics of North America}, volume = {54}, number = {2}, pages = {351-365}, doi = {10.1016/j.gtc.2024.12.003}, pmid = {40348492}, issn = {1558-1942}, mesh = {*Irritable Bowel Syndrome/microbiology ; Humans ; *Gastrointestinal Microbiome ; Feces/microbiology ; Metabolomics ; Metagenomics ; Dysbiosis ; }, abstract = {Since the description of postinfection irritable bowel syndrome (IBS), a role for gut microbes in the pathogenesis of IBS has been proposed. Molecular microbiological tools have now been applied to IBS, though data are largely derived from fecal samples with attendant limitations. Metagenomics, metabolomics, and other 'omics facilitate a comprehensive picture of the microbiome and its metabolic activity. Has a microbial signature characteristic of IBS been identified? The answer is no; this should not be a surprise given the heterogeneity of the phenotype and each individual's microbiome profile.}, }
@article {pmid40348210, year = {2025}, author = {Lin, Z and Zhang, P and Shi, D and Zhang, Y and Wu, W and Tang, Q and Wang, Q and Wang, S}, title = {Association between the gut microbiota and cystitis: A two-sample mendelian randomization study combined with the GEO database.}, journal = {Microbial pathogenesis}, volume = {205}, number = {}, pages = {107683}, doi = {10.1016/j.micpath.2025.107683}, pmid = {40348210}, issn = {1096-1208}, mesh = {*Cystitis/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; Humans ; *Mendelian Randomization Analysis ; Polymorphism, Single Nucleotide ; Genome-Wide Association Study ; Metagenomics ; Dysbiosis/microbiology ; Feces/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: Disturbances within the intestinal microbiota have emerged as a significant factor contributing to systemic inflammation, thereby rendering distant anatomical sites more vulnerable to various illnesses, including inflammatory conditions in the urinary tract such as cystitis. However, the causal relationship between dysbiosis of the gut microbiota and cystitis remains unclear. We sought to elucidate the causal relationship between the intestinal microbiota and cystitis employing Mendelian randomization (MR), offering insights into novel preventive and therapeutic strategies for managing cystitis.<br><br>METHOD: Summary statistics for the Genome-Wide Association Study (GWAS) of cystitis were sourced from the R5 release dataset provided by the FinnGen consortium, which included 8081 cystitis cases and 195,140 controls. Single Nucleotide Polymorphisms (SNPs) that showed strong associations with 196 microbial taxa (encompassing 18,340 individuals) were selected as instrumental variables. To analyze the causal relationships between cystitis and gut microbiota, we employed four MR analysis methods: random effects, inverse variance weighting, weighted medians, and MR-Egger regression. Sensitivity analyses were performed using the Cochran's Q test, funnel plots, leave-one-out analyses, and the MR-Egger intercept test. We conducted metagenomic analysis of fecal samples from 7 patients with cystitis and 7 healthy controls to validate the findings from our MR results. To further elucidate the biological mechanisms, we conducted positional mapping of the extracted SNPs associated with the significant taxa. Additionally, we curated differentially expressed genes (DEGs) from three datasets about cystitis obtained from the Gene Expression Omnibus (GEO). Finally, we intersected the DEGs with the mapped genes to identify common genes of cystitis.<br><br>RESULTS: Our analysis revealed significant associations between specific gut microbiota and cystitis. IVW results revealed that four gut microorganisms, specifically, the genus RuminococcaceaeUCG011, genus Sutterella, family Porphyromonadaceae, and family Veillonellaceae (P&#xa0;<&#xa0;0.05), contributed to a reduction in the incidence of cystitis. Similarly, four cystitis-related bacteria, namely, the genus Marvinbryantia, the genus Odoribacter, the genus Ruminiclostridium6, and the genus Sellimonas, are thought to play a significant role in elevating the risk of cystitis (P&#xa0;<&#xa0;0.05). The metagenomic analysis revealed significant differences in the abundance of the genera Sutterella and Odoribacter in patients with cystitis compared to healthy controls. Additionally, we mapped causal SNPs to genes and identified 62 genes. Bioinformatics analysis reveals 161 common DEGs in cystitis. Through MR and bioinformatics analysis, we identified two common genes-ICAM1 and HP-as potential targets for cystitis.<br><br>CONCLUSION: Our research identified genetic connections between eight components of gut microbiota and two genes related to cystitis. These results offer important insights for subsequent studies into the complex relationship between gut microbiota and cystitis.}, }
@article {pmid40347566, year = {2025}, author = {Jiang, J and Wu, H and Yuan, Y}, title = {Comparative analysis of different Phyllostachys species on gut microbiome and fecal metabolome in giant pandas (Ailuropoda melanoleuca).}, journal = {Comparative biochemistry and physiology. Part D, Genomics &amp; proteomics}, volume = {55}, number = {}, pages = {101529}, doi = {10.1016/j.cbd.2025.101529}, pmid = {40347566}, issn = {1878-0407}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Ursidae/microbiology/metabolism ; *Feces/microbiology/chemistry ; *Metabolome ; Animal Feed/analysis ; }, abstract = {The influences of different bamboo species on the microbiome and metabolome of giant pandas (Ailuropoda melanoleuca) remain understudied. The aim of this study was to investigate the effects of different Phyllostachys species on the gut microbial communities and fecal metabolite profiles in giant pandas. Metagenome and metabolome were performed on the feces of giant pandas fed with different Phyllostachys species (P. edulis, P. iridescens, P. glauca, and P. violascens). The results of metagenome showed that dietary with P. glauca could notably decrease the microbial Shannon index. The relative abundances of both Cellulosilyticum and Pseudomonas were enhanced after dietary with P. iridescens, suggesting P. iridescens could enhance the cellulose-degrading function in giant pandas. However, dietary with P. glauca or P. violascens could increase the relative abundances of certain pathogenic bacteria (Escherichia, Shigella, and Klebsiella). Metabolomics analysis further revealed that all experimental groups exhibited notably elevated levels of fecal flavonoids and fatty acids. In addition, the correlation analysis showed that certain nutrients of bamboo leaves (mainly crude protein and Cu) were significantly correlated with several differential gut bacteria and fecal metabolites. Based on the present results, P. iridescens might be a substitute for the routinely used Phyllostachys species (P. edulis) in the captive management of giant pandas. The results have revealed that bamboo species is an important factor affecting the gut microbiota and fecal metabolites in giant pandas. Our results could provide important information about bamboo species-induced alterations on the microbiome and metabolome in giant pandas.}, }
@article {pmid40346812, year = {2025}, author = {Pryor, JC and Nieva, C and Talley, NJ and Eslick, GD and Duncanson, K and Burns, GL and Hoedt, EC and Keely, S}, title = {Microbial-derived peptidases are altered in celiac disease, non-celiac gluten sensitivity, and functional dyspepsia: a systematic review and re-analysis of the duodenal microbiome.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2500063}, pmid = {40346812}, issn = {1949-0984}, mesh = {Humans ; *Bacteria/enzymology/genetics/classification/isolation &amp; purification ; *Celiac Disease/microbiology/enzymology ; *Duodenum/microbiology ; *Dyspepsia/microbiology ; *Gastrointestinal Microbiome ; *Glutens/metabolism ; *Peptide Hydrolases/metabolism/genetics ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Dietary gluten triggers symptoms in patients with gluten-related disorders (GRDs) including celiac disease (CeD), non-celiac gluten sensitivity (NCGS), and subsets of patients with functional dyspepsia (FD). The gastrointestinal microbiota is altered in these patients when compared to healthy individuals. As the microbiota is crucial for the hydrolysis of gluten, we hypothesized that the capacity of the microbiota to digest gluten is reduced in these conditions. We systematically reviewed and re-analyzed published datasets to compare gastrointestinal microbiomes of GRD patients and identify signals explaining gluten responses. A systematic search of five databases was conducted to identify studies where the microbiota of CeD, NCGS, or FD patients was analyzed by 16S rRNA amplicon or shotgun metagenomic sequencing and compared to control populations. Where available, raw duodenal microbiota sequence data were re-analyzed with a consistent bioinformatic pipeline. Thirty articles met the inclusion criteria for this systematic review. Microbiota diversity metrics were not impacted by the diseases; however, genera including Streptococcus, Neisseria, and Lactobacillus were commonly altered in GRD patients. Re-analysis of duodenal 16S rRNA data was possible for five included articles but did not identify any consistent differentially abundant taxa. Predicted functional analysis of the microbiome revealed that peptidases including aminopeptidase, proline iminopeptidase, and Xaa-Pro dipeptidase are altered in CeD, NCGS, and FD, respectively. These microbial-derived peptidases hydrolyze bonds in proline-rich gluten peptides. While the gastrointestinal microbiota in patients with GRDs differ from controls, no distinct phenotype links them. However, alterations to the predicted functional capacity of the microbiome to produce gluten-hydrolyzing enzymes suggest that inappropriate digestion of gluten by the microbiome impacts host responses to dietary gluten in these conditions. These findings have implications for therapeutic management of GRDs, as treatment with gluten-degrading enzymes or tailored probiotics could improve disease outcomes by enhancing gluten digestion into non-reactive peptides.}, }
@article {pmid40346542, year = {2025}, author = {Gao, H and Xu, L and Liu, Y and Wang, X and Zhu, S and Lin, H and Gao, Y and Mao, D and Lu, X and Luo, Y}, title = {Whole genome comparisons reveal gut-to-lung translocation of Escherichia coli and Burkholderia cenocepacia in two cases of ventilator-associated pneumonia in ICU patients.}, journal = {Respiratory research}, volume = {26}, number = {1}, pages = {178}, pmid = {40346542}, issn = {1465-993X}, support = {2022BKY015//the Tianjin Graduate Research and Innovation Projects/ ; 42377426//the National Natural Science Foundation of China/ ; 18ZXDBSY00100//the Tianjin Science and Technology Plan Project/ ; 21JCYBJC01200//the Tianjin Municipal Natural Science Foundation/ ; 2023220//the Research Project on Integrated Traditional Chinese and Western Medicine of Tianjin Municipal Health Commission/ ; 2020YFC1806904//the National Key R&amp;D Program of China/ ; 41831287//the Key Projects of the National Natural Science Foundation of China/ ; }, mesh = {Aged ; Animals ; Female ; Humans ; Male ; Mice ; Middle Aged ; *Bacterial Translocation/physiology/genetics ; *Burkholderia cenocepacia/genetics/isolation &amp; purification/pathogenicity ; *Escherichia coli/genetics/isolation &amp; purification/pathogenicity ; *Gastrointestinal Microbiome/genetics ; *Genome, Bacterial ; Intensive Care Units/trends ; *Lung/microbiology ; Mice, Inbred C57BL ; *Pneumonia, Ventilator-Associated/microbiology/diagnosis/genetics ; Whole Genome Sequencing/methods ; Case-Control Studies ; Adult ; Aged, 80 and over ; }, abstract = {BACKGROUND: Identifying the sources of pathogenic bacteria causing ventilator-associated pneumonia (VAP) in intensive care unit (ICU) patients is crucial for developing effective prevention and treatment strategies. However, the scarcity of reported cases with confirmed sources limits the ability to evaluate and manage VAP, which remains a major challenge for healthcare systems globally.<br><br>METHODS: Pathogens were isolated from endotracheal aspirate (ETA) samples of VAP patients using conventional culture techniques. Whole-genome comparisons, based on average nucleotide identity (ANI), were performed to identify genetically identical strains by comparing pulmonary isolate genomes with gut metagenome-derived bacterial genomes. Mouse models of pneumonia and colitis were used to validate the translocation of pathogenic bacteria from the gut to the lungs. Metagenomic analysis was performed to characterize the gut microbiome and resistome.<br><br>RESULTS: Pathogenic isolates were obtained from the ETA samples of seven VAP patients, with one isolate per sample. Among these, Escherichia coli (Ec1) and Burkholderia cenocepacia (Bc1) from two patients were genetically identical to strains in their respective gut microbiota, with ANI values above 99%, indicating gut-to-lung translocation. The Ec1 strain demonstrated increased resistance to cefazolin while remaining susceptible to gentamicin, amikacin, and kanamycin, compared to previously reported pneumonia-associated E. coli strains. The Bc1 strain showed elevated resistance to macrolides, chloramphenicols, and tetracyclines relative to pneumonia-associated B. cenocepacia strains. Metagenomic analysis revealed a highly individualized gut microbiota composition among VAP patients. Notably, the translocated bacteria were not dominant within their gut microbiota. Additionally, these patients showed a marked increase in the total abundance of antibiotic resistance genes (ARGs) in their gut microbiota. The translocation ability of the Ec1 strain was validated in a mouse pneumonia model, where it caused more severe lung damage. Furthermore, elevated levels of Escherichia-Shigella were detected in the lung tissues of colitis mice, suggesting that gut-to-lung bacterial translocation may occur in a severely inflamed host, potentially leading to pneumonia.<br><br>CONCLUSIONS: This study demonstrates the gut-to-lung translocation of E. coli and B. cenocepacia, highlighting their role in the development and progression of VAP in ICU patients. These findings provide valuable insights for implementing targeted prevention and treatment strategies for VAP in ICU settings.}, }
@article {pmid40344797, year = {2025}, author = {Chen, Y and Liu, Q and Xu, XW}, title = {Spatio-temporal variability of nitrogen-cycling potentials in particle-attached and free-living microbial communities in the Yangtze River estuary and adjacent regions.}, journal = {Marine pollution bulletin}, volume = {217}, number = {}, pages = {118121}, doi = {10.1016/j.marpolbul.2025.118121}, pmid = {40344797}, issn = {1879-3363}, mesh = {*Estuaries ; Rivers/microbiology ; China ; *Nitrogen Cycle ; *Microbiota ; Nitrogen ; Seawater/microbiology ; Spatio-Temporal Analysis ; Bacteria/metabolism ; Environmental Monitoring ; Salinity ; Denitrification ; }, abstract = {Particle-attached (PA) and free-living (FL) microorganisms regulate coastal biogeochemical cycles, yet their roles in nitrogen transformation remain unclear. To address this knowledge gap, we seasonally sampled PA and FL from seawater along salinity gradients in the Yangtze River estuary (YRE) and adjacent regions to investigate the spatio-temporal variability of microbial communities, abundances of nitrogen-cycling genes, and key microbial groups affiliated with the nitrogen cycle in PA and FL. Compared to FL, the composition, structure and diversity of PA exhibited more pronounced variations in response to salinity and [NO3[-]]. Metagenomic analyses indicated a predominant role of denitrification in both PA and FL, with greater abundances of genes involved in most nitrogen transformation processes observed in the estuarine region. The potential for the nitrogen cycle in PA was relatively lower in May, while greater in FL, potentially due to competition for nitrogen substrates between PA and phytoplankton during spring. PERMANOVA and Mantel tests showed that gene abundances exhibited spatio-temporal dynamics and were associated with species and environmental factors. Gene-affiliated taxa identification and the Weighted Correlation Network Analysis revealed that the differences in environmental factors and taxa responsible for the nitrogen transformation drove spatio-temporal variations of the nitrogen cycle between PA and FL, and implied the significance of their interaction in nitrogen fates in coastal ecosystem. Gammaproteobacteria and Betaproteobacteria were highly affiliated with nitrogen-cycling genes, while Nitrososphaeria played an important role in nitrification and denitrification. This study offered practical insights for mitigating eutrophication through targeted regulation of microbial-mediated nitrogen fluxes.}, }
@article {pmid40343328, year = {2025}, author = {McLamb, F and Vazquez, A and Olander, N and Vasquez, MF and Feng, Z and Malhotra, N and Bozinovic, L and Najera Ruiz, K and O'Connell, K and Stagg, J and Bozinovic, G}, title = {Comparative Three-Barcode Phylogenetics and Soil Microbiomes of Planted and Wild Arbutus Strawberry Trees.}, journal = {Plant direct}, volume = {9}, number = {5}, pages = {e70078}, pmid = {40343328}, issn = {2475-4455}, abstract = {Taxonomic identification of closely related plants can be challenging due to convergent evolution, hybridization, and overlapping geographic distribution. To derive taxonomic relationships among planted and wild Arbutus plants across a large geographic range, we complemented three standard plastid barcodes rbcL, matK, and trnH-psbA with soil and fruit chemistry, soil microbiome, and plant morphology analyses. Soil and plant sampling included planted Arbutus from manicured sites in Southern California, USA, wild plants from Southern and Northern California, and wild populations from Mediterranean island of Hvar, Croatia. We hypothesized that phenotypic variation within and between sites correlates with plants' genotype and geographic distribution. Similar fruit chemistry corresponds to geographical proximity and morphological resemblance, while bulk soil bacterial content defines three distinct clusters distinguishing planted versus wild trees and continent of origin. The soil microbiome of wild California Arbutus was characterized by an abundance of Nitrobacter, while the presence of Candidatus Xiphinematobacter was high in wild Hvar samples and most planted samples, but low in all wild California samples. Although all three barcodes resolved four main groups, the position of samples varies across barcodes. The rbcL phylogram is relatively unbalanced, suggesting slower diversification among wild California populations and exhibiting greater resolution than other barcodes among planted individuals. While our data demonstrate an overall agreement among standard plant barcodes relative to geo-distribution and plant morphology, sustained efforts on cost-effective global plant DNA barcode library standardization for closely related and geographically overlapping plants is recommended.}, }
@article {pmid40341642, year = {2025}, author = {Humińska-Lisowska, K and Michałowska-Sawczyn, M and Kosciolek, T and Łabaj, PP and Kochanowicz, A and Mieszkowski, J and Proia, P and Cięszczyk, P and Zielińska, K}, title = {Gut microbiome and blood biomarkers reveal differential responses to aerobic and anaerobic exercise in collegiate men of diverse training backgrounds.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {16061}, pmid = {40341642}, issn = {2045-2322}, support = {2018/29/N/NZ7/02800//Narodowe Centrum Nauki/ ; 2018/29/N/NZ7/02800//Narodowe Centrum Nauki/ ; }, mesh = {Humans ; Male ; *Gastrointestinal Microbiome/physiology ; *Biomarkers/blood ; *Exercise/physiology ; Young Adult ; Feces/microbiology ; Exercise Test ; Athletes ; Anaerobiosis ; Adult ; }, abstract = {The gut microbiome influences physiological responses to exercise by modulating inflammatory markers and metabolite production. Athletes typically exhibit greater microbial diversity, which may be associated with improved performance, but the mechanisms linking different exercise modalities to the gut microbiome are not fully understood. In this study, blood and stool samples were collected from endurance athletes, strength athletes, and non-athletic controls performing two maximal exercise tests (the anaerobic Wingate test and the aerobic Bruce Treadmill Test) to integrate serum biomarker data with gut bacterial metagenomic profiles. While most biochemical markers showed similar post-exercise trends across groups, SPARC (secreted protein acidic and rich in cysteine) and adiponectin levels showed modality-specific responses. Strength-trained participants showed unique microbiome-biomarker associations after the Wingate test. In addition, baseline enrichment of certain bacterial taxa, including Clostridium phoceensis and Catenibacterium spp., correlated with reduced Bruce Treadmill test response in strength-trained individuals. These findings, while requiring further validation, indicate the complex interplay between exercise type, training background, and the gut microbiome, and suggest that specific microbial species may help shape recovery and adaptation.}, }
@article {pmid40340756, year = {2025}, author = {Laue, HE and Willis, AD and Wang, F and MacDougall, MC and Xu, Y and Karagas, MR and Madan, JC and Fleisch, AF and Lanphear, BP and Cecil, KM and Yolton, K and Chen, A and Buckley, JP and Braun, JM}, title = {Early-life and concurrent predictors of the healthy adolescent microbiome in a cohort study.}, journal = {Genome medicine}, volume = {17}, number = {1}, pages = {50}, pmid = {40340756}, issn = {1756-994X}, support = {K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; K99/R00ES034086 , P01ES011261, R01ES0272244, R01ES025214//National Institute of Environmental Health Sciences,United States/ ; R35GM133420/GM/NIGMS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; UL1TR001425/TR/NCATS NIH HHS/United States ; }, mesh = {Humans ; Adolescent ; Female ; Male ; Child ; *Gastrointestinal Microbiome ; Feces/microbiology ; Cohort Studies ; Metagenomics/methods ; }, abstract = {BACKGROUND: The microbiome of adolescents is poorly understood, as are factors influencing its composition. We aimed to describe the healthy adolescent microbiome and identify early-life and concurrent predictors of its composition.<br><br>METHODS: We performed metagenomic sequencing of 247 fecal specimens from 167 adolescents aged 11-14&#xa0;years participating in the Health Outcomes and Measures of the Environment (HOME) Study, a longitudinal pregnancy and birth cohort (Cincinnati, OH). We described common features of the adolescent gut microbiome and applied self-organizing maps (SOMs)-a machine-learning approach-to identify distinct microbial profiles (n&#x2009;=&#x2009;4). Using prospectively collected data on sociodemographic characteristics, lifestyle, diet, and sexual maturation, we identified early-life and concurrent factors associated with microbial diversity and phylum relative abundance with linear regression models and composition with Kruskal-Wallis and Fisher's exact tests.<br><br>RESULTS: We found that household income and other sociodemographic factors were consistent predictors of the microbiome, with higher income associated with lower diversity and differential relative abundances of Firmicutes (increased) and Actinobacteria (decreased). Sexual maturation, distinct from chronological age, was related to higher diversity in females and differences in phylum relative abundances and compositional profiles in both males and females.<br><br>CONCLUSIONS: Our study suggests that adolescence is a unique window for gut microbial composition and that it may be shaped by both early-life and concurrent exposures, highlighting its potential in future epidemiologic research.}, }
@article {pmid40340623, year = {2025}, author = {Deng, J and Zhang, J and Su, M and Li, J and Su, Y and Zhong, Q and Hu, J and Chen, Y and Liao, S and Lin, D and Guo, X}, title = {Fusobacterium mortiferum and its metabolite 5-aminovaleric acid promote the development of colorectal cancer in obese individuals through Wnt/β-catenin pathway by DKK2.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2502138}, pmid = {40340623}, issn = {1949-0984}, mesh = {*Colorectal Neoplasms/metabolism/microbiology/genetics/pathology ; Animals ; Humans ; Mice ; Gastrointestinal Microbiome ; *Fusobacterium/metabolism ; *Wnt Signaling Pathway/drug effects ; *Obesity/microbiology/metabolism/complications ; *Intercellular Signaling Peptides and Proteins/metabolism/genetics ; Male ; Female ; Cell Line, Tumor ; Cell Proliferation ; Mice, Inbred C57BL ; }, abstract = {Colorectal cancer (CRC) is one of the most prevalent cancers worldwide, with high incidence and mortality rates. An increasing body of research suggests that obesity is a significant risk factor for the development of CRC. Moreover, recent findings have highlighted the close association between the gut microbiota and both obesity and CRC. Despite this, the specific mechanisms by which the gut microbiota influences obesity and CRC remain unclear. This study aims to explore the role of the gut bacterium Fusobacterium mortiferum and its metabolite 5-aminovaleric acid (5-AVA) in the development of obesity and CRC. Our study found that the metabolite 5-aminovaleric acid produced by Fusobacterium mortiferum significantly inhibits the expression of the tumor suppressor DKK2. This inhibition leads to enhanced proliferation of CRC cells. Furthermore, we discovered that Fusobacterium mortiferum and 5-AVA can activate the Wnt/β-catenin signaling pathway by inhibiting DKK2, thereby promoting tumor growth. This finding was validated in CRC mouse models and in vitro experiments. Additional mechanistic studies revealed that 5-AVA interacts with the demethylase KDM6B, affecting the demethylation process of DKK2 and subsequently activating the Wnt/β-catenin signaling pathway. Our study retrospectively collected fecal samples from patients who underwent gastrointestinal endoscopy at the Sixth Affiliated Hospital of Sun Yat-sen University over the past five years. Participants were stratified into a healthy control group and an adenoma group based on the outcomes of their colonoscopies. Following this, we conducted metagenomic analysis to identify differential bacteria, and based on the results, we performed bacterial cultivation and metabolomic profiling. The roles of the targeted bacteria and their metabolites were further validated through animal models and cellular assays, employing techniques such as Western Blot, qPCR, immunohistochemistry, molecular docking simulations, and gene overexpression studies. This study uncovers the potential carcinogenic effects of Fusobacterium mortiferum and 5-AVA in the development of obesity and CRC. Our research emphasizes the complex interplay between the gut microbiota and host metabolism and suggests new directions for future research to explore how modulation of the gut microbiota could prevent and treat CRC.}, }
@article {pmid40339893, year = {2025}, author = {Zhang, L and Wang, S and Jia, Y and Liu, Z and Yao, J and Chen, Y}, title = {Alterations in microbial communities and antibiotic resistance genes pre- and post-sludge bulking in a wastewater treatment plant.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {376}, number = {}, pages = {126391}, doi = {10.1016/j.envpol.2025.126391}, pmid = {40339893}, issn = {1873-6424}, mesh = {*Waste Disposal, Fluid/methods ; *Wastewater/microbiology ; *Drug Resistance, Microbial/genetics ; *Sewage/microbiology ; RNA, Ribosomal, 16S ; *Microbiota ; Bacteria/genetics ; Genes, Bacterial ; }, abstract = {Sludge bulking is a common issue in wastewater treatment plants (WWTPs) that can disrupt microbial communities and potentially impact the abundance and spread of antibiotic resistance genes (ARGs) within treatment systems. This study employed high-throughput 16S rRNA gene sequencing and metagenomic sequencing to examine the changes in microbial communities and ARGs in a WWTP during non-bulking and bulking periods. The results indicated that bacterial diversity decreased in bulking sludge while maintaining a high removal efficiency of conventional pollutants. Significant differences were detected at the bacterial genus level between non-bulking and bulking sludge (p < 0.05). The proliferation of Candidatus_Microthrix contributed to sludge bulking, while Micropruina improved sludge settleability. When treating wastewater with the same water quality and quantity, anaerobic/anoxic/oxic (A[2]/O) exhibited the highest resistance to sludge bulking, followed by Bardenpho and the Carrousel oxidation ditch. The abundance of ARGs in bulking sludge (28.15-43.63 ppm) was lower than that in non-bulking sludge (51.72-59.01 ppm). The ARGs removal efficiency reached 96.24 % and 94.34 % during bulking and non-bulking periods, respectively. Network analysis revealed that Candidatus_Microthrix was positively correlated with aadS and tetX, and norank_f_Saprospiraceae exhibited positive correlations with vanRO and ANT(3″)-Iia. These findings provide valuable insights into the impacts of sludge bulking on WWTP performance and ARGs dynamics, informing evidence-based policies for sustainable wastewater treatment.}, }
@article {pmid40338610, year = {2025}, author = {Gan, X and Yu, Q and Hu, X and Qian, Y and Mu, X and Li, H}, title = {Metagenomic and metatranscriptomic analysis reveals the enzymatic mechanism of plant polysaccharide degradation through gut microbiome in plateau model animal (Ochotona curzoniae).}, journal = {FEMS microbiology letters}, volume = {372}, number = {}, pages = {}, doi = {10.1093/femsle/fnaf045}, pmid = {40338610}, issn = {1574-6968}, support = {32471575//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Polysaccharides/metabolism ; *Gastrointestinal Microbiome/genetics ; Metagenomics ; *Lagomorpha/microbiology/metabolism ; *Bacteria/genetics/classification/metabolism/enzymology/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Glycoside Hydrolases/genetics/metabolism ; Transcriptome ; Poaceae/metabolism ; Altitude ; Gene Expression Profiling ; Cellulase/genetics/metabolism ; }, abstract = {Herbivorous animals can obtain energy by decomposing plant polysaccharides through gut microbiota, but the mechanism of gut microbiota decomposing plant polysaccharides in high-altitude model animals is still unclear. Plateau pika (Ochotona curzoniae) is a key model animal native to the Qinghai-Tibet Plateau with a high intake of grass. Thus, Plateau pika is an excellent animal model for studying how herbivorous animals digest and metabolize grass polysaccharides. Here, we used 16S rDNA, 16S rRNA, metagenomic, and metatranscriptomic sequencing to characterize gut microbial composition, gene potential, and expressed function in pikas from different altitudes. Unlike total bacteria, Oscillospira and Ruminococcus were main active bacterial genera in pika's gut. The metabolic pathways of cellulose and hemicellulose were up-regulated in the middle and high-altitude groups; those genes encoding polysaccharide enzymes were enriched. Notably, the proportion of lignin metabolic genes expressed in pika's gut was the highest, followed by cellulase and hemicellulase genes. According to comparative metagenomics of different animals, the number and relative abundance of cellulase and hemicellulase genes in pika's gut were at a higher level compared with steer, etc. These results indicated that plateau pika obtained sufficient energy from grass-based diet by increasing the expression of related metabolic enzymes.}, }
@article {pmid40338094, year = {2025}, author = {Tanaka, M and Toyonaga, T and Nakagawa, F and Iwamoto, T and Hasegawa, Y and Komatsu, A and Sumiyoshi, N and Shibuya, N and Minemura, A and Ariyoshi, T and Matsumoto, A and Oka, K and Shimoda, M and Saruta, M}, title = {Dietary 3-aminobenzoic acid enhances intestinal barrier integrity and attenuates experimental colitis.}, journal = {American journal of physiology. Gastrointestinal and liver physiology}, volume = {328}, number = {6}, pages = {G801-G810}, doi = {10.1152/ajpgi.00406.2024}, pmid = {40338094}, issn = {1522-1547}, support = {21K15985//Kaken Pharmaceutical (Kaken)/ ; }, mesh = {Humans ; Animals ; Caco-2 Cells ; *Intestinal Mucosa/metabolism/drug effects ; Mice ; Gastrointestinal Microbiome/drug effects ; Permeability/drug effects ; Male ; *Colitis, Ulcerative/metabolism/drug therapy ; Mice, Inbred C57BL ; Female ; *Colitis/metabolism ; Disease Models, Animal ; Colon/metabolism/drug effects/pathology ; }, abstract = {Disruption of intestinal epithelial integrity and increased permeability is central to the pathogenesis of ulcerative colitis (UC). In this study, we identified 3-aminobenzoic acid (3-ABA), a dietary component abundant in azuki beans, soybeans, and chickpeas as a regulator of epithelial permeability and inflammation in the colon. Screening 119 gut microbial metabolites revealed the ability of 4-ABA, a structural isomer of 3-ABA, to enhance barrier function in Caco2 cells. Further analysis of structural isomers identified 3-ABA as the most effective, significantly increasing transepithelial electrical resistance and reducing epithelial permeability. Using liquid chromatography-mass spectrometry, 3-ABA was detected in dietary beans and human fecal samples. Fecal 3-ABA levels were significantly lower in patients with UC compared with healthy individuals. Metagenomic and functional prediction analyses revealed dysbiosis in patients with UC, characterized by an enrichment of bacterial genes involved in ABA degradation. Gene expression analysis of 3-ABA-stimulated Caco2 cells demonstrated upregulation of tight junction molecules, such as CLDN1 and TJP1, enhancing epithelial barrier integrity. In a dextran sodium sulfate-induced colitis mouse model, rectal 3-ABA administration ameliorated colitis by enhancing epithelial barrier function and reducing inflammation. These findings highlight 3-ABA's potential as a dietary therapeutic agent for UC, offering a novel strategy to enhance intestinal integrity and mitigate inflammation.NEW &amp; NOTEWORTHY Increased intestinal epithelial permeability is central to the pathogenesis of ulcerative colitis (UC). 3-Aminobenzoic acid (3-ABA), a dietary component abundant in beans, decreased epithelial permeability and attenuated colonic inflammation in a mouse experimental colitis model. Reduced fecal 3-ABA levels in patients with UC were associated with dysbiosis-driven accelerated degradation. These findings highlight the therapeutic potential of 3-ABA in UC by targeting colonic epithelium.}, }
@article {pmid40335921, year = {2025}, author = {Jia, S and Mi, H and Su, Y and Liu, Y and Ming, Z and Lin, J}, title = {Changes of intestinal microbiome and its relationship with painful diabetic neuropathy in rats.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {281}, pmid = {40335921}, issn = {1471-2180}, support = {22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; 22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; 22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; 22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; 22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; 22SXQT0125//Bureau of Science and Technology Nanchong Municipality/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; CBY22-ZDA09//School-level Key Scientific Research Project of North Sichuan Medical College/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Diabetic Neuropathies/microbiology/pathology ; Rats ; Male ; Rats, Sprague-Dawley ; Diabetes Mellitus, Experimental/microbiology/complications ; Interleukin-1beta/metabolism ; Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Tumor Necrosis Factor-alpha/metabolism ; Diabetes Mellitus, Type 2/microbiology/complications ; Colon/pathology/microbiology ; Spinal Cord/pathology/metabolism ; }, abstract = {OBJECTIVE: To analyze the gut bacterial microbiome in rats with painful diabetic neuropathy (PDN) compared to normal rats.<br><br>METHODS: Type 2 diabetes was induced in rats via a high-fat and high-sugar diet combined with a low dose of streptozotocin. Glucose metabolism and insulin sensitivity were evaluated using intraperitoneal glucose tolerance tests and insulin tolerance tests. The progression of peripheral neuropathy was assessed using the mechanical withdrawal threshold and thermal withdrawal latency. Histopathological analysis of rat colon tissues was performed using hematoxylin-eosin staining to observe morphological changes. The expression levels of pro-inflammatory cytokines TNF-&#x3b1; and IL-1&#x3b2; in spinal cord tissues were measured using enzyme-linked immunosorbent assay (ELISA). Fecal samples were then collected for metagenomic sequencing and analysis.<br><br>RESULT: Behavioral tests revealed reduced mechanical withdrawal threshold and thermal withdrawal latency in PDN rats. Histological analysis showed significant colonic mucosal damage and inflammatory cell infiltration, suggesting impaired intestinal barrier function. Elevated TNF-&#x3b1; and IL-1&#x3b2; levels in spinal cord tissues further highlight peripheral inflammation's role in PDN. Sequencing analysis revealed significant differences in gut microbiota composition between PDN and control rats, with altered Bacillota/Bacteroidota ratios and increased Lactobacillus abundance. Functional annotation analysis, based on the KEGG, EggNOG, and CAZy databases, indicated significant enrichment of metabolic pathways related to carbohydrate and amino acid metabolism, energy metabolism, and cell structure biogenesis in PDN rats. Cluster analysis identified higher functional clustering in Metabolism and Genetic Information Processing pathways in PDN rats.<br><br>CONCLUSION: This study demonstrates that PDN leads to altered gut microbiota composition, disrupted metabolic pathways, and increased inflammation, contributing to the pathological progression of diabetic neuropathy. This study provides new insights into the interplay between gut microbiota and diabetic neuropathy, offering potential avenues for therapeutic interventions targeting microbiome and metabolism.}, }
@article {pmid40335750, year = {2025}, author = {Deepali, D and Tejoprakash, N and Sudhakara Reddy, M}, title = {Diversity of Bacterial Communities in Seleniferous Soils and Their Impact on Plant Growth and Selenium Toxicity.}, journal = {Current microbiology}, volume = {82}, number = {6}, pages = {285}, pmid = {40335750}, issn = {1432-0991}, mesh = {*Selenium/toxicity/metabolism ; *Soil Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism/drug effects ; *Soil/chemistry ; *Zea mays/growth &amp; development/microbiology/drug effects ; Biodiversity ; *Microbiota ; Plant Roots/microbiology/growth &amp; development ; *Soil Pollutants/toxicity ; Phylogeny ; }, abstract = {The present study aimed to investigate the diversity of bacterial communities in seleniferous soils using Illumina Mi-Seq Next-Generation Sequencing. This study also compared seleniferous soils (SE) with non-seleniferous (NS) soils to evaluate Selenium (Se) impact on microbial communities and soil properties. Metagenomic analysis identified Proteobacteria as the predominant phylum in both environments, with SE soils exhibiting a higher dominance (48%) than NS soils (31%). The most dominant operational taxonomic unit (OTU) across both soil types belonged to the genus Bacillus. Se altered microbial community composition, increasing the abundance of the Bacillaceae family (30%) and Pseudomonadaceae family (25%) compared to NS soil. Bacillus was the dominant genus in the SE environment indicating its tolerance to selenium. Diversity indices indicated that control soils had higher species richness, while SE soils exhibited a more stressed microbial structure. A consortium of bacterial isolates (Proteus terrae Se3, Halopseudomonas formosensis Se5, and Corynebacterium glutamicum Se38) was inoculated in maize plants cultivated in natural seleniferous soils. Plants inoculated with bacterial consortium grew more healthy and had greater biomass in their roots, shoots, and seeds. Bacterial inoculation results in lesser selenium accumulation in the roots, shoots and seeds of maize plants compared to non-inoculated plants. These results suggest that bacterial species from seleniferous soils may be employed as biofertilizers to enhance plant growth and help plants tolerate Se toxicity in seleniferous soils.}, }
@article {pmid40335510, year = {2025}, author = {Zhi, J and Liang, Y and Zhao, W and Qiao, J and Zheng, Y and Peng, X and Li, L and Wei, X and Wang, W}, title = {Oral microbiome-derived biomarkers for non-invasive diagnosis of head and neck squamous cell carcinoma.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {74}, pmid = {40335510}, issn = {2055-5008}, support = {82403470//National Natural Science Foundation of China/ ; 82401333//National Natural Science Foundation of China/ ; 21JCYBJC01570//Tianjin Municipal Science and Technology Committee/ ; 24JCQNJC01170//Tianjin Municipal Science and Technology Project/ ; TJWJ2023XK013//Tianjin Municipal Health Commission/ ; TJYXZDXK-046A//Tianjin Municipal Health Commission/ ; }, mesh = {Humans ; RNA, Ribosomal, 16S/genetics ; *Squamous Cell Carcinoma of Head and Neck/diagnosis/microbiology ; *Microbiota ; Male ; Cross-Sectional Studies ; Middle Aged ; Female ; *Head and Neck Neoplasms/diagnosis/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Aged ; Metagenomics ; Dysbiosis/microbiology ; *Mouth/microbiology ; Adult ; Biomarkers/analysis ; DNA, Bacterial/genetics ; Sequence Analysis, DNA ; Machine Learning ; Biomarkers, Tumor ; }, abstract = {Mounting evidence suggests that sustained microbial dysbiosis is associated with the development of multiple cancers, while the species-level bacterial taxa and metabolic dysfunction of oral microbiome in patients with head and neck squamous cell carcinoma (HNSCC) remains unclear. In this cross-sectional study, comprehensive metagenomic and 16S rRNA amplicon sequencing analyses of oral swab samples from 172 patients were performed. Unsupervised clustering algorithms of relative microbial abundance profiles revealed three distinctive microbiome clusters. Based on the metagenomic and 16S rRNA amplicon sequencing data, machine learning-based methods were used to construct the HNSCC diagnostic classifier, which exhibited high area under the curve values of 0.78-0.89. Our study provided the first exhaustive metagenomic and 16S rRNA amplicon sequencing analyses to date, revealing that microbial-metabolic dysbiosis is a potential risk factor for HNSCC progression and therefore providing a robust theoretical basis for potential diagnostic and therapeutic strategies for HNSCC patients.}, }
@article {pmid40335465, year = {2025}, author = {Romano, S and Wirbel, J and Ansorge, R and Schudoma, C and Ducarmon, QR and Narbad, A and Zeller, G}, title = {Machine learning-based meta-analysis reveals gut microbiome alterations associated with Parkinson's disease.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4227}, pmid = {40335465}, issn = {2041-1723}, support = {BB/R012490/1//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; BBS/E/F/000PR10356//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; SEG 9093//European Molecular Biology Organization (EMBO)/ ; EMBO ALTF 1030-2022//European Molecular Biology Organization (EMBO)/ ; 395357507 - SFB 1371//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; }, mesh = {*Parkinson Disease/microbiology/diagnosis ; *Gastrointestinal Microbiome/genetics ; Humans ; *Machine Learning ; Metagenome ; }, abstract = {There is strong interest in using the gut microbiome for Parkinson's disease (PD) diagnosis and treatment. However, a consensus on PD-associated microbiome features and a multi-study assessment of their diagnostic value is lacking. Here, we present a machine learning meta-analysis of PD microbiome studies of unprecedented scale (4489 samples). Within most studies, microbiome-based machine learning models accurately classify PD patients (average AUC 71.9%). However, these models are study-specific and do not generalise well across other studies (average AUC 61%). Training models on multiple datasets improves their generalizability (average LOSO AUC 68%) and disease specificity as assessed against microbiomes from other neurodegenerative diseases. Moreover, meta-analysis of shotgun metagenomes delineates PD-associated microbial pathways potentially contributing to gut health deterioration and favouring the translocation of pathogenic molecules along the gut-brain axis. Strikingly, microbial pathways for solvent and pesticide biotransformation are enriched in PD. These results align with epidemiological evidence that exposure to these molecules increases PD risk and raise the question of whether gut microbes modulate their toxicity. Here, we offer the most comprehensive overview to date about the PD gut microbiome and provide future reference for its diagnostic and functional potential.}, }
@article {pmid40335388, year = {2025}, author = {Dwivedi, SL and Vetukuri, RR and Kelbessa, BG and Gepts, P and Heslop-Harrison, P and Araujo, ASF and Sharma, S and Ortiz, R}, title = {Exploitation of rhizosphere microbiome biodiversity in plant breeding.}, journal = {Trends in plant science}, volume = {}, number = {}, pages = {}, doi = {10.1016/j.tplants.2025.04.004}, pmid = {40335388}, issn = {1878-4372}, abstract = {Climate change-induced stresses are perceived by plants at the root-soil interface, where they are alleviated through interactions between the host plant and the rhizosphere microbiome. The recruitment of specific microbiomes helps mitigate stress, increases resistance to pathogens, and promotes plant growth, development, and reproduction. The structure of the rhizosphere microbiome is shaped by crop domestication and variations in ploidy levels. Here we list key genes that regulate rhizosphere microbiomes and host genetic traits. We also discuss the prospects for rigorous analysis of symbiotic interactions, research needs, and strategies for systematically utilizing microbe-crop interactions to improve crop performance. Finally, we highlight challenges of maintaining live rhizosphere microbiome collections and mining heritable variability to enhance interactions between host plants and their rhizosphere microbiomes.}, }
@article {pmid40334798, year = {2025}, author = {Zhu, X and Chen, L and Yang, P and Luo, S and Teng, M and Zhu, W and Li, Y and Zhao, D and Wang, N and Chen, X and Cheng, M and Tu, H and Huang, W and Yang, F and Wang, L and Liu, X and Ning, K}, title = {Microbiome catalog and dynamics of the Chinese liquor fermentation process.}, journal = {Bioresource technology}, volume = {431}, number = {}, pages = {132620}, doi = {10.1016/j.biortech.2025.132620}, pmid = {40334798}, issn = {1873-2976}, mesh = {*Fermentation ; *Microbiota/genetics ; *Alcoholic Beverages/microbiology ; Multigene Family ; China ; Bacillus licheniformis/genetics/metabolism ; }, abstract = {Fermented food remains poorly understood, largely due to the lack of knowledge about microbes in food fermentation. Here, this study constructed Moutai Fermented Grain Catalog (MTFGC), a representative liquor fermented by one of the most complex fermentations. MTFGC comprised 8,379,551 non-redundant genes and 5,159 metagenome-assembled genomes, with 20% species and 20% genes being novel. Additionally, 25,625 biosynthetic gene clusters (BGCs) and 28 BGC-enriched species were identified. Moreover, the microbial community assembly was deterministic, with significant species and gene changes in early fermentation stages, while stabilizing in later stages. Further BGC-knockout experiments verified Bacillus licheniformis, a BGC-enriched species, employed its BGCs for synthesizing the aroma-related lipopeptide lichenysin. This study has established the largest genetic resource for fermented food, uncovering its uniqueness and high metabolic potential. These findings facilitate the transition potential from traditional fermentation to precision-driven synthetic biology in food systems.}, }
@article {pmid40333159, year = {2025}, author = {Gao, Y and Lou, Y and Hui, Y and Chen, H and Sang, H and Liu, F}, title = {Characterization of the Gut Microbiota in Patients with Psoriasis: A Systematic Review.}, journal = {Pathogens (Basel, Switzerland)}, volume = {14}, number = {4}, pages = {}, pmid = {40333159}, issn = {2076-0817}, support = {22LCYY-QH10//Jinling Hospital/ ; }, mesh = {Humans ; *Dysbiosis/microbiology/therapy ; Fecal Microbiota Transplantation ; *Gastrointestinal Microbiome ; Probiotics/administration &amp; dosage ; *Psoriasis/microbiology/therapy ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Background: Psoriasis is a prevalent and persistent inflammatory disorder with systemic manifestations. Emerging evidence implicates the gut microbiota in regulating inflammatory responses, metabolic pathways, and immune homeostasis. This review synthesizes current evidence on gut microbiota dysbiosis in psoriasis and evaluates the therapeutic potential of probiotics and fecal microbiota transplantation (FMT) in disease management. Method: Following PRISMA guidelines, we systematically reviewed studies investigating gut microbiome profiles in psoriasis through the MEDLINE, EMBASE, and Web of Science databases (January 2015-December 2024). Included studies utilized 16S rRNA gene sequencing or metagenomic analyses for microbial characterization. Results: Comparative analyses revealed distinct gut microbiota patterns in psoriasis patients compared with healthy controls, although specific microbial signatures exhibited inconsistencies across studies. Notably, interventions modulating gut microbiota composition-particularly probiotic supplementation-demonstrated measurable improvements in psoriasis severity scores and inflammatory markers. Conclusions: Gut microbiome modulation represents a promising therapeutic strategy for psoriasis; however, current evidence highlights the need for standardized microbial analysis methodologies and larger longitudinal studies to establish causality. Future research should prioritize the functional characterization of microbiota-host interactions to optimize therapeutic applications.}, }
@article {pmid40333054, year = {2025}, author = {Matos, JSS and Demoliner, M and Gularte, JS and Filippi, M and de Abreu Góes Pereira, VM and da Silva, MS and Weber, MN and de Barros, MP and Spilki, FR}, title = {Virome of Terrestrial Mammals and Bats from Southern Brazil: Circulation of New Putative Members of the Togaviridae Family and Other Findings.}, journal = {Pathogens (Basel, Switzerland)}, volume = {14}, number = {4}, pages = {}, pmid = {40333054}, issn = {2076-0817}, support = {405786/2022-0//CNPQ/ ; }, mesh = {Animals ; Brazil/epidemiology ; *Chiroptera/virology ; *Virome ; *Mammals/virology ; Phylogeny ; Metagenomics ; Humans ; }, abstract = {The surveillance of wildlife viromes is essential for identifying zoonotic threats within the One Health framework. This study analyzed rectal and oral swabs from 88 individuals representing 13 species as felids, wild rodents, marsupials and non-human primates in Southern Brazil using metagenomic sequencing. Akodon montensis (n = 15 individuals) and Coendou spinosus (n = 4) harbored Chikungunya virus (ChikV, Togaviridae), marking its first detection in these hosts. Molossus molossus (n = 17) presented Coronaviridae and Orthoherpesviridae, while Eptesicus furinalis (n = 1) also carried Coronaviridae. A broad virome diversity, including Togaviridae and Adenoviridae members, was identified in Didelphis albiventris (n = 43), with significant relevance to human health. Additional species, such as Callithrix jacchus (n = 1), Leopardus guttulus (n = 1), Myocastor coypus (n = 1), Monodelphis iheringi (n = 1), Thaptomys nigrita (n = 1), Sooretamys angouya (n = 1), Brucepattersonius iheringi (n = 1), and Lasiurus blossevillii (n = 1), contributed to insights into viral reservoirs. These results underscore the importance of virome studies in regions harboring high biodiversity, emphasizing genomic surveillance as a vital tool for monitoring zoonotic viruses and safeguarding global health.}, }
@article {pmid40330019, year = {2025}, author = {Fang, P and Wen, Y and Deng, W and Liang, R and He, P and Wang, C and Fan, N and Huo, K and Zhao, K and Li, C and Bai, Y and Ma, Y and Hu, L and Guan, Y and Yang, S}, title = {Investigation of dynamic microbial migration patterns in the respiratory tract.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1542562}, pmid = {40330019}, issn = {2235-2988}, mesh = {Humans ; *Respiratory Tract Infections/microbiology ; Prospective Studies ; Male ; Female ; Middle Aged ; *Microbiota ; Sputum/microbiology ; Bronchoalveolar Lavage Fluid/microbiology ; Aged ; *Respiratory System/microbiology ; Adult ; High-Throughput Nucleotide Sequencing ; Metagenomics ; Oropharynx/microbiology ; Bayes Theorem ; *Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: The role of the respiratory microbiome in lung diseases is increasingly recognized, with the potential migration of respiratory pathogens being a significant clinical consideration. Despite its importance, evidence elucidating this phenomenon remains scarce.<br><br>METHODS: This prospective study collected clinical samples from patients with suspected lower respiratory tract infections (LRTI), including oropharyngeal swabs (OPS), sputum, and bronchoalveolar lavage fluid (BALF). Metagenomic next-generation sequencing (mNGS) was employed to analyze respiratory microbial diversity, complemented by Bayesian source tracking and sequence alignment analyses to explore pathogen migration patterns.<br><br>RESULTS: A cohort of 68 patients was enrolled, with 56 diagnosed with LRTI and 12 with non-infectious respiratory conditions. A statistically significant disparity in respiratory microbiome diversity was observed between infected and non-infected groups (p < 0.05). Intriguingly, no significant variations in microbial community structure, including alpha and beta diversity, were detected across different respiratory tract sites within individuals. The Bayesian source tracking analysis revealed a pronounced migration pattern among pathogens compared to the overall microbial community, with migration ratios of 51.54% and 1.92%, respectively (p < 0.05). Sequence similarity analysis further corroborated these findings, highlighting a notable homology among specific migrating pathogens.<br><br>CONCLUSION: This study represents a pioneering effort in deducing pathogen migration patterns through microbial source tracking analysis. The findings provide novel insights that could significantly advance clinical diagnostics and therapeutic strategies for respiratory infections.}, }
@article {pmid40329426, year = {2025}, author = {Ren, L and Yang, J and Xiao, Y and Guo, L and Rao, J and Wu, C and Wang, X and Wang, Y and Zhang, L and Zhang, L and Jiang, X and Zhong, J and Zhong, J and Yang, W and Wang, C and Wang, J and Li, M}, title = {Transmission of the human respiratory microbiome and antibiotic resistance genes in healthy populations.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {115}, pmid = {40329426}, issn = {2049-2618}, support = {2020-I2M-2-013//Chinese Academy of Medical Sciences (CAMS) Innovation Fund for Medical Sciences (CIFMS)/ ; 2023-I2M-2-001//Chinese Academy of Medical Sciences (CAMS) Innovation Fund for Medical Sciences (CIFMS)/ ; 2023-I2M-2-001//Chinese Academy of Medical Sciences (CAMS) Innovation Fund for Medical Sciences (CIFMS)/ ; 2019PT310029//Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences/ ; 2022YFA1304300//National Key R&amp;D Program of China/ ; 2022YFA1304300//National Key R&amp;D Program of China/ ; NSFC82221004//Foundation for Innovative Research Groups of the National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Microbiota/genetics ; Female ; *Bacteria/genetics/classification/isolation &amp; purification/drug effects ; Male ; Adult ; Metagenomics/methods ; *Oropharynx/microbiology ; Middle Aged ; *Drug Resistance, Microbial/genetics ; Family Characteristics ; Young Adult ; Metagenome ; }, abstract = {BACKGROUND: The human microbiome is transmissible between individuals, including pathogens and commensals with metabolic and immune-modulating effects, which could influence susceptibility, severity, and outcomes of both infection and non-infection diseases. However, limited studies of respiratory microbiome transmission within populations have been conducted. Herein, we performed species- and strain-level metagenomic analyses on oropharyngeal (OP) swabs from 1046 healthy urban dwellers across 13 districts, including 111 households with at least two cohabitants, to elucidate the transmission dynamics of the respiratory microbiome within households and communities.<br><br>RESULTS: We found that geographic districts accounted for the greatest variation in the OP microbiome, with unrelated individuals from the same district showing greater microbiome similarity and higher strain-sharing rates than those from different districts. Cohabitants, especially spouses and siblings, exhibited similar microbial abundances and shared more strains, with 16.7% (IQR 0.0-33.3%) of strains shared among cohabitants, compared to 0.0% (IQR 0.0-11.1%) in non-cohabiting pairs (p&#x2009;<&#x2009;0.05). Both respiratory commensals and opportunistic pathogens were shared among cohabitants. In contrast, no evidence of vertical transmission was detected between mother-offspring pairs. Additionally, the OP microbiome contained diverse antibiotic resistance genes (ARGs), with 15.0% linked to mobile genetic elements (MGEs) or plasmids; the flanking sequences of these ARGs were more conserved across species than those of non-MGE-associated ARGs, suggesting horizontal transfer of ARGs among respiratory microorganisms.<br><br>CONCLUSIONS: In summary, we characterized the transmissible nature of the OP microbiome and the risk of ARG dissemination among respiratory microorganisms. These findings underscore the role of respiratory microbes and ARGs exchange in shaping the microbiome of healthy populations and emphasize their relevance to public health strategies for respiratory health management. Video Abstract.}, }
@article {pmid40329425, year = {2025}, author = {Vigneron, A and Cloarec, LA and Brochier-Armanet, C and Flandrois, JP and Troussellier, M and Bernard, C and Agogué, H and Oger, PM and Hugoni, M}, title = {Genomic characterisation of novel extremophile lineages from the thalassohaline lake Dziani Dzaha expands the metabolic repertoire of the PVC superphylum.}, journal = {Environmental microbiome}, volume = {20}, number = {1}, pages = {48}, pmid = {40329425}, issn = {2524-6372}, support = {project SUBSILAKE, ANR-21-CE02-0027//Agence Nationale de la Recherche/ ; project MARWEL, ANR-21-CE20-0049//Agence Nationale de la Recherche/ ; project SUBSILAKE, ANR-21-CE02-0027//Agence Nationale de la Recherche/ ; }, abstract = {BACKGROUND: Extreme environments are useful systems to investigate limits of life, microbial biogeography and ecology, and the adaptation and evolution of microbial lineages. Many novel microbial lineages have been discovered in extreme environments, especially from the Planctomycetota-Verrucomicrobiota-Chlamydiota (PVC) superphyla. However, their evolutionary history and roles in ecosystem functioning and microbiome assemblage are poorly understood.<br><br>RESULTS: Applying a genome-centric approach on an 8-year metagenomic timeseries produced from the hypersaline and hyperalkaline waters of Lake Dziani Dzaha (Mayotte), we recovered 5 novel PVC extremophilic candidate lineages from the biosphere of the lake. Sibling to Elusimicrobia and Omnitrophota, these lineages represented novel halophilic clades, with global distributions bounded to soda lakes and hypersaline hydrosystems. Genome mining of these newly defined clades revealed contrasted, but ecologically relevant, catabolic capabilities involved in the carbon, hydrogen and iron/electron cycles of the Dziani Dzaha ecosystem. This also includes extracellular electron transfer for two of them, suggesting metal reduction or potential electron exchanges with other members of the lake community. By contrast, a putative extracellular giant protein with multiple carbohydrate binding domains and toxin-like structures, as observed in virulence factors, was identified in the genome of another of these clades, suggesting predatory capabilities.<br><br>CONCLUSIONS: Our results provided genomic evidences for original metabolism in novel extremophile lineages of the PVC superphyla, revealing unforeseen implications for members of this widespread and diverse bacterial radiation in aquatic saline ecosystems. Finally, monitoring the in-situ distribution of these lineages through the timeseries reveals the drastic effects of environmental perturbations on extreme ecosystem biodiversity.}, }
@article {pmid40329386, year = {2025}, author = {Hou, L and Zhao, Z and Steger-Mähnert, B and Jiao, N and Herndl, GJ and Zhang, Y}, title = {Microbial metabolism in laboratory reared marine snow as revealed by a multi-omics approach.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {114}, pmid = {40329386}, issn = {2049-2618}, support = {42206098//National Natural Science Foundation of China-China Academy of General Technology Joint Fund for Basic Research/ ; 42125603//National Natural Science Foundation of China-China Academy of General Technology Joint Fund for Basic Research/ ; MELRS2327//State Key Laboratory of Marine Environmental Science/ ; I4978-B//Austrian Science Fund/ ; }, mesh = {*Snow/microbiology ; Gammaproteobacteria/metabolism/genetics/classification ; Metagenomics/methods ; Metagenome ; *Seawater/microbiology ; *Microbiota ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; Phytoplankton/microbiology/metabolism ; Multiomics ; }, abstract = {BACKGROUND: Marine snow represents an organic matter-rich habitat and provides substrates for diverse microbial populations in the marine ecosystem. However, the functional diversity and metabolic interactions within the microbial community inhabiting marine snow remain largely underexplored, particularly for specific metabolic pathways involved in marine snow degradation. Here, we used a multi-omics approach to explore the microbial response to laboratory-reared phytoplankton-derived marine snow.<br><br>RESULTS: Our results demonstrated a dramatic shift in both taxonomic and functional profiles of the microbial community after the formation of phytoplankton-derived marine snow using a rolling tank system. The changes in microbial metabolic processes were more pronounced in the metaproteome than in the metagenome in response to marine snow. Fast-growing taxa within the Gammaproteobacteria were the most dominant group at both the metagenomic and metaproteomic level. These Gammaproteobacteria possessed a variety of carbohydrate-active enzymes (CAZymes) and transporters facilitating substrate cleavage and uptake, respectively. Analysis of metagenome-assembled genomes (MAGs) revealed that the response to marine snow amendment was primarily mediated by Alteromonas, Vibrio, and Thalassotalea. Among these, Alteromonas exclusively expressing auxiliary activities 2 (AA2) of the CAZyme subfamily were abundant in both the free-living (FL) and marine snow-attached (MA) microbial communities. Thus, Alteromonas likely played a pivotal role in the degradation of marine snow. The enzymes of AA2 produced by these Alteromonas MAGs are capable of detoxifying peroxide intermediates generated during the breakdown of marine snow into smaller poly- and oligomers, providing available substrates for other microorganisms within the system. In addition, Vibrio and Thalassotalea MAGs exhibited distinct responses to these hydrolysis products of marine snow in different size fractions, suggesting a distinct niche separation. Although chemotaxis proteins were found to be enriched in the proteome of all three MAGs, differences in transporter proteins were identified as the primary factor contributing to the niche separation between these two groups. Vibrio in the FL fraction predominantly utilized ATP-binding cassette transporters (ABCTs), while Thalassotalea MAGs in the MA fraction primarily employed TonB-dependent outer membrane transporters (TBDTs).<br><br>CONCLUSIONS: Our findings shed light on the essential metabolic interactions within marine snow-degrading microbial consortia, which employ complementary physiological mechanisms and survival strategies to effectively scavenge marine snow. This work advances our understanding of the fate of marine snow and the role of microbes in carbon sequestration in the ocean. Video Abstract.}, }
@article {pmid40328980, year = {2025}, author = {Liébana-García, R and López-Almela, I and Olivares, M and Romaní-Pérez, M and Manghi, P and Torres-Mayo, A and Tolosa-Enguís, V and Flor-Duro, A and Bullich-Vilarrubias, C and Rubio, T and Rossini, V and Segata, N and Sanz, Y}, title = {Gut commensal Phascolarctobacterium faecium retunes innate immunity to mitigate obesity and metabolic disease in mice.}, journal = {Nature microbiology}, volume = {10}, number = {6}, pages = {1310-1322}, pmid = {40328980}, issn = {2058-5276}, mesh = {Animals ; *Gastrointestinal Microbiome/immunology ; *Obesity/immunology/microbiology ; *Immunity, Innate ; Mice ; Humans ; *Metabolic Diseases/immunology/microbiology ; Male ; Macrophages/immunology ; Female ; Mice, Inbred C57BL ; Symbiosis ; Disease Models, Animal ; Metagenome ; }, abstract = {The gut microbiota may protect against obesity and chronic metabolic conditions by regulating the immune response to dietary triggers. Yet the specific bacteria that control the overactivation of the immune system in obesity and their mode of action remain largely unknown. Here we surveyed 7,569 human metagenomes and observed an association between the gut symbiont Phascolarctobacterium faecium and non-obese adults regardless of nationality, sex or age. In a mouse model of diet-induced obesity, we confirmed the specificity of P. faecium DSM 32890 anti-obesogenic properties compared with other species of the same genus. P. faecium reversed the inflammatory phenotype associated with obesity. Specifically, P. faecium promoted polarization of alternatively activated macrophages (M2), which reversed the obesity-induced increase in gut-resident type 1 innate lymphoid cells. This resulted in mitigation of glucose intolerance, adiposity and body weight gain irrespective of treatment with live or pasteurized bacteria. The metabolic benefits were independent of the adaptive immune system, but they were abolished by an inhibitor of M2 polarization in mice. P. faecium directly promoted M2-macrophage polarization through TLR2 signalling and these effects seemed to be independent of gut microbiota changes. Overall, we identify a previously undescribed gut commensal bacterium that could help mitigate obesity and metabolic comorbidities by retuning the innate immune response to hypercaloric diets.}, }
@article {pmid40328944, year = {2025}, author = {Kim, Y and Worby, CJ and Acharya, S and van Dijk, LR and Alfonsetti, D and Gromko, Z and Azimzadeh, PN and Dodson, KW and Gerber, GK and Hultgren, SJ and Earl, AM and Berger, B and Gibson, TE}, title = {Longitudinal profiling of low-abundance strains in microbiomes with ChronoStrain.}, journal = {Nature microbiology}, volume = {10}, number = {5}, pages = {1184-1197}, pmid = {40328944}, issn = {2058-5276}, support = {R35 GM149270/GM/NIGMS NIH HHS/United States ; R35GM141861//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R01 GM130777/GM/NIGMS NIH HHS/United States ; R01DK121822//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R21 AI154075/AI/NIAID NIH HHS/United States ; R35 GM141861/GM/NIGMS NIH HHS/United States ; U19 AI110818/AI/NIAID NIH HHS/United States ; R21AI154075//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; U19AI110818//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R35 GM143056/GM/NIGMS NIH HHS/United States ; R35GM149270//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R01 DK121822/DK/NIDDK NIH HHS/United States ; R35GM143056//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; }, mesh = {Humans ; *Microbiota/genetics ; Feces/microbiology ; Female ; *Metagenomics/methods ; Bayes Theorem ; Longitudinal Studies ; Escherichia coli/genetics/isolation &amp; purification/classification ; Infant ; Algorithms ; Enterococcus faecalis/genetics/isolation &amp; purification/classification ; Adult ; *Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {The ability to detect and quantify microbiota over time from shotgun metagenomic data has a plethora of clinical, basic science and public health applications. Given these applications, and the observation that pathogens and other taxa of interest can reside at low relative abundance, there is a critical need for algorithms that accurately profile low-abundance microbial taxa with strain-level resolution. Here we present ChronoStrain: a sequence quality- and time-aware Bayesian model for profiling strains in longitudinal samples. ChronoStrain explicitly models the presence or absence of each strain and produces a probability distribution over abundance trajectories for each strain. Using synthetic and semi-synthetic data, we demonstrate how ChronoStrain outperforms existing methods in abundance estimation and presence/absence prediction. Applying ChronoStrain to two human microbiome datasets demonstrated its improved interpretability for profiling Escherichia coli strain blooms in longitudinal faecal samples from adult women with recurring urinary tract infections, and its improved accuracy for detecting Enterococcus faecalis strains in infant faecal samples. Compared with state-of-the-art methods, ChronoStrain's ability to detect low-abundance taxa is particularly stark.}, }
@article {pmid40328731, year = {2025}, author = {Wei, C and Xu, X and Zhang, J and Wang, X and Han, T and Zhang, Y and Pan, S and Ming, Z and Li, R and Lou, F and Cheng, Y and Xu, H and Sun, X and Geng, G and Pan, Y and Liu, Q and Qi, H and Yan, X and Dang, K and Zhou, J and Sun, C and Li, Y}, title = {Timing of unsaturated fat intake improves insulin sensitivity via the gut microbiota-bile acid axis: a randomized controlled trial.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4211}, pmid = {40328731}, issn = {2041-1723}, support = {Key Program 82030100//National Natural Science Foundation of China (National Science Foundation of China)/ ; Joint Fund Project U24A20768//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Middle Aged ; Male ; *Insulin Resistance/physiology ; Female ; *Bile Acids and Salts/metabolism ; Blood Glucose/metabolism ; Postprandial Period ; Insulin/blood/metabolism ; Double-Blind Method ; Aged ; *Dietary Fats, Unsaturated/administration &amp; dosage ; Feces/microbiology/chemistry ; Adult ; Prediabetic State/metabolism/diet therapy/microbiology ; }, abstract = {The timing of dietary total fat intake influences glucose homeostasis, however, the impact of unsaturated fat (USFA) intake has yet to be explored. This 12-week, double-blind, randomized, controlled, 2 × 2 factorial-designed feeding trial investigated the effects of timing (lunch or dinner) and types of dietary USFA (high monounsaturated fat or polyunsaturated fat diet) intake on glucose metabolism in seventy prediabetes participants (mean age, 57 years). Sixty participants with completed fecal samples were included in the final analysis (n = 15 for each group). Postprandial serum glucose was first primary outcome, postprandial insulin levels and insulin sensitivity indices were co-primary outcomes Secondary outcomes were continuous glucose levels, serum fatty acid profile, gut microbiome (metagenomic sequencing) and fecal metabolites. Results showed no significant differences in postprandial glucose between groups. However, USFA intake at lunch (vs. dinner) improved insulin sensitivity and reduced postprandial insulin and serum free saturated fatty acid (Ptiming < 0.05, Ptype > 0.05, Pinteraction > 0.05), which was associated with alterations in gut microbiome and bile acid metabolism, regardless of USFA type. In summary, these results suggest that advancing timing of USFA intake improves insulin sensitivity through the gut microbiome and bile acid metabolism. Trial registration: ChiCTR2100045645.}, }
@article {pmid40328090, year = {2025}, author = {Xia, Y and Lan, Y and Xu, Y and Liu, F and Chen, X and Luo, J and Xu, H and Liu, Y}, title = {Effects of microplastics and tetracycline induced intestinal damage, intestinal microbiota dysbiosis, and antibiotic resistome: metagenomic analysis in young mice.}, journal = {Environment international}, volume = {199}, number = {}, pages = {109512}, doi = {10.1016/j.envint.2025.109512}, pmid = {40328090}, issn = {1873-6750}, mesh = {Animals ; Mice ; *Gastrointestinal Microbiome/drug effects ; *Microplastics/toxicity ; *Anti-Bacterial Agents/toxicity ; *Tetracycline/toxicity ; *Dysbiosis/chemically induced ; Metagenomics ; *Intestines/drug effects ; *Drug Resistance, Microbial/genetics ; }, abstract = {Microplastics (MPs) and antibiotic tetracycline (TC) are widespread in the environment and constitute emerging combined contaminants. Young individuals are particularly vulnerable to agents that disrupt intestinal health and development. However, the combined effects of MPs and TC remain poorly understood. In this study, we developed a young mouse model exposed to polystyrene MPs, either alone or in combination with TC for 8 weeks to simulate real-life dietary exposure during early life. Our findings revealed that concurrent exposure to MPs and TC caused the most severe intestinal barrier dysfunction driven by inflammatory activation and oxidative imbalance. Moreover, exposure to MPs and TC reduced the abundance of potential probiotics while promoting the growth of opportunistic pathogens. Metagenomic analysis further indicated that co-exposure to MPs and TC enhanced the abundance of bacteria carrying either antibiotic resistance genes (ARGs) or virulence factor genes (VFGs), contributing to the widespread dissemination of potentially harmful genes. Finally, a strong positive correlation was observed between microbiota dysbiosis, ARGs, and VFGs. In general, this study highlighted the hazards of MPs and antibiotics to intestinal health in young mice, which provided a new perspective into the dynamics of pathogens, ARGs, and VFGs in early-life intestinal environments.}, }
@article {pmid40327993, year = {2025}, author = {Grafakou, ME and Pferschy-Wenzig, EM and Aziz-Kalbhenn, H and Kelber, O and Moissl-Eichinger, C and Bauer, R}, title = {Bidirectional interactions between St. John´s wort and gut microbiome: Potential implications on gut-brain-axis.}, journal = {Biomedicine &amp; pharmacotherapy = Biomedecine &amp; pharmacotherapie}, volume = {187}, number = {}, pages = {118111}, doi = {10.1016/j.biopha.2025.118111}, pmid = {40327993}, issn = {1950-6007}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/physiology ; *Hypericum/chemistry ; *Plant Extracts/pharmacology ; *Brain/drug effects/metabolism ; Male ; Adult ; Female ; Feces/microbiology ; Antidepressive Agents/pharmacology ; *Brain-Gut Axis/drug effects ; }, abstract = {Emerging evidence highlights the role of gut microbiome in mental health disorders, including depression, raising the question whether the action of antidepressants could be mediated, at least in part, via the microbiome-gut-brain axis. To explore this, we subjected a St. John's wort extract (STW 3-VI), clinically proven to be effective in mild to moderate depression, to a model of the upper and lower intestinal tract, including static in vitro predigestion followed by ex vivo incubation with human microbiota samples. To cover the interindividual diversity of gut microbiome composition, fecal samples from ten healthy volunteers were used. Although unchanged levels of most annotated compounds were observed during simulated upper intestinal tract digestion, incubation with fecal microbiota led to a significant change of the chemical profile of the extract. While hyperforins remained stable, flavonoids and hypericins were rapidly biotransformed, suggesting that they may act as prodrugs. Several metabolites were formed, many of which are known to be involved in gut-brain communication. Differential abundance analysis revealed significant changes in microbiome composition, particularly for taxa known to be potentially associated with depression. Among others, the Firmicutes/Bacteroidetes ratio, known to be lowered in depressive patients, was increased. Functional profiling revealed modulation of pathways involved in gut-brain communication, such as tyrosine and tryptophan metabolism. These bidirectional interactions suggest for the first time the gut microbiome as a potential mediator of the pharmacological effects of St. John's wort extracts via the microbiome-gut-brain axis.}, }
@article {pmid40327666, year = {2025}, author = {Yang, X and Zhang, Y and Xu, Y and Xu, Y and Zhang, M and Guan, Q and Hu, W and Tun, HM and Xia, Y}, title = {Microbial Disturbances Caused by Pesticide Exposure and Their Predictive Implications for Gestational Diabetes Mellitus.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {19}, pages = {9449-9460}, doi = {10.1021/acs.est.5c01076}, pmid = {40327666}, issn = {1520-5851}, mesh = {Female ; *Diabetes, Gestational ; Pregnancy ; Humans ; *Pesticides ; *Gastrointestinal Microbiome/drug effects ; Adult ; RNA, Ribosomal, 16S ; Biomarkers ; }, abstract = {Previous studies have suggested that pesticide exposure and gut microbiome alterations are associated with gestational diabetes mellitus (GDM) risk. Understanding the complex interactive effect of these factors on GDM is essential. In a cohort of 852 pregnant women, we assessed pesticide levels in serum and analyzed the gut microbiota using 16S rRNA and shotgun metagenomic sequencing. We explored the interactions between pesticides and gut microbiota, assessed their roles in GDM development, and proposed a predictive model based on identified biomarkers. We identified an environmental risk score (ERS), denoting the pesticide mixture level significantly associated with GDM, with the gut microbiota, particularly involving the Dorea branch, playing a crucial mediating role. In addition, we found an interactive effect of pesticide exposure and gut microbiota on GDM risk. Notably, low Prevotella enrichment combined with high ERS arisen from pesticide levels led to a 10.36-fold increased GDM risk. The identified pesticide and gut microbial biomarkers achieved high predictive accuracy for GDM (AUC: 0.833, 95% CI: 0.748-0.918). Collectively, maternal pesticide exposure may induce disrupted microbiome-dependent glycemic alteration, necessitating future assessment of clinical implications. Potential GDM markers can serve as targets for therapeutic intervention caused by pesticides, leading to prevention.}, }
@article {pmid40327160, year = {2025}, author = {Li, N and Gao, G and Zhang, T and Zhao, C and Zhao, Y and Zhang, Y and Sun, Z}, title = {Co-variation of Host Gene Expression and Gut Microbiome in Intestine-Specific Spp1 Conditional Knockout Mice.}, journal = {Current microbiology}, volume = {82}, number = {6}, pages = {282}, pmid = {40327160}, issn = {1432-0991}, support = {32325040//National Natural Science Foundation of China/ ; 2022BINCMCF007//Nutrition and Care of Maternal &amp; Child Research Fund Project" of Biostime Institute of Nutrition &amp; Care/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Mice ; *Osteopontin/genetics/metabolism ; Mice, Knockout ; Lipid Metabolism/genetics ; *Intestines/microbiology ; Mice, Inbred C57BL ; Transcriptome ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Osteopontin, which is a highly phosphorylated and glycosylated acidic secreted protein encoded by the secreted phosphoprotein 1 (Spp1) gene, plays a crucial role in immune regulation, inflammatory responses, and cell adhesion. However, its impact on intestinal gene expression and gut microbiota remains underexplored. In this study, we developed an Spp1 conditional knockout mouse model to investigate alterations in the intestinal transcriptome and microbiome, with particular emphasis on changes in gene expression and predicted metabolic pathways. Our findings demonstrated that Spp1 gene conditional knockout significantly modified the expression of genes involved in immune regulation and lipid metabolism. Moreover, metagenomic analysis revealed marked shifts in gut microbial diversity and predicted the metabolic pathways associated with digestion, absorption, and lipid metabolism. These results suggest that Spp1 is instrumental in maintaining gut microbial equilibrium and in regulating host lipid metabolism and immune responses. This study offers new insights into the role of Spp1 in host-microbiota interactions and the potential foundations for developing related therapeutic strategies.}, }
@article {pmid40326765, year = {2025}, author = {Lindner, BG and Graham, KE and Phaneuf, JR and Hatt, JK and Konstantinidis, KT}, title = {SourceApp: A Novel Metagenomic Source Tracking Tool that can Distinguish between Fecal Microbiomes Using Genome-To-Source Associations Benchmarked Against Mixed Input Spike-In Mesocosms.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {19}, pages = {9507-9516}, pmid = {40326765}, issn = {1520-5851}, mesh = {*Feces/microbiology ; *Metagenomics ; Animals ; *Microbiota ; Metagenome ; }, abstract = {Methodologies utilizing metagenomics are attractive to fecal source tracking (FST) aims for assessing the presence and proportions of various fecal inputs simultaneously. Yet, compared to established culture- or PCR-based techniques, metagenomic approaches for these purposes are rarely benchmarked or contextualized for practice. We performed shotgun sequencing experiments (n = 35) of mesocosms constructed from the water of a well-studied recreational and drinking water reservoir spiked with various fecal (n = 6 animal sources, 3 wastewater sources, and 1 septage source) and synthetic microbiome spike-ins (n = 1) introduced at predetermined cell concentrations to simulate fecal pollution events of known composition. We built source-associated genome databases using publicly available reference genomes and metagenome assembled genomes (MAGs) recovered from short- and long-read sequencing of the fecal spike-ins, and then created an associated bioinformatic tool, called SourceApp, for inferring source attribution and apportionment by mapping the metagenomic data to these genome databases. SourceApp's performance varied substantially by source, with cows being underestimated due to under sampling of cow fecal microbiomes. Parameter tuning revealed sensitivity and specificity near 0.90 overall, which exceeded all alternative tools. SourceApp can assist researchers with analyzing and interpreting shotgun sequencing data and developing standard operating procedures on the frontiers of metagenomic FST.}, }
@article {pmid40326511, year = {2025}, author = {Zhu, Y and Liu, Q and Alffenaar, JW and Wang, S and Cao, J and Dong, S and Zhou, X and Li, X and Li, X and Xiong, H and Zhu, L and Hu, Y and Wang, W}, title = {Gut Microbiota in Patients with Tuberculosis Associated with Different Drug Exposures of Antituberculosis Drugs.}, journal = {Clinical pharmacology and therapeutics}, volume = {118}, number = {1}, pages = {252-262}, doi = {10.1002/cpt.3687}, pmid = {40326511}, issn = {1532-6535}, support = {ZD2021CY001//Shanghai Municipal Science and Technology Major Project/ ; GWVI-11.1-03//Shanghai New Three-year Action Plan for Public Health/ ; 82073612//National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Antitubercular Agents/pharmacokinetics/therapeutic use/administration &amp; dosage ; Male ; Female ; Middle Aged ; Adult ; RNA, Ribosomal, 16S/genetics ; *Tuberculosis, Pulmonary/drug therapy/microbiology ; Rifampin/pharmacokinetics ; Cohort Studies ; Pyrazinamide/pharmacokinetics ; Aged ; Metagenomics ; Isoniazid/pharmacokinetics ; }, abstract = {Interindividual variability in drug exposure can significantly influence treatment outcomes and may lead to drug concentration-related side effects during tuberculosis (TB) treatment. Although the gut microbiota is known to affect drug metabolism, its impact on anti-TB drugs has not been thoroughly explored. This study sought to elucidate the relationship between pre-treatment gut microbiota and drug exposure levels among patients with pulmonary TB. Two cohorts were analyzed: a discovery cohort (N = 99) and a validation cohort (N = 32), both comprising patients undergoing anti-TB therapy with rifampicin, isoniazid, pyrazinamide, and ethambutol. The gut microbiota patterns of participants from the discovery cohort and the validation cohort were profiled by 16S rRNA gene sequencing and metagenomics, respectively. Analyses of both cohorts robustly established a positive association between pre-treatment microbial diversity and drug exposure, as well as significant differences in gut microbiota composition across various drug exposure groups. At the species level, Faecalibacterium prausnitzii was positively associated with drug exposure to rifampicin. Moreover, functional analysis revealed that starch and sucrose metabolism and secondary bile acid biosynthesis were more abundant in the high drug exposure group. To identify biomarkers capable of stratifying patients based on their drug exposure levels, 11 taxa, represented by Faecalibacterium, were selected in the discovery cohort (AUC = 0.992) and were confirmed in the validation cohort with high predictive accuracy (AUC = 0.894). This study demonstrated a correlation between microbial dysbiosis and reduced exposure to anti-TB medications. Optimizing treatment by regulating gut microbiota to improve drug exposure levels requires further validation through larger scale multicenter clinical trials.}, }
@article {pmid40325896, year = {2025}, author = {Ikegwuoha, NPP and Hanekom, T and Booysen, E and Jason, C and Parker-Nance, S and Davies-Coleman, MT and van Zyl, LJ and Trindade, M}, title = {Fimsbactin Siderophores From a South African Marine Sponge Symbiont, Marinomonas sp. PE14-40.}, journal = {Microbial biotechnology}, volume = {18}, number = {5}, pages = {e70155}, pmid = {40325896}, issn = {1751-7915}, support = {//South African Medical Research Council (Self-Initiated grant)/ ; 87326//DSI/NRF SARChI research chair in Microbial Genomics/ ; 312184//European Union PharmaSea Consortium/ ; 129660//National Research Foundation/ ; }, mesh = {*Siderophores/chemistry/metabolism/genetics/isolation &amp; purification ; Multigene Family ; Animals ; Biosynthetic Pathways/genetics ; *Porifera/microbiology ; Symbiosis ; Hydroxamic Acids/metabolism/chemistry ; }, abstract = {Low iron levels in marine habitats necessitate the production of structurally diverse siderophores by many marine bacterial species for iron acquisition. Siderophores exhibit bioactivities ranging from chelation for iron reduction in hemochromatosis sufferers to antimicrobial activity either in their own right or when coupled to known antibiotics for targeted delivery or for molecular imaging. Thus, marine environments are a sought-after resource for novel siderophores that could have pharmaceutical or industrial application. The fimsbactins A-F (1-6) are mixed catechol-hydroxamate siderophores that have only been reported to be produced by Acinetobacter species with the fimsbactin biosynthetic gene clusters (BGCs) widespread among species within this genus. Here, we identified a putative fimsbactin BGC from an uncharacterized marine isolate, Marinomonas sp. PE14-40. Not only was the gene synteny not conserved when comparing the pathway from Marinomonas sp. PE14-40 to the fimsbactin BGC from Acinetobacter sp., but five of the core biosynthetic genes found in the canonical fimsbactin BGC are located elsewhere on the genome and do not form part of the core cluster in Marinomonas sp. PE14-40, with four of these, fbsBCDL, colocalized. Through ESI-MS/MS analysis of extracts from Marinomonas sp. PE14-40, the known fimsbactin analogues 1 and 6 were identified, as well as two new fimsbactin analogues, 7 and 8, containing a previously unreported L-lysine-derived hydroxamate moiety, N1-acetyl-N1-hydroxycadaverine. Feeding experiments using stable isotope-label L-lysine provided further evidence of the N1-acetyl-N1-hydroxycadaverine moiety in 7 and 8. The study demonstrates functional conservation in seemingly disparate biosynthetic pathways and enzyme promiscuity's role in producing structurally diverse compounds.}, }
@article {pmid40325616, year = {2025}, author = {Xu, HY and Jiang, MT and Yang, YF and Huang, Y and Yang, WD and Li, HY and Wang, X}, title = {Microalgae-Based Fucoxanthin Attenuates Rheumatoid Arthritis by Targeting the JAK-STAT Signaling Pathway and Gut Microbiota.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {19}, pages = {11708-11719}, doi = {10.1021/acs.jafc.4c12474}, pmid = {40325616}, issn = {1520-5118}, mesh = {*Xanthophylls/administration &amp; dosage ; *Arthritis, Rheumatoid/drug therapy/microbiology/genetics/metabolism/immunology ; *Gastrointestinal Microbiome/drug effects ; Humans ; Signal Transduction/drug effects ; Animals ; *Microalgae/chemistry ; Mice ; Male ; *Janus Kinases/genetics/metabolism/immunology ; *STAT Transcription Factors/genetics/metabolism/immunology ; *Diatoms/chemistry ; }, abstract = {Fucoxanthin, an abundant carotenoid in marine algae, has garnered attention for its diverse health benefits, including anti-inflammatory and anticancer properties. Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint inflammation and damage. This study investigated the therapeutic potential of fucoxanthin extracted from Phaeodactylum tricornutum in collagen-induced RA. Our results demonstrated that fucoxanthin significantly alleviated RA symptoms, including weight loss, joint swelling, and decreased appetite. Histological analysis revealed that fucoxanthin mitigated synovial inflammation, cartilage damage, and bone erosion. Mechanistically, transcriptomic analysis and cell experiments indicated that fucoxanthin suppressed the JAK-STAT signaling pathway by downregulating the expression of inflammatory cytokines, such as IL-6 and IL-1β. Furthermore, metagenomic analysis suggested that fucoxanthin restored the altered gut microbiota composition associated with RA. These findings highlight the therapeutic potential of fucoxanthin from P. tricornutum in the management of RA by targeting multiple pathways, including inflammation and gut microbiota.}, }
@article {pmid40325116, year = {2025}, author = {Yiminniyaze, R and Zhang, Y and Zhu, N and Zhang, X and Wang, J and Li, C and Wumaier, G and Zhou, D and Xia, J and Li, S and Dong, L and Zhang, Y and Zhang, Y and Li, S}, title = {Characterizations of lung cancer microbiome and exploration of potential microbial risk factors for lung cancer.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {15683}, pmid = {40325116}, issn = {2045-2322}, support = {82241028//National Clinical Key Specialty Project Foundation/ ; 82270058//National Natural Science Foundation of China/ ; 22Y11900600//Shanghai Year 2022 Science and Technology Innovation Action Plan Medical Innovation Research Special Project/ ; }, mesh = {Humans ; *Lung Neoplasms/microbiology/pathology ; Male ; Female ; Risk Factors ; *Microbiota/genetics ; Middle Aged ; Aged ; Lung/microbiology/pathology ; High-Throughput Nucleotide Sequencing ; Adult ; Shewanella/isolation &amp; purification/genetics ; }, abstract = {Recent studies have indicated that the lung microbiome may contribute to the development and progression of lung cancer, although the precise mechanisms remain to be fully elucidated. This study sought to delineate the microbial composition within lung cancer tissues and identify potential microbial risk factors. Tissue samples were collected from patients newly diagnosed with pulmonary opacities, and metagenomic next-generation sequencing was employed to analyze these samples. Tissue samples were collected from 130 patients with pulmonary opacities, categorized into lung cancer (50 cases), pulmonary infection (53 cases), and non-infectious pulmonary diseases (27 cases). The non-infectious group served as the primary control. The diversity of the lung microbiome in lung cancer tissues was found to be comparable to that observed in non-infectious benign pulmonary conditions. Specific phyla and genera exhibited increased abundance in lung cancer tissues. Additionally, correlations were established between certain microorganisms and clinical characteristics associated with lung cancer. Multivariate binary logistic regression analysis revealed that age and Shewanella were independent risk factors for lung cancer development. This study suggests that the composition of the lung microbiome differs significantly between individuals with lung cancer and those with benign pulmonary conditions, with certain microbes such as Shewanella potentially serving as risk factors for lung cancer progression.}, }
@article {pmid40324646, year = {2025}, author = {Shen, H and Wang, D and Huang, Y and Yang, Y and Ji, S and Zhu, W and Liu, Q}, title = {2,3,7,8-tetrachlorodibenzofuran modulates intestinal microbiota and tryptophan metabolism in mice.}, journal = {Life sciences}, volume = {373}, number = {}, pages = {123679}, doi = {10.1016/j.lfs.2025.123679}, pmid = {40324646}, issn = {1879-0631}, mesh = {Animals ; *Tryptophan/metabolism ; *Gastrointestinal Microbiome/drug effects ; Mice ; Male ; *Polychlorinated Dibenzodioxins/toxicity ; Mice, Inbred C57BL ; Environmental Pollutants/toxicity ; Indoles/metabolism/pharmacology ; Intestinal Mucosa/metabolism/drug effects ; *Benzofurans/toxicity ; }, abstract = {Persistent organic pollutants (POPs) are known to disrupt gut microbiota composition and host metabolism, primarily through dietary exposure. In this study, we investigate the impact of 2,3,7,8-tetrachlorodibenzofuran (TCDF) on gut microbiota and host metabolic processes. RNA-seq analysis revealed that TCDF exposure significantly affected tryptophan metabolism, lipid metabolic pathways, and immune system function. Metagenomic and metabolomic analyses further showed that TCDF reduced the abundance of Mucispirillum schaedleri and levels of two key tryptophan metabolites, indole-3-carboxaldehyde (3-IAld) and Indole acrylic acid (IA). Supplementation with 3-IAld and IA alleviated TCDF-induced liver toxicity in mouse, as evidenced by reduced Cyp1a1 expression, and mitigated intestinal inflammation, reflected by lower pro-inflammatory cytokines (Ifn-γ and Il-1β) in the colon. Additionally, 3-IAld and IA supplementation enhanced intestinal barrier function, as demonstrated by increased Mucin 2 (MUC2) expression in the gut mucosa of mouse. These findings suggest that TCDF exposure disrupts the gut microbiome and host metabolic balance, and highlight the potential therapeutic role of tryptophan-derived metabolites in mitigating environmental pollutant-induced damage.}, }
@article {pmid40323477, year = {2025}, author = {Kiran, NS and Chatterjee, A and Yashaswini, C and Deshmukh, R and Alsaidan, OA and Bhattacharya, S and Prajapati, BG}, title = {The gastrointestinal mycobiome in inflammation and cancer: unraveling fungal dysbiosis, pathogenesis, and therapeutic potential.}, journal = {Medical oncology (Northwood, London, England)}, volume = {42}, number = {6}, pages = {195}, pmid = {40323477}, issn = {1559-131X}, mesh = {Humans ; *Dysbiosis/microbiology ; *Mycobiome ; *Gastrointestinal Microbiome ; *Inflammatory Bowel Diseases/microbiology ; *Inflammation/microbiology ; *Gastrointestinal Neoplasms/microbiology ; Fungi/pathogenicity ; Animals ; }, abstract = {The gastrointestinal mycobiome, comprising diverse fungal species, plays a significant role in gastrointestinal carcinogenesis and inflammatory bowel disease (IBD) pathogenesis. Recent studies have demonstrated that dysbiosis of the gut mycobiome, characterized by an overrepresentation of pathogenic fungi such as Candida albicans and Aspergillus, correlates with increased inflammation and cancer risk. For instance, C. albicans has been shown to induce colonic inflammation through the activation of pattern recognition receptors and the release of pro-inflammatory cytokines, exacerbating IBD symptoms and potentially facilitating tumorigenesis. Additionally, metagenomic analyses have revealed distinct fungal signatures in colorectal cancer tissues compared to adjacent healthy tissues, highlighting the potential of fungi as biomarkers for disease progression. Mechanistically, gut fungi contribute to disease through biofilm formation, mycotoxin secretion (e.g., aflatoxins, candidalysin), pro-inflammatory cytokine induction (e.g., IL-1β, IL-17), and disruption of epithelial barriers-creating a tumor-promoting and inflammation-prone environment. Furthermore, the interplay between fungi and the bacterial microbiome can amplify inflammatory responses, contributing to chronic inflammation and cancer development. Fungal interactions with bacterial communities also play a synergistic role in shaping mucosal immune responses and enhancing disease severity in both cancer and IBD contexts. As research continues to elucidate these complex fungal-host and fungal-bacterial interactions, targeting the gut mycobiome may offer novel therapeutic avenues for managing IBD and gastrointestinal cancers, emphasizing the need for integrated, mechanistically informed approaches to microbiome research.}, }
@article {pmid40323435, year = {2025}, author = {Reynolds, J and Yoon, JY}, title = {Fluorescence-based spectrometric and imaging methods and machine learning analyses for microbiota analysis.}, journal = {Mikrochimica acta}, volume = {192}, number = {6}, pages = {334}, pmid = {40323435}, issn = {1436-5073}, mesh = {*Machine Learning ; *Microbiota ; Humans ; Spectrometry, Fluorescence/methods ; *Bacteria/isolation &amp; purification/genetics ; }, abstract = {Most microbiota determination (skin, gut, soil, etc.) are currently conducted in a laboratory using expensive equipment and lengthy procedures, including culture-dependent methods, nucleic acid amplifications (including quantitative PCR), DNA microarray, immunoassays, 16S rRNA sequencing, shotgun metagenomics, and sophisticated mass spectrometric methods. In situ and rapid analysis methods are desirable for fast turnaround time and low assay cost. Fluorescence identification of bacteria and their mixtures is emerging to meet this demand, thanks to the recent development in various machine learning methods. High-dimensional spectroscopic or microscopic imaging data can be obtained to identify the bacterial makeup and its implications for human health and the environment. For example, we can classify healthy versus non-healthy skin microbiome, inflammatory versus non-inflammatory gut microbiome, degraded versus non-degraded soil microbiome, etc. This tutorial summarizes the various machine-learning algorithms used in bacteria identification and microbiota determinations. It also summarizes the various fluorescence spectroscopic methods used to identify bacteria and their mixtures, including fluorescence lifetime spectroscopy, fluorescence resonance energy transfer (FRET), and synchronous fluorescence (SF) spectroscopy. Finally, various fluorescence microscopic imaging methods were summarized that have been used to identify bacteria and their mixtures, including epi-fluorescence microscopy, confocal microscopy, two-photon/multi-photon microscopy, and super-resolution imaging methods (STED, SIM, PALM, and STORM). Finally, it discusses how these methods can be applied to microbiota determinations, what can be demonstrated in the future, opportunities and challenges, and future directions.}, }
@article {pmid40322835, year = {2025}, author = {Luo, Z and Lu, X and Zhang, T and Shi, S and Zhao, R and He, Y and Yao, H and Zhu, W and Zhang, C}, title = {Moxibustion Enhances Ovarian Function by Inhibiting the Th17/IL-17 Pathway and Regulating Gut Microbiota in POI Rats.}, journal = {American journal of reproductive immunology (New York, N.Y. : 1989)}, volume = {93}, number = {5}, pages = {e70082}, doi = {10.1111/aji.70082}, pmid = {40322835}, issn = {1600-0897}, support = {BE2020624//Natural Science Foundation of Jiangsu Province/ ; }, mesh = {Animals ; Female ; *Moxibustion/methods ; *Gastrointestinal Microbiome/immunology ; Rats ; *Th17 Cells/immunology ; *Interleukin-17/metabolism ; *Primary Ovarian Insufficiency/therapy/immunology/chemically induced ; Rats, Sprague-Dawley ; *Ovary/physiology ; Signal Transduction ; Disease Models, Animal ; }, abstract = {PROBLEM: Premature ovarian insufficiency (POI) is a significant cause of female infertility, severely impacting physical and mental health. Current treatments, primarily hormone replacement therapy, fail to restore ovarian function and may cause adverse effects. Moxibustion, a traditional Chinese medicine therapy, has shown potential in treating POI, but its mechanisms remain unclear. This study investigated the therapeutic effects of moxibustion on POI rats and explored its underlying mechanisms.<br><br>METHOD OF STUDY: A POI rat model was established using cyclophosphamide, and moxibustion was applied daily to the CV4 and SP6 acupoints for 4 weeks. We analyzed hormone levels, estrous cycles, follicle count, and gut microbiota. Transcriptomic and metagenomic sequencing were performed to identify potential pathways. Network pharmacology was used to predict active components and targets.<br><br>RESULTS: Moxibustion restored estrous cycles, improved hormonal imbalances, and increased ovarian reserve function. Network pharmacology identified five active components in moxa, and based on the results of network pharmacology and transcriptome sequencing, we believe that the regulation of the IL-17 pathway is the key mechanism. Further experiments showed moxibustion downregulated the Th17/IL-17 pathway, reduced key proteins such as IL-17R, NF-&#x3ba;B, MMP3, I&#x3ba;B&#x3b1;, IL-1&#x3b2;, MMP9, TRAF6, and Cox2. Flow cytometry confirmed a decrease in Th17 cell proportion. Gut microbiota analysis revealed that moxibustion enhanced microbial diversity and modulated specific bacterial species, which correlated with improved hormone levels.<br><br>CONCLUSION: Moxibustion has a therapeutic effect on POI rats by regulating the Th17/IL17 pathway and gut microbiota, which provides evidence for the clinical application of moxibustion.}, }
@article {pmid40321823, year = {2025}, author = {Yupanqui García, GJ and Badotti, F and Ferreira-Silva, A and da Cruz Ferraz Dutra, J and Martins-Cunha, K and Gomes, RF and Costa-Rezende, D and Mendes-Pereira, T and Delgado Barrera, C and Drechsler-Santos, ER and Góes-Neto, A}, title = {Microbial diversity of the remote Trindade Island, Brazil: a systematic review.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19305}, pmid = {40321823}, issn = {2167-8359}, mesh = {Brazil ; *Soil Microbiology ; *Biodiversity ; *Bacteria/genetics/classification/isolation &amp; purification ; Islands ; *Fungi/genetics/classification/isolation &amp; purification ; *Archaea/genetics/classification/isolation &amp; purification ; Ecosystem ; *Microbiota ; }, abstract = {Trindade Island is a unique volcanic environment in the South Atlantic, characterized by acidic soils, rich organic matter and a high diversity of micro- and macroorganisms. Such diversity can represent a range of ecological niches and functions, potentially offering valuable ecosystem services. This systematic review aimed to synthesize the current knowledge of the island's microbial communities, focusing on their ecological roles and biotechnological potential. Following the PRISMA guidelines, a comprehensive search of the scientific literature was conducted to identify studies that performed DNA sequencing of samples collected on Trindade Island, Brazil. The selected studies used approaches, such as shotgun metagenomics and marker gene sequencing, including samples from microcosm experiments and culture-dependent samples. A total of eight studies were selected, but only six provided detailed taxonomic information, from which more than 850 genera of Bacteria, Archaea, and Fungi were catalogued. Soil communities were dominated by Actinobacteriota, Acidobacteriota, and Ascomycota (Fungi) while marine and coral environments showed high diversity of Pseudomonadota and Cyanobacteria. Microcosm experiments revealed adaptive responses to hydrocarbon contamination, mainly for Alcanivorax and Mortierella (Fungi). Compared to other ecosystems, such as the oligotrophic Galapagos Islands and the sea-restricted Cuatro Cienegas Basin, Cyanobacteria were shown to be more adaptive.}, }
@article {pmid40320520, year = {2025}, author = {Liu, S and Wu, J and Cheng, Z and Wang, H and Jin, Z and Zhang, X and Zhang, D and Xie, J}, title = {Microbe-mediated stress resistance in plants: the roles played by core and stress-specific microbiota.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {111}, pmid = {40320520}, issn = {2049-2618}, support = {2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2020132607//Forestry and Grassland Science and Technology Innovation Youth Top Talent Project of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 2022YFD2201600, 2022YFD2200602, 2023YFD2200203//Fundamental Research Funds for the National Key R&amp;D Program of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; 32371906, 32022057//Project of the National Natural Science Foundation of China/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; No. B20050//The 111 Project/ ; }, mesh = {*Microbiota/physiology ; *Stress, Physiological ; *Plants/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Soil Microbiology ; Droughts ; }, abstract = {BACKGROUND: Plants in natural surroundings frequently encounter diverse forms of stress, and microbes are known to play a crucial role in assisting plants to withstand these challenges. However, the mining and utilization of plant-associated stress-resistant microbial sub-communities from the complex microbiome remains largely elusive.<br><br>RESULTS: This study was based on the microbial communities over 13 weeks under four treatments (control, drought, salt, and disease) to define the shared core microbiota and stress-specific microbiota. Through co-occurrence network analysis, the dynamic change networks of microbial communities under the four treatments were constructed, revealing distinct change trajectories corresponding to different treatments. Moreover, by simulating species extinction, the impact of the selective removal of microbes on network robustness was quantitatively assessed. It was found that under varying environmental conditions, core microbiota made significant potential contributions to the maintenance of network stability. Our assessment utilizing null and neutral models indicated that the assembly of stress-specific microbiota was predominantly driven by deterministic processes, whereas the assembly of core microbiota was governed by stochastic processes. We also identified the microbiome features from functional perspectives: the shared microbiota tended to enhance the ability of organisms to withstand multiple types of environmental stresses and stress-specific microbial communities were associated with the diverse mechanisms of mitigating specific stresses. Using a culturomic approach, 781 bacterial strains were isolated, and nine strains were selected to construct different SynComs. These experiments confirmed that communities containing stress-specific microbes effectively assist plants in coping with environmental stresses.<br><br>CONCLUSIONS: Collectively, we not only systematically revealed the dynamics variation patterns of rhizosphere microbiome under various stresses, but also sought constancy from the changes, identified the potential contributions of core microbiota and stress-specific microbiota to plant stress tolerance, and ultimately aimed at the beneficial microbial inoculation strategies for plants. Our research provides novel insights into understanding the microbe-mediated stress resistance process in plants. Video Abstract.}, }
@article {pmid40318372, year = {2025}, author = {Chu, D and Zhang, H and Wang, Z and Ning, K}, title = {Microbial resources and interactions across three-dimensional space for a freshwater ecosystem.}, journal = {The Science of the total environment}, volume = {980}, number = {}, pages = {179522}, doi = {10.1016/j.scitotenv.2025.179522}, pmid = {40318372}, issn = {1879-1026}, mesh = {*Ecosystem ; *Fresh Water/microbiology ; China ; *Water Microbiology ; *Microbiota ; Bacteria ; Metagenome ; Lakes/microbiology ; *Environmental Monitoring ; }, abstract = {Freshwater ecosystems are important natural resources but face serious threats. Nevertheless, they host diverse microorganisms crucial for biosynthetic potential and global biochemical cycles. To fully understand the enrichment and interaction of species and functional resources in freshwater ecosystems, it is essential to profile the microbial resources in the whole three-dimensional space. We profiled 131 metagenomic samples to construct the Honghu Microbial Catalog, comprising 2617 metagenome-assembled genomes, 1718 candidate species, over 60 million non-redundant gene clusters, and 7396 biosynthetic gene clusters. We emphasized surface water may be the primary source of microbial species and ARGs for Honghu Lake. We also found the impact of surface water on groundwater had an "influence sphere". Furthermore, we have identified groundwater as a potential refuge for microbial resources, enriched with CPR bacteria and ARGs. These findings are crucial for the understanding, management, and protection of freshwater ecosystems.}, }
@article {pmid40316630, year = {2025}, author = {Aya, V and Pardo-Rodriguez, D and Vega, LC and Cala, MP and Ramírez, JD}, title = {Integrating metagenomics and metabolomics to study the gut microbiome and host relationships in sports across different energy systems.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {15356}, pmid = {40316630}, issn = {2045-2322}, support = {Small grant//Universidad del Rosario/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Metabolomics/methods ; *Metagenomics/methods ; Male ; *Energy Metabolism ; Adult ; Athletes ; Young Adult ; *Sports ; Feces/microbiology ; Female ; Lipidomics ; }, abstract = {The gut microbiome plays a critical role in modulating host metabolism, influencing energy production, nutrient utilization, and overall physiological adaptation. In athletes, these microbial functions may be further specialized to meet the unique metabolic demands of different sports disciplines. This study explored the role of the gut microbiome in modulating host metabolism among Colombian athletes by comparing elite weightlifters (n = 16) and cyclists (n = 13) through integrative omics analysis. Fecal and plasma samples collected one month before an international event underwent metagenomic, metabolomic, and lipidomic profiling. Metagenomic analysis revealed significant microbial pathways, including L-arginine biosynthesis III and fatty acid biosynthesis initiation. Key metabolic pathways, such as phenylalanine, tyrosine, and tryptophan biosynthesis; arginine biosynthesis; and folate biosynthesis, were enriched in both athlete groups. Plasma metabolomics and lipidomics revealed distinct metabolic profiles and a separation between athlete types through multivariate models, with lipid-related pathways such as lipid droplet formation and glycolipid synthesis driving the differences. Notably, elevated carnitine, amino acid, and glycerolipid levels in weightlifters suggest energy system-specific metabolic adaptations. These findings underscore the complex relationship between the gut microbiota composition and metabolic responses tailored to athletic demands, laying the groundwork for personalized strategies to optimize performance. This research highlights the potential for targeted modulation of the gut microbiota as a basis for tailored interventions to support specific energy demands in athletic disciplines.}, }
@article {pmid40315837, year = {2025}, author = {Baker, JS and Qu, E and Mancuso, CP and Tripp, AD and Conwill, A and Lieberman, TD}, title = {Intraspecies dynamics underlie the apparent stability of two important skin microbiome species.}, journal = {Cell host &amp; microbe}, volume = {33}, number = {5}, pages = {643-656.e7}, pmid = {40315837}, issn = {1934-6069}, support = {DP2 GM140922/GM/NIGMS NIH HHS/United States ; }, mesh = {Humans ; *Skin/microbiology ; *Microbiota/genetics ; *Staphylococcus epidermidis/genetics/isolation &amp; purification/classification ; *Propionibacterium acnes/genetics/isolation &amp; purification/classification ; Adult ; Metagenome ; Genome, Bacterial ; Phylogeny ; Male ; Skin Microbiome ; }, abstract = {Adult human facial skin microbiomes are remarkably similar at the species level, dominated by Cutibacterium acnes and Staphylococcus epidermidis, yet each person harbors a unique community of strains. Understanding how person-specific communities assemble is critical for designing microbiome-based therapies. Here, using 4,055 isolate genomes and 356 metagenomes, we reconstruct on-person evolutionary history to reveal on- and between-person strain dynamics. We find that multiple cells are typically involved in transmission, indicating ample opportunity for migration. Despite this accessibility, family members share only some of their strains. S. epidermidis communities are dynamic, with each strain persisting for an average of only 2 years. C. acnes strains are more stable and have a higher colonization rate during the transition to an adult facial skin microbiome, suggesting this window could facilitate engraftment of therapeutic strains. These previously undetectable dynamics may influence the design of microbiome therapeutics and motivate the study of their effects on hosts.}, }
@article {pmid40315739, year = {2025}, author = {Ma, G and Yang, P and Lu, T and Deng, X and Meng, L and Xie, H and Zhou, J and Xiao, X and Tang, X}, title = {Comparative analysis of oral, placental, and gut microbiota characteristics, functional features and microbial networks in healthy pregnant women.}, journal = {Journal of reproductive immunology}, volume = {169}, number = {}, pages = {104535}, doi = {10.1016/j.jri.2025.104535}, pmid = {40315739}, issn = {1872-7603}, mesh = {Humans ; Female ; Pregnancy ; *Placenta/microbiology ; *Gastrointestinal Microbiome ; *Mouth/microbiology ; Adult ; RNA, Ribosomal, 16S/genetics ; *Microbiota ; Young Adult ; *Bacteria/genetics ; }, abstract = {AIM: Most studies on pregnant women focus on analyzing individual microbial species at specific body sites. This study aims to explore the characteristics, functions, and microbial networks of the oral, placental, and gut microbiota in healthy pregnant women.<br><br>METHODS: A total of 23 healthy pregnant women were enrolled in this study. We analyzed the microbial composition, functional profiles, and microbial networks of the oral, placental, and gut microbiota using 16S rRNA gene sequencing.<br><br>RESULTS: Our findings revealed significant differences in microbial composition across these three sites. The placental microbiota contained a relatively high proportion of low-abundance microorganisms, which were more diverse and evenly distributed compared to the gut and oral microbiota. The microbial composition at each site displayed distinct characteristics, likely influenced by environmental, physiological, and biological factors. The placental microbiota exhibited a complex network of tightly interconnected genera, whereas the gut microbiota showed sparser connections, with fewer closely related genera compared to the placental and oral microbiota. Functional differences were also observed among the three microbiota, with each playing a unique role in maintaining host health and metabolic balance. While the oral and gut microbiota shared functional similarities, the placental microbiota exhibited distinct functional characteristics.<br><br>CONCLUSIONS: This study provides valuable insights into the microbial communities of healthy pregnant women, offering important data for microbiological research during pregnancy and laying the foundation for future investigations into the roles of these microbial communities in maternal health.}, }
@article {pmid40315414, year = {2025}, author = {Galperina, A and Lugli, GA and Milani, C and De Vos, WM and Ventura, M and Salonen, A and Hurwitz, B and Ponsero, AJ}, title = {The Aggregated Gut Viral Catalogue (AVrC): A unified resource for exploring the viral diversity of the human gut.}, journal = {PLoS computational biology}, volume = {21}, number = {5}, pages = {e1012268}, pmid = {40315414}, issn = {1553-7358}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Virome/genetics ; *Viruses/genetics/classification ; Computational Biology/methods ; Feces/virology ; Metagenome/genetics ; Infant ; Databases, Genetic ; }, abstract = {The growing interest in the role of the gut virome in human health and disease, has led to several recent large-scale viral catalogue projects mining human gut metagenomes each using varied computational tools and quality control criteria. Importantly, there has been to date no consistent comparison of these catalogues' quality, diversity, and overlap. In this project, we therefore systematically surveyed nine previously published human gut viral catalogues. While these catalogues collectively screened >40,000 human fecal metagenomes, 82% of the recovered 345,613 viral sequences were unique to one catalogue, highlighting limited redundancy between the ressources and suggesting the need for an aggregated resource bringing these viral sequences together. We further expanded these viral catalogues by mining 7,867 infant gut metagenomes from 12 large-scale infant studies collected in 9 different countries. From these datasets, we constructed the Aggregated Gut Viral Catalogue (AVrC), a unified modular resource containing 1,018,941 dereplicated viral sequences (449,859 species-level vOTUs). Using computational inference tools, annotations were obtained for each vOTU representative sequence quality, viral taxonomy, predicted viral lifestyle, and putative host. This project aims to facilitate the reuse of previously published viral catalogues by the research community and follows a modular framework to enable future expansions as novel data becomes available.}, }
@article {pmid40314681, year = {2025}, author = {Li, X and Su, K and He, Y and Shao, S and Lan, L and Zhang, Q and Li, L}, title = {Knowledge Mapping of International Microbiota Research: Analyzing Thirty-Year Citation Classics and Exploring Future Expectations.}, journal = {The new microbiologica}, volume = {48}, number = {1}, pages = {46-59}, pmid = {40314681}, issn = {1121-7138}, mesh = {Humans ; *Bibliometrics ; *Biomedical Research ; Gastrointestinal Microbiome ; *Microbiota ; }, abstract = {Microbiota research has rapidly emerged as a pivotal field, with over 250,000 publications and more than ten million citations recorded in the Web of Science Core Collection database by 2024. There were 1682 original microbiota citation classics (each receiving 400 citations or more) identified over the past three decades, totaling 1,559,594 citations and averaging 927 citations per paper. Collaborative efforts in the production of these citation classics involved 87 out of 89 participating countries and 2107 out of 2142 institutions. The USA, various European countries, and China emerged as the leading contributors to this burgeoning research area. Jeffrey I. Gordon, Rob Knight, and Curtis Huttenhower were the prominent figures in microbiota research. Author keywords were analyzed, which revealed a notable shift in research focus from environmental microorganisms to human gut microbiota. Advances such as high-throughput 16S rRNA sequencing and metagenomics expanded the scope of investigations into host-microbiota interactions. Current research interests encompass exploring mechanisms underlying gut-X-axis conditions, including inflammatory bowel disease, obesity, diabetes, colorectal cancer, liver diseases, and neurological disorders. Moreover, environmental exposures have been evidenced to alter gut microbiota and metabolites, contributing a novel research direction. Future research direction is also anticipated to delve further into biosynthetic gene engineering technologies aimed at microbial interventions, including probiotics and fecal microbiota transplantation. This study outlines the evolving landscape of microbiota research and provides valuable insights to inform future investigations within the field.}, }
@article {pmid40313603, year = {2025}, author = {Pu, Y and Zhou, X and Cai, H and Lou, T and Liu, C and Kong, M and Sun, Z and Wang, Y and Zhang, R and Zhu, Y and Ye, L and Zheng, Y and Zhu, B and Quan, Z and Zhao, G and Zheng, Y}, title = {Impact of DNA Extraction Methods on Gut Microbiome Profiles: A Comparative Metagenomic Study.}, journal = {Phenomics (Cham, Switzerland)}, volume = {5}, number = {1}, pages = {76-90}, pmid = {40313603}, issn = {2730-5848}, abstract = {UNLABELLED: In gut microbial research, DNA extraction remarkably influences study outcomes and biological interpretations. Rapid advancements in the research scale and technological upgrades necessitate evaluating new methods to ensure reliability and precision in microbial community profiling. We systematically evaluated the performance of eight recent and commonly used extraction methods using a microbial mock community (MMC) and fecal samples from two healthy volunteers, incorporating bacterial, archaeal, and fungal constituents. Performance metrics included nucleic acid assessment, microbial profile assessment, and scalability for large-scale studies, leveraging shotgun metagenomics for in-depth analysis. Despite variations in DNA quantity and quality, all methods yielded sufficient DNA for shotgun metagenomic sequencing. In the MMC microbial profile assessment, the QIAamp PowerFecal pro Kit (PF) and DNeasy PowerSoil HTP kit (PS) methods exhibited higher similarity with the theoretical composition and lower variability across technical replicates compared to other methods. For fecal samples, the extraction method accounted for 21.4% of the overall microbiome variation and significantly affected the abundances of 32% of detected microbial species. Methods using mechanical lysis with small beads, such as PF and PS, demonstrated better efficiency, indicated by increased microbial diversity in extracting DNA from Gram-positive bacteria. Furthermore, the PF and PS methods are notably simple to execute and automation-friendly, though relatively costly. Our study underscores the importance of maintaining consistency in DNA extraction methods for reliable comparative metagenomic analyses. We recommend PF and PS methods as optimal for expansive gut metagenomic research, emphasizing the critical role of mechanical lysis in DNA extraction.<br><br>SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s43657-025-00232-x.}, }
@article {pmid40313461, year = {2025}, author = {Bessa, LJ and Egas, C and Pires, C and Proença, L and Mascarenhas, P and Pais, RJ and Barroso, H and Machado, V and Botelho, J and Alcoforado, G and Mendes, JJ and Alves, R}, title = {Linking peri-implantitis to microbiome changes in affected implants, healthy implants, and saliva: a cross-sectional pilot study.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1543100}, pmid = {40313461}, issn = {2235-2988}, mesh = {Humans ; *Peri-Implantitis/microbiology ; *Saliva/microbiology ; Pilot Projects ; Cross-Sectional Studies ; *Microbiota ; *Dental Implants/microbiology ; Male ; Female ; Biofilms/growth &amp; development ; Middle Aged ; *Bacteria/classification/genetics/isolation &amp; purification ; Aged ; Metagenomics ; Adult ; }, abstract = {INTRODUCTION: The rising use of dental implants is accompanied by an expected increase in peri-implant diseases, particularly peri-implantitis (PI), which poses a significant threat to implant success and necessitates a thorough understanding of its pathogenesis for effective management.<br><br>METHODS: To gain deeper insights into the role and impact of the peri-implant microbiome in the pathogenesis and progression of PI, we analyzed 100 samples of saliva and subgingival biofilm from 40 participants with healthy implants (HI group) or with co-occurrence of diagnosed PI-affected implants and healthy implants (PI group) using shotgun metagenomic sequencing. We identified the most discriminative species distinguishing healthy from diseased study groups through log ratios and differential ranking analyses.<br><br>RESULTS AND DISCUSSION: Mogibacterium timidum, Schaalia cardiffensis, Parvimonas micra, Filifactor alocis, Porphyromonas endodontalis, Porphyromonas gingivalis and Olsenella uli were associated with the subgingival peri-implant biofilm. In contrast, Neisseria sp oral taxon 014, Haemophilus parainfluenzae, Actinomyces naeslundii, Rothia mucilaginosa and Rothia aeria were more prevalent in the healthy peri-implant biofilm. Functional pathways such as arginine and polyamine biosynthesis, including putrescine and citrulline biosynthesis, showed stronger correlations with PI-affected implants. In contrast, peri-implant health was characterized by the predominance of pathways involved in purine and pyrimidine deoxyribonucleotide de novo biosynthesis, glucose and glucose-1-phosphate degradation, and tetrapyrrole biosynthesis. Our findings reveal that healthy implants in PI-free oral cavities differ significantly in microbial composition and functional pathways compared to healthy implants co-occurring with PI-affected implants, which more closely resemble PI-associated profiles. This pattern extended to salivary samples, where microbial and functional biomarkers follow similar trends.}, }
@article {pmid40312907, year = {2025}, author = {Zheng, CM and Kang, HW and Moon, S and Byun, YJ and Kim, WT and Choi, YH and Moon, SK and Piao, XM and Yun, SJ}, title = {Optimizing extraction of microbial DNA from urine: Advancing urinary microbiome research in bladder cancer.}, journal = {Investigative and clinical urology}, volume = {66}, number = {3}, pages = {272-280}, pmid = {40312907}, issn = {2466-054X}, support = {2020R1I1A3062508/NRF/National Research Foundation of Korea/Korea ; RS-2023-00245919/NRF/National Research Foundation of Korea/Korea ; RS-2024-00342111/NRF/National Research Foundation of Korea/Korea ; 5199990614277/NRF/National Research Foundation of Korea/Korea ; /KHIDI/Korea Health Industry Development Institute/Korea ; }, mesh = {Humans ; *Microbiota/genetics ; *Urinary Bladder Neoplasms/microbiology/urine ; *DNA, Bacterial/isolation &amp; purification/urine ; Male ; Female ; Middle Aged ; *Urine/microbiology ; Aged ; RNA, Ribosomal, 16S ; Reproducibility of Results ; }, abstract = {PURPOSE: This study aimed to evaluate and optimize microbial DNA extraction methods from urine, a non-invasive sample source, to enhance DNA quality, purity, and reliability for urinary microbiome research and biomarker discovery in bladder cancer.<br><br>MATERIALS AND METHODS: A total of 302 individuals (258 with genitourinary cancers and 44 with benign urologic diseases) participated in this study. Urine samples were collected via sterile catheterization, resulting in 445 vials for microbial analysis. DNA extraction was performed using three protocols: the standard protocol (SP), water dilution protocol (WDP), and chelation-assisted protocol (CAP). DNA quality (concentration, purity, and contamination levels) was assessed using NanoDrop spectrophotometry. Microbial analysis was conducted on 138 samples (108 cancerous and 30 benign) using 16S rRNA sequencing. Prior to sequencing on the Illumina MiSeq platform, Victor 3 fluorometry was used for validation.<br><br>RESULTS: WDP outperformed other methods, achieving significantly higher 260/280 and 260/230 ratios, indicating superior DNA purity and reduced contamination, while maintaining reliable DNA yields. CAP was excluded due to poor performance across all metrics. Microbial abundance was significantly higher in WDP-extracted samples (p<0.0001), whereas SP demonstrated higher alpha diversity indices (p<0.01), likely due to improved detection of low-abundance taxa. Beta diversity analysis showed no significant compositional differences between SP and WDP (p=1.0), supporting the reliability of WDP for microbiome research.<br><br>CONCLUSIONS: WDP is a highly effective and reliable method for microbial DNA extraction from urine, ensuring high-quality and reproducible results. Future research should address sample variability and crystal precipitation to further refine microbiome-based diagnostics and therapeutics.}, }
@article {pmid40311598, year = {2025}, author = {Hong, Y and Cui, J and Xu, G and Li, N and Peng, G}, title = {Intestinal IL-17 family orchestrates microbiota-driven histone deacetylation and promotes Treg differentiation to mediate the alleviation of asthma by Ma-Xing-Shi-Gan decoction.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {142}, number = {}, pages = {156656}, doi = {10.1016/j.phymed.2025.156656}, pmid = {40311598}, issn = {1618-095X}, mesh = {Animals ; *Asthma/drug therapy/microbiology ; *T-Lymphocytes, Regulatory/drug effects ; *Gastrointestinal Microbiome/drug effects ; *Drugs, Chinese Herbal/pharmacology ; Mice, Inbred C57BL ; *Interleukin-17/metabolism/genetics ; Mice ; Histones/metabolism ; Cell Differentiation/drug effects ; Male ; Acetylation ; Disease Models, Animal ; Histone Deacetylases/metabolism ; Lung/drug effects/pathology ; }, abstract = {BACKGROUND: Gut microbiota imbalance is well-known as one important trigger of allergic asthma. Ma-Xing-Shi-Gan decoction (MXSG) is a traditional Chinese medicine prescription with ideal clinical efficacy on asthma. However, whether and how MXSG exerts its efficacy on asthma through gut microbiota remains unclear.<br><br>PURPOSE: To investigate the underlying mechanism of MXSG against asthma using multi-omics technologies.<br><br>METHODS: An asthma model was established using 8-week-old C57BL/6 J mice, after which they were daily administrated with high-, medium- and low-dose MXSG for 7 days. Histopathological examinations and flow cytometry were performed to evaluate the effects of MXSG on lung immune injury. Key regulatory pathways were predicted via network pharmacology and verified using 16S rRNA sequencing, metagenomics, metabolomics, and in vivo experiments including the knockout of the targeting gene.<br><br>RESULTS: MXSG alleviated asthma symptoms, elevated intestinal microbial diversities, and enriched potential beneficial microbes such as Lactococcus, Lactobacillus, and Limosilactobacillus. Network pharmacology and experimental validation highlighted the IL-17/Treg signaling as crucial for asthma treatment. IL-17 knockout experiments revealed its necessity for Treg differentiation during asthma. Moreover, IL-17-deficient asthmatic mice exhibited lower levels of Lactobacillus and significant changes in microbial genes involving histone deacetylases (HDAC) and short-chain fatty acids (SCFAs). Finally, MXSG significantly boosted SCFA production and reduced HDAC9 expression, which were correlated with Treg cell ratios.<br><br>CONCLUSION: Our study delineates a novel mechanism where MXSG synergizes with the IL-17 family to enrich intestinal beneficial microbes (e.g. Lactobacillus) and SCFAs. This inhibits the expression of SCFA-downstream HDAC9 to promote Treg differentiation, and thus potentially alleviates asthma.}, }
@article {pmid40307949, year = {2025}, author = {Lee, JY and Jo, S and Lee, J and Choi, M and Kim, K and Lee, S and Kim, HS and Bae, JW and Chung, SJ}, title = {Distinct gut microbiome characteristics and dynamics in patients with Parkinson's disease based on the presence of premotor rapid-eye movement sleep behavior disorders.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {108}, pmid = {40307949}, issn = {2049-2618}, support = {RS-2024-00353952//Ministry of Science and ICT, South Korea/ ; RS-2023-00265588//the Ministry of Health and Welfare, Republic of Korea/ ; }, mesh = {Humans ; *Parkinson Disease/microbiology/complications ; *Gastrointestinal Microbiome/genetics ; Male ; *REM Sleep Behavior Disorder/microbiology ; Female ; Aged ; Middle Aged ; Disease Progression ; *Bacteria/classification/genetics/isolation &amp; purification ; Feces/microbiology ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Alpha-synuclein aggregation, a hallmark of Parkinson's disease (PD), is hypothesized to often begin in the enteric or peripheral nervous system in "body-first" PD and progresses through the vagus nerve to the brain, therefore REM sleep behavior disorder (RBD) precedes the PD diagnosis. In contrast, "brain-first" PD begins in the central nervous system. Evidence that gut microbiome imbalances observed in PD and idiopathic RBD exhibit similar trends supports body-first and brain-first hypothesis and highlights the role of microbiota in PD pathogenesis. However, further investigation is needed to understand distinct microbiome changes in body-first versus brain-first PD over the disease progression.<br><br>RESULTS: Our investigation involved 104 patients with PD and 85 of their spouses as healthy controls (HC), with 57 patients (54.8%) categorized as PD-RBD(+) and 47 patients (45.2%) as PD-RBD(-) based on RBD presence before the PD diagnosis. We evaluated the microbiome differences between these groups over the disease progression through taxonomic and functional differential abundance analyses and carbohydrate-active enzyme (CAZyme) profiles based on metagenome-assembled genomes. The PD-RBD(+) gut microbiome showed a relatively stable microbiome composition irrespective of disease stage. In contrast, PD-RBD(-) microbiome exhibited a relatively dynamic microbiome change as the disease progressed. In early-stage PD-RBD(+), Escherichia and Akkermansia, associated with pathogenic biofilm formation and host mucin degradation, respectively, were enriched, which was supported by functional analysis. We discovered that genes of the UDP-GlcNAc synthesis/recycling pathway negatively correlated with biofilm formation; this finding was further validated in a separate cohort. Furthermore, fiber intake-associated taxa were decreased in early-stage PD-RBD(+) and the biased mucin-degrading capacity of CAZyme compared to fiber degradation.<br><br>CONCLUSION: We determined that the gut microbiome dynamics in patients with PD according to the disease progression depend on the presence of premotor RBD. Notably, early-stage PD-RBD(+) demonstrated distinct gut microbial characteristics, potentially contributing to exacerbation of PD pathophysiology. This outcome may contribute to the development of new therapeutic strategies targeting the gut microbiome in PD. Video Abstract.}, }
@article {pmid40307838, year = {2025}, author = {Huang, L and Li, K and Peng, C and Gu, S and Huang, X and Gao, C and Ren, X and Cheng, M and He, G and Xu, Y and Jiang, Y and Wang, H and Wang, M and Shen, P and Wang, Q and He, X and Zhong, L and Wang, S and Wang, N and Zhang, G and Cai, H and Jiang, C}, title = {Elevated antibiotic resistance gene abundance of ICU healthcare workers, a multicentre, cross-sectional study.}, journal = {Critical care (London, England)}, volume = {29}, number = {1}, pages = {170}, pmid = {40307838}, issn = {1466-609X}, support = {LTGY24H190001//Zhejiang Provincial Natural Science Fund/ ; 82202356, 82341109, and 82173645//National Natural Science Foundation of China/ ; 82202356, 82341109, and 82173645//National Natural Science Foundation of China/ ; 2021YFA1301001//National Key Research and Development Program/ ; 2025C02090//"Pioneer" and "Leading Goose" R&amp;D Program of Zhejiang/ ; WKJ-ZJ-2526//National Health Commission Scientific Research Fund - Zhejiang Provincial Health Major Science and Technology Plan Project/ ; }, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; China ; Cross-Sectional Studies ; *Drug Resistance, Microbial/genetics ; Feces/microbiology ; Gastrointestinal Microbiome/genetics ; *Health Personnel/statistics &amp; numerical data ; Intensive Care Units/organization &amp; administration/statistics &amp; numerical data ; Prospective Studies ; }, abstract = {OBJECTIVE: Studies suggest that the colonization of multidrug-resistant organism in the gut of healthcare workers is similar to that of healthy individuals. However, due to exposure to medical environments, is the abundance of antibiotic resistance genes (ARG) in the gut of ICU healthcare workers higher than that of healthy individuals?<br><br>DESIGN: Prospective, multicentre, cross-sectional study.<br><br>SETTING: Eight medical centers in China, recruiting from January 2024 to February 2024.<br><br>PARTICIPANTS: 303 Healthy people (201 ICU healthcare workers and 103 healthy controls) were screened and 290 Healthy people (191 ICU healthcare workers and 99 healthy controls) were included in analysis.<br><br>MAIN OUTCOME MEASURES: Fecal samples were collected and subjected to metagenomic sequencing. We compared the total ARG abundance, ARG diversity, and gut microbiome composition between the two groups.<br><br>RESULTS: After adjusting for age, sex, and body mass index, ICU healthcare workers exhibited a significantly higher total ARG abundance compared to healthy controls (fold change&#x2009;=&#x2009;1.22, 95% CI: 1.12-1.34, p <&#x2009;0.001). The &#x3b2;-diversity of ARG between the two groups differed significantly (p =&#x2009;0.001). No significant linear or nonlinear relationship was observed between the duration of ICU occupational exposure and ARG abundance (p for overall&#x2009;=&#x2009;0.96, p for nonlinear&#x2009;=&#x2009;0.84).<br><br>CONCLUSION: In this prospective, multicenter study, we found that ICU healthcare workers exhibit significantly higher gut ARGs abundance compared to healthy controls. Meanwhile, ICU healthcare workers, including physicians, nurses, and nursing assistants, have a different composition of gut ARGs compared to healthy individuals.<br><br>TRIAL REGISTRATION: NCT06228248.}, }
@article {pmid40307239, year = {2025}, author = {Langwig, MV and Koester, F and Martin, C and Zhou, Z and Joye, SB and Reysenbach, AL and Anantharaman, K}, title = {Endemism shapes viral ecology and evolution in globally distributed hydrothermal vent ecosystems.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4076}, pmid = {40307239}, issn = {2041-1723}, support = {DBI-2047598//National Science Foundation (NSF)/ ; OCE-2049478//National Science Foundation (NSF)/ ; }, mesh = {*Hydrothermal Vents/virology/microbiology ; *Viruses/genetics/classification/isolation &amp; purification ; *Ecosystem ; Metagenome ; Genome, Viral ; Pacific Ocean ; Bacteriophages/genetics/classification ; Phylogeny ; Seawater/virology ; Gammaproteobacteria/virology ; Microbiota ; Virome ; }, abstract = {Viruses are ubiquitous in deep-sea hydrothermal vents, where they influence microbial communities and biogeochemistry. Yet, viral ecology and evolution remain understudied in these environments. Here, we identify 49,962 viruses from 52 globally distributed hydrothermal vent samples (10 plume, 40 deposit, and 2 diffuse flow metagenomes), and reconstruct 5708 viral metagenome-assembled genomes, the majority of which were bacteriophages. Hydrothermal viruses were largely endemic, however, some viruses were shared between geographically separated vents, predominantly between the Lau Basin and Brothers Volcano in the Pacific Ocean. Geographically distant viruses shared proteins related to core functions such as structural proteins, and rarely, proteins of auxiliary functions involved in processes such as fermentation and cobalamin biosynthesis. Common microbial hosts of viruses included members of Campylobacterota, Alpha-, and Gammaproteobacteria in deposits, and Gammaproteobacteria in plumes. Campylobacterota- and Gammaproteobacteria-infecting viruses reflected variations in hydrothermal chemistry and functional redundancy in their predicted microbial hosts, suggesting that hydrothermal geology is a driver of viral ecology and coevolution of viruses and hosts. Our results indicate that viral ecology and evolution in globally distributed hydrothermal vents is shaped by endemism and thus may have increased susceptibility to the negative impacts of deep-sea mining and anthropogenic change in ocean ecosystems.}, }
@article {pmid40307209, year = {2025}, author = {Song, X and Wang, Y and Wang, Y and Zhao, K and Tong, D and Gao, R and Lv, X and Kong, D and Ruan, Y and Wang, M and Tang, X and Li, F and Luo, Y and Zhu, Y and Xu, J and Ma, B}, title = {Rhizosphere-triggered viral lysogeny mediates microbial metabolic reprogramming to enhance arsenic oxidation.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {4048}, pmid = {40307209}, issn = {2041-1723}, support = {42277283//National Natural Science Foundation of China (National Science Foundation of China)/ ; 42090060//National Natural Science Foundation of China (National Science Foundation of China)/ ; 41991334//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Rhizosphere ; *Arsenic/metabolism ; Oxidation-Reduction ; *Oryza/microbiology/virology/metabolism ; Soil Microbiology ; *Lysogeny/genetics ; Microbiota/genetics ; Gene Transfer, Horizontal ; Metagenome ; Plant Roots/microbiology/virology ; Oxidoreductases/genetics/metabolism ; Metabolic Reprogramming ; }, abstract = {The rhizosphere is a critical hotspot for metabolic activities involving arsenic (As). While recent studies indicate many functions for soil viruses, much remains overlooked regarding their quantitative impact on rhizosphere processes. Here, we analyze time-series metagenomes of rice (Oryza sativa L.)rhizosphere and bulk soil to explore how viruses mediate rhizosphere As biogeochemistry. We observe the rhizosphere favors lysogeny in viruses associated with As-oxidizing microbes, with a positive correlation between As oxidation and the prevalence of these microbial hosts. Moreover, results demonstrate these lysogenic viruses enrich both As oxidation and phosphorus co-metabolism genes and mediated horizontal gene transfers (HGTs) of As oxidases. In silico simulation with genome-scale metabolic models (GEMs) and in vitro validation with experiments estimate that rhizosphere lysogenic viruses contribute up to 25% of microbial As oxidation. These findings enhance our comprehension of the plant-microbiome-virome interplay and highlight the potential of rhizosphere viruses for improving soil health in sustainable agriculture.}, }
@article {pmid40306604, year = {2025}, author = {Lee, SH and Han, C and Shin, C}, title = {IUPHAR review: Microbiota-gut-brain axis and its role in neuropsychiatric disorders.}, journal = {Pharmacological research}, volume = {216}, number = {}, pages = {107749}, doi = {10.1016/j.phrs.2025.107749}, pmid = {40306604}, issn = {1096-1186}, mesh = {Humans ; *Gastrointestinal Microbiome ; Animals ; *Brain/metabolism/microbiology ; *Mental Disorders/microbiology/therapy ; *Brain-Gut Axis ; Probiotics/therapeutic use ; Prebiotics ; }, abstract = {The human gut microbiome, composed of a vast array of microorganisms that have co-evolved with humans, is crucial for the development and function of brain systems. Research has consistently shown bidirectional communication between the gut and the brain through neuronal, endocrine, and immunological, and chemical pathways. Recent neuroscience studies have linked changes in the microbiome and microbial metabolites to various neuropsychiatric disorders such as autism, depression, anxiety, schizophrenia, eating disorders, and neurocognitive disorders. Novel metagenome-wide association studies have confirmed these microbiome variations in large samples and expanded our understanding of the interactions between human genes and the gut microbiome. The causal relationship between gut microbiota and neuropsychiatric disorders is being elucidated through the establishment of large cohort studies incorporating microbiome data and advanced statistical techniques. Ongoing animal and human studies focused on the microbiota-gut-brain axis are promising for developing new prevention and treatment strategies for neuropsychiatric conditions. The scope of these studies has broadened from microbiome-modulating therapies including prebiotics, probiotics, synbiotics and postbiotics to more extensive approaches such as fecal microbiota transplantation. Recent systematic reviews and meta-analyses have strengthened the evidence base for these innovative treatments. Despite extensive research over the past decade, many intriguing aspects still need to be elucidated regarding the role and therapeutic interventions of the microbiota-gut-brain axis in neuropsychiatric disorders.}, }
@article {pmid40305569, year = {2025}, author = {Hernandez-Valencia, JC and Gómez, GF and Correa, MM}, title = {Metagenomic analysis evidences a core virome in Anopheles darlingi from three contrasting Colombian ecoregions.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0320593}, pmid = {40305569}, issn = {1932-6203}, mesh = {Animals ; *Anopheles/virology ; Colombia ; *Virome/genetics ; *Metagenomics/methods ; *Mosquito Vectors/virology ; Phylogeny ; Malaria/transmission ; Metagenome ; }, abstract = {Anopheles darlingi is a main malaria vector in the neotropical region, but its viral component is not well studied, especially in the neotropics. This work aimed to analyze the virome in Anopheles darlingi from malaria endemic regions of Colombia. Specimens were collected from the Bajo Cauca, Chocoan Pacific and northwestern Amazonas regions and analyzed using an RNA-Seq approach. Results revealed a variety of RNA viral sequences with homology to those of Insect-Specific Viruses belonging to Rhabdoviridae, Partitiviridae, Metaviridae, Tymoviridae, Phasmaviridae, Totiviridae, Ortervirales and Riboviria. Despite geographical and ecological differences among regions, the An. darlingi viral composition remains consistent in different areas, with a core group of viral operational taxonomic units-vOTUs shared by the populations. Furthermore, diversity analysis uncovered greater dissimilarities in viral sequence among mosquitoes from geographically distant regions, particularly evident between populations located at both sides of the Andes Mountain range. This study provides the first characterization of the metavirome in An. darlingi from Colombia and lays the foundation for future research on the complex interactions among viruses, hosts, and microbiota; it also opens a new line of investigation on the viruses in Anopheles populations of Colombia.}, }
@article {pmid40305442, year = {2025}, author = {Cayrou, C and Silver, K and Owen, L and Dunlop, J and Laird, K}, title = {Domestic laundering of healthcare textiles: Disinfection efficacy and risks of antibiotic resistance transmission.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0321467}, pmid = {40305442}, issn = {1932-6203}, mesh = {*Disinfection/methods ; *Textiles/microbiology ; Humans ; *Laundering/methods ; Microbial Sensitivity Tests ; Detergents/pharmacology ; *Cross Infection/prevention &amp; control/microbiology ; *Drug Resistance, Microbial ; Staphylococcus aureus/drug effects/genetics ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial ; United Kingdom ; Microbiota/drug effects ; Decontamination/methods ; Klebsiella pneumoniae/drug effects ; Pseudomonas aeruginosa/drug effects ; Enterococcus faecium/drug effects ; }, abstract = {Hospital-acquired infections (HAIs) and antimicrobial resistance (AMR) are a major public health concern, with the evidence base for the potential role of textiles as fomites in microbial transmission growing. In the UK, domestic laundering machines (DLMs) are commonly used to clean healthcare worker uniforms, raising concerns about their effectiveness in microbial decontamination and role in AMR development. This study aimed to evaluate DLMs' ability to decontaminate microorganisms and their potential impact on AMR. The performance of six DLMs was assessed using Enterococcus faecium bioindicators under various wash cycles and detergent conditions. Shotgun metagenomics was used to analyse the microbiome and resistome of DLMs. The minimum inhibitory concentrations of domestic detergents were determined for Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa, and detergent tolerance and antibiotic cross-resistance were assessed. Results showed only 50% (3/6) of DLMs achieved sufficient decontamination (≥5 log10 CFU reduction) at 60°C during full-length cycles, with rapid cycles performing inconsistently. Microbiome analysis revealed the presence of potentially pathogenic bacteria (e.g., Mycobacterium sp. Pseudomonas sp. and Acinetobacter sp.) and antibiotic resistance genes, including efflux pumps and target modification genes. Detergent tolerance assays showed increased bacterial tolerance to detergents, with cross-resistance to antibiotics observed in S. aureus and K. pneumoniae, including carbapenem and β-lactam groups. Whole genome sequencing identified mutations in genes encoding efflux pumps in S. aureus (MrgA) and K. pneumoniae (AcrB) after detergent exposure, which could impact efflux pump function. Findings suggest domestic laundering of healthcare uniforms may be insufficient for decontamination, posing risks for HAI transmission and AMR. Revising laundering guidelines to ensure effective DLM performance, detergent efficacy, and considering alternatives like onsite/industrial laundering are crucial to enhancing patient safety and controlling AMR in healthcare settings.}, }
@article {pmid40304791, year = {2025}, author = {Bu, Y and Zhang, X and Xiong, Z and Li, K and Zhang, S and Lin, M and Zhao, G and Zheng, N and Wang, J and Zhao, S}, title = {Effect of red clover isoflavones on ruminal microbial composition and fermentation in dairy cows.}, journal = {Applied microbiology and biotechnology}, volume = {109}, number = {1}, pages = {107}, pmid = {40304791}, issn = {1432-0614}, support = {2022YFD1301000//National Key R&amp;D Program of China/ ; CAAS-ZDRW202308//the Agricultural Science and Technology Innovation Program/ ; 2004DA125184G2108//State Key Laboratory of Animal Nutrition and Feeding/ ; }, mesh = {Animals ; Cattle ; *Rumen/microbiology ; *Fermentation/drug effects ; *Isoflavones/pharmacology/administration &amp; dosage/metabolism ; *Trifolium/chemistry ; Genistein/pharmacology/administration &amp; dosage ; *Bacteria/classification/genetics/drug effects/metabolism/isolation &amp; purification ; Female ; Ammonia/metabolism ; Urease/metabolism ; Urea/metabolism ; *Gastrointestinal Microbiome/drug effects ; Animal Feed/analysis ; Metagenomics ; }, abstract = {Red clover isoflavones, particularly biochanin A and formononetin, are known for their benefits in enhancing feed efficiency and nitrogen utilization in ruminants. However, their specific effects on rumen fermentation and microbial diversity remain insufficiently explored. This study investigated the impacts of red clover isoflavones on rumen function and bacterial diversity in dairy cows, utilizing both in vivo and in vitro methodologies. In the in vivo study, 40 Holstein dairy cows were allocated to four groups, each receiving red clover isoflavones at doses of 0, 0.4, 0.8, and 1.6 g/kg. Rumen fluid was collected for analysis of fermentation parameters, enzyme activity, and microbial composition through shotgun metagenomic sequencing. Concurrently, an in vitro rumen fermentation trial was conducted to evaluate the effects of biochanin A and formononetin on urea hydrolysis. Results from the in vivo experiments showed that red clover isoflavones significantly decreased ammonia nitrogen (NH3-N) concentrations and urease activity in the rumen (P < 0.05). Species level metagenomic analysis indicated a reduced abundance of proteolytic and ureolytic bacteria, such as Prevotella sp002317355 and Treponema_D bryantii_C, with a corresponding increase in cellulolytic bacteria, including Ruminococcus_D sp900319075 and Ruminococcus_C sp000433635 (P < 0.05). The in vitro trial further demonstrated that biochanin A and formononetin significantly reduced urea decomposition rates (P < 0.05), with biochanin A exerting a more pronounced effect. These findings align with the observed reduction in ureolytic and proteolytic bacteria, along with an increase in cellulolytic bacteria across both trials. In conclusion, biochanin A emerged as the primary active component of red clover isoflavones, modulating urea nitrogen hydrolysis and rumen fermentation. This study substantiates previous findings and highlights the potential of red clover isoflavones for enhancing rumen microbial fermentation, offering a promising strategy for future dairy industry applications. KEY POINTS: • Red clover isoflavones inhibit urease activity to decrease the abundance of urealytic bacteria. • Biochanin A reduces ammonia nitrogen and urease activity, promoting protein efficiency. • Red clover isoflavones may improve dairy cow rumen health and nitrogen utilization.}, }
@article {pmid40304520, year = {2025}, author = {Flörl, L and Meyer, A and Bokulich, NA}, title = {Exploring sub-species variation in food microbiomes: a roadmap to reveal hidden diversity and functional potential.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {5}, pages = {e0052425}, pmid = {40304520}, issn = {1098-5336}, support = {310030_204275//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (SNF)/ ; 101060247//HORIZON EUROPE European Research Council/ ; 22.00210//Swiss State Secretariat for Education, Research, and Innovation/ ; //Swiss Government Excellence Scholarship/ ; }, mesh = {*Microbiota ; *Food Microbiology ; *Biodiversity ; *Bacteria/genetics/classification/isolation &amp; purification ; Fermented Foods/microbiology ; High-Throughput Nucleotide Sequencing ; }, abstract = {Within-species diversity of microorganisms in food systems significantly shapes community function. While next-generation sequencing (NGS) methods have advanced our understanding of microbiomes at the community level, it is essential to recognize the importance of within-species variation for understanding and predicting the functional activities of these communities. This review highlights the substantial variation observed among microbial species in food systems and its implications for their functionality. We discuss a selection of key species in fermented foods and food systems, highlighting examples of strain-level variation and its influence on quality and safety. We present a comprehensive roadmap of methodologies aimed at uncovering this often overlooked underlying diversity. Technologies like long-read marker-gene or shotgun metagenome sequencing offer enhanced resolution of microbial communities and insights into the functional potential of individual strains and should be integrated with techniques such as metabolomics, metatranscriptomics, and metaproteomics to link strain-level microbial community structure to functional activities. Furthermore, the interactions between viruses and microbes that contribute to strain diversity and community stability are also critical to consider. This article highlights existing research and emphasizes the importance of incorporating within-species diversity in microbial community studies to harness their full potential, advance fundamental science, and foster innovation.}, }
@article {pmid40302838, year = {2025}, author = {Pallen, MJ and Ponsero, AJ and Telatin, A and Moss, CJ and Baker, D and Heavens, D and Davidson, GL}, title = {Faecal metagenomes of great tits and blue tits provide insights into host, diet, pathogens and microbial biodiversity.}, journal = {Access microbiology}, volume = {7}, number = {4}, pages = {}, pmid = {40302838}, issn = {2516-8290}, abstract = {Background. The vertebrate gut microbiome plays crucial roles in host health and disease. However, there is limited information on the microbiomes of wild birds, most of which is restricted to barcode sequences. We therefore explored the use of shotgun metagenomics on the faecal microbiomes of two wild bird species widely used as model organisms in ecological studies: the great tit (Parus major) and the Eurasian blue tit (Cyanistes caeruleus). Results. Short-read sequencing of five faecal samples generated a metagenomic dataset, revealing substantial variation in composition between samples. Reference-based profiling with Kraken2 identified key differences in the ratios of reads assigned to host, diet and microbes. Some samples showed high abundance of potential pathogens, including siadenoviruses, coccidian parasites and the antimicrobial-resistant bacterial species Serratia fonticola. From metagenome assemblies, we obtained complete mitochondrial genomes from the host species and from Isospora spp., while metagenome-assembled genomes documented new prokaryotic species. Conclusions. Here, we have shown the utility of shotgun metagenomics in uncovering microbial diversity beyond what is possible with 16S rRNA gene sequencing. These findings provide a foundation for future hypothesis testing and microbiome manipulation to improve fitness in wild bird populations. The study also highlights the potential role of wild birds in the dissemination of antimicrobial resistance.}, }
@article {pmid40302016, year = {2025}, author = {Zhou, H and Tang, L and Fenton, KA and Song, X}, title = {Exploring and evaluating microbiome resilience in the gut.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40302016}, issn = {1574-6941}, mesh = {*Gastrointestinal Microbiome/physiology ; Humans ; Host Microbial Interactions ; Bacteria/genetics/classification ; Probiotics ; *Gastrointestinal Tract/microbiology ; Animals ; }, abstract = {The gut ecosystem is closely related to human gastrointestinal health and overall wellness. Microbiome resilience refers to the capability of a microbial community to resist or recover from perturbations to its original state of balance. So far, there is no consensus on the criteria for assessing microbiome resilience. This article provides new insights into the metrics and techniques for resilience assessment. We discussed several potential parameters, such as microbiome structure, keystone species, biomarkers, persistence degree, recovery rate, and various research techniques in microbiology, metagenomics, biochemistry, and dynamic modeling. The article further explores the factors that influence the gut microbiome resilience. The microbiome structure (i.e. abundance and diversity), keystone species, and microbe-microbe interplays determine microbiome resilience. Microorganisms employ a variety of mechanisms to achieve the microbiome resilience, including flexible metabolism, quorum sensing, functional redundancy, microbial cooperation, and competition. Host-microbe interactions play a crucial role in maintaining microbiome stability and functionality. Unlike other articles, we focus on the regulation of host immune system on microbiome resilience. The immune system facilitates bacterial preservation and colonization, community construction, probiotic protection, and pathogen elimination through the mechanisms of immunological tolerance, immune-driven microbial compartmentalization, and immune inclusion and exclusion. Microbial immunomodulation indirectly modulates microbiome resilience.}, }
@article {pmid40301729, year = {2025}, author = {Hariprasath, K and Dhanvarsha, M and Mohankumar, S and Sudha, M and Saranya, N and Saminathan, VR and Subramanian, S}, title = {Characterization of gut microbiota in Apis cerana Across different altitudes in the Peninsular India.}, journal = {BMC ecology and evolution}, volume = {25}, number = {1}, pages = {39}, pmid = {40301729}, issn = {2730-7182}, mesh = {Bees/microbiology ; Animals ; *Gastrointestinal Microbiome ; India ; RNA, Ribosomal, 16S/genetics/analysis ; *Altitude ; *Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: Honey bees are vital to global ecosystems and agriculture due to their role as key pollinators. The gut microbiota of honey bees is essential for their health, providing nutrition and protection against pathogens. While extensive research has been conducted on Western honey bees, Less is understood about the gut microbiota of Apis cerana, an economically important species in South Asia. This study aimed to identify and describe the gut microbiota of Apis cerana across different elevations in the Indian peninsula to understand how these bacterial communities adapt to various ecological niches.<br><br>RESULTS: High-throughput metagenome sequencing of the 16S rRNA gene (V1-V9 region) showed that the core microbiota genera in Apis cerana guts across elevations were Gilliamella, Lactobacillus, Snodgrassella, and Frischella. Gilliamella apicola and Lactobacillus kunkeei were identified as the most abundant species. Alpha diversity analysis showed a trend of decreasing species diversity as altitude increased from 200 to 1200&#xa0;m, with a slight increase observed above 1400&#xa0;m. Culturable bacterial species identified through 16S rRNA amplification belonged to the Proteobacteria, Firmicutes, and Actinobacteria phyla. Different elevations harboured distinct bacterial communities, with some species being unique to certain altitudes.<br><br>CONCLUSIONS: This study provides valuable insights into the diversity and adaptations of Apis cerana gut microbiota across various ecological niches in the Indian peninsula. The observed variations in microbial communities at different elevations suggest that environmental factors play a significant role in shaping the gut microbiota of honey bees. Understanding these microbial dynamics could help in developing strategies to improve bee health and address critical questions in host-microbe symbiosis. Furthermore, this research lays the groundwork for future studies on the functional roles of these bacterial communities in Apis cerana and their potential applications in beekeeping practices.}, }
@article {pmid40301728, year = {2025}, author = {Munoz Briones, J and Brubaker, DK}, title = {A framework for predictive modeling of microbiome multi-omics data: latent interacting variable-effects (LIVE) modeling.}, journal = {BMC bioinformatics}, volume = {26}, number = {1}, pages = {115}, pmid = {40301728}, issn = {1471-2105}, support = {R01 HD110367/HD/NICHD NIH HHS/United States ; 2120200//Directorate for Biological Sciences/ ; R01HD110367//National Institute of Child Health and Human Development/ ; }, mesh = {Humans ; *Microbiota ; *Metabolomics/methods ; Gastrointestinal Microbiome ; Metagenomics/methods ; *Computational Biology/methods ; Principal Component Analysis ; Crohn Disease/microbiology ; Multiomics ; }, abstract = {BACKGROUND: The number and size of multi-omics datasets with paired measurements of the host and microbiome is rapidly increasing with the advance of sequencing technologies. As it becomes routine to generate these datasets, computational methods to aid in their interpretation become increasingly important. Here, we present a framework for integration of microbiome multi-omics data: Latent Interacting Variable Effects (LIVE) modeling. LIVE integrates multi-omics data using single-omic latent variables (LV) organized in a structured meta-model to determine the combinations of features most predictive of a phenotype or condition.<br><br>RESULTS: We developed a supervised version of LIVE leveraging sparse Partial Least Squares Discriminant Analysis (sPLS-DA) LVs, and an unsupervised version leveraging sparse Principal Component Analysis (sPCA) principal components which both can incorporate covariate awarness. LIVE performance was tested on publicly available metagenomic and metabolomics data set from Crohn's Disease (CD) and Ulcerative Colitis (UC) status patients in the PRISM and LLDeep cohorts, and benchmarked against existing gut microbiome multi-omics approaches and vaginal microbiome datasests, achieving consistent and comparable performances. In addition to these benchmarking efforts, we present a detailed analysis and interpretation of both versions of LIVE using the PRISM and LLDeep cohorts. LIVE reduced the number of feature interactions from the original datasets for CD and UC from millions to less than 20,000 while conditioning the disease-predictive power of gut microbes, metabolites, enzymes, on clinical variables.<br><br>CONCLUSIONS: LIVE makes a distinct, complementary contribution to current methods to integrate microbiome data and offers key advantages to existing approaches in the interpretable integration of multi-omics data with clinical variables to predict to disease outcomes and identify microbiome mechanisms of disease.}, }
@article {pmid40301726, year = {2025}, author = {Yao, C and Zhang, Y and You, L and E, J and Wang, J}, title = {Comparative analysis of three experimental methods for revealing human fecal microbial diversity.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {258}, pmid = {40301726}, issn = {1471-2180}, support = {2024L154//the Fundamental Research Program of Shanxi Province/ ; 202403021212101//the Science and Technology Innovation Project of Shanxi Provincial Universities/ ; 2018ZD14//the Major Program of Natural Science Foundation of Inner Mongolia/ ; }, mesh = {Humans ; *Feces/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification/growth &amp; development ; *Metagenomics/methods ; *Gastrointestinal Microbiome ; Culture Media/chemistry ; *Biodiversity ; *Bacteriological Techniques/methods ; Sequence Analysis, DNA ; DNA, Bacterial/genetics ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Due to the heterogeneity of the human gut environment, the gut microbiota is complex and diverse, and has been insufficiently explored. In this study, one fresh fecal sample was cultured using 12 commercial or modified media and incubation of culture plates anaerobically and aerobically, the conventional experienced colony picking (ECP) was first used to isolate the colonies and obtain pure culture strains. On this basis, all the colonies grown on the culture plates were collected for culture-enriched metagenomic sequencing (CEMS), and the original sample was also subjected to direct culture-independent metagenomic sequencing (CIMS), the study compared the effects of three methods for analyzing the microbiota contained in the sample. It was found that compared with CEMS, conventional ECP failed to detect a large proportion of strains grown in culture media, resulting in missed detection of culturable microorganisms in the gut. Microbes identified by CEMS and CIMS showed a low degree of overlap (18% of species), whereas species identified by CEMS and CIMS alone accounted for 36.5% and 45.5%, respectively. It suggests that both culture-dependent and culture-independent approaches are essential in revealing gut microbial diversity. Moreover, based on the CEMS results, growth rate index (GRiD) values for various strains on different media were calculated to predict the optimal medium for bacterial growth; this method can be used to design new media for intestinal microbial isolation, promote the recovery of specific microbiota, and obtain new insights into the human microbiome diversity. This is among the first studies on CEMS of the human gut microbiota.}, }
@article {pmid40300605, year = {2025}, author = {Lopez, JA and McKeithen-Mead, S and Shi, H and Nguyen, TH and Huang, KC and Good, BH}, title = {Abundance measurements reveal the balance between lysis and lysogeny in the human gut microbiome.}, journal = {Current biology : CB}, volume = {35}, number = {10}, pages = {2282-2294.e11}, doi = {10.1016/j.cub.2025.03.073}, pmid = {40300605}, issn = {1879-0445}, mesh = {*Gastrointestinal Microbiome/physiology ; Humans ; *Bacteriophages/physiology/genetics ; *Lysogeny ; Mice ; Animals ; *Bacteria/virology/genetics ; *Virome ; }, abstract = {The human gut contains diverse communities of bacteriophage, whose interactions with the broader microbiome and potential roles in human health are only beginning to be uncovered. Here, we combine multiple types of data to quantitatively estimate gut phage population dynamics and lifestyle characteristics in human subjects. Unifying results from previous studies, we show that an average human gut contains a low ratio of phage particles to bacterial cells (∼1:100) but a much larger ratio of phage genomes to bacterial genomes (∼4:1), implying that most gut phage are effectively temperate (e.g., integrated prophage and phage-plasmids). By integrating imaging and sequencing data with a generalized model of temperate phage dynamics, we estimate that phage induction and lysis occur at a low average rate (∼0.001-0.01 per bacterium per day), imposing only a modest fitness burden on their bacterial hosts. Consistent with these estimates, we find that the phage composition of a diverse synthetic community in gnotobiotic mice can be quantitatively predicted from bacterial abundances alone while still exhibiting phage diversity comparable to native human microbiomes. These results provide a foundation for interpreting existing and future studies on links between the gut virome and human health.}, }
@article {pmid40298543, year = {2025}, author = {Bisaccia, M and Berini, F and Marinelli, F and Binda, E}, title = {Emerging Trends in Antimicrobial Resistance in Polar Aquatic Ecosystems.}, journal = {Antibiotics (Basel, Switzerland)}, volume = {14}, number = {4}, pages = {}, pmid = {40298543}, issn = {2079-6382}, support = {PNRA16_00105//Italian Ministry of Education, University and Research/ ; CMPT228810//Consorzio Interuniversitario per le Biotecnologie &amp; Italian Ministry of Education, University and Research/ ; IBFM NBFC CN00000033//National Biodiversity Future Center/ ; PNRA22_0000040//Italian Ministry of Education, University and Research/ ; }, abstract = {The global spread of antimicrobial resistance (AMR) threatens to plummet society back to the pre-antibiotic era through a resurgence of common everyday infections' morbidity. Thus, studies investigating antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARB) in urban, agricultural, and clinical settings, as well as in extreme environments, have become increasingly relevant in the One Health perspective. Since the Antarctic and Arctic regions are considered amongst the few remaining pristine environments on Earth, the characterization of their native resistome appears to be of the utmost importance to understand whether and how it is evolving as a result of anthropogenic activities and climate change. In the present review, we report on the phenotypic (e.g., disk diffusion test) and genotypic (e.g., PCR, metagenomics) approaches used to study AMR in the aquatic environment of polar regions, as water represents one of AMR main dissemination routes in nature. Their advantages and limits are described, and the emerging trends resulting from the analysis of ARB and ARGs diffusion in polar waters discussed. The resistome detected in these extreme environments appears to be mostly comparable to those from more anthropized areas, with the predominance of tetracycline, β-lactam, and sulfonamide resistance (and related ARGs). Indeed, AMR is, in all cases, more consistently highlighted in sites impacted by human and wildlife activities with respect to more pristine ones. Surprisingly, aminoglycoside and fluroquinolone determinants seem to have an even higher incidence in the Antarctic and Arctic aquatic environment compared to that from other areas of the world, corroborating the need for a more thorough AMR surveillance in these regions.}, }
@article {pmid40298412, year = {2025}, author = {Majernik, SN and Beaver, L and Bradley, PH}, title = {Small amounts of misassembly can have disproportionate effects on pangenome-based metagenomic analyses.}, journal = {mSphere}, volume = {10}, number = {5}, pages = {e0085724}, pmid = {40298412}, issn = {2379-5042}, support = {R35 GM151155/GM/NIGMS NIH HHS/United States ; R35GM151155/NH/NIH HHS/United States ; }, mesh = {*Metagenomics/methods ; Humans ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; Case-Control Studies ; Liver Cirrhosis/microbiology ; Genome, Bacterial ; }, abstract = {Individual genes from microbiomes can drive host-level phenotypes. To help identify such candidate genes, several recent tools estimate microbial gene copy numbers directly from metagenomes. These tools rely on alignments to pangenomes, which, in turn, are derived from the set of all individual genomes from one species. While large-scale metagenomic assembly efforts have made pangenome estimates more complete, mixed communities can also introduce contamination into assemblies, and it is unknown how robust pangenome-based metagenomic analyses are to these errors. To gain insight into this problem, we re-analyzed a case-control study of the gut microbiome in cirrhosis, focusing on commensal Clostridia previously implicated in this disease. We tested for differentially prevalent genes in the Lachnospiraceae and then investigated which were likely to be contaminants using sequence similarity searches. Out of 86 differentially prevalent genes, we found that 33 (38%) were probably contaminants originating in taxa such as Veillonella and Haemophilus, unrelated genera that were independently correlated with disease status. Our results demonstrate that even small amounts of contamination in metagenome assemblies, below typical quality thresholds, can threaten to overwhelm gene-level metagenomic analyses. However, we also show that such contaminants can be accurately identified using a method based on gene-to-species correlation. After removing these contaminants, we observe that several flagellar motility gene clusters in the Lachnospira eligens pangenome are associated with cirrhosis status. We have integrated our analyses into an analysis and visualization pipeline, PanSweep, that can automatically identify cases where pangenome contamination may bias the results of gene-resolved analyses.IMPORTANCEMetagenome-assembled genomes, or MAGs, can be constructed without pure cultures of microbes. Large-scale efforts to build MAGs have yielded more complete pangenomes (i.e., sets of all genes found in one species). Pangenomes allow us to measure strain variation in gene content, which can strongly affect phenotype. However, because MAGs come from mixed communities, they can contaminate pangenomes with unrelated DNA; how much this impacts downstream analyses has not been studied. Using a metagenomic study of gut microbes in cirrhosis as our test case, we investigate how contamination affects analyses of microbial gene content. Surprisingly, even small, typical amounts of MAG contamination (<5%) result in disproportionately high levels of false positive associations (38%). Fortunately, we show that most contaminants can be automatically flagged and provide a simple method for doing so. Furthermore, applying this method reveals a new association between cirrhosis and gut microbial motility.}, }
@article {pmid40298386, year = {2025}, author = {Chen, Z and Zhang, Z and Nie, BN and Huang, W and Zhu, Y and Zhang, L and Xu, M and Wang, M and Yuan, C and Liu, N and Wang, X and Tian, J and Ba, Q and Wang, Z}, title = {Temporal network analysis of gut microbiota unveils aging trajectories associated with colon cancer.}, journal = {mSystems}, volume = {10}, number = {5}, pages = {e0118824}, pmid = {40298386}, issn = {2379-5077}, support = {2022YQ066//Shanghai Municipal Health Commission/ ; 82304777//National Natural Science Foundation of China/ ; 23YF1442800//Science and Technology Innovation Plan Of Shanghai Science and Technology Commission/ ; WL-HBQN-2021004K,WL-QNPY-2022004K//Shanghai Medical Innovation and Development Foundation/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Middle Aged ; *Aging ; Aged ; *Colonic Neoplasms/microbiology ; Adult ; Feces/microbiology ; Metagenomics/methods ; Case-Control Studies ; Colorectal Neoplasms/microbiology ; }, abstract = {UNLABELLED: The human gut microbiome's role in colorectal cancer (CRC) pathogenesis has gained increasing recognition. This study aimed to delineate the microbiome characteristics that distinguish CRC patients from healthy individuals, while also evaluating the influence of aging, through a comprehensive metagenomic approach. The study analyzed a cohort of 80 CRC patients and 80 matched healthy controls, dividing participants into a normal and a CRC group, further categorized by age into young, middle-aged, and old-aged subgroups. Extensive metagenomic sequencing of fecal samples allowed for the exploration of both the structural and functional profiles of the microbiome, with findings validated in an independent cohort to ensure robustness. Our results highlight notable differences in microbiome composition between CRC patients and healthy individuals, which exhibit age-dependent variations. Specifically, a higher prevalence of pathogenic bacteria, such as Bacteroides vulgatus, known to drive inflammation and carcinogenesis, was observed in CRC patients, alongside a reduction in beneficial microbes, including Lactobacillus. Functionally, the CRC-associated microbiome showed an increase in pathways related to DNA repair, cell cycle regulation, and metabolic activities, such as the Citrate cycle and Galactose metabolism, underscoring distinct microbial alterations in CRC patients that could influence disease onset and progression. These insights lay a foundation for future research into microbiome-based diagnostics and treatments for CRC.<br><br>IMPORTANCE: This study underscores the critical role of the gut microbiome in colorectal cancer (CRC) pathogenesis, particularly in the context of aging. By identifying age-specific microbial biomarkers and functional pathways associated with CRC, our findings provide novel insights into how microbiome composition and metabolic activities influence disease progression. These discoveries pave the way for developing personalized microbiome-based diagnostic tools and therapeutic strategies, potentially improving CRC prevention and treatment outcomes across different age groups. Understanding these microbial dynamics could also inform interventions targeting gut microbiota to mitigate CRC risk and progression.}, }
@article {pmid40298367, year = {2025}, author = {Zhou, Z and Ma, Y and Zhang, D and Ji, R and Wang, Y and Zhao, J and Ma, C and Zhu, H and Shen, H and Jiang, X and Niu, Y and Lu, J and Zhang, B and Tu, L and Zhang, H and Ma, X and Chen, P}, title = {Microbiome and fragmentation pattern of blood cell-free DNA and fecal metagenome enhance colorectal cancer micro-dysbiosis and diagnosis analysis: a proof-of-concept study.}, journal = {mSystems}, volume = {10}, number = {5}, pages = {e0027625}, pmid = {40298367}, issn = {2379-5077}, support = {24ZDFA001//Gansu Provincial Science and Technology Major Project/ ; 2024-8-27,2024-8-30,2024-4-2//The Lanzhou Municipal Science and Technology Program/ ; 20240260001,20240260017//The College Students' Innovation and Entrepreneurship Program of Lanzhou University, China/ ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology/diagnosis/blood ; *Feces/microbiology ; Male ; Female ; *Metagenome/genetics ; Middle Aged ; *Dysbiosis/microbiology/diagnosis/blood ; *Cell-Free Nucleic Acids/blood ; Gastrointestinal Microbiome/genetics ; Adenoma/microbiology/diagnosis/blood ; Proof of Concept Study ; Aged ; Adult ; *Microbiota/genetics ; }, abstract = {Colorectal cancer (CRC) is the third most common cancer, and it can be prevented by performing early screening. As a hallmark of cancer, the human microbiome plays important roles in the occurrence and development of CRC. Recently, the blood microbiome has been proposed as an effective diagnostic tool for various diseases, yet its performance on CRC deserves further exploration. In this study, 133 human feces and 120 blood samples are collected, including healthy individuals, adenoma patients, and CRC patients. The blood cfDNA and fecal genome are subjected to shotgun metagenome sequencing. After removing human sequences, the microbial sequences in blood are analyzed. Based on the differential microbes and functions, random forest (RF) models are constructed for adenoma and CRC diagnosis. The results show that alterations of blood microbial signatures can be captured under low coverage (even at 3×). RF diagnostic models based on blood microbial markers achieve high area under the curve (AUC) values for adenoma patients (0.8849) and CRC patients (0.9824). When the fragmentation pattern is combined with microbial and KEGG markers, higher AUC values are obtained. Furthermore, compared to the blood microbiome, the fecal microbiome shows a different community composition, whereas their changes in KEGG pathways are similar. Pathogenic bacteria Fusobacterium nucleatum (F. nucleatum) in feces increased gradually from the healthy group to the adenoma and CRC groups. Additionally, F. nucleatum in feces and blood shows a positive correlation in CRC patients. Cumulatively, the integration of blood microbiome and fragmentation pattern is promising for CRC diagnosis.IMPORTANCEThe cell-free DNA of the human microbiome can enter the blood and can be used for cancer diagnosis, whereas its diagnostic potential in colorectal cancer and association with gut microbiome has not been explored. The microbial sequences in blood account for less than 1% of the total sequences. The blood microbial composition, KEGG functions, and fragmentation pattern are different among healthy individuals, adenoma patients, and CRC patients. Machine learning models based on these differential characteristics achieve high diagnostic accuracy, especially when they are integrated with fragmentation patterns. The great difference between fecal and blood microbiomes indicates that microbial sequences in blood may originate from various organs. Therefore, this study provides new insights into the community composition and functions of the blood microbiome of CRC and proposes an effective non-invasive diagnostic tool.}, }
@article {pmid40297591, year = {2025}, author = {Pei, X and Liu, L and Han, Y}, title = {Advances in human microbiome and prostate cancer research.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1576679}, pmid = {40297591}, issn = {1664-3224}, mesh = {Humans ; *Prostatic Neoplasms/microbiology/therapy/immunology/metabolism/etiology ; Male ; *Microbiota ; *Gastrointestinal Microbiome ; Tumor Microenvironment/immunology ; Animals ; }, abstract = {Prostate cancer (PCa) is the second most common malignant tumor in men worldwide, and its metastatic and heterogeneous nature makes it significantly more difficult to treat. Recent studies have revealed the critical role of microbiota in PCa occurrence, progression, and treatment. Accumulating evidence from 16S rRNA and metagenomic sequencing suggests the presence of specific microbiota in prostate tissues and macrogenomics techniques: cancerous tissues are enriched with pro-inflammatory genera (e.g., Fusobacterium, Propionibacterium acnes), whereas commensal bacteria (e.g., Pseudomonas) are more common in paracancerous tissues. The microbiota drive tumor progression through activation of the NF-κB/STAT3 pathway to induce chronic inflammation, modulation of the immune microenvironment (e.g., Treg/Th17 imbalance and M2-type macrophage polarization), and metabolite (e.g., LPS, short-chain fatty acids)-mediated hormonal and epigenetic regulation. In terms of clinical translation, urinary microbiota characterization combined with metabolomics analysis may enhance diagnostic specificity, while gut flora modulation (e.g., probiotic interventions or fecal transplants) may improve resistance to androgen deprivation therapy. Current challenges include sequencing accuracy of low-biomass samples, limitations of causal mechanism validation models, and large cohort heterogeneity. In the future, it will be necessary to integrate multi-omics technologies to explore the bidirectional regulation of the "gut-prostate axis" and develop personalized therapeutic strategies targeting microorganisms. In this paper, we systematically review the interactions between microbiota and PCa and their clinical potentials to provide a theoretical basis for precision diagnosis and treatment.}, }
@article {pmid40297587, year = {2025}, author = {Dora, D and Revisnyei, P and Pasic, A and Galffy, G and Dulka, E and Mihucz, A and Roskó, B and Szincsak, S and Iliuk, A and Weiss, GJ and Lohinai, Z}, title = {Host and bacterial urine proteomics might predict treatment outcomes for immunotherapy in advanced non-small cell lung cancer patients.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1543817}, pmid = {40297587}, issn = {1664-3224}, mesh = {Humans ; *Carcinoma, Non-Small-Cell Lung/urine/drug therapy/therapy/microbiology/immunology ; Male ; Female ; *Lung Neoplasms/urine/drug therapy/therapy/microbiology/immunology ; Middle Aged ; *Proteomics/methods ; Aged ; Immunotherapy/methods ; Treatment Outcome ; *Proteome ; Biomarkers, Tumor/urine ; Gastrointestinal Microbiome ; Immune Checkpoint Inhibitors/therapeutic use ; }, abstract = {INTRODUCTION: Urine samples are non-invasive approaches to study potential circulating biomarkers from the host organism. Specific proteins cross the bloodstream through the intestinal barrier and may also derive from gut microbiota. In this study, we aimed to evaluate the predictive role of the host and bacterial urine extracellular vesicle (EV) proteomes in patients with non-small cell lung cancer (NSCLC) treated with anti-PD1 immunotherapy.<br><br>METHODS: We analyzed the urine EV proteome of 33 advanced-stage NSCLC patients treated with anti-PD1 immunotherapy with LC-MS/MS, stratifying patients according to long (>6 months) and short (&#x2264;6 months) progression-free survival (PFS). Gut microbial communities on a subcohort of 23 patients were also analyzed with shotgun metagenomics. Internal validation was performed using the Random Forest (RF) machine learning (ML) algorithm. RF was validated with a non-linear Bayesian ML model. Gene enrichment, and pathway analysis of host urine proteins were analyzed using the Reactome and Gene Ontology databases.<br><br>RESULTS: We identified human (n=3513), bacterial (n=2647), fungal (n=19), and viral (n=4) proteins. 186 human proteins showed differential abundance (p<0.05) according to PFS groups, 101 being significantly more abundant in patients with short PFS and n=85 in patients with long PFS. We found several pathways that were significantly enriched in patients with short PFS (vs long PFS). Multivariate Cox regression showed that human urine proteins MPP5, IGKV6-21, NT5E, and KRT27 were strongly associated with long PFS, and LMAN2, NUTF2, NID1, TNC, IGF1, BCR, GPHN, and PPBP showed the strongest association with short PFS. We revealed that an increased bacterial/host protein ratio in the urine is more frequent in patients with long PFS. Increased abundance of E. coli and E. faecalis proteins in the urine positively correlates with their gut metagenomic abundance. RF ML model supported the reliability in predicting PFS for critical human urine proteins (AUC=0.89), accuracy (95%) and Bacterial proteins (AUC=0.74).<br><br>CONCLUSION: To our knowledge, this is the first study to depict the predictive role of the host and bacterial urine proteome in anti-PD1-treated advanced NSCLC.}, }
@article {pmid40297467, year = {2025}, author = {Deep, A and Sieber, G and Boden, L and David, GM and Baikova, D and Buchner, D and Starke, J and Stach, TL and Reinders, T and Hadžiomerović, U and Beszteri, S and Probst, AJ and Boenigk, J and Beisser, D}, title = {A metatranscriptomic exploration of fungal and bacterial contributions to allochthonous leaf litter decomposition in the streambed.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19120}, pmid = {40297467}, issn = {2167-8359}, mesh = {*Plant Leaves/metabolism/microbiology ; *Bacteria/genetics/metabolism ; *Fungi/genetics/metabolism ; *Rivers/microbiology ; Ecosystem ; Alnus ; Transcriptome ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The decomposition of organic matter is essential for sustaining the health of freshwater ecosystems by enabling nutrient recycling, sustaining food webs, and shaping habitat conditions, which collectively enhance ecosystem resilience and productivity. Bacteria and fungi play a crucial role in this process by breaking down coarse particulate organic matter (CPOM), such as leaf litter, into nutrients available for other organisms. However, the specific contribution of bacteria and their functional interactions with fungi in freshwater sediments have yet to be thoroughly explored. In the following study, we enriched organic matter through the addition of alder (Alnus glutinosa) leaves into artificial stream channels (AquaFlow mesocosms). We then investigated enzyme expression, metabolic pathways, and community composition of fungi and bacteria involved in the degradation of CPOM through metatranscriptomics and amplicon sequencing. Enzymes involved in the degradation of lignin, cellulose, and hemicellulose were selectively upregulated with increased organic matter. Analysis of ITS and 16S rRNA gene sequences revealed that during decomposition, fungal communities were predominantly composed of Basidiomycota and Ascomycota, while bacterial communities were largely dominated by Pseudomonadota and Bacteroidota. The similar gene expression patterns of CPOM degradation related enzymes observed between bacteria and fungi indicate potential functional interaction between these microbial groups. This correlation in enzyme expression may indicate that bacteria and fungi are jointly involved in the breakdown of coarse particulate organic matter, potentially through mutualistic interaction. This study uncovers the specific enzymatic activities of bacteria and fungi and the importance of microbial interactions in organic matter decomposition, revealing their central role in facilitating nutrient cycling and maintaining the ecological health and stability of freshwater ecosystems.}, }
@article {pmid40297464, year = {2025}, author = {Zhang, Y and Ding, G and Gao, Y and Li, Y and Zhou, P and Wu, L and Zhou, M and Wang, J and Tang, J}, title = {Distribution status and influencing factors of antibiotic resistance genes in the Chaohu Lake, China.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19384}, pmid = {40297464}, issn = {2167-8359}, mesh = {*Lakes/microbiology/chemistry ; China ; *Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents/pharmacology ; *Genes, Bacterial ; Microbiota/genetics ; *Drug Resistance, Bacterial/genetics ; }, abstract = {BACKGROUND: Chaohu Lake (CL) is one of the most polluted areas in China due to its high content of antibiotics. However, the distribution and influencing factors of antibiotic resistance genes (ARGs) in this lake are still controversial.<br><br>METHODS: To solve this problem, we used metagenomic sequencing to investigate the distribution and in-fluencing factors of ARGs in CL.<br><br>RESULTS: Our findings revealed the existence of nine kinds of ARGs, including 45 specific genes. The most abundant types were multidrug, bacitracin, polymyxin, macrolide lincosamide streptogramin, and aminoglycoside. Multiple microorganisms were undeniable ARG reservoirs, although they were not dominant species in the microbiota. Our results also showed that both the microbiota and physiochemical factors played important roles in shaping the distributions of ARGs in CL. Specifically, the levels of PO4-P (0.5927) and total phosphorus (0.4971) had a greater impact than total nitrogen (0.0515), NO3-N (0.0352), NO2-N (-0.1975), and NH3-N (-0.0952).<br><br>CONCLUSIONS: These findings provide valuable insights into the distribution and influencing factors of ARGs in lakes.}, }
@article {pmid40296156, year = {2025}, author = {Fan, Y and Wang, D and Yang, JX and Ning, D and He, Z and Zhang, P and Rocha, AM and Xiao, N and Michael, JP and Walker, KF and Joyner, DC and Pan, C and Adams, MWW and Fields, MW and Alm, EJ and Stahl, DA and Hazen, TC and Adams, PD and Arkin, AP and Zhou, J}, title = {Modest functional diversity decline and pronounced composition shifts of microbial communities in a mixed waste-contaminated aquifer.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {106}, pmid = {40296156}, issn = {2049-2618}, support = {DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; DE-AC02-05CH11231//ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies; http://enigma.lbl.gov)/ ; }, mesh = {*Groundwater/microbiology/chemistry ; Phylogeny ; *Microbiota/genetics ; Tennessee ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Nitrates/analysis ; Water Pollutants, Chemical/analysis ; Biodiversity ; RNA, Ribosomal, 16S/genetics ; Metals, Heavy/analysis ; }, abstract = {BACKGROUND: Microbial taxonomic diversity declines with increased environmental stress. Yet, few studies have explored whether phylogenetic and functional diversities track taxonomic diversity along the stress gradient. Here, we investigated microbial communities within an aquifer in Oak Ridge, Tennessee, USA, which is characterized by a broad spectrum of stressors, including extremely high levels of nitrate, heavy metals like cadmium and chromium, radionuclides such as uranium, and extremely low pH (< 3).<br><br>RESULTS: Both taxonomic and phylogenetic &#x3b1;-diversities were reduced in the most impacted wells, while the decline in functional &#x3b1;-diversity was modest and statistically insignificant, indicating a more robust buffering capacity to environmental stress. Differences in functional gene composition (i.e., functional &#x3b2;-diversity) were pronounced in highly contaminated wells, while convergent functional gene composition was observed in uncontaminated wells. The relative abundances of most carbon degradation genes were decreased in contaminated wells, but genes associated with denitrification, adenylylsulfate reduction, and sulfite reduction were increased. Compared to taxonomic and phylogenetic compositions, environmental variables played a more significant role in shaping functional gene composition, suggesting that niche selection could be more closely related to microbial functionality than taxonomy.<br><br>CONCLUSIONS: Overall, we demonstrated that despite a reduced taxonomic &#x3b1;-diversity, microbial communities under stress maintained functionality underpinned by environmental selection. Video Abstract.}, }
@article {pmid40295121, year = {2025}, author = {Scheffer, G and Rattray, J and Evans, P and Shi, W and Bhatnagar, S and Hubert, CRJ}, title = {Nitrate-reducing microorganisms prevent souring of an oil field produced water storage pond.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40295121}, issn = {1574-6941}, support = {//Natural Sciences and Engineering Research Council of Canada/ ; //University of Calgary/ ; }, mesh = {*Nitrates/metabolism ; *Ponds/microbiology/chemistry ; *Oil and Gas Fields/microbiology ; Sulfates/metabolism ; *Bacteria/metabolism/genetics/classification ; *Water Microbiology ; Oxidation-Reduction ; Sulfides/metabolism ; Nitrites/metabolism ; Microbiota ; }, abstract = {Nitrate addition for mitigating sulfide production in oil field systems has been studied in laboratory settings and in some subsurface oil reservoirs. To promote water recycling and reuse associated with oil reservoirs produced by hydraulic fracturing, high-salinity produced waters are temporarily stored in surface ponds prior to subsequent reinjection into the subsurface. In this study, nitrate was added directly to a storage pond to prevent sulfide accumulation. DNA sequencing of pond water over a 4-week period revealed a decrease in the proportion of sulfate-reducing microorganisms following nitrate application. Sulfate levels remained stable during this period, whereas nitrate and nitrite fluctuated in the days following the nitrate addition. Metagenome-assembled genomes (MAGs) reconstructed from the pond water microbiome highlighted different organisms with genes for organoheterotrophic and lithoheterotrophic nitrate reduction, whereas genes associated with sulfide production via sulfate or thiosulfate reduction were barely detected. Within those MAGs, genes for acetate metabolism were observed, consistent with acetate decreasing substantially in the pond water in the presence of nitrate. After nitrate was consumed an increase in relative abundance of putative autotrophic microorganisms was observed (e.g. Arhodomonas, Guyparkeria, and Psychroflexus), corresponding to a drop in total inorganic carbon measurements in the storage pond. This trial offers an overview on microbial processes taking place in storage pond environments in response to nitrate addition.}, }
@article {pmid40294758, year = {2025}, author = {Thangadurai, T and Dobretsov, S and Aeby, G}, title = {Exploring bacterial diversity in Acropora pharaonis: Implications for coral health and growth anomalies.}, journal = {Microbial pathogenesis}, volume = {205}, number = {}, pages = {107616}, doi = {10.1016/j.micpath.2025.107616}, pmid = {40294758}, issn = {1096-1208}, mesh = {*Anthozoa/microbiology/growth &amp; development ; Animals ; *Bacteria/classification/genetics/isolation &amp; purification ; *Biodiversity ; Microbiota ; RNA, Ribosomal, 16S/genetics ; Seasons ; Phylogeny ; }, abstract = {Coral growth anomalies (GA) affect many coral genera across the world, yet the etiology of GAs remains unknown, with limited knowledge of associated bacteria. In this study, we investigated bacterial associations between the growth anomalies (GAs) and healthy (H) portions of coral colonies in Acropora faraonis for two seasons to understand microbial dynamics. Additionally, we examined bacteria in water (W), which could be affecting coral bacterial communities. We found that alpha diversity remained consistent between healthy and GA coral tissues, but their relative abundances differed significantly. Notably, differential analysis revealed the abundance of Endozoicomonas spp., differed significantly between GA and H tissue, although it remains the dominant genus in both GA and H tissue. The high relative abundance of Endozoicomonas spp. in both GA and healthy tissue underscores its potential role in maintaining coral health. Structural modifications in GAs, such as changes in polyp sizes or densities, could be responsible for these differences in bacterial abundance. Similarly, microbial community composition remained consistent between seasons but differed in abundance again. We found differences between microbial communities of GAs and water, but no significant differences were observed between GAs and H, and no previously established bacterial pathogens were detected in GA tissue. These findings describe bacterial community patterns in GAs, but their potential role in its pathogenesis remains unknown. Further metagenomic and meta-transcriptomic analyses are needed to understand potential bacterial involvement in GAs. Additionally, investigating viruses and fungi in GA tissue is recommended to gain deeper insights into GA pathogenesis.}, }
@article {pmid40294554, year = {2025}, author = {Zeng, H and Yang, H and Fu, Z and Ma, L and Lu, L and Zeng, T and Xiao, Y and Lyu, W}, title = {Integrated 16S rRNA and metagenomic sequencing reveals the distribution of key antibiotic resistance genes in duck gut microbiota.}, journal = {Poultry science}, volume = {104}, number = {7}, pages = {105206}, pmid = {40294554}, issn = {1525-3171}, mesh = {Animals ; *Ducks/microbiology ; *Gastrointestinal Microbiome/genetics ; RNA, Ribosomal, 16S/analysis/genetics ; Metagenomics ; *Bacteria/genetics/drug effects/isolation &amp; purification ; *Drug Resistance, Microbial/genetics ; RNA, Bacterial/analysis ; }, abstract = {The duck gut microbiota is essential for host health and is considered a potential reservoir for antibiotic resistance genes (ARGs). However, research on ARGs in the duck gut microbiota is limited. This study collected 120 intestinal content samples from five segments (duodenum, jejunum, ileum, cecum, and colorectum) of ducks raised under two rearing conditions (with or without an open-air swimming pool). We compiled a comprehensive inventory of microbial genes in the duck gut and conducted an analysis of microbial composition and function across all intestinal segments using 16S rRNA gene sequencing combined with metagenomics. The findings revealed that Firmicutes were the most prevalent microbes in all intestinal segments. In the foregut (duodenum, jejunum, and ileum), microbial functions were mainly related to genetic information processing such as transcription, translation, replication, and glycosynthesis/gluconeogenesis. Conversely, in the hindgut (cecum and colorectum), microbial functions were primarily associated with the biosynthesis of secondary metabolites and various metabolic pathways. The analysis of ARGs indicated a higher relative abundance of ARGs in the cecum and colorectum (P < 0.05) of ducks in the presence of an open-air swimming pool compared to the absence of one. Furthermore, through co-occurrence network analysis, we identified Bacteroides, Roseburia, Ruminococcus, and Blautia as potential hosts of ARGs such as tetQ, tet32, tet37, vanR, vanG, and acrB in the hindgut. This study provides new insights into the complex relationship between ARGs and the microbial community in duck intestines, laying a theoretical groundwork for understanding the transmission dynamics of ARGs in these ecosystems.}, }
@article {pmid40293591, year = {2025}, author = {Orlova, EA and Sinkov, VV and Ogarkov, OB and Suzdalnitsky, AE and Kondratov, IG and Zhdanova, SN and Rychkova, LV and Kolesnikova, LI}, title = {Metagenomic Analysis of Caseum of Tuberculosis Foci.}, journal = {Bulletin of experimental biology and medicine}, volume = {178}, number = {5}, pages = {610-614}, pmid = {40293591}, issn = {1573-8221}, mesh = {Humans ; *Mycobacterium tuberculosis/genetics/isolation &amp; purification/classification ; Metagenomics/methods ; *Tuberculoma/microbiology/pathology ; Male ; *Microbiota/genetics ; Lung/microbiology/pathology ; Female ; Middle Aged ; Adult ; Genome, Bacterial/genetics ; }, abstract = {The microbiota of the deep lung regions significantly differs from that of the upper respiratory tract by much lower biomass and dynamic diversity. In our previous studies we found that the biodiversity of the satellite microbiota of tuberculosis foci is sharply reduced in comparison with intact lung tissues. These findings allowed us to classify microbial communities in the caseous necrosis of tuberculomas into two types: (i) mycobacterial caseoma (tuberculoma), where 70% or more of the genomes correspond to Mycobacterium tuberculosis, and (ii) a polymicrobial community, where the concentration of M. tuberculosis varies from 0 to 10%. Using shotgun metagenomic sequencing, 14 tuberculomas from 13 patients were analyzed on a NextSeq 550 platform (Illumina). Taxonomic classification of short reads was performed using Kraken 2. The results show that, on average, 99.95% of the short reads belonged to human DNA or were unclassified. However, the classified reads related to bacterial genomes confirmed the concept that in many cases, tuberculomas contained polymicrobial communities that either replaced or supplemented the original mycobacterial microbiota of the caseous material.}, }
@article {pmid40289251, year = {2025}, author = {Slager, J and Simpson, HL and Gacesa, R and Chen, L and Tan, IL and Gelderloos, J and Maatman, A and Wijmenga, C and Zhernakova, A and Fu, J and Weersma, RK and Gonera, G and Jonkers, IH and Withoff, S}, title = {High-resolution analysis of the treated coeliac disease microbiome reveals strain-level variation.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2489071}, pmid = {40289251}, issn = {1949-0984}, mesh = {Humans ; *Celiac Disease/microbiology/diet therapy ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Feces/microbiology ; Middle Aged ; Adult ; Netherlands ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Aged ; }, abstract = {BACKGROUND: Coeliac disease (CeD) is an immune-mediated disorder primarily affecting the small intestine, characterized by an inflammatory immune reaction to dietary gluten. CeD onset results from a multifaceted interplay of genetic and environmental factors. While recent data show that alterations in gut microbiome composition could play an important role, many current studies are constrained by small sample sizes and limited resolution.<br><br>METHODS: To address these limitations, we analyzed fecal gut microbiota from two Dutch cohorts, CeDNN (128 treated CeD patients (tCeD), 106 controls) and the Lifelines Dutch Microbiome Project (24 self-reported tCeD, 654 controls), using shotgun metagenomic sequencing. Self-reported IBS (570 cases, 1710 controls) and IBD (93 cases, 465 controls) were used as comparative conditions of the gastrointestinal tract. Interindividual variation within the case and control groups was calculated at whole microbiome and strain level. Finally, species-specific gene repertoires were analyzed in tCeD patients and controls.<br><br>RESULTS: Within-individual microbiome diversity was decreased in patients with self-reported IBS and IBD but not in tCeD patients. Each condition displayed a unique microbial pattern and, in addition to confirming previously reported microbiome associations, we identify an increase in the levels of Clostridium sp. CAG:253, Roseburia hominis, and Eggerthella lenta, amongst others. We further show that the observed changes can partially be explained by gluten-free diet adherence. We also observe increased interindividual variation of gut microbiome composition among tCeD patients and a higher bacterial mutation frequency in tCeD that contributes to higher interindividual variation at strain level. In addition, the immotile European subspecies of Eubacterium rectale, which has a distinct carbohydrate metabolism potential, was nearly absent in tCeD patients.<br><br>CONCLUSION: Our study sheds light on the complex interplay between the gut microbiome and CeD, revealing increased interindividual variation and strain-level variation in tCeD patients. These findings expand our understanding of the microbiome's role in intestinal health and disease.}, }
@article {pmid40289152, year = {2025}, author = {Jarrige, D and Tardy, V and Loux, V and Rué, O and Chabbi, A and Terrat, S and Maron, PA}, title = {Metagenomics reveals contrasted responses of microbial communities to wheat straw amendment in cropland and grassland soils.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {14723}, pmid = {40289152}, issn = {2045-2322}, support = {ANR-20-PAMR-0004//Agence Nationale de la Recherche/ ; }, mesh = {*Soil Microbiology ; *Triticum ; *Metagenomics/methods ; *Microbiota/genetics ; *Grassland ; Bacteria/genetics/classification ; Soil/chemistry ; Crops, Agricultural ; High-Throughput Nucleotide Sequencing ; }, abstract = {Soil microbial communities respond quickly to natural and/or anthropic-induced changes in environmental conditions. Metagenomics allows studying taxa that are often overlooked in microbiota studies, such as protists or viruses. Here, we employed metagenomics to characterise microbial successions after wheat straw input in a 4-month in-situ field study. We compared microbial successions patterns with those obtained by high throughput amplicon sequencing on the same soil samples to validate metagenomics as a tool for the fine analysis of microbial population dynamics in situ. Taxonomic patterns were concordant between the two methodologies but metagenomics allowed studying all the microbial groups simultaneously. Notably, our results evidenced that each domain displayed a specific dynamic pattern after wheat straw amendment. For instance, viral sequences multiplied in the early phase of straw decomposition, in parallel to copiotrophic bacteria, suggesting a "kill-the-winner" pattern that, to our knowledge, had not been observed before in soil. Altogether, our results highlighted that both inter and intra-domain trophic interactions were impacted by wheat amendment and these patterns depended on the land use history. Our study highlights that top-down regulation by microbial predators or viruses might play a key role in soil microbiota dynamics and structure.}, }
@article {pmid40289138, year = {2025}, author = {Weathers, SP and Li, X and Zhu, H and Damania, AV and Knafl, M and McKinley, B and Lin, H and Harrison, RA and Majd, NK and O'Brien, BJ and Penas-Prado, M and Loghin, M and Kamiya-Matsuoka, C and Yung, WKA and Solis Soto, LM and Maru, DM and Wistuba, I and Parra Cuentas, ER and Hernandez, S and Futreal, A and Wargo, JA and Schulze, K and Darbonne, WC and Ajami, NJ and Woodman, SE and de Groot, JF}, title = {Improved overall survival in an anti-PD-L1 treated cohort of newly diagnosed glioblastoma patients is associated with distinct immune, mutation, and gut microbiome features: a single arm prospective phase I/II trial.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {3950}, pmid = {40289138}, issn = {2041-1723}, mesh = {Humans ; *Glioblastoma/genetics/immunology/mortality/therapy/drug therapy ; *Gastrointestinal Microbiome/genetics/drug effects ; Male ; Female ; Middle Aged ; *Brain Neoplasms/genetics/immunology/mortality/therapy/drug therapy ; Temozolomide/therapeutic use/administration &amp; dosage ; Antibodies, Monoclonal, Humanized/therapeutic use/administration &amp; dosage ; Mutation ; Aged ; Adult ; *B7-H1 Antigen/antagonists &amp; inhibitors ; Tumor Microenvironment ; Prospective Studies ; *Immune Checkpoint Inhibitors/therapeutic use ; Treatment Outcome ; }, abstract = {This phase I/II trial aims to evaluate the efficacy of concurrent atezolizumab with radiation therapy and temozolomide (TMZ) followed by adjuvant atezolizumab and TMZ in newly diagnosed glioblastoma (GBM) patients and to identify pre-treatment correlates with outcome (N = 60). Trial number: NCT03174197. The primary outcome was overall survival (OS) whereas secondary outcomes were retrospective global-omics analyses to identify pre-treatment immune and genetic tumor features that correlated with survival. Concurrent use of atezolizumab with radiation and TMZ demonstrated OS in line with published trials for newly diagnosed GBM. Tumor genomic (WES and/or targeted NGS panel), transcriptomic (RNAseq) and tissue microenvironment imaging, as well as fecal metagenomic sequencing were conducted. Gene set enrichment analysis of tumors identified multiple immune-based transcriptomic programs to distinguish patients with longer versus shorter survival (p ≤ 0.01). GBM immune enrichment was highly associated with the pre-treatment tumor mesenchymal subtype and patient gastrointestinal bacterial taxa profile.}, }
@article {pmid40289100, year = {2025}, author = {Mok, K and Tomtong, P and Ogawa, T and Nagai, K and Torrungruang, P and Charoensiddhi, S and Nakayama, J and Wanikorn, B and Nitisinprasert, S and Vongsangnak, W and Nakphaichit, M}, title = {Synbiotic-driven modulation of the gut microbiota and metabolic functions related to obesity: insights from a human gastrointestinal model.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {250}, pmid = {40289100}, issn = {1471-2180}, support = {FF(KU)51.67//Kasetsart University Research and Development Institute (KURDI) under the research topic "Center for Microbiota Innovation: Empowering Health via Probiotics, Prebiotics, Postbiotics, and Functional Products"/ ; FF(KU)51.67//Kasetsart University Research and Development Institute (KURDI) under the research topic "Center for Microbiota Innovation: Empowering Health via Probiotics, Prebiotics, Postbiotics, and Functional Products"/ ; FF(KU)51.67//Kasetsart University Research and Development Institute (KURDI) under the research topic "Center for Microbiota Innovation: Empowering Health via Probiotics, Prebiotics, Postbiotics, and Functional Products"/ ; }, mesh = {Humans ; *Synbiotics/administration &amp; dosage ; *Obesity/microbiology/metabolism ; *Gastrointestinal Tract/microbiology/metabolism ; Feces/microbiology ; Limosilactobacillus reuteri/growth &amp; development ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Microbial Viability ; Adult ; Male ; *Gastrointestinal Microbiome ; Female ; }, abstract = {Synbiotic interventions have gained increasing attention for modulating gut microbiota and metabolic functions in obesity-related disorders. This study evaluated the effects of Limosilactobacillus reuteri KUB-AC5 (10[8] CFU) and Wolffia globosa powder (6 g/day) using an in vitro continuous human gastrointestinal model. Fecal samples from obese donors were used to simulate the ascending and descending colon, with microbial viability, diversity, and metabolite production assessed over 14 days via culture-dependent and culture-independent methods. Synbiotic supplementation increased anaerobic bacterial counts by 2.6 log CFU/mL in the ascending colon and 2.2 log CFU/mL in the descending colon, with notable increases in lactic acid bacteria and reductions in Enterobacteriaceae. Metagenomic analysis revealed an increasing trend in microbial diversity and evenness after 7 days of treatment, though the changes were not statistically significant. PERMANOVA analysis confirmed significant shift in microbial community composition between stabilization, treatment, and washout periods (p < 0.05). Additionally, butyrate levels significantly increased (p < 0.05), while p-cresol, a deleterious metabolite, significantly decreased (p < 0.05). Bile acid composition was modulated, with increased tertiary bile acid 3-oxo-LCA and enhanced bile acid deconjugation, suggesting improved lipid metabolism and potential weight management benefits. These findings highlight the potential of synbiotic supplementation to enhance beneficial bacterial populations, improve microbial diversity, and support metabolic health in obesity management.}, }
@article {pmid40289092, year = {2025}, author = {Qiu, J and Hu, P and Li, F and Huang, Y and Yang, Y and Sun, F and Wu, P and Lai, Y and Wang, Y and He, X and Dong, Y and Zhang, P and Zhang, S and Wu, N and Wang, T and Yang, S and Li, S and Yuan, J and Liu, X and Liu, G and Hu, Y and Wu, JHY and Chen, D and Pan, A and Pan, XF}, title = {Circulating linoleic acid and its interplay with gut microbiota during pregnancy for gestational diabetes mellitus.}, journal = {BMC medicine}, volume = {23}, number = {1}, pages = {245}, pmid = {40289092}, issn = {1741-7015}, support = {2022YFC2702905//National Key R&amp;D Program of China/ ; 82325043//the National Science Fund for Distinguished Young Scholars/ ; 82473646//Natural Science Foundation of China/ ; 2024NSFSC0578//Sichuan Provincial Natural Science Foundation/ ; YJ202346//Fundamental Research Funds for the Central Universities/ ; }, mesh = {Humans ; Pregnancy ; Female ; *Diabetes, Gestational/blood/microbiology ; *Gastrointestinal Microbiome/physiology ; Adult ; Case-Control Studies ; *Linoleic Acid/blood ; China/epidemiology ; Mendelian Randomization Analysis ; }, abstract = {BACKGROUND: Circulating linoleic acid (LA) levels have been reported to be associated with various metabolic outcomes. However, the role of LA and its interplay with gut microbiota in gestational diabetes mellitus (GDM) remains unclear. This study aimed to investigate the longitudinal association between circulating LA levels during pregnancy and the risk of GDM, and the potential role of gut microbiota.<br><br>METHODS: A nested case-control study was conducted within the ongoing Tongji-Huaxi-Shuangliu Birth Cohort in Chengdu, China. Blood and fecal samples were collected during early and middle pregnancy from 807 participants. GDM was diagnosed in middle pregnancy using the International Association of Diabetes and Pregnancy Study Groups criteria. Plasma LA levels were measured using gas chromatography-mass spectrometry, and gut microbiota was analyzed through 16S rRNA gene sequencing and shotgun metagenomic sequencing. A two-sample Mendelian randomization study was conducted using data from the IEU OpenGWAS database and the FinnGen consortium.<br><br>RESULTS: Elevated plasma LA levels were associated with a lower risk of GDM in both early (P for trend&#x2009;=&#x2009;0.002) and middle pregnancy (P for trend&#x2009;=&#x2009;0.02). Consistently, Mendelian randomization analysis revealed that each unit increase in LA was associated with a 16% reduction in GDM risk (odds ratio: 0.84, 95% confidence interval: 0.72, 0.95). In early pregnancy, higher plasma LA levels were correlated with higher adiponectin&#xa0;levels (P&#x2009;<&#x2009;0.001) and lower levels of triglycerides (P&#x2009;<&#x2009;0.001), HbA1c (P&#x2009;=&#x2009;0.04), and C-peptide (P&#x2009;=&#x2009;0.04). The LA-accociated microbiota mediated the relationship between LA and C-peptide (P&#x2009;=&#x2009;0.01). Additionally, the inverse association between LA and GDM was modified by Bilophila&#xa0;(P for interaction&#x2009;=&#x2009;0.03), with a stronger association observed in participants with lower Bilophila levels in early pregnancy. Metagenomic analyses further showed that&#xa0;the LA-associated pathway (D-galacturonate degradation I) and its key enzyme (EC 4.2.1.7) were associated with metabolic traits.<br><br>CONCLUSIONS: Our study provides evidence for an inverse causal association between plasma LA levels during pregnancy and GDM risk, which is both mediated and modified by gut microbiota.}, }
@article {pmid40288073, year = {2025}, author = {Song, Y and Baniakina, LFT and Jiang, L and Chai, L}, title = {Metagenomic insights into the alterations of gut microbial community in Bufo gargarizans tadpoles following lead exposure.}, journal = {Comparative biochemistry and physiology. Part D, Genomics &amp; proteomics}, volume = {55}, number = {}, pages = {101522}, doi = {10.1016/j.cbd.2025.101522}, pmid = {40288073}, issn = {1878-0407}, mesh = {Animals ; *Larva/microbiology/drug effects ; *Gastrointestinal Microbiome/drug effects ; *Lead/toxicity ; Metagenomics ; *Bufonidae/microbiology/growth &amp; development ; *Water Pollutants, Chemical/toxicity ; }, abstract = {Lead (Pb), a prevalent heavy metal contaminant in aquatic environments, has complex effects on the gut microbiome function of aquatic animals. In this study, metagenomic analysis of Bufo gargarizans tadpoles was carried out following Pb exposure. Moreover, histological analysis was performed on the intestines. The results showed that Pb exposure induced histological damage to the intestinal epithelium. Significant differences in microbial abundance and function were detected in the 200 μg/L Pb group compared to the control group. Specifically, an increase in Bosea and Klebsiella was noted at 200 μg/L Pb, which potentially could induce inflammation in tadpoles. Notably, the decrease in the abundance of glycoside hydrolases subsequent to exposure to 200 μg/L Pb is likely to attenuate carbohydrate metabolism. Furthermore, increased fluoroquinolone-related antibiotic resistance genes (ARGs), phenolic-related ARGs, and iron uptake systems following 200 μg/L Pb exposure might heighten the disease risk for tadpoles. These discoveries augment our comprehension of the influences of Pb on the intestinal well-being of amphibians and offer valuable insights for further assessment of the ecological risks that Pb poses to amphibians.}, }
@article {pmid40287775, year = {2025}, author = {Ren, H and Hong, H and Zha, B and Lamlom, SF and Qiu, H and Cao, Y and Sun, R and Wang, H and Ma, J and Zhang, H and Sun, L and Yang, Q and Zhou, C and Liu, X and Wang, X and Zhang, C and Zhang, F and Zhao, K and Yuan, R and Abdelghany, AM and Zhang, B and Zheng, Y and Wang, J and Lu, W}, title = {Soybean productivity can be enhanced by understanding rhizosphere microbiota: evidence from metagenomics analysis from diverse agroecosystems.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {105}, pmid = {40287775}, issn = {2049-2618}, mesh = {*Rhizosphere ; *Metagenomics/methods ; *Soil Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Glycine max/microbiology/growth &amp; development ; *Microbiota/genetics ; China ; Fungi/classification/genetics/isolation &amp; purification ; Plant Roots/microbiology ; Archaea/classification/genetics/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; }, abstract = {BACKGROUND: Microbial communities associated with roots play a crucial role in the growth and health of plants and are constantly influenced by plant development and alterations in the soil environment. Despite extensive rhizosphere microbiome research, studies examining multi-kingdom microbial variation across large-scale agricultural gradients remain limited.<br><br>RESULTS: This study investigates the rhizosphere microbial communities associated with soybean across 13 diverse geographical locations in China. Using high-throughput shotgun metagenomic sequencing on the BGISEQ T7 platform with 10 GB per sample, we identified a total of 43,337 microbial species encompassing bacteria, archaea, fungi, and viruses. Our analysis revealed significant site-specific variations in microbial diversity and community composition, underscoring the influence of local environmental factors on microbial ecology. Principal coordinate analysis (PCoA) indicated distinct clustering patterns of microbial communities, reflecting the unique environmental conditions and agricultural practices of each location. Network analysis identified 556 hub microbial taxa significantly correlated with soybean yield traits, with bacteria showing the strongest associations. These key microorganisms were found to be involved in critical nutrient cycling pathways, particularly in carbon oxidation, nitrogen fixation, phosphorus solubilization, and sulfur metabolism. Our findings demonstrate the pivotal roles of specific microbial taxa in enhancing nutrient cycling, promoting plant health, and improving soybean yield, with significant positive correlations (r&#x2009;= 0.5, p&#x2009;= 0.039) between microbial diversity and seed yield.<br><br>CONCLUSION: This study provides a comprehensive understanding of the diversity and functional potential of rhizosphere microbiota in enhancing soybean productivity. The findings underscore the importance of integrating microbial community dynamics into crop management strategies to optimize nutrient cycling, plant health, and yield. While this study identifies key microbial taxa with potential functional roles, future research should focus on isolating and validating these microorganisms for their bioremediation and biofertilization activities under field conditions. This will provide actionable insights for developing microbial-based agricultural interventions to improve crop resilience and sustainability. Video Abstract.}, }
@article {pmid40287646, year = {2025}, author = {He, L and Zou, Q and Wang, Y}, title = {metaTP: a meta-transcriptome data analysis pipeline with integrated automated workflows.}, journal = {BMC bioinformatics}, volume = {26}, number = {1}, pages = {111}, pmid = {40287646}, issn = {1471-2105}, support = {62102269//National Natural Science Foundation of China/ ; }, mesh = {*Metagenomics/methods ; Computational Biology/methods ; *Software ; *Gene Expression Profiling/methods ; *Microbiota ; Data Collection ; Quality Control ; Workflow ; RNA, Untranslated ; Molecular Sequence Annotation ; Rhizosphere ; Automation ; }, abstract = {BACKGROUND: The accessibility of sequencing technologies has enabled meta-transcriptomic studies to provide a deeper understanding of microbial ecology at the transcriptional level. Analyzing omics data involves multiple steps that require the use of various bioinformatics tools. With the increasing availability of public microbiome datasets, conducting meta-analyses can reveal new insights into microbiome activity. However, the reproducibility of data is often compromised due to variations in processing methods for sample omics data. Therefore, it is essential to develop efficient analytical workflows that ensure repeatability, reproducibility, and the traceability of results in microbiome research.<br><br>RESULTS: We developed metaTP, a pipeline that integrates bioinformatics tools for analyzing meta-transcriptomic data comprehensively. The pipeline includes quality control, non-coding RNA removal, transcript expression quantification, differential gene expression analysis, functional annotation, and co-expression network analysis. To quantify mRNA expression, we rely on reference indexes built using protein-coding sequences, which help overcome the limitations of database analysis. Additionally, metaTP provides a function for calculating the topological properties of gene co-expression networks, offering an intuitive explanation for correlated gene sets in high-dimensional datasets. The use of metaTP is anticipated to support researchers in addressing microbiota-related biological inquiries and improving the accessibility and interpretation of microbiota RNA-Seq data.<br><br>CONCLUSIONS: We have created a conda package to integrate the tools into our pipeline, making it a flexible and versatile tool for handling meta-transcriptomic sequencing data. The metaTP pipeline is freely available at: https://github.com/nanbei45/metaTP .}, }
@article {pmid40287117, year = {2025}, author = {Lu, W and Liu, Z and Song, Z and Wang, C and Yu, Z and Peng, S and Tian, Z and Lyu, A and Ning, Z}, title = {Vinegar-processed frankincense ameliorates ulcerative colitis by targeting BSH-active bacteria preference-mediated GDCA hydrolysis.}, journal = {Journal of ethnopharmacology}, volume = {348}, number = {}, pages = {119845}, doi = {10.1016/j.jep.2025.119845}, pmid = {40287117}, issn = {1872-7573}, mesh = {*Colitis, Ulcerative/drug therapy/chemically induced/microbiology ; Animals ; Mice ; *Acetic Acid/chemistry/pharmacology ; Hydrolysis ; Male ; *Amidohydrolases/metabolism ; Gastrointestinal Microbiome/drug effects ; Disease Models, Animal ; Dextran Sulfate ; Mice, Inbred C57BL ; Bacteria/drug effects ; }, abstract = {Frankincense, is extensively used in both traditional Chinese medicine (TCM) and Indian practices for the treatment of ulcerative colitis (UC). In TCM, it is typically subjected to process with vinegar, which is believed to enhance its therapeutic efficacy. However, the underlying mechanism has yet to be elucidated.<br><br>AIM OF THE STUDY: To elucidate the underlying mechanism of frankincense vinegar processing from the perspective of bile salt hydrolase (BSH)-active bacteria preference and glycodeoxycholic acid (GDCA) hydrolysis.<br><br>MATERIALS AND METHODS: Dextran sodium sulfate (DSS)-induced UC model was used to elucidate the superior improving effects of vinegar-processed frankincense (PF). 16S rRNA and metagenomic sequencing along with ultra-high performance liquid chromatography-triple quadrupole mass spectroscopy (UHPLC-TQ-MS) were employed to reveal the differential bacteria and its related disturbance of GDCA. The effects of PF and GDCA on BSH-active bacteria were confirmed using real-time quantitative polymerase chain reaction (RT-qPCR) and in vitro experiments. Finally, the pro-inflammatory effects of GDCA and the mechanisms by which PF ameliorates UC were verified by establishing a UC pseudo-sterile mice model with GDCA intervention.<br><br>RESULTS: PF exhibited remarkable mitigating effects on UC (P&#xa0;<&#xa0;0.05 or P&#xa0;<&#xa0;0.01). Specifically, PF enhanced the BSH activity of Bifidobacterium longum and Lactobacillus acidophilus (P&#xa0;<&#xa0;0.01), thereby promoting their dissociation efficiency toward glycine-conjugated bile acids (G-CBAs), particularly GDCA (P&#xa0;<&#xa0;0.01). Furthermore, PF reduced GDCA levels by regulating the dissociation efficiency of Bifidobacterium longum and Lactobacillus acidophilus toward GDCA, thereby alleviating GDCA-induced exacerbation of UC.<br><br>CONCLUSION: PF exhibits its superior amelioration effects on UC by enhancing the dissociation efficiency of Bifidobacteruum longum and Lactobacillus acidophilus towards G-CBAs, particularly GDCA.}, }
@article {pmid40286059, year = {2025}, author = {Men, C and Pan, Z and Liu, J and Miao, S and Yuan, X and Zhang, Y and Yang, N and Cheng, S and Li, Z and Zuo, J}, title = {Single and Combined Effects of Aged Polyethylene Microplastics and Cadmium on Nitrogen Species in Stormwater Filtration Systems: Perspectives from Treatment Efficiency, Key Microbial Communities, and Nitrogen Cycling Functional Genes.}, journal = {Molecules (Basel, Switzerland)}, volume = {30}, number = {7}, pages = {}, pmid = {40286059}, issn = {1420-3049}, support = {52400245//National Natural Science Foundation of China/ ; 2017ZX07103-007//National Key Research and Development Program of China/ ; 5221101156//National Natural Science Foundation of China/ ; }, mesh = {*Cadmium/chemistry ; *Microplastics/chemistry ; *Nitrogen Cycle/genetics/drug effects ; *Water Pollutants, Chemical ; *Nitrogen ; Filtration ; *Polyethylene/chemistry ; *Microbiota/drug effects ; Denitrification ; Water Purification/methods ; }, abstract = {Microplastics and heavy metal contamination frequently co-occur in stormwater filtration systems, where their interactions may potentially compromise nitrogen removal. Current research on microplastics and Cd contamination predominantly focuses on soils and constructed wetlands, with limited attention given to stormwater filtration systems. In this study, the single and synergistic effects of aged polyethylene microplastics (PE) and cadmium (Cd) contamination in stormwater infiltration systems were investigated from perspectives of nitrogen removal, microbial community structures, and predicted functional genes in nitrogen cycling. Results showed that PE single contamination demonstrated stronger inhibition on NO3[-]-N removal than Cd. Low-level PE contamination (PE content: 0.1% w/w) in Cd-contaminated systems showed stronger inhibitory effect than high-level PE contamination (PE content: 5% w/w). The mean NO3[-]-N removal efficiency under combined Cd50 (Cd concentration: 50 μg/L) and PE5 contamination during the sixth rainstorm event was 1.04 to 34.68 times that under other contamination scenarios. Metagenomic analysis identified keystone genera (Saccharimonadales, Enterobacter, Aeromonas, etc.), and critical nitrogen transformation pathways (nitrate reduction to ammonium, denitrification, nitrogen fixation, and nitrification) govern system performance. PE and Cd contamination effects were most pronounced on nitrification/denitrification enzymes beyond nitrite oxidase and nitrate reductase. These mechanistic findings advance our understanding of co-contaminant interactions in stormwater filtration systems.}, }
@article {pmid40285778, year = {2025}, author = {Alotaib, AS and Anwar, W and Albalawi, HQ and Albalawi, HS and Alshehri, MA and Al-Atawi, FM and Al Joundi, IT and Y Al Samini, A and Alqarni, RZ and Alzahrani, NE and Huraysi, MA}, title = {Metagenomic analysis microbial biodiversity of Trojena' the Mountains of Neom.}, journal = {Cellular and molecular biology (Noisy-le-Grand, France)}, volume = {71}, number = {4}, pages = {100-110}, doi = {10.14715/cmb/2025.71.4.13}, pmid = {40285778}, issn = {1165-158X}, mesh = {*Metagenomics/methods ; *Biodiversity ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification ; Saudi Arabia ; Soil Microbiology ; *Metagenome/genetics ; Phylogeny ; High-Throughput Nucleotide Sequencing ; Microbiota/genetics ; }, abstract = {About 80% of the biosphere is constantly exposed to temperatures below 5 °C in cold environments. Microorganisms in cold environments can grow and decompose various organic compounds at sub-zero temperatures despite exposure to conditions that are harmful to their survival, such as sub-zero temperatures and low nutrient and water availability. The present study was designed to investigate metagenomic insights into the microbial diversity in (Al-Lawz Mountains / Trojena Mountains) Saudi Arabia. Metagenomic data sets are obtained by high-throughput sequencing of environmental soil samples and provide an aggregation of all the conceptually genetic materials of the intended area of this project. This study easily overcomes the bottlenecks associated with conventional molecular methods of retrieving genetic information and the unscientific shortage of microbial biodiversity research at Tabuk. High throughput bioinformatic analysis has been highlighted as the accurate exploration of the abundance and diversity of bacterial communities. Environmental DNA can be sequenced to identify the recent presence, relative abundance &amp; distribution of a prokaryotic species or whole communities of bacteria. A total of 333 bacterial metagenomes were sequenced over two seasons, fall and winter. The 16S rRNA genes were quantified during this period. The most significant species regarding the relative abundance and diversity were in the location of sample1 by, Klebsiella michiganensis (251), stenotrophomonass maltophilia (110), Escherichia coli USML2 (88), Zhongshania aliphaticivorans (40), Acidibrevibacterium fodinaquatile (12) Calothrix spp. &amp; Nibribacter ruber (10) Bacillus spp (10) respectively. On the other hand, the lowest abundances were in sample 4 location with Pseudomonas fluorescens (5) and Corynebacterium glutamicum (3) with (NA) species. This means these were unidentified yet. All these species have a growing demand for microbial biodiversity evaluations, given the pronounced impact of climate change in this region (Al-Lawz Mountains/Trojena Mountain). Benthic microbial communities are to be considered, given they have a potential role in CO2 and nitrogen fixation, which is related to plant growth-promoting properties. They can resist salinity, radiation, low-temperature adaptation, and biocontrol properties. Thus, eDNA cold-mountain biodiversity is a fraction of the time it costs to conduct conventional ecological monitoring.}, }
@article {pmid40285533, year = {2025}, author = {Liao, X and Wang, H and Wu, D and Grossart, HP and Yang, X and Li, L and Wang, Y and Li, S and Li, J and Cao, M and Chen, N and Hu, A}, title = {Geographical and Environmental Factors Differentially Shape Planktonic Microbial Community Assembly and Resistomes Composition in Urban Rivers.}, journal = {Global change biology}, volume = {31}, number = {4}, pages = {e70211}, doi = {10.1111/gcb.70211}, pmid = {40285533}, issn = {1365-2486}, support = {//the Ocean Negative Carbon Emissions (ONCE) Program/ ; 2021QZKK0103//the Second Tibetan Plateau Scientific Expedition and Research Program/ ; 2019QZKK0503//the Second Tibetan Plateau Scientific Expedition and Research Program/ ; 2023YFC3804904//National Key Research and Development Program/ ; }, mesh = {*Microbiota ; *Plankton ; China ; *Rivers/microbiology ; Bacteria/genetics/drug effects ; Urbanization ; }, abstract = {Global urbanization accelerates pollution challenges in urban rivers, including increased transmission of bacterial antibiotic resistance genes (ARGs), severely threatening the health of aquatic ecosystems and human health. Yet, systematic knowledge of differences in distribution and community assembly patterns of bacterial resistance across urban rivers at a continental scale is still insufficient. In this study, we conducted extensive sampling in nine representative urban rivers across China. We used amplicon and shotgun metagenomic sequencing, state-of-the-art bioinformatics, and multivariate statistics to investigate distribution patterns and community assembly mechanisms of planktonic microbiomes (i.e., bacterioplankton and planktonic microeukaryotes), including their resistomes, i.e., ARGs and metal resistance genes (MRGs). Geographical and environmental factors played a pivotal role in shaping distribution patterns of planktonic microbiomes vs. resistomes in the studied urban rivers. Phylogenetic-bin-based null model analysis (iCAMP) indicated that planktonic microbiomes, dominated by dispersal limitation and drift, tend toward spatial heterogeneity. In contrast, planktonic resistomes, driven by deterministic processes, display more similar distribution patterns. Cross-validated Mantel tests revealed that geographical factors (i.e., geographic distance) were the primary regulators of planktonic microbial community assembly, while environmental factors (i.e., temperature) control assembly processes of planktonic resistomes. Our findings provide crucial insights into the mechanisms driving the biogeographical distribution and community assembly of planktonic microbial entities in urban rivers at a continental scale, offering valuable implications for mitigating and managing the spread of ARGs from the environment to humans.}, }
@article {pmid40284601, year = {2025}, author = {Song, Z and Zhang, T and Liang, Y and Mcminn, A and Wang, M and Jiao, N and Luo, T}, title = {Seasonal Variations of Community Structure and Functional Genes of Synechococcus in the Subtropical Coastal Waters: Insights from FACS and High-Throughput Sequencing.}, journal = {Microorganisms}, volume = {13}, number = {4}, pages = {}, pmid = {40284601}, issn = {2076-2607}, abstract = {Synechococcus plays a pivotal role in the marine biogeochemical cycle. Advances in isolation techniques and high-throughput sequencing have expanded our understanding of the diversity of the Synechococcus community. However, their genomic diversity, functional dynamics and seasonal variations in the coastal waters are still not well known. Here, seawater samples were collected seasonally (March, June, August, December) from three stations in the coastal waters of Xiamen. Using fluorescence-activated cell sorting (FACS), we isolated 1000 Synechococcus cells per sample and performed ITS amplicon sequencing and metagenomic sequencing to analyze the seasonal variations in community structure and functional genes of Synechococcus. Firstly, we conducted a comparative analysis of in situ data and FACS data from three sampling sites in August. FACS samples revealed low-abundance Synechococcus strains underdetected by in situ samples. In addition, 24 clades representing Synechococcus subclusters S5.1, S5.2, and S5.3 were detected from three in situ samples and twelve FACS samples, suggesting the high diversity of Synechococcus in the coastal waters of Xiamen. Furthermore, the Synechococcus community displayed pronounced seasonal variations, and temperature significantly influenced the variations in Synechococcus community composition. Additionally, Synechococcus populations exhibit seasonal functional dynamics, with enhanced metabolic activity in summer characterized by higher numbers of functional genes associated with metabolic pathways compared to winter samples. Altogether, this study underscored the significance of FACS and high-throughput sequencing to reveal the diversity and functional dynamics of Synechococcus.}, }
@article {pmid40284188, year = {2025}, author = {Bonomo, MG and D'Angelo, S and Picerno, V and Carriero, A and Salzano, G}, title = {Recent Advances in Gut Microbiota in Psoriatic Arthritis.}, journal = {Nutrients}, volume = {17}, number = {8}, pages = {}, pmid = {40284188}, issn = {2072-6643}, mesh = {Humans ; *Arthritis, Psoriatic/microbiology/therapy/immunology ; *Gastrointestinal Microbiome ; Dysbiosis/microbiology ; Probiotics/therapeutic use ; Fecal Microbiota Transplantation ; }, abstract = {Psoriatic arthritis (PsA) is a chronic inflammatory disease characterized by joint inflammation and skin lesions. Recent research has underscored the critical role of gut microbiota-comprising bacteria, fungi, viruses, and archaea-in the pathogenesis and progression of PsA. This narrative review synthesizes the latest findings on the influence of gut microbiota on PsA, focusing on mechanisms such as immune modulation, microbial dysbiosis, the gut-joint axis, and its impact on treatment. Advances in high-throughput sequencing and metagenomics have revealed distinct microbial profiles associated with PsA. Studies show that individuals with PsA have a unique gut microbiota composition, differing significantly from healthy controls. Alterations in the abundance of specific bacterial taxa, including a decrease in beneficial bacteria and an increase in potentially pathogenic microbes, contribute to systemic inflammation by affecting the intestinal barrier and promoting immune responses. This review explores the impact of various factors on gut microbiota composition, including age, hygiene, comorbidities, and medication use. Additionally, it highlights the role of diet, probiotics, and fecal microbiota transplantation as promising strategies to modulate gut microbiota and alleviate PsA symptoms. The gut-skin-joint axis concept illustrates how gut microbiota influences not only gastrointestinal health but also skin and joint inflammation. Understanding the complex interplay between gut microbiota and PsA could lead to novel, microbiome-based therapeutic approaches. These insights offer hope for improved patient outcomes through targeted manipulation of the gut microbiota, enhancing both diagnosis and treatment strategies for PsA.}, }
@article {pmid40283102, year = {2025}, author = {Zhao, Y and Wang, Y and Lu, J and Zhu, B and Li, AD}, title = {Exploring the Ecological Impacts of Herbicides on Antibiotic Resistance Genes and Microbial Communities.}, journal = {Life (Basel, Switzerland)}, volume = {15}, number = {4}, pages = {}, pmid = {40283102}, issn = {2075-1729}, support = {BK20230742//the Natural Science Foundation of Jiangsu Province/ ; GWJJ2024100202//2024 Annual Project of the National Health Commission (NHC) Capacity Building and Continuing Education Center/ ; M2022083//Scientific Research Project of Jiangsu Health Committee/ ; ZDXK202249//Jiangsu Provincial Medical Key Discipline/ ; 2024ZB315//Jiangsu Funding Program for Excellent Postdoctor/ ; }, abstract = {The widespread application of herbicides has profound ecological consequences, particularly regarding the distribution of antibiotic resistance genes (ARGs) and microbial communities. In this study, we analyzed herbicide-related metagenomic data to assess the impact of herbicide exposure on ARGs and microbial populations. Our results demonstrate that herbicide application significantly increased the abundance of ARGs, particularly those associated with multidrug resistance, sulfonamides, and bacitracin, with notable increases in subtypes such as bacA and sul1. Microbial community analyses revealed a dominance of Pseudomonadota and Actinomycetota, along with a significant down-regulation of genera like Fibrisoma, Gilsonvirus, Limnobacter, and Wilnyevirus in the experimental group. Additionally, herbicide exposure led to a marked reduction in biodiversity. When threshold values were relaxed, correlation analyses revealed a co-occurrence pattern between multiple genes and sul1, suggesting that horizontal gene transfer plays a pivotal role in the spread of antibiotic resistance in herbicide-contaminated soils. Moreover, environmental factors were found to significantly influence both microbial community composition and ARG distribution. These findings highlight the complex ecological effects of herbicides on microbial diversity and the dissemination of resistance genes, emphasizing the need for further research into the long-term environmental and public health implications of herbicide use.}, }
@article {pmid40282295, year = {2025}, author = {Laguerre, H and Noël, C and Jégou, C and Fleury, Y and Le Chevalier, P}, title = {The Cœlomic Microbiota Among Three Echinoderms: The Black Sea Cucumber Holothuria forskali, the Sea Star Marthasterias glacialis, and the Sea Urchin Sphaerechinus granularis.}, journal = {Biology}, volume = {14}, number = {4}, pages = {}, pmid = {40282295}, issn = {2079-7737}, abstract = {In this study, the bacterial communities of the cœlomic microbiota were characterized in three Echinoderms: the deposit feeder sea Cucumber Holothuria forskali, the herbivorous sea Urchin Sphaerechinus granularis, and the carnivorous sea Star Marthasterias glacialis. Samples were collected from the same habitat in the Glénan Archipelago (Brittany, France) at different times for 2 years. The cœlomic microbiota were analyzed by targeted metagenomic with V4-16S metabarcoding and by a culturable approach with the isolation of strains and antimicrobial activity assays. Most of the OTUs of the cœlomic microbiota were affiliated with the phylum Proteobacteria and, notably, five orders: Burkholderiales, Flavobacteriales, Alteromonadales, Vibrionales and Pseudomonadales. Significant differences were observed regarding richness, biodiversity and composition between species and sampling dates. They could be explained by sub-abundant taxa that represented the global diversity. Cœlomic microbiota also revealed shared and unshared bacterial communities, validating a potential "specific" microbiota among the three Echinoderm species. Moreover, significant variations of the microbiota occurred among the sampling dates, suggesting a plasticity and, thus, a potential selection of these microbiota. Finally, out of the 831 bacterial strains isolated from culturable microbiota, 20 strains exhibited antibacterial activities, most of them assigned to the genera Shewanella, Pseudoalteromonas and Vibrio.}, }
@article {pmid40280386, year = {2025}, author = {An, X and Zhao, R and Wang, L and Xiao, X and Xu, Z and Zhang, S and Xie, D and Xiao, Y and Zhang, Q}, title = {Thiocyanate degradation by mixed bacterial consortia: Adaptive mechanism in response to thiocyanate stress and metabolic pathway.}, journal = {Environmental research}, volume = {278}, number = {}, pages = {121688}, doi = {10.1016/j.envres.2025.121688}, pmid = {40280386}, issn = {1096-0953}, mesh = {*Thiocyanates/metabolism ; Biodegradation, Environmental ; *Microbial Consortia ; Metabolic Networks and Pathways ; *Water Pollutants, Chemical/metabolism ; *Bacteria/metabolism ; Thiobacillus/metabolism/genetics ; }, abstract = {Thiocyanate, frequently detected in various industrial wastewater, poses significant risks to organisms. The activated sludge isolate thiocyanate-degrading bacterial consortia (TDBC) efficiently metabolizes thiocyanate. However, the adaptive mechanism in response to thiocyanate stress and metabolic pathway by TDBC have not been elucidated. Metagenomic analysis showed that Thiobacillus (77.73 %) were the primary degraders for the efficient degradation of thiocyanate. A total of 27 genes related to thiocyanate biodegradation were identified, including SCNase, COSase, sulfur oxidation, denitrification and carbon fixation. Metaproteomic revealed the high expression of chemotaxis protein and thioredoxin enhances cellular oxidative stress and maintains normal physiological metabolism. Additionally, the differentially expressed proteins were primarily involved in metabolic pathways including sphingolipid metabolism, energy metabolism, oxidative phosphorylation, two-component system and amino acid metabolism. Then the lipid, organic acid and amino acid metabolism were up-regulated by metabolomic analysis, thereby achieving the degradation of thiocyanate. Using a combination of qRT-PCR and parallel reaction monitoring (PRM), 27 key genes involved in thiocyanate biodegradation have been identified, providing a theoretical basis for developing microbial strategies to mitigate thiocyanate pollution. Molecular docking deepens the understanding of the interaction between degrading enzyme and thiocyanate. This study provides a theoretical basis for the microbial remediation of thiocyanate-containing wastewater.}, }
@article {pmid40280272, year = {2025}, author = {Bačnik, K and Kranjc, L and Botella, L and Maguire, I and Pavić, D and Patoka, J and Dragičević, P and Bláha, M and Bielen, A and Kouba, A and Kutnjak, D and Hudina, S}, title = {Crayfish pet trade as a pathway for the introduction of known and novel viruses.}, journal = {Journal of invertebrate pathology}, volume = {211}, number = {}, pages = {108345}, doi = {10.1016/j.jip.2025.108345}, pmid = {40280272}, issn = {1096-0805}, mesh = {Animals ; *Astacoidea/virology ; *Introduced Species ; *Pets/virology ; *Virome ; }, abstract = {Expanding international pet trade has emerged as one of the main introduction pathways of aquatic invasive species, with ornamental crayfish species commonly available on the EU and global markets. Besides most frequently studied crayfish pathogens, such as Aphanomyces astaci and white spot syndrome virus (WSSV), ornamental crayfish carry associated microbial communities, which may potentially lead to the emergence of known or even novel diseases following intentional or unintentional release of animals into the wild. This is especially problematic in the case of viruses, which represent an important, yet considerably understudied, group of crayfish pathogens. Here we analyzed viromes of hepatopancreas tissue of four crayfish species acquired in the international pet trade in Europe (Procambarus clarkii, Procambarus alleni, Cherax holthuisi, and Cherax quadricarinatus) using a high throughput sequencing based metagenomic approach. Seven different known viruses were identified, which were previously either directly associated with crayfish (WSSV, Cherax quadricarinatus reovirus, chequa iflavirus, athtab bunya-like virus) or with hosts from subphylum Crustacea or invertebrates associated with freshwater environment (Shahe ispoda virus 5, Dicistroviridae sp.). Additional sequences represented 8 potential novel and divergent RNA viruses, most similar to sequences belonging to members of Picornavirales, Elliovirales, Reovirales, Hepelivirales, Tolivirales and Ghabrivirales orders. We discuss our findings in relation to their phylogenetic relationships, geographical origins, and putative pathogenicity implications. The results highlight the need for further research into the risks related to disease emergence associated with the pet trade.}, }
@article {pmid40275408, year = {2025}, author = {Pérez-Carrascal, OM and Pratama, AA and Sullivan, MB and Küsel, K}, title = {Unveiling plasmid diversity and functionality in pristine groundwater.}, journal = {Environmental microbiome}, volume = {20}, number = {1}, pages = {42}, pmid = {40275408}, issn = {2524-6372}, abstract = {BACKGROUND: Plasmids are key in creating a dynamic reservoir of genetic diversity, yet their impact on Earth's continental subsurface-an important microbial reservoir-remains unresolved. We analyzed 32 metagenomic samples from six groundwater wells within a hillslope aquifer system to assess the genetic and functional diversity of plasmids and to evaluate the role of these plasmids in horizontal gene transfer (HGT).<br><br>RESULTS: Our results revealed 4,609 non-redundant mobile genetic elements (MGEs), with 14% (664) confidently classified as plasmids. These plasmids displayed well-specific populations, with fewer than 15% shared across wells. Plasmids were linked to diverse microbial phyla, including Pseudomonadota (42.17%), Nitrospirota (3.31%), Candidate Phyla Radiation (CPR) bacteria (2.56%), and Omnitrophota (2.11%). The presence of plasmids in the dominant CPR bacteria is significant, as this group remains underexplored in this context. Plasmid composition strongly correlated with well-specific microbial communities, suggesting local selection pressures. Functional analyses highlighted that conjugative plasmids carry genes crucial for metabolic processes, such as cobalamin biosynthesis and hydrocarbon degradation. Importantly, we found no evidence of high confidence emerging antibiotic resistance genes, contrasting with findings from sewage and polluted groundwater.<br><br>CONCLUSIONS: Overall, our study emphasizes the diversity, composition, and eco-evolutionary role of plasmids in the groundwater microbiome. The absence of known antibiotic resistance genes highlights the need to preserve groundwater in its pristine state to safeguard its unique genetic and functional landscape.}, }
@article {pmid40273394, year = {2025}, author = {Chen, CC and Chiu, JY and Tan, AH and Toh, TS and Lim, SY and Tan, EK and Pettersson, S and Hsu, CC and Liou, JM and Wu, MS and Hsu, CL and Lin, CH}, title = {Investigating Plasma Metabolomics and Gut Microbiota Changes Associated With Parkinson Disease: A Focus on Caffeine Metabolism.}, journal = {Neurology}, volume = {104}, number = {10}, pages = {e213592}, pmid = {40273394}, issn = {1526-632X}, mesh = {Humans ; *Caffeine/blood/metabolism ; *Parkinson Disease/blood/microbiology/metabolism ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Metabolomics ; Middle Aged ; Aged ; Coffee ; Cohort Studies ; Taiwan ; }, abstract = {BACKGROUND AND OBJECTIVES: Coffee intake is linked to a reduced risk of Parkinson disease (PD), but whether this effect is mediated by gut microbiota and metabolomic changes remains unclear. This study examines PD-associated metabolomic shifts, caffeine metabolism, and their connection to gut microbiome alterations in a multicenter study.<br><br>METHODS: We conducted an untargeted serum metabolomic assay using liquid chromatography with high-resolution mass spectrometry on an exploratory cohort recruited from National Taiwan University Hospital (NTUH). A targeted metabolomic assay focusing on caffeine and its 12 downstream metabolites was conducted and validated in an independent cohort from University Malaya Medical Centre (UMMC). In the exploratory cohort, the association of each caffeine metabolite with gut microbiota changes was investigated by metagenomic shotgun sequencing. A clustering-based approach was used to correlate microbiome changes with plasma caffeine metabolite level and clinical severity. Body mass index, antiparkinsonism medication use, and dietary habits (including coffee and tea intake) were recorded.<br><br>RESULTS: Sixty-three patients with PD and 54 controls from NTUH formed the exploratory cohort while 36 patients with PD and 20 controls from UMMC served as an validation cohort to replicate the plasma caffeine findings. A total of 5,158 metabolites were detected from untargeted metabolomic analysis, with 3,131 having high confidence for analysis. Compared with controls, the abundance of 56 metabolites was significantly higher and that of 7 metabolites was significantly lower (adjusted p < 0.05 and log2 fold change >1) in patients with PD. Caffeine metabolism was significantly lower in patients with PD (p = 0.0013), and serum levels of caffeine and its metabolites negatively correlated with motor severity (p < 0.01). Targeted metabolomic analysis confirmed reduced levels of caffeine and its metabolites, including theophylline, paraxanthine, 1,7-dimethyluric acid, and 5-acetylamino-6-amino-3-methyluracil, in patients with PD; these findings were replicated in the validation cohort (p < 0.05). A clustering approach found that 56 microbiome species enriched in patients with PD negatively correlated with caffeine and its metabolites paraxanthine and theophylline (both p < 0.05), notably Clostridium sp000435655, Acetatifactor sp900066565, Oliverpabstia intestinalis, and Ruminiclostridium siraeum.<br><br>DISCUSSION: This study identifies PD-related changes in microbial-caffeine metabolism compared with controls. Our findings offer insights for future functional research on caffeine-microbiome interactions in PD.}, }
@article {pmid40272147, year = {2025}, author = {Dai, X and Cao, Y and Li, L and Gao, Y-X and Wang, J-X and Liu, Y-J and Ma, T-T and Zheng, J-M and Zhan, P-P and Shen, Z-Y}, title = {Gut microbiome and metabolome profiles in renal allograft rejection from multiomics integration.}, journal = {mSystems}, volume = {10}, number = {5}, pages = {e0162624}, pmid = {40272147}, issn = {2379-5077}, support = {82241219//National Natural Science Foundation of China/ ; 82127808//National Major Science and Technology Projects of China/ ; 81921004//National Natural Science Foundation of China/ ; NKTM2023005//Institute of Transplantation Medicine NanKai University/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Kidney Transplantation/adverse effects ; Female ; *Graft Rejection/metabolism/microbiology/diagnosis ; Male ; *Metabolome ; Adult ; Middle Aged ; Metabolomics/methods ; Feces/microbiology ; Multiomics ; }, abstract = {UNLABELLED: The gut microbiome and metabolome play crucial roles in renal allograft rejection progression. Integrated multiomics analyses may provide a comprehensive understanding of specific underlying mechanisms, which remain elusive. This study aimed to identify new approaches for clinical renal allograft rejection diagnosis and treatment. Thirty-five patients were divided into three groups: the rejection (n = 16), dysfunction (n = 7), and control (n = 12) groups. Metagenomic sequencing and nontargeted metabolomics were used to analyze stool and plasma samples. Significant microbiota, metabolites, and signaling pathways were identified. LASSO regression was used to construct a diagnostic model, and its diagnostic value was assessed via receiver operating characteristic curves. The microbiota composition and the related genes in the rejection group significantly differed from that in the dysfunction and control groups at the phylum, genus, and species levels (P < 0.001). The core species in the rejection group networks were Escherichia coli and Ruminococcus gnavus, while core species in the dysfunction group networks were Faecalibacterium prausnitzii and Bacteroides ovatus. The balance of specific microbial species was associated with kidney function in rejection patients. Spearman analysis revealed that specific differential species like Agathobaculum butyriciproducens and Gemmiger qucibialis were closely linked to the levels of serum 4-pyridoxic acid, 4-acetamidobutanoate, and fecal tryptamine from specific differential pathways. Finally, we constructed four clinical models to distinguish the rejection and dysfunction groups, and the model had excellent diagnostic performance. Altered gut microbiota may contribute to changes in metabolic pathway activity and metabolite abundance in rejection and dysfunction patients, which are strongly correlated with host immunological rejection. The diagnostic model, developed based on the gut microbiota and metabolites, has high clinical value for diagnosing renal rejection.<br><br>IMPORTANCE: This study aimed to screen new markers for non-invasive diagnosis by the gut microbiome and metabolome analysis, providing new insights into rejection mechanisms and identifying new approaches for clinical renal allograft rejection diagnosis.}, }
@article {pmid40269516, year = {2025}, author = {Cumbo, F and Truglia, S and Weitschek, E and Blankenberg, D}, title = {Feature selection with vector-symbolic architectures: a case study on microbial profiles of shotgun metagenomic samples of colorectal cancer.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {2}, pages = {}, pmid = {40269516}, issn = {1477-4054}, support = {U24 CA231877/CA/NCI NIH HHS/United States ; U24HG006620/NH/NIH HHS/United States ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology/genetics ; *Metagenomics/methods ; *Metagenome ; *Microbiota ; *Gastrointestinal Microbiome ; Computational Biology/methods ; Algorithms ; }, abstract = {UNLABELLED: The continuously decreasing cost of next-generation sequencing has recently led to a significant increase in the number of microbiome-related studies, providing invaluable information for understanding host-microbiome interactions and their relation to diseases. A common approach in metagenomics consists of determining the composition of samples in terms of the amount and types of microbial species that populate them, with the goal of identifying microbes whose profiles are able to differentiate samples under different conditions with advanced feature selection techniques. Here, we propose a novel backward variable selection method based on the hyperdimensional computing (HDC) paradigm, which takes inspiration from how the human brain works in the classification of concepts by encoding features into vectors in a high-dimensional space. We validated our method on public metagenomic samples collected from patients affected by colorectal cancer in a case/control scenario, by performing a comparative analysis with other state-of-the-art feature selection methods, obtaining promising results.<br><br>AUTHOR SUMMARY: Characterizing the microbial composition of metagenomic samples is crucial for identifying potential biomarkers that can distinguish between healthy and diseased states. However, the high dimensionality and complexity of metagenomic data present significant challenges in the context of accurately selecting features. Our backward variable selection method, based on the HDC paradigm, offers a promising approach to overcoming these challenges. By effectively reducing the feature space while preserving essential information, this method enhances the ability to detect critical microbial signatures associated with diseases like colorectal cancer, leading to more precise diagnostic tools.}, }
@article {pmid40269515, year = {2025}, author = {Sirasani, JP and Gardner, C and Jung, G and Lee, H and Ahn, TH}, title = {Bioinformatic approaches to blood and tissue microbiome analyses: challenges and perspectives.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {2}, pages = {}, pmid = {40269515}, issn = {1477-4054}, support = {2430236//National Science Foundation/ ; }, mesh = {Humans ; *Microbiota/genetics ; *Computational Biology/methods ; High-Throughput Nucleotide Sequencing ; Machine Learning ; Biomarkers/blood ; }, abstract = {Advances in next-generation sequencing have resulted in a growing understanding of the microbiome and its role in human health. Unlike traditional microbiome analysis, blood and tissue microbiome analyses focus on the detection and characterization of microbial DNA in blood and tissue, previously considered a sterile environment. In this review, we discuss the challenges and methodologies associated with analyzing these samples, particularly emphasizing blood and tissue microbiome research. Key preprocessing steps-including the removal of ribosomal RNA, host DNA, and other contaminants-are critical to reducing noise and accurately capturing microbial evidence. We also explore how taxonomic profiling tools, machine learning, and advanced normalization techniques address contamination and low microbial biomass, thereby improving reliability. While it offers the potential for identifying microbial involvement in systemic diseases previously undetectable by traditional methods, this methodology also carries risks and lacks universal acceptance due to concerns over reliability and interpretation errors. This paper critically reviews these factors, highlighting both the promise and pitfalls of using blood and tissue microbiome analyses as a tool for biomarker discovery.}, }
@article {pmid40269473, year = {2025}, author = {Khan, MAW and Bohannan, BJM and Meyer, KM and Womack, AM and Nüsslein, K and Grover, JP and Mazza Rodrigues, JL}, title = {Community-Level Metabolic Shifts Following Land Use Change in the Amazon Rainforest Identified by a Supervised Machine Leaning Approach.}, journal = {Environmental microbiology reports}, volume = {17}, number = {2}, pages = {e70088}, pmid = {40269473}, issn = {1758-2229}, support = {DE-AC02-05CH11231//U.S. Department of Energy/ ; DEB 14422214//National Science Foundation/ ; }, mesh = {*Rainforest ; *Soil Microbiology ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; *Microbiota ; Metagenomics/methods ; Metagenome ; *Archaea/genetics/metabolism/classification/isolation &amp; purification ; Soil/chemistry ; Viruses/genetics/classification/metabolism/isolation &amp; purification ; Machine Learning ; Brazil ; }, abstract = {The Amazon rainforest has been subjected to high rates of deforestation, mostly for pasturelands, over the last few decades. This change in plant cover is known to alter the soil microbiome and the functions it mediates, but the genomic changes underlying this response are still unresolved. In this study, we used a combination of deep shotgun metagenomics complemented by a supervised machine learning approach to compare the metabolic strategies of tropical soil microbial communities in pristine forests and long-term established pastures in the Amazon. Machine learning-derived metagenome analysis indicated that microbial community structures (bacteria, archaea and viruses) and the composition of protein-coding genes were distinct in each plant cover type environment. Forest and pasture soils had different genomic diversities for the above three taxonomic groups, characterised by their protein-coding genes. These differences in metagenome profiles in soils under forests and pastures suggest that metabolic strategies related to carbohydrate and energy metabolisms were altered at community level. Changes were also consistent with known modifications to the C and N cycles caused by long-term shifts in aboveground vegetation and were also associated with several soil physicochemical properties known to change with land use, such as the C/N ratio, soil temperature and exchangeable acidity. In addition, our analysis reveals that these alterations in land use can also result in changes to the composition and diversity of the soil DNA virome. Collectively, our study indicates that soil microbial communities shift their overall metabolic strategies, driven by genomic alterations observed in pristine forests and long-term established pastures with implications for the C and N cycles.}, }
@article {pmid40269059, year = {2025}, author = {Aljutaily, T and Aladhadh, M and Alsaleem, KA and Alharbi, HF and Barakat, H and Aljumayi, H and Moustafa, MMA and Rehan, M}, title = {Gut microbiota diversity in obese rats treated with intermittent fasting, probiotic-fermented camel milk with or without dates and their combinations.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {14204}, pmid = {40269059}, issn = {2045-2322}, support = {QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; QU-APC-2024-9/1//Deanship of Graduate Studies and Scientific Research at Qassim University/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Camelus ; Rats ; *Obesity/microbiology/diet therapy ; *Probiotics/administration &amp; dosage ; *Fasting ; *Milk ; Male ; RNA, Ribosomal, 16S/genetics ; Bacteria/genetics/classification ; Biodiversity ; Cultured Milk Products ; Intermittent Fasting ; }, abstract = {Dietary alternatives help effectively in obesity management. The present study examines the gut microbiota diversity in obesity-induced rats treated with intermittent fasting, fermented camel milk (FCM), and FCM-incorporated Sukkari date or their combinations. The metagenomic analysis of the gut microbiome through 16 S rRNA revealed 226 families, 499 genera, and 879 bacterial species. In the taxonomy distributions and heatmap analysis, Bacteroidota (i.e., Prevotella) had the uppermost relative abundance in groups before treatments (Before_Groups, most samples clustered in one sub-cluster) reached 80.50% in sample S11 (Before_G2), whereas Firmicutes (i.e., Lactobacillus) presented the dominant in groups after treatments (After_Groups, generality samples grouped in another sub-cluster) and counted 70.86% in sample S88 (After_G6), reflecting potential short-chain fatty acids production. The alpha and beta diversity explored by Shannon and PCoA indices presented high diversity in most groups after treatment. Deferribacterota and Fusobacteriota, in addition to Stenotrophomonas and Listeria, were the key phylotypes in the treated groups at the Phylum and genus levels, respectively. The proposed functional pathways involving mannan, rhamnose I, glucose, and xylose degradation were the most supported pathways in After_Groups with potential carbohydrate degradation. Eventually, intermittent fasting and probiotic fermented camel milk increased microbiome diversity and accelerated weight loss, preventing health issues.}, }
@article {pmid40268958, year = {2025}, author = {Luo, Q and Gao, H and Xiang, Y and Li, J and Dong, L and Wang, X and Liu, F and Guo, Y and Shen, C and Ding, Q and Qin, C and Liang, G and Wen, L}, title = {The dynamics of microbiome and virome in migratory birds of southwest China.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {64}, pmid = {40268958}, issn = {2055-5008}, mesh = {Animals ; China ; *Virome ; Feces/microbiology/virology ; *Gastrointestinal Microbiome ; *Charadriiformes/microbiology/virology ; Animal Migration ; *Bacteria/classification/genetics/isolation &amp; purification ; *Viruses/classification/genetics/isolation &amp; purification ; *Birds/microbiology/virology ; Metagenomics ; Phylogeny ; }, abstract = {Migratory birds carry pathogens, posing a significant threat to environmental and human health. We documented the metatranscriptome and RNA virome of 896 stool samples from migratory birds and environmental samples over four consecutive years in southwest China. Our analysis identified Catellicoccus marimammalium as the predominant bacterium in the gut of black-headed gulls, with an average relative abundance of 79.3%. Strain-level analysis of C. marimammalium revealed a dominant population with some longitudinal diversity over the four years. Additionally, the gut of black-headed gulls was found to harbor numerous viruses, including a novel hepatovirus. Lysates of cells of C. marimammalium but not other bacteria derived from black-headed gulls could inhibit the replication of human hepatovirus, suggesting a potential regulatory role for gut commensal bacteria in modulating viral carriage. These findings enhance our understanding of the microbiome and RNA virome diversity in migratory birds and provide insights into the modulation of asymptomatic infections.}, }
@article {pmid40267563, year = {2025}, author = {Jian, Z and Wu, H and Yan, S and Li, T and Zhao, R and Zhao, J and Zi, X and Wang, K and Huang, Y and Gu, D and Zhao, S and Ge, C and Jia, J and Liu, L and Xu, Z and Dou, T}, title = {Species and functional composition of cecal microbiota and resistance gene diversity in different Yunnan native chicken breeds: A metagenomic analysis.}, journal = {Poultry science}, volume = {104}, number = {7}, pages = {105138}, doi = {10.1016/j.psj.2025.105138}, pmid = {40267563}, issn = {1525-3171}, mesh = {Animals ; *Chickens/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; *Cecum/microbiology ; Metagenomics ; China ; *Genetic Variation ; *Drug Resistance, Microbial/genetics ; Bacteria/genetics/drug effects ; }, abstract = {The gut microbiota of chickens not only modulates host immune function and production performance through nutrient metabolism but also serves as a reservoir for antibiotic resistance genes (ARGs), whose accumulation exacerbates bacterial resistance. This study integrated 108 cecal microbiome samples from six Yunnan native chicken breeds under free-range and caged farming systems, constructing a comprehensive catalog comprising 12,715 microbial genomes. We systematically revealed the dual mechanisms by which the gut microbiota regulates host phenotypes and ARG dissemination. Metagenomic analysis demonstrated that Alistipes, Prevotella, and Spirochaeta synergistically regulate body weight and immune indices through metabolic networks, which are linked to the significant enrichment of carbohydrate-active enzymes. GH23 and GT2 presented the greatest abundance, highlighting their pivotal role in dietary fiber metabolism. A total of 1327 ARGs were identified, spanning seven resistance mechanisms dominated by antibiotic efflux and target alteration. Alistipes_sp._CAG:831 presented the highest ARG abundance and diversity, with ARG levels strongly correlated with host bacterial abundance. Metagenomic-phenotype association networks further revealed that environmental stress drives disparities in ARG enrichment by altering the microbial community structure. This study elucidates the gut microbiota-host interaction network in Yunnan native chickens and provides critical insights into ARG transmission dynamics, offering a theoretical foundation for antibiotic resistance risk assessment and sustainable poultry farming strategies.}, }
@article {pmid40263874, year = {2025}, author = {Huang, X and Li, R and Xu, J and Kang, J and Chen, X and Han, B and Xue, Y}, title = {Integrated multi-omics uncover viruses, active fermenting microbes and their metabolic profiles in the Daqu microbiome.}, journal = {Food research international (Ottawa, Ont.)}, volume = {208}, number = {}, pages = {116061}, doi = {10.1016/j.foodres.2025.116061}, pmid = {40263874}, issn = {1873-7145}, mesh = {*Fermentation ; *Microbiota ; Fungi/metabolism/genetics ; *Bacteria/metabolism/genetics ; *Viruses/genetics/classification ; Metagenomics ; Food Microbiology ; *Fermented Foods/microbiology/virology ; Bacteriophages/genetics ; *Metabolome ; Multiomics ; }, abstract = {The coexistence and coevolution of viruses and fermenting microbes have a significant impact on the structure and function of microbial communities. Although the presence of viruses in Daqu, the fermentation starter for Chinese Baijiu, has been documented, their specific effects on the community composition and metabolic functions of low, medium, and high-temperature Daqu remain unclear. In this study, we employed multi-omics technology to explore the distribution of viruses and active bacteria and fungi in various Daqu and their potential metabolic roles. Viral metagenomic sequencing showed a predominance of Parvoviridae in High-Temperature Daqu (HTQ), while Genomoviridae were dominant in Medium-Temperature Daqu (MTQ) and Low- Temperature Daqu (LTQ). Phages belonging to the Siphoviridae, Podoviridae, Herelleviridae, and Myoviridae families showed significantly different abundances across three Daqu groups. Metatranscriptomic analysis showed that fungal communities were most active in LTQ, whereas bacterial communities were dominant in MTQ and HTQ. By employing the CRISPR-Cas spacer, a higher predicted number of phage-host linkages was identified in LTQ, particularly with hosts including Lactobacillus, Staphylococcus, Acinetobacter, Enterobacter, and Bacillus. Correlation analysis showed that bacteria like Acinetobacter, Lactobacillus, and Streptococcus exhibited the strongest associations with metabolites, particularly amino acids and organic acids. The potential phage-induced metabolic differences in the three Daqu groups were mainly linked to pathways involved in the metabolism of amino acids, sugars, and organic acids. Overall, our study elucidates the impact of viruses on shaping microbial composition and influencing metabolic functions in Daqu. These results improve our comprehension of viruses and microbes in Daqu microbial communities and provide valuable insights for enhancing quality control in Daqu production.}, }
@article {pmid40263747, year = {2025}, author = {Liu, CG and Lin, MX and Xin, Y and Sun, M and Cui, J and Liu, D and Zang, D and Chen, J}, title = {Metagenomics and Non-Targeted Metabolomics Reveal the Role of Gut Microbiota and Its Metabolites in Brain Metastasis of Non-Small Cell Lung Cancer.}, journal = {Thoracic cancer}, volume = {16}, number = {8}, pages = {e70068}, pmid = {40263747}, issn = {1759-7714}, support = {2022RQ091//Science and Technology Talent Innovation Support Plan of Dalian/ ; 82203056//National Natural Science Foundation of China/ ; 2022LCYJYB01//The "1+X" program for Clinical Competency enhancement-Clinical Research Incubation Project of the Second Hospital of Dalian Medical University/ ; 2023-BS-167//Natural Science Foundation of Liaoning Province/ ; }, mesh = {Humans ; *Carcinoma, Non-Small-Cell Lung/pathology/metabolism/microbiology ; *Gastrointestinal Microbiome ; *Brain Neoplasms/secondary/metabolism ; *Lung Neoplasms/pathology/metabolism/microbiology ; *Metabolomics/methods ; Female ; Male ; *Metagenomics/methods ; Middle Aged ; Aged ; Prognosis ; }, abstract = {BACKGROUND: Brain metastasis is a common and severe complication in non-small cell lung cancer (NSCLC) patients, significantly affecting prognosis. However, the role of gut microbiota and its metabolites in NSCLC brain metastasis remains poorly understood. This study aims to explore the relationship between gut microbiota, metabolites, and the development of brain metastasis in NSCLC.<br><br>METHODS: We conducted an integrative analysis combining metagenomics and non-targeted metabolomics on baseline fecal samples from NSCLC patients with brain metastasis (n&#x2009;=&#x2009;18) and those without distant metastasis (n&#x2009;=&#x2009;12). Gut microbiota composition and metabolite profiles were detected and analyzed, and statistical methods, including machine learning models, were applied to identify differences and potential biomarkers.<br><br>RESULTS: Significant differences in gut microbiota composition were found between the two groups, with higher microbial diversity observed in patients with brain metastasis. Specific genera, such as Paenibacillus, Fournierella, and Adlercreutzia, were enriched in the brain metastasis group. Metabolomic analysis revealed altered levels of short-chain fatty acids and other metabolites associated with immune modulation and vascular permeability, including angiotensin (1-7). These changes were linked to the metastatic process and may influence brain metastasis development. Furthermore, machine learning models identified key biomarkers, such as Raoultibacter, Mobilibacterium, and N-acetyl-L-glutamic acid, which could serve as valuable indicators for brain metastasis.<br><br>CONCLUSIONS: Our findings suggest that gut microbiota dysbiosis and its metabolic products may contribute to the development of brain metastasis in NSCLC. The identification of microbiota-derived biomarkers holds potential for early detection and therapeutic intervention in NSCLC brain metastasis.}, }
@article {pmid40263287, year = {2025}, author = {Gao, D and Zhuang, Y and Liu, S and Ma, B and Xu, Y and Zhang, H and Nuermaimaiti, Y and Chen, T and Hou, G and Guo, W and You, J and Huang, Z and Xiao, J and Wang, W and Li, M and Li, S and Cao, Z}, title = {Multi-omics profiling of dairy cattle oxidative stress identifies hindgut-derived Phascolarctobacterium succinatutens exhibiting antioxidant activity.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {61}, pmid = {40263287}, issn = {2055-5008}, support = {2024BBF01006//Key Research and Development Program of Ningxia/ ; 2023YFD1300904//National Key Research and Development Program of China/ ; 2024-KFKT-026//National Center of Technology Innovation for Dairy/ ; PC2023B02002//Pinduoduo-China Agricultural University Research Fund/ ; }, mesh = {Animals ; Cattle ; *Oxidative Stress ; *Antioxidants/metabolism ; *Gastrointestinal Microbiome ; RNA, Ribosomal, 16S/genetics ; Female ; Mice ; Fatty Acids, Volatile/metabolism ; Metabolomics ; Metagenomics ; *Clostridiales/genetics/metabolism/isolation &amp; purification ; Multiomics ; }, abstract = {An imbalance between oxidative and antioxidant processes in the host can lead to excessive oxidation, a condition known as oxidative stress (OS). Although changes in the hindgut microbiota have been frequently linked to OS, the specific microbial and metabolic underpinnings of this association remain unclear. In this study, we enrolled 81 postpartum Holstein cows and stratified them into high oxidative stress (HOS, n = 9) and low oxidative stress (LOS, n = 9) groups based on the oxidative stress index (OSi). Using a multi-omics approach, we performed 16S rRNA gene sequencing to evaluate microbial diversity, conducted metagenomic analysis to identify functional bacteria, and utilized untargeted metabolomics to profile serum metabolites. Our analyses revealed elevated levels of kynurenine, formyl-5-hydroxykynurenamine, and 5-hydroxyindole-3-acetic acid in LOS dairy cows. Additionally, the LOS cows had a higher abundance of short-chain fatty acids (SCFAs)-producing bacteria, including Bacteroidetes bacterium, Paludibacter propionicigenes, and Phascolarctobacterium succinatutens (P. succinatutens), which were negatively correlated with OSi. To explore the potential role of these bacteria in mitigating OS, we administered P. succinatutens (10[8] cfu/day for 14 days) to C57BL/6 J mice (n = 10). Oral administration of P. succinatutens significantly increased serum total antioxidant capacity, decreased total oxidants, and reduced OSi in mice. Moreover, this treatment promoted activation of the Nrf2-Keap1 antioxidant pathway, significantly enhancing the enzymatic activities of GSH-Px and SOD, as well as the concentrations of acetate and propionate in the colon. In conclusion, our findings suggest that systemic tryptophan metabolism and disordered SCFAs production are concurrent factors influenced by hindgut microbiota and associated with OS development. Modulating the hindgut microbiota, particularly by introducing specific SCFAs-producing bacteria, could be a promising strategy for combating OS.}, }
@article {pmid40263159, year = {2025}, author = {Pandey, A and Israr, J and Pandey, J and Misra, S}, title = {Current Approaches and Implications in Discovery of Novel Bioactive Products from Microbial Sources.}, journal = {Current microbiology}, volume = {82}, number = {6}, pages = {258}, pmid = {40263159}, issn = {1432-0991}, mesh = {*Biological Products/metabolism/pharmacology/isolation &amp; purification/chemistry ; *Drug Discovery/methods ; *Bacteria/metabolism/genetics ; Multigene Family ; Biosynthetic Pathways/genetics ; Microbiota ; }, abstract = {Bioactive Natural Products (BNPs) are in high demand due to their disease-preventive capabilities and resistance to pathogens. However, our understanding of BNP-producing microbes is limited, because many microbial populations remain uncultivated. Various approaches have been employed to explore the potential of these hidden microbes for new bioactive therapeutic compounds. Nevertheless, the possibility of discovering BNPs from microbial communities is largely cryptic due to their unculturable nature and the absence of triggers to activate the dormant Biosynthetic Gene Clusters (BGCs). Metagenome sequencing, followed by mining and characterization, is an effective approach for discovering new therapeutic BNPs. The inactive state of BGCs can be activated through the combinatorial interaction of different microbial communities within a common niche, overcoming programmable co-evolutionary stress and producing new BNPs. The present review discusses and explores the potential of hidden, uncultivated microbes for discovering novel Bioactive Natural Products (BNPs). Moreover, it provides insights into optimizing microbial production systems and fostering sustainable drug discovery and development practices by integrating multidisciplinary strategies. This review also emphasizes the critical role of microbial sources in the ongoing search for new bioactive products that can meet the demands of modern healthcare and environmental sustainability.}, }
@article {pmid40262434, year = {2025}, author = {Lima, RAT and Garay, AV and Frederico, TD and de Oliveira, GM and Quirino, BF and Barbosa, JARG and Freitas, SM and Krüger, RH}, title = {Biochemical and structural characterization of a family-9 glycoside hydrolase bioprospected from the termite Syntermes wheeleri gut bacteria metagenome.}, journal = {Enzyme and microbial technology}, volume = {189}, number = {}, pages = {110654}, doi = {10.1016/j.enzmictec.2025.110654}, pmid = {40262434}, issn = {1879-0909}, mesh = {*Isoptera/microbiology ; Animals ; *Gastrointestinal Microbiome/genetics ; Metagenome ; *Glycoside Hydrolases/metabolism/chemistry/genetics ; Phylogeny ; *Bacterial Proteins/genetics/metabolism/chemistry ; Models, Molecular ; *Firmicutes/enzymology/genetics ; Substrate Specificity ; Enzyme Stability ; Hydrogen-Ion Concentration ; Amino Acid Sequence ; Temperature ; Kinetics ; }, abstract = {Glycosyl hydrolases (GH) are enzymes involved in the degradation of plant biomass. They are important for biorefineries that aim at the sustainable utilization of lignocellulosic residues to generate value-added products. The termite Syntermes wheeleri gut microbiota showed an abundance of bacteria from the phylum Firmicutes, a phylum with enzymes capable of breaking down cellulose and degrading lignin, facilitating the use of plant materials as a food source for termites. Using bioinformatics techniques, cellobiohydrolases were searched for in the gut metagenome of the termite Syntermes wheeleri, endemic to the Cerrado. After selecting sequences of the target enzymes, termite gut microbiome metatranscriptome data were used as the criteria to choose the GH9 enzyme sequence Exo8574. Here we present the biochemical and structural characterization of Exo8574, a GH9 enzyme that showed activity with the substrate p-nitrophenyl-D-cellobioside (pNPC), consistent with cellobiohydrolase activity. Bioinformatics tools were used to perform phylogeny studies of Exo8574 and to identify conserved families and domains. Exo8574 showed 48.8 % homology to a protein from a bacterium belonging to the phylum Firmicutes. The high-quality three-dimensional (3D) model of Exo8574 was obtained by protein structure prediction AlphaFold 2, a neural network-based method. After the heterologous expression of Exo8574 and its purification, biochemical experiments showed that the optimal activity of the enzyme was at a temperature of 55 ºC and pH 6.0, which was enhanced in the presence of metal ions, especially Fe[2 +]. The estimated kinetic parameters of Exo8574 using the synthetic substrate p-nithrophenyl-beta-D-cellobioside (pNPC) were: Vmax = 9.14 ± 0.2 x10[-5] μmol/min and Km = 248.27 ± 26.35 μmol/L. The thermostability test showed a 50 % loss of activity after 1 h incubation at 55 °C. The secondary structure contents of Exo8574 evaluated by Circular Dichroism were pH dependent, with greater structuring of protein in β-antiparallel and α-helices at pH 6.0. The similarity between the CD results and the Ramachandran plot of the 3D model suggests that a reliable model has been obtained. Altogether, the results of the biochemical and structural characterization showed that Exo8574 is capable of acting on p-nithrophenyl-beta-D-cellobioside (pNPC), a substrate that mimics bonds cleaved by cellobiohydrolases. These findings have significant implications for advancing in the field of biomass conversion while also contributing to efforts aimed at overcoming challenges in developing more efficient cellulase cocktails.}, }
@article {pmid40262432, year = {2025}, author = {Wu, G and Zhang, H and Huang, T and Song, Y and Liu, X and Liu, X and Wang, X and Pei, T and Xu, G and Wang, Z}, title = {Hydraulic and thermal performance trigger the deterministic assembly of water microbiomes: From biogeographical homogenization to machine learning model.}, journal = {Water research}, volume = {282}, number = {}, pages = {123626}, doi = {10.1016/j.watres.2025.123626}, pmid = {40262432}, issn = {1879-2448}, mesh = {*Machine Learning ; *Microbiota ; *Water Microbiology ; Temperature ; Drinking Water/microbiology ; Seasons ; }, abstract = {Water quality at the point of consumption has long been a health issue because of the potential for microbial ecology. However, research on water hydraulic performance remains in its infancy, and in particular, little is known about the effects of thermal performance during winter. This study explored the effects of stagnation and municipal heating on microbial communities in tap water, focusing on spatial and temporal variations in microbial community composition. The results revealed that stagnation significantly alters the microbial community, especially in heating areas, where the temperature exacerbates microbial growth. Furthermore, hydraulic and thermal performance drive deterministic assembly processes in microbial communities, as evidenced by the reductions in β-diversity, normalized stochasticity ratio (NST), and neutral community model (NCM) fit. Machine learning models revealed that stagnation time greater than 8 h results in increased community abundance because of longer exposure to organic matter and nutrients. The study finding illustrate the importance of environmental influences on microbial community dynamics, and provide valuable insights into the water microbial community, particularly in areas with prolonged stagnation.}, }
@article {pmid40261064, year = {2025}, author = {Žuštra, A and Leonard, VR and Holland, LA and Hu, JC and Mu, T and Holland, SC and Wu, LI and Begnel, ER and Ojee, E and Chohan, BH and Richardson, BA and Kinuthia, J and Wamalwa, D and Slyker, J and Lehman, DA and Gantt, S and Lim, ES}, title = {Longitudinal dynamics of the nasopharyngeal microbiome in response to SARS-CoV-2 Omicron variant and HIV infection in Kenyan women and their children.}, journal = {mSystems}, volume = {10}, number = {5}, pages = {e0156824}, pmid = {40261064}, issn = {2379-5077}, support = {R01 HD092311/HD/NICHD NIH HHS/United States ; 390237/CAPMC/CIHR/Canada ; BAA 75D30121C11084/CC/CDC HHS/United States ; 447944/CAPMC/CIHR/Canada ; R01HD092311/NH/NIH HHS/United States ; }, mesh = {Humans ; Female ; *COVID-19/virology/epidemiology/microbiology/complications ; *HIV Infections/microbiology/virology/epidemiology/complications ; *Nasopharynx/microbiology/virology ; Kenya/epidemiology ; *SARS-CoV-2/genetics ; *Microbiota ; Longitudinal Studies ; Adult ; Child ; Male ; Child, Preschool ; Infant ; }, abstract = {UNLABELLED: The nasopharynx and its microbiota are implicated in respiratory health and disease. The interplay between viral infection and the nasopharyngeal microbiome is an area of increased interest. The impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the etiological agent of the coronavirus disease 2019 pandemic, on the nasopharyngeal microbiome among individuals living with HIV is not fully characterized. Here, we describe the nasopharyngeal microbiome before, during, and after SARS-CoV-2 infection in a longitudinal cohort of Kenyan women (21 living with HIV and 14 HIV-uninfected) and their children (18 HIV-exposed, uninfected and 7 HIV-unexposed, uninfected) between September 2021 and March 2022. We show using genomic epidemiology that mother and child dyads were infected with the same strain of the SARS-CoV-2 Omicron variant that spread rapidly across Kenya. We used metagenomic sequencing to characterize the nasopharyngeal microbiome of 20 women and children infected with SARS-CoV-2, six children negative for SARS-CoV-2 but experiencing respiratory symptoms, and 34 timepoint-matched SARS-CoV-2-negative mothers and children. Since individuals were sampled longitudinally before and after SARS-CoV-2 infection, we could characterize the short- (within a week of infection) and longer- (average of 38 days post-infection) term impact of SARS-CoV-2 infection on the nasopharyngeal microbiome. We found that mothers and children had significantly different microbiome composition and bacterial load (P-values < 0.0001). In both mothers and children, the nasopharyngeal microbiome did not differ before and after SARS-CoV-2 infection, regardless of HIV exposure status. Our results indicate that the nasopharyngeal microbiome is resilient to SARS-CoV-2 infection and was not significantly modified by HIV.<br><br>IMPORTANCE: The nasopharyngeal microbiome plays an important role in human health. The degree of impact that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has on the nasopharyngeal microbiome varies among studies and may be influenced by diverse SARS-CoV-2 variants and variations in the microbiome between individuals. Our results show that the nasopharyngeal microbiome was not altered substantially by SARS-CoV-2 infection nor by HIV infection in mothers or HIV exposure in children. Our findings highlight the resilience of the nasopharyngeal microbiome after SARS-CoV-2 infection. These findings advance our understanding of the nasopharyngeal microbiome and its interactions with viral infections.}, }
@article {pmid40261045, year = {2025}, author = {Doing, G and Shanbhag, P and Bell, I and Cassidy, S and Motakis, E and Aiken, E and Oh, J and Adams, MD}, title = {TEAL-Seq: targeted expression analysis sequencing.}, journal = {mSphere}, volume = {10}, number = {5}, pages = {e0098424}, pmid = {40261045}, issn = {2379-5042}, mesh = {Humans ; *Staphylococcus aureus/genetics ; *Microbiota/genetics ; *Staphylococcus epidermidis/genetics ; *Gene Expression Profiling/methods ; Metagenome ; Skin/microbiology ; High-Throughput Nucleotide Sequencing/methods ; *Metagenomics/methods ; }, abstract = {Metagenome sequencing enables the genetic characterization of complex microbial communities. However, determining the activity of isolates within a community presents several challenges, including the wide range of organismal and gene expression abundances, the presence of host RNA, and low microbial biomass at many sites. To address these limitations, we developed "targeted expression analysis sequencing" or TEAL-seq, enabling sensitive species-specific analyses of gene expression using highly multiplexed custom probe pools. For proof of concept, we targeted about 1,700 core and accessory genes of Staphylococcus aureus and S. epidermidis, two key species of the skin microbiome. Two targeting methods were applied to laboratory cultures and human nasal swab specimens. Both methods showed a high degree of specificity, with >90% reads on target, even in the presence of complex microbial or human background DNA/RNA. Targeting using molecular inversion probes demonstrated excellent correlation in inferred expression levels with bulk RNA-seq. Furthermore, we show that a linear pre-amplification step to increase the number of nucleic acids for analysis yielded consistent and predictable results when applied to complex samples and enabled profiling of expression from as little as 1 ng of total RNA. TEAL-seq is much less expensive than bulk metatranscriptomic profiling, enables detection across a greater dynamic range, and uses a strategy that is readily configurable for determining the transcriptional status of organisms in any microbial community.IMPORTANCEThe gene expression patterns of bacteria in microbial communities reflect their activity and interactions with other community members. Measuring gene expression in complex microbiome contexts is challenging, however, due to the large dynamic range of microbial abundances and transcript levels. Here we describe an approach to assessing gene expression for specific species of interest using highly multiplexed pools of targeting probes. We show that an isothermal amplification step enables the profiling of low biomass samples. TEAL-seq should be widely adaptable to the study of microbial activity in natural environments.}, }
@article {pmid40260991, year = {2025}, author = {López-Gálvez, R and Orenes-Piñero, E and Rivera-Caravaca, JM and Pérez-Sanz, F and Ramos-Bratos, MP and Roca, MI and Mandaglio-Collados, D and López-García, C and Gil-Pérez, P and Esteve-Pastor, MA and Marín, F}, title = {Microbial Insights: The Role of Diet in Modulating Gut Microbiota and Metabolites After Acute Coronary Syndrome.}, journal = {Molecular nutrition &amp; food research}, volume = {69}, number = {11}, pages = {e70046}, doi = {10.1002/mnfr.70046}, pmid = {40260991}, issn = {1613-4133}, support = {//Instituto de Salud Carlos III/ ; //Centro de investigaci&#xf3;n Biom&#xe9;dica en Red/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Acute Coronary Syndrome/microbiology/diet therapy/metabolism ; Male ; Female ; Middle Aged ; Dysbiosis/microbiology/diet therapy ; *Diet ; Aged ; Feces/microbiology ; Inflammation ; Case-Control Studies ; }, abstract = {Acute coronary syndrome (ACS) is a leading cause of global mortality, largely due to atherosclerosis influenced by lifestyle factors like diet. Gut microbiota impacts lipid metabolism, inflammation, and endothelial function, all vital in atherosclerosis. Dysbiosis increases intestinal permeability, causing inflammation and plaque instability, elevating cardiac event risk. This study investigates the impact of dietary improvements on gut microbiota and metabolite release in recent ACS patients versus healthy individuals. A cohort of 29 recent ACS patients receiving lipid-lowering therapy and dietary advice was analyzed alongside 56 healthy controls. Dietary habits, serum, and stool samples were collected at admission and after 3 months. Metagenomic analysis of stool and metabolomic analysis of serum were conducted. The results showed bacterial dysbiosis in ACS patients, characterized by a reduction in beneficial genera and an increase in potentially pro-inflammatory bacteria. After 3 months of dietary improvements, three metabolites with anti-inflammatory properties were significantly upregulated. The findings highlight the association between gut microbiota dysbiosis, fatty diets, and inflammation in ACS patients. The observed increase in anti-inflammatory metabolites following dietary changes underscore the following dietary interventions in modulating gut microbiota and improving cardiovascular and metabolic health.}, }
@article {pmid40259731, year = {2025}, author = {Sun, YS and Zhao, L and Zheng, CL and Yan, XT and Li, Y and Gao, XL and Xue, TF and Zhang, YM and Li, ZP and Heller, R and Feng, CG and Xu, C and Wang, K and Qiu, Q}, title = {Convergent musk biosynthesis across host and microbiota in musk deer and muskrat.}, journal = {Zoological research}, volume = {46}, number = {3}, pages = {505-517}, doi = {10.24272/j.issn.2095-8137.2025.094}, pmid = {40259731}, issn = {2095-8137}, mesh = {Animals ; *Deer/microbiology/metabolism ; *Fatty Acids, Monounsaturated/metabolism ; *Microbiota ; Scent Glands/metabolism ; *Arvicolinae/microbiology/metabolism ; }, abstract = {Mammalian scent glands mediate species-specific chemical communication, yet the mechanistic basis for convergent musk production remain incompletely understood. Forest musk deer and muskrat have independently evolved specialized musk-secreting glands, representing a striking case of convergent evolution. Through an integrated multi-omics approach, this study identified cyclopentadecanone as a shared key metabolic precursor in musk from both forest musk deer and muskrat, although downstream metabolite profiles diverged between the two lineages. Single-cell RNA sequencing revealed that these specialized apocrine glands possessed unique secretory architecture and exhibited transcriptional profiles associated with periodic musk production, distinct from those in conventional apocrine glands. Convergent features were evident at the cellular level, where acinar, ductal, and basal epithelial subtypes showed parallel molecular signatures across both taxa. Notably, acinar cells in both species expressed common genes involved in fatty acid and glycerolipid metabolism (e.g., ACSBG1, HSD17B12, HACD2, and HADHA), suggesting a conserved molecular framework for musk precursor biosynthesis. Metagenomic analysis of musk samples further revealed parallel microbial community structures dominated by Corynebacterium and enriched in lipid metabolic pathways. These findings suggest multi-level convergence in musk biosynthesis, from molecular pathways to microbial communities, providing novel insights into mammalian chemical signaling and artificial musk production.}, }
@article {pmid40259344, year = {2025}, author = {Zhang, Q and Hutchison, ER and Pan, C and Warren, MF and Keller, MP and Attie, AD and Lusis, AJ and Rey, FE}, title = {Systems genetics uncovers associations among host amylase locus, gut microbiome, and metabolic traits in mice.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {101}, pmid = {40259344}, issn = {2049-2618}, mesh = {Animals ; Mice ; *Gastrointestinal Microbiome/genetics ; *Amylases/genetics/metabolism ; Genome-Wide Association Study ; Metagenomics/methods ; Male ; Bacteroidetes/genetics/classification/isolation &amp; purification ; Mendelian Randomization Analysis ; Firmicutes/genetics/classification/isolation &amp; purification ; Cecum/microbiology ; }, abstract = {BACKGROUND: Population studies have revealed associations between host genetic and gut microbiome in humans and mice. However, the molecular bases for how host genetic variation impacts the gut microbial community and bacterial metabolic niches remain largely unknown.<br><br>RESULTS: We leveraged 90 inbred hyperlipidemic mouse strains from the hybrid mouse diversity panel (HMDP), previously studied for a variety of cardio-metabolic traits. Metagenomic analysis of cecal DNA followed by genome-wide association analysis identified genomic loci that were associated with microbial enterotypes in the gut. Among these, we detected a genetic locus surrounding multiple amylase genes that were associated with abundances of Firmicutes (Lachnospiraceae family) and Bacteroidetes (Muribaculaceae family) taxa encoding distinct starch and sugar degrading capabilities. The genetic variants at the amylase gene locus were associated with distinct gut microbial communities (enterotypes) with different predicted metabolic capacities for carbohydrate degradation. Mendelian randomization analysis revealed host phenotypes, including liver fibrosis and plasma HDL-cholesterol levels, that were associated with gut microbiome enterotypes.<br><br>CONCLUSIONS: This work reveals novel relationships among host genetic variation, gut microbial enterotypes, and host metabolic traits and supports the notion that variation of host amylase may represent a key determinant of gut microbiome in mice. Video Abstract.}, }
@article {pmid40258842, year = {2025}, author = {Duru, IC and Lecomte, A and Laine, P and Shishido, TK and Suppula, J and Paulin, L and Scheperjans, F and Pereira, PAB and Auvinen, P}, title = {Comparison of phage and plasmid populations in the gut microbiota between Parkinson's disease patients and controls.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {13723}, pmid = {40258842}, issn = {2045-2322}, support = {NNF22OC0080109//Novo Nordisk Foundation/ ; }, mesh = {Humans ; *Parkinson Disease/microbiology/virology ; *Gastrointestinal Microbiome/genetics ; *Bacteriophages/genetics/isolation &amp; purification ; Aged ; *Plasmids/genetics ; Male ; Female ; Middle Aged ; Feces/microbiology/virology ; Case-Control Studies ; Metagenomics/methods ; Machine Learning ; }, abstract = {The aging population worldwide is on the rise, leading to a higher number of Parkinson's disease (PD) cases each year. PD is presently the second most prevalent neurodegenerative disease, affecting an estimated 7-10 million individuals globally. This research aimed to identify mobile genetic elements in human fecal samples using a shotgun metagenomics approach. We identified over 44,000 plasmid contigs and compared plasmid populations between PD patients (n = 68) and controls (n = 68). Significant associations emerged between groups (control vs PD) based on plasmid alpha and beta diversity. Moreover, the gene populations present on plasmids displayed marked differences in alpha and beta diversity between PD patients and controls. We identified a considerable number of phage contigs that were differentially abundant in the two groups. We also developed a predictive machine learning model based on phage abundance data, achieving a mean Area Under the Curve (AUC) of 0.74 with a standard deviation of 0.105 and a mean F1 score of 0.68 with a standard deviation of 0.14 across cross-validation folds, indicating moderate discriminatory power. Additionally, when tested on external data, the model yielded an AUC of 0.74 and an F1 score of 0.8, further demonstrating the predictive potential of phage populations in Parkinson's disease. Further, we improved the continuity and identification of the protein coding regions of the phage contigs by implementing alternative genetic codes.}, }
@article {pmid40258509, year = {2025}, author = {Fang, C and Zhu, J and Xu, H and Qian, M and Jin, Y}, title = {Polystyrene microplastics and cypermethrin exposure interfered the complexity of antibiotic resistance genes and induced metabolic dysfunction in the gut of adult zebrafish.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {374}, number = {}, pages = {126288}, doi = {10.1016/j.envpol.2025.126288}, pmid = {40258509}, issn = {1873-6424}, mesh = {Animals ; *Zebrafish ; *Pyrethrins/toxicity ; *Microplastics/toxicity ; *Water Pollutants, Chemical/toxicity ; *Gastrointestinal Microbiome/drug effects ; *Polystyrenes/toxicity ; *Drug Resistance, Microbial/genetics ; Female ; }, abstract = {Environmental pollutants such as microplastics (MPs) and pesticides are becoming prevalent in aquatic ecosystems, posing risks to wildlife and human health. This study investigated the toxicological effects of polystyrene microplastics (PS-MPs) and cypermethrin (CYP) on adult female zebrafish (Danio rerio), focusing on intestinal microenvironment. Adsorption kinetics experimental results showed that PS-MPs can adsorb a certain amount of CYP on its surface, thereby forming a new type of composite pollutant. After exposure to red fluorescent PS-MPs for 4 days, it was found that the PS-MPs could enter the zebrafish and accumulate in the intestines. Five-month-old female zebrafish were exposed to PS-MPs, CYP, and a mixture of both for 21 days. After exposure, feces were collected and analyzed using metagenomic sequencing to determine microbial composition and functional changes. Metagenomic sequencing of naturally excreted feces showed that co-exposure synergistically reduced α-diversity and shifted community structure, with marked losses of beneficial Fusobacteriota, Firmicutes and Cetobacterium somerae and enrichment of pathogenic Preplasmiviricota. Functional annotation indicated that PS-MPs alone up-regulated glycoside hydrolases and glycosyl-transferases, whereas CYP and the co-exposure group suppressed a great number of the top 50 carbohydrate-active enzymes and decreased secondary metabolic pathways linked to amino-acid, lipid and carbohydrate metabolism pathways. Antibiotic-resistance gene (ARGs) profiling identified 57 ARG types (such as sul1, adeF, lnuC and mphA) after co-exposure. Finally, key genes related to amino acid metabolism, carbohydrate metabolism, and lipid metabolism in intestinal tissue were significantly altered. Collectively, our data demonstrated that PS-MPs and CYP exposure amplified gut dysbiosis, metabolic dysfunction and ARG complexity in zebrafish. Overall, the study highlighted the potential risks of combined environmental pollutants on intestinal microbiota, with implications for ecosystem health.}, }
@article {pmid40255076, year = {2025}, author = {Buttler, L and Velázquez-Ramírez, DA and Tiede, A and Conradi, AM and Woltemate, S and Geffers, R and Bremer, B and Spielmann, V and Kahlhöfer, J and Kraft, ARM and Schlüter, D and Wedemeyer, H and Cornberg, M and Falk, C and Vital, M and Maasoumy, B}, title = {Distinct clusters of bacterial and fungal microbiota in end-stage liver cirrhosis correlate with antibiotic treatment, intestinal barrier impairment, and systemic inflammation.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2487209}, pmid = {40255076}, issn = {1949-0984}, mesh = {Humans ; Male ; Female ; Middle Aged ; *Gastrointestinal Microbiome/drug effects ; *Bacteria/classification/genetics/isolation &amp; purification/drug effects ; *Anti-Bacterial Agents/therapeutic use/adverse effects ; Aged ; Dysbiosis/microbiology ; *Fungi/classification/isolation &amp; purification/genetics ; *Inflammation/microbiology ; *Liver Cirrhosis/microbiology ; *Mycobiome ; Prospective Studies ; Metagenomics ; Intestinal Mucosa/microbiology ; *End Stage Liver Disease/microbiology/drug therapy ; Adult ; }, abstract = {Decompensated liver cirrhosis (dLC) is associated with intestinal dysbiosis, however, underlying reasons and clinical consequences remain largely unexplored. We investigated bacterial and fungal microbiota, their relation with gut barrier integrity, inflammation, and cirrhosis-specific complications in dLC-patients. Competing-risk analyses were performed to investigate clinical outcomes within 90 days. Samples were prospectively collected from 95 dLC-patients between 2017 and 2022. Quantitative metagenomic analyses clustered patients into three groups (G1-G3) showing distinct microbial patterns. G1 (n = 39) displayed lowest diversity and highest Enterococcus abundance, G2 (n = 24) was dominated by Bifidobacteria, G3 (n = 29) was most diverse and clustered most closely with healthy controls (HC). Of note, bacterial concentrations were significantly lower in cirrhosis compared with HC, especially for G1 that also showed the lowest capacity to produce short chain fatty acids and secondary bile acids. Consequently, fungal overgrowth, dominated by Candida spp. (51.63%), was observed in G1. Moreover, G1-patients most frequently received antibiotics (n = 33; 86.8%), had highest plasma-levels of Zonulin (p = 0.044) and a proinflammatory cytokine profile along with numerically higher incidences of subsequent infections (p = 0.09). In conclusion, distinct bacterial clusters were observed at qualitative and quantitative levels and correlated with fungal abundances. Antibiotic treatment significantly contributed to dysbiosis, which translated into intestinal barrier impairment and systemic inflammation.}, }
@article {pmid40254830, year = {2025}, author = {Pham, CM and Rankin, TJ and Stinear, TP and Walsh, CJ and Ryan, FJ}, title = {TaxSEA: rapid interpretation of microbiome alterations using taxon set enrichment analysis and public databases.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {2}, pages = {}, pmid = {40254830}, issn = {1477-4054}, support = {GNT1194325//National Health and Medical Research Council of Australia/ ; }, mesh = {*Microbiota ; Humans ; *Software ; *Metagenomics/methods ; Diabetes Mellitus, Type 2/microbiology/genetics ; *Databases, Genetic ; *Computational Biology/methods ; Inflammatory Bowel Diseases/microbiology/genetics ; Metagenome ; }, abstract = {Microbial communities are essential regulators of ecosystem function, with their composition commonly assessed through DNA sequencing. Most current tools focus on detecting changes among individual taxa (e.g. species or genera), however in other omics fields, such as transcriptomics, enrichment analyses like gene set enrichment analysis are commonly used to uncover patterns not seen with individual features. Here, we introduce TaxSEA, a taxon set enrichment analysis tool available as an R package, a web portal (https://shiny.taxsea.app), and a Python package. TaxSEA integrates taxon sets from five public microbiota databases (BugSigDB, MiMeDB, GutMGene, mBodyMap, and GMRepoV2) while also allowing users to incorporate custom sets such as taxonomic groupings. In silico assessments show TaxSEA is accurate across a range of set sizes. When applied to differential abundance analysis output from inflammatory bowel disease and type 2 diabetes metagenomic data, TaxSEA can rapidly identify changes in functional groups corresponding to known associations. We also show that TaxSEA is robust to the choice of differential abundance analysis package. In summary, TaxSEA enables researchers to efficiently contextualize their findings within the broader microbiome literature, facilitating rapid interpretation, and advancing understanding of microbiome-host and environmental interactions.}, }
@article {pmid40254701, year = {2025}, author = {Zaharuddin, AM and Muslim, A and Aazmi, S and Idorus, MY and Almabhouh, FA and Lim, SY and Loganathan, AL and Ayub, Q and Chong, CW and Khalil, KA and Ghani, NA and Lim, SM and Ramasamy, K}, title = {Probiotic Lactobacillus rhamnosus GG Alleviates Prehypertension and Restores Gut Health and Microbiota in NaCl-Induced Prehypertensive Rats.}, journal = {Probiotics and antimicrobial proteins}, volume = {}, number = {}, pages = {}, pmid = {40254701}, issn = {1867-1314}, abstract = {Probiotics could be used as adjuvant treatments in prehypertension management to restore gut microbiota dysbiosis caused by a high-salt diet. This study investigated the antihypertensive effects of the probiotic Lactobacillus rhamnosus strain GG (LGG) on high-salt diet-induced prehypertensive rats. Eighteen Sprague-Dawley rats were assigned equally into three groups: normotensive fed on a normal diet (ND), prehypertensive induced on a 4% NaCl high-salt diet (HSD), and prehypertensive induced on an HSD treated with LGG at 1 × 10[9] CFU daily for 8 weeks (LGG). Weekly changes in water, food, body weight, diastolic blood pressure (DBP), systolic blood pressure (SBP), and mean arterial pressure (MAP) were monitored. Serum levels of Na, K, Cl, ALB, Ca, and TP were measured at the end of treatment, along with morphological and histomorphometric changes in the small intestine. Stool samples collected before (W0) and 8 weeks after treatment (W8) were sequenced for bacterial 16S rDNA metagenomics. Probiotic LGG significantly reduces average DBP, SBP, and MAP while improving gut integrity through intact intestine morphology, higher villus heights, and a V/C ratio. At the genus level, the LGG group's gut microbiota composition is more similar to the HSD profile at W0 but shifts to the ND profile after treatment at W8. Thus, probiotic LGG lowers blood pressure indices, improves serum biochemistry profile, restores small intestinal integrity barrier, and modulates gut microbiota profile, indicating its potential as an adjuvant treatment for prehypertension and the significance of gut health in blood pressure regulation.}, }
@article {pmid40254251, year = {2025}, author = {Chang, FM and Chen, YH and Hsu, PS and Wu, TH and Sung, IH and Wu, MC and Nai, YS}, title = {RNA metagenomics revealed insights into the viromes of honey bees (Apis mellifera) and Varroa mites (Varroa destructor) in Taiwan.}, journal = {Journal of invertebrate pathology}, volume = {211}, number = {}, pages = {108341}, doi = {10.1016/j.jip.2025.108341}, pmid = {40254251}, issn = {1096-0805}, mesh = {Animals ; Bees/virology/parasitology ; *Varroidae/virology ; *Virome ; Metagenomics ; Taiwan ; *RNA Viruses/isolation &amp; purification/genetics ; *Insect Viruses/genetics/isolation &amp; purification ; }, abstract = {The honey bee (Apis mellifera) is a vital pollinator for crops. However, they are infested by an ecto-parasite that has spread worldwide, Varroa mite (Varroa destructor). The Varroa mite is a vector of various western honey bee viruses. In this study, the prevalence of seven honey bee viruses (Deformed wing virus, Lake Sinai virus, Acute bee paralysis virus, Sacbrood virus, Kashmir bee virus, Black queen cell virus, Israeli acute paralysis virus), was screened with the honey bees, which were collected from fourteen apiaries from March 2023 to January 2024, and the Varroa mites, which were collected from two apiaries from July to October 2023 by using RT-PCR. Subsequently, metagenomic analyses were conducted on seven honey bee samples and two Varroa mite samples using next-generation sequencing with poly-A capture and rRNA depletion library construction methods. The results showed that 50% to 85.7% of honey bee viruses in each sample were detected by both methods, with up to three additional viruses identified when combining the two approaches. These findings underscore the importance of integrating both methods for comprehensive virome analysis. According to the virome analysis, 28 honey bee viruses were identified in honey bees and 11 in Varroa mites. Among these, 23 viruses were newly recorded in Taiwanese honey bee populations. Notably, three of the newly recorded viruses, Acute bee paralysis virus, Israeli acute paralysis virus, and Apis mellifera filamentous virus, are known to cause symptoms in honey bees, posing potential risks to their health. Six of these viruses were also detected in Varroa mites, highlighting their role in viral transmission. This study represents the first virome analysis of honey bees and Varroa mites in Taiwan, providing critical insights into honey bee health and establishing a foundation for future health assessment indices and mitigation strategies.}, }
@article {pmid40254113, year = {2025}, author = {Bartáková, V and Bryjová, A and Polačik, M and Alila, DO and Nagy, B and Watters, B and Bellstedt, D and Blažek, R and Žák, J and Reichard, M}, title = {Phylogenomics and population genomics of Nothobranchius in lowland Tanzania: species delimitation and comparative genetic structure.}, journal = {Molecular phylogenetics and evolution}, volume = {208}, number = {}, pages = {108357}, doi = {10.1016/j.ympev.2025.108357}, pmid = {40254113}, issn = {1095-9513}, mesh = {Animals ; Tanzania ; *Phylogeny ; Polymorphism, Single Nucleotide ; *Genetics, Population ; Genetic Variation ; Sequence Analysis, DNA ; Metagenomics ; Killifishes ; }, abstract = {Annual killifishes of the genus Nothobranchius are widespread across East Africa, with a particularly high biodiversity in lowland Tanzania. While they are typically found in ephemeral pools, the pools vary greatly in size, connectivity and inundation patterns. It was previously suggested that main river channels formed significant barriers to Nothobranchius dispersal. Here, we study the distribution of genetic lineages in an equatorial part of their range where main river channels that may act as barriers occur and closely related lineages frequently coexist in secondary contact zones. We used single-nucleotide polymorphism (SNP) dataset from double-digest restriction site-associated DNA (ddRAD) sequencing to investigate how genetic diversity is structured in Nothobranchius species from the coastal lowlands of Tanzania. Our analyses resolved some uncertain phylogenetic relationships within the N. melanospilus and N. guentheri species groups and placed N. flammicomantis outside the Coastal clade. Rather than a shared intraspecific genetic diversity pattern across four coexisting and widely distributed species, we found highly diverse patterns of intra-specific genetic structure among N. eggersi, N. janpapi, N. melanospilus and N. ocellatus. Populations of Nothobranchius species from the humid coastal lowlands of Tanzania are therefore structured, but not constrained by barriers formed by river channels or by basins - in contrast to Nothobranchius species from the dry part of their distribution. Some of the genetic relationships determined call for a re-evaluation of taxonomic delimitations.}, }
@article {pmid40253770, year = {2025}, author = {Zhu, Y and Tian, Q and Huang, Q and Wang, J}, title = {Bile-processed Rhizoma Coptidis alleviates type 2 diabetes mellitus through modulating the gut microbiota and short-chain fatty acid metabolism.}, journal = {International immunopharmacology}, volume = {156}, number = {}, pages = {114645}, doi = {10.1016/j.intimp.2025.114645}, pmid = {40253770}, issn = {1878-1705}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Diabetes Mellitus, Type 2/drug therapy/metabolism/microbiology ; Male ; *Drugs, Chinese Herbal/therapeutic use/pharmacology ; Rats ; *Fatty Acids, Volatile/metabolism ; Rats, Sprague-Dawley ; *Diabetes Mellitus, Experimental/drug therapy/metabolism ; *Hypoglycemic Agents/pharmacology/therapeutic use ; Bile/metabolism ; Diet, High-Fat ; Glucagon-Like Peptide 1/metabolism ; Insulin Resistance ; Blood Glucose/metabolism ; Coptis chinensis ; }, abstract = {BACKGROUND: Bile-Processed Rhizoma Coptidis (BPRC) is a processed products of Rhizoma Coptidis (RC) commonly used to treat type 2 diabetes mellitus (T2DM). However, the synergistic mechanism of its processing remains unknown. Current research indicates that the gut microbiota and its metabolites, such as short-chain fatty acids (SCFAs), are closely associated with the progression of T2DM.<br><br>PURPOSE: This study aims to investigate the effects of BPRC on the gut microbiota and its metabolite SCFAs in T2DM rats.<br><br>METHODS: T2DM rat model was induced by a high-fat diet (HFD) combined with streptozotocin (STZ), followed by a 4-week treatment with BPRC to observe its therapeutic effects. The impact of BPRC on the gut microbiota was studied through metagenomic sequencing. Quantitative analysis of SCFAs was conducted using GC-MS. Western blot and quantitative real-time PCR (qRT-PCR) were conducted to investigate the potential mechanisms of BPRC.<br><br>RESULTS: BPRC significantly improved insulin resistance in T2DM rats, downregulated levels of pancreatic cell apoptosis factors, and upregulated the abundance of Bacteroides uniformis, Bacteroides sp A1C1, Anaerostipes caccae, Alistipes finegoldii and Blautia sp.N6H1-15 in T2DM rats. Additionally, BPRC increased the levels of seven SCFAs in the intestines of T2DM rats. It activated intestinal TGR5, GPR41, GPR43, and GPR109a receptors, collectively upregulating GLP-1 protein expression, and exerted therapeutic effects on T2DM.<br><br>CONCLUSION: The results indicate that the synergistic mechanism of BPRC in treating T2DM is associated with modulating the gut microbiota, increasing SCFAs content in the intestines, and regulating intestinal GLP-1 production.}, }
@article {pmid40253169, year = {2025}, author = {Aryal, A and Nwachukwu, ID and Aryee, ANA}, title = {Examining the impact of crops and foods biofortified with micronutrients on the gut microbiome.}, journal = {Food research international (Ottawa, Ont.)}, volume = {209}, number = {}, pages = {116189}, doi = {10.1016/j.foodres.2025.116189}, pmid = {40253169}, issn = {1873-7145}, mesh = {*Gastrointestinal Microbiome/physiology ; *Micronutrients ; Humans ; *Crops, Agricultural ; *Biofortification ; *Food, Fortified ; Animals ; }, abstract = {Micronutrient deficiencies (MNDs) impact more than three billion individuals worldwide, particularly those in impoverished and marginalized communities, leading to adverse long-term health consequences. Biofortification, which focusses on enhancing the nutrient density of food crops, presents a promising strategy to address this challenge. Recent studies involving both model organisms and human subjects have demonstrated that, beyond remedying common dietary insufficiencies, micronutrients can modulate the composition and functionality of the gut microbiome. The microbiota, in turn, utilize these micronutrients, facilitating digestion, synthesizing essential nutrients, and modulating immune responses, thereby establishing a bidirectional relationship known as the micronutrient-microbiome axis. Numerous studies have also documented significant variations in these interactions, highlighting the complex dynamics of the micronutrient-microbiome relationship. The composition and interactions of the microbiota have been investigated using various methodologies, including 16S rRNA gene sequencing, RT-PCR, metagenomics, and metabolomics. This review explores recent advancements in understanding the reciprocal relationship between micronutrient levels and the gut microbiome, emphasizing key findings that provide critical insights for the development of targeted dietary strategies aimed at alleviating MNDs and improving overall health.}, }
@article {pmid40252793, year = {2025}, author = {Yang, R and Guo, S and Huo, L and Yang, G and Tian, S}, title = {Impact of watershed-scale land restoration on soil microbial communities and their functions: Insights from metagenomic analysis.}, journal = {Environmental research}, volume = {277}, number = {}, pages = {121609}, doi = {10.1016/j.envres.2025.121609}, pmid = {40252793}, issn = {1096-0953}, mesh = {*Soil Microbiology ; China ; Metagenomics ; Phosphorus/metabolism ; Nitrogen/metabolism ; *Microbiota ; Soil/chemistry ; *Environmental Restoration and Remediation ; Carbon/metabolism ; Agriculture ; Biodiversity ; }, abstract = {Land restoration in the gully regions of China's Loess Plateau has significantly altered soil conditions and farming practices, yet its impact on soil microbes remains unclear. This study applied metagenomic sequencing and correlation analysis to examine microbial community shifts and key genes involved in carbon, nitrogen, and phosphorus cycling. Results show increased biodiversity and microbial activity, especially downstream, enhancing carbon metabolism and ecosystem resilience. Phosphorus activation improved, with related gene abundance rising by 27.45 %-52.57 %, facilitating phosphorus availability. Nitrogen cycling showed enhanced nitrification and nitrogen fixation, with reduced denitrification, promoting nitrogen retention. Soil organic carbon, total nitrogen, ammonium nitrogen, and available phosphorus (AP), particularly AP, strongly influenced microbial dynamics. These findings highlight the positive role of land restoration in improving soil health and nutrient cycling, supporting sustainable agriculture.}, }
@article {pmid40252750, year = {2025}, author = {Yang, M and Peng, L and Mu, M and Yang, F and Li, Z and Han, B and Zhang, K}, title = {Significant effects of earthworm species on antibiotic resistome in livestock manure as revealed by metagenomic analysis.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {374}, number = {}, pages = {126277}, doi = {10.1016/j.envpol.2025.126277}, pmid = {40252750}, issn = {1873-6424}, mesh = {Animals ; *Oligochaeta ; *Manure/microbiology/analysis ; Metagenomics ; Livestock ; *Drug Resistance, Microbial/genetics ; Composting ; Anti-Bacterial Agents ; Metagenome ; Gastrointestinal Microbiome ; Bacteria/genetics ; }, abstract = {Animal-derived antibiotic resistance genes (ARGs) have emerged as a critical threat, while vermicomposting has been recognized as an effective strategy for reducing ARGs. However, the efficacy of different earthworm species in reducing ARGs remains poorly understood. In this study, 72 vermicompost and earthworm gut samples were collected from various earthworm farms to evaluate the impact of vermicomposting with different earthworm species on ARGs via metagenomic analysis. Approximately 28 ARG types were detected in gut and vermicompost samples. There were significant differences in ARGs among the four species of earthworm composting systems (p < 0.05), and each species possessed its dominant ARGs and microbes. Proteobacteria represented the predominant bacterial phylum within the gut microbiota of Pheretima guillelmi (46.89 %) and Eisenia fetida (48.42 %), whereas Euryarchaeota (36.71 %) and Actinobacteria (39.42 %) were the most abundant in Perionyx excavatus and Eudrilus eugeniae, respectively. The overall abundance of ARGs in vermicompost processed by Eisenia fetida (0.18 copies16S rRNA gene copies) was lower than that observed in other earthworm species (0.23-0.39 copies/16S rRNA gene copies), with gut microbial identified as a key determinant of variations in ARG reduction. These findings provide valuable insights into selecting suitable earthworm species to promote ARG degradation, thus contributing to the decrease in ARG dissemination risks in agricultural ecosystems.}, }
@article {pmid40252553, year = {2025}, author = {Bariod, L and Fuentes, E and Millet, M and White, J and Jacquiod, S and Moreau, J and Monceau, K}, title = {Exposure to pesticides is correlated with gut microbiota alterations in a farmland raptor.}, journal = {Environment international}, volume = {199}, number = {}, pages = {109436}, doi = {10.1016/j.envint.2025.109436}, pmid = {40252553}, issn = {1873-6750}, mesh = {*Gastrointestinal Microbiome/drug effects ; *Pesticides/toxicity ; Animals ; *Environmental Exposure ; Agriculture ; }, abstract = {The gut microbiota is crucial for host health and can be impacted by various environmental disruptions, yet the effects of multiple pesticide exposures on farmland organisms' microbiomes remain largely unexplored. We assessed microbiota changes in a wild apex predator exposed to multiple pesticides in agricultural landscapes. Pesticides, including acetochlor and quinoxyfen, which are supposed to be banned, were significantly positively correlated with certain key bacteria from Actinobacteria, Alphaproteobacteria and Gammaproteobacteria classes. Our results light up the potential collateral effect of pesticides on gut bacterial assemblages through unknown mechanisms. These effects could result in dysbiosis and the promotion of potential pathogens and/or the selection of bacteria that might allow the organism to detoxify the organism. Although formal metagenomic analyses would be required soon, these microbial shifts underline the broader ecological consequences of pesticide exposure, emphasising the need for integrated biodiversity conservation and ecosystem management to protect environmental and public health.}, }
@article {pmid40252413, year = {2025}, author = {Okamura, T and Hasegawa, Y and Ohno, Y and Saijo, Y and Nakanishi, N and Honda, A and Hamaguchi, M and Takano, H and Fukui, M}, title = {Oral exposure to nanoplastics and food allergy in mice fed a normal or high-fat diet.}, journal = {Chemosphere}, volume = {379}, number = {}, pages = {144401}, doi = {10.1016/j.chemosphere.2025.144401}, pmid = {40252413}, issn = {1879-1298}, mesh = {Animals ; *Food Hypersensitivity/immunology ; *Diet, High-Fat/adverse effects ; Mice ; Mice, Inbred BALB C ; Gastrointestinal Microbiome/drug effects ; Ovalbumin/immunology ; Immunoglobulin E/blood ; *Microplastics/toxicity ; Administration, Oral ; *Polystyrenes/toxicity ; Female ; }, abstract = {The global prevalence of food allergies, particularly IgE-mediated responses, is increasing at an alarming rate. This trend is likely driven by environmental factors such as nanoplastics (NPs) ingestion and the westernization of dietary and lifestyle habits. This study examines the impact of polystyrene nanoplastics (PS-NPs) on ovalbumin (OVA)-induced food allergies in mice subjected to either a normal diet (ND) or a high-fat diet (HFD). BALB/c mice were stratified into eight groups based on dietary regimen, NP exposure, and OVA sensitization. Food allergy was induced via OVA administration, and multiple physiological and immunological parameters were evaluated, including body weight, intestinal permeability, cytokine profiles, gut microbiota composition, and small intestinal gene expression. Mice in the HFD + OVA + NP group exhibited significant increases in intestinal permeability, diarrhea severity, and serum OVA-specific IgE levels compared to other groups. Flow cytometric analysis revealed an expansion of innate lymphoid cells (ILC2 and ILC1) within the lamina propria of the small intestine. Shotgun metagenomic sequencing demonstrated gut microbiota dysbiosis, characterized by a reduction in beneficial bacterial populations in the HFD + OVA + NP cohort. Weighted Gene Co-Expression Network Analysis (WGCNA) identified a negative correlation between NPs exposure or OVA sensitization and the expression of Slc1a1, Slc5a8, and Mep1a, while a positive correlation was observed with Aa467197 expression. These findings indicate that oral exposure to PS-NPs exacerbates OVA-induced food allergies, particularly in the context of an HFD, through mechanisms involving increased intestinal permeability, gut microbial dysbiosis, and gene expression modulation. This study highlights the potential health hazards posed by environmental microplastic contamination and its possible contribution to the escalating incidence of food allergies.}, }
@article {pmid40252307, year = {2025}, author = {Qian, L and Jiang, J and Zhang, Y and Huang, X and Che, Z and Chen, G and Liu, S}, title = {Sublethal exposure to boscalid induced respiratory abnormalities and gut microbiota dysbiosis in adult zebrafish.}, journal = {Aquatic toxicology (Amsterdam, Netherlands)}, volume = {283}, number = {}, pages = {107370}, doi = {10.1016/j.aquatox.2025.107370}, pmid = {40252307}, issn = {1879-1514}, mesh = {Animals ; *Zebrafish/microbiology/physiology ; *Gastrointestinal Microbiome/drug effects ; *Water Pollutants, Chemical/toxicity ; *Dysbiosis/chemically induced/veterinary ; Gills/drug effects ; RNA, Ribosomal, 16S/genetics ; Bacteria/drug effects ; }, abstract = {Boscalid (BO), one of the frequently detected fungicides of succinate dehydrogenase inhibitor in water environments, has unknown effects on the respiratory function and gut health of aquatic organisms. Therefore, zebrafish were exposed to BO solutions (0.01-1.0 mg/L) for 21 days to assess its effects on zebrafish respiration and intestinal microbiota in this study. The results showed that exposure to 0.1 and 1.0 mg/L BO for 21 days resulted in zebrafish exhibiting aggregation of gill filaments, reduction of mucous cells, and significantly decreased opercular movement, linked to a marked decline in the activity of respiratory chain complex II. 16S rRNA gene sequencing revealed significant changes in the intestinal microbiota composition of zebrafish exposed to 1.0 mg/L BO. Specifically, the relative abundance of beneficial bacteria (Cetobacterium) was markedly reduced, while pathogenic bacteria (such as Ralstonia, Legionella, Acinetobacter, Escherichia/Shigella) associated with energy metabolism and immune pathways in zebrafish showed a significant increase in relative abundance. Accordingly, metagenomic functional prediction analysis further revealed the potential impact of BO-induced gut microbiota changes on energy metabolism and immune pathways in zebrafish. Furthermore, histopathological analysis of intestinal tissues revealed that exposure to BO resulted in necrosis and shedding of epithelial cells, as well as a decrease in goblet cell count, which exacerbated adverse effects on intestinal health. In conclusion, sublethal exposure to BO affects the respiratory function and intestinal health of zebrafish. Therefore, the impact of BO in aquatic environments on fish health warrants attention.}, }
@article {pmid40252261, year = {2025}, author = {Li, B and Liang, C and Xu, B and Song, P and Liu, D and Zhang, J and Gu, H and Jiang, F and Gao, H and Cai, Z and Zhang, T}, title = {Extreme winter environment dominates gut microbiota and metabolome of white-lipped deer.}, journal = {Microbiological research}, volume = {297}, number = {}, pages = {128182}, doi = {10.1016/j.micres.2025.128182}, pmid = {40252261}, issn = {1618-0623}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Deer/microbiology/metabolism ; *Seasons ; *Metabolome ; RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics ; Fatty Acids, Volatile/metabolism ; Tibet ; Feces/microbiology ; Metabolomics ; Phylogeny ; }, abstract = {Qinghai-Tibet Plateau (QTP) is marked by harsh environments that drive the evolution of unique nutrient metabolism mechanism in indigenous animal gut microbiotas. Yet, responses of these microbiotas to different extreme environments remain poorly understood. White-lipped deer (Przewalskium albirostris), a native endangered species in the QTP, serves as an ideal model to study how gut microbiotas adapt to season and human disturbances. Here, a multi-omics integrated analysis of 16S rRNA, metagenomics, and untargeted metabolomics was performed to investigate the composition, function, and metabolic characteristics of gut microbiota in White-lipped deer across different seasons and living environments. Our results revealed that extreme winter environment dominated the composition, function, and metabolism of gut microbiota in white-lipped deer. The white-lipped deer exhibited an enriched gut microbiota associated with producing short-chain fatty acids in winter, with core feature genera including norank_o_Rhodospirillales, Rikenellaceae_RC9_gut_group, and unclassified_c_Clostridia. However, potential pathogenic bacteria and few short-chain fatty acid producers, with core feature genera including norank_f_p-2534-18B5_gut_group, Cellulosilyticum, and Paeniclostridium, showed enrichment in captivity. Pathways associated with carbohydrate metabolism, amino acid metabolism, and immune regulation showed enrichment in winter group as an adaptation to the cold and food scarcity. Among these, Rikenellaceae_RC9_gut_group and unclassified_c_Clostridia contributed significantly to these metabolic pathways. The gut microbiota of white-lipped deer exhibited enrichment in pathways related to intestinal inflammation and enhanced immune regulation to alleviate the stress of captivity. Among these, norank_f_p-2534-18B5_gut_group contributed the most to these pathways. Butyric, valeric, and valproic acids were significantly more abundant in the winter group, while 3-hydroxybutyric and (S)-beta-aminoisobutyric acids were higher in the captive group. Furthermore, enriched metabolites and associated pathways in both groups further supported the inferences on metagenomic functions. This study confirms the key role of specific gut microbiota in adapting to high-altitude winters and anthropogenic disturbances, emphasizing its importance for environmental resilience in wild, high-altitude mammals.}, }
@article {pmid40250281, year = {2025}, author = {Chen, Y and Hu, S and Hu, B and Li, Y and Chen, Z}, title = {Functional insights into microbial community dynamics and resilience in mycorrhizal associated constructed wetlands under pesticide stress.}, journal = {Journal of hazardous materials}, volume = {492}, number = {}, pages = {138315}, doi = {10.1016/j.jhazmat.2025.138315}, pmid = {40250281}, issn = {1873-3336}, mesh = {*Wetlands ; *Mycorrhizae/drug effects/genetics/physiology ; *Pesticides/toxicity ; *Microbiota/drug effects ; Soil Microbiology ; Stress, Physiological ; Bacteria/genetics ; }, abstract = {Arbuscular mycorrhizal fungi (AMF) are critical mutualistic symbionts in most terrestrial ecosystems, where they facilitate nutrient acquisition, enhance plant resilience to environmental stressors, and shape the surrounding microbiome. However, its contributions (especially for microorganisms) to constructed wetlands (CWs) under pesticide stress remain poorly understood. This study investigated the effects of AMF on microbial community composition, diversity, metabolic pathways, and functional genes by metagenomics in CWs exposed to pesticides stress. Using comparative analyses of AMF-colonized and non-colonized CWs, we found that AMF enhanced overall microbial diversity, as evidenced by increases of 2.22 % (Chao1) and 2.83 % (observed species). Under fungicide stress, nitrogen-cycling microorganisms (e.g., Nitrososphaerota and Mucoromycota) increased in relative abundance, while carbon cycle-related microorganisms (e.g., Pseudomonadota and Bacteroidota) generally declined. AMF colonization improved microbial resilience, demonstrated by a 312 % rise in Rhizophagus abundance and significant increases in phosphorus-cycling microorganisms (e.g., Bradyrhizobium and Mesorhizobium). Functional gene analysis further revealed that AMF helped mitigate fungicide-induced reductions in genes related to nitrogen and carbon cycling, lowering the average decline rates to 4.02 % and 1.44 %, respectively, compared to higher rates in non-AMF treatments. In summary, these findings highlight the crucial role of AMF in enhancing pesticide stress resilience, maintaining microbial community stability, and improving the bioremediation capacity of CWs.}, }
@article {pmid40250268, year = {2025}, author = {Yang, JH and Huang, DQ and Wu, GG and Han, NN and Fan, NS and Jin, RC}, title = {Quorum sensing-mediated microecological homeostasis in anammox consortia.}, journal = {Journal of hazardous materials}, volume = {492}, number = {}, pages = {138285}, doi = {10.1016/j.jhazmat.2025.138285}, pmid = {40250268}, issn = {1873-3336}, mesh = {*Quorum Sensing ; Homeostasis ; *Ammonium Compounds/metabolism ; *Microbial Consortia ; Oxidation-Reduction ; Nitrogen/metabolism ; 4-Butyrolactone/analogs &amp; derivatives/pharmacology ; Bioreactors/microbiology ; Bacteria/metabolism/genetics ; Anaerobiosis ; }, abstract = {Quorum sensing (QS) mediated by signal molecules regulates bacterial communication and further affects the performance and microbial physiological characteristics of anaerobic ammonium oxidation (anammox) process. The potential application of low concentrations of typical exogenous signal molecules into maintaining the long-term homeostasis of anammox consortia were evaluated in this study. The results of 150-d continuous-flow experiment showed that 30 μg L[-1]N-hexanoyl-homoserine lactone (C6-HSL) and diffusible signaling factor (DSF) could maintain the stable nitrogen removal efficiency of anammox systems (90.3 ± 3.6 % and 90.2 ± 3.8 %). C6-HSL and DSF also significantly promoted the anammox activity and the production of extracellular polymeric substances (EPS). Microbial community analysis indicated that the relative abundance of Candidatus Kuenenia fluctuated and finally maintained at 27.0 % and 39.3 %, which was still significantly higher than that of initial phase. Meanwhile, the abundances of functional genes related to anammox process (hzsA, hdh and nirS) increased significantly. Metagenomic analysis revealed that the abundances of main functional genes involved in nitrogen metabolism, amino acid metabolism and QS were significantly upregulated. The interspecies interactions were also enhanced through QS-mediated intercellular communication, which was beneficial to microecological homeostasis in anammox systems. In contrast, DSF exhibited the more significant and longer-lasting promotion impact, while the effect of C6-HSL was rapid. These findings reveal the potential regulatory mechanism of exogenous signaling molecules on anammox consortia and drive the potential application of signaling molecules in the anammox process to treat real wastewater.}, }
@article {pmid40250228, year = {2025}, author = {Wang, H and Yang, Q and Wang, S}, title = {Metagenomic insights into the impact of tillage practices on soil nutrient cycling and wheat yield.}, journal = {The Science of the total environment}, volume = {978}, number = {}, pages = {179427}, doi = {10.1016/j.scitotenv.2025.179427}, pmid = {40250228}, issn = {1879-1026}, mesh = {*Triticum/growth &amp; development ; *Soil Microbiology ; Soil/chemistry ; *Agriculture/methods ; Phosphorus/analysis ; Nitrogen/analysis ; Metagenomics ; Microbiota ; Carbon/analysis ; Nitrogen Cycle ; }, abstract = {Decreasing tillage intensity (DT) are beneficial for soil health and crop yield; however, the relationship between microbial nutrient cycling function and crop yield remains poorly understood.The objective of this study was to investigate the impact of tillage practices of conventional tillage with rotary tillage (RT) and decreasing tillage intensity (DT) on the soil microbial community and the functions of carbon, nitrogen, and phosphorus cycles of wheat and examine the relationship between soil microbes and yield based on a four year field experiment. An increased maize yield of 9.3 % and 8.5 % in DT compared with that in RT in 2023 and 2024, respectively. Further analysis reveals that DT influences the availability of soil carbon, nitrogen, and phosphorus by altering microbial communities and their functions. Microbial function analysis indicates that DT leads to higher abundances of genes associated with glgP (starch degradation) and xynB (hemicellulose degradation), which play a crucial role in elevating POC levels (11.6 %-23.4 %). Additionally, DT shows increased abundances of genes related to organic nitrogen metabolism (glnA), nitrification (amoB), and nitrogen fixation (nifK), contributing to the rise in NO3[-]- N content (19.1 %-31.1 %). Furthermore, DT exhibits a high abundance of the organic phosphorus mineralization gene phnM, resulting in enhanced AP content (4.7 %-25.4 %). Moreover, among the microbial genera significantly influenced by DT, ten genera-Lysobacter, Luteimonas, Bradyrhizobium, Aromatoleum, Acidibacter, Variovorax, Polaromonas, Pseudorhodoplanes, Piscinibacter, and Ramlibacter-show increased abundance, positively impacting wheat yield. Our study offers a novel framework for comprehending the enhancement of wheat yield through the lens of microbial nutrient cycling functionality and mining of beneficial bacteria for wheat yield.}, }
@article {pmid40250042, year = {2025}, author = {Menichini, D and De Seta, F and Mastrolia, SA and Cetin, I and Carafa, A and Santagni, S and Foschi, C and Cerboneschi, M and Smeazzetto, S and Neri, I and Facchinetti, F}, title = {Probiotics in pregnancy and group B streptococcus colonization: A multicentric, randomized, placebo-controlled, double-blind study with a focus on vaginal microbioma.}, journal = {European journal of obstetrics, gynecology, and reproductive biology}, volume = {310}, number = {}, pages = {113976}, doi = {10.1016/j.ejogrb.2025.113976}, pmid = {40250042}, issn = {1872-7654}, mesh = {Female ; Humans ; Pregnancy ; *Probiotics/therapeutic use/administration &amp; dosage ; Double-Blind Method ; *Vagina/microbiology ; Adult ; *Streptococcus agalactiae ; *Streptococcal Infections/prevention &amp; control/microbiology ; *Microbiota/drug effects ; *Pregnancy Complications, Infectious/microbiology ; Young Adult ; Pregnancy Trimester, Third ; }, abstract = {OBJECTIVE: To evaluate the feasibility and effects of the use of probiotics in pregnancy, starting in the third trimester, on rectovaginal colonization of group B streptococcus (GBS) in women at low obstetric risk.<br><br>METHODS: A multicentre, randomized, placebo-controlled, double-blind, parallel-group study was conducted in three tertiary hospitals in northern Italy and included low-risk pregnant women. The intervention consisted of oral administration of two capsules of probiotics or placebo from 30&#xa0;weeks of pregnancy until 37&#xa0;weeks of pregnancy. The primary outcome was GBS colonization, evaluated with rectovaginal swabs. In a subgroup, selected at random, changes in the vaginal microbiome after treatment administration were evaluated using 16S Metagenomic Sequencing Library Preparation sequencing and analysis.<br><br>RESULTS: In total, 267 pregnant women were randomized to receive probiotics (n&#xa0;=&#xa0;133) or placebo (n&#xa0;=&#xa0;134). The two groups were similar at baseline. After treatment, no differences were found in the rates of positive rectovaginal swabs (p&#xa0;=&#xa0;0.24) and antibiotic administration (p&#xa0;=&#xa0;0.27). Only one case of postpartum fever (>38&#xa0;&#xb0;C) was found in the placebo group. Labour and delivery outcomes and neonatal outcomes were similar in both groups. Analysis of the vaginal microbiota showed that the relative abundance of Lactobacillus spp. was not modified significantly by the probiotics, but the relative abundance of Gardnerella spp. decreased significantly (3.6&#xa0;&#xb1;&#xa0;7.9 vs 5.5&#xa0;&#xb1;&#xa0;10.2; p&#xa0;=&#xa0;0.03). Interestingly, the relative abundance of Lactobacillus spp. reduced significantly in women who subsequently presented with partial rupture of membranes (46.9&#xa0;&#xb1;&#xa0;43.6 vs 77.7&#xa0;&#xb1;&#xa0;24.9; p&#xa0;=&#xa0;0.02).<br><br>CONCLUSION: Although the clinical outcomes were unaffected, administration of probiotics led to favourable changes in vaginal microbiota. It remains to be established how this effect could be translated into clinical advantage.}, }
@article {pmid40249033, year = {2025}, author = {Wei, Q and Chen, L and Yin, Y and Pai, M and Duan, H and Zeng, W and Hu, X and Xu, M and Li, S}, title = {Analysis of Blood Microbiome From People Living With HIV and Donors by 16S rRNA Metagenomic Sequencing.}, journal = {Journal of medical virology}, volume = {97}, number = {4}, pages = {e70341}, doi = {10.1002/jmv.70341}, pmid = {40249033}, issn = {1096-9071}, support = {//This work was supported by the Chinese Society of Blood Transfusion Weigao Research Fund Project (CSBT-MWG-2020-02) and the Chinese Academy of Medical Sciences Medical and Health Science and Technology Innovation Project (CAMS-2021-I2M-1-060)./ ; }, mesh = {Humans ; *RNA, Ribosomal, 16S/genetics ; *HIV Infections/microbiology/blood/drug therapy ; *Microbiota ; Metagenomics ; *Blood Donors ; *Bacteria/genetics/classification/isolation &amp; purification ; Male ; Adult ; Female ; Middle Aged ; Sequence Analysis, DNA ; *Blood/microbiology ; DNA, Bacterial/genetics/chemistry ; DNA, Ribosomal/genetics/chemistry ; }, abstract = {Utilize 16S rRNA sequencing technology to characterize bacterial species susceptible to people living with HIV (PLWH) across different stages. This mapping aims to establish a foundational framework for preventing secondary HIV infections, prolonging patient survival, enhancing quality of life, and advancing the diagnosis, treatment, and research of bacterial co-infections. In this study, we classified the participants into three groups: The blood of donors living with HIV (DI group), AIDS patients who have received ART treatment (PI group), and healthy blood donors as the control group (DH group). Each group was divided into three parallel subgroups, with 30 samples pooled from each parallel group for plasma extraction. As initial processing steps, the nine parallel subgroups were subjected to nucleic acid extraction and PCR amplification targeting the 16SV34 region. The resulting amplified products were subsequently forwarded to a sequencing company. It can be seen from the Venn diagram that the DI groups showed significantly higher bacterial diversity than the PI group and the DH group. The PI group had lower bacterial relative abundance and diversity compared to the DI group, with a community structure more similar to the control group. The DI group is particularly susceptible to several significant pathogens, including Ralstonia, Pseudomonas, Acinetobacter, Methyloversatilis, and Vibrio. The study revealed a greater quantity and diversity of bacteria in the DI blood compared to the PI and DH groups. This observation may be attributed to PI group patients in this study being hospitalized and receiving treatment.}, }
@article {pmid40248366, year = {2025}, author = {Lu, X and Lu, Q and Zhu, R and Sun, M and Chen, H and Ge, Z and Jiang, Y and Wang, Z and Zhang, L and Zhang, W and Dai, Z}, title = {Metagenomic analysis reveals the diversity of the vaginal virome and its association with vaginitis.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1582553}, pmid = {40248366}, issn = {2235-2988}, mesh = {Female ; Humans ; *Virome/genetics ; *Vagina/virology/microbiology ; *Metagenomics ; Phylogeny ; *Vaginitis/virology/microbiology ; Adult ; Microbiota ; Bacteriophages/genetics/classification ; *Viruses/classification/genetics/isolation &amp; purification ; Middle Aged ; Biodiversity ; Young Adult ; Bacteria/classification/genetics ; }, abstract = {INTRODUCTION: The human vaginal virome is an essential yet understudied component of the vaginal microbiome. Its diversity and potential contributions to health and disease, particularly vaginitis, remain poorly understood.<br><br>METHODS: We conducted metagenomic sequencing on 24 pooled vaginal swab libraries collected from 267 women, including both healthy individuals and those diagnosed with vaginitis. Viral community composition, diversity indices (Shannon, Richness, and Pielou), and phylogenetic characteristics were analyzed. Virus-host associations were also investigated.<br><br>RESULTS: DNA viruses dominated the vaginal virome. Anelloviridae and Papillomaviridae were the most prevalent eukaryotic viruses, while Siphoviridae and Microviridae were the leading bacteriophages. Compared to healthy controls, the vaginitis group exhibited significantly reduced alpha diversity and greater beta diversity dispersion, indicating altered viral community structure. Anelloviruses, detected in both groups, showed extensive lineage diversity, frequent recombination, and pronounced phylogenetic divergence. HPV diversity and richness were significantly elevated in the vaginitis group, alongside an unbalanced distribution of viral lineages. Novel phage-bacterial associations were also identified, suggesting a potential role for bacteriophages in shaping the vaginal microbiome.<br><br>DISCUSSION: These findings provide new insights into the composition and structure of the vaginal virome and its potential association with vaginal dysbiosis. The distinct virome characteristics observed in women with vaginitis highlight the relevance of viral communities in reproductive health. Future studies incorporating individual-level sequencing and metatranscriptomics are warranted to explore intra-host viral dynamics, assess viral activity, and clarify the functional roles of vaginal viruses in host-microbiome interactions.}, }
@article {pmid40247828, year = {2025}, author = {Doorenspleet, K and Mailli, AA and van der Hoorn, BB and Beentjes, KK and De Backer, A and Derycke, S and Murk, AJ and Reiss, H and Nijland, R}, title = {Advancing molecular macrobenthos biodiversity monitoring: a comparison between Oxford Nanopore and Illumina based metabarcoding and metagenomics.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19158}, pmid = {40247828}, issn = {2167-8359}, mesh = {*Biodiversity ; *Metagenomics/methods ; *DNA Barcoding, Taxonomic/methods ; North Sea ; Nanopores ; Belgium ; High-Throughput Nucleotide Sequencing/methods ; }, abstract = {DNA-based methods and developments of sequencing technologies are integral to macrobenthos biodiversity studies, and their implementation as standardized monitoring methods is approaching. Evaluating the efficacy and reliability of these technological developments is crucial for macrobenthos biodiversity assessments. In this study, we compared three DNA-based techniques for assessing the diversity of bulk macrobenthos samples from the Belgian North Sea. Specifically, we compared amplicon sequencing using Illumina MiSeq and portable real-time sequencing of Oxford Nanopore versus shotgun sequencing using Illumina NovaSeq sequencing. The 313 bp mitochondrial cytochrome c oxidase subunit I (COI) metabarcoding fragment served as the target region for the metabarcoding analysis. Our results indicate that Oxford Nanopore and MiSeq metabarcoding had similar performances in terms of alpha and beta diversity, revealing highly similar location-specific community compositions. The NovaSeq metagenomics method also resulted in similar alpha diversity, but slightly different community compositions compared to the metabarcoding approach. Despite these differences, location-specific community compositions were maintained across all platforms. Notably, read counts from the NovaSeq metagenomic analysis showed the weakest correlation to size corrected morphological abundance and there were mismatches between morphological identification and all DNA based findings which are likely caused by a combination of factors such as primer efficiency and an incomplete reference database. Our findings underscore the critical importance of database completeness prior to implementing DNA-based techniques as standardized monitoring method, especially for metagenomics. Nevertheless, our findings emphasize that Oxford Nanopore metabarcoding proves to be a viable alternative to the conventional Illumina MiSeq metabarcoding platform for macrobenthos biodiversity monitoring.}, }
@article {pmid40247632, year = {2025}, author = {Lee, JS and Kao, DJ and Worledge, CS and Villamaria, ZF and Wang, RX and Welch, NM and Kostelecky, RE and Colgan, SP}, title = {E. coli genetically modified for purine nucleobase release promotes butyrate generation and colonic wound healing during DSS insult.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2490211}, pmid = {40247632}, issn = {1949-0984}, support = {I01 BX002182/BX/BLRD VA/United States ; K01 DK129410/DK/NIDDK NIH HHS/United States ; K08 DK120809/DK/NIDDK NIH HHS/United States ; R01 DK104713/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; *Escherichia coli/genetics/metabolism ; *Wound Healing ; Gastrointestinal Microbiome ; Mice ; *Purines/metabolism ; *Colon/microbiology/metabolism/pathology ; *Butyrates/metabolism ; Mice, Inbred C57BL ; Disease Models, Animal ; *Colitis/chemically induced/microbiology ; Intestinal Mucosa/metabolism/microbiology ; Male ; }, abstract = {The gut microbiota transforms energy stored as undigestible carbohydrates into a remarkable number of metabolites that fuel intestinal bacterial communities and the host tissue. Colonic epithelial cells at the microbiota-host interface depend upon such microbiota-derived metabolites (MDMs) to satisfy their energy requisite. Microbial dysbiosis eliciting MDM loss contributes to barrier dysfunction and mucosal disease. Recent work has identified a role for microbiota-sourced purines (MSPs), notably hypoxanthine, as an MDM salvaged by the colonic epithelium for nucleotide biogenesis and energy balance. Here, we investigated the role of MSPs in mice during disease-modeled colonic energetic stress using a strain of E. coli genetically modified for enhanced purine nucleobase release (E. coli Mutant). E. coli Mutant colonization protected against DSS-induced tissue damage and permeability while promoting proliferation for wound healing. Metabolite and metagenomic analyses suggested a colonic butyrate-purine nucleobase metabolic axis, wherein the E. coli Mutant provided purine substrate for Clostridia butyrate production and host purine salvage, altogether supplying the host substrate for efficient nucleotide biogenesis and energy balance.}, }
@article {pmid40246210, year = {2025}, author = {Wani, AK and Qadir, F and Elboughdiri, N and Rahayu, F and Saefudin,  and Pranowo, D and Martasari, C and Kosmiatin, M and Suhara, C and Sudaryono, T and Prayogo, Y and Yadav, KK and Muzammil, K and Eltayeb, LB and Alreshidi, MA and Singh, R}, title = {Metagenomics and plant-microbe symbioses: Microbial community dynamics, functional roles in carbon sequestration, nitrogen transformation, sulfur and phosphorus mobilization for sustainable soil health.}, journal = {Biotechnology advances}, volume = {82}, number = {}, pages = {108580}, doi = {10.1016/j.biotechadv.2025.108580}, pmid = {40246210}, issn = {1873-1899}, mesh = {*Symbiosis ; *Soil Microbiology ; *Metagenomics/methods ; Nitrogen/metabolism ; Phosphorus/metabolism ; *Plants/microbiology/metabolism ; Sulfur/metabolism ; *Microbiota ; *Carbon Sequestration ; Soil/chemistry ; Carbon/metabolism ; }, abstract = {Biogeochemical cycles are fundamental processes that regulate the flow of essential elements such as carbon, nitrogen, and phosphorus, sustaining ecosystem productivity and global biogeochemical equilibrium. These cycles are intricately influenced by plant-microbe symbioses, which facilitate nutrient acquisition, organic matter decomposition, and the transformation of soil nutrients. Through mutualistic interactions, plants and microbes co-regulate nutrient availability and promote ecosystem resilience, especially under environmental stress. Metagenomics has emerged as a transformative tool for deciphering the complex microbial communities and functional genes driving these cycles. By enabling the high-throughput sequencing and annotation of microbial genomes, metagenomics provides unparalleled insights into the taxonomic diversity, metabolic potential, and functional pathways underlying microbial contributions to biogeochemical processes. Unlike previous reviews, this work integrates recent advancements in metagenomics with complementary omics approaches to provide a comprehensive perspective on how plant-microbe interactions modulate biogeochemical cycles at molecular, genetic, and ecosystem levels. By highlighting novel microbial processes and potential biotechnological applications, this review aims to guide future research in leveraging plant-microbe symbioses for sustainable agriculture, ecosystem restoration, and climate change mitigation.}, }
@article {pmid40245686, year = {2025}, author = {Simó, C and Mamani-Huanca, M and Hernández-Hernández, O and Redondo-Río, &#xc1; and Muñoz, S and García-Cañas, V}, title = {Application of nanopore long-read sequencing and metabolomics in an in vitro dynamic intestinal digestion model: A genome-centric metatranscriptomic approach to investigating microbial TMA and SCFA metabolism.}, journal = {Journal of pharmaceutical and biomedical analysis}, volume = {262}, number = {}, pages = {116896}, doi = {10.1016/j.jpba.2025.116896}, pmid = {40245686}, issn = {1873-264X}, mesh = {*Gastrointestinal Microbiome/physiology/drug effects ; *Methylamines/metabolism ; Metabolomics/methods ; *Fatty Acids, Volatile/metabolism ; Humans ; *Digestion/physiology ; *Nanopore Sequencing/methods ; Plant Extracts/pharmacology ; Models, Biological ; Fermentation ; Transcriptome ; }, abstract = {The gut microbiota plays a relevant role in human health by metabolizing dietary components into bioactive molecules, including short-chain fatty acids and trimethylamine. Understanding how dietary interventions modulate microbial metabolism is key to developing strategies for reducing harmful metabolites such as TMA, a precursor of the pro-atherogenic trimethylamine-N-oxide. In this study, we integrated a dynamic in vitro gastrointestinal model (simgi®) with nanopore sequencing technology and metabolomics to investigate the impact of red thyme extract on microbial trimethylamine metabolism from L-carnitine. Metabarcoding, metagenomic, and metatranscriptomic analyses were performed alongside targeted metabolite quantification. Our results showed that microbial trimethylamine production primarily occurred in the transverse and descending colon compartments, coinciding with increased transcriptional activity of taxa harboring gbu cluster, associated with trimethylamine production. The administration of red thyme extract transiently reduced L-carnitine utilization but had a limited effect on overall trimethylamine levels. In parallel, short-chain fatty acids analysis revealed a shift in microbial fermentation patterns, with Acidaminococcus emerging as a dominant butyrate producer. Carbohydrate-active enzyme profiling identified Bacteroides and Parabacteroides genera as key mucin utilizers under the simulation conditions. These findings highlight the metabolic plasticity of the gut microbiota in response to the presence of L-carnitine and reduced complex carbohydrates availability, and provide new insights into microbial functional responses to dietary interventions targeting trimethylamine metabolism. Additionally, this study represents the first integration of nanopore-based metagenomics and genome-centric metatranscriptomics with targeted metabolomics in a dynamic in vitro gastrointestinal model. This multi-omics approach enabled a detailed reconstruction of the microbial metabolic network involved in L-carnitine utilization and trimethylamine formation, offering a powerful tool for mechanistic studies of gut microbiota-diet interactions.}, }
@article {pmid40244481, year = {2025}, author = {Klangnurak, W and Hinthong, W and Aue-Umneoy, D and Yomla, R}, title = {Assessment of Bacterial Community and Other Microorganism Along the Lam Takhong Watercourse, Nakhon Ratchasima, Thailand.}, journal = {Current microbiology}, volume = {82}, number = {6}, pages = {248}, pmid = {40244481}, issn = {1432-0991}, support = {grant number FRB650039/0240 project number 165430//Chulabhorn Royal Academy (Fundamental Fund: fiscal year 2022 by National Science Research and Innovation Fund (NSRF))/ ; contract number FF-65/008//Chulabhorn Royal Academy (Fundamental Fund: fiscal year 2022 by National Science Research and Innovation Fund (NSRF))/ ; }, mesh = {Thailand ; *Bacteria/classification/genetics/isolation &amp; purification ; *Water Microbiology ; *Rivers/microbiology ; Metagenomics ; *Microbiota ; Water Quality ; Environmental Monitoring ; }, abstract = {Lam Takhong, a vital watercourse in Nakhon Ratchasima province, Thailand, supports agricultural, recreational, and urban activities. Originating in a national park, it flows through urban areas before discharging into a dam and running off via the sluice gate. While water quality monitoring is routine, microbial community data have never been reported. This study assesses the microorganism diversity and functional genes in Lam Takhong watercourse using a shotgun sequencing metagenomics approach. Water samples were collected from the upstream, midstream, and downstream sections. The midstream area exhibited the highest abundance of fecal coliform bacteria, plankton, and benthos, suggesting elevated pollution levels. Genes related to metabolism, particularly carbohydrate and amino acid pathways, were predominant. Proteobacteria was the most abundant phylum found in the water, with Limnohabitans as the dominant planktonic bacteria. Bacteria such as Staphylococcus, Mycobacterium, Escherichia, Pseudomonas, Enterococcus, Neisseria, Streptomyces, and Salmonella were detected, along with antibiotic resistance genes, raising public health concerns. These findings emphasize the need for microbial monitoring in the Lam Takhong to determine the potential water quality bioindicator and prevent potential disease spread through the water system.}, }
@article {pmid40244477, year = {2025}, author = {Li, J and Zhang, Y and He, L}, title = {The role of urine microbiota in culture-negative patients with pyuria.}, journal = {World journal of urology}, volume = {43}, number = {1}, pages = {227}, pmid = {40244477}, issn = {1433-8726}, mesh = {Humans ; *Pyuria/microbiology/virology/urine ; Retrospective Studies ; Male ; Female ; *Microbiota ; Middle Aged ; *Urine/microbiology/virology ; Aged ; Adult ; }, abstract = {BACKGROUND: Pyuria is usually caused by bacteria and usually results in antibiotic prescriptions. However, traditional urine culture is time-consuming and has a high false negative possibility. Additionally, the role of urine viruses in pyuria is unclear. Metagenomics can enhance the precision and efficiency of diagnosis by directly sequencing the microbiota in urine. We aimed to determine the association of urine microbiota in patients with or without pyuria and culture negative.<br><br>METHODS: In this retrospective study, we screened urine samples from patients who received whole genome sequencing (WGS) and had a negative urine culture from October 2021 to May 2024. We compared differences in the top 10 detected genera of urine microbiota between the pyuria group and the non-pyuria group. Multivariable analysis was used for correlation analysis and performed to odds ratio (OR) and OR with 95% confidence interval (CI). The receiver operating characteristic (ROC) curve analyses tested the predictive ability of associated microbiota to pyuria.<br><br>RESULTS: We found 29 microbial genera including 2 viral genera. Escherichia [OR 11.688 (95%CI 2.190-62.362), p&#x2009;=&#x2009;0.004], Gardnerella [OR 9.904 (95%CI 2.180-45.005), p&#x2009;=&#x2009;0.003] or Polyomavirus [OR 5.205 (95%CI 1.295-20.919), p&#x2009;=&#x2009;0.020] was associated with the independent risk factors of pyuria, while Lactobacillus was associated with a decreased risk of pyuria [OR 17.273 (95%CI 1.297-230.061), p&#x2009;=&#x2009;0.031]. An integrated logistic regression model of Escherichia, Gardnerella, Polyomavirus, and Lactobacillus exhibited a predictive power for pyuria with the area under curve (AUC) of 0.8132 [95%CI (0.7098-0.9167), p&#x2009;<&#x2009;0.001].<br><br>CONCLUSION: Urine microbiota is diverse. Escherichia, Gardnerella, or Polyomavirus are independently associated with pyuria, while Lactobacillus is a positive factor against pyuria.}, }
@article {pmid40244062, year = {2025}, author = {Stevens, EJ and Li, JD and Hector, TE and Drew, GC and Hoang, K and Greenrod, STE and Paterson, S and King, KC}, title = {Within-host competition causes pathogen molecular evolution and perpetual microbiota dysbiosis.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40244062}, issn = {1751-7370}, support = {COEVOPRO 802242//European Research Council Starting/ ; 802242//European Research Council Starting Grant/ ; //EPA Cephalosporin Junior Research Fellowship at Linacre College/ ; }, mesh = {Animals ; *Evolution, Molecular ; *Dysbiosis/microbiology ; *Microbiota ; *Staphylococcus aureus/genetics/pathogenicity/physiology ; Virulence ; Whole Genome Sequencing ; *Host-Pathogen Interactions ; Biofilms/growth &amp; development ; Caenorhabditis elegans/microbiology ; }, abstract = {Pathogens newly invading a host must compete with resident microbiota. This within-host microbial warfare could lead to more severe disease outcomes or constrain the evolution of virulence. By passaging a widespread pathogen (Staphylococcus aureus) and a natural microbiota community across populations of nematode hosts, we show that the pathogen displaced microbiota and reduced species richness, but maintained its virulence across generations. Conversely, pathogen populations and microbiota passaged in isolation caused more host harm relative to their respective no-host controls. For the evolved pathogens, this increase in virulence was partly mediated by enhanced biofilm formation and expression of the global virulence regulator agr. Whole genome sequencing revealed shifts in the mode of selection from directional (on pathogens evolving in isolation) to fluctuating (on pathogens evolving in host microbiota). This approach also revealed that competitive interactions with the microbiota drove early pathogen genomic diversification. Metagenome sequencing of the passaged microbiota shows that evolution in pathogen-infected hosts caused a significant reduction in community stability (dysbiosis), along with restrictions on the co-existence of some species based on nutrient competition. Our study reveals how microbial competition during novel infection could determine the patterns and processes of evolution with major consequences for host health.}, }
@article {pmid40243577, year = {2025}, author = {Paradzik Simunovic, M and Degoricija, M and Korac-Prlic, J and Lesin, M and Stanic, R and Puljak, L and Olujic, I and Marin Lovric, J and Vucinovic, A and Ljubic, Z and Thissen, J and Reen Kok, C and Jaing, C and Bucan, K and Terzic, J}, title = {Potential Role of Malassezia restricta in Pterygium Development.}, journal = {International journal of molecular sciences}, volume = {26}, number = {7}, pages = {}, pmid = {40243577}, issn = {1422-0067}, support = {IP-2020-02-8921//Croatian Science Foundation/ ; }, mesh = {Humans ; *Pterygium/microbiology/pathology/genetics ; *Malassezia/genetics/isolation &amp; purification ; Male ; Female ; Middle Aged ; Conjunctiva/microbiology/pathology ; Microbiota ; Aged ; Gene Expression Profiling ; }, abstract = {Pterygium is a condition affecting the ocular surface, marked by a triangular-shaped growth of fibrotic tissue extending from the nasal conjunctiva toward the corneal center, potentially causing visual impairment. While ultraviolet (UV)light exposure is the primary risk factor for pterygium, its underlying cause remains unclear. In order to better understand the true genesis of pterygium development, we investigated pterygium tissue and compared it with healthy conjunctiva controls. Given the eye's direct environmental exposure, we analyzed the microbiota composition using metagenomic sequencing of pterygium tissue to identify microbes potentially associated with this condition. Metagenomic sequencing revealed a higher prevalence of the fungus Malassezia restricta in five pterygium samples, confirmed by in situ hybridization. The CHIT1 gene, which plays a role in antifungal defenses, displayed the highest expression in five pterygium tissue samples compared to healthy conjunctiva controls, suggesting the potential involvement of Malassezia restricta in pterygium development. Gene expression profiling of pterygium highlighted an IL-33 and IL-4 gene expression signature, along with an increased presence of M2 macrophages, emphasizing their role in promoting fibrosis-a hallmark feature of pterygium. The detection of Malassezia restricta in the pterygium samples and associated molecular changes provides novel insights into the ocular microbiome and raises the possibility of Malassezia's involvement in pterygium pathology.}, }
@article {pmid40240641, year = {2025}, author = {Muñoz-Rivera, MP and Martínez-Morales, F and Guzmán-Morales, D and Rivera-Ramírez, A and Sánchez-Reyes, A and Trejo-Hernández, MR}, title = {Population dynamics of a bacterial consortium from a marine sediment of the Gulf of Mexico during biodegradation of the aromatic fraction of heavy crude oil.}, journal = {International microbiology : the official journal of the Spanish Society for Microbiology}, volume = {}, number = {}, pages = {}, pmid = {40240641}, issn = {1618-1905}, abstract = {In the marine environment, uncontained crude oil is dispersed and degraded by abiotic or biotic processes; native bacterial populations gradually adapt to integrate interspecific and intraspecific metabolic networks for efficient and dynamic utilization of xenobiotic substrates as carbon source. Aromatic compounds accumulate in marine sediments and bacterial populations at these sites play a crucial role in the mobilization of those complex molecules into the global geochemical cycles. The aim of this work was to use native bacteria from a marine sediment sample in the Gulf of Mexico to enhance the biodegradation of the aromatic fraction from a heavy crude oil, as the sole carbon source, during a 200-day microcosm experiment. This process involved the gradual increase of the aromatic fraction into the culture to promote bacterial enrichment; the increase in viable cells correlated well with a biodegradation pattern of the aromatic fraction at some points. Bacterial biodiversity, as revealed by metagenomic and microbiological approaches, indicates that bacterial groups are present at all fraction concentrations, but with changes in abundance, richness and dominance. Population dynamics revealed the presence of bacteria that modify emulsification and surface tension reduction values, which could promote the incorporation of the highly hydrophobic polyaromatic compounds into the culture aqueous phase for their biodegradation by hydrocarbonoclastic bacteria present. On the other hand, the presence of non-hydrocarbonoclastic bacteria probably is sustained by cross-feeding events involving sugars, amino acids, short carbon compounds, lipids produced by the former bacteria by co-metabolism of complex aromatic substrates, which are transformed into diverse biomolecules for biofilm development to promote a bacterial population dynamics adapted to this environment.}, }
@article {pmid40240456, year = {2025}, author = {Bahetjan, K and Yu-Xia,  and Lin, S and Aili, N and Yang, H and Du, S}, title = {Analysis of the bronchoalveolar lavage fluid microbial flora in COPD patients at different lung function during acute exacerbation.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {13179}, pmid = {40240456}, issn = {2045-2322}, mesh = {Humans ; *Pulmonary Disease, Chronic Obstructive/microbiology/physiopathology ; *Bronchoalveolar Lavage Fluid/microbiology ; Male ; Female ; Aged ; Middle Aged ; *Microbiota ; Bacteria/classification/genetics/isolation &amp; purification ; *Lung/microbiology/physiopathology ; Dysbiosis/microbiology ; }, abstract = {There is a correlation between the dysbiosis of the respiratory microbiota and the occurrence, severity, frequency, and mortality of Chronic Obstructive Pulmonary Disease (COPD). However, it is not unclear if there are differences in the bronchoalveolar lavage fluid (BALF) microbiota among patients at differente lung function. In this study, BALF samples were collected from 70 COPD patients experiencing acute exacerbations (AECOPD). The patients were divided into a mild group (FEV1/pre ≥ 50; PFT I, n = 50) and a severe group (FEV1/pre < 50; PFT II, n = 20) according to the lung function: or a frequent exacerbation (FE, n = 41) group and a non-frequent exacerbation (NFE, n = 29) group according to their exacerbation history. Microbiota analysis of BALF samples was conducted using mNGS and bioinfromatic analysis. Compared to PFT I group, PFT II group exhibited a significant decrease in species diversity (Shannon index), as well as a significant reduction in total species count and richness (Chao1, ACE indices). NFE group demonstrated diversity similar to that of FE group. Conversely, the microbial diversity of NFE group was comparable to that of FE group. The most abundant bacterial genera were Streptococcus, Prevotella, Veillonella, Rod-shaped Bacillus, and Rothia. Aspergillus was the most dominant fungal genus in AECOPD. Lymphocryptovirus was the most prevalent virus in AECOPD.Compared to the PFT I group, Corynebacterium's abundance significantly increased in PFT II group. Furthermore, FE group showed a notable increase in Streptococcus mitis abundance relative to NFE group. Bubble plot analysis revealed a significant increase in Moraxella, Fusobacterium, Haemophilus, Pseudomonas, Streptomyces, and Klebsiella in PFT II group, including a notable increase in typical Veillonella, Actinomyces, and Gordonia. The NFE group exhibited a significant increase in Bacteroides and Prevotella's relative abundance. Spearman correlation analysis revealed strong positive correlations among certain microbial communities. There exists a significant variation in microbial composition across groups of AECOPD patients at different lung function. Specifically, patients with severe airflow limitations exhibit a significant reduction in microbial diversity. Additionally, distinct bacterial taxa are enriched in patients characterized by varying levels of airflow limitation and exacerbation frequency. These observations offer vital insights into the pathogenesis of AECOPD, suggesting a potentially crucial role for the microbiota in its development. Such findings pave the way for identifying potential therapeutic targets and intervention strategies, ultimately aiming to improve treatment outcomes for AECOPD patients.}, }
@article {pmid40240384, year = {2025}, author = {Pinto, OHB and Biazotti, BB and de Souza, RSC and Yassitepe, J&#xc9;CT and Arruda, P and Dante, RA and Gerhardt, IR}, title = {Seasonal bacterial profiles of Vellozia with distinct drought adaptations in the megadiverse campos rupestres.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {636}, pmid = {40240384}, issn = {2052-4463}, support = {2022/08797-4//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de S&#xe3;o Paulo (S&#xe3;o Paulo Research Foundation)/ ; 2022/08797-4//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de S&#xe3;o Paulo (S&#xe3;o Paulo Research Foundation)/ ; }, mesh = {*Droughts ; Seasons ; *Soil Microbiology ; Brazil ; RNA, Ribosomal, 16S/genetics ; Adaptation, Physiological ; *Microbiota ; Bacteria/genetics/classification ; }, abstract = {Microbial communities can vary as a function of seasonal precipitation and the phenotypic characteristics of the prevailing plant species in an ecosystem. The Brazilian campos rupestres (CRs) host a unique flora adapted to harsh conditions, including severe droughts and nutrient-poor soils. Velloziaceae, a dominant angiosperm family in CRs, exhibit contrasting drought adaptive strategies, prominently desiccation tolerance and dehydration avoidance. Here, we created a comprehensive dataset of microbial composition and dynamics of bulk soil and distinct plant compartments (leaf blade, dry sheath, aerial root, and underground root) from two desiccation-tolerant and two dehydration-avoiding, non-desiccation-tolerant Vellozia species, across four seasons (beginning and end of rainy and dry seasons) through 16S rRNA gene sequencing of 374 samples. This dataset also includes 38 soil metagenomes encompassing dry and rainy seasons from both drought adaptive strategies. Exploring an overlooked aspect of CRs biology offers significant potential for understanding plant-microbial associations and adaptations to water availability in tropical regions. The genetic data and metadata support further research for hypothesis testing and cross-study comparisons.}, }
@article {pmid40239498, year = {2025}, author = {Chen, M and Grégoire, DS and St-Germain, P and Berdugo-Clavijo, C and Hug, LA}, title = {Microbial diversity and capacity for arsenic biogeochemical cycling in aquifers associated with thermal mobilization.}, journal = {The Science of the total environment}, volume = {977}, number = {}, pages = {179357}, doi = {10.1016/j.scitotenv.2025.179357}, pmid = {40239498}, issn = {1879-1026}, mesh = {*Arsenic/analysis/metabolism ; *Groundwater/microbiology/chemistry ; *Water Pollutants, Chemical/analysis/metabolism ; *Microbiota ; RNA, Ribosomal, 16S/analysis ; Alberta ; Bacteria/metabolism ; Biodegradation, Environmental ; }, abstract = {Thermal recovery technologies for in-situ bitumen extraction can result in the heating of surrounding aquifers, potentially mobilizing arsenic naturally present in the sediments to the groundwater. The relative toxicity of dissolved arsenic is related to its speciation, with As(V) being less toxic than As(III). Microorganisms have various mechanisms of arsenic detoxification and metabolism, which include genes for efflux, methylation, and reduction/oxidation of As(V)/As(III). We characterized the microbial communities along two aquifer transects associated with thermally mobilized arsenic near Northeastern Alberta oil sands deposits. 16S rRNA amplicons and metagenomic sequencing data of biomass from filtered groundwater indicated major changes in the dominant taxa between wells, especially those currently experiencing elevated arsenic concentrations. Annotation of arsenic-related genes indicated that efflux pumps (arsB, acr3), intracellular reduction (arsC) and methylation (arsM) genes were widespread among community members but comparatively few organisms encoded genes for arsenic respiratory reductases (arrA) and oxidases (arxA, aioA). While this indicates that microbes have the capacity to exacerbate arsenic toxicity by increasing the relative concentration of As(III), some populations of iron oxidizing and sulfate reducing bacteria (including novel Gallionella and Thermodesulfovibrionia populations) show potential for indirect bioremediation through formation of insoluble iron/sulfide minerals which adsorb or coprecipitate arsenic. An unusually high proportional abundance of a single Paceibacteria population that lacked arsenic resistance genes was identified in one high‑arsenic well, and we discuss hypotheses for its ability to persist. Overall, this study describes how aquifer microbial communities respond to thermal and arsenic plumes, and predicts potential contributions of microbes to arsenic biogeochemical cycling under this disturbance.}, }
@article {pmid40238917, year = {2025}, author = {Trepka, KR and Kidder, WA and Kyaw, TS and Halsey, T and Olson, CA and Ortega, EF and Noecker, C and Upadhyay, V and Stanfield, D and Steiding, P and Guthrie, BGH and Spanogiannopoulos, P and Dumlao, D and Turnbaugh, JA and Stachler, MD and Van Blarigan, EL and Venook, AP and Atreya, CE and Turnbaugh, PJ}, title = {Expansion of a bacterial operon during cancer treatment ameliorates fluoropyrimidine toxicity.}, journal = {Science translational medicine}, volume = {17}, number = {794}, pages = {eadq8870}, pmid = {40238917}, issn = {1946-6242}, support = {F30 CA257378/CA/NCI NIH HHS/United States ; R01 CA255116/CA/NCI NIH HHS/United States ; R01 DK114034/DK/NIDDK NIH HHS/United States ; R01 HL122593/HL/NHLBI NIH HHS/United States ; }, mesh = {Animals ; Female ; Humans ; Male ; Mice ; *Bacteria/genetics/drug effects ; *Colorectal Neoplasms/drug therapy/microbiology ; *Fluorouracil/therapeutic use/toxicity/adverse effects ; Gastrointestinal Microbiome/drug effects/genetics ; *Operon/genetics ; *Pyrimidines/toxicity ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Dose-limiting toxicities remain a major barrier to drug development and therapy, revealing the limited predictive power of human genetics. Here, we demonstrate the utility of a more comprehensive approach to studying drug toxicity through longitudinal profiling of the human gut microbiome during colorectal cancer (CRC) treatment (NCT04054908) coupled to cell culture and mouse experiments. Substantial shifts in gut microbial community structure during oral fluoropyrimidine treatment across multiple patient cohorts, in mouse small and large intestinal contents, and in patient-derived ex vivo communities were revealed by 16S rRNA gene sequencing. Metagenomic sequencing revealed marked shifts in pyrimidine-related gene abundance during oral fluoropyrimidine treatment, including enrichment of the preTA operon, which was sufficient for the inactivation of active metabolite 5-fluorouracil (5-FU). preTA[+] bacteria depleted 5-FU in gut microbiota grown ex vivo and in the mouse distal gut. Germ-free and antibiotic-treated mice experienced increased fluoropyrimidine toxicity, which was rescued by colonization with the mouse gut microbiota, preTA[+] Escherichia coli, or preTA-high stool from patients with CRC. Last, preTA abundance was negatively associated with fluoropyrimidine toxicity in patients. Together, these data support a causal, clinically relevant interaction between a human gut bacterial operon and the dose-limiting side effects of cancer treatment. Our approach may be generalizable to other drugs, including cancer immunotherapies, and provides valuable insights into host-microbiome interactions in the context of disease.}, }
@article {pmid40238748, year = {2025}, author = {da Silva-Álvarez, E and Gómez-Arrones, V and Correa-Fiz, F and Martín-Cano, FE and Gaitskell-Phillips, G and Carrasco, JJ and Rey, J and Aparicio, IM and Peña, FJ and Alonso, JM and Ortega-Ferrusola, C}, title = {Metagenomic and proteomic analyses reveal similar reproductive microbial profiles and shared functional pathways in uterine immune regulation in mares and jennies.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0321389}, pmid = {40238748}, issn = {1932-6203}, mesh = {Animals ; Female ; Horses/microbiology/immunology ; *Uterus/microbiology/immunology/metabolism ; Proteomics/methods ; *Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; *Metagenomics ; Vagina/microbiology/immunology ; Bacteria/genetics/classification ; Proteome ; }, abstract = {This study aims to unveil potential differences in the vaginal and uterine microbiomes in mares and jennies, and to identify possible mechanisms involved in uterine immune homeostasis. The microbiota was characterized using 16S rRNA sequencing, and the uterine proteome was analyzed using UHPLC/MS/MS in 18 samples from healthy mares and 14 from jennies. While taxonomic analysis revealed high interspecies similarities, β-diversity analysis showed distinct clustering, with only two vaginal taxa and five uterine taxa differing between species. Despite compositional differences, PICRUSt analysis suggested minimal variations in predicted functional pathways across species. Comparing vaginal and uterine microbiota within the same species revealed overlapping bacterial taxa, but significant differences in α- and β-diversity and functional pathways. The uterine microbiota of both species was dominated by Proteobacteria, Firmicutes, Bacteroidetes, and Actinobacteria, with abundant taxa like Streptococcus, Pseudomonas, Bacillus, Corynebacterium, and Staphylococcus, many of which are frequently associated with endometritis. The presence of Lactobacillus in the equine reproductive tract was minimal or non-existent. KEGG functional pathway analysis predicted that uterine microbiota of both species utilize metabolic pathways with potential immunomodulatory effects. Proteomic enrichment analysis showed that numerous overexpressed uterine proteins in both species are linked to adaptive and innate immune regulation and defense mechanisms against symbionts. Gene enrichment analysis identified several enriched Gene Ontology terms, including response to bacterial stimuli, humoral immune regulation, and TGF-beta receptor signaling, underscoring microbial-host interactions. The uterine microbiota may play a vital role in maintaining immune balance. Further research is required to confirm its interaction with the uterine immune system and clarify the mechanisms involved.}, }
@article {pmid40238740, year = {2025}, author = {Wang, J and Yin, J and Liu, X and Liu, Y and Jin, X}, title = {Gut commensal bacterium Bacteroides vulgatus exacerbates helminth-induced cardiac fibrosis through succinate accumulation.}, journal = {PLoS pathogens}, volume = {21}, number = {4}, pages = {e1013069}, pmid = {40238740}, issn = {1553-7374}, mesh = {Animals ; *Succinic Acid/metabolism ; Mice ; Fibrosis ; *Gastrointestinal Microbiome/physiology ; *Trichinellosis/complications/metabolism/pathology ; *Trichinella spiralis ; *Bacteroides/metabolism ; Mice, Inbred C57BL ; Receptors, G-Protein-Coupled/metabolism ; Myocardium/pathology/metabolism ; Male ; }, abstract = {Trichinella spiralis (Ts) is known to cause cardiac fibrosis, which is a critical precursor to various heart diseases, and its progression is influenced by metabolic changes. However, the metabolic mechanisms remain unclear. Here, we observed that Ts-infected mice exhibited cardiac fibrosis along with elevated succinate levels in the heart using metabolomic analysis. Administration of succinate exacerbated fibrosis during Ts infection, while deficiency in succinate receptor 1 (Sucnr1) alleviated the condition, highlighting the role of the succinate-Sucnr1 axis in fibrosis development. Furthermore, metagenomics sequencing showed that Ts-infected mice had a higher abundance ratio of succinate-producing bacteria to succinate-consuming bacteria in the intestines. Notably, the succinate-producer Bacteroides vulgatus was enriched in Ts group. Oral supplementation with B. vulgatus aggravated Ts-induced cardiac fibrosis. In summary, our findings underscore the succinate-Sucnr1 axis as a critical pathway in helminth-induced cardiac fibrosis and highlight the potential of targeting this axis for therapeutic interventions. This study presents novel insights into the gut-heart axis, revealing innovative strategies for managing cardiovascular complications associated with helminth infections.}, }
@article {pmid40237492, year = {2025}, author = {Hu, T and Meng, Y and Zhao, C and Sheng, D and Yang, S and Dai, J and Wei, T and Zhang, Y and Zhao, G and Liu, Y and Wang, Q and Zhang, L}, title = {Genome-scale metabolic modeling reveals specific vaginal Lactobacillus strains and their metabolites as key inhibitors of Candida albicans.}, journal = {Microbiology spectrum}, volume = {13}, number = {6}, pages = {e0298424}, doi = {10.1128/spectrum.02984-24}, pmid = {40237492}, issn = {2165-0497}, mesh = {*Candida albicans/growth &amp; development/drug effects/metabolism ; Female ; Humans ; *Vagina/microbiology ; *Lactobacillus/metabolism/genetics/classification ; Candidiasis, Vulvovaginal/microbiology ; Microbiota ; Antibiosis ; Adult ; Microbial Interactions ; Metagenomics ; }, abstract = {As the predominant constituents of the vaginal microbiome in healthy women, Lactobacillus species are considered essential in maintaining a homeostatic vaginal microbiome. Specific Lactobacillus species can produce beneficial metabolites to support their persistence within the host environment and inhibit Candida albicans colonization. Due to the extensive diversity of Lactobacillus species and their metabolites, comprehensively investigating all possible interactions remains challenging. This study employed an integrative approach combining genome-scale metabolic modeling, metagenomic sequencing, and in vitro validation to explore Lactobacillus and C. albicans interactions. Pairwise simulations of 159 Lactobacillus strains with C. albicans revealed that most strains exhibit inhibitory effects, altering fungal amino acid and carbohydrate metabolism. Key inhibitory metabolites identified included formate, L-lactate, and L-malate. Metagenomic analysis of vaginal swabs from 20 vulvovaginal candidiasis (VVC) patients and 20 healthy women showed a correlation between Lactobacillus species abundance and reduced C. albicans colonization. In vitro experiments confirmed the inhibitory effects of these metabolites and the selected Lactobacillus strains on C. albicans growth, thereby validating our computational predictions. These findings provide insights into the metabolic interactions within the vaginal microbiome and pave the way for targeted microbial or metabolite-based therapeutic strategies to manage VVC.IMPORTANCEVulvovaginal candidiasis is a prevalent fungal infection with significant implications for women's health, caused primarily by Candida albicans. Although the protective role of a Lactobacillus-dominated vaginal microbiome is well established, the metabolic mechanisms underlying the interactions between Lactobacillus species and C. albicans remain inadequately understood. Specifically, the Lactobacillus species that effectively inhibit C. albicans and the metabolic pathways involved warrant further investigation. This study offers novel insights into the metabolic mechanisms underlying Lactobacillus antagonism against C. albicans. By identifying critical metabolic pathways and inhibitory metabolites, this study enhances our understanding of vaginal microbiome dynamics and host-microbe interactions. The findings suggest that key Lactobacillus strains and their metabolites could significantly reduce harmful levels of C. albicans, paving the way for future therapeutic strategies that leverage these microbial characteristics to promote vaginal health.}, }
@article {pmid40237489, year = {2025}, author = {Rybicka, I and Kaźmierczak, Z}, title = {The human phageome: niche-specific distribution of bacteriophages and their clinical implications.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {6}, pages = {e0178824}, pmid = {40237489}, issn = {1098-5336}, support = {UMO-2019/35/B/NZ7/01824//Narodowe Centrum Nauki/ ; UMO-2023/51/D/NZ7/02145//Narodowe Centrum Nauki/ ; }, mesh = {Humans ; *Bacteriophages/physiology/genetics/isolation &amp; purification ; *Bacteria/virology ; *Virome ; *Microbiota ; Gastrointestinal Microbiome ; }, abstract = {Bacteriophages (phages) play a crucial role in shaping the composition and diversity of the human microbiome across various body niches. Recent advancements in high-throughput sequencing technologies have enabled comprehensive analysis of the human phageome in different body sites. This review comprehensively analyzes phage populations across major human body niches, examining their distribution and dynamics through recent metagenomic discoveries. We explore how phage-bacteria interactions within different body sites contribute to homeostasis and disease development. Emerging evidence demonstrates that phageome perturbations can serve as early indicators of various disorders, particularly in the gut microbiome. Understanding these complex microbial interactions offers promising opportunities for developing novel diagnostic markers and therapeutic approaches. However, the causal relationship between phages, bacteria, and disease development remains unclear. Further research is needed to elucidate the role of phages in human health and disease and to explore their potential as diagnostic or therapeutic tools. Understanding the intricate interactions between phages, bacteria, and the human host is crucial for unraveling the complexities of the human microbiome and its impact on health and disease.}, }
@article {pmid40237336, year = {2025}, author = {Naspolini, NF and Schüroff, PA and Vanzele, PAR and Pereira-Santos, D and Valim, TA and Bonham, KS and Fujita, A and Passos-Bueno, MR and Beltrão-Braga, PCB and Carvalho, ACPLF and Klepac-Ceraj, V and Polanczyk, GV and Campos, AC and Taddei, CR}, title = {Exclusive breastfeeding is associated with the gut microbiome maturation in infants according to delivery mode.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2493900}, pmid = {40237336}, issn = {1949-0984}, support = {/WT_/Wellcome Trust/United Kingdom ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Infant ; *Breast Feeding ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Brazil ; Feces/microbiology ; Metagenomics ; *Delivery, Obstetric/methods ; Cohort Studies ; Infant, Newborn ; }, abstract = {Exclusive breastfeeding (EBF) plays a crucial role in infant gut microbiome assembly and development. However, few studies have investigated the effects of EBF in restoring a perturbed microbiome. In this study, we applied whole metagenomic sequencing to assess the gut microbiome assembly in 525 Brazilian infants from 3 to 9 months of age of the Germina Cohort, demonstrating the early determinants of microbial taxonomy and function modulation. Our analysis shows that EBF alters the relative abundance of genes related to the microbiome taxonomy and function, with effects varying by delivery mode. EBF alters the pattern of carbohydrates, lipid metabolism, and cell structure pathways depending on the delivery mode. The microbiome age is closer to chronological infant age in EBF than in non-EBF infants, meaning a lower microbiome maturation index (MMI). Using a complementary machine learning approach, we show that Escherichia coli, Ruminococcus gnavus, and Clostridium neonatale, as well as vitamin K and o-antigen pathways contribute strongly to EBF prediction. Moreover, EBF influences the microbiome maturation in early life, toward a microbiome age more similar to the chronological infant's age.}, }
@article {pmid40234093, year = {2025}, author = {Block, MS and Nelson, GD and Chen, J and Johnson, S and Yang, L and Flotte, TJ and Grewal, EP and McWilliams, RR and Kottschade, LA and Domingo-Musibay, E and Markovic, SN and Dimou, A and Montane, HN and Piltin, MA and Price, DL and Khariwala, SS and Hui, JYC and Erskine, CL and Strand, CA and Zahrieh, D and Dong, H and Hieken, TJ}, title = {Neoadjuvant cobimetinib and atezolizumab with or without vemurafenib for stage III melanoma: outcomes and the impact of the microbiome from the NeoACTIVATE trial.}, journal = {Journal for immunotherapy of cancer}, volume = {13}, number = {4}, pages = {}, pmid = {40234093}, issn = {2051-1426}, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; *Antibodies, Monoclonal, Humanized/pharmacology/therapeutic use ; *Antineoplastic Combined Chemotherapy Protocols/therapeutic use/pharmacology ; *Azetidines/therapeutic use/pharmacology ; Gastrointestinal Microbiome ; *Melanoma/drug therapy/pathology/mortality ; *Neoadjuvant Therapy/methods ; Neoplasm Staging ; *Piperidines/pharmacology/therapeutic use ; *Skin Neoplasms/drug therapy ; Treatment Outcome ; *Vemurafenib/pharmacology/therapeutic use ; }, abstract = {BACKGROUND: Neoadjuvant treatment has become standard for patients with high-risk operable stage III melanoma, but the optimal regimen is unknown. Targeted therapy approaches yield high pathological response rates, while immunotherapy regimens show favorable recurrence-free survival (RFS). NeoACTIVATE was designed to address whether a neoadjuvant combination of both targeted therapy and immunotherapy might leverage the benefits of each.<br><br>METHODS: We tested neoadjuvant treatment with 12 weeks of vemurafenib, cobimetinib, and atezolizumab for patients with BRAF-mutated (BRAFm) melanoma (cohort A) and cobimetinib and atezolizumab for patients with BRAF-wild-type (BRAFwt) melanoma (cohort B), regimens which we have shown generate a substantial major pathological response. After therapeutic lymph node dissection, patients received 24 weeks of adjuvant atezolizumab. Here, we report survival outcomes and their association with biomarkers assayed among the gut microbiome and peripheral blood immune subsets.<br><br>RESULTS: With 49 months median follow-up, the median RFS was not reached for cohort A and was 40.8 months for cohort B. At 24 months after operation, 2 of 14 cohort A patients and 4 of 13 cohort B patients had experienced distant relapse. Key findings from correlative analyses included diversity, taxonomic and functional metagenomic gut microbiome signals associated with distant metastasis-free survival at 2 years. Notably, we observed a strong correlation between low microbial arginine biosynthesis (required for T-cell activation and effector function) and early distant recurrence (p=0.0005), which correlated with taxonomic differential abundance findings. Peripheral blood immune monitoring revealed increased double-positive (CD4+CD8+) T cells in patients with early recurrence.<br><br>CONCLUSIONS: Neoadjuvant treatment with cobimetinib and atezolizumab&#xb1;vemurafenib was associated with a low rate of distant metastasis in patients with high-risk stage III melanoma. Freedom from early distant metastasis was highly associated with taxonomic differences in gut microbiome structure and with functional pathway alterations known to modulate T cell immunity. Identification of predictive biomarkers will permit optimization of neoadjuvant therapy regimens for individual patients.<br><br>TRIAL REGISTRATION NUMBER: NCT03554083.}, }
@article {pmid40233938, year = {2025}, author = {Kolokotronis, SO and Bhattacharya, C and Panja, R and Quate, I and Seibert, M and Jorgensen, E and Mason, CE and Hénaff, EM}, title = {Metagenomic interrogation of urban Superfund site reveals antimicrobial resistance reservoir and bioremediation potential.}, journal = {Journal of applied microbiology}, volume = {136}, number = {4}, pages = {}, pmid = {40233938}, issn = {1365-2672}, support = {R01 MH125246/MH/NIMH NIH HHS/United States ; 80NSSC24K0728/NASA/NASA/United States ; R01AI125416/NH/NIH HHS/United States ; 1758800//National Science Foundation/ ; }, mesh = {Biodegradation, Environmental ; Metagenomics ; *Microbiota/genetics ; Metals, Heavy/metabolism ; *Geologic Sediments/microbiology ; *Bacteria/genetics/metabolism/drug effects/isolation &amp; purification/classification ; Water Pollutants, Chemical/metabolism ; Polychlorinated Biphenyls/metabolism ; *Drug Resistance, Bacterial/genetics ; Metagenome ; }, abstract = {AIMS: We investigate the bioremediation potential of the microbiome of the Gowanus Canal, a contaminated waterway in Brooklyn, NY, USA, designated a Superfund site by the US Environmental Protection Agency due to high concentrations of contaminants, including polychlorinated biphenyls, petrochemicals, and heavy metals.<br><br>METHODS AND RESULTS: We present a metagenomic analysis of the Gowanus Canal sediment, consisting of a longitudinal study of surface sediment and a depth-based study of sediment core samples. We demonstrate that the resident microbiome includes 455 species, including extremophiles across a range of saltwater and freshwater species, which collectively encode 64 metabolic pathways related to organic contaminant degradation and 1171 genes related to heavy metal utilization and detoxification. Furthermore, our genetic screening reveals an environmental reservoir of antimicrobial resistance markers falling within 8 different classes of resistance, as well as de-novo characterization of 2319 biosynthetic gene clusters and diverse groups of secondary metabolites with biomining potential.<br><br>CONCLUSION: The microbiome of the Gowanus Canal is a biotechnological resource of novel metabolic functions that could aid in efforts for bioremediation, AMR reservoir mapping, and heavy metal mitigation.}, }
@article {pmid40233768, year = {2025}, author = {Tinker, KA and Anthony, W and Brandi, M and Flett, S and Bagwell, CE and Smallwood, C and Davis, R and Gulliver, D}, title = {Identifying Potential Geochemical and Microbial Impacts of Hydrogen Storage in a Deep Saline Aquifer.}, journal = {Environmental microbiology reports}, volume = {17}, number = {2}, pages = {e70076}, pmid = {40233768}, issn = {1758-2229}, support = {//U.S. Department of Energy's (DOE) Office of Fossil Energy and Carbon Management's Hydrogen with Carbon Management Program and executed through the National Energy Technology Laboratory (NETL) Research &amp; Innovation Center's Natural Gas Decarbonization and Hydrogen Technologies Multi-Year Research Plan/ ; }, mesh = {*Hydrogen/metabolism ; *Groundwater/microbiology/chemistry ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; Illinois ; Methane/metabolism ; Microbiota ; Metagenomics ; }, abstract = {Hydrogen is valuable commodity and a promising energy carrier for variable energy production. Storage of hydrogen may occur through injection of hydrogen or a hydrogen/methane gas blend in subsurface reservoirs. However, the geochemical and biological reactions that may impact the stored hydrogen are not yet understood. Therefore, we collected samples from a deep storage aquifer located in the St. Peter Formation in southern Illinois. The reservoir material was primarily quartz with sulphur and iron deposits, while the major constituents of the fluid were chloride and sulphate. 16S rRNA gene amplicon sequencing revealed a low biomass microbial community that contained no obvious hydrogen-consuming bacteria. Next, we enriched a field sample to increase the biomass and completed a metagenomic analysis, finding a low number of genes present that are associated with hydrogen consumption. Then, we completed a series of reactor experiments under reservoir conditions with 15% H2/85% CH4 gas simulating a short-term hydrogen storage, high withdrawal scenario. We found minimal changes in the geochemistry or microbiology for the reactor experiments. This work suggests that short-term storage may be highly successful, although significant additional work needs to be completed in order to accurately evaluate the risks associated with long-term hydrogen storage scenarios. It is essential we continue to expand our understanding of the dynamics present in saline aquifers and provide new insights into how hydrogen storage may impact underground geological storage environments.}, }
@article {pmid40233040, year = {2025}, author = {Pomej, K and Frick, A and Scheiner, B and Balcar, L and Pajancic, L and Klotz, A and Kreuter, A and Lampichler, K and Regnat, K and Zinober, K and Trauner, M and Tamandl, D and Gasche, C and Pinter, M}, title = {Study protocol: Fecal Microbiota Transplant combined with Atezolizumab/Bevacizumab in Patients with Hepatocellular Carcinoma who failed to achieve or maintain objective response to Atezolizumab/Bevacizumab - the FAB-HCC pilot study.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0321189}, pmid = {40233040}, issn = {1932-6203}, mesh = {Aged ; Female ; Humans ; Male ; Middle Aged ; *Antibodies, Monoclonal, Humanized/therapeutic use/administration &amp; dosage ; *Antineoplastic Combined Chemotherapy Protocols/therapeutic use ; *Bevacizumab/therapeutic use/administration &amp; dosage ; *Carcinoma, Hepatocellular/therapy/drug therapy ; *Fecal Microbiota Transplantation/methods ; Gastrointestinal Microbiome ; *Liver Neoplasms/therapy/drug therapy ; Pilot Projects ; Clinical Trials, Phase II as Topic ; }, abstract = {BACKGROUND: The gut microbiota is often altered in chronic liver diseases and hepatocellular carcinoma (HCC), and increasing evidence suggests that it may influence response to cancer immunotherapy. Strategies to modulate the gut microbiome (i.e., fecal microbiota transplant (FMT)) may help to improve efficacy of immune checkpoint inhibitors (ICIs) or even overcome resistance to ICIs. Here, we describe the design and rationale of FAB-HCC, a single-center, single-arm, phase II pilot study to assess safety, feasibility, and efficacy of FMT from patients with HCC who responded to PD-(L)1-based immunotherapy or from healthy donors to patients with HCC who failed to achieve or maintain a response to atezolizumab plus bevacizumab.<br><br>METHODS: In this single-center, single-arm, phase II pilot study (ClinicalTrials.gov identifier: NCT05750030), we plan to include 12 patients with advanced HCC who failed to achieve or maintain a response to atezolizumab/bevacizumab. Patients will receive a single FMT via colonoscopy from donors with HCC who responded to PD-(L)1-based immunotherapy or from healthy individuals, followed by atezolizumab/bevacizumab every 3 weeks. The primary endpoint is safety, measured by incidence and severity of treatment-related adverse events. The main secondary endpoint is efficacy, as assessed by best radiological response according to RECISTv1.1 and mRECIST. Additional exploratory endpoints include data on the effect of FMT on recipient gut microbiota, as well as metagenomic analysis of stool samples, analyses of circulating immune cells and serum and stool proteomic, metabolomic and lipidomic signatures.<br><br>DISCUSSION: The results of this study will help to define the potential of FMT as add-on intervention in the systemic treatment of advanced HCC, with the potential to improve efficacy of immunotherapy or even overcome resistance.<br><br>TRIAL REGISTRATION: EudraCT Number: 2022-000234-42 Clinical trial registry &amp; ID: ClinicalTrials.gov identifier: NCT05750030 (Registration date: 16.01.2023).}, }
@article {pmid40232948, year = {2025}, author = {Leech, SM and Barrett, HL and Dorey, ES and Mullins, T and Laurie, J and Nitert, MD}, title = {Consensus approach to differential abundance analysis detects few differences in the oral microbiome of pregnant women due to pre-existing type 2 diabetes mellitus.}, journal = {Microbial genomics}, volume = {11}, number = {4}, pages = {}, doi = {10.1099/mgen.0.001385}, pmid = {40232948}, issn = {2057-5858}, mesh = {Humans ; Female ; Pregnancy ; *Diabetes Mellitus, Type 2/microbiology/complications ; *Microbiota/genetics ; Adult ; *Diabetes, Gestational/microbiology ; Saliva/microbiology ; *Mouth/microbiology ; Metagenomics/methods ; Dysbiosis/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Oral microbiome dysbiosis has been proposed as a potential contributing factor to rising rates of diabetes in pregnancy, with oral health previously associated with an increased risk of numerous chronic diseases and complications in pregnancy, including gestational diabetes mellitus (GDM). However, whilst most studies examining the relationship between GDM and the oral microbiome identify significant differences, these differences are highly variable between studies. Additionally, no previous research has examined the oral microbiome of women with pre-existing type 2 diabetes mellitus (T2DM), which has greater risks of complications to both mother and baby. In this study, we compared the oral microbiome of 11 pregnant women with pre-existing T2DM with 28 pregnant normoglycaemic controls. We used shotgun metagenomic sequencing to examine buccal swab and saliva rinse samples at two time points between 26 and 38 weeks of gestation. To reduce variation caused by the choice of differential abundance analysis tool, we employed a consensus approach to identify differential taxa and pathways due to diabetes status. Differences were identified at the late time point only. In swab samples, there was increased Flavobacteriaceae, Capnocytophaga, Capnocytophaga gingivalis SGB2479, Capnocytophaga leadbetteri SGB2492 and Neisseria elongata SGB9447 abundance in T2DM as well as increased Shannon diversity and richness. In rinse samples, there was an increased abundance of Haemophilus, Pasteurellaceae, Pasteurellales and Proteobacteria. In contrast to studies of the oral microbiome in T2DM or GDM that use a single differential abundance analysis tool, our consensus approach identified few differences between pregnant women with and without T2DM.}, }
@article {pmid40230307, year = {2025}, author = {Liu, B and He, N and Li, H and Yang, Z and Lin, Y and Wu, X and Zhang, H and Zhang, Z and Zhang, Z and Tian, Y and Wu, Z and Zou, Y and Peng, J and Li, S}, title = {3-Fucosyllactose Prevents Nonalcoholic Fatty Liver Disease by Modulating the Gut Microbiota-Derived Pantothenate in Mice.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {16}, pages = {9637-9649}, doi = {10.1021/acs.jafc.5c00079}, pmid = {40230307}, issn = {1520-5118}, mesh = {*Gastrointestinal Microbiome/drug effects ; Animals ; Mice ; *Pantothenic Acid/metabolism ; *Non-alcoholic Fatty Liver Disease/metabolism/microbiology/prevention &amp; control/drug therapy ; Male ; Mice, Inbred C57BL ; Humans ; Diet, High-Fat/adverse effects ; Liver/metabolism ; *Trisaccharides/administration &amp; dosage ; Prebiotics/administration &amp; dosage/analysis ; Lipid Metabolism/drug effects ; Bacteria/isolation &amp; purification/classification/genetics/metabolism ; }, abstract = {Nonalcoholic fatty liver disease (NAFLD) is a growing global health threat. Human milk oligosaccharides (HMOs) exhibit prebiotic properties that may alleviate NAFLD progression. Herein, our study demonstrates that 3-fucosyllactose (3-FL), a distinctive and crucial HMO, significantly attenuates body weight gain, enhances hepatic lipid metabolism, and reduces inflammation in a high-fat diet (HFD)-induced NAFLD mouse model. These findings suggest its potential as a dietary supplement for preventing and alleviating NAFLD progression. Subsequently, fecal metagenomic and nontargeted metabolomics analyses revealed that 3-FL treatment significantly alleviated HFD-induced gut microbiota dysbiosis, with a specific enhancement of the pantothenate (vitamin B5) metabolic pathways. Our targeted metabolite analysis further revealed a significant increase in both hepatic and fecal pantothenate concentrations, which contributed to the enhancement of the coenzyme A (CoA)-mediated lipid metabolism pathway. Furthermore, the subsequent population cohort analyses revealed a significant correlation between serum pantothenate levels and the progression of NAFLD, thereby reinforcing its candidacy as a noninvasive diagnostic biomarker. These findings show that 3-FL acts as an effective prebiotic to alleviate NAFLD symptoms, in part by enhancing the gut microbiota-mediated pantothenate/CoA metabolic pathway.}, }
@article {pmid40229213, year = {2025}, author = {Hoops, SL and Moutsoglou, D and Vaughn, BP and Khoruts, A and Knights, D}, title = {Metagenomic source tracking after microbiota transplant therapy.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2487840}, pmid = {40229213}, issn = {1949-0984}, mesh = {Humans ; *Metagenomics/methods ; *Fecal Microbiota Transplantation ; *Gastrointestinal Microbiome/genetics ; Colitis, Ulcerative/therapy/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; *Metagenome ; Bayes Theorem ; Feces/microbiology ; }, abstract = {Reliable engraftment assessment of donor microbial communities and individual strains is an essential component of characterizing the pharmacokinetics of microbiota transplant therapies (MTTs). Recent methods for measuring donor engraftment use whole-genome sequencing and reference databases or metagenome-assembled genomes (MAGs) to track individual bacterial strains but lack the ability to disambiguate DNA that matches both donor and patient microbiota. Here, we describe a new, cost-efficient analytic pipeline, MAGEnTa, which compares post-MTT samples to a database comprised MAGs derived directly from donor and pre-treatment metagenomic data, without relying on an external database. The pipeline uses Bayesian statistics to determine the likely sources of ambiguous reads that align with both the donor and pre-treatment samples. MAGEnTa recovers engrafted strains with minimal type II error in a simulated dataset and is robust to shallow sequencing depths in a downsampled dataset. Applying MAGEnTa to a dataset from a recent MTT clinical trial for ulcerative colitis, we found the results to be consistent with 16S rRNA gene SourceTracker analysis but with added MAG-level specificity. MAGEnTa is a powerful tool to study community and strain engraftment dynamics in the development of MTT-based treatments that can be integrated into frameworks for functional and taxonomic analysis.}, }
@article {pmid40228693, year = {2025}, author = {Ma, JY and Liu, JH and Chen, CZ and Zhang, YZ and Guo, ZS and Song, MP and Jiang, F and Chai, ZT and Li, Z and Lv, SX and Zhen, YJ and Wang, L and Liang, ZL and Jiang, ZY}, title = {Characteristics of microbial carbon pump in the sediment of kelp aquaculture zone and its contribution to recalcitrant dissolved organic carbon turnover: insights into metabolic patterns and ecological functions.}, journal = {Environmental research}, volume = {277}, number = {}, pages = {121559}, doi = {10.1016/j.envres.2025.121559}, pmid = {40228693}, issn = {1096-0953}, mesh = {*Geologic Sediments/microbiology/chemistry ; Aquaculture ; *Carbon/metabolism ; *Kelp ; Microbiota ; *Carbon Cycle ; }, abstract = {The study delves into the microbial carbon pump (MCP) within the sediments of kelp aquaculture zones, focusing on its influence on the turnover of recalcitrant dissolved organic carbon (RDOC). Following kelp harvest, significant alterations in the microbial community structure were noted, with a decrease in complexity and heterogeneity within co-occurrence networks potentially impacting RDOC production efficiency. Metabolic models constructed identified four key microbial lineages crucial for RDOC turnover, with their abundance observed to decrease post-harvest. Analysis of metabolic complementarity revealed that RDOC-degrading microorganisms exhibit broad substrate diversity and are engaged in specific resource exchange patterns, with cross-feeding interactions possibly enhancing the ecological efficiency of the MCP. Notably, the degradation of RDOC was found not to deplete the RDOC pool; as aromatic compounds break down, new ones are released into the environment, thus supporting the renewal of the RDOC pool. The research highlights the pivotal role of microbial communities in RDOC turnover and offers fresh insights into their cross-feeding behavior related to RDOC cycling, providing valuable data to support the future development and application of MCP theory.}, }
@article {pmid40226542, year = {2025}, author = {Cao, J and Wang, S and Ding, R and Liu, Y and Yuan, B}, title = {Comparative analyses of the gut microbiome of two sympatric rodent species, Myodes rufocanus and Apodemus peninsulae, in northeast China based on metagenome sequencing.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e19260}, pmid = {40226542}, issn = {2167-8359}, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; China ; *Arvicolinae/microbiology ; *Murinae/microbiology ; *Metagenome ; Metagenomics ; High-Throughput Nucleotide Sequencing ; Proteobacteria/genetics/isolation &amp; purification ; Firmicutes/genetics/isolation &amp; purification ; Sympatry ; Bacteroidetes/genetics/isolation &amp; purification ; }, abstract = {The gut microbiota is integral to an animal's physiology, influencing nutritional metabolism, immune function, and environmental adaptation. Despite the significance of gut microbiota in wild rodents, the Korean field mouse (Apodemus peninsulae) and the gray red-backed vole (Myodes rufocanus) remain understudied. To address this, a metagenomic sequencing analysis of the gut microbiome of these sympatric rodents in northeast China's temperate forests was conducted. Intestinal contents were collected from A. peninsulae and M. rufocanus within the Mudanfeng National Nature Reserve. High-throughput sequencing elucidated the gut microbiome's composition, diversity, and functional pathways. Firmicutes, Bacteroidetes, and Proteobacteria were identified as the dominant phyla, with M. rufocanus showing greater microbiome diversity. Key findings indicated distinct gut bacterial communities between the species, with M. rufocanus having a higher abundance of Proteobacteria. The gut microbiota of A. peninsulae and M. rufocanus differed marginally in functional profiles, specifically in the breakdown of complex carbohydrates, which might reflect their distinct food preferences albeit both being herbivores with a substantial dietary overlap. The investigation further elucidated gut microbiota's contributions to energy metabolism and environmental adaptation mechanisms. This study aligns with information on rodent gut microbiota in literature and highlights the two understudied rodent species, providing comparative data for future studies investigating the role of gut microbiota in wildlife health and ecosystem functioning.}, }
@article {pmid40223703, year = {2025}, author = {Gao, M and Zhang, Q and Chen, B and Lei, C and Xia, Q and Sun, L and Li, T and Zhou, NY and Lu, T and Qian, H}, title = {Global Geographic Patterns of Soil Microbial Degradation Potential for Polycyclic Aromatic Hydrocarbons.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {15}, pages = {7550-7560}, doi = {10.1021/acs.est.5c00306}, pmid = {40223703}, issn = {1520-5851}, mesh = {*Polycyclic Aromatic Hydrocarbons/metabolism ; *Soil Microbiology ; Biodegradation, Environmental ; Soil/chemistry ; Soil Pollutants/metabolism ; Bacteria/metabolism ; Microbiota ; }, abstract = {Polycyclic aromatic hydrocarbons (PAHs) are toxic and persistent pollutants that are widely distributed in the environment. PAHs are toxic to microorganisms and pose ecological risks. Bacteria encode enzymes for PAH degradation through specific genes, thereby mitigating PAH pollution. However, due to PAHs' complexity, information on the global degradation potential, diversity, and associated risks of PAH-degrading microbes in soils is lacking. In this study, we analyzed 121 PAH-degrading genes and selected 33 as marker genes to predict the degradation potential within the soil microbiome. By constructing a Hidden Markov Model, we identified 4990 species carrying PAH-degrading genes in 40,039 soil metagenomic assembly genomes, with Burkholderiaceae and Stellaceae emerging as high-potential degraders. We demonstrated that the candidate PAH degraders predominantly emerged in artificial soil and farmland, with significantly fewer present in extreme environments, driven by factors such as average annual rainfall, organic carbon, and human modification of terrestrial systems. Furthermore, we comprehensively quantified the potential risks of each potential host in future practical applications using three indicators (antibiotic resistance genes, virulence factors, and pathogenic bacteria). We found that the degrader Stellaceae has significant application prospects. Our research will help determine the biosynthetic potential of PAH-degrading enzymes globally and further identify potential PAH-degrading bacteria at lower risk.}, }
@article {pmid40223273, year = {2025}, author = {Yang, SY and Han, SM and Lee, JY and Kim, KS and Lee, JE and Lee, DW}, title = {Advancing Gut Microbiome Research: The Shift from Metagenomics to Multi-Omics and Future Perspectives.}, journal = {Journal of microbiology and biotechnology}, volume = {35}, number = {}, pages = {e2412001}, pmid = {40223273}, issn = {1738-8872}, mesh = {*Gastrointestinal Microbiome/physiology ; Humans ; Metagenomics/trends ; Multiomics/trends ; *Host Microbial Interactions/physiology ; *Translational Research, Biomedical/methods/trends ; Precision Medicine/methods/trends ; }, abstract = {The gut microbiome, a dynamic and integral component of human health, has co-evolved with its host, playing essential roles in metabolism, immunity, and disease prevention. Traditional microbiome studies, primarily focused on microbial composition, have provided limited insights into the functional and mechanistic interactions between microbiota and their host. The advent of multi-omics technologies has transformed microbiome research by integrating genomics, transcriptomics, proteomics, and metabolomics, offering a comprehensive, systems-level understanding of microbial ecology and host-microbiome interactions. These advances have propelled innovations in personalized medicine, enabling more precise diagnostics and targeted therapeutic strategies. This review highlights recent breakthroughs in microbiome research, demonstrating how these approaches have elucidated microbial functions and their implications for health and disease. Additionally, it underscores the necessity of standardizing multi-omics methodologies, conducting large-scale cohort studies, and developing novel platforms for mechanistic studies, which are critical steps toward translating microbiome research into clinical applications and advancing precision medicine.}, }
@article {pmid40223231, year = {2025}, author = {Lin, H and Chen, Y and Zhou, M and Wang, H and Chen, L and Zheng, L and Wang, Z and Zheng, X and Lu, S}, title = {Comprehensive analysis of faecal metagenomic and serum metabolism revealed the role of gut microbes and related metabolites in detecting colorectal lateral spreading tumours.}, journal = {Virulence}, volume = {16}, number = {1}, pages = {2489154}, pmid = {40223231}, issn = {2150-5608}, mesh = {Humans ; *Colorectal Neoplasms/diagnosis/microbiology/pathology/metabolism/blood ; *Gastrointestinal Microbiome ; *Feces/microbiology/chemistry ; Male ; Female ; Middle Aged ; Metagenomics ; Aged ; Metabolomics ; Dysbiosis/microbiology ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metabolic Networks and Pathways ; Case-Control Studies ; Adult ; }, abstract = {Colorectal lateral spreading tumours (LST), early-stage lesions of colorectal cancer (CRC), are associated with gut microbiota dysbiosis. However, the functional alterations in gut microbiota and their metabolic pathways remain inadequately understood. This study employed propensity score matching to compare 35 LST patients with 35 healthy controls. Metagenomic and metabolomic analyses revealed notable differences in gut microbiota composition and metabolic pathways. LST patients exhibited a marked reduction in short-chain fatty acid (SCFA)-producing probiotics, such as Roseburia, Clostridium, and Butyricicoccus sp-OF13-6, alongside anti-inflammatory metabolites. In contrast, potential intestinal pathogens linked to inflammatory bowel disease (IBD), including Escherichia and Citrobacter amalonaticus, were significantly enriched. Orthogonal partial least squares discriminant analysis (OPLS-DA) highlighted significant metabolic disparities between the groups, with enrichment in pathways associated with cholesterol metabolism, choline metabolism in cancer, and amino acid metabolism - all relevant to cancer progression. Key biomarkers identified for LST included fumarate, succinate, glutamic acid, glycine, and L-aspartic acid, which were closely linked to these pathways. Functional studies demonstrated that these metabolites promoted the proliferation and invasion of HCT-116 and SW480 human colorectal cancer cells in vitro. Metagenomic and metabolomic analysis revealed a strong positive correlation between Escherichia and Ruminococcus sp-AM41-2AC abundance and the enriched pathways, whereas reductions in Roseburia species, including Roseburia-OF03-24 and Roseburia intestinalis_CAG13-exhibited negative correlations. These results suggest that gut microbiota and metabolite alterations in LST contribute to intestinal inflammation and CRC development, underscoring their potential as biomarkers for early detection and therapeutic targets.}, }
@article {pmid40222673, year = {2025}, author = {Fu, CM and Luo, SQ and Tang, DR and Zhang, YM and Xu, JW and Lin, LB and Zhang, QL}, title = {Effect of bacteriocin RSQ01 on milk microbiota during pasteurized milk preservation.}, journal = {Journal of dairy science}, volume = {108}, number = {6}, pages = {5705-5718}, doi = {10.3168/jds.2025-26395}, pmid = {40222673}, issn = {1525-3198}, mesh = {Animals ; *Milk/microbiology ; *Bacteriocins/pharmacology ; Pasteurization ; *Microbiota/drug effects ; Food Preservation/methods ; }, abstract = {Milk has high risk for microbial contamination. RSQ01, a bacteriocin, previously has shown potentiality for pasteurized milk preservation. This study analyzed the effects of RSQ01 on milk microbiota by comparison of bacterial number and composition in 3 pasteurized milk groups: controls without RSQ01, treatment group with the addition of 2× MIC (low concentration), and treatment group with the addition of 4× MIC RSQ01 (high concentration). Integrated 16S ribosomal DNA sequencing and metagenomics of these groups after 3 d of storage showed inhibition of RSQ01 on microbiota diversity. Pathogenic bacteria such as Salmonella showed a decrease in relative abundance after RSQ01 treatment, whereas probiotic bacteria such as Lactococcus showed an increase, indicating that RSQ01 contributed to milk preservation by maintaining a low abundance of pathogens and a relatively high abundance of probiotics. Further investigations revealed that milk preservation was primarily attributed to the ability of RSQ01 to decrease the relative abundance of genes related to metabolism of energy and nutrients (e.g., vitamins, lipids, and AA) of microbiota, with change of genetic, environmental, and cellular processes. Interestingly, RSQ01 generally reduced the relative abundance of virulence factors and quorum-sensing-related genes in microbiota, likely reducing virulence and resistance. The findings provided insights into microbiomics mechanisms regarding pasteurized milk preservation of bacteriocins.}, }
@article {pmid40222470, year = {2025}, author = {Yang, X and Yu, X and Ming, Y and Liu, H and Zhu, W and Yan, B and Huang, H and Ding, L and Qian, X and Wang, Y and Wu, K and Niu, M and Yan, Q and Huang, X and Wang, C and Wang, Y and He, Z}, title = {The vertical distribution and metabolic versatility of complete ammonia oxidizing communities in mangrove sediments.}, journal = {Environmental research}, volume = {277}, number = {}, pages = {121602}, doi = {10.1016/j.envres.2025.121602}, pmid = {40222470}, issn = {1096-0953}, mesh = {*Ammonia/metabolism ; *Geologic Sediments/microbiology ; *Wetlands ; Archaea/metabolism/genetics ; *Bacteria/metabolism/genetics ; Oxidation-Reduction ; Metagenome ; Microbiota ; }, abstract = {Recently discovered complete ammonia-oxidizing (comammox) microorganisms can completely oxidize ammonia to nitrate and play an important role in the nitrogen (N) cycle across various ecosystems. However, little is known about the vertical distribution and metabolic versatility of comammox communities in mangrove ecosystems. Here we profiled comammox communities from deep sediments (up to 5 m) in a mangrove wetland by combining metagenome sequencing and physicochemical properties analysis. Our results showed that the relative abundance of comammox bacteria (23.2 %) was higher than ammonia-oxidizing bacteria (AOB, 12.0 %), but lower than ammonia-oxidizing archaea (AOA, 64.8 %). The abundance of comammox communities significantly (p < 0.01) decreased with the sediment depth, and dissolved organic carbon and total sulfur appeared to be major environmental factors influencing the nitrifying microbial community structure. We also recovered a high-quality metagenome-assembled genome (MAG) of comammox bacteria (Nitrospira sp. bin2030) affiliated with comammox clade A. Nitrospira sp. bin2030 possessed diverse metabolic processes, not only the key genes for ammonia oxidation and urea utilization in the N cycle, but also key genes involved in carbon and energy metabolisms, sulfur metabolism, and environmental adaptation (e.g., oxidative stress, salinity, temperature, heavy metal tolerance). The findings advance our understanding of vertical distribution and metabolic versatility of comammox communities in mangrove sediments, having important implications for quantifying their contribution to nitrification processes in mangrove ecosystems.}, }
@article {pmid40221653, year = {2025}, author = {Babalola, OO and Adebayo, AA and Enagbonma, BJ}, title = {Shotgun metagenomics dataset of the core rhizo-microbiome of monoculture and soybean-precedent carrot.}, journal = {BMC genomic data}, volume = {26}, number = {1}, pages = {26}, pmid = {40221653}, issn = {2730-6844}, mesh = {*Daucus carota/microbiology ; *Metagenomics/methods ; *Rhizosphere ; *Glycine max/microbiology/growth &amp; development ; *Microbiota ; Soil Microbiology ; High-Throughput Nucleotide Sequencing ; }, abstract = {OBJECTIVES: Carrot is a significant vegetable crop contributing to agricultural diversity and food security, but less is known about the core microbiome associated with its rhizosphere. More so, the effect of preceding crop and cropping history on the composition and diversity of carrot rhizo-microbiome remains largely unknown. With shotgun metagenomics, the study unveils how cropping systems direct rhizo-microbiome structure and functions, previously limited by other methods.<br><br>DATA DESCRIPTION: Metagenomic-DNA molecule was extracted from four replicates each (12 samples) of a distant bulk soil and the rhizosphere soils from monoculture and soybean-precedent carrots, with the Power soil&#xae; DNA Isolation kit. The DNA samples were subjected to Next Generation Sequencing using the Illumina Novaseq X Plus (PE 150) platform. Raw sequencing reads were assembled and annotated with MEGAHIT and LCA algorithms in MEGAN software respectively, before a quality control check was done with FASTP. CD-Hit was used to de-replicate the sequences and the removal of host genomic-DNA and contaminant sequences was done with Bowtie2. The clean sequence data, in FastQ files, were analyzed for taxonomic classification and functional diversity of the rhizosphere microbiome using the Micro_NR and KEGG database respectively. The findings provide insights into microbiome dynamics, with potential implications for sustainable agricultural practices.}, }
@article {pmid40221512, year = {2025}, author = {Yong, Y and Zhou, L and Zhang, X and Ran, X and Guo, Y and Gai, W and Chen, Y}, title = {The clinical value of metagenomic next-generation sequencing in the diagnosis of pulmonary tuberculosis and the exploration of lung microbiota characteristics.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {12568}, pmid = {40221512}, issn = {2045-2322}, support = {82104236//National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Tuberculosis, Pulmonary/diagnosis/microbiology ; Male ; Female ; Middle Aged ; *Lung/microbiology ; *Microbiota/genetics ; Adult ; *Mycobacterium tuberculosis/genetics/isolation &amp; purification ; *High-Throughput Nucleotide Sequencing/methods ; Retrospective Studies ; *Metagenomics/methods ; Bronchoalveolar Lavage Fluid/microbiology ; Aged ; }, abstract = {The lung microbiota plays a critical role in many important physiological processes and is linked with various pulmonary infectious diseases. The present study aimed to characterize the lung microbiota in patients with pulmonary tuberculosis (PTB), and to explore the association between the abundance of Mycobacterium tuberculosis complex (MTBC) and the lung microbiota. This retrospective study included 190 patients with MTBC infection. The enrolled patients were classified into three groups based on the abundance results of bronchoalveolar lavage fluid (BALF) mNGS: low [reads per ten million (RPTM) = 1 ~ 1000], medium (RPTM = 1001 ~ 10000) and high (RPTM > 10000). In the high-abundance group, there were more bilateral lobar involvement and symptoms of cavitation. In addition to mNGS, the highest positivity rates were T-spot (92.36%), GeneXpert (71.58%), culture (68.95%) and AFB smear (17.84%). The positive rates of culture, AFB smear and GeneXpert increased with the increase of MTBC abundance, and the positive rates were highest in the high-abundance MTBC group. Both the alpha and beta diversity showed significant difference between the three groups, with the high-abundance MTBC groups showed lowest alpha diversity. The increased abundance of MTBC positively associated with the longer time of hospital stay. To sum up, the lung microbiota of patients with PTB were significantly distinct between groups with different abundant levels of MTBC. Combined with imaging features, a high abundance of MTBC suggests the patient is more severely ill and has a poorer prognosis.}, }
@article {pmid40221450, year = {2025}, author = {Kim, KS and Noh, J and Kim, BS and Koh, H and Lee, DW}, title = {Refining microbiome diversity analysis by concatenating and integrating dual 16S rRNA amplicon reads.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {57}, pmid = {40221450}, issn = {2055-5008}, support = {RS-2021-NR056579//National Research Foundation of Korea (NRF)/ ; RS-2023-KH141436//Ministry of Health and Welfare (Ministry of Health, Welfare and Family Affairs)/ ; 200118770//Ministry of Trade, Industry and Energy (Ministry of Trade, Industry and Energy, Korea)/ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; Humans ; *Gastrointestinal Microbiome/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; *Metagenomics/methods ; Sequence Analysis, DNA/methods ; Metagenome ; Colitis, Ulcerative/microbiology ; DNA, Bacterial/genetics ; Republic of Korea ; Phylogeny ; Feces/microbiology ; Biodiversity ; High-Throughput Nucleotide Sequencing ; }, abstract = {Understanding the role of human gut microbiota in health and disease requires insights into its taxonomic composition and functional capabilities. This study evaluates whether concatenating paired-end reads enhances data output for gut microbiome analysis compared to the merging approach across various regions of the 16S rRNA gene. We assessed this approach in both mock communities and Korean cohorts with or without ulcerative colitis. Our results indicate that using the direct joining method for the V1-V3 or V6-V8 regions improves taxonomic resolution compared to merging paired-end reads (ME) in post-sequencing data. While predicting microbial function based on 16S rRNA sequencing has inherent limitations, integrating sequencing reads from both the V1-V3 and V6-V8 regions enhanced functional predictions. This was confirmed by whole metagenome sequencing (WMS) of Korean cohorts, where our approach improved taxa detection that was lost using the ME method. Thus, we propose that the integrated dual 16S rRNA sequencing technique serves as a valuable tool for microbiome research by bridging the gap between amplicon sequencing and WMS.}, }
@article {pmid40220806, year = {2025}, author = {Ye, G and Li, M and Huang, H and Avellán-Llaguno, RD and Chen, J and Chen, G and Huang, Q}, title = {Polystyrene microplastic exposure induces selective accumulation of antibiotic resistance genes in gut microbiota and its potential health risks.}, journal = {International journal of biological macromolecules}, volume = {309}, number = {Pt 3}, pages = {142983}, doi = {10.1016/j.ijbiomac.2025.142983}, pmid = {40220806}, issn = {1879-0003}, mesh = {*Gastrointestinal Microbiome/drug effects/genetics ; Animals ; Rats ; *Polystyrenes/toxicity ; *Microplastics/toxicity ; *Drug Resistance, Microbial/genetics/drug effects ; Metagenomics ; Anti-Bacterial Agents/pharmacology ; Humans ; *Genes, Bacterial ; Male ; *Drug Resistance, Bacterial/genetics/drug effects ; Bacteria/genetics/drug effects ; }, abstract = {As emerging pollutants, antibiotic resistance genes (ARGs) and microplastics threaten the environment and human health. Gut microbiota is a hotspot for ARG emergence and spread. However, effects of microplastic exposure on the emergence and spread of gut microbial ARGs are unclear. Therefore, metagenomics was used to characterize polystyrene microplastics (PS)-induced ARG alterations in rat gut microbiota and their health risks, and to identify key ARG hosts and pathways as intervention targets. We found that PS exposure not only induced selective accumulation of glycopeptide and aminoglycoside ARGs, but also promoted mobility risks of glycopeptide and macrolide-lincosamide-streptogramin ARGs in gut microbiota. Metagenomic reassembly identified microbes belonging to Firmicutes (particularly order Clostridiales, such as speices Lachnospiraceae bacterium 3-1 and MD335) as major ARG hosts. Meanwhile, genera Enterococcus, Clostridioides and Streptococcus were main ARG hosts among human pathogens. Furthermore, glycopeptide and aminoglycoside ARGs were highly correlated with VanS/VanR signaling and its regulatory pathways of vancomycin resistance and peptidoglycan metabolism, amino sugar and nucleotide sugar metabolism, and CpxR signaling and its regulatory remodeling of cell envelope peptidoglycans and proteins in gut microbiota upon PS exposure. This study provides novel insights and intervention targets involved in PS-induced changes in gut microbial ARGs and their health risks.}, }
@article {pmid40220715, year = {2025}, author = {Chen, Y and Chen, Z and Liang, L and Li, J and Meng, L and Yuan, W and Xie, B and Zhang, X and Feng, L and Jia, Y and Fu, Z and Su, P and Tong, Z and Zhong, J and Liu, X}, title = {Multi-kingdom gut microbiota dysbiosis is associated with the development of pulmonary arterial hypertension.}, journal = {EBioMedicine}, volume = {115}, number = {}, pages = {105686}, pmid = {40220715}, issn = {2352-3964}, mesh = {*Dysbiosis/microbiology/complications ; *Gastrointestinal Microbiome ; Animals ; Rats ; Humans ; Fecal Microbiota Transplantation ; Male ; Disease Models, Animal ; *Pulmonary Arterial Hypertension/etiology/microbiology ; Metagenomics/methods ; Female ; Middle Aged ; Bacteria/genetics/classification ; }, abstract = {BACKGROUND: Gut microbiota dysbiosis has been implicated in pulmonary arterial hypertension (PAH). However, the exact roles and underlying mechanisms of multi-kingdom gut microbiota, including bacteria, archaea, and fungi, in PAH remain largely unclear.<br><br>METHODS: The shotgun metagenomics was used to analyse multi-kingdom gut microbial communities in patients with idiopathic PAH (IPAH) and healthy controls. Furthermore, fecal microbiota transplantation (FMT) was performed to transfer gut microbiota from IPAH patients or monocrotaline (MCT)-PAH rats to normal rats and from normal rats to MCT-PAH rats.<br><br>FINDINGS: Gut microbiota analysis revealed substantial alterations in the bacterial, archaeal, and fungal communities in patients with IPAH compared with healthy controls. Notably, FMT from IPAH patients or MCT-PAH rats induced PAH phenotypes in recipient rats. More intriguingly, FMT from normal rats to MCT-PAH rats significantly ameliorated PAH symptoms; restored gut bacteria, archaea, and fungi composition; and shifted the plasma metabolite profiles of MCT-PAH rats toward those of normal rats. In parallel, RNA-sequencing analysis demonstrated the expression of genes involved in key signalling pathways related to PAH. A panel of multi-kingdom markers exhibited superior diagnostic accuracy compared with single-kingdom panels for IPAH.<br><br>INTERPRETATION: Our findings established an association between multi-kingdom gut microbiota dysbiosis and PAH, thereby indicating the therapeutic potential of FMT in PAH. More importantly, apart from gut bacteria, gut archaea and fungi were also significantly associated with PAH pathogenesis, highlighting their indispensable role in PAH.<br><br>FUNDING: This work was supported by Noncommunicable Chronic Diseases-National Science and Technology Major Projects No. 2024ZD0531200, No. 2024ZD0531201 (Research on Prevention and Treatment of Cancer, Cardiovascular and Cerebrovascular Diseases, Respiratory Diseases, and Metabolic Diseases), the National Natural Science Foundation of China of China (No. 82170302, 82370432), Financial Budgeting Project of Beijing Institute of Respiratory Medicine (Ysbz2025004, Ysbz2025007), National clinical key speciality construction project Cardiovascular Surgery, Reform and Development Program of Beijing Institute of Respiratory Medicine (Ggyfz202417, Ggyfz202501), Clinical Research Incubation Program of Beijing Chaoyang Hospital Affiliated to Capital Medical University (CYFH202209).}, }
@article {pmid40220550, year = {2025}, author = {Silva, CJFD and Silva, CVFD and Cardoso, AM and de Oliveira Santos, E}, title = {Exploring clinical parameters and salivary microbiome profiles associated with metabolic syndrome in a population of Rio de Janeiro, Brazil.}, journal = {Archives of oral biology}, volume = {175}, number = {}, pages = {106251}, doi = {10.1016/j.archoralbio.2025.106251}, pmid = {40220550}, issn = {1879-1506}, mesh = {Humans ; *Metabolic Syndrome/microbiology ; Brazil/epidemiology ; Male ; Female ; *Saliva/microbiology ; Middle Aged ; Adult ; *Microbiota ; Body Mass Index ; Waist Circumference ; Triglycerides/blood ; Obesity ; }, abstract = {OBJECTIVES: This study investigates for the first time the association between metabolic syndrome and oral microbial profiles in a population-based sample from Rio de Janeiro, Brazil.<br><br>DESIGN: We assessed 66 volunteers, collecting detailed sociodemographic, anthropometric, and clinical data alongside salivary samples for metagenomic analysis.<br><br>RESULTS: Our findings reveal significant differences in anthropometric parameters, including waist circumference, glycemia, High-Density Lipoprotein (HDL), and triglycerides between the metabolic syndrome and control groups. Increased abundance of Bacteroidetes and Bacteroidia was observed in the metabolic syndrome group, suggesting a potential link between these phyla and metabolic dysregulation. While no significant differences in alpha diversity were found between the overall groups, stratification by body mass index (BMI) indicated that the normal weight subgroup without Metabolic Syndrome exhibited notable variations compared to overweight and obese individuals.<br><br>CONCLUSIONS: This study identifies specific shifts in oral microbiota composition that are associated with metabolic syndrome, highlighting their potential as microbial biomarkers for this condition. These findings suggest a link between oral dysbiosis and metabolic dysregulation, providing new insights into the pathophysiology of metabolic syndrome. Additionally, the results pave the way for the development of non-invasive diagnostics tools and targeted therapies that leverage the oral microbiome's role in systemic health.}, }
@article {pmid40216789, year = {2025}, author = {Shekarriz, S and Szamosi, JC and Whelan, FJ and Lau, JT and Libertucci, J and Rossi, L and Fontes, ME and Wolfe, M and Lee, CH and Moayyedi, P and Surette, MG}, title = {Detecting microbial engraftment after FMT using placebo sequencing and culture enriched metagenomics to sort signals from noise.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {3469}, pmid = {40216789}, issn = {2041-1723}, mesh = {Humans ; *Fecal Microbiota Transplantation/methods ; *Metagenomics/methods ; *Colitis, Ulcerative/therapy/microbiology ; *Gastrointestinal Microbiome/genetics ; Feces/microbiology ; Male ; Female ; Placebos ; Adult ; Middle Aged ; }, abstract = {Fecal microbiota transplantation (FMT) has shown efficacy for the treatment of ulcerative colitis but with variable response between patients and trials. The mechanisms underlying FMT's therapeutic effects remains poorly understood but is generally assumed to involve engraftment of donor microbiota into the recipient's microbiome. Reports of microbial engraftment following FMT have been inconsistent between studies. Here, we investigate microbial engraftment in a previous randomized controlled trial (NCT01545908), in which FMT was sourced from a single donor, using amplicon-based profiling, shotgun metagenomics, and culture-enriched metagenomics. Placebo samples were included to estimate engraftment noise, and a significant level of false-positive engraftment was observed which confounds the prediction of true engraftment. We show that analyzing engraftment across multiple patients from a single donor enhances the accuracy of detection. We identified a unique set of genes engrafted in responders to FMT which supports strain displacement as the primary mechanism of engraftment in our cohort.}, }
@article {pmid40216686, year = {2025}, author = {Fan, Q and Zhang, Y and Lian, J and Liang, D and Yu, J and Liu, X and Zhang, N}, title = {Screening and community succession and functional prediction of high-efficiency degradation microbial communities for rice straw at low-temperature.}, journal = {Extremophiles : life under extreme conditions}, volume = {29}, number = {2}, pages = {20}, pmid = {40216686}, issn = {1433-4909}, support = {2023YFD2100803//National Key R&amp;D Programme Project of China/ ; }, mesh = {*Oryza/microbiology/metabolism ; *Microbiota ; *Cold Temperature ; Lignin/metabolism ; }, abstract = {Traditional straw return relies on microbial degradation, but cold winters delay it, risking crops. Therefore, a microbial community adapted to rice straw degradation in cold regions was constructed by restrictive consecutively sub-cultured under low-temperature limitations. The capabilities of the microbial community, such as adaptability, stability, and degradation power, were evaluated by analyzing straw degradation features, Characterization experiments and lignocellulose enzyme activities across multiple generations. 16S amplicon sequencing was used to monitor the changes in its structure over generations. Metagenomic sequencing uses CAZy and KEGG to classify gene functions. The results showed that the highest degradation efficiencies and enzyme activities were observed in the E and F generations, dominated by Proteobacteria, Bacteroidetes, and Fungi The stable microbial community was designated as LJ-7. Metagenomic analysis showed that functional genes of LJ-7 were mainly concentrated in glycoside hydrolase (GHs) and glycosyl transferase (GTs) related genes which contained many fiber and lignin-degrading enzyme genes. It is speculated that microbial enzymes degrade straw by breaking down its complex structure into monosaccharides or metabolizing quinone compounds for energy. This experiment successfully screened a microbial community capable of degrading rice straw at low temperatures, thus offering novel research insights and pathways for straw degradation in cold conditions.}, }
@article {pmid40216167, year = {2025}, author = {Sangfuang, N and Xie, Y and McCoubrey, LE and Taub, M and Favaron, A and Mai, Y and Gaisford, S and Basit, AW}, title = {Investigating the bidirectional interactions between senotherapeutic agents and human gut microbiota.}, journal = {European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences}, volume = {209}, number = {}, pages = {107098}, doi = {10.1016/j.ejps.2025.107098}, pmid = {40216167}, issn = {1879-0720}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; Quercetin/pharmacology ; *Senotherapeutics/pharmacology ; Dasatinib/pharmacology ; Sirolimus/pharmacology ; Flavonoids/pharmacology ; Bacteria/drug effects/genetics ; Adult ; Male ; Flavonols/pharmacology ; Female ; Middle Aged ; Aging/drug effects ; }, abstract = {Biological ageing is a time-dependent process that has implications for health and disease. Cellular senescence is a key driver in ageing and age-related diseases. Senotherapeutic agents have been shown to slow biological ageing by eliminating senescent mammalian cells. Given the increasing awareness of the gut microbiome in regulating human health, this study aimed to investigate the effects of senotherapeutic agents as pharmacological interventions on the human gut microbiota. In this study, the bidirectional effects of four senotherapeutic agents, quercetin, fisetin, dasatinib, and sirolimus, with the gut microbiota sourced from healthy human donors were investigated. The results revealed that quercetin was completely biotransformed by the gut microbiota within six hours, while dasatinib was the most stable of the four compounds. Additionally, metagenomic analysis confirmed that all four compounds increased the abundance of bacterial species associated with healthy ageing (e.g., Bacteroides fragilis, Bifidobacterium longum, and Veillonella parvula), and decreased the abundance of pathogenic bacteria primarily associated with age-related diseases (e.g., Enterococcus faecalis and Streptococcus spp.). The findings from this study provide a comprehensive understanding of the pharmacobiomics of senotherapeutic interventions, highlighting the potential of microbiome-targeted senolytics in promoting healthy ageing.}, }
@article {pmid40215877, year = {2025}, author = {Saeed, M and Al-Khalaifah, H and Al-Nasser, A and Al-Surrayai, T}, title = {Feeding the future: A new potential nutritional impact of Lactiplantibacillus plantarum and its promising interventions in future for poultry industry.}, journal = {Poultry science}, volume = {104}, number = {6}, pages = {105130}, pmid = {40215877}, issn = {1525-3171}, mesh = {Animals ; *Probiotics/administration &amp; dosage ; *Chickens/physiology/growth &amp; development ; Animal Feed/analysis ; Diet/veterinary ; *Gastrointestinal Microbiome/drug effects ; Animal Nutritional Physiological Phenomena ; *Lactobacillus plantarum/chemistry ; *Animal Husbandry/methods ; }, abstract = {The increasing demand for sustainable and efficient chicken production has intensified the interest in functional feed additives such as probiotics. Lactiplantibacillus plantarum (formerly known as Lactobacillus plantarum) is an important probiotic bacterium that has become an essential component in poultry nutrition owing to its diverse advantages. This bacterium improves gut health by regulating the intestinal microbiota, increasing food absorption, and strengthening the immune system. It also alleviates the detrimental impacts of pathogenic bacteria, thereby reducing the reliance on antibiotics and promoting antibiotic-free poultry production. Additionally, Lactobacillus plantarum enhances growth performance, feed conversion efficiency, and total flock productivity. Adding Lactobacillus plantarum to chicken feed helps the gut microbiota by encouraging good bacterial communities (e.g., Eubacterium, Faecalibacterium, Ligilactobacillus, Limosilactobacillus, Blautia and Clostridium). This leads to increased growth in chickens and helps maintain the balance of their gut flora. Lactobacillus plantarum has been extensively investigated as a potential feed additive to replace in-feed antibiotics. Published literature have revealed that a dietary additive of Lactobacillus plantarum improved the health and growth of broilers by improving the balance of bacteria and the metabolism of nutrients in the gut. This study explores the incorporation of Lactobacillus plantarum into poultry diets and its importance in sustainable and healthy poultry production. This study will encourage poultry scientists to investigate further before encapsulation. Innovations in Lactiplantibacillus plantarum, including its intestine colonization methods and novel strategies to improve its colonization, have the potential to transform the industry. Rapid development of tools and techniques (microencapsulated, nanotechnology, metagenomics, and transcriptome for L. plantarum) could help cover research and application shortages.}, }
@article {pmid40214404, year = {2025}, author = {Nilsen, T and Pettersen, R and Keeley, NB and Ray, JL and Majaneva, S and Stokkan, M and Hervik, A and Angell, IL and Snipen, LG and Sundt, M&#xd8; and Rudi, K}, title = {Association of Microbial Networks with the Coastal Seafloor Macrofauna Ecological State.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {15}, pages = {7517-7529}, pmid = {40214404}, issn = {1520-5851}, mesh = {Animals ; Aquaculture ; Archaea ; Ecosystem ; Iceland ; *Microbiota ; Norway ; *Aquatic Organisms/microbiology ; }, abstract = {Recent evidence suggests that there is a major switch in coastal seafloor microbial ecology already at a mildly deteriorated macrofaunal state. This knowledge is of critical value in the management and conservation of the coastal seafloor. We therefore aimed to determine the relationships between seafloor microbiota and macrofauna on a regional scale. We compared prokaryote, macrofauna, chemical, and geographical data from 1546 seafloor samples, which varied in their exposure to aquaculture activities along the Norwegian and Icelandic coasts. We found that the seafloor samples contained either a network centralized by a sulfur oxidizer (42.4% of samples, n = 656) or a network centralized by an archaeal ammonium oxidizer (44.0% of samples, n = 681). Very few samples contained neither network (9.8% of samples, n = 151) or both (3.8% of samples, n = 58). Samples with a sulfur oxidizer network had a 10-fold higher risk of macrofauna loss (odds ratios, 95% CI: 9.5 to 15.6), while those with an ammonium oxidizer network had a 10-fold lower risk (95% CI: 0.068 to 0.11). The sulfur oxidizer network was negatively correlated to distance from Norwegian aquaculture sites (Spearman rho = -0.42, p < 0.01) and was present in all Icelandic samples (n = 274). The ammonium oxidizer network was absent from Icelandic samples and positively correlated to distance from Norwegian aquaculture sites (Spearman rho = 0.67, p < 0.01). Based on 356 high-quality metagenome-assembled genomes (MAGs), we found that bicarbonate-dependent carbon fixation and low-affinity oxygen respiration were associated with the ammonium oxidizer network, while the sulfur oxidizer network was associated with ammonium retention, sulfur metabolism, and high-affinity oxygen respiration. In conclusion, our findings highlight the critical roles of microbial networks centralized by sulfur and ammonium oxidizers in mild macrofauna deterioration, which should be included as an essential part of seafloor surveillance.}, }
@article {pmid40212922, year = {2025}, author = {Wang, C and Li, C and You, F and Zhou, Y and Tu, G and Liu, R and Yi, P and Wu, X and Nie, H}, title = {Multi-Omics Analysis of Gut Microbiome and Host Metabolism in Different Populations of Chinese Alligators (alligator sinensis) During Various Reintroduction Phases.}, journal = {Ecology and evolution}, volume = {15}, number = {4}, pages = {e71221}, pmid = {40212922}, issn = {2045-7758}, abstract = {Reintroduction plays a significant role in the self-maintenance and reconstruction of wild animal populations, serving as a communication bridge between captive and wild animals. The Chinese alligator (Alligator sinensis) is a distinct and endangered reptile species found in China. The mechanisms by which artificially bred Chinese alligators adapt following their release into the wild remain poorly understood. This study aims to elucidate the alterations in gut microbiomes and metabolic phenotypes of Chinese alligators during their reintroduction. During the Chinese alligator's reintroduction, Fusobacterium and Cetobacterium became more abundant, while typical pathogens declined significantly. The gut type of the Chinese alligator changed from Acinetobacter to Cetobacterium. The construction of the gut microbial community was dominated by neutral (random) processes and shifted towards deterministic processes with the progression of reintroduction. In terms of species function, reintroduction significantly upregulated the expression of host immune-related genes and significantly decreased the expression of gut bacterial pathogenic genes and antibiotic resistance genes. Metagenomic and metabolomic KEGG enrichment analyses indicate that glucoside hydrolase families 13 and 23-alongside glycolysis and gluconeogenesis pathways-may play pivotal roles in energy metabolism, host-pathogen interactions, and homeostasis maintenance for Chinese alligators. Differential metabolite analysis identified significant upregulation of metabolites related to neuroendocrine immune modulation and significant down-regulation of anti-inflammatory metabolites during Chinese alligator reintroduction. Association analysis showed that there were significant co-metabolic effects between microorganisms and metabolites, which coordinated host adaptive interaction. This study provides insights into the synergistic mechanisms of host adaptation and wild environment adaptation for Chinese alligators.}, }
@article {pmid40211688, year = {2025}, author = {Ge, SX and Niu, YM and Ren, LL and Zong, SX}, title = {Inheritance or Recruitment? The Assembly Mechanisms and Functional Dynamics of Microbial Communities in the Life Cycle of a Wood-Feeding Beetle.}, journal = {Molecular ecology}, volume = {34}, number = {9}, pages = {e17751}, doi = {10.1111/mec.17751}, pmid = {40211688}, issn = {1365-294X}, support = {2021YFD1400900//National Key R&amp;D Program of China/ ; }, mesh = {Animals ; *Coleoptera/microbiology/genetics/growth &amp; development ; *Microbiota/genetics ; Larva/microbiology ; Bacteria/genetics/classification ; Gastrointestinal Microbiome/genetics ; Wood ; Life Cycle Stages ; Fungi/genetics/classification ; }, abstract = {Microbial partners enhance the metabolic capabilities of insects, enabling their adaptation to diverse ecological niches. Xylophagous insects have larvae that can digest lignocellulose and cope with plant secondary metabolites (PSMs). However, there is little information in terms of microbiome sources, dynamics and species contributions. This limits our understanding of the interaction between xylophagous insects and the microbiome. Monochamus saltuarius (Cerambycidae) is a significant borer of conifers. We used combined qPCR, host genomic and microbiome metagenomic datasets, as well as in vitro validation experiments to study the dynamics of the associated microbiome and its interactions with M. saltuarius. We evaluated microbial metabolic/biosynthetic contributions and validated their related functions. Our findings revealed that insect growth and development altered the quantity and community composition of associated bacteria and fungi. The egg microbiome was particularly susceptible to alteration due to oviposition pits. Bacterial transmission largely persisted between developmental stages, while fungal re-acquisition primarily originated from the external environment. By reconstructing community pathway maps, we identified the cooperative interactions between the insect and its gut microbiome. As larvae transitioned from phloem to xylem feeding, the functional role of the gut microbiome in various pathways was weakened. Remarkably, high-contribution bacterial species largely overlapped across different functional roles, and these species also showed considerable overlap between phloem and xylem feeding periods. Overall, our study highlights the unique interaction between xylophagous insects and their microbiome, which enhances their ability in lignocellulose digestion, PSMs degradation and the acquisition of essential amino acids, as well as vitamins.}, }
@article {pmid40211121, year = {2025}, author = {Polizel, GHG and Diniz, WJS and Cesar, ASM and Ramírez-Zamudio, GD and Cánovas, A and Dias, EFF and Fernandes, AC and Prati, BCT and Furlan, &#xc9; and Pombo, GDV and Santana, MHA}, title = {Impacts of prenatal nutrition on metabolic pathways in beef cattle: an integrative approach using metabolomics and metagenomics.}, journal = {BMC genomics}, volume = {26}, number = {1}, pages = {359}, pmid = {40211121}, issn = {1471-2164}, support = {2021/03265-1//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de S&#xe3;o Paulo/ ; 2017/12105-2//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de S&#xe3;o Paulo/ ; 307593/2021-5//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico/ ; 001//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior/ ; }, mesh = {Animals ; Cattle ; Female ; *Metabolomics/methods ; Pregnancy ; *Metabolic Networks and Pathways ; *Metagenomics/methods ; Male ; Metabolome ; Rumen/microbiology ; Microbiota ; *Prenatal Nutritional Physiological Phenomena ; *Animal Nutritional Physiological Phenomena ; Gastrointestinal Microbiome ; }, abstract = {BACKGROUND: This study assessed the long-term metabolic effects of prenatal nutrition in Nelore bulls through an integrated analysis of metabolome and microbiome data to elucidate the interconnected host-microbe metabolic pathways. To this end, a total of 126 cows were assigned to three supplementation strategies during pregnancy: NP (control)- only mineral supplementation; PP- protein-energy supplementation during the last trimester; and FP- protein-energy supplementation throughout pregnancy. At the end of the finishing phase, blood, fecal, and ruminal fluid samples were collected from 63 male offspring. The plasma underwent targeted metabolomics analysis, and fecal and ruminal fluid samples were used to perform 16 S rRNA gene sequencing. Metabolite and ASV (amplicon sequence variant) co-abundance networks were constructed for each treatment using the weighted gene correlation network analysis (WGCNA) framework. Significant modules (p ≤ 0.1) were selected for over-representation analyses to assess the metabolic pathways underlying the metabolome (MetaboAnalyst 6.0) and the microbiome (MicrobiomeProfiler). To explore the metabolome-metagenome interplay, correlation analyses between host metabolome and microbiome were performed. Additionally, a holistic integration of metabolic pathways was performed (MicrobiomeAnalyst 2.0).<br><br>RESULTS: A total of one and two metabolite modules associated with the NP and FP were identified, respectively. Regarding fecal microbiome, three, one, and two modules for the NP, PP, and FP were identified, respectively. The rumen microbiome demonstrated two modules correlated with each of the groups under study. Metabolite and microbiome enrichment analyses revealed the main metabolic pathways associated with lipid and protein metabolism, and regulatory mechanisms. The correlation analyses performed between the host metabolome and fecal ASVs revealed 13 and 12 significant correlations for NP and FP, respectively. Regarding the rumen, 16 and 17 significant correlations were found for NP and FP, respectively. The NP holistic analysis was mainly associated with amino acid and methane metabolism. Glycerophospholipid and polyunsaturated fatty acid metabolism were over-represented in the FP group.<br><br>CONCLUSIONS: Prenatal nutrition significantly affected the plasma metabolome, fecal microbiome, and ruminal fluid microbiome of Nelore bulls, providing insights into key pathways in protein, lipid, and methane metabolism. These findings offer novel discoveries about the molecular mechanisms underlying the effects of prenatal nutrition.<br><br>CLINICAL TRIAL NUMBER: Not applicable.}, }
@article {pmid40210868, year = {2025}, author = {Fu, Y and Guzior, DV and Okros, M and Bridges, C and Rosset, SL and González, CT and Martin, C and Karunarathne, H and Watson, VE and Quinn, RA}, title = {Balance between bile acid conjugation and hydrolysis activity can alter outcomes of gut inflammation.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {3434}, pmid = {40210868}, issn = {2041-1723}, support = {R01 DK140854/DK/NIDDK NIH HHS/United States ; 1R01DK140854//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; }, mesh = {Animals ; *Bile Acids and Salts/metabolism ; Humans ; Gastrointestinal Microbiome/genetics ; Mice, Knockout ; Mice ; Amidohydrolases/metabolism/genetics ; Hydrolysis ; Acyltransferases/genetics/metabolism ; Taurocholic Acid/pharmacology/metabolism ; Disease Models, Animal ; *Colitis/metabolism/pathology/microbiology ; Male ; Inflammatory Bowel Diseases/metabolism/microbiology ; Female ; Mice, Inbred C57BL ; Clostridiales/metabolism/genetics ; Crohn Disease/metabolism/microbiology/genetics ; }, abstract = {Conjugated bile acids (BAs) are multi-functional detergents in the gastrointestinal (GI) tract produced by the liver enzyme bile acid-CoA:amino acid N-acyltransferase (BAAT) and by the microbiome from the acyltransferase activity of bile salt hydrolase (BSH). Humans with inflammatory bowel disease (IBD) have an enrichment in both host and microbially conjugated BAs (MCBAs), but their impacts on GI inflammation are not well understood. We investigated the role of host-conjugated BAs in a mouse model of colitis using a BAAT knockout background. Baat[-/-] KO mice have severe phenotypes in the colitis model that were rescued by supplementation with taurocholate (TCA). Gene expression and histology showed that this rescue was due to an improved epithelial barrier integrity and goblet cell function. However, metabolomics also showed that TCA supplementation resulted in extensive metabolism to secondary BAs. We therefore investigated the BSH activity of diverse gut bacteria on a panel of conjugated BAs and found broad hydrolytic capacity depending on the bacterium and the amino acid conjugate. The complexity of this microbial BA hydrolysis led to the exploration of bsh genes in metagenomic data from human IBD patients. Certain bsh sequences were enriched in people with Crohn's disease particularly that from Ruminococcus gnavus. This study shows that both host and microbially conjugated BAs may provide benefits to those with IBD, but this is dictated by a delicate balance between BA conjugation/deconjugation based on the bsh genes present.}, }
@article {pmid40210629, year = {2025}, author = {Park, JW and Yun, YE and Cho, JA and Yoon, SI and In, SA and Park, EJ and Kim, MS}, title = {Characterization of the phyllosphere virome of fresh vegetables and potential transfer to the human gut.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {3427}, pmid = {40210629}, issn = {2041-1723}, support = {2020R1A5A8017671//National Research Foundation of Korea (NRF)/ ; 2019R1C1C1009664//National Research Foundation of Korea (NRF)/ ; 2018R1D1A3B07050366//National Research Foundation of Korea (NRF)/ ; 2021R1F1A1064222//National Research Foundation of Korea (NRF)/ ; }, mesh = {Humans ; *Virome/genetics ; *Vegetables/virology ; *Gastrointestinal Microbiome/genetics ; Feces/virology ; *Plant Leaves/virology ; Metagenome ; Bacteriophages/genetics/classification/isolation &amp; purification ; Phylogeny ; Metagenomics ; }, abstract = {Fresh vegetables harbor diverse microorganisms on leaf surfaces, yet their viral communities remain unexplored. We investigate the diversity and ecology of phyllosphere viromes of six leafy green vegetables using virus-like particle (VLP) enrichment and shotgun metagenome sequencing. On average, 9.2 × 10[7] viruses are present per gram of leaf tissue. The majority (93.1 ± 6.2%) of these viruses are taxonomically unclassified. Virome compositions are distinct among vegetable types and exhibit temporal variations. Virulent phages with replication-enhancing auxiliary metabolic genes (AMGs) are more dominant than temperate phages with host fitness-benefiting AMGs. Analysis of 1498 human fecal VLP metagenomes reveals that approximately 10% of vegetable viruses are present in the human gut virome, including viruses commonly observed in multiple studies. These gut-associated vegetable viruses are enriched with short-term vegetable intake, and depleted in individuals with metabolic and immunologic disorders. Overall, this study elucidates the ecological contribution of the fresh vegetable virome to human gut virome diversity.}, }
@article {pmid40210439, year = {2025}, author = {Smith, BJ and Zhao, C and Dubinkina, V and Jin, X and Zahavi, L and Shoer, S and Moltzau-Anderson, J and Segal, E and Pollard, KS}, title = {Accurate estimation of intraspecific microbial gene content variation in metagenomic data with MIDAS v3 and StrainPGC.}, journal = {Genome research}, volume = {35}, number = {5}, pages = {1247-1260}, pmid = {40210439}, issn = {1549-5469}, support = {R01 HL160862/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; *Metagenomics/methods ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; *Genetic Variation ; *Bacteria/genetics/classification ; }, abstract = {Metagenomics has greatly expanded our understanding of the human gut microbiome by revealing a vast diversity of bacterial species within and across individuals. Even within a single species, different strains can have highly divergent gene content, affecting traits such as antibiotic resistance, metabolism, and virulence. Methods that harness metagenomic data to resolve strain-level differences in functional potential are crucial for understanding the causes and consequences of this intraspecific diversity. The enormous size of pangenome references, strain mixing within samples, and inconsistent sequencing depth present challenges for existing tools that analyze samples one at a time. To address this gap, we updated the MIDAS pangenome profiler, now released as version 3, and developed StrainPGC, an approach to strain-specific gene content estimation that combines strain tracking and correlations across multiple samples. We validate our integrated analysis using a complex synthetic community of strains from the human gut and find that StrainPGC outperforms existing approaches. Analyzing a large, publicly available metagenome collection from inflammatory bowel disease patients and healthy controls, we catalog the functional repertoires of thousands of strains across hundreds of species, capturing extensive diversity missing from reference databases. Finally, we apply StrainPGC to metagenomes from a clinical trial of fecal microbiota transplantation for the treatment of ulcerative colitis. We identify two Escherichia coli strains, from two different donors, that are both frequently transmitted to patients but have notable differences in functional potential. StrainPGC and MIDAS v3 together enable precise, intraspecific pangenomic investigations using large collections of metagenomic data without microbial isolation or de novo assembly.}, }
@article {pmid40210403, year = {2025}, author = {Africa, AJ and Setati, ME and Hitzeroth, AC and Blancquaert, EH}, title = {Exploring the evolution of microbial communities from the phyllosphere and carposphere to the grape must of Vitis vinifera L. cv's Chardonnay and Pinot noir.}, journal = {Food microbiology}, volume = {130}, number = {}, pages = {104780}, doi = {10.1016/j.fm.2025.104780}, pmid = {40210403}, issn = {1095-9998}, mesh = {*Vitis/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Microbiota ; *Fungi/classification/genetics/isolation &amp; purification ; *Plant Leaves/microbiology ; *Fruit/microbiology ; Wine/microbiology/analysis ; South Africa ; }, abstract = {Microbial communities associated with the grapevine phyllosphere and carposhere are a fundamental determinant of grape and wine quality. High throughput amplicon sequencing was used to profile the fungal and bacterial communities on the associated phylloplane and carposphere of Vitis vinifera L. cv's Chardonnay and Pinot noir in the Elgin and Hemel-en-Aarde wine districts of South Africa in the 2021-2022 growing season. The subsequent grape must was analysed to determine the prevalent microbiome. The most abundant bacterial and fungal genera found in both the phylloplane and carposphere of Chardonnay and Pinot noir were Pseudomonas and Filobasidium. The LEfSe (Linear discriminant analysis Effect Size) revealed significant differences in fungal and bacterial biomarkers from leaf, berry and grape must samples; however, no biomarkers were identified for cultivar nor location. Fungal β-diversity was significantly similar at different phenological stages, whereas bacterial β-diversity was significantly similar regardless of the site of colonisation. However, skin integrity of the grapes was may have influenced the microbial diversity.}, }
@article {pmid40210162, year = {2025}, author = {Gao, X and Yuan, S and Li, X and Xing, W}, title = {Non-synergistic effects of microplastics and submerged macrophytes on sediment microorganisms involved in carbon and nitrogen cycling.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {374}, number = {}, pages = {126213}, doi = {10.1016/j.envpol.2025.126213}, pmid = {40210162}, issn = {1873-6424}, mesh = {*Geologic Sediments/microbiology ; *Nitrogen Cycle ; *Microplastics/toxicity ; *Water Pollutants, Chemical ; *Carbon Cycle ; Carbon/metabolism ; Nitrogen/metabolism ; Microbiota ; }, abstract = {Submerged macrophyte communities play a crucial role in regulating sediment carbon and nitrogen cycling in lake ecosystems. However, their interactions with emerging pollutants such as polystyrene microplastics (PS-MPs) remain poorly understood. In this study, we employed metagenomic analysis to examine the combined effects of submerged macrophyte communities and PS-MPs on sediment microbial communities, focusing on microbial populations, functional genes, and metabolic pathways involved in carbon and nitrogen cycling. Our results revealed a non-synergistic interaction between macrophyte communities and PS-MPs in shaping sediment biogeochemical processes. While increasing PS-MPs concentrations (from 0.5 to 2.5 % w/w) significantly enhanced microbial diversity (species richness increased from 533 to 1301), the presence of macrophytes moderated this response. Notably, we observed differential selective pressures on functional genes involved in key carbon and nitrogen cycling steps, particularly amoAB and amoC, nirS, and nirK, indicating distinct shifts in microbial functional groups. Furthermore, we identified complex substrate-pathway interactions: nitrate and ammonium differentially influenced fermentation and methanogenesis, while inorganic carbon positively regulated nitrate dissimilatory reduction. These findings provide novel insights into the regulatory mechanisms of submerged macrophytes in sediment biogeochemical cycling under microplastic stress, highlighting their potential role in maintaining ecosystem functions in contaminated aquatic environments.}, }
@article {pmid40209677, year = {2025}, author = {Lin, Y and Lau, HC and Liu, C and Ding, X and Sun, Y and Rong, J and Zhang, X and Wang, L and Yuan, K and Miao, Y and Wu, WK and Wong, SH and Sung, JJ and Yu, J}, title = {Multi-cohort analysis reveals colorectal cancer tumor location-associated fecal microbiota and their clinical impact.}, journal = {Cell host &amp; microbe}, volume = {33}, number = {4}, pages = {589-601.e3}, doi = {10.1016/j.chom.2025.03.012}, pmid = {40209677}, issn = {1934-6069}, mesh = {Humans ; *Feces/microbiology ; *Colorectal Neoplasms/microbiology/pathology/diagnosis ; *Gastrointestinal Microbiome ; Cohort Studies ; Metagenome ; Male ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Middle Aged ; Aged ; Fusobacterium nucleatum/isolation &amp; purification ; Biomarkers, Tumor ; ROC Curve ; }, abstract = {Microbial alterations in different tumor locations of colorectal cancer (CRC) remain unclear. Here, 1,375 fecal metagenomes from six in-house and published datasets were analyzed, including 128 right-sided CRC (rCRC), 168 left-sided CRC (lCRC), 250 rectal cancer (RC), and 829 controls. Firmicutes progressively increase from rCRC, lCRC, to RC, in contrast to the gradual decrease of Bacteroidetes. Tumor location-associated fecal microbes are identified, including Veillonella parvula for rCRC, Streptococcus angionosus for lCRC, and Peptostreptococcus anaerobius for RC, while Fusobacterium nucleatum is enriched in all tumor locations. Tumor location-associated bacteria correlate with patient survival. Clinically, we establish a microbial biomarker panel for each tumor location that accurately diagnoses rCRC (area under the receiver operating characteristic curve [AUC] = 91.59%), lCRC (AUC = 91.69%), or RC (AUC = 90.53%) from controls. Tumor location-specific biomarkers also have higher diagnostic accuracy (AUC = 91.38%) than location-non-specific biomarkers (AUC = 82.92%). Overall, we characterize fecal microbes associated with different CRC tumor locations, highlighting that tumor location should be considered in non-invasive diagnosis.}, }
@article {pmid40209382, year = {2025}, author = {Su, C and Kang, J and Liu, S and Li, C}, title = {Exploring the influence of fruit ripeness on the microbiome, bioactive components, and flavor profiles of naturally fermented noni (Morinda citrifolia L.) juice.}, journal = {Food chemistry}, volume = {482}, number = {}, pages = {144192}, doi = {10.1016/j.foodchem.2025.144192}, pmid = {40209382}, issn = {1873-7072}, mesh = {*Morinda/microbiology/chemistry/growth &amp; development/metabolism ; *Fruit/microbiology/chemistry/growth &amp; development/metabolism ; *Fruit and Vegetable Juices/analysis/microbiology ; *Microbiota ; Fermentation ; *Flavoring Agents/metabolism/chemistry ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Volatile Organic Compounds/metabolism/chemistry ; Taste ; }, abstract = {Raw fruit ripeness is an important factor affecting fermented noni fruit juice (FNJ). This study investigated the physicochemical properties, active and volatile components, microbiota, and functional characteristics of FNJ prepared from noni fruits at varying ripening stages. The results showed that deacetylasperulosidic acid (203.54-805.89 mg/L) and asperulosidic acid (102.78-393.41 mg/L) were detected across in all FNJs during fermentation. As noni fruit ripens, the levels of octanoic acid and hexanoic acid in FNJs gradually decreased, while the content of esters significantly increased, particularly during the final stage of ripeness. Metagenomic analysis revealed that Acetobacter sp. and Gluconobacter sp. were core microbes responsible for FNJs, primarily contributing to fatty acid metabolism. Correlation analysis further indicated that the fruit's ripeness significantly influenced its functional properties and volatile components of FNJs. This study offered new insights into selecting the optimal ripeness of noni fruits for the preparation of FNJ and its potential industrial applications.}, }
@article {pmid40209373, year = {2025}, author = {Wang, L and Pei, H and Xing, T and Chen, D and Chen, Y and Hao, Z and Tian, Y and Ding, J}, title = {Gut bacteria and host metabolism: The keys to sea cucumber (Apostichopus japonicus) quality traits.}, journal = {Food chemistry}, volume = {482}, number = {}, pages = {144178}, doi = {10.1016/j.foodchem.2025.144178}, pmid = {40209373}, issn = {1873-7072}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Stichopus/metabolism/microbiology/chemistry ; *Sea Cucumbers/metabolism/microbiology ; Polysaccharides/metabolism/analysis ; Collagen/metabolism ; }, abstract = {Gut bacteria have a significant impact on modern genetics and contribute to the improvement of aquatic germplasm, which is a key focus for breeders. However, the effects of complex interactions between gut bacteria community and phenotypic trait of aquatic products remain largely unknown. Here, we unravel the association between phenotypic trait, gut microbiota and host metabolic variables of 216 sea cucumbers (Apostichopus japonicus) by Metagenome-wide association studies (MWAS) and Weighted correlation network analysis (WGCNA) methods. Our findings reveal that a total of 14 microbial biomarkers and 201 metabolic markers considered being associated with polysaccharide and collagen content. Among them, Desulfobacterota has the capacity to facilitate the synthesis of octopamine within the neuroactive ligand-receptor metabolic pathway, subsequently influencing polysaccharide content. Additionally, the Lachnospiraceae_NK4A136_group was shown to enhance collagen content through the facilitation of glycine synthesis. In conclusion, this research indicating that precision microbiome management could be a strategy for develop strategies for cultivating high-quality aquatic germplasm.}, }
@article {pmid40207938, year = {2025}, author = {Zhao, D and Salas-Leiva, DE and Williams, SK and Dunn, KA and Shao, JD and Roger, AJ}, title = {Eukfinder: a pipeline to retrieve microbial eukaryote genome sequences from metagenomic data.}, journal = {mBio}, volume = {16}, number = {5}, pages = {e0069925}, pmid = {40207938}, issn = {2150-7511}, support = {FRN-142349//Canadian Government | Canadian Institutes of Health Research (CIHR)/ ; }, mesh = {*Metagenomics/methods ; Humans ; *Eukaryota/genetics ; *Computational Biology/methods ; *Blastocystis/genetics ; Gastrointestinal Microbiome/genetics ; Metagenome ; Whole Genome Sequencing ; Software ; }, abstract = {UNLABELLED: Whole-genome shotgun (WGS) metagenomic sequencing of microbial communities enables the discovery of the functions, physiologies, and evolutionary histories of prokaryotic and eukaryotic microbes. However, metagenomic studies of microbial eukaryotes lag due to challenges in identifying and assembling high-quality genomes from WGS data. To address this problem, we developed Eukfinder, a bioinformatics pipeline that identifies potential eukaryotic sequences from WGS metagenomic data, with a complementary binning workflow for recovering nuclear and mitochondrial genomes. Eukfinder uses two specialized databases for read/contig classification, customizable to specific data sets or environments. We tested Eukfinder on simulated gut microbiome data sets which included varying numbers of reads from the protist Blastocystis, a human gut commensal. We also applied Eukfinder to previously published human gut microbiome WGS metagenomic data to recover new genomes of Blastocystis. Compared to other workflows, Eukfinder offers the potential to recover high-quality, near-complete genomes of diverse eukaryotes, including different Blastocystis subtypes, without relying on a reference genome. With sufficient sequencing depth, Eukfinder outperforms similar tools for recovering eukaryotic genomes from metagenomic data. Eukfinder is a valuable tool for reference-independent and cultivation-free studies of eukaryotic microbial genomes from environmental WGS metagenomic samples.<br><br>IMPORTANCE: Advancements in next-generation sequencing have made whole-genome shotgun (WGS) metagenomic sequencing an efficient method for de novo reconstruction of microbial genomes from various environments. Thousands of new prokaryotic genomes have been characterized; however, the large size and complexity of protistan genomes have hindered the use of WGS metagenomics to sample microbial eukaryotic diversity. Eukfinder enables the recovery of eukaryotic microbial genomes from environmental WGS metagenomic samples. Retrieval of high-quality protistan genomes from diverse metagenomic samples increases the number of reference genomes available. This aids future metagenomic investigations into the functions, physiologies, and evolutionary histories of eukaryotic microbes in the gut microbiome and other ecosystems.}, }
@article {pmid40207877, year = {2025}, author = {Huang, L and Chen, C and Meng, J and Yan, Q and Luo, G and Sha, S and Xing, Y and Liu, C and Xu, M and Zhao, L and Guo, S and Wu, X and Chen, H and Ma, J and You, W and Zhang, Y and Guo, R and Li, S and Yao, X and Ma, W and Kong, X and Zhou, P and Sun, W}, title = {Metagenome-Based Characterization of the Gut Virome Signatures in Patients With Gout.}, journal = {Journal of medical virology}, volume = {97}, number = {4}, pages = {e70336}, doi = {10.1002/jmv.70336}, pmid = {40207877}, issn = {1096-9071}, support = {//This study was supported by 2024 High-quality Development Project of Shenzhen Bao'an Public Hospital (BAGZL2024138 and BAGZL2024130), National Natural Science Foundation of China (82370563), Dalian Medical University Interdisciplinary Research Cooperation Project Team Funding (JCH22023017), the Key Laboratory of Guizhou Provincial Education Department (Guizhou Education Technology [2023] No. 017), National and Provincial Science and Technology Innovation Talent Team Cultivation Program of Guizhou University of Traditional Chinese Medicine (GZUTCM-TD[2022]004)./ ; }, mesh = {Humans ; *Virome ; *Gastrointestinal Microbiome ; *Gout/virology ; Male ; Middle Aged ; Feces/virology ; Female ; *Metagenome ; Metagenomics ; *Viruses/classification/genetics/isolation &amp; purification ; Adult ; Aged ; Longitudinal Studies ; }, abstract = {The gut microbiome has been implicated in the development of autoimmune diseases, including gout. However, the role of the gut virome in gout pathogenesis remains underexplored. We employed a reference-dependent virome approach to analyze fecal metagenomic data from 102 gout patients (77 in the discovery cohort and 25 in the validation cohort) and 86 healthy controls (HCs) (63 and 23 in each cohort). A subset of gout patients in the discovery cohort provided longitudinal samples at Weeks 2, 4, and 24. Our analysis revealed significant alterations in the gut virome of gout patients, including reduced viral richness and shifts in viral family composition. Notably, Siphoviridae, Myoviridae, and Podoviridae were depleted, while Quimbyviridae, Retroviridae, and Schitoviridae were enriched in gout patients. We identified 359 viral operational taxonomic units (vOTUs) associated with gout. Enriched vOTUs in gout patients predominantly consisted of Fusobacteriaceae, Bacteroidaceae, and Selenomonadaceae phages, while control-enriched vOTUs included Ruminococcaceae, Oscillospiraceae, and Enterobacteriaceae phages. Longitudinal analysis revealed that a substantial proportion of these virome signatures remained stable over 6 months. Functional profiling highlighted the enrichment of viral auxiliary metabolic genes, suggesting potential metabolic interactions between viruses and host bacteria. Notably, gut virome signatures effectively discriminated gout patients from HCs, with high classification performance in the validation cohort. This study provides the first comprehensive characterization of the gut virome in gout, revealing its potential role in disease pathogenesis and highlighting virome-based signatures as promising biomarkers for gout diagnosis and future therapeutic strategies.}, }
@article {pmid40207161, year = {2025}, author = {Helmi, NR}, title = {Exploring the diversity and antimicrobial potential of actinomycetes isolated from different environments in Saudi Arabia: a systematic review.}, journal = {Frontiers in microbiology}, volume = {16}, number = {}, pages = {1568899}, pmid = {40207161}, issn = {1664-302X}, abstract = {The increasing prevalence of antimicrobial resistance (AMR) presents a significant global health challenge, underscoring the urgent need for novel antimicrobial agents. Actinomycetes, particularly Streptomyces species, are well known for synthesizing bioactive compounds with antibacterial, antifungal, and antiviral properties. This review explores the diversity and antimicrobial potential of actinomycetes from Saudi Arabia's unique ecosystems, including terrestrial (soil, rhizosphere), aquatic (marine, freshwater), extreme (deserts, caves, hot springs, mountains, and mangroves), and other unique environments. The adaptation of these microorganisms to harsh environmental conditions has driven the evolution of unique strains with enhanced biosynthetic capacities. Several studies have demonstrated their antimicrobial efficacy against multidrug-resistant pathogens, including methicillin-resistant Staphylococcus aureus (MRSA), extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae, Pseudomonas aeruginosa, and Candida albicans. However, challenges in actinomycete research persist, including difficulties in culturing rare strains, limited genomic characterization, and high production costs. Recent advancements, such as genome mining, metagenomics, AI-driven bioinformatics, and CRISPR-based gene activation, offer promising avenues for unlocking novel antimicrobial compounds. Additionally, synthetic biology, advanced fermentation technologies, and nanotechnology-based drug delivery systems are enhancing the industrial scalability of actinomycete-derived antibiotics. Beyond antimicrobials, actinomycete-derived compounds show potential applications in oncology, immunotherapy, and agriculture. Alternative therapeutic strategies, including quorum sensing inhibitors, phage therapy, and combination therapies, are being explored to combat AMR. Cutting-edge analytical techniques, such as mass spectrometry, liquid chromatography, and nuclear magnetic resonance spectroscopy (NMR), are essential for structural elucidation and mechanism characterization of new bioactive compounds. To harness Saudi Arabia's microbial biodiversity effectively, interdisciplinary collaborations between microbiologists, biotechnologists, and pharmaceutical industries are crucial. Sustainable bioprospecting and advanced bioprocessing strategies will facilitate the translation of actinomycete-derived bioactive compounds into clinically viable therapeutics. Expanding research efforts into underexplored Saudi ecosystems can lead to groundbreaking discoveries in antibiotic development and beyond.}, }
@article {pmid40205678, year = {2025}, author = {He, Y and Zhao, G and Ouyang, X and Wang, S and Chen, Y and Li, C and He, Y and Gao, J and Han, S and Zhao, J and Wang, J and Wang, C}, title = {Creatine-mediated ferroptosis inhibition is involved in the intestinal radioprotection of daytime-restricted feeding.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2489072}, pmid = {40205678}, issn = {1949-0984}, mesh = {Animals ; Mice ; Gastrointestinal Microbiome/drug effects/radiation effects ; *Creatine/metabolism/pharmacology/administration &amp; dosage ; *Ferroptosis/drug effects/radiation effects ; Mice, Inbred C57BL ; Male ; *Intestines/radiation effects/microbiology ; *Radiation-Protective Agents/metabolism/administration &amp; dosage ; Radiation, Ionizing ; Feces/microbiology ; Enterocytes/radiation effects/metabolism ; }, abstract = {Ionizing radiation-induced intestinal injury (IRIII) is a catastrophic disease lack of sufficient medical countermeasures currently. Regulation of the gut microbiota through dietary adjustments is a potential strategy to mitigate IRIII. Time-restricted feeding (TRF) is an emerging behavioral nutrition intervention with pleiotropic health benefits. Whether this dietary pattern influences the pathogenesis of IRIII remains vague. We evaluated the impact of TRF on intestinal radiosensitivity in this study and discovered that only daytime TRF (DTRF), not nighttime TRF, could ameliorate intestinal damage in mice that received a high dose of IR. Faecal metagenomic and metabolomic studies revealed that the intestinal creatine level was increased by approximate 9 times by DTRF, to which the Bifidobacterium pseudolongum enrichment contribute. Further investigations showed that creatine could activate the energy sensor AMP-activated protein kinase in irradiated enterocytes and induce phosphorylation of acetyl-CoA carboxylase, resulting in reduced production of polyunsaturated fatty acids and reduced ferroptosis after IR. The administration of creatine mitigated IRIII and reduced bacteremia and proinflammatory responses. Blockade of creatine import compromised the ferroptosis inhibition and mitigation of DTRF on IRIII. Our study demonstrates a radioprotective dietary mode that can reshape the gut microbiota and increase intestinal creatine, which can suppress IR-induced ferroptosis, thereby providing effective countermeasures for IRIII prevention.}, }
@article {pmid40205473, year = {2025}, author = {Rodriguez-Cruz, UE and Ochoa-Sánchez, M and Eguiarte, LE and Souza, V}, title = {Running against the clock: exploring microbial diversity in an extremely endangered microbial oasis in the Chihuahuan Desert.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40205473}, issn = {1574-6941}, support = {//DGAPA/ ; IG200319//UNAM/ ; //Instituto de Ecolog&#xed;a, Universidad Nacional Aut&#xf3;noma de M&#xe9;xico/ ; }, mesh = {RNA, Ribosomal, 16S/genetics ; *Biodiversity ; *Bacteria/classification/genetics/isolation &amp; purification ; Desert Climate ; *Microbiota/genetics ; Phylogeny ; Ecosystem ; Groundwater/microbiology ; }, abstract = {The Cuatro Ciénegas Basin is a biodiversity hotspot known for its unique biodiversity. However, this ecosystem is facing severe anthropogenic threats that are drying its aquatic systems. We investigated microbial communities at three sites with different physicochemical and environmental characteristics (Pozas Rojas, Archean Domes, and the Churince system) within the basin to explore potential connections to deep aquifers and determine if the sites shared microorganisms. Utilizing 16S rRNA gene data, we identified a core microbiota between Pozas Rojas (PR) and Archean Domes (AD). Sulfur reduction appears to shape the microbial connectivity among sites, since sulfur-reducing bacteria has the highest prevalence between samples from PR and AD: Halanaerobium sp. (88.46%) and Desulfovermiculus halophilus (65%); and between the Churince system and AD: Halanaerobium sp. (63%) and D. halophilus (60%). Furthermore, metagenome-assembled genomes from Ectothiorhodospira genus were found in both AD and Churince, suggesting microbial dispersal. An important finding is that microbial diversity in the AD system declined, from 2016 to 2023 the ecosystem lost 29 microbial phyla. If this trend continues, the basin will lose most of its water, resulting in the loss of various prokaryotic lineages and potential biotechnological solutions, such as enzymes or novel antibiotics. Our findings highlighting the need for water extraction regulations to preserve the basin's biodiversity.}, }
@article {pmid40204761, year = {2025}, author = {Li, F and Hooi, SL and Choo, YM and Teh, CSJ and Toh, KY and Lim, LWZ and Lee, YQ and Chong, CW and Ahmad Kamar, A}, title = {Progression of gut microbiome in preterm infants during the first three months.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {12104}, pmid = {40204761}, issn = {2045-2322}, support = {IF047-2021//International Funding/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Infant, Premature ; Infant, Newborn ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Female ; Male ; Prospective Studies ; *Bacteria/genetics/classification ; Infant ; Gestational Age ; Bifidobacterium/genetics/isolation &amp; purification ; Meconium/microbiology ; Metagenomics ; }, abstract = {The colonization and evolution of gut microbiota early in life play a vital role in shaping a healthy, robust immune system for infant health, whether in combating short-term illness or improving long-term health outcomes. Early-life clinical practices may interrupt or disrupt the normal colonization process of the infant gut microbiota, thereby increasing disease susceptibility. In this prospective cohort study, we analyzed the gut microbiota of 46 term and 23 preterm infants using 16S rRNA gene metagenomic sequencing. Fecal samples were collected at six timepoints during the first three months of life. Notably, gestational age was the main factor contributing to differences in the meconium microbial composition. Intriguingly, our study unveiled a more homogeneous microbial composition in preterm infants with more abundant Bifidobacterium from the postnatal age (PNA) of one month. Concurrently, the beneficial bacteria Bifidobacterium and Lactobacillus gradually increased, and the potentially pathogenic bacteria Clostridium, Enterobacter, Enterococcus, Klebsiella, and Pseudomonas gradually decreased. Furthermore, our study underscored a link between decreased microbial diversity of preterm infants and exclusive breastfeeding and antibiotic exposure. Moreover, preterm infants with patent ductus arteriosus (PDA) exhibited reduced microbial diversity but higher abundances of Streptococcus oralis and Streptococcus mitis.}, }
@article {pmid40203979, year = {2025}, author = {Genitsaris, S and Stefanidou, N and Kourkoutmani, P and Michaloudi, E and Gros, M and García-Gómez, E and Petrović, M and Ntziachristos, L and Moustaka-Gouni, M}, title = {Do coastal bacterioplankton communities hold the molecular key to the rapid biodegradation of Polycyclic Aromatic Hydrocarbons (PAHs) from shipping scrubber effluent?.}, journal = {Environmental research}, volume = {277}, number = {}, pages = {121563}, doi = {10.1016/j.envres.2025.121563}, pmid = {40203979}, issn = {1096-0953}, mesh = {*Polycyclic Aromatic Hydrocarbons/metabolism ; *Water Pollutants, Chemical/metabolism ; Biodegradation, Environmental ; *Plankton/metabolism ; *Bacteria/metabolism/genetics ; RNA, Ribosomal, 16S ; Microbiota ; Seawater/microbiology ; }, abstract = {Shipping scrubber effluents, containing a cocktail of Polycyclic Aromatic Hydrocarbons (PAHs), show undisputed effects at single-species experiments while PAHs fate in the marine environment after effluent discharge is still investigated. Bacterioplankton, composed of abundant diverse taxa with xenobiotic-degrading capabilities, are the first responders to scrubber emissions and can affect PAHs impacts on marine life. This work aims to examine the fate of scrubber effluent PAHs and alkyl-PAHs in mesocosms of coastal bacterioplankton communities from a pristine (phytoplankton carbon biomass was 8.16 μg C L[-1]) and a eutrophic (105.35 μg C L[-1]) coastal site. High-throughput 16S rRNA metabarcoding revealed differential responses of the bacterioplankton linked to their initial community structure and population abundances. Taxa known for their PAHs-degrading capacity were retrieved, including the genera Roseobacter, Porticoccus, Marinomonas, Arcobacter, Lentibacter, Lacinutrix, Pseudospirillum, Glaciecola, Vibrio, Marivita, and Mycobacterium, and were found to have increased roles in shifted communities by increasing their relative abundances at least 5-fold in treatments with high scrubber effluent additions. Additionally, metagenomic analysis of shotgun sequencing, indicated an increase on the number of Clusters of Orthologous Genes (COGs) associated with pathways involved in PAHs degradation. Up to 198 more COGs involved in signal transduction were retrieved in scrubber effluent enriched mesocosms compared to controls, while 15, 86, and 136 more COGs associated with naphthalene, aromatic compound, and benzoate degradation, respectively, were detected in the pristine mesocosms after effluent additions. In both experiments, bacterioplankton responses towards xenobiotic degradation under increased PAHs and alkyl-PAHs were coupled with a drop in their concentrations, below the limit of detection by Day 3 of the experiment in the eutrophic community, and by half in Day 6 in the pristine environment's community. Our findings indicate that PAHs and alkyl-PAHs impacts can be rapidly reduced in natural systems of high bacterial activity.}, }
@article {pmid40202375, year = {2025}, author = {Pan, C and Xu, P and Yuan, M and Wei, S and Lu, Y and Lu, H and Zhang, W}, title = {Effects of Different Feeding Patterns on the Gut Virome of 6-Month-Old Infants.}, journal = {Journal of medical virology}, volume = {97}, number = {4}, pages = {e70344}, doi = {10.1002/jmv.70344}, pmid = {40202375}, issn = {1096-9071}, support = {//This study was supported by the Zhenjiang Science and Technology Innovation Funds-Clinical Medicine Key Laboratory and Scientific Research Project of Health Commission of Jiangsu Province./ ; }, mesh = {Humans ; Infant ; *Gastrointestinal Microbiome ; *Virome ; Feces/virology ; *Breast Feeding ; Female ; Male ; *Viruses/classification/genetics/isolation &amp; purification ; Metagenomics ; *Feeding Behavior ; Bacteriophages/genetics/classification/isolation &amp; purification ; Milk, Human/virology ; *Gastrointestinal Tract/virology ; }, abstract = {The gut microbiome is essential for infant health, and in recent years, the impact of enteroviruses on infant health and disease has received increasing attention. The transmission of breast milk phages to the infant gastrointestinal tract contributes to the shaping of the infant gut virome, while breastfeeding regulates the colonization of the infant gut virome. In this study, we collected fecal samples from healthy infants and analyzed the distribution characteristics of infant viral communities by viral metagenomic analysis, and analyzed the differences in infant viral communities under different feeding practices. Our results indicate that the infant intestinal virome consists of phages and eukaryotic viruses. Caudovirales and Microviridae dominated the phage composition, and except for Siphoviridae, which was more predominant in the intestines of formula-fed infants, there were no significant differences in the overall abundance of other Caudovirales and Microviridae in the intestines of infants with different feeding patterns. Breastfeeding can lead to a higher diversity of infant gut viruses through vertical transmission, and a highly diverse gut virome helps maintain the maturation of the gut microbiome. This study informs the shaping of gut virome in healthy infants by breastfeeding and contributes to further research on infant gut virome characteristics and formation processes.}, }
@article {pmid40201423, year = {2025}, author = {Boden, L and Bludau, D and Sieber, G and Deep, A and Baikova, D and David, GM and Hadžiomerović, U and Stach, TL and Boenigk, J}, title = {The impact of elevated temperature and salinity on microbial communities and food selectivity in heterotrophic nanoflagellates in the Boye River.}, journal = {ISME communications}, volume = {5}, number = {1}, pages = {ycaf049}, pmid = {40201423}, issn = {2730-6151}, abstract = {Microbial predator-prey interactions play a crucial role in aquatic food webs. Bacterivorous protists not only regulate the quantity and biomass of bacterial populations but also profoundly influence the structure of bacterial communities. Consequently, alterations in both the quantity and quality of protist bacterivory can influence the overall structure of aquatic food webs. While it is well-documented that changes in environmental conditions or the occurrence of abiotic stressors can lead to shifts in microbial community compositions, the impact of such disturbances on food selection remains unknown. Here, we investigated the effects of elevated temperature and salinization on food selectivity of heterotrophic nanoflagellates by monitoring the uptake of preselected target bacteria via catalyzed reporter deposition fluorescence in situ hybridization and fluorescence microscopy. Our results indicate that salinization, but not increased temperature, significantly increased the flagellates' selection against Microbacterium lacusdiani (Actinomycetota). However, the effect of the reduced grazing pressure was counterbalanced by the negative effect of increased salinity on the growth of Actinomycetota. Our results suggest that the effect of stressors on the feeding behavior of protistan predators may strongly affect the composition of their prey community, when bacterial taxa are concerned that are less sensitive to the particular stressor.}, }
@article {pmid40199830, year = {2025}, author = {Singh, P and Haldhar, P and Das, T and Chaubey, G and Gupta, MK and Kumar, B}, title = {Thermal Stress and Its Effects on the Gut Microbiome of Parthenium Beetles.}, journal = {Archives of insect biochemistry and physiology}, volume = {118}, number = {4}, pages = {e70058}, doi = {10.1002/arch.70058}, pmid = {40199830}, issn = {1520-6327}, support = {//The authors received no specific funding for this work./ ; }, mesh = {Animals ; *Coleoptera/microbiology/physiology ; *Gastrointestinal Microbiome ; *Stress, Physiological ; Bacteria/classification/isolation &amp; purification/genetics ; Hot Temperature ; RNA, Ribosomal, 16S/analysis ; }, abstract = {The gut microbiota plays a vital role in nutrient and energy utilization, as well as in the host's ability to adapt its immune system to environmental changes. As a biological control agent for the invasive Parthenium weed, the Parthenium beetle Zygogramma bicolorata (Z. bicolorata) Pallister is often exposed to fluctuating temperatures, which may induce stress in its natural habitat. This study utilized 16S amplicon sequencing to explore the impact of temperature stress on the gut microbiome of Z. bicolorata under cold (15°C), control (27°C), and hot (35°C) conditions. A total of 11 bacterial phyla and 149 genera were identified, with Firmicutes, Proteobacteria, and Cyanobacteria being the most abundant. Temperature treatments significantly influenced the diversity of the gut microbiota, as evidenced by alpha diversity measures. Principal coordinate analysis further revealed substantial variations in microbiome composition across the different temperature conditions. Additionally, PICRUSt2 analysis suggested that the gut microbiota is linked to metagenomic functions related to amino acid and carbohydrate transport, inorganic ion metabolism, and cellular processes. Our findings suggest that thermal stress alters the gut microbiome of Parthenium beetles, offering new insights into how these beetles may have ecologically adapted to temperature fluctuations, while also highlighting the potential role of gut microbes in maintaining beetle health under environmental stress.}, }
@article {pmid40197788, year = {2025}, author = {Arenas-Montes, J and Alcala-Diaz, JF and Garcia-Fernandez, H and Gutierrez-Mariscal, FM and Lopez-Moreno, A and Luque-Cordoba, D and Arenas-de Larriva, AP and Torres-Peña, JD and Luque, RM and Prodam, F and Priego-Capote, F and Delgado-Lista, J and Lopez-Miranda, J and Camargo, A}, title = {A microbiota pattern associated with cardiovascular events in secondary prevention: the CORDIOPREV study.}, journal = {European heart journal}, volume = {46}, number = {22}, pages = {2104-2115}, doi = {10.1093/eurheartj/ehaf181}, pmid = {40197788}, issn = {1522-9645}, support = {//Fundacion Patrimonio Comunal Olivarero/ ; //CEAS/ ; //Centro de Excelencia en Investigacion sobre Aceite de Oliva/ ; CVI-7450//Junta de Andalucia/ ; //Diputaciones de Jaen y C&#xf3;rdoba/ ; //Ministerio de Medio Ambiente, Medio Rural y Marino/ ; //Spanish Government/ ; AGL2012/39615//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; //MCIN/AEI/10.13039/501100011033/ ; CP14/00114//Instituto de Salud Carlos III/ ; PI-0055-2021//Consejer&#xed;a de Salud y Familias, Junta de Andaluc&#xed;a/ ; //Consejeria de Innovaci&#xf3;n, Ciencia y Empresa, Proyectos de Investigaci&#xf3;n de Excelencia/ ; //European Union/ ; CP14/00114//Programa Miguel-Servet/ ; //Servicio Andaluz de Salud-Junta de Andalucia/ ; C1-0001-2022//Nicolas Monardes Programme Contract/ ; PY20_00256//Junta de Andalucia/ ; PIE14/00005//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; PIE14/00031//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; AGL2015-67896-P//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; PID2019-104362RB//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; PID2019-104362RB-I00//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; PI19/00299//Instituto de Salud Carlos III/ ; DTS19/00007//Instituto de Salud Carlos III/ ; PI22/00925//Instituto de Salud Carlos III/ ; CPII19/00007//Programa Miguel-Servet/ ; }, mesh = {Humans ; Male ; Female ; *Gastrointestinal Microbiome/physiology ; Middle Aged ; *Secondary Prevention/methods ; Aged ; *Cardiovascular Diseases/prevention &amp; control/microbiology ; Feces/microbiology ; *Coronary Disease/microbiology/prevention &amp; control ; }, abstract = {BACKGROUND AND AIMS: Preventing new cardiovascular events in patients with established cardiovascular disease (CVD) is a daunting task for clinicians. Intestinal microbiota may help identify patients at risk, thus improving the strategies of secondary prevention. The aim of this study was to evaluate the baseline differences between the gut microbiota from coronary heart disease (CHD) patients suffering new major adverse cardiovascular events (MACEs) in the following 7 years, compared with CHD patients who did not undergo new MACE in this period, and to build a score associated with the risk of suffering new MACE.<br><br>METHODS: Within the framework of the CORDIOPREV study, a clinical trial that involved 1002 patients with CHD, intestinal microbiota was examined in patients with available faecal samples (n = 679, 132 MACE), through 16S metagenomics on the Illumina MiSeq and Quiime2 software. Lipopolysaccharide (LPS) was measured using limulus amoebocyte lysate test.<br><br>RESULTS: Random survival forest identified 10 bacterial taxa with a higher predictive power for MACE incidence. Receiver operating characteristic curves yielded an area under the curve of 65.2% (59.1%-71.3%) in the training set and 68.6% (59.3%-77.9%) in the validation set. The intestinal microbiota risk score was associated with a MACE incidence hazard ratio of 2.01 (95% confidence interval 1.37-3.22). Lipopolysaccharide analysis showed a greater LPS post-prandial fold change in the MACE group (P = .005).<br><br>CONCLUSIONS: These results reinforce the relationship between intestinal microbiota and CVD and suggest that a microbiota profile is associated with MACE in CHD patients, in addition to higher endotoxaemia.}, }
@article {pmid40197113, year = {2025}, author = {Karabekmez, ME}, title = {Harnessing Human Holobiome and Meta-Multi-Omics Analyses for Medical Applications.}, journal = {Omics : a journal of integrative biology}, volume = {29}, number = {5}, pages = {179-182}, doi = {10.1089/omi.2025.0024}, pmid = {40197113}, issn = {1557-8100}, mesh = {Humans ; High-Throughput Nucleotide Sequencing ; *Metagenomics/methods ; *Microbiota ; Multiomics ; Precision Medicine ; Proteomics/methods ; }, abstract = {Next-generation sequencing technology has revolutionized all fields of living systems, and its applications almost reinvented some research areas including metagenomics. The microbiotas in our body, including those of the oral, nasal, ocular, alveolar, skin regions, and particularly gut microbiota, have close linkages with our health status. Maturation of experimental techniques for metagenomics has been followed by other related omics platforms, for example, metatranscriptomics, metaproteomics, and all possible metacounterparts of multiomics studies. Now, we are on the eve of a meta-multi-omics era for the analysis of human holobiome in medical research. This era will help buttress the current efforts for systems medicine by illuminating the relationships between human holobiome and health or all human diseases including not only cancers but also infectious diseases, autoimmune diseases, obesity, aging, genetic disorders, and psychiatric conditions. Equally important, meta-multi-omics era is also poised to inform the determinants of human health and, by extension, help build individually tailored precision medicine interventions.}, }
@article {pmid40197053, year = {2025}, author = {Langsiri, N and Meyer, W and Irinyi, L and Worasilchai, N and Pombubpa, N and Wongsurawat, T and Jenjaroenpun, P and Luangsa-Ard, JJ and Chindamporn, A}, title = {Optimizing fungal DNA extraction and purification for Oxford Nanopore untargeted shotgun metagenomic sequencing from simulated hemoculture specimens.}, journal = {mSystems}, volume = {10}, number = {6}, pages = {e0116624}, pmid = {40197053}, issn = {2379-5077}, support = {N11A650143//National Research Council of Thailand/ ; RA-MF 47/64//Faculty of Medicine, Chulalongkorn University/ ; HEA663000027//Chulalongkorn University/ ; }, mesh = {*DNA, Fungal/isolation &amp; purification/genetics ; Humans ; *Metagenomics/methods ; *Fungi/genetics ; *Nanopore Sequencing/methods ; Sequence Analysis, DNA/methods ; High-Throughput Nucleotide Sequencing/methods ; Nanopores ; }, abstract = {UNLABELLED: Long-read metagenomics provides a promising alternative approach to fungal identification, circumventing methodological biases, associated with DNA amplification, which is a prerequisite for DNA barcoding/metabarcoding based on the primary fungal DNA barcode (Internal Transcribed Spacer (ITS) region). However, DNA extraction for long-read sequencing-based fungal identification poses a significant challenge, as obtaining long and intact fungal DNA is imperative. Comparing different lysis methods showed that chemical lysis with CTAB/SDS generated DNA from pure fungal cultures with high yields (ranging from 11.20 ± 0.17 µg to 22.99 ± 2.22 µg depending on the species) while preserving integrity. Evaluating the efficacy of human DNA depletion protocols demonstrated an 88.73% reduction in human reads and a 99.53% increase in fungal reads compared to the untreated yeast-spiked human blood control. Evaluation of the developed DNA extraction protocol on simulated clinical hemocultures revealed that the obtained DNA sequences exceed 10 kb in length, enabling a highly efficient sequencing run with over 80% active pores. The quality of the DNA, as indicated by the 260/280 and 260/230 ratios obtained from NanoDrop spectrophotometer readings, exceeded 1.8 and 2.0, respectively. This demonstrated the great potential of the herein optimized protocol to extract high-quality fungal DNA from clinical specimens enabling long-read metagenomics sequencing.<br><br>IMPORTANCE: A novel streamlined DNA extraction protocol was developed to efficiently isolate high molecular weight fungal DNA from hemoculture samples, which is crucial for long-read sequencing applications. By eliminating the need for labor-intensive and shear-force-inducing steps, such as liquid nitrogen grinding or bead beating, the protocol is more user-friendly and better suited for clinical laboratory settings. The automation of cleanup and extraction steps further shortens the overall turnaround time to under 6 hours. Although not specifically designed for ultra-long DNA extraction, this protocol effectively supports fungal identification through Oxford Nanopore Technology (ONT) sequencing. It yields high molecular weight DNA, resulting in longer sequence fragments that improve the number of fungal reads over human reads. Future improvements, including adaptive sampling technology, could further simplify the process by reducing the need for human DNA depletion, paving the way for more automated, bioinformatics-driven workflows.}, }
@article {pmid40197051, year = {2025}, author = {Shamash, M and Sinha, A and Maurice, CF}, title = {Improving gut virome comparisons using predicted phage host information.}, journal = {mSystems}, volume = {10}, number = {5}, pages = {e0136424}, pmid = {40197051}, issn = {2379-5077}, mesh = {*Bacteriophages/genetics/classification/physiology ; *Virome/genetics ; Humans ; *Gastrointestinal Microbiome/genetics ; Animals ; Mice ; Feces/virology/microbiology ; Metagenomics/methods ; Computational Biology/methods ; Bacteria/virology ; }, abstract = {UNLABELLED: The human gut virome is predominantly made up of bacteriophages (phages), viruses that infect bacteria. Metagenomic studies have revealed that phages in the gut are highly individual specific and dynamic. These features make it challenging to perform meaningful cross-study comparisons. While several taxonomy frameworks exist to group phages and improve these comparisons, these strategies provide little insight into the potential effects phages have on their bacterial hosts. Here, we propose the use of predicted phage host families (PHFs) as a functionally relevant, qualitative unit of phage classification to improve these cross-study analyses. We first show that bioinformatic predictions of phage hosts are accurate at the host family level by measuring their concordance to Hi-C sequencing-based predictions in human and mouse fecal samples. Next, using phage host family predictions, we determined that PHFs reduce intra- and interindividual ecological distances compared to viral contigs in a previously published cohort of 10 healthy individuals, while simultaneously improving longitudinal virome stability. Lastly, by reanalyzing a previously published metagenomics data set with >1,000 samples, we determined that PHFs are prevalent across individuals and can aid in the detection of inflammatory bowel disease-specific virome signatures. Overall, our analyses support the use of predicted phage hosts in reducing between-sample distances and providing a biologically relevant framework for making between-sample virome comparisons.<br><br>IMPORTANCE: The human gut virome consists mainly of bacteriophages (phages), which infect bacteria and show high individual specificity and variability, complicating cross-study comparisons. Furthermore, existing taxonomic frameworks offer limited insight into their interactions with bacterial hosts. In this study, we propose using predicted phage host families (PHFs) as a higher-level classification unit to enhance functional cross-study comparisons. We demonstrate that bioinformatic predictions of phage hosts align with Hi-C sequencing results at the host family level in human and mouse fecal samples. We further show that PHFs reduce ecological distances and improve virome stability over time. Additionally, reanalysis of a large metagenomics data set revealed that PHFs are widespread and can help identify disease-specific virome patterns, such as those linked to inflammatory bowel disease.}, }
@article {pmid40196042, year = {2025}, author = {Wang, H and Zhu, W and Lei, J and Liu, Z and Cai, Y and Wang, S and Li, A}, title = {Gut microbiome differences and disease risk in colorectal cancer relatives and healthy individuals.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1573216}, pmid = {40196042}, issn = {2235-2988}, mesh = {Humans ; *Colorectal Neoplasms/microbiology/epidemiology ; *Gastrointestinal Microbiome ; Feces/microbiology ; Male ; Female ; Middle Aged ; Risk Factors ; Aged ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Adult ; Cohort Studies ; Family ; Whole Genome Sequencing ; }, abstract = {Given the heightened focus on high-risk populations, this study aimed to provide insights into early susceptibility and preventive strategies for colorectal cancer (CRC) by focusing on high-risk populations. In this research, fecal samples from 1,647 individuals across three discovery cohorts and nine external validation cohorts were sequenced using whole-genome metagenomic sequencing. A prediction model based on random forest was constructed using the nine external cohorts and independently validated with the three discovery cohorts. A disease probability (POD) model based on microbial biomarkers was developed to assess CRC risk. We found that the gut microbiome composition of CRC relatives differed from that of controls, with enrichment of species such as Fusobacterium and Bacteroides and a reduction in beneficial genera like Coprococcus and Roseburia. Additionally, dietary red meat intake emerged as a risk factor. The POD model indicated an elevated risk of CRC in unaffected relatives. The findings suggest that the POD for CRC may be increased in unaffected relatives or individuals living in shared environments, although this difference did not reach statistical significance. Our study introduces a novel framework for assessing the risk of colorectal cancer in ostensibly healthy individuals.}, }
@article {pmid40195460, year = {2025}, author = {Bhagat, NR and Bharti, VK and Shukla, G and Rishi, P and Chaurasia, OP}, title = {Gut bacteriome dynamics in high altitude-adapted chicken lines: a key to future poultry therapeutics.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {11910}, pmid = {40195460}, issn = {2045-2322}, mesh = {Animals ; *Chickens/microbiology ; *Gastrointestinal Microbiome ; *Altitude ; Metagenomics/methods ; *Bacteria/genetics/classification ; *Adaptation, Physiological ; Metagenome ; }, abstract = {High-altitude-adapted chickens harbor a unique gut bacteriome essential for their survival under extremely cold and hypoxic environment, however, little is known about their population and functional dynamics, limiting their application in poultry production. Hence, this study employed amplicon-based metagenomics to examine the gut bacterial diversity and their functional profile in two high-altitude-adapted chicken lines, e.g. LEHBRO-1 and LEHBRO-3. The results revealed significant variations in taxonomic abundance at the phylum level, with Firmicutes, Proteobacteria, Bacteroidetes, and Actinobacteria predominating in LEHBRO-1, whereas Firmicutes, Proteobacteria, Bacteroidetes, Planctomycetes, and Actinobacteria predominated in LEHBRO-3. Genus-level diversity and Linear Discriminant Analysis Effect Size (LEfSe) biomarker analysis also substantiated the differences in the gut bacterial communities between the two chicken lines. Furthermore, functional profiling revealed enrichment of carbohydrate, nucleotide, lipid, amino acid, fatty acid, energy, and glycan metabolic pathways in the gut bacteriomes of these high-altitude chicken lines. The Statistical Analysis of Metagenomic Profiles (STAMP) for metabolic profiling identified a significant difference in purine and protein metabolism between these two chicken lines. These findings indicate the unique gut bacteriome and their functional diversity in high-altitude-adapted chickens, which would provide a foundation for future research on gut therapeutics to improve chicken health and productivity in high-altitude areas.}, }
@article {pmid40195156, year = {2025}, author = {Sefrji, FO and Abulfaraj, AA and Alshehrei, FM and Al-Andal, A and Alnahari, AA and Tashkandi, M and Baz, L and Barqawi, AA and Almutrafy, AM and Alshareef, SA and Alkhatib, SN and Abuauf, HW and Jalal, RS and Aloufi, AS}, title = {Comprehensive analysis of orthologous genes reveals functional dynamics and energy metabolism in the rhizospheric microbiome of Moringa oleifera.}, journal = {Functional &amp; integrative genomics}, volume = {25}, number = {1}, pages = {82}, pmid = {40195156}, issn = {1438-7948}, mesh = {*Moringa oleifera/microbiology/genetics/metabolism ; *Rhizosphere ; *Microbiota/genetics ; *Energy Metabolism/genetics ; Soil Microbiology ; Bacteria/genetics/classification ; Adenosine Triphosphate/metabolism ; Metagenome ; }, abstract = {Moringa oleifera, known for its nutritional and therapeutic properties, exhibits a complex relationship with its rhizospheric soil microbiome. This study aimed to elucidate the microbiome's structural composition, molecular functions, and its role in plant growth by integrating Clusters of Orthologous Genes (COG) analysis with enzymatic functions previously identified through KEGG, CAZy, and CARD databases. Metagenomic sequencing and bioinformatics analysis were performed from the rhizospheric soil microbiome of M. oleifera collected from the Mecca district in Saudi Arabia. The analysis revealed a role for the rhizospheric microbiome in energy production, storage, and regulation, with glucose serving as a crucial precursor for NADH synthesis and subsequent ATP production via oxidative phosphorylation. Key orthologous genes (OGs) implicated in this process include NuoD, NuoH, NuoM, NuoN, NuoL, atpA, QcrB/PetB, and AccC. Additionally, OGs involved in ATP hydrolysis, such as ClpP, EntF, YopO, and AtoC, were identified. Taxonomic analysis highlighted Actinobacteria and Proteobacteria as the predominant phyla, with enriched genera including Blastococcus, Nocardioides, Streptomyces, Microvirga, Sphingomonas, and Massilia, correlating with specific OGs involved in ATP hydrolysis. This study provides insights into the molecular mechanisms underpinning plant-microbe interactions and highlights the multifaceted roles of ATP-dependent processes in the rhizosphere. Further research is recommended to explore the potential applications of these findings in sustainable agriculture and ecosystem management.}, }
@article {pmid40194944, year = {2025}, author = {Wilson, I and Perry, T and Eisenhofer, R and Rismiller, P and Shaw, M and Grutzner, F}, title = {Microbiota changes in lactation in the short-beaked echidna (Tachyglossus aculeatus).}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40194944}, issn = {1574-6941}, support = {//University of Adelaide/ ; }, mesh = {Animals ; Female ; *Lactation ; *Tachyglossidae/microbiology/physiology ; *Microbiota ; RNA, Ribosomal, 16S/genetics ; Animals, Zoo/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Reproduction ; }, abstract = {Monotreme and marsupial development is characterized by a short gestation, with young exposed to the environment at an early developmental stage and supported by a long lactation in the pouch, pseudo-pouch, or burrow. The lack of a functional adaptive immune system in these altricial young raises questions about how they survive in a microbe-rich environment. Previous studies on marsupial pouches have revealed changes to pouch microbe composition during lactation, but no information is available in monotremes. We investigated changes in the echidna pseudo-pouch microbiota (n = 22) during different stages of the reproductive cycle and whether this differs between wild and zoo-managed animals. Metataxonomic profiling using 16S rRNA gene sequencing revealed that pseudo-pouch microbial communities undergo dramatic changes during lactation, with significant differences in taxonomic composition compared with samples taken outside of breeding season or during courtship and mating. This suggests that the echidna pseudo-pouch environment changes during lactation to accommodate young that lack a functional adaptive immune system. Furthermore, captivity was not found to have a significant effect on pseudo-pouch microbiota. This study pioneers pouch microbiota research in monotremes, provides new biological information on echidna reproduction, and may also provide information about the effects of captive management to inform breeding programmes in the future.}, }
@article {pmid40193404, year = {2025}, author = {Aroney, STN and Newell, RJP and Nissen, JN and Camargo, AP and Tyson, GW and Woodcroft, BJ}, title = {CoverM: read alignment statistics for metagenomics.}, journal = {Bioinformatics (Oxford, England)}, volume = {41}, number = {4}, pages = {}, pmid = {40193404}, issn = {1367-4811}, support = {2022070//EMERGE National Science Foundation/ ; DE-SC0004632//Genomic Science Program of the United States Department of Energy/ ; }, mesh = {*Metabolomics/methods ; *Biostatistics/methods ; *Microbiota ; *Software Design ; Genome ; }, abstract = {SUMMARY: Genome-centric analysis of metagenomic samples is a powerful method for understanding the function of microbial communities. Calculating read coverage is a central part of analysis, enabling differential coverage binning for recovery of genomes and estimation of microbial community composition. Coverage is determined by processing read alignments to reference sequences of either contigs or genomes. Per-reference coverage is typically calculated in an ad-hoc manner, with each software package providing its own implementation and specific definition of coverage. Here we present a unified software package CoverM which calculates several coverage statistics for contigs and genomes in an ergonomic and flexible manner. It uses "Mosdepth arrays" for computational efficiency and avoids unnecessary I/O overhead by calculating coverage statistics from streamed read alignment results.<br><br>CoverM is free software available at https://github.com/wwood/coverm. CoverM is implemented in Rust, with Python (https://github.com/apcamargo/pycoverm) and Julia (https://github.com/JuliaBinaryWrappers/CoverM_jll.jl) interfaces.}, }
@article {pmid40193328, year = {2025}, author = {Jagadesan, S and Guda, C}, title = {MetaDAVis: An R shiny application for metagenomic data analysis and visualization.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0319949}, pmid = {40193328}, issn = {1932-6203}, mesh = {*Metagenomics/methods ; Humans ; RNA, Ribosomal, 16S/genetics ; *Software ; *Metagenome ; Microbiota/genetics ; High-Throughput Nucleotide Sequencing ; }, abstract = {The human microbiome exerts tremendous influence on maintaining a balance between human health and disease. High-throughput sequencing has enabled the study of microbial communities at an unprecedented resolution. Generation of massive amounts of sequencing data has also presented novel challenges to analyzing and visualizing data to make biologically relevant interpretations. We have developed an interactive Metagenome Data Analysis and Visualization (MetaDAVis) tool for 16S rRNA as well as the whole genome sequencing data analysis and visualization to address these challenges using an R Shiny application. MetaDAVis can perform six different types of analyses that include: i) Taxonomic abundance distribution; ii) Alpha and beta diversity analyses; iii) Dimension reduction tasks using PCA, t-SNE, and UMAP; iv) Correlation analysis using taxa- or sample-based data; v) Heatmap generation; and vi) Differential abundance analysis. MetaDAVis creates interactive and dynamic figures and tables from multiple methods enabling users to easily understand their data using different variables. Our program is user-friendly and easily customizable allowing those without any programming background to perform comprehensive data analyses using a standalone or web-based interface.}, }
@article {pmid40192235, year = {2025}, author = {Jiao, Y and Ren, J and Xie, S and Yuan, N and Shen, J and Yin, H and Wang, J and Guo, H and Cao, J and Wang, X and Wu, D and Zhou, Z and Qi, X}, title = {Raffinose-metabolizing bacteria impair radiation-associated hematopoietic recovery via the bile acid/FXR/NF-κB signaling pathway.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2488105}, pmid = {40192235}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome/radiation effects ; *Bile Acids and Salts/metabolism ; Mice ; *NF-kappa B/metabolism/genetics ; Signal Transduction/radiation effects ; *Raffinose/metabolism ; Mice, Inbred C57BL ; Whole-Body Irradiation/adverse effects ; *Receptors, Cytoplasmic and Nuclear/metabolism/genetics ; Fecal Microbiota Transplantation ; Male ; *Acute Radiation Syndrome/microbiology/metabolism ; *Hematopoiesis/radiation effects ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; Dysbiosis/microbiology ; }, abstract = {Radiation-associated hematopoietic recovery (RAHR) is critical for mitigating lethal complications of acute radiation syndrome (ARS), yet therapeutic strategies remain limited. Through integrated multi-omics analysis of a total body irradiation (TBI) mouse model, we identify Bacteroides acidifaciens-dominated gut microbiota as key mediators of RAHR impairment. 16S ribosomal rRNA sequencing revealed TBI-induced dysbiosis characterized by Bacteroidaceae enrichment, while functional metagenomics identified raffinose metabolism as the most significantly perturbed pathway. Notably, raffinose supplementation (10% w/v) recapitulated radiation-induced microbiota shifts and delayed bone marrow recovery. Fecal microbiota transplantation (FMT) revealed a causative role for raffinose-metabolizing microbiota, particularly Bacteroides acidifaciens, in delaying RAHR progression. Mechanistically, B. acidifaciens-mediated bile acid deconjugation activated FXR, subsequently suppressing NF-κB-dependent hematopoietic recovery. Therapeutic FXR inhibition via ursodeoxycholic acid (UDCA) had been shown to be a viable method for rescuing RAHR. Our results delineated a microbiome-bile acid-FXR axis as a master regulator of post-irradiation hematopoiesis. Targeting B. acidifaciens or its metabolic derivatives could represent a translatable strategy to mitigate radiation-induced hematopoietic injury.}, }
@article {pmid40190795, year = {2025}, author = {Zhang, Y and Dai, Y and Li, J and Cong, W and Zhang, Y and Nie, X and Wu, Q and Xue, Y}, title = {Climate Change and Human Pressure: Assessing the Vulnerability of Snow Leopard (Panthera uncia) Habitat Integrated With Prey Distribution on the Qinghai-Tibet Plateau.}, journal = {Ecology and evolution}, volume = {15}, number = {4}, pages = {e71232}, pmid = {40190795}, issn = {2045-7758}, abstract = {Climate change is significantly altering the distribution of large carnivores and their primary prey species, with particular emphasis on the changing prey distribution in high-altitude regions. The Qinghai-Tibet Plateau, known for its rich biodiversity, is highly sensitive to climate change, affecting the habitats of snow leopards (Panthera uncia) and blue sheep (Pseudois nayaur). Our study identified blue sheep as the primary prey of snow leopards through metagenomic analysis and used bioclimatic data and Land Use/Cover Change (LUCC) information to model habitat suitability under three climate scenarios (RCP 2.6, RCP 4.5, and RCP 8.5). Projections showed that under RCP 4.5 and RCP 8.5, snow leopard habitats will decrease by 13.0% and 23.4%, while blue sheep habitats will decrease by 38.3% and 49.7%, respectively. These habitats are expected to shift to higher altitudes, with snow leopards experiencing a more significant shift. Based on these findings, we recommend adjusting protected area boundaries for S1 (Ideal distribution range), establishing ecological corridors for S2 (stepping stone), and implementing targeted measures to mitigate human-wildlife conflicts in S3 (potential conflict area). To protect these species, international efforts to reduce carbon emissions, cross-administrative cooperation, and community-based conservation strategies are essential.}, }
@article {pmid40190120, year = {2025}, author = {Aboulalazm, FA and Kazen, AB and deLeon, O and Müller, S and Saravia, FL and Lozada-Fernandez, V and Hadiono, MA and Keyes, RF and Smith, BC and Kellogg, SL and Grobe, JL and Kindel, TL and Kirby, JR}, title = {Reutericyclin, a specialized metabolite of Limosilactobacillus reuteri, mitigates risperidone-induced weight gain in mice.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2477819}, pmid = {40190120}, issn = {1949-0984}, support = {F31 DK137415/DK/NIDDK NIH HHS/United States ; R01 HL134850/HL/NHLBI NIH HHS/United States ; R21 AG075501/AG/NIA NIH HHS/United States ; P01 HL084207/HL/NHLBI NIH HHS/United States ; R01 HL158900/HL/NHLBI NIH HHS/United States ; R01 DK133121/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; *Risperidone/adverse effects ; *Limosilactobacillus reuteri/metabolism ; *Weight Gain/drug effects ; Female ; Gastrointestinal Microbiome/drug effects ; Mice ; Mice, Inbred C57BL ; *Antipsychotic Agents/adverse effects ; Probiotics/administration &amp; dosage ; Feces/microbiology ; Energy Metabolism/drug effects ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; }, abstract = {The role of xenobiotic disruption of microbiota, corresponding dysbiosis, and potential links to host metabolic diseases are of critical importance. In this study, we used a widely prescribed antipsychotic drug, risperidone, known to influence weight gain in humans, to induce weight gain in C57BL/6J female mice. We hypothesized that microbes essential for maintaining gut homeostasis and energy balance would be depleted following treatment with risperidone, leading to enhanced weight gain relative to controls. Thus, we performed metagenomic analyses on stool samples to identify microbes that were excluded in risperidone-treated animals but remained present in controls. We identified multiple taxa including Limosilactobacillus reuteri as a candidate for further study. Oral supplementation with L. reuteri protected against risperidone-induced weight gain (RIWG) and was dependent on cellular production of a specialized metabolite, reutericyclin. Further, synthetic reutericyclin was sufficient to mitigate RIWG. Both synthetic reutericyclin and L. reuteri restored energy balance in the presence of risperidone to mitigate excess weight gain and induce shifts in the microbiome associated with leanness. In total, our results identify reutericyclin production by L. reuteri as a potential probiotic to restore energy balance induced by risperidone and to promote leanness.}, }
@article {pmid40189749, year = {2025}, author = {Birebent, R and Drubay, D and Alves Costa Silva, C and Marmorino, F and Vitali, G and Piccinno, G and Hurtado, Y and Bonato, A and Belluomini, L and Messaoudene, M and Routy, B and Fidelle, M and Zalcman, G and Mazieres, J and Audigier-Valette, C and Moro-Sibilot, D and Goldwasser, F and Scherpereel, A and Pegliasco, H and Ghiringhelli, F and Reni, A and Barlesi, F and Albiges, L and Planchard, D and Martinez, S and Besse, B and Segata, N and Cremolini, C and Zitvogel, L and Iebba, V and Derosa, L}, title = {Surrogate markers of intestinal dysfunction associated with survival in advanced cancers.}, journal = {Oncoimmunology}, volume = {14}, number = {1}, pages = {2484880}, pmid = {40189749}, issn = {2162-402X}, support = {U01 CA230551/CA/NCI NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; *Dysbiosis/microbiology ; Middle Aged ; *Colorectal Neoplasms/mortality/microbiology/pathology ; Aged ; Prognosis ; *Carcinoma, Non-Small-Cell Lung/mortality/microbiology/pathology ; *Lung Neoplasms/mortality/microbiology/pathology ; Akkermansia/isolation &amp; purification ; *Urogenital Neoplasms/mortality/microbiology/pathology ; }, abstract = {Deviations in the diversity and composition of the gut microbiota are called "gut dysbiosis". They have been linked to various chronic diseases including cancers and resistance to immunotherapy. Stool shotgun based-metagenomics informs on the ecological composition of the gut microbiota and the prevalence of homeostatic bacteria such as Akkermansia muciniphila (Akk), while determination of the serum addressin MAdCAM-1 instructs on endothelial gut barrier dysfunction. Here we examined patient survival during chemo-immuno-therapy in 955 cancer patients across four independent cohorts of non-small cell lung (NSCLC), genitourinary (GU) and colorectal (CRC) cancers, according to hallmarks of gut dysbiosis. We show that Akk prevalence represents a stable and favorable phenotype in NSCLC and CRC cancer patients. Over-dominance of Akk above the healthy threshold was observed in dismal prognosis in NSCLC and GU and mirrored an immunosuppressive gut ecosystem and excessive intestinal epithelial exfoliation in NSCLC. In CRC, the combination of a lack of Akk and low sMAdCAM-1 levels identified a subset comprising 28% of patients with reduced survival, independent of the immunoscore. We conclude that gut dysbiosis hallmarks deserve integration within the diagnosis toolbox in oncological practice.}, }
@article {pmid40189708, year = {2025}, author = {Gen-Jiménez, A and Flores-Félix, JD and Rincón-Molina, CI and Manzano-Gómez, LA and Villalobos-Maldonado, JJ and Ruiz-Lau, N and Roca-Couso, R and Ruíz-Valdiviezo, VM and Rincón-Rosales, R}, title = {Native Rhizobium biofertilization enhances yield and quality in Solanum lycopersicum under field conditions.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {41}, number = {4}, pages = {126}, pmid = {40189708}, issn = {1573-0972}, support = {19337.24-P//Tecnol&#xf3;gico Nacional de M&#xe9;xico/ ; }, mesh = {*Solanum lycopersicum/growth &amp; development/microbiology ; *Rhizobium/physiology ; Soil Microbiology ; *Fertilizers ; Soil/chemistry ; Fruit/growth &amp; development ; Nitrogen/analysis/metabolism ; Microbiota ; Agriculture/methods ; }, abstract = {In response to growing concerns about the environmental and economic impacts of chemical fertilizers, this study explores the potential of biofertilization using native Rhizobium strains to enhance the growth, yield, and quality of Solanum lycopersicum (tomato) under field conditions. The experiment assessed the effects of Rhizobium biofertilization on plant performance and soil microbial communities by applying R. calliandrae, R. jaguaris, R. mayense, and a bacterial consortium, in comparison to conventional chemical fertilization. Key parameters such as plant height, fruit yield, macronutrient and micronutrient content, and fruit quality (lycopene and β-carotene levels) were measured. Results showed that R. calliandrae and R. jaguaris significantly enhanced fruit yield, nitrogen, potassium, manganese, and boron levels, while also improving fruit quality compared to the control. The impact of strain inoculation on the structure of the microbial community was also examined. Metataxonomic analysis of rhizospheric soils revealed no significant changes in microbial diversity, indicating that biofertilization with Rhizobium strains promotes plant growth without disrupting the composition of the soil microbiome. These findings suggest that Rhizobium biofertilization is a viable and sustainable alternative to chemical fertilizers, providing benefits to both crop productivity and soil health while minimizing the environmental footprint associated with conventional agricultural practices. The study underscores the importance of carefully selecting bacterial species with complementary functions to maximize the effectiveness of biofertilization strategies.}, }
@article {pmid40189564, year = {2025}, author = {He, Y and Zhuo, S and Li, M and Pan, J and Jiang, Y and Hu, Y and Sanford, RA and Lin, Q and Sun, W and Wei, N and Peng, S and Jiang, Z and Li, S and Li, Y and Dong, Y and Shi, L}, title = {Candidate Phyla Radiation (CPR) bacteria from hyperalkaline ecosystems provide novel insight into their symbiotic lifestyle and ecological implications.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {94}, pmid = {40189564}, issn = {2049-2618}, support = {42472366, 92051111 and 42272353//National Natural Science Foundation of China/ ; 122-G1323522144//Fundamental Research Funds for the Chinese Central Government via China University of Geosciences (Wuhan)/ ; }, mesh = {*Symbiosis ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Metagenomics/methods ; Metagenome ; Folic Acid/biosynthesis ; Ecosystem ; Phylogeny ; Genome, Bacterial ; *Microbiota ; }, abstract = {BACKGROUND: Candidate Phyla Radiation (CPR) represents a unique superphylum characterized by ultra-small cell size and symbiotic lifestyle. Although CPR bacteria have been identified in varied environments, their broader distribution, associations with hosts, and ecological roles remain largely unexplored. To address these knowledge gaps, a serpentinite-like environment was selected as a simplified model system to investigate the CPR communities in hyperalkaline environments and their association with hosts in extreme conditions. Additionally, the enzymatic activity, global distribution, and evolution of the CPR-derived genes encoding essential metabolites (e.g., folate or vitamin B9) were analyzed and assessed.<br><br>RESULTS: In the highly alkaline serpentinite-like ecosystem (pH&#x2009;=&#x2009;10.9-12.4), metagenomic analyses of the water and sediment samples revealed that CPR bacteria constituted 1.93-34.8% of the microbial communities. Metabolic reconstruction of 12 high-quality CPR metagenome-assembled genomes (MAGs) affiliated to the novel taxa from orders UBA6257, UBA9973, and Paceibacterales suggests that these bacteria lack the complete biosynthetic pathways for amino acids, lipids, and nucleotides. Notably, the CPR bacteria commonly harbored the genes associated with essential folate cofactor biosynthesis and metabolism, including dihydrofolate reductase (folA), serine hydroxymethyltransferase (glyA), and methylenetetrahydrofolate reductase (folD). Additionally, two presumed auxotrophic hosts, incapable of forming tetrahydrofolate (THF) due to the absence of folA, were identified as potential hosts for some CPR bacteria harboring folA genes. The functionality of these CPR-derived folA genes was experimentally verified by heterologous expression in the folA-deletion mutant Escherichia coli MG1655 &#x394;folA. Further assessment of the available CPR genomes (n&#x2009;=&#x2009;4,581) revealed that the genes encoding the proteins for the synthesis of bioactive folate derivatives (e.g., folA, glyA, and/or folD genes) were present in 90.8% of the genomes examined. It suggests potential widespread metabolic complementarity in folate biosynthesis between CPR and their hosts.<br><br>CONCLUSIONS: This finding deepens our understanding of the mechanisms of CPR-host symbiosis, providing novel insight into essential cofactor-dependent mutualistic CPR-host interactions. Our observations suggest that CPR bacteria may contribute to auxotrophic organisms and indirectly influence biogeochemical processes. Video Abstract.}, }
@article {pmid40189545, year = {2025}, author = {Serrana, JM and Nascimento, FJA and Dessirier, B and Broman, E and Posselt, M}, title = {Environmental drivers of the resistome across the Baltic Sea.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {92}, pmid = {40189545}, issn = {2049-2618}, mesh = {*Bacteria/genetics/drug effects/classification/isolation &amp; purification ; *Microbiota/genetics ; *Seawater/microbiology ; Oceans and Seas ; *Geologic Sediments/microbiology ; Metagenome ; Salinity ; Anti-Bacterial Agents/pharmacology ; Temperature ; }, abstract = {BACKGROUND: Antimicrobial resistance is a major global health concern, with the environment playing a key role in its emergence and spread. Understanding the relationships between environmental factors, microbial communities, and resistance mechanisms is vital for elucidating environmental resistome dynamics. In this study, we characterized the environmental resistome of the Baltic Sea and evaluated how environmental gradients and spatial variability, alongside its microbial communities and associated functional genes, influence resistome diversity and composition across geographic regions.<br><br>RESULTS: We analyzed the metagenomes of benthic sediments from 59 monitoring stations across a 1,150&#xa0;km distance of the Baltic Sea, revealing an environmental resistome comprised of predicted antimicrobial resistance genes (ARGs) associated with resistance against 26 antibiotic classes. We observed spatial variation in its resistance profile, with higher resistome diversity in the northern regions and a decline in the dead zones and the southern areas. The combined effects of salinity and temperature gradients, alongside nutrient availability, created a complex environmental landscape that shaped the diversity and distribution of the predicted ARGs. Salinity predominantly influenced microbial communities and predicted ARG composition, leading to clear distinctions between high-saline regions and those with lower to mid-level salinity. Furthermore, our analysis suggests that microbial community composition and mobile genetic elements might be crucial in shaping ARG diversity and composition.<br><br>CONCLUSIONS: We presented that salinity and temperature were identified as the primary environmental factors influencing resistome diversity and distribution across geographic regions, with nutrient availability further shaping these patterns in the Baltic Sea. Our study also highlighted the interplay between microbial communities, resistance, and associated functional genes in the benthic ecosystem, underscoring the potential role of microbial and mobile genetic element composition in ARG distribution. Understanding how environmental factors and microbial communities modulate environmental resistomes will help predict the impact of future environmental changes on resistance mechanisms in complex aquatic ecosystems. Video Abstract.}, }
@article {pmid40189243, year = {2025}, author = {Chitcharoen, S and Sawaswong, V and Klomkliew, P and Chanchaem, P and Payungporn, S}, title = {Comparative analysis of human gut bacterial microbiota between shallow shotgun metagenomic sequencing and full-length 16S rDNA amplicon sequencing.}, journal = {Bioscience trends}, volume = {19}, number = {2}, pages = {232-242}, doi = {10.5582/bst.2024.01393}, pmid = {40189243}, issn = {1881-7823}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *RNA, Ribosomal, 16S/genetics ; *Metagenomics/methods ; Feces/microbiology ; *Bacteria/genetics/classification ; DNA, Bacterial/genetics ; DNA, Ribosomal/genetics ; Metagenome ; Sequence Analysis, DNA/methods ; }, abstract = {The human gut microbiome is increasingly recognized as important to health and disease, influencing immune function, metabolism, mental health, and chronic illnesses. Two widely used, cost-effective, and fast approaches for analyzing gut microbial communities are shallow shotgun metagenomic sequencing (SSMS) and full-length 16S rDNA sequencing. This study compares these methods across 43 stool samples, revealing notable differences in taxonomic and species-level detection. At the genus level, Bacteroides was most abundant in both methods, with Faecalibacterium showing similar trends but Prevotella was more abundant in full-length 16S rDNA. Genera such as Alistipes and Akkermansia were more frequently detected by full-length 16S rDNA, whereas Eubacterium and Roseburia were more prevalent in SSMS. At the species level, Faecalibacterium prausnitzii, a key indicator of gut health, was abundant across both datasets, while Bacteroides vulgatus was more frequently detected by SSMS. Species within Parabacteroides and Bacteroides were primarily detected by 16S rDNA, contrasting with higher SSMS detection of Prevotella copri and Oscillibacter valericigenes. LEfSe analysis identified 18 species (9 species in each method) with significantly different detection between methods, underscoring the impact of methodological choice on microbial diversity and abundance. Differences in classification databases, such as Ribosomal Database Project (RDP) for 16S rDNA and Kraken2 for SSMS, further highlight the influence of database selection on outcomes. These findings emphasize the importance of carefully selecting sequencing methods and bioinformatics tools in microbiome research, as each approach demonstrates unique strengths and limitations in capturing microbial diversity and relative abundances.}, }
@article {pmid40188743, year = {2025}, author = {Deng, K and Wang, L and Nguyen, SM and Shrubsole, MJ and Cai, Q and Lipworth, L and Gupta, DK and Zheng, W and Shu, XO and Yu, D}, title = {A dietary pattern promoting gut sulfur metabolism is associated with increased mortality and altered circulating metabolites in low-income American adults.}, journal = {EBioMedicine}, volume = {115}, number = {}, pages = {105690}, pmid = {40188743}, issn = {2352-3964}, support = {R01 HL149779/HL/NHLBI NIH HHS/United States ; U01 CA202979/CA/NCI NIH HHS/United States ; }, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Biomarkers ; Black or African American ; *Diet ; *Gastrointestinal Microbiome ; *Metabolome ; Metabolomics/methods ; *Poverty ; Prospective Studies ; *Sulfur/metabolism ; United States/epidemiology ; }, abstract = {BACKGROUND: Excessive hydrogen sulfide in the gut, generated by sulfur-metabolising bacteria from foods, has been linked to intestinal inflammation and human diseases. We aim to investigate the interplay between diet and sulphur-metabolising bacteria in relation to mortality and circulating metabolites in understudied populations.<br><br>METHODS: In the Southern Community Cohort Study (SCCS), a prospective cohort of primarily low-income American adults, habitual diets were assessed using a food frequency questionnaire at baseline (2002-2009). A sulfur microbial diet score (SMDS) was developed among 514 Black/African American participants by linking habitual dietary intakes with the abundance of sulfur-metabolising bacteria profiled by faecal shotgun metagenomics. The SMDS was then constructed among all eligible SCCS participants (50,114 Black/African American and 23,923 non-Hispanic White adults), and its associations with mortality outcomes were examined by Cox proportional hazards model and Fine-Grey subdistribution hazard model. The association between SMDS and 1110 circulating metabolites was examined by linear regression among 1688 SCCS participants with untargeted metabolomic profiling of baseline plasma samples.<br><br>FINDINGS: Over an average 13.9-year follow-up, SMDS was associated with increased all-cause mortality (HR [95% CI] for the highest vs. lowest quartiles: 1.21 [1.15-1.27]) and cardiovascular disease (1.18 [1.08-1.29]), cancer (1.13 [1.02-1.25]), and gastrointestinal cancer-specific (1.22 [1.00-1.49]) mortality among Black/African American participants (all P-trend<0.05). The associations were largely consistent across participant subgroups. Similar results were observed among non-Hispanic White participants. The SMDS was associated with 112 circulating metabolites, which mediated 36.15% of the SMDS-mortality association (P = 0.002).<br><br>INTERPRETATION: A dietary pattern promoting sulfur-metabolising gut bacteria may contribute to increased total and disease mortality in low-income American adults.<br><br>FUNDING: This study was funded by the National Institutes of Health, United States, to Vanderbilt University Medical Center, United States, and Anne Potter Wilson Chair endowment to Vanderbilt University, United States.}, }
@article {pmid40188549, year = {2025}, author = {Sun, J and Yang, W and Li, M and Zhang, S and Sun, Y and Wang, F}, title = {Metagenomic analysis reveals soil microbiome responses to microplastics and ZnO nanoparticles in an agricultural soil.}, journal = {Journal of hazardous materials}, volume = {492}, number = {}, pages = {138164}, doi = {10.1016/j.jhazmat.2025.138164}, pmid = {40188549}, issn = {1873-3336}, mesh = {*Zinc Oxide/toxicity ; *Microplastics/toxicity ; *Soil Microbiology ; *Microbiota/drug effects ; *Soil Pollutants/toxicity ; Metagenomics ; *Nanoparticles/toxicity ; Bacteria/drug effects/genetics ; Agriculture ; Fungi/drug effects/genetics ; Soil/chemistry ; *Metal Nanoparticles/toxicity ; }, abstract = {Both microplastics (MPs) and engineered nanoparticles are pervasive emerging contaminants that can produce combined toxicity to terrestrial ecosystems, yet their effects on soil microbiomes remain inadequately understood. Here, metagenomic analysis was employed to investigate the impacts of three common MPs [i.e., polyethylene (PE), polystyrene (PS), and polylactic acid (PLA)] and zinc oxide nanoparticles (nZnO) on soil microbiomes. Both MPs and nZnO significantly altered the taxonomic, genetic, and functional diversity of soil microbes, with distinct effects depending on dosage or type. Archaea, fungi, and viruses exhibited more pronounced responses compared to bacteria. Higher doses of MPs and nZnO reduced gene abundance for nutrient cycles like C degradation and N cycling, but enhanced CO2 fixation and S metabolism. nZnO consistently decreased the complexity, connectivity, and modularity of microbial networks; however, these negative effects could be mitigated by co-existing MPs, particularly at elevated doses. Notably, PLA (10 %, w/w) exhibited greater harm to fungal communities and increased negative interactions between microbes and nutrient-cycling genes, posing unique risks compared to PE and PS. These findings demonstrate that MPs and nZnO interact synergistically, complicating ecological predictions and emphasizing the need to consider pollutant interactions in ecological risk assessments, particularly for biodegradable MPs.}, }
@article {pmid40187695, year = {2025}, author = {Palumbo, S and Lucarelli, G and Lasorsa, F and Damiano, R and Autorino, R and Aveta, A and Spena, G and Perdonà, S and Russo, P and Giulioni, C and Cafarelli, A and Finati, M and Siracusano, S and Pandolfo, SD}, title = {Urobiome and Inflammation: A Systematic Review on Microbial Imbalances and Diagnostic Tools for Urinary Disorders.}, journal = {Urology}, volume = {200}, number = {}, pages = {206-215}, doi = {10.1016/j.urology.2025.03.050}, pmid = {40187695}, issn = {1527-9995}, mesh = {Humans ; *Microbiota ; *Urinary Tract Infections/microbiology/diagnosis ; *Dysbiosis/microbiology/diagnosis ; *Cystitis, Interstitial/microbiology/diagnosis ; *Urethritis/microbiology/diagnosis ; }, abstract = {OBJECTIVE: To synthesize current knowledge on urobiome alterations, innovative diagnostic advancements, and emerging therapeutic strategies targeting urobiome dysbiosis in inflammatory urinary tract disorders, including urinary tract infections, nongonococcal urethritis, and interstitial cystitis.<br><br>METHODS: A systematic review was conducted by screening the most important scientific databases. The search included the keywords: (microbiome) OR (microbial) OR (bacteria) OR (bacterial profile) AND (urine) OR (urinary) AND (first-morning sample) OR (first void). Only original studies in English involving human specimens were considered.<br><br>RESULTS: Of the 760 articles initially identified, a final sample of 20 original studies met the inclusion criteria. Disruptions in the urobiome composition were associated with increased colonization by pathogens such as Escherichia coli and Mycoplasma genitalium, resulting in inflammation and recurrent urinary conditions. Advanced diagnostic techniques, including metaproteomics, metagenomics, and point-of-care assays such as Neisseria gonorrhoeae lateral flow assay, demonstrated enhanced capabilities for rapid pathogen detection and differentiation of inflammatory conditions. Therapeutic interventions targeting urobiome dysbiosis, particularly probiotics (Lactobacillus rhamnosus, L. reuteri, L. crispatus), showed promising efficacy in reducing recurrence and inflammation in clinical trials.<br><br>CONCLUSION: Urobiome dysbiosis plays a critical role in inflammatory urinary tract disorders. Innovative diagnostic methods and targeted therapeutic approaches, especially probiotics, offer substantial potential to improve patient outcomes. Further research is warranted to refine these strategies and validate their clinical applicability.}, }
@article {pmid40187295, year = {2025}, author = {Coskuner-Weber, O and Alpsoy, S and Yolcu, O and Teber, E and de Marco, A and Shumka, S}, title = {Metagenomics studies in aquaculture systems: Big data analysis, bioinformatics, machine learning and quantum computing.}, journal = {Computational biology and chemistry}, volume = {118}, number = {}, pages = {108444}, doi = {10.1016/j.compbiolchem.2025.108444}, pmid = {40187295}, issn = {1476-928X}, mesh = {*Machine Learning ; *Metagenomics ; *Aquaculture ; *Computational Biology ; *Big Data ; Animals ; Fishes ; }, abstract = {The burgeoning field of aquaculture has become a pivotal contributor to global food security and economic growth, presently surpassing capture fisheries in aquatic animal production as evidenced by recent statistics. However, the dense fish populations inherent in aquaculture systems exacerbate abiotic stressors and promote pathogenic spread, posing a risk to sustainability and yield. This study delves into the transformative potential of metagenomics, a method that directly retrieves genetic material from environmental samples, in elucidating microbial dynamics within aquaculture ecosystems. Our findings affirm that metagenomics, bolstered by tools in big data analytics, bioinformatics, and machine learning, can significantly enhance the precision of microbial assessment and pathogen detection. Furthermore, we explore quantum computing's emergent role, which promises unparalleled efficiency in data processing and model construction, poised to address the limitations of conventional computational techniques. Distinct from metabarcoding, metagenomics offers an expansive, unbiased profile of microbial biodiversity, revolutionizing our capacity to monitor, predict, and manage aquaculture systems with high accuracy and adaptability. Despite the challenges of computational demands and variability in data standardization, this study advocates for continued technological integration, thereby fostering resilient and sustainable aquaculture practices in a climate of escalating global food requirements.}, }
@article {pmid40187012, year = {2025}, author = {Khan, MM and Mushtaq, MA and Suleman, M and Ahmed, U and Ashraf, MF and Aslam, R and Mohsin, M and Rödiger, S and Sarwar, Y and Schierack, P and Ali, A}, title = {Fecal microbiota landscape of commercial poultry farms in Faisalabad, Pakistan: A 16S rRNA gene-based metagenomics study.}, journal = {Poultry science}, volume = {104}, number = {6}, pages = {105089}, pmid = {40187012}, issn = {1525-3171}, mesh = {Animals ; Pakistan ; *Chickens/microbiology ; RNA, Ribosomal, 16S/analysis/genetics ; *Feces/microbiology ; Metagenomics ; *Bacteria/isolation &amp; purification/classification/genetics ; *Gastrointestinal Microbiome ; Animal Husbandry ; RNA, Bacterial/analysis ; Farms ; }, abstract = {This study explores the microbiota of broiler and layer farms, aiming to understand how genetic breed, age, and farm type influence microbial communities in commercial settings. Fecal samples from 18 poultry farms (twelve layers and six broilers) in Faisalabad, Pakistan were analyzed using 16S rRNA gene sequencing of the V3-V4 region to evaluate bacterial composition. The dominant phylum, Firmicutes, accounted for 58.72 % of the microbial population, with Lactobacillus being the most abundant genus in both broilers and layers. The total abundance of potentially pathogenic genera was also assessed with Enterococcus and Corynebacterium being the most prevalent across all farms, regardless of bird type. Layers exhibited greater microbial richness and diversity than broilers, while the Karachi cage system (KCS) farm type showed higher richness than Floor system (FS). Although the breed significantly influenced microbial diversity, age was not a determining factor. Co-occurrence analyses revealed close interactions among phyla (Actinobacteriota, Proteobacteria, Firmicutes, Fusobacteriota, and Bacteroidota) and genera (Lactobacillus, Brevibacterium, Enterococcus), suggesting their pivotal roles within the microbial community. Additionally, functional analysis detected important metabolic pathways and traced microbial signatures of key pathogenic bacteria, enhancing our understanding of microbial contributions to poultry health. Despite limitations such as the need for broader geographic sampling and accounting for diet and medication, this study advances microbiome research in Pakistan's poultry sector, emphasizing consistent taxa and opening avenues for future investigations into microbiome manipulations for improved food safety and achieve better sustainable practices.}, }
@article {pmid40185819, year = {2025}, author = {Manzoor, M and Leskelä, J and Pietiäinen, M and Martinez-Majander, N and Könönen, E and Sinisalo, J and Putaala, J and Pussinen, PJ and Paju, S}, title = {Oral microbiome dysbiosis in cryptogenic ischemic stroke patients with high-risk patent foramen ovale.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {11535}, pmid = {40185819}, issn = {2045-2322}, support = {286246//Research Council of Finland/ ; 340750//Research Council of Finland/ ; 355532//Research Council of Finland/ ; TYH2014407//Helsinki and Uusimaa Hospital District/ ; TYH2018318//Helsinki and Uusimaa Hospital District/ ; }, mesh = {Humans ; *Foramen Ovale, Patent/complications/microbiology ; Female ; Male ; *Ischemic Stroke/microbiology/etiology/complications ; *Dysbiosis/microbiology/complications ; *Microbiota ; Adult ; Middle Aged ; Saliva/microbiology ; Case-Control Studies ; *Mouth/microbiology ; Risk Factors ; }, abstract = {Patent foramen ovale (PFO) is the most common congenital heart abnormality of foetal origin and has been associated with cryptogenic ischemic stroke (CIS) through several mechanisms, with most theories supporting paradoxical embolism. Other possible but unknown contributing factors, such as the role of the microbiome in PFO-associated strokes, remain unclear. We analysed saliva metagenomes to study the differences in the oral microbiome between young-onset CIS patients with clinically relevant high-risk PFO (n = 52) and those without PFO (n = 52). Age- and sex-matched stroke-free controls (n = 16) with high-risk PFO were included for the comparison. Beta diversity was significantly different between patients and controls with high-risk PFO, but not between patients with and without high-risk PFO. The phylum Ascomycota and class Saccharomycetes were significantly more abundant in patients with high-risk PFO than in those without high-risk PFO. Additionally, the abundance of Lactococcus, including Lactococcus raffinolactis and L. cremoris, was higher in controls with high-risk PFO than in patients with high-risk PFO. These findings highlight that oral dysbiosis and high-risk PFO may form a critical but under-recognized combination in the aetiology of CIS. Future research should focus on elucidating the precise mechanisms of these interactions and developing targeted interventions.}, }
@article {pmid40185271, year = {2025}, author = {Guajardo-Leiva, S and Díez, B and Rojas-Fuentes, C and Chnaiderman, J and Castro-Nallar, E and Catril, V and Ampuero, M and Gaggero, A}, title = {From sewage to genomes: Expanding our understanding of the urban and semi-urban wastewater RNA virome.}, journal = {Environmental research}, volume = {276}, number = {}, pages = {121509}, doi = {10.1016/j.envres.2025.121509}, pmid = {40185271}, issn = {1096-0953}, mesh = {*Wastewater/virology ; *Virome ; *Sewage/virology ; *RNA Viruses/genetics ; Chile ; *Genome, Viral ; Phylogeny ; Environmental Monitoring ; RNA, Viral ; Metagenomics ; }, abstract = {Wastewater is a hotspot for viral diversity, harboring various microbial, plant, and animal viruses, including those that infect humans. However, the dynamics, resilience, and ecological roles of viral communities during treatment are largely unknown. In this study, we explored RNA virus ecogenomics using metagenomics from influent and effluent samples across three wastewater catchment areas in Chile, with a population of 7.05 million equivalent inhabitants. We identified 14,212 RNA-dependent RNA polymerase (RdRP)-coding sequences from the Orthornavirae kingdom, clustering into 4989 viral species. Using extensive databases of 14,150 family-level representative sequences, we classified 90 % of our sequences at the family level. Our analysis revealed that treatment reduced viral richness and evenness (Shannon index), but phylogenetic diversity remained unchanged. Effluents showed lower richness and evenness than influents with similar phylogenetic diversity. Species turnover, influenced by catchment area and treatment, accounted for 54 % of sample dissimilarities (Weighted Unifrac). Biomarker analysis indicated that families like Astroviridae and Fiersviridae were more abundant in influents, while Reoviridae and Virgaviridae dominated effluents. This suggests that viral resistance to treatment varies and cannot be solely attributed to genome type, size, or morphology. We traced viral genomes through time and space, identifying sequences like the Pepper Mild Mottle Virus (PMMoV) from the Virgaviridae family over large distances and periods, highlighting its wastewater marker potential. High concentrations of human pathogens, such as Rotavirus (Reoviridae) and Human Astrovirus (Astroviridae), were found in both influents and effluents, stressing the need for continuous monitoring, especially for treated wastewater reuse.}, }
@article {pmid40185186, year = {2025}, author = {Liu, Y and Pei, Y and Wang, H and Yang, Z}, title = {Lead promoted bile acid deconjugation by modulating gut bacteria encoding bile salt hydrolase (BSH) in Rana chensinensis tadpoles.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {373}, number = {}, pages = {126187}, doi = {10.1016/j.envpol.2025.126187}, pmid = {40185186}, issn = {1873-6424}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Bile Acids and Salts/metabolism ; Larva/drug effects/metabolism ; *Amidohydrolases/metabolism ; *Lead/toxicity ; *Ranidae ; Bacteria ; }, abstract = {Bile salt hydrolase (BSH) is produced by gut bacteria and is responsible for deconjugating amino acids from the aliphatic side chains of conjugated bile acids (BAs), initiating the critical first step in BAs metabolism. Lead (Pb) is known to cause gut microbial dysbiosis, but whether it affects BAs profiles by reshaping the gut microbiota remains elusive. Here, using targeted BAs metabolomics and metagenomics sequencing, we found that 200 μg/L Pb treatment led to a significant increase in the abundance of BSH-producing microbiota (e.g., Eubacterium and Yersinia), thus promoting the deconjugation of taurocholic acid (TCA) and taurochenodeoxycholic acid (TCDCA). Consequently, the accumulation of relatively hydrophobic BAs cholic acid (CA) and chenodeoxycholic acid (CDCA) may cause damage to enterocytes (e.g., reduced microvilli and enterocyte heights), which attenuated tadpole digestion and ultimately led to significant reductions in morphological parameters. The inhibition of tadpole growth by Pb toxicity may negatively affect their survival and even increase their risk of death. Overall, these results revealed for the first time the toxicological mechanism by which Pb reshapes the gut microbiota and thus disrupts the BAs profile, shedding new insights into the detrimental effects of Pb toxicity on amphibian growth.}, }
@article {pmid40184632, year = {2025}, author = {Huang, Y and Mao, X and Zheng, X and Zhao, Y and Wang, D and Wang, M and Chen, Y and Liu, L and Wang, Y and Polz, MF and Zhang, T}, title = {Longitudinal dynamics and cross-domain interactions of eukaryotic populations in wastewater treatment plants.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40184632}, issn = {1751-7370}, support = {17212124//Hong Kong GRF/ ; }, mesh = {*Eukaryota/classification/genetics/isolation &amp; purification ; *Sewage/microbiology/virology/parasitology ; *Wastewater/microbiology ; Hong Kong ; Metagenomics ; Animals ; Biodiversity ; Phylogeny ; }, abstract = {Activated sludge is a large reservoir of novel microorganisms and microbial genetic diversity. While much attention has been given to the profile and functions of prokaryotes, the eukaryotic diversity remains largely unexplored. In this study, we analysed longitudinal activated sludge samples spanning 13 years from the largest secondary wastewater treatment plants in Hong Kong, unveiling a wealth of eukaryotic taxa and 681 856 non-redundant protein-coding genes, the majority (416 044) of which appeared novel. Ciliophora was the most dominant phylum with a significant increase after a transient intervention (bleaching event). Our metagenomic analysis reveals close linkage and covariation of eukaryotes, prokaryotes, and prokaryotic viruses (phages), indicating common responses to environmental changes such as transient intervention and intermittent fluctuations. Furthermore, high-resolution cross-domain relationships were interpreted by S-map, demonstrating a predatory role of Arthropoda, Ascomycota, Mucoromycota, and Rotifera. This high-resolution profile of microbial dynamics expands our knowledge on yet-to-be-cultured populations and their cross-domain interactions and highlights the ecological importance of eukaryotes in the activated sludge ecosystem.}, }
@article {pmid40181255, year = {2025}, author = {Mohammadzadeh, R and Mahnert, A and Shinde, T and Kumpitsch, C and Weinberger, V and Schmidt, H and Moissl-Eichinger, C}, title = {Age-related dynamics of predominant methanogenic archaea in the human gut microbiome.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {193}, pmid = {40181255}, issn = {1471-2180}, support = {P 32697//Austrian Science Fund/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Middle Aged ; Adult ; Aged ; *Archaea/classification/genetics/metabolism/isolation &amp; purification ; *Methane/metabolism ; Feces/microbiology ; Aged, 80 and over ; Young Adult ; Female ; Male ; *Aging ; Age Factors ; Methanobrevibacter/genetics ; Metagenomics ; Phylogeny ; Bacteria/classification/genetics/metabolism ; }, abstract = {BACKGROUND: The reciprocal relationship between aging and alterations in the gut microbiota is a subject of ongoing research. While the role of bacteria in the gut microbiome is well-documented, specific changes in the composition of methanogens during extreme aging and the impact of high methane production in general on health remain unclear. This study was designed to explore the association of predominant methanogenic archaea within the human gut and aging.<br><br>METHODS: Shotgun metagenomic data from the stool samples of young adults (n&#x2009;=&#x2009;127, Age: 19-59 y), older adults (n&#x2009;=&#x2009;86, Age: 60-99 y), and centenarians (n&#x2009;=&#x2009;34, age: 100-109 years) were analyzed.<br><br>RESULTS: Our findings reveal a compelling link between age and the prevalence of high methanogen phenotype, while overall archaeal diversity diminishes. Surprisingly, the archaeal composition of methanogens in the microbiome of centenarians appears more akin to that of younger adults, showing an increase in Methanobrevibacter smithii, rather than Candidatus Methanobrevibacter intestini. Remarkably, Ca. M. intestini emerged as a central player in the stability of the archaea-bacteria network in adults, paving the way for M. smithii in older adults and centenarians. Notably, centenarians exhibit a highly complex and stable network of these two methanogens with other bacteria. The mutual exclusion between Lachnospiraceae and these methanogens throughout all age groups suggests that these archaeal communities may compensate for the age-related drop in Lachnospiraceae by co-occurring with Oscillospiraceae.<br><br>CONCLUSIONS: This study underscores the dynamics of archaeal microbiome in human physiology and aging. It highlights age-related shifts in methanogen composition, emphasizing the significance of both M. smithii and Ca. M. intestini and their partnership with butyrate-producing bacteria for potential enhanced health.}, }
@article {pmid40180917, year = {2025}, author = {Schmitz, MA and Dimonaco, NJ and Clavel, T and Hitch, TCA}, title = {Lineage-specific microbial protein prediction enables large-scale exploration of protein ecology within the human gut.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {3204}, pmid = {40180917}, issn = {2041-1723}, support = {460129525//Massachusetts Department of Fish and Game (DFG)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Metagenome/genetics ; *Metagenomics/methods ; *Bacterial Proteins/genetics/metabolism ; *Bacteria/genetics/classification/metabolism ; Phylogeny ; Computational Biology/methods ; }, abstract = {Microbes use a range of genetic codes and gene structures, yet these are often ignored during metagenomic analysis. This causes spurious protein predictions, preventing functional assignment which limits our understanding of ecosystems. To resolve this, we developed a lineage-specific gene prediction approach that uses the correct genetic code based on the taxonomic assignment of genetic fragments, removes incomplete protein predictions, and optimises prediction of small proteins. Applied to 9634 metagenomes and 3594 genomes from the human gut, this approach increased the landscape of captured expressed microbial proteins by 78.9%, including previously hidden functional groups. Optimised small protein prediction captured 3,772,658 small protein clusters, which form an improved microbial protein catalogue of the human gut (MiProGut). To enable the ecological study of a protein's prevalence and association with host parameters, we developed InvestiGUT, a tool which integrates both the protein sequences and sample metadata. Accurate prediction of proteins is critical to providing a functional understanding of microbiomes, enhancing our ability to study interactions between microbes and hosts.}, }
@article {pmid40180909, year = {2025}, author = {Bedarf, JR and Romano, S and Heinzmann, SS and Duncan, A and Traka, MH and Ng, D and Segovia-Lizano, D and Simon, MC and Narbad, A and Wüllner, U and Hildebrand, F}, title = {A prebiotic dietary pilot intervention restores faecal metabolites and may be neuroprotective in Parkinson's Disease.}, journal = {NPJ Parkinson's disease}, volume = {11}, number = {1}, pages = {66}, pmid = {40180909}, issn = {2373-8057}, support = {BB/CCG2260/1//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; }, abstract = {Current treatment of Parkinson's Disease (PD) remains symptomatic, and disease-modifying approaches are urgently required. A promising approach is to modify intestinal microbiota and key metabolites of bacterial fermentation: short-chain fatty acids (SCFA), which are decreased in PD. A prospective, controlled pilot study (DRKS00034528) was conducted on 11 couples (PD patient plus healthy spouse as control (CO)). Participants followed a 4-week diet rich in dietary fibre, including intake of the prebiotic Lactulose. Gut metagenomes, faecal and urinary metabolites, and clinical characteristics were assessed. The dietary intervention significantly augmented faecal SCFA and increased Bifidobacteria spp., reducing PD-related gastrointestinal symptoms. The pre-existing bacterial dysbiosis in PD (depletion of Blautia, Dorea, Erysipelatoclostridium) persisted. Bacterial metabolite composition in faeces and urine positively changed with the intervention: Brain-relevant gut metabolic functions involved in neuroprotective and antioxidant pathways, including S-adenosyl methionine, glutathione, and inositol, improved in PD. These promising results warrant further investigation in larger cohorts.}, }
@article {pmid40180172, year = {2025}, author = {Li, VW and Dong, TS and Funes, D and Hernandez, L and Kushnir, NR and Nair, D and Jacobs, JP and Reddy, ST and Mayer, EA and Chang, L and Meriwether, D}, title = {Mass spectrometric profiling of primary estrogens and estrogen metabolites in human stool and plasma partially elucidates the role of the gut microbiome in estrogen recycling.}, journal = {Molecular and cellular endocrinology}, volume = {603}, number = {}, pages = {112534}, doi = {10.1016/j.mce.2025.112534}, pmid = {40180172}, issn = {1872-8057}, mesh = {Humans ; Female ; *Estrogens/metabolism/blood ; Male ; *Feces/chemistry/microbiology ; *Gastrointestinal Microbiome ; Adult ; Middle Aged ; Tandem Mass Spectrometry ; Chromatography, Liquid ; Young Adult ; }, abstract = {Primary estrogens and estrogen metabolites are commonly measured in human plasma and serum, but there exist almost no recent reports for human stool. This knowledge gap limits our understanding of the relationships between systemic and gut estrogens. We developed a highly sensitive liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) method to determine, in human plasma and stool, the free and conjugated levels of estrone, estradiol, and estriol together with their additional hydroxyestrogen and methoxyestrogen metabolites. We investigated human stool and plasma estrogens in healthy control men; in follicular and luteal phase premenopausal women; and in postmenopausal women. Most estrogens were present in plasma and stool of all groups, while the plasma and stool levels of hydroxyestrogen and methoxyestrogen metabolites but not estrone were correlated. In stool, estrogens were higher in premenopausal women, with estrogens increasing across the menstrual cycle. We combined these LC-MS/MS measures with shotgun metagenomic sequencing of the stool microbiomes. Estrogen deconjugation enzyme gene copy numbers (β-glucuronidase and arylsulfatase) were higher in premenopausal women; while the gene copy number of β-glucuronidase + arylsulfatase, but not β-glucuronidase alone, correlated with deconjugated stool estrogens in all groups. Moreover, β-glucuronidase + arylsulfatase gene copy numbers correlated with combined plasma estrogens in men and with individual plasma estrogen metabolites in men and premenopausal women. These results support the hypothesis that gut microbial β-glucuronidase and arylsulfatase control the deconjugation of gut estrogens while modulating systemic levels through the uptake and recirculation of these deconjugated estrogens. The intestine may thus constitute an important additional compartment in estrogen physiology.}, }
@article {pmid40179570, year = {2025}, author = {Zhang, P and Liu, Y and Xu, M and Zhang, J and Xia, J and Shi, Y and Wang, J and Han, B and Feng, G}, title = {Gut microbiota characteristics and prognostic value in patients with aneurysmal subarachnoid hemorrhage: A clinical study.}, journal = {Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia}, volume = {136}, number = {}, pages = {111200}, doi = {10.1016/j.jocn.2025.111200}, pmid = {40179570}, issn = {1532-2653}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Subarachnoid Hemorrhage/microbiology/diagnosis ; Male ; Female ; Middle Aged ; Prognosis ; Adult ; Aged ; Feces/microbiology ; }, abstract = {BACKGROUND: This study aims to explore the characteristics of gut microbiota in the aneurysmal subarachnoid hemorrhage (aSAH) group and the healthy control group, as well as in the good prognosis group and the poor prognosis group. It also investigates the relationship between the severity of aSAH and gut microbiota, and the predictive value of gut microbiota for the prognosis outcome of patients with aSAH.<br><br>METHODS: Stool samples from 22 patients with aSAH and 11 healthy controls were subjected to metagenomic sequencing, and species annotations were obtained through the taxonomic information database corresponding to the NR database. The characteristics of the gut microbiota in the aSAH group versus the healthy control group, and the good prognosis group versus the poor prognosis group were analyzed.The correlations between differential microbiota and clinical hematology markers between the aSAH and control groups and between gut microbiota and aSAH severity were analyzed. The prognosis of patients with aSAH after three months was assessed. Finally, gut microbiota with significant effects were screened for potential as biomarkers, and the predictive value of gut microbiota for different prognostic outcomes in patients with aSAH was explored.<br><br>RESULTS: Gut microbiota composition, diversity, and abundance differed significantly between patients in the aSAH group and the control group. Additionally, the composition, diversity, and abundance differed between patients with good and poor prognosis. Five dominant genera--Bacillus, Eggerthia, Hominisplanchenecus, Carnobacterium, and Bifidobacterium were identified as potential biomarkers for predicting aSAH outcomes.<br><br>CONCLUSION: Patients with aSAH have altered gut microbiota composition, structure, and diversity compared with the healthy population. These alterations may be potential biomarkers for aSAH diagnosis and outcome prediction.}, }
@article {pmid40178790, year = {2025}, author = {Yuan, J and Yang, J and Sun, Y and Meng, Y and He, Z and Zhang, W and Dang, L and Song, Y and Xu, K and Lv, N and Zhang, Z and Guo, P and Yin, H and Shi, W}, title = {An early microbial landscape: inspiring endeavor from the China Space Station Habitation Area Microbiome Program (CHAMP).}, journal = {Science China. Life sciences}, volume = {68}, number = {6}, pages = {1541-1554}, pmid = {40178790}, issn = {1869-1889}, mesh = {China ; *Spacecraft ; *Microbiota/genetics ; Humans ; *Space Flight ; *Bacteria/genetics/classification/isolation &amp; purification ; Metagenomics/methods ; Astronauts ; }, abstract = {China's progressing space program, as evidenced by the formal operation of the China Space Station (CSS), has provided great opportunities for various space missions. Since microbes can present potential risks to human health and the normal operation of spacecraft, the study on space-microorganisms in the CSS is always a matter of urgency. In addition, the knowledge on the interactions between microorganisms, astronauts, and spacecraft equipment will shed light on our understanding of life activities in space and a closed environment. Here, we present the first comprehensive report on the microbial communities aboard the CSS based on the results of the first two survey missions of the CSS Habitation Area Microbiome Program (CHAMP). By combining metagenomic and cultivation methods, we have discovered that, in the early stage of the CSS, microbial communities are dominated by human-associated microbes, with strikingly large differences in both composition and functional diversity compared to those found on the International Space Station (ISS). While the samples from two missions of CHAMP possessed substantial differences in microbial composition, no significant difference in functional diversity was found, although signs of accumulating antibiotic resistance were evident. Meanwhile, strong bacteria co-occurrence was noted within the station's microbiota. At the strain level, environmental isolates from the CSS exhibited numerous genomic mutations compared to those from the Assembly, Integration, and Test (AIT) center, potentially linked to the adaptation to the unique conditions of space. Besides, the intraspecies variation within four high-abundance species suggests possible propagation and residency effects between sampling sites. In summary, this study offers critical insights that not only advance our understanding of space microbiology but also lay the groundwork for effective microbial management in future long-term human space missions.}, }
@article {pmid40178526, year = {2025}, author = {Contreras-de la Rosa, PA and De la Torre-Zavala, S and O Connor-Sánchez, A and Prieto-Davó, A and Góngora-Castillo, EB}, title = {Exploring the microbial communities in coastal cenote and their hidden biotechnological potential.}, journal = {Microbial genomics}, volume = {11}, number = {4}, pages = {}, pmid = {40178526}, issn = {2057-5858}, mesh = {*Archaea/genetics/classification/metabolism/isolation &amp; purification ; *Bacteria/genetics/classification/metabolism ; Biotechnology ; Secondary Metabolism/genetics ; Metagenomics/methods ; *Geologic Sediments/microbiology ; Multigene Family ; Polyketide Synthases/genetics ; *Microbiota/genetics ; Phylogeny ; }, abstract = {Bacterial secondary metabolites are crucial bioactive compounds with significant therapeutic potential, playing key roles in ecological processes and the discovery of novel antimicrobial agents and natural products. Cenotes, as extreme environments, harbour untapped microbial diversity and hold an interesting potential as sources of novel secondary metabolites. While research has focused on the fauna and flora of cenotes, the study of their microbial communities and their biosynthetic capabilities remains limited. Advances in metagenomics and genome sequencing have greatly improved the capacity to explore these communities and their metabolites. In this study, we analysed the microbial diversity and biotechnological potential of micro-organisms inhabiting sediments from a coastal cenote. Metagenomic analyses revealed a rich diversity of bacterial and archaeal communities, containing several novel biosynthetic gene clusters (BGCs) linked to secondary metabolite production. Notably, polyketide synthase BGCs, including those encoding ladderanes and aryl-polyenes, were identified. Bioinformatics analyses of these pathways suggest the presence of compounds with potential industrial and pharmaceutical applications. These findings highlight the biotechnological value of cenotes as reservoirs of secondary metabolites. The study and conservation of these ecosystems are essential to facilitate the discovery of new bioactive compounds that could benefit various industries.}, }
@article {pmid40178319, year = {2025}, author = {Herzog, E and Ishida, K and Scherlach, K and Chen, X and Bartels, B and Niehs, SP and Cheaib, B and Panagiotou, G and Hertweck, C}, title = {Antibacterial Siderophores of Pandoraea Pathogens and Their Impact on the Diseased Lung Microbiota.}, journal = {Angewandte Chemie (International ed. in English)}, volume = {64}, number = {24}, pages = {e202505714}, pmid = {40178319}, issn = {1521-3773}, support = {239748522-SFB1127 ChemBioSys//Deutsche Forschungsgemeinschaft/ ; 390713860//Germany's Excellence Strategy/ ; //European Regional Development Fund/ ; //Ernst Jung Foundation/ ; }, mesh = {*Siderophores/pharmacology/chemistry/metabolism ; *Anti-Bacterial Agents/pharmacology/chemistry/metabolism ; Humans ; *Microbiota/drug effects ; *Lung/microbiology ; Microbial Sensitivity Tests ; *Burkholderiaceae/metabolism/chemistry/genetics ; Cystic Fibrosis/microbiology ; }, abstract = {Antibiotic-resistant bacteria of the genus Pandoraea, frequently acquired from the environment, are an emerging cause of opportunistic respiratory infections, especially in cystic fibrosis (CF) patients. However, their specialized metabolites, including niche and virulence factors, remained unknown. Through genome mining of environmental and clinical isolates of diverse Pandoraea species, we identified a highly conserved biosynthesis gene cluster (pan) that codes for a nonribosomal peptide synthetase (NRPS) assembling a new siderophore. Using bioinformatics-guided metabolic profiling of wild type and a targeted null mutant, we discovered the corresponding metabolites, pandorabactin A and B. Their structures and chelate (gallium) complexes were elucidated by a combination of chemical degradation, derivatization, NMR, and MS analysis. Metagenomics and bioinformatics of sputum samples of CF patients indicated that the presence of the pan gene locus correlates with the prevalence of specific bacteria in the lung microbiome. Bioassays and mass spectrometry imaging showed that pandorabactins have antibacterial activities against various lung pathogens (Pseudomonas, Mycobacterium, and Stenotrophomonas) through depleting iron in the competitors. Taken together, these findings offer first insight into niche factors of Pandoraea and indicate that pandorabactins shape the diseased lung microbiota through the competition for iron.}, }
@article {pmid40177842, year = {2025}, author = {Larnder, AH and Manges, AR and Murphy, RA}, title = {The estrobolome: Estrogen-metabolizing pathways of the gut microbiome and their relation to breast cancer.}, journal = {International journal of cancer}, volume = {157}, number = {4}, pages = {599-613}, pmid = {40177842}, issn = {1097-0215}, support = {/CAPMC/CIHR/Canada ; //Weston Family Foundation/ ; /CAPMC/CIHR/Canada ; }, mesh = {Humans ; *Breast Neoplasms/metabolism/microbiology/pathology ; *Gastrointestinal Microbiome/physiology ; Female ; *Estrogens/metabolism ; Case-Control Studies ; }, abstract = {Increasing evidence links the gut microbiome to carcinogenesis. Disruptions in estrogen regulation by the estrobolome-gut microbiota with estrogen-related functions-may promote breast cancer. However, precise information on estrobolome targets and their underlying mechanisms is limited. This review identifies relevant targets for measuring the estrobolome, focusing on enzymes and microbial taxa involved in processing estrogens, precursors, metabolites, and phytoestrogens, to facilitate the exploration of potential links to breast cancer. Evidence from breast cancer case-control studies is synthesized to assess alignment with these targets, highlight gaps in the evidence, and suggest new paths forward. Findings from case-control studies were heterogeneous and showed limited alignment with estrobolome targets, with only Escherichia coli and Roseburia inulinivorans identified as differentially abundant and functionally relevant between cases and controls. The lack of compelling evidence for estrobolome-specific mechanisms may reflect measurement challenges or may suggest that broader ecological changes in the microbiome, which influence a network of interacting mechanisms, are more influential for carcinogenesis. To clarify the estrobolome's role in breast cancer, future research should use advanced sequencing techniques and methods such as metabolomics and transcriptomics, while considering clinical and behavioral factors that may modify estrobolome mechanisms.}, }
@article {pmid40177264, year = {2025}, author = {Kananen, K and Veseli, I and Quiles Pérez, CJ and Miller, SE and Eren, AM and Bradley, PH}, title = {Adaptive adjustment of profile HMM significance thresholds improves functional and metabolic insights into microbial genomes.}, journal = {Bioinformatics advances}, volume = {5}, number = {1}, pages = {vbaf039}, pmid = {40177264}, issn = {2635-0041}, abstract = {MOTIVATION: Gene function annotation in microbial genomes and metagenomes is a fundamental in silico first step toward understanding metabolic potential and determinants of fitness. The Kyoto Encyclopedia of Genes and Genomes publishes a curated list of profile hidden Markov models to identify orthologous gene families (KOfams) with roles in metabolism. However, the computational tools that rely upon KOfams yield different annotations for the same set of genomes, leading to different downstream biological inferences.<br><br>RESULTS: Here, we apply three open-source software tools that can annotate KOfams to genomes of phylogenetically diverse bacterial families from host-associated and free-living biomes. We use multiple computational approaches to benchmark these methods and investigate individual case studies where they differ. Our results show that despite their fundamental similarities, these methods have different annotation rates and quality. In particular, a method that adaptively tunes sequence similarity thresholds substantially improves sensitivity while maintaining high accuracy. We observe particularly large improvements for protein families with few reference sequences, or when annotating genomes from nonmodel organisms (such as gut-dwelling Lachnospiraceae). Our findings show that small improvements in annotation workflows can maximize the utility of existing databases and meaningfully improve in silico characterizations of microbial metabolism.<br><br>Anvi'o is available at https://anvio.org under the GNU GPL license. Scripts and workflow are available at https://github.com/pbradleylab/2023-anvio-comparison under the MIT license.}, }
@article {pmid40176190, year = {2025}, author = {Xing, J and Niu, T and Yu, T and Zou, B and Shi, C and Wang, Y and Fan, S and Li, M and Bao, M and Sun, Y and Gao, K and Qiu, J and Zhang, D and Wang, N and Jiang, Y and Huang, H and Cao, X and Zeng, Y and Wang, J and Zhang, S and Hu, J and Zhang, D and Sun, W and Yang, G and Yang, W and Wang, C}, title = {Faecalibacterium prausnitzii-derived outer membrane vesicles reprogram gut microbiota metabolism to alleviate Porcine Epidemic Diarrhea Virus infection.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {90}, pmid = {40176190}, issn = {2049-2618}, support = {U21A20261//National Natural Science Foundation of China/ ; }, mesh = {Animals ; Swine ; *Porcine epidemic diarrhea virus/physiology ; *Gastrointestinal Microbiome ; *Swine Diseases/virology/microbiology ; *Faecalibacterium prausnitzii/metabolism/physiology ; *Coronavirus Infections/veterinary/virology/microbiology ; Probiotics/administration &amp; dosage ; Feces/microbiology ; *Bacterial Outer Membrane/metabolism ; }, abstract = {BACKGROUND: The Porcine Epidemic Diarrhea Virus (PEDV) is one of the major challenges facing the global pig farming industry, and vaccines and treatments have proven difficult in controlling its spread. Faecalibacterium prausnitzii (F.prausnitzii), a key commensal bacterium in the gut, has been recognized as a promising candidate for next-generation probiotics due to its potential wide-ranging health benefits. A decrease in F.prausnitzii abundance has been associated with certain viral infections, suggesting its potential application in preventing intestinal viral infections. In this study, we utilized a piglet model to examine the potential role of F.prausnitzii in PEDV infections.<br><br>RESULTS: A piglet model of PEDV infection was established and supplemented with F.prausnitzii, revealing that F.prausnitzii mitigated PEDV infection. Further studies found that outer membrane vesicles (OMVs) are the main functional components of F.prausnitzii, and proteomics, untargeted metabolomics, and small RNA-seq were used to analyze the composition of OMVs. Exhaustion of the gut microbiota demonstrated that the function of Fp. OMVs relies on the presence of the gut microbiota. Additionally, metagenomic analysis indicated that Fp. OMVs altered the gut microbiota composition, enhancing the abundance of Faecalibacterium prausnitzii, Prevotellamassilia timonensis, and Limosilactobacillus reuteri. Untargeted metabolomics analysis showed that Fp. OMVs increased phosphatidylcholine (PC) levels, with PC identified as a key metabolite in alleviating PEDV infection. Single-cell sequencing revealed that PC altered the relative abundance of intestinal cells, increased the number of intestinal epithelial cells, and reduced necroptosis in target cells. PC treatment in infected IPEC-J2 and Vero cells alleviated necroptosis and reduced the activation of the RIPK1-RIPK3-MLKL signaling axis, thereby improving PEDV infection.<br><br>CONCLUSION: F.prausnitzii and its OMVs play a critical role in mitigating PEDV infections. These findings provide a promising strategy to ameliorate PEDV infection in piglets. Video Abstract.}, }
@article {pmid40176137, year = {2025}, author = {Sommer, F and Bernardes, JP and Best, L and Sommer, N and Hamm, J and Messner, B and López-Agudelo, VA and Fazio, A and Marinos, G and Kadibalban, AS and Ito, G and Falk-Paulsen, M and Kaleta, C and Rosenstiel, P}, title = {Life-long microbiome rejuvenation improves intestinal barrier function and inflammaging in mice.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {91}, pmid = {40176137}, issn = {2049-2618}, support = {SO1141/10-1//Deutsche Forschungsgemeinschaft/ ; CRC1182//Deutsche Forschungsgemeinschaft/ ; miTARGET//Deutsche Forschungsgemeinschaft/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; Mice ; RNA, Ribosomal, 16S/genetics ; *Fecal Microbiota Transplantation ; *Aging/physiology ; Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; *Intestinal Mucosa/microbiology/metabolism ; *Inflammation/microbiology ; Mice, Inbred C57BL ; *Rejuvenation ; Permeability ; *Intestines/microbiology ; Metagenomics ; Intestinal Barrier Function ; }, abstract = {BACKGROUND: Alterations in the composition and function of the intestinal microbiota have been observed in organismal aging across a broad spectrum of animal phyla. Recent findings, which have been derived mostly in simple animal models, have even established a causal relationship between age-related microbial shifts and lifespan, suggesting microbiota-directed interventions as a potential tool to decelerate aging processes. To test whether a life-long microbiome rejuvenation strategy could delay or even prevent aging in non-ruminant mammals, we performed recurrent fecal microbial transfer (FMT) in mice throughout life. Transfer material was either derived from 8-week-old mice (young microbiome, yMB) or from animals of the same age as the recipients (isochronic microbiome, iMB) as control. Motor coordination and strength were analyzed by rotarod and grip strength tests, intestinal barrier function by serum LAL assay, transcriptional responses by single-cell RNA sequencing, and fecal microbial community properties by 16S rRNA gene profiling and metagenomics.<br><br>RESULTS: Colonization with yMB improved coordination and intestinal permeability compared to iMB. yMB encoded fewer pro-inflammatory factors and altered metabolic pathways favoring oxidative phosphorylation. Ecological interactions among bacteria in yMB were more antagonistic than in iMB implying more stable microbiome communities. Single-cell RNA sequencing analysis of intestinal mucosa revealed a salient shift of cellular phenotypes in the yMB group with markedly increased ATP synthesis and mitochondrial pathways as well as a decrease of age-dependent mesenchymal hallmark transcripts in enterocytes and TA cells, but reduced inflammatory signaling in macrophages.<br><br>CONCLUSIONS: Taken together, we demonstrate that life-long and repeated transfer of microbiota material from young mice improved age-related processes including coordinative ability (rotarod), intestinal permeability, and both metabolic and inflammatory profiles mainly of macrophages but also of other immune cells. Video Abstract.}, }
@article {pmid40175903, year = {2025}, author = {Cao, L and Sun, H and Xu, Z and Xu, X and Shi, G and Zhang, J and Liang, C and Li, T and Liu, C and Wang, M and Tian, S and Li, E}, title = {Metagenomic and physicochemical profiling reveal microbial functions in pit mud for Jiang-Nong Jianxiang Baijiu fermentation.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {190}, pmid = {40175903}, issn = {1471-2180}, mesh = {*Fermentation ; *Metagenomics/methods ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; China ; Food Microbiology ; *Metagenome ; Microbiota ; *Alcoholic Beverages/microbiology ; }, abstract = {BACKGROUND: The unique flavour and quality of Baijiu, a treasure of traditional Chinese culture, has attracted increasing attention. The pit mud is a key component for forming the unique flavour styles of different Baijiu brands. Hence, conducting in-depth research on the microbial colonies present in pit mud is paramount for enhancing the intricate bouquets of Baijiu flavours.<br><br>RESULTS: This study conducts a comprehensive metagenomic examination of the microbial ecosystem within Chinese&#xa0;Jiang-Nong Jianxiang Baijiu fermentation pit mud. Within the pit mud walls, six prominent species, each accounting for more than 1% of the average relative abundance, emerged as key contributors: Lentilactobacillus buchneri, Secundilactobacillus silagincola, Clostridium tyrobutyricum, Lentilactobacillus parafarraginis, Ligilactobacillus acidipiscis, and Lactobacillus acetotolerans. Conversely, at the pit mud bases, four species surpassed this threshold: Petrimonas sp. IBARAKI, Methanosarcina barkeri, Methanofollis ethanolicus, and Proteiniphilum propionicum. Notably, the abundance of Clostridium in the pit mud walls impart superior saccharifying capabilities compared with those at the bases. The consistently high relative abundance of enzymes belonging to the glycoside hydrolases (GHs), glycosyltransferases (GTs), and carbohydrate-binding modules (CBMs) across both the pit mud walls and the bases highlight their importance in fermentation.<br><br>CONCLUSIONS: The microbial composition analysis results underscore the important role of pit mud microorganisms in facilitating starch saccharification, ethyl caproate and ethyl butyrate production, among other aromatic compounds. Microbes residing in the pit mud walls may be exhibited a heightened propensity for lactic acid generation, whereas those inhabiting the bases may be displayed a stronger inclination towards caproic acid production. This research serves as a valuable reference for future endeavours aimed at harnessing microbial resources to refine and optimize Baijiu fermentation methodologies.}, }
@article {pmid40175854, year = {2025}, author = {Abuzahrah, SS}, title = {Exploring the microorganisms biodiversity associated with sponge species in the red sea through 18S ribosomal RNA gene sequencing.}, journal = {AMB Express}, volume = {15}, number = {1}, pages = {60}, pmid = {40175854}, issn = {2191-0855}, abstract = {Around the world, sponges play a significant role in marine ecosystems, and a wide variety of sponge species can be found in the coast of Red Sea of Saudi Arabia. The unique environmental conditions of the Red Sea, including warm, oligotrophic water and high salinity, have encouraged the growth of abundant sponge fauna. Our study aims to investigate the biodiversity, taxonomic composition, and phylogenetic relationships of eukaryotic organisms linked with sponges in the Red Sea off the coast of Saudi Arabia and infer the possible ecological roles and functional contributions of the identified eukaryotic taxa to sponge health and ecosystem functioning. The study investigated the microbial diversity, focusing on the genera Hyalosynedra sp., Navicula sp., Papiliocellulus sp., Psammodictyon sp., Pynococcus sp., Ostreococcus sp., Micromonas sp., and other unclassified species. Our metagenomic analysis and phylogenetic evaluation revealed a deep and diverse microbial community, with each genus performing significant ecological roles, including nutrient cycling, primary production, and contributing to marine food networks. Moreover, these genera display promising biotechnological prospects, including uses in bioremediation, biofuel production, and the synthesis of high-value biomolecules. Comparative analysis with other marine regions has focused on both the similarities and unique aspects of the Red Sea microbial community, which are influenced by its distinct environmental conditions. The gained findings contribute to a deeper understanding of the ecological dynamics in the Red Sea and open new avenues for biotechnological exploration in marine ecosystems.}, }
@article {pmid40175737, year = {2025}, author = {Sawhney, SS and Thänert, R and Thänert, A and Hall-Moore, C and Ndao, IM and Mahmud, B and Warner, BB and Tarr, PI and Dantas, G}, title = {Gut microbiome evolution from infancy to 8 years of age.}, journal = {Nature medicine}, volume = {31}, number = {6}, pages = {2004-2015}, pmid = {40175737}, issn = {1546-170X}, support = {R01AI155893//U.S. Department of Health &amp; Human Services | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; R01HD092414//U.S. Department of Health &amp; Human Services | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)/ ; T32GM007067//U.S. Department of Health &amp; Human Services | NIH | National Institute of General Medical Sciences (NIGMS)/ ; MD-FR-2013-292//Children's Discovery Institute (CDI)/ ; 5P30 DK052574//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Infant ; Female ; Feces/microbiology ; Child ; Child, Preschool ; Male ; Infant, Newborn ; Metagenome/genetics ; Bacteria/genetics/classification ; }, abstract = {The human gut microbiome is most dynamic in early life. Although sweeping changes in taxonomic architecture are well described, it remains unknown how, and to what extent, individual strains colonize and persist and how selective pressures define their genomic architecture. In this study, we combined shotgun sequencing of 1,203 stool samples from 26 mothers and their twins (52 infants), sampled from childbirth to 8 years after birth, with culture-enhanced, deep short-read and long-read stool sequencing from a subset of 10 twins (20 infants) to define transmission, persistence and evolutionary trajectories of gut species from infancy to middle childhood. We constructed 3,995 strain-resolved metagenome-assembled genomes across 399 taxa, and we found that 27.4% persist within individuals. We identified 726 strains shared within families, with Bacteroidales, Oscillospiraceae and Lachnospiraceae, but not Bifidobacteriaceae, vertically transferred. Lastly, we identified weaning as a critical inflection point that accelerates bacterial mutation rates and separates functional profiles of genes accruing mutations.}, }
@article {pmid40175647, year = {2025}, author = {Ahn, JS and Kim, S and Han, EJ and Hong, ST and Chung, HJ}, title = {Increasing spatial working memory in mice with Akkermansia muciniphila.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {546}, pmid = {40175647}, issn = {2399-3642}, support = {C512230//Korea Basic Science Institute (KBSI)/ ; RS-2023-00224099//National Research Foundation of Korea (NRF)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; Mice, Inbred C57BL ; *Fecal Microbiota Transplantation ; *Memory, Short-Term/physiology ; Male ; *Spatial Memory/physiology ; Akkermansia ; Humans ; Verrucomicrobia ; Feces/microbiology ; Brain-Derived Neurotrophic Factor/metabolism ; }, abstract = {Recent research has shown the gut microbiome's impact on memory, yet limitations hinder the identification of specific microbes linked to cognitive function. We measured spatial working memory in individual mice before and after fecal microbiota transplantation (FMT) to develop a targeted analysis that identifies memory-associated strains while minimizing host genetic effects. Transplantation of human fecal into C57BL/6 mice yielded varied outcomes: some mice showed significant improvements while others had negligible changes, indicating that these changes are due to differences in FMT colonization. Metagenomic analysis, stratified by memory performance, revealed a positive correlation between the abundance of Akkermansia muciniphila and improved memory. Moreover, administering two A. muciniphila strains, GMB 0476 and GMB 2066, to wild-type mice elevated spatial working memory via BDNF activation. Our findings indicate that specific gut microbes, particularly A. muciniphila, may modulate memory and represent potential targets for therapeutic intervention in cognitive enhancement.}, }
@article {pmid40175554, year = {2025}, author = {Ryan, FJ and Clarke, M and Lynn, MA and Benson, SC and McAlister, S and Giles, LC and Choo, JM and Rossouw, C and Ng, YY and Semchenko, EA and Richard, A and Leong, LEX and Taylor, SL and Blake, SJ and Mugabushaka, JI and Walker, M and Wesselingh, SL and Licciardi, PV and Seib, KL and Tumes, DJ and Richmond, P and Rogers, GB and Marshall, HS and Lynn, DJ}, title = {Bifidobacteria support optimal infant vaccine responses.}, journal = {Nature}, volume = {641}, number = {8062}, pages = {456-464}, pmid = {40175554}, issn = {1476-4687}, mesh = {*Bifidobacterium/immunology/physiology/drug effects/isolation &amp; purification ; Mice ; Infant ; Animals ; Humans ; Female ; *Pneumococcal Vaccines/immunology ; Infant, Newborn ; *Anti-Bacterial Agents/adverse effects/pharmacology ; Feces/microbiology ; Male ; Haemophilus Vaccines/immunology ; *Immunogenicity, Vaccine/immunology/drug effects ; Gastrointestinal Microbiome/drug effects/immunology ; Germ-Free Life ; Prospective Studies ; Probiotics/administration &amp; dosage ; Vaccines, Conjugate/immunology ; Vaccination ; Antibodies, Bacterial/immunology ; }, abstract = {Accumulating evidence indicates that antibiotic exposure may lead to impaired vaccine responses[1-4]; however, the mechanisms underlying this association remain poorly understood. Here we prospectively followed 191 healthy, vaginally born, term infants from birth to 15 months, using a systems vaccinology approach to assess the effects of antibiotic exposure on immune responses to vaccination. Exposure to direct neonatal but not intrapartum antibiotics was associated with significantly lower antibody titres against various polysaccharides in the 13-valent pneumococcal conjugate vaccine and the Haemophilus influenzae type b polyribosylribitol phosphate and diphtheria toxoid antigens in the combined 6-in-1 Infanrix Hexa vaccine at 7 months of age. Blood from infants exposed to neonatal antibiotics had an inflammatory transcriptional profile before vaccination; in addition, faecal metagenomics showed reduced abundance of Bifidobacterium species in these infants at the time of vaccination, which was correlated with reduced vaccine antibody titres 6 months later. In preclinical models, responses to the 13-valent pneumococcal conjugate vaccine were strongly dependent on an intact microbiota but could be restored in germ-free mice by administering a consortium of Bifidobacterium species or a probiotic already widely used in neonatal units. Our data suggest that microbiota-targeted interventions could mitigate the detrimental effects of early-life antibiotics on vaccine immunogenicity.}, }
@article {pmid40175313, year = {2025}, author = {Fortin, SG and Uhlig, K and Hale, RC and Song, B}, title = {Microplastic biofilms as potential hotspots for plastic biodegradation and nitrogen cycling: a metagenomic perspective.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40175313}, issn = {1574-6941}, support = {//Virginia Water Resources Research Center/ ; 1737258//National Science Foundation/ ; }, mesh = {*Biofilms/growth &amp; development ; *Microplastics/metabolism ; Biodegradation, Environmental ; *Nitrogen Cycle ; *Bacteria/genetics/metabolism/classification ; Metagenomics ; *Plastics/metabolism ; Metagenome ; Nitrification ; Microbiota ; Water Pollutants, Chemical/metabolism ; Petroleum/metabolism ; Polyesters ; }, abstract = {Microplastics are an emerging contaminant worldwide, with the potential to impact organisms and facilitate the sorption and release of chemicals. Additionally, they create a novel habitat for microbial communities, forming biofilms known as the plastisphere. While the plastisphere has been studied in select aquatic environments, those in estuarine ecosystems merit additional attention due to their proximity to plastic debris sources. Additionally, the role plastisphere communities play in nutrient cycling has rarely been examined. This study used metagenomic analysis to investigate the taxonomic composition and functional genes of developing plastisphere communities living on petroleum-based (polyethylene and polyvinyl chloride) and biopolymer-based (polylactic acid) substrates. Isolated metagenome-assembled genomes (MAGs) showed plastisphere communities have the genes necessary to perform nitrification and denitrification and degrade petroleum and biopolymer-based plastics. The functions of these plastispheres have implications for estuarine nitrogen cycling and provide a possible explanation for the plastisphere microbes' competitiveness in biofilm environments. Overall, microplastics in the estuarine system provide a novel habitat for microbial communities and associated nitrogen cycling, facilitating the growth of microbes with plastic-degrading capabilities.}, }
@article {pmid40174744, year = {2025}, author = {Liu, M and Wang, S and Zhou, H and Liu, H and Huang, D and Liu, L and Li, Q and Chen, H and Lei, Y and Jin, LN and Zhang, W}, title = {Thermal environment driving specific microbial species to form the visible biofilms on the UNESCO World Heritage Dazu Rock Carvings.}, journal = {Environmental research}, volume = {276}, number = {}, pages = {121510}, doi = {10.1016/j.envres.2025.121510}, pmid = {40174744}, issn = {1096-0953}, mesh = {*Biofilms/growth &amp; development ; Bacteria/classification ; Fungi ; *Microbiota ; Temperature ; }, abstract = {The Dazu Rock Carvings, a UNESCO World Heritage site with over a millennium of history, are facing significant deterioration from microbial biofilms. However, the key microbial species responsible and the environmental factors driving their growth remain unclear. To address this gap, we conducted metagenomic sequencing to characterize the microbial community on the carvings, followed by correlation analyses with a variety of environmental factors in the surrounding air and within the rocks. Bacterial communities exhibited significantly higher richness and diversity than eukaryotic communities, though diversity metrics showed no significant differences between visibly colonized and uncolonized surfaces. We identified a distinctive consortium of 64 bacterial species, 35 fungal species, and 1 algal species specifically associated with visible biofilms, occurring at 9.56-fold higher relative abundance in colonized areas. These microorganisms contribute to characteristic green, brown-black, and white coloration on the carvings. Statistical analysis revealed absolute humidity and dew point temperature as key environmental factors influencing biofilm visibility, with thresholds of 21.00 g/m[3] and 23.4 °C respectively, above which biofilms became visible. This study provides precise targets for conservation efforts and establishes critical environmental parameters to guide preservation strategies for this irreplaceable cultural heritage.}, }
@article {pmid40174574, year = {2025}, author = {Zeng, S and Almeida, A and Mu, D and Wang, S}, title = {Embracing the unknown: Proteomic insights into the human microbiome.}, journal = {Cell metabolism}, volume = {37}, number = {4}, pages = {799-801}, doi = {10.1016/j.cmet.2025.02.003}, pmid = {40174574}, issn = {1932-7420}, mesh = {Humans ; *Proteomics/methods ; *Microbiota ; Animals ; *Gastrointestinal Microbiome ; Mice ; Inflammatory Bowel Diseases/microbiology/metabolism ; Metagenome ; *Proteome ; }, abstract = {Protein-level investigations into the human microbiome provide insights into active microbial functions. Recently, Valdés-Mas et al.[1] introduced a metagenome-informed metaproteomics approach to functionally explore species-level microbiome-host interactions and quantify the dietary exposome. Its potential has been implemented in mice and humans to uncover proteomic signatures of health and inflammatory bowel disease.}, }
@article {pmid40172536, year = {2025}, author = {Madison, JD and Osborne, OG and Ellison, A and Garvey Griffith, CN and Gentry, L and Gross, H and Gratwicke, B and Grayfer, L and Muletz-Wolz, CR}, title = {Probiotic colonization of Xenopus laevis skin causes short-term changes in skin microbiomes and gene expression.}, journal = {Infection and immunity}, volume = {93}, number = {5}, pages = {e0056924}, pmid = {40172536}, issn = {1098-5522}, support = {IOS-2131060//National Science Foundation/ ; IOS-2131061//National Science Foundation/ ; BB/W013517/1//UKRI | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; }, mesh = {Animals ; *Probiotics/pharmacology/administration &amp; dosage ; *Skin/microbiology/immunology ; *Xenopus laevis/microbiology/immunology/genetics ; *Microbiota/drug effects ; RNA, Ribosomal, 16S/genetics ; Batrachochytrium ; Transcriptome ; }, abstract = {Probiotic therapies have been suggested for amelioration efforts of wildlife disease such as chytridiomycosis caused by Batrachochytrium spp. in amphibians. However, there is a lack of information on how probiotic application affects resident microbial communities and immune responses. To better understand these interactions, we hypothesized that probiotic application would alter microbial community composition and host immune expression in Xenopus laevis. Accordingly, we applied three amphibian-derived and anti-Batrachochytrium bacteria strains (two Pseudomonas spp. and one Stenotrophomonas sp.) to X. laevis in monoculture and also as a cocktail. We quantified microbial community structure using 16S rRNA gene sequencing. We also quantified genes involved in X. laevis immune responses using quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) and skin transcriptomics over 1 and 3-week periods. All probiotic treatments successfully colonized X. laevis skin for 3 weeks, but with differential amplicon sequence variant (ASV) sequence counts over time. Bacterial community and immune gene effects were most pronounced at week 1 post-probiotic exposure and decreased thereafter. All probiotic treatments caused initial changes to bacterial community alpha and beta diversity, including reduction in diversity from pre-exposure anti-Batrachochytrium bacterial ASV relative abundance. Probiotic colonization by Pseudomonas probiotic strain RSB5.4 reduced expression of regulatory T cell marker (FOXP3, measured with RT-qPCR) and caused the greatest gene expression changes detected by transcriptomics. Single bacterial strains and mixed cultures, therefore, altered amphibian microbiome-immune interactions. This work will help to improve our understanding of the role of the microbiome-immune interface underlying both disease dynamics and emergent eco-evolutionary processes.IMPORTANCEAmphibian skin microbial communities have an important role in determining disease outcomes, in part through complex yet poorly understood interactions with host immune systems. Here we report that probiotic-induced changes to the Xenopus laevis frog skin microbial communities also result in significant alterations to these animals' immune gene expression. These findings underscore the interdependence of amphibian skin immune-microbiome interactions.}, }
@article {pmid40172215, year = {2025}, author = {Brito Rodrigues, P and de Rezende Rodovalho, V and Sencio, V and Benech, N and Creskey, M and Silva Angulo, F and Delval, L and Robil, C and Gosset, P and Machelart, A and Haas, J and Descat, A and Goosens, JF and Beury, D and Maurier, F and Hot, D and Wolowczuk, I and Sokol, H and Zhang, X and Ramirez Vinolo, MA and Trottein, F}, title = {Integrative metagenomics and metabolomics reveal age-associated gut microbiota and metabolite alterations in a hamster model of COVID-19.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2486511}, pmid = {40172215}, issn = {1949-0984}, support = {R01 DK126969/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *COVID-19/microbiology/metabolism/pathology/virology ; Metagenomics ; Disease Models, Animal ; Metabolomics ; *Aging/metabolism ; SARS-CoV-2 ; Cricetinae ; Male ; Dysbiosis/microbiology ; Age Factors ; Metabolome ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Mesocricetus ; Lung/pathology ; }, abstract = {Aging is a key contributor of morbidity and mortality during acute viral pneumonia. The potential role of age-associated dysbiosis on disease outcomes is still elusive. In the current study, we used high-resolution shotgun metagenomics and targeted metabolomics to characterize SARS-CoV-2-associated changes in the gut microbiota from young (2-month-old) and aged (22-month-old) hamsters, a valuable model of COVID-19. We show that age-related dysfunctions in the gut microbiota are linked to disease severity and long-term sequelae in older hamsters. Our data also reveal age-specific changes in the composition and metabolic activity of the gut microbiota during both the acute phase (day 7 post-infection, D7) and the recovery phase (D22) of infection. Aged hamsters exhibited the most notable shifts in gut microbiota composition and plasma metabolic profiles. Through an integrative analysis of metagenomics, metabolomics, and clinical data, we identified significant associations between bacterial taxa, metabolites and disease markers in the aged group. On D7 (high viral load and lung epithelial damage) and D22 (body weight loss and fibrosis), numerous amino acids, amino acid-related molecules, and indole derivatives were found to correlate with disease markers. In particular, a persistent decrease in phenylalanine, tryptophan, glutamic acid, and indoleacetic acid in aged animals positively correlated with poor recovery of body weight and/or lung fibrosis by D22. In younger hamsters, several bacterial taxa (Eubacterium, Oscillospiraceae, Lawsonibacter) and plasma metabolites (carnosine and cis-aconitic acid) were associated with mild disease outcomes. These findings support the need for age-specific microbiome-targeting strategies to more effectively manage acute viral pneumonia and long-term disease outcomes.}, }
@article {pmid40171165, year = {2025}, author = {Shi, H and Li, J}, title = {MAGs-based genomic comparison of gut significantly enriched microbes in obese individuals pre- and post-bariatric surgery across diverse locations.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1485048}, pmid = {40171165}, issn = {2235-2988}, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; *Obesity/microbiology/surgery ; *Bariatric Surgery ; Metagenomics/methods ; *Metagenome ; *Bacteria/genetics/classification ; Female ; Male ; Computational Biology ; Genomics ; Adult ; Middle Aged ; }, abstract = {INTRODUCTION: Obesity, a pressing global health issue, is intricately associated with distinct gut microbiota profiles. Bariatric surgeries, such as Laparoscopic Sleeve Gastrectomy (LSG), Sleeve Gastrectomy (SG), and Roux-en-Y Gastric Bypass (RYGB), induce substantial weight loss and reshape gut microbiota composition and functionality, yet their comparative impacts remain underexplored.<br><br>METHODS: This study integrated four published metagenomic datasets, encompassing 500 samples, and employed a unified bioinformatics workflow for analysis. We assessed gut microbiota &#x3b1;-diversity, identified species biomarkers using three differential analysis approaches, and constructed high-quality Metagenome-Assembled Genomes (MAGs). Comparative genomic, functional profiling&#xa0;and KEGG pathway analyses were performed, alongside estimation of microbial growth rates via Peak-to-Trough Ratios (PTRs).<br><br>RESULTS: RYGB exhibited the most pronounced enhancement of gut microbiota &#x3b1;-diversity compared to LSG and SG. Cross-cohort analysis identified 39 species biomarkers: 27 enriched in the non-obesity group (NonOB_Enrich) and 12 in the obesity group (OB_Enrich). Among the MAGs, 177 were NonOB_Enrich and 14 were OB_Enrich. NonOB_Enrich MAGs displayed enriched carbohydrate degradation profiles (e.g., GH105, GH2, GH23, GH43, and GT0 families) and higher gene diversity in fatty acid biosynthesis and secondary metabolite pathways, alongside significant enrichment in amino acid metabolism (KEGG analysis). Post-surgery, Akkermansia muciniphila and Bacteroides uniformis showed elevated growth rates based on PTRs.<br><br>DISCUSSION: These findings underscore RYGB's superior impact on gut microbiota diversity and highlight distinct microbial functional adaptations linked to weight loss, offering insights for targeted therapeutic strategies.}, }
@article {pmid40170844, year = {2025}, author = {Zhou, Y and Han, W and Feng, Y and Wang, Y and Liu, X and Sun, T and Xu, J}, title = {Revealing gut microbiota biomarkers associated with melanoma immunotherapy response and key bacteria-fungi interaction relationships: evidence from metagenomics, machine learning, and SHAP methodology.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1539653}, pmid = {40170844}, issn = {1664-3224}, mesh = {Humans ; *Gastrointestinal Microbiome/immunology ; *Metagenomics/methods ; *Melanoma/therapy/immunology/microbiology ; *Machine Learning ; *Immunotherapy/methods ; Female ; Male ; *Bacteria/genetics ; *Fungi/genetics ; Middle Aged ; Feces/microbiology ; Biomarkers ; *Skin Neoplasms/therapy/microbiology/immunology ; Aged ; Treatment Outcome ; }, abstract = {INTRODUCTION: The gut microbiota is associated with the response to immunotherapy in cutaneous melanoma (CM). However, gut fungal biomarkers and bacterial-fungal interactions have yet to be determined.<br><br>METHODS: Metagenomic sequencing data of stool samples collected before immunotherapy from three independent groups of European ancestry CM patients were collected. After characterizing the relative abundances of bacteria and fungi, Linear Discriminant Analysis Effect Size (LEfSe) analysis, Random Forest (RF) model construction, and SHapley Additive exPlanations (SHAP) methodology were applied to identify biomarkers and key bacterial-fungal interactions associated with immunotherapy responders in CM.<br><br>RESULTS: Diversity analysis revealed significant differences in the bacterial and fungal composition between CM immunotherapy responders and non-responders. LEfSe analysis identified 45 bacterial and 4 fungal taxa as potential biomarkers. After constructing the RF model, the AUC of models built using bacterial and fungal data separately were 0.64 and 0.65, respectively. However, when bacterial and fungal data were combined, the AUC of the merged model increased to 0.71. In the merged model, the following taxa were identified as important biomarkers: Romboutsia, Endomicrobium, Aggregatilinea, Candidatus Moduliflexus, Colwellia, Akkermansia, Mucispirillum, and Rutstroemia, which were associated with responders, whereas Zancudomyces was associated with non-responders. Moreover, the positive correlation interaction between Akkermansia and Rutstroemia is considered a key bacterial-fungal interaction associated with CM immunotherapy response.<br><br>CONCLUSION: Our results provide valuable insights for the enrichment of responders to immunotherapy in CM patients. Moreover, this study highlights the critical role of bacterial-fungal interactions in CM immunotherapy.}, }
@article {pmid40170118, year = {2025}, author = {Li, J and Sun, W and Cao, Y and Wu, J and Duan, L and Zhang, M and Luo, X and Deng, Q and Peng, Z and Mou, X and Li, W and Wang, P}, title = {Increased temperature enhances microbial-mediated lignin decomposition in river sediment.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {89}, pmid = {40170118}, issn = {2049-2618}, support = {32200090//National Natural Science Foundation of China/ ; 91951205//National Natural Science Foundation of China/ ; 2023A1515012270//Guangdong Basic and Applied Basic Research Foundation, China/ ; }, mesh = {*Lignin/metabolism ; *Geologic Sediments/microbiology/chemistry ; *Rivers/microbiology/chemistry ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Carbon Dioxide/metabolism ; Temperature ; Microbiota ; Carbon Isotopes ; Metagenomics ; Benzaldehydes/metabolism ; Carbon Cycle ; }, abstract = {BACKGROUND: Lignin, as the most abundant recalcitrant organic carbon in terrestrial ecosystems, plays a crucial role in the Earth's carbon cycle. After lignin entering aquatic environments, portion of it tends to accumulate in sediments, forming a stable carbon relatively reservoir. However, the increasing temperature caused by human activities may impact microbial-mediated lignin decomposition, thereby affecting sedimentary carbon reservoirs. Therefore, revealing how temperature affects microbial-mediated lignin decomposition in river sediment, a topic that remains elusive, is essential for comprehending the feedbacks between river carbon reservoirs and climate. To address this, we conducted stable isotope probing of river surface sediment using [13]C-lignin and [13]C-vanillin, and utilized a series of techniques, including CO2 production analysis, 16S rRNA gene amplicon sequencing, metagenomics, and metatranscriptomics, to identify the lignin-decomposing microbes and the effects of temperature on microbial-mediated lignin decomposition.<br><br>RESULTS: We found that elevated temperatures not only increased the total sediment respiration (total CO2) and the CO2 emissions from lignin/vanillin decomposition, but also enhanced priming effects. The [13]C-labled taxa, including Burkholderiales, Sphingomonadales, and Pseudomonadales, were identified as the main potential lignin/vanillin decomposers, and their abundances and activity significantly increased as temperature increased. Furthermore, we observed that increasing temperature significantly increased the activity of lignin decomposing pathways, including &#x3b2;-aryl ether fragments and 4,5-PDOG pathway. Additionally, as temperature increases, the transcriptional abundances of other carbon cycling related genes, such as pulA (starch decomposition) and xyla (hemicellulose decomposition), also exhibited increasing trends. Overall, our study elucidated the potential lignin-decomposing microbes and pathways in river sediment and their responses to temperature increasing.<br><br>CONCLUSIONS: Our study demonstrated that the temperature increasing can increase the rate of lignin/vanillin decomposition via affecting the activity of lignin-decomposing microbes. This finding indicates that the ongoing intensification of global warming may enhance the decomposition of recalcitrant organic carbon in river sediment, thereby impacting global carbon cycling. Video Abstract.}, }
@article {pmid40169660, year = {2025}, author = {Legrand, TPRA and Alexandre, PA and Wilson, A and Farr, RJ and Reverter, A and Denman, SE}, title = {Genome-centric metagenomics reveals uncharacterised microbiomes in Angus cattle.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {547}, pmid = {40169660}, issn = {2052-4463}, mesh = {Animals ; *Cattle/microbiology ; Feces/microbiology ; *Metagenome ; Metagenomics ; *Microbiota ; }, abstract = {Understanding the intricate nexus between cattle health and microbiome dynamics holds profound implications for enhancing animal productivity and welfare. However, our understanding of the role of these microbial communities is limited in beef cattle, especially in understudied body sites such as the oral and nasal microbiome. Here, using a genome-centric metagenomics approach, we recovered substantial metagenome-assembled genomes (MAGs) from the faecal, oral and nasal microbiome of Australian Angus cattle from different herds and life stages. The MAGs recovered from faecal samples were dominated by Bacillota and Bacteroidota, while the MAGs from saliva and nasal mucus samples were mainly associated with Pseudomonadota, Actinomycetota and Bacteroidota. Functional annotation of the MAGs revealed enriched pathways involved in the production of some amino acids, nucleic acids and short chain fatty acids (SCFA). The metabolic capacities of the MAGs were correlated with their taxonomy, notably at the phylum level. Overall, this study provides a comprehensive catalogue of MAGs to further our understanding of their role in the health and fitness of beef cattle.}, }
@article {pmid40169555, year = {2025}, author = {Li, H and Liu, P and Sun, T and Li, Y and Wu, J and Huang, Y and Yang, J and Yuan, M and Zhang, J and Yang, J and Wong, ML and Licinio, J and Zheng, P}, title = {Dynamic alterations of depressive-like behaviors, gut microbiome, and fecal metabolome in social defeat stress mice.}, journal = {Translational psychiatry}, volume = {15}, number = {1}, pages = {115}, pmid = {40169555}, issn = {2158-3188}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Feces/chemistry/microbiology ; Mice ; *Metabolome ; *Stress, Psychological/metabolism/microbiology ; Male ; *Social Defeat ; *Depressive Disorder, Major/metabolism/microbiology ; *Behavior, Animal/physiology ; Disease Models, Animal ; Humans ; *Depression/metabolism/microbiology ; Anhedonia/physiology ; Female ; Mice, Inbred C57BL ; }, abstract = {Gut microbiome is implicated in the onset and progression of major depressive disorder (MDD), but the dynamic alterations of depressive symptoms, gut microbiome, and fecal metabolome across different stages of stress exposure remain unclear. Here, we modified the chronic social defeat stress (CSDS) model to evaluate mice subjected to social defeat stress for 1, 4, 7, and 10 days. Behavioral tests, 16S rRNA, metagenomics, and fecal metabolomics were conducted to investigate the impact of stress exposure on behaviors, gut microbiota and fecal metabolites. We observed that depressive-like behaviors, such as anhedonia and social avoidance, worsened significantly as stress exposure increased. The microbial composition, function, and fecal metabolites exhibited distinct separations across the different social defeat stress groups. Mediation analysis identified key bacteria, such as Lachnospiraceae_UCG-001 and Bacteroidetes, and fecal metabolites like valeric acid and N-acetylaspartate. In our clinical depression cohort, we confirmed that fecal valeric acid levels, were significantly lower in depressive-like mice and MDD patients, correlating closely with stress exposure and anhedonia in mice. Further analysis of serum and brain metabolites in mice revealed sustained changes of N-acetylaspartate abundance in fecal, serum, and cortical samples following increasing stress exposure. Together, this study elucidated the characteristics of depressive-like behaviors, gut microbiome, and fecal metabolome across various social defeat stress exposure, and identified key bacteria and fecal metabolites potentially involved in modulating social defeat stress response and depressive-like behaviors, providing new insights into the pathogenesis and intervention of depression.}, }
@article {pmid40169018, year = {2025}, author = {Wallace, MA and Wille, M and Geoghegan, J and Imrie, RM and Holmes, EC and Harrison, XA and Longdon, B}, title = {Making sense of the virome in light of evolution and ecology.}, journal = {Proceedings. Biological sciences}, volume = {292}, number = {2044}, pages = {20250389}, pmid = {40169018}, issn = {1471-2954}, support = {//Leverhulme Trust/ ; //National Health and Medical Research Council (NHMRC)/ ; //Royal Society/ ; /WT_/Wellcome Trust/United Kingdom ; //Webster Family Chair in Viral Pathogenesis/ ; //New Zealand Royal Society Rutherford Discovery Fellowship/ ; //Innovation and Technology Commission, Hong Kong Special Administrative Region, China/ ; }, mesh = {*Virome ; *Biological Evolution ; *Viruses/genetics ; Ecosystem ; Ecology ; }, abstract = {Understanding the patterns and drivers of viral prevalence and abundance is of key importance for understanding pathogen emergence. Over the last decade, metagenomic sequencing has exponentially expanded our knowledge of the diversity and evolution of viruses associated with all domains of life. However, as most of these 'virome' studies are primarily descriptive, our understanding of the predictors of virus prevalence, abundance and diversity, and their variation in space and time, remains limited. For example, we do not yet understand the relative importance of ecological predictors (e.g. seasonality and habitat) versus evolutionary predictors (e.g. host and virus phylogenies) in driving virus prevalence and diversity. Few studies are set up to reveal the factors that predict the virome composition of individual hosts, populations or species. In addition, most studies of virus ecology represent a snapshot of single species viromes at a single point in time and space. Fortunately, recent studies have begun to use metagenomic data to directly test hypotheses about the evolutionary and ecological factors which drive virus prevalence, sharing and diversity. By synthesizing evidence across studies, we present some over-arching ecological and evolutionary patterns in virome composition, and illustrate the need for additional work to quantify the drivers of virus prevalence and diversity.}, }
@article {pmid40168930, year = {2025}, author = {Tang, GX and Huang, YH and Feng, LW and Hu, YC and Wei, JL and Lü, H and Liu, LH and Zhao, HM and Xiang, L and Li, H and Mo, CH and Li, YW and Cai, QY}, title = {New insights into rhizosphere bacterial community shaped by lettuce genotypes for divergent degradation efficiencies of phthalates.}, journal = {Journal of hazardous materials}, volume = {492}, number = {}, pages = {138077}, doi = {10.1016/j.jhazmat.2025.138077}, pmid = {40168930}, issn = {1873-3336}, mesh = {*Rhizosphere ; *Lactuca/genetics/microbiology/metabolism ; Genotype ; *Soil Pollutants/metabolism ; *Bacteria/genetics/metabolism ; Soil Microbiology ; Biodegradation, Environmental ; RNA, Ribosomal, 16S/genetics ; Plant Roots/microbiology/metabolism ; *Diethylhexyl Phthalate/metabolism ; *Phthalic Acids/metabolism ; Microbiota ; }, abstract = {Rhizosphere dissipation of organic pollutants benefits safe utilization of the polluted agricultural soil. Nevertheless, dissipation variation of phthalates (PAEs) in rhizosphere among different vegetable genotypes and the related microbial mechanisms remain unknown. Here, twelve lettuce cultivars with different genetic relationships identified by 18S rRNA gene sequencing were cultivated in soil spiked with di-(2-ethylhexyl) phthalate (DEHP). Bacterial communities and function genes in rhizosphere of lettuce were analyzed by 16S rRNA gene and metagenomic sequencing. Results showed significant variations in DEHP concentrations of roots (2.8-15.3 mg/kg) and shoots (0.70-1.8 mg/kg) among 12 cultivars. Notably, cultivars L11 and L12 showed the lowest DEHP accumulation in roots and shoots, being lower by 82 % and 58 % than the highest accumulators (cultivars L5 and L6), respectively. This accumulation variation was closely connected with their genetic relationships and exhibited genotype-dependent trait. The significantly different bacterial community diversities and structures were recorded in rhizosphere among 12 cultivars. Especially, bacterial communities in rhizosphere of cultivars L11 and L12 (low-DEHP accumulators with high DEHP dissipation) strengthened their adaptation by enriching pollutant-resistant taxa, increasing extracellular polymeric substance contents and biofilm formation, as well as constructing complex ecological networks under DEHP pollution. Moreover, PAE-degrading bacteria and genes (e.g., hydrolase65, phtAb, and pcaI) in rhizosphere were enriched by low-DEHP accumulators, which benefited DEHP removal and subsequently safe agricultural products. This study provides new insights into microbial mechanisms on rhizosphere DEHP degradation and its correlation with accumulation variation among different crop genotypes.}, }
@article {pmid40168325, year = {2025}, author = {Yun, H and Seo, JH and Kim, YK and Yang, J}, title = {Examining the bacterial diversity including extracellular vesicles in air and soil: implications for human health.}, journal = {PloS one}, volume = {20}, number = {4}, pages = {e0320916}, pmid = {40168325}, issn = {1932-6203}, mesh = {*Soil Microbiology ; *Extracellular Vesicles/genetics ; Humans ; *Bacteria/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Biodiversity ; *Air Microbiology ; Microbiota ; Metagenomics ; Republic of Korea ; }, abstract = {As the significance of human health continues to rise, the microbiome has shifted its focus from microbial composition to the functional roles it plays. In parallel, interest in ultrafine particles associated with clinically important impact has been increasing. Bacterial extracellular vesicles (BEVs), involved in systemic microbiome activity, are nano-sized spherical vesicles (20 - 100 nm in diameter) containing DNA, RNA, proteins, and lipids. They are known to be absorbed into the body potentially through air and soil, circulate in the blood, and directly impact diseases by affecting organs. Therefore, the aim of this study is to examine the biodiversity of bacteria and BEVs and predicted functional pathways. We sampled air and soil samples in Seoul, Korea and analyzed metagenomics based on 16S rRNA sequencing. At the phylum levels, Firmicutes in BEVs from soil and air were significantly higher than in bacteria, and Acidobacteria in both bacteria and BEVs from soil were significantly higher than from air (p < 0.05). The most dominant genera were Pseudomonas in bacteria from air and soil; and Escherichia-Shigella in BEVs from air and soil. In addition, Two-component system (ko02020) and ATP-binding cassette transporters (ko02010) were dominant functional pathways in both air and soil. The most functional pathways and orthologous groups were significantly different between air and soil (p < 0.05). In conclusion, human health can be affected differently depending on type of environment. Future study is necessary to have a better understanding of human health effects from environmental microbiota.}, }
@article {pmid40167332, year = {2025}, author = {Curto, M and Veríssimo, A and Riccioni, G and Santos, CD and Ribeiro, F and Jentoft, S and Alves, MJ and Gante, HF}, title = {Improving Whole Biodiversity Monitoring and Discovery With Environmental DNA Metagenomics.}, journal = {Molecular ecology resources}, volume = {}, number = {}, pages = {e14105}, doi = {10.1111/1755-0998.14105}, pmid = {40167332}, issn = {1755-0998}, support = {CEEC/0482/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; DL 57/2016/CP1440/CP1646/CT0001//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; LA/P/0069/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; PTDC/BIA-CBI/31644/2017//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; UID/04292/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; UID/BIA/00329/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; UIDP/50027/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; LA/P/0048/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; 857251//Horizon 2020 Framework Programme/ ; STG/21/044//KU Leuven/ ; }, abstract = {Environmental DNA (eDNA) metagenomics sequences all DNA molecules present in environmental samples and has the potential of identifying virtually any organism from which they are derived. However, due to unacceptable levels of false positives and negatives, this approach is underexplored as a tool for biodiversity monitoring across the tree of life, particularly for non-microscopic eukaryotes. We present SeqIDist, a framework that combines multilocus BLAST matches against several reference databases followed by an analysis of sequence identity distribution patterns to disentangle false positives while revealing new biodiversity and increasing the accuracy of metagenomic approaches. We tested SeqIDist on an eDNA metagenomic dataset from a riverine site and compared the results to those obtained with an eDNA metabarcoding approach for benchmarking purposes. We start by characterising the biological community (~2000 taxa) across the tree of life at low taxonomic levels and show that eDNA metagenomics has a higher sensitivity than eDNA metabarcoding in discovering new diversity. We show that limited representation of whole genome sequences in reference databases can lead to false positives. For non-microscopic eukaryotes, eDNA metagenomic data often consist of a few sparse, anonymous sequences scattered across the genome, making metagenome assembly methods unfeasible. Finally, we infer eDNA source and residency time using read length distributions as a measure of decay status. The higher accuracy of SeqIDist opens the discussion of the potential of eDNA metagenomics for archived samples and its implementation in long-term biodiversity monitoring at a planetary scale.}, }
@article {pmid40165946, year = {2025}, author = {Guo, Z and Wang, X and Li, Y and Zhang, Y and Guo, P and Zhang, J and Zhang, Z and Ma, X}, title = {Evaluation of the therapeutic effect of pomegranate peel ginger ultrafine powder on chronic enteritis in mice by regulating intestinal microbiota.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1563225}, pmid = {40165946}, issn = {1664-3224}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Zingiber officinale/chemistry ; Male ; *Enteritis/drug therapy/microbiology/metabolism/pathology ; Powders ; *Pomegranate/chemistry ; Disease Models, Animal ; Female ; Chronic Disease ; *Plant Extracts/pharmacology ; Cytokines/blood ; }, abstract = {To explore the efficacy and mechanism of Pomegranate peel Ginger ultrafine powder (PG) in treating chronic enteritis in mice. Sixty SPF-grade mice were randomly divided into a blank group, a model group, loperamide hydrochloride group (5 mg/kg), a high-dose PG group (100 mg/kg), a medium-dose group (50 mg/kg), and a low-dose group (25 mg/kg), with 10 mice in each group and an equal number of males and females. A chronic enteritis mouse model was established using a multifactorial method of low temperature + ice water + castor oil. The blank group was given an equal amount of physiological saline intragastrically, while the other groups were intervened with corresponding drugs for 7 consecutive days. After 7 days, samples were collected, and Enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of interleuckin 1β (IL-1β), IL-6, and Tumor necrosis factorα(TNF-α) in mouse serum. HE staining was used to examine the pathological changes in the small intestine. oxidative reagent kits were used to detect the content of total superoxide dismutase(T-SOD) and Malondialdehyde (MDA) in the small intestine. Western blot was used to detect the expression of Aquaporin 8(AQP8) proteins in the small intestine. Real time quantitative reverse transcription polymerase chain reaction (RT-qPCR) was used to detect the expression of AQP3, AQP4, AQP8, and Sodium/hydrogen exchanger 8 (NHE8) genes in the small intestine. metagenomics was used to detect the gut microbiota in mouse feces. Compared with the model group, all doses of PG groups reduced the levels of IL-1β, IL-6, and TNF-α in mouse serum (P<0.05), improved pathological changes in the small intestine, increased the content of T-SOD in the small intestine tissue, reduced the content of MDA, increased the expression of AQP4 and AQP8 mRNA, and decreased the expression of AQP3 and NHE8 mRNA (P<0.05), increased the expression of AQP8 protein. PG could improve the pathological changes of chronic enteritis in mice, enhance antioxidant capacity, and alleviate diarrhea caused by chronic enteritis by downregulating the expression of intestinal epithelial transport proteins and acute-phase proteins, and altering gut microbiota.}, }
@article {pmid40165255, year = {2025}, author = {Xie, B and Dong, C and Zhao, X and Qu, L and Lv, Y and Liu, H and Xu, J and Yu, Z and Shen, H and Shang, Y and Zhao, X and Zhang, J}, title = {Structural and functional alteration of the gut microbiomes in ICU staff: a cross-sectional analysis.}, journal = {Critical care (London, England)}, volume = {29}, number = {1}, pages = {141}, pmid = {40165255}, issn = {1466-609X}, support = {82402568//National Natural Science Foundation of China/ ; 82472223//National Natural Science Foundation of China/ ; }, mesh = {Humans ; Cross-Sectional Studies ; *Gastrointestinal Microbiome/physiology ; Intensive Care Units/organization &amp; administration/statistics &amp; numerical data ; Male ; Female ; Prospective Studies ; Middle Aged ; Adult ; Feces/microbiology ; RNA, Ribosomal, 16S/analysis ; Cohort Studies ; }, abstract = {BACKGROUND: 16S rRNA sequencing has revealed structural alterations in the gut microbiomes of medical workers, particularly those working in intensive care unit (ICU). This study aims to further compare the taxonomic and functional characteristics of gut microbiomes between ICU staff and non-medical individuals using metagenomic sequencing.<br><br>METHODS: A prospective cross-sectional cohort study was conducted, fecal samples from 39 individuals in each group-ICU staff and non-medical subjects were analyzed using metagenomic sequencing. PERMANOVA (using the adonis function) was employed to analyze the genus-level profiles and assess the impact of individual parameters on the gut microbiome. Multiple databases were utilized to annotate and compare the functional differences in gut microbiomes between the two groups.<br><br>RESULTS: We observed that ICU staff exhibited a significant decrease in gut microbiome diversity, characterized by a marked decline in Actinobacteria and a substantial increase in Bacteroides and Bacteroidaceae. CAZy annotation revealed a notable increase in carbohydrate-active enzymes within the ICU staff cohort. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis further indicated an elevated risk of endocrine and metabolic disorders, along with enhanced glycan biosynthesis and metabolism. Additionally, KEGG pathway enrichment analysis highlighted significant enrichment in cancer-related pathways. Analysis using the Virulence Factor Database (VFDB) showed a higher abundance of virulence factors associated with immune modulation, invasion, and antimicrobial activity/competitive advantage among ICU staff. Notably, no discernible difference in the presence of antibiotic resistance genes within the gut microbiomes was observed between the two groups. Importantly, all aforementioned differences demonstrated clear gender disparities.<br><br>CONCLUSIONS: Our findings indicated that ICU staff exhibited a reduction in gut microbiome diversity which was associated with an increase in virulence factors and carbohydrate-active enzymes, as well as with a heightened susceptibility to endocrine and metabolic diseases and cancers.}, }
@article {pmid40164980, year = {2025}, author = {Otani, S and Louise Jespersen, M and Brinch, C and Duus Møller, F and Pilgaard, B and Egholm Bruun Jensen, E and Leekitcharoenphon, P and Aaby Svendsen, C and Aarestrup, AH and Sonda, T and Sylvina, TJ and Leach, J and Piel, A and Stewart, F and Sapountzis, P and Kazyoba, PE and Kumburu, H and Aarestrup, FM}, title = {Genomic and functional co-diversification imprint African Hominidae microbiomes to signal dietary and lifestyle adaptations.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2484385}, pmid = {40164980}, issn = {1949-0984}, mesh = {Animals ; *Hominidae/microbiology/physiology ; *Diet ; *Bacteria/genetics/classification/isolation &amp; purification ; Humans ; Life Style ; *Gastrointestinal Microbiome/genetics ; Pan troglodytes/microbiology ; Adaptation, Physiological ; Africa ; Phylogeny ; Metagenome ; }, abstract = {In the diverse landscape of African hominids, the obligate relationship between the host and its microbiome narrates signals of adaptation and co-evolution. Sequencing 546 African hominid metagenomes, including those from indigenous Hadza and wild chimpanzees, identified similar bacterial richness and diversity surpassing those of westernized populations. While hominids share core bacterial communities, they also harbor distinct, population-specific bacterial taxa tailored to specific diets, ecology and lifestyles, differentiating non-indigenous and indigenous humans and chimpanzees. Even amongst shared bacterial communities, several core bacteria have co-diversified to fulfil unique dietary degradation functions within their host populations. These co-evolutionary trends extend to non-bacterial elements, such as mitochondrial DNA, antimicrobial resistance, and parasites. Our findings indicate that microbiome-host co-adaptations have led to both taxonomic and within taxa functional displacements to meet host physiological demands. The microbiome, in turn, transcends its taxonomic interchangeable role, reflecting the lifestyle, ecology and dietary history of its host.}, }
@article {pmid40164860, year = {2025}, author = {Adawiah, A and Meryandini, A and Ridwan, R and Fidriyanto, R and Sarwono, KA and Wiryawan, KG}, title = {The rumen microbiome and metabolome profile of Ongole crossbreed cattle fed probiotics and protected amino acids.}, journal = {Tropical animal health and production}, volume = {57}, number = {3}, pages = {148}, pmid = {40164860}, issn = {1573-7438}, mesh = {Animals ; *Probiotics/administration &amp; dosage ; Cattle/microbiology/metabolism ; *Rumen/microbiology/metabolism ; *Amino Acids/administration &amp; dosage/metabolism ; *Metabolome/drug effects ; *Gastrointestinal Microbiome/drug effects ; Diet/veterinary ; Animal Feed/analysis ; Male ; Cross-Over Studies ; Bacteria/classification/isolation &amp; purification ; Animal Nutritional Physiological Phenomena ; }, abstract = {This study aimed to investigate the microbial population dynamics and metabolite profiles of Ongole crossbreed cattle (OCC) fed a combination of feed additives using metagenomic and metabolomic analyses. A crossover design was employed, involving four 3-year-old fistulated OCC bulls, each receiving four distinct dietary treatments per experimental period, followed by a washout phase with a basal diet. The treatments consisted of a basal diet (G1) as control, and the addition of feed additives as follows: G2: probiotics (Lactiplantibacillus plantarum); G3: premix; G4: G2 + G3 + amino acids lysine and methionine; and G5: G2 + G3 + amino acids protected with tannin. Rumen fluid was collected for the analysis of microbiome dynamics and metabolite profiles. The bacterial communities in diets G1, G2, G3, and G5 exhibited similar compositions, dominated by Bacteroidota, particularly the genus Prevotella. The G5 diet successfully suppressed the population of archaea, notably Methanosarcinales and Methanobacteriales, which are associated with methane production. A total of 28 significant metabolites (VIP > 1) was identified in rumen fluid, including lipid prenols, phenolic compounds, indoles and derivatives, saturated and unsaturated hydrocarbons, fatty acyls, benzene derivatives, and organooxygen compounds. The volatile compounds profile of rumen fluid showed a marked increase in prenol lipid compounds, especially in the G5 diet. Additionally, Methanosarcinales and Methanobacteriales were negatively correlated with prenol lipid levels. The inclusion of probiotics and protected amino acids alters the microbiome community structure and metabolites, positively affecting ruminant productivity.}, }
@article {pmid40164832, year = {2025}, author = {Litichevskiy, L and Considine, M and Gill, J and Shandar, V and Cox, TO and Descamps, HC and Wright, KM and Amses, KR and Dohnalová, L and Liou, MJ and Tetlak, M and Galindo-Fiallos, MR and Wong, AC and Lundgren, P and Kim, J and Uhr, GT and Rahman, RJ and Mason, S and Merenstein, C and Bushman, FD and Raj, A and Harding, F and Chen, Z and Prateek, GV and Mullis, M and Deighan, AG and Robinson, L and Tanes, C and Bittinger, K and Chakraborty, M and Bhatt, AS and Li, H and Barnett, I and Davenport, ER and Broman, KW and Levy, M and Cohen, RL and Botstein, D and Freund, A and Di Francesco, A and Churchill, GA and Li, M and Thaiss, CA}, title = {Gut metagenomes reveal interactions between dietary restriction, ageing and the microbiome in genetically diverse mice.}, journal = {Nature microbiology}, volume = {10}, number = {5}, pages = {1240-1257}, pmid = {40164832}, issn = {2058-5276}, mesh = {Animals ; *Aging/genetics/physiology ; *Gastrointestinal Microbiome/genetics ; Mice ; *Caloric Restriction ; *Metagenome ; Humans ; Male ; Mice, Inbred C57BL ; Female ; Longevity ; }, abstract = {The gut microbiome changes with age and has been proposed to mediate the benefit of lifespan-extending interventions such as dietary restriction. However, the causes and consequences of microbiome ageing and the potential of such interventions remain unclear. Here we analysed 2,997 metagenomes collected longitudinally from 913 deeply phenotyped, genetically diverse mice to investigate interactions between the microbiome, ageing, dietary restriction (caloric restriction and fasting), host genetics and a range of health parameters. Among the numerous age-associated microbiome changes that we find in this cohort, increased microbiome uniqueness is the most consistent parameter across a second longitudinal mouse experiment that we performed on inbred mice and a compendium of 4,101 human metagenomes. Furthermore, cohousing experiments show that age-associated microbiome changes may be caused by an accumulation of stochastic environmental exposures (neutral theory) rather than by the influence of an ageing host (selection theory). Unexpectedly, the majority of taxonomic and functional microbiome features show small but significant heritability, and the amount of variation explained by host genetics is similar to ageing and dietary restriction. We also find that more intense dietary interventions lead to larger microbiome changes and that dietary restriction does not rejuvenate the microbiome. Lastly, we find that the microbiome is associated with multiple health parameters, including body composition, immune components and frailty, but not lifespan. Overall, this study sheds light on the factors influencing microbiome ageing and aspects of host physiology modulated by the microbiome.}, }
@article {pmid40164638, year = {2025}, author = {Mills, S and Ijaz, UZ and Lens, PNL}, title = {Environmental instability reduces shock resistance by enriching specialist taxa with distinct two component regulatory systems.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {54}, pmid = {40164638}, issn = {2055-5008}, support = {15/RP/2763//Science Foundation Ireland (SFI)/ ; 16/RI/3401//Science Foundation Ireland (SFI)/ ; EP/P029329/1//RCUK | Engineering and Physical Sciences Research Council (EPSRC)/ ; EP/V030515/1//RCUK | Engineering and Physical Sciences Research Council (EPSRC)/ ; }, mesh = {RNA, Ribosomal, 16S/genetics ; *Bioreactors/microbiology ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics/methods ; *Microbiota ; *Microbial Consortia ; Metagenome ; High-Throughput Nucleotide Sequencing ; Methane/metabolism ; }, abstract = {Different microbial communities are impacted disproportionately by environmental disturbances. The degree to which a community can remain unchanged under a disturbance is referred to as resistance[1]. However, the contributing ecological factors, which infer a community's resistance are unknown. In this study, the impact of historical environmental stability on ecological phenomena and microbial community resistance to shocks was investigated. Three separate methanogenic bioreactor consortia, which were subjected to varying degrees of historical environmental stability, and displayed different levels of resistance to an organic loading rate (OLR) shock were sampled. Their community composition was assessed using high throughput sequencing of 16S rRNA genes and assembly based metagenomics. The effect environmental instability on ecological phenomena such as microbial community assembly, microbial niche breadth and the rare biosphere were assessed in the context of each reactor's demonstrated resistance to an OLR shock. Additionally, metagenome assembled genomes were analysed for functional effects of prolonged stability/instability. The system which was subjected to more environmental instability experienced more temporal variation in community beta diversity and a proliferation of specialists, with more abundant two component regulatory systems. This community was more susceptible to deterministic community assembly and demonstrated a lower degree of resistance, indicating that microbial communities experiencing longer term environmental instability (e.g. variations in pH or temperature) are less able to resist a large disturbance.}, }
@article {pmid40158829, year = {2025}, author = {Liu, Y and Zhang, Q and Lu, L and Qian, Y and Wu, Y and Hu, D and Xu, Y and Xu, H and Ji, G}, title = {Huang-qin decoction alleviates deoxycholic acid-induced colorectal cancer in mice by regulating gut microbiota.}, journal = {Journal of ethnopharmacology}, volume = {346}, number = {}, pages = {119715}, doi = {10.1016/j.jep.2025.119715}, pmid = {40158829}, issn = {1872-7573}, mesh = {Animals ; *Drugs, Chinese Herbal/pharmacology/therapeutic use ; *Gastrointestinal Microbiome/drug effects ; *Colorectal Neoplasms/chemically induced/drug therapy/microbiology/pathology ; Mice ; Deoxycholic Acid/toxicity ; Male ; Mice, Inbred C57BL ; Protein Interaction Maps/drug effects ; Network Pharmacology ; Apoptosis/drug effects ; Astragalus propinquus ; }, abstract = {Huangqin Decoction (HQD), a traditional Chinese medicine (TCM) formula documented in Shang Han Lun, has demonstrated safety and efficacy in the treatment of ulcerative colitis (UC). Recent studies also suggest that HQD exerts therapeutic effects on colorectal cancer (CRC). However, the underlying mechanisms remain unclear.<br><br>AIMS OF THE STUDY: This study aimed to investigate the therapeutic effects of HQD on CRC and explore its potential mechanisms of action.<br><br>METHODS: The active ingredients and potential targets of HQD were identified through network pharmacology-based analyses. The CRC-related targets were compared with those of HQD. Shared targets were subjected to Gene Ontology (GO) functional enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses, and a protein-protein interaction (PPI) network was constructed. Additionally, APC[min/+] mice were treated with 0.2&#xa0;% deoxycholic acid (DCA) and gavaged with low or high doses of HQD. Tumor morphology was assessed using hematoxylin and eosin (HE) staining. Immunohistochemical staining was performed to evaluate the expression of Ki-67, Caspase-3, and MUC2 in the intestine. Periodic acid-Schiff (PAS) and PAS-alcian blue (PAS-AB) staining were utilized to detect mucin distribution and the number of goblet cells in the intestines of the mice. The mRNA expression levels of interleukin 6 (IL-6), mitogen-activated protein kinase 8 (MAPK8), vascular endothelial growth factor A (VEGFA), epidermal growth factor receptor (EGFR), albumin (ALB), and Caspase 3 (CASP3) were quantified using quantitative reverse-transcription PCR (qRT-PCR). Immunofluorescence was employed to assess the degree of apoptosis. Additionally, 16S ribosomal RNA gene sequencing, sequence curation and annotation, and metagenomic sequencing were performed to analyze changes in the composition of the mouse intestinal microbiota and related functions and signaling pathways.<br><br>RESULTS: The active ingredients of HQD were identified. GO and KEGG pathway enrichment analyses indicated that the shared targets were primarily involved in tumor suppression. HQD effectively treated DCA-induced CRC in mice. Furthermore, positive PAS and PAS-AB staining was significantly increased in the intestines of mice treated with HQD. HQD enhanced the abundance of Lachnospiraceae, Firmicutes, Fusobacteria, and Clostridium, while reducing the abundance of Eggerthellales. Additionally, HQD modulated secondary bile acid metabolism, carbohydrate synthesis, and other energy metabolism pathways, which may underlie its therapeutic effects.<br><br>CONCLUSION: HQD effectively treated CRC in mice, and its mechanisms of action may be related to the regulation of the gut microbiota.}, }
@article {pmid40158160, year = {2025}, author = {Zhu, M and Wang, Q and Yang, Y and Liu, X and Zhang, J and Li, G and Liu, W and Xiang, X and Chen, J}, title = {Multiomics approach reveals the comprehensive interactions between nutrition and children's gut microbiota, and microbial and host metabolomes.}, journal = {Nutrition journal}, volume = {24}, number = {1}, pages = {50}, pmid = {40158160}, issn = {1475-2891}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Child, Preschool ; Male ; Child ; Female ; Cross-Sectional Studies ; *Metabolome/physiology ; *Diet ; China ; Feces/microbiology ; *Metabolomics/methods ; *Nutritional Status ; Metagenomics ; Multiomics ; }, abstract = {The gut microbiome can modulate nutrient metabolism to produce many metabolites interacting with the host. However, the intricate interactions among dietary intake, the gut microbiome and metabolites, and host metabolites need to be further explored although some studies have been devoted to it. Here, in a cross-sectional studies, 88 children aged 2-12 years were enrolled from northwestern China. The dietary intake data were collected via a designed food frequency questionnaire to calculate plant-based diet indices (PDIs). Stool and plasma samples were collected for metagenomic and broad-targeted metabolomic analysis. Spearman's rank correlation was used to describe the associations between nutrients/PDIs and the gut microbiota and metabolites. PDI was significantly positively associated with Bilophila wadsworthia, Bacteroides thetaiotaomicron, and Alistipes indistinctus, etc., but was obviously negatively correlated with Roseburia intestinalis, Faecalibacterium prausnitzii, etc. However, these species showed no significant associations with either healthy PDI (hPDI) or unhealthy PDI (uPDI). Interestingly, hPDI was significantly positively related to species, including Ruminococcus bicirculans, and was significantly negatively associated with uPDI, and vice versa. The above correlation trends were also observed between PDIs and predicted gut microbial functional pathways, microbial metabolites and the host metabolome. Notably, the significantly related pathways were focused mainly on substances and energy metabolism. PDI was significantly positively associated with the fecal contents of P-aminobenzoate, chenodeoxycholic acid, 4,6-dihydroxyquinoline, quinoline-4,8-diol, etc., but was significantly negatively associated with those of TMAO, FFA, creatine phosphate, etc. In plasma, PDI was significantly positively associated with sarcosine, ornithine, L-histidine, etc., but was distinctly negatively correlated with FFAs, carnitine C2:0, etc. Strikingly, the healthy plant-based diet index (hPDI) is correlated with increased levels of metabolites related to tryptophan metabolism, whereas the unhealthy PDI (uPDI) is linked to increased levels of metabolites associated with tyrosine and sphingolipid metabolism, which are pathways commonly associated with Western diets. Our studies provide reliable data support and a comprehensive understanding of the effects of dietary intake on the gut microbiome and microbial and host metabolites and lay a foundation for further studies of the diet-gut microbiota-microbial metabolites and host metabolism.}, }
@article {pmid40158141, year = {2025}, author = {Jiang, Y and Aton, M and Zhu, Q and Lu, YY}, title = {Modeling microbiome-trait associations with taxonomy-adaptive neural networks.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {87}, pmid = {40158141}, issn = {2049-2618}, support = {RGPIN-03270-2023//Canadian NSERC Discovery Grant/ ; }, mesh = {Humans ; *Neural Networks, Computer ; *Microbiota ; Metagenomics/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; Computer Simulation ; }, abstract = {The human microbiome, a complex ecosystem of microorganisms inhabiting the body, plays a critical role in human health. Investigating its association with host traits is essential for understanding its impact on various diseases. Although shotgun metagenomic sequencing technologies have produced vast amounts of microbiome data, analyzing such data is highly challenging due to its sparsity, noisiness, and high feature dimensionality. Here, we develop MIOSTONE, an accurate and interpretable neural network model for microbiome-disease association that simulates a real taxonomy by encoding the relationships among microbial features. The taxonomy-encoding architecture provides a natural bridge from variations in microbial taxa abundance to variations in traits, encompassing increasingly coarse scales from species to domains. MIOSTONE has the ability to determine whether taxa within the corresponding taxonomic group provide a better explanation in a data-driven manner. MIOSTONE serves as an effective predictive model, as it not only accurately predicts microbiome-trait associations across extensive simulated and real datasets but also offers interpretability for scientific discovery. Both attributes are crucial for facilitating in silico investigations into the biological mechanisms underlying such associations among microbial taxa. Video Abstract.}, }
@article {pmid40157594, year = {2025}, author = {Wang, C and Fan, S and Li, M and Ye, Y and Li, Z and Long, W and Li, Y and Huang, Z and Jiang, Q and Yang, W and Yang, R and Tang, D}, title = {A 7-year feed study on the long-term effects of genetically modified maize containing cry1Ab/cry2Aj and EPSPS genes on gut microbiota and metabolite profiles across two generations of cynomolgus macaques.}, journal = {Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association}, volume = {200}, number = {}, pages = {115419}, doi = {10.1016/j.fct.2025.115419}, pmid = {40157594}, issn = {1873-6351}, mesh = {Animals ; *Zea mays/genetics/metabolism ; *Plants, Genetically Modified/genetics/metabolism ; *Gastrointestinal Microbiome/drug effects ; Macaca fascicularis ; *Endotoxins/genetics/metabolism ; *Hemolysin Proteins/genetics/metabolism ; Bacillus thuringiensis Toxins ; *Animal Feed/analysis ; Male ; *Bacterial Proteins/genetics/metabolism ; Female ; }, abstract = {The health implications of genetically modified (GM) crops remain controversial relative to their non-GM counterparts, particularly regarding long-term dietary exposure. Although the gut microbiome is a key health indicator, studies investigating the impact of GM crop consumption on intestinal microbiota remain limited. This study presents a comprehensive 7-year evaluation of GM maize expressing cry1Ab/cry2Aj and G10evo-EPSPS proteins through metagenomic and metabolomic analyses. We assessed the effects of GM maize consumption on gut microbiota diversity and metabolite profiles in cynomolgus macaques (Macaca fascicularis) compared with non-GM maize. Three diet regimens were implemented: a conventional compound feed (CK group), diet formulation containing 70 % non-GM maize (Corn group), and diet formulation containing 70 % GM maize (Tg group). The results demonstrated that feeding GM maize to the first (F0) and second (F1) generations of monkeys did not substantially affect the composition, community structure, or function of the intestinal microbiome, as indicated by species composition and diversity analyses. Minor differences in intestinal metabolites were observed but were not directly linked to transgenic maize consumption. Collectively, long-term intake of maize with cry1Ab/cry2Aj and g10evo-epsps genes had no adverse effects on macaques or their offspring.}, }
@article {pmid40157532, year = {2025}, author = {Pienaar, RD and Herrero, S and Cerqueira de Araujo, A and Krupa, F and Abd-Alla, AMM and Herniou, EA}, title = {High-throughput screening reveals high diversity and widespread distribution of viruses in black soldier flies (Hermetia illucens).}, journal = {Journal of invertebrate pathology}, volume = {211}, number = {}, pages = {108322}, doi = {10.1016/j.jip.2025.108322}, pmid = {40157532}, issn = {1096-0805}, mesh = {Animals ; *Diptera/virology ; *Insect Viruses/genetics/isolation &amp; purification/classification ; High-Throughput Nucleotide Sequencing ; High-Throughput Screening Assays ; *Virome ; }, abstract = {Virus discovery in mass-reared insects is a growing topic of interest due to outbreak risks and for insect welfare concerns. In the case of black soldier flies (Hermetia illucens, BSF), pioneering bioinformatic studies have uncovered exogenous viruses from the orders Ghabrivirales and Bunyavirales, as well as endogenous viral elements from five virus families. This prompted further virome investigation of BSF metagenomes and metatranscriptomes, including from BSF individuals displaying signs and symptoms of disease. A high-throughput pipeline allowed the simultaneous investigation of 203 next generation sequencing datasets. This revealed the presence of seven viruses belonging to the families Dicistroviridae, Iflaviridae, Rhabdoviridae, Solinviviridae, Inseviridae, Lebotiviridae, and an unclassified Bunyavirales. Here we describe five viruses, which were detected in BSF from multiple origins, outlining the diversity of naturally occurring viruses associated with BSF colonies. As this viral community may also include BSF pathogens, we developed molecular detection tools which could be used for viral surveillance, both in mass-reared and wild populations of BSF.}, }
@article {pmid40156868, year = {2025}, author = {Yang, W and Luyten, Y and Reister, E and Mangelson, H and Sisson, Z and Auch, B and Liachko, I and Roberts, RJ and Ettwiller, L}, title = {Proxi-RIMS-seq2 applied to native microbiomes uncovers hundreds of known and novel m5C methyltransferase specificities.}, journal = {Nucleic acids research}, volume = {53}, number = {6}, pages = {}, pmid = {40156868}, issn = {1362-4962}, support = {R44 AI172703/AI/NIAID NIH HHS/United States ; //Bill &amp; Melinda Gates Foundation/ ; //New England Biolabs, Inc./ ; R44AI172703/GF/NIH HHS/United States ; }, mesh = {*Methyltransferases/metabolism/genetics ; *Microbiota/genetics ; DNA Methylation ; Substrate Specificity ; High-Throughput Nucleotide Sequencing/methods ; *Bacteria/genetics/enzymology ; Bacteriophages/genetics ; }, abstract = {Methylation patterns in bacteria can be used to study restriction-modification or other defense systems with novel properties. While m4C and m6A methylation are well characterized mainly through PacBio sequencing, the landscape of m5C methylation is under-characterized. To bridge this gap, we performed RIMS-seq2 (rapid identification of methyltransferase specificity sequencing) on microbiomes composed of resolved assemblies of distinct genomes through proximity ligation. This high-throughput approach enables the identification of m5C methylated motifs and links them to cognate methyltransferases directly on native microbiomes without the need to isolate bacterial strains. Methylation patterns can also be identified on bacteriophage DNA and compared with host DNA, strengthening evidence for phage-host interactions. Applied to three different microbiomes, the method unveiled over 1900 motifs that were deposited in REBASE. The motifs include a novel eight-base recognition site (CATm5CGATG) that was experimentally validated by characterizing its cognate methyltransferase. Our findings suggest that microbiomes harbor arrays of untapped m5C methyltransferase specificities, providing insights into bacterial biology and biotechnological applications.}, }
@article {pmid40156579, year = {2025}, author = {Sanghani, A and Antaliya, K and Patel, R and Dave, S and Tipre, D}, title = {Revealing microbial functionalities and ecological roles in Rajpardi lignite mine: insights from metagenomics analysis.}, journal = {Letters in applied microbiology}, volume = {78}, number = {4}, pages = {}, doi = {10.1093/lambio/ovaf048}, pmid = {40156579}, issn = {1472-765X}, mesh = {*Metagenomics ; India ; *Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Mining ; *Soil Microbiology ; Phylogeny ; *Microbiota ; }, abstract = {The present study employs a metagenomics approach to evaluate microbial communities' ecological functions and potential within the Rajpardi lignite mine of Gujarat, India. Through whole genome shotgun sequencing on the Illumina Miseq platform, we obtained 10 071 318 sequences, which unveiled a diverse and abundant microbial community primarily composed of Proteobacteria, Acidobacteria, and Nitrospirae. Comprehensive taxonomic profiling and gene prediction was carried out using the SqueezeMeta pipline, which highlighted significant contributions to carbohydrate, amino acid, and energy metabolism. The detection of antimicrobial resistance and stress resistance genes, such as blaTEM and merA, suggests that these microbes possess the ability to adapt to harsh environmental conditions. Genome binning revealed species such as Acidiphilum sp. 20-67-58, emphasizing the nature of these communities as they adapted to an acidic environment. This finding highlights the crucial role of microbes in biogeochemical cycles, emphasizing their potential in bioremediation, pollutant degradation, and ecosystem restoration.}, }
@article {pmid40156577, year = {2025}, author = {Kop, LFM and Koch, H and Dalcin Martins, P and Suarez, C and Karačić, S and Persson, F and Wilén, BM and Hagelia, P and Jetten, MSM and Lücker, S}, title = {High diversity of nitrifying bacteria and archaea in biofilms from a subsea tunnel.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {5}, pages = {}, pmid = {40156577}, issn = {1574-6941}, support = {2022-06725//Swedish Research Council/ ; 024.002.002/NWO_/Dutch Research Council/Netherlands ; //Norwegian Public Roads Administration/ ; }, mesh = {*Biofilms/growth &amp; development ; *Nitrification ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Archaea/genetics/classification/isolation &amp; purification/metabolism ; Norway ; Phylogeny ; *Biodiversity ; Metagenomics ; Construction Materials/microbiology ; }, abstract = {Microbial biofilm formation can contribute to the accelerated deterioration of steel-reinforced concrete structures and significantly impact their service life, making it critical to understand the diversity of the biofilm community and prevailing processes in these habitats. Here, we analyzed 16S rRNA gene amplicon and metagenomics sequencing data to study the abundance and diversity of nitrifiers within biofilms on the concrete surface of the Oslofjord subsea road tunnel in Norway. We showed that the abundance of nitrifiers varied greatly in time and space, with a mean abundance of 24.7 ± 15% but a wide range between 1.2% and 61.4%. We hypothesize that niche differentiation allows the coexistence of several nitrifier groups and that their high diversity increases the resilience to fluctuating environmental conditions. Strong correlations were observed between the nitrifying families Nitrosomonadaceae and Nitrospinaceae, and the iron-oxidizing family Mariprofundaceae. Metagenome-assembled genome analyses suggested that early Mariprofundaceae colonizers may provide a protected environment for nitrifiers in exchange for nitrogen compounds and vitamin B12, but further studies are needed to elucidate the spatial organization of the biofilms and the cooperative and competitive interactions in this environment. Together, this research provides novel insights into the diverse communities of nitrifiers living within biofilms on concrete surfaces and establishes a foundation for future experimental studies of concrete biofilms.}, }
@article {pmid40154057, year = {2025}, author = {Chen, H and Zhong, S and Liu, Z and Hu, Z and Wang, C and Zhou, Y and Xu, N and Zhao, F and Li, D and Hu, Y}, title = {Microbiome-metabolomic insights into the systemic regulation in Fangxian Huangjiu fermentation.}, journal = {Food chemistry}, volume = {481}, number = {}, pages = {143980}, doi = {10.1016/j.foodchem.2025.143980}, pmid = {40154057}, issn = {1873-7072}, mesh = {Fermentation ; *Microbiota ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; Metabolomics ; }, abstract = {Metabolic forces drive microecological succession in Huangjiu fermentation. This study investigates the dynamic metabolic-microbial interplay during Fangxian Huangjiu fermentation. Temporal changes of metabolome and microbiome revealed a syntropic relationship that purified the microbial community with convergent metabolic patterns. With species turnover driving microbial community structure, early-stage microbiomes exhibited great functional diversity. Functions related to energy and molecular building blocks were enriched at the end of early stage, and contributed greatly to microbial adaptation, highlighting the importance of metabolic forces in shaping community structure. Proteobacteria were identified as key facilitators of diverse metabolic activities, and Enterobacter emerged as a fundamental microbial community particularly for materials transformation. Correlation analysis enriched amino acid metabolism pathways. Further, Pantoea ananatis and Wickerhamomyces anomalus were isolated to enhance sphingosine-1-phosphate, γ-aminobutyric acid, and creatine levels without altering physicochemical properties. The study offers insights into the regulation of Huangjiu fermentation, and suggested potential micobiome manipulation to optimize characteristics.}, }
@article {pmid40153355, year = {2025}, author = {Klištincová, N and Koreňová, J and Rešková, Z and Čaplová, Z and Burdová, A and Farkas, Z and Polovka, M and Drahovská, H and Pangallo, D and Kuchta, T}, title = {Bacterial consortia of ewes' whey in the production of bryndza cheese in Slovakia.}, journal = {Letters in applied microbiology}, volume = {78}, number = {4}, pages = {}, doi = {10.1093/lambio/ovaf047}, pmid = {40153355}, issn = {1472-765X}, support = {APVV-20-0001//Slovak Research and Development Agency/ ; }, mesh = {Animals ; Slovakia ; *Cheese/microbiology ; *Whey/microbiology ; Sheep ; RNA, Ribosomal, 16S/genetics ; Fermentation ; *Bacteria/classification/genetics/isolation &amp; purification ; *Microbial Consortia ; Female ; Food Microbiology ; DNA, Bacterial/genetics/chemistry ; Milk/microbiology ; }, abstract = {Whey from previous production is often used as a natural starter in the technology of traditional cheeses, including bryndza cheese in Slovakia. Therefore, studying its bacterial community and isolating new potential natural starters is important for improving the characteristics of the final product. Composition of bacterial consortia of fresh and fermented whey in the production of raw ewes' milk-based bryndza cheese from 8 small or medium-sized producers was analysed. Culture-based microbiological analysis and culture-independent analysis based on 16S rRNA gene sequencing by MiSeq and MinION were used. Results showed the dominance of lactococci or streptococci, with 3-8 log CFU ml-[1] of Lactobacillus sensu lato in all whey samples. Potential natural starters comprising Lacticaseibacillus paracasei/casei, Lactiplantibacillus plantarum, Lentilactobacillus parabuchneri, Lactobacillus helveticus, L. diolivorans, Levilactobacillus brevis, Limosilactobacillus fermentum, L. delbrueckii, L. gasseri and L. otakiensis were isolated. Coliforms were also present in all samples, with no consistently lower values in fermented whey samples. Some samples contained pseudomonads and/or acinetobacters. Coagulase-positive staphylococci were present at relevant levels in samples from 4 producers. The results revealed that whey is a source of natural starters due to the presence of lactobacilli.}, }
@article {pmid40152095, year = {2025}, author = {Wu, S and Luo, Y and Wei, F and Li, Y and Fan, J and Chen, Y and Zhang, W and Li, X and Xu, Y and Chen, Z and Xia, C and Hu, M and Li, P and Gu, Q}, title = {Lactic acid bacteria target NF-κB signaling to alleviate gastric inflammation.}, journal = {Food &amp; function}, volume = {16}, number = {8}, pages = {3101-3119}, doi = {10.1039/d4fo06308b}, pmid = {40152095}, issn = {2042-650X}, mesh = {Cell Line, Tumor ; Humans ; *Signal Transduction ; Lactic Acid/metabolism ; NF-kappa B/metabolism ; *Gastritis/metabolism/microbiology/pathology ; *Lactobacillaceae/physiology ; Helicobacter pylori ; *Helicobacter Infections/metabolism/microbiology/pathology ; Animals ; Mice ; Mice, Inbred C57BL ; Sulfones/pharmacology ; Nitriles/pharmacology ; Gastrointestinal Microbiome ; }, abstract = {Helicobacter pylori (H. pylori) infection and the resulting gastric inflammation are major contributors to gastric cancer development. Probiotics, particularly Lactobacillus, are promising for their anti-inflammatory potential, yet their exact mechanisms in inhibiting H. pylori-induced inflammation are unclear. In our previous study, Lactiplantibacillus plantarum ZJ316 (L. plantarum ZJ316) demonstrated strong anti-inflammatory effects against H. pylori infection in vivo, but its precise mechanisms were not fully understood. Here, we aimed to investigate how L. plantarum ZJ316 inhibits the inflammatory response to H. pylori infection. Our results demonstrated that L. plantarum ZJ316 effectively reduced the expression of pro-inflammatory cytokines in H. pylori-infected AGS cells. Mechanistically, L. plantarum ZJ316 inhibited the NF-κB signaling pathway by preventing the degradation of IκBα, suppressing p65 phosphorylation, and blocking the nuclear translocation of phosphorylated p65. Treatment with the NF-κB inhibitor BAY 11-7082 further decreased tumor necrosis factor-α (TNF-α), interleukin-8 (IL-8), and interleukin-1β (IL-1β) levels, confirming the inhibitory effect of L. plantarum ZJ316 on the NF-κB pathway. In H. pylori-infected mice, oral administration of L. plantarum ZJ316 significantly alleviated inflammatory cell infiltration, reduced TNF-α and pepsinogen II (PGII) levels, and increased interleukin-10 (IL-10) levels in serum. A comparative metagenomic analysis of the gastric microbiota revealed a decrease in Prevotella and Desulfovibrio, alongside an increase in Ligilactobacillus and Akkermansia, supporting the protective effects of L. plantarum ZJ316 and correlating with their decreased inflammatory response. In summary, administration of L. plantarum ZJ316 demonstrated robust anti-inflammatory effects against H. pylori infection by suppressing NF-κB signaling and promoting favorable changes in the gastric microbiota composition. Therefore, L. plantarum ZJ316 holds promise as a novel functional food for protecting the body against H. pylori infection.}, }
@article {pmid40150979, year = {2025}, author = {Yildirim, EA and Laptev, GY and Ilina, LA and Ponomareva, ES and Brazhnik, EA and Smetannikova, TS and Novikova, NI and Turina, DG and Filippova, VA and Dubrovin, AV and Dubrovina, AS and Kalitkina, KA and Klyuchnikova, IA and Zaikin, VA and Griffin, DK and Romanov, MN}, title = {Metagenomic Composition and Predicted Metabolic Pathway Analyses of the Endometrial and Rectal Microbiota in Dairy Cows Following the Introduction of a Complex Feed Additive.}, journal = {Frontiers in bioscience (Elite edition)}, volume = {17}, number = {1}, pages = {25725}, doi = {10.31083/FBE25725}, pmid = {40150979}, issn = {1945-0508}, support = {24-16-00131//Russian Science Foundation/ ; }, mesh = {Animals ; Cattle/microbiology ; Female ; *Animal Feed ; *Endometrium/microbiology/metabolism ; *Rectum/microbiology ; *Metabolic Networks and Pathways ; *Microbiota ; Metagenomics ; Diet/veterinary ; Gastrointestinal Microbiome ; }, abstract = {BACKGROUND: The microbiome composition in dairy cows (Bos taurus) directly impacts on health and reproductive performance. This study aimed to determine the metagenomic composition and predicted microbial community functions in the endometrium and rectal chyme of cows fed a complex feed additive (CFA). The latter included the Bacillus mucilaginosus 159 strain, a short-chain fatty acid, plus essential oils.<br><br>METHODS: Clinically healthy cows were divided into two groups (n = 15 in each): (I) a control group fed the standard diet, and (II) an experimental group. CFA was introduced into the diet of Group II during the entire transit period at a dose of 50 g per animal per day; moreover, all animals received Pen-Strep 400 antibiotics to prevent endometritis and other pathologies. The microbial community composition from the endometrium and rectal chyme biotopes was assessed using targeted next-generation sequencing.<br><br>RESULTS: Significant changes were observed in the composition and predicted metabolic pathways due to the CFA administration, with the endometrial microbiota being more responsive to CFA than the intestinal chyme microbiome. Remarkably, the Actinobacteriota representatives disappeared in the endometrium of Group II animals compared to controls, whose content ranged from 0.34 to 3.3%. The use of CFA also resulted in a less pronounced effect in four predicted metabolic pathways for microbial degradation of catechol in the endometrium compared to controls (p < 0.05).<br><br>CONCLUSIONS: Our findings support the concept of a relationship between the gut microbiome and the reproductive system microflora of cows, as we observed changes in the composition and predicted metabolic pathways of the endometrial microbiota after orally administering CFA. This emphasizes the need for an integrated approach combining the correction of microecological disorders in the intestines and the reproductive system simultaneously.}, }
@article {pmid40149936, year = {2025}, author = {Zhan, J and Cheng, J and Chang, W and Su, Y and Yue, X and Wu, C}, title = {Absolute Quantitative Metagenomic Analysis Provides More Accurate Insights for the Anti-Colitis Effect of Berberine via Modulation of Gut Microbiota.}, journal = {Biomolecules}, volume = {15}, number = {3}, pages = {}, pmid = {40149936}, issn = {2218-273X}, mesh = {*Berberine/pharmacology/therapeutic use ; *Gastrointestinal Microbiome/drug effects/genetics ; Animals ; *Metagenomics/methods ; *Colitis, Ulcerative/drug therapy/microbiology ; Bacteria/genetics/drug effects ; Male ; }, abstract = {Current gut microbiota studies often rely on relative quantitative sequencing. However, under certain circumstances, while the relative quantitative abundance of these bacteria may remain stable, the absolute quantities of specific bacteria can vary considerably. Since the function of bacteria is directly linked to their total numbers, absolute quantification is crucial. This study aims to identify the optimal method for microbiome analysis by comparing relative and absolute quantitative sequencing. Using ulcerative colitis, which is closely associated with gut microbiota, as a disease model and berberine (which affects microbiota) versus sodium butyrate (which does not) as drugs, relative and absolute quantitative methods were used to evaluate the varying effects of the different drugs on the regulation of gut microbiota in UC-affected animals. The regulatory effects of BBR on gut microbiota were further synthesized as identified in earlier studies using an individual-based meta-analysis, and we compared these findings with our absolute sequencing results. The results from absolute sequencing were more consistent with the actual microbial community, suggesting that relative abundance measurements might not accurately reflect the true abundance of microbial species. Moreover, meta-analysis results were only partially consistent with absolute quantitative sequencing and sometimes directly opposed, suggesting that relative quantitative sequencing analyses are prone to misinterpretation and incorrect correlation of results. This study underscores the importance of absolute quantitative analysis in accurately representing the true microbial counts in a sample and evaluating the modulatory effects of drugs on the microbiome, which plays a vital role in the study of the microbiome.}, }
@article {pmid40149437, year = {2025}, author = {Alharbi, SM and Al-Sulami, N and Al-Amrah, H and Anwar, Y and Gadah, OA and Bahamdain, LA and Al-Matary, M and Alamri, AM and Bahieldin, A}, title = {Metagenomic Characterization of the Maerua crassifolia Soil Rhizosphere: Uncovering Microbial Networks for Nutrient Acquisition and Plant Resilience in Arid Ecosystems.}, journal = {Genes}, volume = {16}, number = {3}, pages = {}, pmid = {40149437}, issn = {2073-4425}, mesh = {*Rhizosphere ; *Soil Microbiology ; Mycorrhizae/genetics ; Metagenomics/methods ; Bacteria/genetics/classification ; Soil/chemistry ; Ecosystem ; Plant Roots/microbiology ; Metagenome ; Microbiota ; }, abstract = {Background/Objectives:Maerua crassifolia, a threatened medicinal species endemic to drylands, exhibits a pronounced drought sensitivity. Despite the critical role of microorganisms, particularly bacteria and fungi, the microbial consortia in M. crassifolia's rhizosphere remain underexplored. Methods: Metagenomic whole genome shotgun sequencing (WGS) was employed to elucidate the taxonomic composition of bacterial and fungal communities inhabiting the soil rhizosphere of M. crassifolia. Results: The data revealed a marked predominance of bacterial genomes relative to fungal communities, as evidenced by non-redundant gene analysis. Notably, arbuscular mycorrhizal fungi (AMF), specifically Rhizophagus clarus, Rhizophagus irregularis and Funneliformis geosporum, are key rhizosphere colonizers. This study confirmed the presence of phosphate-solubilizing bacteria (PSB), such as Sphingomonas spp., Cyanobacteria and Pseudomonadota, underscoring the critical role of these microorganisms in the phosphorus cycle. Additionally, the study uncovered the presence of previously uncharacterized species within the phylum Actinobacteria, as well as unidentified taxa from the Betaproteobacteria, Gemmatimonadota and Chloroflexota phyla, which may represent novel microbial taxa with potential plant growth-promoting properties. Conclusions: Findings suggest a complex, symbiotic network where AMF facilitate phosphorus uptake through plant-root interactions. In a tripartite symbiosis, PSB enhance inorganic phosphorus solubilization, increasing bioavailability, which AMF assimilate and deliver to plant roots, optimizing nutrition. This bacterial-fungal interplay is essential for plant resilience in arid environments. Future investigations should prioritize the isolation and characterization of underexplored microbial taxa residing in the rhizosphere of M. crassifolia, with particular emphasis on members of the Actinobacteria, Betaproteobacteria, Gemmatimonadota and Chloroflexota phyla to uncover their roles in nutrient acquisition and sustainability.}, }
@article {pmid40148567, year = {2025}, author = {Austin, GI and Brown Kav, A and ElNaggar, S and Park, H and Biermann, J and Uhlemann, AC and Pe'er, I and Korem, T}, title = {Processing-bias correction with DEBIAS-M improves cross-study generalization of microbiome-based prediction models.}, journal = {Nature microbiology}, volume = {10}, number = {4}, pages = {897-911}, pmid = {40148567}, issn = {2058-5276}, support = {R01HD114715//U.S. Department of Health &amp; Human Services | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)/ ; T15 LM007079/LM/NLM NIH HHS/United States ; R01HD106017//U.S. Department of Health &amp; Human Services | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)/ ; R01 HD114715/HD/NICHD NIH HHS/United States ; U54DK104309//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; T15LM007079//U.S. Department of Health &amp; Human Services | NIH | U.S. National Library of Medicine (NLM)/ ; U54 DK104309/DK/NIDDK NIH HHS/United States ; R01 HD106017/HD/NICHD NIH HHS/United States ; }, mesh = {*Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; Humans ; *Metagenomics/methods ; *Bacteria/genetics/classification/isolation &amp; purification ; *Computational Biology/methods ; Bias ; }, abstract = {Every step in common microbiome profiling protocols has variable efficiency for each microbe, for example, different DNA extraction efficiency for Gram-positive bacteria. These processing biases impede the identification of signals that are biologically interpretable and generalizable across studies. 'Batch-correction' methods have been used to address these issues computationally with some success, but they are largely non-interpretable and often require the use of an outcome variable in a manner that risks overfitting. We present DEBIAS-M (domain adaptation with phenotype estimation and batch integration across studies of the microbiome), an interpretable framework for inference and correction of processing bias, which facilitates domain adaptation in microbiome studies. DEBIAS-M learns bias-correction factors for each microbe in each batch that simultaneously minimize batch effects and maximize cross-study associations with phenotypes. Using diverse benchmarks including 16S rRNA and metagenomic sequencing, classification and regression, and a variety of clinical and molecular targets, we demonstrate that using DEBIAS-M improves cross-study prediction accuracy compared with commonly used batch-correction methods. Notably, we show that the inferred bias-correction factors are stable, interpretable and strongly associated with specific experimental protocols. Overall, we show that DEBIAS-M facilitates improved modelling of microbiome data and identification of interpretable signals that generalize across studies.}, }
@article {pmid40147302, year = {2025}, author = {Keneally, C and Chilton, D and Dornan, TN and Kidd, SP and Gaget, V and Toomes, A and Lassaline, C and Petrovski, R and Wood, L and Brookes, JD}, title = {Multi-omics reveal microbial succession and metabolomic adaptations to flood in a hypersaline coastal lagoon.}, journal = {Water research}, volume = {280}, number = {}, pages = {123511}, doi = {10.1016/j.watres.2025.123511}, pmid = {40147302}, issn = {1879-2448}, mesh = {*Floods ; Salinity ; RNA, Ribosomal, 16S/genetics ; Geologic Sediments/microbiology ; Metabolomics ; Microbiota ; Multiomics ; }, abstract = {Microorganisms drive essential biogeochemical processes in aquatic ecosystems and are sensitive to both salinity and hydrological changes. As climate change and anthropogenic activities alter hydrology and salinity worldwide, understanding microbial ecology and metabolism becomes increasingly important for managing aquatic ecosystems. Biogeochemical processes were investigated on sediment microbial communities during a significant flood event in the hypersaline Coorong lagoon, South Australia (the largest in the Murray-Darling Basin since 1956). Samples from six sites across a salinity gradient were collected before and during flooding in 2022. To assess changes in microbial taxonomy and metabolic function, 16S rRNA amplicon sequencing was employed alongside untargeted liquid chromatography-mass spectrometry (LC-MS) to assess changes in microbial taxonomy and metabolic function. Results showed a decrease in microbial richness and diversity during flooding, especially in hypersaline conditions. Pre-flood communities were enriched with osmolyte-degrading and methanogenic taxa, alongside osmoprotectant metabolites, such as glycine betaine and choline. Flood conditions favored taxa such as Halanaerobiaceae and Beggiatoaceae, inducing inferred metagenomic shifts indicative of sulfur cycling and nitrogen reduction pathways, while also enriching a greater diversity of metabolites including Gly-Phe dipeptides and guanine. This study demonstrates that integrating metabolomics with microbial community analysis enhances understanding of ecosystem responses to disturbance. These findings suggest microbial communities rapidly change in response to salinity reductions while maintaining key biogeochemical functions. Such insights are valuable for ecosystem management and predictive modelling under environmental stressors such as flooding.}, }
@article {pmid40147232, year = {2025}, author = {Wang, J and Ge, Y}, title = {Unveiling the latitudinal dependency of global patterns in soil prokaryotic gene content.}, journal = {The Science of the total environment}, volume = {974}, number = {}, pages = {179224}, doi = {10.1016/j.scitotenv.2025.179224}, pmid = {40147232}, issn = {1879-1026}, mesh = {*Soil Microbiology ; *Metagenome ; Soil/chemistry ; Bacteria/genetics ; Microbiota ; }, abstract = {Prokaryotic genomic traits offer insights into their functional roles, evolutionary processes, and ecological interactions, but global patterns in soil microbial genomes remain poorly understood. In this study, we examined 6436 metagenome-assembled genomes (MAGs) from global soil environments to explore the driving factors of prokaryotic gene content. Through random forest analysis, we found that, among numerous potential influencing factors such as climate, soil physicochemical properties, and human activities, geographic latitude was the primary factor affecting prokaryotic gene content. Our results showed a marked decrease in gene content from the tropics to the poles, with polar MAGs containing 10.4 % and 13.3 % fewer genes than those in tropical and temperate zones, respectively. This decline correlates with shifts in key metabolic processes, such as nitrogen fixation and energy conversion. Furthermore, we assessed interspecies metabolic interactions using Metabolic Resource Overlap (MRO) and Metabolic Interaction Potential (MIP) metrics. Our analysis revealed significantly lower MRO in high-latitude microbial communities, yet comparable MIP values to those in lower latitudes, indicating that reduced competition may contribute to genomic streamlining. These findings highlight the significant influence of latitude and interspecies interactions on microbial genomic characteristics, advancing our comprehension of microbial ecological adaptations.}, }
@article {pmid40146796, year = {2025}, author = {Li, J and Zhu, Y and Chang, Q and Gong, Y and Wan, J and Xu, S}, title = {Comparative Analysis of Microbiological Profiles and Antibiotic Resistance Genes in Subjects with Colorectal Cancer and Healthy Individuals.}, journal = {Polish journal of microbiology}, volume = {74}, number = {1}, pages = {71-81}, pmid = {40146796}, issn = {2544-4646}, mesh = {Humans ; *Colorectal Neoplasms/microbiology ; Male ; Middle Aged ; Female ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; *Gastrointestinal Microbiome/genetics ; Aged ; Feces/microbiology ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; *Drug Resistance, Microbial/genetics ; Case-Control Studies ; }, abstract = {Alteration of the gut microbiota (GM) is associated with various diseases, including colorectal cancer (CRC). With the development of next-generation sequencing techniques, metagenomic sequencing, along with metabolic function and antibiotic-resistant gene analyses, has been used to investigate differences in GM between CRC patients and healthy controls. Fecal samples were obtained from seven CRC patients and six healthy subjects, and the sequencing data were analyzed for similarity, a-diversity, principal component analysis (PCA), and linear discriminant analyses (LDA). Regarding Actinobacteria, 3 orders, 5 families, 9 genera, and 19 species were identified with no differences between the CRC and control groups, while the levels of Bifidobacterium bifidum and Bifidobacterium dentium were higher, and the level of Bifidobacterium breve was lower in the CRC group compared to the healthy controls (p = 0.053). Otherwise, 2 genera (Leuco-nostoc and Salmonella) and 7 species of bacteria (Parabacteroides merdae, Alistipes shahii, Alistipes finegoldii, Clostridium nexile, Salmonella enterica, unclassified Salmonella, Enterobacter cloacae) were found to be significantly differently distributed between CRC patients and healthy controls. PCA-LDA successfully classified these 2 groups with satisfactory accuracy (84.52% for metabolic function and 77.38% for resistant genes). These findings underscore the potential of GM as a diagnostic tool for CRC, offering a promising avenue for non-invasive screening and risk assessment. The identification of specific microbial signatures, particularly those linked to metabolic functions and resistance traits, could open new doors for understanding the role of the microbiome in CRC progression and treatment resistance.}, }
@article {pmid40145240, year = {2025}, author = {Zhou, Y and Oba, K and Xu, T and Kuroiwa, M and Hori, T and Terada, A}, title = {Actively N2O-Reducing Oxygen-Tolerant Microbial Consortium Attained by Using a High-Dilution-Rate Chemostat Fed with Methanol.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {13}, pages = {6673-6685}, doi = {10.1021/acs.est.4c12732}, pmid = {40145240}, issn = {1520-5851}, mesh = {Methanol/metabolism ; *Nitrous Oxide/metabolism ; Oxygen/metabolism ; *Microbial Consortia ; Bacteria/metabolism ; Oxidation-Reduction ; }, abstract = {Nitrous oxide-reducing bacteria (N2ORB) are generally considered the only biological sink for the potent greenhouse gas N2O. Although N2O consumption activities by diverse heterotrophic N2ORB have been detected, knowledge gaps remain about the phylogenies, physiologies, and activities of N2ORB. Here, we successfully enriched a methylotrophic N2ORB consortium under intermittent oxygen and N2O supplies. [15]N tracer analysis showed that the N2O consumption activity of the enriched consortium was higher than its N2O production activity in the presence of either a single or multiple electron acceptors (i.e., nitrogen oxides). The observed maximum N2O consumption was 80.7 μmol·g-biomass[-1]·h[-1]. Quantitative PCR results showed that clade I nosZ bacteria overwhelmed clade II nosZ bacteria at high (0.41 mmol·min[-1]) and low (0.08 mmol·min[-1]) N2O loading rates. The dilution rate and N2O loading rate affected the microbial community composition and activity. A higher N2O loading rate stimulated active and oxygen-tolerant N2ORB that boosted N2O consumption by approximately 50% in the presence of oxygen. Metagenomic analysis unraveled the predominance of a novel methylotrophic N2ORB, possessing entire denitrifying genes and high-affinity terminal oxidase genes, from the reactor with a high N2O loading rate. The unique physiological traits of the consortium enriched by methanol shed light on a novel function─aerobic N2O consumption by N2ORB─and pave the way for innovative N2O mitigation strategies applying powerful N2O sinks in engineered systems.}, }
@article {pmid40144403, year = {2025}, author = {Li, Z and Zou, D and Liu, R and Pan, J and Huang, J and Ma, J and Huang, L and He, J and Fu, L and Zheng, X and Wang, M and Fang, J and Dong, H and Li, M and Huang, L and Dai, X}, title = {A hunting ground for predatory bacteria at the Zhenbei seamount in the South China Sea.}, journal = {ISME communications}, volume = {5}, number = {1}, pages = {ycaf042}, pmid = {40144403}, issn = {2730-6151}, abstract = {Seamounts are critical marine biodiversity hot spots, while the metabolic activity of their microbial community remains largely unknown. In this study, we investigated the diversity and activity of free-living and particle-attached microorganisms in the surface, middle, and bottom layers of seawater at the Zhenbei seamount in the South China Sea using omics approaches, including 16S ribosomal RNA (rRNA)/16S rDNA ratio analysis. Over 20 phyla were detected, with Proteobacteria, Actinobacteriota, Cyanobacteria, Bacteroidota, Thaumarchaeota, and Planctomycetota being predominant. Surprisingly, Bdellovibrionota and Myxococcota, the two well-known predatory bacteria, exhibited exceptionally higher rRNA/rDNA ratios than the other phyla, with rRNA abundances being 10- or even 200-fold higher than their rDNA abundances. These metabolically active predatory bacteria are mainly uncultured species. A total of 23 Myxococcota metagenome-assembled genomes (MAGs) and 12 Bdellovibrionota MAGs were assembled. The most highly overexpressed genes frequently detected in these MAGs were those that encode flagellum and pilus proteins as well as T4-like virus tail tube protein, indicating that these predator bacteria were likely active in hunting. Our results suggest that seamounts may serve as hunting grounds for predatory bacteria, which may be involved in controlling the flows of elements and energy in the seamount microbial communities and, thus, in shaping the seamount ecosystems.}, }
@article {pmid40142589, year = {2025}, author = {Chen, X and Gao, L and Kou, Y and Wang, X and Li, X and He, H and Wang, M}, title = {Composition, Distribution and Mobility Potential of the Antibiotic Resistome in Sediments from the East China Sea Revealed by Metagenomic Analysis.}, journal = {Microorganisms}, volume = {13}, number = {3}, pages = {}, pmid = {40142589}, issn = {2076-2607}, support = {41806131//National Natural Science Foundation of China/ ; 42120104006//National Natural Science Foundation of China/ ; ZR2024QD036//Natural Science Foundation of Shandong Province/ ; }, abstract = {Marine sediments are recognized as crucial reservoirs of antibiotic resistance genes (ARGs). However, the antibiotic resistome in sediments of the East China Sea, an area heavily impacted by human activities, has not been thoroughly studied. Here, we conducted a systematic investigation into the antibiotic resistome in these sediments using metagenomic analysis. Overall, we detected eighty ARG subtypes and nineteen ARG types. Beta-lactams were the dominant ARG type, and Gammaproteobacteria was the main ARG host in this study. Mobile genetic elements (MGEs) were not major drivers of ARG profiles. Although the ARG host communities significantly differed between the spring and autumn (p < 0.05), the antibiotic resistome remained stable across the two seasons. The assembly of ARGs and their hosts was governed by stochastic processes, and a high ratio of stochastic processes implied its crucial role in the assembly and stabilization of the antibiotic resistome. Co-occurrence network analysis revealed an important role of Deltaproteobacteria in the stabilization of ARG profiles across seasons. Environmental parameters (e.g., temperature and density) played certain roles in the stabilization of the antibiotic resistome between spring and autumn. Moreover, nine human pathogen bacteria (HPB) were detected in this study. We also found that the health risks caused by ARGs were relatively higher in the spring. Our results will provide a strong foundation for the development of targeted management strategies to mitigate the further dissemination and spread of ARGs in marine sediments.}, }
@article {pmid40141768, year = {2025}, author = {Ghobashy, MOI and Al-Otaibi, AS and Alharbi, BM and Alshehri, D and Ghabban, H and Albalawi, DA and Alenzi, AM and Alatawy, M and Alatawi, FA and Algammal, AM and Mir, R and Mahrous, YM}, title = {Metagenomic Characterization of Microbiome Taxa Associated with Coral Reef Communities in North Area of Tabuk Region, Saudia Arabia.}, journal = {Life (Basel, Switzerland)}, volume = {15}, number = {3}, pages = {}, pmid = {40141768}, issn = {2075-1729}, support = {Research no.0144-1444-S//Deanship of Research and Graduate Studies at University of Tabuk/ ; }, abstract = {The coral microbiome is highly related to the overall health and the survival and proliferation of coral reefs. The Red Sea's unique physiochemical characteristics, such a significant north-south temperature and salinity gradient, make it a very intriguing research system. However, the Red Sea is rather isolated, with a very diversified ecosystem rich in coral communities, and the makeup of the coral-associated microbiome remains little understood. Therefore, comprehending the makeup and dispersion of the endogenous microbiome associated with coral is crucial for understanding how the coral microbiome coexists and interacts, as well as its contribution to temperature tolerance and resistance against possible pathogens. Here, we investigate metagenomic sequencing targeting 16S rRNA using DNAs from the sediment samples to identify the coral microbiome and to understand the dynamics of microbial taxa and genes in the surface mucous layer (SML) microbiome of the coral communities in three distinct areas close to and far from coral communities in the Red Sea. These findings highlight the genomic array of the microbiome in three areas around and beneath the coral communities and revealed distinct bacterial communities in each group, where Pseudoalteromonas agarivorans (30%), Vibrio owensii (11%), and Pseudoalteromonas sp. Xi13 (10%) were the most predominant species in samples closer to coral (a coral-associated microbiome), with the domination of Pseudoalteromonas_agarivorans and Vibrio_owensii in Alshreah samples distant from coral, while Pseudoalteromonas_sp._Xi13 was more abundant in closer samples. Moreover, Proteobacteria such as Pseudoalteromonas, Pseudomonas and Cyanobacteria were the most prevalent phyla of the coral microbiome. Further, Saweehal showed the highest diversity far from corals (52.8%) and in Alshreah (7.35%) compared to Marwan (1.75%). The microbial community was less diversified in the samples from Alshreah Far (5.99%) and Marwan Far (1.75%), which had comparatively lower values for all indices. Also, Vibrio species were the most prevalent microorganisms in the coral mucus, and the prevalence of these bacteria is significantly higher than those found in the surrounding saltwater. These findings reveal that there is a notable difference in microbial diversity across the various settings and locales, revealing that geographic variables and coral closeness affect the diversity of microbial communities. There were significant differences in microbial community composition regarding the proximity to coral. In addition, there were strong positive correlations between genera Pseudoalteromonas and Vibrio in close-to-coral environments, suggesting that these bacteria may play a synergistic role in Immunizing coral, raising its tolerance towards environmental stress and overall coral health.}, }
@article {pmid40140988, year = {2025}, author = {Yan, Q and Huang, L and Li, S and Zhang, Y and Guo, R and Zhang, P and Lei, Z and Lv, Q and Chen, F and Li, Z and Meng, J and Li, J and Wang, G and Chen, C and Ullah, H and Cheng, L and Fan, S and You, W and Zhang, Y and Ma, J and Sha, S and Sun, W}, title = {The Chinese gut virus catalogue reveals gut virome diversity and disease-related viral signatures.}, journal = {Genome medicine}, volume = {17}, number = {1}, pages = {30}, pmid = {40140988}, issn = {1756-994X}, mesh = {Humans ; *Virome ; *Gastrointestinal Microbiome/genetics ; Male ; *Viruses/genetics/classification ; Female ; Metagenome ; Feces/virology ; China ; Genome, Viral ; Adult ; Middle Aged ; Metagenomics/methods ; East Asian People ; }, abstract = {BACKGROUND: The gut viral community has been increasingly recognized for its role in human physiology and health; however, our understanding of its genetic makeup, functional potential, and disease associations remains incomplete.<br><br>METHODS: In this study, we collected 11,286 bulk or viral metagenomes from fecal samples across large-scale Chinese populations to establish a Chinese Gut Virus Catalogue (cnGVC) using a de novo virus identification approach. We then examined the diversity and compositional patterns of the gut virome in relation to common diseases by analyzing 6311 bulk metagenomes representing 28 disease or unhealthy states.<br><br>RESULTS: The cnGVC contains 93,462 nonredundant viral genomes, with over 70% of these being novel viruses not included in existing gut viral databases. This resource enabled us to characterize the functional diversity and specificity of the gut virome. Using cnGVC, we profiled the gut virome in large-scale populations, assessed sex- and age-related variations, and identified 4238 universal viral signatures of diseases. A random forest classifier based on these signatures achieved high accuracy in distinguishing diseased individuals from controls (AUC&#x2009;=&#x2009;0.698) and high-risk patients from controls (AUC&#x2009;=&#x2009;0.761), and its predictive ability was also validated in external cohorts.<br><br>CONCLUSIONS: Our resources and findings significantly expand the current understanding of the human gut virome and provide a comprehensive view of the associations between gut viruses and common diseases. This will pave the way for novel strategies in the treatment and prevention of these diseases.}, }
@article {pmid40140706, year = {2025}, author = {Best, L and Dost, T and Esser, D and Flor, S and Gamarra, AM and Haase, M and Kadibalban, AS and Marinos, G and Walker, A and Zimmermann, J and Simon, R and Schmidt, S and Taubenheim, J and Künzel, S and Häsler, R and Franzenburg, S and Groth, M and Waschina, S and Rosenstiel, P and Sommer, F and Witte, OW and Schmitt-Kopplin, P and Baines, JF and Frahm, C and Kaleta, C}, title = {Metabolic modelling reveals the aging-associated decline of host-microbiome metabolic interactions in mice.}, journal = {Nature microbiology}, volume = {10}, number = {4}, pages = {973-991}, pmid = {40140706}, issn = {2058-5276}, support = {859890//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; FOR5042//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; EXC2167//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; 416 418087534//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; }, mesh = {Animals ; Mice ; *Aging/metabolism ; *Gastrointestinal Microbiome/physiology ; Metabolomics ; *Host Microbial Interactions ; Bacteria/metabolism/genetics/classification ; Mice, Inbred C57BL ; Metagenomics ; Male ; }, abstract = {Aging is accompanied by considerable changes in the gut microbiome, yet the molecular mechanisms driving aging and the role of the microbiome remain unclear. Here we combined metagenomics, transcriptomics and metabolomics from aging mice with metabolic modelling to characterize host-microbiome interactions during aging. Reconstructing integrated metabolic models of host and 181 mouse gut microorganisms, we show a complex dependency of host metabolism on known and previously undescribed microbial interactions. We observed a pronounced reduction in metabolic activity within the aging microbiome accompanied by reduced beneficial interactions between bacterial species. These changes coincided with increased systemic inflammation and the downregulation of essential host pathways, particularly in nucleotide metabolism, predicted to rely on the microbiota and critical for preserving intestinal barrier function, cellular replication and homeostasis. Our results elucidate microbiome-host interactions that potentially influence host aging processes. These pathways could serve as future targets for the development of microbiome-based anti-aging therapies.}, }
@article {pmid40140705, year = {2025}, author = {Garrido-Sanz, D and Keel, C}, title = {Seed-borne bacteria drive wheat rhizosphere microbiome assembly via niche partitioning and facilitation.}, journal = {Nature microbiology}, volume = {10}, number = {5}, pages = {1130-1144}, pmid = {40140705}, issn = {2058-5276}, mesh = {*Triticum/microbiology ; *Rhizosphere ; Soil Microbiology ; *Microbiota/genetics ; *Seeds/microbiology ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Metagenomics ; Plant Roots/microbiology ; }, abstract = {Microbial communities play a crucial role in supporting plant health and productivity. Reproducible, natural plant-associated microbiomes can help disentangle microbial dynamics across time and space. Here, using a sequential propagation strategy, we generated a complex and reproducible wheat rhizosphere microbiome (RhizCom) to study successional dynamics and interactions between the soil and heritable seed-borne rhizosphere microbiomes (SbRB) in a microcosm. Using 16S rRNA sequencing and genome-resolved shotgun metagenomics, we find that SbRB surpassed native soil microbes as the dominant rhizosphere-associated microbiome source. SbRB genomes were enriched in host-associated traits including degradation of key saccharide (niche partitioning) and cross-feeding interactions that supported partner strains (niche facilitation). In vitro co-culture experiments confirmed that helper SbRB strains facilitated the growth of partner bacteria on disaccharides as sole carbon source. These results reveal the importance of seed microbiota dynamics in microbial succession and community assembly, which could inform strategies for crop microbiome manipulation.}, }
@article {pmid40140473, year = {2025}, author = {Brown, AA and Widdowson, M and Brandt, S and Mohammadzadeh, P and Rosenberg, JB and Jepsen, JRM and Ebdrup, BH and Hernández-Lorca, M and Bønnelykke, K and Chawes, B and Stokholm, J and Thorsen, J and Ibrahimi, P and Li, X and Sørensen, SJ and Rasmussen, MA}, title = {Associations of the gut microbiome and inflammatory markers with mental health symptoms: a cross-sectional study on Danish adolescents.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {10378}, pmid = {40140473}, issn = {2045-2322}, mesh = {Humans ; Adolescent ; *Gastrointestinal Microbiome ; Male ; Cross-Sectional Studies ; Female ; Denmark/epidemiology ; *Inflammation/metabolism/microbiology ; Biomarkers/metabolism ; *Attention Deficit Disorder with Hyperactivity/microbiology ; Depression/microbiology ; Anxiety/microbiology ; *Mental Health ; Feces/microbiology ; }, abstract = {Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder that often persists into adulthood and is accompanied by comorbid mental health problems. This cross-sectional cohort study analyzed 411 18-year-olds from the Danish COPSAC2000 birth cohort to investigate the relationship between the gut microbiome, fasting and postprandial systemic inflammation, ADHD symptoms, and symptoms of anxiety, stress, and depression. ADHD was assessed using the Adult ADHD Self-Report Scale (ASRS), while depression, stress, and anxiety were evaluated with the Depression, Anxiety, and Stress Scale 21 (DASS-21). Fecal metagenomic data and inflammation levels, measured as glycosylated protein A (GlycA), were analyzed following a standardized meal challenge. In males, higher ADHD symptom scores correlated significantly with increased abundance of a tryptophan biosynthesis pathway (MetaCyc Metabolic Pathways Database) and elevated fasting and postprandial GlycA levels (p < 0.05). While the severity of depression, anxiety, and stress symptoms showed weak associations with GlycA and the gut microbiome, our findings indicate a significant link between ADHD symptoms and postprandial inflammation, warranting further investigation into underlying mechanisms.}, }
@article {pmid40139249, year = {2025}, author = {Taylor, JT and Lee, V and Dearlove, T and Jolly, M and Wierenga, JR and Dubrulle, J and Hodgkinson-Bean, J and Hunter, S and Gartrell, B and Morgan, K and McInnes, K and French, N and Holmes, EC and Geoghegan, JL}, title = {A Metagenomic Investigation into Apteryx rowi Dermatosis Identifies Multiple Novel Viruses and a Highly Abundant Nematode.}, journal = {Journal of wildlife diseases}, volume = {61}, number = {2}, pages = {382-395}, doi = {10.7589/JWD-D-24-00115}, pmid = {40139249}, issn = {1943-3700}, mesh = {Animals ; *Nematoda/isolation &amp; purification/genetics ; Metagenomics ; *Bird Diseases/parasitology/virology ; *Nematode Infections/veterinary/parasitology ; *Viruses/isolation &amp; purification/classification ; Female ; Male ; }, abstract = {Sporadic cases of dermatosis have been reported in wild Ōkārito Rowi (Apteryx rowi), a species of brown kiwi, for over a decade. The disease exhibits distinctive features, including lesions, lichenification, and feather loss. Swab samples and full-thickness skin biopsies were collected during a survey of affected kiwi in 2023 for a metatranscriptome-based, total infectome investigation to identify any possible microbial agents associated with the disease. Our approach identified novel viruses as well as a species of nematode in high relative abundance. We found a highly abundant hepacivirus within the Flaviviridae, but only in some mild cases of dermatitis across all sample types, and in both active and chronic infections. In addition, we found a significant shift in the taxonomic composition of the nonviral microbiome within severe chronic dermatitis cases, particularly an increased abundance of transcripts from a Eucoleus sp. parasitic. Although determining the primary cause of disease in critically endangered wildlife such as Rowi remains challenging, our detection of novel and highly abundant microorganisms opens new lines of inquiry to investigate their potential association with dermatosis in this nationally iconic species.}, }
@article {pmid40138872, year = {2025}, author = {Liang, T and Jiang, T and Liang, Z and Li, L and Chen, Y and Chen, T and Yang, L and Zhang, N and Dong, B and Xie, X and Gu, B and Wu, Q}, title = {Gut microbiota-driven BCAA biosynthesis via Staphylococcus aureus -expressed acetolactate synthase impairs glycemic control in type 2 diabetes in South China.}, journal = {Microbiological research}, volume = {296}, number = {}, pages = {128145}, doi = {10.1016/j.micres.2025.128145}, pmid = {40138872}, issn = {1618-0623}, mesh = {*Diabetes Mellitus, Type 2/microbiology/metabolism ; *Gastrointestinal Microbiome/physiology ; *Staphylococcus aureus/enzymology/genetics/metabolism ; *Amino Acids, Branched-Chain/biosynthesis ; *Acetolactate Synthase/metabolism/genetics ; Humans ; Animals ; Mice ; China ; Male ; Insulin Resistance ; Female ; Middle Aged ; *Glycemic Control ; Blood Glucose ; Feces/microbiology ; Staphylococcal Infections/microbiology ; Metagenomics ; Prediabetic State/microbiology ; Metabolomics ; Insulin ; }, abstract = {An increase in branched-chain amino acid (BCAA) levels can result in insulin resistance at different stages of type 2 diabetes (T2D), however, the causes of this increase are unclear. We performed metagenomics and metabolomics profiling in patients with prediabetes (PDM), newly diagnosed diabetes (NDDM), and post-medication type 2 diabetes (P2DM) to investigate whether altered gut microbes and metabolites could explain the specific clinical characteristics of different disease stages of T2D. Here we identify acetolactate synthase (ALS) a BCAA biosynthesis enzyme in Staphylococcus aureus as a cause of T2D insulin resistance. Compared with healthy peoples, patients with PDM, NDDM, and P2DM groups, especially in P2DM group, have increased faecal numbers of S. aureus. We also demonstrated that insulin administration may be a risk factor for S. aureus infection in T2D. The presence of ALS-positive S. aureus correlated with the levels of BCAAs and was associated with an increased fasting blood glucose (FBG) and insulin resistance. Humanized microbiota transplantation experiment indicated that ALS contributes to disordered insulin resistance mediated by S. aureus. We also found that S. aureus phage can reduced the FBG levels and insulin resistance in db/db mice. The ALS-positive S. aureus are associated with insulin resistance in T2D, opening a new therapeutic avenue for the prevention or treatment of diabetes.}, }
@article {pmid40138008, year = {2025}, author = {Davasaz Tabrizi, E and Sevil, M and Arican, E}, title = {Bioinformatic strategies in metagenomics of chronic prostatitis.}, journal = {World journal of urology}, volume = {43}, number = {1}, pages = {188}, pmid = {40138008}, issn = {1433-8726}, mesh = {Male ; Humans ; *Prostatitis/microbiology/urine ; Adult ; *Computational Biology/methods ; *Metagenomics/methods ; Chronic Disease ; *Microbiota ; Middle Aged ; Young Adult ; Case-Control Studies ; Virulence Factors/genetics ; }, abstract = {PURPOSE: Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) is a prevalent urological condition in young men, significantly affecting quality of life due to persistent discomfort and neuropsychological symptoms. Despite its high prevalence, the etiology of CP/CPPS remains poorly understood. This study investigated urinary microbiota differences between CP/CPPS patients and healthy controls to identify microbial contributors, antibiotic resistance genes (ARGs), and virulence factors of dominant bacteria, as well as to explore potential therapeutic targets.<br><br>METHODS: Urine samples were collected from 58 CP/CPPS patients and 25 controls. Symptom severity was assessed by a specialist urologist using the NIH Chronic Prostatitis Symptom Index and UPOINT classification. Bacterial-specific 16&#xa0;S rRNA sequencing was performed using nanopore technology, with bioinformatics analyses conducted via ONT guppy 5.0.11, NCBI and SLV 16&#xa0;S bacterial taxonomic databases, UPGMA hierarchical clustering, and the Bacterial and Viral Bioinformatics Resource Center (BV-BRC). Pairwise comparisons were analyzed using the Mann-Whitney U test.<br><br>RESULTS: Distinct microbial diversity patterns were observed between patients and controls. Bacillus species were significantly enriched in CP/CPPS patients, while Enterococcus species predominated in controls. Younger patients exhibited unique microbiome profiles compared to older groups. Bioinformatics analyses identified ARGs and virulence factors associated with Bacillus species, implicating them in localized inflammation. Antibiotics like pleuromutilin or vancomycin were identified as potential therapeutic options, though experimental validation was beyond the study's scope.<br><br>CONCLUSION: These findings highlight microbial imbalances and provide a foundation for microbiome-targeted therapeutic strategies for CP/CPPS management in the future. Additionally, the identification of bacterial virulence factors and ARG provides insights into the potential mechanisms driving persistent symptoms. Future research with larger cohorts and experimental validation of the suggested therapeutic options may contribute to more effective treatment for CP/CPPS.}, }
@article {pmid40137713, year = {2025}, author = {Shaw, CA and Soltero-Rivera, M and Profeta, R and Weimer, BC}, title = {Case Report: Shift from Aggressive Periodontitis to Feline Chronic Gingivostomatitis Is Linked to Increased Microbial Diversity.}, journal = {Pathogens (Basel, Switzerland)}, volume = {14}, number = {3}, pages = {}, pmid = {40137713}, issn = {2076-0817}, support = {UL1 TR001860/NH/NIH HHS/United States ; }, mesh = {Animals ; Cats ; *Microbiota/genetics ; *Cat Diseases/microbiology/pathology ; *Stomatitis/microbiology/veterinary/pathology ; *Aggressive Periodontitis/microbiology/veterinary/pathology ; Male ; Disease Progression ; Mouth/microbiology ; High-Throughput Nucleotide Sequencing ; Metagenomics ; *Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Aggressive Periodontitis (AP) and Feline Chronic Gingivostomatitis (FCGS) are two oral inflammatory diseases in cats with unknown etiology. Both conditions present with severe inflammation of the oral cavity and in FCGS it is found with additional deterioration of the non-keratinized mucosa. The oral microbiome is increasingly implicated in disease progression, but little is known about shifts in the microbial community during the AP and FCGS progression. To that end, we used deep metagenomic sequencing with total RNA on three longitudinal samples of the oral microbiome in a cat first diagnosed with AP that progressed to FCGS. This deep sequencing approach revealed that increased diversity at both the genus and species levels marked the shift from AP to FCGS, including increases in Porphyromonas and Treponema species, and decreased Streptobacillus species. The metatranscriptomes were then probed for expression of antimicrobial resistance genes and virulence factors. Disease-related genes that include cheY, and ompP5 were expressed in early AP and FCGS, while others like galU were only expressed in one or the other disease state. Both genus and species-level shifts were observed along the longitudinal microbiome samples with a noted increase in species diversity in the FCGS-associated microbiome. Corroborating that functional shifts accompany taxonomic changes, the AMR and virulence factor expression similarly changed between the sampling points. Together, these taxonomic and functional shifts indicate that AP and FCGS are potentially linked and may be marked by changes in the oral microbiome, which supports the development of microbial-based clinical diagnostics and therapeutics.}, }
@article {pmid40136549, year = {2025}, author = {Pizzi, S and Conti, A and Di Canito, A and Casagrande Pierantoni, D and Foschino, R and Setati, ME and Vigentini, I}, title = {Endophytic Diversity in Vitis vinifera with Different Vineyard Managements and Vitis sylvestris Populations from Northern Italy: A Comparative Study of Culture-Dependent and Amplicon Sequencing Methods.}, journal = {Biology}, volume = {14}, number = {3}, pages = {}, pmid = {40136549}, issn = {2079-7737}, support = {150549//Italy/South Africa Joint Research Programme (ISARP) 2023-2025/ ; }, abstract = {This study aimed to investigate the endophytic microbial populations associated with wild and domesticated grapevines using both culture-based and culture-independent methods. Through culture-based methods, 148 endophytes were identified. The dominant fungal species included Aureobasidium pullulans, Alternaria alternata, and Cladosporium allicinum, while predominant bacterial species were Ralstonia pikettii, Nocardia niigatensis, and Sphingomonas echinoides. Culture-independent methods employed metagenomic techniques to explore microbial biodiversity, focusing on targeted amplification of bacterial 16S rRNA as well as fungal ITS and 26S rRNA gene regions. The main bacterial species identified included Halomonas sp., Sphingomonas sp. and Massilia sp., whereas the fungal population was dominated by Cladosporium sp., Malassezia sp. and Mucor sp. The findings revealed that vineyard management practices did not lead to statistically significant variations in microbial communities. The consistent presence of these genera across all samples suggests that they are stable components of the grapevine endophytic microbiota, remaining relatively unaffected by external environmental factors.}, }
@article {pmid40135668, year = {2025}, author = {Nassar, R and Nassar, M and Mohamed, L and Senok, A and Williams, D}, title = {Characterization and ex vivo modelling of endodontic infections from the Arabian Gulf region.}, journal = {International endodontic journal}, volume = {58}, number = {7}, pages = {1091-1108}, pmid = {40135668}, issn = {1365-2591}, support = {MBRU-CMRG2020-11//Mohammed Bin Rashid University of Medicine and Health Sciences/ ; 2201100262//University of Sharjah/ ; }, mesh = {Humans ; *Biofilms/growth &amp; development ; *Dental Pulp Necrosis/microbiology ; Adult ; *Dental Pulp Cavity/microbiology ; Male ; Female ; Microbiota ; Metagenomics ; Middle Aged ; }, abstract = {AIM: The microbiota of endodontic infections in patients from the Arabian Gulf region (AGR) is largely unexplored. While research in different global regions has investigated the microbial composition of such infections, studies using shotgun metagenomic sequencing (SMS) alongside culture-dependent techniques (CDT) are limited. There are also few in vitro biofilm models that reflect the microbial profiles of endodontic infections. Therefore, by employing SMS and CDT, this research aimed to explore compositional and functional microbial profiles of endodontic infections from the AGR. The research also sought to develop ex vivo biofilms directly from endodontic infection samples.<br><br>METHODOLOGY: SMS and CDT were used to analyze 32 root canal samples from necrotic pulp. Patients' samples were categorized into two cohorts: symptomatic (n&#x2009;=&#x2009;19) and asymptomatic (n&#x2009;=&#x2009;13). Samples underwent sequencing followed by bioinformatic analysis to investigate microbial composition, resistome, virulome, and functional differences. Two representative samples (8R, 15R) were selected to develop ex vivo biofilms on hydroxyapatite coupons. Similarity between inoculum and developed biofilms was assessed using SMS and CDT. The reproducibility of developed biofilms was assessed based on microbial composition and relative abundance at the species level using correlation coefficient analysis.<br><br>RESULTS: Endodontic samples had high bacterial diversity, with a total of 366 bacterial species detected across the two cohorts. Several antibiotic resistance (n&#x2009;=&#x2009;59) and virulence (n&#x2009;=&#x2009;82) genes were identified, with no significant differences between the cohorts. CDT identified 28 bacterial species, with 71.4% of the isolated bacteria having phenotypic resistance to clinically relevant antibiotics. SMS showed that the ex vivo biofilms were polymicrobial. Biofilm derived from sample 15R had 9 species and was dominated by Enterococcus faecalis, while sample 8R had 12 species and was dominated by Streptococcus mutans. Pearson correlation analysis demonstrated a significant positive correlation between biological biofilm replicates, confirming the reproducibility of biofilm formation.<br><br>CONCLUSIONS: There was high bacterial diversity in root canal samples from necrotic pulp. Samples were shown to contain antibiotic resistance and virulence genes, with no differences evident between symptomatic and asymptomatic infections. A high number of isolated bacteria were resistant to clinically used antibiotics. Ex vivo biofilm models from clinical samples were successfully developed and reproducibly reflected a polymicrobial composition.}, }
@article {pmid40135504, year = {2025}, author = {Pelto, J and Auranen, K and Kujala, JV and Lahti, L}, title = {Elementary methods provide more replicable results in microbial differential abundance analysis.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {2}, pages = {}, pmid = {40135504}, issn = {1477-4054}, support = {952914//European Union's Horizon 2020 research and innovation programme/ ; }, mesh = {RNA, Ribosomal, 16S/genetics ; *Microbiota/genetics ; *Metagenomics/methods ; Humans ; *Computational Biology/methods ; Reproducibility of Results ; }, abstract = {Differential abundance analysis (DAA) is a key component of microbiome studies. Although dozens of methods exist, there is currently no consensus on the preferred methods. While the correctness of results in DAA is an ambiguous concept and cannot be fully evaluated without setting the ground truth and employing simulated data, we argue that a well-performing method should be effective in producing highly reproducible results. We compared the performance of 14 DAA methods by employing datasets from 53 taxonomic profiling studies based on 16S rRNA gene or shotgun metagenomic sequencing. For each method, we examined how the results replicated between random partitions of each dataset and between datasets from separate studies. While certain methods showed good consistency, some widely used methods were observed to produce a substantial number of conflicting findings. Overall, when considering consistency together with sensitivity, the best performance was attained by analyzing relative abundances with a nonparametric method (Wilcoxon test or ordinal regression model) or linear regression/t-test. Moreover, a comparable performance was obtained by analyzing presence/absence of taxa with logistic regression.}, }
@article {pmid40133298, year = {2025}, author = {Bhanu, P and Buchke, S and Hemandhar-Kumar, N and Varsha, P and Kiran, SKR and Vikneswaran, G and Alva, A and Basavaraj, GS and Kumar, J}, title = {Comparative metagenomic analysis of the oral microbiome in COVID-19 patients and healthy individuals.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {10303}, pmid = {40133298}, issn = {2045-2322}, support = {20210001//Bangalore Bioinnovation Centre/ ; }, mesh = {Humans ; *COVID-19/microbiology/virology ; *Mouth/microbiology ; *Microbiota/genetics ; *Metagenomics/methods ; SARS-CoV-2 ; Male ; Female ; Adult ; Middle Aged ; Case-Control Studies ; }, abstract = {COVID-19, caused by SARS-CoV-2, affects multiple body systems, including the oral cavity, where it may disrupt the oral microbiome in ways that contribute to disease pathology. Understanding the long-term interaction between SARS-CoV-2 and the oral microbiome is crucial, as it may reveal microbial markers valuable for diagnosing or monitoring persistent health issues in COVID-19 survivors. Metagenomic sequencing revealed significant microbial shifts in the oral microbiome of COVID-19 patients, showing reduced microbial diversity and increased prevalence of opportunistic pathogens compared to healthy individuals. Alpha diversity measures indicated lower microbial diversity and evenness, while beta diversity analyses demonstrated distinct microbial community compositions. Core microbiome analysis identified unique taxa in COVID-19 patients that may contribute to disease pathology, while differential abundance analysis highlighted specific taxa shifts, including an increase in potential pathogens. Our findings advance the understanding of microbial changes in the oral microbiome associated with COVID-19 and suggest potential targets for microbiome-based interventions. While these results indicate associations with possible health impacts, further research is needed to determine causative links and long-term implications for COVID-19 survivors. This foundational research highlights the potential for microbiome science to inform diagnostic tools, such as microbial markers for disease progression, and therapeutic approaches, including targeted probiotics, which could ultimately support better patient outcomes and public health strategies.}, }
@article {pmid40132505, year = {2025}, author = {Wang, L and Zhang, W and Yao, J and Qi, Z and Liu, Y and Li, Z and Qu, J and Ma, Y and Zhang, Y}, title = {Effect of freeze-thaw cycle aging on biochar application in DEHP contaminated Mollisols: Insights from soil properties and microbial community.}, journal = {Ecotoxicology and environmental safety}, volume = {294}, number = {}, pages = {118082}, doi = {10.1016/j.ecoenv.2025.118082}, pmid = {40132505}, issn = {1090-2414}, mesh = {*Charcoal/chemistry ; *Soil Microbiology ; *Soil Pollutants/analysis/metabolism ; *Diethylhexyl Phthalate/metabolism/analysis ; Soil/chemistry ; Biodegradation, Environmental ; Freezing ; China ; Microbiota ; *Environmental Restoration and Remediation/methods ; }, abstract = {Biochar holds significant promise for remediation of organic pollutants. However, the impact of biochar on di-(2-ethylhexyl) phthalate (DEHP)-contaminated Mollisols after freeze-thaw cycles is largely unknown, according to the seasonal traits observed at high latitudes. In this study, fresh biochar (BC) was produced from corn straw, and freeze-thaw aging biochar (FBC) was prepared by simulating winter temperatures in the Mollisol region of Northeast China using BC as a precursor. Pot experiments were conducted to evaluate the effects of freeze-thaw aging on the detoxification efficiency of biochar, the improvement of soil physical and chemical properties, and the regulation of soil microbial community structure and functional genes. The results indicated that biochar after freeze-thaw cycling significantly improved the physical and chemical properties of Mollisols compared with the control, reducing DEHP content by 99.08 % after 28 days. Metagenomic sequencing further revealed the presence of microorganisms and genetic elements potentially involved in DEHP degradation in the soil. The treatment group with freeze-thaw aging biochar exhibited higher microbial diversity and abundance, particularly in Proteobacteria, Bacteroides, and Firmicutes. Analysis of the DEHP degradation pathway via benzoic acid route revealed an increase in the abundance of degraded functional genes/enzymes (benC-xylZ, pacL, catB, pcaG, mhpE, and mhpF). The up-regulation of nitrogen fixation genes and nitrification genes (amoB, hao, narG, nifD, and vnfH) along with a 49.19 % increase in soil microbial biomass nitrogen suggested that freeze-thaw aging biochar benefited nitrogen cycling. Furthermore, the feasibility of applying biochar to high-latitude agricultural settings was validated using pakchoi (Brassica rapa L. ssp. chinensis) as a test crop. These findings suggest that the freeze-thaw aging process enhances the effectiveness of biochar in remediating DEHP-contaminated Mollisols. This study offers a novel perspective on the restoration and improvement of Mollisol productivity in high-latitude regions through biochar application.}, }
@article {pmid40132013, year = {2025}, author = {Halo, BA and Aljabri, YAS and Yaish, MW}, title = {Drought-induced microbial dynamics in cowpea rhizosphere: Exploring bacterial diversity and bioinoculant prospects.}, journal = {PloS one}, volume = {20}, number = {3}, pages = {e0320197}, pmid = {40132013}, issn = {1932-6203}, mesh = {*Rhizosphere ; *Droughts ; *Vigna/microbiology ; *Bacteria/genetics/classification ; RNA, Ribosomal, 16S/genetics ; Biodiversity ; Soil Microbiology ; Phylogeny ; Plant Roots/microbiology ; Microbiota ; Metagenomics ; }, abstract = {Rhizospheric bacterial communities in plants contribute to drought resilience by promoting plant-soil interactions, yet their biodiversity and ecological impacts are not fully characterized. In cowpeas, these interactions may be crucial in enhancing tolerance to drought conditions. In this study, cowpea plants were subjected to drought treatment, the soil attached to the roots was collected, environmental DNA (e-DNA) was extracted, and the bacterial communities were identified as amplicon sequence variants (ASVs) by metagenomics analysis of the 16S rRNA gene. Microbial communities under drought and control conditions were analyzed using taxonomy and diversity metrics. The sequencing results revealed 5,571 ASVs, and taxonomic analysis identified 1,752 bacterial species. Alpha and beta diversity analyses showed less conserved microbial community structures and compositions among the samples isolated from the rhizosphere under drought conditions compared to untreated samples, implying the enhancement effect of drought on species' biodiversity and richness. The differential accumulation analysis of the bacterial community identified 75 species that accumulated significantly (P ≤ 0.05) in response to drought, including 13 species exclusively present, seven absent, and 46 forming a high-abundance cluster within the hierarchical heatmap. These species were also grouped into specific clades in the phylogenetic tree, suggesting common genetic ancestry and potentially shared traits associated with drought tolerance. The differentially accumulated bacterial list included previously characterized species from drought and saline habitats. These findings suggest that drought stress significantly alters the composition and abundance of epiphytic bacterial communities, potentially impacting the rhizosphere's ecological balance and interactions with cowpeas. The results highlight microbial adaptations that enhance plant resilience through improved stress mitigation, providing meaningful understandings for advancing sustainable agriculture and developing microbial-based strategies to boost crop productivity in drought-prone regions.}, }
@article {pmid40131463, year = {2025}, author = {Liu, H and Gan, Y and He, B and Liu, H and Zhuo, H and Tang, J and Xie, B and Shen, G and Ren, H and Jiang, X}, title = {mNGS technique was used to analyze the microbiome structure of intervertebral disc tissue in 99 patients with degenerative disc disease.}, journal = {European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society}, volume = {34}, number = {5}, pages = {1709-1721}, pmid = {40131463}, issn = {1432-0932}, mesh = {Humans ; *Intervertebral Disc Degeneration/microbiology ; Male ; Female ; Middle Aged ; *Intervertebral Disc/microbiology ; *Microbiota ; Adult ; *Lumbar Vertebrae/microbiology ; Aged ; }, abstract = {OBJECTIVE: Whether bacterial hypotoxic infection in the intervertebral disc is the cause of disc degenerative disease (DDD) is controversial. The mNGS technique can provide valuable insights by obtaining more comprehensive evidence of the presence of bacteria in the intervertebral disc. This study was designed to analyze the characteristics of intervertebral microbiome structure in patients with lumbar disc degenerative disease and its correlation with clinical indicators.<br><br>METHODS: A total of 104 patients with lumbar&#xa0;disc degenerative diseases were included in this study. The surgically removed lumbar intervertebral disc tissues were collected for clinical culture and metagenomic second-generation sequencing (mNGS), and the consistency of the two microbial detection methods was compared.According to the collected clinical information, patients were grouped according to the modified Pfirrmann grading, Modic typing and age, and the differences of microbial communities detected by mNGS among different groups were compared, including &#x3b1; diversity analysis, &#x3b2; diversity analysis, species abundance difference analysis, etc. Spearman correlation between clinical features and generic relative abundance was calculated.<br><br>RESULTS: The effective culture results of 104 intervertebral disc tissue samples were only 19 cases positive, with a positive rate of 18.3% (19/104), and the mNGS detection results were positive in 99 cases, with a positive rate of 95.2% (99/104). According to the 19 samples with positive culture, nearly half 47.4% (9/19) of staphylococcus species were positive, and all the positive species were basically epidermal common colonization species or environmental common bacteria. At the same time, we conducted two times of mNGS sequencing for these 19 samples, and the consistency rate between the two sequencing results and the culture results was 84.2% (16/19). According to the results of mNGS detection, 250 species from 110 genera were detected in 99 positive samples. The results of group analysis showed that patients with lower degree of disc degeneration (modified Pfirrmann&#x2009;&#x2264;&#x2009;4) and young patients (age&#x2009;<&#x2009;45&#xa0;years) had more abundant microbial communities in disc tissue (P&#x2009;<&#x2009;0.05).&#xa0;Correlation analysis showed that there was a positive correlation between Arcobacter skirrowii and improved Pfirrmann classification at the species level (P&#x2009;<&#x2009;0.01). There was a negative correlation between pseudomonas&#xa0;thermotolerans and modified Pfirrmann classification (P&#x2009;<&#x2009;0.05). There was a positive correlation between Staphylococcus hominis and Modic typing scores (P&#x2009;<&#x2009;0.05). Staphylococcus&#xa0;arlettae was negatively correlated with age (P&#x2009;<&#x2009;0.05). At the genus level, Arcobacter had a significant positive correlation with the modified Pfirrmann grade and Modic classification (P&#x2009;<&#x2009;0.05), Corynebacterium had a significant negative correlation with the modified Pfirrmann grade (P&#x2009;<&#x2009;0.05), and Pseudomonas had a significant negative correlation with age (P&#x2009;<&#x2009;0.05). After our follow-up of six months to one year, two of the patients included in this study eventually developed severe lumbar disc infection, and the rest did not develop infection.<br><br>CONCLUSIONS: This study proves that hypotoxic infection may be involved in the degeneration of intervertebral disc, and the bacterial species that cause this occult infection may be more abundant than previously thought. In addition, there was a significant correlation between the biome structure of these bacteria and clinical indicators. The hypothesis of the cause of this insidious infection has the potential to change the way the disease is treated.}, }
@article {pmid40131312, year = {2025}, author = {Herazo-Álvarez, J and Mora, M and Cuadros-Orellana, S and Vilches-Ponce, K and Hernández-García, R}, title = {A review of neural networks for metagenomic binning.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {2}, pages = {}, pmid = {40131312}, issn = {1477-4054}, support = {2022-21221825//National Agency for Research and Development/ ; EQM210185//Fondequip/ ; }, mesh = {*Metagenomics/methods ; *Neural Networks, Computer ; *Metagenome ; Humans ; Microbiota ; Machine Learning ; Deep Learning ; }, abstract = {One of the main goals of metagenomic studies is to describe the taxonomic diversity of microbial communities. A crucial step in metagenomic analysis is metagenomic binning, which involves the (supervised) classification or (unsupervised) clustering of metagenomic sequences. Various machine learning models have been applied to address this task. In this review, the contributions of artificial neural networks (ANN) in the context of metagenomic binning are detailed, addressing both supervised, unsupervised, and semi-supervised approaches. 34 ANN-based binning tools are systematically compared, detailing their architectures, input features, datasets, advantages, disadvantages, and other relevant aspects. The findings reveal that deep learning approaches, such as convolutional neural networks and autoencoders, achieve higher accuracy and scalability than traditional methods. Gaps in benchmarking practices are highlighted, and future directions are proposed, including standardized datasets and optimization of architectures, for third-generation sequencing. This review provides support to researchers in identifying trends and selecting suitable tools for the metagenomic binning problem.}, }
@article {pmid40129931, year = {2025}, author = {Lee, G and Rosa, BA and Fernandez-Baca, MV and Martin, J and Ore, RA and Ortiz, P and Cabada, MM and Mitreva, M}, title = {Distinct gut microbiome features characterize Fasciola hepatica infection and predict triclabendazole treatment outcomes in Peruvian patients.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1555171}, pmid = {40129931}, issn = {2235-2988}, mesh = {Peru ; *Gastrointestinal Microbiome/drug effects ; Humans ; *Triclabendazole/therapeutic use ; Animals ; *Fascioliasis/drug therapy/microbiology/parasitology ; *Fasciola hepatica/drug effects ; Male ; Female ; *Anthelmintics/therapeutic use ; Treatment Outcome ; Adult ; Metagenomics ; Middle Aged ; Bacteria/classification/genetics/isolation &amp; purification ; Longitudinal Studies ; }, abstract = {BACKGROUND: Fasciola hepatica, a globally distributed helminth, causes fasciolosis, a disease with significant health and economic impacts. Variability in triclabendazole (TCBZ) efficacy and emerging resistance are remaining challenges. Evidence suggests that the gut microbiome influences host-helminth interactions and is associated with anthelmintic effects, but its association with human F. hepatica infection and TCBZ efficacy is not well understood.<br><br>METHODS: In this study, we investigated the relationship between Fasciola hepatica infection and the gut microbiome through metagenomic shotgun sequencing of 30 infected and 60 age- and sex-matched uninfected individuals from Peru. Additionally, we performed a longitudinal analysis to evaluate microbiome dynamics in relation to TCBZ treatment response.<br><br>RESULTS AND DISCUSSION: Infection was associated with specific microbial taxonomic and functional features, including higher abundance of Negativibacillus sp900547015, Blautia A sp000285855, and Prevotella sp002299635 species, and enrichment of microbial pathways linked to survival under stress and depletion of pathways for microbial growth. Unexpectedly, we identified that responders to TCBZ treatment (who cleared infection) harbored many microbiome features significantly different relative to non-responders, both before and after treatment. Specifically, the microbiomes of responders had a higher abundance Firmicutes A and Bacteroides species as well as phospholipid synthesis and glucuronidation pathways, while non-responders had higher abundance of Actinobacteria species including several from the Parolsenella and Bifidobacterium genera, and Bifidobacterium shunt and amino acid biosynthesis pathways.<br><br>CONCLUSIONS: Our findings underscore the impact of helminth infection on gut microbiome and suggest a potential role of gut microbiota in modulating TCBZ efficacy, offering novel insights into F. hepatica-microbiome interactions and paving the way for microbiome-informed treatment approaches.}, }
@article {pmid40129261, year = {2025}, author = {Boden, JS and Som, SM and Brazelton, WJ and Anderson, RE and Stüeken, EE}, title = {Evaluating Serpentinization as a Source of Phosphite to Microbial Communities in Hydrothermal Vents.}, journal = {Geobiology}, volume = {23}, number = {2}, pages = {e70016}, pmid = {40129261}, issn = {1472-4669}, support = {NE/V010824/1//Natural Environment Research Council/ ; 80NSSC19K1427//NASA Planetary Science Division ISFM Program/ ; OCE-1536405//National Science Foundation/ ; 80NSSC18K0829//NASA Astrobiology Program/ ; 80NSSC19K1427//NASA Astrobiology Program/ ; }, mesh = {*Hydrothermal Vents/microbiology/chemistry ; *Phosphites/metabolism ; *Microbiota ; *Bacteria/metabolism/genetics ; }, abstract = {Previous studies have documented the presence of phosphite, a reduced and highly soluble form of phosphorus, in serpentinites, which has led to the hypothesis that serpentinizing hydrothermal vents could have been an important source of bioavailable phosphorus for early microbial communities in the Archean. Here, we test this hypothesis by evaluating the genomic hallmarks of phosphorus usage in microbial communities living in modern hydrothermal vents with and without influence from serpentinization. These genomic analyses are combined with results from a geochemical model that calculates phosphorus speciation during serpentinization as a function of temperature, water:rock ratio, and lithology at thermodynamic equilibrium. We find little to no genomic evidence of phosphite use in serpentinizing environments at the Voltri Massif or the Von Damm hydrothermal field at the Mid Cayman Rise, but relatively more in the Lost City hydrothermal field, Coast Range Ophiolite Microbial Observatory, The Cedars, and chimney samples from Old City hydrothermal field and Prony Bay hydrothermal field, as well as in the non-serpentinizing hydrothermal vents at Axial Seamount. Geochemical modeling shows that phosphite production is favored at ca 275°C-325°C and low water:rock ratios, which may explain previous observations of phosphite in serpentinite rocks; however, most of the initial phosphate is trapped in apatite during serpentinization, suppressing the absolute phosphite yield. As a result, phosphite from serpentinizing vents could have supported microbial growth around olivine minerals in chimney walls and suspended aggregates, but it is unlikely to have fueled substantial primary productivity in diffusely venting fluids during life's origin and evolution in the Archean unless substrates equivalent to dunites (composed of > 90 wt% olivine) were more common.}, }
@article {pmid40128855, year = {2025}, author = {DeVeaux, AL and Hall-Moore, C and Shaikh, N and Wallace, M and Burnham, CD and Schnadower, D and Kuppermann, N and Mahajan, P and Ramilo, O and Tarr, PI and Dantas, G and Schwartz, DJ}, title = {Metagenomic signatures of extraintestinal bacterial infection in the febrile term infant gut microbiome.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {82}, pmid = {40128855}, issn = {2049-2618}, support = {T32GM139774/GM/NIGMS NIH HHS/United States ; 2021081/DDCF/Doris Duke Charitable Foundation/United States ; R01 AI155893/AI/NIAID NIH HHS/United States ; U03MC00007/HRSA/HRSA HHS/United States ; P30DK052574/DK/NIDDK NIH HHS/United States ; K08 AI159384/AI/NIAID NIH HHS/United States ; R01HD062477//Eunice Kennedy Shriver National Institute of Child Health and Human Development/ ; R01AI155893//National Institute of Allergy and Infectious Diseases/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Female ; Male ; Infant ; *Metagenomics/methods ; Infant, Newborn ; Feces/microbiology ; *Fever/microbiology ; Urinary Tract Infections/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Bacterial Infections/microbiology ; Case-Control Studies ; Metagenome ; Bacteremia/microbiology ; }, abstract = {BACKGROUND: Extraintestinal bacterial infections (EBIs), e.g., urinary tract infection, bacteremia, and meningitis, occur in approximately 10% of febrile infants younger than 60 days. Although many EBI-causing species commonly reside in the infant gut, proof that the digestive system is a pre-infection habitat remains unestablished.<br><br>RESULTS: We studied a cohort of febrile term infants&#x2009;<&#x2009;60&#xa0;days old who presented to one of thirteen US emergency departments in the Pediatric Emergency Care Applied Research Network from 2016 to 2019. Forty EBI cases and 74 febrile controls matched for age, sex, and race without documented EBIs were selected for analysis. Shotgun sequencing was performed of the gut microbiome and of strains cultured from the gut and extraintestinal site(s) of EBI cases, including blood, urine, and/or cerebrospinal fluid. Using a combination of EBI isolate genomics and fecal metagenomics, we detected an intestinal strain presumptively isogenic to the EBI pathogen (>&#x2009;99.999% average nucleotide identity) in 63% of infants with EBIs. Although there was no difference in gut microbiome diversity between cases and controls, we observed significantly increased Escherichia coli relative abundance in the gut microbiome of infants with EBIs caused by E. coli. Infants with E. coli infections who were colonized by the putatively isogenic pathogen strain had significantly higher E. coli phylogroup B2 abundance in their gut, and their microbiome was more likely to contain virulence factor loci associated with adherence, exotoxin production, and nutritional/metabolic function.<br><br>CONCLUSIONS: The intestine plausibly serves as a reservoir for EBI pathogens in a subset of febrile term infants, prompting consideration of new opportunities for surveillance and EBI prevention among colonized, pre-symptomatic infants. Video Abstract.}, }
@article {pmid40128848, year = {2025}, author = {Byrne, SR and DeMott, MS and Yuan, Y and Ghanegolmohammadi, F and Kaiser, S and Fox, JG and Alm, EJ and Dedon, PC}, title = {Temporal dynamics and metagenomics of phosphorothioate epigenomes in the human gut microbiome.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {81}, pmid = {40128848}, issn = {2049-2618}, support = {P30-ES002109//NIEHS Core Center Grant/ ; R01-OD028099-01//NIH Transformative Award/ ; T32-ES007020//NIEHS Training Grant in Environmental Toxicology/ ; T32 ES007020/ES/NIEHS NIH HHS/United States ; P30 ES002109/ES/NIEHS NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; Feces/microbiology ; Mice ; Animals ; *Bacteria/genetics/classification/isolation &amp; purification/metabolism ; *Epigenesis, Genetic ; *Epigenome ; *Phosphates/metabolism ; Metagenome ; Female ; Male ; Mass Spectrometry ; }, abstract = {BACKGROUND: Epigenetic regulation of gene expression and host defense is well established in microbial communities, with dozens of DNA modifications comprising the epigenomes of prokaryotes and bacteriophage. Phosphorothioation (PT) of DNA, in which a chemically reactive sulfur atom replaces a non-bridging oxygen in the sugar-phosphate backbone, is catalyzed by dnd and ssp gene families widespread in bacteria and archaea. However, little is known about the role of PTs or other microbial epigenetic modifications in the human microbiome. Here we optimized and applied fecal DNA extraction, mass spectrometric, and metagenomics technologies to characterize the landscape and temporal dynamics of gut microbes possessing PT modifications.<br><br>RESULTS: Exploiting the nuclease-resistance of PTs, mass spectrometric analysis of limit digests of PT-containing DNA reveals PT dinucleotides as part of genomic consensus sequences, with 16 possible dinucleotide combinations. Analysis of mouse fecal DNA revealed a highly uniform spectrum of 11 PT dinucleotides in all littermates, with PTs estimated to occur in 5-10% of gut microbes. Though at similar levels, PT dinucleotides in fecal DNA from 11 healthy humans possessed signature combinations and levels of individual PTs. Comparison with a widely distributed microbial epigenetic mark, m[6]dA, suggested temporal dynamics consistent with expectations for gut microbial communities based on Taylor's Power Law. Application of PT-seq for site-specific metagenomic analysis of PT-containing bacteria in one fecal donor revealed the larger consensus sequences for the PT dinucleotides in Bacteroidota, Bacillota (formerly Firmicutes), Actinomycetota (formerly Actinobacteria), and Pseudomonadota (formerly Proteobacteria), which differed from unbiased metagenomics and suggested that the abundance of PT-containing bacteria did not simply mirror the spectrum of gut bacteria. PT-seq further revealed low abundance PT sites not detected as dinucleotides by mass spectrometry, attesting to the complementarity of the technologies. Video Abstract CONCLUSIONS: The results of our studies provide a benchmark for understanding the behavior of an abundant and chemically reactive epigenetic mark in the human gut microbiome, with implications for inflammatory conditions of the gut.}, }
@article {pmid40128575, year = {2025}, author = {Yun, H and Seo, JH and Kim, YG and Yang, J}, title = {Impact of scented candle use on indoor air quality and airborne microbiome.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {10181}, pmid = {40128575}, issn = {2045-2322}, support = {RS-2023-00244833//National Research Foundation of Korea/ ; }, mesh = {*Air Pollution, Indoor/analysis ; *Air Microbiology ; *Microbiota ; Particulate Matter/analysis ; Humans ; Environmental Monitoring ; Bacteria/genetics/classification/isolation &amp; purification ; Air Pollutants/analysis ; *Odorants/analysis ; }, abstract = {Indoor air quality has become a growing concern worldwide due to its significant impact on human health, particularly in residential environments where people spend most of their time. Many studies have examined particulate matter (PM) in indoor air and indoor bioaerosols. However, there is a significant lack of research on airborne micro-sized bacteria (m-AB) and nano-sized bacterial extracellular vesicles (n-ABE), particularly those produced by common household activities, such as burning scented candles. This study investigates changes in PM concentrations and indoor microbiome composition resulting from candle use. Air samples were collected from three locations in residential homes: at the candle-lit spot (CL), 3 m away (3m_CL), and 6 m away (6m_CL). PM10 concentrations peaked at 1.52 times the baseline at the source after 5 min of burning, while PM2.5 and PM1 remained elevated at 3m_CL and 6m_CL over time. Before burning, dominant m-AB genera included Phyllobacterium and Pseudomonas, while post-burning, Phyllobacterium myrsinacearum in n-ABE significantly increased, marking its first detection in indoor air. This suggests that existing airborne bacteria may undergo growth or apoptosis due to combustion byproducts. These findings highlight the importance of improving ventilation in indoor spaces to minimize health risks from prolonged exposure to airborne particles and bacterial vesicles.}, }
@article {pmid40128181, year = {2025}, author = {Yan, W and Shi, X and Zhao, Y and Liu, X and Jia, X and Gao, L and Yuan, J and Liao, A and Yasui, H and Wang, X and Wang, X and Zhang, R and Wang, H}, title = {Microbiota-reprogrammed phosphatidylcholine inactivates cytotoxic CD8 T cells through UFMylation via exosomal SerpinB9 in multiple myeloma.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {2863}, pmid = {40128181}, issn = {2041-1723}, support = {2022-YGJC-61;2022-MS-219//Natural Science Foundation of Liaoning Province (Liaoning Provincial Natural Science Foundation)/ ; }, mesh = {Female ; Animals ; Mice ; Humans ; Cell Line ; *T-Lymphocytes, Cytotoxic/immunology ; *Gastrointestinal Microbiome ; *Phosphatidylcholines/immunology/metabolism ; *Multiple Myeloma/genetics/immunology/metabolism/pathology ; RNA, Ribosomal, 16S/genetics ; Metagenomics ; *Exosomes/immunology/metabolism ; *Serpins/genetics/immunology/metabolism ; *Membrane Proteins/genetics/immunology/metabolism ; }, abstract = {Gut microbiome influences tumorigenesis and tumor progression through regulating the tumor microenvironment (TME) and modifying blood metabolites. However, the mechanisms by which gut microbiome and blood metabolites regulate the TME in multiple myeloma (MM) remain unclear. By employing16S rRNA gene sequencing coupled with metagenomics and ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry, we find that Lachnospiraceae are high and phosphatidylcholine (PC) are low in MM patients. We further show that Lachnospiraceae inhibits PC production from MM cells and enhances cytotoxic CD8 T cell function. Mechanistically, PC promotes Sb9 mRNA maturation in MM cells by LIN28A/B via lysophosphatidic acid, thus enhances exosamal Sb9 production. Exosamal Sb9 then reduces GZMB expression by suppressing tumor protein p53 (TP53) UFMylation via the competitive binding of TP53 with the ubiquitin-fold modifier conjugating enzyme 1 in CD8 T cells. We thus show that Lachnospiraceae and PC may be potential therapeutic targets for MM treatment.}, }
@article {pmid40127751, year = {2025}, author = {Lim, TW and Huang, S and Burrow, MF and McGrath, C}, title = {A randomised crossover clinical trial of the efficacy of an ultrasonic cleaner combined with a denture cleanser on the microbiome on removable dentures among community-dwelling older adults.}, journal = {Journal of dentistry}, volume = {156}, number = {}, pages = {105709}, doi = {10.1016/j.jdent.2025.105709}, pmid = {40127751}, issn = {1879-176X}, mesh = {Humans ; Cross-Over Studies ; *Denture Cleansers/therapeutic use/pharmacology ; Aged ; Female ; Male ; Single-Blind Method ; *Microbiota/drug effects ; Prospective Studies ; Biofilms/drug effects ; Aged, 80 and over ; *Denture, Partial, Removable/microbiology ; Independent Living ; Ultrasonics ; Toothbrushing ; }, abstract = {OBJECTIVE: To evaluate and characterise the microbial compositional changes of removable dentures after interventions by comparing the efficacy of the test arm (a portable self-operated ultrasonic cleaner combined with an enzymatic peroxide-based denture cleanser solution) to the control arm (immersion of the denture in the same cleanser solution followed by conventional brushing).<br><br>MATERIALS AND METHODS: A prospective, single-blind, block-randomised, two-period crossover, controlled clinical trial was conducted, involving 56 community-dwelling older adults wearing removable acrylic dentures. They were block-randomized into the test/control or control/test denture cleaning sequence. Type IIB Restriction-site Associated DNA for Microbiome metagenomic sequencing was adopted to characterize the species-resolved microbial composition for denture biofilm.<br><br>RESULTS: For the intervention effect, the overall microbial richness in both arms was not significantly different based on the Chao 1 index (P = 0.343). However, Beta diversity analysis (Jaccard qualitative distance matrix) demonstrated significant differences in the microbial community structures between the Test and Control arms after interventions, confirmed by the Permanova test (R[2] = 0.01118, P = 0.034). Among the opportunistic pathogenic bacteria, Pseudomonas aeruginosa was detected as one of the top 30 species by relative abundance at the end of the clinical trial, and Enterobacter kobei was significantly enriched in the control arm, as determined by LEfSe analysis.<br><br>CONCLUSIONS: The microbial community of denture biofilm samples after both interventions were significantly 'shifted' and had limited numbers of opportunistic pathogens, suggesting the interventions equally effective in mitigating the overall number of pathogenic bacteria.<br><br>CLINICAL SIGNIFICANCE: Denture cleaning intervention using ultrasonic cleaner combined with immersion in denture cleanser solution appears to be effective in shifting the denture microbiome with reduced pathogenic bacteria among community-dwelling denture wearers.}, }
@article {pmid40126388, year = {2025}, author = {Zhang, Q and Su, T and Pan, Y and Wang, X and Zhang, C and Qin, H and Li, M and Li, Q and Li, X and Guo, J and Wu, L and Qin, L and Liu, T}, title = {Malus hupehensis leaves: a functional beverage for alleviating hepatic inflammation and modulating gut microbiota in diabetic mice.}, journal = {Food &amp; function}, volume = {16}, number = {8}, pages = {2972-2990}, doi = {10.1039/d4fo05325g}, pmid = {40126388}, issn = {2042-650X}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Mice ; Plant Leaves/chemistry ; *Plant Extracts/pharmacology/administration &amp; dosage ; *Diabetes Mellitus, Type 2/drug therapy ; Male ; *Malus/chemistry ; Liver/drug effects/immunology/metabolism ; Mice, Inbred C57BL ; Beverages/analysis ; Functional Food ; Inflammation ; }, abstract = {Malus hupehensis leaves (MHL), consumed as a daily beverage in Chinese folk tradition and recently recognized as a new food material, are abundant in polyphenols and bioactive compounds that demonstrate hypoglycemic, lipid-lowering, and anti-inflammatory effects. However, the antidiabetic mechanisms have not been fully elucidated. This study aimed to investigate the protective mechanisms of Malus hupehensis leaves' extract (MHLE) against type 2 diabetes mellitus (T2DM). The results showed that MHLE effectively ameliorated glucose and lipid metabolic abnormalities in db/db mice, and attenuated hepatic macrophage activation. Transcriptomic analysis of the liver revealed that MHLE primarily affects genes involved in inflammatory responses and inhibited the TLR4/MAPK pathway to reduce hepatic inflammation. Metagenomic sequencing identified changes in gut microbiota composition and showed that MHLE restored the abundance of Lachnospiraceae bacterium, Oscillospiraceae bacterium, and Clostridia bacterium while reducing the abundance of Escherichia coli, thereby ameliorating gut dysbiosis. The integrated regulation of metabolism, immune response, and the microbial environment by MHLE significantly alleviated symptoms of T2DM. This study offers strong scientific evidence for the potential use of MHL as a functional food.}, }
@article {pmid40124740, year = {2025}, author = {Brucato, N and Lisant, V and Kinipi, C and Kik, A and Besnard, G and Leavesley, M and Ricaut, FX}, title = {Influence of betel nut chewing on oral microbiome in Papua New Guinea.}, journal = {Evolution, medicine, and public health}, volume = {13}, number = {1}, pages = {36-44}, pmid = {40124740}, issn = {2050-6201}, abstract = {BACKGROUND AND OBJECTIVES: For thousands of years, betel nut has been used as a psychoactive agent in Asian and Oceanian populations. Betel nut chewing was associated with the alteration of human oral microbiome and with diseases such as oral cancer and periodontitis, but only in populations of Asian cultural background. We studied the influence of betel nut chewing on the oral microbiome in Papua New Guinea, where half of the population uses betel nut and the prevalence of these diseases is one of the highest in the world.<br><br>METHODOLOGY: We characterized the oral microbiomes of 100 Papua New Guineans. We defined two cohorts of betel chewers (n&#x2005;=&#x2005;50) and non-chewers (n&#x2005;=&#x2005;50) based on a genetic approach to identify the presence of betel nut in saliva. We statistically compared the alpha and beta microbial diversities between the two cohorts. We performed linear discriminant analyses to identify bacterial species more prevalent in each cohort.<br><br>RESULTS: We found that oral microbial diversity is significantly different between betel chewers and non-chewers. The dysbiosis observed in betel chewers, led to an increase of pathogenic bacterial species including Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia, known to be in the aetiology of periodontal diseases.<br><br>CONCLUSIONS AND IMPLICATIONS: Our study strongly supports the alteration of human oral microbiome by betel nut use, potentially leading to periodontal diseases. It also shows the need to consider local specificities (e.g. different habits, betel nut types, and oral microbial diversities) to better characterize the impact of betel nut chewing on health.}, }
@article {pmid40122890, year = {2025}, author = {Nori, SRC and Walsh, CJ and McAuliffe, FM and Moore, RL and Van Sinderen, D and Feehily, C and Cotter, PD}, title = {Strain-level variation among vaginal Lactobacillus crispatus and Lactobacillus iners as identified by comparative metagenomics.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {49}, pmid = {40122890}, issn = {2055-5008}, support = {H2020-MSCA-COFUND-2019-945385//EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 Marie Sk&#x142;odowska-Curie Actions (H2020 Excellent Science - Marie Sk&#x142;odowska-Curie Actions)/ ; 18/CRT/6214//Science Foundation Ireland (SFI)/ ; }, mesh = {Female ; Humans ; *Vagina/microbiology ; *Lactobacillus/genetics/classification/isolation &amp; purification ; *Metagenomics/methods ; *Lactobacillus crispatus/genetics/classification/isolation &amp; purification ; Pregnancy ; Microbiota ; Metagenome ; Ireland ; Genome, Bacterial ; Genetic Variation ; Phylogeny ; }, abstract = {The vaginal microbiome, a relatively simple, low diversity ecosystem crucial for female health, is often dominated by Lactobacillus spp. Detailed strain-level data, facilitated by shotgun sequencing, can provide a greater understanding of the mechanisms of colonization and host-microbe interactions. We analysed 354 vaginal metagenomes from pregnant women in Ireland to investigate metagenomic community state types and strain-level variation, focusing on cell surface interfaces. Our analysis revealed multiple subspecies, with Lactobacillus crispatus and Lactobacillus iners being the most dominant. We found genes, including putative mucin-binding genes, distinct to L. crispatus subspecies. Using 337 metagenome-assembled genomes, we observed a higher number of strain-specific genes in L. crispatus related to cell wall biogenesis, carbohydrate and amino acid metabolism, many under positive selection. A cell surface glycan gene cluster was predominantly found in L. crispatus but absent in L. iners and Gardnerella vaginalis. These findings highlight strain-specific factors associated with colonisation and host-microbe interactions.}, }
@article {pmid40122128, year = {2025}, author = {Zhang, D and Wang, Q and Li, D and Chen, S and Chen, J and Zhu, X and Bai, F}, title = {Gut microbiome composition and metabolic activity in metabolic-associated fatty liver disease.}, journal = {Virulence}, volume = {16}, number = {1}, pages = {2482158}, pmid = {40122128}, issn = {2150-5608}, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; Middle Aged ; China ; Adult ; *Fatty Liver/microbiology/metabolism ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Case-Control Studies ; Metagenomics ; Aged ; Metabolome ; Metabolomics ; Metagenome ; }, abstract = {Metabolic Associated Fatty Liver Disease (MAFLD) impacts approximately 25% of the global population. Between April 2023 and July 2023, 60 patients with MAFLD, along with 60 age, ethnicity, and sex-matched healthy controls (HCs), were enrolled from the Inner Mongolia Autonomous Region, China. Analysis of gut microbiota composition and plasma metabolic profiles was conducted using metagenome sequencing and LC-MS. LEfSe analysis identified five pivotal species: Eubacterium rectale, Dialister invisus, Pseudoruminococcus massiliensis, GGB3278 SGB4328, and Ruminococcaceae bacteria. In subgroup analysis, Eubacterium rectale tended to increase by more than 2 times and more than double in the non-obese MAFLD group, and MAFLD with moderate hepatic steatosis (HS), respectively. Plasma samples identified 172 metabolites mainly composed of fatty acid metabolites such as propionic acid and butyric acid analogues. Ruminococcaceae bacteria have a strong positive correlation with β-alanine, uric acid, and L-valine. Pseudoruminococcus massiliensis has a strong positive correlation with β-alanine. Combinations of phenomics and metabolomics yielded the highest accuracy (AUC = 0.97) in the MAFLD diagnosis. Combinations of phenomics and metagenomics yielded the highest accuracy (AUC = 0.94) in the prediction of the MAFLD HS progress. Increases in Eubacterium rectale and decreases in Dialister invisus seem to be indicative of MAFLD patients. Eubacterium rectale may predict HS degree of MAFLD and play an important role in the development of non-obese MAFLD. Eubacterium rectale can generate more propionic acid and butyric acid analogues to absorb energy and increase lipid synthesis and ultimately cause MAFLD.}, }
@article {pmid40121033, year = {2025}, author = {Wong, MK and Boukhaled, GM and Armstrong, E and Liu, R and Heirali, AA and Yee, NR and Tsang, J and Spiliopoulou, P and Schneeberger, PHH and Wang, BX and Cochrane, K and Sherriff, K and Allen-Vercoe, E and Siu, LL and Spreafico, A and Coburn, B}, title = {Microbial Ecosystem Therapeutics 4 (MET4) elicits treatment-specific IgG responses associated with changes in gut microbiota in immune checkpoint inhibitor recipients with advanced solid tumors.}, journal = {Journal for immunotherapy of cancer}, volume = {13}, number = {3}, pages = {}, pmid = {40121033}, issn = {2051-1426}, mesh = {Humans ; *Gastrointestinal Microbiome/immunology/drug effects ; *Immune Checkpoint Inhibitors/therapeutic use/pharmacology ; *Immunoglobulin G/immunology ; *Neoplasms/drug therapy/immunology ; Female ; Male ; Middle Aged ; }, abstract = {BACKGROUND: Gut microbiome modulation has shown promise in its potential to treat cancer in combination with immunotherapy. Mechanistically, the pathways and routes by which gut microbiota may influence systemic and antitumor immunity remain uncertain. Here, we used blood and stool samples from Microbial Ecosystem Therapeutic 4 (MET4)-IO, an early-phase trial testing the safety and engraftment of the MET4 bacterial consortium in immune checkpoint inhibitor recipients, to assess how MET4 may affect systemic immunity.<br><br>METHODS: Circulating antibody responses induced by MET4 were assessed using an antimicrobial antibody flow cytometry assay on pretreatment and post-treatment plasma. Antibody responses were associated with taxonomic changes in stool identified by metagenomic sequencing. Mass cytometry was performed on peripheral blood mononuclear cells to identify shifts in circulating immune subsets associated with antibody responses.<br><br>RESULTS: Increases in circulating anti-MET4 immunoglobulin G (IgG) responses were measured by flow cytometry post-consortium treatment in MET4 recipients, but not untreated control participants, with five individuals displaying notably higher antibody responses. Stronger IgG responses were associated with greater increases in multiple taxa, including MET4 microbe Collinsella aerofaciens, which was previously linked with immune checkpoint response. However, these taxa were not enriched in the IgG-bound fraction post-MET4 treatment. Greater increases in circulating B cells and FoxP3[+] CD4[+] T cells post-MET4 treatment were observed in the blood of high IgG responders, while CD14[+] and CD16[+] monocyte populations were decreased in these individuals.<br><br>CONCLUSION: These results demonstrate the induction of treatment-specific circulating humoral immunity by a bacterial consortium and suggest potential mechanisms by which gut microbes may contribute to antitumor immunity.}, }
@article {pmid40118219, year = {2025}, author = {Yan, R and Zhang, L and Chen, Y and Zheng, Y and Xu, P and Xu, Z}, title = {Therapeutic potential of gut microbiota modulation in epilepsy: A focus on short-chain fatty acids.}, journal = {Neurobiology of disease}, volume = {209}, number = {}, pages = {106880}, doi = {10.1016/j.nbd.2025.106880}, pmid = {40118219}, issn = {1095-953X}, mesh = {*Gastrointestinal Microbiome/physiology ; Humans ; *Fatty Acids, Volatile/metabolism ; *Epilepsy/metabolism/microbiology/therapy ; Blood-Brain Barrier/metabolism ; Animals ; Dysbiosis/metabolism ; }, abstract = {According to the criteria established by the International League Against Epilepsy (ILAE), epilepsy is defined as a disorder characterized by at least two unprovoked seizures occurring more than 24 h apart. Its pathogenesis is closely related to various physiological and pathological factors. Advances in high-throughput metagenomic sequencing have increasingly highlighted the role of gut microbiota dysbiosis in epilepsy. Short-chain fatty acids (SCFAs), the major metabolites of the gut microbiota and key regulators of the gut-brain axis, support physiological homeostasis through multiple mechanisms. Recent studies have indicated that SCFAs not only regulate seizures by maintaining intestinal barrier integrity and modulating intestinal immune responses, but also affect the structure and function of the blood-brain barrier (BBB) and regulate neuroinflammation. This review, based on current literatures, explores the relationship between SCFAs and epilepsy, emphasizing how SCFAs affect epilepsy by modulating the intestinal barrier and BBB. In-depth studies on SCFAs may reveal their therapeutic potential and inform the development of gut microbiota-targeted epilepsy treatments.}, }
@article {pmid40117915, year = {2025}, author = {Ghemrawi, M and Ramírez Torres, A and Netherland, M and Wang, Y and Hasan, NA and El-Fahmawi, B and Duncan, G and McCord, B}, title = {Forensic insights from shotgun metagenomics: Tracing microbial exchange during sexual intercourse.}, journal = {Forensic science international. Genetics}, volume = {78}, number = {}, pages = {103266}, doi = {10.1016/j.fsigen.2025.103266}, pmid = {40117915}, issn = {1878-0326}, mesh = {Humans ; Female ; *Metagenomics ; Male ; *Microbiota ; *Coitus ; Vagina/microbiology ; Adult ; RNA, Ribosomal, 16S/genetics ; Penis/microbiology ; DNA, Bacterial/genetics ; Sequence Analysis, DNA ; Forensic Genetics ; Proof of Concept Study ; Bacteria/genetics ; }, abstract = {The microbiome is becoming an emerging field of interest within forensic science with high potential for individualization; however, little is known about bacterial species specific to the genital area or their ability to transfer between individuals during sexual contact. In this proof-of-concept study, we investigated microbial transfer dynamics in seven monogamous, heterosexual couples by collecting pre- and post-sexual intercourse samples from their genital areas, including penile, vaginal, and labial locations. Utilizing Shotgun Metagenomic Sequencing, we sequenced the microbial profiles of these samples. Our findings reveal significant transfer from the vaginal microbiome onto the penile microbiome, predominantly originating from the labial genitalia. Moreover, strain analysis unveiled distinct differentiation between the same species of bacteria across individuals, underscoring the potential for microbial forensics to distinguish individuals. This study contributes to our understanding of microbial transfer during sexual contact and highlights the forensic implications of the genital microbiome.}, }
@article {pmid40117176, year = {2025}, author = {Zielińska, K and Udekwu, KI and Rudnicki, W and Frolova, A and Łabaj, PP}, title = {Healthy microbiome-moving towards functional interpretation.}, journal = {GigaScience}, volume = {14}, number = {}, pages = {}, pmid = {40117176}, issn = {2047-217X}, support = {2020/38/E/NZ2/00598//NCN/ ; PLG/2023/016234//Jagiellonian University in Krakow/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Inflammatory Bowel Diseases/microbiology ; *Metagenomics/methods ; Dysbiosis/microbiology ; Phylogeny ; *Microbiota ; Principal Component Analysis ; Computational Biology/methods ; }, abstract = {BACKGROUND: Microbiome-based disease prediction has significant potential as an early, noninvasive marker of multiple health conditions linked to dysbiosis of the human gut microbiota, thanks in part to decreasing sequencing and analysis costs. Microbiome health indices and other computational tools currently proposed in the field often are based on a microbiome's species richness and are completely reliant on taxonomic classification. A resurgent interest in a metabolism-centric, ecological approach has led to an increased understanding of microbiome metabolic and phenotypic complexity, revealing substantial restrictions of taxonomy-reliant approaches.<br><br>FINDINGS: In this study, we introduce a new metagenomic health index developed as an answer to recent developments in microbiome definitions, in an effort to distinguish between healthy and unhealthy microbiomes, here in focus, inflammatory bowel disease (IBD). The novelty of our approach is a shift from a traditional Linnean phylogenetic classification toward a more holistic consideration of the metabolic functional potential underlining ecological interactions between species. Based on well-explored data cohorts, we compare our method and its performance with the most comprehensive indices to date, the taxonomy-based Gut Microbiome Health Index (GMHI), and the high-dimensional principal component analysis (hiPCA) methods, as well as to the standard taxon- and function-based Shannon entropy scoring. After demonstrating better performance on the initially targeted IBD cohorts, in comparison with other methods, we retrain our index on an additional 27 datasets obtained from different clinical conditions and validate our index's ability to distinguish between healthy and disease states using a variety of complementary benchmarking approaches. Finally, we demonstrate its superiority over the GMHI and the hiPCA on a longitudinal COVID-19 cohort and highlight the distinct robustness of our method to sequencing depth.<br><br>CONCLUSIONS: Overall, we emphasize the potential of this metagenomic approach and advocate a shift toward functional approaches to better understand and assess microbiome health as well as provide directions for future index enhancements. Our method, q2-predict-dysbiosis (Q2PD), is freely available (https://github.com/Kizielins/q2-predict-dysbiosis).}, }
@article {pmid40116459, year = {2025}, author = {Blakeley-Ruiz, JA and Bartlett, A and McMillan, AS and Awan, A and Walsh, MV and Meyerhoffer, AK and Vintila, S and Maier, JL and Richie, TG and Theriot, CM and Kleiner, M}, title = {Dietary protein source alters gut microbiota composition and function.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40116459}, issn = {1751-7370}, support = {R35 GM138362/GM/NIGMS NIH HHS/United States ; 7002782//USDA National Institute of Food and Agriculture/ ; P30 DK034987/DK/NIDDK NIH HHS/United States ; P30 DK034987/NH/NIH HHS/United States ; T32 DK007737/DK/NIDDK NIH HHS/United States ; 7002782//USDA National Institute of Food and Agriculture, Hatch/ ; }, mesh = {Animals ; *Dietary Proteins/metabolism/administration &amp; dosage ; Mice ; *Gastrointestinal Microbiome/drug effects ; Metagenomics ; *Bacteria/classification/genetics ; Mice, Inbred C57BL ; Proteomics ; Diet ; Male ; Amino Acids/metabolism ; }, abstract = {The source of protein in a person's diet affects their total life expectancy. However, the mechanisms by which dietary protein sources differentially impact human health and life expectancy are poorly understood. Dietary choices impact the composition and function of the intestinal microbiota that ultimately modulate host health. This raises the possibility that health outcomes based on dietary protein sources might be driven by interactions between dietary protein and the gut microbiota. In this study, we determined the effects of seven different sources of dietary protein on the gut microbiota of mice using an integrated metagenomics-metaproteomics approach. The protein abundances measured by metaproteomics can provide microbial species abundances, and evidence for the molecular phenotype of microbiota members because measured proteins indicate the metabolic and physiological processes used by a microbial community. We showed that dietary protein source significantly altered the species composition and overall function of the gut microbiota. Different dietary protein sources led to changes in the abundance of microbial proteins involved in the degradation of amino acids and the degradation of glycosylations conjugated to dietary protein. In particular, brown rice and egg white protein increased the abundance of amino acid degrading enzymes. Egg white protein increased the abundance of bacteria and proteins usually associated with the degradation of the intestinal mucus barrier. These results show that dietary protein sources can change the gut microbiota's metabolism, which could have major implications in the context of gut microbiota mediated diseases.}, }
@article {pmid40115125, year = {2025}, author = {Pavloudi, C and Santi, I and Azua, I and Baña, Z and Bastianini, M and Belser, C and Bilbao, J and Bitz-Thorsen, J and Broudin, C and Camusat, M and Cancio, I and Caray-Counil, L and Casotti, R and Castel, J and Comtet, T and Cox, CJ and Daguin, C and Díaz de Cerio, O and Exter, K and Fauvelot, C and Frada, MJ and Galand, PE and Garczarek, L and González Fernández, J and Guillou, L and Hablützel, PI and Heynderickx, H and Houbin, C and Kervella, AE and Krystallas, A and Lagaisse, R and Laroquette, A and Lescure, L and Lopes, E and Loulakaki, M and Louro, B and Magalhaes, C and Maidanou, M and Margiotta, F and Montresor, M and Not, F and Paredes, E and Percopo, I and Péru, E and Poulain, J and Præbel, K and Rigaut-Jalabert, F and Romac, S and Stavroulaki, M and Souza Troncoso, J and Thiébaut, E and Thomas, W and Tkacz, A and Trano, AC and Wincker, P and Pade, N}, title = {First release of the European marine omics biodiversity observation network (EMO BON) shotgun metagenomics data from water and sediment samples.}, journal = {Biodiversity data journal}, volume = {13}, number = {}, pages = {e143585}, pmid = {40115125}, issn = {1314-2828}, abstract = {The European Marine Omics Biodiversity Observation Network (EMO BON) is an initiative of the European Marine Biological Resource Centre (EMBRC) to establish a persistent genomic observatory amongst designated European coastal marine sites, sharing the same protocols for sampling and data curation. Environmental samples are collected from the water column and, at some sites, soft sediments and hard substrates (Autonomous Reef Monitoring Structures - ARMS), together with a set of mandatory and discretionary metadata (including Essential Ocean Variables - EOVs). Samples are collected following standardised protocols at regular and specified intervals and sequenced in large six-monthly batches at a centralised sequencing facility. The use of standard operating procedures (SOPs) during data collection, library preparation and sequencing aims to provide uniformity amongst the data collected from the sites. Coupled with strict adherence to open and FAIR (Findable, Accessible, Interoperable, Reusable) data principles, this ensures maximum comparability amongst samples and enhances reusability and interoperability of the data with other data sources. The observatory network was launched in June 2021, when the first sampling campaign took place.}, }
@article {pmid40115072, year = {2025}, author = {Li, J and Hu, X and Tao, X and Li, Y and Jiang, W and Zhao, M and Ma, Z and Chen, B and Sheng, S and Tong, J and Zhang, H and Shen, B and Gao, X}, title = {Deconstruct the link between gut microbiota and neurological diseases: application of Mendelian randomization analysis.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1433131}, pmid = {40115072}, issn = {2235-2988}, mesh = {Humans ; *Mendelian Randomization Analysis ; *Gastrointestinal Microbiome ; *Nervous System Diseases/microbiology/genetics ; Brain ; Genome-Wide Association Study ; Risk Factors ; }, abstract = {BACKGROUND: Recent research on the gut-brain axis has deepened our understanding of the correlation between gut bacteria and the neurological system. The inflammatory response triggered by gut microbiota may be associated with neurodegenerative diseases. Additionally, the impact of gut microbiota on emotional state, known as the "Gut-mood" relationship, could play a role in depression and anxiety disorders.<br><br>RESULTS: This review summarizes recent data on the role of gut-brain axis in the pathophysiology of neuropsychiatric and neurological disorders including epilepsy, schizophrenia, Alzheimer's disease, brain cancer, Parkinson's disease, bipolar disorder and stroke. Also, we conducted a Mendelian randomization study on seven neurological disorders (Epilepsy, schizophrenia, Alzheimer's disease, brain cancer, Parkinson's disease, bipolar disorder and stroke). MR-Egger and MR-PRESSO tests confirmed the robustness of analysis against horizontal pleiotropy.<br><br>CONCLUSIONS: By comparing the protective and risk factors for neurological disorders found in our research and other researches, we can furtherly determine valuable indicators for disease evolution tracking and potential treatment targets. Future research should explore extensive microbiome genome-wide association study datasets using metagenomics sequencing techniques to deepen our understanding of connections and causality between neurological disorders.}, }
@article {pmid40114290, year = {2025}, author = {Demina, T and Marttila, H and Pessi, IS and Männistö, MK and Dutilh, BE and Roux, S and Hultman, J}, title = {Tunturi virus isolates and metagenome-assembled viral genomes provide insights into the virome of Acidobacteriota in Arctic tundra soils.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {79}, pmid = {40114290}, issn = {2049-2618}, mesh = {*Soil Microbiology ; *Virome/genetics ; *Genome, Viral ; *Metagenome ; Phylogeny ; Tundra ; *Acidobacteria/virology ; Arctic Regions ; *Bacteriophages/genetics/isolation &amp; purification/classification ; Finland ; }, abstract = {BACKGROUND: Arctic soils are climate-critical areas, where microorganisms play crucial roles in nutrient cycling processes. Acidobacteriota are phylogenetically and physiologically diverse bacteria that are abundant and active in Arctic tundra soils. Still, surprisingly little is known about acidobacterial viruses in general and those residing in the Arctic in particular. Here, we applied both culture-dependent and -independent methods to study the virome of Acidobacteriota in Arctic soils.<br><br>RESULTS: Five virus isolates, Tunturi 1-5, were obtained from Arctic tundra soils, Kilpisj&#xe4;rvi, Finland (69&#xb0;N), using Tunturiibacter spp. strains originating from the same area as hosts. The new virus isolates have tailed particles with podo- (Tunturi 1, 2, 3), sipho- (Tunturi 4), or myovirus-like (Tunturi 5) morphologies. The dsDNA genomes of the viral isolates are 63-98&#xa0;kbp long, except Tunturi 5, which is a jumbo phage with a 309-kbp genome. Tunturi 1 and Tunturi 2 share 88% overall nucleotide identity, while the other three are not related to one another. For over half of the open reading frames in Tunturi genomes, no functions could be predicted. To further assess the Acidobacteriota-associated viral diversity in Kilpisj&#xe4;rvi soils, bulk metagenomes from the same soils were explored and a total of 1881 viral operational taxonomic units (vOTUs) were bioinformatically predicted. Almost all vOTUs (98%) were assigned to the class Caudoviricetes. For 125 vOTUs, including five (near-)complete ones, Acidobacteriota hosts were predicted. Acidobacteriota-linked vOTUs were abundant across sites, especially in fens. Terriglobia-associated proviruses were observed in Kilpisj&#xe4;rvi soils, being related to proviruses from distant soils and other biomes. Approximately genus- or higher-level similarities were found between the Tunturi viruses, Kilpisj&#xe4;rvi vOTUs, and other soil vOTUs, suggesting some shared groups of Acidobacteriota viruses across soils.<br><br>CONCLUSIONS: This study provides acidobacterial virus isolates as laboratory models for future research and adds insights into the diversity of viral communities associated with Acidobacteriota in tundra soils. Predicted virus-host links and viral gene functions suggest various interactions between viruses and their host microorganisms. Largely unknown sequences in the isolates and metagenome-assembled viral genomes highlight a need for more extensive sampling of Arctic soils to better understand viral functions and contributions to ecosystem-wide cycling processes in the Arctic. Video Abstract.}, }
@article {pmid40114168, year = {2025}, author = {Wu, Y and Qu, Z and Wu, Z and Zhuang, J and Wang, Y and Wang, Z and Chu, J and Qi, Q and Han, S}, title = {Multiple primary malignancies and gut microbiome.}, journal = {BMC cancer}, volume = {25}, number = {1}, pages = {516}, pmid = {40114168}, issn = {1471-2407}, support = {2022E50008, 2024ZY01056//Zhejiang Provincial Clinical Research Center for CANCER/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Female ; Male ; Middle Aged ; Aged ; Metagenomics/methods ; *Neoplasms, Multiple Primary/microbiology/virology ; *Colorectal Neoplasms/microbiology/virology ; Case-Control Studies ; Adult ; Bacteria/genetics/classification/isolation &amp; purification ; Enterovirus/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: Multiple primary malignancies (MPM) are two or more independent primary malignancies. Recently, the relationship between microbiome and various tumors has been gradually focused on.<br><br>OBJECTIVE: To describe the relationship between MPM patients (MPMs) and gut microbiome.<br><br>METHODS: A total of 27 MPMs, 30 colorectal cancer patients (CRCs), and 30 healthy individuals were included to obtain metagenomic sequencing data. The knowledge graphs of gut bacteria and enteroviruses were plotted based on metagenomics. Wilcoxon rank-sum test was used to screen the characteristic gut microbiome.<br><br>RESULTS: The knowledge graph of gut microbiome in MPM patients was plotted. A total of 26 different gut bacteria, including Dialister, Fecalibacterium and Mediterraneibacter, were found between MPMs and healthy individuals. Twenty gut bacteria, including Parvimonas, Dialister and Mediterraneibacter, were more abundant in MPM complicated by CRC compared with CRCs. Twenty-one different enterovirus, including Triavirus, Punavirus and Lilyvirus, were screened between MPMs and healthy individuals. Triavirus, Punavirus and Lilyvirus were less abundant in MPM than healthy individuals. The abundance of Triavirus, Punavirus and Lilyvirus in CRC patients were also lower than MPM complicated by CRC patients.<br><br>CONCLUSION: The knowledge graph of gut microbiome in MPM patients was plotted. It may provide basic data support for future research of MPM.}, }
@article {pmid40111684, year = {2025}, author = {de Barros Santos, HS and Pagnussatti, MEL and Arthur, RA}, title = {Symbiosis Between the Oral Microbiome and the Human Host: Microbial Homeostasis and Stability of the Host.}, journal = {Advances in experimental medicine and biology}, volume = {1472}, number = {}, pages = {31-51}, pmid = {40111684}, issn = {0065-2598}, mesh = {Humans ; *Symbiosis/physiology ; *Mouth/microbiology/virology ; *Microbiota/physiology ; *Homeostasis ; *Bacteria/genetics/metabolism ; *Host Microbial Interactions/physiology ; Archaea ; Fungi ; }, abstract = {The oral cavity presents a highly diverse microbial composition. All the three domains of life, Bacteria, Eukarya, and Archaea, as well as viruses constitute the oral microbiome. Bacteria are among the most abundant microorganisms in the oral cavity, followed by viruses, fungi, and Archaea. These microorganisms tend to live in harmony with each other and with the host by preventing the colonization of oral sites by exogenous microorganisms. Interactions between the host and its microbiota are crucial for keeping ecological stability in the oral cavity and a condition compatible with oral health. This chapter focuses on describing the oral microbiota in healthy individuals based on both targeted and nontargeted genome sequencing methods and the functional activity played by those microorganisms based on metagenomic, metatranscriptomic, metaproteomic, and metabolomic analyses. Additionally, this chapter explores mutualistic and antagonistic microbe-microbe relationships. These interactions are mediated by complex mechanisms like cross-feeding networks, production of bacteriocins and secondary metabolites, synthesis of pH-buffering compounds, and the use of universal signaling molecules. At last, the role played by host-microbe interactions on colonization resistance and immune tolerance will help provide a better understanding about the harmonious and peaceful coexistence among host and microbial cells under oral health-related conditions.}, }
@article {pmid40108202, year = {2025}, author = {Redgwell, TA and Thorsen, J and Petit, MA and Deng, L and Vestergaard, G and Russel, J and Chawes, B and Bønnelykke, K and Bisgaard, H and Nielsen, DS and Sørensen, S and Stokholm, J and Shah, SA}, title = {Prophages in the infant gut are pervasively induced and may modulate the functionality of their hosts.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {46}, pmid = {40108202}, issn = {2055-5008}, mesh = {Humans ; Infant ; *Prophages/genetics/isolation &amp; purification/physiology/classification ; *Gastrointestinal Microbiome ; Metagenome ; Virome ; Female ; Feces/microbiology/virology ; Male ; Metagenomics ; Bacteroides/virology ; }, abstract = {Gut microbiome (GM) composition and function is pivotal for human health and disease, of which the virome's importance is increasingly recognised. However, prophages and their induction patterns in the infant gut remain understudied. Here, we identified 10645 putative prophages in 662 metagenomes from 1-year-old children in the COPSAC2010 mother-child cohort and investigated their potential functions. No core provirome was found as the most prevalent vOTU was identified in only ~70% of the samples. The most dominant cluster of vOTUs in the cohort was related to Bacteroides phage Hanky p00', and it carried both diversity generating retroelements and genes involved in capsular polysaccharide synthesis. Paired analysis of viromes and metagenomes from the same samples revealed that most prophages within the infant gut were induced and that induction was unaffected by a range of environmental perturbers. In summary, prophages are major components of the infant gut that may have far reaching influences on the microbiome and its host.}, }
@article {pmid40105325, year = {2025}, author = {Zhang, H and Lu, T and Guo, S and He, T and Shin, M-K and Luo, C and Tong, J and Zhang, Y}, title = {Rumen microbes affect the somatic cell counts of dairy cows by modulating glutathione metabolism.}, journal = {mSystems}, volume = {10}, number = {4}, pages = {e0109324}, pmid = {40105325}, issn = {2379-5077}, support = {32272904//National Natural Science Foundation of China/ ; 32373086//National Natural Science Foundation of China/ ; }, mesh = {Animals ; Cattle ; *Rumen/microbiology/metabolism ; Female ; Milk/metabolism/cytology ; *Glutathione/metabolism ; Cell Count ; Cytokines/blood ; *Gastrointestinal Microbiome ; Microbiota ; Lactation ; Mastitis, Bovine/microbiology/metabolism ; Dysbiosis ; }, abstract = {Healthy mammary glands are essential for high-quality milk production in the dairy industry. The relationship between somatic cell counts (SCCs), rumen fermentation, and microbiota interactions remains unclear. This study integrated physiological indicators, high-throughput 16S rRNA gene sequencing, and metagenomics data analysis to investigate the mechanisms linking rumen microbes and mastitis and to evaluate the changes in milk production and serum cytokine levels in cows with low (L-SCC) and high (H-SCC) somatic cell counts. Compared with the L-SCC group, the H-SCC group exhibited significantly lower lactose and fat contents in milk, reduced rumen fermentation product levels, and increased abundances of Bacteroidetes, Firmicutes, Lachnospiraceae, Prevotella, and Rumiclostridium. Elevated serum levels of IgG2, IgM, IL-1β, IL-6, and TNF-ɑ in the H-SCC group indicated inflammation and rumen microbiota dysbiosis. Functional analysis of microbial communities revealed significant enrichment in pathways related to glutathione metabolism, thyroid hormone synthesis, hypertrophic cardiomyopathy (HCM), the phosphotransferase system (PTS), the P53 signaling pathway, and the Jak-STAT signaling pathway. Correlation network analysis showed that changes in bacterial families, such as Rikenellaceae, Muribaculaceae, and Prevotellaceae, were associated with cytokines, rumen fermentation, and milk quality. The study highlights the interaction between rumen microbiota homeostasis and mammary gland health, indicating that rumen fermentation status influences serum inflammation and milk quality. Modulating rumen fermentation to enhance mammary gland immune function presents a viable strategy for sustainable dairy industry development with long-lived, highly productive cows.IMPORTANCEHigh somatic cell counts (SCCs) are a key biomarker of mastitis and are associated with decreased milk production and significant economic losses in dairy farming. This study systematically examines the relationship between elevated SCCs, rumen microbial dysbiosis, and host inflammatory responses, shedding light on the intricate interplay between microbial ecosystems and host physiology. The findings highlight the potential for microbiota-targeted interventions to reduce inflammation, improve milk composition, and enhance dairy cow productivity. Rather than presuming a direct causative link between SCC-associated dysbiosis and inflammation, this research focuses on their interdependent dynamics, offering a nuanced understanding of the complex biological mechanisms involved. This work advances knowledge of host-microbiota interactions in livestock, providing practical insights for the development of innovative strategies to manage mastitis and improve overall herd health. By adhering to One Health principles, this study underscores the significance of sustainable agricultural practices that prioritize animal welfare, environmental stewardship, and food security. These findings establish a robust foundation for future research into microbiota-driven solutions aimed at enhancing the health and productivity of dairy cattle.}, }
@article {pmid40102546, year = {2025}, author = {Lechleiter, N and Wedemeyer, J and Schütz, A and Sehl-Ewert, J and Schaufler, K and Homeier-Bachmann, T}, title = {Metagenomic analysis of the faecal microbiota and AMR in roe deer in Western Pomerania.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {9288}, pmid = {40102546}, issn = {2045-2322}, mesh = {Animals ; *Deer/microbiology ; *Feces/microbiology ; *Metagenomics/methods ; *Microbiota/genetics ; *Metagenome ; Bacteria/genetics/drug effects/classification ; *Drug Resistance, Bacterial/genetics ; Gastrointestinal Microbiome ; Escherichia coli/genetics/drug effects ; }, abstract = {As an integral part of the global wellbeing, the health of wild animals should be regarded just as important as that of humans and livestock. The investigation of wildlife health, however, is limited by the availability of samples. In an attempt to implement a method with little invasiveness and broad areas of application, shotgun metagenomics were utilised to investigate the faecal microbiome and its antimicrobial resistance genes (AMRG) in roe deer. These genes can facilitate antimicrobial resistances (AMR) in bacteria and are therefore of increasing importance in global health. Accordingly, the abundance in potential vectors like wildlife needs to be assessed. The samples were additionally investigated for ESBL-E. coli, an antibiotic resistant pathogen of global concern, via cultivation. Twenty-seven hunt-harvested animals in Western Pomerania were sampled. This study is the first to our knowledge to describe the faecal microbiome of the European roe deer (Capreolus capreolus), providing insights into the bacterial and archaeal composition. Among the animals, the microbiome was mostly similar and showed a comparable composition to what has been reported in related species, with a ratio of 1.76 between Bacillota and Bacteroidota. The normalised abundance of AMR genes was found to be 0.035 on average, which is similar to other investigations on wild ruminants. Selective cultivation found no ESBL-E. coli in the animals. The prevalence of AMRG in roe deer of Western Pomerania was found to be in line with previous results. The use of shotgun metagenomics allowed for the simultaneous investigation of composition and AMR genes in the faecal microbiome of roe deer, which suggests it as a promising method for the health monitoring of wildlife. This study is the first to describe the prokaryotic assemblage in the faeces of roe deer and its differences to the microbiomes published on other cervids were discussed.}, }
@article {pmid40102379, year = {2025}, author = {Deng, L and Taelman, S and Olm, MR and Toe, LC and Balini, E and Ouédraogo, LO and Bastos-Moreira, Y and Argaw, A and Tesfamariam, K and Sonnenburg, ED and Hanley-Cook, GT and Ouédraogo, M and Ganaba, R and Van Criekinge, W and Huybregts, L and Stock, M and Kolsteren, P and Sonnenburg, JL and Lachat, C and Dailey-Chwalibóg, T}, title = {Maternal balanced energy-protein supplementation reshapes the maternal gut microbiome and enhances carbohydrate metabolism in infants: a randomized controlled trial.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {2683}, pmid = {40102379}, issn = {2041-1723}, support = {OPP1175213//Bill and Melinda Gates Foundation (Bill &amp; Melinda Gates Foundation)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/physiology ; Female ; *Dietary Supplements ; Infant ; *Carbohydrate Metabolism/drug effects ; Pregnancy ; Adult ; Burkina Faso ; Male ; Infant, Newborn ; *Dietary Proteins/administration &amp; dosage ; Lactation ; Feces/microbiology ; Maternal Nutritional Physiological Phenomena ; }, abstract = {Balanced energy-protein (BEP) supplementation during pregnancy and lactation can improve birth outcomes and infant growth, with the gut microbiome as a potential mediator. The MISAME-III randomized controlled trial (ClinicalTrial.gov: NCT03533712) assessed the effect of BEP supplementation, provided during pregnancy and the first six months of lactation, on small-for-gestational age prevalence and length-for-age Z-scores at six months in rural Burkina Faso. Nested within MISAME-III, this sub-study examines the impact of BEP supplementation on maternal and infant gut microbiomes and their mediating role in birth outcomes and infant growth. A total of 152 mother-infant dyads (n = 71 intervention, n = 81 control) were included for metagenomic sequencing, with stool samples collected at the second and third trimesters, and at 1-2 and 5-6 months postpartum. BEP supplementation significantly altered maternal gut microbiome diversity, composition, and function, particularly those with immune-modulatory properties. Pathways linked to lipopolysaccharide biosynthesis were depleted and the species Bacteroides fragilis was enriched in BEP-supplemented mothers. Maternal BEP supplementation also accelerated infant microbiome changes and enhanced carbohydrate metabolism. Causal mediation analyses identified specific taxa mediating the effect of BEP on birth outcomes and infant growth. These findings suggest that maternal supplementation modulates gut microbiome composition and influences early-life development in resource-limited settings.}, }
@article {pmid40101714, year = {2025}, author = {Lynn, HM and Gordon, JI}, title = {Sequential co-assembly reduces computational resources and errors in metagenome-assembled genomes.}, journal = {Cell reports methods}, volume = {5}, number = {3}, pages = {101005}, pmid = {40101714}, issn = {2667-2375}, mesh = {*Metagenome/genetics ; Animals ; Mice ; Gastrointestinal Microbiome/genetics ; Humans ; *Computational Biology/methods ; Sequence Analysis, DNA/methods ; }, abstract = {Generating metagenome-assembled genomes from DNA shotgun sequencing datasets can demand considerable computational resources. Here, we describe a sequential co-assembly method that reduces the assembly of duplicate reads through successive application of single-node computing tools for read assembly and mapping. Using a simulated mouse microbiome DNA shotgun sequencing dataset, we demonstrated that this approach shortens assembly time, uses less memory than traditional co-assembly, and produces significantly fewer assembly errors. Applying sequential co-assembly to shotgun sequencing reads from (1) a longitudinal study of gut microbiomes from undernourished Bangladeshi children and (2) a 2.3-terabyte dataset generated from gnotobiotic mice colonized with pooled microbiomes from these children that was too large to be handled by a traditional co-assembly approach also demonstrated significant reductions in assembly time and memory requirements. These results suggest that this approach should be useful in resource-constrained settings, including in low- and middle-income countries.}, }
@article {pmid40101514, year = {2025}, author = {Zhang, X and Wu, L and Gu, L and Jiang, Q and He, Z and Qi, Y and Zheng, X and Xu, T}, title = {Dietary areca nut extract supplementation modulates the growth performance and immunity of Jiaji ducks (Cairina moschata).}, journal = {Poultry science}, volume = {104}, number = {5}, pages = {104971}, pmid = {40101514}, issn = {1525-3171}, mesh = {Animals ; *Ducks/growth &amp; development/immunology ; Dietary Supplements/analysis ; Animal Feed/analysis ; Diet/veterinary ; *Plant Extracts/administration &amp; dosage/metabolism ; Random Allocation ; *Areca/chemistry ; Gastrointestinal Microbiome/drug effects ; Nuts/chemistry ; *Immunity, Innate/drug effects ; }, abstract = {Areca nut extract (ANE) has a variety of pharmacological effects on animals. Here, we investigated the influence of ANE on the slaughter performance and immune function of Jiaji ducks. One hundred and fifty 42-day-old healthy Jiaji ducks were randomly divided into 2 groups (5 replicates of 15 ducks each), named DCK group (control) and DNT group (treatment), respectively. Ducks in the DCK group were fed a basal diet and ducks in the DNT group were fed a basal food supplemented with 0.08 g ANE per kg of basal diet. Additionally, using proteomics, untargeted metabolomics, and metagenomics, we analyzed the impact of ANE on the protein profile of the spleen, the composition of plasma metabolites, and the structure of the cecal microbiota. The results showed that the dietary inclusion of ANE significantly increased the slaughter rate of Jiaji ducks. Proteomic analysis revealed 78 differentially expressed proteins in the spleens of ANE-treated birds, including 54 proteins up-regulated and 24 proteins down-regulated in the DNT group, mainly enriched in cell adhesion molecules and glutathione metabolic pathways. Untargeted metabolomic analysis revealed that 117 serum metabolites were differentially regulated between the ANE and DCK groups; meanwhile, KEGG pathway analysis indicated that these metabolites were mainly involved in arachidonic acid metabolism, phospholipase D signaling pathway and eicosanoids. Furthermore, a metagenomic analysis showed that the genus Methanobrevibacter was significantly downregulated in the ANE supplementation group. Combined, the results of the metagenomic and metabolomic analyses showed that the relative abundance of Prevotella was significantly lower in the ANE group than in the DCK group and that Prevotella was negatively correlated with the levels of the anti-inflammatory compound hydrocinnamic acid and the lipid metabolism regulator ganoderic acid A. This study provides a reference for the application of ANE as a supplement in the diet of Jiaji ducks.}, }
@article {pmid40101486, year = {2025}, author = {Sun, J and Geng, L and Zhou, D and Teng, X and Chen, M}, title = {Gut microbiota participates in polystyrene microplastics-induced defective implantation through impairing uterine receptivity.}, journal = {Journal of environmental management}, volume = {380}, number = {}, pages = {124997}, doi = {10.1016/j.jenvman.2025.124997}, pmid = {40101486}, issn = {1095-8630}, mesh = {*Gastrointestinal Microbiome/drug effects ; Animals ; Mice ; Female ; *Microplastics/toxicity ; *Polystyrenes/toxicity ; Uterus/drug effects ; }, abstract = {Microplastics (MPs) are widespread in global ecosystems and could pose risks to human health. However, crucial information on the impact of MP exposure on female reproductive health remains insufficient. In this study, we constructed an MP-exposure mice model through oral administration of polystyrene microplastics (PS-MPs) and found that it resulted in impaired uterine receptivity and defective implantation. An accumulation of plastic particles was detected in MP mice intestines. Metagenomic sequencing of feces samples indicated a structural and functional alteration of gut microbiota. Alistipes played a prominent role in MP biodegradation, while among the biodegradable functional genes, ACSL made the greatest contribution. Both had a significant increase in MP group, suggesting a potential occurrence of ferroptosis. Ferroptosis, a form of programmed cell death, is closely associated with uterine receptivity impairment and defective implantation. We detected MDA contents and ferroptosis-related proteins, and the results indicated the activation of ferroptosis in the process. Our research is the first to elucidate that exposure to MPs impairs uterine receptivity and results in deficient implantation, while also providing initial evidence that gut microbiota plays a critical role in this process.}, }
@article {pmid40100697, year = {2025}, author = {Sun, J and Hirai, M and Takaki, Y and Evans, PN and Nunoura, T and Rinke, C}, title = {Metagenomic insights into taxonomic and functional patterns in shallow coastal and deep subseafloor sediments in the Western Pacific.}, journal = {Microbial genomics}, volume = {11}, number = {3}, pages = {}, pmid = {40100697}, issn = {2057-5858}, mesh = {*Geologic Sediments/microbiology ; *Metagenomics/methods ; *Archaea/genetics/classification/metabolism ; Pacific Ocean ; *Bacteria/genetics/classification/metabolism ; *Metagenome ; Phylogeny ; Microbiota/genetics ; }, abstract = {Marine sediments are vast, underexplored habitats and represent one of the largest carbon deposits on our planet. Microbial communities drive nutrient cycling in these sediments, but the full extent of their taxonomic and metabolic diversity remains to be explored. Here, we analysed shallow coastal and deep subseafloor sediment cores from 0.01 to nearly 600 metres below the seafloor, in the Western Pacific Region. Applying metagenomics, we identified several taxonomic clusters across all samples, which mainly aligned with depth and sediment type. Inferring functional patterns provided insights into possible ecological roles of the main microbial taxa. These included Chloroflexota, the most abundant phylum across all samples, whereby the classes Dehalococcoida and Anaerolineae dominated deep-subsurface and most shallow coastal sediments, respectively. Thermoproteota and Asgardarchaeota were the most abundant phyla among Archaea, contributing to high relative abundances of Archaea reaching over 50% in some samples. We recovered high-quality metagenome-assembled genomes for all main prokaryotic lineages and proposed names for three phyla, i.e. Tangaroaeota phyl. nov. (former RBG-13-66-14), Ryujiniota phyl. nov. (former UBA6262) and Spongiamicota phyl. nov. (former UBA8248). Metabolic capabilities across all samples ranged from aerobic respiration and photosynthesis in the shallowest sediment layers to heterotrophic carbon utilization, sulphate reduction and methanogenesis in deeper anoxic sediments. We also identified taxa with the potential to be involved in nitrogen and sulphur cycling and heterotrophic carbon utilization. In summary, this study contributes to our understanding of the taxonomic and functional diversity in benthic prokaryotic communities across marine sediments in the Western Pacific Region.}, }
@article {pmid40098591, year = {2025}, author = {Hernández-Trujillo, PN and Lopez-Barón, CA and Arévalo-Pinzón, G and Trujillo-Güiza, ML and González-Duque, MI and Flórez, AM and Franco, DC and Vanegas, J}, title = {Taxonomic and functional profile of the anorectal microbiota in HIV-positive and HIV-negative men who have sex with men, using a metagenomic approach.}, journal = {HIV medicine}, volume = {26}, number = {5}, pages = {785-799}, doi = {10.1111/hiv.70014}, pmid = {40098591}, issn = {1468-1293}, support = {2022218//Universidad Antonio Nari&#xf1;o/ ; }, mesh = {Humans ; Male ; Adult ; *Homosexuality, Male ; Metagenomics ; *HIV Infections/microbiology ; *Anal Canal/microbiology ; Middle Aged ; *Rectum/microbiology ; *Microbiota/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; Gastrointestinal Microbiome ; }, abstract = {INTRODUCTION: The study of bacterial diversity in human samples is crucial for developing biomarkers of health and disease. This research characterized the taxonomic and functional diversity of the anorectal bacterial microbiota in men who hae sex with men (MSM) with HIV compared to men from this group without HIV.<br><br>MATERIALS AND METHODS: In July and August 2023, self-collected anorectal swabs were obtained. DNA was extracted from each sample, and metagenomic sequencing was performed. With the obtained data, alpha and beta diversity, bacterial abundance, differential operational taxonomic units, and functional diversity were determined.<br><br>RESULTS: Initially, 90 samples were collected, with 20 discarded due to having less than 200&#x2009;ng of DNA and 15 due to incomplete sequencing, leaving 55 samples analysed (15 HIV-positive and 40 HIV-negative). No significant differences were found between groups in terms of alpha diversity (Shannon index p&#x2009;=&#x2009;0.45) and beta diversity (PERMANOVA R&#x2009;=&#x2009;-0.03). Prevotella was identified as the most abundant genus in both groups. Twelve genes were found to be more abundant in the anorectal microbiota of the HIV group, which promote bacterial growth, colonization and survival.<br><br>CONCLUSION: Alterations in the anorectal microbiota could influence the pathogenesis of HIV and its complications in this population, underscoring the need to investigate these mechanisms and explore interventions to improve health. Longitudinal studies are needed to analyse changes in the anorectal microbiota during HIV infection and its response to treatment, integrating metagenomic, clinical, and immunological data to better understand the interactions between HIV, the microbiota and host health.}, }
@article {pmid40098558, year = {2025}, author = {Di Rienzi, SC and Danhof, HA and Forshee, MD and Roberts, A and Britton, RA}, title = {Limosilactobacillus reuteri promotes the expression and secretion of enteroendocrine- and enterocyte-derived hormones.}, journal = {FASEB journal : official publication of the Federation of American Societies for Experimental Biology}, volume = {39}, number = {6}, pages = {e70408}, pmid = {40098558}, issn = {1530-6860}, support = {//BioGaia/ ; F32 AI136404/AI/NIAID NIH HHS/United States ; P30 DK056338/DK/NIDDK NIH HHS/United States ; T15 LM007093/LM/NLM NIH HHS/United States ; //Weston Family Foundation (WFF)/ ; }, mesh = {*Limosilactobacillus reuteri/physiology/metabolism ; *Enteroendocrine Cells/metabolism/microbiology ; Humans ; *Enterocytes/metabolism/microbiology ; *Gastrointestinal Hormones/metabolism/genetics ; Gastrointestinal Microbiome/physiology ; }, abstract = {Intestinal microbes can beneficially impact host physiology, prompting investigations into the therapeutic usage of such microbes in a range of diseases. For example, human intestinal microbe Limosilactobacillus reuteri strains ATCC PTA 6475 and DSM 17938 are being considered for use for intestinal ailments, including colic, infection, and inflammation, as well as for non-intestinal ailments, including osteoporosis, wound healing, and autism spectrum disorder. While many of their beneficial properties are attributed to suppressing inflammatory responses, we postulated that L. reuteri may also regulate intestinal hormones to affect physiology within and outside of the gut. To determine if L. reuteri secreted factors impact the secretion of enteric hormones, we treated an engineered jejunal organoid line, NGN3-HIO, which can be induced to be enriched in enteroendocrine cells, with L. reuteri 6475 or 17938 conditioned medium and performed transcriptomics. Our data suggest that these L. reuteri strains affect the transcription of many gut hormones, including vasopressin and luteinizing hormone subunit beta, which have not been previously recognized as produced in the gut epithelium. Moreover, we find that these hormones appear to be produced in enterocytes, in contrast to canonical gut hormones produced in enteroendocrine cells. Finally, we show that L. reuteri conditioned media promote the secretion of enteric hormones, including serotonin, GIP, PYY, vasopressin, and luteinizing hormone subunit beta, and identify by metabolomics metabolites potentially mediating these effects on hormones. These results support L. reuteri affecting host physiology through intestinal hormone secretion, thereby expanding our understanding of the mechanistic actions of this microbe.}, }
@article {pmid40098172, year = {2025}, author = {Raziq, MF and Khan, N and Manzoor, H and Tariq, HMA and Rafiq, M and Rasool, S and Kayani, MUR and Huang, L}, title = {Prioritizing gut microbial SNPs linked to immunotherapy outcomes in NSCLC patients by integrative bioinformatics analysis.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {343}, pmid = {40098172}, issn = {1479-5876}, mesh = {Humans ; *Polymorphism, Single Nucleotide/genetics ; *Carcinoma, Non-Small-Cell Lung/therapy/microbiology/genetics/immunology/drug therapy ; *Gastrointestinal Microbiome/genetics ; *Computational Biology/methods ; *Lung Neoplasms/therapy/microbiology/genetics/immunology/drug therapy ; *Immunotherapy ; Treatment Outcome ; Male ; Machine Learning ; Female ; }, abstract = {BACKGROUND: The human gut microbiome has emerged as a potential modulator of treatment efficacy for different cancers, including non-small cell lung cancer (NSCLC) patients undergoing immune checkpoint inhibitor (ICI) therapy. In this study, we investigated the association of gut microbial variations with response against ICIs by analyzing the gut metagenomes of NSCLC patients.<br><br>METHODS: Strain identification from the publicly available metagenomes of 87 NSCLC patients, treated with nivolumab and collected at three different timepoints (T0, T1, and T2), was performed using StrainPhlAn3. Variant calling and annotations were performed using Snippy and associations between microbial genes and genomic variations with treatment responses were evaluated using MaAsLin2. Supervised machine learning models were developed to prioritize single nucleotide polymorphisms (SNPs) predictive of treatment response. Structural bioinformatics approaches were employed using MUpro, I-Mutant 2.0, CASTp and PyMOL to access the functional impact of prioritized SNPs on protein stability and active site interactions.<br><br>RESULTS: Our findings revealed the presence of strains for several microbial species (e.g., Lachnospira eligens) exclusively in Responders (R) or Non-responders (NR) (e.g., Parabacteroides distasonis). Variant calling and annotations for the identified strains from R and NR patients highlighted variations in genes (e.g., ftsA, lpdA, and nadB) that were significantly associated with the NR status of patients. Among the developed models, Logistic Regression performed best (accuracy&#x2009;>&#x2009;90% and AUC ROC&#x2009;>&#x2009;95%) in prioritizing SNPs in genes that could distinguish R and NR at T0. These SNPs included Ala168Val (lpdA) in Phocaeicola dorei and Tyr233His (lpdA), Leu330Ser (lpdA), and His233Arg (obgE) in Parabacteroides distasonis. Lastly, structural analyses of these prioritized variants in objE and lpdA revealed their involvement in the substrate binding site and an overall reduction in protein stability. This suggests that these variations might likely disrupt substrate interactions and compromise protein stability, thereby impairing normal protein functionality.<br><br>CONCLUSION: The integration of metagenomics, machine learning, and structural bioinformatics provides a robust framework for understanding the association between gut microbial variations and treatment response, paving the way for personalized therapies for NSCLC in the future. These findings emphasize the potential clinical implications of microbiome-based biomarkers in guiding patient-specific treatment strategies and improving immunotherapy outcomes.}, }
@article {pmid40097931, year = {2025}, author = {Boutin, S and Käding, N and Belheouane, M and Merker, M and Rupp, J and Nurjadi, D}, title = {Towards unraveling antimicrobial resistance dynamics: a longitudinal exploration of rectal swab metagenomes.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {150}, pmid = {40097931}, issn = {1471-2180}, mesh = {Humans ; *Rectum/microbiology ; *Metagenome ; Metagenomics/methods ; Anti-Bacterial Agents/pharmacology ; *Bacteria/genetics/drug effects/isolation &amp; purification/classification ; Whole Genome Sequencing ; *Drug Resistance, Multiple, Bacterial/genetics ; Male ; Longitudinal Studies ; Microbial Sensitivity Tests ; Female ; Middle Aged ; Gastrointestinal Microbiome/genetics ; Aged ; }, abstract = {The increasing prevalence of antimicrobial resistance (AMR) poses significant challenges in clinical settings. In particular, early screening and detection of colonization by multidrug-resistant organisms (MDROs) in patients at admission is crucial. In this context, the clinical use of metagenomics (mNGS) holds promise for fast and untargeted diagnostic methods. Here, we aimed to evaluate the long-term stability of the rectal microbiome and the diagnostic accuracy of mNGS in comparison to culture and whole-genome sequencing (WGS) of MDROs. We analyzed rectal swabs from 26 patients with two consecutive admissions over a four-year period. The detected antimicrobial resistance genes and assembled metagenomes were compared to those obtained via classical culture-based antimicrobial susceptibility testing and WGS of isolated MDROs. Our results showed that the rectal microbiome is variable during the two timepoints, highlighting the variability in the niche. Nevertheless, we also observed strong co-occurrence of taxa, suggesting that the rectal swab microbiome is also a regulated environment with cooperative biotic interactions. In total, we isolated and sequenced 6 MDROs from 6 patients at individual timepoints. Almost all AMR genes from the genomes of the isolates (median: 100%, range: 84.6-100%) could be detected by mNGS of the rectal swabs at the time of isolation of the MDRO but not at the time of culture negativity. In addition, we detected AMR genes and potentially pathogenic species in patients with negative cultures. In conclusion, our study showed that, in principle, mNGS of rectal swabs can detect clinically relevant AMR profiles. However, the cooccurrence of AMR genes and potentially-pathogenic species does not always correlate with culture-based diagnostic results but rather indicates a potential risk of horizontal AMR gene transfer. However, it is unclear whether the observed discrepancies are due to transient or locally confined colonization of MDROs, limits of detection, or variability of the sampling method and specimens.}, }
@article {pmid40097230, year = {2025}, author = {Nair, SS and Kutty Narayanan, A and Nair, K and Mallick, S and Zackariah, NM and Biswas, L and Praseedom, R and G Nair, BK and Surendran, S}, title = {Microbiota-directed intervention in living donor liver transplant recipients: protocol for a randomised double-blind placebo-controlled trial.}, journal = {BMJ open}, volume = {15}, number = {3}, pages = {e092984}, pmid = {40097230}, issn = {2044-6055}, mesh = {Humans ; *Liver Transplantation/adverse effects/methods ; Double-Blind Method ; *Living Donors ; *Synbiotics/administration &amp; dosage ; Randomized Controlled Trials as Topic ; Probiotics/therapeutic use/administration &amp; dosage ; *Gastrointestinal Microbiome ; *Acute-On-Chronic Liver Failure/surgery/microbiology/therapy ; Male ; Female ; Adult ; *Postoperative Complications/prevention &amp; control ; }, abstract = {INTRODUCTION: Acute-on-chronic liver failure (ACLF) patients have the highest propensity for post-liver transplantation (LT) infections and mortality. Liver-associated diseases have been one of the primary targets for synbiotic therapy to augment immunity and mitigate infections. However, despite multiple studies showing benefits of synbiotics in liver diseases, data on their use following LT are sparse.<br><br>METHODS AND ANALYSIS: This randomised placebo-controlled study aims to assess the impact of synbiotics in ACLF patients undergoing living donor liver transplantation (LDLT). Following randomisation by computer-generated block number sequence, 3&#x2009;days prior to LDLT, the intervention arm will receive standard medical treatment and synbiotics (VSL#3 a probiotic, and Yogut, prebiotic and probiotic combination) for 6&#x2009;weeks, while the control arm will receive standard medical treatment with a placebo. The patients will be followed up for 6&#x2009;months to study the clinical and biochemical outcomes. The primary objective is to compare the difference in the occurrence of infectious complications between the patients who receive synbiotics versus placebo during the 6-month period following LDLT. The secondary objectives include assessing the qualitative and quantitative change in microbiota with synbiotics and LDLT, adverse reactions due to synbiotics, and post-LT morbidity and mortality. The minimum sample size comes to 71 in each group. The first 50 patients in the study protocol will undergo gut microbiome analysis using 16s metagenomic and nanopore sequencing to analyse the microbial composition before starting synbiotics/placebo and at 6 weeks after LDLT.<br><br>ETHICS AND DISSEMINATION: The study is approved by the Research Ethics Committee of Amrita Institute of Medical Sciences, Kochi, India (IEC-AIMS-2022-GISUR-203) and registered in the Clinical Trial Registry of India (CTRI) CTRI/2022/10/046327. The results of the trial will be disseminated by presentation at national/international conferences and publication in peer-reviewed journals.<br><br>TRIAL REGISTRATION NUMBER: CTRI/2022/10/046327 - Clinical Trial Registry of India.}, }
@article {pmid40096540, year = {2025}, author = {Zhang, Q and Li, J and Tuo, J and Liu, S and Liu, Y and Liu, P and Ye, L and Zhang, XX}, title = {Long-term metagenomic insights into the roles of antiviral defense systems in stabilizing activated sludge bacterial communities.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40096540}, issn = {1751-7370}, support = {BE2022837//Jiangsu Province Key Research and Development Program/ ; 52200057//National Natural Science Foundation of China/ ; }, mesh = {*Sewage/microbiology ; *Bacteria/virology/genetics/classification ; *Bacteriophages/genetics ; Metagenomics ; *Metagenome ; *Microbiota ; }, abstract = {Bacteria have evolved various antiviral defense systems (DSs) to protect themselves, but how DSs respond to the variation of bacteriophages in complex bacterial communities and whether DSs function effectively in maintaining the stability of bacterial community structure and function remain unknown. Here, we conducted a long-term metagenomic investigation on the composition of bacterial and phage communities of monthly collected activated sludge (AS) samples from two full-scale wastewater treatment plants over 6 years and found that DSs were widespread in AS, with 91.1% of metagenome-assembled genomes (MAGs) having more than one complete DS. The stability of the bacterial community was maintained under the fluctuations of the phage community, and DS abundance and phage abundance were strongly positively correlated; there was a 0-3-month time lag in the responses of DSs to phage fluctuations. The rapid turnover of clustered regularly interspaced short palindromic repeat spacer repertoires further highlighted the dynamic nature of bacterial defense mechanisms. A pan-immunity phenomenon was also observed, with nearly identical MAGs showing significant differences in DS composition, which contributed to community stability at the species level. This study provides novel insights into the complexity of phage-bacteria interactions in complex bacterial communities and reveals the key roles of DSs in stabilizing bacterial community structure and function.}, }
@article {pmid40094563, year = {2025}, author = {Cheng, W and Yi, L and Xu, T and Xie, Y and Zhu, J and Guan, X and Li, Q and Huang, Y and Zhao, Y and Zhao, S}, title = {The stems and leaves of Panax notoginseng reduce the abundance of antibiotic resistance genes by regulating intestinal microbiota in Duzang pigs.}, journal = {Animal biotechnology}, volume = {36}, number = {1}, pages = {2471785}, doi = {10.1080/10495398.2025.2471785}, pmid = {40094563}, issn = {1532-2378}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/genetics ; *Panax notoginseng/chemistry ; Swine/microbiology ; *Plant Leaves/chemistry ; *Plant Stems/chemistry ; *Drug Resistance, Microbial/genetics ; Animal Feed/analysis ; Anti-Bacterial Agents/pharmacology ; }, abstract = {In order to study the distribution characteristics of intestinal microbiota and antibiotic resistance genes (ARGs) in Duzang pigs after adding stems and leaves of Panax notoginseng to the feed, the characteristics of intestinal microbiota were explored by metagenomic sequencing, and 14 ARGs and 2 integrase genes were detected by qPCR. The results showed that the addition of stems and leaves of P. notoginseng increased the relative abundance of Firmicutes, Lactobacillus and Pediococcus in the cecum of Duzang pigs. A total of 10 ARGs and 2 integrase genes were detected in the cecal contents of pigs. The addition of stems and leaves of P. notoginseng reduced the relative abundance of total ARGs, ermB, tetO and tetW in the cecum of Duzang pigs. The results of network analysis showed that multiple genera were potential hosts of ARGs. The addition of stems and leaves of P. notoginseng may reduce the relative abundance of ARGs by reducing the relative abundance of genera such as Corynebacterium and Flavonifractor, thereby reducing the risk of ARGs spread. This study provides a theoretical basis for the rational use of stems and leaves of P. notoginseng to control ARGs.}, }
@article {pmid40094201, year = {2025}, author = {Masaadeh, AH and Eletrebi, M and Parajuli, B and De Jager, N and Bosch, DE}, title = {Human colitis-associated colorectal carcinoma progression is accompanied by dysbiosis with enriched pathobionts.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2479774}, pmid = {40094201}, issn = {1949-0984}, support = {K08 AI159619/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Dysbiosis/microbiology/complications ; Male ; Female ; Middle Aged ; *Gastrointestinal Microbiome ; *Colitis-Associated Neoplasms/microbiology/pathology ; Disease Progression ; *Bacteria/classification/genetics/isolation &amp; purification ; *Colorectal Neoplasms/microbiology/pathology ; Aged ; Adult ; Inflammatory Bowel Diseases/microbiology/pathology ; RNA, Ribosomal, 16S/genetics ; *Colitis/microbiology/complications ; Metagenomics ; }, abstract = {Dysbiosis and pathobionts contribute to inflammation and the risk of colitis-associated carcinoma (CAC) in animal models, but their roles in humans with this uncommon disease are unknown. We identified microbiome differences in human CAC compared with longstanding inflammatory bowel disease (IBD) and sporadic colorectal carcinoma (CRC). Twenty-four CAC resections were matched with CRC and IBD controls. Methods included histopathology, 16S rDNA metagenomics, and pathobiont-specific qPCR. Beta diversity differed by diagnosis (PERMANOVA p = 0.007). The distinguishing taxa included Akkermansia enriched in CRC, and Bacteroides spp. enriched in IBD. The non-neoplastic mucosae presented distinct beta diversity (p = 0.005), but the CAC/CRC tumor microbiomes were similar (p = 0.7). Within metastases and margins, Enterobacteriaceae were enriched in CAC, and Bacteroidales in CRC. Pathobiont-specific qPCR confirmed a greater frequency of pks+ E. coli and enterotoxigenic Bacteroides fragilis in CAC than IBD. High alpha diversity was associated with active inflammation, advanced cancer stage, and shorter overall survival (log-rank p = 0.008). Mucosal microbiomes distinguish CAC from longstanding IBD, implicating pathobionts as markers for disease progression. Integrating our findings with prior animal model research, pathobionts promote carcinogenesis in IBD patients through genotoxicity and host cell signaling.}, }
@article {pmid40091534, year = {2025}, author = {Lu, YM and Lu, JQ and Zhao, Q and Chen, J and Xiong, JB}, title = {Pathogenic mechanisms of Enterocytozoon hepatopenaei through the parasite-gut microbiome-shrimp (Litopenaeus vannamei) physiology axis.}, journal = {Zoological research}, volume = {46}, number = {2}, pages = {401-413}, pmid = {40091534}, issn = {2095-8137}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Penaeidae/microbiology/physiology/parasitology ; *Enterocytozoon/physiology/pathogenicity ; }, abstract = {The progressive impact of Enterocytozoon hepatopenaei (EHP) infection on gut microbial function in Litopenaeus vannamei remains poorly understood beyond static comparisons between healthy and infected individuals. To close this knowledge gap, metagenomic sequencing was used to characterize the gut microbiomes of normal, long, medium, and short-sized adult shrimp categorized by increasing severity of infection. EHP infection suppressed digestive activity while inducing immune responses compared with healthy shrimp. Increasing infection severity was associated with a gradual decline in gut α-diversity and an expansion of potential pathogens and virulence factors (VFs). In addition, dysbiosis in gut microbiota composition and function, as well as reduced network stability among differential species, intensified with infection severity. Accordingly, we identified 24 EHP-discriminatory species that contributed an overall 83.3% accuracy in diagnosing infection severity without false negatives. Functional pathway analysis revealed significant suppression of metabolic, degradative, and biosynthetic processes in EHP-infected shrimp compared with healthy controls. Among them, map00630 glyoxylate and dicarboxylate metabolism and map00280 valine, leucine and isoleucine degradation were consistently depleted in infected individuals, thereby impairing their digestive function and anti-inflammatory responses. Additionally, EHP infection diversified VFs directly affecting shrimp gut microbiome. These findings support a conceptual model linking EHP pathogenesis to the parasite-gut microbiome-shrimp physiology axis.}, }
@article {pmid40091083, year = {2025}, author = {Honda, H and Suzuki, T and Kitajima, M and Kondo, NI and Miyata, K and Utsumi, S and Yamada, M}, title = {The new era shaped by environmental genome monitoring - symposium of the japanese environmental mutagen and genome society (JEMS), 2024.}, journal = {Genes and environment : the official journal of the Japanese Environmental Mutagen Society}, volume = {47}, number = {1}, pages = {6}, pmid = {40091083}, issn = {1880-7046}, abstract = {The symposium "The New Era Shaped by Environmental Genome Monitoring," held in December 2024 by the Japanese Environmental Mutagen and Genome Society (JEMS), aimed to explore the interdisciplinary collaborations that are essential for the development of new scopes in environmental genome monitoring. This event highlighted the necessity of integrating mutagenicity research with ecological assessments to enhance public health and biodiversity conservation. Presentations focused on the evolving landscape of environmental genomics, including metagenomic analyses for antibiotic resistance, viral genomic surveillance in wastewater, and innovations in noninvasive biodiversity and stress monitoring through environmental DNA and RNA. This report summarizes the key discussions and presentations from the symposium, underscoring the critical role of environmental genome monitoring in shaping future safety research.}, }
@article {pmid40090954, year = {2025}, author = {Lund, D and Parras-Moltó, M and Inda-Díaz, JS and Ebmeyer, S and Larsson, DGJ and Johnning, A and Kristiansson, E}, title = {Genetic compatibility and ecological connectivity drive the dissemination of antibiotic resistance genes.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {2595}, pmid = {40090954}, issn = {2041-1723}, support = {2018-02835//Vetenskapsr&#xe5;det (Swedish Research Council)/ ; 2018-05771//Vetenskapsr&#xe5;det (Swedish Research Council)/ ; 2019-03482//Vetenskapsr&#xe5;det (Swedish Research Council)/ ; 2022-00945//Vetenskapsr&#xe5;det (Swedish Research Council)/ ; }, mesh = {*Gene Transfer, Horizontal ; Phylogeny ; Humans ; *Bacteria/genetics/drug effects/classification ; Wastewater/microbiology ; Animals ; Microbiota/genetics ; *Drug Resistance, Bacterial/genetics ; Metagenome/genetics ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Microbial/genetics ; Genome, Bacterial ; *Genes, Bacterial ; }, abstract = {The dissemination of mobile antibiotic resistance genes (ARGs) via horizontal gene transfer is a significant threat to public health globally. The flow of ARGs into and between pathogens, however, remains poorly understood, limiting our ability to develop strategies for managing the antibiotic resistance crisis. Therefore, we aim to identify genetic and ecological factors that are fundamental for successful horizontal ARG transfer. We used a phylogenetic method to identify instances of horizontal ARG transfer in ~1 million bacterial genomes. This data was then integrated with >20,000 metagenomes representing animal, human, soil, water, and wastewater microbiomes to develop random forest models that can reliably predict horizontal ARG transfer between bacteria. Our results suggest that genetic incompatibility, measured as nucleotide composition dissimilarity, negatively influences the likelihood of transfer of ARGs between evolutionarily divergent bacteria. Conversely, environmental co-occurrence increases the likelihood, especially in humans and wastewater, in which several environment-specific dissemination patterns are observed. This study provides data-driven ways to predict the spread of ARGs and provides insights into the mechanisms governing this evolutionary process.}, }
@article {pmid40090144, year = {2025}, author = {Deng, B and Ren, Z and Li, Q and Zhang, Z and Xu, C and Wang, P and Zhao, H and Yuan, Q}, title = {Black soldier fly larvae mediate Zinc and Chromium transformation through the ZnuCBA and citric acid cycle system.}, journal = {Water research}, volume = {280}, number = {}, pages = {123483}, doi = {10.1016/j.watres.2025.123483}, pmid = {40090144}, issn = {1879-2448}, mesh = {Animals ; Larva/metabolism ; *Zinc/metabolism ; *Chromium/metabolism ; *Citric Acid Cycle ; *Simuliidae/metabolism ; Gastrointestinal Microbiome ; }, abstract = {Intestinal microbiota and metal regulatory proteins (MRPs) underlie the transformation of heavy metals (HMs) by the black soldier fly larvae (BSFL), but the mechanisms involved are still not fully defined. Here, using 16S rRNA and metagenomics-assisted tracing, we found that zinc (Zn) and chromium (Cr) stress led to enrichment of Proteobacteria in the BSFL intestine. Support of Proteobacteria also led to increased levels of the Zn transporter proteins ZnuC/B/A and the Zn efflux proteins zntR/A. Meanwhile, the genes MltE, CitT, and SLT, which mediate the citric acid cycle, were also significantly up-regulated and involved in the cellular uptake of Cr. Although Zn and Cr stress affected the expression of antibiotic resistance genes and pathogenic genes, the BSFL intestine tended to form stable microbial communities (MCs) to transform HMs through a mechanism driven by ZupT and chrA. In addition, the expression of SCARB1 and LdcA was significantly down-regulated by acute HMs stimulation, but BSFL were still able to complete the life cycle. Therefore, we determined the protective role of MCs and MRPs on BSFL during the transformation of HMs.}, }
@article {pmid40087549, year = {2025}, author = {Wang, X and Shang, Y and Xing, Y and Chen, Y and Wu, X and Zhang, H}, title = {Captive environments reshape the compositions of carbohydrate active enzymes and virulence factors in wolf gut microbiome.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {142}, pmid = {40087549}, issn = {1471-2180}, support = {2022KJ177//the Youth Innovation Team in Colleges and Universities of Shandong Province/ ; 32001228//the National Natural Science Foundation of China/ ; 32270444//the National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Wolves/microbiology ; *Bacteria/genetics/classification/enzymology/isolation &amp; purification/metabolism ; *Virulence Factors/genetics/metabolism ; Dogs/microbiology ; Animals, Zoo/microbiology ; Foxes/microbiology ; Metagenomics ; Feces/microbiology ; Animals, Wild/microbiology ; Carbohydrate Metabolism ; }, abstract = {Species in the family Canidae occupy different spatial ecological niches, and some (e.g., wolf) can be kept in zoos. The gut microbiome may differ among various wild and captive canids. Therefore, we compared the gut microbiomes of wild canids (wolf, red fox, and corsac fox) in the Hulun Lake area, captive wolves, and domestic dogs in different regions using metagenomic data. A random forest analysis revealed significant enrichment for bacterial species producing short-chain fatty acids and the thermogenesis pathway (ko04714) in the gut microbiome of wild wolf, potentially providing sufficient energy for adaptation to a wide range of spatial ecological niches. The significantly enriched bacterial species and functional pathways in the gut microbiome of corsac foxes were related to physiological stability and adaptation to arid environments. Alpha diversity of carbohydrate-active enzymes in the gut microbiome was higher in the red fox than in the corsac fox and wild wolf, which may be related to the abundance of plant seeds (containing carbohydrates) in their diets (red foxes inhabit seed-rich willow bosk habitats). However, the influence of host genetic factors cannot be excluded, and further experimental studies are needed to verify the study results. In addition, captive environments drove similarity in carbohydrate-active enzymes (CAZymes) and virulence factors (VFs) in the gut microbiomes of captive wolf and domestic dog, and increased the diversity of CAZymes and VFs in the gut microbiome of captive wolf. Increased VFs diversity may increase the pathogenic potential of the gut microbiome in captive wolves. Therefore, it is necessary to continue monitoring the health status of captive wolves and develop appropriate management strategies.}, }
@article {pmid40087044, year = {2025}, author = {Chen, B and Li, Y and Li, Z and Hu, X and Zhen, H and Chen, H and Nie, C and Hou, Y and Zhu, S and Xiao, L and Li, T}, title = {Vitamin E ameliorates blood cholesterol level and alters gut microbiota composition: A randomized controlled trial.}, journal = {Nutrition, metabolism, and cardiovascular diseases : NMCD}, volume = {35}, number = {8}, pages = {103964}, doi = {10.1016/j.numecd.2025.103964}, pmid = {40087044}, issn = {1590-3729}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; *Anticholesteremic Agents/adverse effects/therapeutic use ; *Antioxidants/adverse effects/administration &amp; dosage/therapeutic use ; *Bacteria/metabolism/drug effects/growth &amp; development ; Bile Acids and Salts/metabolism ; Biomarkers/blood ; *Cholesterol, LDL/blood ; *Dietary Supplements/adverse effects ; Double-Blind Method ; Fatty Acids, Volatile/metabolism ; Feces/microbiology ; *Gastrointestinal Microbiome/drug effects ; Grape Seed Extract/adverse effects ; Healthy Volunteers ; Time Factors ; Treatment Outcome ; *Vitamin E/adverse effects/therapeutic use ; }, abstract = {BACKGROUND AND AIMS: Antioxidants, including vitamin E (VE) and grape seed extract (GSE), as anti-aging supplementation have been widely used to improve human health. The gut microbiota plays a crucial role in health and affects the treatment effect of various interventions. However, the role of gut microbiota in VE remains unclear. This study aimed to assess the longitudinal impact of VE treatment on body health and the gut microbiota.<br><br>METHODS AND RESULTS: A randomized controlled trial was conducted with 90 healthy individuals. The participants were randomly assigned to three groups: a treatment group receiving VE, another antioxidant treatment group receiving GSE, and a control group receiving a placebo. We found that VE ameliorated blood cholesterol levels by reducing the levels of low-density lipoprotein cholesterol (LDL-C) in healthy volunteers. After the intervention, there was an increase in the relative abundance of short-chain fatty acid (SCFA)-producing bacteria and bile acid metabolizers. Specifically, the abundances of Lachnospira sp. and Faecalibacterium spp. increased in the VE. Interestingly, the gut microbiota of poor responders harbored a greater proportion of disease-associated bacterial species.<br><br>CONCLUSIONS: VE could promote health by lowering LDL-C, partly and indirectly by affecting gut bacteria with the ability to produce SCFAs or metabolize bile acids.<br><br>The clinical trial was registered on August 28, 2021. Registration number was ChiCTR2100050567 (https://www.chictr.org.cn).}, }
@article {pmid40086988, year = {2025}, author = {Peng, Q and Quan, L and Zheng, H and Li, J and Xie, G}, title = {Analyzing the contribution of top-down and bottom-up methods to the construction of synthetic microbial communities in Jiuyao.}, journal = {Food microbiology}, volume = {129}, number = {}, pages = {104759}, doi = {10.1016/j.fm.2025.104759}, pmid = {40086988}, issn = {1095-9998}, mesh = {Fermentation ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics ; Food Microbiology ; *Fermented Foods/microbiology/analysis ; *Microbiota ; *Fungi/classification/genetics/metabolism/isolation &amp; purification ; }, abstract = {The construction of synthetic microbial communities is a crucial strategy for improving the stability of microbial populations and the quality of fermented foods. Jiuyao, an essential saccharification and fermentation starter in Huangjiu production, was the focus of this study. Using metagenomics combined with culture-dependent methods, we identified 11 microbial species involved in Huangjiu fermentation. Through metagenomic analysis and simulated fermentation, Rhizopus delemar, Rhizopus microspores, Rhizopus stolonife, Rhizopus azygosporus, Saccharomycopsis fibuligera, Saccharomyces cerevisiae, Wickerhamomyces anomalus and Pediococcus pentosaceus were determined to be the core microbial species driving the Jiuyao fermentation process. A synthetic microbial community was constructed based on these species, successfully reproducing the flavor and sensory qualities of Huangjiu while enhancing fermentation efficiency. This study provides valuable insights into the functional roles of Jiuyao-associated microbes and offers a framework for improving microbial community stability and fermentation quality in Huangjiu production.}, }
@article {pmid40086981, year = {2025}, author = {Kothe, CI and Renault, P}, title = {Metagenomic driven isolation of poorly culturable species in food.}, journal = {Food microbiology}, volume = {129}, number = {}, pages = {104722}, doi = {10.1016/j.fm.2025.104722}, pmid = {40086981}, issn = {1095-9998}, mesh = {*Metagenomics/methods ; *Cheese/microbiology ; *Bacteria/isolation &amp; purification/genetics/classification/growth &amp; development ; *Food Microbiology ; Microbiota ; Metagenome ; Phylogeny ; }, abstract = {Although isolating microorganisms from food microbiota may appear less challenging than from the gut or environmental sources, recovering all representative species from food remains a difficult task. Here, we showed by metagenomic analysis that several abundant species had escaped isolation in a previous study of ten cheeses, including several previously uncharacterized species. This highlights the ongoing challenge of achieving a comprehensive recovery of microbes from food. To address this gap, we designed a novel strategy integrating metagenomics-based probes targeting the species of interest, coupled with an incremental culturing approach using pooled samples. As proof of concept, we applied this strategy to two cheeses containing species that were not isolated in our previous study, with the objective of isolating all species present at levels above 2% and, in particular, potential novel food species. Through this approach, we successfully performed the targeted isolation of two Psychrobacter and two Vibrio species from the first cheese, and four Halomonas and two Pseudoalteromonas species from the second one. Notably, P. undina and V. litoralis represented, as far as we know, the first cheese isolates characterized for these species. However, we were unable to isolate a novel species of Pseudoalteromonas, with no characterized representative to date, and Marinomonas foliarum, previously isolated from marine environment. Using metagenome-assembled genomes (MAGs) and metagenomic analysis, we discussed the possible reasons for their non-recovery. Finally, this strategy offers a promising approach for isolating a set of strains representative of the microbial diversity present in food ecosystems. These isolates can serve as a basis for investigating their roles in the communities, their impact on product development, safety implications and their potential in the development of starter cultures.}, }
@article {pmid40086705, year = {2025}, author = {Ma, G and Chai, Y and Tye, KD and Xie, H and Meng, L and Tang, X and Luo, H and Xiao, X}, title = {Predictive analysis of the impact of probiotic administration during pregnancy on the functional pathways of the gut microbiome in healthy infants based on 16S rRNA gene sequencing.}, journal = {Gene}, volume = {952}, number = {}, pages = {149414}, doi = {10.1016/j.gene.2025.149414}, pmid = {40086705}, issn = {1879-0038}, mesh = {Humans ; *Probiotics/administration &amp; dosage ; Female ; *Gastrointestinal Microbiome/genetics/drug effects ; Pregnancy ; *RNA, Ribosomal, 16S/genetics ; Infant, Newborn ; Adult ; Feces/microbiology ; Infant ; Male ; }, abstract = {Maternal probiotic supplementation altered the microbial composition in infants' gut, yet its effect on the functional pathways of the microbiota remains unclear. This study aimed to explore the potential impact of maternal probiotic intake on the predicted functional pathways of the gut microbiome in healthy infants. A total of 24 pregnant women were randomly allocated to either the control group or the probiotic group. The women in the probiotic group began receiving probiotics at the 32nd week of pregnancy and continued until delivery. Meconium and fecal samples were collected from infants at birth, as well as on the 3rd day, 14th day, and 6th month after birth. The functional characteristics of the microbial community were inferred using 16S rRNA gene analysis, processed with PICRUSt software, and cross-referenced with the KEGG database. The probiotic group had lower levels of Actinobacteria and Bacteroidetes, while Bifidobacterium growth was notably increased in the infant gut microbiota. At day 0 postpartum, the control group exhibited higher levels of Prevotellaceae compared to the probiotic group (P < 0.05). However, no significant differences were found by day 3. At day 14, the control group exhibited higher levels of Bacteroidaceae and Bacteroides, while Bacteroides_thetaiotaomicron was more abundant in the probiotic group (P < 0.05). By 6 months, the control group showed a higher abundance of Firmicutes (P < 0.05). On day 0 postpartum, maternal probiotic consumption increased the Environmental information processing pathway at KEGG Level 1, and increased Energy metabolism, Metabolism of cofactors and vitamins, and Cell growth and death pathways at KEGG Level 2. It also increased Histidine metabolism, One carbon pool by folate, and Folate biosynthesis at KEGG Level 3. No changes were observed in the infant gut microbiota's functional metabolic pathways at 3 days postpartum. At 14 days postpartum, probiotics reduced Lipid metabolism pathways at KEGG Level 2 and the Citrate cycle at KEGG Level 3. At 6 months postpartum, probiotics decreased Carbohydrate metabolism pathways at KEGG Level 2. Our findings suggest that probiotic supplementation during pregnancy affects the functional metabolism of the gut microbiota in healthy infants. This, in turn, may influence the development of the infant's immune system, metabolism, and overall health by modifying the gut microbial environment.}, }
@article {pmid40086585, year = {2025}, author = {Rawat, N and Sivanesan, S and Kanade, GS and Bafana, A}, title = {Interaction of environmental fluoride exposure and gut microbes: Potential implication in the development of fluorosis in human subjects.}, journal = {Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association}, volume = {200}, number = {}, pages = {115388}, doi = {10.1016/j.fct.2025.115388}, pmid = {40086585}, issn = {1873-6351}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Fluorides/toxicity ; Male ; Female ; *Fluorosis, Dental/microbiology/etiology ; *Environmental Exposure/adverse effects ; Adult ; Middle Aged ; Bacteria/classification/isolation &amp; purification/genetics/metabolism ; Fatty Acids, Volatile/metabolism ; Feces/microbiology ; }, abstract = {Fluoride exposure primarily occurs through contaminated water and leads to fluorosis, which is a global health concern. After ingestion, fluoride is absorbed via gastrointestinal tract, where it interacts with the gut microbiota. While animal studies have explored fluoride's effects on gut microbiota, no human studies have yet been conducted. Most research emphasizes metagenomic diversity, neglecting isolation and characterization of pure cultures for further applications. Additionally, the association between gut microbiota with fluorosis outcomes in fluoride-exposed populations is unexplored. This study characterizes and compares the cultivable gut microbiota in the fluoride-exposed population with (symptomatic, group II) or without (asymptomatic, group I) signs of skeletal fluorosis along with unexposed control (group III). Group I displayed higher abundance of Firmicutes (58.58 %), group II had predominance of Proteobacteria (61.25 %) while group III showed similar abundance of Proteobacteria (50.38 %) and Firmicutes (49.51 %). On analyzing short-chain fatty acid (SCFA) profiles, group I isolates produced higher isobutyric acid (1.31 ± 0.9 mM) than group II (0.71 ± 0.35 mM), while group II produced more isovaleric acid (0.8 ± 0.41 mM) than group I (0.61 ± 0.08 mM) (p < 0.05). These findings suggest that gut microbiota and SCFAs alteration may influence bone metabolism, affecting the fluorosis progression.}, }
@article {pmid40086306, year = {2025}, author = {Russo, A and D'Alessandro, A and Di Paola, M and Cerasuolo, B and Renzi, S and Meriggi, N and Conti, L and Costa, J and Pogni, R and Martellini, T and Cincinelli, A and Ugolini, A and Cavalieri, D}, title = {On the role of bacterial gut microbiota from supralittoral amphipod Talitrus saltator (Montagu, 1808) in bioplastic degradation.}, journal = {The Science of the total environment}, volume = {972}, number = {}, pages = {179109}, doi = {10.1016/j.scitotenv.2025.179109}, pmid = {40086306}, issn = {1879-1026}, mesh = {Animals ; *Amphipoda/microbiology ; *Gastrointestinal Microbiome ; *Plastics/metabolism ; *Water Pollutants, Chemical/metabolism ; Biodegradation, Environmental ; }, abstract = {Despite the promise of a reduced environmental impact, bioplastics are subjected to dispersion and accumulation similarly to traditional plastics, especially in marine and coastal environments. The environmental impact of bioplastics is attracting increasing attention due to the growing market demand. The ability of the supralittoral amphipod Talitrus saltator to ingest and survive on pristine starch-based bioplastic has already been assessed. However, the involvement of the gut microbiota of this key coastal species in making bioplastics a dietary supplement, remains unknown. In this study, we investigated the modification of T. saltator gut microbiota following bioplastic ingestion and the effect of this change on the modification of their chemical composition. Groups of adult amphipods were fed with: 1 - two different kinds of starch-based bioplastic; 2 - a 50 %/50 % chitosan-starch mixture; and 3 - paper and dry-fish-food. Freshly collected, unfed individuals were used as control group. Faecal pellets from the amphipods were collected and characterized using ATR-FTIR spectroscopy. DNA was extracted from gut samples for metagenomic analysis. Spectroscopic investigation suggested a partial digestion of polysaccharide components in the experimental polymeric materials. The analysis of the gut microbiota revealed that bioplastic feeding induced modification of sandhopper's gut microbial communities, shifting the abundance of specific microbial genera already present in the gut, towards bacterial genera associated with plastic/bioplastic degradation, especially in groups fed with starch-based bioplastics. Overall, our results highlight the involvement of T. saltator's gut microbiota in bioplastic modification, providing new insights into the potential role of microbial consortia associated to sandhoppers in bioplastic management.}, }
@article {pmid40086246, year = {2025}, author = {Han, NN and Yang, JH and Wu, GG and Yang, JH and Jin, JA and Fan, NS and Jin, RC}, title = {Differential size-dependent response patterns and antibiotic resistance development mechanism in anammox consortia.}, journal = {Journal of hazardous materials}, volume = {491}, number = {}, pages = {137886}, doi = {10.1016/j.jhazmat.2025.137886}, pmid = {40086246}, issn = {1873-3336}, mesh = {*Anti-Bacterial Agents/pharmacology ; *Sulfamethazine/pharmacology ; Sewage/microbiology ; *Drug Resistance, Microbial/genetics ; Oxidation-Reduction ; *Ammonia/metabolism ; Anaerobiosis ; Pseudomonas/genetics/drug effects/metabolism ; *Microbial Consortia ; }, abstract = {Antibiotic resistance is a global threat to human and animal health. Anaerobic ammonia oxidation (anammox) is an efficient and innovative wastewater treatment technology, which can be served as a promising approach to teat antibiotic wastewater. This study systematically investigated effects of sulfamethazine on the performance, microbial community dynamics and the resistome in anammox systems inoculated with different-sized granular sludge. The activity and performance of small (< 0.5 mm) anammox granules were more susceptible to sulfamethazine stress than those of medium (0.5-1.0 mm) and large (1.0-2.0 mm) granules. Sulfamethazine addition greatly increased the diversity and abundance of mobile genetic elements (MGEs) and antibiotic resistance genes (ARGs). Based on the metagenomic analysis, the horizontal transfer of ARGs in the anammox system was upregulated through bacterial oxidative stress, pili synthesis and type IV secretion system. In addition, two strains of sulfamethazine-resistant bacteria (Pseudomonas asiatica sp. nov. and Pseudomonas shirazica sp. nov.) were isolated from the anammox system. Their whole genome sequencing results showed that the most abundant plasmid was pkF7158B, which mediated the horizontal transfer of two main multidrug resistance genes (cpxR and mexB). This work provides a holistic insight into microbial heterogeneity of different-sized anammox granular sludge and their evolution and resistance development mechanism.}, }
@article {pmid40084893, year = {2025}, author = {Yuan, S and Wu, Y and Balcazar, JL and Wang, D and Zhu, D and Ye, M and Sun, M and Hu, F}, title = {Expanding the potential soil carbon sink: unraveling carbon sequestration accessory genes in vermicompost phages.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {4}, pages = {e0029625}, pmid = {40084893}, issn = {1098-5336}, support = {42277115, 42177113, 42277418//National Natural Science Foundation of China/ ; Modern Agriculture BE2022322//Key P&amp;D Project of Jiangshu Province/ ; 2024M761435//China Postdoctoral Science Foundation/ ; }, mesh = {*Bacteriophages/genetics/metabolism ; *Soil Microbiology ; Composting ; Manure/microbiology ; *Carbon Sequestration ; *Soil/chemistry ; Swine ; *Bacteria/metabolism/genetics/virology ; Animals ; *Microbiota ; Carbon/metabolism ; }, abstract = {The compost microbiome is important in regulating soil carbon sequestration. However, there is limited information concerning phage communities and phage-encoded auxiliary metabolic genes (AMGs) in compost-applied soils. We combined metagenomics and meta-viromes to explore the potential role of bacterial and phage communities in carbon sequestration in the compost microbiome. The experiment comprised swine manure compost (SW) and vermicompost (VE) applied to the soil along with a control treatment (CK). The bacterial community richness decreased after swine manure application and increased after vermicomposting compared to the control treatment. The phage community in the vermicompost-applied soil was dominated (63.1%) by temperate phages. In comparison, the communities of the swine manure compost-applied soil (92.7%) and control treatments (75.4%) were dominated by virulent phages. Phage-encoded carbon sequestration AMGs were detected in all three treatments, with significant enrichment in the vermicompost-applied soil. The average carbon sequestration potential (the coverage ratio of phage AMGs:total genes) of phage AMGs (aceF, GT11, and GT6) in the vermicompost-applied soil (65.18%) was greater than in the swine manure-applied (0) and control soils (50.21%). The results highlight the role of phage-encoded AMGs in improving soil carbon sequestration in vermicompost-applied soil. The findings provide new avenues for increasing soil carbon sequestration.IMPORTANCEThe phage-bacteria interactions have a significant impact on the global carbon cycle. Soil microbial carbon sequestration is a process in combination withcarbon sequestration genes and growth activity. This is the first study aimed at understanding the carbon sequestration potential of phage communities in vermicompost. The results of this study provide variations in carbon sequestration genes in vermicompost microbial communities, and some novel phage auxiliary metabolic genes were revealed to assist bacterial communities to increase soil carbon sequestration potential. Our results highlight the importance of phages in soil carbon sequestration from the perspective of phage-bacterial community interactions.}, }
@article {pmid40083550, year = {2025}, author = {Ng, HY and Liao, Y and Cheung, CL and Zhang, R and Chan, KH and Seto, WK and Leung, WK and Hung, IFN and Lam, TTY and Cheung, KS}, title = {Gut microbiota is associated with persistence of longer-term BNT162b2 vaccine immunogenicity.}, journal = {Frontiers in immunology}, volume = {16}, number = {}, pages = {1534787}, pmid = {40083550}, issn = {1664-3224}, mesh = {Humans ; *Gastrointestinal Microbiome/immunology ; Male ; Female ; Middle Aged ; *SARS-CoV-2/immunology ; Adult ; *BNT162 Vaccine/immunology ; Antibodies, Viral/blood/immunology ; *Immunogenicity, Vaccine ; *COVID-19/immunology/prevention &amp; control ; Antibodies, Neutralizing/blood/immunology ; Prospective Studies ; *COVID-19 Vaccines/immunology ; Hong Kong ; }, abstract = {INTRODUCTION: BNT162b2 immunogenicity wanes with time and we investigated association between gut microbiota and longer-term immunogenicity.<br><br>METHODS: This cohort study prospectively recruited adult BNT162b2 two-dose recipients from three vaccination centers in Hong Kong. Blood samples were collected at baseline and day 180 after first dose, and tested for neutralizing antibodies (NAb) against receptor-binding domain (RBD) of wild type SARS-CoV-2 virus using chemiluminescence immunoassay. Shotgun DNA metagenomic sequencing was performed to characterize baseline stool microbiome. Baseline metabolites were measured by gas and liquid chromatography-tandem mass spectrometry (GC-MS/MS and LC-MS/MS). Primary outcome was persistent high NAb response (defined as top 25% of NAb level) at day 180. Putative bacterial species and metabolic pathways were identified using linear discriminant analysis [LDA] effect size analysis. Multivariable logistic regression adjusting for clinical factors was used to derive adjusted odds ratio (aOR) of outcome with bacterial species and metabolites.<br><br>RESULTS: Of 242 subjects (median age: 50.2 years [IQR:42.5-55.6]; male:85 [35.1%]), 61 (25.2%) were high-responders while 33 (13.6%) were extreme-high responders (defined as NAb&#x2265;200AU/mL). None had COVID-19 at end of study. Ruminococcus bicirculans (log10LDA score=3.65), Parasutterella excrementihominis (score=2.82) and Streptococcus salivarius (score=2.31) were enriched in high-responders, while Bacteroides thetaiotaomicron was enriched in low-responders (score=-3.70). On multivariable analysis, bacterial species (R. bicirculans-aOR: 1.87, 95% CI: 1.02-3.51; P. excrementihominis-aOR: 2.2, 95% CI: 1.18-4.18; S. salivarius-aOR: 2.09, 95% CI: 1.13-3.94) but not clinical factors associated with high response. R. bicirculans positively correlated with most metabolic pathways enriched in high-responders, including superpathway of L-cysteine biosynthesis (score=2.25) and L-isoleucine biosynthesis I pathway (score=2.16) known to benefit immune system. Baseline serum butyrate (aOR:10.00, 95% CI:1.81-107.2) and isoleucine (aOR:1.17, 95% CI:1.04-1.35) significantly associated with extreme-high vaccine response.<br><br>CONCLUSION: Certain gut bacterial species, metabolic pathways and metabolites associate with longer-term COVID-19 vaccine immunogenicity.}, }
@article {pmid40082612, year = {2025}, author = {Đokić, J and Dinić, M and Soković Bajić, S and Bisenić, A and Mitrović, H and Jakovljević, S and Radojević, D and Brdarić, E and Lukić, J and Živković, M and Tolinački, M and Terzić-Vidojević, A and Golić, N}, title = {High-throughput workflow for cultivation and characterization of gut microbiota strains with anti-inflammatory properties and metabolite signature associated with gut-brain communication.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {8741}, pmid = {40082612}, issn = {2045-2322}, support = {Grant IDEAS No. 7744507, NextGenBiotics//Science Fund of the Republic of Serbia/ ; Grant No. 451-03-66/2024-03/200042//Ministry of Science, Technological Development and Innovations of the Republic of Serbia/ ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; *Brain/metabolism ; Workflow ; *Anti-Inflammatory Agents/metabolism ; Probiotics ; *Bacteria/genetics/metabolism/growth &amp; development ; }, abstract = {The gut microbiota is deeply interconnected with the brain, a phenomenon often referred to as the gut-brain axis. Dysfunction in the microbiota-gut-brain axis can cause various neurological and psychiatric disorders associated with chronic inflammation and gut microbiota dysbiosis. Therefore, cultivation of anaerobic human gut microbiota strains, and characterization of their safety status and immunomodulatory potential could contribute to deciphering the molecular mechanisms underlying the microbiota-gut-brain communication and revealed their biotherapeutic potential. However, poor cultivability of gut microbiota members, makes research into their physiological role challenging. Hence, we report a high-throughput workflow based on targeted cultivation linked to metagenome sequencing, combined with the bioinformatic search for gut members with anti-inflammatory properties which produce the most important microbial metabolites that affect brain function. With this approach, we isolated 147 bacterial strains, and 41 were characterized for their immunomodulatory status with 12 strains showing immunosuppressive features with ability of producing brain important metabolites. Through this workflow we established the best growing conditions essential for cultivation, archiving, phenotyping, and characterization of anaerobic gut bacteria important for microbiota-gut-brain-axis research, and characterized the safety and probiotic potential of 7 extremely oxygen-sensitive strains.}, }
@article {pmid40082024, year = {2025}, author = {Yin, F and Ge, T and Zalucki, MP and Xiao, Y and Peng, Z and Li, Z}, title = {Gut symbionts affect Plutella xylostella (L.) susceptibility to chlorantraniliprole.}, journal = {Pesticide biochemistry and physiology}, volume = {209}, number = {}, pages = {106327}, doi = {10.1016/j.pestbp.2025.106327}, pmid = {40082024}, issn = {1095-9939}, mesh = {Animals ; *ortho-Aminobenzoates/pharmacology ; *Insecticides/pharmacology ; *Gastrointestinal Microbiome/drug effects ; *Symbiosis ; Insecticide Resistance/genetics ; *Moths/microbiology/drug effects ; Larva/drug effects/microbiology ; }, abstract = {Plutella xylostella, a globally economically important pest of cruciferous crops, has varying degrees of resistance to almost all insecticides. Insect gut microbiotas have a variety of physiological functions, and recent studies have shown that they have some potential connection with insecticide resistance. Here, we use metagenomics to analyze the differences in gut microbiota among 5 different populations of P. xylostella resistant to chlorantraniliprole. Differential gene expression was enriched in various metabolic pathways including carbohydrate metabolism, amino acid metabolism, energy metabolism, metabolism of cofactors and vitamins, nucleotide metabolism and so on. Proteobacteria was the dominate phyla, and the relative abundance of common dominant genera in the treated group (CL, Bt, and BtCL) was higher than that in susceptible controls. We successfully isolated 15 species of bacteria, in which the Enterobacter hormaechei was associated with enhanced insecticide resistance. The population we isolated can metabolize chlorantraniliprole in vitro, with a metabolic rate of 34.8 % within 4 days. Our work advances understanding of the evolution of insecticide resistance and lays a foundation for the further exploration of symbiotic microbial associations of lepidopteran insects and their ecological consequences.}, }
@article {pmid40082000, year = {2025}, author = {Massaro, CA and Meade, S and Lemarié, FL and Kaur, G and Bressler, B and Rosenfeld, G and Leung, Y and Williams, AJ and Lunken, G}, title = {Gut microbiome predictors of advanced therapy response in Crohn's disease: protocol for the OPTIMIST prospective, longitudinal, observational pilot study in Canada.}, journal = {BMJ open}, volume = {15}, number = {3}, pages = {e094280}, pmid = {40082000}, issn = {2044-6055}, mesh = {Female ; Humans ; Male ; British Columbia ; Canada ; *Crohn Disease/microbiology/therapy/drug therapy ; Cross-Sectional Studies ; Feces/microbiology ; *Gastrointestinal Microbiome ; Intestinal Mucosa/microbiology ; Longitudinal Studies ; Pilot Projects ; Prospective Studies ; }, abstract = {INTRODUCTION: Inflammatory bowel disease (IBD), including Crohn's disease (CD) and ulcerative colitis, is characterised by chronic and relapsing inflammation of the gastrointestinal tract, leading to significant morbidity and reduced quality of life. The global rise in IBD incidence is driven by a complex interplay of genetic, environmental, dietary and microbiome-related factors. Despite advancements in treatment, such as biologics, response rates remain variable, highlighting the need for personalised approaches. Recent research suggests that specific microbiome signatures may serve as biomarkers for predicting therapeutic efficacy, offering a potential tool for optimising treatment strategies in CD. The aim of the Optimising IBD Patient Treatment with Integrated Microbiome Investigation for Specialised Therapeutics (OPTIMIST) study is to evaluate microbiome profiles across various sample types in a Canadian CD cohort starting or already on advanced therapy, with the goal of developing predictive models for personalised therapeutics.<br><br>METHODS AND ANALYSIS: This study is a two-phase, longitudinal, prospective observational pilot study conducted in British Columbia, Canada, involving both CD patients and non-IBD controls. Phase 1 focuses on baseline microbiome differences across participant cohorts through cross-sectional analysis. Phase 2 follows participants over 12 months to assess microbiome changes and their association with treatment response. Stool samples, intestinal biopsies from the left colon, right colon and ileum, as well as mucosal wash samples from the proximal part of the distal colon, will undergo metagenomics, metaproteomics and metabolomics analyses to explore compositional and functional differences. Data will be analysed using alpha and beta diversity metrics, differential abundance analyses and multivariate analyses to identify microbiome-based predictors of therapeutic response.<br><br>ETHICS AND DISSEMINATION: Ethical approval was received by the Research Ethics Board (REB) of University of British Columbia-Providence Healthcare (UBC-PHC) with a REB number H23-02927. All amendments to the protocol are reported and adapted based on the requirements of the REB. The results of this study will be submitted to peer-reviewed journals and will be communicated in editorials/articles by the IBD Centre of BC and BC Children's Hospital Research Institute.<br><br>TRIAL REGISTRATION NUMBER: NCT06453720.<br><br>PROTOCOL VERSION: 2024-06-21, version 3.0.}, }
@article {pmid40081757, year = {2025}, author = {Armengaud, J}, title = {The dawn of the revolution that will allow us to precisely describe how microbiomes function.}, journal = {Journal of proteomics}, volume = {316}, number = {}, pages = {105430}, doi = {10.1016/j.jprot.2025.105430}, pmid = {40081757}, issn = {1876-7737}, mesh = {Humans ; *Proteomics/methods ; *Microbiota/physiology ; Metabolomics/methods ; *Metagenomics/methods ; *Gastrointestinal Microbiome/physiology ; }, abstract = {The community of microorganisms inhabiting a specific environment, such as the human gut - including bacteria, fungi, archaea, viruses, protozoa, and others - is known as the microbiota. A holobiont, in turn, refers to an integrated ecological unit where microbial communities function and interact with their host, thus is a more integrative concept. To understand the processes involved, the diversity of microorganisms present must be identified and their molecular components quantified, especially proteins. Indeed, proteins - through their roles as catalytic units, structural components, and signaling molecules - are the main drivers of biological processes. Metagenomics has significantly expanded what we know about the genetic material present in microbiota, revealing their functional potential; metabolomics delivers an overall snapshot of the metabolites produced by the community. But metaproteomics offers a complementary approach to explore microbiome and holobiont functionality by focusing on the active proteins and functional pathways from each taxon. Significant recent advances in high-resolution tandem mass spectrometry have greatly expanded the catalog of peptide sequences accessible in each sample, creating the conditions for unprecedented taxonomical profiling, while also providing more accurate biomass quantification, more detailed protein characterization, and a greater capacity to monitor abundance and distinguish host biomarkers. By integrating artificial intelligence into the metaproteomics pipeline, extended datasets can now be efficiently mined to gain a more comprehensive functional view of complex biological systems, paving the way for next-generation metaproteomics. In this perspective, I discuss the transformative potential of this methodology. We are on the cusp of a remarkable omic revolution that promises to uncover the intricate workings of microbiomes by producing a vast array of new knowledge with multiple applications. SIGNIFICANCE: Metaproteomics provides a powerful lens to investigate microbiome and holobiont functionality by identifying and quantifying active proteins and functional pathways within each taxon. Recent breakthroughs in high-resolution tandem mass spectrometry have dramatically expanded the repertoire of peptide sequences detectable per sample. This progress enables unprecedented taxonomic resolution for microbial identification, more precise biomass quantification, comprehensive protein characterization, abundance monitoring, and the unique identification of host biomarkers. In this commentary, I delve into the distinctive features that make metaproteomics a transformative tool. I discuss the recent advancements in tandem mass spectrometry and argue that the primary challenge in analyzing complex samples is shifting from data acquisition to data interpretation. With the integration of artificial intelligence, I believe next-generation metaproteomics is poised to become the next Big Thing in microbiome research, unlocking profound insights into microbial functionality and ecosystem dynamics.}, }
@article {pmid40081368, year = {2025}, author = {Dai, R and Zhang, J and Liu, F and Xu, H and Qian, JM and Cheskis, S and Liu, W and Wang, B and Zhu, H and Pronk, LJU and Medema, MH and de Jonge, R and Pieterse, CMJ and Levy, A and Schlaeppi, K and Bai, Y}, title = {Crop root bacterial and viral genomes reveal unexplored species and microbiome patterns.}, journal = {Cell}, volume = {188}, number = {9}, pages = {2521-2539.e22}, doi = {10.1016/j.cell.2025.02.013}, pmid = {40081368}, issn = {1097-4172}, mesh = {*Plant Roots/microbiology/virology ; *Genome, Viral/genetics ; *Microbiota/genetics ; *Crops, Agricultural/microbiology/virology ; *Bacteria/genetics/classification ; Phylogeny ; *Genome, Bacterial/genetics ; Soil Microbiology ; Metagenomics ; Zea mays/microbiology/virology ; Oryza/microbiology/virology ; Metagenome ; Triticum/microbiology/virology ; }, abstract = {Reference genomes of root microbes are essential for metagenomic analyses and mechanistic studies of crop root microbiomes. By combining high-throughput bacterial cultivation with metagenomic sequencing, we constructed comprehensive bacterial and viral genome collections from the roots of wheat, rice, maize, and Medicago. The crop root bacterial genome collection (CRBC) significantly expands the quantity and phylogenetic diversity of publicly available crop root bacterial genomes, with 6,699 bacterial genomes (68.9% from isolates) and 1,817 undefined species, expanding crop root bacterial diversity by 290.6%. The crop root viral genome collection (CRVC) contains 9,736 non-redundant viral genomes, with 1,572 previously unreported genus-level clusters in crop root microbiomes. From these, we identified conserved bacterial functions enriched in root microbiomes across soils and host species and uncovered previously unexplored bacteria-virus connections in crop root ecosystems. Together, the CRBC and CRVC serve as valuable resources for investigating microbial mechanisms and applications, supporting sustainable agriculture.}, }
@article {pmid40077957, year = {2025}, author = {Ma, Z and Wen, X and Zhang, Y and Ai, Z and Zhao, X and Dong, N and Dou, X and Shan, A}, title = {Thymol Alleviates Colitis by Modulating Intestinal Barrier Damage, Gut Microbiota, and Amino Acid Metabolic Pathways.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {12}, pages = {7211-7227}, doi = {10.1021/acs.jafc.4c10406}, pmid = {40077957}, issn = {1520-5118}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Colitis/microbiology/drug therapy/metabolism/genetics ; *Thymol/administration &amp; dosage ; *Amino Acids/metabolism ; Male ; Mice, Inbred C57BL ; *Intestinal Mucosa/metabolism/drug effects/microbiology ; Humans ; Bacteria/genetics/classification/isolation &amp; purification/metabolism/drug effects ; Metabolic Networks and Pathways/drug effects ; Colon/metabolism/drug effects/microbiology ; Dextran Sulfate/adverse effects ; Cytokines/genetics/metabolism ; }, abstract = {Thymol (THY) is a phenolic monoterpene compound that has garnered attention due to its various biological properties, including antioxidant, anti-inflammatory, and immune-regulatory effects. The purpose of this study was to determine the therapeutic and protective effects of THY in colitic mice, with a particular focus on the mechanisms involving gut microbiota. The results showed that early intervention with THY (40 and 80 mg/kg) not only alleviated the clinical symptoms and colonic damage in mice with dextran sodium sulfate (DSS)-induced colitis but also suppressed the colonic production of inflammatory cytokines (IL-1β, IL-6, and IL-18) and enhanced the expression of mucins (MUC1 and MUC2) and trefoil factor family 3 (TFF3), thereby improving the integrity of the intestinal epithelial barrier. In addition, THY altered the composition of the gut microbiota in colitis mice by increasing the abundance of Bacteroides and reducing the abundance of Proteobacteria. Fecal microbial transplantation (FMT) results demonstrated that FM from THY donor mice significantly improved symptoms of inflammatory bowel disease (IBD), confirming the crucial role of the gut microbiota. Metagenomic and untargeted metabolomic studies found that the characteristic microbiota of THY is Prevotellaceae, and THY significantly upregulated the amino acid metabolic pathways related to arginine and proline metabolism, arginine biosynthesis, and glycerophospholipid metabolism. In summary, THY holds significant potential as a functional additive to enhance host intestinal activity.}, }
@article {pmid40077671, year = {2025}, author = {Gao, Y and Borjihan, Q and Zhang, W and Li, L and Wang, D and Bai, L and Zhu, S and Chen, Y}, title = {Complex Probiotics Ameliorate Fecal Microbiota Transplantation-Induced IBS in Mice via Gut Microbiota and Metabolite Modulation.}, journal = {Nutrients}, volume = {17}, number = {5}, pages = {}, pmid = {40077671}, issn = {2072-6643}, support = {2022-Science and Technology Xing Meng-Quality improvement-02//the Science and Technology Xing Meng action focus project of Inner Mongolia Autonomous Region/ ; }, mesh = {Animals ; *Probiotics/pharmacology ; *Gastrointestinal Microbiome/drug effects ; *Fecal Microbiota Transplantation/adverse effects ; *Irritable Bowel Syndrome/therapy/microbiology/etiology/metabolism ; Mice ; Disease Models, Animal ; Feces/microbiology/chemistry ; Male ; Mice, Inbred C57BL ; Serotonin/metabolism ; Serotonin Plasma Membrane Transport Proteins/metabolism ; Tryptophan/metabolism ; Metabolomics ; Dysbiosis ; Metagenomics ; }, abstract = {Background/Objectives: Irritable bowel syndrome (IBS) is a highly prevalent functional gastrointestinal disorder. Emerging evidence implicates gut microbiota dysbiosis in IBS pathogenesis, and probiotic interventions targeting microbial modulation hold therapeutic promise. Methods: this study used fecal microbiota transplantation to establish a mouse model of IBS before evaluating the effects of the complex probiotic by using metagenomics and targeted metabolomics to explore the potential mechanism. Results: After 14 days, the probiotic relieved constipation, reduced inflammation and intestinal permeability, lowered 5-HT levels and increased serotonin transporter (SERT) expression in tissues. Metagenomic analysis showed a reduced inflammation-related species abundance. It also decreased fecal butyric acid, acetic acid and tryptophan levels in IBS mice. Conclusions: The probiotic complex effectively alleviated IBS symptoms in mice by modulating gut microbiota and fecal metabolites, providing insights for future IBS research and treatment.}, }
@article {pmid40076957, year = {2025}, author = {Kumagai, K and Ishikawa, S and Iino, M and Edamatsu, K and Okuyama, N and Yusa, K and Shimizu, Y and Aoki, R and Masuda, C and Ohashi, Y and Horie, A and Hoshi, K and Hamada, Y}, title = {Characterization of Salivary Microbiota in Japanese Patients with Oral Cancer.}, journal = {International journal of molecular sciences}, volume = {26}, number = {5}, pages = {}, pmid = {40076957}, issn = {1422-0067}, support = {JP 22K10113//JSPS KAKENHI Grant-in-Aid for Scientific Research (C)/ ; }, mesh = {Humans ; *Mouth Neoplasms/microbiology ; *Saliva/microbiology ; Female ; *Microbiota/genetics ; Male ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; Aged ; Japan ; *Bacteria/genetics/classification/isolation &amp; purification ; Case-Control Studies ; Adult ; Metagenomics/methods ; East Asian People ; }, abstract = {This study aimed to characterize salivary microbiota in patients with oral cancer using 16S rRNA amplicon sequencing. DNA was extracted from saliva samples of 23 patients with oral cancer and 95 age-matched controls. A metagenomic analysis was performed using 16S rRNA amplicon sequencing. Patients with oral cancer exhibited lower α-diversity, as indicated by the Chao-1 index, compared to the control group, and significant differences in β-diversity were observed between the two groups. At the genus level, 25 bacterial species such as Lautropia, Megasphaera, Lactobacillus, Kingella, Gemella, Staphylococcus, and Propionibacterium were identified in patients with oral cancer, with more than half being Gram-positive facultative anaerobes or anaerobes. The reduced bacterial diversity in saliva of patients with oral cancer suggests dysbiosis during oral carcinogenesis may contribute to changes in bacterial distribution within the oral cavity.}, }
@article {pmid40076252, year = {2025}, author = {Gao, Y and Xu, Y and Dong, Z and Guo, Y and Luo, J and Wang, F and Yan, L and Zou, X}, title = {Endophytic Fungal Diversity and Its Interaction Mechanism with Medicinal Plants.}, journal = {Molecules (Basel, Switzerland)}, volume = {30}, number = {5}, pages = {}, pmid = {40076252}, issn = {1420-3049}, support = {BS0050//Heilongjiang Province Postdoctoral Research Fund/ ; LH2022H001//Heilongjiang Natural Science Foundation Joint Guidance Project/ ; ZYW2023-073//Heilongjiang Province Traditional Chinese Medicine Research Project/ ; GZ20210110//Key Research and Development Guidance Project of Heilongjiang Province/ ; }, mesh = {*Plants, Medicinal/microbiology ; *Endophytes/metabolism/genetics/physiology ; *Fungi/metabolism/genetics/classification/physiology ; *Biodiversity ; Metabolomics ; Proteomics ; Metagenomics ; }, abstract = {This paper reviewed the diversity of endophytic fungi and their interactions with medicinal plants, along with the research methodologies utilized to investigate these interactions. It mainly includes the diversity of endophytic fungi, as well as distribution diversity, species diversity, and the diversity of their metabolites and functions, including antibacterial, anti-inflammatory, anti-tumor, insecticidal, antioxidant capabilities, and so on. The research methodologies employed to investigate the interactions between endophytic fungi and medicinal plants are categorized into metagenomics, transcriptomics, metatranscriptomics, proteomics, and metabolomics. Furthermore, this study anticipates the potential applications of secondary metabolites derived from endophytic fungi in both medicine and agriculture.}, }
@article {pmid40075266, year = {2025}, author = {Cao, H and Xu, J and Wang, H and Yi, W and Yang, D and Yang, J and Sun, J and Wang, Y and Zhang, F and Yan, J and Li, D}, title = {Fecal microbiota transplantation mitigates postdieting weight regain in mice by modulating the gut-liver axis.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {135}, pmid = {40075266}, issn = {1471-2180}, support = {2023YFF1104305//National Key Research and Development Program of China/ ; 2022YFF1100601//National Key Research and Development Program of China/ ; K2023004//Key Research project of Health Commission of Jiangsu Province/ ; M2021055//Key Research project of Health Commission of Jiangsu Province/ ; Y2021001//Wuxi Science and Technology Bureau, "Taihu Light" Science and Technology Research program/ ; K20221026//Wuxi Science and Technology Bureau, "Taihu Light" Science and Technology Research program/ ; CXTD2021003//Key discipline construction program of Wuxi Commission of Health/ ; KX-23-B050//Soft Science Project of Wuxi Science and Technology Association/ ; KX-23-C196//Soft Science Project of Wuxi Science and Technology Association/ ; YJZ202305//Medical research projects in research-oriented hospitals of Affiliated Hospital of Jiangnan University/ ; HB2023062//"Shuangbai Talents" research program of Wuxi Commission of Health/ ; HB2023063//"Shuangbai Talents" research program of Wuxi Commission of Health/ ; HB2023061//"Shuangbai Talents" research program of Wuxi Commission of Health/ ; LCYJ202347//Clinical Research and translational medicine research program of Affiliated Hospital of Jiangnan University/ ; LCYJ202310//Clinical Research and translational medicine research program of Affiliated Hospital of Jiangnan University/ ; LCYJ202322//Clinical Research and translational medicine research program of Affiliated Hospital of Jiangnan University/ ; LCYJ202303//Clinical Research and translational medicine research program of Affiliated Hospital of Jiangnan University/ ; BK20210468//Natural Science Foundation of Jiangsu Province/ ; BK20210060//Natural Science Foundation of Jiangsu Province/ ; 82370809//National Natural Science Foundation of China/ ; 32101033//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Fecal Microbiota Transplantation ; Mice ; *Gastrointestinal Microbiome ; *Weight Gain ; *Liver/metabolism ; Male ; Mice, Inbred C57BL ; Bacteria/classification/genetics/isolation &amp; purification ; Dysbiosis/therapy ; Lipid Metabolism ; Fatty Acids, Volatile/blood ; }, abstract = {BACKGROUND: Dysbiosis of the microbiome is strongly associated with weight rebound after dieting. However, the interactions between the host and microbiome and their relevance to the pathogenesis of post-diet weight rebound remain unclear.<br><br>PURPOSE: This study aimed to evaluate the effects of fecal microbiota transplantation (FMT) on post-diet weight regain and to investigate the underlying mechanisms by which FMT inhibits weight regain.<br><br>METHODS: FMT was administered once daily to mice for 5 weeks. Gas chromatography tandem mass spectrometry was employed to analyze short-chain fatty acid levels in serum, ultrahigh-performance liquid chromatography tandem mass spectrometry was utilized for analyzing hepatic lipid metabolites, and shotgun metagenomic sequencing was applied to examine the intestinal microbiome.<br><br>RESULTS: FMT reduced weight regain and prevented lipid accumulation in both liver and adipose tissue while also improving glucose intolerance in mice. Furthermore, FMT increased the abundance of Enterorhabdus caecimuris and decreased the abundances of Burkholderiales, Sutterellaceae, Turicimonas muris, Bacteroides stercorirosoris, and Acetivibrio ethanolgignens within the gut microbiota. Additionally, elevated propionic acid levels and significant alterations in hepatic lipid metabolites were observed following FMT administration.<br><br>CONCLUSIONS: Our findings demonstrate that FMT effectively mitigates post-diet weight regain and associated complications. These effects are mediated through interactions between the gut microbiota and the liver via the gut-propionic acid-liver axis.<br><br>CLINICAL TRIAL NUMBER: Not applicable.}, }
@article {pmid40075219, year = {2025}, author = {Sun, Y and Huang, S and Li, M and Yang, Y and Ma, J and Xie, R and Wang, J and Zhao, Q and Qin, S and He, L and Jiang, J and Zhao, Q and Jin, G and Liu, X and Huang, H and Yang, Y and Wei, J and Liu, W and Wang, B and Yang, R and Su, X and Cao, H}, title = {Maternal high-fat diet disrupts intestinal mucus barrier of offspring by regulating gut immune receptor LRRC19.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {420}, pmid = {40075219}, issn = {2399-3642}, support = {82270574//National Natural Science Foundation of China (National Science Foundation of China)/ ; 82070545//National Natural Science Foundation of China (National Science Foundation of China)/ ; 82400632//National Natural Science Foundation of China (National Science Foundation of China)/ ; 81970488//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Female ; *Diet, High-Fat/adverse effects ; Mice ; *Intestinal Mucosa/metabolism/immunology ; Pregnancy ; Mice, Inbred C57BL ; Indoleacetic Acids/metabolism ; Mice, Knockout ; Interleukin-22 ; Male ; Receptors, Aryl Hydrocarbon/metabolism ; Interleukins/metabolism ; *Prenatal Exposure Delayed Effects ; *Mucus/metabolism ; }, abstract = {Maternal high fat diet (MHFD) increased colitis susceptibility in adulthood. However, the mechanism remains unclear. We sought to explore whether novel gut immune receptor leucine-rich repeat C19 (LRRC19) contributed to the impaired mucus barrier of offspring exposed to MHFD via gut immune response and microbiota. The results showed that MHFD significantly impaired the intestinal mucus barrier of offspring, and up-regulated the expression of LRRC19. Lrrc19 deletion alleviated the mucus barrier disruption. Mechanistically, metagenome sequencing revealed that the MHFD-induced gut microbiota alteration was partly restored in Lrrc19[-/-] offspring. Muc2-associated bacteria were decreased in the MHFD group, such as Akkermansia_muciniphila_CAG_154, which increased in the Lrrc19-deficient offspring. Moreover, Lrrc19[-/-] offspring had a higher rate of indole-3-acetic acid (IAA)-producing bacterium, such as Lactobacillus reuteri. A targeted metabolomics analysis revealed that IAA emerged as the top candidate that might mediate the protective effects. IAA was found to improve the mucus barrier function by increasing the ratio of interleukin-22 (IL-22)[+] ILC3 cells in an aryl hydrocarbon receptor (AhR)-dependent manner. These results suggest that MHFD disrupts the intestinal mucus barrier of offspring through regulating gut immune receptor LRRC19 and inducing an imbalance of gut microbiota and microbiota-derived metabolites.}, }
@article {pmid40072675, year = {2025}, author = {Verma, N and Chavan, N and Aulakh, KS and Sharma, A and Shouche, Y and Ramana, VV}, title = {Temporal Dynamics of Microbial Community Composition and Antimicrobial Resistance in a Mass Gathering Setting Using Culturomics and Metagenomic Approaches.}, journal = {Journal of epidemiology and global health}, volume = {15}, number = {1}, pages = {41}, pmid = {40072675}, issn = {2210-6014}, support = {OLP-805//CSIR - Institute of Microbial Technology/ ; GAP-233//Department of Biotechnology, Ministry of Science and Technology, India/ ; }, mesh = {India ; Metagenomics ; Humans ; *Water Microbiology ; *Microbiota ; *Drug Resistance, Bacterial ; Anti-Bacterial Agents/pharmacology ; *Bacteria/drug effects/genetics ; *Drug Resistance, Microbial ; }, abstract = {INTRODUCTION: Antimicrobial resistance (AMR) is one of the major global concerns in the current scenario. Mass-gathering events in fast-developing and densely populated areas may contribute to antibiotic resistance. Despite meticulous planning and infrastructure development, the effect of mass gatherings on microbial ecosystems and antibiotic resistance must be investigated. This study used culture and metagenome-based methods to investigate and compare the bacterial diversity, AMR profile &amp; mechanism of resistance for bacteria in water samples collected from the mass gathering event (2019 Prayagraj Kumbh Mela in Uttar Pradesh, India) with the control samples, collected during no mass gathering.<br><br>METHODS: This study analyzed the water samples collected from a mass gathering event held in February 2019. Water samples collected in this study were grouped into "Test" (mass gathering event) and "Control" (no mass gathering event) groups. This study involved methods including culturomics, antibiotyping, phenotypic &amp; genotypic identification methods, and metagenomics.<br><br>RESULTS: There is a significant variation observed in the evenness and richness of bacterial diversity and MDR profile, expressed in terms of the relative abundance of the bacterial species between test and control samples. Out of the total multi-drug resistant (MDR) strains identified in the Prayagraj sample, the majority were derived from the test sample. A pathway-based analysis of MDR strains revealed the highest levels of acquired resistance were related to the inhibition of cell wall synthesis primarily in Pseudomonas spp., followed by resistance to protein synthesis and nucleic acid synthesis pathways. Additionally, the overall resistance profile of the test sample demonstrated a significantly elevated resistome for beta-lactams, particularly in the Pseudomonas spp. Additionally, several ESBL (Extended-spectrum beta-lactamase)-associated gene variants were identified. The test sample showed a two-fold increase in the prevalence and diversity of common beta-lactam gene variants in addition to the presence of unique variants. Using the metagenomics approach, we investigated the mechanism of antibiotic resistance, and it revealed a dominant trend in antibiotic efflux and inactivation pathways within both the test and control samples. Overall, the bacterial diversity, abundance (including AMR strains of human origin), and ARGs were relatively higher in the Test sample compared to the control sample which was collected 3 months after the mass gathering event.<br><br>CONCLUSION: Our study found significant variations in microbial communities, MDR strains, and ARGs due to environmental and human influences. Pseudomonas spp. was the most abundant MDR strain, primarily resistant to cell wall synthesis inhibitors. The test sample showed an increased resistome for beta-lactams, while the control sample had reduced bacterial species, ARGs, and MDR strains linked to human microflora. This shift could be due to the re-establishment of native bacterial communities in the Ganges River which may be attributed to its bacteriophage activity, biomolecules, and inherent antimicrobial properties. The study highlights the need for surveillance, monitoring AMR emergence to develop new strategies to combat it.}, }
@article {pmid40072088, year = {2025}, author = {Świdnicka-Siergiejko, A and Daniluk, J and Miniewska, K and Daniluk, U and Guzińska-Ustymowicz, K and Pryczynicz, A and Dąbrowska, M and Rusak, M and Ciborowski, M and Dąbrowski, A}, title = {Inflammatory Stimuli and Fecal Microbiota Transplantation Accelerate Pancreatic Carcinogenesis in Transgenic Mice, Accompanied by Changes in the Microbiota Composition.}, journal = {Cells}, volume = {14}, number = {5}, pages = {}, pmid = {40072088}, issn = {2073-4409}, support = {No NCN 2017/27/B/NZ5/02904//National Science Center/ ; }, mesh = {Animals ; *Fecal Microbiota Transplantation/adverse effects ; Mice, Transgenic ; Mice ; *Pancreatic Neoplasms/microbiology/pathology ; *Carcinogenesis/pathology ; *Inflammation/pathology/microbiology ; *Gastrointestinal Microbiome ; *Carcinoma, Pancreatic Ductal/microbiology/pathology ; Feces/microbiology ; Proto-Oncogene Proteins p21(ras)/genetics ; Male ; Mice, Inbred C57BL ; RNA, Ribosomal, 16S/genetics ; Female ; }, abstract = {An association between gut microbiota and the development of pancreatic ductal adenocarcinoma (PDAC) has been previously described. To better understand the bacterial microbiota changes accompanying PDAC promotion and progression stimulated by inflammation and fecal microbiota transplantation (FMT), we investigated stool and pancreatic microbiota by 16s RNA-based metagenomic analysis in mice with inducible acinar transgenic expressions of KrasG12D, and age- and sex-matched control mice that were exposed to inflammatory stimuli and fecal microbiota obtained from mice with PDAC. Time- and inflammatory-dependent stool and pancreatic bacterial composition alterations and stool alpha microbiota diversity reduction were observed only in mice with a Kras mutation that developed advanced pancreatic changes. Stool Actinobacteriota abundance and pancreatic Actinobacteriota and Bifidobacterium abundances increased. In contrast, stool abundance of Firmicutes, Verrucomicrobiota, Spirochaetota, Desulfobacterota, Butyricicoccus, Roseburia, Lachnospiraceae A2, Lachnospiraceae unclassified, and Oscillospiraceae unclassified decreased, and pancreatic detection of Alloprevotella and Oscillospiraceae uncultured was not observed. Furthermore, FMT accelerated tumorigenesis, gradually decreased the stool alpha diversity, and changed the pancreatic and stool microbial composition in mice with a Kras mutation. Specifically, the abundance of Actinobacteriota, Bifidobacterium and Faecalibaculum increased, while the abundance of genera such as Lachnospiraceace A2 and ASF356, Desulfovibrionaceace uncultured, and Roseburia has decreased. In conclusion, pancreatic carcinogenesis in the presence of an oncogenic Kras mutation stimulated by chronic inflammation and FMT dynamically changes the stool and pancreas microbiota. In particular, a decrease in stool microbiota diversity and abundance of bacteria known to be involved in short-fatty acids production were observed. PDAC mouse model can be used for further research on microbiota-PDAC interactions and towards more personalized and effective cancer therapies.}, }
@article {pmid40072031, year = {2025}, author = {Huang, YJ}, title = {The Microbiome in Asthma Heterogeneity: The Role of Multi-Omic Investigations.}, journal = {Immunological reviews}, volume = {330}, number = {1}, pages = {e70015}, pmid = {40072031}, issn = {1600-065X}, support = {U01 TR004066/TR/NCATS NIH HHS/United States ; 75N92024D00012-0-759202400001-1/HL/NHLBI NIH HHS/United States ; U01TR004066/TR/NCATS NIH HHS/United States ; }, mesh = {Humans ; *Asthma/microbiology/immunology/etiology ; *Microbiota/immunology ; Animals ; Disease Susceptibility ; Biomarkers ; Multiomics ; }, abstract = {Asthma is one of the most prevalent and extensively studied chronic respiratory conditions, yet the heterogeneity of asthma remains biologically puzzling. Established factors like exogenous exposures and treatment adherence contribute to variability in asthma risk and clinical outcomes. It is also clear that the endogenous factors of genetics and immune system response patterns play key roles in asthma. Despite significant existing knowledge in the above, divergent clinical trajectories and outcomes are still observed, even among individuals with similar risk profiles, biomarkers, and optimal medical management. This suggests uncaptured biological interactions that contribute to asthma's heterogeneity, for which the role of host microbiota has lately attracted much research attention. This review will highlight recent evidence in this area, focusing on bedside-to-bench investigations that have leveraged omic technologies to uncover microbiome links to asthma outcomes and immunobiology. Studies centered on the respiratory system and the use of multi-omics are noted in particular. These represent a new generation of reverse-translational investigations revealing potential functional crosstalk in host microbiomes that may drive phenotypic heterogeneity in chronic diseases like asthma. Multi-omic data offer a wide lens into ecosystem interactions within a host. This informs new hypotheses and experimental work to elucidate mechanistic pathways for unresolved asthma endotypes. Further incorporation of multi-omics into patient-centered investigations can yield new insights that hopefully lead to even more precise, microbiome-informed strategies to reduce asthma burden.}, }
@article {pmid40069605, year = {2025}, author = {Zhang, H and Wang, Y and Luo, Z and Zhang, B and Lan, X and Xu, L and Li, X and Huang, Z and Bai, J and Hu, D}, title = {Gut microbiome reveals the trophic variation and significant adaption of three sympatric forest-dwelling ungulates on the eastern Qinghai-Xizang Plateau.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {128}, pmid = {40069605}, issn = {1471-2180}, support = {YC-20018//Zhangzhou Pientzehuang Pharmaceutical Co., Ltd./ ; 2023I0046//Supported by Science and Technology Planning Project of Fujian Province, China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; RNA, Ribosomal, 16S/genetics ; Forests ; *Bacteria/classification/genetics/isolation &amp; purification ; Phylogeny ; China ; Metagenomics ; Sympatry ; *Ruminants/microbiology ; DNA, Bacterial/genetics ; *Deer/microbiology ; Sequence Analysis, DNA ; Adaptation, Physiological ; }, abstract = {BACKGROUND: The gut microbiome of herbivorous mammals regulates numerous physiological processes, including digestion and energy metabolism. The complex stomach architecture of ruminants, in conjunction with the metabolic capabilities of their microbiota, confers a considerable adaptive advantage to these animals. Nevertheless, a significant gap persists in comparative studies on the variations in the gut microbiome among sympatric ruminants and their potential adaptive implications. Accordingly, in this study, 16S rRNA gene sequencing and metagenomic approaches were used to analyse the composition and functional attributes of the gut microbiome of sympatric Moschus chrysogaster, Capricornis sumatraensis, and Cervus albirostris inhabiting the eastern periphery of the Qinghai-Xizang Plateau.<br><br>RESULTS: The gut microbiome of C. albirostris exhibited a higher diversity than that of M. chrysogaster and C. sumatraensis, whereas those of M. chrysogaster and C. sumatraensis were similar. Although species-specific variations existed among the three mammalian microbiomes, the microbiomes of C. albirostris and C. sumatraensis were more similar, whereas that of M. chrysogaster was markedly distinct. Metagenomic analysis revealed a pattern of functional convergence in the gut microbiome of the three species, with the gut microbiome of C. albirostris exhibiting a pronounced emphasis on carbohydrate metabolism, significantly surpassing that of M. chrysogaster and C. sumatraensis. Compared to the other two species, the gut microbiome of C. sumatraensis presented significantly elevated levels of amino acids and energy metabolism, whereas that of M. chrysogaster presented an increased capacity for 3-hydroxyacyl- [acyl carrier protein]-dehydratase production.<br><br>CONCLUSION: These findings suggest that the gut microbiome of sympatric M. chrysogaster, C. sumatraensis, and C. albirostris tend to converge. Metabolic variations within their gut microbiome may result in differential food resource utilisation, potentially indicating significant nutritional and ecological trait characteristics for stable coexistence.}, }
@article {pmid40069560, year = {2025}, author = {Breselge, S and Skibinska, I and Yin, X and Brennan, L and Kilcawley, K and Cotter, PD}, title = {The core microbiomes and associated metabolic potential of water kefir as revealed by pan multi-omics.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {415}, pmid = {40069560}, issn = {2399-3642}, support = {818368//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; SFI/12/RC/2273_P2//Science Foundation Ireland (SFI)/ ; USIRL-2019-1//Science Foundation Ireland (SFI)/ ; SFI/16/RC/3835//Department of Agriculture, Food and the Marine (DAFM)/ ; TC/2018/0025//Enterprise Ireland/ ; }, mesh = {*Kefir/microbiology ; Fermentation ; *Microbiota ; Metagenomics/methods ; Metagenome ; *Bacteria/genetics/metabolism/classification ; Metabolomics/methods ; Multiomics ; }, abstract = {Water kefir (WK) is an artisanal fermented beverage made from sugary water, optional fruits and WK grains. WK grains can be reused to start new fermentations. Here we investigate the microbial composition and function of 69 WK grains and their ferments by shotgun metagenomics. A subset of samples was subjected to metabolomic, including volatilomic, analysis. The impact of different fermentation practices on microbial composition and fermentation characteristics was analysed and it was noted that, for example, the common practice of drying water kefir grains significantly reduces microbial diversity and negatively impacts subsequent grain growth. Metagenomic analysis allowed the detection of 96 species within WK, the definition of core genera and the detection of different community states after 48 h of fermentation. A total of 485 bacterial metagenome assembled genomes were obtained and 18 putatively novel species were predicted. Metabolite and volatile analysis show associations between key species with flavour compounds. We show the complex microbial composition of WK and links between fermentation practices, microbes and the fermented product. The results can be used as a foundation for the selection of species for large scale WK production with desired flavour profiles and to guide the regulatory framework for commercial WK production.}, }
@article {pmid40068786, year = {2025}, author = {Wang, L and Zhao, G and Guo, W and Li, Y and Chen, J and Niu, L}, title = {Microbial transformation of sulfur-containing dissolved organic matter in the intertidal zone of a mountainous river estuary responding to tidal fluctuation.}, journal = {Environmental research}, volume = {274}, number = {}, pages = {121363}, doi = {10.1016/j.envres.2025.121363}, pmid = {40068786}, issn = {1096-0953}, mesh = {*Estuaries ; *Sulfur/metabolism ; China ; Geologic Sediments/microbiology/chemistry ; Rivers/microbiology ; *Water Pollutants, Chemical/metabolism ; Microbiota ; *Tidal Waves ; Environmental Monitoring ; }, abstract = {Tidal fluctuation disturbances and amplified anthropogenic activities are defining characteristics of the intertidal zones of mountainous river estuaries. The accumulation and degradation of organic matter and nutrients in the sediments result in a complex element migration and transformation dynamics. Nonetheless, microbial transformation of dissolved organic sulfur (DOS) in the intertidal sediments upon tidal fluctuation remains poorly understood. Here, by taking a representative small mountainous river estuary in southeast China as an example, we synthesize evidence describing the composition of dissolved organic matter (DOM), microbial community structure and metabolic functions in sediments of variable depths (0-80 cm) at both high and low tide via FT-ICR-MS and metagenomic approach. Labile DOM, e.g., aliphatic and proteins were more inclined to be enriched in shallow sediments (0-30 cm). Upon tidal inundation, Thaumarchaeota was verified to facilitate the accumulation of recalcitrant organic matter through the mevalonate pathway, elevating the proportion of carboxyl-rich alicyclic molecules (CRAMs) and lignins in sediments. Whereas during ebb period, the microbial production of DOS through assimilated sulfate reduction (ASR) was signally intensified, contributing to the accumulation of sulfur-containing organic matter in deeper sediments. Based on the associations between Kyoto encyclopedia of Genes and Genomes modules and DOM formulas, cobalamin biosynthesis, ASR, and cysteine biosynthesis were observed positively correlated with the accumulation of sulfur-containing organic matter. Microbial community exhibited obvious taxonomic and functional variations between flood and ebb states. Nitrososphaerta in shallow sediments (0∼30 cm) was beneficial for the production of nitrogen-containing organic matter, while Bathyarchaeota and Chloroflexota in deep sediments (70-80 cm) predominantly governed the mineralization of organic matter. We firstly provided metagenomic evidence for the microbial transformation of sulfur-containing dissolved organic matter in the intertidal zone of a mountainous river estuary, which will be key to predicting coastal carbon storage and offer an important scientific basis for formulating intertidal ecosystem management and restoration strategies.}, }
@article {pmid40068396, year = {2025}, author = {Guo, M and Wu, Y and Huang, H and Li, S and Zhao, L and Cao, J and Wang, C}, title = {Revealing the critical role of rare bacterial communities in shaping antibiotic resistance genes in saline soils through metagenomic analysis.}, journal = {Journal of hazardous materials}, volume = {491}, number = {}, pages = {137848}, doi = {10.1016/j.jhazmat.2025.137848}, pmid = {40068396}, issn = {1873-3336}, mesh = {*Soil Microbiology ; Metagenomics ; Salinity ; *Soil/chemistry ; *Drug Resistance, Microbial/genetics ; *Genes, Bacterial ; *Bacteria/genetics/drug effects ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; Microbiota ; }, abstract = {Salinity is considered one of the basic abiotic factors influencing the diversity and distribution of antibiotic resistance genes (ARGs) in soils, yet little is known about the distribution and driving factors of ARGs in naturally saline soils. In this study, metagenomic analysis was conducted to explore the intricate dynamics among soil salinity, microbial community structure and ARGs propagation, with a particular focus on the key contribution of rare potential-hosts of ARGs in light and heavy saline soils. The findings revealed that salinity was significantly negatively correlated with the abundance of ARGs, light saline soils hosted a greater abundance of ARGs than high saline soils, with particularly significant enrichment in genes conferring resistance to multidrug, vancomycin, bacitracin and tetracenomycin C. Proteobacteria and Actinobacteria were identified as primary hosts for ARGs. Notably, rare potential hosts of ARGs play a crucial role in shaping the abundance of ARGs despite their low relative abundance (0.85 %), significantly influencing the relative abundance of ARGs in light and heavy saline soils. The average degree of rare potential-hosts of ARGs was found to be higher in light saline soils (average degree = 45.729 and 25.923 in light and heavy saline soils, respectively), and there was stronger interaction connected between microorganisms (edges = 35,760 and 20,259 in light and heavy saline soils, respectively). Also, microbial community niche width and niche overlap of rare potential-hosts of ARGs in light saline soils were significantly greater than that in heavy saline soils. This work emphasizes the importance of bacterial communities of rare potential-hosts of ARGs on antibiotic resistome, and provides advanced insights into the fate and dissemination of ARGs in saline soils.}, }
@article {pmid40068342, year = {2025}, author = {Song, R and Lv, B and He, Z and Li, H and Wang, H}, title = {Rhizosphere metabolite dynamics in continuous cropping of vineyards: Impact on microflora diversity and co-occurrence networks.}, journal = {Microbiological research}, volume = {296}, number = {}, pages = {128134}, doi = {10.1016/j.micres.2025.128134}, pmid = {40068342}, issn = {1618-0623}, mesh = {*Rhizosphere ; *Soil Microbiology ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; *Fungi/classification/metabolism/genetics/isolation &amp; purification ; Biodiversity ; *Vitis/microbiology/growth &amp; development ; Soil/chemistry ; Microbiota ; Crops, Agricultural/microbiology/growth &amp; development ; Farms ; Metabolomics ; Metagenomics ; Metabolome ; }, abstract = {The metabolism of the crop rhizosphere affects microflora diversity and nutrient cycling. However, understanding rhizosphere metabolism in suitable crops within arid desert environments and its impact on microflora interactions remains limited. Through metagenomic and non-targeted metabolomic sequencing of rhizosphere soils from one uncultivated land and four vineyards with cropping years of 5, 10, 15 and 20 years, the critical importance of rhizosphere metabolites in maintaining bacterial and fungal diversity was elucidated. The results revealed that Nocardioides, Streptomyces, and Solirubrobacter were the relatively abundant bacterial genera in rhizosphere soils, while Rhizophagus, Glomus, and Pseudogymnoascus were the relatively abundant fungal genera. The composition of rhizosphere metabolic changed significantly during the continuous cropping of grapevines. Dimethylglycine, Formononetin, and Dehydroepiandrosterone were the most important metabolites. Enrichment analysis revealed significant involvement of metabolic pathways such as biosynthesis of amino acids, unsaturated fatty acids, and linoleic acid metabolism. Procrustes analysis highlighted stronger correlations between rhizosphere metabolites and bacterial community compared to those of fungal community. This suggests distinct responses of microflora to crop-released chemical elements across different soil habitats. Co-occurrence network analysis demonstrated complex associations between rhizosphere metabolites and soil microflora, the positive correlations between rhizosphere metabolites and microflora networks predominated over negative correlations. Partial least squares path model indicated that the effect of cropping years on rhizosphere metabolites was greater than that on bacterial microflora diversity. Futhermore, pH, total phosphorus, and alkali-hydrolyzed nitrogen were the key environmental factors affecting rhizosphere metabolites and microbial diversity. These results deepen our valuable insights into the complex biological processes that rhizosphere metabolites influence on microorganisms, and provide strong support for maintaining microbial diversity in farmland soils in arid regions.}, }
@article {pmid40065594, year = {2025}, author = {Sun, Y and Yu, YT and Castillo, XO and Anderson, R and Wang, M and Sun, Q and Tallmadge, R and Sams, K and Reboul, G and Zehr, J and Brown, J and Wang, X and Marra, N and Stanhope, B and Grenier, J and Pusterla, N and Divers, T and Mittel, L and Goodman, LB}, title = {Investigation of the Blood Microbiome in Horses With Fever of Unknown Origin.}, journal = {Veterinary medicine and science}, volume = {11}, number = {2}, pages = {e70272}, pmid = {40065594}, issn = {2053-1095}, support = {//Harry M. Zweig Memorial Fund for Equine Research/ ; 1U18FD006993//US Food and Drug Administration's Veterinary Laboratory Investigation and Response Network/ ; 1U18FD006716//US Food and Drug Administration's Veterinary Laboratory Investigation and Response Network/ ; W81XWH-22-1-0891//Department of Defense/ ; }, mesh = {Horses ; Animals ; *Horse Diseases/microbiology/blood ; Case-Control Studies ; *Fever of Unknown Origin/veterinary/microbiology/blood ; Male ; Female ; *Microbiota ; }, abstract = {BACKGROUND: Fever of unknown origin (FUO) without a respiratory component is a frequent clinical presentation in horses. Multiple pathogens, both tick-borne and enteric, can be involved as etiologic agents. An additional potential mechanism is intestinal barrier dysfunction.<br><br>OBJECTIVES: This case-control study aimed to detect and associate microbial taxa in blood with disease state.<br><br>STUDY DESIGN: Areas known for a high prevalence of tick-borne diseases in humans were chosen to survey horses with FUO, which was defined as fever of 101.5&#xb0;F or higher with no signs of respiratory illness or other recognisable diseases. Blood samples and clinical parameters were obtained from 52 FUO cases and also from matched controls from the same farms. An additional 23 febrile horses without matched controls were included.<br><br>METHODS: Broadly targeted polymerase chain reaction (PCR) amplification directed at conserved sequence regions of bacterial 16S rRNA, parasite 18S rRNA, coronavirus RdRp and parvovirus NS1 was performed, followed by deep sequencing. To control for contamination and identify taxa unique to the cases, metagenomic sequences from the controls were subtracted from those of the cases, and additional targeted molecular testing was performed. Sera were also tested for antibodies to equine coronavirus.<br><br>RESULTS: Over 60% of cases had intestinal microbial DNA circulating in the blood. Nineteen percent of cases were attributed to infection with Anaplasma phagocytophilum, of which two were subtyped as human-associated strains. A novel Erythroparvovirus was detected in two cases and two controls. Serum titres for equine coronavirus were elevated in some cases but not statistically different overall between the cases and controls.<br><br>MAIN LIMITATIONS: Not all pathogens are expected to circulate in blood, which was the sole focus of this study.<br><br>CONCLUSIONS: The presence of commensal gut microbes in blood of equine FUO cases is consistent with a compromised intestinal barrier, which is highlighted as a direction for future study.}, }
@article {pmid40064809, year = {2025}, author = {Ouarabi, L and Taminiau, B and Daube, G and Barache, N and Bendali, F and Drider, D and Lucau-Danila, A}, title = {Insights into fungal diversity and dynamics of vaginal mycobiota.}, journal = {Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]}, volume = {56}, number = {2}, pages = {1095-1101}, pmid = {40064809}, issn = {1678-4405}, support = {Alibiotech CPER/FEDER 2016-2021//R&#xe9;gion Hauts-de-France/ ; }, mesh = {Female ; *Vagina/microbiology ; Humans ; *Fungi/classification/genetics/isolation &amp; purification ; *Mycobiome ; Adult ; Middle Aged ; *Biodiversity ; Algeria ; Young Adult ; Metagenomics ; Phylogeny ; Microbiota ; }, abstract = {Although less studied than its bacterial counterpart, the fungal component of the vaginal microbiota plays a critical role in maintaining vaginal homeostasis. Most research on the composition of the vaginal mycobiota has focused on pathological conditions, with relatively few studies involving healthy women. To gain comprehensive insights into the vaginal mycobiota of Algerian women in two different age groups, we performed a targeted metagenomic analysis using ITS2 region sequencing data from 14 vaginal samples collected from healthy women in reproductive and postmenopausal stages. A single dominant fungal species per individual was observed in both young and postmenopausal women, with differences in fungal community composition between the two groups being related to hormone levels. Our results show that Candida and Saccharomyces were the dominant genera in both young and postmenopausal women. Notably, the postmenopausal group had twice as many species, along with the presence of uncommon taxa such as Dipodascus and Fusarium, indicating greater taxonomic diversity. These findings suggest that menopause is associated with increased microbial variability, likely due to hormonal changes that disrupt the vaginal environment. This study paves the way for more extensive analyses involving diverse age groups and ethnic backgrounds.}, }
@article {pmid40064231, year = {2025}, author = {Jia, Y and Huang, D and Lan, X and Sun, X and Lin, W and Sun, W and Wang, Y}, title = {Community structure and metabolic potentials of keystone taxa and their associated bacteriophages within rice root endophytic microbiome in response to metal(loid)s contamination.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {372}, number = {}, pages = {126028}, doi = {10.1016/j.envpol.2025.126028}, pmid = {40064231}, issn = {1873-6424}, mesh = {*Oryza/microbiology ; *Microbiota/drug effects ; Plant Roots/microbiology ; Endophytes ; *Soil Pollutants/toxicity ; *Metals, Heavy ; *Bacteriophages ; Bacteria ; }, abstract = {Heavy metal (HM) contamination of agricultural products is of global environmental concern as it directly threatened the food safety. Plant-associated microbiome, particularly endophytic microbiome, hold the potential for mitigating HM stress as well as promoting plant growth. The metabolic potentials of the endophytes, especially those under the HM stresses, have not been well addressed. Rice, a major staple food worldwide, is more vulnerable to HM contamination compared to other crops and therefore requires special attentions. Therefore, this study selected rice as the target plants. Geochemical analysis and amplicon sequencing were combined to characterize the rice root endophytic bacterial communities and identify keystone taxa in two HM-contaminated rice fields. Metagenomic analysis was employed to investigate the metabolic potentials of these keystone taxa. Burkholderiales and Rhizobiales were identified as predominant keystone taxa. The metagenome-assembled genome (MAG)s associated with these keystone populations suggested that they possessed diverse genetic potentials related to metal resistance and transformation (e.g., As resistance and cycling, V reduction, Cr efflux and reduction), and plant growth promotion (nitrogen fixation, phosphate solubilization, oxidative stress resistance, indole-3-acetic acid, and siderophore production). Moreover, bacteriophages encoding auxiliary metabolism genes (AMGs) associated with the HM resistance as well as nitrogen and phosphate acquisition were identified, suggesting that these phages may contribute to these crucial biogeochemical processes within rice roots. The current findings revealed the beneficial roles of rice endophytic keystone taxa and their associated bacteriophages within HM-contaminated rice root endophytic microbiome, which may provide valuable insights on future applications of employing root microbiome for safety management of agriculture productions.}, }
@article {pmid40063888, year = {2025}, author = {Saraphol, B and Hinthong, W and Chienwichai, P and Pumipuntu, N and Reamtong, O and Srisook, T and Premsuriya, J}, title = {Analysis of the fecal microbiome and metabolome in dairy cows with different body condition scores.}, journal = {PloS one}, volume = {20}, number = {3}, pages = {e0319461}, pmid = {40063888}, issn = {1932-6203}, mesh = {Animals ; Cattle ; *Feces/microbiology ; Female ; *Metabolome ; RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome ; *Microbiota ; }, abstract = {Holstein Friesian is the most popular breed of dairy cows worldwide due to its exceptional milk production capabilities. In dairy cow management, the body condition score (BCS) is a useful tool, serving as a reliable indicator of a cow's nutritional status and overall health. It is determined via a subjective visual and tactile assessment of fat cover and muscle mass. A low BCS is associated with decreased milk production and fertility. While genetic and nutritional factors have previously been associated with BCS, their effects are often moderate. In this study, we compared the fecal microbiome and the untargeted fecal metabolome of normal (BCS ≥ 3, n = 16) and thin (BCS < 3, n = 16) Holstein Friesian dairy cows. The 16S rRNA gene-based metagenomic analysis revealed that thin cows had significantly higher levels of Clostridiaceae, Erysipelotrichales, Erysipelotrichaceae, and Turicibacter, while normal cows had higher levels of Clostridiales_vadinBB60_group, UCG-010, Bacteroidaceae, Ruminococcaceae, Paludibacteraceae, Alistipes, and Bacteroides. The fecal metabolomic analysis showed that key signaling pathways, including the mechanistic target of rapamycin (mTOR), phosphatidylinositol 3-kinase (PI3K)-Akt, and AMP-activated protein kinase (AMPK) pathways, were enriched in thin cows. In addition, a significant correlation was observed between differential microbial taxa and metabolites. Notably, Clostridiaceae and Erysipelotrichaceae species are linked to inflammation, infectious diseases, and conditions such as ruminal acidosis. Additionally, the mTOR, PI3K-Akt, and AMPK pathways are known to be activated by both nutrient deficiencies and inflammation. We propose that, in addition to genetic and nutritional factors, gut microbiome dysbiosis may contribute to subclinical health conditions, such as chronic inflammation and acidosis, which indirectly affect the cow's BCS. These findings are guiding our ongoing research on the underlying health conditions in thin cows to better understand the role that the gut microbiome plays in the regulation of the body condition.}, }
@article {pmid40063675, year = {2025}, author = {Chavarria, X and Park, HS and Oh, S and Kang, D and Choi, JH and Kim, M and Cho, YH and Yi, MH and Kim, JY}, title = {Using gut microbiome metagenomic hypervariable features for diabetes screening and typing through supervised machine learning.}, journal = {Microbial genomics}, volume = {11}, number = {3}, pages = {}, pmid = {40063675}, issn = {2057-5858}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Supervised Machine Learning ; *Diabetes Mellitus, Type 2/microbiology/diagnosis ; RNA, Ribosomal, 16S/genetics ; *Metagenomics/methods ; Male ; Female ; Middle Aged ; Adult ; *Diabetes Mellitus, Type 1/microbiology/diagnosis ; *Bacteria/classification/genetics ; Machine Learning ; Metagenome ; Support Vector Machine ; }, abstract = {Diabetes mellitus is a complex metabolic disorder and one of the fastest-growing global public health concerns. The gut microbiota is implicated in the pathophysiology of various diseases, including diabetes. This study utilized 16S rRNA metagenomic data from a volunteer citizen science initiative to investigate microbial markers associated with diabetes status (positive or negative) and type (type 1 or type 2 diabetes mellitus) using supervised machine learning (ML) models. The diversity of the microbiome varied according to diabetes status and type. Differential microbial signatures between diabetes types and negative group revealed an increased presence of Brucellaceae, Ruminococcaceae, Clostridiaceae, Micrococcaceae, Barnesiellaceae and Fusobacteriaceae in subjects with diabetes type 1, and Veillonellaceae, Streptococcaceae and the order Gammaproteobacteria in subjects with diabetes type 2. The decision tree, elastic net, random forest (RF) and support vector machine with radial kernel ML algorithms were trained to screen and type diabetes based on microbial profiles of 76 subjects with type 1 diabetes, 366 subjects with type 2 diabetes and 250 subjects without diabetes. Using the 1000 most variable features, tree-based models were the highest-performing algorithms. The RF screening models achieved the best performance, with an average area under the receiver operating characteristic curve (AUC) of 0.76, although all models lacked sensitivity. Reducing the dataset to 500 features produced an AUC of 0.77 with sensitivity increasing by 74% from 0.46 to 0.80. Model performance improved for the classification of negative-status and type 2 diabetes. Diabetes type models performed best with 500 features, but the metric performed poorly across all model iterations. ML has the potential to facilitate early diagnosis of diabetes based on microbial profiles of the gut microbiome.}, }
@article {pmid40062854, year = {2025}, author = {Zhang, F and Luan, J and Suo, L and Wang, H and Zhao, Y and Sun, T and Ni, Y and Cao, H and Zou, X and Liu, B}, title = {Altered gut microbiota and metabolite profiles in community-acquired pneumonia: a metagenomic and metabolomic study.}, journal = {Microbiology spectrum}, volume = {13}, number = {4}, pages = {e0263924}, pmid = {40062854}, issn = {2165-0497}, support = {2022YFA1304303//National Key R&amp;D Program of China/ ; tsqn202103196//Taishan Scholars Program of Shandong Province/ ; 82370017//National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; Feces/microbiology/chemistry ; Middle Aged ; *Community-Acquired Infections/microbiology/metabolism ; *Pneumonia/microbiology/metabolism ; Aged ; Metagenomics ; Metabolomics ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Fatty Acids, Volatile/metabolism ; *Metabolome ; Bile Acids and Salts/metabolism ; Adult ; Community-Acquired Pneumonia ; }, abstract = {UNLABELLED: Emerging evidence suggests that altered gut microbiota is linked to community-acquired pneumonia (CAP), but the potential mechanisms by which gut microbiota and its metabolites contribute to the development of CAP remain unclear. Fecal samples from 32 CAP patients and 36 healthy controls were analyzed through metagenomic sequencing and metabolomic profiling. The gut microbiota composition in CAP patients showed significant differences and lower diversity compared to healthy controls. Genera involved in short-chain fatty acid (SCFA) production, such as Faecalibacterium, Ruminococcus, and Eubacterium, as well as species like Faecalibacterium prausnitzii, Bifidobacterium adolescentis, Eubacterium rectale, Prevotella copri, and Ruminococcus bromii, were significantly depleted in CAP patients. Bacterial co-occurrence network analysis revealed an over-representation of pro-inflammatory bacteria, which contributed to the core gut microbiome in CAP patients. Metabolomic analysis of fecal samples identified a distinct metabolic profile, with a notable increase in arachidonic acid, but a decrease in secondary bile acids, such as deoxycholic acid, lithocholic acid, and ursodeoxycholic acid, compared to healthy controls. Spearman correlation analysis between differential microbiota and bile acids showed that Faecalibacterium prausnitzii, Bifidobacterium adolescentis, Eubacterium rectale, and Prevotella copri were positively correlated with ursocholic acid, lithocholic acid, and ursodeoxycholic acid, respectively. Our results suggest that the reduction in secondary bile acids, insufficient production of SCFAs, and an overabundance of pro-inflammatory bacteria may contribute to metabolic inflammation in the body. These factors could play a key role in the pathogenesis of CAP, driven by gut microbiota alterations.<br><br>IMPORTANCE: This study presents a comprehensive metagenomic and metabolomic analysis of fecal samples from community-acquired pneumonia (CAP) patients, identifying key characteristics, such as decreased secondary bile acids, imbalanced short-chain fatty acid production, and increased pro-inflammatory bacteria. These findings provide valuable insights into the mechanisms linking gut microbiota alterations to CAP pathogenesis and suggest that targeting the gut microbiota could be a promising strategy for intervening in CAP.}, }
@article {pmid40062772, year = {2025}, author = {Connolly, JP and Kelly, L}, title = {The physical biogeography of Fusobacterium nucleatum in health and disease.}, journal = {mBio}, volume = {16}, number = {4}, pages = {e0298924}, pmid = {40062772}, issn = {2150-7511}, support = {T32 GM007491/GM/NIGMS NIH HHS/United States ; 5T32GM007491-46//HHS | National Institutes of Health (NIH)/ ; //Elsa U. Pardee Foundation (EUPF)/ ; }, mesh = {*Fusobacterium nucleatum/genetics/isolation &amp; purification/classification/physiology ; Humans ; *Colorectal Neoplasms/microbiology ; Female ; Male ; *Fusobacterium Infections/microbiology ; Crohn Disease/microbiology ; Feces/microbiology ; *Gastrointestinal Microbiome ; Metagenome ; Gingiva/microbiology ; Genome, Bacterial ; }, abstract = {UNLABELLED: Fusobacterium nucleatum (Fn) is an oral commensal inhabiting the human gingival plaque that is rarely found in the gut. However, in colorectal cancer (CRC), Fn can be isolated from stool samples and detected in metagenomes. We hypothesized that ecological characteristics of the gut are altered by disease, enabling Fn to colonize. Multiple genomically distinct populations of Fn exist, but their ecological preferences are unstudied. We identified six well-separated populations in 133 Fn genomes and used simulated metagenomes to demonstrate sensitive detection of populations in human oral and gut metagenomes. In 9,560 samples from 11 studies, Fn population C2 animalis is elevated in gut metagenomes from CRC and Crohn's disease patients and is observed more frequently in CRC stool samples than in the gingiva. Polymorphum, the most prevalent gingival Fn population, is significantly increased in Crohn's stool samples; this effect was significantly stronger in male hosts than in female. We find polymorphum genomes are enriched for biosynthetic gene clusters and fluoride exporters, while C2 animalis are high in iron transporters. Fn populations thus associate with specific clinical and demographic phenotypes and harbor distinct functional features. Ecological differences in closely related groups of bacteria inform microbiome impacts on human health.<br><br>IMPORTANCE: Fusobacterium nucleatum is a bacterium normally found in the gingiva. F. nucleatum generally does not colonize the healthy gut, but is observed in approximately a third of colorectal cancer (CRC) patient guts. F. nucleatum's presence in the gut during CRC has been linked to worse prognosis and increased tumor proliferation. Here, we describe the population structure of F. nucleatum in oral and gut microbiomes. We report substantial diversity in gene carriage among six distinct populations of F. nucleatum and identify population disease and body-site preferences. We find the C2 animalis population is more common in the CRC gut than in the gingiva and is enriched for iron transporters, which support gut colonization in known pathogens. We find that C2 animalis is also enriched in Crohn's disease and type 2 diabetes, suggesting ecological commonalities between the three diseases. Our work shows that closely related bacteria can have different associations with human physiology.}, }
@article {pmid40060112, year = {2024}, author = {Wei, B and Xu, Q and Kong, J and Su, X and Chen, K and Wang, H}, title = {Metagenomics-based study of rhizospheric microorganisms of Poa alpigena L. in Qinghai Lake, Ganzi River Plateau.}, journal = {Frontiers in plant science}, volume = {15}, number = {}, pages = {1518637}, pmid = {40060112}, issn = {1664-462X}, abstract = {INTRODUCTION: Poa alpigena Lindm., a dominant forage grass on the Tibetan Plateau, plays a critical role in livestock production and grassland restoration. This study investigates the rhizospheric and non-rhizospheric soil microorganisms of Poa alpigena L. in the Ganzi River area of the Qinghai Lake basin using metagenomic sequencing to understand their diversity and potential ecological functions.<br><br>METHODS: Soil samples were collected from rhizospheric and non-rhizospheric areas of Poa alpigena L. using the S-type five-point sampling method. DNA was extracted, and metagenomic sequencing was performed using the BGISEQ-500 platform. Alpha and Beta diversity analyses were conducted, and LEfSe analysis was used to identify differentially abundant microbial taxa and metabolic pathways.<br><br>RESULTS: A total of 5,681 microbial species across 1,606 genera, 521 families, 61 phyla, and 246 orders were identified. Non-rhizospheric soils exhibited higher species richness than rhizospheric soils. Proteobacteria was the most abundant phylum in both soil types. Rhizospheric soils showed significant enrichment in pathways related to antibiotic biosynthesis, carbon metabolism, and methane metabolism, while non-rhizospheric soils were enriched in quorum sensing and drug-metabolizing pathways.<br><br>DISCUSSION: The findings highlight the selective influence of Poa alpigena L. on soil microbial communities and their potential role in mitigating methane emissions. The study provides a foundation for understanding the ecological functions of soil microorganisms in alpine meadows and supports sustainable grassland management practices.}, }
@article {pmid40059174, year = {2025}, author = {Jin, X and Cheng, AG and Chanin, RB and Yu, FB and Dimas, A and Jasper, M and Weakley, A and Yan, J and Bhatt, AS and Pollard, KS}, title = {Comprehensive profiling of genomic invertons in defined gut microbial community reveals associations with intestinal colonization and surface adhesion.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {71}, pmid = {40059174}, issn = {2049-2618}, support = {R01 HL160862/HL/NHLBI NIH HHS/United States ; HL160862/HL/NHLBI NIH HHS/United States ; 1563159//National Science Foundation/ ; }, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; Metagenomics/methods ; *Bacterial Adhesion/genetics ; *Bacteria/genetics/classification ; *Intestines/microbiology ; Computational Biology/methods ; Metagenome ; Promoter Regions, Genetic ; Feces/microbiology ; }, abstract = {BACKGROUND: Bacteria use invertible genetic elements known as invertons to generate heterogeneity among a population and adapt to new and changing environments. In human gut bacteria, invertons are often found near genes associated with cell surface modifications, suggesting key roles in modulating dynamic processes such as surface adhesion and intestinal colonization. However, comprehensive testing of this hypothesis across complex bacterial communities like the human gut microbiome remains challenging. Metagenomic sequencing holds promise for detecting inversions without isolation and culturing, but ambiguity in read alignment limits the accuracy of the resulting inverton predictions.<br><br>RESULTS: Here, we developed a customized bioinformatic workflow-PhaseFinderDC-to identify and track invertons in metagenomic data. Applying this method to a defined yet complex gut community (hCom2) across different growth environments over time using both in vitro and in vivo metagenomic samples, we detected invertons in most hCom2 strains. These include invertons whose orientation probabilities change over time and are statistically associated with environmental conditions. We used motif enrichment to identify putative inverton promoters and predict genes regulated by inverton flipping during intestinal colonization and surface adhesion. Analysis of inverton-proximal genes also revealed candidate invertases that may regulate flipping of specific invertons.<br><br>CONCLUSIONS: Collectively, these findings suggest that surface adhesion and intestinal colonization in complex gut communities directly modulate inverton dynamics, offering new insights into the genetic mechanisms underlying these processes. Video Abstract.}, }
@article {pmid40058902, year = {2025}, author = {Revelo-Romo, DM and Hurtado Gutiérrez, NH and Hidalgo Troya, A and Amaya-Gómez, CV and Flórez-Martínez, DH and Overmann, J and Villegas Torres, MF and González Barrios, AF}, title = {Omics approaches to explore the coffee fermentation microecosystem and its effects on cup quality.}, journal = {Food research international (Ottawa, Ont.)}, volume = {206}, number = {}, pages = {116035}, doi = {10.1016/j.foodres.2025.116035}, pmid = {40058902}, issn = {1873-7145}, mesh = {*Fermentation ; *Coffee/microbiology/chemistry ; *Coffea/microbiology ; Microbiota ; Food Handling/methods ; Metabolomics ; Metagenomics ; Seeds/microbiology/chemistry ; *Food Quality ; }, abstract = {The cultivation and postharvest processing of coffee constitute the basis of the subsistence and traditional culture for rural family-owned farms, as well as for the economic success of commercial enterprises in many coffee-producing countries worldwide. The quality of the final beverage is determined by a multitude of variables. A key post-harvest factor is the spontaneous fermentation of the coffee beans, conducted directly on the farm, to remove the mucilage that firmly adheres to the beans. The effect of this fermentation step on the aromatic profile of the coffee is not yet sufficiently understood. All of the above have drawn the attention of researchers on the application of various omics approaches to elucidate fermentation processes in more detail. These approaches have been used to study the fermentation of Arabica (Coffea arabica) beans, as this species is economically most important worldwide. It is known that Arabica mild coffee is obtained through the wet method, which involves fermenting depulped coffee beans using various strategies and then washing the fermented coffee with clean water. In contrast, the fermentation of Canephora coffee beans has been much less studied using omics technologies. This review highlights the trends and future research in coffee fermentation based on a scientometric analysis, supplemented by a traditional systematic literature review. It highlights the composition of the coffee fermentation microbiome, as elucidated by metagenomics applications, in light of several factors that can influence its structure. Additionally, it considers the metabolites associated with microbial metabolism that can influence the chemical composition of coffee beans and, consequently, the cup quality. In this way, this review evidences the promising path in understanding microbial functions in coffee fermentation and in particular in the development of microbial inocula and in the refinement of fermentation processes to improve coffee quality.}, }
@article {pmid40058900, year = {2025}, author = {Wang, X and Li, Q and Li, W and Cai, G and Wu, D and Xie, G and Lu, J}, title = {Metagenomics unveils the roles of microbes in the metabolic network of purine formation during Huangjiu fermentation.}, journal = {Food research international (Ottawa, Ont.)}, volume = {206}, number = {}, pages = {116031}, doi = {10.1016/j.foodres.2025.116031}, pmid = {40058900}, issn = {1873-7145}, mesh = {*Fermentation ; *Purines/metabolism/analysis/biosynthesis ; *Metagenomics/methods ; *Bacteria/metabolism/genetics/classification ; *Metabolic Networks and Pathways ; Microbiota ; *Fermented Foods/microbiology ; }, abstract = {Purine is a major factor contributing to the development of hyperuricemia and gout, and it is found in large quantities in Huangjiu as free bases. Purine production in Huangjiu is strongly associated with microbial metabolism. However, to the best of our knowledge the microorganisms responsible for and the mechanisms of purine formation during Huangjiu fermentation are yet to be evaluated. Herein, changes in purine levels during Huangjiu fermentation were analyzed. Further, the microbes responsible for purine production were identified and their gene abundance was studied. Results revealed that adenine, guanine, hypoxanthine, and xanthine are produced during Huangjiu fermentation. The total purines content on day 0 (27.99 mg/L) was found to be considerably lower than that produced on day 24 (122.15 mg/L) during Huangjiu fermentation. Metagenomics showed that the composition of the microbial community fluctuates sharply during five fermentation periods of Huangjiu, with the microbial community richness and diversity being the most prominent on day 3. At the genus level, Klebsiella, Lactobacillus, Staphylococcus, Saccharopolyspora, and Saccharomyces were abundant during Huangjiu fermentation and were involved in purine metabolism. Relationships between the dominant microorganisms and key enzyme genes of the purine pathways were also established based on the Kyoto Encyclopedia of Genes and Genomes database. Correlation analysis showed that Lactobacillus and Saccharomyces were the main genera involved in purine formation. Saccharomyces cerevisiae, Lactobacillus paralimentarius, and Lactiplantibacillus plantarum were involved in purine formation during Huangjiu fermentation. Overall, this study improves our understanding of the purine formation mechanism during Huangjiu fermentation and provides valuable insights into the regulation of purine formation by microorganisms.}, }
@article {pmid40058443, year = {2025}, author = {Zhou, Y and Li, MY and Li, CY and Sheng, YJ and Ye, QT and Chen, RY and Zhou, KY and Zhang, Y and Shen, LF and Shou, D}, title = {Effective mechanism of polysaccharides from Erxian herbal pair in promoting bone repair in traumatic osteomyelitis by activating osteoblast GPR41 and inhibiting the MEK/ERK/MAPK signalling axis.}, journal = {International journal of biological macromolecules}, volume = {307}, number = {Pt 1}, pages = {141858}, doi = {10.1016/j.ijbiomac.2025.141858}, pmid = {40058443}, issn = {1879-0003}, mesh = {Animals ; *Polysaccharides/pharmacology/chemistry ; *Osteoblasts/drug effects/metabolism ; *Osteomyelitis/drug therapy/metabolism/pathology ; Rats ; *MAP Kinase Signaling System/drug effects ; *Receptors, G-Protein-Coupled/metabolism ; Male ; Gastrointestinal Microbiome/drug effects ; Rats, Sprague-Dawley ; *Bone Regeneration/drug effects ; Disease Models, Animal ; }, abstract = {Polysaccharides are the key components of natural products; however, their effects on bone repair haven't been fully evaluated. This study aimed to assess the efficacy and mechanism of polysaccharides in promoting bone repair. The Erxian herb pair polysaccharide (EHP) was isolated and purified using water extraction (1:20 (w/v); 100 ± 2 °C; 5 h) and alcohol precipitation (80 ± 2 %). A traumatic osteomyelitis (TO) rat model was established using lipopolysaccharide (LPS). The gut microbiota was analysed through intestinal flora and metagenomic sequencing. The results revealed that the yields of crude polysaccharide and purified polysaccharide EHP were 3.73 ± 0.34 % and 0.48 ± 0.06 %, respectively. The total sugar content of EHP was 83.53 ± 0.16 %. The EHP, with a molecular weight of 31.964 kDa, was primarily composed of mannose, rhamnose, glucose, galactose, and arabinose. In vivo experiments demonstrated that EHP intervention (300 mg/kg/day) significantly augmented bone density and enhanced the activity of alkaline phosphatase (ALP) (P < 0.01). EHP upregulated the abundance of probiotics and increased the production of butyric acid (P < 0.05). In vitro experiments revealed that butyric acid (500-1000 μM) enhanced osteoblast activity and inhibited the expression of mitogen-activated protein kinase kinase (MEK) and extracellular signal-regulated kinase (ERK) (P < 0.01). These findings indicate that polysaccharides may represent a promising therapeutic agent for bone-healing.}, }
@article {pmid40057978, year = {2025}, author = {Jeevannavar, A and Florenza, J and Divne, AM and Tamminen, M and Bertilsson, S}, title = {Cellular heterogeneity in metabolism and associated microbiome of a non-model phytoflagellate.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40057978}, issn = {1751-7370}, mesh = {*Microbiota ; Single-Cell Analysis ; Transcriptome ; Gene Expression Profiling ; Photosynthesis ; Bacteria/classification/genetics ; }, abstract = {Single-cell transcriptomics is a key tool for unravelling metabolism and tissue diversity in model organisms. Its potential for elucidating the ecological roles of microeukaryotes, especially non-model ones, remains largely unexplored. This study employed the Smart-seq2 protocol on Ochromonas triangulata, a microeukaryote lacking a reference genome, showcasing how transcriptional states align with two distinct growth phases: a fast-growing phase and a slow-growing phase. Besides the two expected expression clusters, each corresponding to either growth phase, a third transcriptional state was identified across both growth phases. Metabolic mapping revealed a boost of photosynthetic activity in the fast growth over the slow growth stage, as well as downregulation trend in pathways associated with ribosome functioning, CO2 fixation, and carbohydrate catabolism characteristic of the third transcriptional state. In addition, carry-over rRNA reads recapitulated the taxonomic identity of the target while revealing distinct bacterial communities, in co-culture with the eukaryote, each associated with distinct transcriptional states. This study underscores single-cell transcriptomics as a powerful tool for characterizing metabolic states in microeukaryotes without a reference genome, offering insights into unknown physiological states and individual-level interactions with different bacterial taxa. This approach holds broad applicability to describe the ecological roles of environmental microeukaryotes, culture-free, and reference-free, surpassing alternative methods like metagenomics or metatranscriptomics.}, }
@article {pmid40057571, year = {2025}, author = {Adams, SE and Cawley, AK and Arnold, D and Hoptroff, MJ and Slomka, V and Matheson, JR and Marriott, RE and Gemmell, MR and Marsh, PD}, title = {A randomised, double-blind clinical study into the effect of zinc citrate trihydrate toothpaste on oral plaque microbiome ecology and function.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {8136}, pmid = {40057571}, issn = {2045-2322}, mesh = {Humans ; *Toothpastes/pharmacology ; Female ; *Microbiota/drug effects ; Male ; Adult ; *Dental Plaque/microbiology/drug therapy ; Double-Blind Method ; Middle Aged ; *Citrates/pharmacology ; *Zinc Compounds/pharmacology ; Young Adult ; Bacteria/classification/genetics/drug effects ; }, abstract = {The oral microbiome is a diverse community of microbes residing on all oral surfaces. A balanced oral microbiome is associated with good oral health, and disruption can result in imbalance associated with diseases including gingivitis and dental caries. It is important, therefore, to understand how daily use of oral hygiene products impacts the microbiome. Composition and activity of dental plaque microbiome from 115 participants was analysed after brushing with one of two toothpastes, one containing zinc citrate trihydrate and the other a control toothpaste, in a parallel design. Each participant brushed twice daily for 6-weeks, with samples collected at baseline, 2 and 6-weeks. Metataxonomic analysis demonstrated changes in bacterial communities with use of the zinc toothpaste compared to the control product at community and species level. Increases at the species level were observed for taxa from the genus Veillonella with decrease in a taxon from the genus Fusobacterium for the zinc toothpaste. Analysis of microbiome function based on predicted metagenomic and metatranscriptomic analysis show that use of the zinc toothpaste is associated with an in-vivo reduction in glycolysis, consistent with the mode of action of zinc and, increases in processes linked to gum-health (lysine biosynthesis), and to whole-body health (nitrate reduction). Our findings provide the first understanding of the beneficial modulation of microbiome composition and function by zinc-containing toothpaste in-vivo for oral care benefits.}, }
@article {pmid40057258, year = {2025}, author = {Ragone, P and Parodi, C and Tomasini, N and Ramos, F and Uncos, A and Brandán, CP}, title = {The interplay between Trypanosoma cruzi and the microbiome of Triatoma infestans: Implications for the host's immune response.}, journal = {Acta tropica}, volume = {264}, number = {}, pages = {107577}, doi = {10.1016/j.actatropica.2025.107577}, pmid = {40057258}, issn = {1873-6254}, mesh = {Animals ; *Triatoma/microbiology/parasitology/immunology ; *Trypanosoma cruzi/immunology ; Feces/microbiology/parasitology ; Mice, Inbred C57BL ; Mice ; *Chagas Disease/immunology/parasitology ; RNA, Ribosomal, 16S/genetics ; Cytokines ; Female ; Disease Models, Animal ; *Microbiota ; Parasite Load ; Metagenomics ; Immunoglobulin G/blood ; }, abstract = {The infection dynamics of Trypanosoma cruzi is shaped by the parasite's genetics and interactions with host and vector factors. While most studies in the area use axenic parasite cultures devoid of insect fecal components, this study is focused on the immune response and the parasite loads generated after the interaction of T. cruzi with feces from Triatoma infestans in a murine model. First, using metagenomics, we analyzed the microbiota of infected and uninfected feces. Illumina sequencing of the 16S rRNA gene (V3-V4 region) revealed a predominance of the genus Arsenophonus in infected feces and of Enterococcus in uninfected ones. C57BL/6J mice inoculated with T. cruzi infected feces, displayed distinct immune responses compared to those inoculated with culture-derived metacyclic trypomastigotes alone, with lower levels of pro-inflammatory cytokines (IFN-ɣ, TNF-α) and higher amounts of IL-10, suggesting a regulatory response. Besides, total anti-T. cruzi IgG levels remained similar among groups, but IgG1 and IgG2c were reduced in the T. cruzi infected feces group, indicating a balanced Th1/Th2 response. Notably, mice inoculated with T. cruzi infected feces demonstrated significantly reduced blood and muscle parasite loads, potentially limiting inflammation and parasite dissemination. These findings highlight the possible role of vector fecal microbiota in shaping immune responses and influencing disease outcomes during natural T. cruzi infections.}, }
@article {pmid40056814, year = {2025}, author = {Yasemi, M and Jalali, A and Asadzadeh, M and Komijani, M}, title = {Organophosphate pesticides and their potential in the change of microbial population and frequency of antibiotic resistance genes in aquatic environments.}, journal = {Chemosphere}, volume = {376}, number = {}, pages = {144296}, doi = {10.1016/j.chemosphere.2025.144296}, pmid = {40056814}, issn = {1879-1298}, mesh = {*Pesticides/analysis/toxicity ; *Water Pollutants, Chemical/analysis/toxicity ; *Drug Resistance, Microbial/genetics ; *Organophosphates/analysis/toxicity ; Bacteria/genetics/drug effects ; Wetlands ; Lakes/microbiology/chemistry ; Genes, Bacterial ; Metals, Heavy/analysis/toxicity ; Water Microbiology ; Microbiota/drug effects ; }, abstract = {Heavy metals (HMs) and pesticides disrupt aquatic biodiversity and microbial communities, contributing to antibiotic resistance via cross-resistance and co-selection mechanisms. This study investigates the relationship between organophosphorus pesticides (OPs), HMs, microbial diversity, and antibiotic resistance genes (ARGs) in eight lakes and wetlands. Microbial communities were analyzed via metagenomics methods, and data were processed using CLC Genomics Workbench 22. ARGs, including tetA, tetB, qnrA, qnrS, CIT, Fox, KPC, CTX-M1, DHA, GES, OXA, IMP, VEB, NDM1, SHV, TEM, CTX-M, PER, and MOX, were identified through polymerase chain reaction (PCR). Element concentrations and pesticide were quantified using inductively coupled plasma mass spectrometry and gas chromatography-mass spectrometry, respectively. The results indicate that environmental elements and pesticides significantly influence microbial diversity. Proteobacteria (Gamma, Beta, Alpha) dominate over other bacteria in all locations. β-Lactamase resistance genes have a significant positive correlations with the concentrations of boron, iron, lithium, magnesium, sodium, and phosphorus (P-value<0.05). Positive correlations between phosphorus, iron, and beta-lactamase genes suggest that higher concentrations of these elements may increase resistance likelihood by promoting resistant bacterial growth or facilitating gene transfer. Additionally, tetA and tetB exhibited a significant positive correlation with parathion concentration. The results showed that OPs and HMs increase antibiotic resistance by causing gene mutations, altering gene expression, and promoting horizontal gene transfer, resulting in multidrug-resistant strains. This highlights the need for monitoring these pollutants as they affect microbial diversity and accelerate antibiotic resistance. Targeted measures, such as bioremediation and pollution control, are essential to mitigate risks to the environment and public health.}, }
@article {pmid40056781, year = {2025}, author = {Chen, H and Li, J and Wu, Y and Li, Y and Zheng, S and Wu, Y and Xuan, R and Wu, L and Miao, J and Wang, Y and Tan, H and Zhou, J and Huang, J and Yan, X}, title = {Structural characteristics of intestinal microbiota of domestic ducks with different body sizes.}, journal = {Poultry science}, volume = {104}, number = {4}, pages = {104930}, pmid = {40056781}, issn = {1525-3171}, mesh = {Animals ; *Ducks/microbiology/anatomy &amp; histology/physiology ; *Gastrointestinal Microbiome ; RNA, Ribosomal, 16S/analysis ; *Body Size ; *Bacteria/classification/isolation &amp; purification/genetics ; Feces/microbiology ; Male ; }, abstract = {Domestic ducks are economically important agricultural animals, and their body size is a crucial economic trait. The intestinal flora plays a pivotal role in influencing body metabolism, growth, and development. Currently, no literature is available on the potential effect of the intestinal flora of domestic ducks on body size. This study used 16S rRNA sequencing technology to investigate the fecal microbiota of 229 individuals reared under identical feeding conditions. The findings revealed that partridge ducks with large body sizes (LBS) exhibited a higher level of intestinal microbial diversity than ducks with small body sizes (SBS). Notably, the gut microbiota composition of SBS displayed significantly elevated proportions of Streptococcus, Rothia, and Psychrobacter compared to their counterparts with LBS. Conversely, Lactobacillus was significantly more abundant in LBS. Jeotgalibaca and Psychrobacter were identified as key biomarkers of SBS, whereas Lactobacillus and Bacteroides were predominant biomarkers of LBS. Functional predictions based on intestinal microbiota indicated discernible differences among different body types, particularly evident in non- partridge ducks. The present study investigated the correlation between the intestinal microbiota and body size of domestic ducks, aiming to provide practical insights for the production management of domestic duck farming.}, }
@article {pmid40056745, year = {2025}, author = {Zhu, S and Mao, H and Yang, X and Zhao, W and Sheng, L and Sun, S and Du, X}, title = {Resilience mechanisms of rhizosphere microorganisms in lead-zinc tailings: Metagenomic insights into heavy metal resistance.}, journal = {Ecotoxicology and environmental safety}, volume = {292}, number = {}, pages = {117956}, doi = {10.1016/j.ecoenv.2025.117956}, pmid = {40056745}, issn = {1090-2414}, mesh = {*Rhizosphere ; *Lead/toxicity ; *Zinc/toxicity ; *Soil Microbiology ; *Soil Pollutants/toxicity ; *Metals, Heavy/toxicity ; Mining ; *Bacteria/genetics/drug effects ; Metagenomics ; }, abstract = {This study investigates the impact of heavy metal contamination in lead-zinc tailings on plant and soil microbial communities, focusing on the resilience mechanisms of rhizosphere microorganisms in these extreme environments. Utilizing metagenomic techniques, we identified a significant association between Coriaria nepalensis Wall. rhizosphere microbial communities and metal(loid) resistance genes. Our results reveal a notable diversity and abundance of bacteria within the rhizosphere of tailings, primarily consisting of Proteobacteria, Actinobacteria, and Chloroflexi. The presence of metal-resistant bacterial taxa, including Afipia, Bradyrhizobium, Sphingomonas, and Miltoncostaea, indicates specific evolutionary adaptations to metal-rich, nutrient-deficient environments. Elevated expression of resistance genes such as znuD, zntA, pbrB, and pbrT underscores the microorganisms' ability to endure these harsh conditions. These resistance genes are crucial for maintaining biodiversity, ecosystem stability, and adaptability. Our findings enhance the understanding of interactions between heavy metal contamination, microbial community structure, and resistance gene dynamics in lead-zinc tailings. Additionally, this research provides a theoretical and practical foundation for employing plant-microbial synergies in the in-situ remediation of contaminated sites.}, }
@article {pmid40056517, year = {2025}, author = {Choonut, A and Wongfaed, N and Wongthong, L and Poolpol, A and Chaikitkaew, S and Sittijunda, S and Reungsang, A}, title = {Microbial degradation of polypropylene microplastics and concomitant polyhydroxybutyrate production: An integrated bioremediation approach with metagenomic insights.}, journal = {Journal of hazardous materials}, volume = {490}, number = {}, pages = {137806}, doi = {10.1016/j.jhazmat.2025.137806}, pmid = {40056517}, issn = {1873-3336}, mesh = {*Polypropylenes/metabolism ; Biodegradation, Environmental ; *Microplastics/metabolism ; *Hydroxybutyrates/metabolism ; Microbial Consortia ; Metagenomics ; Bacteria/metabolism/genetics ; *Polyesters/metabolism ; Polyhydroxybutyrates ; }, abstract = {The persistence of plastics, particularly polypropylene (PP), and their conversion into microplastics (MPs), specifically PP-MPs, have emerged as serious ecological threats to soil and aquatic environments. In the present study, we aimed to isolate a microbial consortium capable of degrading PP-MPs. The results revealed that three microbial consortia (CPP-KKU1, CPP-KKU2, and CPP-KKU3) exhibited the ability to degrade PP-MPs, achieving weight losses ranging from 11.6 ± 0.2 % to 17.8 ± 0.5 % after 30 days. Fourier transform infrared (FTIR) spectroscopy analysis confirmed the degradation through oxidation, as evidenced by the presence of new functional groups (-OH and -C=O). In particular, CPP-KKU3 showed the highest degradation efficiency, with scanning electron microscopy (SEM) analysis revealing surface cracking after treatment. Additionally, gas chromatography-mass spectrometry (GC-MS) analysis identified various intermediate compounds, including heterocyclic aromatic compounds, phenyl groups, methylthio derivatives, and ethoxycarbonyl derivatives, indicating complex biochemical processes that were likely mediated by microbial enzymes. Furthermore, polyhydroxybutyrate (PHB) production by these consortia was also investigated. The result showed that both CPP-KKU2 and CPP-KKU3 successfully produced PHB, with CPP-KKU3 demonstrating superior performance in terms of PP-MP degradation and PHB production. Metagenomic analysis of CPP-KKU3 revealed abundant carbohydrate-active enzymes (CAZymes), particularly glycosyl transferases and glycoside hydrolases, which are associated with MP digestion. This study presents a promising bioremediation approach that addresses plastic waste degradation and sustainable bioplastic production, offering a potential solution for environmental plastic pollution.}, }
@article {pmid40056186, year = {2025}, author = {Chen, XX and Ju, Q and Qiu, D and Zhou, Y and Wang, Y and Zhang, XX and Li, JG and Wang, M and Chang, N and Xu, XR and Zhang, YB and Zhao, T and Wang, K and Zhang, Y and Zhang, J}, title = {Microbial dysbiosis with tryptophan metabolites alteration in lower respiratory tract is associated with clinical responses to anti-PD-1 immunotherapy in advanced non-small cell lung cancer.}, journal = {Cancer immunology, immunotherapy : CII}, volume = {74}, number = {4}, pages = {140}, pmid = {40056186}, issn = {1432-0851}, support = {82103446//National Natural Science Foundation of China/ ; 82273226//National Natural Science Foundation of China/ ; 82473215//National Natural Science Foundation of China/ ; 2020QNRC001//China Association for Science and Technology/ ; 2021LC2115//Fourth Military Medical University/ ; }, mesh = {Humans ; *Carcinoma, Non-Small-Cell Lung/drug therapy/pathology/metabolism/microbiology/immunology ; *Lung Neoplasms/drug therapy/metabolism/pathology/microbiology/immunology ; *Tryptophan/metabolism ; Female ; Male ; *Dysbiosis/metabolism/microbiology ; Middle Aged ; Aged ; Immunotherapy/methods ; *Immune Checkpoint Inhibitors/therapeutic use/pharmacology ; Programmed Cell Death 1 Receptor/antagonists &amp; inhibitors ; Microbiota ; Bronchoalveolar Lavage Fluid/microbiology ; }, abstract = {Lower respiratory tract microbiome constitutes a unique immune microenvironment for advanced non-small cell lung cancer as one of dominant localized microbial components. However, there exists little knowledge on the associations between this regional microbiome and clinical responses to anti-PD-1 immunotherapy from clinical perspectives. Here, we equivalently collected bronchoalveolar lavage fluids from 56 advanced NSCLC participants treated with none (untreated, n = 28) or anti-PD-1 immunotherapy (treated, n = 28), which was further divided into responder (n = 17) and non-responder (n = 11) subgroups according to clinical responses, aiming to compare their microbial discrepancy by performing metagenomic sequencing and targeted metabolic alterations by tryptophan sequencing. Correspondingly, microbial diversities transformed significantly after receiving immunotherapeutic agents, where Gammaproteobacteria and Campylobacter enriched, but Escherichia, Streptococcus, Chlamydia, and Staphylococcus reduced at the genus level, differences of which failed to be achieved among subgroups with various clinical responses (responder or non-responder; LDA > 2, P < 0.05[*]). And the relative abundance of Staphylococcus and Streptomyces was escalated in response subgroup to anti-PD-1 immunotherapy by microbial compositional analysis (as relative abundance ≥ 3%, P < 0.05[*]), no significance of which was achieved among treated and untreated groups. In addition, relative abundances of bacterial tryptophan metabolites and its derivatives were also higher in the responder subgroup, distinctively being associated with divergent genera (VIP > 1, P < 0.05[*]). Our study revealed predictive performance of lower respiratory tract microbiome to antitumoral immunotherapy and further suggested that anti-PD-1 immunotherapy may alter lower respiratory tract microbiome composition and interact with its tryptophan metabolites to regulate therapeutic efficacy in advanced NSCLC, performing as potential biomarkers to prognosis and interventional strategies.}, }
@article {pmid40055835, year = {2025}, author = {Yin, CF and Pan, P and Li, T and Song, X and Xu, Y and Zhou, NY}, title = {The universal accumulation of p-aminophenol during the microbial degradation of analgesic and antipyretic acetaminophen in WWTPs: a novel metagenomic perspective.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {68}, pmid = {40055835}, issn = {2049-2618}, support = {32400079//the National Natural Science Foundation of China/ ; 2024YFA0919000//the National Key R&amp;D Program of China/ ; }, mesh = {*Acetaminophen/metabolism/analysis ; *Antipyretics/metabolism ; Metagenomics/methods ; *Aminophenols/metabolism/analysis ; Biodegradation, Environmental ; *Water Pollutants, Chemical/metabolism/analysis ; *Wastewater/microbiology/chemistry ; China ; Humans ; *Bacteria/metabolism/genetics/classification ; Analgesics/metabolism ; COVID-19 ; Microbiota ; }, abstract = {BACKGROUND: Acetaminophen, a widely used analgesic and antipyretic drug, has become a significant aquatic micro-pollutant due to its extensive global production and increased consumption, particularly during the COVID-19 pandemic. Its high-water solubility leads to its pervasive presence in wastewater treatment plants (WWTPs), posing substantial risks to the environment and human health. Biological treatment is one of the promising approaches to remove such pollutants. Although previous studies have isolated acetaminophen-degrading pure cultures and proposed catabolic pathways, the interactions between microbiotas and acetaminophen, the distribution feature of acetaminophen degradation genes, and the gene-driven fate of acetaminophen in the real-world environment remain largely unexplored.<br><br>RESULTS: Among the water samples from 20 WWTPs across China, acetaminophen was detected from 19 samples at concentrations ranging from 0.06 to 29.20&#xa0;nM. However, p-aminophenol, a more toxic metabolite, was detected in all samples at significantly higher concentrations (23.93 to 108.68&#xa0;nM), indicating the presence of a catabolic bottleneck in WWTPs. Metagenomic analysis from both the above 20 samples and global datasets revealed a consistently higher abundance of initial acetaminophen amidases compared to downstream enzymes, potentially having explained the reason for the bottleneck. Meanwhile, a close correlation between initial amidases and Actinomycetota revealed by genome-based taxonomy suggests a species-dependent degradation pattern. Additionally, a distinct amidase ApaA was characterized by newly isolated Rhodococcus sp. NyZ502 (Actinomycetota), represents a predominant category of amidase in WWTPs. Significant phylogenetic and structural diversity observed among putative amidases suggest versatile acetaminophen hydrolysis potential in WWTPs.<br><br>CONCLUSIONS: This study enhances our understanding of acetaminophen's environmental fate and highlights the possible occurrence of ecological risks driven by imbalanced genes in the process of acetaminophen degradation in global WWTPs. Video Abstract.}, }
@article {pmid40055808, year = {2025}, author = {Avershina, E and Qureshi, AI and Winther-Larsen, HC and Rounge, TB}, title = {Challenges in capturing the mycobiome from shotgun metagenome data: lack of software and databases.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {66}, pmid = {40055808}, issn = {2049-2618}, support = {2022067//Helse S&#xf8;r-&#xd8;st RHF/ ; }, mesh = {*Mycobiome/genetics ; *Software ; *Metagenomics/methods ; Humans ; *Fungi/genetics/classification ; *Metagenome ; *Gastrointestinal Microbiome/genetics ; Computational Biology/methods ; }, abstract = {BACKGROUND: The mycobiome, representing the fungal component of microbial communities, is increasingly acknowledged as an integral part of the gut microbiome. However, research in this area remains relatively limited. The characterization of mycobiome taxa from metagenomic data is heavily reliant on the quality of the software and databases. In this study, we evaluated the feasibility of mycobiome profiling using existing bioinformatics tools on simulated fungal metagenomic data.<br><br>RESULTS: We identified seven tools claiming to perform taxonomic assignment of fungal shotgun metagenomic sequences. One of these was outdated and required substantial modifications of the code to be functional and was thus excluded. To evaluate the accuracy of identification and relative abundance of the remaining tools (Kraken2, MetaPhlAn4, EukDetect, FunOMIC, MiCoP, and HumanMycobiomeScan), we constructed 18 mock communities of varying species richness and abundance levels. The mock communities comprised up to 165 fungal species belonging to the phyla Ascomycota and Basidiomycota, commonly found in gut microbiomes. Of the tools, FunOMIC and HumanMycobiomeScan needed source code modifications to run. Notably, only one species, Candida orthopsilosis, was consistently identified by all tools across all communities where it was included. Increasing community richness improved precision of Kraken2 and the relative abundance accuracy of all tools on species, genus, and family levels. MetaPhlAn4 accurately identified all genera present in the communities and FunOMIC identified most species. The top three tools for overall accuracy in both identification and relative abundance estimation were EukDetect, MiCoP, and FunOMIC, respectively. Adding 90% and 99% bacterial background did not significantly impact these tools' performance. Among the whole genome reference tools (Kraken2, HMS, and MiCoP), MiCoP exhibited the highest accuracy when the same reference database was used.<br><br>CONCLUSION: Our survey of mycobiome-specific software revealed a very limited selection of such tools and their poor robustness due to error-prone software, along with a significant lack of comprehensive databases enabling characterization of the mycobiome. None of the implemented tools fully agreed on the mock community profiles. FunOMIC recognized most of the species, but EukDetect and MiCoP provided predictions that were closest to the correct compositions. The bacterial background did not impact these tools' performance. Video Abstract.}, }
@article {pmid40054445, year = {2025}, author = {Turjeman, S and Rozera, T and Elinav, E and Ianiro, G and Koren, O}, title = {From big data and experimental models to clinical trials: Iterative strategies in microbiome research.}, journal = {Cell}, volume = {188}, number = {5}, pages = {1178-1197}, doi = {10.1016/j.cell.2025.01.038}, pmid = {40054445}, issn = {1097-4172}, mesh = {Humans ; *Microbiota ; *Big Data ; *Clinical Trials as Topic ; Animals ; Metabolomics ; Metagenomics/methods ; }, abstract = {Microbiome research has expanded significantly in the last two decades, yet translating findings into clinical applications remains challenging. This perspective discusses the persistent issue of correlational studies in microbiome research and proposes an iterative method leveraging in silico, in vitro, ex vivo, and in vivo studies toward successful preclinical and clinical trials. The evolution of research methodologies, including the shift from small cohort studies to large-scale, multi-cohort, and even "meta-cohort" analyses, has been facilitated by advancements in sequencing technologies, providing researchers with tools to examine multiple health phenotypes within a single study. The integration of multi-omics approaches-such as metagenomics, metatranscriptomics, metaproteomics, and metabolomics-provides a comprehensive understanding of host-microbe interactions and serves as a robust hypothesis generator for downstream in vitro and in vivo research. These hypotheses must then be rigorously tested, first with proof-of-concept experiments to clarify the causative effects of the microbiota, and then with the goal of deep mechanistic understanding. Only following these two phases can preclinical studies be conducted with the goal of translation into the clinic. We highlight the importance of combining traditional microbiological techniques with big-data approaches, underscoring the necessity of iterative experiments in diverse model systems to enhance the translational potential of microbiome research.}, }
@article {pmid40054424, year = {2025}, author = {Ding, C and Sun, J}, title = {The potential contribution of microbial communities to carbon fixation and nitrogen cycle in the Eastern Indian Ocean.}, journal = {Marine environmental research}, volume = {207}, number = {}, pages = {107056}, doi = {10.1016/j.marenvres.2025.107056}, pmid = {40054424}, issn = {1879-0291}, mesh = {Indian Ocean ; *Carbon Cycle ; *Microbiota ; *Nitrogen Cycle ; Seawater/microbiology ; RNA, Ribosomal, 16S/analysis ; Bacteria ; Nitrogen Fixation ; Metagenomics ; }, abstract = {This study investigated the diversity and metabolic potential of microbial communities in the Eastern Indian Ocean (EIO) through 16S rDNA gene sequencing and metagenomics analyses. Water samples were collected from the surface waters (5 m depth) and 150 m depth layer in the EIO between March 20th and June 6th, 2019. This study reveals microbial-driven biogeochemical dynamics in the oligotrophic Eastern Indian Ocean, where vertically stratified communities (Cyanobacteria/Proteobacteria-dominated surface vs. diversified Proteobacteria at 150 m) and latitudinal diversity gradients reflect nutrient limitations. Metagenomics identified four carbon fixation strategies: the Calvin cycle dominated epipelagic CO2 assimilation, while the 3-hydroxypropionate bicycle showed elevated surface activity, alongside reductive citrate and Wood-Ljungdahl pathways involving novel Actinobacteria. Nitrogen cycling exhibited spatial heterogeneity: nifH-dominated nitrogen fixation in the surface waters, prevalent narGHI nitrate reduction, and divergent nirS/nirK/nosZ distributions tied to nutrient gradients. Proteobacteria and Actinobacteria were key nitrogen fixers, with novel Actinobacteriota diazotrophs expanding known diversity. Elevated nosZ abundance in the Bay of Bengal underscored regional nitrous oxide consumption hotspots. These findings underscore microbial mediation of carbon-nitrogen fluxes in oligotrophic systems, providing genomic insights into ecosystem responses to climate-driven ocean changes.}, }
@article {pmid40053579, year = {2025}, author = {Wöhlbrand, L and Dörries, M and Siani, R and Medrano-Soto, A and Schnaars, V and Schumacher, J and Hilbers, C and Thies, D and Kube, M and Reinhardt, R and Schloter, M and Saier, MH and Winklhofer, M and Rabus, R}, title = {Key role of Desulfobacteraceae in C/S cycles of marine sediments is based on congeneric catabolic-regulatory networks.}, journal = {Science advances}, volume = {11}, number = {10}, pages = {eads5631}, pmid = {40053579}, issn = {2375-2548}, support = {R01 GM077402/GM/NIGMS NIH HHS/United States ; }, mesh = {*Geologic Sediments/microbiology ; *Deltaproteobacteria/genetics/metabolism ; *Gene Regulatory Networks ; *Sulfur/metabolism ; *Carbon Cycle ; *Carbon/metabolism ; Phylogeny ; Metagenome ; Genome, Bacterial ; }, abstract = {Marine sediments are highly bioactive habitats, where sulfate-reducing bacteria contribute substantially to seabed carbon cycling by oxidizing ~77 Tmol Corg year[-1]. This remarkable activity is largely attributable to the deltaproteobacterial family Desulfobacteraceae of complete oxidizers (to CO2), which our biogeography focused meta-analysis verified as cosmopolitan. However, the catabolic/regulatory networks underlying this ecophysiological feat at the thermodynamic limit are essentially unknown. Integrating cultivation-based (80 conditions) proteogenomics of six representative Desulfobacteraceae spp., we identify molecular commonalities explaining the family's environmental relevance and success. Desulfobacteraceae genomes are specifically enriched in substrate uptake, degradation capacities, and regulatory functions including fine-tuned sulfate uptake. Conserved gene arrangements and shared regulatory patterns translate into strikingly similar (sub-)proteome profiles. From 319 proteins, we constructed a meta-network for catabolizing 35 substrates. Therefrom, we defined a Desulfobacteraceae characteristic gene subset, which we found prevalent in metagenomes of organic-rich, marine sediments. These genes are promising targets to advance our mechanistic understanding of Desulfobacteraceae-driven biogeochemical processes in marine sediments and beyond.}, }
@article {pmid40053318, year = {2025}, author = {Nihalani, R and Zola, J and Aluru, S}, title = {Disambiguating a Soft Metagenomic Clustering.}, journal = {Journal of computational biology : a journal of computational molecular cell biology}, volume = {32}, number = {5}, pages = {473-485}, doi = {10.1089/cmb.2024.0825}, pmid = {40053318}, issn = {1557-8666}, mesh = {*Metagenomics/methods ; Animals ; Cluster Analysis ; Rats ; Algorithms ; RNA, Ribosomal, 16S/genetics ; Metagenome ; Computational Biology/methods ; Sequence Analysis, DNA/methods ; Gastrointestinal Microbiome/genetics ; }, abstract = {Clustering is a popular technique used for analyzing amplicon sequencing data in metagenomics. Specifically, it is used to assign sequences (reads) to clusters, each cluster representing a species or a higher level taxonomic unit. Reads from multiple species often sharing subsequences, combined with lack of a perfect similarity measure, make it difficult to correctly assign reads to clusters. Thus, metagenomic clustering methods must either resort to ambiguity, or make the best available choice at each read assignment stage, which could lead to incorrect clusters and potentially cascading errors. In this article, we argue for first generating an ambiguous clustering and then resolving the ambiguities collectively by analyzing the ambiguous clusters. We propose a rigorous formulation of this problem and show that it is NP-Hard. We then propose an efficient heuristic to solve it in practice. We validate our approach on several synthetically generated datasets and two datasets consisting of 16S rDNA sequences from the microbiome of rat guts.}, }
@article {pmid40052570, year = {2025}, author = {Shen, M and Gao, S and Zhu, R and Wang, W and Gao, W and Tao, L and Chen, W and Zhu, X and Yang, Y and Xu, T and Zhao, T and Jiao, N and Zhi, M and Zhu, L}, title = {Multimodal metagenomic analysis reveals microbial InDels as superior biomarkers for pediatric Crohn's disease.}, journal = {Journal of Crohn's &amp; colitis}, volume = {19}, number = {4}, pages = {}, doi = {10.1093/ecco-jcc/jjaf039}, pmid = {40052570}, issn = {1876-4479}, support = {82170542//National Natural Science Foundation of China/ ; 2021YFF0703700/2021YFF0703702//National Key Research and Development Program of China/ ; 2014008//Sun Yat-sen University Clinical Research 5010 Program/ ; 2019ZT08Y464//Guangdong Province "Pearl River Talent Plan" Innovation and Entrepreneurship Team Project/ ; }, mesh = {Humans ; *Crohn Disease/microbiology/diagnosis/genetics ; *Gastrointestinal Microbiome/genetics ; Child ; *Metagenomics/methods ; *INDEL Mutation ; Feces/microbiology ; Female ; Male ; Biomarkers/analysis ; Adolescent ; Machine Learning ; }, abstract = {BACKGROUND AND AIMS: The gut microbiome is closely associated with pediatric Crohn's disease (CD), while the multidimensional microbial signature and their capabilities for distinguishing pediatric CD are underexplored. This study aims to characterize the microbial alterations in pediatric CD and develop a robust classification model.<br><br>METHODS: A total of 1175 fecal metagenomic sequencing samples, predominantly from 3 cohorts of pediatric CD patients, were re-analyzed from raw sequencing data using uniform process pipelines to obtain multidimensional microbial alterations in pediatric CD, including taxonomic profiles, functional profiles, and multi-type genetic variants. Random forest algorithms were used to construct classification models after comparing multiple machine learning algorithms.<br><br>RESULTS: We found pediatric CD samples exhibited reduced microbial diversity and unique microbial characteristics. Pronounced abundance differences in 45 species and 1357 KEGG orthology genes. Particularly, Enterocloster bolteae emerged as a pivotal pediatric CD-associated species. Additionally, we identified a vast amount of microbial genetic variants linked to pediatric CD, including 192 structural variants, 1256 insertions/deletions (InDels), and 3567 single nucleotide variants, with a considerable portion of these variants located in non-genic regions. The InDel-based model outperformed other predictive models against multidimensional microbial signatures, achieving an area under the ROC curve (AUC) of 0.982. The robustness and disease specificity were further confirmed in an independent CD cohort (AUC&#x2005;=&#x2005;0.996) and 5 other microbiome-associated pediatric cohorts.<br><br>CONCLUSIONS: Our study provided a comprehensive landscape of microbial alterations in pediatric CD and introduced a highly effective diagnostic model rooted in microbial InDels, which contributes to the development of noninvasive diagnostic tools and targeted therapies.}, }
@article {pmid40052474, year = {2025}, author = {Bamigbade, GB and Abdin, M and Subhash, A and Arachchi, MP and Ullah, N and Gan, RY and Ali, A and Kamal-Eldin, A and Ayyash, M}, title = {Plant polysaccharide-capped nanoparticles: A sustainable approach to modulate gut microbiota and advance functional food applications.}, journal = {Comprehensive reviews in food science and food safety}, volume = {24}, number = {2}, pages = {e70156}, pmid = {40052474}, issn = {1541-4337}, support = {//United Arab Emirates University/ ; }, mesh = {*Gastrointestinal Microbiome/drug effects ; *Polysaccharides/chemistry ; *Nanoparticles/chemistry ; Humans ; *Functional Food ; }, abstract = {Plant-derived polysaccharides have emerged as sustainable biopolymers for fabricating nanoparticles (polysaccharide-based nanomaterials [PS-NPs]), presenting unique opportunities to enhance food functionality and human health. PS-NPs exhibit exceptional biocompatibility, biodegradability, and structural versatility, enabling their integration into functional foods to positively influence gut microbiota. This review explores the mechanisms of PS-NPs interaction with gut microbiota, highlighting their ability to promote beneficial microbial populations, such as Lactobacilli and Bifidobacteria, and stimulate the production of short-chain fatty acids. Key synthesis and stabilization methods of PS-NPs are discussed, focusing on their role in improving bioavailability, stability, and gastrointestinal delivery of bioactive compounds in food systems. The potential of PS-NPs to address challenges in food science, including enhancing nutrient absorption, mitigating intestinal dysbiosis, and supporting sustainable food production through innovative nanotechnology, is critically evaluated. Barriers such as enzymatic degradation and physicochemical stability are analyzed, alongside strategies to optimize their functionality within complex food matrices. The integration of PS-NPs in food systems offers a novel approach to modulate gut microbiota, improve intestinal health, and drive the development of next-generation functional foods. Future research should focus on bridging knowledge gaps in metagenomic and metabolomic profiling of PS-NPs, optimizing their design for diverse applications, and advancing their role in sustainable and health-promoting food innovations.}, }
@article {pmid40052450, year = {2025}, author = {Qian, Z and Chen, S and Liao, X and Xie, J and Xu, Y and Zhong, H and Ou, L and Zuo, X and Xu, X and Peng, J and Wu, J and Cai, S}, title = {Decreased intestinal abundance of Akkermansia muciniphila is associated with metabolic disorders among people living with HIV.}, journal = {Annals of medicine}, volume = {57}, number = {1}, pages = {2474730}, pmid = {40052450}, issn = {1365-2060}, mesh = {Humans ; *HIV Infections/drug therapy/complications/microbiology ; Male ; *Gastrointestinal Microbiome/genetics ; Female ; Middle Aged ; Adult ; Prospective Studies ; *Akkermansia/isolation &amp; purification ; *Non-alcoholic Fatty Liver Disease/microbiology ; Feces/microbiology ; *Metabolic Diseases/microbiology ; Metagenomics ; }, abstract = {BACKGROUND: Previous studies have shown changes in gut microbiota after human immunodeficiency virus (HIV) infection, but there is limited research linking the gut microbiota of people living with HIV (PLWHIV) to metabolic diseases.<br><br>METHODS: A total of 103 PLWHIV were followed for 48&#x2009;weeks of anti-retroviral therapy (ART), with demographic and clinical data collected. Gut microbiome analysis was conducted using metagenomic sequencing of fecal samples from 12 individuals. Nonalcoholic fatty liver disease (NAFLD) was diagnosed based on controlled attenuation parameter (CAP) values of 238&#x2009;dB/m from liver fibro-scans. Participants were divided based on the presence of metabolic disorders, including NAFLD, overweight, and hyperlipidemia. Akkermansia abundance in stool samples was measured using RT-qPCR, and Pearson correlation and logistic regression were applied for analysis.<br><br>RESULTS: Metagenomic sequencing revealed a significant decline in gut Akkermansia abundance in PLWHIV with NAFLD. STAMP analysis of public datasets confirmed this decline after HIV infection, while KEGG pathway analysis identified enrichment of metabolism-related genes. A prospective cohort study with 103 PLWHIV followed for 48&#x2009;weeks validated these findings. Akkermansia abundance was significantly lower in participants with NAFLD, overweight, and hyperlipidemia at baseline, and it emerged as an independent predictor of NAFLD and overweight. Negative correlations were observed between Akkermansia abundance and both CAP values and body mass index (BMI) at baseline and at week 48. At the 48-week follow-up, Akkermansia remained a predictive marker for NAFLD.<br><br>CONCLUSIONS: Akkermansia abundance was reduced in PLWHIV with metabolic disorders and served as a predictive biomarker for NAFLD progression over 48&#x2009;weeks of ART.}, }
@article {pmid40052334, year = {2025}, author = {Lu, Y and Dong, Y and Zhang, M and Mao, L}, title = {Genome and Metagenome Skimming: Future Sequencing Methods for Environmental DNA (eDNA) Studies.}, journal = {Molecular ecology resources}, volume = {}, number = {}, pages = {e14095}, doi = {10.1111/1755-0998.14095}, pmid = {40052334}, issn = {1755-0998}, support = {2023YFF0805800//the National Key Research and Development Program of China/ ; BE2022792//Jiangsu Social Development Program/ ; }, abstract = {Genome skimming (GS), also referred to as low-coverage shotgun sequencing, is an efficient and cost-effective sequencing method that targets high-copy regions in genomes. It is most commonly used for species identification, phylogenetic analysis and expansion of reference libraries. GS can be applied to single species or composite DNA samples representing multiple species; the latter is termed metagenome skimming (MGS). GS/MGS shows promise as an effective approach for environmental DNA (eDNA) studies, but it is currently limited to ancient sedimentary samples. There is the potential to expand this methodology to other eDNA sources, including water, soil and airborne samples. In this paper, we introduce GS/MGS and briefly review its current applications. We also discuss the potential benefits and challenges of using GS/MGS to assay eDNA. eDNA GS/MGS is a promising technology that could broaden eDNA studies if some methodological challenges can be addressed.}, }
@article {pmid40050500, year = {2025}, author = {Dave, M and Tattar, R}, title = {Antimicrobial resistance genes in the oral microbiome.}, journal = {Evidence-based dentistry}, volume = {26}, number = {1}, pages = {42-43}, pmid = {40050500}, issn = {1476-5446}, mesh = {Humans ; Anti-Bacterial Agents/pharmacology ; Bacteria/genetics/drug effects ; *Drug Resistance, Bacterial/genetics ; *Genes, Bacterial ; High-Throughput Nucleotide Sequencing ; *Microbiota/genetics ; *Mouth/microbiology ; Polymerase Chain Reaction ; Systematic Reviews as Topic ; }, abstract = {A COMMENTARY ON: Sukumar S, Rahmanyar Z, El Jurf H Q et al. Mapping the oral resistome: a systematic review. J Med Microbiol 2024; https://doi.org/10.1099/jmm.0.001866 .<br><br>DESIGN: This systematic review, without meta-analysis, aimed to map the oral resistome by analysing clinical studies that detected bacterial antimicrobial resistance genes (ARGs) in the oral cavity using molecular techniques.<br><br>DATA SOURCES: The researchers used Medline, Embase, Web of Science, CINAHL and Scopus databases from January 2015 to August 2023.<br><br>STUDY SELECTION: This systematic review included cross-sectional or longitudinal clinical studies that detected ARGs using molecular techniques; specifically polymerase chain reaction (PCR) or next-generation sequencing (NGS) metagenomics&#xa0;for samples from the oral cavity (saliva, gingival biofilm, pulp, or oral mucosa). Studies were excluded if they were in vitro or animal studies, literature reviews and not focused on ARG detection.<br><br>DATA EXTRACTION AND SYNTHESIS: Five reviewers independently screened titles and abstracts based on inclusion criteria. Full-text reports were then independently assessed for eligibility by three reviewers. Extracted data encompassed publication details, sample size, country, molecular methods used, number of ARGs detected, participants' health status, antibiotic exposure, and sample location within the oral cavity.<br><br>RESULTS: Out of 580 initially identified studies, 15 met the inclusion criteria. These studies, published between 2015 and 2023 from 12 different countries, employed either PCR (n&#x2009;=&#x2009;10) or NGS metagenomics (n&#x2009;=&#x2009;5) to detect ARGs from a pool of 1486 participants (1 study did not report on the number of participants). PCR-based studies identified an average of 7 ARGs (range 1-20), while NGS studies identified an average of 34 ARGs (range 7-70). In total, 159 unique ARGs conferring resistance to 22 antibiotic classes were identified across six regions of the oral cavity. The supragingival biofilm and saliva exhibited the highest richness of ARGs, defined by the number of unique ARGs detected. Genes conferring resistance to 19 antibiotic classes were present in the supragingival biofilm. Notably, 49 ARGs, including tetracycline and macrolide resistance genes, were found across all sampled locations, indicating a widespread distribution within the oral cavity. Thirteen studies reported on bacterial species associated with ARGs. NGS studies identified a mean of 65 ARG-carrying bacterial species, compared to a mean of 4 species in PCR studies. Specifically, 25 ARG-carrying species were identified in PCR studies, while NGS studies identified 177 species. Four studies reported ARGs associated with streptococcal species implicated in distant-site infections such as infective endocarditis. ESKAPE pathogens (group of highly virulent multidrug-resistant bacteria) were detected with ARGs in various oral sites using both PCR and NGS methods. Comparisons between healthy and diseased states revealed that a healthy oral microbiome harbours a more diverse resistome at the antibiotic class level. The supragingival resistome demonstrated the richest composition in both health and disease, with tetracycline ARGs predominating in the supragingival and saliva resistomes in cases of dental caries.<br><br>CONCLUSIONS: The analysis of the oral resistome from these 15 studies identified three ARGs present in all sites of the oral cavity, suggesting the presence of a core resistome. NGS studies provided greater insights compared to PCR studies; however, the overall research base is limited. Further comprehensive studies are necessary to fully map the oral resistome.}, }
@article {pmid40050382, year = {2025}, author = {Liu, C and Wang, H and Wang, Z and Liang, L and Li, Y and Liu, D and Lu, Q}, title = {Distinct assembly processes of intestinal and non-intestinal microbes of bark beetles from clues of metagenomic insights.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {7910}, pmid = {40050382}, issn = {2045-2322}, support = {32230071//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; *Coleoptera/microbiology ; *Bacteria/genetics/classification ; *Weevils/microbiology ; Symbiosis ; Fungi/genetics/classification ; *Metagenome ; *Microbiota ; }, abstract = {Ips (Curculionidae: Scolytinae) bark beetles (BBs) are ecologically and economically devastating coniferous pests in the Northern Hemisphere. Although the microbial diversity associated with these beetles has been well studied, mechanisms of community assembly and the functional roles of key microbes remain poorly understood. This study investigates the microbial community structures and functions in both intestinal and non-intestinal environments of five Ips BBs using a metagenomic approach. The findings reveal similar microbial community compositions, though the α-diversity of dominant taxa differs between intestinal and non-intestinal environments due to the variability in bark beetle species, host trees, and habitats. Intestinal microbial communities are predominantly shaped homogenizing dispersal (HD) and undominated processes (UP), whereas non-intestinal microbial communities are primarily driven by heterogeneous selection (HS). Functional analysis shows that genes and enzymes associated with steroid biosynthesis and oxidative phosphorylation are primarily found in non-intestinal fungal symbionts Ogataea, Wickerhamomyce, Ophiostoma, and Ceratocystis of Ips species. Genes and enzymes involved in degrading terpenoids, phenolic compounds, and polysaccharides are predominately found in the intestinal Acinetobacter, Erwinia, and Serratia. This study provides valuable and in-depth insights into the symbiotic relationships between Ips BBs and their microbial partners, enhancing our understanding of insect-microbe coevolution and suggesting new strategies for pest management.}, }
@article {pmid40049896, year = {2025}, author = {Yu, Q and Hu, X and Qian, Y and Wang, Y and Shi, C and Qi, R and Heděnec, P and Nan, Z and Li, H}, title = {Virus communities rather than bacterial communities contribute more on nutrient pool in polluted aquatic environment.}, journal = {Journal of environmental sciences (China)}, volume = {154}, number = {}, pages = {550-562}, doi = {10.1016/j.jes.2024.08.026}, pmid = {40049896}, issn = {1001-0742}, mesh = {Bacteria ; *Viruses/classification ; Nitrogen/analysis ; Phosphorus/analysis ; *Water Microbiology ; *Environmental Monitoring ; RNA, Ribosomal, 16S ; Animals ; Sulfur/analysis ; Nutrients/analysis ; Water Pollutants, Chemical/analysis ; Microbiota ; }, abstract = {The degradation of animal carcasses can lead to rapid waste release (e.g., pathogenic bacteria, viruses, prions, or parasites) and also result in nutrient accumulation in the surrounding environment. However, how viral profile responds and influences nutrient pool (carbon (C), nitrogen (N), phosphorus (P) and sulfur (S)) in polluted water caused by animal carcass decomposition had not been explored. Here, we combined metagenomic analysis, 16S rRNA gene sequencing and water physicochemical assessment to explore the response of viral communities under different temperatures (23 °C, 26 °C, 29 °C, 32 °C, and 35 °C) in water polluted by cadaver, as well as compare the contribution of viral/bacterial communities on water nutrient pool. We found that a total of 15,240 viral species were classified and mainly consisted of Siphoviridae. Both temperature and carrion reduced the viral diversity and abundance. Only a small portion of the viruses (∼8.8 %) had significant negative correlations with temperature, while most were not sensitive. Our results revealed that the viruses had lager contribution on nutrient pool than bacteria. Besides, viral-related functional genes involved in C, N, P and S cycling. These functional genes declined during carcass decomposition and covered part of the central nutrient cycle metabolism (including carbon sugar transformation, denitrification, P mineralization and extracelluar sulfate transfer, etc.). Our result implies that human regulation of virus communities may be more important than bacterial communities in regulating and managing polluted water quality and nutrition.}, }
@article {pmid40049354, year = {2025}, author = {Sun, RZ and Pan, Y and Wang, J and Gao, T and Yu, HQ and Wang, J}, title = {Metabolic and ecological responses of denitrifying consortia to different carbon source strategies under fluctuating C/N conditions.}, journal = {Environmental research}, volume = {274}, number = {}, pages = {121292}, doi = {10.1016/j.envres.2025.121292}, pmid = {40049354}, issn = {1096-0953}, mesh = {*Denitrification ; *Carbon/metabolism ; *Nitrogen/metabolism ; *Microbial Consortia ; Wastewater/microbiology ; Bioreactors/microbiology ; Bacteria/metabolism ; Waste Disposal, Fluid/methods ; }, abstract = {Frequent fluctuations in the carbon-to-nitrogen (C/N) ratio of urban wastewater influent can undermine denitrification performance, posing challenges for stable nitrogen removal. Although supplying additional carbon sources is a recognized strategy to mitigate these issues, the underlying microbial interactions and metabolic reconfigurations triggered by changing C/N ratios remain incompletely understood. Here, we employed methanol, glycerol, sodium acetate, and glucose in long-term denitrification reactors and integrated denitrification kinetics, 16S rRNA gene amplicon sequencing, metagenomic binning, and metabolic modeling to elucidate how these systems respond to a declining C/N ratio. Our results show that lower C/N ratios diminished denitrification efficiency in all treatments, with each carbon source eliciting distinct shifts in microbial assemblages. Fluctuations in the C/N ratio determine the extent of directional selection of microbial communities based on carbon source metabolism and induce significant changes in non-dominant microorganisms. Throughout the process, the synthesis potential of PHA is closely linked to the system's ability to withstand fluctuations. Notably, metabolic modeling indicated that heightened tricarboxylic acid (TCA) cycle activity in the methanol- and glucose-fed communities was associated with suboptimal nitrogen removal. These findings offer novel insights into the metabolic and ecological mechanisms governing carbon source-driven denitrification under fluctuating C/N conditions, providing a valuable framework for optimizing nitrogen removal in urban wastewater treatment systems.}, }
@article {pmid40048849, year = {2025}, author = {Bargheet, A and Noordzij, HT and Ponsero, AJ and Jian, C and Korpela, K and Valles-Colomer, M and Debelius, J and Kurilshikov, A and Pettersen, VK}, title = {Dynamics of gut resistome and mobilome in early life: a meta-analysis.}, journal = {EBioMedicine}, volume = {114}, number = {}, pages = {105630}, pmid = {40048849}, issn = {2352-3964}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Infant ; Metagenomics/methods ; Infant, Newborn ; Anti-Bacterial Agents/pharmacology/therapeutic use ; Metagenome ; Female ; Interspersed Repetitive Sequences ; *Drug Resistance, Bacterial/genetics ; Computational Biology/methods ; }, abstract = {BACKGROUND: The gut microbiota of infants harbours a higher proportion of antibiotic resistance genes (ARGs) compared to adults, even in infants never exposed to antibiotics. Our study aims to elucidate this phenomenon by analysing how different perinatal factors influence the presence of ARGs, mobile genetic elements (MGEs), and their bacterial hosts in the infant gut.<br><br>METHODS: We searched MEDLINE and Embase up to April 3rd, 2023, for studies reporting infant cohorts with shotgun metagenomic sequencing of stool samples. The systematic search identified 14 longitudinal infant cohorts from 10 countries across three continents, featuring publicly available sequencing data with corresponding metadata. For subsequent integrative bioinformatic analyses, we used 3981 high-quality metagenomic samples from 1270 infants and 415 mothers.<br><br>FINDINGS: We identified distinct trajectories of the resistome and mobilome associated with birth mode, gestational age, antibiotic use, and geographical location. Geographical variation was exemplified by differences between cohorts from Europe, Southern Africa, and Northern America, which showed variation in both diversity and abundance of ARGs. On the other hand, we did not detect a significant impact of breastfeeding on the infants' gut resistome. More than half of detected ARGs co-localised with plasmids in key bacterial hosts, such as Escherichia coli and Enterococcus faecalis. These ARG-associated plasmids were gradually lost during infancy. We also demonstrate that E.&#xa0;coli role as a primary modulator of the infant gut resistome and mobilome is facilitated by its increased abundance and strain diversity compared to adults.<br><br>INTERPRETATION: Birth mode, gestational age, antibiotic exposure, and geographical location significantly influence the development of the infant gut resistome and mobilome. A reduction in E. coli relative abundance over time appears as a key factor driving the decrease in both resistome and plasmid relative abundance as infants grow.<br><br>FUNDING: Centre for Advanced Study in Oslo, Norway. Centre for New Antibacterial Strategies through the Troms&#xf8; Research Foundation, Norway.}, }
@article {pmid40047424, year = {2025}, author = {Li, N and Li, M and Zhang, H and Bai, Z and Fei, Z and Dong, Y and Zhang, X and Xiao, P and Sun, X and Zhou, D}, title = {Effects of post-adulthood environmental hygiene improvement on gut microbiota and immune tolerance in mice.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {4}, pages = {e0247724}, pmid = {40047424}, issn = {1098-5336}, support = {31770540//The Natural Science Foundation of China/ ; BE2018663//The Key Research Program of Jiangsu/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; *Immune Tolerance ; *Hygiene ; Specific Pathogen-Free Organisms ; Feces/microbiology ; Male ; Bacteria/classification/genetics/isolation &amp; purification ; Housing, Animal ; }, abstract = {UNLABELLED: Changes in diet, cleanliness, stress, and exercise patterns may contribute to the disappearance of various gut microbes in humans who relocate to developed countries from developing countries. To explore the impact of environmental cleanliness on the gut microbiota, adult mice housed in a general animal room were divided into three groups. The control group was subjected to an unchanged living environment, SPF mice were moved to a specific pathogen-free (SPF) animal room with higher environmental cleanliness, and SPFL (specific pathogen-free specific with a fecal leakage grid) mice were moved to the SPF animal room and reared in cages with the function of preventing mice from eating feces as much as possible. Metagenome sequencing results showed that the gut microbial diversity decreased after the environmental change, accompanied by a substantial loss in gut microbiota, including genera known to have protective effects against allergies and those involved in short-chain fatty acid production. Additionally, the abundance of functional genes involved in short-chain fatty acid metabolism, amino acid synthesis, vitamin metabolism, flagellar assembly, and bacterial chemotaxis decreased. The environmental hygiene improvement also resulted in significant increases in total serum IgE, IL-4, IL-5, and IL-13 levels in mice with artificially induced chronic inflammatory dermatosis. Compared with SPF mice, preventing mice from eating feces as much as possible decreased the gut microbial diversity but did not markedly change functional gene expression or total serum cytokine levels.<br><br>IMPORTANCE: Research has indicated that the human gut microbial diversity gradually decreases, while the prevalence of allergic diseases increases after movement from developing countries to developed countries. A healthy gut microbiota is necessary for proper human immune function. Movement from undeveloped to developed regions is often accompanied by an increase in environmental cleanliness. However, whether changes in environmental cleanliness are an important factor contributing to the decreased gut microbial diversity and increased prevalence of allergic diseases has not been reported. This study demonstrates the impact of increased environmental cleanliness on gut microbiota and susceptibility to allergic diseases and contributes to a better understanding of the increased incidence rate of various chronic diseases.}, }
@article {pmid40047330, year = {2025}, author = {Gong, S and Li, M and Gao, J and Huang, S and Song, W and Sun, L}, title = {Cucumaria frondosa intestines and ovum hydrolysates intervention ameliorates the symptoms of dextran sulfate sodium-induced colitis by modulating gut microbiota and its metabolites.}, journal = {Journal of food science}, volume = {90}, number = {3}, pages = {e70106}, doi = {10.1111/1750-3841.70106}, pmid = {40047330}, issn = {1750-3841}, support = {42106111//National Natural Science Foundation of China/ ; ZR2021QD030//Natural Science Foundation of Shandong Province/ ; NYJG202303//Fund of Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, China/ ; 2023KJ241//Program for Scientific Research Innovation Team of Young Scholar in Colleges and Universities of Shandong Province/ ; R20076//Doctoral Startup Project of Guangdong Ocean University funded by W.S/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Dextran Sulfate/adverse effects ; *Colitis/chemically induced/drug therapy/metabolism/microbiology ; Mice ; Male ; Disease Models, Animal ; Mice, Inbred C57BL ; Cytokines/metabolism ; Colon/metabolism/pathology/drug effects ; Intestines ; *Protein Hydrolysates ; }, abstract = {Colitis, a troublesome inflammatory disease that significantly impacts daily life, has garnered considerable attention in recent times. Protolysates play a crucial role in the treatment of colitis, and the intestines and ovum of Cucumaria frondosa represent a readily available source of these hydrolysates. However, the effects of C. frondosa intestines and ovum hydrolysates (CFHs) on colitis have not been thoroughly investigated. We initially examined the molecular weight distribution of CFHs and found that the fraction of molecules with a weight less than 1000 Da accounted for 86.98%, indicating that the hydrolysis primarily produced oligopeptides. Subsequently, we employed a dextran sulfate sodium-induced experimental colitis model to assess the therapeutic potential of CFHs. The findings indicated that preventive administration of CFHs dramatically attenuated the pathological manifestations associated with colitis in mice, including weight loss, colon shortening, and tissue damage. Furthermore, CFHs suppressed the secretion of pro-inflammatory cytokines IL-6, TNF-α, and IL-1β, as well as MPO in colon tissue. Metagenomic sequencing demonstrated that CFHs could restore balance to the dysregulated gut microbiota by reinforcing Bacteroidota and suppressing Verrucomicrobia populations, impacting various microbial functions. Metabolomic analyses further revealed that CFHs exhibited a more efficacious modulatory effect on DSS-induced metabolic abnormalities, including amino acid biosynthesis, linoleic acid metabolism, and dopaminergic synapses. In conclusion, CFHs showed promise in alleviating colitis, laying the groundwork for the development and application of CFHs as functional food for colitis relief.}, }
@article {pmid40045185, year = {2025}, author = {Freund, L and Hung, C and Topacio, TM and Diamond, C and Fresquez, A and Lyons, TW and Aronson, EL}, title = {Diversity of sulfur cycling halophiles within the Salton Sea, California's largest lake.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {120}, pmid = {40045185}, issn = {1471-2180}, support = {U54 MD013368/MD/NIMHD NIH HHS/United States ; NIH 1U54MD013368-01A1/NH/NIH HHS/United States ; NSF EAR-2012878//National Science Foundation, United States/ ; }, mesh = {California ; *Lakes/microbiology ; *Sulfur/metabolism ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; *Microbiota ; Seasons ; *Seawater/microbiology ; Biodiversity ; Ecosystem ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Microorganisms are the biotic foundation for nutrient cycling across ecosystems, and their assembly is often based on the nutrient availability of their environment. Though previous research has explored the seasonal lake turnover and geochemical cycling within the Salton Sea, California's largest lake, the microbial community of this declining ecosystem has been largely overlooked. We collected seawater from a single location within the Salton Sea at 0 m, 3 m, 4 m, 5 m, 7 m, 9 m, 10 m, and 10.5 m depths in August 2021, December 2021, and April 2022.<br><br>RESULTS: We observed that the water column microbiome significantly varied by season (R[2]&#x2009;=&#x2009;0.59, P&#x2009;=&#x2009;0.003). Temperature (R[2]&#x2009;=&#x2009;0.27, P&#x2009;=&#x2009;0.004), dissolved organic matter (R[2]&#x2009;=&#x2009;0.13, P&#x2009;=&#x2009;0.004), and dissolved oxygen (R[2]&#x2009;=&#x2009;0.089, P&#x2009;=&#x2009;0.004) were significant drivers of seasonal changes in microbial composition. In addition, several halophilic mixotrophs and other extremotolerant bacteria were consistently identified in samples across depths and time points, though their relative abundances fluctuated by season. We found that while sulfur cycling genes were present in all metagenomes, their relative coverages fluctuated by pathway and season throughout the water column. Sulfur oxidation and incomplete sulfur oxidation pathways were conserved in the microbiome across seasons.<br><br>CONCLUSIONS: Our work demonstrates that the microbiome within the Salton Seawater has the capacity to metabolize sulfur species and utilize multiple trophic strategies, such as alternating between chemorganotrophy and chemolithoautrophy, to survive this harsh, fluctuating environment. Together, these results suggest that the Salton Sea microbiome is integral in the geochemical cycling of this ever-changing ecosystem and thus contributes to the seasonal dynamics of the Salton Sea. Further work is required to understand how these environmental bacteria are implicated relationship between the Salton Sea's sulfur cycle, dust proliferation, and respiratory distress experienced by the local population.}, }
@article {pmid40045177, year = {2025}, author = {Torshizi Esfahani, A and Zafarjafarzadeh, N and Vakili, F and Bizhanpour, A and Mashaollahi, A and Karimi Kordestani, B and Baratinamin, M and Mohammadpour, S}, title = {Gut microbiome in colorectal cancer: metagenomics from bench to bedside.}, journal = {JNCI cancer spectrum}, volume = {9}, number = {3}, pages = {}, pmid = {40045177}, issn = {2515-5091}, mesh = {Humans ; *Colorectal Neoplasms/microbiology/therapy/diagnosis ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; Precision Medicine ; Prognosis ; }, abstract = {Colorectal cancer (CRC) is a major global health challenge. Emerging research highlights the pivotal role of the gut microbiota in influencing CRC risk, progression, and treatment response. Metagenomic approaches, especially high-throughput shotgun sequencing, have provided unprecedented insights into the intricate connections between the gut microbiome and CRC. By enabling comprehensive taxonomic and functional profiling, metagenomics has revealed microbial signatures, activities, and biomarkers associated with colorectal tumorigenesis. Furthermore, metagenomics has shown a potential to guide patient stratification, predict treatment outcomes, and inform microbiome-targeted interventions. Despite remaining challenges in multi-omics data integration, taxonomic gaps, and validation across diverse cohorts, metagenomics has propelled our comprehension of the intricate gut microbiome-CRC interplay. This review underscores the clinical relevance of microbial signatures as potential diagnostic and prognostic tools in CRC. Furthermore, it discusses personalized treatment strategies guided by this omics' approach.}, }
@article {pmid40044917, year = {2025}, author = {Štůsková, K and Vavřiník, A and Hakalová, E and Čechová, J and Gramaje, D and Eichmeier, A}, title = {Arbuscular mycorrhizal fungi strongly influence the endorhizosphere of grapevine rootstock with soil type as a key factor.}, journal = {Mycorrhiza}, volume = {35}, number = {2}, pages = {17}, pmid = {40044917}, issn = {1432-1890}, support = {CZ.02.1.01/0.0/0.0/16_025/0007314//Ministerstvo &#x160;kolstv&#xed;, Ml&#xe1;de&#x17e;e a T&#x11b;lov&#xfd;chovy/ ; IGA-ZF/2022-ST2-004//Internal Grant Agency, Mendel university in Brno/ ; }, mesh = {*Mycorrhizae/physiology/classification/genetics ; *Vitis/microbiology ; *Soil Microbiology ; *Soil/chemistry ; Czech Republic ; *Plant Roots/microbiology ; Symbiosis ; *Rhizosphere ; Phosphorus/analysis ; Microbiota ; }, abstract = {Arbuscular mycorrhizal fungi (AMF) play a crucial role in enhancing the health and productivity of host plants, including grapevine. By forming symbiotic relationships with plant roots, AMF significantly improve water uptake and nutrient absorption, particularly phosphorus (P) and nitrogen (N). This study evaluated the microbiome composition and AMF colonization in the grapevine endorhizosphere across five wine-growing sub-regions in the Czech Republic. In all five sub-regions, in terms of composition of the fungal microbiome, the phyla Ascomycetes and Basidiomycetes were most numerous. Additionally, the study confirmed that LSU primers are more sensitive than ITS primers for AMF sequencing. While the representation of the phylum Glomeromycetes ranged from 0.07% to 5.65% in the ITS library, it was significantly higher, ranging from 83.74% to 98.71%, in the LSU library. The most significant difference compared to other sub-regions was observed in the Slovácko sub-region, where the soil had a low pH, a different texture (sandy loam), reduced micronutrient concentration, and low organic matter. The application of chemical plant protection products to grapevines also could have played a significant role, with 49 applications recorded in the Slovácko sub-region during the three years preceding sample collection. In other sub-regions, chemical treatments were conducted only 19-26 times. These factors resulted in only trace amounts of AMF being detected in Slovácko. Furthermore, it was demonstrated that AMF positively influenced the phosphorus concentration in the soil and reduced the presence of certain fungal pathogens.}, }
@article {pmid40044673, year = {2025}, author = {Wood, JR and Zhou, C and Cole, TL and Coleman, M and Anderson, DP and Lyver, PO and Tan, S and Xiang, X and Long, X and Luo, S and Lou, M and Southon, JR and Li, Q and Zhang, G}, title = {Sedimentary DNA insights into Holocene Adélie penguin (Pygoscelis adeliae) populations and ecology in the Ross Sea, Antarctica.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {1798}, pmid = {40044673}, issn = {2041-1723}, mesh = {Animals ; *Spheniscidae/genetics/physiology ; Antarctic Regions ; *Geologic Sediments/chemistry ; DNA, Mitochondrial/genetics ; Seals, Earless/genetics ; Phylogeny ; Metagenome ; }, abstract = {We report 156 sediment metagenomes from Adélie penguin (Pygoscelis adeliae) colonies dating back 6000 years along the Ross Sea coast, Antarctica, and identify marine and terrestrial eukaryotes, including locally occurring bird and seal species. The data reveal spatiotemporal patterns of Adélie penguin diet, including spatial patterns in consumption of cnidarians, a historically overlooked component of Adélie penguin diets. Relative proportions of Adélie penguin mitochondrial lineages detected at each colony are comparable to those previously reported from bones. Elevated levels of Adélie penguin mitochondrial nucleotide diversity in upper stratigraphic samples of several active colonies are consistent with recent population growth. Moreover, the highest levels of Adélie penguin mitochondrial nucleotide diversity recovered from surface sediment layers are from the two largest colonies, indicating that sedaDNA could provide estimates for the former size of abandoned colonies. SedaDNA also reveals prior occupation of the Cape Hallett Adélie penguin colony site by southern elephant seal (Mirounga leonina), demonstrating how terrestrial sedaDNA can detect faunal turnover events in Antarctica driven by past climate or sea ice conditions. Low rates of cytosine deamination indicate exceptional sedaDNA preservation within the region, suggesting there is high potential for recovering much older sedaDNA records from local Pleistocene terrestrial sediments.}, }
@article {pmid40043973, year = {2025}, author = {Liu, N and Dai, S and Fan, X and Li, B and Chen, M and Gong, P and Chen, X}, title = {In vitro fermentation of Auricularia auricula polysaccharides and their regulation of human gut microbiota and metabolism.}, journal = {International journal of biological macromolecules}, volume = {306}, number = {Pt 4}, pages = {141714}, doi = {10.1016/j.ijbiomac.2025.141714}, pmid = {40043973}, issn = {1879-0003}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Fermentation ; Fatty Acids, Volatile/metabolism ; *Auricularia/chemistry ; Feces/microbiology ; Prebiotics ; *Polysaccharides/pharmacology/metabolism ; *Fungal Polysaccharides/pharmacology/metabolism ; Bacteria/metabolism/genetics ; Metabolomics ; }, abstract = {Auricularia auricula is abundant in polysaccharides that received increasing attention due to their variety biological activities and prebiotic potential. In order to explore the role of A. auricula polysaccharides (AAP) in regulating human gut microbiota and metabolic health, this study employed metagenomic and metabolomic analyses to examine the impact of AAP on the gut microbiota via in vitro fecal fermentation experiments. After in vitro fermentation, the data indicated that gut microbiota utilized AAP to produce rich short-chain fatty acids (SCFAs) including acetic acid, propionic acid, butyric acid and modulate gut microbiota structure, such as increasing the proportion of Bacteroidetes to Firmicutes, elevating the abundance of beneficial bacteria, including Bacteroides, especially the Parabacteroides, and inhibiting the abundance of harmful bacteria such as Bilophila, Morganella, and Escherichia-Shigella. Furthermore, the metabolomic analysis indicated that AAP utilization by gut microbes substantially alters the metabolic profile, in which 26 potential biological biomarkers were found and affects tryptophan, bile acids, purines, and butyric acid pathways to promote host health. In conclusion, this research indicated that AAP has a prebiotic potential, which can regulate the gut microbiota and promote host health. Moreover, this study provided scientific evidence for using AAP as a functional food with prebiotic effect.}, }
@article {pmid40043731, year = {2025}, author = {Wang, M and Liu, YB and Tong, WM and Leung, WK and He, LL and Xu, X and Xu, D and Zhou, Q}, title = {Periodontitis History Shapes the Early Peri-Implant Microbiome Formation: A Metagenomic Analysis.}, journal = {Journal of clinical periodontology}, volume = {52}, number = {7}, pages = {1011-1023}, pmid = {40043731}, issn = {1600-051X}, support = {32270188//National Natural Science Foundation of China/ ; 32070134//National Natural Science Foundation of China/ ; 2023-YBSF-162//Key Research and Development Program of Shaanxi Province, China/ ; //National Training Program of Innovation and Entrepreneurship for Undergraduates/ ; }, mesh = {Humans ; Female ; *Microbiota/genetics ; *Periodontitis/microbiology ; Male ; Middle Aged ; Metagenomics ; *Dysbiosis/microbiology ; *Dental Implants/microbiology ; Adult ; Periodontal Index ; Dental Plaque/microbiology ; Crowns ; }, abstract = {AIM: This study aims to investigate the early alterations in microbiome construction and succession around dental implants in both periodontally healthy individuals and patients with a history of periodontitis during the first month after implant-crown placement.<br><br>MATERIALS AND METHODS: Ninety-five subgingival plaque samples were collected from 10 periodontally compromised patients (PCP) and nine periodontally healthy patients (PHP) at four time points with a 1-week interval and analysed using dynamic metagenomic analysis. The study compared the formation and temporal change in the peri-implant microbiome in the PCP and PHP groups during the first month after the implant crown placement. A two-year follow-up examination was conducted to assess the clinical outcomes of early peri-implant dysbiosis.<br><br>RESULTS: The results showed that PCP groups exhibited distinctively dysbiotic features in their peri-implant microbiome upon initial establishment, with an earlier and elevated emergence of periodontopathogens. This dysbiosis in the PCP group was associated with significantly higher modified sulcus bleeding index (mBI) scores compared with the PHP group. Neisseria was identified as a key driver of early peri-implant dysbiosis in patients with a periodontitis history.<br><br>CONCLUSIONS: This study established the first microbial link between periodontitis history and early peri-implant dysbiosis, highlighting the importance of early prevention strategies against peri-implant diseases in patients with a periodontitis history.}, }
@article {pmid40043390, year = {2025}, author = {Li, F and Zeng, Z and Wu, Y and Wang, Y and Shen, L and Huang, X and Wang, X and Sun, Y}, title = {Characteristics of microplastics in typical poultry farms and the association of environment microplastics colonized-microbiota, waterfowl gut microbiota, and antibiotic resistance genes.}, journal = {Journal of hazardous materials}, volume = {490}, number = {}, pages = {137808}, doi = {10.1016/j.jhazmat.2025.137808}, pmid = {40043390}, issn = {1873-3336}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/genetics ; *Microplastics/analysis/toxicity ; *Drug Resistance, Microbial/genetics ; Poultry ; Farms ; *Water Pollutants, Chemical/analysis ; Environmental Monitoring ; }, abstract = {Microplastics (MPs) pollution is a growing global environmental concern. MPs serve as ecological niches for microbial communities, which may accelerate the spread of antibiotic resistance genes (ARGs), posing risks to the breeding industry. While studies on MPs in aquatic organisms are common, research on farmed poultry is limited. This study investigates MPs in poultry farm environments and waterfowl intestines for the first time. MPs were isolated via density separation and analyzed for characterization in soil, pond water, and waterfowl intestines. Metagenomics was used to investigate the association between environment MPs colonized-microbiota and waterfowl gut microbiota. Our findings reveal that MPs are abundant in soil (6.75 ± 2.78 items/g d.w.), pond water (0.94 ± 0.28 items/g w.w.), and poultry intestines (45.35 ± 19.52 items/g w.w.), primarily appearing as fragmented particles sized 20-50 μm. MPs abundance in intestines correlates with environmental levels. Colonized-microbiota on MPs are linked to poultry intestinal microbiota, with greater diversity and microbial functions. Network analysis reveals that Corynebacterium plays a key role in MPs and poultry intestinal. Polymyxin resistance exhibits high clustering. Procrustes analysis reveals correlations between MPs, bacteria, and ARGs in the farming environment. Overall, MPs in poultry farms may facilitate pathogen and ARGs transmission, posing risks to animal gut health.}, }
@article {pmid40043057, year = {2025}, author = {Mercado-Juárez, RA and Valdespino-Castillo, PM and Merino Ibarra, M and Batista, S and Mac Cormack, W and Ruberto, L and Carpenter, EJ and Capone, DG and Falcón, LI}, title = {What defines a photosynthetic microbial mat in western Antarctica?.}, journal = {PloS one}, volume = {20}, number = {3}, pages = {e0315919}, pmid = {40043057}, issn = {1932-6203}, mesh = {Antarctic Regions ; *Photosynthesis ; *Bacteria/genetics/classification ; Archaea/genetics/classification ; Biodiversity ; *Microbiota ; Phylogeny ; }, abstract = {Antarctic microbial mats, with their significant biodiversity and key role in biogeochemical cycling, were the focus of our study. We employed a metagenomic approach to analyze 14 microbial mats from meltwater streams of western Antarctica, covering the Maritime, Peninsula, and Dry Valleys regions. Our findings revealed that the taxonomic compositional level of the microbial mat communities is characterized by similar bacterial groups, with diatoms being the main distinguishing factor between the rapidly warming Maritime Antarctica and the other mats. Bacteria were found to be the predominant component of all microbial mats (>90%), followed by Eukarya (>3%), Archaea (<1%), and Viruses (<0.1%). The average abundance of the main phyla composing Antarctic microbial mats included Bacteroidota (35%), Pseudomonadota (29%), Cyanobacteriota (19%), Verrucomicrobiota (3%), Bacillariophyta (2%), Planctomycetota (2%), Acidobacteriota (2%), Actinomycetota (2%), Bacillota (1%), and Chloroflexota (1%). We also identified some microeukaryotes that could play essential roles in the functioning of Antarctic microbial mats. Notably, all mats were found in sites with varied environmental characteristics, showed N-limitation, and shared functional patterns.}, }
@article {pmid40042126, year = {2025}, author = {Hayden, HS and Nelson, MT and Ross, SE and Verster, AJ and Bouzek, DC and Eng, A and Waalkes, A and Penewit, K and Kopp, BT and Siracusa, C and Rock, MJ and Salipante, SJ and Hoffman, LR and Sanders, DB}, title = {Effects of Therapeutic Antibiotic Exposure on the Oropharyngeal and Fecal Microbiota in Infants With Cystic Fibrosis.}, journal = {Pediatric pulmonology}, volume = {60}, number = {3}, pages = {e71024}, pmid = {40042126}, issn = {1099-0496}, support = {K24 HL141669/HL/NHLBI NIH HHS/United States ; P30 DK089507/DK/NIDDK NIH HHS/United States ; //This work was supported by the Cystic Fibrosis Foundation (CFF; SANDER16Y5, SANDER18A0-I) and the National Institutes of Health (NIH; NIH NHLBI K24HL141669)./ ; }, mesh = {Humans ; *Cystic Fibrosis/drug therapy/microbiology ; *Feces/microbiology ; Infant ; *Anti-Bacterial Agents/therapeutic use/pharmacology ; *Oropharynx/microbiology ; Male ; Female ; *Microbiota/drug effects ; *beta-Lactams/therapeutic use/pharmacology ; Bacterial Load ; Longitudinal Studies ; }, abstract = {BACKGROUND: Systemic antibiotics can impact all microbes inhabiting patients, regardless of the intended target organism(s). We studied the simultaneous effects on respiratory and fecal microbiomes of β-lactam antibiotics administered for respiratory symptoms in infants with cystic fibrosis (IWCF).<br><br>OBJECTIVE: To compare the magnitude and duration of intended (respiratory) and unintended (fecal) antimicrobial action by analyzing oropharyngeal (OP) and fecal microbiota in IWCF.<br><br>DESIGN: Shotgun metagenomic sequencing and qPCR were performed on OP and fecal samples collected longitudinally from 14 IWCF (ages 1-17 months) during ("On Antibiotics") and after ("Off Antibiotics") &#x3b2;-lactam therapy, and from 5 IWCF (3-16 months) never treated with antibiotics.<br><br>RESULTS: Total bacterial loads (TBL) for On Antibiotics samples were lower than for both Never (OP and fecal) and Off Antibiotics samples (fecal only). &#x3b1;-diversities (within-sample) for OP On Antibiotics samples were lower than for Never and Off Antibiotics samples but did not differ between fecal sample groups. &#x3b2;-diversity (between-sample) differed between all OP sample groups and between fecal On and Never Antibiotics and Off and Never antibiotics samples; however, fecal On and Off Antibiotics sample &#x3b2;-diversities did not differ. Patterns of change in antibiotic resistance gene abundances reflected shifts in microbial community composition.<br><br>CONCLUSIONS: &#x3b2;-lactam antibiotic exposure was followed by marked alterations in both OP and fecal microbiota. While microbiota appeared to rebound after treatment in both sample types, our results suggest that fecal microbiota recovered less than OP. The clinical consequences of these findings should be studied in IWCF and other populations frequently treated with antibiotics.}, }
@article {pmid40040609, year = {2025}, author = {Liu, FQ and An, ZY and Cui, LJ and Xiao, MY and Wu, YJ and Li, W and Zhang, BS and Yu, L and Feng, J and Liu, ZG and Feng, R and Jiang, ZX and Huang, RB and Jing, HM and Ren, JH and Zhu, XY and Cheng, YF and Li, YH and Zhou, HB and Gao, D and Liu, Y and Yu, F and Wang, X and Qiao, JL and Hu, DH and Wang, LL and Zang, MT and Chen, Q and Qu, QY and Zhou, JY and Li, ML and Chen, YX and Huang, QS and Fu, HX and Li, YY and Wang, QF and Huang, XJ and Zhang, XH and , }, title = {Correlation Between Fecal Microbiota and Corticosteroid Responsiveness in Primary Immune Thrombocytopenia: an Exploratory Study.}, journal = {Advanced science (Weinheim, Baden-Wurttemberg, Germany)}, volume = {12}, number = {22}, pages = {e2410417}, pmid = {40040609}, issn = {2198-3844}, support = {2023YFC2507803//Key Technologies Research and Development Program/ ; 82300149//National Natural Science Foundation of China/ ; 82130008//National Natural Science Foundation of China/ ; 82230004//National Natural Science Foundation of China/ ; 82350004//National Natural Science Foundation of China/ ; 82430006//National Natural Science Foundation of China/ ; 2024M761208//China Postdoctoral Science Foundation/ ; 2023ZB182//Department of Human Resources and Social Security of Jiangsu Province/ ; 2022-1-4082//Capital Health Research and Development of Special Fund/ ; 7242154//Natural Science Foundation of Beijing Municipality/ ; 7232188//Natural Science Foundation of Beijing Municipality/ ; 71003Y3035//Peking University Medicine/ ; }, mesh = {Humans ; *Purpura, Thrombocytopenic, Idiopathic/drug therapy/microbiology ; *Gastrointestinal Microbiome/drug effects/genetics ; Male ; Female ; *Feces/microbiology ; Middle Aged ; *Adrenal Cortex Hormones/therapeutic use ; Adult ; Aged ; Support Vector Machine ; Metagenomics ; Machine Learning ; }, abstract = {Corticosteroids (CSs) are the initial therapy for immune thrombocytopenia (ITP); however, their efficacy is not adequately predicted. As a novel biomarker, the composition of the gut microbiota is non-invasively tested and altered in patients with ITP. This study aims to develop a predictive model that leverages gut microbiome data to predict the CS response in patients with ITP within the initial four weeks of treatment. Metagenomic sequencing is performed on fecal samples from 212 patients with ITP, 152 of whom underwent CS treatment and follow-up. Predictive models are trained using six machine-learning algorithms, integrating clinical indices and gut microbiome data. The support vector machine (SVM) algorithm-based model has the highest accuracy (AUC = 0.80). This model utilized a comprehensive feature set that combined clinical data (including sex, age, duration, platelet count, and bleeding scales) with selected microbial species (including Bacteroides ovatus, Bacteroides xylanisolvens, and Parabacteroides gordonii), alpha diversities, KEGG pathways, and microbial modules. This study will provide new ideas for the prediction of clinical CS efficacy, enabling informed decision-making regarding the initiation of CS or personalized treatment in patients with ITP.}, }
@article {pmid40038838, year = {2025}, author = {Thiruppathy, D and Moyne, O and Marotz, C and Williams, M and Navarro, P and Zaramela, L and Zengler, K}, title = {Absolute quantification of the living skin microbiome overcomes relic-DNA bias and reveals specific patterns across volunteers.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {65}, pmid = {40038838}, issn = {2049-2618}, support = {S10 OD026929/NH/NIH HHS/United States ; }, mesh = {Humans ; *Skin/microbiology ; *Microbiota/genetics ; *Metagenomics/methods ; *Bacteria/genetics/classification/isolation &amp; purification ; *DNA, Bacterial/genetics ; Sequence Analysis, DNA/methods ; Bacterial Load ; Healthy Volunteers ; Female ; Male ; Adult ; Skin Microbiome ; }, abstract = {BACKGROUND: As the first line of defense against external pathogens, the skin and its resident microbiota are responsible for protection and eubiosis. Innovations in DNA sequencing have significantly increased our knowledge of the skin microbiome. However, current characterizations do not discriminate between DNA from live cells and remnant DNA from dead organisms (relic DNA), resulting in a combined readout of all microorganisms that were and are currently present on the skin rather than the actual living population of the microbiome. Additionally, most methods lack the capability for absolute quantification of the microbial load on the skin, complicating the extrapolation of clinically relevant information.<br><br>RESULTS: Here, we integrated relic-DNA depletion with shotgun metagenomics and bacterial load determination to quantify live bacterial cell abundances across different skin sites. Though we discovered up to 90% of microbial DNA from the skin to be relic DNA, we saw no significant effect of this on the relative abundances of taxa determined by shotgun sequencing. Relic-DNA depletion prior to sequencing strengthened underlying patterns between microbiomes across volunteers and reduced intraindividual similarity. We determined the absolute abundance and the fraction of population alive for several common skin taxa across body sites and found taxa-specific differential abundance of live bacteria across regions to be different from estimates generated by total DNA (live&#x2009;+&#x2009;dead) sequencing.<br><br>CONCLUSIONS: Our results reveal the significant bias relic DNA has on the quantification of low biomass samples like the skin. The reduced intraindividual similarity across samples following relic-DNA depletion highlights the bias introduced by traditional (total DNA) sequencing in diversity comparisons across samples. The divergent levels of cell viability measured across different skin sites, along with the inconsistencies in taxa differential abundance determined by total vs live cell DNA sequencing, suggest an important hypothesis for certain sites being susceptible to pathogen infection. Overall, our study demonstrates a characterization of the skin microbiome that overcomes relic-DNA bias to provide a baseline for live microbiota that will further improve mechanistic studies of infection, disease progression, and the design of therapies for the skin. Video Abstract.}, }
@article {pmid40038315, year = {2025}, author = {Chen, Y and Chen, S and Tao, J and Li, M and Wang, W and Chen, M and Fang, X and Kong, L and Wang, Y and Pereira, O and Zhang, C}, title = {Multi-omic stock of surface ocean microbiome built by monthly, weekly and daily sampling in Dapeng Bay, China.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {378}, pmid = {40038315}, issn = {2052-4463}, support = {32393974//National Natural Science Foundation of China (National Science Foundation of China)/ ; 42321004//National Natural Science Foundation of China (National Science Foundation of China)/ ; 92351301//National Natural Science Foundation of China (National Science Foundation of China)/ ; RCBS20221008093229035//Shenzhen Science and Technology Innovation Commission/ ; 92351301//&#xc9;cole Nationale d'Ing&#xe9;nieurs de Saint-Etienne (National Engineering School of Saint-&#xc9;tienne)/ ; }, mesh = {China ; *Microbiota ; *Bays/microbiology ; Archaea/genetics/classification ; Metagenome ; Bacteria/classification/genetics ; Oceans and Seas ; Metagenomics ; *Seawater/microbiology ; Multiomics ; }, abstract = {The coastal ocean is the dynamic interface where terrestrial, atmospheric, and marine systems converge, acting as a hotspot for microbial activity, which underpins the intricate web of carbon and nitrogen cycling. Dapeng Bay, a typical semi-enclosed bay along the southern coastline of China, is strongly influenced by monsoon climates and human activities. Despite its ecological importance, long-term observations and investigations into the microbial community structure in this region are notably lacking. To address this gap, we conducted a two-year continuous sampling from May 2021 to June 2023 to explore shifts in nearshore surface microbial communities and assess the long-term effects of environmental stressors. This study presents comprehensive amplicon, metagenomic, and metatranscriptomic information. We identified 3,600 amplicon sequence variants and recovered 1,216 high-quality metagenome-assembled MAGs, representing 17 bacterial and 3 archaeal phyla. Additionally, 587 MAGs were correlated with transcriptional activity, comprising 539 bacterial and 48 archaeal populations. This dataset is anticipated to provide a multi-dimensional perspective, enhancing our understanding of the complexity, dynamics, and adaptability of microbial communities in coastal environments.}, }
@article {pmid40038282, year = {2025}, author = {Li, Z and Riley, WJ and Marschmann, GL and Karaoz, U and Shirley, IA and Wu, Q and Bouskill, NJ and Chang, KY and Crill, PM and Grant, RF and King, E and Saleska, SR and Sullivan, MB and Tang, J and Varner, RK and Woodcroft, BJ and Wrighton, KC and ,  and Brodie, EL}, title = {A framework for integrating genomics, microbial traits, and ecosystem biogeochemistry.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {2186}, pmid = {40038282}, issn = {2041-1723}, support = {DE-AC02-05CH11231//DOE | Office of Science (SC)/ ; SCW1746//DOE | Office of Science (SC)/ ; (#FP00005182//DOE | Office of Science (SC)/ ; 2022070//National Science Foundation (NSF)/ ; }, mesh = {*Ecosystem ; *Genomics/methods ; Methane/metabolism ; Wetlands ; *Microbiota/genetics ; Metagenomics/methods ; Climate Change ; Arctic Regions ; Bacteria/genetics/metabolism ; Greenhouse Gases/metabolism ; }, abstract = {Microbes drive the biogeochemical cycles of earth systems, yet the long-standing goal of linking emerging genomic information, microbial traits, mechanistic ecosystem models, and projections under climate change has remained elusive despite a wealth of emerging genomic information. Here we developed a general genome-to-ecosystem (G2E) framework for integrating genome-inferred microbial kinetic traits into mechanistic models of terrestrial ecosystems and applied it at a well-studied Arctic wetland by benchmarking predictions against observed greenhouse gas emissions. We found variation in genome-inferred microbial kinetic traits resulted in large differences in simulated annual methane emissions, quantitatively demonstrating that the genomically observable variations in microbial capacity are consequential for ecosystem functioning. Applying microbial community-aggregated traits via genome relative-abundance-weighting gave better methane emissions predictions (i.e., up to 54% decrease in bias) compared to ignoring the observed abundances, highlighting the value of combined trait inferences and abundances. This work provides an example of integrating microbial functional trait-based genomics, mechanistic and pragmatic trait parameterizations of diverse microbial metabolisms, and mechanistic ecosystem modeling. The generalizable G2E framework will enable the use of abundant microbial metagenomics data to improve predictions of microbial interactions in many complex systems, including oceanic microbiomes.}, }
@article {pmid40038255, year = {2025}, author = {Cui, B and Luo, H and He, B and Liu, X and Lv, D and Zhang, X and Su, K and Zheng, S and Lu, J and Wang, C and Yang, Y and Zhao, Z and Liu, X and Wang, X and Zhao, Y and Nie, X and Jiang, Y and Zhang, Z and Liu, C and Chen, X and Cai, A and Lv, Z and Liu, Z and An, F and Zhang, Y and Yan, Q and Kelley, KW and Xu, G and Xu, L and Liu, Q and Peng, F}, title = {Gut dysbiosis conveys psychological stress to activate LRP5/β-catenin pathway promoting cancer stemness.}, journal = {Signal transduction and targeted therapy}, volume = {10}, number = {1}, pages = {79}, pmid = {40038255}, issn = {2059-3635}, support = {82373096//National Natural Science Foundation of China (National Science Foundation of China)/ ; No. 82273480//National Natural Science Foundation of China (National Science Foundation of China)/ ; 82473131//National Natural Science Foundation of China (National Science Foundation of China)/ ; 82273480//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Animals ; *Dysbiosis/microbiology/genetics/pathology ; Humans ; Mice ; *Gastrointestinal Microbiome/genetics/drug effects ; Female ; *Low Density Lipoprotein Receptor-Related Protein-5/genetics/metabolism ; *beta Catenin/genetics/metabolism ; *Stress, Psychological/microbiology/genetics/pathology ; *Neoplastic Stem Cells/pathology/metabolism ; Wnt Signaling Pathway/genetics ; *Breast Neoplasms/microbiology/pathology/genetics ; Akkermansia ; Butyrates ; Gene Expression Regulation, Neoplastic ; }, abstract = {Psychological stress causes gut microbial dysbiosis and cancer progression, yet how gut microbiota determines psychological stress-induced tumor development remains unclear. Here we showed that psychological stress promotes breast tumor growth and cancer stemness, an outcome that depends on gut microbiota in germ-free and antibiotic-treated mice. Metagenomic and metabolomic analyses revealed that psychological stress markedly alters the composition and abundance of gut microbiota, especially Akkermansia muciniphila (A. muciniphila), and decreases short-chain fatty acid butyrate. Supplement of active A. muciniphila, butyrate or a butyrate-producing high fiber diet dramatically reversed the oncogenic property and anxiety-like behavior of psychological stress in a murine spontaneous tumor model or an orthotopic tumor model. Mechanistically, RNA sequencing analysis screened out that butyrate decreases LRP5 expression to block the activation of Wnt/β-catenin signaling pathway, dampening breast cancer stemness. Moreover, butyrate as a HDAC inhibitor elevated histone H3K9 acetylation level to transcriptionally activate ZFP36, which further accelerates LRP5 mRNA decay by binding adenine uridine-rich (AU-rich) elements of LRP5 transcript. Clinically, fecal A. muciniphila and serum butyrate were inversely correlated with tumoral LRP5/β-catenin expression, poor prognosis and negative mood in breast cancer patients. Altogether, our findings uncover a microbiota-dependent mechanism of psychological stress-triggered cancer stemness, and provide both clinical biomarkers and potential therapeutic avenues for cancer patients undergoing psychological stress.}, }
@article {pmid40037607, year = {2025}, author = {Antaliya, K and Godhaniya, M and Galawala, J and Vansia, A and Mangrola, A and Ghelani, A and Patel, R}, title = {Microbial community transition in Surti buffalo-based fermented formulations sustainably enhances soil fertility and plant growth.}, journal = {Letters in applied microbiology}, volume = {78}, number = {3}, pages = {}, doi = {10.1093/lambio/ovaf030}, pmid = {40037607}, issn = {1472-765X}, support = {GSBTM/JD(R&amp;D)661/2022-2023/00172813//Gujarat State Biotechnology Mission/ ; }, mesh = {*Soil Microbiology ; Animals ; *Soil/chemistry ; Fermentation ; *Plant Development ; *Buffaloes ; *Fertilizers/microbiology ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Microbiota ; Vigna/growth &amp; development ; Feces/microbiology ; }, abstract = {This study investigates the role of microbial dynamics during the fermentation of buffalo dung and urine-fermented plant growth-promoting formulation, a natural biofertilizer, and its impact on plant growth and soil health. This formulation was prepared using Surti buffalo dung, urine, jaggery, gram flour, and soil and fermented for up to 14 days. Metagenomic analysis revealed microbial succession from a diverse initial community to a Bacillus-dominated population, especially the Lactic Acid Bacteria, after 8 days of fermentation. The changes were accompanied by increases in the plant growth-promoting genes related to nutrient acquisition, phytohormone production, and stress resistance. The pot experiment revealed a significant increase in mung bean growth, with the maximum effect obtained from the eighth-day fermented formulation. The experiment showed considerable improvement in the physicochemical properties of soil, including increased organic carbon and nutrient availability. These findings underscore the ecological importance of microbial input preparation in enhancing soil fertility and plant growth sustainably. Future research should delve deeper into the specific mechanisms these microbes facilitate nutrient cycling and resilience in various agroclimatic conditions.}, }
@article {pmid40037564, year = {2025}, author = {Miller, SJ and Zhang, F and Taylor, S and Woodman, R and Shoubridge, AP and Papanicolas, LE and Rogers, GB}, title = {Oropharyngeal Staphylococcus aureus is linked to higher mortality in long-term aged care residents.}, journal = {Age and ageing}, volume = {54}, number = {3}, pages = {}, doi = {10.1093/ageing/afaf042}, pmid = {40037564}, issn = {1468-2834}, support = {//Australian Medical Research Future Fund/ ; GNT1152268//Australian Department of Health/ ; //Australian Department of Health/ ; GNT119378//National Health and Medical Research Council/ ; //Matthew Flinders Professorial Fellowship/ ; GNT2008625//NHMRC Emerging Leadership/ ; }, mesh = {Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Age Factors ; *Carrier State/microbiology ; Comorbidity ; *Homes for the Aged ; Long-Term Care ; Microbiota ; *Nursing Homes ; *Oropharynx/microbiology ; Risk Factors ; South Australia/epidemiology ; *Staphylococcal Infections/mortality/microbiology/diagnosis ; *Staphylococcus aureus/isolation &amp; purification ; Time Factors ; Cross-Sectional Studies ; }, abstract = {BACKGROUND: Biological ageing, healthcare interactions, and pharmaceutical and environmental exposures in later life alter the characteristics of the oropharyngeal (OP) microbiome. These changes, including an increased susceptibility to colonisation by pathobiont species, have been linked with diverse health outcomes.<br><br>OBJECTIVES: To investigate the relationship between OP microbiome characteristics and all-cause mortality in long-term aged care residents.<br><br>METHODS: OP swabs were collected from 190 residents of five aged care facilities in South Australia. Microbiota composition was assessed by shotgun metagenomics and related to health outcomes during a 12-month follow-up period. OP carriage of Staphylococcus aureus and methicillin resistance was confirmed by qPCR.<br><br>RESULTS: OP carriage of S. aureus was identified in 13 (6.8%) residents. Detection of S. aureus was significantly associated with an increased risk of mortality (adjusted HR [95% CI]: 9.7 [3.8-24.9], P&#x2009;<&#x2009;.0001), compared with non-carriers, independent of methicillin resistance. Staphylococcus aureus carriage demonstrated a stronger association with mortality risk than the total number of comorbidities at the univariate level (S. aureus HR [95% CI]: 7.2 [3.4-15.5], P&#x2009;<&#x2009;.0001 vs. comorbidity count HR [95% CI]: 1.1 [1.0-1.3], P&#x2009;=&#x2009;.03), and remained significant after multivariable adjustment. Staphylococcus aureus detection was significantly associated with total number of comorbidities (adjusted OR [95% CI]: 1.4 [1.0-2.0], P&#x2009;=&#x2009;.04).<br><br>CONCLUSION: OP S. aureus carriage predicts all-cause mortality in long-term aged care. We speculate that S. aureus carriage represents a marker of general health, including prior healthcare exposures. OP S. aureus carriage could contribute to estimations of general health in older individuals and thereby inform care strategies.}, }
@article {pmid40037293, year = {2025}, author = {Delherbe, NA and Gomez, O and Plominsky, AM and Oliver, A and Manzanera, M and Kalyuzhnaya, MG}, title = {Atmospheric methane consumption in arid ecosystems acts as a reverse chimney and is accelerated by plant-methanotroph biomes.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {40037293}, issn = {1751-7370}, support = {DE-SC0024289//U.S. Department of Energy/ ; }, mesh = {*Methane/metabolism ; *Soil Microbiology ; California ; Desert Climate ; Microbiota ; *Ecosystem ; Metagenomics ; Metagenome ; *Plants/metabolism/microbiology ; *Bacteria/classification/metabolism/genetics ; Atmosphere/chemistry ; Oxygenases ; }, abstract = {Drylands cover one-third of the Earth's surface and are one of the largest terrestrial sinks for methane. Understanding the structure-function interplay between members of arid biomes can provide critical insights into mechanisms of resilience toward anthropogenic and climate-change-driven environmental stressors-water scarcity, heatwaves, and increased atmospheric greenhouse gases. This study integrates in situ measurements with culture-independent and enrichment-based investigations of methane-consuming microbiomes inhabiting soil in the Anza-Borrego Desert, a model arid ecosystem in Southern California, United States. The atmospheric methane consumption ranged between 2.26 and 12.73 μmol m2 h-1, peaking during the daytime at vegetated sites. Metagenomic studies revealed similar soil-microbiome compositions at vegetated and unvegetated sites, with Methylocaldum being the major methanotrophic clade. Eighty-four metagenome-assembled genomes were recovered, six represented by methanotrophic bacteria (three Methylocaldum, two Methylobacter, and uncultivated Methylococcaceae). The prevalence of copper-containing methane monooxygenases in metagenomic datasets suggests a diverse potential for methane oxidation in canonical methanotrophs and uncultivated Gammaproteobacteria. Five pure cultures of methanotrophic bacteria were obtained, including four Methylocaldum. Genomic analysis of Methylocaldum isolates and metagenome-assembled genomes revealed the presence of multiple stand-alone methane monooxygenase subunit C paralogs, which may have functions beyond methane oxidation. Furthermore, these methanotrophs have genetic signatures typically linked to symbiotic interactions with plants, including tryptophan synthesis and indole-3-acetic acid production. Based on in situ fluxes and soil microbiome compositions, we propose the existence of arid-soil reverse chimneys, an empowered methane sink represented by yet-to-be-defined cooperation between desert vegetation and methane-consuming microbiomes.}, }
@article {pmid40037072, year = {2025}, author = {Meng, JX and Li, MH and Wang, XY and Li, S and Zhang, Y and Ni, HB and Ma, H and Liu, R and Yan, JC and Li, XM and Sun, YZ and Yang, X and Zhang, XX}, title = {Temporal variability in the diversity, function and resistome landscapes in the gut microbiome of broilers.}, journal = {Ecotoxicology and environmental safety}, volume = {292}, number = {}, pages = {117976}, doi = {10.1016/j.ecoenv.2025.117976}, pmid = {40037072}, issn = {1090-2414}, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Chickens/microbiology ; *Bacteria/genetics/classification ; Metagenomics ; Drug Resistance, Bacterial/genetics ; Biodiversity ; }, abstract = {Understanding the dynamic and stability of gut microbiota over the course of production cycle of broiler chicken can help identify microbial features that associate with better health and productivity. In the present study, we profile the changes in the composition and stability of gut microbiota of commercially raised broilers at nine distinct time points using shotgun metagenomics and culturomics approaches. We demonstrate, within the first week post-hatching, a rapid decline in relative abundance of 122 pioneer microbial species including Bacteroides fragilis, Lachnospira eligens and Ruminococcus gnavus, accompanied by a substantial decrease in both microbial richness and diversity. This was followed by a gradual increase and stabilization in the microbial diversity and population structure that persisted until the broilers reached the marketing age. Throughout the production cycle, key bacterial families such as Lachnospiraceae, Bacteroidaceae, and Ruminococcaceae were identified. However, significant shifts at the lower taxonomic levels occurred at different production stages, influencing the functional capacities and resistance profiles of the microbiota. During the rapid growth phase, enzymes crucial to vitamin and amino acid metabolism dominated, whereas enzymes associated with carbohydrate and energy metabolism were notably more abundant during the fattening stage. Many predicted antibiotic resistance genes were detected in association with typical commensal bacterial species in the gut microbiota, indicating a sustained resistance of the gut microbiota to antibiotic classes such as aminoglycosides and tetracyclines, which persist even in the absence of antibiotic selection pressure. Our research carries important implications for the management and health surveillance of broiler production.}, }
@article {pmid40036691, year = {2025}, author = {Gao, Y and Luo, H and Lyu, H and Yang, H and Yousuf, S and Huang, S and Liu, YX}, title = {Benchmarking short-read metagenomics tools for removing host contamination.}, journal = {GigaScience}, volume = {14}, number = {}, pages = {}, pmid = {40036691}, issn = {2047-217X}, support = {2024M753580//China Postdoctoral Science Foundation/ ; U23A20148//National Natural Science Foundation of China/ ; CAAS-ZDRW202308//Agricultural Science and Technology Innovation Program/ ; }, mesh = {*Metagenomics/methods/standards ; *DNA Contamination ; Microbiota/genetics ; Benchmarking ; Humans ; Metagenome ; Computational Biology/methods ; Software ; Sequence Analysis, DNA/methods ; High-Throughput Nucleotide Sequencing ; }, abstract = {BACKGROUND: The rapid evolution of metagenomic sequencing technology offers remarkable opportunities to explore the intricate roles of microbiome in host health and disease, as well as to uncover the unknown structure and functions of microbial communities. However, the swift accumulation of metagenomic data poses substantial challenges for data analysis. Contamination from host DNA can substantially compromise result accuracy and increase additional computational resources by including nontarget sequences.<br><br>RESULTS: In this study, we assessed the impact of computational host DNA decontamination on downstream analyses, highlighting its importance in producing accurate results efficiently. We also evaluated the performance of conventional tools like KneadData, Bowtie2, BWA, KMCP, Kraken2, and KrakenUniq, each offering unique advantages for different applications. Furthermore, we highlighted the importance of an accurate host reference genome, noting that its absence negatively affected the decontamination performance across all tools.<br><br>CONCLUSIONS: Our findings underscore the need for careful selection of decontamination tools and reference genomes to enhance the accuracy of metagenomic analyses. These insights provide valuable guidance for improving the reliability and reproducibility of microbiome research.}, }
@article {pmid40035787, year = {2025}, author = {Tappauf, N and Lamers, Y and Sham, HP and Piper, HG}, title = {Multiomics profiling and parenteral nutrition weaning in pediatric patients with intestinal failure: A longitudinal cohort study.}, journal = {JPEN. Journal of parenteral and enteral nutrition}, volume = {49}, number = {4}, pages = {451-459}, pmid = {40035787}, issn = {1941-2444}, support = {//This study was funded through a 2021-2022 Healthy Starts Catalyst Grant, awarded by the BC Children's Hospital Research Institute in Vancouver, Canada./ ; }, mesh = {Humans ; Longitudinal Studies ; Male ; Female ; *Parenteral Nutrition ; *Gastrointestinal Microbiome ; Infant ; *Intestinal Failure/therapy/microbiology ; Child, Preschool ; Feces/microbiology ; *Weaning ; *Metabolomics ; Biomarkers/blood ; Cohort Studies ; Child ; Bacteria/classification/genetics ; Multiomics ; }, abstract = {BACKGROUND: Intestinal failure (IF) is a life-limiting condition that includes a variety of intestinal pathologies. Currently, there are few clinical biomarkers that reflect intestinal function or a patient's potential to wean off parenteral nutrition (PN), making it difficult to predict the clinical trajectory. By associating gut microbiome taxonomic and functional features and blood analytes with the proportion of daily energy delivered via PN-a proxy for intestinal function-our study aimed to discover potential predictors of intestinal function and PN weaning potential.<br><br>METHODS: In this longitudinal multiomics cohort study, we followed 18 pediatric patients with IF and PN support for &#x2264;1.5 years. Fecal and stoma samples were analyzed using metagenomic shotgun sequencing to assess bacterial taxonomy and function and internal transcribed spacer 2 ribosomal RNA sequencing to characterize the fungal community. Targeted metabolomics was used to quantify 257 blood analytes. Linear mixed models were used to analyze the associations of PN dependence with microbiome features and blood analytes.<br><br>RESULTS: The bacterial and fungal taxonomic composition exhibited substantial interpatient and intrapatient variability, with no link to PN dependence. In contrast, bacterial functional analysis revealed 63 MetaCyc pathways significantly associated with PN dependence. Additionally, 32 blood analytes were associated with PN dependence.<br><br>CONCLUSION: In this exploratory study, we found that functional microbiome features and blood metabolomic profiles-particularly urea cycle metabolites, creatinine, asparagine, and tryptophan-derived metabolites-show promise for predicting intestinal function. Furthermore, they may have therapeutic implications for promoting intestinal adaptation. Confirmatory trials with larger sample sizes are needed to validate these findings.}, }
@article {pmid40032396, year = {2025}, author = {Zimmermann, P and Kurth, S and Giannoukos, S and Stocker, M and Bokulich, NA}, title = {NapBiome trial: Targeting gut microbiota to improve sleep rhythm and developmental and behavioural outcomes in early childhood in a birth cohort in Switzerland - a study protocol.}, journal = {BMJ open}, volume = {15}, number = {3}, pages = {e092938}, pmid = {40032396}, issn = {2044-6055}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Switzerland ; *Sleep/physiology ; Infant ; Double-Blind Method ; *Child Development ; Child, Preschool ; Infant, Newborn ; *Synbiotics/administration &amp; dosage ; Randomized Controlled Trials as Topic ; Multicenter Studies as Topic ; Birth Cohort ; Infant, Premature ; Female ; Male ; Brain ; }, abstract = {INTRODUCTION: The gut-brain axis plays a crucial role in the regulation and development of psychological and physical processes. The first year of life is a critical period for the development of the gut microbiome, which parallels important milestones in establishing sleep rhythm and brain development. Growing evidence suggests that the gut microbiome influences sleep, cognition and early neurodevelopment. For term-born and preterm-born infants, difficulties in sleep regulation may have consequences on health. Identifying effective interventions on the gut-brain axis in early life is likely to have long-term implications for the health and development of at-risk infants.<br><br>METHODS AND ANALYSES: In this multicentre, four-group, double-blinded, placebo (PLC)-controlled randomised trial with a factorial design, 120 preterm-born and 260 term-born infants will be included. The study will investigate whether the administration of daily synbiotics or PLC for a duration of 3&#x2009;months improves sleep patterns and neurodevelopmental outcomes up to 2 years of age. The trial will also: (1) determine the association between gut microbiota, sleep patterns and health outcomes in children up to 2 years of age; and (2) leverage the interactions between gut microbiota, brain and sleep to develop new intervention strategies for at-risk infants.<br><br>ETHICS AND DISSEMINATION: The NapBiome trial has received ethical approval by the Committee of Northwestern and Central Switzerland and Canton Vaud, Switzerland (#2024-01681). Outcomes will be disseminated through publication and will be presented at scientific conferences. Metagenomic data will be shared through the European Nucleotide Archive.<br><br>TRIAL REGISTRATION NUMBER: The US National Institutes of Health NCT06396689.}, }
@article {pmid40032028, year = {2025}, author = {Ismaiah, MJ and Lo, EKK and Chen, C and Tsui, JS and Johnson-Hill, WA and Felicianna,  and Zhang, F and Leung, HKM and Oger, C and Durand, T and Lee, JC and El-Nezami, H}, title = {Alpha-aminobutyric acid administration suppressed visceral obesity and modulated hepatic oxidized PUFA metabolism via gut microbiota modulation.}, journal = {Free radical biology &amp; medicine}, volume = {232}, number = {}, pages = {86-96}, doi = {10.1016/j.freeradbiomed.2025.02.029}, pmid = {40032028}, issn = {1873-4596}, mesh = {*Gastrointestinal Microbiome/drug effects ; Animals ; *Fatty Acids, Unsaturated/metabolism ; Diet, High-Fat/adverse effects ; *Liver/metabolism/drug effects/pathology ; Male ; *Obesity, Abdominal/drug therapy/metabolism/microbiology/pathology ; Lipid Metabolism/drug effects ; Mice ; Oxidation-Reduction ; Mice, Inbred C57BL ; }, abstract = {BACKGROUND: High-fat diet (HFD) is associated with visceral obesity due to disruption in the lipid metabolism and gut dysbiosis. These symptoms may contribute to hepatic steatosis and the formation of oxidized polyunsaturated fatty acids (PUFAs). Alpha-aminobutyric acid (ABA) is an amino-acid derived metabolite, and its concentration has been correlated with several metabolic conditions and gut microbiome diversity while its direct effects on visceral obesity, lipid metabolism and the gut microbiota are not well understood. This study was designed to investigate the effect of physiological dose of ABA on diet-induced visceral obesity and lipid metabolism dysregulation by examining the fatty acids and oxidized PUFAs profile in the liver as well as the gut microbiota.<br><br>RESULTS: ABA administration reduced visceral obesity by 28&#xa0;% and lessened adipocyte hypertrophy. The expression of liver Cd36 was lowered by more than 50&#xa0;% as well as the saturated and monounsaturated FA concentration. Notably, the desaturation index for C16 and C18 FAs that are correlated with adiposity were reduced. The concentration of several DHA-derived oxidized PUFAs were also enhanced. Faecal metagenomics sequencing revealed enriched abundance of Leptogranulimonas caecicola and Bacteroides sp. ZJ-18 and were positively correlated with several DHA- and ALA-derived oxidized PUFAs in ABA group.<br><br>CONCLUSION: Our study revealed the modulatory effect of physiological dose of ABA on attenuating visceral obesity, reducing hepatic steatosis, and promoting the production of anti-inflammatory oxidized PUFAs that were potentially mediated by the gut microbiota.}, }
@article {pmid40030030, year = {2025}, author = {Ghimire, S and Lehman, PC and Aguilar Meza, LS and Shahi, SK and Hoang, J and Olalde, H and Paullus, M and Cherwin, C and Wang, K and Gill, C and Cho, T and Mangalam, AK}, title = {Specific microbial ratio in the gut microbiome is associated with multiple sclerosis.}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {122}, number = {10}, pages = {e2413953122}, pmid = {40030030}, issn = {1091-6490}, support = {T32 AI007260/AI/NIAID NIH HHS/United States ; P30 ES005605/ES/NIEHS NIH HHS/United States ; I01 CX002212/CX/CSRD VA/United States ; R01AI137075//HHS | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; R01 AI137075/AI/NIAID NIH HHS/United States ; T32AI007260//HHS | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; 1I01CX002212//U.S. Department of Veterans Affairs (VA)/ ; }, mesh = {*Gastrointestinal Microbiome/genetics ; *Multiple Sclerosis/microbiology ; Animals ; Mice ; Humans ; Encephalomyelitis, Autoimmune, Experimental/microbiology ; Female ; Feces/microbiology ; Male ; Akkermansia/isolation &amp; purification ; Adult ; Dysbiosis/microbiology ; Middle Aged ; Mice, Inbred C57BL ; Bifidobacterium/isolation &amp; purification ; Prevotella ; Disease Models, Animal ; }, abstract = {Gut microbiota dysbiosis is associated with multiple sclerosis (MS), but the causal relationship between specific gut bacteria and MS pathogenesis remains poorly understood. Therefore, we profiled the stool microbiome of people with MS (PwMS) and healthy controls (HC) using shotgun metagenomic sequencing. PwMS showed a distinct microbiome compared to HC, with Prevotella copri (PC) and Blautia species as drivers of microbial communities in HC and PwMS, respectively. Administration of MS-driving Blautia species (Blautia wexlerae; BW) to mice resulted in increased levels of gut inflammatory markers and altered microbiota with increased capacity to induce proinflammatory cytokines. Utilizing experimental autoimmune encephalomyelitis (EAE), an animal model of MS, we identified a lower gut Bifidobacterium to Akkermansia ratio as a hallmark of the disease. BW-administered mice also showed a lower Bifidobacterium to Akkermansia ratio pre-EAE induction which correlated with increased disease severity post-EAE induction. The importance of the Bifidobacterium to Akkermansia ratio at the species level, lower Bifidobacterium adolescentis to Akkermansia muciniphila (BA:AM), was validated in our MS cohort and a large International Multiple Sclerosis Microbiome Study. Thus, our findings highlight the BA:AM ratio as a potential gut microbial marker in PwMS, opening avenues for microbiome-based diagnosis, prognosis, and therapy in MS.}, }
@article {pmid40028749, year = {2025}, author = {Salahi, A and Abd El-Ghany, WA}, title = {A Spotlight on Archaea in Humans, Livestock and Poultry: A Review.}, journal = {Veterinary medicine and science}, volume = {11}, number = {2}, pages = {e70263}, pmid = {40028749}, issn = {2053-1095}, mesh = {*Archaea/physiology ; Animals ; Humans ; *Livestock/microbiology ; *Poultry/microbiology ; *Gastrointestinal Microbiome ; Probiotics ; }, abstract = {The microbiota includes prokaryotes (archaea and bacteria) and eukaryotes. Archaea are single-celled prokaryotes and essential part of gut microbiome. Researches on archaea in ruminants and humans are more than mono-gastric. The low abundance of archaea in the gut depends on the method used (metagenomics or meta-transcriptomic) and age of people or poultry. The lack of complete recognition of archaea is due to their small number and method of identifying them (16S rRNA gene primers). The uses of archaea include analytical kit, reduce oil pollution, archaeosomes or drugs production, vaccines agents, lipid carriers in the pharmaceutical industry and molybdenum extraction in the nuclear industry. The nutritional functions of methanogenic archaea including feed utilization (ruminants) and efficiency, hydrogen reducing (human), fat deposition and enhancement of energy harvesting in mice, CAZymes genes, cecal fermentation, syntrophic potential, carotenoid source and improved transit time and appetite and SCFAs production. Archaea acting as antibiotics (produce archaeocins, sulfolobicins and halocin KPS1) and as probiotics (archaeobiotics) can reduce TMAU (trimethylaminuria) disease, cardiovascular diseases (CVDs), and atherosclerosis, brain abscess, cancer, colorectal cancer, inflammatory bowel disease (IBD), constipation, obesity, food allergies, asthma and anti-inflammation which can be prevented by using archaea, and other functions include energy homeostasis, heat shock protein (HSP) production and reducing aging.}, }
@article {pmid40025399, year = {2025}, author = {Liu, A and Wu, J and Li, J and Li, Q and Zhao, N and Hu, K and Liu, S and Blaiotta, G and Zhou, J}, title = {Uncovering the microbial community dynamics and metabolic pathways of primary organic acids in Sichuan Baoning vinegar through metagenomics.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {41}, number = {3}, pages = {91}, pmid = {40025399}, issn = {1573-0972}, support = {No. 2024NSFSC2079//Science and Technology Department of Sichuan Province/ ; }, mesh = {*Acetic Acid/metabolism ; *Metagenomics/methods ; Fermentation ; China ; *Metabolic Networks and Pathways ; Lactic Acid/metabolism ; *Microbiota/genetics ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Phylogeny ; Lactobacillus/metabolism/genetics ; }, abstract = {Sichuan Baoning vinegar, a renowned traditional vinegar in China, exhibits a higher lactic acid content compared to acetic acid. The microbiota plays a crucial role in shaping the unique flavor of vinegar, but the species-level succession of key microorganisms and metabolic pathways of major organic acids in this vinegar are still unclear. This study utilized metagenomic sequencing to elucidate microbial succession during fermentation and the functional roles of the microbial community, as well as explore the metabolic network of lactic acid and acetic acid. Our findings revealed that bacteria dominated the fermentation process, with Acetilactobacillus jinshanensis, Lactobacillus amylovorus, and Limosilactobacillus sp. emerging as the top three species. Notably, Acetilactobacillus jinshanensis, Limosilactobacillus sp., Lactobacillus amylovorus, and Limosilactobacillus pontis were key players in lactic acid production, while acetic acid synthesis might be primarily driven by Lactobacillus amylovorus, Limosilactobacillus sp., Lactobacillus acetotolerans, and Acetobacter pasteurianus. This study enhances our understanding of the key microorganisms and organic acids metabolism in vinegar, shedding light on the fermentation mechanism of cereal vinegar.}, }
@article {pmid40025082, year = {2025}, author = {Regmi, R and Anderson, J and Burgess, L and Mangelson, H and Liachko, I and Vadakattu, G}, title = {Shotgun and Hi-C Sequencing Datasets for Binning Wheat Rhizosphere Microbiome.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {367}, pmid = {40025082}, issn = {2052-4463}, mesh = {*Triticum/microbiology ; *Rhizosphere ; *Microbiota ; Metagenome ; Metagenomics/methods ; *Soil Microbiology ; High-Throughput Nucleotide Sequencing ; Australia ; }, abstract = {Binning is a crucial process in metagenomics studies, where sequenced reads are combined to form longer contigs and assigned to individual genomes. Conventional methods, such as shotgun binning, rely on similarity measurements and abundance profiles across multiple samples. However, cost constraints for sequencing and limited sample collection capacity hinder their effectiveness. High-throughput chromosome conformation capture (Hi-C), a DNA proximity ligation technique, has been adapted to accurately bin metagenome-assembled genomes (MAGs) from a single sample, addressing challenges like chimeric MAGs. In this study, we generated over 190 Gb of metagenomic data from wheat rhizospheres grown in two highly calcareous soils of South Australian region and compared conventional and Hi-C binning methods. Two shotgun metagenomes and Hi-C libraries were generated, assembling 1089 shotgun MAGs across 39 bacterial and one archaeal taxon, including 94 Hi-C based bins. Binning performed using only short read sequences was prone to high contamination, while the addition of Hi-C binning improved MAG quality and identified mobile element-host-infection interaction. This dataset provides important tools for studying microbial communities in wheat rhizosphere soils.}, }
@article {pmid40024121, year = {2025}, author = {Woo, SY and Park, SB and Lee, SY and Sul, WJ and Chun, HS}, title = {Mycotoxin and microbiome profiling for aflatoxin control in the Korean traditional fermented soybean paste Doenjang.}, journal = {Journal of hazardous materials}, volume = {490}, number = {}, pages = {137777}, doi = {10.1016/j.jhazmat.2025.137777}, pmid = {40024121}, issn = {1873-3336}, mesh = {*Aflatoxins/analysis ; *Microbiota ; Republic of Korea ; Aspergillus/genetics/isolation &amp; purification ; *Glycine max/microbiology ; Penicillium/genetics ; *Food Contamination/prevention &amp; control/analysis ; *Soy Foods/analysis/microbiology ; Fermentation ; *Fermented Foods/microbiology/analysis ; Food Microbiology ; }, abstract = {Mycotoxin contamination is an important concern in producing traditional fermented soybean paste, though no effective control strategy has been developed. This study investigated the mycotoxin profiles of the intermediate (fermented soybean brick, known as "Meju" in South Korea) and final soybean paste products ("Doenjang") to identify major contaminants and describe microbial diversity with the mycotoxins. Profiling of 323 Meju and Doenjang samples revealed severe aflatoxin (AF) contamination. Metagenomic analysis revealed that the species richness and phylogenetic diversity were significantly higher in AF-free than in AF-contaminated Meju and Doenjang. Certain Aspergillus and Penicillium species were more abundant in AF-free than in AF-contaminated Meju and Doenjang. To control AF levels, we developed a novel mycotoxin-reduction approach that preserves the indigenous microbiome by backslopping fermentation of Meju in both Aspergillus-dominant and Penicillium-dominant modes. Both treatments reduced AF levels by > 95 % at a backslopping rate of > 2.5 %. Our results suggested that backslopping fermentation can effectively reduce AF contamination in traditional soybean fermentation, maintaining food safety standards and artisanal practices.}, }
@article {pmid40023383, year = {2025}, author = {Zhang, Y and Zhang, H and Zhang, B}, title = {Biological and terrestrial influences on dissolved organic matter in Antarctic surface waters: Insights from mass spectrometry and metagenomic analysis.}, journal = {Environmental research}, volume = {273}, number = {}, pages = {121252}, doi = {10.1016/j.envres.2025.121252}, pmid = {40023383}, issn = {1096-0953}, mesh = {Antarctic Regions ; Metagenomics ; Mass Spectrometry ; *Environmental Monitoring ; *Lakes/chemistry ; Animals ; Spheniscidae ; Organic Chemicals/analysis ; }, abstract = {Global warming increases the surface waters and biodiversity in polar regions. However, the intrinsic biological sources of dissolved organic matter (DOM) in Antarctic surface waters remain poorly understood. This work evaluated the sources and driving mechanisms of DOM in Antarctic lakes systematically, based on fluorescence excitation-emission matrices, ultrahigh-resolution mass spectra, biological detection, and metagenomic analyses. The most abundant DOM in the water was peptides (37.02%), which differed from those in soil (lignins: 26.33%) and penguin guano (lipids: 50.71%). The relative abundance of CHON and CHOP compounds in water was significantly correlated with the distance from the penguin colony (p < 0.05). Both the fluorescence and mass spectrum fingerprints of water and soil/faeces showed low similarities using end-member source tracking methods. This could be attributed to the facilitation of guano-derived nutrients to phytoplankton proliferation, whereas the concentrations of NH4[+]-N, NO3[-]-N, total phosphorus, and total organic carbon were significantly higher in the penguin-intensive area than in the other areas. Algae had significant positive effects on carbohydrates and amino sugars and positive effects on lignins, compared to zooplankton and bacteria. Zooplankton had significantly more positive effects on peptides than phytoplankton. Secondary bacterial metabolic activity can be positively linked with CHO compounds. Carbohydrates and amino sugars co-occurred with carbohydrate-active enzyme genes and nitrogen cycling genes in one module of the co-occurrence network, whereas the other module was characterised by the co-occurrence patterns of condensed aromatic structures with carbohydrate-active enzyme genes and nitrogen cycling genes. These results emphasise the roles of secondary metabolites from algae and bacteria in species-specific sources of DOM, shedding light on the driving mechanisms of the biogeochemical cycling of DOM in the Antarctic water environment.}, }
@article {pmid40023333, year = {2025}, author = {Liu, H and Zhou, Z and Long, C and Qing, T and Feng, B and Zhang, P and Chen, YP}, title = {Light/dark synergy enhances cyanophycin accumulation in algal-bacterial consortia: Boosted strategy for nitrogen recovery from wastewater.}, journal = {Bioresource technology}, volume = {425}, number = {}, pages = {132309}, doi = {10.1016/j.biortech.2025.132309}, pmid = {40023333}, issn = {1873-2976}, mesh = {*Nitrogen/isolation &amp; purification/metabolism ; *Wastewater/chemistry/microbiology ; *Light ; *Microbial Consortia ; *Bacterial Proteins/metabolism/biosynthesis ; *Bacteria/metabolism ; }, abstract = {Recovering the nitrogen-rich biopolymer cyanophycin [(β-Asp-Arg)n] from algal-bacterial consortia enhances the reclamation of value-added chemicals from wastewater. However, the modulation of light/dark conditions on cyanophycin accumulation remain unknown. In this study, the trends and mechanisms of cyanophycin synthesis in algal-bacterial consortia under light/dark conditions were investigated. The results showed that cyanophycin production during the dark periods ranged from 137-150 mg/g MLSS (mixed liquid suspended solids), which was 32 %-38 % higher than those during the light period (p < 0.001). Metatranscriptomics results demonstrated that 50 metagenome-assembled genomes contribute to cyanophycin production, with the Planktothrix genus being the dominant contributor. Metabolomics findings suggested that algal-bacterial consortia produce higher level of arginine for cyanophycin synthesis under light conditions. This study demonstrates the feasibility of increasing cyanophycin production by merging light/dark cycles, and offers a novel strategy for high yield of valuable biopolymers from wastewater substrate.}, }
@article {pmid40023235, year = {2025}, author = {Fang, J and Yin, B and Wang, X and Pan, K and Wang, WX}, title = {Clamworm bioturbation reduces mercury methylation through alteration of methylator composition in sediment.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {371}, number = {}, pages = {125947}, doi = {10.1016/j.envpol.2025.125947}, pmid = {40023235}, issn = {1873-6424}, mesh = {Animals ; *Geologic Sediments/chemistry ; *Mercury/metabolism/analysis ; Methylation ; *Water Pollutants, Chemical/metabolism/analysis ; *Methylmercury Compounds/analysis/metabolism ; Environmental Monitoring ; Microbiota ; Polychaeta ; }, abstract = {Coastal sediment has been recognized as a hotspot of mercury (Hg) methylation and acts as an important reservoir for Hg-methylating microbes. The bioturbation behaviors of benthic organisms can significantly influence sediment properties and potentially affect the mobility and availability of contaminants within the sediment. However, the effects of bioturbation on Hg speciation and disposition in sediment have not been well addressed. This study investigated the influence of clamworm activities on the Hg-methylation process and the composition of methylators in sediment. The results showed that the presence of clamworms greatly suppressed the growth of Hg-methylators and led to a significant decrease in the production rate of methylmercury (MeHg) (from 0.61 to 0.36 ng g[-1] dw d[-1]). Metagenomic results indicate that bioturbation significantly decreased the abundance and diversity of putative Hg methylators and altered the dominant contributors to Hg methylation process. Furthermore, clamworm activities influenced the metabolic traits of Hg methylators and shifted the community toward greater oxygen tolerance. Overall, bioturbation by clamworms suppressed the Hg methylation process and increased the abundance of eco-friendly microbiome, which ultimately contributed to making the sedimentary ecosystem more diverse and resilient. These findings highlight the vital role of bioturbation in mitigating MeHg contamination in sediment and provide a deeper understanding of Hg-methylating microbes and the Hg cycling processes in coastal environments.}, }
@article {pmid40022370, year = {2025}, author = {Li, X and You, Y and Xue, B and Chen, J and Du, M and Ibrahim, A and Suo, H and Zhang, F and Zheng, J}, title = {Decoding microbiota and metabolite transformation in inoculated fermented suansun using metagenomics, GC-MS, non-targeted metabolomics, and metatranscriptomics:Impacts of different Lactobacillus plantarum strains.}, journal = {Food research international (Ottawa, Ont.)}, volume = {203}, number = {}, pages = {115847}, doi = {10.1016/j.foodres.2025.115847}, pmid = {40022370}, issn = {1873-7145}, mesh = {*Lactobacillus plantarum/metabolism/genetics ; *Metagenomics/methods ; *Metabolomics/methods ; Fermentation ; *Fermented Foods/microbiology ; Gas Chromatography-Mass Spectrometry ; *Microbiota ; Food Microbiology ; Taste ; Odorants/analysis ; }, abstract = {Using metagenomics, GC-MS, non-targeted metabolomics, and metatranscriptomics, we investigated the microbial communities and metabolites in two different Lactobacillus plantarum fermentations. Metagenomics revealed Weissella cibaria dominantly contributed to the DACN766-fermented suansun (LPS1) and Lactiplantibacillus pentosus to the DACN760-fermented suansun (LPS2). GC-MS identified 38 and 40 flavor compounds in LPS1 and LPS2, respectively, with p-cresol, 4-hydroxybenzaldehyde, acetic acid, hexanal, and propionic acid crucial for aroma development. LPS2 exhibited higher levels of p-cresol and acetic acid, contributing to its stronger sour and pungent flavors, which was achieved by regulating many metabolisms like glycolysis and tyrosine metabolism. In contrast, Weissella cibaria plays a role in mitigating off-flavors, resulting in a milder flavor profile in LPS1. Non-targeted metabolomics indicated 70.78% of differential metabolites were upregulated in LPS1. Conversely, the elevated expression of tryptophan and tyrosine underscores the more pronounced sour and odor-producing characteristics observed in LPS2. Metatranscriptomics highlighted the regulation of genes like XFA, XFT, and XFM, which inhibit the formation of the precursors of p-cresol and indole in LPS2. This integrated multi-omics analysis provides deep insights into the fermentation dynamics, facilitating the targeted selection of Lactobacillus plantarum strains with flavor-regulating capabilities.}, }
@article {pmid40022356, year = {2025}, author = {Li, Y and Wu, Y and Chen, S and Zhao, Y and Li, C and Xiang, H and Wang, D and Wang, Y}, title = {Decoding the aroma landscape of fermented golden pompano: The interplay of ester compounds and symbiotic microbiota as revealed by metagenomics and two-dimensional flavoromics.}, journal = {Food research international (Ottawa, Ont.)}, volume = {203}, number = {}, pages = {115832}, doi = {10.1016/j.foodres.2025.115832}, pmid = {40022356}, issn = {1873-7145}, mesh = {*Metagenomics/methods ; Fermentation ; *Esters/analysis/metabolism ; Volatile Organic Compounds/analysis ; *Odorants/analysis ; *Fermented Foods/microbiology/analysis ; Taste ; *Microbiota ; Animals ; Food Microbiology ; *Seafood/microbiology/analysis ; Flavoring Agents/analysis ; Symbiosis ; }, abstract = {Fermented pompano (Trachinotus ovatus) is a traditionally popular fermented seafood throughout Asia. Its distinctive flavor profile is primarily attributed to the microbial metabolic conversion of nutrients, which produces specific volatile compounds. Two-dimensional flavoromics of mature pompano revealed that various volatile flavor compounds accumulate throughout fermentation, with fruity (predominantly esters) and oleogustus (primarily ketones) being key flavor markers. S-curve analysis further demonstrated synergistic and additive interactions between these compounds, which enhance flavor release. Metagenomics and Kyoto Encyclopedia of Genes and Genome analysis revealed that amino acid metabolism was the pivotal pathway for ethyl ester synthesis, with Staphylococcus equorum being positively correlated with esters such as ethyl isobutyrate and ethyl enanthate. This study elucidated the interrelationship between flavor compounds and the microbial community in fermented pompano, which is expected to provide insights into flavor modulation and guide the selection of strains that produce key esters in fermented seafood products.}, }
@article {pmid40022320, year = {2025}, author = {Cámara-Martos, F and Bolívar, A and Rabasco-Vílchez, L and Lafont-Déniz, F and Luque-Ojeda, JL and Pérez-Rodríguez, F}, title = {Exploring the bioaccessibility, in vitro colonic fermentation, and the impact on the intestinal microbiota of allyl-and benzyl-isothiocyanate from white and Ethiopian mustard.}, journal = {Food research international (Ottawa, Ont.)}, volume = {203}, number = {}, pages = {115781}, doi = {10.1016/j.foodres.2025.115781}, pmid = {40022320}, issn = {1873-7145}, mesh = {*Gastrointestinal Microbiome/drug effects ; *Mustard Plant/chemistry ; *Fermentation ; *Isothiocyanates/metabolism/analysis/pharmacokinetics ; Ethiopia ; *Colon/microbiology/metabolism ; Digestion ; Biological Availability ; Gas Chromatography-Mass Spectrometry ; Glucosinolates/metabolism ; Humans ; *Allyl Compounds/metabolism ; Bacteria/metabolism ; }, abstract = {The aim of this research was to study the formation and bioaccessibility of allyl- and benzyl-isothiocyanate (ITC) resulting from the gastrointestinal digestion (small and large intestine) of green parts from Ethiopian and white mustard. In addition, a GC-MS methodology was validated to determine these compounds in bioaccessible and non-bioaccessible fraction. Plant clumps were divided into two batches: fresh and freeze-dried samples. ITC bioaccessibility was low in the small intestine, with values ranged between 11 and 53 % and mean values of 26 %. These results are in agreement with the fact that ITCs are poorly water-soluble compounds. Bioaccessibility values for lyophilised samples were lower than those obtained in fresh samples. This could be due to the degradation of the precursor glucosinolates (sinigrin and glucotropaeolin respectively). The simulation of the colonic fermentation reduced allyl - and benzyl - ITC levels from the non-bioaccessible fraction of Ethiopian and white mustard (values between 0.009 and 0.087 mg/g). In both cases, ITCs concentration dropped dramatically, i.e. with a ten-fold reduction. Nevertheless, this result does not necessarily indicate that ITCs have not been produced in the large intestine. Bacterial microbiota plays a key role in generating ITCs; however, ITCs are not always the final products of this process. The metagenomic analysis of colonic samples revealed that ITCs and cruciferous matrix significantly influenced the composition of gut microbiota, inhibiting potentially pathogenic bacteria such as Enterobacter and Klebsiella, while promoting beneficial bacteria such as Bifidobacterium, Faecalibacterium, Blautia, and Ruminococcus. Interestingly, ITCs-rich environments selected bacterial species (i.e. Enterobacter ludwigii) and promoted metabolic pathways involved in glucosinolate/ITCs metabolism.}, }
@article {pmid40022204, year = {2025}, author = {Debray, R and Dickson, CC and Webb, SE and Archie, EA and Tung, J}, title = {Shared environments complicate the use of strain-resolved metagenomics to infer microbiome transmission.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {59}, pmid = {40022204}, issn = {2049-2618}, support = {R01 AG071684/AG/NIA NIH HHS/United States ; R61 AG078470/AG/NIA NIH HHS/United States ; R61AG078470//National Science Foundation/ ; R01AG071684/NH/NIH HHS/United States ; }, mesh = {Animals ; Humans ; *Bacteria/classification/genetics/isolation &amp; purification ; Fecal Microbiota Transplantation ; Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; Metagenome/genetics ; *Metagenomics/standards ; Papio/microbiology ; *Social Behavior ; *Environmental Microbiology ; Female ; Diet ; Rain ; }, abstract = {BACKGROUND: In humans and other social animals, social partners have more similar microbiomes than expected by chance, suggesting that social contact transfers microorganisms. Yet, social microbiome transmission can be difficult to identify based on compositional data alone. To overcome this challenge, recent studies have used information about microbial strain sharing (i.e., the shared presence of highly similar microbial sequences) to infer transmission. However, the degree to which strain sharing is influenced by shared traits and environments among social partners, rather than transmission per se, is not well understood.<br><br>RESULTS: Here, we first use a fecal microbiota transplant dataset to show that strain sharing can recapitulate true transmission networks under ideal settings when donor-recipient pairs are unambiguous and recipients are sampled shortly after transmission. In contrast, in gut metagenomes from a wild baboon population, we find that demographic and environmental factors can override signals of strain sharing among social partners.<br><br>CONCLUSIONS: We conclude that strain-level analyses provide useful information about microbiome similarity, but other facets of study design, especially longitudinal sampling and careful consideration of host characteristics, are essential for inferring the underlying mechanisms of strain sharing and resolving true social transmission network. Video Abstract.}, }
@article {pmid40022097, year = {2025}, author = {Ferneyhough, B and Roddis, M and Millington, S and Quirk, J and Clements, C and West, S and Schilizzi, R and Fischer, MD and Parkinson, NJ}, title = {A highly accurate nanopore-based sequencing workflow for culture and PCR-free microbial metagenomic profiling of urogenital samples.}, journal = {BMC urology}, volume = {25}, number = {1}, pages = {41}, pmid = {40022097}, issn = {1471-2490}, mesh = {Female ; Male ; Humans ; *Metagenomics/methods ; *Microbiota/genetics ; *Nanopore Sequencing/methods ; Workflow ; *Vagina/microbiology ; *Urogenital System/microbiology ; }, abstract = {BACKGROUND: The application of molecular sequencing methods for microbiome profiling of biological samples are largely restricted to research use. However, they require significant resources such as time and cost and can suffer from amplification biases that may hamper interpretation of complex systems. These issues are also a barrier to adoption as standard clinical tools in, for example, diagnosis of urogenital infections. We report a new method that utilises third generation long-read nanopore sequencing to produce fast, accurate and fully quantitated metagenomic microbiome profiles. Here, as proof of principle, we apply this methodology to reassess the healthy urogenital microbiomes of asymptomatic female and male samples.<br><br>RESULTS: We show that our method is capable of accurately and reproducibly detecting both levels and composition of a synthetic mixture of ten species comprising known amounts of hard to lyse gram-positive bacteria, gram-negative bacteria and yeast. When applied to urogenital samples, we confirm previous observations that the female asymptomatic vaginal and urinary microbiomes are predominated by Gardnerella spp. or one of several Lactobacillus species (L. crispatus, L. gasseri, L. iners or L. jensenii) that conform to previously defined community state types. We show the tight relationship between vaginal and urinary populations of the same individual at both species and strain level, provide evidence for the previously observed dynamic nature of these microbiomes over a menstrual cycle and compare biomass and complexity of male and female urobiomes.<br><br>CONCLUSIONS: We set out to develop an unbiased, amplification and culture-free, fully quantitative metagenomic microbiome profiling tool. Our initial observations suggest our method represents a viable alternative to existing molecular research tools employed in the analysis of complex microbiomes.}, }
@article {pmid40021694, year = {2025}, author = {Gambardella, N and Costa, J and Martins, BM and Folhas, D and Ribeiro, AP and Hintelmann, H and Canário, J and Magalhães, C}, title = {The role of prokaryotic mercury methylators and demethylators in Canadian Arctic thermokarst lakes.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {7173}, pmid = {40021694}, issn = {2045-2322}, support = {PTDC/CTA-AMB/4744/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e a Tecnologia/ ; }, mesh = {*Lakes/microbiology/chemistry ; Arctic Regions ; Canada ; *Mercury/metabolism/analysis ; *Methylmercury Compounds/metabolism/analysis ; Permafrost/microbiology/chemistry ; Methylation ; Microbiota ; *Bacteria/genetics/metabolism ; Geologic Sediments/microbiology ; Metagenomics ; Seasons ; }, abstract = {Permafrost soils are critical reservoirs for mercury (Hg), with the thawing process leading to the release of this element into the environment, posing significant environmental risks. Of particular concern is the methylated form of mercury, monomethylmercury (MMHg), known for its adverse effects on Human health. Microbial communities play a pivotal role in the formation of MMHg by facilitating Hg methylation and in the demethylation of MMHg, slowing the crossing of toxic threshold concentration in the environment. However, the specific microbes involved still need to be understood. This study aimed to identify the microbial drivers behind changes in Hg speciation (MMHg and Hg) in permafrost thaw lakes and assess the significance of the biotic component in Hg biogeochemistry. Sediment samples from two thermokarst lakes in the Canadian sub-Arctic were collected during the winter and summer of 2022. Gene-centric metagenomics using whole-genome sequencing (WGS) was employed to identify key genes involved in mercury methylation (hgcA and hgcB) and demethylation (merA and merB), supported by qPCR analyses. A seasonal decline in microbial diversity, involved in the Hg methylation, and hgcA gene coverage was observed from winter to summer, mirroring patterns in mercury methylation rates. Notably, hgcA sequences were significantly more abundant than merAB sequences, with contrasting seasonal trends. These results indicate a seasonal shift in the microbial community, transitioning from a dominance of mercury methylation in winter to a predominance of mercury demethylation in summer. Environmental drivers of these dynamics were integrated into a conceptual model. This study provide new insights on the microbial processes influencing the Hg cycle in Arctic permafrost undergoing degradation.}, }
@article {pmid40020468, year = {2025}, author = {Huang, Y and Li, XT and Jiang, Z and Liang, ZL and Liu, W and Liu, ZH and Li, LZ and Yang, ZN and Zhang, GQ and Yin, HQ and Liang, JL and Zhou, N and Liu, SJ and Jiang, CY}, title = {Mineral types dominate microbiomes and biogeochemical cycling in acid mine drainage.}, journal = {Water research}, volume = {278}, number = {}, pages = {123367}, doi = {10.1016/j.watres.2025.123367}, pmid = {40020468}, issn = {1879-2448}, mesh = {*Mining ; *Microbiota ; Archaea/genetics ; *Minerals ; Bacteria/genetics ; Metagenome ; Metagenomics ; }, abstract = {Acid mine drainage (AMD) environments are typically used as models to study the crucial roles of acidophilic microbes in aquatic environments. Nevertheless, knowledge regarding microbial-driven biogeochemical cycling across mining regions remains limited. In this study, a metagenomics-based approach was employed to explore the diversity, composition, and ecological functions of microbiomes in global AMD environments with different mineral types. A total of 226 metagenomes, covering 12 mineral types of AMD, were analyzed. As a result, 2114 microbial metagenome-assembled genomes (MAGs) were obtained, representing members from 33 bacterial phyla and 8 archaeal phyla. The core taxa and functional groups in AMDs were identified. Additionally, twelve bacterial and two archaeal lineages were discovered for the first time in AMD environments. The specific metabolic potentials of these genomes were also determined. Our results revealed a high level of specialization in the diversity structures and ecological functions of AMD microbial communities based on mineral-type conditions. Mineral type significantly contributed to the dissimilarity in the AMD microbiomes, especially in water environments, underscoring the pivotal role of mineral types in shaping the microbial community in the AMD environment. Collectively, these findings provide novel perspectives on the ecology and metabolism of microbiomes in extreme AMD environments globally.}, }
@article {pmid40020294, year = {2025}, author = {Zhao, Y and Li, L and Tan, J and Zhao, H and Wang, Y and Zhang, A and Jiang, L}, title = {Metagenomic insights into the inhibitory effect of phytochemical supplementation on antibiotic resistance genes and virulence factors in the rumen of transition dairy cows.}, journal = {Journal of hazardous materials}, volume = {490}, number = {}, pages = {137717}, doi = {10.1016/j.jhazmat.2025.137717}, pmid = {40020294}, issn = {1873-3336}, mesh = {Animals ; Cattle ; *Rumen/microbiology ; Metagenomics ; *Virulence Factors/genetics ; *Phytochemicals/pharmacology ; *Dietary Supplements ; *Drug Resistance, Microbial/genetics/drug effects ; Female ; *Flavanones/pharmacology ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; Genes, Bacterial ; Microbiota/drug effects ; Gastrointestinal Microbiome/drug effects ; Bacteria/genetics/drug effects ; Animal Feed ; }, abstract = {Antimicrobial resistance (AMR) is a major global health concern, with the rumen microbiota of dairy cows serving as an important reservoir for antibiotic resistance genes (ARGs) and virulence factors (VFs). This study explores the impact of dietary phytochemical supplementation on the rumen resistome and virulome of transition dairy cows using metagenomic sequencing. Naringin supplementation reduced the abundance of ARGs by up to 9.0 % and VFs by up to 7.2 % during the transition period, as indicated by metagenomic analysis (P < 0.05). Clinically high-risk ARGs, including those conferring resistance to beta-lactams (mecA), tetracyclines (tetM, tetO), and aminoglycosides (rmtF), were notably downregulated (P < 0.05). Virulence factors associated with adherence, secretion systems, and toxins were also significantly decreased (P < 0.05). Naringin altered the microbial community structure, particularly reducing the abundance of Proteobacteria, a key phylum harboring ARGs and VFs. Despite inducing increased ARG-VF network complexity, naringin supplementation promoted a less pathogenic microbiome with reduced resistance potential. These findings demonstrate the potential of naringin as a natural dietary strategy to mitigate AMR by reducing the risk of ARG and VF dissemination into the environment, while supporting rumen microbiota stability in transition dairy cows.}, }
@article {pmid40020117, year = {2025}, author = {Zheng, X and Fan, J and Yin, J and Chu, Y}, title = {The role of gut microbiota and plasma metabolites in ulcerative colitis: Insights from Mendelian randomization analysis.}, journal = {Medicine}, volume = {104}, number = {9}, pages = {e41710}, pmid = {40020117}, issn = {1536-5964}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Colitis, Ulcerative/microbiology/blood/genetics ; Mendelian Randomization Analysis ; Genome-Wide Association Study ; Male ; Female ; Middle Aged ; Longitudinal Studies ; Canada ; }, abstract = {Emerging research suggests that alterations in gut microbiota composition may play a significant role in the pathogenesis of ulcerative colitis (UC). Plasma metabolites, which are influenced by gut microbiota, have also been implicated, but their role in UC remains unclear. This study aims to determine whether specific plasma metabolites mediate the causal relationship between gut microbiota and UC using Mendelian randomization (MR) analysis. This study employed publicly available summary-level data from genome-wide association studies and metagenomic datasets. Gut microbiota data were derived from the FINRISK cohort (5959 participants), plasma metabolite data from the Canadian Longitudinal Study on Aging (8299 individuals), and UC data from multiple consortia (17,030 cases and 883,787 controls). Forward and reverse MR analyses, supplemented by linkage disequilibrium score regression (LDSC), were conducted to assess causal relationships. Mediation effects of plasma metabolites between gut microbiota and UC were analyzed using the product of coefficients method. Various sensitivity analyses, including MR-Egger and MR-PRESSO, were applied to detect pleiotropy and ensure robust results. The study identified 20 bacterial taxa and 93 plasma metabolites linked to UC. Forward MR analysis showed that Clostridium S felsineum increased UC risk via reduced carnitine levels, with a mediation proportion of 39.77%. Eubacterium callanderi was associated with decreased UC risk through the tryptophan to pyruvate ratio (16.02% mediation). Additionally, species CAG-590 sp000431135 increased UC risk through elevated mannitol/sorbitol levels, mediating 28.38% of the effect. Sensitivity analyses confirmed the robustness of these findings, with minimal heterogeneity and pleiotropy detected. This study highlights the significant role of gut microbiota and their associated plasma metabolites in the pathogenesis of UC. Specific microbial species influence UC through metabolites, suggesting potential therapeutic targets. Modulating carnitine, tryptophan metabolism, or sugar alcohols could offer promising avenues for UC management.}, }
@article {pmid40019271, year = {2025}, author = {Milani, C and Longhi, G and Alessandri, G and Fontana, F and Viglioli, M and Tarracchini, C and Mancabelli, L and Lugli, GA and Petraro, S and Argentini, C and Anzalone, R and Viappiani, A and Carli, E and Vacondio, F and van Sinderen, D and Turroni, F and Mor, M and Ventura, M}, title = {Functional modulation of the human gut microbiome by bacteria vehicled by cheese.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {3}, pages = {e0018025}, pmid = {40019271}, issn = {1098-5336}, support = {GR-2018-12365988//Ministero della Salute (Italy Ministry of Health)/ ; SFI/12/RC/2273a//Science Foundation Ireland (SFI)/ ; SFI/12/RC/2273b//Science Foundation Ireland (SFI)/ ; }, mesh = {*Cheese/microbiology ; Humans ; *Gastrointestinal Microbiome ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Feces/microbiology ; }, abstract = {Since cheese is one of the most commonly and globally consumed fermented foods, scientific investigations in recent decades have focused on determining the impact of this dairy product on human health and well-being. However, the modulatory effect exerted by the autochthonous cheese microbial community on the taxonomic composition and associated functional potential of the gut microbiota of human is still far from being fully dissected or understood. Here, through the use of an in vitro human gut-simulating cultivation model in combination with multi-omics approaches, we have shown that minor rather than dominant bacterial players of the cheese microbiota are responsible for gut microbiota modulation of cheese consumers. These include taxa from the genera Enterococcus, Bacillus, Clostridium, and Hafnia. Indeed, they contribute to expand the functional potential of the intestinal microbial ecosystem by introducing genes responsible for the production of metabolites with relevant biological activity, including genes involved in the synthesis of vitamins, short-chain fatty acids, and amino acids. Furthermore, tracing of cheese microbiota-associated bacterial strains in fecal samples from cheese consumers provided evidence of horizontal transmission events, enabling the detection of particular bacterial strains transferred from cheese to humans. Moreover, transcriptomic and metabolomic analyses of a horizontally transmitted (cheese-to-consumer) bacterial strain, i.e., Hafnia paralvei T10, cultivated in a human gut environment-simulating medium, confirmed the concept that cheese-derived bacteria may expand the functional arsenal of the consumer's gut microbiota. This highlights the functional and biologically relevant contributions of food microbes acquired through cheese consumption on the human health.IMPORTANCEDiet is universally recognized as the primary factor influencing and modulating the human intestinal microbiota both taxonomically and functionally. In this context, cheese, being a fermented food with its own microbiota, serves not only as a source of nourishment for humans, but also as a source of nutrients for the consumer's gut microbiota. Additionally, it may act as a vehicle for autochthonous food-associated microorganisms which undergo transfer from cheese to the consumer, potentially influencing host gut health. The current study highlights not only that cheese microbiota-associated bacteria can be traced in the human gut microbiota, but also that they may expand the functional repertoire of the human gut microbiota, with potentially significant implications for human health.}, }
@article {pmid40018976, year = {2025}, author = {Yu, T and Gao, J and Yuan, J and Yin, Z and Chen, X and Wu, Y and Dai, R and Yan, D and Chen, H and Wu, Y}, title = {Dietary methionine restriction restores wheat gluten-induced celiac-associated small intestine damage in association with affecting butyric acid production by intestinal flora.}, journal = {Food &amp; function}, volume = {16}, number = {6}, pages = {2461-2473}, doi = {10.1039/d4fo05757k}, pmid = {40018976}, issn = {2042-650X}, mesh = {*Methionine/metabolism/administration &amp; dosage/deficiency ; Animals ; *Glutens/adverse effects ; *Celiac Disease/metabolism/diet therapy/microbiology ; Mice, Inbred C57BL ; Mice ; *Intestine, Small/metabolism/pathology/microbiology ; *Triticum/chemistry ; *Gastrointestinal Microbiome ; *Butyric Acid/metabolism ; Male ; Disease Models, Animal ; }, abstract = {Methionine restriction has received some attention in recent years as a novel mode of dietary intervention. Our previous study found that methionine restriction could inhibit the celiac toxic effects of wheat gluten in an in vitro model. However, the role of methionine restriction in gluten-induced celiac intestinal damage remains unclear. The aim of this study was to explore whether dietary methionine restriction could suppress the celiac toxic effects of gluten in an in vivo model, thereby mitigating intestine damage. This study systematically investigated the effects of dietary methionine restriction on celiac characteristic indicators such as symptoms, small intestine damage, and intestinal TG2 and IL-15 expression in a gluten-induced C57BL/6 mouse model. The availability of dietary methionine restriction in different ages (adolescent and adult) was also evaluated. Moreover, mouse cecum contents were assayed and co-analyzed for the metagenome of intestinal flora and target short-chain fatty acid metabolomics, with the goal of further exploring and elucidating critical pathways by which dietary methionine restriction plays a role. We discovered that dietary methionine restriction could effectively ameliorate the gluten-induced celiac-associated small intestine damage by modulating intestinal flora to inhibit butyric acid production. Specifically, dietary methionine restriction could inhibit butyric acid production with the help of s_CAG-485 sp002493045 and s_CAG-475 sp910577815, which in turn affected the mitochondrial function within the intestinal epithelial cells to assist in the repair of intestine damage. This study might provide new insights into modulating dietary patterns to mitigate intestinal damage in celiac disease and the production of novel gluten-free products.}, }
@article {pmid40016914, year = {2025}, author = {Lu, X and Xu, Y and Liu, Y and Li, F and Feng, Q and Gao, C and Liu, D and Zhou, L and Yang, H and Zhang, J and Cui, F and Chen, Q}, title = {Neutrophil Depletion Reduced the Relative Abundance of Unsaturated Long-Chain Fatty Acid Synthesis Microbiota and Intestinal Lipid Absorption.}, journal = {Cell biochemistry and function}, volume = {43}, number = {3}, pages = {e70060}, doi = {10.1002/cbf.70060}, pmid = {40016914}, issn = {1099-0844}, support = {//This work was supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Suzhou Fundamental Research Project (SJC2023001), and Key Laboratory of Radiation Damage and Treatment of Jiangsu Provincial Universities and Colleges. It was funded by the National Natural Science Foundation of China (Grant No. 81773355)./ ; }, mesh = {Animals ; Mice ; *Neutrophils/metabolism/cytology/immunology ; *Intestinal Absorption ; Male ; *Gastrointestinal Microbiome ; Lipid Metabolism ; *Fatty Acids, Unsaturated/biosynthesis ; Mice, Inbred C57BL ; Rats ; *Intestines/microbiology ; }, abstract = {As immune cells, neutrophils serve as the first line of defense against infections; however, the mechanism by which neutrophils regulate lipid metabolism is unknown. The neutrophil depletion group was treated with 100 μg InVivoMAb anti-mouse Ly6G 6 times, whereas the control group mice were intraperitoneally injected with the same quantity of InVivoMAb rat IgG2a. Body fat content, triglycerides (TGs), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C) in the jejunum and ileum, as well as 9 long-chain fatty acids (LCFAs) in the intestinal contents were significantly decreased. Furthermore, genes involved in the absorption of lipids in each segment of the intestine also showed decreased expression. Neutrophil-depletion and control models were administered 25 μCi of [3]H-cholesterol by gavage. The distribution of [3]H cholesterol in the intestinal segment, heart, liver, serum, and feces was not altered by anti-Ly6G antibodies. Metagenomics was applied to investigate uncultured microorganisms in the intestinal contents to identify bacteria containing lipid metabolism genes. At the species level, 12 bacteria were involved in unsaturated LCFA synthesis, among which 2 increased and 10 decreased. The overall relative abundance of these bacteria decreased from 3.102% to 0.734%. Many genes involved in lipid metabolism were also reduced as a result, such as fatty acid synthase and peroxisome proliferator-activated receptor γ. In conclusion, neutrophil depletion does not affect intestinal lipid absorption in the diet but leads to a decrease in the overall relative abundance of gut bacteria involved in unsaturated LCFA synthesis. Consequently, intestinal lipid synthesis and absorption are reduced.}, }
@article {pmid40016544, year = {2025}, author = {Zaminhan-Hassemer, M and Zagolin, GB and Aráujo, BC and Perazza, CA and Barbosa, DA and Menegidio, FB and Coutinho, LL and Tizioto, P and Hilsdorf, AWS}, title = {Effect of green propolis crude extract on the modulation of intestinal microbiota and on the productive performance of juvenile Nile tilapia.}, journal = {Veterinary research communications}, volume = {49}, number = {2}, pages = {120}, pmid = {40016544}, issn = {1573-7446}, mesh = {Animals ; *Propolis/pharmacology/administration &amp; dosage/chemistry ; *Gastrointestinal Microbiome/drug effects ; *Cichlids/growth &amp; development/microbiology ; Dietary Supplements/analysis ; Animal Feed/analysis ; Diet/veterinary ; Bacteria/drug effects/classification ; }, abstract = {The study aimed to investigate the impact of dietary supplementation with green propolis crude extract on juvenile tilapia's growth and intestinal microbiota. The experiment was conducted in raceway tanks with a volume of 19m[3], comprising two treatments with three replicates each. Fish were assigned to either a control diet or a diet supplemented with 0.67% green propolis crude extract. Each experimental unit consisted of 30 fish, initially averaging 22.38 g ± 0.32 in weight, and which were fed ad libitum for 60 days. Results demonstrated that dietary supplementation with green propolis crude extract significantly improved the growth of juvenile tilapia compared to the control group. Firmicutes, Proteobacteria, Verrucomicrobia, Bacteroidetes, and Cyanobacteria were identified as the predominant bacterial phyla in the intestinal microbiota of both groups. The genera Candidatus xiphinematobacter (Verrucomicrobia) and Somerae (Firmicutes) were consistently abundant across treatments, with Somerae and Dispar as the most prevalent species. Significant differences in alpha diversity were observed between treatments at the genus and species levels according to the Chao 1 index. However, no significant differences were detected in Shannon index diversity between the control and green propolis crude extract groups. Beta diversity analysis revealed distinct clustering between treatments. Linear discriminant analysis Effect Size (LEfSe) highlighted significant differences in bacterial abundance between the control and green propolis crude extract groups. In conclusion, dietary supplementation with green propolis crude extract improved growth. It also modulated the intestinal microbiota of juvenile Thai tilapia.}, }
@article {pmid40016229, year = {2025}, author = {Chang, J and Costa, OYA and Sun, Y and Wang, J and Tian, L and Shi, S and Wang, E and Ji, L and Wang, C and Pang, Y and Yao, Z and Ye, L and Zhang, J and Chen, H and Cai, Y and Chen, D and Song, Z and Rong, J and Raaijmakers, JM and Tian, C and Kuramae, EE}, title = {Domesticated rice alters the rhizosphere microbiome, reducing nitrogen fixation and increasing nitrous oxide emissions.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {2038}, pmid = {40016229}, issn = {2041-1723}, mesh = {*Oryza/microbiology/metabolism/genetics ; *Nitrous Oxide/metabolism ; *Rhizosphere ; *Microbiota/genetics ; *Nitrogen Fixation/genetics ; Soil Microbiology ; Plant Roots/microbiology/metabolism ; Domestication ; Metagenomics ; Soil/chemistry ; Nitrogenase/metabolism/genetics ; Bacteria/genetics/metabolism ; Nitrogen/metabolism ; }, abstract = {Crop domestication has revolutionized food production but increased agriculture's reliance on fertilizers and pesticides. We investigate differences in the rhizosphere microbiome functions of wild and domesticated rice, focusing on nitrogen (N) cycling genes. Shotgun metagenomics and real-time PCR reveal a higher abundance of N-fixing genes in the wild rice rhizosphere microbiomes. Validation through transplanting rhizosphere microbiome suspensions shows the highest nitrogenase activity in soils with wild rice suspensions, regardless of planted rice type. Domesticated rice, however, exhibits an increased number of genes associated with nitrous oxide (N2O) production. Measurements of N2O emissions in soils with wild and domesticated rice are significantly higher in soil with domesticated rice compared to wild rice. Comparative root metabolomics between wild and domesticated rice further show that wild rice root exudates positively correlate with the frequency and abundance of microbial N-fixing genes, as indicated by metagenomic and qPCR, respectively. To confirm, we add wild and domesticated rice root metabolites to black soil, and qPCR shows that wild rice exudates maximize microbial N-fixing gene abundances and nitrogenase activity. Collectively, these findings suggest that rice domestication negatively impacts N-fixing bacteria and enriches bacteria that produce the greenhouse gas N2O, highlighting the environmental trade-offs associated with crop domestication.}, }
@article {pmid40015896, year = {2025}, author = {Zheng, R and Peng, J and Li, Q and Liu, Y and Huang, D and Sheng, Y and Liu, C and Qi, L and Keyhani, NO and Tang, Q}, title = {Alterations in microbial community structures and metabolic function in soil treated with biological and chemical insecticides.}, journal = {Pesticide biochemistry and physiology}, volume = {208}, number = {}, pages = {106304}, doi = {10.1016/j.pestbp.2025.106304}, pmid = {40015896}, issn = {1095-9939}, mesh = {*Soil Microbiology ; *Insecticides/pharmacology ; Neonicotinoids/pharmacology ; Metarhizium ; Nitro Compounds/pharmacology ; Ivermectin/analogs &amp; derivatives/pharmacology ; Soil/chemistry ; *Microbiota/drug effects ; }, abstract = {Entomopathogenic fungi show significant promise as effective and ecological friendly alternatives to chemical insecticides for insect pest control. However, little is known concerning their effects on soil ecosystems, especially in comparison to application of chemical insecticides. Here, we examined the effects of one biological and two chemical insecticides, Metarhizium anisopliae, imidacloprid (IMI) and emamectin benzoate (EMB) on microbial community structure, metabolic functioning, and soil biochemistry. Treatment with EMB and IMI, reduced Actinobacteriota populations, while increasing that of Acidobacteriota. However, these populations were not significantly altered under M. anisopliae treatment. Chemical pesticides also altered fungal communities including potential pathogens. Activities of soil beneficial nitrogen-cycling-related enzymes were reduced after application of IMI and EMB, but were increased after treatment with M. anisopliae. Metagenomics analysis showed that IMI treatment reduced levels of carbon and nitrogen-related metabolic pathways. However, M. anisopliae treatment increased representation of key enzymes involved in the carbon, nitrogen, and sulfur cycling important for maintenance of soil fertility. Insecticides treatments altered the abundance of a number antibiotic resistance genes (ARGs) but not virulence factors (VFs), whereas application of M. anisopliae resulted had only minimal effects. These findings highlight the consequences of use of biological vs. chemical pesticides on soil microbiology can affect plant and ecosystem health indicating that the fungal biological control agent, M. anisopliae likely has far less detrimental and potentially beneficial effects on soil ecology as compared to chemical pesticides.}, }
@article {pmid40015021, year = {2025}, author = {Velásquez-Reyes, D and García-Alamilla, P and Kirchmayr, MR and Lugo-Cervantes, E and Gschaedler, A}, title = {Contribution of post-harvest processing in cocoa bean: Chemometric and metagenomic analysis in fermentation step.}, journal = {Food chemistry}, volume = {477}, number = {}, pages = {143458}, doi = {10.1016/j.foodchem.2025.143458}, pmid = {40015021}, issn = {1873-7072}, mesh = {*Cacao/chemistry/microbiology/metabolism ; Fermentation ; *Bacteria/genetics/isolation &amp; purification/metabolism/classification ; Volatile Organic Compounds/metabolism/chemistry/analysis ; Metagenomics ; Mexico ; Food Handling/methods ; Gas Chromatography-Mass Spectrometry ; Microbiota ; Chemometrics ; Fungi/isolation &amp; purification/classification/metabolism/genetics ; Odorants/analysis ; }, abstract = {Cocoa fermentation is a heterogeneous process, exhibiting a high degree of diversity of flavor, aroma, and microbial communities. A study was conducted to examine cocoa fermentations in five municipalities of a region in Mexico, with the objective of associating post-harvest practices, geographic area, and chemical and microbiological profiles. Through the application of high-performance DNA sequencing, the microbial diversity was identified, and the non-volatile and volatile compounds were identified and quantified by UHPLC-RID/PDA and HS-SPME/GC-MS, respectively. Using PCA, PLS regression and Pearson correlation, post-harvest practices, geographical factors, microbial communities, and volatile and non-volatile compounds were made. The absence of control in cocoa fermentation was associated to Aspergillus, Escherichia, and Bacillus, and reduced the production of essential acids for aroma. This study provides data on the diversity of post-harvest practices and their impact on cocoa quality.}, }
@article {pmid40013797, year = {2025}, author = {Bai, Y and Hu, Y and Chen, X and Hu, L and Wu, K and Liang, S and Zheng, J and Gänzle, MG and Chen, C}, title = {Comparative metagenome-associated analysis of gut microbiota and antibiotic resistance genes in acute gastrointestinal injury patients with the risk of in-hospital mortality.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0144424}, pmid = {40013797}, issn = {2379-5077}, support = {200221115835503//the Office of Talent Work Leading Group in Maoming/ ; 2022A1515220065//GDSTC | Basic and Applied Basic Research Foundation of Guangdong Province/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Middle Aged ; *Hospital Mortality ; *Metagenome/genetics ; Aged ; *Drug Resistance, Microbial/genetics ; Prospective Studies ; Metagenomics/methods ; *Gastrointestinal Diseases/microbiology/mortality ; Feces/microbiology ; Intensive Care Units ; Anti-Bacterial Agents/pharmacology ; Bacteria/genetics ; }, abstract = {UNLABELLED: Acute gastrointestinal injury (AGI) is known for its poor long-term prognosis and the associated increase in mortality among intensive care unit (ICU) patients. As the role of the gut microbiome and resistome in AGI remains unclear, the present study aimed to explore the possible associations between dysbacteriosis and in-hospital mortality in ICU patients with gastrointestinal dysfunction. Fecal samples were collected from a prospective cohort of 210 ICU patients with AGI, and shotgun metagenomic sequencing was used to determine the taxonomic composition of gut microbiota and the differences of antibiotic resistance genes (ARGs) between the Death and Survival groups. Compared to the Survival group, patients in the Death group shifted from strict anaerobes to facultative anaerobes in the fecal microbial community, with more Klebsiella but less Prevotella. The co-occurrence patterns revealed that more ARG subtypes were enriched in microbial taxa in the Death group, especially for Clostridium and Methanobrevibacter. Furthermore, the ARG type had large area under the curve (AUCs) in receiver operating characteristic for predicting the disease severity, and a combined gut microbiota-ARG subtype classifiers showed better performance than either of them. Thus, comparative metagenome-associated analysis can help to obtain valuable information about gut microbiota and gene coding for antibiotic resistance in AGI patients.<br><br>IMPORTANCE: A metagenomic-related strategy was conducted to obtain a highly valuable resource to improve understanding of intestinal microbiota dysbiosis and antibiotic resistance genes (ARGs) profiles. The results indicate that intestinal microbiota, including Klebsiella and Prevotella, changed dramatically in intensive care unit (ICU) patients with acute gastrointestinal injury (AGI). Due to longer ICU stays and receiving more antibiotic treatment, the types and correlations of ARGs in the Death group were significantly higher than those in the Survival group. The findings of this study are expected to expand our knowledge of gut microbiota and resistome profiles reflecting gastrointestinal status, accelerate the identification of disease biomarkers, and provide new insights into the prevention and treatment of AGI-related diseases.}, }
@article {pmid40013792, year = {2025}, author = {Qin, Y and Wang, Q and Lin, Q and Liu, F and Pan, X and Wei, C and Chen, J and Huang, T and Fang, M and Yang, W and Pan, L}, title = {Multi-omics analysis reveals associations between gut microbiota and host transcriptome in colon cancer patients.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0080524}, pmid = {40013792}, issn = {2379-5077}, support = {AD22035214//Guangxi Clinical Research Center for Anesthesiology/ ; 2022GXNSFAA035510//National Science Foundation of Guangxi/ ; 8236080196//National Science Foundation of China/ ; 81760530//National Science Foundation of China/ ; 2021M693803//Postdoctoral Science Foundation of China/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Colonic Neoplasms/microbiology/genetics ; *Transcriptome ; Female ; Male ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Aged ; Bacteria/genetics/classification ; Metagenomics ; Multiomics ; }, abstract = {UNLABELLED: Colon cancer (CC) is one of the most common cancers globally, which is associated with the gut microbiota intimately. In current research, exploring the complex interaction between microbiomes and CC is a hotspot. However, the information on microbiomes in most previous studies is based on fecal, which does not fully display the microbial environment of CC. Herein, we collected mucosal and tissue samples from both the tumor and normal regions of 19 CC patients and clarified the composition of mucosal microbiota by 16S rRNA and metagenomic sequencing. Additionally, RNA-Seq was also conducted to identify the different expression genes between tumor and normal tissue samples. We revealed significantly different microbial community structures and expression profiles to CC. Depending on correlation analysis, we demonstrated that 1,472 genes were significantly correlated with CC tumor microbiota. Our study reveals a significant enrichment of Campylobacter jejuni in the mucosa of CC, which correlates with bile secretion. Additionally, we observe a negative correlation between C. jejuni and immune cells CD4+ Tem and mast cells. Finally, we discovered that metabolic bacterial endosymbiont of Bathymodiolus sp., Bacillus wiedmannii, and Mycobacterium tuberculosis had a significant survival value for CC, which was ignored by previous research. Overall, our study expands the understanding of the complex interplay between microbiota and CC and provides new targets for the treatment of CC.<br><br>IMPORTANCE: This study contributes to our understanding of the interaction between microbiota and colon cancer (CC). By examining mucosal and tissue samples rather than solely relying on fecal samples, we have uncovered previously unknown aspects of CC-associated microbiota. Our findings reveal distinct microbial community structures and gene expression profiles correlated with CC progression. Notably, the enrichment of Campylobacter jejuni in CC mucosa, linked to bile secretion, underscores potential mechanisms in CC pathogenesis. Additionally, observed correlations between microbial taxa and immune cell populations offer new avenues for immunotherapy research in CC. Importantly, this study introduces CC-associated microbiota with survival implications for CC, expanding therapeutic targets beyond conventional strategies. By elucidating these correlations, our study not only contributes to uncovering the potential role of gut microbiota in colon cancer but also establishes a foundation for mechanistic studies of gut microbiota in colon cancer, emphasizing the broader impact of microbiota research on cancer biology.}, }
@article {pmid40013791, year = {2025}, author = {Walter, JM and Greses, S and Hagen, LH and Schiml, VC and Pope, PB and González-Fernández, C and Arntzen, M}, title = {Anaerobic digestion of microalgae: microbial response and recovery after organic loading disturbances.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0167424}, pmid = {40013791}, issn = {2379-5077}, support = {101007006//EC | Horizon 2020 Framework Programme (H2020)/ ; 295910//Norges Forskningsr&#xe5;d (Forskningsr&#xe5;det)/ ; }, mesh = {*Microalgae/metabolism ; Anaerobiosis ; *Bioreactors/microbiology ; Methane/metabolism ; Microbiota ; Fermentation ; Biofuels ; RNA, Ribosomal, 16S/genetics ; }, abstract = {UNLABELLED: Industrial anaerobic digestion (AD) represents a relevant energy source beyond today's fossil fuels, wherein organic matter is recycled to methane gas via an intricate and complex microbial food web. Despite its potential, anaerobic reactors often undergo process instability over time, which is frequently caused by substrate composition perturbations, making the system unreliable for stable energy production. To ensure the reliability of AD technologies, it is crucial to identify microbial and system responses to better understand the effect of such perturbations and ultimately detect signatures indicative of process failure. Here, we investigate the effect of the microalgal organic loading rate (OLR) on the fermentation product profile, microbiome dynamics, and disruption/recovery of major microbial metabolisms. Reactors subjected to low- and high-OLR disturbances were operated and monitored for fermentation products and biogas production over time, while microbial responses were investigated via 16S rRNA gene amplicon data, shotgun metagenomics, and metagenome-centric metaproteomics. Both low- and high-ORL fed systems encountered a sudden decline in methane production during OLR disturbances, followed by a recovery of the methanogenic activity within the microbiome. In the high-OLR disturbances, system failure triggered an upregulation of hydrolytic enzymes, an accumulation of fermentation products, and a shift in the methanogenic population from hydrogenotrophic to acetoclastic methanogens, with the latter being essential for recovery of the system after collapse.<br><br>IMPORTANCE: Anaerobic digestion (AD) with microalgae holds great potential for sustainable energy production, but process instability caused by substrate disturbances remains a significant barrier. This study highlights the importance of understanding the microbial dynamics and system responses during organic loading rate perturbations. By identifying key shifts in microbial populations and enzyme activity, particularly the transition from hydrogenotrophic to acetoclastic methanogens during recovery, this research provides critical insights for improving AD system stability and can contribute to optimizing microalgae-based AD processes for more reliable and efficient methane production.}, }
@article {pmid40011766, year = {2025}, author = {Proctor, DM and Sansom, SE and Deming, C and Conlan, S and Blaustein, RA and Atkins, TK and ,  and Dangana, T and Fukuda, C and Thotapalli, L and Kong, HH and Lin, MY and Hayden, MK and Segre, JA}, title = {Clonal Candida auris and ESKAPE pathogens on the skin of residents of nursing homes.}, journal = {Nature}, volume = {639}, number = {8056}, pages = {1016-1023}, pmid = {40011766}, issn = {1476-4687}, mesh = {*Nursing Homes/statistics &amp; numerical data ; Humans ; *Skin/microbiology ; *Candida auris/genetics/isolation &amp; purification/drug effects/classification ; Metagenomics ; beta-Lactamases/genetics ; Male ; Female ; Aged ; Microbiota/genetics ; Aged, 80 and over ; Bacteria/isolation &amp; purification/genetics/drug effects ; Bacterial Proteins ; }, abstract = {Antimicrobial resistance is a public health threat associated with increased morbidity, mortality and financial burden in nursing homes and other healthcare settings[1]. Residents of nursing homes are at increased risk of pathogen colonization and infection owing to antimicrobial-resistant bacteria and fungi. Nursing homes act as reservoirs, amplifiers and disseminators of antimicrobial resistance in healthcare networks and across geographical regions[2]. Here we investigate the genomic epidemiology of the emerging, multidrug-resistant human fungal pathogen Candida auris in a ventilator-capable nursing home. Coupling strain-resolved metagenomics with isolate sequencing, we report skin colonization and clonal spread of C. auris on the skin of nursing home residents and throughout a metropolitan region. We also report that most Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Entobacter species (ESKAPE) pathogens and other high-priority pathogens (including Escherichia coli, Providencia stuartii, Proteus mirabilis and Morganella morganii) are shared in a nursing home. Integrating microbiome and clinical microbiology data, we detect carbapenemase genes at multiple skin sites on residents identified as carriers of these genes. We analyse publicly available shotgun metagenomic samples (stool and skin) collected from residents with varying medical conditions living in seven other nursing homes and provide additional evidence of previously unappreciated bacterial strain sharing. Taken together, our data suggest that skin is a reservoir for colonization by C. auris and ESKAPE pathogens and their associated antimicrobial-resistance genes.}, }
@article {pmid40008244, year = {2025}, author = {Xu, LL and McIlroy, SE and Ni, Y and Guibert, I and Chen, J and Rocha, U and Baker, DM and Panagiotou, G}, title = {Chemical pollution drives taxonomic and functional shifts in marine sediment microbiome, influencing benthic metazoans.}, journal = {ISME communications}, volume = {5}, number = {1}, pages = {ycae141}, pmid = {40008244}, issn = {2730-6151}, abstract = {Microbial communities in marine sediments contribute significantly to the overall health and resiliency of marine ecosystems. However, increased human disturbance undermines biodiversity and, hence, natural functionality provided by marine sediments. Here, through a deep shotgun metagenomics sequencing of the sediment microbiome and COI metabarcoding of benthic metazoans, we demonstrate that >50% of the microorganisms' and metazoan's taxonomic variation can be explained by specific chemical pollution indices. Interestingly, there was a significant correlation between the similarity in microbiome communities' taxonomical and functional attributes and the similarity of benthic metazoans community composition. Furthermore, mediation analysis was conducted to evaluate the microbiome-mediated indirect effect, suggesting that microbial species and functions accounted for 36% and 26%, respectively, of the total effect of pollution on the benthic metazoans. Our study introduces a multi-level perspective for future studies in urbanized coastal areas to explore marine ecosystems, revealing the impact of pollution stress on microbiome communities and their critical biogeochemical functions, which in turn may influence macrofaunal composition.}, }
@article {pmid40007605, year = {2025}, author = {Buffet-Bataillon, S and Durão, G and Le Huërou-Luron, I and Rué, O and Le Cunff, Y and Cattoir, V and Bouguen, G}, title = {Gut microbiota dysfunction in Crohn's disease.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1540352}, pmid = {40007605}, issn = {2235-2988}, mesh = {Humans ; *Crohn Disease/microbiology/pathology ; *Gastrointestinal Microbiome ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Metagenomics ; Male ; *Bacteria/classification/genetics/isolation &amp; purification ; Female ; Adult ; Middle Aged ; Dysbiosis ; Virulence Factors ; }, abstract = {INTRODUCTION: Crohn's disease (CD) results from alterations in the gut microbiota and the immune system. However, the exact metabolic dysfunctions of the gut microbiota during CD are still unclear. Here, we investigated metagenomic functions using PICRUSt2 during the course of CD to better understand microbiota-related disease mechanisms and provide new insights for novel therapeutic strategies.<br><br>METHODS: We performed 16S rRNA-based microbial profiling of 567 faecal samples collected from a cohort of 383 CD patients, including 291 remissions (CR), 177 mild-moderate (CM) and 99 severe (CS) disease states. Gene and pathway composition was assessed using PICRUSt2 analyses of 16S data.<br><br>RESULTS: As expected, changes in alpha and beta diversity, in interaction networks and increases in Proteobacteria abundance were associated with disease severity. However, microbial function was more consistently disrupted than composition from CR, to CM and then to CS. Major shifts in oxidative stress pathways and reduced carbohydrate and amino acid metabolism in favour of nutrient transport were identified in CS compared to CR. Virulence factors involved in host invasion, host evasion and inflammation were also increased in CS.<br><br>CONCLUSIONS: This functional metagenomic information provides new insights into community-wide microbial processes and pathways associated with CD pathogenesis. This study paves the way for new advanced strategies to rebalance gut microbiota and/or eliminate oxidative stress, and biofilm to downregulate gut inflammation.}, }
@article {pmid40006931, year = {2025}, author = {Sarker, S and Talukder, S and Athukorala, A and Whiteley, PL}, title = {The Spleen Virome of Australia's Endemic Platypus Is Dominated by Highly Diverse Papillomaviruses.}, journal = {Viruses}, volume = {17}, number = {2}, pages = {}, pmid = {40006931}, issn = {1999-4915}, mesh = {Animals ; Phylogeny ; *Virome ; Genome, Viral ; Australia ; *Platypus/virology ; *Papillomaviridae/genetics/classification/isolation &amp; purification ; *Spleen/virology ; Genetic Variation ; High-Throughput Nucleotide Sequencing ; Evolution, Molecular ; }, abstract = {The platypus (Ornithorhynchus anatinus), a unique monotreme, represents a pivotal point in mammalian evolution with its distinctive traits, such as electroreception and venom production. Despite its evolutionary significance, the viral diversity within platypuses remains poorly understood. This study employed next-generation sequencing to investigate the virome of the dead platypuses, uncovering a range of novel and divergent viruses. Among the identified viruses were four complete genomes of papillomaviruses (OaPV1-4) exhibiting substantial divergence from known strains, suggesting a novel genus within the subfamily Secondpapillomavirinae. Additionally, five novel parvoviruses were detected, including two with complete genomes, highlighting the complex viral ecosystem of the platypus. Phylogenetic analysis placed these viruses in unique evolutionary branches, further demonstrating the platypus's evolutionary significance. A circular DNA virus, a tombus-like virus, and a nodamuvirus were also identified, expanding the understanding of viral diversity in monotremes. These findings offer crucial insights into viral evolution in one of the most unique mammalian lineages, emphasising the need for further exploration to assess ecological and pathological impacts on platypus populations.}, }
@article {pmid40005640, year = {2025}, author = {Cao, X and Cui, Q and Li, D and Liu, Y and Liu, K and Li, Z}, title = {Characteristics of Soil Microbial Community Structure in Different Land Use Types of the Huanghe Alluvial Plain.}, journal = {Microorganisms}, volume = {13}, number = {2}, pages = {}, pmid = {40005640}, issn = {2076-2607}, support = {2022YSKY-57//Integrated analysis of soil hydrologic function of returning farmland to forest (grass) in Basic Scientific Research Youth Exploration Project of Central public welfare research Institute of Chinese Research Academy of Environmental Sciences, China/ ; }, abstract = {The Huanghe alluvial plain plays a crucial role in biodiversity conservation. However, its ecosystem has become sensitive and fragile due to long-term human disturbances. Enhancing the resilience of this ecosystem and promoting the sustainable use of land resources are key to addressing its ecological challenges. Soil microbial communities are vital to ecosystem functioning, and land use is a major human factor influencing their structure and diversity. Existing research on the Huanghe alluvial plain primarily focuses on soil physicochemical properties and moisture content, with relatively limited attention given to soil microorganisms. Therefore, this study, using the Wudi Tanyang Forest Farm in the Huanghe alluvial plain as a case study, employs high-throughput metagenomic sequencing to analyze the composition and diversity of soil bacteria, eukaryota, archaea, and virus communities in five different land use types (Tamarix chinensis forest, Fraxinus chinensis forest, farmland, wetland, and grassland). The results indicate that: (1) At the phylum level, the top three bacteria communities were Pseudomonadota, Acidobacteriota, and Actinomycetota; the top three in the eukaryota communities were Ascomycota, Mucoromycota, and Basidiomycotina; the top three in the archaea communities were Nitrososphaerota, Euryarchaeota, and Candidatus Thermoplasmatota; and the virus communities were dominated by Uroviricota; (2) The microbial community structure of the Tamarix chinensis forest and the Fraxinus chinensis forest was similar, and was significantly different from the other three land use types; (3) The land use type had a significant effect on the diversity of the soil microbial communities, with a higher diversity in the wetland and grassland soils; (4) The dominant species of the soil microbial communities under different land use types showed significant differences. This study provides theoretical support for land use optimization and sustainable soil management in the Huanghe alluvial plain region.}, }
@article {pmid40005401, year = {2025}, author = {Straume, Z and Krūmiņa, N and Elbere, I and Rozenberga, M and Erts, R and Rudzīte, D and Proskurina, A and Krumina, A}, title = {Impact of Vitamins, Antibiotics, Probiotics, and History of COVID-19 on the Gut Microbiome in Ulcerative Colitis Patients: A Cross-Sectional Study.}, journal = {Medicina (Kaunas, Lithuania)}, volume = {61}, number = {2}, pages = {}, pmid = {40005401}, issn = {1648-9144}, support = {1.1.1.1/21/A/029//the European Regional Development Fund (ERDF)/ ; }, mesh = {Humans ; *Colitis, Ulcerative/microbiology/drug therapy ; Female ; Cross-Sectional Studies ; Male ; *Gastrointestinal Microbiome/drug effects ; *COVID-19/complications/epidemiology ; *Vitamins/therapeutic use ; *Anti-Bacterial Agents/therapeutic use ; Adult ; Middle Aged ; *Probiotics/therapeutic use ; SARS-CoV-2 ; }, abstract = {Background and Objectives: The human gut microbiome is essential for the health of the host and is affected by antibiotics and coronavirus disease 2019 (COVID-19). The gut microbiome is recognized as a contributing factor in the development of ulcerative colitis. Specific vitamins and probiotics have been demonstrated to positively influence the microbiome by enhancing the prevalence of expected beneficial microorganisms. Materials and Methods: Forty-nine ulcerative colitis (UC) outpatients from Riga East Clinical University Hospital were enrolled in this cross-sectional study from June 2021 to December 2021. All patients were divided into groups based on history of COVID-19 (COVID-19 positive vs. COVID-19 negative) in the last six months. Information about antibiotic, probiotic, and vitamin intake were outlined, and faecal samples were collected. The MetaPhlAn v.2.6.0 tool was used for the taxonomic classification of the gut microbiome metagenome data. Statistical analysis was performed using R 4.2.1. Results: Of the 49 patients enrolled, 31 (63%) were male and 18 (37%) were female. Coronavirus disease 2019 was found in 14 (28.6%) patients in the last 6 months. Verrucomicrobia was statistically significantly lower in the COVID-19 positive group (M = 0.05; SD = 0.11) compared to the COVID-19 negative group (M = 0.5; SD = 1.22), p = 0.03. Antibiotic non-users had more Firmicutes in their microbiome than antibiotic users (p = 0.008). The most used vitamin supplement was vitamin D (N = 18), fifteen (42.9%) of the patients were COVID-19 negative and 3 (21.4%) were COVID-19 positive over the last six months (p > 0.05). Vitamin C users had more Firmicutes in their gut microbiome compared to non-users (Md = 72.8 [IQR: 66.6; 78.7] vs. Md = 60.1 [IQR: 42.4; 67.7]), p = 0.01. Conclusions: Antibiotic non-users had more Firmicutes than antibiotic users in their gut microbiome. Only vitamin C had statistically significant results; in users, more Firmicutes were observed. A mild course of COVID-19 may not influence ulcerative colitis patients' gut microbiome.}, }
@article {pmid40005052, year = {2025}, author = {Zang, P and Chen, P and Chen, J and Sun, J and Lan, H and Dong, H and Liu, W and Xu, N and Wang, W and Hou, L and Sun, B and Zhang, L and Huang, J and Wang, P and Ren, F and Liu, S}, title = {Alteration of Gastrointestinal Function and the Ameliorative Effects of Hericium erinaceus Polysaccharides in Tail Suspension Rats.}, journal = {Nutrients}, volume = {17}, number = {4}, pages = {}, pmid = {40005052}, issn = {2072-6643}, support = {242300421105//Henan Natural Science Foundation of Excellent Young Scholars/ ; }, mesh = {Animals ; Rats, Sprague-Dawley ; Gastrointestinal Microbiome/drug effects ; Rats ; Male ; *Hericium/chemistry ; *Hindlimb Suspension/adverse effects ; Weightlessness Simulation/adverse effects ; *Polysaccharides/pharmacology ; *Gastrointestinal Tract/drug effects ; Dietary Supplements ; *Gastrointestinal Diseases/prevention &amp; control/etiology ; Metagenomics ; Dysbiosis ; Metabolomics ; }, abstract = {Background/Objectives: Long-term spaceflight in a microgravity environment frequently results in gastrointestinal dysfunction, presenting substantial challenges to astronauts' health. Hericium erinaceus, a plant recognized for its dual use as food and medicine, contains a key functional component called Hericium erinaceus polysaccharide (HEP), which is purported to promote gastrointestinal health. This study aims to investigate the protective effects of HEP against gastrointestinal disturbances induced by simulated weightlessness and to elucidate its regulatory mechanisms. Methods: Sprague Dawley rats subjected to a tail suspension model were administered either a standard diet or a diet supplemented with 0.125% HEP over a period of 4 weeks (the intake of HEP is approximately 157.5 mg/kg bw/d, n = 8), metagenomics and targeted metabolomics to investigate the effects of HEP on gastrointestinal hormone secretion disorders, gut microbiota dysbiosis, and intestinal barrier damage induced by simulated weightlessness. Results: Dietary supplementation with HEP was observed to significantly alleviate weightlessness-induced gastrointestinal hormone disruptions, enhancing motility and intestinal barrier function while reducing inflammation. In addition, HEP improved gut microbiota by boosting beneficial bacteria as Oscillibacter sp.1-3, Firmicutes bacterium ASF500, and Lactobacillus reuteri, while reducing harmful bacteria like Escherichia coli and Mucispirillum schaedleri at the species level. Furthermore, HEP altered the serum metabolic profile of the rats, reducing inflammation by upregulating the tryptophan metabolism pathway and enhancing the production of short-chain fatty acids. Conclusions: HEP effectively protects against gastrointestinal dysfunction induced by simulated weightlessness by regulating hormone secretion and maintaining intestinal homeostasis.}, }
@article {pmid40004244, year = {2025}, author = {Blankestijn, JM and Baalbaki, N and Beijers, RJHCG and Cornelissen, MEB and Wiersinga, WJ and Abdel-Aziz, MI and Maitland-van der Zee, AH and , }, title = {Exploring Heterogeneity of Fecal Microbiome in Long COVID Patients at 3 to 6 Months After Infection.}, journal = {International journal of molecular sciences}, volume = {26}, number = {4}, pages = {}, pmid = {40004244}, issn = {1422-0067}, support = {LSHM20104; LSHM20068//Health Holland/ ; }, mesh = {Humans ; *COVID-19/microbiology ; *Feces/microbiology ; Male ; Female ; *Gastrointestinal Microbiome ; Middle Aged ; Aged ; SARS-CoV-2/isolation &amp; purification ; Adult ; }, abstract = {An estimated 10% of COVID-19 survivors have been reported to suffer from complaints after at least three months. The intestinal microbiome has been shown to impact long COVID through the gut-lung axis and impact the severity. We aimed to investigate the relationship between the gut microbiome and clinical characteristics, exploring microbiome heterogeneity through clustering. Seventy-nine patients with long COVID evaluated at 3 to 6 months after infection were sampled for fecal metagenome analysis. Patients were divided into two distinct hierarchical clusters, based solely on the microbiome composition. Compared to cluster 1 (n = 67), patients in cluster 2 (n = 12) showed a significantly reduced lung function (FEV1, FVC, and DLCO) and during acute COVID-19 showed a longer duration of hospital admissions (48 compared to 7 days) and higher rates of ICU admissions (92% compared to 22%). Additionally, the microbiome composition showed a reduced alpha diversity and lower proportion of butyrate-producing bacteria in cluster 2 together with higher abundances of Ruminococcus gnavus, Escherichia coli, Veillonella spp. and Streptococcus spp. and reduced abundances of Faecalibacterium prausnitzii and Eubacteria spp. Further research could explore the effect of pre- and pro-biotic supplementation and its impact on lung function and societal participation in long COVID.}, }
@article {pmid40004174, year = {2025}, author = {Cui, Y and Guan, H and Okyere, SK and Hua, Z and Deng, Y and Deng, H and Ren, Z and Deng, J}, title = {Microbial Guardians or Foes? Metagenomics Reveal Association of Gut Microbiota in Intestinal Toxicity Caused by DON in Mice.}, journal = {International journal of molecular sciences}, volume = {26}, number = {4}, pages = {}, pmid = {40004174}, issn = {1422-0067}, support = {. 32273072//This research was supported by National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/genetics ; Mice ; *Trichothecenes/toxicity ; *Metagenomics/methods ; Cytokines/metabolism/genetics ; Male ; Jejunum/pathology/drug effects/metabolism/microbiology ; Colon/pathology/drug effects/metabolism/microbiology ; Intestinal Mucosa/metabolism/pathology/drug effects ; Zonula Occludens-1 Protein/metabolism ; *Intestines/drug effects/pathology/microbiology ; }, abstract = {The role of gut microbiota has become a research hotspot in recent years; however, whether the gut microbiota are involved in the alleviation or exacerbation of Deoxynivalenol (DON) toxicity has not been fully studied. Therefore, the objective of this study was to investigate whether the gut microbiota are involved in reducing or aggravating the intestinal damage induced by DON in mice. Mice that received or did not receive antibiotic-induced intestinal flora clearance were orally given DON (5 mg kg/bw/day) for 14 days. At the end of the experiment, serum, intestinal tissue samples and colon contents were collected for further analysis. DON caused development of severe histopathological damage, such as necrosis and inflammation of the jejunum and colon in mice without gut microbiota clearance. The levels of tight junction proteins ZO-1 and occludin were reduced in the jejunum and colon of mice without gut microbiota clearance. In addition, the mRNA and protein levels of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) were increased in mice without gut microbiota clearance. The presence of microbiota exacerbate the intestinal damage induced by DON via changes in gut microbiota abundance and production of gut damaging metabolites.}, }
@article {pmid40003915, year = {2025}, author = {Chao, X and Fan, Z and Wu, J and Ye, C and Wang, X and Li, R and Chen, S and Zhang, X and Fang, C and Luo, Q}, title = {Application of mRNA-Seq and Metagenomic Sequencing to Study Salmonella pullorum Infections in Chickens.}, journal = {International journal of molecular sciences}, volume = {26}, number = {4}, pages = {}, pmid = {40003915}, issn = {1422-0067}, support = {2022B0202100002//Key-Area Research and Development Program of Guangdong Province/ ; 2024B03J1353//Science and Technology Program of Guangzhou City/ ; 2023ZD04064//STI2030-Major Projects/ ; }, mesh = {Animals ; *Chickens/microbiology/genetics ; *Poultry Diseases/microbiology/genetics ; *Salmonella Infections, Animal/microbiology/genetics ; *Metagenomics/methods ; *Salmonella/genetics ; Gastrointestinal Microbiome/genetics ; *RNA, Messenger/genetics ; RNA-Seq ; Cecum/microbiology ; Alternative Splicing ; Gene Expression Profiling ; }, abstract = {The disease caused by Salmonella pullorum has been demonstrated to exert a deleterious effect on the performance of poultry, giving rise to elevated mortality and considerable economic losses within the breeding industry. However, there is a paucity of research investigating the relationship between cecal gene expression and different isomer and Salmonella pullorum infection, and research on the relationship between intestinal microbiota and Salmonella pullorum infection is also limited. In this study, mRNA-Seq and metagenomic sequencing were performed on the cecal tissues and fresh feces of individuals who tested positive (n = 4) and negative (n = 4) for Salmonella pullorum, with the aim of exploring the chickens infected with Salmonella pullorum from two perspectives: the gene transcription level and the microbial level. The mRNA sequencing results revealed 1560 differentially expressed genes (DEGs), of which 380 genes were found to be up-regulated and 1180 genes were down-regulated. A number of genes were reported to be associated with immunity, including AQP8, SLC26A3, CBS, IFI6, DDX60, IL8L1 and IL8L2. Furthermore, a total of 1047 differentially expressed alternative splicings (DEASs) were identified through alternative splicing analysis, including CBS, SLC6A9, ILDR2, OCRL, etc. The joint analysis of DEGs and DEASs revealed 70 genes that exhibited both differentially expressed alternative splicings and differential expression, including CTNND1, TPM1, SPPL2A, etc. The results of metagenomic sequencing demonstrated that the abundances of Bacteroides, Firmicutes, and Verrucobacteria underwent a significant alteration subsequent to the infection of Salmonella pullorum. In summary, the present study conducted a preliminary exploration of the genetic basis of chickens infected with Salmonella pullorum. TPM1 and SPPL2A were found to be differentially expressed by mRNA-Seq, and differences in alternative splicing events. Furthermore, metagenomic sequencing revealed significant changes in the microbial communities of Bacteroidetes, Firmicutes, and Verrucobacteria during infection with Salmonella pullorum.}, }
@article {pmid40003912, year = {2025}, author = {Chatzokou, D and Tsarna, E and Davouti, E and Siristatidis, CS and Christopoulou, S and Spanakis, N and Tsakris, A and Christopoulos, P}, title = {Semen Microbiome, Male Infertility, and Reproductive Health.}, journal = {International journal of molecular sciences}, volume = {26}, number = {4}, pages = {}, pmid = {40003912}, issn = {1422-0067}, mesh = {Male ; Humans ; *Infertility, Male/microbiology ; *Semen/microbiology ; *Reproductive Health ; *Microbiota ; Spermatozoa/microbiology ; Female ; Pregnancy ; Semen Analysis ; }, abstract = {The semen microbiome, once believed to be sterile, is now recognized as a dynamic ecosystem containing a diverse range of microorganisms with potential implications for male fertility and reproductive health. We aimed to examine the relationship between the semen microbiome, male infertility, and reproductive outcomes, highlighting the transformative role of next generation sequencing techniques and bioinformatics in exploring this intricate interaction, and we present a critical review of the published literature on this issue. Current evidence suggests a complex association between the composition of the semen microbiome and male fertility, with certain bacterial genera, such as Lactobacillus and Prevotella that exert opposing effects on sperm quality and DNA integrity. In addition, the influence of the semen microbiome extends beyond natural fertility, affecting assisted reproductive technologies and pregnancy outcomes. Despite considerable progress, challenges remain in standardizing methodologies and interpreting findings. In conclusion, we identify the lack of a definitive management proposal for couples presenting with this phenomenon, and we underline the need for an algorithm and indicate the questions raised that point toward our goal for a strategy. Continued research is essential to clarify the role of the semen microbiome in male reproductive health and to advance the development of personalized fertility management approaches.}, }
@article {pmid40000989, year = {2025}, author = {Zhao, M and Zhang, Y and Liu, S and Wang, F and Zhang, P}, title = {Eradication of Helicobacter pylori reshapes gut microbiota and facilitates the evolution of antimicrobial resistance through gene transfer and genomic mutations in the gut.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {90}, pmid = {40000989}, issn = {1471-2180}, support = {32201393//National Natural Science Foundation of China/ ; }, mesh = {*Helicobacter pylori/drug effects/genetics ; Humans ; *Gastrointestinal Microbiome/genetics/drug effects ; *Helicobacter Infections/microbiology/drug therapy ; *Gene Transfer, Horizontal ; *Drug Resistance, Bacterial/genetics ; *Anti-Bacterial Agents/pharmacology/therapeutic use ; Feces/microbiology ; Mutation ; Metagenomics ; Female ; Evolution, Molecular ; Male ; Bacteria/genetics/classification/drug effects ; Middle Aged ; Genome, Bacterial ; Adult ; Klebsiella/genetics/drug effects ; }, abstract = {Treating Helicobacter pylori (H. pylori) infection requires large quantities of antibiotics, thus dramatically promoting the enrichment and dissemination of antimicrobial resistance (AMR) in feces. However, the influence of H. pylori eradication on the AMR mobility and the gut microbiota evolution has yet to be thoroughly investigated. Here, a study involving 12 H. pylori-positive participants was conducted, and the pre- and post- eradication fecal samples were sequenced. Metagenomic analysis revealed that the eradication treatment drastically altered the gut microbiome, with the Escherichia and Klebsiella genera emerging as the predominant bacteria. Interestingly, the eradication treatment significantly increased the relative abundance and diversity of resistome and mobilome in gut microbiota. Eradication of H. pylori also enriched AMR genes (ARGs) conferring resistance to antibiotics not administered because of the co-location with other ARGs or mobile genetic elements (MGEs). Additionally, the Escherichia and Klebsiella genera were identified as the primary bacterial hosts of these highly transferable ARGs. Furthermore, the genomic variations associated with ARGs in Escherichia coli (E. coli) caused by the eradication treatment were profiled, including the parC, parE, and gyrA genes. These findings revealed that H. pylori eradication promoted the enrichment of ARGs and MGEs in the Escherichia and Klebsiella genera, and further facilitated bacterial evolution through the horizontal transfer of ARGs and genomic variations.}, }
@article {pmid39999861, year = {2025}, author = {Mejia, G and Jara-Servin, A and Hernández-Álvarez, C and Romero-Chora, L and Peimbert, M and Cruz-Ortega, R and Alcaraz, LD}, title = {Rhizosphere microbiome influence on tomato growth under low-nutrient settings.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {3}, pages = {}, pmid = {39999861}, issn = {1574-6941}, support = {DGAPA-PAPIIT-UNAM IN206824//Universidad Nacional Aut&#xf3;noma de M&#xe9;xico/ ; }, mesh = {*Solanum lycopersicum/microbiology/growth &amp; development ; *Rhizosphere ; *Microbiota ; *Soil Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Plant Roots/microbiology/growth &amp; development ; *Nutrients/metabolism ; Biomass ; }, abstract = {Studies have suggested that reduced nutrient availability enhances microbial diversity around plant roots, positively impacting plant productivity. However, the specific contributions of rhizosphere microbiomes in nutrient-poor environments still need to be better understood. This study investigates tomato (Solanum lycopersicum L.) root microbiome under low-nutrient conditions. Plants were grown in hydroponics with soil-derived microbial community inoculations. We hypothesized that nutrient limitation would increase the selection of beneficial bacterial communities, compensating for nutrient deficiencies. We identified 12 294 operational taxonomic units across treatments and controls using 16S rRNA gene sequencing. Increased plant biomass was observed in treatments compared to controls, suggesting a role for the microbiome in mitigating nutrient limitations. The relative abundance of genera such as Luteolibacter and Sphingopyxis relative abundance correlated with plant phenotypic traits (P ≤ .05), and their presence was further validated using shotgun metagenomics. We annotated 722 677 protein families and calculated a core set of 48 116 protein families shared across all treatments and assigned them into bacteria (93.7%) and eukaryota (6.2%). Within the core bacterial metagenome, we identified protein families associated with pathways involved in positive plant interactions like the nitrogen fixation. Limited nutrient availability enhanced plant productivity under controlled conditions, offering a path to reduce fertilizer use in agriculture.}, }
@article {pmid39999339, year = {2025}, author = {Hohmann, M and Iliasov, D and Larralde, M and Johannes, W and Janßen, KP and Zeller, G and Mascher, T and Gulder, TAM}, title = {Heterologous Expression of a Cryptic BGC from Bilophila sp. Provides Access to a Novel Family of Antibacterial Thiazoles.}, journal = {ACS synthetic biology}, volume = {14}, number = {3}, pages = {967-978}, pmid = {39999339}, issn = {2161-5063}, mesh = {*Thiazoles/pharmacology/metabolism/chemistry ; *Anti-Bacterial Agents/pharmacology/metabolism/chemistry ; Humans ; Gastrointestinal Microbiome ; *Bacteroidetes/genetics/metabolism ; }, abstract = {Human health is greatly influenced by the gut microbiota and microbiota imbalance can lead to the development of diseases. It is widely acknowledged that the interaction of bacteria within competitive ecosystems is influenced by their specialized metabolites, which act, e.g., as antibacterials or siderophores. However, our understanding of the occurrence and impact of such natural products in the human gut microbiome remains very limited. As arylthiazole siderophores are an emerging family of growth-promoting molecules in pathogenic bacteria, we analyzed a metagenomic data set from the human microbiome and thereby identified the bil-BGC, which originates from an uncultured Bilophila strain. Through gene synthesis and BGC assembly, heterologous expression and mutasynthetic experiments, we discovered the arylthiazole natural products bilothiazoles A-F. While established activities of related molecules indicate their involvement in metal-binding and -uptake, which could promote the growth of pathogenic strains, we also found antibiotic activity for some bilothiazoles. This is supported by biosensor-experiments, where bilothiazoles C and E show PrecA-suppressing activity, while bilothiazole F induces PblaZ, a biosensor characteristic for β-lactam antibiotics. These findings serve as a starting point for investigating the role of bilothiazoles in the pathogenicity of Bilophila species in the gut.}, }
@article {pmid39998665, year = {2025}, author = {Szóstak, N and Budnik, M and Tomela, K and Handschuh, L and Samelak-Czajka, A and Pietrzak, B and Schmidt, M and Kaczmarek, M and Galus, &#x141; and Mackiewicz, J and Mackiewicz, A and Kozlowski, P and Philips, A}, title = {Exploring correlations between gut mycobiome and lymphocytes in melanoma patients undergoing anti-PD-1 therapy.}, journal = {Cancer immunology, immunotherapy : CII}, volume = {74}, number = {4}, pages = {110}, pmid = {39998665}, issn = {1432-0851}, support = {2017/25/B/NZ5/01949//Narodowe Centrum Nauki/ ; POIR.04.01.02-00-0025/17-00//Narodowe Centrum Bada&#x144; i Rozwoju/ ; }, mesh = {Humans ; *Melanoma/drug therapy/immunology/microbiology/pathology ; *Gastrointestinal Microbiome/immunology ; Male ; Female ; *Lymphocytes/immunology ; Middle Aged ; Aged ; *Immune Checkpoint Inhibitors/therapeutic use/pharmacology ; *Mycobiome/immunology ; *Programmed Cell Death 1 Receptor/antagonists &amp; inhibitors ; Adult ; Aged, 80 and over ; }, abstract = {Research has shown that the microbiome can influence how the immune system responds to melanoma cells, affecting the course of the disease and the outcome of the therapy. Here, we used the metagenomic approach and flow cytometry analyses of blood cells to discover correlations between gut fungi of metastatic melanoma patients enrolled in anti-PD-1 therapy and lymphocytes in their blood.We analyzed the patterns of associations before the first administration of anti-PD-1 therapy (BT, n = 61) and in the third month of the therapy (T3, n = 37), allowing us to track changes during treatment. To understand the possible impact of gut fungi on the efficacy of anti-PD-1 therapy, we analyzed the associations in clinical beneficiaries (CB, n = 37) and non-beneficiaries (NB, n = 24), as well as responders (R, n = 28) and non-responders (NR, n = 33).Patients with LDH < 338 units/L, overall survival (OS) > 12, CB, as well as R, had lower levels of Shannon diversity (p = 0.02, p = 0.05, p = 0.05, and p = 0.03, respectively). We found that the correlation pattern between intestinal fungi and lymphocytes was specific to the type of response, positive or negative. When comparing CB and NB groups, correlations with opposite directions were detected for C. albicans, suggesting a response-specific immune reaction. For CB, M. restricta exhibited a set of correlations with different types of lymphocytes, with prevalent positive correlations, suggesting a robust immune response in the CB group. This result extends our former research, where M. restricta and C. albicans were associated with an increased risk of melanoma progression and a poorer response to anti-PD-1 treatment.}, }
@article {pmid39998261, year = {2025}, author = {Woh, PY and Chen, Y and Kumpitsch, C and Mohammadzadeh, R and Schmidt, L and Moissl-Eichinger, C}, title = {Reevaluation of the gastrointestinal methanogenic archaeome in multiple sclerosis and its association with treatment.}, journal = {Microbiology spectrum}, volume = {13}, number = {4}, pages = {e0218324}, pmid = {39998261}, issn = {2165-0497}, support = {F83, P32697, COE7//Austrian Science Fund (FWF)/ ; }, mesh = {Humans ; *Multiple Sclerosis/microbiology/drug therapy ; Female ; Middle Aged ; *Gastrointestinal Microbiome ; Adult ; Male ; Aged ; *Archaea/classification/genetics/metabolism/isolation &amp; purification ; Methanobrevibacter/genetics/isolation &amp; purification/metabolism/classification ; Metagenomics ; Methane/metabolism ; }, abstract = {The role of the gut archaeal microbiome (archaeome) in health and disease remains poorly understood. Methanogenic archaea have been linked to multiple sclerosis (MS), but prior studies were limited by small cohorts and inconsistent methodologies. To address this, we re-evaluated the association between methanogenic archaea and MS using metagenomic data from the International Multiple Sclerosis Microbiome Study. We analyzed gut microbiome profiles from 115 MS patients and 115 healthy household controls across Buenos Aires (27.8%), Edinburgh (33.9%), New York (10.4%), and San Francisco (27.8%). Metagenomic sequences were taxonomically classified using kraken2/bracken and a curated profiling database to detect archaea, specifically Methanobrevibacter species. Most MS patients were female (80/115), aged 25-72 years (median: 44.5), and 70% were undergoing treatment, including dimethyl fumarate (n = 21), fingolimod (n = 20), glatiramer acetate (n = 14), interferon (n = 18), natalizumab (n = 6), or ocrelizumab/rituximab (n = 1). We found no significant differences in overall archaeome profiles between MS patients and controls. However, treated MS patients exhibited higher abundances of Methanobrevibacter smithii and M. sp900766745 compared to untreated patients. Notably, M. sp900766745 abundance correlated with lower disease severity scores in treated patients. Our results suggest that gut methanogens are not directly associated with MS onset or progression but may reflect microbiome health during treatment. These findings highlight potential roles for M. smithii and M. sp900766745 in modulating treatment outcomes, warranting further investigation into their relevance to gut microbiome function and MS management.IMPORTANCEMultiple sclerosis (MS) is a chronic neuroinflammatory disease affecting the central nervous system, with approximately 2.8 million people diagnosed worldwide, mainly young adults aged 20-30 years. While recent studies have focused on bacterial changes in the MS microbiome, the role of gut archaea has been less explored. Previous research suggested a potential link between methanogenic archaea and MS disease status, but these findings remained inconclusive. Our study addresses this gap by investigating the gut archaeal composition in MS patients and examining how it changes in response to treatment. By focusing on methanogens, we aim to uncover novel insights into their role in MS, potentially revealing new biomarkers or therapeutic targets. This research is crucial for enhancing our understanding of the gut microbiome's impact on MS and improving patient management.}, }
@article {pmid39998243, year = {2025}, author = {Brochu, HN and Zhang, Q and Song, K and Wang, L and Deare, EA and Williams, JD and Icenhour, CR and Iyer, LK}, title = {Characterization of vaginal microbiomes in clinician-collected bacterial vaginosis diagnosed samples.}, journal = {Microbiology spectrum}, volume = {13}, number = {4}, pages = {e0258224}, pmid = {39998243}, issn = {2165-0497}, mesh = {Female ; *Vaginosis, Bacterial/microbiology/diagnosis ; Humans ; *Vagina/microbiology ; *Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; DNA, Bacterial/genetics ; Adult ; Actinobacteria ; }, abstract = {Bacterial vaginosis (BV) is a type of vaginal inflammation caused by bacterial overgrowth, upsetting the healthy microbiome of the vagina. Existing clinical testing for BV is primarily based upon physical and microscopic examination of vaginal secretions. Modern PCR-based clinical tests target panels of BV-associated microbes, such as the Labcorp NuSwab test that targets Atopobium (Fannyhessea) vaginae, Megasphaera-1, and Bacterial Vaginosis Associated Bacterium (BVAB)-2. Remnant clinician-collected NuSwab vaginal swabs underwent DNA extraction and 16S V3-V4 rRNA gene sequencing to profile microbes in addition to those included in the Labcorp NuSwab test. Community state types (CSTs) were determined using the most abundant taxon detected in each sample. PCR results for NuSwab panel microbial targets were compared against the corresponding microbiome profiles. Metabolic pathway abundances were characterized via metagenomic prediction from amplicon sequence variants (ASVs). 16S V3-V4 rRNA gene sequencing of 75 remnant vaginal swabs yielded 492 unique 16S V3-V4 ASVs, identifying 83 unique genera. NuSwab microbe quantification was strongly concordant with quantification by sequencing (P < 0.01). Samples in CST-I (18 of 18, 100%), CST-II (three of three, 100%), CST-III (15 of 17, 88%), and CST-V (one of one, 100%) were largely categorized as BV-negative via the NuSwab panel, while most CST-IV samples (28 of 36, 78%) were BV-positive or BV-indeterminate. BV-associated microbial and predicted metabolic signatures were shared across multiple CSTs. These findings highlight robust sequencing-based quantification of Labcorp NuSwab BV microbes, accurate discrimination of vaginal microbiome CSTs dominated by distinct Lactobacilli, and expanded the identification of BV-associated bacterial and metabolic biomarkers.IMPORTANCEBacterial vaginosis (BV) poses a significant health burden for women during reproductive years and onward. Current BV diagnostics rely on either panels of select microbes or on physical and microscopic evaluations by technicians. Here, we sequenced the microbiome profiles of samples previously diagnosed by the Labcorp NuSwab test to better understand disruptions to the vaginal microbiome during BV. We show that microbial sequencing can faithfully reproduce targeted PCR diagnostic results and can improve our knowledge of healthy and BV-associated microbial and metabolic biomarkers. This work highlights a robust, agnostic BV classification scheme with potential for future development of sequencing-based BV diagnostic tools.}, }
@article {pmid39998226, year = {2025}, author = {Martino, C and Kellman, BP and Sandoval, DR and Clausen, TM and Cooper, R and Benjdia, A and Soualmia, F and Clark, AE and Garretson, AF and Marotz, CA and Song, SJ and Wandro, S and Zaramela, LS and Salido, RA and Zhu, Q and Armingol, E and Vázquez-Baeza, Y and McDonald, D and Sorrentino, JT and Taylor, B and Belda-Ferre, P and Das, P and Ali, F and Liang, C and Zhang, Y and Schifanella, L and Covizzi, A and Lai, A and Riva, A and Basting, C and Broedlow, CA and Havulinna, AS and Jousilahti, P and Estaki, M and Kosciolek, T and Kuplicki, R and Victor, TA and Paulus, MP and Savage, KE and Benbow, JL and Spielfogel, ES and Anderson, CAM and Martinez, ME and Lacey, JV and Huang, S and Haiminen, N and Parida, L and Kim, H-C and Gilbert, JA and Sweeney, DA and Allard, SM and Swafford, AD and Cheng, S and Inouye, M and Niiranen, T and Jain, M and Salomaa, V and Zengler, K and Klatt, NR and Hasty, J and Berteau, O and Carlin, AF and Esko, JD and Lewis, NE and Knight, R}, title = {SARS-CoV-2 infectivity can be modulated through bacterial grooming of the glycocalyx.}, journal = {mBio}, volume = {16}, number = {4}, pages = {e0401524}, pmid = {39998226}, issn = {2150-7511}, support = {R01 GM069811/GM/NIGMS NIH HHS/United States ; NNF20SA0066621//Novo Nordisk Foundation/ ; R01 ES027595/ES/NIEHS NIH HHS/United States ; 1P30DK120515//HHS | National Institutes of Health (NIH)/ ; U19 AI116497/AI/NIAID NIH HHS/United States ; R00RG2503//UC | University of California, San Diego (UCSD)/ ; 2031989//National Science Foundation (NSF)/ ; ANR-17-CE11-0014//French National Research Agency/ ; 335525//Academy of Finland/ ; 3022//Emerald Foundation/ ; 1DP1AT010885//HHS | National Institutes of Health (NIH)/ ; U01 CA199277/CA/NCI NIH HHS/United States ; R01-CA077398//HHS | National Institutes of Health (NIH)/ ; R01ES027595//HHS | National Institutes of Health (NIH)/ ; UM1 CA164917/CA/NCI NIH HHS/United States ; R01GM069811//HHS | National Institutes of Health (NIH)/ ; RG/18/13/33946//British Heart Foundation (BHF)/ ; 2018-72190270//ANID Becas Chile Doctorado/ ; //Emil Aaltosen S&#xe4;&#xe4;ti&#xf6; (Emil Aaltonen Foundation)/ ; UH2AI153029//HHS | National Institutes of Health (NIH)/ ; //Health Data Research UK (HDR UK)/ ; AI Horizons Network//IBM | IBM Research/ ; P30-CA023100//HHS | National Institutes of Health (NIH)/ ; P30-CA033572//HHS | National Institutes of Health (NIH)/ ; DP1 AT010885/AT/NCCIH NIH HHS/United States ; //NIHR | NIHR Cambridge Biomedical Research Centre (NIHR Cambridge BRC)/ ; //Syd&#xe4;ntutkimuss&#xe4;&#xe4;ti&#xf6; (Finnish Foundation for Cardiovascular Research)/ ; UH2 AI153029/AI/NIAID NIH HHS/United States ; P30 DK120515/DK/NIDDK NIH HHS/United States ; 101046041//Union's Horizon Europe Research and Innovation 459 Actions/ ; //Munz Chair of Cardiovascular Prediction and Prevention/ ; 321351 and 354447//Academy of Finland/ ; R35GM119850//HHS | National Institutes of Health (NIH)/ ; UM1-CA164917//HHS | National Institutes of Health (NIH)/ ; P30 CA023100/CA/NCI NIH HHS/United States ; R01 CA077398/CA/NCI NIH HHS/United States ; BRC-1215-20014//NIHR | NIHR Cambridge Biomedical Research Centre (NIHR Cambridge BRC)/ ; R35 GM119850/GM/NIGMS NIH HHS/United States ; RG/13/13/30194//British Heart Foundation (BHF)/ ; P30 CA033572/CA/NCI NIH HHS/United States ; /WT_/Wellcome Trust/United Kingdom ; 2038509//National Science Foundation (NSF)/ ; N/A//UC San Diego Center for Microbiome Innovation/ ; P01 HL131474/HL/NHLBI NIH HHS/United States ; U01-CA199277//HHS | National Institutes of Health (NIH)/ ; 321356//Academy of Finland/ ; //Alfred Benzon Foundation (The Alfred Benzon Foundation)/ ; ANR-20-CE44-0005//French National Research Agency/ ; }, mesh = {Humans ; *COVID-19/virology/microbiology/metabolism ; *Glycocalyx/metabolism/virology ; *SARS-CoV-2/pathogenicity/physiology ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Heparan Sulfate Proteoglycans/metabolism ; Middle Aged ; Gastrointestinal Tract/microbiology ; Adult ; *Bacteria/metabolism ; Spike Glycoprotein, Coronavirus/metabolism ; }, abstract = {The gastrointestinal (GI) tract is a site of replication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and GI symptoms are often reported by patients. SARS-CoV-2 cell entry depends upon heparan sulfate (HS) proteoglycans, which commensal bacteria that bathe the human mucosa are known to modify. To explore human gut HS-modifying bacterial abundances and how their presence may impact SARS-CoV-2 infection, we developed a task-based analysis of proteoglycan degradation on large-scale shotgun metagenomic data. We observed that gut bacteria with high predicted catabolic capacity for HS differ by age and sex, factors associated with coronavirus disease 2019 (COVID-19) severity, and directly by disease severity during/after infection, but do not vary between subjects with COVID-19 comorbidities or by diet. Gut commensal bacterial HS-modifying enzymes reduce spike protein binding and infection of authentic SARS-CoV-2, suggesting that bacterial grooming of the GI mucosa may impact viral susceptibility.IMPORTANCESevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for coronavirus disease 2019, can infect the gastrointestinal (GI) tract, and individuals who exhibit GI symptoms often have more severe disease. The GI tract's glycocalyx, a component of the mucosa covering the large intestine, plays a key role in viral entry by binding SARS-CoV-2's spike protein via heparan sulfate (HS). Here, using metabolic task analysis of multiple large microbiome sequencing data sets of the human gut microbiome, we identify a key commensal human intestinal bacteria capable of grooming glycocalyx HS and modulating SARS-CoV-2 infectivity in vitro. Moreover, we engineered the common probiotic Escherichia coli Nissle 1917 (EcN) to effectively block SARS-CoV-2 binding and infection of human cell cultures. Understanding these microbial interactions could lead to better risk assessments and novel therapies targeting viral entry mechanisms.}, }
@article {pmid39997957, year = {2025}, author = {Muhie, S and Gautam, A and Mylroie, J and Sowe, B and Campbell, R and Perkins, EJ and Hammamieh, R and Garcia-Reyero, N}, title = {Effects of Environmental Chemical Pollutants on Microbiome Diversity: Insights from Shotgun Metagenomics.}, journal = {Toxics}, volume = {13}, number = {2}, pages = {}, pmid = {39997957}, issn = {2305-6304}, abstract = {Chemical exposure in the environment can adversely affect the biodiversity of living organisms, particularly when persistent chemicals accumulate over time and disrupt the balance of microbial populations. In this study, we examined how chemical contaminants influence microorganisms in sediment and overlaying water samples collected from the Kinnickinnic, Milwaukee, and Menomonee Rivers near Milwaukee, Wisconsin, USA. We characterized these samples using shotgun metagenomic sequencing to assess microbiome diversity and employed chemical analyses to quantify more than 200 compounds spanning 16 broad classes, including pesticides, industrial products, personal care products, and pharmaceuticals. Integrative and differential comparative analyses of the combined datasets revealed that microbial density, approximated by adjusted total sequence reads, declined with increasing total chemical concentrations. Protozoan, metazoan, and fungal populations were negatively correlated with higher chemical concentrations, whereas certain bacterial (particularly Proteobacteria) and archaeal populations showed positive correlations. As expected, sediment samples exhibited higher concentrations and a wider dynamic range of chemicals compared to water samples. Varying levels of chemical contamination appeared to shape the distribution of microbial taxa, with some bacterial, metazoan, and protozoan populations present only at certain sites or in specific sample types (sediment versus water). These findings suggest that microbial diversity may be linked to both the type and concentration of chemicals present. Additionally, this study demonstrates the potential roles of multiple microbial kingdoms in degrading environmental pollutants, emphasizing the metabolic versatility of bacteria and archaea in processing complex contaminants such as polyaromatic hydrocarbons and bisphenols. Through functional and resistance gene profiling, we observed that multi-kingdom microbial consortia-including bacteria, fungi, and protozoa-can contribute to bioremediation strategies and help restore ecological balance in contaminated ecosystems. This approach may also serve as a valuable proxy for assessing the types and levels of chemical pollutants, as well as their effects on biodiversity.}, }
@article {pmid39997213, year = {2025}, author = {Calado, R and Leal, MC and Silva, RXG and Borba, M and Ferro, A and Almeida, M and Madeira, D and Vieira, H}, title = {Living Coral Displays, Research Laboratories, and Biobanks as Important Reservoirs of Chemodiversity with Potential for Biodiscovery.}, journal = {Marine drugs}, volume = {23}, number = {2}, pages = {}, pmid = {39997213}, issn = {1660-3397}, support = {UIDB/50017/2020 + UIDP/50017/2020 + LA/P/0094/2020//Funda&#xe7;&#xe3;o para a Ci&#xea;ncia e Tecnologia/ ; (Project N&#xba;. C644915664-00000026)//"BLUE BIOECONOMY PACT", co-funded by the Next Gen-eration EU European Fund, under the incentive line "Agendas for Business Innovation" within Component 5-Capitalization and Business Innovation of the Portuguese Recovery and Resili-ence Plan (RRP), specifi/ ; }, mesh = {Animals ; *Anthozoa/metabolism ; *Biological Specimen Banks ; Coral Reefs ; *Bioprospecting/methods ; *Biological Products ; }, abstract = {Over the last decades, bioprospecting of tropical corals has revealed numerous bioactive compounds with potential for biotechnological applications. However, this search involves sampling in natural reefs, and this is currently hampered by multiple ethical and technological constraints. Living coral displays, research laboratories, and biobanks currently offer an opportunity to continue to unravel coral chemodiversity, acting as "Noah's Arks" that may continue to support the bioprospecting of molecules of interest. This issue is even more relevant if one considers that tropical coral reefs currently face unprecedent threats and irreversible losses that may impair the biodiscovery of molecules with potential for new products, processes, and services. Living coral displays provide controlled environments for studying corals and producing both known and new metabolites under varied conditions, and they are not prone to common bottlenecks associated with bioprospecting in natural coral reefs, such as loss of the source and replicability. Research laboratories may focus on a particular coral species or bioactive compound using corals that were cultured ex situ, although they may differ from wild conspecifics in metabolite production both in quantitative and qualitative terms. Biobanks collect and preserve coral specimens, tissues, cells, and/or information (e.g., genes, associated microorganisms), which offers a plethora of data to support the study of bioactive compounds' mode of action without having to cope with issues related to access, standardization, and regulatory compliance. Bioprospecting in these settings faces several challenges and opportunities. On one hand, it is difficult to ensure the complexity of highly biodiverse ecosystems that shape the production and chemodiversity of corals. On the other hand, it is possible to maximize biomass production and fine tune the synthesis of metabolites of interest under highly controlled environments. Collaborative efforts are needed to overcome barriers and foster opportunities to fully harness the chemodiversity of tropical corals before in-depth knowledge of this pool of metabolites is irreversibly lost due to tropical coral reefs' degradation.}, }
@article {pmid39995022, year = {2025}, author = {Thangavel, M and Sneha, MJX and Mani, I and Surendrababu, A and Rajapriya, P and Arulselvan, P and Alarfaj, AA and Thangavelu, I and Pandi, M}, title = {Diversity of Endophytic Fungi in Plant Species: Traditional vs. High-Throughput Sequencing Approaches.}, journal = {Chemistry &amp; biodiversity}, volume = {22}, number = {6}, pages = {e202402792}, doi = {10.1002/cbdv.202402792}, pmid = {39995022}, issn = {1612-1880}, mesh = {*High-Throughput Nucleotide Sequencing ; *Endophytes/genetics/isolation &amp; purification/classification ; *Fungi/genetics/isolation &amp; purification/classification ; Phylogeny ; Plant Leaves/microbiology ; Biodiversity ; }, abstract = {The plant microbiome significantly impacts plant life, with fungi playing a crucial role in shaping interactions and classifications. Advances in cultivation technologies have refined fungal classification, and research highlights the vital connection between endophytic fungi and their plant hosts. The present study employs morphological and phylogenetic techniques, predicting the Internal Transcribed Spacer 2 (ITS2) secondary structure and using next-generation sequencing (NGS) data to detect fungal endophytes in plant leaves via both traditional and conventional approaches. The research area, with its hot semi-arid environment and red and black soils, supports drought-resistant plants like Senna auriculata, Ziziphus mauritiana, and Catunaregam spinosa, known for their medicinal properties. These plants, rich in antioxidants, play a vital role in traditional medicine and highlight the region's rich ethno-botanical heritage. The culture-dependent study on the foliage yielded a total of 17 isolates from S. auriculata and 16 each from both C. spinosa and Z. mauritiana. The most common genera, Alternaria and Nigrospora, account for 18.3% of all isolated endophytic fungi. Three plants were colonized with Nigrospora and Lasiodiplodia, and their morphotypes were determined using ITS2 secondary structure prediction. Recent ecological studies highlight unculturable taxa, or dark taxa, where many species cannot sporulate or be cultured, emphasizing the need for High - Throughput Sequencing (HTS) approaches. The study gathered 68,791 reads from S. auriculata with 101 operational taxonomic units (OTUs), 58,620 from C. spinosa with 219 OTUs, and 66,087 from Z. mauritiana with 193 OTUs, with the majority of OTUs related to Colletotrichum (69%) and a minimum of Myrmaecium (2%). A total of 49 fungal isolates were obtained from traditional methods, whereas 513 fungal OTUs were retrieved through HTS methods, confirming the presence of a highly abundant fungus population in plant samples. The study reveals that using the ITS short amplicon sequencing technique provides distinct insights into endophytic fungal communities in three plant samples. In conclusion, analyzing plant fungal components using a combination of culture-dependent and culture-independent techniques may be a novel strategy.}, }
@article {pmid39993154, year = {2025}, author = {Yang, K and Zhang, L and Ruiz-Valencia, A and Song, X and Vogel, TM and Zhang, X}, title = {Heterogeneity in the Composition and Catabolism of Indigenous Microbiomes in Subsurface Soils Cocontaminated with BTEX and Chlorinated Aliphatic Hydrocarbons.}, journal = {Environmental science &amp; technology}, volume = {59}, number = {9}, pages = {4540-4550}, doi = {10.1021/acs.est.4c10071}, pmid = {39993154}, issn = {1520-5851}, mesh = {*Microbiota ; *Soil Microbiology ; Biodegradation, Environmental ; Soil Pollutants ; Benzene ; Toluene ; Soil/chemistry ; RNA, Ribosomal, 16S/genetics ; Benzene Derivatives ; Xylenes ; Hydrocarbons, Chlorinated ; }, abstract = {The effectiveness of in situ bioremediation can be affected by an insufficient understanding of high site/soil heterogeneity, especially in cocontaminated soils and sediments. In this study, samples from multiple locations within a relatively small area (20 × 20 m[2]) contaminated with benzene, toluene, ethylbenzene, and xylene (BTEX) and chlorinated aliphatic hydrocarbons (CAHs) were compared to examine their physicochemical and microbial properties. Unsupervised clustering analysis of 16S rRNA gene amplicon and metagenome shotgun sequencing data indicates that the indigenous community differentiated into three distinct patterns. In Cluster 1, Pseudomonas, with multiple monooxygenases and glutathione S-transferase (GST), was enriched in samples contaminated with high concentrations of BTEX and CAHs. Cluster 2 contained a high fraction of cometabolic degraders. Cluster 3 was dominated by Ralstonia and organohalide-respiring bacteria (OHRBs) mediating the reductive dechlorination of CAHs. Significant differences in composition and function among microbiomes were attributed to the differential distribution of organic pollutants, even in such a small area. Incorporating genomic features with physicochemical data can significantly enhance the understanding of the heterogeneities in soil and their impacts on microbial communities, thereby providing valuable information for the optimization of bioremediation strategies.}, }
@article {pmid39992132, year = {2025}, author = {Rodríguez-Ramos, J and Sadler, N and Zegeye, EK and Farris, Y and Purvine, S and Couvillion, S and Nelson, WC and Hofmockel, KS}, title = {Environmental matrix and moisture influence soil microbial phenotypes in a simplified porous media incubation.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0161624}, pmid = {39992132}, issn = {2379-5077}, support = {FWP 70880//Department of Energy, Office of Science, Genomic Sciences Program/ ; 60461//DOE | SC | PNNL | Environmental Molecular Sciences Laboratory (EMSL)/ ; 508623//Joint Genome Institute (JGI)/ ; }, mesh = {*Soil Microbiology ; Porosity ; *Soil/chemistry ; Phenotype ; Chitin/metabolism ; Microbiota ; Microbial Consortia ; Water ; Streptomyces/metabolism ; Metabolome ; Metagenome ; }, abstract = {Soil moisture and porosity regulate microbial metabolism by influencing factors, such as system chemistry, substrate availability, and soil connectivity. However, accurately representing the soil environment and establishing a tractable microbial community that limits confounding variables is difficult. Here, we use a reduced-complexity microbial consortium grown in a glass bead porous media amended with chitin to test the effects of moisture and a structural matrix on microbial phenotypes. Leveraging metagenomes, metatranscriptomes, metaproteomes, and metabolomes, we saw that our porous media system significantly altered microbial phenotypes compared with the liquid incubations, denoting the importance of incorporating pores and surfaces for understanding microbial phenotypes in soils. These phenotypic shifts were mainly driven by differences in expression of Streptomyces and Ensifer, which included a significant decrease in overall chitin degradation between porous media and liquid. Our findings suggest that the success of Ensifer in porous media is likely related to its ability to repurpose carbon via the glyoxylate shunt amidst a lack of chitin degradation byproducts while potentially using polyhydroxyalkanoate granules as a C source. We also identified traits expressed by Ensifer and others, including motility, stress resistance, and carbon conservation, that likely influence the metabolic profiles observed across treatments. Together, these results demonstrate that porous media incubations promote structure-induced microbial phenotypes and are likely a better proxy for soil conditions than liquid culture systems. Furthermore, they emphasize that microbial phenotypes encompass not only the multi-enzyme pathways involved in metabolism but also include the complex interactions with the environment and other community members.IMPORTANCESoil moisture and porosity are critical in shaping microbial metabolism. However, accurately representing the soil environment in tractable laboratory experiments remains a challenging frontier. Through our reduced complexity microbial consortium experiment in porous media, we reveal that predicting microbial metabolism from gene-based pathways alone often falls short of capturing the intricate phenotypes driven by cellular interactions. Our findings highlight that porosity and moisture significantly affect chitin decomposition, with environmental matrix (i.e., glass beads) shifting community metabolism towards stress tolerance, reduced resource acquisition, and increased carbon conservation, ultimately invoking unique microbial strategies not evident in liquid cultures. Moreover, we find evidence that changes in moisture relate to community shifts regarding motility, transporters, and biofilm formation, which likely influence chitin degradation. Ultimately, our incubations showcase how reduced complexity communities can be informative of microbial metabolism and present a useful alternative to liquid cultures for studying soil microbial phenotypes.}, }
@article {pmid39991687, year = {2025}, author = {Pan, Y and Jiao, FY}, title = {Helicobacter pylori infection and gastric microbiota: Insights into gastric and duodenal ulcer development.}, journal = {World journal of gastroenterology}, volume = {31}, number = {7}, pages = {100044}, pmid = {39991687}, issn = {2219-2840}, mesh = {Humans ; *Duodenal Ulcer/microbiology/pathology ; Gastric Mucosa/microbiology/pathology ; *Gastrointestinal Microbiome ; *Helicobacter Infections/microbiology/complications ; *Helicobacter pylori/pathogenicity/isolation &amp; purification ; *Stomach Ulcer/microbiology/pathology ; Review Literature as Topic ; }, abstract = {Helicobacter pylori (H. pylori) infection plays a critical role in gastric diseases, impacting the microbiota structure in gastric and duodenal ulcers. In their study, Jin et al utilized metagenomic sequencing to analyze mucosal samples from patients with ulcers and healthy controls, revealing significant changes in microbial diversity and composition. This article reviews their findings, emphasizing H. pylori's role in gastric ulcers and the need for further research on its impact on duodenal ulcers. We evaluate the study's strengths and limitations, suggesting future research directions to enhance our understanding of H. pylori's contribution to ulcerative diseases.}, }
@article {pmid39991683, year = {2025}, author = {Darnindro, N and Abdullah, M and Sukartini, N and Rumende, CM and Pitarini, A and Nursyirwan, SA and Fauzi, A and Makmun, D and Nelwan, EJ and Shatri, H and Rinaldi, I and Tanadi, C}, title = {Differences in diversity and composition of mucosa-associated colonic microbiota in colorectal cancer and non-colorectal cancer in Indonesia.}, journal = {World journal of gastroenterology}, volume = {31}, number = {7}, pages = {100051}, pmid = {39991683}, issn = {2219-2840}, mesh = {Humans ; Indonesia/epidemiology ; Male ; Middle Aged ; Female ; *Colorectal Neoplasms/microbiology/pathology ; Case-Control Studies ; *Gastrointestinal Microbiome/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Colonoscopy ; Aged ; *Intestinal Mucosa/microbiology ; *Colon/microbiology/pathology ; Adult ; RNA, Ribosomal, 16S/genetics ; Metagenomics ; }, abstract = {BACKGROUND: Colorectal cancer is the third most common malignancy and the fourth leading cause of cancer-related deaths worldwide. Several studies have shown an association between gut microbiota and colorectal cancer. Gut microbiota is unique and can be influenced by geographic factors and habits. This study aimed to determine the diversity and composition of colonic mucosal microbiota in patients with and without colorectal cancer.<br><br>AIM: To determine the diversity and composition of colonic mucosal microbiota in patients with and without colorectal cancer in Indonesia.<br><br>METHODS: This case-control study included 59 subjects (35 colorectal cancer patients and 24 non-colorectal cancer patients indicated for colonoscopy at Dr. Cipto Mangunkusumo Gastrointestinal Endoscopy Center and Fatmawati Hospital. Microbiota examination was performed using 16S rRNA sequencing. Bioinformatics analysis was performed using the wf-metagenomics pipeline from EPI2Me-Labs (Oxford Nanopore Technologies platform).<br><br>RESULTS: Patients with colorectal cancer had a higher median index value on the Shannon index (3.28 vs 2.82, P > 0.05) and a lower value on the Simpson index (0.050 vs 0.060, P > 0.05). Significant differences in beta diversity were observed at the genus (P = 0.002) and species levels (P = 0.001). Firmicutes, Proteobacteria, Bacteroidetes, and Fusobacteria were the dominant phyla. The genera Bacteroides, Campylobacter, Peptostreptococcus, and Parvimonas were found more frequently in colorectal cancer, while Faecalibacterium, Haemophilus, and Phocaeicola were more frequently found in non-colorectal cancer. The relative abundance of Fusobacterium nucleatum, Bacteroides fragilis, Enterococcus faecalis, Campylobacter hominis, and Enterococcus faecalis species was significantly elevated in patients with colorectal cancer. Meanwhile, Faecalibacterium prausnitzii, Faecalibacterium duncaniae, and Prevotella copri were more commonly found in non-colorectal cancer.<br><br>CONCLUSION: Patients with colorectal cancer exhibit distinct differences in the composition and diversity of their colonic mucosal microbiota compared to those with non-colorectal cancer. This study was reviewed and approved by the Ethics Committee of Faculty of Medicine, Universitas Indonesia (No. KET-1517/UN2.F1/ETIK/PPM.00.02/2023).}, }
@article {pmid39987648, year = {2025}, author = {Zampieri, A and Carraro, L and Mohammadpour, H and Rovere, GD and Milan, M and Fasolato, L and Cardazzo, B}, title = {Presence and characterization of the human pathogenic Vibrio species in the microbiota of Manila clams using cultural and molecular methods.}, journal = {International journal of food microbiology}, volume = {433}, number = {}, pages = {111113}, doi = {10.1016/j.ijfoodmicro.2025.111113}, pmid = {39987648}, issn = {1879-3460}, mesh = {Animals ; *Bivalvia/microbiology ; *Vibrio/isolation &amp; purification/genetics/classification ; *Microbiota ; *Shellfish/microbiology ; Humans ; Metagenomics ; Food Contamination/analysis ; }, abstract = {The North Adriatic lagoons and the Po River Delta are important areas for farming Manila clams (Ruditapes philippinarum). These areas have been heavily impacted by climate change, reducing livestock numbers and increasing pathogen spread. Shellfish, particularly clams, are primary vectors for Vibrio pathogens affecting humans. In this study, the occurrence of human pathogenic Vibrio species on Manila clams was investigated using an integrated approach that combined culture-dependent and culture-independent techniques. Samples were collected over three years from farming areas in the northeastern Adriatic lagoons and the Po River Delta, regions seriously impacted by climate change and pollution. In this study, species of the human pathogen Vibrio were analyzed in the clam microbiota and characterized using recA-pyrH metabarcoding and shotgun metagenomics. Human pathogenic Vibrio species were widespread in the clam microbiota, especially in summer, demonstrating that the environmental conditions on the northern Adriatic coasts allowed the growth of these bacteria. V. parahaemolyticus and V. vulnificus were also quantified using qPCR in <50 % of summer samples Shotgun metagenomics revealed the similarity of V. parahaemolyticus strains to other worldwide genomes, enabling improved pathogen identification and tracking. In the future, climate change could cause these conditions to become even more favorable to these bacteria, potentially increasing pathogen spread. Consequently, enhanced monitoring and control of both the environment and seafood products should be planned to ensure food safety.}, }
@article {pmid39986751, year = {2025}, author = {Wang, C and Zhao, J and Zhao, W and Xue, L and Chen, Y and Tian, J and Wang, H and Ji, X and Tian, X and Zhang, J and Gu, Y}, title = {A comparative study of the composition of microorganisms and metabolites in different β-casein genetic types of dairy cows based on metagenomics and non-targeted metabolomics.}, journal = {Food research international (Ottawa, Ont.)}, volume = {204}, number = {}, pages = {115859}, doi = {10.1016/j.foodres.2025.115859}, pmid = {39986751}, issn = {1873-7145}, mesh = {Animals ; Cattle ; *Caseins/genetics/metabolism ; *Metabolomics/methods ; *Metagenomics/methods ; Female ; *Gastrointestinal Microbiome ; *Rumen/microbiology/metabolism ; Milk/chemistry ; Arachidonic Acid/metabolism ; *Bacteria/classification/metabolism/genetics ; Genotype ; }, abstract = {β-Casein is the main component of cow's milk protein, with A1 and A2 β-casein being the most common. Of these, A1 β-casein hydrolysate produces BCM-7, which can cause lactose intolerance, while A2 β-casein milk is more gentle on the gut. However, there is limited research on the composition of rumen microbiota, metabolites, and host metabolites in different genotype cows using metagenomics and metabolomics. In this study, we used multi-omics analysis techniques to perform enrichment analysis of differential metabolites, identifying three key metabolic pathways in all three groups: Arachidonic acid metabolism and Tryptophan metabolism. The metabolites in these pathways exhibited unique metabolic characteristics within each group. We then used random forests and ROC to predict key metabolites in these pathways, identifying that the signature metabolites in the A2A2 group were predominantly anti-inflammatory substances, including 12-HETE, PGD2-4d, and Arachidonic Acid. The signature metabolites in the A1A2 group and A2A2 group were Indoleacetaldehyde. The AUC of these signature metabolites was greater than 0.85. Macrogenic linear discriminant analysis (LDA > 2.5) found that the microorganisms with greater contribution were concentrated in the A2A2 group. Compared with the other two groups, g_Bacteroides and g_Parabacteroides were mainly enriched in the A1A2 group. In group A2A2, g_Xanthomonas and g_Acetobacter are mainly enriched. Then, the key microorganisms in A1A2 group were identified by correlation analysis as g_Bacteroides and g_Parabacteroides. The key microorganisms in group A2A2 were g_Acetobacter, g_Xanthomonas and g_Mannheimia, which were consistent with the results of LEfSe analysis. These microorganisms mainly affect the degradation of fiber in the diet, host metabolism and the occurrence of inflammation. In conclusion, our results provide theoretical basis and data support for the study of dairy cows with different genotypes of β-casein, and help to determine the potential biological functions of different genotypes of casein in dairy products and their effects on human health.}, }
@article {pmid39986042, year = {2025}, author = {Bacha, LF and Oliveira, MAP and Landuci, F and Vicente, AC and Paz, PH and Lima, M and Hilário, M and Campos, LS and Thompson, M and Chueke, C and Tschoeke, D and Ottoni, A and Teixera, LM and Cosenza, C and de Souza, W and de Rezende, C and Thompson, C and Thompson, F}, title = {Antibiotic-resistance genes and metals increase in polluted tropical rivers of the Baia da Ilha Grande, Rio de Janeiro, Brazil.}, journal = {The Science of the total environment}, volume = {968}, number = {}, pages = {178778}, doi = {10.1016/j.scitotenv.2025.178778}, pmid = {39986042}, issn = {1879-1026}, mesh = {Brazil ; *Water Pollutants, Chemical/analysis ; *Rivers/chemistry/microbiology ; *Environmental Monitoring ; *Drug Resistance, Microbial/genetics ; *Metals/analysis ; Genes, Bacterial ; }, abstract = {Baia da Ilha Grande (BIG), Rio de Janeiro, Brazil, is one of the largest bays in the world. BIG is important because it serves as a route for the mining and oil industries and plays a vital role in mariculture activities. However, BIG has suffered significant impacts in recent years due to increased pollution and climate change, culminating in a local mariculture collapse. We examined the pollution levels of the bay. Biogeochemical, microbiological, and metagenomics analyses were conducted in ten rivers during the 2022 dry and rainy seasons. Combined data analyses showed that the bay's ten most significant rivers are polluted and classified into three decreasing levels of pollution groups (P1-P3). The P1 group (Centro, Japuíba, Jacuecanga) had the worst-case scenario for all pollution types, and the highest number of the nearby populations, nautical workshops and hospitals. Whereas the P2 (Jacarei, Perequeaçu and Taquari) and P3 (Frade, Bracuí, Mambucaba, São Roque) had relatively reduced pollution, as shown mainly by fecal bacteria. Metals, such as Al (>0.3 mg/L), Fe (>1.4 mg/L), Pb (>0.15 mg/L), and resistance genes (∼2 % metagenomic profile) were also more abundant in P1. High levels of metals and antibiotic resistance genes were a strong indication of pollution. The results from this study shed light on the health status of BIG rivers for further conservation programs and public policies to prevent rivers and marine biodiversity losses, and they serves as a warning on the urgent need to treat effluents in the region.}, }
@article {pmid39985639, year = {2025}, author = {Zhang, N and Tran, S and Moskatel, LS}, title = {The Gut Microbiome and Migraine: Updates in Understanding.}, journal = {Current neurology and neuroscience reports}, volume = {25}, number = {1}, pages = {20}, pmid = {39985639}, issn = {1534-6293}, mesh = {Humans ; *Migraine Disorders/microbiology ; *Gastrointestinal Microbiome/physiology ; Animals ; *Dysbiosis/microbiology ; }, abstract = {PURPOSE OF REVIEW: We provide an overview of the field of microbiome research, the current understanding of the microbiome-gut-brain axis, and the most recent updates on the interplay between migraine and the gut microbiome.<br><br>RECENT FINDINGS: Pre-clinical studies suggest that gut microbiota is required for normal pain sensation. There is also evidence in rodent models that there is potential application of food, herbal medicines, probiotics, and short chain fatty acids (SCFAs) as novel therapies for migraine. Evidence from human cohorts suggests that there is altered gut microbiota in people with migraine, and that the microbiome dysbiosis is from both compositional and functional aspects. Recent metagenome-wide association studies (MWAS) that employ Mendelian Randomization support the causal association between gut microbiota and migraine. The connection between migraine and the gut microbiome remains underexplored, but recent preclinical and clinical studies support the association between gut microbiota and the development of migraine.}, }
@article {pmid39985228, year = {2025}, author = {Song, MJ and Freund, F and Tribble, CM and Toffelmier, E and Miller, C and Bradley Shaffer, H and Li, FW and Rothfels, CJ}, title = {The nitrogen-fixing fern Azolla has a complex microbiome characterized by varying degrees of cophylogenetic signal.}, journal = {American journal of botany}, volume = {112}, number = {3}, pages = {e70010}, doi = {10.1002/ajb2.70010}, pmid = {39985228}, issn = {1537-2197}, support = {//California Conservation Genomics Project, with funding provided to the University of California by the State of California, State Budget Act of 2019 [UC Award ID RSI-19-690224]./ ; }, mesh = {*Ferns/microbiology ; *Microbiota ; *Symbiosis ; *Nitrogen Fixation ; }, abstract = {PREMISE: Azolla is a genus of floating ferns that has closely evolved with a vertically transmitted obligate cyanobacterium endosymbiont-Anabaena azollae-that fixes nitrogen. There are also other lesser-known Azolla symbionts whose role and mode of transmission are unknown.<br><br>METHODS: We sequenced 112 Azolla specimens collected across the state of California and characterized their metagenomes to identify the common bacterial endosymbionts and assess their patterns of interaction.<br><br>RESULTS: Four genera were found across all samples, establishing that multiple Azolla endosymbionts were consistently present. We found varying degrees of cophylogenetic signal across these taxa as well as varying degrees of isolation by distance and of pseudogenation, which demonstrates that multiple processes underlie how this endosymbiotic community is constituted. We also characterized the entire Azolla leaf pocket microbiome.<br><br>CONCLUSIONS: These results show that the Azolla symbiotic community is complex and features members at potentially different stages of symbiosis evolution, further supporting the utility of the Azolla microcosm as a system for studying the evolution of symbioses.}, }
@article {pmid39984934, year = {2025}, author = {Chen, X and Wei, J and Zhang, L and Wang, H and Zhang, Y and Li, Z and Wang, X and Liu, L and Zhang, Y and Zhang, T}, title = {Association between plasma short-chain fatty acids and inflammation in human immunodeficiency virus-associated neurocognitive disorder: a pilot study.}, journal = {Lipids in health and disease}, volume = {24}, number = {1}, pages = {66}, pmid = {39984934}, issn = {1476-511X}, support = {7222091//Natural Science Foundation of Beijing Municipality/ ; 81873761//National Natural Science Foundation of China/ ; 82241072, 82072271//National Natural Science Foundation of China/ ; 7222095//Beijing Natural Science Foundation/ ; }, mesh = {Humans ; *Fatty Acids, Volatile/blood ; Male ; Pilot Projects ; Female ; Middle Aged ; Adult ; *Inflammation/blood ; Gastrointestinal Microbiome ; *HIV Infections/blood/complications/microbiology ; Cytokines/blood ; Biomarkers/blood ; Cognitive Dysfunction/blood ; *Neurocognitive Disorders/blood ; ROC Curve ; Case-Control Studies ; *AIDS Dementia Complex/blood ; }, abstract = {BACKGROUND AND AIMS: Short-chain fatty acids (SCFAs), key metabolites produced by gut microbiota, have neuroprotective effects in neurodegenerative diseases by modulating immune responses. However, their role in human immunodeficiency virus (HIV)-associated neurocognitive disorder (HAND) remains largely unexplored.<br><br>METHODS: We recruited HAND patients, HIV Control, and healthy controls (HC). Plasma SCFAs and SCFA-producing gut microbiota were quantified via gas chromatography-mass spectrometry and fecal metagenomic analysis. Inflammatory cytokine levels were measured using liquid chromatography. Receiver operating characteristic (ROC) curves were generated to evaluate the predictive accuracy of SCFAs for HAND.<br><br>RESULTS: Plasma SCFAs were significantly reduced in HAND patients, correlating with a decrease in SCFA-producing gut bacteria, such as Prevotella and its related species. Reduced SCFAs were positively correlated with pro-inflammatory cytokines and cognitive impairment, while being negatively correlated with anti-inflammatory cytokines. ROC curve analysis demonstrated that several SCFAs exhibited strong predictive accuracy for HAND status.<br><br>CONCLUSIONS: SCFAs may influence cognitive function by modulating inflammatory responses, and identifies plasma SCFAs as potential biomarkers and therapeutic targets for HAND. Further investigation is needed to delineate the mechanisms that SCFAs influence HAND pathology.}, }
@article {pmid39983954, year = {2025}, author = {Guo, J and Guan, A and Chen, M and Chen, Y and Qi, W and Cao, X and Peng, J and Liu, H and Qu, J and Jia, Z and Hu, H}, title = {Spatial distribution of potential nitrogen reduction rates and associated microbial communities revealed by metagenomic analysis in Yangtze River sediments.}, journal = {Environmental research}, volume = {272}, number = {}, pages = {121170}, doi = {10.1016/j.envres.2025.121170}, pmid = {39983954}, issn = {1096-0953}, mesh = {*Geologic Sediments/microbiology ; *Rivers/microbiology ; China ; *Nitrogen/metabolism ; Denitrification ; Metagenomics ; *Microbiota ; Bacteria/genetics/metabolism ; Oxidation-Reduction ; }, abstract = {Understanding the intricacies of nitrogen reduction processes and the composition of associated microbial communities is crucial for illuminating the reactions of ecosystems and their functions to persistent nitrogen inputs. To enhance research on the nitrogen reduction process, we determined the potential rates, quantified the relevant genes, and analyzed the macro factors in the sediments of the Yangtze River. The results showed that dissimilatory reduction of nitrate to ammonium (DNRA) dominated the N-reduction processes in the Yangtze River sediment, with average rates of 0.89 ± 0.71 nmol N g[-1] h[-1]. Meanwhile, denitrification and anammox rates were 0.73 ± 0.74 and 0.07 ± 0.07 nmol N g[-1] h[-1], respectively. The Three Gorges Dam (TGD) caused higher potential rates (nmol N g[-1] h[-1]) of denitrification (1.38), anammox (0.12), DNRA (1.48), and N2O depletion (1.49 nmol g[-1] h[-1]) in the Three Gorges Reservoir (TGR) compared to other river reaches. The average copy numbers (copies·g[-1]) of nrfA (2.96 × 10[6]), narG (8.17 × 10[5]), nirS (6.10 × 10[6]), nosZ (2.77 × 10[6]), and hzsB (3.68 × 10[5]) in TGR sediments were higher than those in the other reaches. The TGD's interception of fine sediments and nutrients enhanced microbial gene abundance, thereby favoring N-reduction processes and resulting in N2O depletion in reservoir sediments. Moreover, the TGD caused a decreased contribution gap between DNRA and denitrification in the TGR (2%) compared with the upper (35%) and lower (18%) reaches, while causing predominant anammox (50%) in the middle reach. Metagenomic results suggested that sediment particle size, along with organic carbon and inorganic nitrogen concentrations, influenced N reduction rates by affecting narG, norB and C, nrfA and H, and hzsB and C. This study reveals the spatial pattern of the N-reduction rate in the Yangtze River sediments and quantitatively defines the intensity of dam effects on sediment N-reduction rate.}, }
@article {pmid39983731, year = {2025}, author = {Saha, S and Kalathera, J and Sumi, TS and Mane, V and Zimmermann, S and Waschina, S and Pande, S}, title = {Mass lysis of predatory bacteria drives the enrichment of antibiotic resistance in soil microbial communities.}, journal = {Current biology : CB}, volume = {35}, number = {6}, pages = {1258-1268.e6}, doi = {10.1016/j.cub.2025.01.068}, pmid = {39983731}, issn = {1879-0445}, mesh = {*Soil Microbiology ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial ; *Bacteriolysis ; *Microbiota ; Microbial Interactions ; *Drug Resistance, Microbial ; Bacteria/drug effects ; }, abstract = {Numerous studies have investigated the effects of antibiotics on the evolution and maintenance of antimicrobial resistance (AMR). However, the impact of microbial interactions in antibiotic-free environments on resistance within complex communities remains unclear. We investigated whether the predatory bacterium M. xanthus, which can produce antimicrobials and employ various contact-dependent and -independent prey-killing mechanisms, influences the abundance of antibiotic-resistant bacteria in its local environment simply through its presence, regardless of active predation. We observed an association between the presence of M. xanthus in soil and the frequency of antibiotic-resistant bacteria. Additionally, culture-based and metagenomic analysis showed that coculturing M. xanthus with soil-derived communities in liquid cultures enriched AMR among non-myxobacterial isolates. This is because the lysis of M. xanthus, triggered during the starvation phase of the coculture experiments, releases diffusible growth-inhibitory compounds that enrich pre-existing resistant bacteria. Furthermore, our results show that death during multicellular fruiting body formation-a starvation-induced stress response in M. xanthus that results in over 90% cell death-also releases growth-inhibitory molecules that enrich resistant bacteria. Hence, the higher abundance of resistant bacteria in soil communities, where M. xanthus can be detected, was because of the diffusible growth-inhibitory substances that were released due to the death of M. xanthus cells during fruiting body formation. Together, our findings demonstrate how the death of M. xanthus, an important aspect of its life cycle, can impact antibiotic resistomes in natural soil communities without the anthropogenic influx of antibiotics.}, }
@article {pmid39983489, year = {2025}, author = {Karlsson, M and Jönsson, HL and Hultberg, M}, title = {Inclusion of biochar in mushroom substrate influences microbial community composition of the substrate and elemental composition of the fruiting bodies.}, journal = {The Science of the total environment}, volume = {968}, number = {}, pages = {178914}, doi = {10.1016/j.scitotenv.2025.178914}, pmid = {39983489}, issn = {1879-1026}, mesh = {*Charcoal ; *Pleurotus ; *Fruiting Bodies, Fungal/chemistry ; *Microbiota ; *Soil Microbiology ; Agaricales ; }, abstract = {Due to its structure, biochar makes the soil porous and oxygen-rich, enhancing the water-holding capacity and increasing the cation exchange capacity for a longer duration. These aspects could also be favourable for mushroom production. However, biochar has been considerably less investigated within this context. This study investigated the impact of biochar on mushroom production, quality, and the microbial communities of the substrates. Two different biochar's produced from local feedstocks, plant- or sludge based, were evaluated in the production of oyster mushrooms (Pleurotus ostreatus) at two different concentrations (5 % and 10 %). The results showed that inclusion of biochar in the substrate negatively impacted fruiting body production. The elemental composition of the fruiting body was also affected by inclusion of biochar and partly reflected the elemental composition of the biochar. The metagenomics revealed that inclusion of biochar in the substrate altered the microbial community structure. The bacterial diversity based on Shannon indices was higher in the substrate wherein no biochar was added. Bacterial community richness (Chao 1) was higher in samples with biochar compared to the control with no added biochar. Fungal community richness based on Chao 1 indices displayed an increase in samples with an inclusion of biochar. Overall, this study provides novel insights into the impact of biochar in mushroom production regarding its concentration and the effect of the origin material of the biochar.}, }
@article {pmid39983413, year = {2025}, author = {Li, Q and Li, H and Tian, L and Wang, Y and Ouyang, Z and Li, L and Mao, Y}, title = {Genomic insights and metabolic pathways of an enriched bacterial community capable of degrading polyethylene.}, journal = {Environment international}, volume = {197}, number = {}, pages = {109334}, doi = {10.1016/j.envint.2025.109334}, pmid = {39983413}, issn = {1873-6750}, mesh = {Biodegradation, Environmental ; *Polyethylene/metabolism ; *Metabolic Networks and Pathways/genetics ; *Bacteria/metabolism/genetics ; Sewage/microbiology ; Microbiota ; }, abstract = {In the face of mounting global plastic pollution, especially concerning microplastics, biodegradation must be a sustainable solution. The key factor driving this technology is to explore efficient plastic-biodegraders from different habitats, among which activated sludge (AS) may be an important option since it holds diverse microorganisms occupying various ecological niches. Here we intend to enrich the plastic-degrading microorganisms from AS by using polyethylene (PE) plastic as the carbon and energy source. After a 28-day incubation, the weight loss of PE films reached 3% and the hydrophobicity decreased, indicating physical biodegradation. Moreover, Fourier-transform infrared spectroscopy (FTIR) results showed the formation of several new oxygen-containing functional groups on PE. Microbial analysis extracted 26 metagenome-assembled genomes (MAGs) from the enriched microbial communities. Among them MAG10, MAG21 and MAG26 displayed the increased abundance upon PE addition and harbored abundant genes related to carbohydrate transport and metabolism, suggesting their potential to degrade PE. Additionally, functional analysis revealed 14 plastic degradation-related genes, including oxidase, laccase, and lipase, indicating the significant potential in plastic degradation. Furthermore, a pathway for synergistic biodegradation of PE was proposed based on the potential PE degradation genes retrieved from MAGs. This work offers a promising and sustainable solution to plastic pollution by enriching the potential biodegraders from AS.}, }
@article {pmid39983259, year = {2025}, author = {Lyte, JM and Jia, X and Caputi, V and Zhang, D and Daniels, KM and Phillips, GJ and Lyte, M}, title = {Heat stress in chickens induces temporal changes in the cecal microbiome concomitant with host enteric serotonin responses.}, journal = {Poultry science}, volume = {104}, number = {3}, pages = {104886}, pmid = {39983259}, issn = {1525-3171}, mesh = {Animals ; *Chickens/physiology/microbiology ; *Gastrointestinal Microbiome/physiology ; *Serotonin/metabolism ; *Heat-Shock Response ; Cecum/microbiology ; Hot Temperature/adverse effects ; Male ; }, abstract = {Heat stress is a potent modulator of the avian neuroendocrine system with concomitant impact on the gut microbiome. As an interkingdom signaling molecule, serotonin is largely derived from the gut and found in large concentrations in the avian gut lumen. Despite the role of serotonin in animal stress physiology and related host-microbe interactions, whether heat stress alters avian enteric concentrations of serotonin is unknown. As such, the present study sought to determine whether acute or chronic exposure to moderate heat stress alters both enteric serotonin concentrations and the microbiome in the chicken gut. Chickens were, or were not, subjected to an acute (1 day), repeated acute (2 days) or chronic (6 days) moderate ambient cyclic heat stress (12h per day, 31°C). Enteric concentrations of serotonin were significantly decreased in the acute heat stress group (P < 0.05), and rebounded to become elevated in the chronic heat stress group (P < 0.05). Shotgun metagenomic sequencing revealed heat stress caused both functional and taxonomic changes in the cecal microbiome. Abundances of bacterial taxa that are known to interact with the host via the serotonergic system, including Lactobacillus spp., and Bifidobacterium spp., were significantly (P < 0.05) altered by heat stress. As these findings demonstrate that heat stress can alter serotonin concentrations in the chicken intestinal tract, with distinct outcomes depending on duration of the stressor, serotonergic signaling may serve as potential leverageable point of intervention in host-microbe interactions including foodborne pathogen colonization in the chicken gut. In addition, this study provides novel insight into the impact of acute and chronic heat stress on the avian microbiome, and its relationship to stress-driven changes in the enteric serotonergic system.}, }
@article {pmid39980208, year = {2025}, author = {Holman, LE and Zampirolo, G and Gyllencreutz, R and Scourse, J and Frøslev, T and Carøe, C and Gopalakrishnan, S and Pedersen, MW and Bohmann, K}, title = {Navigating Past Oceans: Comparing Metabarcoding and Metagenomics of Marine Ancient Sediment Environmental DNA.}, journal = {Molecular ecology resources}, volume = {}, number = {}, pages = {e14086}, doi = {10.1111/1755-0998.14086}, pmid = {39980208}, issn = {1755-0998}, support = {856488//H2020 European Research Council/ ; }, abstract = {The condition of ancient marine ecosystems provides context for contemporary biodiversity changes in human-impacted oceans. Sequencing sedimentary ancient DNA (sedaDNA) is an emerging method for generating high-resolution biodiversity time-series data, offering insights into past ecosystems. However, few studies directly compare the two predominant sedaDNA sequencing approaches: metabarcoding and shotgun-metagenomics, and it remains unclear if these methodological differences affect diversity metrics. We compared these methods using sedaDNA from an archived marine sediment record sampled in the Skagerrak, North Sea, spanning almost 8000 years. We performed metabarcoding of a eukaryotic 18S rRNA region (V9) and sequenced 153-229 million metagenomic reads per sample. Our results show limited overlap between metabarcoding and metagenomics, with only three metazoan genera detected by both methods. For overlapping taxa, metabarcoding detections became inconsistent for samples older than 2000 years, while metagenomics detected taxa throughout the time series. We observed divergent patterns of alpha diversity, with metagenomics indicating decreased richness towards the present and metabarcoding showing an increase. However, beta diversity patterns were similar between methods, with discrepancies only in metazoan data comparisons. Our findings demonstrate that the choice of sequencing method significantly impacts detected biodiversity in an ancient marine sediment record. While we stress that studies with limited variation in DNA degradation among samples may not be strongly affected, researchers should exonerate methodological explanations for observed biodiversity changes in marine sediment cores, particularly when considering alpha diversity, before making ecological interpretations.}, }
@article {pmid39979617, year = {2025}, author = {Ohlsson, C and Lawenius, L and Jiang, Y and Horkeby, K and Wu, J and Nilsson, KH and Koskela, A and Tuukkanen, J and Movérare-Skrtic, S and Henning, P and Sjögren, K}, title = {The beneficial effects of a probiotic mix on bone and lean mass are dependent on the diet in female mice.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {6182}, pmid = {39979617}, issn = {2045-2322}, mesh = {Animals ; Female ; *Probiotics/pharmacology/administration &amp; dosage ; Mice ; *Bone Density/drug effects ; Diet, High-Fat/adverse effects ; Gastrointestinal Microbiome ; Ovariectomy ; *Bone and Bones/drug effects ; Lacticaseibacillus paracasei ; Mice, Inbred C57BL ; Lactobacillus plantarum ; }, abstract = {Bone mass and lean mass decrease with age and these changes are associated with increased fracture risk and sarcopenia. Previous studies demonstrated that a probiotic mixture of Lacticaseibacillus paracasei DSM13434, Lactiplantibacillus plantarum DSM 15312 and DSM 15313 (L. Mix) prevents bone loss in ovariectomized (ovx) female mice. The purpose of the present study is to test if the beneficial effect of L. Mix is modified by the diet. Female mice were fed either a high-fat (HFD, 60% kcal from fat) or a low-fat (LFD, 10% kcal from fat) diet and subjected to either sham or ovx surgery and treated with L. Mix for 12 weeks. L. Mix treatment increased total body bone mineral density (p ≤ 0.01), by increasing cortical bone area, and total body lean mass (p = 0.035) in mice on LFD but not in mice on HFD. Metagenome sequencing of cecal content showed that L. Mix treatment increased the relative abundance of Lacticaseibacillus paracasei and, Lactiplantibacillus plantarum, demonstrating successful treatment. In addition, the probiotic treatment affected the overall gut microbiota composition and functionality. These findings demonstrate that the L. Mix in combination with a healthy diet is beneficial for musculoskeletal health in female mice.}, }
@article {pmid39979340, year = {2025}, author = {Di Costanzo, F and Di Marsico, M and Orefice, I and Kristoffersen, JB and Kasapidis, P and Chaumier, T and Ambrosino, L and Miralto, M and Aiese Cigliano, R and Verret, F and Tirichine, L and Trindade, M and Van Zyl, L and Di Dato, V and Romano, G}, title = {High-quality genome assembly and annotation of Thalassiosira rotula (synonym of Thalassiosira gravida).}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {310}, pmid = {39979340}, issn = {2052-4463}, mesh = {*Diatoms/genetics ; *Genome ; Molecular Sequence Annotation ; DNA Transposable Elements ; Transcriptome ; DNA Methylation ; Metagenome ; }, abstract = {Diatoms are unicellular eukaryotic microorganisms thriving in most aquatic environments thanks to the expression of biosynthetic pathways for secondary metabolites involved in defence and adaptation to environmental changes. The sequencing of the transcriptome of the cosmopolitan diatom Thalassiosira rotula Meunier 1910 (synonym of Thalassiosira gravida Cleve 1896) and of the metagenome of its associated microbiome revealed the presence of biosynthetic pathways synthesising molecules and compounds useful for the algae survival and with potential biotechnological applications. Here we present the genome of a Neapolitan T. rotula strain, which is 672 Mbp in size due to a high proportion of repetitive elements (63.59%) and segmental duplications (14%), while the number of predicted genes resulted to be comparable to that of smaller diatom genomes. DNA methylation was predominantly located in transposable elements.}, }
@article {pmid39978531, year = {2025}, author = {Perrotta, BG and Kidd, KA and Marcarelli, AM and Paterson, G and Walters, DM}, title = {Effects of chronic metal exposure and metamorphosis on the microbiomes of larval and adult insects and riparian spiders through the aquatic-riparian food web.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {371}, number = {}, pages = {125867}, doi = {10.1016/j.envpol.2025.125867}, pmid = {39978531}, issn = {1873-6424}, mesh = {Animals ; *Microbiota/drug effects ; *Insecta/microbiology/drug effects ; *Metamorphosis, Biological/drug effects ; *Spiders/microbiology ; *Food Chain ; Larva/microbiology/drug effects ; *Water Pollutants, Chemical/toxicity ; Michigan ; *Metals/toxicity ; RNA, Ribosomal, 16S ; }, abstract = {The macroinvertebrate microbiome controls various aspects of the host's physiology, from regulation of environmental contaminants to reproductive output. Aquatic insects provide critical nutritional subsidies linking aquatic and riparian food webs while simultaneously serving as a contaminant pathway for riparian insectivores in polluted ecosystems. Previous studies have characterized the transport and transfer of contaminants from aquatic to riparian ecosystems through insect metamorphosis, but both contaminant exposure and metamorphosis are energetically intensive processes that may cause host microbiomes to undergo radical transformation in structure and function, potentially affecting the host's physiology. We collected arthropods from three sites within Torch Lake, a historical copper mine in the Keweenaw Peninsula, Michigan, USA, and three sites within a nearby reference lake. Our objectives were to: 1) characterize the variation in microbiome communities and predicted metagenomic functions with legacy copper mining activity across space, among host types and family-level host taxonomy, 2) characterize how insect metamorphosis alters the microbiome community, including the degree of endosymbiotic infection, and predicted metagenomic function. We field-collected organisms, extracted their DNA, and sequenced the 16S region of the rRNA gene to characterize microbiome communities, then predicted metagenomic function. Site, lake, and host taxonomy affected the host microbiome community composition. Copper exposure increased the abundance of xenobiotic and lipid metabolism pathways in the Araneidae spider microbiome. Insect metamorphosis reduced the alpha diversity, altered the community composition, and predicted metagenomic function. We observed a bioconcentration of endosymbiotic bacteria in adult insects, especially holometabolous insects. Through metamorphosis, we observed a transition in function from xenobiotic degradation pathways to carbohydrate metabolism. Overall, contaminant exposure alters the microbiome composition in aquatic insects and riparian spiders and alters the function of the microbiome across the aquatic-riparian interface. Furthermore, metamorphosis is a critical element in shaping the aquatic insect microbiome across its life history.}, }
@article {pmid39978335, year = {2025}, author = {Wang, Z and Tian, L and Jiang, Y and Ning, L and Zhu, X and Chen, X and Xuan, B and Zhou, Y and Ding, J and Ma, Y and Zhao, Y and Huang, X and Hu, M and Fang, JY and Shen, N and Cao, Z and Chen, H and Wang, X and Hong, J}, title = {Synergistic role of gut-microbial L-ornithine in enhancing ustekinumab efficacy for Crohn's disease.}, journal = {Cell metabolism}, volume = {37}, number = {5}, pages = {1089-1102.e7}, doi = {10.1016/j.cmet.2025.01.007}, pmid = {39978335}, issn = {1932-7420}, mesh = {*Crohn Disease/drug therapy/microbiology/metabolism ; Humans ; *Gastrointestinal Microbiome/drug effects ; *Ustekinumab/therapeutic use/pharmacology ; Male ; Female ; *Ornithine/metabolism/pharmacology ; Adult ; Animals ; Mice ; Th17 Cells/immunology/metabolism/drug effects ; Middle Aged ; Faecalibacterium prausnitzii/metabolism ; Signal Transduction/drug effects ; Treatment Outcome ; Feces/microbiology ; Receptors, Interleukin/metabolism ; }, abstract = {The role of the intestinal microbiome in Crohn's disease (CD) treatment remains poorly understood. This study investigates microbe-host interactions in CD patients undergoing ustekinumab (UST) therapy. Fecal metagenome, metabolome, and host transcriptome data from 85 CD patients were analyzed using multi-omics integration and mediation analysis. Our findings reveal significant microbiome-metabolite-host interactions. Specifically, Faecalibacterium prausnitzii was linked to altered L-ornithine biosynthesis, resulting in higher L-ornithine levels in patients before UST therapy. In vivo and in vitro studies demonstrated that microbiome-derived L-ornithine enhances UST treatment sensitivity in CD by disrupting the host IL-23 receptor signaling and inhibiting Th17 cell stabilization through the IL-12RB1/TYK2/STAT3 axis. L-ornithine significantly enhances the therapeutic efficacy of UST in CD patients, as demonstrated in a prospective clinical trial. These findings suggest that targeting specific microbe-host metabolic pathways may improve the efficacy of inflammatory bowel disease (IBD) treatments.}, }
@article {pmid39978123, year = {2025}, author = {Jin, G and Wang, X and Cui, R and Yuan, S and Wang, M and Chen, Z}, title = {Comprehensive assessment of antibiotic impacts and risk thresholds on aquatic microbiomes and resistomes.}, journal = {Water research}, volume = {276}, number = {}, pages = {123262}, doi = {10.1016/j.watres.2025.123262}, pmid = {39978123}, issn = {1879-2448}, mesh = {*Anti-Bacterial Agents/pharmacology ; *Microbiota/drug effects ; Trimethoprim ; Bacteria/drug effects/genetics ; Risk Assessment ; Water Microbiology ; Water Pollutants, Chemical ; }, abstract = {Understanding the impacts of environmentally relevant low-level antibiotics on aquatic microbiomes and resistomes is crucial for risk assessment of anthropogenic antibiotic contamination. Here, we investigated the effects of seven subinhibitory concentrations of trimethoprim and lincomycin (10 ng/L to 10 mg/L), individually and in combination, on surface water microcosms over 1 and 7 days, using unspiked samples as controls. Metagenomic sequencing revealed a decrease in bacterial community α-diversity and an increase in resistome α-diversity with rising antibiotic concentrations upon 7 days of exposure. Notably, the β-diversity of both bacterial communities and resistomes exhibited a biphasic response, decreasing and then increasing with breakpoint concentrations of 2.73 µg/L and 0.68 µg/L, respectively. We also observed concentration-dependent increases in certain metagenome-assembled antibiotic-resistant bacteria (MAARB) and antibiotic resistance genes (ARGs), with minimum selective concentrations (MSCs) of 2.28 µg/L for trimethoprim targeting OXA-21 and 32.4 µg/L for lincomycin targeting erm(F). Among various metrics for identifying risk thresholds that induce significant changes in microbial taxa, resistomes, individual ARGs, and MAARB, the breakpoint concentration derived from resistome β-diversity was the most conservative. We propose integrating this metric into environmental risk assessment frameworks for antibiotics. Our study provides a systematic evaluation of antibiotic impacts on aquatic microbiomes and resistomes, offering key insights for refining risk assessments of antibiotic contamination in aquatic environments.}, }
@article {pmid39970096, year = {2024}, author = {Begmatov, SA and Beletsky, AV and Rakitin, AL and Lukina, AP and Sokolyanskaya, LO and Rakitin, AV and Glukhova, LB and Mardanov, AV and Karnachuk, OV and Ravin, NV}, title = {[Antibiotic Resistance Genes in Cattle Gut Microbiota: Influence of Housing Conditions].}, journal = {Molekuliarnaia biologiia}, volume = {58}, number = {6}, pages = {996-1006}, pmid = {39970096}, issn = {0026-8984}, mesh = {Animals ; Cattle/microbiology ; *Gastrointestinal Microbiome/genetics/drug effects ; *Anti-Bacterial Agents/pharmacology ; *Housing, Animal ; Feces/microbiology ; *Bacteria/genetics ; *Drug Resistance, Microbial/genetics ; beta-Lactamases/genetics ; }, abstract = {Resistance to antimicrobial drugs is an urgent problem not only in public health, but also in animal husbandry. The widespread use of antimicrobials in feed additives is one of the main reasons for the rapid spread of antibiotic resistance in the microbiota of the gastrointestinal tract of farm animals. To characterize antibiotic resistance genes (resistome), we performed metagenomic analysis of the feces of 24 cattle from different regions of Russia, including cows of different breeds and yaks. Animals differed in the type of housing: year-round on pastures or in barns of conventional farms, with consumption of feed additives. Although genes of resistance to aminoglycosides, β-lactams, glycopeptides, MLS antibiotics (macrolides, lincosamides, and streptogramins), phenicols, and tetracyclines were detected in samples from both groups of animals, the content of the resistome in the fecal microbiome of stall-bred cattle was about ten times higher than in animals kept on pastures. The resistome of stall cattle was dominated by β-lactamases and tetracycline resistance genes, the content of which in the microbiome was 24 and 60 times higher, respectively, than in animals kept on pastures. Apparently, the spread of resistance to β-lactams and tetracyclines in stall cattle reflects the active use of these antibiotics in livestock production. Metagenomic analysis of livestock feces can be used to quantify antibiotic resistance genes for the purpose of monitoring antimicrobial drugs used in animal husbandry.}, }
@article {pmid39969428, year = {2025}, author = {Bloom, PP and Bassis, CM and Crossette, E and Silber, JL and Norman, JM and Young, VB and Lok, ASF}, title = {Safety and efficacy of a defined bacterial consortium, VE303, to treat HE.}, journal = {Hepatology communications}, volume = {9}, number = {3}, pages = {}, pmid = {39969428}, issn = {2471-254X}, mesh = {Humans ; Male ; Middle Aged ; Female ; *Hepatic Encephalopathy/therapy/microbiology/drug therapy/etiology ; *Gastrointestinal Microbiome ; Aged ; Treatment Outcome ; Anti-Bacterial Agents/therapeutic use ; Vancomycin/therapeutic use/administration &amp; dosage ; Double-Blind Method ; Adult ; }, abstract = {BACKGROUND: Novel therapies are needed to treat HE, and microbiome modulation is a promising target. VE303 is a defined consortium of 8 purified, clonal bacterial strains, known to produce metabolites that may be beneficial in HE. We evaluated the safety and efficacy of VE303 to treat HE.<br><br>METHODS: We performed a single-center, randomized, placebo-controlled trial of VE303 in adult patients with a history of overt HE (NCT04899115). Eligible patients were taking lactulose and rifaximin, had no recent systemic antibiotics, and had MELD &#x2264;20. All patients received 5 days of oral vancomycin followed by randomization to 14 days of VE303 or placebo (2:1). The primary endpoints were incidence of serious adverse events and change in psychometric HE score (PHES) from baseline to 4 weeks after treatment. Stool samples underwent metagenomic sequencing and metabolite quantification.<br><br>RESULTS: Eighteen patients completed the trial, 56% men, with a mean age of 59 years and a mean MELD of 11. Patients who received VE303 had a mean change in PHES of +1.5 versus -1.0 in those who received a placebo (p=0.20). Two of the 12 patients who received VE303 had at least 1 serious adverse event (all overt HE hospitalizations), compared with 0/6 patients who received a placebo. In the patients who received VE303, 2 of 8 strains engrafted in >50% of patients. Both VE303 strain engraftment and increased stool butyrate production had a trend toward improved PHES.<br><br>CONCLUSIONS: VE303 was well tolerated in patients with cirrhosis and a history of overt HE, leading to the engraftment of certain VE303 strains and a higher percentage of patients with improved PHES.}, }
@article {pmid39967175, year = {2025}, author = {Aragão, MOP and Lima, FR and Passamani, FRF and Santos, MAA and Rezende, JP and Batista, LR}, title = {Fungal and bacterial diversity present on the rind and core of Natural Bloomy Rind Artisanal Minas Cheese from the Canastra region, Brazil.}, journal = {Food research international (Ottawa, Ont.)}, volume = {202}, number = {}, pages = {115724}, doi = {10.1016/j.foodres.2025.115724}, pmid = {39967175}, issn = {1873-7145}, mesh = {*Cheese/microbiology ; Brazil ; *Food Microbiology ; *Fungi/isolation &amp; purification/classification/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Animals ; Cattle ; Biodiversity ; }, abstract = {Globally recognized for its unique sensory attributes, Natural Bloomy Rind Artisanal Minas Cheese (NBRAMC) from the Canastra microregion is made from raw cow's milk using a natural starter culture derived from the local environment. During ripening process, microorganisms, predominantly Geotrichum candidum, develop on the surface, with the microbial community playing a crucial role in shaping the cheese's distinctive characteristics. This study aimed to characterize the microbial community, including filamentous fungi, yeasts, and bacteria, present in the rind and core of NBRAMC. Amplicon sequencing of the ITS and 16S rRNA gene regions was performed on rind and core samples from cheeses produced at six distinct producers. Results indicated that G. candidum and Diutina catenulata were the most prevalent fungal species, and Candida intermedia being more abundant exclusively in the interior of the cheeses. The bacterial community displayed greater diversity in the rind, with genera such as Lactococcus, Brevibacterium, and Corynebacterium variabile, while Lactococcus and Streptococcus dominated the core. An inverse relationship between D. catenulata and G. candidum abundance was noted. Significant variations in microbial community profiles were found among producers, despite their geographical proximity. While low levels of undesirable fungi were detected, some samples showed a notable presence of undesirable bacteria, indicating potential hygiene issues during cheese handling. These findings provide valuable insights into the microbial dynamics of NBRAMC, supporting the implementation of strategies that can enhance the quality and safety of the product.}, }
@article {pmid39967137, year = {2025}, author = {Espí-Malillos, A and López-Almela, I and Ruiz-García, P and López-Mendoza, MC and Carrón, N and González-Torres, P and Quereda, JJ}, title = {Raw milk at refrigeration temperature displays an independent microbiota dynamic regardless Listeria monocytogenes contamination.}, journal = {Food research international (Ottawa, Ont.)}, volume = {202}, number = {}, pages = {115637}, doi = {10.1016/j.foodres.2024.115637}, pmid = {39967137}, issn = {1873-7145}, mesh = {*Listeria monocytogenes/isolation &amp; purification/growth &amp; development/genetics ; *Milk/microbiology ; Animals ; *Microbiota ; *Food Microbiology ; *Refrigeration ; RNA, Ribosomal, 16S/genetics ; *Food Contamination/analysis ; Cattle ; Temperature ; }, abstract = {Dairy products made of raw milk are associated with hypervirulent L. monocytogenes clonal complexes (CCs) CC1, CC4, and CC6, and cause half of the reported listeriosis outbreaks in Europe. However, it is currently unknown whether the overrepresentation of L. monocytogenes hypervirulent clones in dairy products made of raw milk is conditioned by an alteration in the native raw milk microbiota growth and/or composition. In this study, the lag phase, maximal growth rate, and the final maximal concentration of mesophilic aerobic bacteria from native raw milk bacteria were measured at refrigerated temperature (4 °C) in the presence and absence of L. monocytogenes contamination. The raw milk microbiota composition and dynamics were evaluated in the presence and absence of L. monocytogenes hypervirulent (CC1, CC4, CC6), and hypovirulent (CC9 and CC121) clones at 4 °C by using 16S rRNA high-throughput sequencing. Our results showed that the growth and composition of the microbial communities naturally present in raw milk are independent of the contamination with hyper- or hypovirulent L. monocytogenes CCs at refrigeration temperature. Pseudomonas was the most abundant genus in raw milk on days 11 and 21, while Carnobacterium was the second most abundant genus regardless of the contaminant L. monocytogenes CCs. Altogether these results suggest that the overrepresentation of hypervirulent L. monocytogenes CC1, CC4, and CC6 in dairy products is not the consequence of a differential alteration in the native composition of the raw milk microbiota.}, }
@article {pmid39966520, year = {2025}, author = {Diener, C and Holscher, HD and Filek, K and Corbin, KD and Moissl-Eichinger, C and Gibbons, SM}, title = {Metagenomic estimation of dietary intake from human stool.}, journal = {Nature metabolism}, volume = {7}, number = {3}, pages = {617-630}, pmid = {39966520}, issn = {2522-5812}, support = {R01 DK133468/DK/NIDDK NIH HHS/United States ; R01DK133468//U.S. Department of Health &amp; Human Services | NIH | Office of Extramural Research, National Institutes of Health (OER)/ ; Cluster of Excellence COE7//Austrian Science Fund (Fonds zur F&#xf6;rderung der Wissenschaftlichen Forschung)/ ; }, mesh = {Humans ; *Feces/microbiology/chemistry ; *Metagenomics/methods ; Adult ; Male ; *Diet ; Female ; Gastrointestinal Microbiome/genetics ; *Eating ; Middle Aged ; Infant ; *Metagenome ; }, abstract = {Dietary intake is tightly coupled to gut microbiota composition, human metabolism and the incidence of virtually all major chronic diseases. Dietary and nutrient intake are usually assessed using self-reporting methods, including dietary questionnaires and food records, which suffer from reporting biases and require strong compliance from study participants. Here, we present Metagenomic Estimation of Dietary Intake (MEDI): a method for quantifying food-derived DNA in human faecal metagenomes. We show that DNA-containing food components can be reliably detected in stool-derived metagenomic data, even when present at low abundances (more than ten reads). We show how MEDI dietary intake profiles can be converted into detailed metabolic representations of nutrient intake. MEDI identifies the onset of solid food consumption in infants, shows significant agreement with food frequency questionnaire responses in an adult population and shows agreement with food and nutrient intake in two controlled-feeding studies. Finally, we identify specific dietary features associated with metabolic syndrome in a large clinical cohort without dietary records, providing a proof-of-concept for detailed tracking of individual-specific, health-relevant dietary patterns without the need for questionnaires.}, }
@article {pmid39966419, year = {2025}, author = {Heidrich, V and Fackelmann, G and Malesevic, M and Armanini, F and Dey, H and Mengoni, C and Stanisavljevic, N and Vukotic, G and Segata, N}, title = {Newly identified species from the dog dental plaque microbiome highlight little overlap with humans.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {30}, pmid = {39966419}, issn = {2055-5008}, mesh = {Dogs/microbiology ; Animals ; *Dental Plaque/microbiology ; Humans ; *Microbiota ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Metagenome ; Sequence Analysis, DNA ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Understudied pet-associated microbiomes represent a rich source for the discovery of microbial taxa important for pet and human health. From a cohort of 23 dogs, we sampled and metagenomically sequenced 64 dental plaque microbiomes, generating 1945 metagenome-assembled genomes spanning 347 microbial species, including 277 undercharacterized species without cultivated representatives. Integration with human microbiome data revealed the dog plaque microbiome is more diverse than - and shows little overlap (5.9% species in common) with - the human plaque microbiome, even though some shared periodontal pathobionts arise as a potential concern.}, }
@article {pmid39964655, year = {2025}, author = {Pitt, A and Lienbacher, S and Schmidt, J and Neumann-Schaal, M and Wolf, J and Wenng, H and Oren, A and Huber, Z and Hahn, MW}, title = {Biodiversity of strains belonging to the freshwater genus Aquirufa in a riparian forest restoration area in Salzburg, Austria, with a focus on the description of Aquirufa salirivi sp. nov. and Aquirufa novilacunae sp. nov.}, journal = {International microbiology : the official journal of the Spanish Society for Microbiology}, volume = {}, number = {}, pages = {}, pmid = {39964655}, issn = {1618-1905}, abstract = {During a citizen science project, four freshwater habitats in a riparian forest restoration area in Salzburg, Austria, were sampled. The primary aim was to obtain bacterial strains of the genus Aquirufa, a group of typical and widespread freshwater bacteria. Numerous pure cultures of Aquirufa strains could be obtained, three of them originating from the river Salzach, a newly created pond and the lake Ausee represented new species. Strain 1-SAACH-A3[T] was characterized by a genome size of 3.2 Mbp and a G + C value of 38.4 mol% and encoded genes predicted for nitrate uptake and nitrous oxide utilization. Strains BAHN-186B[T] and 2-AUSEE-184A6 were characterized by a genome size of 2.4 Mbp and a G + C value of 42.4 and 42.2 mol%, respectively, and encoded genes predicted for the light-harvesting rhodopsin system. Calculated whole-genome average nucleotide identity values with Aquirufa type strains resulted in a maximum value of 93.65% for comparison of strain 1-SAACH[T] with the type strain of Aquirufa ecclesiirivi, which is slightly under the proposed threshold of species demarcation. The calculated gANI value comparing strains BAHN-186B[T] and 2-AUSEE-184A6 revealed 95.76%, thus a value slightly above the threshold. Further analyses revealed that the three new strains represent two new species, proposed here as Aquirufa salirivi sp. nov. with type strain 1-SAACH-A3[T] (= DSM 117800[ T] = JCM 37097[ T]) and Aquirufa novilacunae sp. nov. with type strain BAHN-186B[T] (= DSM 118143[ T] = JCM 37099[ T]). Analyses of 123 publicly available metagenomes and a metagenome of the lake Ausee resulted in no detection of A. salirivi sp. nov. In contrast, A. novilacunae sp. nov. could be detected in 15 water samples of rivers, mainly from Asia, but also from North America and Australia. The analyses suggested that the species occurs in most of these samples in low relative abundance, detections derived from metagenomes of water samples from the river Yangtze in the subtropical zone could be interpreted as occurrence in higher abundances.}, }
@article {pmid39962619, year = {2025}, author = {Foucault, P and Halary, S and Duval, C and Goto, M and Marie, B and Hamlaoui, S and Jardillier, L and Lamy, D and Lance, E and Raimbault, E and Allouti, F and Troussellier, M and Bernard, C and Leloup, J and Duperron, S}, title = {A summer in the greater Paris: trophic status of peri-urban lakes shapes prokaryotic community structure and functional potential.}, journal = {Environmental microbiome}, volume = {20}, number = {1}, pages = {24}, pmid = {39962619}, issn = {2524-6372}, support = {COM2LIFE (ANR-20-CE32-0006)//Agence Nationale de la Recherche/ ; COM2LIFE (ANR-20-CE32-0006)//Agence Nationale de la Recherche/ ; }, abstract = {With more than 12 million inhabitants, the Greater Paris offers a "natural laboratory" to explore the effects of eutrophication on freshwater lake's microbiomes within a relative restricted area (~ 70 km radius). Here, a 4-months survey was carried out during summertime to monitor planktonic microbial communities of nine lakes located around Paris (Île-de-France, France) of comparable morphologies, yet distinct trophic statuses from mesotrophic to hypereutrophic. By thus minimizing the confounding factors, we investigated how trophic status could influence prokaryotic community structures (16S rRNA gene sequencing) and functions (shotgun metagenomics). These freshwater lakes harbored highly distinct and diverse prokaryotic communities, and their trophic status appears as the main driver explaining both differences in community structure and functional potential. Although their gene pool was quite stable and shared among lakes, taxonomical and functional changes were correlated. According to trophic status, differences in phosphorus metabolism-related genes were highlighted among the relevant functions involved in the biogeochemical cycles. Overall, hypereutrophic lakes microbiomes displayed the highest contrast and heterogeneity over time, suggesting a specific microbial regime shift compared to eutrophic and mesotrophic lakes.}, }
@article {pmid39961991, year = {2025}, author = {Booth, ME and Wood, HM and Travis, MA and ,  and Quirke, P and Grabsch, HI}, title = {The relationship between the gastric cancer microbiome and clinicopathological factors: a metagenomic investigation from the 100,000 genomes project and The Cancer Genome Atlas.}, journal = {Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association}, volume = {28}, number = {3}, pages = {358-371}, pmid = {39961991}, issn = {1436-3305}, support = {/WT_/Wellcome Trust/United Kingdom ; }, mesh = {Humans ; *Stomach Neoplasms/microbiology/pathology/genetics ; Male ; Female ; Middle Aged ; Microsatellite Instability ; Metagenomics/methods ; Aged ; *Gastrointestinal Microbiome ; Adult ; }, abstract = {BACKGROUND: Findings from previous gastric cancer microbiome studies have been conflicting, potentially due to patient and/or tumor heterogeneity. The intratumoral gastric cancer microbiome and its relationship with clinicopathological variables have not yet been characterized in detail. We hypothesized that variation in gastric cancer microbial abundance, alpha diversity, and composition is related to clinicopathological characteristics.<br><br>METHODS: Metagenomic analysis of 529 GC samples was performed, including whole exome sequencing data from The Cancer Genome Atlas (TCGA) and whole genome sequencing data from the 100,000 Genomes Project. Microbial abundance, alpha diversity, and composition were compared across patient age, sex, tumor location, geographic origin, pathological depth of invasion, pathological lymph node status, histological phenotype, microsatellite instability status, and TCGA molecular subtype.<br><br>RESULTS: Gastric cancer microbiomes resembled previous results, with Prevotella, Selenomonas, Stomatobaculum, Streptococcus, Lactobacillus, and Lachnospiraceae commonly seen across both cohorts. Within the TCGA cohort, microbial abundance and alpha diversity were greater in gastric cancers with microsatellite instability, lower pathological depth&#xa0;of invasion, intestinal-type histology, and those originating from Asia. Microsatellite instability status was associated with microbiome composition in both cohorts. Sex and pathological depth&#xa0;of invasion&#xa0;were associated with microbiome composition in the TCGA cohort.<br><br>CONCLUSION: The intratumoral gastric cancer microbiome appears to differ according to clinicopathological factors. Certain clinicopathological factors associated with favourable outcomes in gastric cancer were observed to be associated with greater microbial abundance and diversity. This highlights the need for further work to understand the underlying biological mechanisms behind the observed microbiome differences and their potential clinical and therapeutic impact.}, }
@article {pmid39961944, year = {2025}, author = {Andraskar, J and Khan, D and Yadav, S and Kapley, A}, title = {Metagenomic Analysis of Microbial Community Associated with Food Waste Composting.}, journal = {Applied biochemistry and biotechnology}, volume = {197}, number = {5}, pages = {3503-3520}, pmid = {39961944}, issn = {1559-0291}, support = {DBT/JRF/BET-18/1/2018/AL/23//Department of Biotechnology, Ministry of Science and Technology, India/ ; }, mesh = {*Composting ; *Metagenomics ; *Bacteria/genetics ; *Food ; *Microbiota ; *Metagenome ; *Soil Microbiology ; Food Loss and Waste ; }, abstract = {Food waste is an increasing cause of concern in India. Its management through composting plays a vital role in managing the biodegradable fraction of municipal solid waste. However, the existing composting process has many challenges, such as the lack of optimum microenvironment and microbiome knowledge, which limits efficient outcomes. Therefore, the present study aims to bridge the gap by applying metagenomics to study microbial community dynamicity during different stages of composting. The bacterial community analysis showed that genus Marionobacter (9.4%) and Halomonas (7.4%) were prevalent during the mesophilic stage, whereas the Bacillus (12.2%) and Cellulomonas (0.1%) were prevalent during the thermophilic and maturation stage of composting. The functional profiling of metagenome indicated the abundance of genes involved in degradation of polymeric compounds such as carbohydrates, lipids, and proteins. The relative abundance of arginine and proline metabolisms increased during the thermophilic stage. Whereas the relative abundance of genes involved in fatty acid, tryptophan, galactose, and propanoate metabolisms declined. Similarly, the CAZyme tool predicted that the genes encoding for glycoside hydrolase (GH) families were higher during the mesophilic and thermophilic stages of composting. These enzymes play an important role in degradation of complex polysaccharides such as cellulose and hemicellulose. The data obtained from the present study could be utilized for the optimization and improving the composting process.}, }
@article {pmid39961017, year = {2025}, author = {Colman, DR and Templeton, AS and Spear, JR and Boyd, ES}, title = {Microbial ecology of serpentinite-hosted ecosystems.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {39961017}, issn = {1751-7370}, support = {80NSSC21K0489//NASA Exobiology and Evolutionary Biology program/ ; }, mesh = {*Ecosystem ; *Microbiota ; Bacteria/genetics/classification ; }, abstract = {Serpentinization, the collective set of geochemical reactions initiated by the hydration of ultramafic rock, has occurred throughout Earth history and is inferred to occur on several planets and moons in our solar system. These reactions generate highly reducing conditions that can drive organic synthesis reactions potentially conducive to the emergence of life, while concomitantly generating fluids that challenge life owing to hyperalkalinity and limited inorganic carbon (and oxidant) availability. Consequently, the serpentinite-hosted biosphere offers insights into the earliest life, the habitable limits for life, and the potential for life on other planets. However, the support of abundant microbial communities by serpentinites was only recognized ~20 years ago with the discovery of deep-sea hydrothermal vents emanating serpentinized fluids. Here, we review the microbial ecology of both marine and continental serpentinization-influenced ecosystems in conjunction with a comparison of publicly available metagenomic sequence data from these communities to provide a global perspective of serpentinite microbial ecology. Synthesis of observations across global systems reveal consistent themes in the diversity, ecology, and functioning of communities. Nevertheless, individual systems exhibit nuances due to local geology, hydrology, and input of oxidized, near-surface/seawater fluids. Further, several new (and old) questions remain including the provenance of carbon to support biomass synthesis, the physical and chemical limits of life in serpentinites, the mode and tempo of in situ evolution, and the extent that modern serpentinites serve as analogs for those on early Earth. These topics are explored from a microbial perspective to outline key knowledge-gaps for future research.}, }
@article {pmid39958933, year = {2025}, author = {Kuźmycz, O and Kowalczyk, A and Bolanowska, A and Drozdzowska, A and Lach, J and Wierzbińska, W and Kluz, T and Stączek, P}, title = {A comprehensive analysis of the uterine microbiome in endometrial cancer patients - identification of Anaerococcus as a potential biomarker and carcinogenic cofactor.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1511625}, pmid = {39958933}, issn = {2235-2988}, mesh = {Humans ; Female ; *Endometrial Neoplasms/microbiology/pathology ; *Microbiota ; RNA, Ribosomal, 16S/genetics ; *Uterus/microbiology ; Middle Aged ; Fibroblasts/microbiology ; Biomarkers ; DNA, Bacterial/genetics ; Sequence Analysis, DNA ; Aged ; Oxidative Stress ; }, abstract = {INTRODUCTION: Endometrial cancer (EC) is a significant gynecological malignancy with increasing incidence worldwide. Emerging evidence highlights the role of the uterine microbiome in the pathogenesis of EC. This study aims to characterize the uterine microbiome in EC patients and identify potential microbial biomarkers, with a focus on Anaerococcus as a differentiating taxon.<br><br>METHODS: The endocervical canal swabs from patients with EC (n=16) and non-cancerous patients (EM, n=13) were collected. The V3-V4 region of the 16S rRNA gene was sequenced using the Illumina platform. Bioinformatic analyses were performed with QIIME2, and statistical comparisons were conducted to assess differences in microbial composition and diversity. In vitro experiments were conducted to assess the functional impact of Anaerococcus on human uterine fibroblasts, including its ability to adhere to the human cells and induce oxidative stress.<br><br>RESULTS: The &#x3b1;-diversity metrics, including Shannon entropy and observed amplicon sequence variants (ASVs), revealed significantly higher microbial diversity in EC samples compared to EM. Anaerococcus was identified as a key taxon differentiating EC from EM groups, showing a higher relative abundance in EC samples. Functional predictions and in vitro assays indicated that Anaerococcus may contribute to carcinogenesis by inducing reactive oxygen species (ROS) production, and has the high ability to adhere to the human endometrial fibroblasts.<br><br>DISCUSSION: The study provides evidence of distinct microbial signatures in EC, with Anaerococcus emerging as a potential biomarker. The in vitro findings suggest its role in endometrial carcinogenesis, underscoring its potential as a target for future diagnostic and therapeutic applications.}, }
@article {pmid39956369, year = {2025}, author = {Abe, M and Sekizuka, T and Miyazaki, Y}, title = {Gastrointestinal anaerobes and Enterococcus faecalis promote Candida glabrata gastrointestinal colonization and organ dissemination.}, journal = {Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy}, volume = {31}, number = {4}, pages = {102658}, doi = {10.1016/j.jiac.2025.102658}, pmid = {39956369}, issn = {1437-7780}, mesh = {*Candida glabrata/isolation &amp; purification/pathogenicity ; Animals ; Mice ; *Candidiasis/microbiology/immunology ; *Gastrointestinal Microbiome ; *Enterococcus faecalis/isolation &amp; purification ; *Gastrointestinal Tract/microbiology ; Coinfection/microbiology ; Disease Models, Animal ; Dysbiosis/microbiology ; *Bacteria, Anaerobic/isolation &amp; purification ; Anti-Bacterial Agents/pharmacology ; Female ; Metagenomics ; }, abstract = {BACKGROUND: Candida glabrata is a common causative pathogen of endogenous candidiasis. It is assumed that the gastrointestinal flora affects C. glabrata gastrointestinal colonization and organ dissemination in the gastrointestinal tract (GIT). However, no reports have yet described the relationships between C. glabrata and bacteria in the GIT. This study aimed to clarify these relationships using a mouse endogenous candidiasis model with cortisone acetate immunosuppression.<br><br>METHODS: Dysbiosis was induced in the GIT by several antibiotic combinations, and then C. glabrata gastrointestinal colonization and organ dissemination were evaluated. Next, metagenomic sequencing analysis of the gastrointestinal flora was performed to identify bacteria associated with C. glabrata organ dissemination. Finally, coinfection experiments were performed using bacteria isolated from the mouse GIT.<br><br>RESULTS: C. glabrata organ dissemination was significantly promoted using specific antibiotics regardless of the amount of colonization in the GIT. Metagenomic sequencing analysis of the gastrointestinal flora showed that Enterococcus species and anaerobes were significantly associated with enhanced organ dissemination, whereas Enterobacterales, such as Escherichia species and Klebsiella species, were associated with the suppression of organ dissemination. In coinfection experiments, Enterococcus faecalis and Faecalibaculum rodentium inoculation, but not either of them, increased C. glabrata organ dissemination without affecting gastrointestinal colonization.<br><br>CONCLUSIONS: Coinfection with gastrointestinal bacteria promoted C. glabrata organ dissemination, which would indicate that gastrointestinal flora could affect C. glabrata dissemination. Therefore, the gastrointestinal flora could be a target for intervention or treatment in clinical settings. Insights from this study would lead to better control of endogenous candidiasis focusing on the gastrointestinal flora.}, }
@article {pmid39956110, year = {2025}, author = {Echeveste Medrano, MJ and Smith, GJ and Sánchez-Andrea, I and Jetten, MSM and Welte, CU}, title = {Contrasting Methane, Sulfide and Nitrogen-Loading Regimes in Bioreactors Shape Microbial Communities Originating From Methane-Rich Coastal Sediment of the Stockholm Archipelago.}, journal = {Environmental microbiology}, volume = {27}, number = {2}, pages = {e70056}, pmid = {39956110}, issn = {1462-2920}, support = {854088//European Commission/ ; 024.002.002//Nederlandse Organisatie voor Wetenschappelijk Onderzoek/ ; VI.Vidi.223.012//Nederlandse Organisatie voor Wetenschappelijk Onderzoek/ ; }, mesh = {*Methane/metabolism/analysis ; *Sulfides/metabolism/analysis ; *Geologic Sediments/microbiology/chemistry ; *Bioreactors/microbiology ; *Microbiota ; Archaea/genetics/metabolism/classification/isolation &amp; purification ; *Nitrogen/metabolism/analysis ; Sweden ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; *Seawater/microbiology/chemistry ; Nitrates/metabolism ; Oxidation-Reduction ; Phylogeny ; }, abstract = {Coastal ecosystems are increasingly exposed to high nutrient loads and salinity intrusions due to rising seawater levels. Microbial communities, key drivers of elemental cycles in these ecosystems, consequently, experience fluctuations. This study investigates how the methane-rich coastal sediment microbiome from the Stockholm Archipelago copes with high and low nitrogen and sulfide loading by simulating coastal conditions in two methane-saturated anoxic brackish bioreactors. Over a year, the bioreactors were subjected to the same ratio of nitrate, ammonium and sulfide (2:1:1) under eutrophic or oligotrophic conditions and monitored using 16S rRNA gene amplicon and metagenomic sequencing. Sulfide was depleted in both conditions. Sulfide-dependent denitrification was the predominant process in eutrophic conditions, whereas dissimilatory nitrate reduction to ammonium dominated under oligotrophic conditions. Methane oxidation was driven by Methylobacter and Methylomonas in eutrophic conditions, whereas a more diverse methane-oxidising microbial community developed under oligotrophic conditions, which likely competed for nitrate with anaerobic methanotrophic archaea and the gammaproteobacterial MBAE14. Novel putative copper-dependent membrane-bound monooxygenases (Cu-MMOs) were identified in MBAE14 and co-enriched Rugosibacter genomes, suggesting the need for further physiological and genetic characterisation. This study highlights the importance of understanding coastal anoxic microbiomes under fluctuating conditions, revealing complex interactions and novel pathways crucial for ecosystem functioning.}, }
@article {pmid39955324, year = {2025}, author = {O' Donovan, CM and Nori, SRC and Shanahan, F and Celentano, G and Murphy, TB and Cotter, PD and Sullivan, OO}, title = {Temporal stability and lack of variance in microbiome composition and functionality in fit recreational athletes.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {5619}, pmid = {39955324}, issn = {2045-2322}, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Feces/microbiology ; Adult ; Female ; *Athletes ; Metagenomics/methods ; Running ; Young Adult ; Metagenome ; }, abstract = {Human gut microbiome composition and function is influenced by environmental and lifestyle factors, including exercise and fitness. We studied the composition and functionality of the faecal microbiome of recreational (non-elite) runners (n = 62) with serial shotgun metagenomics, at 4 time points over a 7-week period. Gut microbiome composition and function was stable over time. Grouping of samples on the basis of their fitness level (fair, good, excellent, and superior) or habitual training (low (4-6 h/week), medium (7-9 h/week), high (10-12 h/week), and extreme (13 + hours/week)) revealed no significant microbiome-related differences. Overall, the species Faecalibacterium prausnitzii, Blautia wexlerae, and Prevotella copri were the most abundant members of the gut microbiome. Analysis of co-abundance groups (CAGs) revealed no significant relationship between CAGs and fitness levels or training subgroups. Functional pathways were similar across all samples and timepoints with no clustering based on associated metadata. The most abundant genes identified within samples corresponded to pathways for nucleoside and nucleotide biosynthesis, amino acid biosynthesis, and cell wall biosynthesis. Collectively, these results describe the microbiome of active recreational runners and note temporal stability amongst participants.}, }
@article {pmid39954816, year = {2025}, author = {Ladyhina, V and Rajala, E and Sternberg-Lewerin, S and Nasirzadeh, L and Bongcam-Rudloff, E and Dicksved, J}, title = {Methodological aspects of investigating the resistome in pig farm environments.}, journal = {Journal of microbiological methods}, volume = {230-231}, number = {}, pages = {107103}, doi = {10.1016/j.mimet.2025.107103}, pmid = {39954816}, issn = {1872-8359}, mesh = {Animals ; *Metagenomics/methods ; *Bacteria/genetics/drug effects/isolation &amp; purification/classification ; Farms ; Swine/microbiology ; Computational Biology/methods ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; Microbiota/genetics ; High-Throughput Nucleotide Sequencing ; Metagenome ; Sequence Analysis, DNA ; }, abstract = {A typical One Health issue, antimicrobial resistance (AMR) development and its spread among people, animals, and the environment attracts significant research attention. The animal sector is one of the major contributors to the development and dissemination of AMR and accounts for more than 50 % of global antibiotics usage. The use of antibiotics exerts a selective pressure for resistant bacteria in the exposed microbiome, but many questions about the epidemiology of AMR in farm environments remain unanswered. This is connected to several methodological challenges and limitations, such as inconsistent sampling methods, complexity of farm environment samples and the lack of standardized protocols for sample collection, processing and bioinformatical analysis. In this project, we combined metagenomics and bioinformatics to optimise the methodology for reproducible research on the resistome in complex samples from the indoor farm environment. The work included optimizing sample collection, transportation, and storage, as well as DNA extraction, sequencing, and bioinformatic analysis, such as metagenome assembly and antibiotic resistance gene (ARG) detection. Our studies suggest that the current most optimal and cost-effective pipeline for ARG search should be based on Illumina sequencing of sock sample material at high depth (at least 25 M 250 bp PE for AMR gene families and 43 M for gene variants). We present a computational analysis utilizing MEGAHIT assembly to balance the identification of bacteria carrying ARGs with the potential loss of diversity and abundance of resistance genes. Our findings indicate that searching against multiple ARG databases is essential for detecting the highest diversity of ARGs.}, }
@article {pmid39954460, year = {2025}, author = {Luo, S and Yuan, J and Song, Y and Ren, J and Qi, J and Zhu, M and Feng, Y and Li, M and Wang, B and Li, X and Song, C}, title = {Elevated salinity decreases microbial communities complexity and carbon, nitrogen and phosphorus metabolism in the Songnen Plain wetlands of China.}, journal = {Water research}, volume = {276}, number = {}, pages = {123285}, doi = {10.1016/j.watres.2025.123285}, pmid = {39954460}, issn = {1879-2448}, mesh = {*Wetlands ; *Phosphorus/metabolism ; *Nitrogen/metabolism ; China ; *Salinity ; *Carbon/metabolism ; *Soil Microbiology ; Soil/chemistry ; Microbiota ; }, abstract = {Salinity can induce changes in the structure and function of soil microbial communities, which plays an important role in soil carbon (C), nitrogen (N) and phosphorus (P) cycling. However, there are few studies on the relationship between microbial communities and functional properties of wetland soil under elevated salinity. In this study, soil samples from Zhalong, Momoge, Niuxintaobao, and Xianghai wetlands in the Songnen Plain of China were cultured with different salinity and analyzed by metagenomic sequencing to assess the overall impact of salinity on microorganisms. The results showed that increasing soil salinity decreased soil microbial diversity and significantly changed its composition. Elevated salinity led to the replacement of core species (Sphingomonas) by halophilic species (Halomonadaceae, Halomohas campaniensis), reducing the stability of microbial ecological networks. C fixation, denitrification and purine metabolism were the key ways for the maintenance of C, N and P functions in Songnen plain wetlands, and these processes were significantly reduced with increasing salinity. Key genes involved in C, N and P metabolism include EC1.1.1.42, EC4.1.1.31, EC6.4.1.1, nosZ, nirK, purB, purC, adk, purM, and purQ. They were all effectively suppressed due to increased salinity. In summary, elevated salinity reduced the complexity of microorganisms and inhibited the related functions of C, N and P cycling, and affected the stability of wetland ecosystems. Wetland protection should be strengthened to prevent the aggravation of salinization. This study provides a new scientific framework for the restoration and management of salinized wetland ecosystems in the face of upcoming global changes.}, }
@article {pmid39954350, year = {2025}, author = {Dong, Y and Liu, H and Habimana, O}, title = {High risk of Vibrio pathogen and antibiotic resistance transfer in live seafood wet markets of Shantou, China.}, journal = {International journal of food microbiology}, volume = {432}, number = {}, pages = {111098}, doi = {10.1016/j.ijfoodmicro.2025.111098}, pmid = {39954350}, issn = {1879-3460}, mesh = {*Vibrio/genetics/drug effects/isolation &amp; purification/classification ; China ; Animals ; *Seafood/microbiology ; *Drug Resistance, Bacterial/genetics ; Anti-Bacterial Agents/pharmacology ; Humans ; Food Microbiology ; *Shellfish/microbiology ; Food Contamination/analysis ; Biofilms ; Microbiota ; }, abstract = {The global demand for seafood necessitates robust food safety practices, particularly within traditional wet markets. This study investigated the microbiomes of live Japanese mantis shrimp (JMS) and their associated environments (water and biofilm) in local wet markets to assess the risk of pathogen and antibiotic resistance gene (ARG) transfer. Metagenomic analysis showed a significant link between microbiome composition and the type of sample (shrimp, biofilm, and water). While several known human pathogens were associated with shrimp samples, water and biofilm samples exhibited higher abundances of ARGs, suggesting a high risk of pathogen and ARG transfer from the market environment. Notably, this study focused on the diversity and characterization of poorly understood Vibrio species associated with JMS. The prevalence of β-lactam resistance genes in Vibrio isolates, combined with a comparative genomic analysis of several species, highlights this concern. Our study emphasizes the need to improve hygiene practices in wet markets to reduce foodborne illness risks and address antibiotic resistance. This work represents, to our knowledge, the first comparative genomic analysis of Vibrio species in the context of JMS and wet market seafood safety.}, }
@article {pmid39953749, year = {2025}, author = {Aizpurua, O and Botnen, AB and Eisenhofer, R and Odriozola, I and Santos-Bay, L and Bjørnsen, MB and Gilbert, MTP and Alberdi, A}, title = {Functional Insights Into the Effect of Feralisation on the Gut Microbiota of Cats Worldwide.}, journal = {Molecular ecology}, volume = {34}, number = {6}, pages = {e17695}, pmid = {39953749}, issn = {1365-294X}, support = {CF20-0460//Carlsbergfondet/ ; 17417//Villum Fonden/ ; DNRF143//Danmarks Grundforskningsfond/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Cats/microbiology ; Animals, Wild/microbiology ; Metagenomics ; Metagenome ; Male ; Female ; }, abstract = {Successfully adapting to a feral lifestyle with different access to food, shelter and other resources requires rapid physiological and behavioural changes, which could potentially be facilitated by gut microbiota plasticity. To investigate whether alterations in gut microbiota support this transition to a feral lifestyle, we analysed the gut microbiomes of domestic and feral cats from six geographically diverse locations using genome-resolved metagenomics. By reconstructing 229 non-redundant metagenome-assembled genomes from 92 cats, we identified a typical carnivore microbiome structure, with notable diversity and taxonomic differences across regions. While overall diversity metrics did not differ significantly between domestic and feral cats, hierarchical modelling of species communities, accounting for geographic and sex covariates, revealed significantly larger microbial functional capacities among feral cats. The increased capacity for amino acid and lipid degradation corresponds to feral cats' dietary reliance on crude protein and fat. A second modelling analysis, using behavioural phenotype as the main predictor, unveiled a positive association between microbial production of short-chain fatty acids, neurotransmitters and vitamins and cat aggressiveness, suggesting that gut microbes might contribute to heightened aggression and elusiveness observed in feral cats. Functional microbiome shifts may therefore play a significant role in the development of physiological and behavioural traits advantageous for a feral lifestyle, a hypothesis that warrants validation through microbiota manipulation experiments.}, }
@article {pmid39952771, year = {2025}, author = {Cantuti Gendre, J and Le Marrec, C and Chaillou, S and Omhover-Fougy, L and Landaud, S and Dugat-Bony, E}, title = {Exploring viral diversity in fermented vegetables through viral metagenomics.}, journal = {Food microbiology}, volume = {128}, number = {}, pages = {104733}, doi = {10.1016/j.fm.2025.104733}, pmid = {39952771}, issn = {1095-9998}, mesh = {*Vegetables/virology/microbiology ; Metagenomics ; Fermentation ; *Fermented Foods/virology/microbiology ; *Bacteriophages/genetics/classification/isolation &amp; purification ; Bacteria/classification/genetics/isolation &amp; purification ; Brassica/virology/microbiology ; Microbiota ; *Viruses/classification/genetics/isolation &amp; purification ; Food Microbiology ; Biodiversity ; RNA Viruses/genetics/classification/isolation &amp; purification ; Virome ; DNA Viruses/genetics/classification/isolation &amp; purification ; Daucus carota/virology/microbiology ; }, abstract = {Fermented vegetables are traditionally produced using the endogenous microorganisms present in raw ingredients. While the diversity of bacteria and fungi in fermented vegetables has been relatively well studied, phage communities remain largely unexplored. In this study, we collected twelve samples of fermented cabbage, carrot, and turnip after fermentation and analyzed the microbial and viral communities using shotgun and viral metagenomic approaches. Assessment of the viral diversity also benefited from epifluorescence microscopy to estimate viral load. The viral metagenomics approach targeted dsDNA, ssDNA, and RNA viruses. The microbiome of fermented vegetables was dominated by lactic acid bacteria and varied according to the type of vegetable used as raw material. The analysis of metagenome-assembled-genomes allowed the detection of 22 prophages of which 8 were present as free particles and therefore detected in the metaviromes. The viral community, estimated to range from 5.28 to 7.57 log virus-like particles per gram of fermented vegetables depending on the sample, was mainly composed of dsDNA viruses, although ssDNA and non-bacterial RNA viruses, possibly originating from the phyllosphere, were also detected. The dsDNA viral community, primarily comprising bacteriophages, varied depending on the type of vegetable used for fermentation. The bacterial hosts predicted for these phages mainly belonged to Lactobacillaceae and Enterobacteriaceae families. These results highlighted the complex microbial and viral composition of fermented vegetables, which varied depending on the three types of vegetables used as raw material. Further research is needed to deepen our understanding of the impact of these viruses on the microbial ecology of fermented vegetables and on the quality of the final products.}, }
@article {pmid39952751, year = {2025}, author = {Sequino, G and Cobo-Diaz, JF and Valentino, V and Tassou, C and Volpe, S and Torrieri, E and Nychas, GJ and Álvarez Ordóñez, A and Ercolini, D and De Filippis, F}, title = {Environmental microbiome mapping in poultry processing chain and assessment of microbial dynamics in response to different storage conditions.}, journal = {Food microbiology}, volume = {128}, number = {}, pages = {104734}, doi = {10.1016/j.fm.2025.104734}, pmid = {39952751}, issn = {1095-9998}, mesh = {Animals ; *Microbiota ; Chickens/microbiology ; *Bacteria/genetics/isolation &amp; purification/classification/drug effects/pathogenicity ; Food Storage/methods ; Food Packaging ; *Meat/microbiology ; Anti-Bacterial Agents/pharmacology ; Poultry/microbiology ; Drug Resistance, Bacterial ; Food Microbiology ; *Poultry Products/microbiology ; Temperature ; }, abstract = {Poultry production chain comprises a complex network involving various stages from rearing to the final distribution of poultry products. This study explores the intricate dynamics within this chain, using shotgun metagenomics, particularly focusing on taxonomic and functional composition of the microbiome, antibiotic resistance and virulence potential. Moreover, the study of the impact of different packaging and storage conditions provides insights into how diverse packaging strategies and storage temperature can impact the shelf-life of chicken meat. Microbiome mapping in poultry processing facility revealed the dominance of Brochothrix thermosphacta, Pseudomonas fragi and Psychrobacter immobilis on poultry-based products and industrial surfaces. Indeed, surfaces of equipment and tools have a significant impact on the microbial composition of the final food products. Furthermore, the study of the microbiome dynamics in chicken meat stored in different packaging (air, modified atmosphere, under vacuum) and temperatures (0, 4 and 10 °C) revealed temperature-dependent microbiota shifts in chicken meat, highlighting specific spoilage organisms (SSOs) in the different packaging methods. Additionally, our results showed that poultry-based products and industrial surfaces belonging to carcasses processing area hosted elevated levels of Antibiotic Resistance Genes, mainly associated with resistance to aminoglycosides, β-lactams, MLSPs (which includes macrolides, lincosamides, streptogramins and pleuromutilins) amphenicols and tetracyclines classes and several Virulence-associated genes related to adherence, biofilm, effector delivery system, motility, nutritional/metabolic factors and regulation. Finally, our findings underscored a notably mobile resistome, showing multiple AR class correlated with mobile elements. This poses a considerable risk, emphasizing the urgent need for proactive measures in addressing potential antibiotic resistance genes dissemination in the poultry chain.}, }
@article {pmid39951448, year = {2025}, author = {Li, Q and Wu, X and Niu, X and Yu, Z and Fang, S and Chu, X and Zhu, J and Song, Q and Hou, C and Wei, X}, title = {Integrated metagenomic and metabolomic analyses of the effects of total flavonoids of Rhizoma Drynariae on reducing ovariectomized-induced osteoporosis by regulating gut microbiota and related metabolites.}, journal = {PloS one}, volume = {20}, number = {2}, pages = {e0317832}, pmid = {39951448}, issn = {1932-6203}, mesh = {*Gastrointestinal Microbiome/drug effects ; Female ; *Osteoporosis/drug therapy/metabolism/etiology ; Animals ; Ovariectomy/adverse effects ; Metabolomics ; *Flavonoids/pharmacology/therapeutic use ; Rats ; Bone Density/drug effects ; Metagenomics ; *Polypodiaceae/chemistry ; Rats, Sprague-Dawley ; *Drugs, Chinese Herbal/pharmacology ; }, abstract = {TFRD has been widely used in China to treat osteoporosis (OP). However, the specific molecular mechanism of TFRD against OP has not been fully clarified. Our previous studies have also proved that TFRD could attenuate OP and the clinical equivalent dose of 67.5mg/kg/d is the effective dose for TFRD treating OP. Therefore, this study used 67.5mg/kg as the dosage of TFRD in combination with multi omics to investigate the mechanism of action of TFRD in the treatment of OP. The aim of this study was to further elucidate molecular mechanism of TFRD for treating OP based on metagenomic and metabolomic analyses. In this study, hematoxylin-eosin (H&amp;E) staining, micro computed tomography (micro-CT) and bone mineral density (BMD) analysis were used to observe pharmacological effects of TFRD against ovariectomized (OVX)-induced OP. Subsequently, multiomics analysis including metagenomics, untargeted and short chain fatty acids (SCFAs) metabolomics were carried out to identify whether the anti-osteoporosis mechanism of TFRD correlated with gut microbiota and related metabolites. Our results indicate that TFRD could improve the microstructure and density of trabecular bone in OVX rats. 17 differential species, which mainly from Akkermansia, Bacteroides, and Phascolarctobacterium genus, 14 related differential metabolites and acetic acid in SCFAs were significantly altered by OVX and reversed by TFRD. Furthermore, according to results of untargeted metabolomics analysis, it was found that several metabolic pathways such as phenylalanine metabolism, phenylalanine, tyrosine and tryptophan biosynthesis and so on might play an important role in TFRD against OP. In order to further study the relationship between gut microbiota and related metabolites, spearman correlation analysis was used, and showed that gut microbiota such as Akkermansia muciniphila might be closely related to several metabolites and metabolic pathways. These findings suggest that TFRD treatment could reduce the effects of OVX-induced OP by altering community composition and abundance of gut microbiota, regulating metabolites and SCFAs. It was speculated that the gut microbiota especially Akkermansia muciniphila and related metabolites might play an important role in TFRD against OP, and deserve further study by follow-up experiment. This conclusion provides new theoretical support for mechanism research of TFRD against OP.}, }
@article {pmid39951402, year = {2025}, author = {Reiss, RA and Guerra, PA and Makhnin, O and Kellom, M}, title = {Whole metagenome sequencing and 16S rRNA gene amplicon analyses reveal the complex microbiome responsible for the success of enhanced in-situ reductive dechlorination (ERD) of a tetrachloroethene-contaminated Superfund site.}, journal = {PloS one}, volume = {20}, number = {2}, pages = {e0306503}, pmid = {39951402}, issn = {1932-6203}, support = {P20 GM103451/GM/NIGMS NIH HHS/United States ; P20 RR016480/RR/NCRR NIH HHS/United States ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Tetrachloroethylene/metabolism ; Biodegradation, Environmental ; *Microbiota/genetics ; *Metagenome ; Groundwater/microbiology ; Halogenation ; *Water Pollutants, Chemical/metabolism ; New Mexico ; }, abstract = {The North Railroad Avenue Plume (NRAP) Superfund site in New Mexico, USA exemplifies successful chlorinated solvent bioremediation. NRAP was the result of leakage from a dry-cleaning that operated for 37 years. The presence of tetrachloroethene biodegradation byproducts, organohalide respiring genera (OHRG), and reductive dehalogenase (rdh) genes detected in groundwater samples indicated that enhanced reductive dechlorination (ERD) was the remedy of choice. This was achieved through biostimulation by mixing emulsified vegetable oil into the contaminated aquifer. This report combines metagenomic techniques with site monitoring metadata to reveal new details of ERD. DNA extracts from groundwater samples collected prior to and at four, 23 and 39 months after remedy implementation were subjected to whole metagenome sequencing (WMS) and 16S rRNA gene amplicon (16S) analyses. The response of the indigenous NRAP microbiome to ERD protocols is consistent with results obtained from microcosms, dechlorinating consortia, and observations at other contaminated sites. WMS detects three times as many phyla and six times as many genera as 16S. Both techniques reveal abundance changes in Dehalococcoides and Dehalobacter that reflect organohalide form and availability. Methane was not detected before biostimulation but appeared afterwards, corresponding to an increase in methanogenic Archaea. Assembly of WMS reads produced scaffolds containing rdh genes from Dehalococcoides, Dehalobacter, Dehalogenimonas, Desulfocarbo, and Desulfobacula. Anaerobic and aerobic cometabolic organohalide degrading microbes that increase in abundance include methanogenic Archaea, methanotrophs, Dechloromonas, and Xanthobacter, some of which contain hydrolytic dehalogenase genes. Aerobic cometabolism may be supported by oxygen gradients existing in aquifer microenvironments or by microbes that produce O2 via microbial dismutation. The NRAP model for successful ERD is consistent with the established pathway and identifies new taxa and processes that support this syntrophic process. This project explores the potential of metagenomic tools (MGT) as the next advancement in bioremediation.}, }
@article {pmid39951352, year = {2025}, author = {Li, Q and Tan, D and Xiong, S and Yu, K and Su, Y and Zhu, W}, title = {Time-restricted feeding promotes glucagon-like peptide-1 secretion and regulates appetite via tryptophan metabolism of gut Lactobacillus in pigs.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2467185}, pmid = {39951352}, issn = {1949-0984}, mesh = {Animals ; *Glucagon-Like Peptide 1/metabolism ; *Tryptophan/metabolism ; Swine ; *Gastrointestinal Microbiome/physiology ; *Lactobacillus/metabolism ; Enteroendocrine Cells/metabolism ; *Appetite ; Feeding Behavior ; Hypothalamus/metabolism ; *Appetite Regulation ; Male ; }, abstract = {Previous clinical trials have shown that time-restricted feeding can be involved in regulating the metabolic health of humans and animals. However, the underlying mechanism has not been fully explored. In this study, the pig model was employed to simulate four prevalent human eating habits, with the aim of investigating the impact of gut microbiota and microbial metabolites on gut hormone secretion and appetite regulation. Compared to the ad libitum feeding (ALF) pattern, three time-restricted feeding patterns reduced total food intake and eating time. Meanwhile, three time-restricted feeding patterns induced elevated levels of serum and hypothalamic glucagon-like peptide-1 (GLP-1), while suppressing reward-related circuits in the hypothalamus. It is noteworthy that the early time-restricted feeding (eTRF) pattern increased the number of intestinal enteroendocrine cells (EECs) compared to ALF. Metagenomic and metabonomic analyses revealed that three time-restricted feeding patterns induced colonization of Lactobacillus and significantly increased the levels of its metabolite, indole-3-lactic acid (ILA). Dietary supplementation with ILA exhibited an increasing trend in fasting serum GLP-1 level of piglets. In vitro studies with pig intestinal organoids showed the Lactobacillus metabolite ILA enhanced GLP-1 secretion through the promotion of intestinal stem cell differentiation into EECs, rather than activating the ability of EECs to secrete GLP-1. Overall, time-restricted feeding promoted GLP-1 secretion and affected long-term appetite regulation by promoting the colonization of Lactobacillus and modulating microbial tryptophan metabolism.}, }
@article {pmid39950859, year = {2025}, author = {Ma, Y and Zhang, M and Wang, Z and Cao, L and Li, Y and Wan, Z and Kane, Y and Wang, G and Li, X and Zhang, C}, title = {Short-term antiretroviral therapy may not correct the dysregulations of plasma virome and cytokines induced by HIV-1 infection.}, journal = {Virulence}, volume = {16}, number = {1}, pages = {2467168}, pmid = {39950859}, issn = {2150-5608}, mesh = {Humans ; *HIV Infections/drug therapy/virology/blood/immunology ; *Cytokines/blood ; Male ; Adult ; HIV-1/drug effects ; Female ; *Virome/drug effects ; Middle Aged ; *Anti-Retroviral Agents/therapeutic use ; Metagenomics ; Anelloviridae/genetics/isolation &amp; purification ; }, abstract = {An expansion of plasma anelloviruses and dysregulation of inflammation was associated with HIV-1 infection. However, how antiretroviral therapy (ART) affects the dynamics of plasma virome and cytokine profile remains largely unknown. To characterize the dynamics of plasma virome and cytokines in HIV-1-infected individuals before and during the first year of ART, a cohort of 26 HIV-1-infected individuals and 19 healthy controls was recruited. Blood samples were collected and subjected to metagenomic analysis and the measurement of 27 cytokines. Metagenomic analysis revealed an increased abundance and prevalence of human pegivirus type 1 (HPgV-1) and a slightly decreased diversity and abundance of anellovirus in plasma of HIV-1-infected individuals after ART. No obvious impact was observed on other plasma commensal viruses. Increased abundance and prevalence of HPgV-1 were further confirmed by RT-qPCR assay in a larger cohort of 114 HIV-1-infected individuals. Notably, most dysregulated cytokines were not fully restored by ART, with extremely abnormal levels of IL-10, GM-CSF, VEGF, and eotaxin, and a significantly increased level of plasma I-FABP. Anelloviruses showed significantly negative correlations with other commensal viruses except HPgV-1 but had positive correlations with several anti-inflammatory and Th1 cytokines. These results suggest that short-term ART may not significantly correct the virome and cytokine dysregulations induced by HIV-1 infection. The results highlight a need for further investigation into the long-term effects of ART on virome and cytokine profiles in HIV-1-infected individuals.}, }
@article {pmid39950834, year = {2025}, author = {Ng, HY and Zhang, L and Tan, JT and Hui, RWH and Yuen, MF and Seto, WK and Leung, WK and Cheung, KS}, title = {Gut Microbiota Predicts Treatment Response to Empagliflozin Among MASLD Patients Without Diabetes Mellitus.}, journal = {Liver international : official journal of the International Association for the Study of the Liver}, volume = {45}, number = {3}, pages = {e70023}, pmid = {39950834}, issn = {1478-3231}, support = {//General Research Fund, Research Grant Council, The Government of the Hong Kong Special Administrative Region/ ; }, mesh = {Humans ; Male ; *Gastrointestinal Microbiome ; Middle Aged ; Female ; *Glucosides/therapeutic use ; *Benzhydryl Compounds/therapeutic use ; Prospective Studies ; *Sodium-Glucose Transporter 2 Inhibitors/therapeutic use ; Feces/microbiology ; Treatment Outcome ; Magnetic Resonance Imaging ; *Non-alcoholic Fatty Liver Disease/drug therapy/microbiology/diagnostic imaging ; Logistic Models ; Aged ; }, abstract = {BACKGROUND AND AIM: We aimed to investigate whether gut microbiota could predict the treatment response to pharmacological agents among metabolic dysfunction-associated steatotic liver disease (MASLD) patients without diabetes mellitus (DM), as data are lacking.<br><br>METHODS: We prospectively followed up non-diabetic MASLD patients who used empagliflozin. Clinical, anthropometric, laboratory assessments and magnetic resonance imaging-proton density fat fraction (MRI-PDFF) were performed from baseline to week 52 (EOT). Baseline stool samples were collected, and shotgun DNA metagenomic sequencing was performed to profile microbiome. The primary outcome was treatment response to empagliflozin at EOT, defined as MRI-PDFF decline &#x2265;&#x2009;30% at EOT from baseline. Linear discriminant analysis [LDA] effect size was used to identify putative bacterial species. Multivariable logistic regression was used to derive adjusted odds ratio (aOR) of outcome with bacterial species by adjusting for clinical factors.<br><br>RESULTS: Twenty-two (48.9%) of 45 patients (median age: 56.9&#x2009;years [IQR: 51.0-63.2]; male: 23 [51.1%]) achieved treatment response at EOT. There was difference in alpha diversity (Shannon index: p&#x2009;<&#x2009;0.001; Simpson index: p&#x2009;=&#x2009;0.001) and beta diversity (p&#x2009;=&#x2009;0.048) in baseline microbiome between treatment response and non-response groups. Faecalibacterium prausnitzii (log10LDAscore&#x2009;=&#x2009;4.27), Lachnospira pectinoschiza (log10LDAscore&#x2009;=&#x2009;3.99), Anaerostipes hadrus (log10LDAscore&#x2009;=&#x2009;3.98), Roseburia faecis (log10LDAscore&#x2009;=&#x2009;3.97), Roseburia inulinivorans (log10LDAscore&#x2009;=&#x2009;3.58) and Agathobaculum butyriciproducens (log10LDAscore&#x2009;=&#x2009;2.77) were enriched in the treatment response group. L. pectinoschiza (aOR: 34.1; p&#x2009;=&#x2009;0.015), A. hadrus (aOR:35.0; p&#x2009;=&#x2009;0.032) and A. butyriciproducens (aOR:22.3; p&#x2009;=&#x2009;0.023) independently predicted treatment response but not clinical factors. These three species collectively predicted treatment response with AUROC of 0.89 (95% CI: 0.80-0.99).<br><br>CONCLUSIONS: Certain gut bacterial species, particularly the combination of A. hadrus, L. pectinoschiza and A. butyriciproducens, may predict treatment response to empagliflozin in MAFLD patients without DM.}, }
@article {pmid39950813, year = {2025}, author = {Seguel Suazo, K and Nierychlo, M and Kondrotaite, Z and Petriglieri, F and Peces, M and Singleton, C and Dries, J and Nielsen, PH}, title = {Diversity and abundance of filamentous and non-filamentous "Leptothrix" in global wastewater treatment plants.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {3}, pages = {e0148524}, pmid = {39950813}, issn = {1098-5336}, support = {13351//Villum Fonden (Villum Foundation)/ ; }, mesh = {*Wastewater/microbiology ; Phylogeny ; RNA, Ribosomal, 16S/genetics/analysis ; *Biodiversity ; Sewage/microbiology ; }, abstract = {Species belonging to the genus Leptothrix are widely distributed in the environment and in activated sludge (AS) wastewater treatment plants (WWTPs). They are commonly found in iron-rich environments and reported to cause filamentous bulking in WWTPs. In this study, the diversity, distribution, and metabolic potential of the most prevalent Leptothrix spp. found in AS worldwide were studied. Our 16S rRNA amplicon survey showed that Leptothrix belongs to the general core community of AS worldwide, comprising 32 species with four species being most commonly found. Their taxonomic classification was re-evaluated based on both 16S rRNA gene and genome-based phylogenetic analysis showing that three of the most abundant "Leptothrix" species represented species in three other genera, Rubrivivax, Ideonella, and the novel genus, Ca. Intricatilinea. New fluorescence in situ hybridization (FISH) probes revealed rod-shaped morphology for the novel Ca. Rubrivivax defluviihabitans and Ca. Ideonella esbjergensis, while filamentous morphology was found only for Ca. Intricatilinea gracilis. Analysis of high-quality metagenome-assembled genomes revealed metabolic potential for aerobic growth, fermentation, storage of intracellular polymers, partial denitrification, photosynthesis, and iron reduction. FISH in combination with Raman microspectroscopy confirmed the in situ presence of chlorophyll and carotenoids in Ca. Rubrivivax defluviihabitans and Ca. Intricatilinea gracilis. This study resolves the taxonomy of abundant but poorly classified "Leptothrix" species, providing important insights into their diversity, morphology, and function in global AS wastewater treatment systems.IMPORTANCEThe genus Leptothrix has been extensively studied and described since the 1880s, with six species currently described but with the majority uncultured and undescribed. Some species are assumed to have a filamentous morphology and can cause settling problems in wastewater treatment plants (WWTPs). Here, we revised the classification of the most abundant Leptothrix spp. present in WWTPs across the world, showing that most belong to other genera, such as Rubrivivax and Ideonella. Furthermore, most do not have a filamentous morphology and are not problematic in WWTPs as previously believed. Metabolic reconstruction, including some traits validated in situ by the application of new fluorescence in situ hybridization probes and Raman microspectroscopy, provided additional insights into their metabolism. The study has contributed to a better understanding of the diversity, morphology, and function of "Leptothrix," which belong to the abundant core community across global activated sludge WWTPs.}, }
@article {pmid39950811, year = {2025}, author = {Kwon, J and Tanner, W and Kong, Y and Wade, M and Bitler, C and Chiavegato, MB and Pettigrew, MM}, title = {Prospective comparison of the digestive tract resistome and microbiota in cattle raised in grass-fed versus grain-fed production systems.}, journal = {mSphere}, volume = {10}, number = {3}, pages = {e0073824}, pmid = {39950811}, issn = {2379-5042}, support = {20-006612//Greenacres Foundation/ ; }, mesh = {Animals ; Cattle/microbiology ; *Animal Feed/analysis ; *Gastrointestinal Microbiome ; *Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Feces/microbiology ; Anti-Bacterial Agents/pharmacology ; Prospective Studies ; Edible Grain ; *Diet/veterinary ; *Poaceae ; Animal Husbandry/methods ; *Drug Resistance, Bacterial ; *Gastrointestinal Tract/microbiology ; Metagenomics ; }, abstract = {Most antimicrobials sold in the United States are used in food animals. Farm management practices contribute to antibacterial resistance (AR). Controversially, grass-fed diets have been recommended over grain-fed diets to reduce AR in beef cattle. Ionophore feed additives (non-therapeutic antibiotics that enhance feed efficiency) may contribute to AR development. We used shotgun metagenomic sequencing of fecal swabs to prospectively compare the cattle gastrointestinal resistome and microbiota in two different production systems over five periods from pre-weaning to pre-harvest. Cattle were grass-fed and pasture-raised (system A, n = 33) or grain-fed with ionophore additives in feedlots (system B, n = 34). System A cattle averaged 639 lb and 22.8 months of age, and system B cattle averaged 1,173 lb and 12.4 months of age preharvest. In total, 367 antibiotic resistance genes (ARGs) and 329 bacterial species were identified. The resistome of system A cattle had higher alpha diversity than system B cattle over their lifespan (P = 0.008). Beta-diversity estimates indicated overlap in the pre-weaning resistome and microbiota in both systems, which diverged post-weaning, with increases in several medically important ARGs when system B cattle transitioned to a grain diet. Analysis of compositions of microbiomes with bias correction indicated that levels of tetracycline, macrolide, aminoglycoside, beta-lactam, and bacitracin ARGs were significantly higher in system B cattle pre-harvest. Resistome changes were highly correlated with bacterial community changes (Procrustes, M[2] = 0.958; P = 0.001). Potentially modifiable farm management strategies, including diet and ionophores, may influence abundance and diversity of ARGs in fecal samples from cattle.IMPORTANCEAntibiotic resistance is a One Health threat. More antibiotics are used in agriculture than in human medicine. We compared the relative abundance of antibiotic resistance genes (ARGs) and bacterial species in cattle raised in two different cattle production systems (grass- and grain-fed). Fecal swab samples were collected at five time points spanning pre-weaning and prior to harvest. The antibiotic resistance gene and bacterial communities were relatively similar in the pre-weaning period when cattle in both systems were milking and on pasture. Resistance genes and bacterial communities diverged post-weaning when system B cattle were given a grain diet with feed additives for growth promotion containing non-medically important antibiotics (i.e., ionophores). The levels of medically important ARGs (e.g., macrolides) increased in system B grain-fed cattle post-weaning and were higher than in system A just prior to slaughter. These data provide additional evidence that farm management strategies impact the level of antibiotic resistance.}, }
@article {pmid39948426, year = {2025}, author = {Zang, T and Zhang, Z and Liu, W and Yin, L and Zhao, S and Liu, B and Ma, L and Li, Z and Tang, X}, title = {Structural and functional changes in the oral microbiome of patients with craniofacial microsomia.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {5400}, pmid = {39948426}, issn = {2045-2322}, support = {2021-I2M-1-068//Chinese Academy of Medical Science Innovation Fund for Medical Sciences/ ; }, mesh = {Humans ; *Microbiota/genetics ; Female ; Male ; Dysbiosis/microbiology ; *Mouth/microbiology ; Child ; RNA, Ribosomal, 16S/genetics ; Saliva/microbiology ; Metagenomics/methods ; Adolescent ; Adult ; Bacteria/genetics/classification ; Child, Preschool ; Young Adult ; *Craniofacial Abnormalities/microbiology ; }, abstract = {Craniofacial microsomia (CFM) is the second most common congenital craniofacial deformity, presenting diverse clinical manifestations and treatments that may influence oral bacteria dysbiosis (OBD). However, research linking CFM to OBD is limited. Saliva samples were collected from 20 patients with CFM and 24 controls. We compared oral microflora and gene function using 16 S ribosomal RNA sequencing and metagenomics. We also evaluated the correlation between CFM clinical phenotypes and microbiota community structure. Patients with CFM demonstrated greater richness and evenness in their oral microflora. The dominant genera included several pathogenic species, such as Actinomyces, Fusobacterium, and Prevotella. Notably, the severity of CFM correlated positively with the abundance of Neisseria and Porphyromonas. Upregulated pathways were primarily linked to biotin and amino acid metabolism, such as Tryptophan metabolism and Lysine degradation, and further underscored the need for focused oral health interventions in this population. This study is the first to indicate that CFM patients exhibit unique oral bacterial dysbiosis, marked by a higher presence of opportunistic pathogens and increased pathways related to oral and systemic health. These findings highlight the importance of monitoring oral health in patients with CFM.}, }
@article {pmid39947314, year = {2025}, author = {Zhang, X and Chen, Y and Xia, Y and Lin, S and Zhou, X and Pang, X and Yu, J and Sun, L}, title = {Oral microbiota in colorectal cancer: Unraveling mechanisms and application potential.}, journal = {Life sciences}, volume = {365}, number = {}, pages = {123462}, doi = {10.1016/j.lfs.2025.123462}, pmid = {39947314}, issn = {1879-0631}, mesh = {Humans ; *Colorectal Neoplasms/microbiology/pathology ; *Microbiota ; *Mouth/microbiology ; Fusobacterium nucleatum ; Porphyromonas gingivalis ; Animals ; Biomarkers, Tumor ; }, abstract = {Colorectal cancer (CRC), with a rising prevalence, is the third most commonly diagnosed cancer and the third leading cause of cancer-related death. Studies have shown that a complex interplay between the development of CRC and alterations in the oral microbiome. Recent advancements in genomics and metagenomics have highlighted the significant roles of certain oral microbes, particularly Porphyromonas gingivalis (P. gingivalis) and Fusobacterium nucleatum (F. nucleatum), in the progression of CRC. However, the detailed mechanisms by which the oral microbiota influence CRC development remain unclear. This review aims to elucidate the role of oral microbiota in CRC progression, evaluate their potential as biomarkers, and explore therapeutic strategies targeting these microbes. This review offers insights into the mechanisms underlying the interaction between oral microbiota and CRC, underscoring the potential of oral microbes as diagnostic and prognostic biomarkers, as well as therapeutic targets. Future research should focus on clarifying the exact pathways and developing innovative therapeutic strategies to enhance the diagnosis and treatment.}, }
@article {pmid39947184, year = {2025}, author = {Heinken, A and Hulshof, TO and Nap, B and Martinelli, F and Basile, A and O'Brolchain, A and O'Sullivan, NF and Gallagher, C and Magee, E and McDonagh, F and Lalor, I and Bergin, M and Evans, P and Daly, R and Farrell, R and Delaney, RM and Hill, S and McAuliffe, SR and Kilgannon, T and Fleming, RMT and Thinnes, CC and Thiele, I}, title = {A genome-scale metabolic reconstruction resource of 247,092 diverse human microbes spanning multiple continents, age groups, and body sites.}, journal = {Cell systems}, volume = {16}, number = {2}, pages = {101196}, doi = {10.1016/j.cels.2025.101196}, pmid = {39947184}, issn = {2405-4720}, support = {U19 AG063744/AG/NIA NIH HHS/United States ; }, mesh = {Humans ; *Microbiota/genetics ; Metagenomics/methods ; Metabolic Networks and Pathways/genetics ; Metagenome/genetics ; Genome, Bacterial ; Machine Learning ; }, abstract = {Genome-scale modeling of microbiome metabolism enables the simulation of diet-host-microbiome-disease interactions. However, current genome-scale reconstruction resources are limited in scope by computational challenges. We developed an optimized and highly parallelized reconstruction and analysis pipeline to build a resource of 247,092 microbial genome-scale metabolic reconstructions, deemed APOLLO. APOLLO spans 19 phyla, contains >60% of uncharacterized strains, and accounts for strains from 34 countries, all age groups, and multiple body sites. Using machine learning, we predicted with high accuracy the taxonomic assignment of strains based on the computed metabolic features. We then built 14,451 metagenomic sample-specific microbiome community models to systematically interrogate their community-level metabolic capabilities. We show that sample-specific metabolic pathways accurately stratify microbiomes by body site, age, and disease state. APOLLO is freely available, enables the systematic interrogation of the metabolic capabilities of largely still uncultured and unclassified species, and provides unprecedented opportunities for systems-level modeling of personalized host-microbiome co-metabolism.}, }
@article {pmid39947133, year = {2025}, author = {Elmassry, MM and Sugihara, K and Chankhamjon, P and Kim, Y and Camacho, FR and Wang, S and Sugimoto, Y and Chatterjee, S and Chen, LA and Kamada, N and Donia, MS}, title = {A meta-analysis of the gut microbiome in inflammatory bowel disease patients identifies disease-associated small molecules.}, journal = {Cell host &amp; microbe}, volume = {33}, number = {2}, pages = {218-234.e12}, doi = {10.1016/j.chom.2025.01.002}, pmid = {39947133}, issn = {1934-6069}, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; Animals ; Mice ; *Inflammatory Bowel Diseases/microbiology ; Feces/microbiology/chemistry ; Crohn Disease/microbiology ; Disease Models, Animal ; Multigene Family ; Fatty Acids/metabolism/chemistry ; Metagenomics ; Clostridium/genetics/metabolism ; }, abstract = {Gut microbiome changes have been associated with several human diseases, but the molecular and functional details underlying these associations remain largely unknown. Here, we performed a meta-analysis of small molecule biosynthetic gene clusters (BGCs) in metagenomic samples of the gut microbiome from inflammatory bowel disease (IBD) patients and matched healthy subjects and identified two Clostridia-derived BGCs that are significantly associated with Crohn's disease (CD), a main IBD type. Using synthetic biology, we discovered and solved the structures of six fatty acid amides as the products of the CD-enriched BGCs, which we subsequently detected in fecal samples from IBD patients. Finally, we show that the discovered molecules disrupt gut permeability and exacerbate disease in chemically or genetically susceptible mouse models of colitis. These findings suggest that microbiome-derived small molecules may play a role in the etiology of IBD and represent a generalizable approach for discovering molecular mediators of disease-relevant microbiome-host interactions.}, }
@article {pmid39946886, year = {2025}, author = {Shi, J and Zhang, Q and Sun, Y and Peng, Y and Wang, J and Wang, X}, title = {Microplastic induces microbial nitrogen limitation further alters microbial nitrogentransformation: Insights from metagenomic analysis.}, journal = {The Science of the total environment}, volume = {967}, number = {}, pages = {178825}, doi = {10.1016/j.scitotenv.2025.178825}, pmid = {39946886}, issn = {1879-1026}, mesh = {*Soil Microbiology ; *Nitrogen/metabolism ; *Microplastics/toxicity ; Metagenomics ; *Soil Pollutants ; Bacteria/metabolism ; *Nitrogen Cycle ; Soil/chemistry ; Microbiota ; RNA, Ribosomal, 16S ; Biodegradation, Environmental ; }, abstract = {Microplastic has a significant impact on soil microbial communities, which play crucial roles in soil nitrogen (N) cycles. However, there is a limited understanding of their influences on genes associated with the entire N cycling pathways. Through a 120-day soil incubation using conventional (PE and PET) and biodegradable microplastics (PLA and PBAT), coupled with 16S rRNA and metagenomic sequencing, we investigated the responses of N-cycling genes to microplastics in two contrasting soils (i.e. black soil and loess soil). We found that biodegradable microplastics strongly altered microbial N functional profiles, and enhanced the abundance of numerous key genes involved in N fixation, organic N mineralization, N reduction, and denitrification. Furthermore, biodegradable microplastics significantly decreased net N mineralization (Nm) compared to control and conventional microplastic treatments, suggesting microbial N immobilization outweighed N mineralization. Analysis of the function-taxon bipartite network showed that the Nm was well predicted for the abundances and diversity of bacteria within specific modules, with Nm decreasing, the abundances of specific taxa in a given network modules increasing. These results indicated that biodegradable microplastics act as a carbon source to select specific taxa involved in enhancing N bioavailability (e.g., N fixation and organic N mineralization) to meet microbial N demand, which in turn filtered the bacterial community (decreased diversity but increased abundances) and gradually formed specific function-taxon modules. Comparing the two soils, microbes in the less fertile alkaline loess soil were more sensitive to biodegradable microplastics than those in the nutrient-rich acid black soil. Our study indicated that increasing usage of biodegradable plastics in the future may lead to accelerated soil microbial N limitation and transformation.}, }
@article {pmid39946873, year = {2025}, author = {Feng, Y and Li, L and Ma, Q and Liu, S and Wang, P and Li, X and Ma, J}, title = {Effect of microcystin-LR on intestinal microbiota, metabolism, and health of zebrafish (Danio rerio).}, journal = {The Science of the total environment}, volume = {967}, number = {}, pages = {178838}, doi = {10.1016/j.scitotenv.2025.178838}, pmid = {39946873}, issn = {1879-1026}, mesh = {Animals ; *Microcystins/toxicity ; *Zebrafish/microbiology/physiology ; *Gastrointestinal Microbiome/drug effects ; Marine Toxins/toxicity ; Male ; *Water Pollutants, Chemical/toxicity ; Metabolome/drug effects ; }, abstract = {Microcystin-LR (MC-LR) is typically produced along with the occurrence of cyanobacterial blooms, potentially exerting deleterious effects on intestinal microbiota and health in aquatic animals. To date, the underlying mechanism by which MC-LR affects intestinal health remains elusive. In this study, adult male zebrafish were exposed to MC-LR to assess its impact on the microbiome and metabolome. Histopathological and biochemical results indicated that MC-LR damaged intestinal villi and epithelial cells, induced intestinal barrier injury and inflammatory response. Metabolomics results revealed that MC-LR induced amino acid, carbohydrate, lipid, energy metabolisms dysbiosis, and specifically promoted glycine, serine and threonine metabolism. Metagenomics results demonstrated that MC-LR altered the composition of intestinal microbiota, and microbial function prediction suggested that MC-LR promoted the functions associated with amino acid, lipid, carbohydrate and energy metabolisms. Multiomics and Metorigin analyses jointly confirmed that glycine, serine and threonine metabolism was predominantly regulated by dominant Proteobacteria, Firmicutes, Fusobacteriota and Bacteroidota under MC-LR stress. This study offers a comprehensive perspective on the toxicity of microbiota and microbiota-derived metabolism in fish intestines induced by MC-LR and deepens our comprehension of the disruptive influence of MC-LR on intestinal homeostasis in organisms.}, }
@article {pmid39946816, year = {2025}, author = {Laredo-Tiscareño, SV and Garza-Hernandez, JA and Tangudu, CS and Dankaona, W and Rodríguez-Alarcón, CA and Gonzalez-Peña, R and Adame-Gallegos, JR and Beristain-Ruiz, DM and Barajas-López, IN and Hargett, AM and Munderloh, UG and Blitvich, BJ}, title = {Detection of multiple novel viruses in argasid and ixodid ticks in Mexico.}, journal = {Ticks and tick-borne diseases}, volume = {16}, number = {2}, pages = {102455}, doi = {10.1016/j.ttbdis.2025.102455}, pmid = {39946816}, issn = {1877-9603}, mesh = {Animals ; Mexico ; *Argasidae/virology ; *Ixodidae/virology ; *Virome ; *Viruses/isolation &amp; purification/classification/genetics ; }, abstract = {We examined ticks from Mexico using viral metagenomics to increase our understanding of the composition and diversity of the tick virome. The analysis was performed using 3,127 ticks of four Ixodidae spp. and one Argasidae spp. collected in 2019 to 2021 from domestic animals in four states of Mexico (Chiapas, Chihuahua, Guerrero, and Michoacán). All ticks were homogenized and tested for viruses using two approaches. In the first approach, an aliquot of each homogenate underwent two blind passages in Ixodes scapularis (ISE6) cells. Supernatants from all second passage cultures were subjected to polyethylene glycol (PEG) precipitation to enrich for virions then RNAs were extracted from the precipitates and analyzed by unbiased high-throughput sequencing (UHTS). In the second approach, an aliquot of every homogenate was subjected to PEG precipitation then RNAs were extracted and analyzed by UHTS, allowing for the detection of viruses unable to replicate in ISE6 cells. We identified seven novel species of viruses from multiple taxonomic groups (Bunyavirales, Flaviviridae, Nodaviridae, Nyamivirdae, Rhabdoviridae, Solemoviridae, and Totiviridae), some of which are highly divergent from all classified viruses and cannot be assigned to any established genus. Twelve recognized species of viruses were also identified. In summary, multiple novel and recognized viruses were detected in ticks from Mexico, highlighting the remarkable diversity of the tick virome.}, }
@article {pmid39946339, year = {2025}, author = {Long, C and Wang, P and Wu, J and Liu, J and Tan, Z and Li, W}, title = {Structure and diversity of intestinal methanogens in black carp (Mylopharyngodon piceus), grass carp (Ctenopharyngodon idella) and water samples.}, journal = {PloS one}, volume = {20}, number = {2}, pages = {e0316456}, pmid = {39946339}, issn = {1932-6203}, mesh = {Animals ; *Carps/microbiology ; *Gastrointestinal Microbiome ; *Methane/metabolism ; *Water Microbiology ; Phylogeny ; Bacteria/genetics/classification ; }, abstract = {The present research investigation aims to examine the community features of methanogens in the intestinal tract of black and grass carp, as well as their association with methanogens in water samples. Samples of black carp, grass carp and water in a pond were gathered in Spring 2021. Using the Illumina HiSeq 2500 high-throughput sequencing platform, the metagenomic mcrA gene sequences of black carp, grass carp and cultured water specimens were determined and analyzed. The outcomes indicate that the richness and diversity of methanogens in the intestinal tract of black and carp grass carp were highly correlated with the cultured water. Five bacterial genera were found in the three sets of samples, Methanosarcina, Methanocorpusculum, Methanospirillum, Methanobacterium and Methanofollis, in which Methanosarcina and Methanocorpusculum were the dominant genera. In addition, Methanosarcina had the greatest amount in grass carp and Methanocorpusculum had the greatest quantity in black carp. In conclusion, Methanosarcina and Methanocorpusculum were the main methanogens in the digestive tract of black and grass carp and culture water, and hydrolytic fermentative bacteria were its main metabolic substrate, hydrotrophic was its main metabolic pathway. The results will provide a reference for the relationship between intestinal methanogens and aquaculture and the greenhouse effect.}, }
@article {pmid39945545, year = {2025}, author = {Verster, AJ and Salerno, P and Valls, R and Barrack, K and Price, CE and McClure, EA and Madan, JC and O'Toole, GA and Sanville, JL and Ross, BD}, title = {Persistent delay in maturation of the developing gut microbiota in infants with cystic fibrosis.}, journal = {mBio}, volume = {16}, number = {3}, pages = {e0342024}, pmid = {39945545}, issn = {2150-7511}, support = {ROSS20R3, OTOOLE19GO, MADAN18GO, MADAN18AO, 00389A122MADAN, STANTO19R0//Cystic Fibrosis Foundation (CFF)/ ; UH3 OD023275/OD/NIH HHS/United States ; P30-DK117469, T32-AI007363, T32-HL134598, UH3OD023275, R35GM142685//HHS | National Institutes of Health (NIH)/ ; P30 DK117469/DK/NIDDK NIH HHS/United States ; R35 GM142685/GM/NIGMS NIH HHS/United States ; T32 HL134598/HL/NHLBI NIH HHS/United States ; T32 AI007363/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Cystic Fibrosis/microbiology ; *Gastrointestinal Microbiome ; Infant ; Feces/microbiology ; Infant, Newborn ; Child, Preschool ; Metagenomics ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Female ; Longitudinal Studies ; Anti-Bacterial Agents/therapeutic use ; }, abstract = {The healthy human infant gut microbiome undergoes stereotypical changes in taxonomic composition between birth and maturation to an adult-like stable state. During this time, extensive communication between microbiota and the host immune system contributes to health status later in life. Although there are many reported associations between microbiota compositional alterations and disease in adults, less is known about how microbiome development is altered in pediatric diseases. One pediatric disease linked to altered gut microbiota composition is cystic fibrosis (CF), a multi-organ genetic disease involving impaired chloride secretion across epithelia and heightened inflammation both in the gut and at other body sites. Here, we use shotgun metagenomics to profile the strain-level composition and developmental dynamics of the infant fecal microbiota from several CF and non-CF longitudinal cohorts spanning from birth to greater than 36 months of life. We identify a set of keystone species that define microbiota development in early life in non-CF infants but are missing or decreased in relative abundance in infants with CF, resulting in a delayed pattern of microbiota maturation, persistent entrenchment in a transitional developmental phase, and subsequent failure to attain an adult-like stable microbiota. Delayed maturation is strongly associated with cumulative antibiotic treatments, and we also detect the increased relative abundance of oral-derived bacteria and higher levels of fungi in infants with CF, features that are associated with decreased gut bacterial density. These findings suggest the potential for future directed therapies targeted at overcoming developmental delays in microbiota maturation for infants with CF.IMPORTANCEThe human gastrointestinal tract harbors a diversity of microbes that colonize upon birth and collectively contribute to host health throughout life. Infants with the disease cystic fibrosis (CF) harbor altered gut microbiota compared to non-CF counterparts, with lower levels of beneficial bacteria. How this altered population is established in infants with CF and how it develops over the first years of life is not well understood. By leveraging multiple large non-CF infant fecal metagenomic data sets and samples from a CF cohort collected prior to highly effective modulator therapy, we define microbiome maturation in infants up to 3 years of age. Our findings identify conserved age-diagnostic species in the non-CF infant microbiome that are diminished in abundance in CF counterparts that instead exhibit an enrichment of oral-derived bacteria and fungi associated with antibiotic exposure. Together, our study builds toward microbiota-targeted therapy to restore healthy microbiota dynamics in infants with CF.}, }
@article {pmid39945541, year = {2025}, author = {Lapid, R and Motro, Y and Craddock, H and Salah, I and King, R and Winner, K and Kahila Bar-Gal, G and Moran-Gilad, J}, title = {Abundance of clinically relevant antimicrobial resistance genes in the golden jackal (Canis aureus) gut.}, journal = {mSphere}, volume = {10}, number = {3}, pages = {e0081924}, pmid = {39945541}, issn = {2379-5042}, mesh = {Animals ; Feces/microbiology ; *Drug Resistance, Bacterial/genetics ; *Gastrointestinal Microbiome/genetics ; Anti-Bacterial Agents/pharmacology ; *Bacteria/genetics/drug effects/classification ; Israel ; *Genes, Bacterial ; Metagenomics ; beta-Lactamases/genetics ; Humans ; }, abstract = {UNLABELLED: The spread of antimicrobial resistance (AMR) is a critical One Health issue. Wildlife could act as reservoirs or vehicles of AMR bacteria (ARBs) and AMR genes (ARGs) but are relatively understudied. We sought to investigate clinically relevant ARGs in golden jackals (Canis aureus) thriving near human settlements in Israel. Fecal samples were collected from 111 jackals across four regions over a 10-month period. Various animal and spatio-temporal metadata were collected. Samples were analyzed by quantitative PCR (qPCR) for beta-lactamases (blaTEM, blaCTX-M15, and blaSHV), qnrS and int1. A subset of samples was subject to shotgun metagenomic sequencing followed by resistome and microbiome analyses. qPCR detected a high prevalence of ARGs, including beta-lactamases (blaTEM-1, 96.4%; blaCTX-M-15, 51.4%, blaSHV, 15.3%), fluoroquinolone resistance (qnrS, 87.4%), and class 1 integrons (Int1, 94.6%). The blaTEM-1 gene was found to be more prevalent in adult jackals compared to younger ones. Metagenomic analysis of a subset of samples revealed a diverse gut microbiome harboring a rich resistome with tetracycline resistance genes being the most prevalent. Metagenome-assembled genome analysis further identified several ARGs associated with clinically relevant bacteria. These findings highlight the potential role of golden jackals as reservoirs for AMR and emphasize the need for ongoing surveillance to better understand AMR transmission dynamics at the wildlife-human interface.<br><br>IMPORTANCE: The research highlights the potential role of the golden jackals as reservoirs for antimicrobial resistance (AMR). The high prevalence of clinically relevant AMR genes in these jackals emphasizes the need for ongoing surveillance and monitoring to better understand AMR transmission dynamics at the wildlife-human interface.}, }
@article {pmid39944722, year = {2025}, author = {Saravanan, C and Gopinath, NK and Ganesan, R and Thirumurugan, D}, title = {Challenges and limitations in using bacterial metabolites as immunomodulators.}, journal = {Frontiers in cellular and infection microbiology}, volume = {15}, number = {}, pages = {1535394}, pmid = {39944722}, issn = {2235-2988}, mesh = {Humans ; *Bacteria/metabolism ; Gastrointestinal Microbiome ; *Immunologic Factors/pharmacology/therapeutic use/metabolism ; Animals ; Metabolomics ; Metagenomics ; Immunomodulation ; }, abstract = {Harnessing the immunomodulatory potential of bacterial metabolites opens up exciting possibilities for treating various immune-related disorders. However, turning this potential into a reality presents significant challenges. This review investigates these challenges, focusing on discovery, production, characterization, stability, formulation, safety, and individual variability limitations. The limited bioavailability of many metabolites, as well as potential improvements along with the potential for off-target effects and the importance of precise targeting, are emphasized. Furthermore, the complex interactions between gut bacterial metabolites and the microbiome are investigated, highlighting the importance of personalized approaches. We conclude by discussing promising advances in metagenomics, metabolomics, synthetic biology, and targeted delivery systems, which hold out hope for overcoming these limitations and paving the way for the clinical translation of bacterial metabolites as effective immunomodulators.}, }
@article {pmid39940425, year = {2025}, author = {Chen, E and Ajami, NJ and White, DL and Liu, Y and Gurwara, S and Hoffman, K and Graham, DY and El-Serag, HB and Petrosino, JF and Jiao, L}, title = {Dairy Consumption and the Colonic Mucosa-Associated Gut Microbiota in Humans-A Preliminary Investigation.}, journal = {Nutrients}, volume = {17}, number = {3}, pages = {}, pmid = {39940425}, issn = {2072-6643}, support = {K07 CA181480/CA/NCI NIH HHS/United States ; CX001430//U.S. Department of Veterans Affairs/ ; I01 CX001430/CX/CSRD VA/United States ; 001//Gillson Longenbaugh Foundation/ ; P30 DK056338/DK/NIDDK NIH HHS/United States ; RP#140767//Cancer Prevention and Research Institute of Texas/ ; P30 ES030285/ES/NIEHS NIH HHS/United States ; DK56338/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Cross-Sectional Studies ; Female ; Male ; Middle Aged ; *Dairy Products ; *Colon/microbiology ; *Intestinal Mucosa/microbiology ; Adult ; RNA, Ribosomal, 16S/genetics ; Cheese ; *Diet ; Animals ; Bacteria/classification/genetics ; Aged ; Yogurt ; }, abstract = {BACKGROUND: Dairy consumption has been associated with various health outcomes that may be mediated by changes in gut microbiota.<br><br>METHODS: This cross-sectional study investigated the association between the colonic mucosa-associated gut microbiota and the self-reported intake of total dairy, milk, cheese, and yogurt. A total of 97 colonic mucosal biopsies collected from 34 polyp-free individuals were analyzed. Dairy consumption in the past year was assessed using a food frequency questionnaire. The 16S rRNA gene V4 region was amplified and sequenced. Operational taxonomic unit (OTU) classification was performed using the UPARSE and SILVA databases. OTU diversity and relative abundance were compared between lower vs. higher dairy consumption groups. Multivariable negative binomial regression models for panel data were used to estimate the incidence rate ratio and 95% confidence interval for bacterial counts and dairy consumption. False discovery rate-adjusted p values (q value) < 0.05 indicated statistical significance.<br><br>RESULTS: Higher total dairy and milk consumption and lower cheese consumption were associated with higher alpha microbial diversity (adjusted p values < 0.05). Higher total dairy and milk consumption was also associated with higher relative abundance of Faecalibacterium. Higher milk consumption was associated with higher relative abundance of Akkermansia. Higher total dairy and cheese consumption was associated with lower relative abundance of Bacteroides.<br><br>CONCLUSIONS: Dairy consumption may influence host health by modulating the structure and composition of the colonic adherent gut microbiota.}, }
@article {pmid39940254, year = {2025}, author = {Barata, P and Oliveira, A and Soares, R and Fernandes, A}, title = {Gut Microbiota Is Not Significantly Altered by Radioiodine Therapy.}, journal = {Nutrients}, volume = {17}, number = {3}, pages = {}, pmid = {39940254}, issn = {2072-6643}, mesh = {Humans ; *Gastrointestinal Microbiome/radiation effects ; *Iodine Radioisotopes/therapeutic use/adverse effects ; Feces/microbiology ; Male ; Female ; Middle Aged ; Prospective Studies ; *Thyroid Neoplasms/radiotherapy/microbiology ; *Hyperthyroidism/radiotherapy/microbiology ; Adult ; Aged ; Bacteria/classification/radiation effects ; Radiopharmaceuticals/therapeutic use ; }, abstract = {Purpose: Radiotherapy treatments are known to alter the gut microbiota. However, little is known regarding the effect of nuclear medicine treatments on gut microbiota, and it is established that nuclear medicine is inherently different from radiotherapy. To address this knowledge gap, we conducted a prospective study to identify changes in the gut microbiota of patients treated with [[131]I]NaI by comparing fecal samples before and after RAIT. Methods: Fecal samples of 64 patients (37 with thyroid cancer and 27 with hyperthyroidism) with indication for RAIT were collected 2 to 3 days before treatment and 8 to 10 days post-treatment. After DNA extraction, the gut microbiota's richness, diversity, and composition were analyzed by shotgun metagenomics. In addition, LEfSe was performed to compare compositional changes in specific bacteria. Results: Gut microbiome richness and diversity remained unchanged after RAIT, with few changes in its composition identified, especially in patients with hyperthyroidism. Conclusions: This study provides a conceptual and analytical basis for increasing our understanding of the effects of radiopharmaceuticals on gut microbiota. Our preliminary results indicate that RAIT, contrary to radiotherapy, does not cause major disruptions to the human gut microbiota.}, }
@article {pmid39940045, year = {2025}, author = {Schropp, N and Bauer, A and Stanislas, V and Huang, KD and Lesker, TR and Bielecka, AA and Strowig, T and Michels, KB}, title = {The impact of regular sauerkraut consumption on the human gut microbiota: a crossover intervention trial.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {52}, pmid = {39940045}, issn = {2049-2618}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; *Bacteria/classification/genetics/isolation &amp; purification ; Cross-Over Studies ; Fatty Acids, Volatile/blood ; Feces/microbiology ; *Fermented Foods/microbiology ; *Gastrointestinal Microbiome ; Healthy Volunteers ; Metagenomics/methods ; Pasteurization ; }, abstract = {BACKGROUND: Sauerkraut is a fermented food that has been suspected to have a beneficial impact on the gut microbiome, but scientific evidence is sparse. In this crossover intervention trial with 87 participants (DRKS00027007), we investigated the impact of daily consumption of fresh or pasteurized sauerkraut for 4 weeks on gut microbial composition and the metabolome in a healthy study population.<br><br>RESULTS: Using shotgun metagenomic sequencing, we observed changes in single bacterial species following fresh and pasteurized sauerkraut consumption. More pronounced changes were observed in the pasteurized sauerkraut intervention arm. Only pasteurized sauerkraut consumption increased serum short-chain fatty acids (SCFAs).<br><br>CONCLUSIONS: The gut microbiome of healthy individuals is rather resilient to short-term dietary&#xa0;interventions even though single species might be affected by sauerkraut consumption. Video Abstract.}, }
@article {pmid39939365, year = {2025}, author = {Soares, KO and Da Rocha, TF and Hale, VL and Vasconcelos, PC and do Nascimento, LJ and da Silva, NMV and Rodrigues, AE and de Oliveira, CJB}, title = {Comparing the impact of landscape on the gut microbiome of Apis mellifera in Atlantic Forest and Caatinga Biomes.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {5293}, pmid = {39939365}, issn = {2045-2322}, support = {001//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior/ ; 88881.311776/2018-01//CAPES-PrInt Project "Omic sciences applied to the prevention of antimicrobial resistance at the human-animal-environment interface-a one health approach/ ; 3136678/2020-0//Conselho Nacional de Pesquisa e Desenvolvimento/ ; }, mesh = {Animals ; Bees/microbiology ; *Gastrointestinal Microbiome/genetics ; *Forests ; Brazil ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Ecosystem ; }, abstract = {The composition of the gut microbiota in animals can be influenced by a variety of intrinsic and extrinsic factors in the host, such as diet, physiological state, and genetics. This study aimed to compare the structural composition of the gut microbiota of Apis mellifera bees from two distinct Brazilian biomes, the Atlantic Forest and the Caatinga, using high throughput 16 S rRNA sequencing. We identified a core microbiota composed of seven genera present in all samples: Lactobacillus, Commensalibacter, Rhizobiaceae, Snodgrassella, Gilliamella, Orbaceae and Bifidobacterium. These taxa accounted for 63% of all bacterial genera in the dataset. Interestingly, we observed a significantly differential abundance of the genus Apibacter between bees from the two biomes, with a marked increase in bees from Atlantic Forest. However, the overall variance in the gut structural composition attributable to landscape type, while significant, was relatively low. Notably, none of the members of the core microbiota were differently abundant between the biomes. Understanding the magnitude of landscape-associated effects on the microbiota of bees in different biomes is crucial for the accurate assessment of the impact of anthropogenic factors. These findings provide important insights into the resilience and adaptability of the honey bee gut microbiome across contrasting environments, contributing to the development of conservation and sustainable management strategies for these essential pollinators.}, }
@article {pmid39938754, year = {2025}, author = {Fernandes, M and Palmieri, O and Castellana, S and Spanetta, M and Latiano, T and Lupo, C and De Masi, C and Cardile, C and Calvello, C and Izzi, F and Placidi, F and Mazza, T and Mercuri, NB and Latiano, A and Liguori, C}, title = {Gut microbiome composition changes in obstructive sleep apnoea syndrome also in relation to excessive daytime sleepiness.}, journal = {Brain research bulletin}, volume = {222}, number = {}, pages = {111251}, doi = {10.1016/j.brainresbull.2025.111251}, pmid = {39938754}, issn = {1873-2747}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Sleep Apnea, Obstructive/microbiology/physiopathology ; Male ; Female ; Middle Aged ; Adult ; Feces/microbiology ; Polysomnography ; *Disorders of Excessive Somnolence/microbiology ; Dysbiosis/microbiology ; }, abstract = {INTRODUCTION: Obstructive sleep apnoea syndrome (OSAS) is considered a risk factor for several comorbidities. Alteration in gut microbiome was documented in OSAS animal models and in paediatric patients. This study analysed gut microbiome composition in adult patients with OSAS compared to healthy controls. Further, the effect of excessive daytime sleepiness (EDS) on gut microbiome was evaluated.<br><br>METHODS: Adult patients with OSAS underwent polysomnographic recording and completed the Epworth Sleepiness Scale (ESS) to assess EDS. Faecal samples were collected and compared between patients and healthy controls. Composition, community diversity, differences in taxa abundance profiles and sample dysbiosis were evaluated through 16S metagenomics and multiple bioinformatics algorithms. OSAS patients were distributed in two groups according to EDS (ESS score&#x2265;10) to assess differences in clinical, polysomnographic and faecal data.<br><br>RESULTS: Twenty-three OSAS patients were compared to 44 healthy controls. Patients presented significant differences of gut microbiome biodiversity, specifically in qualitative alpha diversity metrics (Faith's PD Kruskal-Wallis test, p-value=0.003; Number_of_Observed_Features, p-value =0.001). OSAS patients tend to cluster together, at least for Jaccard and Unweighted UniFrac distance-based PERMANOVA tests (q-values=0.02 and =0.003, respectively). Several taxa were detected as different in abundance between OSAS patients and healthy controls, although, globally, OSAS patients cannot be considered as "dysbiotic". Differences in bacteria composition were evident between OSAS patients with and those without EDS.<br><br>CONCLUSIONS: OSAS is associated with gut microbiome alteration in adult patients. EDS in OSAS seems to characterize a different gut microbiome composition, although it can be only hypothesized a gut-mediated effect on EDS in OSAS.}, }
@article {pmid39938727, year = {2025}, author = {Braga, CM and da Silva, SP and Neto, JPN and Medeiros, DBA and Cruz, ACR and Nascimento, BLSD and Pinheiro, LRS and Martins, LC}, title = {Viral metagenomics of hematophagous insects collected in the Carajas mining complex, Pará State, Brazil.}, journal = {Acta tropica}, volume = {263}, number = {}, pages = {107551}, doi = {10.1016/j.actatropica.2025.107551}, pmid = {39938727}, issn = {1873-6254}, mesh = {Animals ; Brazil ; *Metagenomics ; Phylogeny ; *Culicidae/virology ; *Virome ; *Psychodidae/virology ; *Ceratopogonidae/virology ; Genome, Viral ; *Insect Viruses/genetics/classification/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; *Viruses/genetics/classification/isolation &amp; purification ; }, abstract = {Hematophagous insects are vectors of viruses that cause diseases in humans and animals worldwide. Mosquitoes (Culicidae), biting midges (Ceratopogonidae), and sandflies (Psychodidae) were collected in three municipalities (Marabá, Canaã dos Carajás, and Curionópolis) in the state of Pará, Brazil, in 2019. Morphological keys were used for the taxonomic identification of insect species. High-throughput sequencing and metagenomic analysis were employed to characterize the viromes of the hematophagous insects. We characterized the virome of 839 insects grouped into 14 pools. A total of 729 million paired reads were generated, with 12 million viral sequences (3 % of the reads). The families Reoviridae, Myoviridae, Retroviridae, and Poxviridae were found in all samples of this study. Phylogenies of RNA-dependent RNA polymerase (RdRp) from viruses of the families Chuviridae, Dicistroviridae, Flaviviridae, Iflaviridae, Mesoniviridae, Phenuiviridae, and Rhabdoviridae were performed. In this study, the first isolation of the Guaico Culex Virus (GCXV) in the northern region of Brazil was obtained from a pool of Culex (Melanoconion) spp. mosquitoes collected in Curionópolis. The data obtained in this study demonstrate that the Carajás region has an ecosystem rich in viruses. Additional studies are needed to understand the dynamics of viruses in vectors, vertebrates, and the human population in the region.}, }
@article {pmid39938449, year = {2025}, author = {Ye, L and Yao, Z and Xuan, Q and Liu, Q and Bo, T}, title = {The impact of sleeve gastrectomy on MASH development by regulating the composition of gut microbiota and metabolic homeostasis.}, journal = {Biochemical and biophysical research communications}, volume = {752}, number = {}, pages = {151466}, doi = {10.1016/j.bbrc.2025.151466}, pmid = {39938449}, issn = {1090-2104}, mesh = {*Gastrointestinal Microbiome ; Animals ; *Gastrectomy/methods ; *Homeostasis ; Mice ; Mice, Inbred C57BL ; Male ; *Non-alcoholic Fatty Liver Disease/microbiology/metabolism/surgery ; Disease Models, Animal ; Bariatric Surgery ; }, abstract = {The prevalence of metabolic dysfunction-associated steatohepatitis (MASH) is increasing annually, which is a global public health issue. Although clinical trials are lacking, observational studies indicate that bariatric surgery can alleviate the progression of MASH. Here, we performed sleeve gastrectomy (SG) and Sham surgery on 8-week-old mice, and then fed a AMLN diet for 24 weeks to construct a diet-inducted MASH mice model after 4-week post-surgery recovery. Applying a multi-omics approach combining metagenomics, metabolomics, and transcriptomics, we found that SG prevents the development of hepatic steatosis, inflammation, and fibrosis in MASH mice not only by significantly altering the structure of gut microbiota including s_Akkermansia muciniphila, s_Alistiples dispar, g_Helicobacter and s_uc_Oscillospiraceae, but also by modulating the levels of serum metabolites including l-arginine and taurocholic acid (TCA). These results suggest that SG and the alteration of gut microbiota and its related serum metabolites can be served as the effective therapeutic strategies for MASH.}, }
@article {pmid39938296, year = {2025}, author = {Tan, L and Liang, J and Qin, Z and Ning, T and Wei, X and Yang, B and Wang, Q and Xu, Y and Shen, F}, title = {Unveiling the sustained effects of plant root exudates on soil microbiome and resistome and the related functional traits.}, journal = {Journal of environmental management}, volume = {376}, number = {}, pages = {124485}, doi = {10.1016/j.jenvman.2025.124485}, pmid = {39938296}, issn = {1095-8630}, mesh = {*Soil Microbiology ; *Plant Roots ; Rhizosphere ; Soil/chemistry ; *Microbiota ; *Plant Exudates ; }, abstract = {Investigating the transmission mechanisms and influencing factors of antibiotic resistance genes (ARGs) in the soil-plant continuum is vital for mitigating ARG contamination and safeguarding plant and human health. Rhizosphere soil serves as a crucial interface for ARG propagation and transmission; however, it is unclear whether and how plant involved in regulating ARGs in their rhizosphere environment. Root exudates acting as vital links in the plant-soil-microbe interaction. Here, we examined the fluctuating patterns of the resistome and mobile genetic elements (MGEs) following exposure to four types of common root exudates: amino acids (AAs), sugars, long-chain organic acids (LCOAs), and short-chain organic acids (SCOAs). AAs exerted a rapid and pronounced effect, leading to a significant elevation in total ARG and MGE abundance by 3.18-fold and 21.06-fold, respectively, compared to the control group by day 7. Conversely, the impact of sugars manifested gradually over time. The influence of AAs and sugars persisted beyond 240 days post-treatment cessation. Importantly, the proliferation of ARGs was closely linked to the enrichment of plant growth-promoting bacteria (PGPBs) such as Pseudomonas, Cupriavidus, Azospirillum, Variovorax, and Ensifer. Functional analysis revealed that the potential features of ARGs and MGEs were associated with cell wall/membrane/envelope biogenesis, cell motility, and inorganic ion transport. This study offers novel insights into the factors influencing the dynamics of ARGs in the plant rhizosphere and may contribute to ecologically sustainable agricultural practices.}, }
@article {pmid39936903, year = {2025}, author = {Elena, AX and Orel, N and Fang, P and Herndl, GJ and Berendonk, TU and Tinta, T and Klümper, U}, title = {Jellyfish blooms-an overlooked hotspot and potential vector for the transmission of antimicrobial resistance in marine environments.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0101224}, pmid = {39936903}, issn = {2379-5077}, support = {01DO2200, 01KI2404A//Bundesministerium f&#xfc;r Bildung und Forschung (BMBF)/ ; 16GW0355//Bundesministerium f&#xfc;r Bildung und Forschung (BMBF)/ ; 202004910327//China Scholarship Council (CSC)/ ; 793778//H2020 Marie Sk&#x142;odowska-Curie Actions/ ; I04978//Austrian Science Fund (FWF)/ ; ARRS J7-2599, P1-0237//Javna Agencija za Raziskovalno Dejavnost RS (ARRS)/ ; Project ID: 57747282//DAAD/ ; Project ID: B|-DE/25-27-001//Public Agency for Scientific Research and Innovation of the Republic of Slovenia (ARIS)/ ; }, mesh = {Animals ; *Scyphozoa/microbiology/growth &amp; development ; Zooplankton/microbiology ; RNA, Ribosomal, 16S/genetics ; Bacteria/genetics/drug effects ; Microbiota/genetics ; Eutrophication ; Metagenome ; *Drug Resistance, Bacterial/genetics ; Seawater/microbiology ; *Drug Resistance, Microbial/genetics ; }, abstract = {Gelatinous zooplankton (GZ) represents an important component of marine food webs, capable of generating massive blooms with severe environmental impact. When these blooms collapse, considerable amounts of organic matter (GZ-OM) either sink to the seafloor or can be introduced into the ocean's interior, promoting bacterial growth and providing a colonizable surface for microbial interactions. We hypothesized that GZ-OM is an overlooked marine hotspot for transmitting antimicrobial resistance genes (ARGs). To test this, we first re-analyzed metagenomes from two previous studies that experimentally evolved marine microbial communities in the presence and absence of OM from Aurelia aurita and Mnemiopsis leidyi recovered from bloom events and thereafter performed additional time-resolved GZ-OM degradation experiments to improve sample size and statistical power of our analysis. We analyzed these communities for composition, ARG, and mobile genetic element (MGE) content. Communities exposed to GZ-OM displayed up to fourfold increased relative ARG and up to 10-fold increased MGE abundance per 16S rRNA gene copy compared to the controls. This pattern was consistent across ARG and MGE classes and independent of the GZ species, indicating that nutrient influx and colonizable surfaces drive these changes. Potential ARG carriers included genera containing potential pathogens raising concerns of ARG transfer to pathogenic strains. Vibrio was pinpointed as a key player associated with elevated ARGs and MGEs. Whole-genome sequencing of a Vibrio isolate revealed the genetic capability for ARG mobilization and transfer. This study establishes the first link between two emerging issues of marine coastal zones, jellyfish blooms and ARG spread, both likely increasing with future ocean change. Hence, jellyfish blooms are a quintessential "One Health" issue where decreasing environmental health directly impacts human health.IMPORTANCEJellyfish blooms are, in the context of human health, often seen as mainly problematic for oceanic bathing. Here we demonstrate that they may also play a critical role as marine environmental hotspots for the transmission of antimicrobial resistance (AMR). This study employed (re-)analyses of microcosm experiments to investigate how particulate organic matter introduced to the ocean from collapsed jellyfish blooms, specifically Aurelia aurita and Mnemiopsis leidyi, can significantly increase the presence of antimicrobial resistance genes and mobile genetic elements in marine microbial communities by up to one order of magnitude. By providing abundant nutrients and surfaces for bacterial colonization, organic matter from these blooms enhances ARG proliferation, including transfer to and mobility in potentially pathogenic bacteria like Vibrio. Understanding this connection highlights the importance of monitoring jellyfish blooms as part of marine health assessments and developing strategies to mitigate the spread of AMR in coastal ecosystems.}, }
@article {pmid39933522, year = {2025}, author = {Xu, CCY and Fugère, V and Barbosa da Costa, N and Beisner, BE and Bell, G and Cristescu, ME and Fussmann, GF and Gonzalez, A and Shapiro, BJ and Barrett, RDH}, title = {Pre-exposure to stress reduces loss of community and genetic diversity following severe environmental disturbance.}, journal = {Current biology : CB}, volume = {35}, number = {5}, pages = {1061-1073.e4}, doi = {10.1016/j.cub.2025.01.037}, pmid = {39933522}, issn = {1879-0445}, mesh = {*Genetic Variation ; *Stress, Physiological ; *Biodiversity ; Biological Evolution ; Bacteria/genetics ; Fresh Water/microbiology/chemistry ; }, abstract = {Environmental stress caused by anthropogenic impacts is increasing worldwide. Understanding the ecological and evolutionary consequences for biodiversity will be crucial for our ability to respond effectively. Historical exposure to environmental stress is expected to select for resistant species, shifting community composition toward more stress-tolerant taxa. Concurrent with this species sorting process, genotypes within resistant taxa that have the highest relative fitness under severe stress are expected to increase in frequency, leading to evolutionary adaptation. However, empirical demonstrations of these dual ecological and evolutionary processes in natural communities are rare. Here, we provide evidence for simultaneous species sorting and evolutionary adaptation across multiple species within a natural freshwater bacterial community. Using a two-phase stressor experimental design (acidification pre-exposure followed by severe acidification) in aquatic mesocosms, we show that pre-exposed communities were more resistant than naive communities to taxonomic loss when faced with severe acid stress. However, after sustained severe acidification, taxonomic richness of both pre-exposed and naive communities eventually converged. All communities experiencing severe acidification became dominated by an acidophilic bacterium, Acidiphilium rubrum, but this species retained greater genetic diversity and followed distinct evolutionary trajectories in pre-exposed relative to naive communities. These patterns were shared across other acidophilic species, providing repeated evidence for the impact of pre-exposure on evolutionary outcomes despite the convergence of community profiles. Our results underscore the need to consider both ecological and evolutionary processes to accurately predict the responses of natural communities to environmental change.}, }
@article {pmid39933221, year = {2025}, author = {Cao, Y and Fan, X and Zang, T and Li, Y and Tu, Y and Wei, Y and Bai, J and Liu, Y}, title = {Gut microbiota causes depressive phenotype by modulating glycerophospholipid and sphingolipid metabolism via the gut-brain axis.}, journal = {Psychiatry research}, volume = {346}, number = {}, pages = {116392}, doi = {10.1016/j.psychres.2025.116392}, pmid = {39933221}, issn = {1872-7123}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Sphingolipids/metabolism ; Mice ; *Glycerophospholipids/metabolism ; Female ; *Depression/metabolism/microbiology ; *Brain/metabolism ; Humans ; Pregnancy ; Phenotype ; Fecal Microbiota Transplantation ; Lipid Metabolism ; Disease Models, Animal ; }, abstract = {Emerging evidence suggests that changes in the gut microbiota (GM) are related to prenatal depression onset, but the underlying molecular mechanisms remain obscure. This study was conducted to explore how disordered GM is involved in the onset of prenatal depression through the microbiome-gut-brain (MGB) axis. We transplanted fecal microbiota from women with and without prenatal depression into germ-free mice. Fecal metagenomic sequencing and LC-MS untargeted metabolomics analysis were performed to identify the GM composition, function, and metabolites in mice. Lipid metabolomics analysis was then used to characterize the lipid metabolism of brain tissue in mice. We found that mice transplanted with fecal microbiota from women with prenatal depression exhibited depressive-like behaviors as well as characteristic disorders of the phylum Firmicutes. Weighted Gene Correlation Network Analysis identified three microbial and one metabolic module in the gut, alongside two lipid metabolic modules in the brain, as significantly related to all depressive-like behaviors. These modules were enriched for glycerophospholipid and sphingolipid metabolism. In addition, the GM of mice with depressive-like behaviors were enriched and deficient in relevant functions and enzymes in the glycerophospholipid (mainly phosphatidylethanolamine) and sphingolipid (mainly hexosyl-ceramide) metabolic pathways, respectively. Consistently, glycerophospholipid and sphingolipid metabolites in the brains of depressive-like mice were up- and down-regulated. Increased phosphatidylethanolamine and decreased hexosyl-ceramide were significantly related to differential genera in the gut. Collectively, our findings provide a novel microbial and metabolic framework for understanding the role of the MGB axis in prenatal depression, indicating that the GM may be involved in the onset of depressive phenotypes by modulating central glycerophospholipid and sphingolipid metabolic homeostasis.}, }
@article {pmid39932999, year = {2025}, author = {Tepekule, B and Barcik, W and Staiger, WI and Bergadà-Pijuan, J and Scheier, T and Brülisauer, L and Hall, AR and Günthard, HF and Hilty, M and Kouyos, RD and Brugger, SD}, title = {Computational and in vitro evaluation of probiotic treatments for nasal Staphylococcus aureus decolonization.}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {122}, number = {7}, pages = {e2412742122}, pmid = {39932999}, issn = {1091-6490}, support = {1449 M//Promedica Stiftung/ ; GRS-09420//Gebert R&#xfc;f Stiftung (Gebert R&#xfc;f Foundation)/ ; BSSGI0_155851//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (SNF)/ ; K-84804 - 01 - 01//UZH | Foundation for Research in Science and the Humanities (Stiftung f&#xfc;r wissenschaftliche Forschung)/ ; }, mesh = {*Probiotics/pharmacology/therapeutic use ; *Staphylococcus aureus/drug effects/genetics ; Humans ; Microbiota/drug effects ; *Staphylococcal Infections/microbiology/drug therapy ; Anti-Bacterial Agents/pharmacology/therapeutic use ; *Nose/microbiology ; RNA, Ribosomal, 16S/genetics ; Adult ; Computer Simulation ; }, abstract = {Despite the rising challenge of antibiotic resistance, current approaches to eradicate nasal pathobionts Staphylococcus aureus and Streptococcus pneumoniae rely on antibacterials. An alternative is the artificial inoculation of commensal bacteria, i.e., probiotic treatment, supported by the increasing evidence for commensal-mediated inhibition of pathogens. To systematically investigate the potential of this approach, we developed a quantitative framework simulating the nasal microbiome dynamics by combining mathematical modeling with longitudinal microbiota data. By inferring community parameters using 16S ribosomal RNA (rRNA) amplicon sequencing data and simulating the nasal microbial dynamics of patients colonized with S. aureus, we compared the decolonization performance of probiotic and antibiotic treatments under different assumptions on patients' community composition and susceptibility profile. To further compare the robustness of these treatments, we simulated an S. aureus challenge and quantified the recolonization probability. Through in vitro experiments using nasal swabs of adults colonized with S. aureus, we confirmed that after antibiotic treatment, recolonization of S. aureus was inhibited in samples treated with a probiotic mixture compared to the nontreated control. Our results suggest that probiotic treatment outperforms antibiotics in terms of decolonization performance, recolonization robustness, and leads to less collateral reduction in the microbiome diversity. Thus, probiotic treatment may provide a promising alternative to combat antibiotic resistance, with the additional advantage of personalized treatment options via using the patient's own metagenomic data. The combination of an in silico framework with in vitro experiments using clinical samples reported in this work is an important step forward to further investigate this alternative in clinical trials.}, }
@article {pmid39932663, year = {2025}, author = {da Silva Pereira, M and Alcantara, LM and de Freitas, LM and de Oliveira Ferreira, AL and Leal, PL}, title = {Microbial Rumen proteome analysis suggests Firmicutes and Bacteroidetes as key producers of lignocellulolytic enzymes and carbohydrate-binding modules.}, journal = {Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]}, volume = {56}, number = {2}, pages = {817-833}, pmid = {39932663}, issn = {1678-4405}, support = {Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior/ ; Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado da Bahia//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado da Bahia/ ; Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico/ ; }, mesh = {*Rumen/microbiology ; *Lignin/metabolism ; Animals ; *Bacteroidetes/enzymology/genetics/metabolism ; *Firmicutes/enzymology/genetics/metabolism ; *Proteome/genetics ; *Bacterial Proteins/metabolism/genetics ; Carbohydrate Metabolism ; Gastrointestinal Microbiome ; }, abstract = {Lignocellulosic biomass, rich in cellulose, hemicellulose, and lignin, offers a sustainable source for biofuels and and production of other materials such as polymers, paper, fabrics, bioplastics and biofertilizers. However, its complex structure hinders efficient conversion. Chemical, enzymatic, and microbial methods aim to unlock the trapped sugars and phenols. The rumen microbiome, a fascinating ecosystem within ruminant animals, holds particular promise. The Hungate 1000 project sequenced 410 microbial genomes from the rumen, enabling in silico screening for lignocellulolytic enzymes. This approach saves time and resources, supporting the development of sustainable bioconversion technologies aligned with the UN's 2030 agenda goals. Analysis of these 410 predicted proteomes revealed diverse carbohydrate-active enzymes (CAZymes) and carbohydrate-binding modules (CBMs) across various microorganisms. Notably, Firmicutes and Bacteroidetes dominated CAZyme and CBM production, suggesting collaborative efforts among different phyla during degradation. The presence of CBM50 and chitinases hints at the ability to utilize chitin from fungal cell walls. Interestingly, the absence of ligninolytic auxiliary activity enzymes reaffirms the rumen microbiome's incapability of directly degrading lignin. However, enzymes facilitating the loosening of the cell wall by cleaving lignin-hemicellulose linkages were identified. This suggests a strategy for making cellulose more accessible to hydrolytic enzymes. This study highlights the intricate relationship between rumen microbes, contributing necessary enzymes for plant cell wall deconstruction in this unique environment. Additionally, it underlines the power of in silico techniques for analyzing big data, paving the way for advancements in sustainable bioconversion.}, }
@article {pmid39932403, year = {2025}, author = {Momo Cabrera, P and Bokulich, NA and Zimmermann, P}, title = {Evaluating stool microbiome integrity after domestic freezer storage using whole-metagenome sequencing, genome assembly, and antimicrobial resistance gene analysis.}, journal = {Microbiology spectrum}, volume = {13}, number = {3}, pages = {e0227824}, pmid = {39932403}, issn = {2165-0497}, support = {PZPGP3_193140/SNSF_/Swiss National Science Foundation/Switzerland ; }, mesh = {Humans ; *Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; Child, Preschool ; *Metagenome/genetics ; *Specimen Handling/methods ; Infant ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Freezing ; Female ; Male ; Metagenomics ; }, abstract = {UNLABELLED: The gut microbiome is crucial for host health. Early childhood is a critical period for the development of a healthy gut microbiome, but it is particularly sensitive to external influences. Recent research has focused on using advanced techniques like shotgun metagenome sequencing to identify key microbial signatures and disruptions linked to disease. For accurate microbiome analysis, samples need to be collected and stored under specific conditions to preserve microbial integrity and composition, with -80°C storage considered the gold standard for stabilization. This study investigates the effect of domestic freezer storage on the microbial composition of stool samples obtained from 20 children under 4 years of age with the use of shotgun metagenome sequencing. Fresh stool samples were aliquoted into sterile tubes, with one aliquot stored at 4°C and analyzed within 24 hours, while others were frozen in domestic freezers (below -18°C) and analyzed after 1 week, 2 months, and 6 months. Assessments of contig assembly quality, microbial diversity, and antimicrobial resistance genes revealed no significant degradation or variation in microbial composition.<br><br>IMPORTANCE: Most prior studies on sample storage have relied on amplicon sequencing, which is less applicable to metagenome sequencing-given considerations of contig quality and functional gene detection-and less reliable in representing microbial composition. Moreover, the effects of domestic freezer storage for at-home stool collection on microbiome profiles, contig quality, and antimicrobial resistance gene profiles have not been previously investigated. Our findings suggest that stool samples stored in domestic freezers for up to 6 months maintain the integrity of metagenomic data. These findings indicate that domestic freezer storage does not compromise the integrity or reproducibility of metagenomic data, offering a reliable and accessible alternative for temporary sample storage. This approach enhances the feasibility of large-scale at-home stool collection and citizen science projects, even those focused on the more easily perturbed early life microbiome. This advancement enables more inclusive research into the gut microbiome, enhancing our understanding of its role in human health.}, }
@article {pmid39932299, year = {2025}, author = {Cui, H and Wang, S and Fan, S and Long, H and Lin, J and Ding, W and Zhang, W}, title = {Branched-chain amino acid metabolism supports Roseobacteraceae positive interactions in marine biofilms.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {3}, pages = {e0241124}, pmid = {39932299}, issn = {1098-5336}, mesh = {*Biofilms/growth &amp; development ; *Rhodobacteraceae/metabolism/physiology/genetics ; *Amino Acids, Branched-Chain/metabolism ; *Seawater/microbiology ; *Microbial Interactions ; }, abstract = {UNLABELLED: Interspecies interactions are key factors affecting the stability of microbial communities. However, microbial interactions in marine biofilms, which constitute up to 80% of the microbial biomass in certain marine environments, are not well understood. We addressed this knowledge gap by coculturing four marine biofilm-derived Roseobacteraceae strains (Leisingera aquaemixtae M597, Roseibium aggregatum S1616, Alloyangia pacifica T6124, and Sulfitobacter indolifex W002) in 14 single carbon sources. Overall, 140 coculture experiments revealed 39.3% positive interactions compared to 8.3% negative interactions. When the carbon source was consumed by only one strain, the interaction between the strains was more likely to be positive. The interaction between S1616 and M597, when cultured in D-gluconic acid, was further studied as an example. S1616-M597 coculture displayed a higher D-gluconic acid consumption rate than S1616 monoculture, whereas M597 could not use D-gluconic acid as the sole carbon source. The supernatant of S1616 monoculture supported the growth of M597, and branched-chain amino acids in the supernatant were consumed. Transcriptomic analysis suggested that M597 induced the expression of genes for branched-chain amino acid biosynthesis in S1616. Additionally, metagenomic analysis revealed the wide distribution and a strongly correlated co-occurrence of the four strains in global oceanic biofilms. Together, our findings show that interspecies positive interactions are prevalent among marine-biofilm Roseobacteraceae, and the interactions are likely to be mediated by branched-chain amino acids metabolism.<br><br>IMPORTANCE: Interspecies interactions are crucial for microbial community structure and function. Despite well-studied social behaviors in model microorganisms, species interactions in natural marine biofilms especially Roseobacteraceae with complex metabolic pathways are not well understood. Our findings suggest that positive microbial interactions, which can be mediated by branched-chain amino acid biosynthesis, are common among marine-biofilm Roseobacteraceae. This study provides new insights into microbial interactions and the ecology of marine biofilms.}, }
@article {pmid39931947, year = {2025}, author = {Liu, Y and Zhao, T and Wang, Z and Zhang, Y and Shen, J and Lu, B}, title = {The microbiome- and metabolome-modulating activity of dietary cholesterol: insights from the small and large intestines.}, journal = {Food &amp; function}, volume = {16}, number = {5}, pages = {1872-1887}, doi = {10.1039/d4fo03049d}, pmid = {39931947}, issn = {2042-650X}, mesh = {*Gastrointestinal Microbiome/drug effects ; Animals ; Humans ; *Metabolome/drug effects ; *Intestine, Small/microbiology/metabolism ; *Cholesterol, Dietary/metabolism/pharmacology ; Male ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Intestine, Large/microbiology/metabolism ; Mice ; Cholesterol/metabolism ; Mice, Inbred C57BL ; }, abstract = {Cholesterol is an important lipid molecule that affects the gut microbiome upon ingestion. We systematically investigated the effects of cholesterol on the microbiota of the large and small intestines using ex vivo and in vivo models, combining flow cytometry, metabolomics, and metagenomics. The results showed that cholesterol directly causes a loss of bacterial membrane polarity and integrity, as well as a reduction in microbial metabolic activity. Cholesterol directly affected the global metabolism of the large and small intestinal microbiota, including amino acid, carbohydrate, and nucleotide metabolism. Ex vivo and in vivo studies shared similar results, showing that cholesterol increased the abundance of the primary bile acid-metabolizing bacteria Clostridium and Dorea in the large intestinal microbiota, confirming the enrichment effect of cholesterol on these bacteria. In the in vivo model, increased conjugated bile acids in the small intestine and decreased abundance of BSH-containing Bifidobacterium were observed due to cholesterol. Only in vivo models have demonstrated that cholesterol increases phosphatidylcholine levels in both the small and large intestines, which may be related to the effects of cholesterol on host metabolism. The pro-inflammatory capacity of the intestinal microbiota was enhanced by cholesterol, as evidenced by the increased levels of IL-1β and TNF-α in THP-1 cells upon stimulation with cholesterol-treated microbiota. This study comprehensively elucidates the effects of cholesterol on the composition and metabolic functions of the microbiota in both the large and small intestines. It offers a novel perspective on the ways in which cholesterol affects host metabolism via the gut microbiome.}, }
@article {pmid39930907, year = {2025}, author = {Doorenspleet, K and Jansen, L and Oosterbroek, S and Kamermans, P and Bos, O and Wurz, E and Murk, A and Nijland, R}, title = {The Long and the Short of It: Nanopore-Based eDNA Metabarcoding of Marine Vertebrates Works; Sensitivity and Species-Level Assignment Depend on Amplicon Lengths.}, journal = {Molecular ecology resources}, volume = {25}, number = {4}, pages = {e14079}, pmid = {39930907}, issn = {1755-0998}, support = {//European Regional Development Fund Interreg North Sea region GEANS/ ; TEWZ118017//Rijksdienst voor Ondernemend Nederland/ ; }, mesh = {Animals ; *DNA Barcoding, Taxonomic/methods ; North Sea ; *Vertebrates/classification/genetics ; *Aquatic Organisms/classification/genetics ; DNA Primers/genetics ; Biodiversity ; *Nanopore Sequencing/methods ; *Metagenomics/methods ; *DNA, Environmental/genetics ; Fishes/genetics/classification ; Sequence Analysis, DNA ; DNA, Mitochondrial/genetics ; }, abstract = {To monitor the effect of nature restoration projects in North Sea ecosystems, accurate and intensive biodiversity assessments are vital. DNA-based techniques and especially environmental (e)DNA metabarcoding is becoming a powerful monitoring tool. However, current approaches rely on genetic target regions under 500 bp, offering limited taxonomic resolution. We developed a method for long-read eDNA metabarcoding, using Nanopore sequencing of a longer amplicon and present DECONA, a read processing pipeline to enable improved identification of marine vertebrate species. We designed a universal primer pair targeting a 2 kb region of fish mitochondrial DNA and compared it to the commonly used MiFish primer pair targeting a ~ 170 bp region. In silico testing showed that 2 kb fragments improved accurate identification of closely related species. Analysing eDNA from a North Sea aquarium showed that sequences from both primer pairs could be assigned to most species, and additional species level assignments could be made through the 2 kb primer pair. Interestingly, this difference was opposite in eDNA from the North Sea, where not the 2 kb but the MiFish primer pair detected more species. This study demonstrates the feasibility of using long-read metabarcoding for eDNA vertebrate biodiversity assessments. However, our findings suggests that longer fragments are less abundant in environmental settings, but not in aquarium settings, suggesting that longer fragments may provide a more recent snapshot of the community. Thus, long-read metabarcoding can expand the molecular toolbox for biodiversity assessments by improving species-level identification and may be especially useful when the temporal origin of the eDNA signal is better understood.}, }
@article {pmid39930446, year = {2025}, author = {Dong, L and Ji, Z and Hu, J and Jiang, Q and Wei, W}, title = {Oral microbiota shifts following tooth loss affect gut health.}, journal = {BMC oral health}, volume = {25}, number = {1}, pages = {213}, pmid = {39930446}, issn = {1472-6831}, support = {YSP202314//Young Scientist Program of Beijing Stomatological Hospital, Capital Medical University/ ; }, mesh = {Animals ; *Tooth Loss/microbiology ; Mice ; Mice, Inbred C57BL ; *Gastrointestinal Microbiome/physiology ; Feces/microbiology ; Saliva/microbiology ; *Mouth/microbiology ; RNA, Ribosomal, 16S/analysis ; *Microbiota ; Male ; }, abstract = {BACKGROUND: Tooth loss not only impairs oral function but also affects gut health by altering the host microbiota. Understanding the oral-gut axis can provide insights into systemic health implications following tooth loss.<br><br>METHODS: Using an animal model, we extracted the molars of C57 mice. Saliva and fecal samples were collected for 16S rRNA and metagenomic sequencing to analyze changes in the oral and gut microbiota. Pearson correlation analysis assessed the relationship between altered microbial communities.<br><br>RESULTS: The study found a significant reduction in oral microbiota diversity following tooth loss, with increased Proteobacteria and decreased Muribacter. Gut microbiota showed increased Firmicutes and decreased Bacteroidota. Correlations between oral and gut microbiota changes were observed, indicating a potential link between tooth loss and alterations in intestinal microbial balance.<br><br>CONCLUSION: In the mouse model, tooth loss disrupted the balance of the oral-gut microbiota, with potential implications for intestinal health. Although these findings are from a murine model, considering the existence of the oral-gut axis balance in the human body, it is reasonable to postulate that following tooth loss in humans, the health of the intestinal microecology may also warrant attention.}, }
@article {pmid39930064, year = {2025}, author = {Eriksen, AMH and Rodríguez, JA and Seersholm, F and Hollund, HI and Gotfredsen, AB and Collins, MJ and Grønnow, B and Pedersen, MW and Gilbert, MTP and Matthiesen, H}, title = {Exploring DNA degradation in situ and in museum storage through genomics and metagenomics.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {210}, pmid = {39930064}, issn = {2399-3642}, mesh = {*Museums ; *Metagenomics/methods ; *Genomics/methods ; Animals ; *DNA/genetics ; Archaeology ; Microbiota ; Greenland ; DNA, Ancient/analysis ; *Specimen Handling ; Bone and Bones/microbiology ; DNA Damage ; Fossils ; }, abstract = {Understanding the environmental and microbial processes involved in DNA degradation from archaeological remains is a fundamental part of managing bone specimens. We investigated the state of DNA preservation in 33 archaeozoological caribou (Rangifer tarandus) ribs excavated from the same excavation trench at a former Inuit hunting camp in West Greenland, separated by 43 years: 1978 and 2021. Our findings show that DNA is better preserved in the most recently excavated samples, indicating a detrimental effect of museum storage on DNA integrity. Additionally, our data reveals a diverse microbiome in these bones, encoding genes relevant for bone degradation, such as enzymatic families relating to collagenases, peptidases and glycosidases. Microbes associated with bone degradation were present in both new and historical samples, with museum-stored bones showing significantly more DNA damage. Overall, our research sheds light on the nuanced dynamics governing the preservation of genomic material in archaeological contexts, underscoring the vital importance of careful considerations in museum curation practices for the sustainable conservation of invaluable skeletal records in museum repositories and in situ.}, }
@article {pmid39929976, year = {2025}, author = {Sardar, P and Beresford-Jones, BS and Xia, W and Shabana, O and Suyama, S and Ramos, RJF and Soderholm, AT and Tourlomousis, P and Kuo, P and Evans, AC and Imianowski, CJ and Conti, AG and Wesolowski, AJ and Baker, NM and McCord, EAL and Okkenhaug, K and Whiteside, SK and Roychoudhuri, R and Bryant, CE and Cross, JR and Pedicord, VA}, title = {Gut microbiota-derived hexa-acylated lipopolysaccharides enhance cancer immunotherapy responses.}, journal = {Nature microbiology}, volume = {10}, number = {3}, pages = {795-807}, pmid = {39929976}, issn = {2058-5276}, support = {206245/Z/17/Z//Wellcome Trust (Wellcome)/ ; EP/X024709/1//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; 302351/Z/23/Z//Wellcome Trust (Wellcome)/ ; A2194//Rosetrees Trust/ ; /WT_/Wellcome Trust/United Kingdom ; }, mesh = {*Gastrointestinal Microbiome/immunology/drug effects ; *Lipopolysaccharides/metabolism/chemistry/immunology/pharmacology ; Animals ; Mice ; Humans ; *Immunotherapy/methods ; Programmed Cell Death 1 Receptor/antagonists &amp; inhibitors/immunology ; Female ; *Melanoma/therapy/immunology/microbiology ; Mice, Inbred C57BL ; Bacteria/metabolism/genetics/classification ; Immune Checkpoint Inhibitors/therapeutic use/pharmacology ; Toll-Like Receptor 4/antagonists &amp; inhibitors ; Feces/microbiology ; Acylation ; Cell Line, Tumor ; Male ; }, abstract = {The gut microbiome modulates immunotherapy treatment responses, and this may explain why immune checkpoint inhibitors, such as anti-PD-1, are only effective in some patients. Previous studies correlated lipopolysaccharide (LPS)-producing gut microbes with poorer prognosis; however, LPS from diverse bacterial species can range from immunostimulatory to inhibitory. Here, by functionally analysing faecal metagenomes from 112 patients with melanoma, we found that a subset of LPS-producing bacteria encoding immunostimulatory hexa-acylated LPS was enriched in microbiomes of clinical responders. In an implanted tumour mouse model of anti-PD-1 treatment, microbiota-derived hexa-acylated LPS was required for effective anti-tumour immune responses, and LPS-binding antibiotics and a small-molecule TLR4 antagonist abolished anti-PD-1 efficacy. Conversely, oral administration of hexa-acylated LPS to mice significantly augmented anti-PD-1-mediated anti-tumour immunity. Penta-acylated LPS did not improve anti-PD-1 efficacy in vivo and inhibited hexa-acylated LPS-induced immune activation in vitro. Microbiome hexa-acylated LPS therefore represents an accessible predictor and potential enhancer of immunotherapy responses.}, }
@article {pmid39929376, year = {2025}, author = {Wu, B and Tang, Y and Zhao, L and Gao, Y and Shen, X and Xiao, S and Yao, S and Qi, H and Shen, F}, title = {Integrated network pharmacological analysis and multi-omics techniques to reveal the mechanism of polydatin in the treatment of silicosis via gut-lung axis.}, journal = {European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences}, volume = {207}, number = {}, pages = {107030}, doi = {10.1016/j.ejps.2025.107030}, pmid = {39929376}, issn = {1879-0720}, mesh = {Animals ; *Glucosides/pharmacology/therapeutic use ; *Stilbenes/pharmacology/therapeutic use ; *Silicosis/drug therapy/metabolism/pathology ; *Gastrointestinal Microbiome/drug effects ; Male ; *Lung/drug effects/metabolism/pathology ; Network Pharmacology ; Rats, Sprague-Dawley ; Molecular Docking Simulation ; Rats ; Silicon Dioxide ; Metabolomics ; Fatty Acids, Volatile/metabolism ; Multiomics ; }, abstract = {Silicosis is a pulmonary disease characterized by inflammation and progressive fibrosis. Previous studies have shown that polydatin (PD) has potential biological activity in key signaling pathways regulating inflammation and apoptosis. To investigate the effect of PD on rats with silicosis, this study used network pharmacology and molecular docking methods to determine the target of PD treatment for silicosis. The therapeutic effect of PD on silicosis was confirmed by measuring the lung injury score, hydroxyproline content, and mRNA expression levels of key targets. In addition, metagenomic sequencing and gas chromatography-mass spectrometry were used to determine the gut microbiota composition and targeted metabolomics analysis, respectively. The results showed that PD could inhibit the expression of inflammation-related indexes and apoptosis-related indexes at protein and mRNA levels. PD also regulates the diversity of the intestinal flora and the content of short-chain fatty acids. In conclusion, the current data suggest that PD has a protective effect against silica-induced lung injury and plays a protective role in regulating intestinal flora diversity and short-chain fatty acid levels through the gut-lung axis.}, }
@article {pmid39929003, year = {2025}, author = {Bakir-Gungor, B and Temiz, M and Canakcimaksutoglu, B and Yousef, M}, title = {Prediction of colorectal cancer based on taxonomic levels of microorganisms and discovery of taxonomic biomarkers using the Grouping-Scoring-Modeling (G-S-M) approach.}, journal = {Computers in biology and medicine}, volume = {187}, number = {}, pages = {109813}, doi = {10.1016/j.compbiomed.2025.109813}, pmid = {39929003}, issn = {1879-0534}, mesh = {*Colorectal Neoplasms/microbiology/diagnosis/genetics ; Humans ; *Gastrointestinal Microbiome/genetics ; *Biomarkers, Tumor/genetics ; *Metagenomics/methods ; Algorithms ; *Bacteria/classification/genetics ; }, abstract = {Colorectal cancer (CRC) is one of the most prevalent forms of cancer globally. The human gut microbiome plays an important role in the development of CRC and serves as a biomarker for early detection and treatment. This research effort focuses on the identification of potential taxonomic biomarkers of CRC using a grouping-based feature selection method. Additionally, this study investigates the effect of incorporating biological domain knowledge into the feature selection process while identifying CRC-associated microorganisms. Conventional feature selection techniques often fail to leverage existing biological knowledge during metagenomic data analysis. To address this gap, we propose taxonomy-based Grouping Scoring Modeling (G-S-M) method that integrates biological domain knowledge into feature grouping and selection. In this study, using metagenomic data related to CRC, classification is performed at three taxonomic levels (genus, family and order). The MetaPhlAn tool is employed to determine the relative abundance values of species in each sample. Comparative performance analyses involve six feature selection methods and four classification algorithms. When experimented on two CRC associated metagenomics datasets, the highest performance metric, yielding an AUC of 0.90, is observed at the genus taxonomic level. At this level, 7 out of top 10 groups (Parvimonas, Peptostreptococcus, Fusobacterium, Gemella, Streptococcus, Porphyromonas and Solobacterium) were commonly identified for both datasets. Moreover, the identified microorganisms at genus, family, and order levels are thoroughly discussed via refering to CRC-related metagenomic literature. This study not only contributes to our understanding of CRC development, but also highlights the applicability of taxonomy-based G-S-M method in tackling various diseases.}, }
@article {pmid39927868, year = {2025}, author = {Zouiouich, S and Wan, Y and Vogtmann, E and Porras, C and Abnet, CC and Shi, J and Sinha, R}, title = {Sample Size Estimations Based on Human Microbiome Temporal Stability Over 6 Months: A Shallow Shotgun Metagenome Sequencing Analysis.}, journal = {Cancer epidemiology, biomarkers &amp; prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology}, volume = {34}, number = {4}, pages = {588-597}, doi = {10.1158/1055-9965.EPI-24-0839}, pmid = {39927868}, issn = {1538-7755}, support = {//Division of Intramural Research (DIR)/ ; }, mesh = {Humans ; *Metagenome/genetics ; *Feces/microbiology ; Case-Control Studies ; Sample Size ; *Microbiota/genetics ; Female ; Male ; *Gastrointestinal Microbiome/genetics ; }, abstract = {BACKGROUND: Biological factors affect the human microbiome, highlighting the need for reasonably estimating sample sizes in future population studies.<br><br>METHODS: We assessed the temporal stability of fecal microbiome diversity, species composition, and genes and functional pathways through shallow shotgun metagenome sequencing. Using intraclass correlation coefficients (ICC), we measured biological variability over 6 months. We estimated case numbers for 1:1 or 1:3 matched case-control studies, considering significance levels of 0.05 and 0.001 with 80% power, based on the collected fecal specimens per participant.<br><br>RESULTS: The fecal microbiome's temporal stability over 6 months varied (ICC < 0.6) for most alpha and beta diversity metrics. Heterogeneity was seen in species, genes, and pathways stability (ICC, 0.0-0.9). Detecting an OR of 1.5 per SD required 1,000 to 5,000 cases (0.05 significance for alpha and beta; 0.001 for species, genes, and pathways) with equal cases and controls. Low-prevalence species needed 15,102 cases, and high-prevalence species required 3,527. Similar needs applied to genes and pathways. In a 1:3 matched case-control study with one fecal specimen, 10,068 cases were needed for low-prevalence species and 2,351 for high-prevalence species. For ORs of 1.5 with multiple specimens, cases needed for low-prevalence species were 15,102 (one specimen), 8,267 (two specimens), and 5,989 (three specimens).<br><br>CONCLUSIONS: Detecting disease associations requires a large number of cases. Repeating prediagnostic samples and matching cases to more controls could decrease the needed number of cases for such detections.<br><br>IMPACT: Our results will help future epidemiologic study designs and implement well-powered microbiome studies.}, }
@article {pmid39927795, year = {2025}, author = {Huang, D and Chen, Y and Li, C and Yang, S and Lin, L and Zhang, X and Su, X and Liu, L and Zhao, H and Luo, T and Cai, S and Ren, Q and Dong, H}, title = {Variations in salivary microbiome and metabolites are associated with immunotherapy efficacy in patients with advanced NSCLC.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0111524}, pmid = {39927795}, issn = {2379-5077}, support = {No. 82302919//MOST | National Natural Science Foundation of China (NSFC)/ ; No. 82270024//MOST | National Natural Science Foundation of China (NSFC)/ ; No. 82170032//MOST | National Natural Science Foundation of China (NSFC)/ ; No. 2023A1515110216//GDSTC |Guangdong Basic and Applied Basic Research Foundation ()/ ; No. 2023A1515012879//GDSTC |Guangdong Basic and Applied Basic Research Foundation ()/ ; 2023M731556//China Postdoctoral Science Foundation (China Postdoctoral Foundation Project)/ ; 2023M731546//China Postdoctoral Science Foundation (China Postdoctoral Foundation Project)/ ; 2024T170385//China Postdoctoral Science Foundation (China Postdoctoral Foundation Project)/ ; 2021CR012//Clinical Research Program of Nanfang Hospital, Southern Medical University/ ; }, mesh = {Humans ; *Carcinoma, Non-Small-Cell Lung/microbiology/metabolism/therapy/drug therapy/immunology ; *Saliva/microbiology/metabolism ; *Lung Neoplasms/microbiology/metabolism/therapy/immunology/drug therapy ; Female ; Male ; *Microbiota ; Middle Aged ; *Immunotherapy/methods ; Aged ; Immune Checkpoint Inhibitors/therapeutic use ; Treatment Outcome ; B7-H1 Antigen/metabolism ; }, abstract = {Lung cancer is a leading cause of cancer mortality, with non-small cell lung cancer (NSCLC) comprising the majority of cases. Despite the advent of immune checkpoint inhibitors (ICIs), a significant number of patients fail to achieve a durable response, highlighting the need to understand the factors influencing treatment efficacy. Saliva samples and tumor samples were collected from 20 NSCLC patients. The salivary microbiota was profiled using metagenomic next-generation sequencing, and metabolites were analyzed via liquid chromatography-mass spectrometry to identify correlations among bacteria, metabolites, and immunotherapy responses. Immunohistochemistry (IHC) analysis of tissue samples verified the result. Besides, in vitro experiments and tumor tissue microarray, including 70 NSCLC patients, were utilized to further explore the potential mechanism linking the oral microbiome and immunotherapy efficacy. The study revealed several differential species and distinct metabolite compositions between responders and non-responders to ICI therapy in NSCLC and explored correlations and mechanisms between microbiota metabolites and immunotherapy resistance. Notably, it was found that several Neisseria and Actinomyces species were significantly enriched in responders and identified lipids and lipid-like molecules associated with PD-L1 expression levels and treatment outcomes. Importantly, several differential lipid molecules were associated with differential species. Further, in vitro experiments and IHC experiments indicated that abnormal fat metabolism linked to dysbiosis is correlated with immunotherapy resistance through regulation of CD8[+] T cell activity/infiltration and PD-L1 expression. Specific saliva microbiome and its associated lipids metabolites are significantly associated with the efficacy of ICI-based therapy in lung cancer. Our findings suggest that oral microbiome modulation and targeting lipid metabolism could improve immunotherapy responses, offering new avenues for personalized treatment strategies.IMPORTANCEIn non-small cell lung cancer, our study links specific salivary microbiome profiles and related lipid metabolites to the efficacy of immune checkpoint inhibitor (ICI) therapies. Responders showed enrichment of certain Neisseria and Actinomyces species and distinct lipid compositions. These lipids correlate with PD-L1 expression and CD8[+] T cell activity, affecting treatment outcomes. Our results imply that modulating the oral microbiome and targeting lipid metabolism may enhance ICI effectiveness, suggesting novel personalized therapeutic approaches.}, }
@article {pmid39927333, year = {2024}, author = {Safika, S and Indrawati, A and Hidayat, R and Puarada, ARR}, title = {Characterizing the gut microbiome of birds-of-paradise in the northwest lowland of Papua Island.}, journal = {Open veterinary journal}, volume = {14}, number = {12}, pages = {3345-3354}, pmid = {39927333}, issn = {2218-6050}, mesh = {Animals ; *Gastrointestinal Microbiome ; Indonesia ; Feces/microbiology ; Bacteria/classification/isolation &amp; purification/genetics ; *Passeriformes/microbiology ; }, abstract = {BACKGROUND: Birds-of-paradise, renowned for their stunning plumage and intricate mating rituals, have been extensively studied for their external characteristics. However, the microbial communities inhabiting their digestive tracts remain largely unexplored. The gut microbiome plays a vital role in host health and physiology, influencing digestion, nutrient absorption, and immune function. Understanding the microbiome of birds-of-paradise, particularly in their unique tropical rainforest habitats, may offer valuable insights into their adaptation and overall health.<br><br>AIM: This study aims to characterize the gut microbiome of birds-of-paradise and to explore the relationship between microbiome and host.<br><br>METHODS: Fecal samples were collected from Jayapura Regency, Indonesia, with non-invasive sampling methods. DNA was extracted using the DNeasy PowerSoil Pro Kit. Shotgun metagenomic sequencing was performed on the MGI DNBSEQ-G400 platform to obtain DNA sequences. DNA sequences were analyzed using DIAMOND followed by MEGAN6 to provide insights into the relative abundance of bacterial taxa within the microbiome.<br><br>RESULTS: Using Operational Taxonomy Unit analysis we identified 1,398,117 sequences from 5,048,280 initial sequences. Proteobacteria, Bacteroidetes, Firmicutes, Actinobacteria, and Acidobacteria were the dominant phyla, with other phyla present in smaller amounts. Burkholderiales, Hyphomicrobiales, Sphingobacteriales, and Enterobacterales were dominant orders, each with specific functional roles. Family and Genus-Level Abundance: Flavobacteriaceae, Comamonadaceae, and Sphingobacteriaceae were dominant families, while Flavobacterium, Delftia, and Pedobacter were dominant genera. Delftia sp., Pedobacter sp., Klebsiella pneumoniae, Achromobacter sp., Bacillus pumilus, Rhizobium sp., and Brevundimonas sp. were among the most abundant species.<br><br>CONCLUSION: The microbiome in the gut of birds-of-paradise is characterized by a diverse community of bacteria, fungi, and other microorganisms. The abundance of specific orders, families, and genera varies between samples, suggesting that differences in diet, habitat, or host genetics may influence microbiome composition. The findings reveal a diverse and complex microbial community that likely plays a crucial role in host health and physiology.}, }
@article {pmid39925879, year = {2025}, author = {Gao, Y and Qin, G and Liang, S and Yin, J and Wang, B and Jiang, H and Liu, M and Luo, F and Li, X}, title = {Metagenomic Sequencing Combined with Metabolomics to Explore Gut Microbiota and Metabolic Changes in Mice with Acute Myocardial Infarction and the Potential Mechanism of Allicin.}, journal = {Drug design, development and therapy}, volume = {19}, number = {}, pages = {771-791}, pmid = {39925879}, issn = {1177-8881}, mesh = {Animals ; *Sulfinic Acids/pharmacology/administration &amp; dosage ; *Gastrointestinal Microbiome/drug effects ; Disulfides/pharmacology ; Mice ; *Myocardial Infarction/drug therapy/metabolism/microbiology ; *Metabolomics ; Male ; *Metagenomics ; Mice, Inbred C57BL ; Disease Models, Animal ; *Cardiotonic Agents/pharmacology/administration &amp; dosage ; }, abstract = {BACKGROUND: Acute myocardial infarction (AMI) is a significant contributor to global morbidity and mortality. Allicin exhibits promising therapeutic potential in AMI as a primary bioactive component derived from garlic; however, its underlying mechanisms remain incompletely elucidated.<br><br>METHODS: Our study induced AMI in mice by ligating the left coronary artery, and administered allicin orally for 28 days. The cardioprotective effects of allicin treatment were comprehensively assessed using echocardiography, histopathological examinations, intestinal barrier function, and serum inflammatory factors. The potential mechanisms of allicin were elucidated through analysis of metagenomics and serum metabolomics. Network pharmacology (NP) was used to further investigate and validate the possible molecular mechanisms of allicin.<br><br>RESULTS: Our findings revealed allicin's capacity to ameliorate cardiac impairments, improve intestinal barrier integrity, and reduce serum IL-18 and IL-1&#x3b2; levels after AMI. Further analysis demonstrated that the administration of allicin has the potential to ameliorate intestinal flora disorder following AMI by modulating the abundance of beneficial bacteria, such as g_Lactobacillus, g_Prevotella, g_Alistipes, and g_Limosilactobacillus, while reducing the abundance of harmful bacteria g_Parasutterella. Additionally, it exhibits the ability to enhance myocardial energy metabolism flexibility through modulating metabolites and key enzymes associated with the fatty acid metabolic pathway. Mechanistically, NP and in vivo experiments indicated that allicin might suppress pyroptosis and reduce inflammatory response via blocked activation of the NF-&#x3ba;B-mediated NLRP3/Caspase-1/GSDMD pathway. Moreover, Spearman correlation analysis suggested a significant association between the allicin-induced alterations in microbiota and metabolites with cardiac function and inflammatory cytokines.<br><br>CONCLUSION: Our study demonstrated that allicin alleviated myocardial injury and reduced inflammatory response by inhibiting the NF-&#x3ba;B-mediated NLRP3/Caspase-1/GSDMD pathway while remodeling microbiota disturbance, improving serum metabolic disorder, and enhancing the intestinal barrier. These research findings offer a novel perspective on the potential therapeutic value of allicin as an adjunctive dietary supplement to conventional treatments for AMI.}, }
@article {pmid39924893, year = {2025}, author = {Chen, Y and Fang, H and Chen, H and Liu, X and Zhao, J and Stanton, C and Ross, RP and Chen, W and Yang, B}, title = {Bifidobacterium inhibits the progression of colorectal tumorigenesis in mice through fatty acid isomerization and gut microbiota modulation.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2464945}, pmid = {39924893}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome/physiology ; Animals ; Mice ; *Colorectal Neoplasms/microbiology/prevention &amp; control/pathology/metabolism ; Humans ; *Bifidobacterium/metabolism/physiology ; Linoleic Acids, Conjugated/metabolism ; Male ; Female ; *Fatty Acids/metabolism/chemistry ; Disease Models, Animal ; *Carcinogenesis ; Butyric Acid/metabolism ; Fecal Microbiota Transplantation ; Probiotics/administration &amp; dosage ; PPAR gamma/metabolism ; Mice, Inbred C57BL ; Bacteria/classification/metabolism/genetics/isolation &amp; purification ; }, abstract = {Colorectal cancer (CRC) represents the third most common cancer worldwide. Consequently, there is an urgent need to identify novel preventive and therapeutic strategies for CRC. This study aimed to screen for beneficial bacteria that have a preventive effect on CRC and to elucidate the potential mechanisms. Initially, we compared gut bacteria and bacterial metabolites of healthy volunteers and CRC patients, which demonstrated that intestinal conjugated linoleic acid (CLA), butyric acid, and Bifidobacterium in CRC patients were significantly lower than those in healthy volunteers, and these indicators were significantly negatively correlated with CRC. Next, spontaneous CRC mouse model were conducted to explore the effect of supplemental CLA-producing Bifidobacterium on CRC. Supplementation of mice with CLA-producing Bifidobacterium breve CCFM683 and B. pseudocatenulatum MY40C significantly prevented CRC. Moreover, molecular approaches demonstrated that CLA and the CLA-producing gene, bbi, were the key metabolites and genes for CCFM683 to prevent CRC. Inhibitor intervention results showed that PPAR-γ was the key receptor for preventing CRC. CCFM683 inhibited the NF-κB signaling pathway, up-regulated MUC2, Claudin-1, and ZO-1, and promoted tumor cell apoptosis via the CLA-PPAR-γ axis. Additionally, fecal microbiota transplantation (FMT) and metagenomic analysis showed that CCFM683 up-regulated Odoribacter splanchnicus through CLA production, which then prevented CRC by producing butyric acid, up-regulating TJ proteins, regulating cytokines, and regulating gut microbiota. These results will contribute to the clinical trials of Bifidobacterium and the theoretical research and development of CRC dietary products.}, }
@article {pmid39923562, year = {2025}, author = {Solazzo, G and Rovelli, S and Iodice, S and Chung, M and Frimpong, M and Bollati, V and Ferrari, L and Ghedin, E}, title = {The microbiome of Total Suspended Particles and its influence on the respiratory microbiome of healthy office workers.}, journal = {Ecotoxicology and environmental safety}, volume = {291}, number = {}, pages = {117874}, pmid = {39923562}, issn = {1090-2414}, support = {ZIA AI001323/ImNIH/Intramural NIH HHS/United States ; }, mesh = {Humans ; *Microbiota ; *Particulate Matter/analysis/adverse effects ; Adult ; *Air Pollution, Indoor/analysis ; Male ; *Occupational Exposure/analysis ; Bacteria ; Female ; *Air Pollutants/analysis ; Environmental Monitoring ; Respiratory System/microbiology ; Nasopharynx/microbiology ; }, abstract = {Air particulate matter (PM) is widely recognized for its potential to negatively affect human health, including changes in the upper respiratory microbiome. However, research on PM-associated microbiota remains limited and mostly focused on PM (e.g., PM2.5 and PM10). This study aims to characterize for the first time the microbiome of Total Suspended Particles (TSP) and investigate the correlations of indoor TSP with the human upper respiratory microbiome. Biological and environmental samples were collected over three collection periods lasting three weeks each, between May and July 2022 at the University of Milan and the University of Insubria Como. TSP were sampled using a filter-based technique, while respiratory samples from both anterior nares (AN) and the nasopharynx (NP) were collected using swabs. Microbiome analysis of both human (N = 145) and TSP (N = 51) samples was conducted on metagenomic sequencing data. A comparison of indoor and outdoor TSP microbiomes revealed differences in microbial diversity and taxonomic composition. The indoor samples had higher relative abundance of environmental bacteria often associated with opportunistic infections like Paracoccus sp., as well as respiratory bacteria such as Staphylococcus aureus and Klebsiella pneumoniae. Additionally, both indoor and outdoor TSP samples contained broad spectrum antibiotic resistance genes. Indoor TSP exposure was negatively associated with commensal bacteria and positively associated with Staphylococcus aureus relative abundance. Finally, a correlation between the relative abundance of respiratory bacteria identified in the indoor TSP and the upper respiratory microbiome was found, suggesting a potential interaction between TSP and the upper airways.}, }
@article {pmid39923519, year = {2025}, author = {Peng, Q and Cheng, S and Lin, J and Zheng, H and Xie, G}, title = {Metabolic and microbial functionality during the fermentation of traditional Amaranth stems: Insights from metagenomics, flavoromics, and metabolomics.}, journal = {Food chemistry}, volume = {474}, number = {}, pages = {143216}, doi = {10.1016/j.foodchem.2025.143216}, pmid = {39923519}, issn = {1873-7072}, mesh = {Fermentation ; Metagenomics ; Metabolomics ; *Amaranthus/microbiology/metabolism/chemistry ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; *Flavoring Agents/metabolism/chemistry ; Volatile Organic Compounds/metabolism/chemistry ; *Plant Stems/microbiology/metabolism/chemistry ; Microbiota ; Taste ; }, abstract = {Fermented Amaranth stems is a traditional Chinese fermented vegetable known for its distinctive aroma, produced through natural microbial fermentation. However, the metabolic processes, flavor compounds, and microbial communities involved in its fermentation are not well understood. This study provides a comprehensive analysis using an integrated approach combining flavoromics, untargeted metabolomics, and metagenomics to examine the dynamic changes in metabolites and microbiota during fermentation. A total of 108 volatile organic compounds were identified, with sugar metabolism peaking on the third day of fermentation. The microbial community analysis revealed that key genera such as Pseudomonas, Acinetobacter, Pectobacterium, and Enterobacter play a significant role in flavor formation. The findings offer critical insights into the fermentation mechanisms and the production of flavor compounds, providing a foundation for optimizing fermentation processes and improving the flavor quality of fermented Amaranth stems. This research holds practical significance for enhancing food safety by controlling microbial communities during fermentation.}, }
@article {pmid39923290, year = {2025}, author = {Wang, S and Wu, M}, title = {Decoding the link between microbial secondary metabolites and colorectal cancer.}, journal = {Computational biology and chemistry}, volume = {115}, number = {}, pages = {108372}, doi = {10.1016/j.compbiolchem.2025.108372}, pmid = {39923290}, issn = {1476-928X}, mesh = {*Colorectal Neoplasms/metabolism/microbiology ; Humans ; *Gastrointestinal Microbiome ; Feces/microbiology ; *Secondary Metabolism ; *Bacteria/metabolism/genetics ; }, abstract = {Colorectal cancer (CRC) is a prevalent form of cancer in humans, with the gut microbiota playing a significant role in its pathogenesis. Although previous research has primarily focused on the role of primary metabolites produced by gut microbes in CRC development, the role of secondary metabolites remains largely unexplored. Secondary metabolites are known to mediate crucial interactions between the microbiota and the host, potentially influencing CRC progression. However, their specific relationship to CRC pathogenesis is poorly understood. To address this gap, we performed a meta-analysis using fecal metagenomic data from a cohort of CRC patients and healthy controls, aiming to identify CRC-associated microbial secondary metabolite biosynthetic gene clusters (BGCs). Our findings not only provide valuable insights into the pathogenicity and carcinogenicity of CRC but also shed light on the potential mechanisms underlying its development.}, }
@article {pmid39922935, year = {2025}, author = {Das, BK and Gadnayak, A and Chakraborty, HJ and Pradhan, SP and Raut, SS and Das, SK}, title = {Exploring microbial players for metagenomic profiling of carbon cycling bacteria in sundarban mangrove soils.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {4784}, pmid = {39922935}, issn = {2045-2322}, mesh = {*Metagenomics/methods ; *Wetlands ; *Soil Microbiology ; *Bacteria/genetics/metabolism/classification ; *Carbon Cycle ; Metagenome ; Microbiota ; Carbon/metabolism ; }, abstract = {The Sundarbans, the world's largest tidal mangrove forest, acts as a crucial ecosystem for production, conservation, and the cycling of carbon and nitrogen. The study explored the hypothesis that microbial communities in mangrove ecosystems exhibit unique taxonomic and functional traits that play a vital part in carbon cycling and ecosystem resilience. Using metagenomic analysis to evaluate microbial communities in mangrove and non-mangrove environment, evaluating their composition, functional functions, and ecological relevance. The analysis revealed distinct microbial profiles, in mangrove and non-mangrove environments, with bacteria, proteobacteria, and viruses being the most prevalent groups, with varying abundances in each environment. Functional and taxonomical analysis identified genes involved in carbon regulation, including Triacylglycerol lipase, NarG, DsrB, DNA-binding transcriptional dual regulator CRP, Vanillate O-demethylase oxygenase, succinate-CoA ligase, Tetrahydrofolate ligase, Carboxylase, Ribulose-1,5-bisphosphate carboxylase/oxygenase, Glycine hydroxymethyltransferase, MAG: urease, Endosymbiont of Oligobrachia haakonmosbiensis, Ribulose bisphosphate carboxylase, Aconitate hydratase AcnA, and nitrous oxide reductase, suggesting the metabolic versatility of these microbial communities for carbon cycling. The findings emphasize the key role of microbial activity in preserving mangrove ecosystem health and resilience, highlighting the intricate interplay between microbial diversity, functional capabilities, and environmental factors.}, }
@article {pmid39922085, year = {2025}, author = {Florio, M and Crudele, L and Sallustio, F and Moschetta, A and Cariello, M and Gadaleta, RM}, title = {Disentangling the nutrition-microbiota liaison in inflammatory bowel disease.}, journal = {Molecular aspects of medicine}, volume = {102}, number = {}, pages = {101349}, doi = {10.1016/j.mam.2025.101349}, pmid = {39922085}, issn = {1872-9452}, mesh = {Humans ; *Inflammatory Bowel Diseases/microbiology/diet therapy/etiology ; *Gastrointestinal Microbiome ; Dysbiosis/microbiology ; Nutritional Status ; Diet ; Animals ; }, abstract = {Inflammatory Bowel Disease (IBD) is a set of chronic intestinal inflammatory disorders affecting the gastrointestinal (GI) tract. Beside compromised intestinal barrier function and immune hyperactivation, a common IBD feature is dysbiosis, characterized by a reduction of some strains of Firmicutes, Bacteroidetes, Actinobacteria and an increase in Proteobacteria and pathobionts. Emerging evidence points to diet and nutrition-dependent gut microbiota (GM) modulation, as etiopathogenetic factors and adjuvant therapies in IBD. Currently, no nutritional regimen shows universal efficacy, and advice are controversial, especially those involving restrictive diets potentially resulting in malnutrition. This review provides an overview of the role of macronutrients, dietary protocols and GM modulation in IBD patients. A Western-like diet contributes to an aberrant mucosal immune response to commensal bacteria and impairment of the intestinal barrier integrity, thereby triggering intestinal inflammation. Conversely, a Mediterranean nutritional pattern appears to be one of the most beneficial dietetic regimens able to restore the host intestinal physiology, by promoting eubiosis and preserving the intestinal barrier and immune function, which in turn create a virtuous cycle improving patient adherence to the pattern. Further clinical studies are warranted, to corroborate current IBD nutritional guidelines, and develop more accurate models to move forward precision nutrition and ameliorate patients' quality of life.}, }
@article {pmid39921224, year = {2025}, author = {Vieira, S and Adão, H and Vicente, CSL}, title = {Assessing spatial and temporal patterns of benthic bacterial communities in response to different sediment conditions.}, journal = {Marine environmental research}, volume = {204}, number = {}, pages = {106963}, doi = {10.1016/j.marenvres.2025.106963}, pmid = {39921224}, issn = {1879-0291}, mesh = {*Geologic Sediments/microbiology ; *Bacteria/classification/genetics ; Portugal ; Estuaries ; *Environmental Monitoring ; Ecosystem ; Biodiversity ; *Microbiota ; RNA, Ribosomal, 16S/genetics ; *Water Microbiology ; }, abstract = {Benthic bacterial communities are sensitive to habitat condition and present a fast response to environmental stressors, which makes them powerful ecological indicators of estuarine environments. The aim of this work is to study the spatial-temporal patterns of benthic bacterial communities in response to contrasting environmental conditions and assess their potential as ecological indicators of estuarine sediments. We characterized the diversity of bacterial communities in three contrasting sites on Sado Estuary (SW Coast, Portugal) and 4 sampling occasions, using 16S metagenomic approach. Based on previous studies, we hypothesized that diversity patterns of bacterial communities will be distinct between sites and across sampling occasions. Bacterial communities were more influenced by each site conditions than by temporal variations in the sediments. The main drivers of bacterial distribution were sediments' composition, organic contents, and hydrodynamic activity. This work provided an important baseline dataset from Sado estuary to explore bacterial networks concerning benthic ecosystem functioning.}, }
@article {pmid39921114, year = {2025}, author = {Farooq, S and Talat, A and Dhariwal, A and Petersen, FC and Khan, AU}, title = {Transgenerational gut dysbiosis: Unveiling the dynamics of antibiotic resistance through mobile genetic elements from mothers to infants.}, journal = {International journal of antimicrobial agents}, volume = {65}, number = {5}, pages = {107458}, doi = {10.1016/j.ijantimicag.2025.107458}, pmid = {39921114}, issn = {1872-7913}, mesh = {Humans ; Female ; Infant ; *Gastrointestinal Microbiome/genetics ; Infant, Newborn ; *Dysbiosis/microbiology ; Feces/microbiology ; Anti-Bacterial Agents/pharmacology ; Adult ; *Drug Resistance, Bacterial/genetics ; Mothers ; *Interspersed Repetitive Sequences ; Male ; *Bacteria/genetics/drug effects/isolation &amp; purification ; }, abstract = {OBJECTIVES: The initial microbial colonization of the gut is seeded by microbes transmitted from the mother's gut, skin, and vaginal tract. As the gut microbiome evolves, a few transmitted microbes persist throughout life. Understanding the impact of mother-to-neonate gut microbiome and antibiotic resistance genes (ARGs) transmission is crucial for establishing its role in infants' immunity against pathogens.<br><br>METHODS: This study primarily explores mother-neonate ARG transmission through 125 publicly available fecal metagenomes, isolated from eighteen mother-neonate pairs.<br><br>RESULTS: The core ARGs, detected in both mothers and their respective infants at all stages (birth, 1st, 2nd, 3rd, 4th, 8th and 12th months) included aminoglycosidases APH(3')-IIIa, Bifidobacterium adolescentis rpoB mutants conferring resistance to rifampicin, &#x3b2;-lactamases CblA-1, CfxA2, multidrug resistance gene CRP, diaminopyrimidine resistance gene dfrF, fluoroquinolone-resistance gene emrR, macrolide; lincosamide; streptogramin resistance gene ErmB, ErmG, macrolide resistance gene Mef(En2), nucleosidase SAT-4, and tetracycline-resistance genes tet(O), tet(Q), and tet(W). Most of these infants and mothers were not administered any antibiotics. In infants, ARGs were predominantly carried by Bacillota, Pseudomonadota, and Actinomycetota, similar to the mothers. The dominant ARG-carrying opportunistic pathogens were Escherichia coli, Klebsiella, and Streptococcus, found across all infant cohorts. All the core ARGs were associated with mobile genetic elements, signifying the role of horizontal gene transfer(HGT). We detected 132 virulence determinants, mostly E. coli-specific, including pilus chaperones, general secretion pathway proteins, type III secretion system effectors, and heme-binding proteins.<br><br>CONCLUSIONS: Maternal-neonate transmission of ARGs along with possible nosocomial infections, mode of delivery, breastfeeding versus formula feeding, and gestation period, must be considered for mother-neonate health.}, }
@article {pmid39920962, year = {2025}, author = {Wang, X and Gao, L and Wang, S and Zhang, X and Feng, R and Jia, S}, title = {Metagenomic insights into the assembly, function, and key taxa of bacterial community in full-scale pesticide wastewater treatment processes.}, journal = {Environmental research}, volume = {271}, number = {}, pages = {121037}, doi = {10.1016/j.envres.2025.121037}, pmid = {39920962}, issn = {1096-0953}, mesh = {*Wastewater/microbiology ; *Bacteria/genetics/classification ; *Pesticides ; *Waste Disposal, Fluid/methods ; *Water Pollutants, Chemical ; Metagenomics ; *Microbiota ; *Metagenome ; Biodegradation, Environmental ; }, abstract = {Pesticide wastewater emerges as a typical refractory wastewater, characterized by complex composition and high toxicity, posing significant treatment challenges. Bacterial communities are responsible for biological treatment of refractory wastewater in full-scale pesticide wastewater treatment plants (PWWTPs), providing important implications for optimizing system performance and improving management strategies. However, the knowledge of their composition, diversity, function, assembly patterns, and biological interactions remains limited. Therefore, this study applied high-throughput sequencing, machine learning models, and statistical analysis to investigate key features of bacterial communities in eight PWWTPs. We found that Proteobacteria and Bacteroidota were the most abundant phyla, with Pseudomonas, Hyphomicrobium, Comamonas, and Thauera being dominant genera. Bacterial community distribution and diversity varied significantly among influents, sludges, and effluents, with sludges and effluents exhibiting higher diversity, richness, and evenness compared to influents. Deterministic processes primarily shaped the bacterial communities, accounting for 77.12%, 61.44%, and 64.05% of variation in influents, sludges, and effluents, respectively. Homogeneous selection explained 47.71%, 31.37%, and 31.37% of variation across these communities. Key modules (Module 1 in influents, Modules 3 and 4 in sludges, and Module 1 in effluents) were significantly associated with various metabolic and degradative functions (p < 0.05). Core taxa identified by Random Forest analysis were strongly linked to key metabolic and degradation functions, such as the metabolism of cofactors and vitamins, carbohydrates, and amino acids as well as the degradation of benzoate, aminobenzoate, nitrotoluene, chloroalkane, and chloroalkene. This study deepens our understanding of bacterial community dynamics and key features in pesticide wastewater treatment systems, offering scientific guidance for process optimization, efficiency improvement, and system stability assessment.}, }
@article {pmid39920864, year = {2025}, author = {Kennedy, EA and Weagley, JS and Kim, AH and Antia, A and DeVeaux, AL and Baldridge, MT}, title = {Bacterial community assembly of specific pathogen-free neonatal mice.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {46}, pmid = {39920864}, issn = {2049-2618}, support = {F31 AI167499/AI/NIAID NIH HHS/United States ; R01AI139314/NH/NIH HHS/United States ; R01 AI139314/AI/NIAID NIH HHS/United States ; R01 AI173360/AI/NIAID NIH HHS/United States ; T32AI007163/NH/NIH HHS/United States ; F31AI167499/NH/NIH HHS/United States ; T32 AI007163/AI/NIAID NIH HHS/United States ; T32 AI007172/AI/NIAID NIH HHS/United States ; T32AI007172/NH/NIH HHS/United States ; 1065897//Crohn's and Colitis Foundation/ ; DGE-1745038//National Science Foundation/ ; }, mesh = {Animals ; Mice ; Animals, Newborn/microbiology ; Feces/microbiology ; Mice, Inbred C57BL ; *Bacteria/classification/genetics/isolation &amp; purification ; Female ; Mice, Inbred BALB C ; Specific Pathogen-Free Organisms ; *Gastrointestinal Microbiome ; Metagenomics/methods ; Metagenome ; *Microbiota ; Male ; }, abstract = {BACKGROUND: Neonatal mice are frequently used to model diseases that affect human infants. Microbial community composition has been shown to impact disease progression in these models. Despite this, the maturation of the early-life murine microbiome has not been well-characterized. We address this gap by characterizing the assembly of the bacterial microbiota of C57BL/6 and BALB/c litters from birth to adulthood across multiple independent litters.<br><br>RESULTS: The fecal microbiome of young pups is dominated by only a few pioneering bacterial taxa. These taxa are present at low levels in the microbiota of multiple maternal body sites, precluding a clear identification of maternal source. The pup microbiota begins diversifying after 14&#xa0;days, coinciding with the beginning of coprophagy and the consumption of solid foods. Pup stool bacterial community composition and diversity are not significantly different from dams from day 21 onwards. Short-read shotgun sequencing-based metagenomic profiling of young pups enabled the assembly of metagenome-assembled genomes for strain-level analysis of these pioneer Ligilactobacillus, Streptococcus, and Proteus species.<br><br>CONCLUSIONS: Assembly of the murine microbiome occurs over the first weeks of postnatal life and is largely complete by day 21. This detailed view of bacterial community development across multiple commonly employed mouse strains informs experimental design, allowing researchers to better target interventions before, during, or after the maturation of the bacterial microbiota. The source of pioneer bacterial strains appears heterogeneous, as the most abundant taxa identified in young pup stool were found at low levels across multiple maternal body sites, suggesting diverse routes for seeding of the murine microbiome. Video Abstract.}, }
@article {pmid39919372, year = {2025}, author = {Swain, S and Sahoo, P and Biswal, S and Sethy, K and Panda, AN and Sahoo, N}, title = {Fecal bacterial microbiota diversity characterized for dogs with atopic dermatitis: its alteration and clinical recovery after meat-exclusion diet.}, journal = {American journal of veterinary research}, volume = {86}, number = {5}, pages = {}, doi = {10.2460/ajvr.24.09.0274}, pmid = {39919372}, issn = {1943-5681}, mesh = {Animals ; *Dermatitis, Atopic/veterinary/microbiology/diet therapy ; Dogs ; *Feces/microbiology ; *Gastrointestinal Microbiome ; *Diet/veterinary ; *Dog Diseases/microbiology/diet therapy ; Animal Feed/analysis ; Female ; Meat ; Male ; RNA, Ribosomal, 16S ; Bacteria/classification/isolation &amp; purification ; India ; }, abstract = {OBJECTIVE: To achieve clinical recovery in canine atopic dermatitis affected pet dogs via alteration of the gut microbiome, following a meat and egg exclusion diet for 60 days.<br><br>METHODS: 24 atopic dermatitis-affected pet dogs, all fed poultry meat and egg, and another 48 apparently healthy controls fed both poultry meat and egg (n = 24) or vegetable diet (24) were included in the study. The study was undertaken in the Bhubaneswar Smart City, Odisha, India, from July to December 2023. Fecal samples were collected at 2 points for DNA analysis, ie, on day 0 and day 60 of the change from a meat/egg-based diet to a vegetable-based diet. Extracted DNA samples were pooled category-wise and subjected to the gut microbiome analysis in the Nanopore sequencer targeting the 16S rRNA gene. Burrows-Wheeler Transform, Ferragina-Manzini index, and Krona charts were used for taxonomical classification and visualization of relative abundances of bacterial species within the metagenome. Alpha- and beta-diversity analyses were performed.<br><br>RESULTS: Atopic pets at day 0 showed elevation in the gut microbiome population with an adequate concentration of pathogens like Escherichia coli and Clostridiodes difficile with lower amounts of the beneficial bacteria like Lactobacillus sp, while the pets at 60 days after dietary intervention showed a significant decline in bacterial species like E coli and C difficile with higher amount of Lactobacillus sp. Both control groups showed variations of microbiome between them as well as from the atopic pets.<br><br>CONCLUSIONS: We found a close association of poultry meat/egg diet with gut microbiome population and atopic symptoms as well in dogs, and elimination of such diet could be helpful in clinical recovery.<br><br>CLINICAL RELEVANCE: Dietary intervention with the exclusion of potential allergens from poultry meat and egg sources can be an effective approach for the management of canine atopic dermatitis.}, }
@article {pmid39919360, year = {2025}, author = {Lemons, JMS and Narrowe, AB and Firrman, J and Mahalak, KK and Liu, L and Higgins, S and Moustafa, AM and Baudot, A and Deyaert, S and Van den Abbeele, P}, title = {The food additive butylated hydroxyanisole minimally affects the human gut microbiome ex vivo.}, journal = {Food chemistry}, volume = {473}, number = {}, pages = {143037}, doi = {10.1016/j.foodchem.2025.143037}, pmid = {39919360}, issn = {1873-7072}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Bacteria/genetics/isolation &amp; purification/classification/drug effects/metabolism ; Aged ; Adult ; Male ; *Food Additives/pharmacology ; Middle Aged ; *Butylated Hydroxyanisole/pharmacology ; Female ; Infant ; Child, Preschool ; Child ; Young Adult ; Adolescent ; }, abstract = {Butylated hydroxyanisole (BHA) continues to raise consumer concerns. All previous evaluations of this additive have failed to consider its effect on the gut microbiome, even though it enters the colon. An ex vivo model was used to assess the effect of BHA on microbial communities from 24 donors, aged infants to older adults. A dose of 0.35 g/L BHA elicited no statistically significant changes in the functional outputs or community structure for any age group. Although not large enough to affect community diversity, there were some significant decreases at the phylum level. Among the genes most significantly affected by treatment with BHA across age groups are those involved in lipopolysaccharide synthesis and bacterial electron transport encoded by Bacteroidota, Proteobacteria, and Verrucomicrobiota. Given what is known about the intracellular activity of BHA, these genes may hint at a mechanism behind BHA's evident, but minimally detrimental effect on the gut microbiota.}, }
@article {pmid39917835, year = {2025}, author = {Hoffbeck, C and Middleton, DMRL and Wallbank, JA and Boey, JS and Taylor, MW}, title = {Culture-Independent Species-Level Taxonomic and Functional Characterisation of Bacteroides, the Core Bacterial Genus Within Reptile Guts.}, journal = {Molecular ecology}, volume = {34}, number = {6}, pages = {e17685}, pmid = {39917835}, issn = {1365-294X}, support = {//University of Auckland Doctoral Scholarship/ ; }, mesh = {Animals ; *Reptiles/microbiology ; *Bacteroides/genetics/classification ; RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome/genetics ; Phylogeny ; Metagenome ; Metagenomics ; }, abstract = {The genus Bacteroides is a widespread and abundant bacterial taxon associated with gut microbiotas. Species within Bacteroides fill many niches, including as mutualists, commensals and pathogens for their hosts. Within many reptiles, Bacteroides is a dominant, 'core' gut bacterium that sometimes exhibits increased abundance in times of food scarcity, such as during hibernation. Here, we take a two-pronged approach to better characterise Bacteroides populations in reptile guts. Firstly, we leverage published 16S rRNA gene sequence datasets to determine the species-level distributions of Bacteroides members in reptile hosts. Secondly, we mine publicly available metagenomes to extract data for Bacteroides from reptiles, birds, amphibians and mammals, to compare the functional potential of Bacteroides in different host taxa. The 16S rRNA gene analyses revealed that B. acidifaciens is the most common Bacteroides species in reptile guts, and that different orders of reptiles differ in which Bacteroides species they harbour. The taxonomy of Bacteroides species recovered from metagenomic assembly did not differ between reptile orders or substantially across birds, amphibians and mammals. Metagenome-assembled genomes for Bacteroides species were marginally more related when their hosts were more closely related, with reptile hosts in particular harbouring markedly more unique Bacteroides MAGs compared to other hosts. Our findings indicate that hosts harbour similar profiles of Bacteroides species across broad comparisons, but with some differences between reptile groups, and that Bacteroides appears to perform largely similar roles in vertebrate host guts regardless of host relatedness.}, }
@article {pmid39916938, year = {2024}, author = {Liu, Y and Yang, B and Qi, Q and Liu, S and Du, Y and Ye, L and Zhou, Q}, title = {Metagenomic next-generation sequencing for lung cancer low respiratory tract infections diagnosis and characterizing microbiome features.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1518199}, pmid = {39916938}, issn = {2235-2988}, mesh = {Humans ; *Lung Neoplasms/complications/microbiology ; *High-Throughput Nucleotide Sequencing/methods ; *Microbiota/genetics ; *Respiratory Tract Infections/diagnosis/microbiology ; *Metagenomics/methods ; Male ; Female ; Middle Aged ; Bacteria/classification/genetics/isolation &amp; purification ; Aged ; Sputum/microbiology ; Fungi/isolation &amp; purification/genetics/classification ; Coinfection/microbiology/diagnosis ; }, abstract = {BACKGROUND: The capability of mNGS in diagnosing suspected LRTIs and characterizing the respiratory microbiome in lung cancer patients requires further evaluation.<br><br>METHODS: This study evaluated mNGS diagnostic performance and utilized background microbial sequences to characterize LRT microbiome in these patients. GSVA was used to analyze the potential functions of identified genera.<br><br>RESULTS: Bacteria were the most common pathogens (n=74) in LRTIs of lung cancer patients, and polymicrobial infections predominated compared to monomicrobial infections (p<0.001). In diagnosing LRTIs in lung cancer patients, the pathogen detection rate of mNGS (83.3%, 70/84) was significantly higher than that of sputum culture (34.5%, 29/84) (p<0.001). This result was consistent with that of non-lung cancer patients (p<0.001). Furthermore, in the specific detection of bacteria (95.7% vs. 22.6%) and fungi (96.0% vs. 22.2%), the detection rate of mNGS was also significantly higher than that of CMTs mainly based on culture (p<0.001, p<0.001). However, in the detection of CMV/EBV viruses, there was no significant difference between the detection rate of mNGS and that of viral DNA quantification (p = 1.000 and 0.152). mNGS analysis revealed Prevotella, Streptococcus, Veillonella, Rothia, and Capnocytophaga as the most prevalent genera in the LRT of lung cancer patients. GSVA revealed significant correlations between these genera and tumor metabolic pathways as well as various signaling pathways including PI3K, Hippo, and p53.<br><br>CONCLUSION: mNGS showed a higher pathogen detection rate than culture-based CMTs in lung cancer patients with LRTIs, and also characterizing LRT microbiome composition and revealing potential microbial functions linked to lung carcinogenesis.}, }
@article {pmid39915809, year = {2025}, author = {Zhang, Y and Li, HZ and Breed, M and Tang, Z and Cui, L and Zhu, YG and Sun, X}, title = {Soil warming increases the active antibiotic resistome in the gut of invasive giant African snails.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {42}, pmid = {39915809}, issn = {2049-2618}, support = {2022T150635//fellowship of China Postdoctoral Science Foundation/ ; 42407166//National Natural Science Foundation of China/ ; 42307165//National Natural Science Foundation of China/ ; 32361143523//National Natural Science Foundation of China/ ; 2021-DST-004//Ningbo S&amp;T project/ ; 2023YFF1304601//National Key Research and Development Program of China/ ; 322GJHZ2022028FN//International Partnership Program of Chinese Academy of Sciences/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics/drug effects ; *Global Warming ; *Snails/microbiology ; *Soil/chemistry ; Soil Microbiology ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Anti-Bacterial Agents/pharmacology ; Metagenomics/methods ; *Drug Resistance, Bacterial/genetics ; Metagenome ; beta-Lactamases/genetics ; }, abstract = {BACKGROUND: Global warming is redrawing the map for invasive species, spotlighting the globally harmful giant African snail as a major ecological disruptor and public health threat. Known for harboring extensive antibiotic resistance genes (ARGs) and human pathogens, it remains uncertain whether global warming exacerbates these associated health risks.<br><br>METHODS: We use phenotype-based single-cell Raman with D2O labeling (Raman-D2O) and genotype-based metagenomic sequencing to investigate whether soil warming increases active antibiotic-resistant bacteria (ARBs) in the gut microbiome of giant African snails.<br><br>RESULTS: We show a significant increase in beta-lactam phenotypic resistance of active ARBs with rising soil temperatures, mirrored by a surge in beta-lactamase genes such as SHV, TEM, OCH, OKP, and LEN subtypes. Through a correlation analysis between the abundance of phenotypically active ARBs and genotypically ARG-carrying gut microbes, we identify species that contribute to the increased activity of antibiotic resistome under soil warming. Among 299 high-quality ARG-carrying metagenome-assembled genomes (MAGs), we further revealed that the soil warming enhances the abundance of "supercarriers" including human pathogens with multiple ARGs and virulence factors. Furthermore, we identified elevated biosynthetic gene clusters (BGCs) within these ARG-carrying MAGs, with a third encoding at least one BGC. This suggests a link between active ARBs and secondary metabolism, enhancing the environmental adaptability and competitive advantage of these organisms in warmer environments.<br><br>CONCLUSIONS: The study underscores the complex interactions between soil warming and antibiotic resistance in the gut microbiome of the giant African snail, highlighting a potential escalation in environmental health risks due to global warming. These findings emphasize the urgent need for integrated environmental and health strategies to manage the rising threat of antibiotic resistance in the context of global climate change. Video Abstract.}, }
@article {pmid39915243, year = {2025}, author = {Zhao, S and Lin, H and Li, W and Xu, X and Wu, Q and Wang, Z and Shi, J and Chen, Y and Ye, L and Xi, L and Chen, L and Yuan, M and Su, J and Gao, A and Jin, J and Ying, X and Wang, X and Ye, Y and Sun, Y and Zhang, Y and Deng, X and Shen, B and Gu, W and Ning, G and Wang, W and Hong, J and Wang, J and Liu, R}, title = {Post sleeve gastrectomy-enriched gut commensal Clostridia promotes secondary bile acid increase and weight loss.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2462261}, pmid = {39915243}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome/physiology ; Animals ; *Bile Acids and Salts/metabolism ; *Weight Loss ; Humans ; Mice ; *Clostridium/genetics/metabolism/isolation &amp; purification/classification ; *Gastrectomy ; Male ; *Obesity/surgery/microbiology/metabolism ; Receptors, G-Protein-Coupled/metabolism/genetics ; Fecal Microbiota Transplantation ; Mice, Inbred C57BL ; Feces/microbiology ; Female ; Adult ; Bariatric Surgery ; }, abstract = {The gut microbiome is altered after bariatric surgery and is associated with weight loss. However, the commensal bacteria involved and the underlying mechanism remain to be determined. We performed shotgun metagenomic sequencing in obese subjects before and longitudinally after sleeve gastrectomy (SG), and found a significant enrichment in microbial species in Clostridia and bile acid metabolizing genes after SG treatment. Bile acid profiling further revealed decreased primary bile acids (PBAs) and increased conjugated secondary bile acids (C-SBAs) after SG. Specifically, glycodeoxycholic acid (GDCA) and taurodeoxycholic acid (TDCA) were increased at different follow-ups after SG, and were associated with the increased abundance of Clostridia and body weight reduction. Fecal microbiome transplantation with post-SG feces increased SBA levels, and alleviated body weight gain in the recipient mice. Furthermore, both Clostridia-enriched spore-forming bacteria and GDCA supplementation increased the expression of genes responsible for lipolysis and fatty acid oxidation in adipose tissue and reduced adiposity via Takeda G-protein-coupled receptor 5 (TGR5) signaling. Our findings reveal post-SG gut microbiome and C-SBAs as contributory to SG-induced weight loss, in part via TGR5 signaling, and suggest SBA-producing gut microbes as a potential therapeutic target for obesity intervention.}, }
@article {pmid39914332, year = {2025}, author = {Rossi, M and Vergara, A and Troisi, R and Alberico, M and Carraturo, F and Salamone, M and Giordano, S and Capozzi, F and Spagnuolo, V and de Magistris, FA and Donadio, C and Scognamiglio, V and Vedi, V and Guida, M}, title = {Microplastics, microfibers and associated microbiota biofilm analysis in seawater, a case study from the Vesuvian Coast, southern Italy.}, journal = {Journal of hazardous materials}, volume = {488}, number = {}, pages = {137468}, doi = {10.1016/j.jhazmat.2025.137468}, pmid = {39914332}, issn = {1873-3336}, mesh = {*Microplastics/analysis ; Italy ; *Seawater/microbiology/chemistry ; *Biofilms ; *Microbiota ; *Water Pollutants, Chemical/analysis ; Environmental Monitoring/methods ; Bacteria/genetics ; }, abstract = {The growing concerns regarding pollution from microplastics (MPs) and microfibers (MFs) have driven the scientific community to develop new solutions for monitoring ecosystems. However, many of the proposed technologies still include protocols for treating environmental samples that may alter plastic materials, leading to inaccurate results both in observation and in counting. For this reason, we are refining a protocol, based on optical microscopy without the use of pretreatments, applicable to different environmental matrices, which allows not only counting but also a complete morphological characterization of MPs and MFs. Previously, the protocol has successfully been tested on marine sediments from the Vesuvian area of the Gulf of Naples (Italy) with good results. In the present study, we tested the protocol on MPs and MFs in seawater samples collected from the same geographical area to provide a comprehensive overview of their distribution in the marine environments. The protocol enabled not only the morphological characterization of MPs and MFs but also the collection of information on the colonies of microorganisms present on the microparticles. Next Generation Sequencing (NGS) metagenomic technologies enabled us to characterize the microbiota composition of the sampled MPs, the so-called Plastisphere. The analytical approach allowed the characterization of several potentially pathogenic bacteria, which represent a potential threat to the environment and human health. In fact, they may exploit their ability to form biofilms on plastics to proliferate in marine ecosystems.}, }
@article {pmid39912643, year = {2025}, author = {Hotchkiss, MZ and Poulain, AJ and Forrest, JRK}, title = {Bumble bee gut microbial community structure differs between species and commercial suppliers, but metabolic potential remains largely consistent.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {3}, pages = {e0203624}, pmid = {39912643}, issn = {1098-5336}, support = {//Canadian Government | Natural Sciences and Engineering Research Council of Canada (NSERC)/ ; }, mesh = {Bees/microbiology ; Animals ; *Gastrointestinal Microbiome ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Metagenomics ; }, abstract = {Bumble bees are key pollinators for natural and agricultural plant communities. Their health and performance are supported by a core gut microbiota composed of a few bacterial taxa. However, the taxonomic composition and community structure of bumble bee gut microbiotas can vary with bee species, environment, and origin (i.e., whether colonies come from the wild or a commercial rearing facility), and it is unclear whether metabolic capabilities therefore vary as well. Here we used metagenomic sequencing to examine gut microbiota community composition, structure, and metabolic potential across bumble bees from two different commercial Bombus impatiens suppliers, wild B. impatiens, and three other wild bumble bee species sampled from sites within the native range of all four species. We found that the community structure of gut microbiotas varied between bumble bee species, between populations from different origins within species, and between commercial suppliers. Notably, we found that Apibacter is consistently present in some wild bumble bee species-suggesting it may be a previously unrecognized core phylotype of bumble bees-and that commercial B. impatiens colonies can lack core phylotypes consistently found in wild populations. However, despite variation in community structure, the high-level metabolic potential of gut microbiotas was largely consistent across all hosts, including for metabolic capabilities related to host performance, though metabolic activity remains to be investigated.IMPORTANCEOur study is the first to compare genome-level taxonomic structure and metabolic potential of whole bumble bee gut microbiotas between commercial suppliers and between commercial and wild populations. In addition, we profiled the full gut microbiotas of three wild bumble bee species for the first time. Overall, our results provide new insight into bumble bee gut microbiota community structure and function and will help researchers evaluate how well studies conducted in one bumble bee population will translate to other populations and species. Research on taxonomic and metabolic variation in bumble bee gut microbiotas across species and origins is of increasing relevance as we continue to discover new ways that social bee gut microbiotas influence host health, and as some bumble bee species decline in range and abundance.}, }
@article {pmid39910065, year = {2025}, author = {Fumagalli, A and Castells-Nobau, A and Trivedi, D and Garre-Olmo, J and Puig, J and Ramos, R and Ramió-Torrentà, L and Pérez-Brocal, V and Moya, A and Swann, J and Martin-Garcia, E and Maldonado, R and Fernández-Real, JM and Mayneris-Perxachs, J}, title = {Archaea methanogens are associated with cognitive performance through the shaping of gut microbiota, butyrate and histidine metabolism.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2455506}, pmid = {39910065}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome/physiology ; *Cognition/physiology ; *Histidine/metabolism ; Male ; Humans ; Female ; *Butyrates/metabolism ; Bacteria/classification/metabolism/genetics/isolation &amp; purification ; *Archaea/metabolism/classification/genetics ; Aged ; Middle Aged ; Cohort Studies ; Metagenomics ; }, abstract = {The relationship between bacteria, cognitive function and obesity is well established, yet the role of archaeal species remains underexplored. We used shotgun metagenomics and neuropsychological tests to identify microbial species associated with cognition in a discovery cohort (IRONMET, n = 125). Interestingly, methanogen archaeas exhibited the strongest positive associations with cognition, particularly Methanobrevibacter smithii (M. smithii). Stratifying individuals by median-centered log ratios (CLR) of M. smithii (low and high M. smithii groups: LMs and HMs) revealed that HMs exhibited better cognition and distinct gut bacterial profiles (PERMANOVA p = 0.001), characterized by increased levels of Verrucomicrobia, Synergistetes and Lentisphaerae species and reduced levels of Bacteroidetes and Proteobacteria. Several of these species were linked to the cognitive test scores. These findings were replicated in a large-scale validation cohort (Aging Imageomics, n = 942). Functional analyses revealed an enrichment of energy, butyrate, and bile acid metabolism in HMs in both cohorts. Global plasma metabolomics by CIL LC-MS in IRONMET identified an enrichment of methylhistidine, phenylacetate, alpha-linolenic and linoleic acid, and secondary bile acid metabolism associated with increased levels of 3-methylhistidine, phenylacetylgluamine, adrenic acid, and isolithocholic acid in the HMs group. Phenylacetate and linoleic acid metabolism also emerged in the Aging Imageomics cohort performing untargeted HPLC-ESI-MS/MS metabolic profiling, while a targeted bile acid profiling identified again isolithocholic acid as one of the most significant bile acid increased in the HMs. 3-Methylhistidine levels were also associated with intense physical activity in a second validation cohort (IRONMET-CGM, n = 116). Finally, FMT from HMs donors improved cognitive flexibility, reduced weight, and altered SCFAs, histidine-, linoleic acid- and phenylalanine-related metabolites in the dorsal striatum of recipient mice. M. smithii seems to interact with the bacterial ecosystem affecting butyrate, histidine, phenylalanine, and linoleic acid metabolism with a positive impact on cognition, constituting a promising therapeutic target to enhance cognitive performance, especially in subjects with obesity.}, }
@article {pmid39909332, year = {2025}, author = {Cheng, Z and He, Y and Wang, N and Wu, L and Xu, J and Shi, J}, title = {Uncovering soil amendment-induced genomic and functional divergence in soybean rhizosphere microbiomes during cadmium-contaminated soil remediation: Novel insights from field multi-omics.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {368}, number = {}, pages = {125787}, doi = {10.1016/j.envpol.2025.125787}, pmid = {39909332}, issn = {1873-6424}, mesh = {*Cadmium/analysis ; *Rhizosphere ; *Soil Pollutants/analysis ; *Glycine max/microbiology ; *Soil Microbiology ; *Microbiota ; Soil/chemistry ; Biodegradation, Environmental ; *Environmental Restoration and Remediation/methods ; Multiomics ; }, abstract = {Soil amendments exhibit great potential in reducing cadmium (Cd) bioavailability and its accumulation in crop grains, but their practical implications on microbial characteristics (genomic traits and ecological functions) remain unclear. The objective of this study was to combine metagenomics and metatranscriptomics to track the dynamics of bacterial and viral communities in the soybean rhizosphere during the remediation of Cd-contaminated soil using a commercial Mg-Ca-Si conditioner (CMC), applied at low and high (975 kg ha[-1] and 1950 kg ha[-1]) rates under field conditions. Application of CMC increased the average size and decreased the guanine-cytosine (GC) content of microbial genomes, which were strongly shaped by soil pH and available Cd (ACd). Gene and transcript abundances analysis indicated that CMC promoted the enrichment of Alphaproteobacterial metagenome-assembled genomes (MAGs) carrying czcC gene encoding Cd efflux and dsbB gene encoding disulfide bond oxidoreductase. These genes are closely related to Cd resistance and exhibited notable (p < 0.05) increased expression in CMC-treated soils. Additionally, low and high CMC addition significantly increased viral alpha diversity by 5.7% and 9.6%, and viral activity by 3.3% and 7.8%, respectively, in comparison to the control. Temperate viruses were predicted as the major group (64%) and actively linked to the dominant host, and CMC amendment increased host metabolism and adaptability by enhancing (p < 0.05) the abundance and transcriptional activity of virus-encoded auxiliary metabolic genes (AMGs) involved in heavy metal resistance (ABC transport), sulfur cycling (cysH), and host metabolism (galE and queD) through "piggyback-the-winner" strategy. Structural equation modeling further revealed that CMC application influences Cd accumulation in soybean grains through its direct and indirect effects on soil properties and rhizosphere microbiomes, and highlighted the potential role of rhizosphere viruses in agricultural soil remediation.}, }
@article {pmid39909254, year = {2025}, author = {Yan, Q and Wang, W and Fan, Z and Wei, Y and Yu, R and Pan, T and Wang, N and Lu, W and Li, B and Fang, Z}, title = {Chickpea-resistant starch exhibits bioactive function for alleviating atopic dermatitis via regulating butyrate production.}, journal = {International journal of biological macromolecules}, volume = {303}, number = {}, pages = {140661}, doi = {10.1016/j.ijbiomac.2025.140661}, pmid = {39909254}, issn = {1879-0003}, mesh = {*Cicer/chemistry ; Animals ; Mice ; *Dermatitis, Atopic/drug therapy/metabolism/microbiology/pathology ; *Butyrates/metabolism ; Gastrointestinal Microbiome/drug effects ; *Starch/chemistry/pharmacology ; Receptors, G-Protein-Coupled/metabolism ; *Resistant Starch/pharmacology ; Disease Models, Animal ; Fatty Acids, Volatile ; }, abstract = {Resistant starch (RS) is one of the bioactive polysaccharides to produce Short-chain fatty acids (SCFAs) in the colon and contributes to allergic diseases including atopic dermatitis (AD). However, the bioactive mechanism of RS relieving AD needs to be elucidated. In this study, RS was prepared using chickpeas. Its microstructure and crystal structure were thoroughly characterized. Chickpea RS significantly improved the clinical symptoms and restored Th1/Th2 immune balance in mice with AD induced by calcipotriol. These benefits were eliminated by antibiotic cocktail treatment, suggesting that gut microbiota mediated the alleviation effects of chickpea RS on AD. Based on metagenomic sequencing and untargeted metabolomic analysis, chickpea RS treatment significantly increased the proportions of Butyricimonas virosa, Bifidobacterium pseudolongum, and Faecalibaculum rodentium, and a total of 206 differential metabolites were altered, especially the increase in propionate and butyrate production. Furthermore, we found that acylated butyrate, but not propionate, improved the pathological characteristics by activating GPR109A, which inhibit the phosphorylation levels of IκB-α, p50, p65, JNK, and p-JNK. Collectively, chickpea RS exhibited the bioactive function for regulating the communication of the gut-skin axis via regulating butyrate production to activate GPR109A.}, }
@article {pmid39909037, year = {2025}, author = {Lim, B and Xu, J and Wierzbicki, IH and Gonzalez, CG and Chen, Z and Gonzalez, DJ and Gao, X and Goodman, AL}, title = {A human gut bacterium antagonizes neighboring bacteria by altering their protein-folding ability.}, journal = {Cell host &amp; microbe}, volume = {33}, number = {2}, pages = {200-217.e24}, pmid = {39909037}, issn = {1934-6069}, support = {K12 GM068524/GM/NIGMS NIH HHS/United States ; R01 DK131005/DK/NIDDK NIH HHS/United States ; R01 DK133798/DK/NIDDK NIH HHS/United States ; R35 GM118159/GM/NIGMS NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Protein Folding ; *Bacterial Proteins/metabolism/genetics ; *Bacteroides/metabolism/genetics/physiology ; Molecular Chaperones/metabolism ; Animals ; Gastrointestinal Tract/microbiology ; }, abstract = {Antagonistic interactions play a key role in determining microbial community dynamics. Here, we report that one of the most widespread contact-dependent effectors in human gut microbiomes, Bte1, directly targets the PpiD-YfgM periplasmic chaperone complex in related microbes. Structural, biochemical, and genetic characterization of this interaction reveals that Bte1 reverses the activity of the chaperone complex, promoting substrate aggregation and toxicity. Using Bacteroides, we show that Bte1 is active in the mammalian gut, conferring a fitness advantage to expressing strains. Recipient cells targeted by Bte1 exhibit sensitivity to membrane-compromising conditions, and human gut microbes can use this effector to exploit pathogen-induced inflammation in the gut. Further, Bte1 allelic variation in gut metagenomes provides evidence for an arms race between Bte1-encoding and immunity-encoding strains in humans. Together, these studies demonstrate that human gut microbes alter the protein-folding capacity of neighboring cells and suggest strategies for manipulating community dynamics.}, }
@article {pmid39909032, year = {2025}, author = {Zhu, X and Hu, M and Huang, X and Li, L and Lin, X and Shao, X and Li, J and Du, X and Zhang, X and Sun, R and Tong, T and Ma, Y and Ning, L and Jiang, Y and Zhang, Y and Shao, Y and Wang, Z and Zhou, Y and Ding, J and Zhao, Y and Xuan, B and Zhang, H and Zhang, Y and Hong, J and Fang, JY and Xiao, X and Shen, B and He, S and Chen, H}, title = {Interplay between gut microbial communities and metabolites modulates pan-cancer immunotherapy responses.}, journal = {Cell metabolism}, volume = {37}, number = {4}, pages = {806-823.e6}, doi = {10.1016/j.cmet.2024.12.013}, pmid = {39909032}, issn = {1932-7420}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Immunotherapy/methods ; *Neoplasms/therapy/metabolism/microbiology/immunology ; Metabolome ; Female ; Male ; Immune Checkpoint Inhibitors/therapeutic use ; Middle Aged ; Aged ; }, abstract = {Immune checkpoint blockade (ICB) therapy has revolutionized cancer treatment but remains effective in only a subset of patients. Emerging evidence suggests that the gut microbiome and its metabolites critically influence ICB efficacy. In this study, we performed a multi-omics analysis of fecal microbiomes and metabolomes from 165 patients undergoing anti-programmed cell death protein 1 (PD-1)/programmed death ligand 1 (PD-L1) therapy, identifying microbial and metabolic entities associated with treatment response. Integration of data from four public metagenomic datasets (n = 568) uncovered cross-cohort microbial and metabolic signatures, validated in an independent cohort (n = 138). An integrated predictive model incorporating these features demonstrated robust performance. Notably, we characterized five response-associated enterotypes, each linked to specific bacterial taxa and metabolites. Among these, the metabolite phenylacetylglutamine (PAGln) was negatively correlated with response and shown to attenuate anti-PD-1 efficacy in vivo. This study sheds light on the interplay among the gut microbiome, the gut metabolome, and immunotherapy response, identifying potential biomarkers to improve treatment outcomes.}, }
@article {pmid39908950, year = {2025}, author = {Alonso-Vásquez, T and Fagorzi, C and Mengoni, A and Oliva, M and Cavalieri, D and Pretti, C and Cangioli, L and Bacci, G and Ugolini, A}, title = {Metagenomic surveys show a widespread diffusion of antibiotic resistance genes in a transect from urbanized to marine protected area.}, journal = {Marine pollution bulletin}, volume = {213}, number = {}, pages = {117640}, doi = {10.1016/j.marpolbul.2025.117640}, pmid = {39908950}, issn = {1879-3363}, mesh = {*Drug Resistance, Microbial/genetics ; Italy ; Metagenomics ; Bacteria/genetics ; Geologic Sediments/microbiology ; RNA, Ribosomal, 16S/genetics ; *Environmental Monitoring ; *Metagenome ; Microbiota ; Urbanization ; }, abstract = {Ports are hot spots of pollution; they receive pollution from land-based sources, marine traffic and port infrastructures. Marine ecosystems of nearby areas can be strongly affected by pollution from port-related activities. Here, we investigated the microbiomes present in sea floor sediments along a transect from the harbour of Livorno (Central Italy) to a nearby marine protected area. Results of 16S rRNA amplicon sequencing and metagenome assembled genomes (MAGs) analyses indicated the presence of different trends of specific bacterial groups (e.g. phyla NB1-j, Acidobacteriota and Desulfobulbales) along the transect, correlating with the measured pollution levels. Human pathogenic bacteria and antibiotic resistance genes (ARGs) were also found. These results demonstrate a pervasive impact of human port activities and highlight the importance of microbiological surveillance of marine sediments, which may constitute a reservoir of ARGs and pathogenic bacteria.}, }
@article {pmid39908385, year = {2025}, author = {Griffiths, ME and Broos, A and Morales, J and Tu, IT and Bergner, L and Behdenna, A and Valderrama Bazan, W and Tello, C and Carrera, JE and Recuenco, S and Streicker, DG and Viana, M}, title = {Dynamics of influenza transmission in vampire bats revealed by longitudinal monitoring and a large-scale anthropogenic perturbation.}, journal = {Science advances}, volume = {11}, number = {6}, pages = {eads1267}, pmid = {39908385}, issn = {2375-2548}, support = {/WT_/Wellcome Trust/United Kingdom ; }, mesh = {*Chiroptera/virology ; Animals ; *Orthomyxoviridae Infections/transmission/virology/veterinary/epidemiology ; Peru/epidemiology ; Bayes Theorem ; Humans ; *Influenza, Human/transmission/virology ; }, abstract = {Interrupting pathogen transmission between species is a priority strategy to mitigate zoonotic threats. However, avoiding counterproductive interventions requires knowing animal reservoirs of infection and the dynamics of transmission within them, neither of which are easily ascertained from the cross-sectional surveys that now dominate investigations into newly discovered viruses. We used biobanked sera and metagenomic data to reconstruct the transmission of recently discovered bat-associated influenza virus (BIV; H18N11) over 12 years in three zones of Peru. Mechanistic models fit under a Bayesian framework, which enabled joint inference from serological and molecular data, showed that common vampire bats maintain BIV independently of the now assumed fruit bat reservoir through immune waning and seasonal transmission pulses. A large-scale vampire bat cull targeting rabies incidentally halved BIV transmission, confirming vampire bats as maintenance hosts. Our results show how combining field studies, perturbation responses, and multi-data-type models can elucidate pathogen dynamics in nature and reveal pathogen-dependent effects of interventions.}, }
@article {pmid39908139, year = {2025}, author = {Zhang, Z and Guo, Q and Yang, Z and Sun, Y and Jiang, S and He, Y and Li, J and Zhang, J}, title = {Bifidobacterium adolescentis-derived nicotinic acid improves host skeletal muscle mitochondrial function to ameliorate sarcopenia.}, journal = {Cell reports}, volume = {44}, number = {2}, pages = {115265}, doi = {10.1016/j.celrep.2025.115265}, pmid = {39908139}, issn = {2211-1247}, mesh = {*Sarcopenia/metabolism/microbiology/pathology/drug therapy ; Animals ; *Niacin/pharmacology/metabolism ; *Muscle, Skeletal/metabolism/drug effects/pathology ; Mice ; Humans ; Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism ; Male ; NAD/metabolism ; Mice, Inbred C57BL ; Gastrointestinal Microbiome ; *Mitochondria/metabolism/drug effects ; *Bifidobacterium/metabolism ; *Mitochondria, Muscle/metabolism/drug effects ; Sirtuin 1/metabolism ; Female ; }, abstract = {Sarcopenia significantly diminishes quality of life and increases mortality risk in older adults. While the connection between the gut microbiome and muscle health is recognized, the underlying mechanisms are poorly understood. In this study, shotgun metagenomics revealed that Bifidobacterium adolescentis is notably depleted in individuals with sarcopenia, correlating with reduced muscle mass and function. This finding was validated in aged mice. Metabolomics analysis identified nicotinic acid as a key metabolite produced by B. adolescentis, linked to improvements in muscle mass and functionality in individuals with sarcopenia. Mechanistically, nicotinic acid restores nicotinamide adenine dinucleotide (NAD+) levels in muscle, inhibits the FoxO3/Atrogin-1/Murf-1 axis, and promotes satellite cell proliferation, reducing muscle atrophy. Additionally, NAD+ activation enhances the silent-information-regulator 1 (SIRT1)/peroxisome-proliferator-activated-receptor-γ-coactivator 1-alpha (PGC-1α) axis, stimulating mitochondrial biogenesis and promoting oxidative metabolism in slow-twitch fibers, ultimately improving muscle function. Our findings suggest that B. adolescentis-derived nicotinic acid could be a promising therapeutic strategy for individuals with sarcopenia.}, }
@article {pmid39907343, year = {2025}, author = {Alifia, L and Zulaika, E and Soeprijanto, S and Hamzah, A and Luqman, A}, title = {Microbial diversity and biotechnological potential of mangrove leaf litter in Kebun Raya Mangrove, Surabaya, Indonesia.}, journal = {Brazilian journal of biology = Revista brasleira de biologia}, volume = {84}, number = {}, pages = {e288968}, doi = {10.1590/1519-6984.288968}, pmid = {39907343}, issn = {1678-4375}, mesh = {Indonesia ; *Plant Leaves/microbiology ; *Avicennia/microbiology ; *Rhizophoraceae/microbiology ; *Wetlands ; *Bacteria/classification/genetics ; Biodiversity ; *Microbiota/genetics ; }, abstract = {Mangrove ecosystems play a crucial role in maintaining ecological balance with leaf litter serving as an important substrate for diverse microbial communities. This study investigates the microbial communities inhabiting leaf litter from four different mangrove species: Rhizophora apiculata, Rhizophora stylosa, Sonneratia caseolaris, and Avicennia marina collected from Kebun Raya Mangrove, Surabaya, Indonesia. Using metagenomic sequencing, we revealed that Proteobacteria were predominant, followed by Chlorobi and Actinobacteria in the samples. Interestingly, we detected notable populations of anaerobic bacteria, including genus of Chlorobaculum and Allochromatium. Metagenomic analyses exhibited high levels of adaptation to stressors, evidenced by the prevalence of genes conferring resistance to antibiotics (e.g., beta-lactams, tetracyclines), heavy metals (e.g., chromium, arsenic), and hydrocarbons. Furthermore, the metagenomic analysis revealed the presence of genes involved in the biosynthesis of polyunsaturated fatty acids (PUFAs), antimicrobial compounds, and plant growth-promoting activities. These findings highlight the potential of mangrove leaf litter as a reservoir of beneficial microbes with diverse biotechnological applications, including bioremediation, nutraceuticals, pharmaceuticals, and agriculture.}, }
@article {pmid39906212, year = {2024}, author = {Xi, Z and Chen, J and Wang, L and Lu, A}, title = {Characteristics of lower respiratory microbiota in children's refractory Mycoplasma pneumoniae pneumonia pre- and post-COVID-19 era.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1438777}, pmid = {39906212}, issn = {2235-2988}, mesh = {Humans ; *Pneumonia, Mycoplasma/microbiology ; Female ; Male ; Child, Preschool ; *COVID-19/epidemiology ; Child ; *Mycoplasma pneumoniae/drug effects/genetics/isolation &amp; purification ; *Microbiota/genetics ; SARS-CoV-2 ; *Respiratory System/microbiology ; Drug Resistance, Bacterial ; Infant ; Anti-Bacterial Agents/therapeutic use/pharmacology ; High-Throughput Nucleotide Sequencing ; Macrolides/pharmacology ; Metagenomics ; RNA, Ribosomal, 23S/genetics ; }, abstract = {INTRODUCTION: Little was known about the characteristics of low respiratory tract (LRT) microbiota of refractory M. pneumoniae pneumonia (RMPP) in children before and after the COVID-19 pandemic.<br><br>METHODS: Forty-two children diagnosed with RMPP in 2019 (Y2019 group) and 33 children diagnosed with RMPP in 2023 (Y2023 group), entered into the study. The characteristics of the clinical findings were examined, and the LRT microbiota was analyzed by metagenomic next generation sequencing.<br><br>RESULTS: The ratio of consolidate, atelectasis, lung necrosis, and erythema multiforme in Y2023 group was significantly higher than that in Y2019 (P<0.05). Mycoplasmoides pneumoniae was the top species of the LRT microbiota in both groups. The rate of macrolide resistance MP in Y2023 was significantly higher than that in Y2019 (P<0.05), and the mutant site was all 23S rRNA A2063G. There were no significant differences in &#x3b1;-diversity and &#x3b2;-diversity of LRT microbiota between Y2019 and Y2023 group. Trichoderma citrinoviride, Canine mastadenovirus A, Ralstonia pickettii, Lactococcus lactis, Pseudomonas aeruginosa were the biomarkers of LRT microbiota in children with RMPP of Y2023. The abundance of Mycoplasmoides pneumoniae positively correlated with the levels of D-dimer and LDH, negatively correlated with the counts of CD3[+] T cells, CD8[+] T cells, CD19[+] B cells and CD16[+]CD56[+] NK cells.<br><br>DISCUSSION: Our study showed that high abundance of MP was correlated with the severity of RMPP and decrease of immune cells. Trichoderma citrinoviride, Canine mastadenovirus A, Ralstonia pickettii, Lactococcus lactis, Pseudomonas aeruginosa were the biomarkers in microbiota of LRT in children with RMPP post COVID-19 era.}, }
@article {pmid39905573, year = {2025}, author = {Armstrong, E and Liu, R and Pollock, J and Huibner, S and Udayakumar, S and Irungu, E and Ngurukiri, P and Muthoga, P and Adhiambo, W and Yegorov, S and Kimani, J and Beattie, T and Coburn, B and Kaul, R}, title = {Quantitative profiling of the vaginal microbiota improves resolution of the microbiota-immune axis.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {39}, pmid = {39905573}, issn = {2049-2618}, support = {Canada Graduate Scholarship/CAPMC/CIHR/Canada ; Vanier Canada Graduate Scholarship/CAPMC/CIHR/Canada ; PJT-180629/CAPMC/CIHR/Canada ; MR/R023182/1//Medical Research Council and the UK Foreign, Commonwealth and Development Office/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology/immunology ; *Vaginosis, Bacterial/microbiology/immunology ; *Microbiota/immunology/genetics ; Kenya ; Adult ; Sex Workers ; *Bacteria/classification/genetics/isolation &amp; purification ; Bacterial Load ; Cytokines/immunology/metabolism ; Young Adult ; Uganda ; Host Microbial Interactions/immunology ; }, abstract = {BACKGROUND: The composition of the vaginal microbiota is closely linked to adverse sexual and reproductive health outcomes, due in part to effects on genital immunology. Compositional approaches such as metagenomic sequencing provide a snapshot of all bacteria in a sample and have become the standard for characterizing the vaginal microbiota, but only provide microbial relative abundances. We hypothesized that the addition of absolute abundance data would provide a more complete picture of host-microbe interactions in the female genital tract.<br><br>RESULTS: We analyzed cervicovaginal secretions from 196 female sex workers in Kenya and found that bacterial load was elevated among women with diverse, bacterial vaginosis (BV)-type microbiota and lower among women with Lactobacillus predominance. Bacterial load was also positively associated with proinflammatory cytokines, such as IL-1&#x3b1;, and negatively associated with chemokines, such as IP-10. The associations between bacterial load and immune factors differed across bacterial community states, but L. crispatus predominance was the only microbial community where higher bacterial load was not associated with higher proinflammatory cytokines. Total vaginal bacterial load was also a stronger predictor of the genital immune environment than BV by Nugent score, the current clinical standard, in the Kenya-based cohort and in a Uganda-based confirmatory cohort.<br><br>CONCLUSIONS: Our results suggest that total vaginal bacterial load is at least as strong a predictor of the genital immune milieu as current BV clinical diagnostic tools, supporting exploration of the vaginal bacterial load as a predictor of adverse reproductive and sexual health outcomes. Video Abstract.}, }
@article {pmid39905490, year = {2025}, author = {Molina-Pardines, C and Haro-Moreno, JM and Rodriguez-Valera, F and López-Pérez, M}, title = {Extensive paralogism in the environmental pangenome: a key factor in the ecological success of natural SAR11 populations.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {41}, pmid = {39905490}, issn = {2049-2618}, support = {PRE2021-098122//Ministerio de Econom&#xed;a y Competitividad/ ; PID2020-118052GB-I00//Ministerio de Econom&#xed;a y Competitividad/ ; 2021/PER/00020//Ministerio de Universidades/ ; }, mesh = {Metagenomics/methods ; Genetic Variation ; Mediterranean Sea ; *Genome, Bacterial ; Phylogeny ; *Microbiota/genetics ; *Seawater/microbiology ; Metagenome ; }, abstract = {BACKGROUND: The oceanic microbiome is dominated by members of the SAR11 clade. Despite their abundance, challenges in recovering the full genetic diversity of natural populations have hindered our understanding of the eco-evolutionary mechanisms driving intra-species variation. In this study, we employed a combination of single-amplified genomes and long-read metagenomics to recover the genomic diversity of natural populations within the SAR11 genomospecies Ia.3/VII, the dominant group in the Mediterranean Sea.<br><br>RESULTS: The reconstruction of the first complete genome within this genomospecies revealed that the core genome represents a significant proportion of the genome (~&#x2009;81%), with highly divergent areas that allow for greater strain-dependent metabolic flexibility. The flexible genome was concentrated in small regions, typically containing a single gene, and was&#xa0;located in equivalent regions within the genomospecies. Each variable region was associated with a specific set of genes that, despite exhibiting some divergence, maintained equivalent biological functionality within the population. The environmental pangenome is large and enriched in genes involved in nutrient transport, as well as cell wall synthesis and modification, showing an extremely high degree of functional redundancy in the flexible genome (i.e. paralogisms).<br><br>CONCLUSIONS: This genomic architecture promotes polyclonality, preserving genetic variation within the population. This, in turn,&#xa0;mitigates intraspecific competition and enables the population to thrive under variable environmental conditions and selective pressures. Furthermore, this study demonstrates the power of long-read metagenomics in capturing the full genetic diversity of environmental SAR11 populations, overcoming the limitations of second-generation sequencing technologies in genome assembly. Video Abstract.}, }
@article {pmid39905038, year = {2025}, author = {Qu, Q and Dou, Q and Xiang, Z and Yu, B and Chen, L and Fan, Z and Zhao, X and Yang, S and Zeng, P}, title = {Population-level gut microbiome and its associations with environmental factors and metabolic disorders in Southwest China.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {24}, pmid = {39905038}, issn = {2055-5008}, mesh = {Humans ; *Gastrointestinal Microbiome ; China/epidemiology ; Feces/microbiology ; *Metabolic Diseases/microbiology/epidemiology ; Metagenomics/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Female ; Life Style ; Adult ; Middle Aged ; Diet ; Metagenome ; Socioeconomic Factors ; }, abstract = {Gut microbiota affects host health and disease. Large-scale cohorts have explored the interactions between the microbiota, host, and environment to reveal the disease-associated microbiota variation. A population-level gut metagenomic cohort is still rare in China. Here, we performed metagenomic sequencing on fecal samples from the CMEC Microbiome Project in Southwest China. In this study, we identified host socioeconomics, diet, lifestyle, and medical measurements that were significantly associated with microbiome function and composition. We revealed extensive novel associations between the host microbiome and common metabolic disorders. Our results provide new insight into associations of gut microbiota with metabolic disorders so as to support the translation of gut microbiome findings into potential clinical practice.}, }
@article {pmid39904998, year = {2025}, author = {Boulton, W and Salamov, A and Grigoriev, IV and Calhoun, S and LaButti, K and Riley, R and Barry, K and Fong, AA and Hoppe, CJM and Metfies, K and Oetjen, K and Eggers, SL and Müller, O and Gardner, J and Granskog, MA and Torstensson, A and Oggier, M and Larsen, A and Bratbak, G and Toseland, A and Leggett, RM and Moulton, V and Mock, T}, title = {Metagenome-assembled-genomes recovered from the Arctic drift expedition MOSAiC.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {204}, pmid = {39904998}, issn = {2052-4463}, mesh = {Arctic Regions ; *Metagenome ; Ecosystem ; Ice Cover ; Oceans and Seas ; Expeditions ; Microbiota ; }, abstract = {The Multidisciplinary Observatory for Study of the Arctic Climate (MOSAiC) expedition consisted of a year-long drifting survey of the Central Arctic Ocean. The ecosystems component of MOSAiC included the sampling of molecular data, with metagenomes collected from a diverse range of environments. The generation of metagenome-assembled-genomes (MAGs) from metagenomes are a starting point for genome-resolved analyses. This dataset presents a catalogue of MAGs recovered from a set of 73 samples from MOSAiC, including 2407 prokaryotic and 56 eukaryotic MAGs, as well as annotations of a near complete eukaryotic MAG using the Joint Genome Institute (JGI) annotation pipeline. The metagenomic samples are from the surface ocean, chlorophyll maximum, mesopelagic and bathypelagic, within leads and under-ice ocean, as well as melt ponds, ice ridges, and first- and second-year sea ice. This set of MAGs can be used to benchmark microbial biodiversity in the Central Arctic Ocean, compare individual strains across space and time, and to study changes in Arctic microbial communities from the winter to summer, at a genomic level.}, }
@article {pmid39904008, year = {2025}, author = {Bohra, V and Lai, KK and Lam, KL and Tam, NF and Jing-Liang, S and Lee, FW}, title = {Metagenomic surveillance reveals different structure and function of microbial community associated with mangrove pneumatophores and their surrounding matrices.}, journal = {Marine pollution bulletin}, volume = {213}, number = {}, pages = {117614}, doi = {10.1016/j.marpolbul.2025.117614}, pmid = {39904008}, issn = {1879-3363}, mesh = {*Metagenomics ; Geologic Sediments/microbiology ; *Wetlands ; *Microbiota ; *Avicennia/microbiology ; Bacteria/classification/genetics ; }, abstract = {Present research employed metagenomics to explore the structural and functional diversity of microorganisms in two matrices of pneumatophore: adhered sediments (PS) and epiphytes (PE) of Avicennia marina. These were compared with microorganisms in surrounding environments: tidal water (TW), mudflat sediment (MF) and mangrove sediment (MS). Results revealed that bacteria made up over 95 % of the microbial community across all five matrices, with the dominance of phylum Proteobacteria, because of their metabolic flexibility and ability to survive in harsh mangrove environment. The bacterial community in PS and PE were similar to TW but differed from those in MF and MS, implying their provenance from TW. The high relative abundance of genes involved in nitrate and sulfur reduction pathways in PS and PE indicates pneumatophore bacteria helps in enhancing nitrogen and sulfur availability. This study is the first to explore the functional significance of pneumatophore-adhered prokaryotic communities using metagenomics.}, }
@article {pmid39903999, year = {2025}, author = {Mondal, A and Parvez, SS and Majumder, A and Sharma, K and Das, B and Bakshi, U and Alam, M and Banik, A}, title = {Co-inoculation of Trichoderma and tea root-associated bacteria enhance flavonoid production and abundance of mycorrhizal colonization in tea (Camellia sinensis).}, journal = {Microbiological research}, volume = {293}, number = {}, pages = {128084}, doi = {10.1016/j.micres.2025.128084}, pmid = {39903999}, issn = {1618-0623}, mesh = {*Camellia sinensis/microbiology/metabolism ; *Flavonoids/biosynthesis ; *Plant Roots/microbiology ; *Mycorrhizae/growth &amp; development ; Soil Microbiology ; Rhizosphere ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Microbiota ; *Trichoderma/physiology/growth &amp; development ; India ; Symbiosis ; Plant Leaves/microbiology/metabolism ; Tea/microbiology ; Phylogeny ; }, abstract = {Tea is one of the most popular nonalcoholic beverages, that contains several medicinally important flavonoids. Due to seasonal variation and various environmental stresses, the overall consistency of tea flavonoids affects the tea quality. To combat stress, plants stimulate symbiotic relationships with root-associated beneficial microbiomes that sustain nutrient allocation. Therefore, a study has been designed to understand the role of the tea root microbiome in sustaining tea leaf flavonoid production. To enumerate the microbiome, tea root and rhizoplane soil were collected from 3 years of healthy plants from Jalpaiguri district, West Bengal, India. A culture-independent approach was adopted to identify root and rhizosphere microbial diversity (BioSample: SAMN31404869; SRA: SRS15503027 [rhizosphere soil metagenome] BioSample: SAMN31404868;SRA:SRS15503030 [root metagenome]. In addition to diverse microbes, four mycorrhiza fungi, i.e., Glomus intraradices, Glomus irregulare, Paraglomus occultum and Scutellospora heterogama were predominant in collected root samples. A culture-dependent approach was also adopted to isolate several plant growth-promoting bacteria [Bacillus sp. D56, Bacillus sp. D42, Bacillus sp. DR15, Rhizobium sp. DR23 (NCBI Accession: OR821747-OR821750)] and one fungal [Trichoderma sp. AM6 (NCBI Accession:OM915414)] strain. A pot experiment was designed to assess the impact of that isolated microbiome on tea seedlings. After six months of microbiome inoculation, tea plants' physicochemical and transcriptional parameters were evaluated. The results confer that the microbiome-treated treatments [(T1-without any microbial inoculation; NCBI Accession: SAMN33591153), Trichoderma sp. AM6 (T2; NCBI Accession: SAMN33591155) and Trichoderma sp. AM6 +VAM containing tea root+synthetic microbial consortia (T5; NCBI Accession: SAMN33591154)] could enhance the total flavonoid content in tea seedlings by upregulating certain transcripts associated with the flavonoid biosynthesis pathway of tea.}, }
@article {pmid39903699, year = {2025}, author = {Roothans, N and van Loosdrecht, MCM and Laureni, M}, title = {Metabolic labour division trade-offs in denitrifying microbiomes.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {39903699}, issn = {1751-7370}, support = {JG191217009/732.750/CU//Stichting Toegepast Onderzoek Waterbeheer/ ; 20.0787440//Hoogheemraadschap Hollands Noorderkwartier/ ; Z62737/U131154//Waterschap de Dommel/ ; }, mesh = {*Denitrification ; *Microbiota ; Nitrates/metabolism ; *Bacteria/metabolism/genetics/classification ; Nitrites/metabolism ; Ecosystem ; }, abstract = {Division of metabolic labour is a defining trait of natural and engineered microbiomes. Denitrification-the stepwise reduction of nitrate and nitrite to nitrogenous gases-is inherently modular, catalysed either by a single microorganism (termed complete denitrifier) or by consortia of partial denitrifiers. Despite the pivotal role of denitrification in biogeochemical cycles and environmental biotechnologies, the ecological factors selecting for complete versus partial denitrifiers remain poorly understood. In this perspective, we critically review over 1500 published metagenome-assembled genomes of denitrifiers from diverse and globally relevant ecosystems. Our findings highlight the widespread occurrence of labour division and the dominance of partial denitrifiers in complex ecosystems, contrasting with the prevalence of complete denitrifiers only in simple laboratory cultures. We challenge current labour division theories centred around catabolic pathways, and discuss their limits in explaining the observed niche partitioning. Instead, we propose that labour division benefits partial denitrifiers by minimising resource allocation to denitrification, enabling broader metabolic adaptability to oligotrophic and dynamic environments. Conversely, stable, nutrient-rich laboratory cultures seem to favour complete denitrifiers, which maximise energy generation through denitrification. To resolve the ecological significance of metabolic trade-offs in denitrifying microbiomes, we advocate for mechanistic studies that integrate mixed-culture enrichments mimicking natural environments, multi-meta-omics, and targeted physiological characterisations. These undertakings will greatly advance our understanding of global nitrogen turnover and nitrogenous greenhouse gases emissions.}, }
@article {pmid39903340, year = {2025}, author = {Yan, Z and Zheng, Z and Cao, L and Zhu, Z and Zhou, C and Sun, Q and Tang, B and Zhao, G}, title = {Altered gut microbiome and serum metabolome profiles associated with essential tremor.}, journal = {Metabolic brain disease}, volume = {40}, number = {2}, pages = {118}, pmid = {39903340}, issn = {1573-7365}, support = {U20A20355//National Natural Science Foundation of China/ ; WKJ-ZJ-ZZ08//Major Health Science and Technology Program of Zhejiang Province/ ; LZ23H090004//Key Projects of Zhejiang Provincial Natural Science Fund/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Metabolome/physiology ; *Essential Tremor/microbiology/blood/metabolism ; Male ; Female ; Middle Aged ; Aged ; Dysbiosis/metabolism/microbiology ; Lipid Metabolism/physiology ; Metagenomics ; }, abstract = {The genetic predisposition and environmental factors both trigger the complex neurological dyskinesia of essential tremor (ET). Gut dysbiosis may facilitate the occurrence and development of neurological diseases. Therefore, it is worth exploring the inner connections between gut microbiota and ET. First, the gut microbiota of 19 ET patients and 21 healthy controls (HCs) were analysed with metagenomics approach. Second, the potential linkages between gut microbiome and serum metabolome profiles were explored by integrative analysis. The gut microbiota disorders were present in ET patients. The LEfSe method showed a significant decrease in Bacteroides. The functional analysis revealed that there were differences in gut microbial apoptosis, retinol metabolism, and steroid hormone biosynthesis pathways. The levels of various lipids and lipid-like molecules alter in serum of ET patients, which correlated with altered gut microbial abundance, indicating the alterations in lipid metabolism involved in apoptosis pathway in ET. All of these data point to the gut dysbiosis in ET, and some changed gut microbial species were linked to abnormalities in blood lipid metabolism, which open up new avenues for investigation into the pathophysiology of ET.}, }
@article {pmid39902937, year = {2025}, author = {Tian, C and Zhang, T and Zhuang, D and Luo, Y and Li, T and Zhao, F and Sang, J and Tang, Z and Jiang, P and Zhang, T and Liu, P and Zhu, L and Zhang, Z}, title = {Industrialization drives the gut microbiome and resistome of the Chinese populations.}, journal = {mSystems}, volume = {10}, number = {3}, pages = {e0137224}, pmid = {39902937}, issn = {2379-5077}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Bacteria/genetics/classification ; China ; *Drug Resistance, Bacterial/genetics ; Drug Resistance, Microbial/genetics ; Escherichia coli/genetics ; *Gastrointestinal Microbiome/genetics ; *Industrial Development ; Metagenomics/methods ; East Asian People ; }, abstract = {UNLABELLED: Industrialization has driven lifestyle changes in eastern and western Chinese populations, yet we have a poor understanding of the dynamic changes in their gut microbiome and resistome under industrialization, which is essential for the scientific management of public health. Here, this study employed metagenomics to analyze the gut microbiota of 1,382 healthy individuals from China, including 415 individuals from the eastern region of advanced industrialization and 967 individuals from the western region of developing industrialization. Compared with western populations, eastern populations show a significant increase in interindividual dissimilarity of microbial species composition and metabolic pathways but a significant decrease in intraindividual species and functional diversity. Furthermore, our results found significantly less abundance and richness of antibiotic resistance genes (ARGs) in the gut microbiota of eastern populations, alongside a lower prevalence of unique core ARG subtypes. For the 12 core ARG types shared between eastern and western populations, the mean relative abundance of two types was notably higher in the eastern populations, while eight core ARG types had significantly higher mean relative abundance in the western populations. Based on the reconstruction of metagenomic assembled genomes, we found that Escherichia coli genomes from western populations carried more virulence factor genes (VFGs) and mobile genetic elements (MGEs) compared to those from eastern populations. This large-scale study for the first time revealed industrialization potentially led to unexpected alterations of the gut microbiome and resistome between eastern and western populations that provide a vital implication for Chinese public health and may aid in the development of region-specific strategies for managing pathogenic infections.<br><br>IMPORTANCE: As China experiences rapid but uneven industrialization, understanding its effect on people's gut bacteria is critical for public health. This study reveals how industrialization may reshape the health risks related to gut bacteria and antibiotic resistance. This work provides crucial information to help create customized public health policies for different regions.}, }
@article {pmid39901058, year = {2025}, author = {Richardson, M and Zhao, S and Lin, L and Sheth, RU and Qu, Y and Lee, J and Moody, T and Ricaurte, D and Huang, Y and Velez-Cortes, F and Urtecho, G and Wang, HH}, title = {SAMPL-seq reveals micron-scale spatial hubs in the human gut microbiome.}, journal = {Nature microbiology}, volume = {10}, number = {2}, pages = {527-540}, pmid = {39901058}, issn = {2058-5276}, support = {HR0011-23-2-0001//United States Department of Defense | Defense Advanced Research Projects Agency (DARPA)/ ; MCB-2025515//National Science Foundation (NSF)/ ; 1016691//Burroughs Wellcome Fund (BWF)/ ; DGE-1644869//National Science Foundation (NSF)/ ; R21 AI146817/AI/NIAID NIH HHS/United States ; R01 AI132403/AI/NIAID NIH HHS/United States ; R01 EB031935/EB/NIBIB NIH HHS/United States ; R01 DK118044/DK/NIDDK NIH HHS/United States ; N00014-18-1-2237//United States Department of Defense | United States Navy | ONR | Office of Naval Research Global (ONR Global)/ ; W911NF-22-2-0210//United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Office (ARO)/ ; 2R01AI132403, 1R01DK118044, 1R01EB031935, 1R21AI146817//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; High-Throughput Nucleotide Sequencing/methods ; Feces/microbiology ; Microbial Consortia/genetics ; Metagenome ; Inulin ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The local arrangement of microbes can profoundly impact community assembly, function and stability. However, our understanding of the spatial organization of the human gut microbiome at the micron scale is limited. Here we describe a high-throughput and streamlined method called Split-And-pool Metagenomic Plot-sampling sequencing (SAMPL-seq) to capture spatial co-localization in a complex microbial consortium. The method obtains microbial composition of micron-scale subcommunities through split-and-pool barcoding. SAMPL-seq analysis of the healthy human gut microbiome identified bacterial taxa pairs that consistently co-occurred both over time and across multiple individuals. These co-localized microbes organize into spatially distinct groups or 'spatial hubs' dominated by Bacteroidaceae, Ruminococcaceae and Lachnospiraceae families. Using inulin as a dietary perturbation, we observed reversible spatial rearrangement of the gut microbiome where specific taxa form new local partnerships. Spatial metagenomics using SAMPL-seq can unlock insights into microbiomes at the micron scale.}, }
@article {pmid39900940, year = {2025}, author = {Prabhaharan, D and Go, YW and Kim, H and Kang, S and Sang, BI}, title = {Representative Metagenomes of Mesophilic Biogas Reactor Across South Korea.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {198}, pmid = {39900940}, issn = {2052-4463}, support = {MOE; 2022003480001//MOE | Korea Environmental Industry and Technology Institute (KEITI)/ ; }, mesh = {Republic of Korea ; *Metagenome ; *Biofuels ; *Bioreactors/microbiology ; *Microbiota ; Anaerobiosis ; }, abstract = {Biogas production through the anaerobic digestion (AD) of organic waste plays a crucial role in promoting sustainability and closing the carbon cycle. Over the past decade, this has driven global research on biogas-producing microbiomes, leading to significant advances in our understanding of microbial diversity and metabolic pathways within AD plants. However, substantial knowledge gaps persist, particularly in understanding the specific microbial communities involved in biogas production in countries such as South Korea. The present dataset addresses one of these gaps by providing comprehensive information on the metagenomes of five full-scale mesophilic biogas reactors in South Korea. From 110 GB of raw DNA sequences, 401 metagenome-assembled genomes (MAGs) were created, which include 42,301 annotated genes. Of these, 187 MAGs (46.7%) were classified as high-quality based on Minimum Information about Metagenome-Assembled Genome (MIMAG) standards. The data presented here contribute to a broader understanding of biogas-specific microbial communities and offers a significant resource for future studies and advancements in sustainable biogas production.}, }
@article {pmid39900569, year = {2025}, author = {Priest, T and Oldenburg, E and Popa, O and Dede, B and Metfies, K and von Appen, WJ and Torres-Valdés, S and Bienhold, C and Fuchs, BM and Amann, R and Boetius, A and Wietz, M}, title = {Seasonal recurrence and modular assembly of an Arctic pelagic marine microbiome.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {1326}, pmid = {39900569}, issn = {2041-1723}, mesh = {*Microbiota/genetics ; Arctic Regions ; *Seasons ; *Seawater/microbiology ; Bacteria/genetics/classification ; Metagenomics/methods ; Oceans and Seas ; Ecosystem ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; DNA Barcoding, Taxonomic ; }, abstract = {Deciphering how microbial communities are shaped by environmental variability is fundamental for understanding the structure and function of ocean ecosystems. While seasonal environmental gradients have been shown to structure the taxonomic dynamics of microbiomes over time, little is known about their impact on functional dynamics and the coupling between taxonomy and function. Here, we demonstrate annually recurrent, seasonal structuring of taxonomic and functional dynamics in a pelagic Arctic Ocean microbiome by combining autonomous samplers and in situ sensors with long-read metagenomics and SSU ribosomal metabarcoding. Specifically, we identified five temporal microbiome modules whose succession within each annual cycle represents a transition across different ecological states. For instance, Cand. Nitrosopumilus, Syndiniales, and the machinery to oxidise ammonia and reduce nitrite are signatures of early polar night, while late summer is characterised by Amylibacter and sulfur compound metabolism. Leveraging metatranscriptomes from Tara Oceans, we also demonstrate the consistency in functional dynamics across the wider Arctic Ocean during similar temporal periods. Furthermore, the structuring of genetic diversity within functions over time indicates that environmental selection pressure acts heterogeneously on microbiomes across seasons. By integrating taxonomic, functional and environmental information, our study provides fundamental insights into how microbiomes are structured under pronounced seasonal changes in understudied, yet rapidly changing polar marine ecosystems.}, }
@article {pmid39900484, year = {2025}, author = {Van Etten, J and Stephens, TG and Bhattacharya, D}, title = {Genetic Transfer in Action: Uncovering DNA Flow in an Extremophilic Microbial Community.}, journal = {Environmental microbiology}, volume = {27}, number = {2}, pages = {e70048}, pmid = {39900484}, issn = {1462-2920}, support = {//U.S. Department of Energy operated under Contract No. DE-AC02-05CH11231/ ; 10.46936/10.25585/60000481//Joint Genome Institute/ ; NJ01180//National Institute of Food and Agriculture/ ; 80NSSC19K1542/NASA/NASA/United States ; NASA (80NSSC19K0462)/NASA/NASA/United States ; }, mesh = {*Gene Transfer, Horizontal ; *Bacteria/genetics ; *Extremophiles/genetics ; *DNA, Bacterial/genetics ; Genome, Bacterial ; *Microbiota ; }, abstract = {Horizontal genetic transfer (HGT) is a significant driver of genomic novelty in all domains of life. HGT has been investigated in many studies however, the focus has been on conspicuous protein-coding DNA transfers that often prove to be adaptive in recipient organisms and are therefore fixed longer-term in lineages. These results comprise a subclass of HGTs and do not represent exhaustive (coding and non-coding) DNA transfer and its impact on ecology. Uncovering exhaustive HGT can provide key insights into the connectivity of genomes in communities and how these transfers may occur. In this study, we use the term frequency-inverse document frequency (TF-IDF) technique, that has been used successfully to mine DNA transfers within real and simulated high-quality prokaryote genomes, to search for exhaustive HGTs within an extremophilic microbial community. We establish a pipeline for validating transfers identified using this approach. We find that most DNA transfers are within-domain and involve non-coding DNA. A relatively high proportion of the predicted protein-coding HGTs appear to encode transposase activity, restriction-modification system components, and biofilm formation functions. Our study demonstrates the utility of the TF-IDF approach for HGT detection and provides insights into the mechanisms of recent DNA transfer.}, }
@article {pmid39897560, year = {2025}, author = {Zhang, P and Guo, R and Ma, S and Jiang, H and Yan, Q and Li, S and Wang, K and Deng, J and Zhang, Y and Zhang, Y and Wang, G and Chen, L and Li, L and Guo, X and Zhao, G and Yang, L and Wang, Y and Kang, J and Sha, S and Fan, S and Cheng, L and Meng, J and Yu, H and Chen, F and He, D and Wang, J and Liu, S and Shi, H}, title = {A metagenome-wide study of the gut virome in chronic kidney disease.}, journal = {Theranostics}, volume = {15}, number = {5}, pages = {1642-1661}, pmid = {39897560}, issn = {1838-7640}, mesh = {Humans ; *Renal Insufficiency, Chronic/virology/microbiology ; *Virome/genetics ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; Feces/virology/microbiology ; Female ; Male ; Middle Aged ; *Viruses/genetics/classification/isolation &amp; purification ; Adult ; Aged ; Metagenomics ; Dysbiosis ; }, abstract = {Rationale: Chronic kidney disease (CKD) is a progressively debilitating condition leading to kidney dysfunction and severe complications. While dysbiosis of the gut bacteriome has been linked to CKD, the alteration in the gut viral community and its role in CKD remain poorly understood. Methods: Here, we characterize the gut virome in CKD using metagenome-wide analyses of faecal samples from 425 patients and 290 healthy individuals. Results: CKD is associated with a remarkable shift in the gut viral profile that occurs regardless of host properties, disease stage, and underlying diseases. We identify 4,649 differentially abundant viral operational taxonomic units (vOTUs) and reveal that some CKD-enriched viruses are closely related to gut bacterial taxa such as Bacteroides, [Ruminococcus], Erysipelatoclostridium, and Enterocloster spp. In contrast, CKD-depleted viruses include more crAss-like viruses and often target Faecalibacterium, Ruminococcus, and Prevotella species. Functional annotation of the vOTUs reveals numerous viral functional signatures associated with CKD, notably a marked reduction in nicotinamide adenine dinucleotide (NAD[+]) synthesis capacity within the CKD-associated virome. Furthermore, most CKD viral signatures are reproducible in the gut viromes of diabetic kidney disease and several other common diseases, highlighting the considerable universality of disease-associated viromes. Conclusions: This research provides comprehensive resources and novel insights into the CKD-associated gut virome, offering valuable guidance for future mechanistic and therapeutic investigations.}, }
@article {pmid39895074, year = {2025}, author = {Lee, KA and Ul-Haq, A and Seo, H and Jo, S and Kim, S and Song, HY and Kim, HS}, title = {Characteristics of skin microbiome associated with disease severity in systemic sclerosis.}, journal = {Journal of microbiology (Seoul, Korea)}, volume = {63}, number = {1}, pages = {e.2409018}, doi = {10.71150/jm.2409018}, pmid = {39895074}, issn = {1976-3794}, support = {//Korea Health Industry Development Institute/ ; HI21C1888//Ministry of Health and Welfare/ ; //National Research Foundation of Korea/ ; RS-2023-00219563//Ministry of Science and ICT/ ; //Soonchunhyang University Research Fund/ ; }, mesh = {Humans ; *Scleroderma, Systemic/microbiology/pathology ; *Skin/microbiology/pathology ; Female ; Male ; Middle Aged ; *Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; Adult ; Severity of Illness Index ; Aged ; Metagenomics ; Biomarkers ; DNA, Bacterial/genetics ; Case-Control Studies ; Skin Microbiome ; }, abstract = {Systemic sclerosis (SSc) is a chronic autoimmune disorder characterised by skin fibrosis and internal organ involvement. Disruptions in the microbial communities on the skin may contribute to the onset of autoimmune diseases that affect the skin. However, current research on the skin microbiome in SSc is lacking. This study aimed to investigate skin microbiome associated with disease severity in SSc. Skin swabs were collected from the upper limbs of 46 healthy controls (HCs) and 36 patients with SSc. Metagenomic analysis based on the 16S rRNA gene was conducted and stratified by cutaneous subtype and modified Rodnan skin score (mRSS) severity. Significant differences in skin bacterial communities were observed between the HCs and patients with SSc, with further significant variations based on subtype and mRSS severity. The identified biomarkers were Bacteroides and Faecalibacterium for patients with diffuse cutaneous SSc with high mRSS (≥ 10) and Mycobacterium and Parabacteroides for those with low mRSS (< 10). Gardnerella, Abies, Lactobacillus, and Roseburia were the biomarkers in patients with limited cutaneous SSc (lcSS) and high mRSS, whereas Coprococcus predominated in patients with lcSS and low mRSS. Cutaneous subtype analysis identified Pediococcus as a biomarker in the HCs, whereas mRSS analysis revealed the presence of Pseudomonas in conjunction with Pediococcus. In conclusion, patients with SSc exhibit distinct skin microbiota compared with healthy controls. Bacterial composition varies by systemic sclerosis cutaneous subtype and skin thickness.}, }
@article {pmid39894225, year = {2025}, author = {Kim, SY and Woo, SY and Kim, HL and Chang, Y and Ryu, S and Kim, HN}, title = {A shotgun metagenomic study identified short-chain fatty acid-producing species and their functions in the gut microbiome of adults with depressive symptoms: Large-scale shotgun sequencing data of the gut microbiota using a cross-sectional design.}, journal = {Journal of affective disorders}, volume = {376}, number = {}, pages = {26-35}, doi = {10.1016/j.jad.2025.01.149}, pmid = {39894225}, issn = {1573-2517}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Male ; Female ; *Fatty Acids, Volatile/metabolism/biosynthesis ; Cross-Sectional Studies ; Adult ; Metagenomics ; Middle Aged ; Feces/microbiology ; *Depression/microbiology/metabolism ; *Depressive Disorder/microbiology ; Shotgun Sequencing ; }, abstract = {BACKGROUND: The gut-brain axis is emerging as a novel mechanism to explain depressive disorders.<br><br>METHODS: We performed shotgun metagenomic sequencing of stool samples obtained from 133 individuals with depression and 532 without depression. This study examined the taxonomy, functional pathways, and predicted metabolites profiles associated with depressive symptoms, using generalized linear models. To explore links between the taxonomic and functional pathway results, we compared the relative abundance of specific species contributing to pathways significantly associated with depressive symptoms.<br><br>RESULTS: Taxonomic composition suggested a disruption in short-chain fatty acid (SCFA)-producing capacity of the gut microbiome in the depressed group. Pathways related to SCFA biosynthesis were also depleted in this group. Faecalibacterium prausnitzii, a well-known SCFA-producing bacterium, was significantly decreased in the depressed group and was identified as a major contributor to the depleted pathways. When inferring the metabolites related to depression from metagenomic data, higher levels of docosapentaenoic acid, stearoyl ethanolamide, putrescine, and bilirubin were more likely to be found in the depressed group.<br><br>CONCLUSION: The present findings highlight the altered gut microbiota and associated SCFA-related pathways in individuals with depression. The depletion of F. prausnitzii and its contribution to SCFA production suggest that it is a potential therapeutic target for depression.}, }
@article {pmid39893935, year = {2025}, author = {Luo, Y and Gao, J and Su, X and Li, H and Li, Y and Qi, W and Han, X and Han, J and Zhao, Y and Zhang, A and Zheng, Y and Qian, F and He, H}, title = {Unraveling the immunological landscape and gut microbiome in sepsis: a comprehensive approach to diagnosis and prognosis.}, journal = {EBioMedicine}, volume = {113}, number = {}, pages = {105586}, pmid = {39893935}, issn = {2352-3964}, mesh = {Humans ; Prognosis ; *Sepsis/diagnosis/immunology/microbiology/mortality ; Male ; Female ; *Gastrointestinal Microbiome/immunology ; Middle Aged ; Biomarkers ; Aged ; Immunophenotyping ; Killer Cells, Natural/immunology/metabolism ; ROC Curve ; }, abstract = {BACKGROUND: Comprehensive and in-depth research on the immunophenotype of septic patients remains limited, and effective biomarkers for the diagnosis and treatment of sepsis are urgently needed in clinical practice.<br><br>METHODS: Blood samples from 31 septic patients in the Intensive Care Unit (ICU), 25 non-septic ICU patients, and 18&#xa0;healthy controls were analyzed using flow cytometry for deep immunophenotyping. Metagenomic sequencing was performed in 41 fecal samples, including 13 septic patients, 10 non-septic ICU patients, and 18 healthy controls. Immunophenotype shifts were evaluated using differential expression sliding window analysis, and random forest models were developed for sepsis diagnosis or prognosis prediction.<br><br>FINDINGS: Septic patients exhibited decreased proportions of natural killer (NK) cells and plasmacytoid dendritic cells (pDCs) in CD45[+] leukocytes compared with non-septic ICU patients and healthy controls. These changes statistically mediated the association of Bacteroides salyersiae with sepsis, suggesting a potential underlying mechanism. A&#xa0;combined diagnostic model incorporating B.salyersia, NK cells in CD45[+] leukocytes, and C-reactive protein (CRP) demonstrated high accuracy in distinguishing sepsis from non-sepsis (area under the receiver operating characteristic curve, AUC&#xa0;=&#xa0;0.950, 95% CI: 0.811-1.000). Immunophenotyping and disease severity analysis identified an Acute Physiology and Chronic Health Evaluation (APACHE) II score threshold of 21, effectively distinguishing mild (n&#xa0;=&#xa0;19) from severe (n&#xa0;=&#xa0;12) sepsis. A prognostic model based on the proportion of total lymphocytes, Helper T (Th) 17&#xa0;cells, CD4[+] effector memory T (TEM) cells, and Th1 cells in CD45[+] leukocytes achieved robust outcome prediction (AUC&#xa0;=&#xa0;0.906, 95% CI: 0.732-1.000), with further accuracy improvement when combined with clinical scores (AUC&#xa0;=&#xa0;0.938, 95% CI: 0.796-1.000).<br><br>INTERPRETATION: NK cell subsets within innate immunity exhibit significant diagnostic value for sepsis, particularly when combined with B.&#xa0;salyersiae and CRP. In addition, T cell phenotypes within adaptive immunity are correlated with sepsis severity and may serve as reliable prognostic markers.<br><br>FUNDING: This project was supported by the National Key R&amp;D Program of China (2023YFC2307600, 2021YFA1301000), Shanghai Municipal Science and Technology Major Project (2023SHZDZX02, 2017SHZDZX01), Shanghai Municipal Technology Standards Project (23DZ2202600).}, }
@article {pmid39893934, year = {2025}, author = {Zeng, S and Mo, S and Wu, X and Meng, C and Peng, P and Kashif, M and Li, J and He, S and Jiang, C}, title = {Microbial-mediated carbon metabolism in the subtropical marine mangroves affected by shrimp pond discharge.}, journal = {Marine environmental research}, volume = {205}, number = {}, pages = {106980}, doi = {10.1016/j.marenvres.2025.106980}, pmid = {39893934}, issn = {1879-0291}, mesh = {*Carbon/metabolism ; Animals ; *Wetlands ; Aquaculture ; Geologic Sediments/microbiology ; RNA, Ribosomal, 16S ; Microbiota ; Environmental Monitoring ; Ponds ; }, abstract = {Mangrove ecosystems exhibit high efficiency in carbon (C) sequestering within the global ecosystem. However, the rapid expansion of the shrimp farming industry poses a significant threat to these delicate ecosystems. The microbial mechanisms driving C metabolism in shrimp-affected sediments remain poorly understood. This study investigates the spatiotemporal dynamics of C metabolism-related microbial communities in shrimp pond and natural mangrove sediments in a subtropical region. Shrimp pond discharge altered soil properties, microbial diversity, and microbial stability, driven by factors such as salinity, sulfide, and total organic C (TOC). Metagenomic analyses reveals shifts in C degradation and oxidation, with a reduction in genes for cellulose and hemicellulose degradation. Microbial markers like Prolixibacteraceae and Nitrosopumilaceae reflect these changes. Co-occurrence network analysis indicates higher connectivity within shrimp pond groups, suggesting nutrient-driven changes in symbiotic relationships. PLS-PM analysis further confirms the interplay between microbial composition, nutrient levels, and C metabolism, with higher 16S rRNA operon copy numbers linked to increased C fixation. These findings demonstrate how shrimp pond discharge alters microbial networks and C metabolism, with implications for ecosystem resilience.}, }
@article {pmid39893570, year = {2025}, author = {Zampieri, G and Santinello, D and Palù, M and Orellana, E and Costantini, P and Favaro, L and Campanaro, S and Treu, L}, title = {Core cooperative metabolism in low-complexity CO2-fixing anaerobic microbiota.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {39893570}, issn = {1751-7370}, mesh = {*Carbon Dioxide/metabolism ; Methane/metabolism ; Anaerobiosis ; Hydrogen/metabolism ; *Microbiota ; Formates/metabolism ; *Methanobacteriaceae/metabolism/genetics ; Acetates/metabolism ; }, abstract = {Biological conversion of carbon dioxide into methane has a crucial role in global carbon cycling and is operated by a specialised set of anaerobic archaea. Although it is known that this conversion is strictly linked with cooperative bacterial activity, such as through syntrophic acetate oxidation, there is also a limited understanding on how this cooperation is regulated and metabolically realised. In this work, we investigate the activity in a microbial community evolved to efficiently convert carbon dioxide into methane and predominantly populated by Methanothermobacter wolfeii. Through multi-omics, biochemical analysis and constraint-based modelling, we identify a potential formate cross-feeding from an uncharacterised Limnochordia species to M. wolfeii, driven by the recently discovered reductive glycine pathway and upregulated when hydrogen and carbon dioxide are limited. The quantitative consistency of this metabolic exchange with experimental data is shown by metagenome-scale metabolic models integrating condition-specific metatranscriptomics, which also indicate a broader three-way interaction involving M. wolfeii, the Limnochordia species, and Sphaerobacter thermophilus. Under limited hydrogen and carbon dioxide, aspartate released by M. wolfeii is fermented by Sphaerobacter thermophilus into acetate, which in turn is convertible into formate by Limnochordia, possibly forming a cooperative loop sustaining hydrogenotrophic methanogenesis. These findings expand our knowledge on the modes of carbon dioxide reduction into methane within natural microbial communities and provide an example of cooperative plasticity surrounding this process.}, }
@article {pmid39893166, year = {2025}, author = {Bourquin, M and Peter, H and Michoud, G and Busi, SB and Kohler, TJ and Robison, AL and Styllas, M and Ezzat, L and Geers, AU and Huss, M and Fodelianakis, S and ,  and Battin, TJ}, title = {Predicting climate-change impacts on the global glacier-fed stream microbiome.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {1264}, pmid = {39893166}, issn = {2041-1723}, mesh = {*Microbiota/genetics ; *Climate Change ; *Ice Cover/microbiology ; Bacteria/genetics/classification ; *Rivers/microbiology ; Ecosystem ; Biodiversity ; Phylogeny ; Metagenome ; }, abstract = {The shrinkage of glaciers and the vanishing of glacier-fed streams (GFSs) are emblematic of climate change. However, forecasts of how GFS microbiome structure and function will change under projected climate change scenarios are lacking. Combining 2,333 prokaryotic metagenome-assembled genomes with climatic, glaciological, and environmental data collected by the Vanishing Glaciers project from 164 GFSs draining Earth's major mountain ranges, we here predict the future of the GFS microbiome until the end of the century under various climate change scenarios. Our model framework is rooted in a space-for-time substitution design and leverages statistical learning approaches. We predict that declining environmental selection promotes primary production in GFSs, stimulating both bacterial biomass and biodiversity. Concomitantly, predictions suggest that the phylogenetic structure of the GFS microbiome will change and entire bacterial clades are at risk. Furthermore, genomic projections reveal that microbiome functions will shift, with intensified solar energy acquisition pathways, heterotrophy and algal-bacterial interactions. Altogether, we project a 'greener' future of the world's GFSs accompanied by a loss of clades that have adapted to environmental harshness, with consequences for ecosystem functioning.}, }
@article {pmid39893159, year = {2025}, author = {Sampson, TR and Wallen, ZD and Won, WJ and Standaert, DG and Payami, H and Harms, AS}, title = {Alpha synuclein overexpression can drive microbiome dysbiosis in mice.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {4014}, pmid = {39893159}, issn = {2045-2322}, support = {ASAP-020527//Aligning Science Across Parkinson's/ ; ASAP-000375//Aligning Science Across Parkinson's/ ; }, mesh = {Animals ; *alpha-Synuclein/genetics/metabolism ; *Gastrointestinal Microbiome/genetics ; *Dysbiosis/microbiology/genetics ; Mice ; Mice, Transgenic ; *Parkinson Disease/microbiology/genetics/metabolism ; Disease Models, Animal ; Humans ; Male ; Aging ; }, abstract = {Growing evidence indicates that persons with Parkinson disease (PD), have a unique composition of indigenous gut microbes. Given the long prodromal or pre-diagnosed period, longitudinal studies of the human and rodent gut microbiome before symptomatic onset and for the duration of the disease are currently lacking. PD is partially characterized by the accumulation of the protein α-synuclein (α-syn) into insoluble aggregates, in both the central and enteric nervous systems. As such, several experimental rodent and non-human primate models of α-syn overexpression recapitulate some of the hallmark pathophysiologies of PD. These animal models provide an opportunity to assess how the gut microbiome changes with age under disease-relevant conditions. Here, we used a transgenic mouse strain, which overexpress wild-type human α-syn to test how the gut microbiome composition responds in this model of PD pathology during aging. Using shotgun metagenomics, we find significant, age and genotype-dependent bacterial taxa whose abundance becomes altered with age. We reveal that α-syn overexpression can drive alterations to the gut microbiome composition and suggest that it limits diversity through age. Taxa that were most affected by genotype-age interaction were Lactobacillus and Bifidobacteria. In a mouse model, we showed direct link between alpha synuclein geneotype (hallmark of PD), a dysbiotic and low-diversity gut microbiome, and dysbiotic levels of Bifidobacteria and Lactobacillus (most robust features of PD microbiome). Given emerging data on the potential contributions of the gut microbiome to PD pathologies, our data provide an experimental foundation to understand how the PD-associated microbiome may arise as a trigger or co-pathology to disease.}, }
@article {pmid39892320, year = {2025}, author = {Huang, L and Dai, W and Sun, X and Pu, Y and Feng, J and Jin, L and Sun, K}, title = {Diet-driven diversity of antibiotic resistance genes in wild bats: implications for public health.}, journal = {Microbiological research}, volume = {293}, number = {}, pages = {128086}, doi = {10.1016/j.micres.2025.128086}, pmid = {39892320}, issn = {1618-0623}, mesh = {Animals ; *Chiroptera/microbiology ; *Diet ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Gastrointestinal Microbiome/genetics ; Anti-Bacterial Agents/pharmacology ; Public Health ; Metagenomics ; *Drug Resistance, Bacterial/genetics ; Animals, Wild/microbiology ; Interspersed Repetitive Sequences ; Genes, Bacterial ; }, abstract = {Wild bats may serve as reservoirs for antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria, potentially contributing to antibiotic resistance and pathogen transmission. However, current assessments of bats' antibiotic resistance potential are limited to culture-dependent bacterial snapshots. In this study, we present metagenomic evidence supporting a strong association between diet, gut microbiota, and the resistome, highlighting bats as significant vectors for ARG propagation. We characterized gut microbiota, ARGs, and mobile genetic elements (MGEs) in bats with five distinct diets: frugivory, insectivory, piscivory, carnivory, and sanguivory. Our analysis revealed high levels of ARGs in bat guts, with limited potential for horizontal transfer, encompassing 1106 ARGs conferring resistance to 26 antibiotics. Multidrug-resistant and polymyxin-resistant genes were particularly prevalent among identified ARG types. The abundance and diversity of ARGs/MGEs varied significantly among bats with different dietary habits, possibly due to diet-related differences in microbial composition. Additionally, genetic linkage between high-risk ARGs and multiple MGEs was observed on the genomes of various zoonotic pathogens, indicating a potential threat to human health from wild bats. Overall, our study provides a comprehensive analysis of the resistome in wild bats and underscores the role of dietary habits in wildlife-associated public health risks.}, }
@article {pmid39891205, year = {2025}, author = {Huang, D and Liao, J and Balcazar, JL and Ye, M and Wu, R and Wang, D and Alvarez, PJJ and Yu, P}, title = {Adaptive modification of antiviral defense systems in microbial community under Cr-induced stress.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {34}, pmid = {39891205}, issn = {2049-2618}, support = {42177113//National Natural Science Foundation of China/ ; 42277418//National Natural Science Foundation of China/ ; Y2022084//the Youth Innovation Promotion Association, Chinese Academy of Sciences/ ; 2022YFC3704700//National Key Research and Development Program of China/ ; }, mesh = {*Chromium/toxicity/pharmacology ; Soil Microbiology ; *Microbiota/drug effects ; *Stress, Physiological ; *Bacteria/genetics/drug effects/virology ; Metagenomics/methods ; *Soil Pollutants ; Viruses/genetics/drug effects ; }, abstract = {BACKGROUND: The prokaryotic antiviral defense systems are crucial for mediating prokaryote-virus interactions that influence microbiome functioning and evolutionary dynamics. Despite the prevalence and significance of prokaryotic antiviral defense systems, their responses to abiotic stress and ecological consequences remain poorly understood in soil ecosystems. We established microcosm systems with varying concentrations of hexavalent chromium (Cr(VI)) to investigate the adaptive modifications of prokaryotic antiviral defense systems under abiotic stress.<br><br>RESULTS: Utilizing hybrid metagenomic assembly with long-read and short-read sequencing, we discovered that antiviral defense systems were more diverse and prevalent in heavily polluted soils, which was corroborated by meta-analyses of public datasets from various heavy metal-contaminated sites. As the Cr(VI) concentration increased, prokaryotes with defense systems favoring prokaryote-virus mutualism gradually supplanted those with defense systems incurring high adaptive costs. Additionally, as Cr(VI) concentrations increased, enriched antiviral defense systems exhibited synchronization with microbial heavy metal resistance genes. Furthermore, the proportion of antiviral defense systems carried by mobile genetic elements (MGEs), including plasmids and viruses, increased by approximately 43% and 39%, respectively, with rising Cr concentrations. This trend is conducive to strengthening the dissemination and sharing of defense resources within microbial communities.<br><br>CONCLUSIONS: Overall, our study reveals the adaptive modification of prokaryotic antiviral defense systems in soil ecosystems under abiotic stress, as well as their positive contributions to establishing prokaryote-virus mutualism and the evolution of microbial heavy metal resistance. These findings advance our understanding of microbial adaptation in stressful environments and may inspire novel approaches for microbiome manipulation and bioremediation. Video Abstract.}, }
@article {pmid39890997, year = {2025}, author = {Marter, P and Freese, HM and Ringel, V and Brinkmann, H and Pradella, S and Rohde, M and Jarek, M and Spröer, C and Wagner-Döbler, I and Overmann, J and Bunk, B and Petersen, J}, title = {Superior Resolution Profiling of the Coleofasciculus Microbiome by Amplicon Sequencing of the Complete 16S rRNA Gene and ITS Region.}, journal = {Environmental microbiology reports}, volume = {17}, number = {1}, pages = {e70066}, pmid = {39890997}, issn = {1758-2229}, support = {34509606-TRR 51//Deutsche Forschungsgemeinschaft/ ; //Collaborative Research Center Roseobacter (TRR51)/ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Microbiota ; Phylogeny ; *Cyanobacteria/genetics/classification/isolation &amp; purification ; Sequence Analysis, DNA ; DNA, Ribosomal Spacer/genetics/chemistry ; DNA, Bacterial/genetics/chemistry ; Metagenomics/methods ; Metagenome ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {The filamentous cyanobacterium Coleofasciculus chthonoplastes is the key primary producer of marine microbial mats. We elucidated the microbiomes of 32 non-axenic Coleofasciculus isolates using PacBio-based amplicon sequencing of the complete 16S rRNA gene and the internally transcribed spacer (16S-ITS). The length of authentic amplicon sequence variants (ASVs) ranged from 1827 to 3044 nucleotides (median: 2267 nt). The results, which were complemented by metagenome analyses and cultivation approaches, revealed the presence of more than 70 associated heterotrophs in the culture of Coleofasciculus sp. WW12. The great bacterial diversity in the cyanosphere is dominated by Pseudomonadota (59%) and Bacteroidota (23%). Allelic ribosomal operon variants were detected in 18 Coleofasciculus strains and our analyses proposed the presence of at least four different species. A comparative analysis of cyanobacterial microbiomes documented complementary advantages of amplicon sequencing versus metagenomics with an individual strength of the 16S-ITS approach in terms of (i) ribosomal target sequence quality, (ii) contaminant detection and (iii) identification of rare bacteria. The characterisation of the Coleofasciculus microbiome showed that long-read amplicon sequencing of the 16S-ITS region is the method of choice for rapid profiling of non-axenic cyanobacteria. Its superior resolution allows a reliable differentiation of even very closely related strains.}, }
@article {pmid39890137, year = {2025}, author = {Kennedy, EC and Ross, FC and O'Shea, CA and Lavelle, A and Ross, P and Dempsey, E and Stanton, C and Hawkes, CP}, title = {Observational study protocol: the faecal microbiome in the acute stage of new-onset paediatric type 1 diabetes in an Irish cohort.}, journal = {BMJ open}, volume = {15}, number = {1}, pages = {e089206}, pmid = {39890137}, issn = {2044-6055}, mesh = {Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Male ; *Diabetes Mellitus, Type 1/microbiology/metabolism ; Diabetic Ketoacidosis/microbiology ; *Feces/microbiology ; *Gastrointestinal Microbiome ; Ireland ; Metabolome ; Observational Studies as Topic ; Prospective Studies ; Research Design ; }, abstract = {INTRODUCTION: Type 1 diabetes (T1D) is an autoimmune-mediated disorder caused by the destruction of pancreatic beta cells. Although there is an underlying genetic predisposition to developing T1D, the trigger is multifactorial and likely includes environmental factors. The intestinal microbiome has been identified as one such factor. Previous studies have illustrated differences in the microbiota of people with T1D compared with healthy controls. This study aims to describe the evolution of the microbiome and metabolome during the first year of clinical T1D, or stage 3 T1D diagnosis, and investigate whether there are differences in the microbiome and metabolome of children who present with and without diabetic ketoacidosis. The study will also explore possible associations between the microbiome, metabolome, glycaemic control and beta cell reserve.<br><br>METHODS AND ANALYSIS: This prospective cohort study will include children with newly diagnosed T1D and sibling controls (n=100, males and females) and their faecal microbiome will be characterised using shotgun metagenomic sequencing at multiple time points during the first year of diagnosis. We will develop a microbial culture biobank based on culturomic studies of stool samples from the healthy controls that will support future investigation. Metabolomic analysis will aim to identify additional biomarkers which may be involved in disease presentation and progression. Through this initial exploratory study, we aim to identify specific microbial biomarkers which may be used as future interventional targets throughout the various stages of T1D progression.<br><br>ETHICS AND DISSEMINATION: This study has been approved by the Clinical Research Ethics Committee of the Cork Teaching Hospitals. Study results will be available to patients with T1D and their families, carers, support networks and microbiome societies and other researchers.<br><br>TRIAL REGISTRATION NUMBER: The clinicaltrials.gov registration number for this trial is NCT06157736.}, }
@article {pmid39887373, year = {2025}, author = {Byrd, DA and Damerell, V and Gomez Morales, MF and Hogue, SR and Lin, T and Ose, J and Himbert, C and Ilozumba, MN and Kahlert, C and Shibata, D and Toriola, AT and Li, CI and Figueiredo, J and Stephens, WZ and Warby, CA and Hardikar, S and Siegel, EM and Round, J and Ulrich, CM and Gigic, B}, title = {The gut microbiome is associated with disease-free survival in stage I-III colorectal cancer patients.}, journal = {International journal of cancer}, volume = {157}, number = {1}, pages = {64-73}, doi = {10.1002/ijc.35342}, pmid = {39887373}, issn = {1097-0215}, support = {01KD2101D//German Federal Ministry of Education and Research/ ; R01 AG083580/AG/NIA NIH HHS/United States ; //Stiftung LebensBlicke/ ; //ERA-NET on Translational Cancer Research (TRANSCAN)/ ; //Rahel Goitein-Straus-Program/ ; 01KT1503//German Federal Ministry of Education and Research/ ; //Matthias-Lackas Foundations/ ; U01 CA206110/NH/NIH HHS/United States ; //Heidelberger Stiftung Chirurgie, Heidelberg University Hospital/ ; R01 CA189184/NH/NIH HHS/United States ; //Medizinische Fakult&#xe4;t Heidelberg, Universit&#xe4;t Heidelberg/ ; U01 CA206110/CA/NCI NIH HHS/United States ; R01 CA189184/NH/NIH HHS/United States ; U01 CA206110/NH/NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Colorectal Neoplasms/microbiology/pathology/mortality ; Female ; Male ; Middle Aged ; Aged ; Feces/microbiology ; Disease-Free Survival ; RNA, Ribosomal, 16S/genetics ; Prospective Studies ; Neoplasm Staging ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {Colorectal cancer (CRC) is the second overall leading cause of cancer death in the United States, with recurrence being a frequent cause of mortality. Approaches to improve disease-free survival (DFS) are urgently needed. The gut microbiome, reflected in fecal samples, is likely mechanistically linked to CRC progression and may serve as a non-invasive biomarker. Accordingly, we leveraged baseline fecal samples from N = 166 stage I-III CRC patients in the ColoCare Study, a prospective cohort of newly diagnosed CRC patients. We sequenced the V3 and V4 regions of the 16S rRNA gene to characterize fecal bacteria. We calculated estimates of alpha diversity, beta diversity, and a priori- and exploratory-selected bacterial presence/absence and relative abundance. Associations of microbial metrics with DFS were estimated using multivariable Cox proportional hazards models. We found that alpha diversity was strongly associated with improved DFS, most strongly among rectal cancer patients (Shannon HRrectum = 0.40 95% CI = 0.19, 0.87; p = .02). Overall microbiome composition differences (beta diversity), as characterized by principal coordinate axes, were statistically significantly associated with DFS. Peptostreptococcus was statistically significantly associated with worse DFS (HR = 1.62, 95% CI = 1.13, 2.31; p = .01 per 1-SD) and Order Clostridiales was associated with improved DFS (HR = 0.62, 95% CI = 0.43-0.88; p = .01 per 1-SD). In exploratory analyses, Coprococcus and Roseburia were strongly associated with improved DFS. Overall, higher bacterial diversity and multiple bacteria were strongly associated with DFS. Metagenomic sequencing to elucidate species, gene, and functional level details among larger, diverse patient populations are critically needed to support the microbiome as a biomarker of CRC outcomes.}, }
@article {pmid39887086, year = {2025}, author = {Breton, J and Tu, V and Tanes, C and Wilson, N and Quinn, R and Kachelries, K and Friedman, ES and Bittinger, K and Baldassano, RN and Compher, C and Albenberg, L}, title = {A pro-inflammatory diet is associated with growth and virulence of Escherichia coli in pediatric Crohn's disease.}, journal = {Journal of Crohn's &amp; colitis}, volume = {19}, number = {2}, pages = {}, doi = {10.1093/ecco-jcc/jjaf018}, pmid = {39887086}, issn = {1876-4479}, support = {4100068710//Commonwealth Universal Research Enhancement/ ; 693867//Crohn's and Colitis Foundation Career Development Award/ ; }, mesh = {Humans ; *Crohn Disease/microbiology ; Child ; Male ; Cross-Sectional Studies ; Female ; Adolescent ; *Escherichia coli/pathogenicity/growth &amp; development/isolation &amp; purification ; Gastrointestinal Microbiome ; Feces/microbiology ; Virulence ; *Diet/adverse effects ; Case-Control Studies ; Inflammation ; Metabolome ; }, abstract = {BACKGROUND AND AIMS: Epidemiological studies have suggested an association between the inflammatory potential of dietary patterns and Crohn's disease (CD). However, the relationships of these inflammatory dietary determinants with the microbiome remain largely unknown. In this cross-sectional study, we evaluate the association between the inflammatory potential of habitual diet, as assessed by the modified Children-Dietary Inflammatory Index (mC-DII), and the fecal microbiome and metabolome of children with CD in comparison to healthy children.<br><br>METHODS: A cross-sectional study including 51 children with CD between 6 and 18 years of age and 50 healthy controls was conducted. Dietary inflammatory potential was measured using the mC-DII, and diet quality was assessed by the Healthy Eating Index (HEI)-2015 and alternate Mediterranean Eating Index (aMed). The microbiome was analyzed using shotgun metagenomic sequencing and untargeted metabolomic analysis.<br><br>RESULTS: A poor-quality, pro-inflammatory diet, with similar mC-DII, HEI-2015, and aMed scores, was found across healthy children and children with CD. In children with active disease, a pro-inflammatory diet was associated with decreased diversity, increased virulence potential, and expansion of the Proteobacteria phylum dominated by Escherichia coli (E. coli) spp. A positive correlation between E. coli relative abundance and mC-DII was associated with a low intake of a cluster composed of fibers, vitamins, and minerals with anti-inflammatory potential. A negative association between metabolites of fatty acid metabolism and HEI was found.<br><br>CONCLUSIONS: In total, our results suggest that a pro-inflammatory diet may potentiate hallmarks of the inflammation-associated dysbiosis in CD and highlight the need for microbiome-targeted dietary interventions optimizing the anti-inflammatory potential of habitual diet in the management of pediatric CD.}, }
@article {pmid39885121, year = {2025}, author = {Nooij, S and Plomp, N and Sanders, IMJG and Schout, L and van der Meulen, AE and Terveer, EM and Norman, JM and Karcher, N and Larralde, MF and Vossen, RHAM and Kloet, SL and Faber, KN and Harmsen, HJM and Zeller, GF and Kuijper, EJ and Smits, WK and Ducarmon, QR}, title = {Metagenomic global survey and in-depth genomic analyses of Ruminococcus gnavus reveal differences across host lifestyle and health status.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {1182}, pmid = {39885121}, issn = {2041-1723}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Crohn Disease/microbiology ; *Genome, Bacterial/genetics ; *Metagenomics/methods ; *Clostridiales/genetics/isolation &amp; purification ; *Metagenome/genetics ; Female ; Genome-Wide Association Study ; Male ; Infant, Newborn ; Phylogeny ; *Ruminococcus/genetics ; Adult ; }, abstract = {Ruminococcus gnavus is a gut bacterium found in > 90% of healthy individuals, but its increased abundance is also associated with chronic inflammatory diseases, particularly Crohn's disease. Nevertheless, its global distribution and intraspecies genomic variation remain understudied. By surveying 12,791 gut metagenomes, we recapitulated known associations with metabolic diseases and inflammatory bowel disease. We uncovered a higher prevalence and abundance of R. gnavus in Westernized populations and observed bacterial relative abundances up to 83% in newborns. Next, we built a resource of R. gnavus isolates (N = 45) from healthy individuals and Crohn's disease patients and generated complete R. gnavus genomes using PacBio circular consensus sequencing. Analysis of these genomes and publicly available high-quality draft genomes (N = 333 genomes) revealed multiple clades which separated Crohn's-derived isolates from healthy-derived isolates. Presumed R. gnavus virulence factors could not explain this separation. Bacterial genome-wide association study revealed that Crohn's-derived isolates were enriched in genes related to mobile elements and mucin foraging. Together, we present a large R. gnavus resource that will be available to the scientific community and provide novel biological insights into the global distribution and genomic variation of R. gnavus.}, }
@article {pmid39884534, year = {2025}, author = {Zhou, M and Luo, C and Zhang, J and Li, R and Chen, J and Ren, P and Tang, Y and Suo, Z and Chen, K}, title = {Potential risk of microplastics in plateau karst lakes: Insights from metagenomic analysis.}, journal = {Environmental research}, volume = {270}, number = {}, pages = {120984}, doi = {10.1016/j.envres.2025.120984}, pmid = {39884534}, issn = {1096-0953}, mesh = {*Lakes/microbiology/chemistry ; *Microplastics/analysis ; *Water Pollutants, Chemical/analysis ; Metagenomics ; *Environmental Monitoring ; Microbiota ; Geologic Sediments/microbiology ; Tibet ; Biofilms ; Drug Resistance, Microbial/genetics ; Metagenome ; }, abstract = {Microplastic (MP) pollution has become one of global concern. While MP pollution in lakes has been well studied, research on MP sources, distribution, and ecological risks in the Tibetan Plateau is limited. We systematically investigated the MP abundance and distribution in alpine travertine lakes in Jiuzhai nature reserve located in east edge of Qinghai-Tibetan Plateau and assessed the distributions of microbiomes, antibiotic resistance genes (ARGs), and virulence factor genes (VFGs) in water, sediments, and MPs, using macrogenomics. MP abundance was 20.27-58.80 n/L in water and 583.33-996.67 n/kg in sediments. MPs were dominantly fibrous and transparent. The particle size distribution was 0.1-0.5 mm for MPs in water, and 0.5-1 mm in sediments. MPs were mainly composed of polyethylene and polyethylene terephthalate. The microbial community of MP biofilms differed from that in the surrounding environmental medium, and Proteobacteria were more abundant in biofilm than in water and sediment. MP biofilms exhibited more cooperative behavior with microorganisms in water than with those in sediments. MPs were selectively enriched for ARGs and VFGs, and MP biofilms had a higher diversity of ARGs, the most abundant isoform being msbA, which is a multidrug resistance gene. VFGs were more abundant in MP biofilms than in water and sediment. The study results are useful for understanding MP sources and ecological risks in plateau karst lakes and provide a valuable dataset and theoretical basis for studies on MP pollution in other alpine calcareous lakes.}, }
@article {pmid39884152, year = {2025}, author = {Maphosa, S and Steyn, M and Lebre, PH and Gokul, JK and Convey, P and Marais, E and Maggs-Kölling, G and Cowan, DA}, title = {Rhizosphere bacterial communities of Namib Desert plant species: Evidence of specialised plant-microbe associations.}, journal = {Microbiological research}, volume = {293}, number = {}, pages = {128076}, doi = {10.1016/j.micres.2025.128076}, pmid = {39884152}, issn = {1618-0623}, mesh = {*Rhizosphere ; *Soil Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Desert Climate ; Phylogeny ; Plant Roots/microbiology ; *Microbiota ; *Plants/microbiology ; Namibia ; DNA, Bacterial/genetics ; Soil/chemistry ; Biodiversity ; }, abstract = {Rhizosphere microbial communities are intimately associated with plant root surfaces. The rhizosphere microbiome is recruited from the surrounding soil and is known to impact positively on the plant host via enhanced resistance to pathogens, increased nutrient availability, growth stimulation and increased resistance to desiccation. Desert ecosystems harbour a diversity of perennial and annual plant species, generally exhibiting considerable physiological adaptation to the low-water environment. In this study, we explored the rhizosphere bacterial microbiomes associated with selected desert plant species. The rhizosphere bacterial communities of 11 plant species from the central Namib Desert were assessed using 16S rRNA gene-dependent phylogenetic analyses. The rhizosphere microbial community of each host plant species was compared with control soils collected from their immediate vicinity, and with those of all other host plants. Rhizosphere and control soil bacterial communities differed significantly and were influenced by both location and plant species. Rhizosphere-associated genera included 67 known plant growth-promoting taxa, including Rhizobium, Bacillus, Microvirga, Kocuria and Paenibacillus. Other than Kocuria, these genera constituted the 'core' rhizosphere bacterial microbiome, defined as being present in > 90 % of the rhizosphere communities. Nine of the 11 desert plant species harboured varying numbers and proportions of species-specific microbial taxa. Predictive analyses of functional pathways linked to rhizosphere microbial taxa showed that these were significantly enriched in the biosynthesis or degradation of a variety of substances such as sugars, secondary metabolites, phenolic compounds and antimicrobials. Overall, our data suggest that plant species in the Namib Desert recruit unique taxa to their rhizosphere bacterial microbiomes that may contribute to their resilience in this extreme environment.}, }
@article {pmid39881417, year = {2025}, author = {Ye, GC and Peng, H and Xiang, JC and Miao, LT and Liu, CZ and Wang, SG and Xia, QD}, title = {Comprehensive analysis of the interaction microbiome and prostate cancer: an initial exploration from multi-cohort metagenome and GWAS studies.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {130}, pmid = {39881417}, issn = {1479-5876}, mesh = {Male ; *Prostatic Neoplasms/microbiology/genetics/pathology ; Humans ; *Metagenome/genetics ; *Genome-Wide Association Study ; Cohort Studies ; Gastrointestinal Microbiome/genetics ; *Microbiota ; Neoplasm Metastasis ; }, abstract = {INTRODUCTION: Prostate cancer is one of the most common cancers in the United States with a high mortality rate. In recent years, the traditional opinion about prostate microbiome was challenged. Although there still are some arguments, an escalating number of researchers are shifting their focus toward the microbiome within the prostate tumor environment.<br><br>METHODS: We mined the data of the microbiome extracted from the metagenome, and it offers a broader taxonomic coverage and accurate functional profiling. We used Kraken2, a mapping tool, to mine the gut microbiota of prostate cancer patients. A two-sample Mendelian Randomization was conducted to reflect the association between gut microbiome and cancer.<br><br>RESULTS: In the study, we found the consistency of the special intratumor microbiome of both non-metastatic tumors and metastatic tumors. And we dig the gut microbiome in patients with different treatments. We found that some microbiotas may be associated with prostate cancer progression and a special microbiome in metastatic prostate cancer may exist. The anti-androgen therapy can significantly change both the intratumor and gut microbiome.<br><br>CONCLUSION: With the progression and metastasis of prostate cancer, some intratumor microbiome changes. And anti-androgen influences both the intratumor and gut microbiome. Our discovery may help researchers further understand the progression, metastasis, and resistance of prostate cancer from the perspective of microbiome level.}, }
@article {pmid39881387, year = {2025}, author = {Pangga, GM and Star-Shirko, B and Psifidi, A and Xia, D and Corcionivoschi, N and Kelly, C and Hughes, C and Lavery, U and Richmond, A and Ijaz, UZ and Gundogdu, O}, title = {Impact of commercial gut health interventions on caecal metagenome and broiler performance.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {30}, pmid = {39881387}, issn = {2049-2618}, support = {BB/T008709/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom ; EP/V030515/1//Engineering and Physical Sciences Research Council/ ; }, mesh = {Animals ; *Chickens/microbiology/growth &amp; development ; Probiotics/administration &amp; dosage ; *Cecum/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Metagenome ; Prebiotics/administration &amp; dosage ; Animal Feed ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {BACKGROUND: Maintaining gut health is a persistent and unresolved challenge in the poultry industry. Given the critical role of gut health in chicken performance and welfare, there is a pressing need to identify effective gut health intervention (GHI) strategies to ensure optimal outcomes in poultry farming. In this study, across three broiler production cycles, we compared the metagenomes and performance of broilers provided with ionophores (as the control group) against birds subjected to five different GHI combinations involving vaccination, probiotics, prebiotics, essential oils, and reduction of ionophore use.<br><br>RESULTS: Using a binning strategy, 84 (&#x2265;&#x2009;75% completeness,&#x2009;&#x2264;&#x2009;5% contamination) metagenome-assembled genomes (MAGs) from 118 caecal samples were recovered and annotated for their metabolic potential. The majority of these (n&#x2009;=&#x2009;52, 61%) had a differential response across all cohorts and are associated with the performance parameter - European poultry efficiency factor (EPEF). The control group exhibited the highest EPEF, followed closely by the cohort where probiotics are used in conjunction with vaccination. The use of probiotics B, a commercial Bacillus strain-based formulation, was determined to contribute to the superior performance of birds. GHI supplementation generally affected the abundance of microbial enzymes relating to carbohydrate and protein digestion and metabolic pathways relating to energy, nucleotide synthesis, short-chain fatty acid synthesis, and drug-transport systems. These shifts are hypothesised to differentiate performance among groups and cycles, highlighting the beneficial role of several bacteria, including Rikenella microfusus and UBA7160 species.<br><br>CONCLUSIONS: All GHIs are shown to be effective methods for gut microbial modulation, with varying influences on MAG diversity, composition, and microbial functions. These metagenomic insights greatly enhance our understanding of microbiota-related metabolic pathways, enabling us to devise strategies against enteric pathogens related to poultry products and presenting new opportunities to improve overall poultry performance and health. Video Abstract.}, }
@article {pmid39881163, year = {2025}, author = {Dash, M and Thiyageshwari, S and Selvi, D and Johnson, HKV and Ariyan, M and Rajan, K and Anandham, R}, title = {Unveiling microbial diversity in slightly and moderately magnesium deficient acidic soils.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {3696}, pmid = {39881163}, issn = {2045-2322}, mesh = {*Soil Microbiology ; *Magnesium/analysis ; *Soil/chemistry ; RNA, Ribosomal, 16S/genetics ; India ; Metagenomics/methods ; *Bacteria/genetics/classification ; Biodiversity ; Microbiota ; Phosphorus/analysis ; Phylogeny ; }, abstract = {Magnesium (Mg) an essential plant nutrient is widespread deficient in the acidic soils of Nilgiris of Tamil nadu, India. The vegetable yield and quality is especially affected due to deficiency of nutrients like Mg. This study investigates soil characteristics and bacterial diversity in the Nilgiris district of Tamil Nadu, India, with respect to Mg deficiency. The soil samples were collected from different vegetable growing regions of the Nilgiris to assess soil physiocochemical parameters, soil enzymes and soil Mg status. 16S rRNA gene-based metagenomic analysis used to investigate the functional potential and structural diversity of the bacterial communities in high Mg and low Mg deficiency soil. Results indicated mildly acidic soils with a sandy loam texture and high organic carbon content. While nitrogen (N), phosphorus (P), and potassium (K) levels were adequate, Mg deficiency was consistent. Soil enzymes such as dehydrogenase, acid phosphatase, urease and aryl sulfatase, varied across the soil samples. Additionally, 16S rRNA gene-based metagenomics analysis revealed the bacterial diversity and functional pathways in soils with high and low Mg deficiency. Low Mg levels were associated with increased bacterial richness, dominated by Proteobacteria, Gemmatimonadetes, Actinobacteria, Bacteroidetes, and Acidobacteria. Functional pathways related to carbon metabolism, amino acid biosynthesis, and various metabolic processes were more abundant in low Mg deficient soils. This research highlights the significant influence of Mg levels on bacterial diversity and functional potentials in acidic soils, providing insights into soil management strategies in Mg-deficient regions.}, }
@article {pmid39880958, year = {2025}, author = {Maghini, DG and Oduaran, OH and Olubayo, LAI and Cook, JA and Smyth, N and Mathema, T and Belger, CW and Agongo, G and Boua, PR and Choma, SSR and Gómez-Olivé, FX and Kisiangani, I and Mashaba, GR and Micklesfield, L and Mohamed, SF and Nonterah, EA and Norris, S and Sorgho, H and Tollman, S and Wafawanaka, F and Tluway, F and Ramsay, M and Wirbel, J and ,  and Bhatt, AS and Hazelhurst, S}, title = {Expanding the human gut microbiome atlas of Africa.}, journal = {Nature}, volume = {638}, number = {8051}, pages = {718-728}, pmid = {39880958}, issn = {1476-4687}, support = {R01 AI148623/AI/NIAID NIH HHS/United States ; D43 TW010540/TW/FIC NIH HHS/United States ; R01 AI143757/AI/NIAID NIH HHS/United States ; U54 HG006938/HG/NHGRI NIH HHS/United States ; S10 OD023452/OD/NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/drug effects ; Female ; HIV Infections/microbiology/virology/epidemiology ; Metagenome/genetics ; Cross-Sectional Studies ; Adult ; Africa ; Metagenomics ; Burkina Faso ; Bacteria/classification/genetics/isolation &amp; purification/drug effects ; Young Adult ; Ghana ; Treponema/isolation &amp; purification/genetics ; Middle Aged ; South Africa ; Adolescent ; }, abstract = {Population studies provide insights into the interplay between the gut microbiome and geographical, lifestyle, genetic and environmental factors. However, low- and middle-income countries, in which approximately 84% of the world's population lives[1], are not equitably represented in large-scale gut microbiome research[2-4]. Here we present the AWI-Gen 2 Microbiome Project, a cross-sectional gut microbiome study sampling 1,801 women from Burkina Faso, Ghana, Kenya and South Africa. By engaging with communities that range from rural and horticultural to post-industrial and urban informal settlements, we capture a far greater breadth of the world's population diversity. Using shotgun metagenomic sequencing, we identify taxa with geographic and lifestyle associations, including Treponema and Cryptobacteroides species loss and Bifidobacterium species gain in urban populations. We uncover 1,005 bacterial metagenome-assembled genomes, and we identify antibiotic susceptibility as a factor that might drive Treponema succinifaciens absence in urban populations. Finally, we find an HIV infection signature defined by several taxa not previously associated with HIV, including Dysosmobacter welbionis and Enterocloster sp. This study represents the largest population-representative survey of gut metagenomes of African individuals so far, and paired with extensive clinical biomarkers and demographic data, provides extensive opportunity for microbiome-related discovery.}, }
@article {pmid39880110, year = {2025}, author = {Chen, N and Wang, L and Zhao, Z and Zhu, M and Li, Y}, title = {Impacts of aquaculture on nitrogen cycling and microbial community dynamics in coastal tidal flats.}, journal = {Environmental research}, volume = {270}, number = {}, pages = {120973}, doi = {10.1016/j.envres.2025.120973}, pmid = {39880110}, issn = {1096-0953}, mesh = {*Aquaculture ; *Nitrogen Cycle ; *Microbiota ; Nitrogen/metabolism ; Seasons ; Bacteria/metabolism ; China ; Wetlands ; }, abstract = {The expansion of aquaculture areas has encroached upon vast areas of coastal wetlands and introduced excessive nitrogen inputs, disrupting microbial communities and contributing to various environmental issues. However, investigations on how aquaculture affects microbial communities and nitrogen metabolism mechanisms in coastal tidal flats remain scarce. Hence, we explored the composition, diversity, and assembly processes of nitrogen-cycling (N-cycling) microbial communities in tidal flats in Jiangsu using metagenomic assembly methods. Our study further delved into the seasonal variations of these microbial characteristics to better explore the effects of seasonal changes in aquaculture areas on microbial community. Nitrogen metabolism-related processes and functional genes were identified through the KEGG and NCyc databases. The results revealed significant seasonal variation in the relative abundance and composition of microbial communities. Higher diversity was observed in winter, while the co-occurrence network of microbial communities was more complex in summer. Pseudomonadota emerged as the most abundant phylum in the N-cycling community. Furthermore, pH and NO3-N were identified as the primary factors influencing bacterial community composition, whereas NO2-N was more strongly associated with the N-cycling community. Regarding the nitrogen metabolism processes, nitrogen mineralization and nitrification were predominant in the tidal flat regions. NO2-N and NO3-N exhibited significant effects on several N-cycling functional genes (e.g., nirB, hao, and narG). Finally, neutral and null modeling analyses indicated that bacterial communities were predominantly shaped by stochastic processes, whereas N-cycling communities were largely driven by deterministic processes. These findings highlighted the significant role that aquaculture pollution plays in shaping the N-cycling communities in tidal flats. This underscored the importance of understanding microbial community dynamics and nitrogen metabolism in tidal flats to improve environmental management in coastal aquaculture areas.}, }
@article {pmid39876557, year = {2025}, author = {Morsink, MC and van Schaik, EN and Bossers, K and Duijker, DA and Speksnijder, AGCL}, title = {Metagenomics education in a modular CURE format positively affects students' scientific discovery perception and data analytical skills.}, journal = {Biochemistry and molecular biology education : a bimonthly publication of the International Union of Biochemistry and Molecular Biology}, volume = {53}, number = {3}, pages = {311-320}, doi = {10.1002/bmb.21888}, pmid = {39876557}, issn = {1539-3429}, mesh = {*Metagenomics/education ; *Students/psychology ; Humans ; Microbiota ; Animals ; Anthozoa/microbiology ; Computational Biology/education ; Curriculum ; }, abstract = {Targeted metagenomics is a rapidly expanding technology to analyze complex biological samples and genetic monitoring of environmental samples. In this research field, data analytical aspects play a crucial role. In order to teach targeted metagenomics data analysis, we developed a 4-week inquiry-driven modular course-based undergraduate research experience (mCURE) using publicly available Australian coral microbiome DNA sequencing data and associated metadata. Since an enormous amount of metadata was provided alongside the DNA sequencing data, groups of students were able to develop their own authentic research questions. Throughout the course, the student groups worked on these research questions and were supported with bioinformatics and statistics lessons. Additionally, practical aspects of data collection and analysis were addressed during hands-on field work on a nearby Dutch beach. Evaluation of the course indicated that the majority of students (1) achieved the intended metagenomics-based learning outcomes and (2) experienced scientific discovery while working on their research projects. In conclusion, the huge amount of data and metadata available in the coral microbiome data set facilitated the development of a strongly inquiry-driven course. Different groups of students were able to develop and conduct their own distinct microbiome research projects and our current mCURE format positively affected students' metagenomics data analytical skills and scientific discovery perception.}, }
@article {pmid39876003, year = {2025}, author = {Li, Q and Huo, J and Ni, G and Zhang, F and Zhang, S and Zhang, X and Wang, R and Jiao, J and Yu, Z and Pu, X and Yue, Y and Ungerfeld, EM and Zhang, X and Wu, J and Tan, Z and Greening, C and Wang, M}, title = {Reductive acetogenesis is a dominant process in the ruminant hindgut.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {28}, pmid = {39876003}, issn = {2049-2618}, mesh = {Animals ; *Rumen/microbiology ; Hydrogen/metabolism ; *Gastrointestinal Microbiome ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; Fermentation ; *Cecum/microbiology ; Goats/microbiology ; *Acetates/metabolism ; Fatty Acids, Volatile/metabolism ; Archaea/metabolism/classification/genetics/isolation &amp; purification ; Ruminants/microbiology ; Methane/metabolism ; }, abstract = {BACKGROUND: The microbes residing in ruminant gastrointestinal tracts play a crucial role in converting plant biomass to volatile fatty acids, which serve as the primary energy source for ruminants. This gastrointestinal tract comprises a foregut (rumen) and hindgut (cecum and colon), which differ in structures and functions, particularly with respect to feed digestion and fermentation. While the rumen microbiome has been extensively studied, the cecal microbiome remains much less investigated and understood, especially concerning the assembling microbial communities and overriding pathways of hydrogen metabolism.<br><br>RESULTS: To address this gap, we comparatively investigated the composition, capabilities, and activities of the rumen and the cecum microbiome using goats as an experimental ruminant model. In situ measurements showed significantly higher levels of dissolved hydrogen and acetate in the cecum than in the rumen. Increased dissolved hydrogen indicated distinct processes and reduced coupling between fermentative H2 production and utilization, whereas higher levels of acetate could be caused by slower VFA absorption through cecal papillae than through the rumen papillae. Microbial profiling indicated that the cecum harbors a greater abundance of mucin-degrading microbes and fermentative hydrogen producers, whereas the rumen contains a higher abundance of fibrolytic fermentative bacteria, hydrogenotrophic respiratory bacteria, and methanogenic archaea. Most strikingly, reductive acetogenic bacteria were 12-fold more abundant in the cecum. Genome-resolved metagenomic analysis unveiled that the cecum acetogens are both phylogenetically and functionally distinct from those found in the rumen. Further supporting these findings, two in vitro experiments demonstrated a marked difference in hydrogen metabolism pathways between the cecum and the rumen, with increased acetate production and reduced methanogenesis in the cecum. Moreover, comparative analysis across multiple ruminant species confirmed a strong enrichment of reductive acetogens in the hindguts, suggesting a conserved functional role.<br><br>CONCLUSIONS: These findings highlight an enrichment of acetogenesis in a key region of the gastrointestinal tract and reshape our understanding of ruminant hydrogen metabolism and how the H2 can be managed in accord to livestock methane mitigation efforts. Video Abstract.}, }
@article {pmid39875829, year = {2025}, author = {Zhang, Z and Zong, X and Liu, Z and Dong, X and Bai, H and Fan, L and Li, T}, title = {Comprehensive analysis of vaginal microbiota in Chinese women with genital tuberculosis: implications for diagnosis and treatment.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {52}, pmid = {39875829}, issn = {1471-2180}, support = {2024-4-2119//Capital's Funds for Health Improvement and Research/ ; FCYY201916//Special Training Program for Young and Middle-aged Subject Backbone of Beijing Obstetrics and Gynecology Hospital, Capital Medical University/ ; YQRC201906//"Excellent young Talents" project of Beijing Obstetrics and Gynecology Hospital, Capital Medical University/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology ; Adult ; *Tuberculosis, Female Genital/microbiology/diagnosis/drug therapy ; *Microbiota/genetics ; China ; Middle Aged ; Metagenomics ; *Bacteria/classification/genetics/isolation &amp; purification ; Young Adult ; RNA, Ribosomal, 16S/genetics ; Antitubercular Agents/therapeutic use ; East Asian People ; }, abstract = {BACKGROUND: Tuberculosis remains an infectious disease of global concern, with potential impacts on respiratory and intestinal microbiota owing to prolonged broad-spectrum antibiotic therapy. Despite its potential to cause infertility, the vaginal microbiota of women with genital tuberculosis remains poorly understood. We comprehensively analyzed the vaginal microbiota in Chinese women with genital tuberculosis.<br><br>RESULTS: We recruited women with pelvic (n&#x2009;=&#x2009;28), endometrial (n&#x2009;=&#x2009;16), and pulmonary (n&#x2009;=&#x2009;12) tuberculosis as the research group, and healthy women (n&#x2009;=&#x2009;11) as the control group. Vaginal discharges were collected for metagenomic analysis of its microbiota. The alpha diversity of the vaginal microbiota in women with genital tuberculosis was slightly higher than that in healthy women, though the difference was not statistically significant (P&#x2009;=&#x2009;0.23). Similarly, no significant differences in alpha diversity were observed between women with genital and pulmonary tuberculosis (P&#x2009;=&#x2009;0.82) or between those with pelvic and endometrial tuberculosis (P&#x2009;=&#x2009;0.82). Notably, the lowest alpha diversity was recorded six months to one year after initiating anti-tuberculosis treatment, with this decline being statistically significant (P&#x2009;=&#x2009;0.023). The dominance of Lactobacillus iners in the vaginal microbiota was more common in women with genital tuberculosis than that of Lactobacillus crispatus. Furthermore, the abundance of short-chain fatty acid -producing anaerobes, such as Actinomycetes, Streptococcus, and Finegoldia, were significantly increased. Short-chain fatty acid precursor pathways, including the ko03010 ribosome pathway, ko00970 aminoacyl-tRNA synthesis, ko00230 purine metabolism, ko00240 pyrimidine metabolism, and ko00010 glycolysis gluconeogenesis pathway, were significantly upregulated in women with endometrial tuberculosis.<br><br>CONCLUSIONS: Extrapulmonary tuberculosis, particularly genital tuberculosis and its associated vaginal dysbiosis impacts female fecundity. Vaginal dysbiosis is more pronounced when M. tuberculosis invades the endometrium. Given the effect of antibiotics on vaginal flora, probiotic combined interventions could be used as a future research direction.<br><br>CLINICAL TRIAL NUMBER: Not applicable.}, }
@article {pmid39875095, year = {2025}, author = {Moeller, AH}, title = {Partner fidelity, not geography, drives co-diversification of gut microbiota with hominids.}, journal = {Biology letters}, volume = {21}, number = {1}, pages = {20240454}, pmid = {39875095}, issn = {1744-957X}, support = {/GM/NIGMS NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Phylogeny ; *Hominidae/microbiology ; *Bacteria/genetics/classification ; Geography ; Genome, Bacterial ; }, abstract = {Bacterial strains that inhabit the gastrointestinal tracts of hominids have diversified in parallel (co-diversified) with their host species. The extent to which co-diversification has been mediated by partner fidelity between strains and hosts or by geographical distance between hosts is not clear due to a lack of strain-level data from clades of hosts with unconfounded phylogenetic relationships and geographical distributions. Here, I tested these competing hypotheses through meta-analyses of 7121 gut bacterial genomes assembled from wild-living ape species and subspecies sampled throughout their ranges in equatorial Africa. Across the gut bacterial phylogeny, strain diversification was more strongly associated with host phylogeny than with geography. In total, approximately 14% of the branch length of the gut bacterial phylogeny showed significant evidence of co-diversification independent of geography, whereas only approximately 4% showed significant evidence of diversification associated with geography independent of host phylogeny. Geographically co-occurring heterospecific hosts (Pan and Gorilla) universally maintained distinct co-diversified bacterial strains. Strains whose diversification was associated with geography independent of host phylogeny included clades of Proteobacteria known to adopt free-living lifestyles (e.g. Escherichia). These results show that co-diversification of gut bacterial strains with hominids has been driven primarily by fidelity of strains to host lineages rather than geography.}, }
@article {pmid39875062, year = {2025}, author = {Zhan, M and Li, Z and Chen, J and Zhao, Y and Bai, Z and Lu, B and Chen, H and Liu, Y}, title = {Indoxyl sulfate (IS) mediates pro-inflammatory responses in severe pneumonia in patients with rheumatoid arthritis associated interstitial lung disease.}, journal = {Clinical immunology (Orlando, Fla.)}, volume = {272}, number = {}, pages = {110430}, doi = {10.1016/j.clim.2025.110430}, pmid = {39875062}, issn = {1521-7035}, mesh = {Humans ; *Arthritis, Rheumatoid/complications/immunology ; *Lung Diseases, Interstitial/immunology/metabolism/complications ; Male ; Female ; *COVID-19/immunology/complications/metabolism ; Middle Aged ; Aged ; Bronchoalveolar Lavage Fluid/chemistry ; *Indican/metabolism/immunology ; SARS-CoV-2 ; Microbiota ; Neutrophils/immunology ; Lung/immunology ; *Pneumonia/immunology/metabolism ; Metabolomics ; }, abstract = {OBJECT: Patients with rheumatoid arthritis-associated interstitial lung disease (RA-ILD) have a high risk of serious infection, in particular severe pneumonia. This study aimed to investigate the transcriptional landscape, lower respiratory tract (LRT) microbiome and metabolomic profiles in the lung of RA-ILD patients with pneumonia.<br><br>METHOD: A total of 10 RA-ILD with pneumonia were enrolled in this study. In addition, 11 patients with COVID-19-associated pneumonia and 6 patients with non-autoimmune and non-COVID-19-related ILD with pneumonia were included as controls. Bronchoalveolar lavage fluid (BALF) was collected and prepared for metagenomic next-generation sequencing (mNGS), non-targeted metabolomics and bulk RNA-seq.<br><br>RESULT: Neutrophil-related genes were shared in the BALF cells of RA-ILD patients with pneumonia and patients with COVID-19-associated pneumonia. Carnobacterium, Wujia, Intestinimonas, Apibacter, Anaerotignum and Parvimonas were enriched in the LRT microbiome of RA-ILD, while Wujia, Apibacter, Pseudocitrobacter, and Thermobacillus were enriched in the LRT microbiome of COVID-19. Metabolomics analysis of BALF revealed significant elevation of indoxyl sulfate (IS) in the BALF of RA-ILD patients in comparison to COVID-19. Mechanistically, IS exerts an pro-inflammatory effect on macrophages and bronchial epithelial cells for pro-inflammatory cytokine production and potentiated neutrophils for neutrophil extracellular traps (NETs) formation.<br><br>CONCLUSIONS: Our results demonstrated a significant differences in the LRT microbiome and BALF metabolites between RA-ILD and COVID-19 patients with pneumonia, although they displayed similar local immune responses against lung infection. Alterations of LRT microbiome and related metabolites may be implicated in the pathogenesis of pneumonia in RA-ILD.}, }
@article {pmid39874761, year = {2025}, author = {Wang, R and Chen, J and Chen, H}, title = {Metagenomic insights into efficiency and mechanism of antibiotic resistome reduction by electronic mediators-enhanced microbial electrochemical system.}, journal = {Journal of hazardous materials}, volume = {488}, number = {}, pages = {137350}, doi = {10.1016/j.jhazmat.2025.137350}, pmid = {39874761}, issn = {1873-3336}, mesh = {*Bioelectric Energy Sources ; Metagenomics ; *Bacteria/genetics/drug effects ; *Drug Resistance, Microbial/genetics ; Electrochemical Techniques ; Graphite/chemistry ; Microbiota ; Charcoal/chemistry ; Genes, Bacterial ; }, abstract = {Electronic mediators are an effective means of enhancing the efficiency of microbial electrochemical electron transfer; however, there are still gaps in understanding the strengthening mechanisms and the efficiency of removing antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARB). This study systematically elucidates the effects of various electron mediators on bioelectrochemical processes, electron transfer efficiency, and the underlying mechanisms that inhibit ARG propagation within sediment microbial fuel cell systems (SMFCs). The results indicate that the addition of electron mediators significantly increased the output voltage (33.3 %-61.1 %) and maximum power density (14 %-106 %) of SMFCs, while also reducing ARB abundance and transmission risk. The enhancement effect follows the order of biochar, nanoscale zero-valent iron, graphene, and carbon nanotubes, with biochar emerging as the most economical and efficient choice for generating electricity and removing human pathogenic bacteria carrying ARGs. Procrustes analysis revealed that electron mediators facilitated the removal of ARGs by altering the structure of the microbiome, particularly the electricity-generating microorganisms (EGMs). Voltage and mobile genetic elements were the primary drivers of ARGs in the SMFCs. The network analysis results show that multiple carbohydrate-active enzymes, cluster of orthologous groups, and EGMs were negatively correlated with ARGs, indicating that the electron mediator-enhanced SMFCs mainly inhibit the spread of ARGs by promoting cell division, carbohydrate metabolism, and electricity generation. This study provides novel insights into how electron mediators affect ARG removal in microbial electrochemistry, which can inform economically viable strategies for sustainable environmental remediation.}, }
@article {pmid39874239, year = {2025}, author = {Zhou, H and Balint, D and Shi, Q and Vartanian, T and Kriegel, MA and Brito, I}, title = {Lupus and inflammatory bowel disease share a common set of microbiome features distinct from other autoimmune disorders.}, journal = {Annals of the rheumatic diseases}, volume = {84}, number = {1}, pages = {93-105}, pmid = {39874239}, issn = {1468-2060}, support = {DP2 HL141007/HL/NHLBI NIH HHS/United States ; R01 AI118855/AI/NIAID NIH HHS/United States ; UL1 TR001863/TR/NCATS NIH HHS/United States ; }, mesh = {Female ; Humans ; Male ; *Autoimmune Diseases/microbiology/immunology ; Biomarkers ; Colorectal Neoplasms/microbiology/immunology ; *Gastrointestinal Microbiome/immunology/genetics ; *Inflammatory Bowel Diseases/microbiology/immunology ; *Lupus Erythematosus, Systemic/microbiology/immunology ; Metagenome ; Metagenomics ; }, abstract = {OBJECTIVES: This study aims to elucidate the microbial signatures associated with autoimmune diseases, particularly systemic lupus erythematosus (SLE) and inflammatory bowel disease (IBD), compared with colorectal cancer (CRC), to identify unique biomarkers and shared microbial mechanisms that could inform specific treatment protocols.<br><br>METHODS: We analysed metagenomic datasets from patient cohorts with six autoimmune conditions-SLE, IBD, multiple sclerosis, myasthenia gravis, Graves' disease and ankylosing spondylitis-contrasting these with CRC metagenomes to delineate disease-specific microbial profiles. The study focused on identifying predictive biomarkers from species profiles and functional genes, integrating protein-protein interaction analyses to explore effector-like proteins and their targets in key signalling pathways.<br><br>RESULTS: Distinct microbial signatures were identified across autoimmune disorders, with notable overlaps between SLE and IBD, suggesting shared microbial underpinnings. Significant predictive biomarkers highlighted the diverse microbial influences across these conditions. Protein-protein interaction analyses revealed interactions targeting glucocorticoid signalling, antigen presentation and interleukin-12 signalling pathways, offering insights into possible common disease mechanisms. Experimental validation confirmed interactions between the host protein glucocorticoid receptor (NR3C1) and specific gut bacteria-derived proteins, which may have therapeutic implications for inflammatory disorders like SLE and IBD.<br><br>CONCLUSIONS: Our findings underscore the gut microbiome's critical role in autoimmune diseases, offering insights into shared and distinct microbial signatures. The study highlights the potential importance of microbial biomarkers in understanding disease mechanisms and guiding treatment strategies, paving the way for novel therapeutic approaches based on microbial profiles.<br><br>TRIAL REGISTRATION NUMBER: NCT02394964.}, }
@article {pmid39873521, year = {2025}, author = {Pu, G and Hou, L and Zhao, Q and Liu, G and Wang, Z and Zhou, W and Niu, P and Wu, C and Li, P and Huang, R}, title = {Interactions between gut microbes and host promote degradation of various fiber components in Meishan pigs.}, journal = {mSystems}, volume = {10}, number = {2}, pages = {e0150024}, pmid = {39873521}, issn = {2379-5077}, support = {32172710//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {Animals ; *Dietary Fiber/metabolism ; *Gastrointestinal Microbiome/physiology ; Swine/microbiology ; Cellulose/metabolism ; Animal Feed/analysis ; Fatty Acids, Volatile/metabolism ; *Host Microbial Interactions ; Pectins/metabolism ; Bacteria/metabolism/genetics/classification ; }, abstract = {UNLABELLED: Although metagenomic investigations into microbial fiber-degrading capabilities are currently prevalent, there is a notable gap in research concerning the regulatory mechanisms underpinning host-microbiota interactions that confer tolerance to high-fiber diets in pigs. In this study, 28 Meishan (MS) and 28 Large White (LW) pigs were subjected to feeding experiments involving various fiber levels. Subsequently, multi-omics was employed to investigate the influence of host-microbiota interactions on the fiber degradation of pigs. MS exhibited superior fiber digestibility compared with LW, particularly evident when fed a high-fiber diet. In MS, positive interactions among Treponema bryantii, Treponema sp., Rikenellaceae bacterium, and Bacteroidales bacterium WCE2004 facilitated the degradation of both cellulose and pectin. The reduced polymerization of polysaccharides and oligosaccharides observed in MS provides compelling evidence for their superior microbial fiber-degrading capability. The concentrations of propionate and butyrate retained in cecal lumen of MS was unchanged, whereas it was significantly increased in LW, indicating a strong absorption of short-chain fatty acids (SCFAs) in MS intestines. Correlation analysis using RNA-seq data revealed distinct patterns in LW and MS. In LW, microbial profiles along with GPR183 and GPR174 exhibited negative correlations with butyrate and propionate, respectively. Conversely, in MS, GPR174 and SLC2A4 were positively correlated with butyrate. Our findings underscore the dynamic collaboration among microbial species in degrading cellulose and pectin, coupled with the synergistic effects of SCFA transport-related genes, as crucial underpinnings for the heightened fiber digestibility observed in MS. These discoveries offer fresh perspectives into the intricate mechanisms governing host-microbiota interactions that influence fiber digestion in pigs.<br><br>IMPORTANCE: Studies on porcine intestinal microbiota have been widely conducted, and some microbial taxa with fiber degradation functions have been identified. However, the mechanisms of division among gut microbes in the degradation of complex fiber components are still unclear. In addition, the regulation of fiber digestion by host through absorption of short-chain fatty acids (SCFAs) needs to be further investigated. Our study used apparent total tract digestibility of dietary fiber to assess the utilization efficiency of dietary fiber between Meishan and Large White pigs. Subsequently, through metagenome sequencing and determination of fiber-degrading products, we found that in Meishan pigs, positive interactions among Treponema bryantii, Treponema sp., Rikenellaceae bacterium, and Bacteroidales bacterium WCE2004 facilitated the degradation of both cellulose and pectin. RNA-seq analysis elucidated breed-specific genes associated with SCFA absorption in cecum. By integrating multi-omics data, we constructed a framework outlining host-microbiota interactions that control dietary fiber utilization in pigs. Our data provide novel insights into host-microbiota interactions regulating fiber degradation and lay some theoretical foundations for improving the utilization efficiency of high-fiber cereal feed in pigs through targeted modulation of gut microbial function.}, }
@article {pmid39870396, year = {2025}, author = {Rytter, H and Naimi, S and Wu, G and Lewis, J and Duquesnoy, M and Vigué, L and Tenaillon, O and Belda, E and Vazquez-Gomez, M and Touly, N and Arnone, D and Hao, F and Ley, RE and Clément, K and Peyrin-Biroulet, L and Patterson, AD and Gewirtz, AT and Chassaing, B}, title = {In vitro microbiota model recapitulates and predicts individualised sensitivity to dietary emulsifier.}, journal = {Gut}, volume = {74}, number = {5}, pages = {761-774}, pmid = {39870396}, issn = {1468-3288}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Emulsifying Agents/pharmacology/adverse effects ; *Carboxymethylcellulose Sodium/pharmacology/adverse effects ; Animals ; Mice ; Male ; Interleukin-10/genetics ; Female ; }, abstract = {BACKGROUND: Non-absorbed dietary emulsifiers, including carboxymethylcellulose (CMC), directly disturb intestinal microbiota, thereby promoting chronic intestinal inflammation in mice. A randomised controlled-feeding study (Functional Research on Emulsifiers in Humans, FRESH) found that CMC also detrimentally impacts intestinal microbiota in some, but not all, healthy individuals.<br><br>OBJECTIVES: This study aimed to establish an approach for predicting an individual's sensitivity to dietary emulsifiers via their baseline microbiota.<br><br>DESIGN: We evaluated the ability of an in vitro microbiota model (MiniBioReactor Arrray, MBRA) to reproduce and predict an individual donor's sensitivity to emulsifiers. Metagenomes were analysed to identify signatures of emulsifier sensitivity.<br><br>RESULTS: Exposure of human microbiotas, maintained in the MBRA, to CMC recapitulated the differential CMC sensitivity previously observed in FRESH subjects. Furthermore, select FRESH control subjects (ie, not fed CMC) had microbiotas that were highly perturbed by CMC exposure in the MBRA model. CMC-induced microbiota perturbability was associated with a baseline metagenomic signature, suggesting the possibility of using one's metagenome to predict sensitivity to dietary emulsifiers. Transplant of human microbiotas that the MBRA model deemed CMC-sensitive, but not those deemed insensitive, into IL-10[-/-] germfree mice resulted in overt colitis following CMC feeding.<br><br>CONCLUSION: These results suggest that an individual's sensitivity to emulsifier is a consequence of, and can thus be predicted by, examining their baseline microbiota, paving the way to microbiota-based personalised nutrition.}, }
@article {pmid39870395, year = {2025}, author = {Nan, K and Zhong, Z and Yue, Y and Shen, Y and Zhang, H and Wang, Z and Zhuma, K and Yu, B and Fu, Y and Wang, L and Sun, X and Qu, M and Chen, Z and Guo, M and Zhang, J and Chu, Y and Liu, R and Miao, C}, title = {Fasting-mimicking diet-enriched Bifidobacterium pseudolongum suppresses colorectal cancer by inducing memory CD8[+] T cells.}, journal = {Gut}, volume = {74}, number = {5}, pages = {775-786}, doi = {10.1136/gutjnl-2024-333020}, pmid = {39870395}, issn = {1468-3288}, mesh = {Animals ; *Colorectal Neoplasms/immunology/diet therapy/microbiology ; Mice ; *CD8-Positive T-Lymphocytes/immunology ; *Gastrointestinal Microbiome/immunology ; *Probiotics ; *Fasting ; *Bifidobacterium ; Immunologic Memory ; Humans ; Disease Models, Animal ; Arginine/metabolism ; Male ; }, abstract = {BACKGROUND: Fasting-mimicking diet (FMD) boosts the antitumour immune response in patients with colorectal cancer (CRC). The gut microbiota is a key host immunity regulator, affecting physiological homeostasis and disease pathogenesis.<br><br>OBJECTIVE: We aimed to investigate how FMD protects against CRC via gut microbiota modulation.<br><br>DESIGN: We assessed probiotic species enrichment in FMD-treated CRC mice using faecal metagenomic sequencing. The candidate species were verified in antibiotic-treated conventional and germ-free mouse models. Immune landscape alterations were evaluated using single-cell RNA sequencing and multicolour flow cytometry. The microbiota-derived antitumour metabolites were identified using metabolomic profiling.<br><br>RESULTS: Faecal metagenomic profiling revealed Bifidobacterium pseudolongum enrichment in FMD-treated CRC mice. B. pseudolongum mediates the FMD antitumour effects by increasing the tissue-resident memory CD8[+] T-cell (TRM) population in CRC mice. The level of L-arginine, a B. pseudolongum functional metabolite, increased in FMD-treated CRC mice; furthermore, L-arginine induced the TRM phenotype in vivo and in vitro. Mechanistically, L-arginine is transported by the solute carrier family 7-member 1 (SLC7A1) receptor in CD8[+] T cells. Both FMD and B. pseudolongum improved anti-CTLA-4 efficacy in the orthotopic mouse CRC model. In FMD-treated patients with CRC, the CD8[+] TRM cell number increased as B. pseudolongum and L-arginine accumulated. The abundance of CD8[+] TRM cells and B. pseudolongum was associated with a better prognosis in patients with CRC.<br><br>CONCLUSION: B. pseudolongum contributes to the FMD antitumour effects in CRC by producing L-arginine. This promotes CD8[+] T-cell differentiation into memory cells. B. pseudolongum administration is a potential CRC therapeutic strategy.}, }
@article {pmid39868792, year = {2025}, author = {Zhou, Z and Yang, M and Fang, H and Niu, Y and Lu, J and Ma, Y and Zhang, B and Zhu, H and Chen, P}, title = {Interspecies interactions mediated by arginine metabolism enhance the stress tolerance of Fusobacterium nucleatum against Bifidobacterium animalis.}, journal = {Microbiology spectrum}, volume = {13}, number = {3}, pages = {e0223524}, pmid = {39868792}, issn = {2165-0497}, support = {24ZDFA001//Gansu Provincial Science and Technology Major Project/ ; 2024-8-27,2024-8-30,2024-4-2//The Lanzhou Municipal Science and Technology Program/ ; 20240260001,20240260017//the College Students' Innovation and Entrepreneurship Program of Lanzhou University, China/ ; }, mesh = {Humans ; *Fusobacterium nucleatum/metabolism/genetics/physiology/growth &amp; development ; Probiotics ; *Bifidobacterium animalis/genetics/metabolism/physiology/growth &amp; development ; *Arginine/metabolism ; Colorectal Neoplasms/microbiology ; Gastrointestinal Microbiome ; Phylogeny ; Whole Genome Sequencing ; Metabolic Networks and Pathways ; Microbial Interactions ; Anti-Bacterial Agents/pharmacology ; Dysbiosis/microbiology ; }, abstract = {Colorectal cancer (CRC) is a common cancer accompanied by microbiome dysbiosis. Exploration of probiotics against oncogenic microorganisms is promising for CRC treatment. Here, differential microorganisms between CRC and healthy control were analyzed. Antibacterial experiments, whole-genome sequencing, and metabolic network reconstruction were combined to reveal the anti-Fusobacterium nucleatum mechanism, which was verified by co-culture assay and mendelian randomization analysis. Sequencing results showed that F. nucleatum was enriched in CRC, yet Bifidobacterium animalis decreased gradually from healthy to CRC. Additionally, F. nucleatum could be inhibited by B. animalis. Whole-genome sequencing of B. animalis showed high phylogenetic similarity with known probiotic strains and highlighted its functions for amino acid and carbohydrate metabolism. Metabolic network reconstruction demonstrated that cross-feeding and specific metabolites (acidic molecules, arginine) had a great influence on the coexistence relationship. Finally, the arginine supplement enhanced the competitive ability of F. nucleatum against B. animalis, and the mendelian randomization and metagenomic sequencing analysis confirmed the positive relationship among F. nucleatum, arginine metabolism, and CRC. Thus, whole-genome sequencing and metabolic network reconstruction are valuable for probiotic mining and patient dietary guidance.IMPORTANCEUsing probiotics to inhibit oncogenic microorganisms (Fusobacterium nucleatum) is promising for colorectal cancer (CRC) treatment. In this study, whole-genome sequencing and metabolic network reconstruction were combined to reveal the anti-F. nucleatum mechanism of Bifidobacterium animalis, which was verified by co-culture assay and mendelian randomization analysis. The result indicated that the arginine supplement enhanced the competitive ability of F. nucleatum, which may be harmful to F. nucleatum-infected CRC patients. B. animalis is a potential probiotic to relieve this dilemma. Thus, using in silico simulation methods based on flux balance analysis, such as genome-scale metabolic reconstruction, provides valuable insights for probiotic mining and dietary guidance for cancer patients.}, }
@article {pmid39868213, year = {2025}, author = {Schechter, MS and Trigodet, F and Veseli, IA and Miller, SE and Klein, ML and Sever, M and Maignien, L and Delmont, TO and Light, SH and Eren, AM}, title = {Ribosomal protein phylogeography offers quantitative insights into the efficacy of genome-resolved surveys of microbial communities.}, journal = {bioRxiv : the preprint server for biology}, volume = {}, number = {}, pages = {}, pmid = {39868213}, issn = {2692-8205}, support = {T32 GM007197/GM/NIGMS NIH HHS/United States ; }, abstract = {The increasing availability of microbial genomes is essential to gain insights into microbial ecology and evolution that can propel biotechnological and biomedical advances. Recent advances in genome recovery have significantly expanded the catalogue of microbial genomes from diverse habitats. However, the ability to explain how well a set of genomes account for the diversity in a given environment remains challenging for individual studies or biome-specific databases. Here we present EcoPhylo, a computational workflow to characterize the phylogeography of any gene family through integrated analyses of genomes and metagenomes, and our application of this approach to ribosomal proteins to quantify phylogeny-aware genome recovery rates across three biomes. Our findings show that genome recovery rates vary widely across taxa and biomes, and that single amplified genomes, metagenome-assembled genomes, and isolate genomes have non-uniform yet quantifiable representation of environmental microbes. EcoPhylo reveals highly resolved, reference-free, multi-domain phylogenies in conjunction with distribution patterns of individual clades across environments, providing a means to assess genome recovery in individual studies and benchmark biome-level genome collections.}, }
@article {pmid39867343, year = {2024}, author = {Guimarães, LO and Ribeiro, GO and da Couto, R and Ramos, EDSF and Morais, VDS and Telles-de-Deus, J and Helfstein, VC and Dos Santos, JM and Deng, X and Delwart, E and Pandey, RP and de Camargo-Neves, VLF and da Costa, AC and Kirchgatter, K and Leal, &#xc9;}, title = {Exploring mosquito virome dynamics within São Paulo Zoo: insights into mosquito-virus-environment interactions.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1496126}, pmid = {39867343}, issn = {2235-2988}, mesh = {Animals ; *Virome ; Brazil ; *Mosquito Vectors/virology ; Metagenomics ; *Culicidae/virology ; Aedes/virology ; *Viruses/classification/genetics/isolation &amp; purification ; Anopheles/virology ; Metagenome ; Culex/virology ; Ecosystem ; Animals, Zoo/virology ; }, abstract = {BACKGROUND: Mosquito-borne diseases have a significant public health threat worldwide, with arboviruses accounting for a high proportion of infectious diseases and mortality annually. Brazil, in particular, has been suffering outbreaks of diseases transmitted by mosquito viruses, notably those of the Aedes genus, such as dengue, Zika, and chikungunya. Against this background, the São Paulo Zoo is an intriguing ecological niche to explore the virome of mosquitoes, potentially shedding light on the dynamics of arbovirus transmission within a confined setting.<br><br>METHODS: In this study, we conducted a comprehensive metagenomic analysis of mosquitoes collected from diverse habitats within the zoo, focusing on the Aedes, Anopheles, and Culex genera. From 1,039 contigs of viral origin, we identified 229 viral species infecting mosquitoes, with the orders Picornavirales, Nodamuvirales and Sobelivirales being the most prevalent and abundant. The difference in virome composition was primarily driven by mosquito host species rather than specific collection sites or trap height.<br><br>RESULTS: Despite environmental disparities, the virome remained remarkably uniform across different areas of the zoo, emphasizing the strong association between mosquito species and their viral communities. Furthermore, we identified a core virome shared among mosquito species, highlighting potential cross-species transmission events and underscoring the need for targeted surveillance and control measures.<br><br>CONCLUSION: These results contribute to our understanding of the interplay between mosquitoes, the environment, and viruses, providing valuable insights for disease intervention strategies in mosquito-borne diseases.}, }
@article {pmid39866568, year = {2025}, author = {Pucci, N and Ujčič-Voortman, J and Verhoeff, AP and Mende, DR}, title = {Priority effects, nutrition and milk glycan-metabolic potential drive Bifidobacterium longum subspecies dynamics in the infant gut microbiome.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e18602}, pmid = {39866568}, issn = {2167-8359}, mesh = {Humans ; *Gastrointestinal Microbiome ; Infant ; *Milk, Human/metabolism/microbiology ; *Polysaccharides/metabolism ; Female ; *Bifidobacterium longum/metabolism/genetics ; Infant, Newborn ; Male ; Bifidobacterium ; }, abstract = {BACKGROUND: The initial colonization of the infant gut is a complex process that defines the foundation for a healthy microbiome development. Bifidobacterium longum is one of the first colonizers of newborns' gut, playing a crucial role in the healthy development of both the host and its microbiome. However, B. longum exhibits significant genomic diversity, with subspecies (e.g., Bifidobacterium longum subsp. infantis and subsp. longum) displaying distinct ecological and metabolic strategies including differential capabilities to break down human milk glycans (HMGs). To promote healthy infant microbiome development, a good understanding of the factors governing infant microbiome dynamics is required.<br><br>METHODOLOGY: We analyzed newly sequenced gut microbiome samples of mother-infant pairs from the Amsterdam Infant Microbiome Study (AIMS) and four publicly available datasets to identify important environmental and bifidobacterial features associated with the colonization success and succession outcomes of B. longum subspecies. Metagenome-assembled genomes (MAGs) were generated and assessed to identify characteristics of B. longum subspecies in relation to early-life gut colonization. We further implemented machine learning tools to identify significant features associated with B. longum subspecies abundance.<br><br>RESULTS: B. longum subsp. longum was the most abundant and prevalent gut Bifidobacterium at one month, being replaced by B. longum subsp. infantis at six months of age. By utilizing metagenome-assembled genomes (MAGs), we reveal significant differences between and within B. longum subspecies in their potential to break down HMGs. We further combined strain-tracking, meta-pangenomics and machine learning to understand these abundance dynamics and found an interplay of priority effects, milk-feeding type and HMG-utilization potential to govern them across the first six months of life. We find higher abundances of B. longum subsp. longum in the maternal gut microbiome, vertical transmission, breast milk and a broader range of HMG-utilizing genes to promote its abundance at one month of age. Eventually, we find B. longum subsp. longum to be replaced by B. longum subsp. infantis at six months of age due to a combination of nutritional intake, HMG-utilization potential and a diminishment of priority effects.<br><br>DISCUSSION: Our results establish a strain-level ecological framework explaining early-life abundance dynamics of B. longum subspecies. We highlight the role of priority effects, nutrition and significant variability in HMG-utilization potential in determining the predictable colonization and succession trajectories of B. longum subspecies, with potential implications for promoting infant health and well-being.}, }
@article {pmid39865153, year = {2025}, author = {Wu, Z and Jiang, M and Jia, M and Sang, J and Wang, Q and Xu, Y and Qi, L and Yang, W and Feng, L}, title = {The difference of oropharyngeal microbiome during acute respiratory viral infections in infants and children.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {127}, pmid = {39865153}, issn = {2399-3642}, support = {2022-I2M-CoV19-006//Chinese Academy of Medical Sciences (CAMS)/ ; }, mesh = {Humans ; *Oropharynx/microbiology/virology ; *Microbiota ; Infant ; *Respiratory Tract Infections/virology/microbiology ; Child, Preschool ; Male ; Female ; Child ; *Virus Diseases/virology/microbiology ; Acute Disease ; Viruses/classification/genetics ; }, abstract = {Acute respiratory infections (ARI) with multiple types of viruses are common in infants and children. This study was conducted to assess the difference of oropharyngeal microbiome during acute respiratory viral infection using whole-genome shotgun metagenomic sequencing. The overall taxonomic alpha diversity did not differ by the types of infected virus. The beta diversity differed by disease severity, disease-related symptoms, and types of infected virus. Nine species had significantly higher abundance in outpatients than in inpatients, with five of them in the genus Achromobacter. Three microbial community types were identified. The prevalence of community type (CT) 1 was higher among patients with influenza virus, enterovirus, and human adenvirus; CT2 was higher among patients with human metapneumovirus; and CT3 was higher among patients with respiratory syncytial virus and human adenvirus infections. Our results suggest that the oropharyngeal microbiome is associated with ARI disease severity, disease-related symptoms, and the types of infected virus.}, }
@article {pmid39864798, year = {2025}, author = {Nehra, C and Harshini, V and Shukla, N and Chavda, P and Bhure, M and Savaliya, K and Patil, S and Shah, T and Pandit, R and Patil, NV and Patel, AK and Kachhawaha, S and Kumawat, RN and Joshi, M and Joshi, CG}, title = {Ruminal microbial responses to Moringa oleifera feed in lactating goats (Capra hircus): A metagenomic exploration.}, journal = {New biotechnology}, volume = {86}, number = {}, pages = {87-96}, doi = {10.1016/j.nbt.2025.01.006}, pmid = {39864798}, issn = {1876-4347}, mesh = {Animals ; *Goats/microbiology ; *Moringa oleifera/chemistry ; *Lactation ; *Animal Feed ; *Rumen/microbiology ; *Metagenomics ; Female ; Milk/metabolism ; Bacteria/genetics ; *Gastrointestinal Microbiome ; }, abstract = {The purpose of the current study was to explore the effects of Moringa oleifera feed on the taxonomy and function of the rumen microbial community, and further to evaluate its impact on milk yield and body weight in lactating goats. Nineteen goats were divided into moringa leaf diet (ML; n = 10) and masoor straw (MS; n = 9) groups. For each group fortnight milk yield and body weight was recorded. Rumen solid and liquid fraction samples were processed for metagenomic shotgun sequencing and further analysed. The pairwise comparison between the two groups showed a significant increase (p-value- <0.01) in milk yield of the ML goats after the 4th fortnight interval onwards. The metagenomic analysis revealed Bacteroidetes and Firmicutes are the most abundant phyla, with increased Bacteroidetes in response to the moringa diet. The ML group exhibited a reduction in microbial diversity, with an increase in Prevetolla and Bacteroidales populations which are positively associated with carbohydrate, protein, and VFA metabolism, and an increased proportions of Treponema sp., Ruminococcus sp., Ruminobacter amylophilus, and Aeromonas, indicating improved cellulose and nitrogen metabolism. KEGG analysis revealed significant changes in microbial gene pool and metabolic pathways, particularly in carbohydrate metabolism, propanoate metabolism, and fatty acid synthesis genes. These microbial and functional shifts are correlated with improvements in milk yield, growth rates, and potentially reduced methane emissions.This study highlighted the potential benefits of feeding moringa in the animal production system. However, furthermore experimental evidence including genetic and environmental effects is needed for a comprehensive understanding of moringa feed's impact on goat health and productivity.}, }
@article {pmid39864304, year = {2025}, author = {Labarga, D and Mairata, A and Puelles, M and Wallner, A and Aziz, A and Alícia, P}, title = {Rootstocks and drought stress impact the composition and functionality of grapevine rhizosphere bacterial microbiota.}, journal = {Microbiological research}, volume = {293}, number = {}, pages = {128073}, doi = {10.1016/j.micres.2025.128073}, pmid = {39864304}, issn = {1618-0623}, mesh = {*Rhizosphere ; *Droughts ; *Vitis/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Microbiota ; Soil Microbiology ; *Plant Roots/microbiology ; *Stress, Physiological ; Metagenomics ; Biodiversity ; }, abstract = {The microbiota, a component of the plant holobiont, plays an active role in the response to biotic and abiotic stresses. Nowadays, with recurrent drought and global warming, a growing challenge in viticulture is being addressed by different practices, including the use of adapted rootstocks. However, the relationships between these practices, abiotic stress and the composition and functions of the rhizosphere microbiota remain to be deciphered. This study aimed to unravel the impact of five rootstocks, water management and the combination of both on the rhizosphere bacterial microbiota in grapevines using shotgun metagenomics approach. The results showed that drought impacted the diversity, composition and functionality of the rhizosphere bacterial community. The genera Mycolicibacterium, Mycobacterium and Rhodococcus, and the bacterial functions, including DNA damage repair, fatty acid synthesis, sugar and amino acid transport, oxidative stress reduction, toxin synthesis and detoxification of exogenous compounds were significantly enriched under drought conditions. Rootstocks also significantly affected the rhizosphere bacterial richness but its influence on diversity and functionality compared to water management was weaker. Some taxa and function could be linked to water managements applied. The interaction between rootstocks and water management further influenced the rhizosphere composition, especially under drought conditions, where distinct clustering was observed for specific rootstocks. The results highlight the importance of conducting multifactorial studies to better understand their impact on shaping functional rhizosphere bacterial communities. This study paves the way for future research on beneficial bacterial inoculation and genetic engineering of rootstock to cope with drought stress.}, }
@article {pmid39864165, year = {2025}, author = {Wang, XP and Han, NN and Yang, JH and Fan, NS and Jin, RC}, title = {Metagenomic insight into the diffusion signal factor mediated social traits of anammox consortia after starvation.}, journal = {Journal of environmental management}, volume = {375}, number = {}, pages = {124270}, doi = {10.1016/j.jenvman.2025.124270}, pmid = {39864165}, issn = {1095-8630}, mesh = {Oxidation-Reduction ; Anaerobiosis ; Ammonium Compounds/metabolism ; Wastewater/microbiology ; Nitrogen/metabolism ; Quorum Sensing ; Bacteria/metabolism ; *Microbial Consortia ; Metagenomics ; }, abstract = {Biomass starvation is common in biological wastewater treatment. As a social trait of microbial community, how quorum sensing (QS) regulated bacterial trade-off through interactions after starvation remains unclear. This study deciphered the mechanism of anaerobic ammonium oxidation (anammox) consortia in response to starvation, including reducing extracellular electron transfer (EET), adenosine 5'-triphosphate (ATP) content and amino acid metabolism. Metagenomic analysis has shown that the addition of the diffusion signal factor (DSF) resulted in a high abundance of antioxidant genes, which contributed to achieving redox balance in anammox bacteria. There was an enrichment of Geobacter and Methanosarcina, which were QS-responsive direct interspecific electron transfer participants. Furthermore, DSF stimulated the nitrogen and carbon metabolism of Ca. Kuenenia_stuttgartiensis, promoting syntrophy of metabolic intermediates within microbial community. This study highlighted the effect of DSF on the microbial interaction patterns and deciphered the QS-based social traits of anammox consortia after starvation, facilitating the stable operation of the anammox process.}, }
@article {pmid39861970, year = {2025}, author = {Saati-Santamaría, Z and Navarro-Gómez, P and Martínez-Mancebo, JA and Juárez-Mugarza, M and Flores, A and Canosa, I}, title = {Genetic and species rearrangements in microbial consortia impact biodegradation potential.}, journal = {The ISME journal}, volume = {19}, number = {1}, pages = {}, pmid = {39861970}, issn = {1751-7370}, support = {//University of Seville from the Ministry of Universities/ ; CLU-2018-04//Regional Government of Castilla y Le&#xf3;n/ ; //European NextGenerationEU program/ ; //University of Salamanca/ ; 101090267//EU Horizon Europe program/ ; ProyExcel_00358//Programa de Excelencia de la Junta de Andaluc&#xed;a/ ; //V Plan Propio de investigaci&#xf3;n of the University Pablo de Olavide/ ; }, mesh = {*Microbial Consortia/genetics ; Biodegradation, Environmental ; Plasmids/genetics ; *Ibuprofen/metabolism ; *Bacteria/genetics/metabolism/classification ; Gene Transfer, Horizontal ; Wastewater/microbiology ; Phylogeny ; }, abstract = {Genomic reorganisation between species and horizontal gene transfer have been considered the most important mechanism of biological adaptation under selective pressure. Still, the impact of mobile genes in microbial ecology is far from being completely understood. Here we present the collection and characterisation of microbial consortia enriched from environments contaminated with emerging pollutants, such as non-steroidal anti-inflammatory drugs. We have obtained and further enriched two ibuprofen-degrading microbial consortia from two unrelated wastewater treatment plants. We have also studied their ability to degrade the drug and the dynamics of the re-organisations of the genetic information responsible for its biodegradation among the species within the consortium. Our results show that genomic reorganisation within microorganisms and species rearrangements occur rapidly and efficiently during the selection process, which may be facilitated by plasmids and/or transposable elements located within the sequences. We show the evolution of at least two different plasmid backbones on samples from different locations, showing rearrangements of genomic information, including genes encoding activities for IBU degradation. As a result, we found variations in the expression pattern of the consortia after evolution under selective pressure, as an adaptation process to the new conditions. This work provides evidence for changes in the metagenomes of microbial communities that allow adaptation under a selective constraint -ibuprofen as a sole carbon source- and represents a step forward in knowledge that can inspire future biotechnological developments for drug bioremediation.}, }
@article {pmid39861468, year = {2025}, author = {Fricker, AD and Sejane, K and Desai, M and Snyder, MW and Duran, L and Mackelprang, R and Bode, L and Ross, MG and Flores, GE}, title = {A Pilot Study Exploring the Relationship Between Milk Composition and Microbial Capacity in Breastfed Infants.}, journal = {Nutrients}, volume = {17}, number = {2}, pages = {}, pmid = {39861468}, issn = {2072-6643}, support = {R21 HD104028/HD/NICHD NIH HHS/United States ; SC1GM136546/GM/NIGMS NIH HHS/United States ; R01 HD099813/HD/NICHD NIH HHS/United States ; SC1 GM136546/GM/NIGMS NIH HHS/United States ; R01HD099813/HD/NICHD NIH HHS/United States ; R21HD104028/HD/NICHD NIH HHS/United States ; }, mesh = {Humans ; *Milk, Human/chemistry/microbiology ; Pilot Projects ; *Gastrointestinal Microbiome ; Female ; Infant ; *Breast Feeding ; *Oligosaccharides/analysis/metabolism ; Cross-Sectional Studies ; Adult ; Male ; Feces/microbiology ; RNA, Ribosomal, 16S/genetics ; Body Mass Index ; Bacteria/classification/genetics ; Overweight/microbiology ; }, abstract = {BACKGROUND: Maternal obesity may contribute to childhood obesity in a myriad of ways, including through alterations of the infant gut microbiome. For example, maternal obesity may contribute both directly by introducing a dysbiotic microbiome to the infant and indirectly through the altered composition of human milk that fuels the infant gut microbiome. In particular, indigestible human milk oligosaccharides (HMOs) are known to shape the composition of the infant gut microbiome. The goal of this study was to characterize the HMO profiles of normal-weight and overweight mothers and to quantitatively link HMO concentrations to the taxonomic composition and functional potential of the infant gut microbiome.<br><br>METHODS: Normal-weight (BMI = 18.5-24.9; n = 9) and overweight/obese (OW/OB; BMI > 25; n = 11) breastfeeding mothers and their infants were enrolled in this single-center, cross-sectional pilot study. Human milk from the mothers and rectal stool swabs from the infants were collected 7-9 weeks postpartum. The HMO composition, microbiome composition, and microbial functions were assessed using HPLC, 16S rRNA gene sequencing, and metagenomic sequencing, respectively.<br><br>RESULTS: Neither the HMO profiles nor the infant microbiome composition varied according to maternal BMI status. Taxonomically, the gut microbiota of infants were dominated by typical gut lineages including Bifidobacterium. Significant correlations between individual HMOs and bacterial genera were identified, including for Prevotella, a genus of the Bacteroidota phylum that was positively correlated with the concentrations of lacto-N-neotetraose (LNnT) and lacto-N-hexaose (LNH). Using metagenomic assembled genomes, we were also able to identify the broad HMO-degradative capacity across the Bifidobacterium and Prevotella genera.<br><br>CONCLUSIONS: These results suggest that the maternal BMI status does not impact the HMO profiles of human milk. However, select HMOs were correlated with specific bacterial taxa, suggesting that the milk composition influences both the taxonomic composition and the functional capacity of the infant gut microbiome.}, }
@article {pmid39860966, year = {2024}, author = {Laryushina, Y and Samoilova-Bedych, N and Turgunova, L and Marchenko, A and Turgunov, Y and Kozhakhmetov, S and Suieubayev, M and Mukhanbetzhanov, N and Kabdulina, N}, title = {Interrelationships of the Intestinal Microbiome, Trimethylamine N-Oxide and Lipopolysaccharide-Binding Protein with Crohn's Disease Activity.}, journal = {Pathogens (Basel, Switzerland)}, volume = {14}, number = {1}, pages = {}, pmid = {39860966}, issn = {2076-0817}, support = {AP14871959//Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan/ ; }, mesh = {Humans ; *Methylamines/metabolism/analysis ; *Gastrointestinal Microbiome ; *Crohn Disease/microbiology/pathology/metabolism ; Male ; Female ; Adult ; *Carrier Proteins/metabolism/analysis ; Middle Aged ; Feces/microbiology/chemistry ; *Acute-Phase Proteins/metabolism ; *Membrane Glycoproteins/metabolism/analysis ; Young Adult ; }, abstract = {UNLABELLED: Crohn's disease (CD) is a multifactorial inflammatory bowel disease whose pathogenetic mechanisms are a field of ongoing study. Changes in the intestinal microbiome in CD may influence metabolite production and reflect the disease's severity. We investigate the relationship between trimethylamine N-oxide (TMAO) and lipopolysaccharide-binding protein (LPS) levels and changes in the gut microbiome in patients with CD of various degrees of activity.<br><br>METHODS: In total, 29 CD patients and 15 healthy individuals were investigated for their levels of TMAO by HPLC-MS, and LPS protein by ELISA and metagenomic 16 s-sequencing of feces was performed.<br><br>RESULTS: We found significant differences in TMAO levels in patients in the remission/mild and moderate/severe groups compared to the control group (p = 0.02 and p = 0.014), changes in alpha diversity with the Shannon index (p = 0. 0151 and p = 0.0018) and in beta diversity (ANOSIM p = 0.009 and PERMANOVA p = 0.005) in both groups compared to controls. Strongly positive correlations in TMAO levels and mixed correlations of LPS with alpha diversity metrics were found, as well as significant correlations with microbiota species.<br><br>CONCLUSIONS: Changes in the level of metabolites may reflect specific disturbances in the composition of the intestinal microbiome at different degrees of severity of CD.}, }
@article {pmid39859429, year = {2025}, author = {Vicente-Valor, J and Tesolato, S and Paz-Cabezas, M and Gómez-Garre, D and Ortega-Hernández, A and de la Serna, S and Domínguez-Serrano, I and Dziakova, J and Rivera, D and Jarabo, JR and Gómez-Martínez, AM and Hernando, F and Torres, A and Iniesta, P}, title = {Fecal Microbiota Strongly Correlates with Tissue Microbiota Composition in Colorectal Cancer but Not in Non-Small Cell Lung Cancer.}, journal = {International journal of molecular sciences}, volume = {26}, number = {2}, pages = {}, pmid = {39859429}, issn = {1422-0067}, support = {PI19/00073//Carlos III Health Institute (Ministerio de Econom&#xed;a y Competitividad), Spain and co-funded by the European Union through the European Regional Development Fund (ERDF) 'A way to make Europe'/ ; }, mesh = {Humans ; *Feces/microbiology ; *Carcinoma, Non-Small-Cell Lung/microbiology/diagnosis ; *Colorectal Neoplasms/microbiology/diagnosis ; *Lung Neoplasms/microbiology/diagnosis ; Male ; Female ; Middle Aged ; Aged ; RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome ; *Microbiota ; }, abstract = {Microbiota could be of interest in the diagnosis of colorectal and non-small cell lung cancer (CRC and NSCLC). However, how the microbial components of tissues and feces reflect each other remains unknown. In this work, our main objective is to discover the degree of correlation between the composition of the tissue microbiota and that of the feces of patients affected by CRC and NSCLC. Specifically, we investigated tumor and non-tumor tissues from 38 recruited patients with CRC and 19 with NSCLC. DNA from samples was submitted for 16S rDNA metagenomic sequencing, followed by data analysis through the QIIME2 pipeline and further statistical processing with STATA IC16. Tumor and non-tumor tissue selected genera were highly correlated in both CRC and NSCLC (100% and 81.25%). Following this, we established tissue-feces correlations, using selected genera from a LEfSe analysis previously published. In CRC, we found a strong correlation between the taxa detected in feces and those from colorectal tissues. However, our data do not demonstrate this correlation in NSCLC. In conclusion, our findings strongly reinforce the utility of fecal microbiota as a non-invasive biomarker for CRC diagnosis, while highlighting critical distinctions for NSCLC. Furthermore, our data demonstrate that the microbiota components of tumor and non-tumor tissues are similar, with only minor differences being detected.}, }
@article {pmid39856742, year = {2025}, author = {Benitez, AJ and Tanes, C and Friedman, ES and Zackular, JP and Ford, E and Gerber, JS and DeRusso, PA and Kelly, A and Li, H and Elovitz, MA and Wu, GD and Zemel, B and Bittinger, K}, title = {Antibiotic exposure is associated with minimal gut microbiome perturbations in healthy term infants.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {21}, pmid = {39856742}, issn = {2049-2618}, support = {UL1 TR001878/TR/NCATS NIH HHS/United States ; UL1TR001878//NIH National Center for Research Resources Clinical and Translational Science Program/ ; KL2 TR001879/TR/NCATS NIH HHS/United States ; unrestricted donation//American Beverage Foundation for a Healthy America/ ; R01DK107565/DK/NIDDK NIH HHS/United States ; R35GM138369/GM/NIGMS NIH HHS/United States ; KL2TR001879/TR/NCATS NIH HHS/United States ; R01 DK107565/DK/NIDDK NIH HHS/United States ; R35 GM138369/GM/NIGMS NIH HHS/United States ; }, mesh = {Child, Preschool ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; *Anti-Bacterial Agents/pharmacology/administration &amp; dosage/adverse effects ; *Bacteria/classification/genetics/drug effects/isolation &amp; purification ; Bile Acids and Salts/analysis ; Black or African American ; Breast Feeding ; Feces/microbiology/chemistry ; *Gastrointestinal Microbiome/drug effects/genetics ; Longitudinal Studies ; Metagenomics/methods ; Prospective Studies ; }, abstract = {BACKGROUND: The evolving infant gut microbiome influences host immune development and later health outcomes. Early antibiotic exposure could impact microbiome development and contribute to poor outcomes. Here, we use a prospective longitudinal birth cohort of n = 323 healthy term African American children to determine the association between antibiotic exposure and the gut microbiome through shotgun metagenomics sequencing as well as bile acid profiles through liquid chromatography-mass spectrometry.<br><br>RESULTS: Stool samples were collected at ages 4, 12, and 24&#xa0;months for antibiotic-exposed (n&#x2009;=&#x2009;170) and unexposed (n&#x2009;=&#x2009;153) participants. A short-term substudy (n&#x2009;=&#x2009;39) collected stool samples at first exposure, and over 3&#xa0;weeks following antibiotics initiation. Antibiotic exposure (predominantly amoxicillin) was associated with minimal microbiome differences, whereas all tested taxa were modified by breastfeeding. In the short-term substudy, we observed microbiome differences only in the first 2&#xa0;weeks following antibiotics initiation, mainly a decrease in Bifidobacterium bifidum. The differences did not persist a month after antibiotic exposure. Four species were associated with infant age. Antibiotic exposure was not associated with an increase in antibiotic resistance gene abundance or with differences in microbiome-derived fecal bile acid composition.<br><br>CONCLUSIONS: Short-term and long-term gut microbiome perturbations by antibiotic exposure were detectable but substantially smaller than those associated with breastfeeding and infant age.}, }
@article {pmid39856709, year = {2025}, author = {Li, D and Chen, W and Luo, W and Zhang, H and Liu, Y and Shu, D and Wei, G}, title = {Seed microbiomes promote Astragalus mongholicus seed germination through pathogen suppression and cellulose degradation.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {23}, pmid = {39856709}, issn = {2049-2618}, support = {42177106//National Natural Science Foundation of China/ ; }, mesh = {*Germination ; *Seeds/microbiology/growth &amp; development ; *Microbiota ; Soil Microbiology ; *Astragalus Plant/microbiology/growth &amp; development ; *Cellulose/metabolism ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Fusarium ; Metagenome ; }, abstract = {BACKGROUND: Seed-associated microorganisms play crucial roles in maintaining plant health by providing nutrients and resistance to biotic and abiotic stresses. However, their functions in seed germination and disease resistance remain poorly understood. In this study, we investigated the microbial community assembly features and functional profiles of the spermosphere and endosphere microbiomes related to germinated and ungerminated seeds of Astragalus mongholicus by using amplicon and shotgun metagenome sequencing techniques. Additionally, we aimed to elucidate the relationship between beneficial microorganisms and seed germination through both in vitro and in vivo pot experiments.<br><br>RESULTS: Our findings revealed that germination significantly enhances the diversity of microbial communities associated with seeds. This increase in diversity is driven through environmental ecological niche differentiation, leading to the enrichment of potentially beneficial probiotic bacteria such as Pseudomonas and Pantoea. Conversely, Fusarium was consistently enriched in ungerminated seeds. The co-occurrence network patterns revealed that the microbial communities within germinated and ungerminated seeds presented distinct structures. Notably, germinated seeds exhibit more complex and interconnected networks, particularly for bacterial communities and their interactions with fungi. Metagenome analysis showed that germinated seed spermosphere soil had more functions related to pathogen inhibition and cellulose degradation. Through a combination of culture-dependent and germination experiments, we identified Fusarium solani as the pathogen. Consistent with the metagenome analysis, germination experiments further demonstrated that bacteria associated with pathogen inhibition and cellulose degradation could promote seed germination and vigor. Specifically, Paenibacillus sp. significantly enhanced A. mongholicus seed germination and plant growth.<br><br>CONCLUSIONS: Our study revealed the dynamics of seed-associated microorganisms during seed germination and confirmed their ecological role in promoting A. mongholicus seed germination by suppressing pathogens and degrading cellulose. This study offers a mechanistic understanding of how seed microorganisms facilitate successful seed germination, highlighting the potential for leveraging these microbial communities to increase plant health. Video Abstract.}, }
@article {pmid39856391, year = {2025}, author = {Tisza, MJ and Lloyd, RE and Hoffman, K and Smith, DP and Rewers, M and Javornik Cregeen, SJ and Petrosino, JF}, title = {Longitudinal phage-bacteria dynamics in the early life gut microbiome.}, journal = {Nature microbiology}, volume = {10}, number = {2}, pages = {420-430}, pmid = {39856391}, issn = {2058-5276}, support = {U01 DK063821/DK/NIDDK NIH HHS/United States ; UC4 DK063863/DK/NIDDK NIH HHS/United States ; UL1 TR002535/TR/NCATS NIH HHS/United States ; U01 DK063790/DK/NIDDK NIH HHS/United States ; UL1 TR000064/TR/NCATS NIH HHS/United States ; HHSN267200700014C/LM/NLM NIH HHS/United States ; U01 DK063836/DK/NIDDK NIH HHS/United States ; U01 DK063829/DK/NIDDK NIH HHS/United States ; U01 DK063865/DK/NIDDK NIH HHS/United States ; UC4 DK095300/DK/NIDDK NIH HHS/United States ; U01 DK63865//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; UC4 DK063861/DK/NIDDK NIH HHS/United States ; UC4 DK063829/DK/NIDDK NIH HHS/United States ; UC4 DK063821/DK/NIDDK NIH HHS/United States ; U01 DK63821//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; UC4 DK117483/DK/NIDDK NIH HHS/United States ; UC4 DK063836/DK/NIDDK NIH HHS/United States ; UC4 DK112243/DK/NIDDK NIH HHS/United States ; U01 DK124166/DK/NIDDK NIH HHS/United States ; U01 DK063861/DK/NIDDK NIH HHS/United States ; P30 ES030285/ES/NIEHS NIH HHS/United States ; U01 DK63829//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; U01 DK128847/DK/NIDDK NIH HHS/United States ; UC4 DK063865/DK/NIDDK NIH HHS/United States ; U01 DK063863/DK/NIDDK NIH HHS/United States ; UC4 DK106955/DK/NIDDK NIH HHS/United States ; UC4 DK100238/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Bacteriophages/genetics/classification/isolation &amp; purification ; Infant ; *Bacteria/genetics/virology/classification/isolation &amp; purification ; Child, Preschool ; Longitudinal Studies ; Metagenome ; Diabetes Mellitus, Type 1/microbiology ; Female ; Male ; Infant, Newborn ; Feces/microbiology ; Machine Learning ; }, abstract = {Microbial colonization of the human gut occurs soon after birth, proceeds through well-studied phases and is affected by lifestyle and other factors. Less is known about phage community dynamics during infant gut colonization due to small study sizes, an inability to leverage large databases and a lack of appropriate bioinformatics tools. Here we reanalysed whole microbial community shotgun sequencing data of 12,262 longitudinal samples from 887 children from four countries across four years of life as part of the The Environmental Determinants of Diabetes in the Young (TEDDY) study. We developed an extensive metagenome-assembled genome catalogue using the Marker-MAGu pipeline, which comprised 49,111 phage taxa from existing human microbiome datasets. This was used to identify phage marker genes and their integration into the MetaPhlAn 4 bacterial marker gene database enabled simultaneous assessment of phage and bacterial dynamics. We found that individual children are colonized by hundreds of different phages, which are more transitory than bacteria, accumulating a more diverse phage community over time. Type 1 diabetes correlated with a decreased rate of change in bacterial and viral communities in children aged one and two. The addition of phage data improved the ability of machine learning models to discriminate samples by country. Finally, although phage populations were specific to individuals, we observed trends of phage ecological succession that correlated well with putative host bacteria. This resource improves our understanding of phage-bacteria interactions in the developing early life microbiome.}, }
@article {pmid39856104, year = {2025}, author = {Özcan, E and Yu, KB and Dinh, L and Lum, GR and Lau, K and Hsu, J and Arino, M and Paramo, J and Lopez-Romero, A and Hsiao, EY}, title = {Dietary fiber content in clinical ketogenic diets modifies the gut microbiome and seizure resistance in mice.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {987}, pmid = {39856104}, issn = {2041-1723}, support = {R01 NS115537/NS/NINDS NIH HHS/United States ; R01NS115537//U.S. Department of Health &amp; Human Services | NIH | National Institute of Neurological Disorders and Stroke (NINDS)/ ; }, mesh = {Animals ; *Dietary Fiber/administration &amp; dosage/pharmacology ; *Diet, Ketogenic/methods ; *Gastrointestinal Microbiome/genetics/drug effects ; *Seizures/diet therapy/microbiology/prevention &amp; control ; Mice ; Humans ; Male ; Mice, Inbred C57BL ; Disease Models, Animal ; }, abstract = {The gut microbiome modulates the anti-seizure effects of the ketogenic diet, but how specific dietary formulations differentially modify the gut microbiome in ways that impact seizure outcome is poorly understood. We find that medical ketogenic infant formulas vary in macronutrient ratio, fat source, and fiber content and differentially promote resistance to 6-Hz seizures in mice. Dietary fiber, rather than fat ratio or source, drives substantial metagenomic shifts in a model human infant microbial community. Addition of fiber to a fiber-deficient ketogenic formula restores seizure resistance, and supplementing protective formulas with excess fiber potentiates seizure resistance. By screening 13 fiber sources and types, we identify metagenomic responses in the model community that correspond with increased seizure resistance. Supplementing with seizure-protective fibers enriches microbial genes related to queuosine biosynthesis and preQ0 biosynthesis and decreases genes related to sucrose degradation and TCA cycle, which are also seen in seizure-protected mice that are fed fiber-containing ketogenic formulas. This study reveals that different formulations of ketogenic diets, and dietary fiber content in particular, differentially impact seizure outcome in mice, likely by modifying the gut microbiome. Understanding interactions between diet, microbiome, and host susceptibility to seizures could inform novel microbiome-guided approaches to treat refractory epilepsy.}, }
@article {pmid39856097, year = {2025}, author = {Pidgeon, R and Mitchell, S and Shamash, M and Suleiman, L and Dridi, L and Maurice, CF and Castagner, B}, title = {Diet-derived urolithin A is produced by a dehydroxylase encoded by human gut Enterocloster species.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {999}, pmid = {39856097}, issn = {2041-1723}, support = {PJT-437944//Gouvernement du Canada | Canadian Institutes of Health Research (Instituts de Recherche en Sant&#xe9; du Canada)/ ; }, mesh = {Humans ; *Coumarins/metabolism ; *Gastrointestinal Microbiome/genetics/physiology ; Operon/genetics ; Feces/microbiology ; *Diet ; Metagenomics ; *Bacterial Proteins/metabolism/genetics ; Hydrolyzable Tannins/metabolism ; }, abstract = {Urolithin A (uroA) is a polyphenol derived from the multi-step metabolism of dietary ellagitannins by the human gut microbiota. Once absorbed, uroA can trigger mitophagy and aryl hydrocarbon receptor signaling pathways, altering host immune function, mitochondrial health, and intestinal barrier integrity. Most individuals harbor a microbiota capable of uroA production; however, the mechanisms underlying the dehydroxylation of its catechol-containing precursor (uroC) are unknown. Here, we use a combination of untargeted bacterial transcriptomics, proteomics, and comparative genomics to uncover an inducible uroC dehydroxylase (ucd) operon in Enterocloster species. We show that the ucd operon encodes a predicted molybdopterin-dependent enzyme complex that dehydroxylates urolithins at a specific position (9-OH). By interrogating publicly available metagenomics datasets, we observed that uroC-metabolizing Enterocloster species and ucd operon genes are prevalent in human feces. In ex vivo experiments with human fecal samples, only samples actively transcribing ucd could produce uroA, possibly explaining differences in urolithin metabolism between individuals. Collectively, this work identifies Enterocloster species and the ucd operon as important contributors to uroA production and establishes a multi-omics framework to further our mechanistic understanding of polyphenol metabolism by the human gut microbiota.}, }
@article {pmid39856057, year = {2025}, author = {Hu, H and Huang, Y and Yang, F and Ma, L and Zhang, J and Deng, X and Ma, N and Wang, K and Tao, Y and Lin, Q and Li, Y and Bai, X and Pan, H}, title = {Metagenome-assembled microbial genomes (n = 3,448) of the oral microbiomes of Tibetan and Duroc pigs.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {141}, pmid = {39856057}, issn = {2052-4463}, mesh = {Animals ; Swine/microbiology ; *Metagenome ; *Mouth/microbiology ; *Microbiota ; Tibet ; Metagenomics ; *Genome, Microbial ; }, abstract = {Compared with leaner breeds, local Chinese pig breeds have distinct intestinal microbial, as determined by metagenomic techniques, and the interactions between oral microorganisms and their hosts are also gradually being clarified. However, the high host genome content means that few metagenome-based oral microbiomes have been reported. Here, we combined dilution-based metagenomic sequencing and binning approaches to extract the microbial genomes from the oral microbiomes of Tibetan and Duroc pigs. The host contamination rates were reduced to 13.64%, a quarter of the normal metagenomic level (65.25% on average). Medium-high-quality metagenome-assembled genomes (MAGs; n = 3,448) spanning nine phyla were retrieved and 70.79% were novel species. Of the nonredundant MAGs, only 13.37% were shared, revealing the strong disparities between Tibetan and Duroc pigs. The oral microbial diversity of the Duroc pig was greater than that of the Tibetan pig. We present the first large-scale dilute-based metagenomic data on the pig oral microbiome, which should facilitate further investigation of the functions of oral microorganisms in pigs.}, }
@article {pmid39855018, year = {2025}, author = {Yu, Y and Huang, W and Tang, S and Xiang, Y and Yuan, L and Zhu, X and Yin, H and Dang, Z and Niu, J}, title = {Metagenomic and enzymatic mechanisms underpinning efficient water treatment of 2-ethylhexyl diphenyl phosphate (EHDPP) by the microbial consortium 8-ZY.}, journal = {Water research}, volume = {275}, number = {}, pages = {123178}, doi = {10.1016/j.watres.2025.123178}, pmid = {39855018}, issn = {1879-2448}, mesh = {*Microbial Consortia ; *Water Purification ; Biodegradation, Environmental ; *Organophosphates/metabolism ; Metagenomics ; }, abstract = {The ubiquitous presence, potential toxicity, and persistence of 2-ethylhexyl diphenyl phosphate (EHDPP) in the environment have raised significant concerns. In this study, we successfully isolate a novel microbial consortium, named 8-ZY, and we demonstrate its remarkable ability to degrade EHDPP using an extremely low concentration of the inoculate. A total of 11 degradation metabolites were identified, including hydrolysis, hydroxylated, methylated, glucuronide-conjugated, and previously unreported byproducts, enabling us to propose new transformation pathways. Further, we unveiled the active members of the microbial consortium 8-ZY during the degradation of EHDPP. We observed the presence of diverse active populations, which included Bradyrhizobium, Rhodopseudomonas, Sphingomonas, Hyphomicrobium, Chitinophaga, Aminobacter, and Ralstonia. A metagenomic analysis revealed the presence of genes that encode phosphatase, phosphodiesterase, cytochrome P450, and hydroxylase enzymes, thus indicating their crucial role in EHDPP degradation. Furthermore, we successfully isolated Burkholderia cepacia ZY1, Sphingopyxis terrae ZY2, and Amycolatopsis ZY3 from the 8-ZY consortium, confirming their significance in EHDPP degradation and metabolite formation. These findings underscored the diversity of strains and functional genes responsible for the transformation of EHDPP within the consortium 8-ZY, highlighting the essential role of synergistic interactions during EHDPP biodegradation processes. Molecular docking and dynamics simulation suggested that alkaline phosphatase, cytochrome P450, and hydroxylase stably bonded to EHDPP within their respective active pockets, targeting distinct sites on the EHDPP molecule. These findings provide a comprehensive understanding of the transformation mechanisms of OPEs and contribute valuable insights into their fate in the environment.}, }
@article {pmid39854991, year = {2025}, author = {Pei, Y and Lei, A and Wang, M and Sun, M and Yang, S and Liu, X and Liu, L and Chen, H}, title = {Novel tetracycline-degrading enzymes from the gut microbiota of black soldier fly: Discovery, performance, degradation pathways, mechanisms, and application potential.}, journal = {Journal of hazardous materials}, volume = {488}, number = {}, pages = {137286}, doi = {10.1016/j.jhazmat.2025.137286}, pmid = {39854991}, issn = {1873-3336}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Tetracycline/metabolism ; Biodegradation, Environmental ; *Anti-Bacterial Agents/metabolism ; Larva/microbiology ; *Water Pollutants, Chemical/metabolism ; *Calliphoridae/microbiology ; }, abstract = {The antibiotic tetracycline (TC) is an emerging pollutant frequently detected in various environments. Although enzymatic remediation is a promising strategy for mitigating TC contamination, the availability of effective TC-degrading enzymes remains limited, and their mechanisms and applications are not fully understood. This study developed a comprehensive TC-degrading enzyme library from the gut microbiome of the highly TC-resistant saprophagous insect, black soldier fly larvae (BSFL), using an integrated metagenomic and comparative metatranscriptomic approach, identifying 105 potential novel TC-degradation genes. Bioinformatics analysis of 10 selected genes underscored the novelty of the identified enzymes. Among these, Trg2 demonstrated strong binding affinity and significant degradation capacity for TC. Key functional amino acid residues, including Thr231, Ala64, Ala82, Gly68, Gly79, and Ser81, were identified as essential for the interaction between TC and Trg2. Six TC degradation pathways were proposed, involving the transformation of TC into 19 metabolites through de-grouping, ring opening, oxidation, reduction, and addition reactions, effectively reducing TC toxicity. Furthermore, Trg2 exhibited resilience under harsh conditions, maintaining the capacity to remove about 45 % of the total TC in mariculture wastewater across eight successive batches. This study advances the understanding of TC degradation mechanisms and highlights the potential application of novel enzymes for bioremediation purposes.}, }
@article {pmid39853798, year = {2025}, author = {Lutz, KC and Neugent, ML and Bedi, T and De Nisco, NJ and Li, Q}, title = {A Generalized Bayesian Stochastic Block Model for Microbiome Community Detection.}, journal = {Statistics in medicine}, volume = {44}, number = {3-4}, pages = {e10291}, pmid = {39853798}, issn = {1097-0258}, support = {1R01DK131267-01/NH/NIH HHS/United States ; AT-2030-20200401//Welch Foundation/ ; 1F32DK128975-01A1/NH/NIH HHS/United States ; 2210912//National Science Foundation/ ; R01 GM141519/GM/NIGMS NIH HHS/United States ; 1R01GM141519/NH/NIH HHS/United States ; 2113674//National Science Foundation/ ; R01 DK131267/DK/NIDDK NIH HHS/United States ; F32 DK128975/DK/NIDDK NIH HHS/United States ; }, mesh = {Bayes Theorem ; Humans ; *Microbiota ; Markov Chains ; Stochastic Processes ; Female ; Monte Carlo Method ; Computer Simulation ; *Models, Statistical ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing ; Postmenopause ; }, abstract = {Advances in next-generation sequencing technology have enabled the high-throughput profiling of metagenomes and accelerated microbiome studies. Recently, there has been a rise in quantitative studies that aim to decipher the microbiome co-occurrence network and its underlying community structure based on metagenomic sequence data. Uncovering the complex microbiome community structure is essential to understanding the role of the microbiome in disease progression and susceptibility. Taxonomic abundance data generated from metagenomic sequencing technologies are high-dimensional and compositional, suffering from uneven sampling depth, over-dispersion, and zero-inflation. These characteristics often challenge the reliability of the current methods for microbiome community detection. To study the microbiome co-occurrence network and perform community detection, we propose a generalized Bayesian stochastic block model that is tailored for microbiome data analysis where the data are transformed using the recently developed modified centered-log ratio transformation. Our model also allows us to leverage taxonomic tree information using a Markov random field prior. The model parameters are jointly inferred by using Markov chain Monte Carlo sampling techniques. Our simulation study showed that the proposed approach performs better than competing methods even when taxonomic tree information is non-informative. We applied our approach to a real urinary microbiome dataset from postmenopausal women. To the best of our knowledge, this is the first time the urinary microbiome co-occurrence network structure in postmenopausal women has been studied. In summary, this statistical methodology provides a new tool for facilitating advanced microbiome studies.}, }
@article {pmid39853685, year = {2025}, author = {Sun, Y and Gan, Z and Liu, S and Zhang, S and Zhong, W and Liu, J and Huang, X and He, W and Zhong, H and Cao, Q}, title = {Metagenomic and Transcriptomic Analysis Reveals Crosstalk Between Intratumor Mycobiome and Hosts in Early-Stage Nonsmoking Lung Adenocarcinoma Patients.}, journal = {Thoracic cancer}, volume = {16}, number = {2}, pages = {e15527}, pmid = {39853685}, issn = {1759-7714}, support = {220904094208//Fifth Affiliated Hospital of Sun Yat-sen University Qingdong Cao's talent-attracting fund/ ; 3320104100430//Exploration and Practice of a Tri-Party Personalized Oncology Strategy Based on Precision Medicine in Patient-Doctor-Research Collaboration/ ; }, mesh = {Humans ; *Mycobiome ; *Adenocarcinoma of Lung/genetics/pathology/microbiology ; Female ; Male ; *Lung Neoplasms/genetics/pathology/microbiology ; *Metagenomics/methods ; Middle Aged ; *Gene Expression Profiling/methods ; Aged ; Prognosis ; *Transcriptome ; Tumor Microenvironment ; }, abstract = {BACKGROUND: The mycobiome in the tumor microenvironment of non-smokers with early-stage lung adenocarcinoma (ES-LUAD) has been minimally investigated.<br><br>METHODS: In this study, we conducted ultra-deep metagenomic and transcriptomic sequencing on 128 samples collected from 46 nonsmoking ES-LUAD patients and 41 healthy controls (HC), aiming to characterize the tumor-resident mycobiome and its interactions with the host.<br><br>RESULTS: The results revealed that ES-LUAD patients exhibited fungal dysbiosis characterized by reduced species diversity and significant imbalances in specific fungal abundances. Concurrently, microbial functional analysis revealed significant alterations associated with genes such as ribosomal proteins and histones. We observed correlations between Yarrowia lipolytica, Saccharomyces paradoxus, and tumor-infiltrating immune cells (TIICs), and identified a strong association (|rho|&#x2009;>&#x2009;0.7) between S. paradoxus and 14 transcription factors. A signature of three prognostic genes (GRIA1, CDO1, FHL1) closely associated with S. paradoxus was identified and they suggest that the interaction between the mycobiome and the host may contribute to prolonged overall survival (OS). Finally, a predictive model based on six fungi demonstrated decent classification performance in distinguishing ES-LUAD cases from HCs (AUC&#x2009;=&#x2009;0.724).<br><br>CONCLUSIONS: Our study demonstrates that the interactions between the mycobiome and transcriptome within tumors may help elucidate the pathogenic mechanisms of ES-LUAD. Fungi, as a potential predictive tool, can be used as an additional resource for accurately detecting and discriminating individuals with ES-LUAD.}, }
@article {pmid39853270, year = {2025}, author = {Cardones, AR and Emiola, A and Hall, RP and Sung, AD and Zhang, J and Petty, AJ and Puza, C and Bohannon, LM and Bush, AT and Lew, MV and Fleming, E and Jin, YJ and Nichols, KR and Jain, V and Gregory, SG and Sullivan, KM and Chao, NJ and Oh, J}, title = {Cutaneous dysbiosis characterizes the post-allogeneic hematopoietic stem cell transplantation period.}, journal = {Blood advances}, volume = {9}, number = {9}, pages = {2173-2182}, doi = {10.1182/bloodadvances.2021004792}, pmid = {39853270}, issn = {2473-9537}, mesh = {Humans ; *Hematopoietic Stem Cell Transplantation/adverse effects ; *Dysbiosis/etiology ; Male ; Female ; Middle Aged ; Adult ; *Skin/microbiology/pathology ; Transplantation, Homologous/adverse effects ; Microbiota ; Graft vs Host Disease/etiology ; Aged ; }, abstract = {Gut dysbiosis is linked to mortality and the development of graft-versus-host disease after hematopoietic stem cell transplantation (HSCT), but the impact of cutaneous dysbiosis remains unexplored. We performed a pilot observational study, obtained retroauricular and forearm skin swabs from 12 adult patients before conditioning chemotherapy/radiation and at 1 week, 1 month, and 3 months after allogeneic HSCT, and performed shotgun metagenomic sequencing. The cutaneous microbiome among HSCT patients was enriched for gram-negative bacteria such as Escherichia coli and Pseudomonas, fungi, and viruses. Enrichment with bacteriophages and Polyomavirus species was observed among patients who died within 1 year. We observed longitudinal stability of the cutaneous microbiome at the 3-month time point among those who survived beyond 1 year after HSCT, although these may simply be a reflection of the overall medical status of the patients. There was no association with fungal abundance and any of the outcomes observed. The cutaneous microbiome may be a reservoir of pathobionts among allogeneic HSCT patients. Our findings suggest that cutaneous dysbiosis exists after HSCT, but the ultimate implication of this to patient outcomes remains to be seen through larger studies.}, }
@article {pmid39850835, year = {2025}, author = {Zhang, Q and Zhen, M and Wang, X and Zhao, F and Dong, Y and Wang, X and Gao, S and Wang, J and Shi, W and Zhang, Y}, title = {Antibiotic exposure enriches streptococci carrying resistance genes in periodontitis plaque biofilms.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e18835}, pmid = {39850835}, issn = {2167-8359}, mesh = {Humans ; *Biofilms/drug effects ; *Anti-Bacterial Agents/pharmacology/therapeutic use ; *Periodontitis/microbiology/drug therapy ; *Dental Plaque/microbiology ; Male ; Female ; *Streptococcus/genetics/drug effects/isolation &amp; purification ; Adult ; *Drug Resistance, Bacterial/genetics ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Microbiota/drug effects/genetics ; Tetracycline/pharmacology ; Amoxicillin/pharmacology ; Clindamycin/pharmacology ; }, abstract = {BACKGROUND: Periodontitis is not always satisfactorily treated with conventional scaling and root planing, and adjunctive use of antibiotics is required in clinical practice. Therefore, it is important for clinicians to understand the diversity and the antibiotic resistance of subgingival microbiota when exposed to different antibiotics.<br><br>MATERIALS AND METHODS: In this study, subgingival plaques were collected from 10 periodontitis patients and 11 periodontally healthy volunteers, and their microbiota response to selective pressure of four antibiotics (amoxicillin, metronidazole, clindamycin, and tetracycline) were evaluated through 16S rRNA gene amplicon and metagenomic sequencing analysis. Additionally, sensitive and resistant strains were isolated and cultured in vitro for resistance evaluation.<br><br>RESULTS: Cultivation of subgingival microbiota revealed the oral microbiota from periodontitis patients were more resistant to antibiotics than that of healthy. Significant differences were also observed for the microbial community between with and without antibiotics (especially amoxicillin and tetracycline) treated in periodontitis group.<br><br>CONCLUSION: Overall, after the two antibiotics (amoxicillin and tetracycline) exposed, the oral subgingival microbiota in periodontitis patients exhibited different diversity and composition. Streptococcus may account for oral biofilm-specific antibiotic resistance in periodontitis. This provides information for personalized treatment of periodontitis.}, }
@article {pmid39849759, year = {2025}, author = {Peng, Q and Huang, J and Li, S and Chen, Z and Zhu, Q and Yuan, H and Li, J and Massou, BB and Xie, G}, title = {Dynamics of microbial communities and metabolites during the fermentation of Ningxia goji berry wine: An integrated metagenomics and metabolomics approach.}, journal = {Food research international (Ottawa, Ont.)}, volume = {201}, number = {}, pages = {115609}, doi = {10.1016/j.foodres.2024.115609}, pmid = {39849759}, issn = {1873-7145}, mesh = {*Fermentation ; *Wine/microbiology/analysis ; *Metabolomics/methods ; *Metagenomics/methods ; *Microbiota ; Volatile Organic Compounds/analysis ; *Fruit/microbiology ; Taste ; *Bacteria/metabolism/genetics/classification ; Food Microbiology ; }, abstract = {Ningxia Goji Berry Wine (NGBW), a traditional Chinese fermented beverage, exhibits complex flavor quality changes during fermentation, the mechanisms of which remain insufficiently elucidated. This study aimed to elucidate the dynamic shifts in physicochemical properties, metabolites, and microbial communities throughout the controlled fermentation process of NGBW. Metabolomic analysis identified 8 key differential volatile metabolites (VOCs) and 406 differential non-volatile metabolites. The enrichment analysis of KEGG metabolic pathways revealed that, during the fermentation of NGBW, ten critical metabolic pathways-Purine metabolism, Glycine, Serine, and Threonine metabolism, Galactose metabolism, and the Citric Acid (TCA) Cycle-play essential roles. Amplicon sequencing indicated that 25 bacterial genera dominated the microbial ecosystem (relative abundance ≥ 0.1 %). Spearman correlation analysis revealed significant associations between 5 core microorganism and flavor compounds, and 25 core microbes with non-volatile metabolites, suggesting their pivotal roles in flavor formation. This study provides a theoretical basis for optimizing the fermentation process and enhancing the flavor quality of NGBW.}, }
@article {pmid39849445, year = {2025}, author = {Xie, H and Chen, Z and Wu, G and Wei, P and Gong, T and Chen, S and Xu, Z}, title = {Application of metagenomic next-generation sequencing (mNGS) to describe the microbial characteristics of diabetic foot ulcers at a tertiary medical center in South China.}, journal = {BMC endocrine disorders}, volume = {25}, number = {1}, pages = {18}, pmid = {39849445}, issn = {1472-6823}, support = {[2021]76//the High-level Hospital and Clinical Specialty Discipline Construction Programme for Fujian Medical Development, China/ ; 2023J01692//Fujian Provincial Natural Science Foundation of China/ ; 2022J01243//Fujian Provincial Natural Science Foundation of China/ ; 2020Y9094//the Joint Funds for the innovation of science and Technology&#xff0c;Fujian province, China/ ; 2023Y9213//the Joint Funds for the innovation of science and Technology&#xff0c;Fujian province, China/ ; 2021Y9068//the Joint Funds for the innovation of science and Technology&#xff0c;Fujian province, China/ ; 82002034//National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Diabetic Foot/microbiology/diagnosis ; *High-Throughput Nucleotide Sequencing/methods ; China/epidemiology ; *Metagenomics/methods ; Male ; Female ; Middle Aged ; Tertiary Care Centers ; Aged ; *Microbiota ; Adult ; *Bacteria/genetics/isolation &amp; purification ; Follow-Up Studies ; }, abstract = {BACKGROUND: Diabetic foot ulcers (DFUs) are characterized by dynamic wound microbiome, the timely and accurate identification of pathogens in the clinic is required to initiate precise and individualized treatment. Metagenomic next-generation sequencing (mNGS) has been a useful supplement to routine culture method for the etiological diagnosis of DFUs. In this study, we utilized a routine culture method and mNGS to analyze the same DFU wound samples and the results were compared.<br><br>METHODS: Forty samples from patients with DFUs at a tertiary medical center in South China were collected, the microorganisms were identified with mNGS and routine culture method simultaneously.<br><br>RESULTS: The results showed that the positive detection rate of microorganisms in DFUs with mNGS was much higher (95% vs. 60%). Thirteen strains of microorganisms were detected with routine culture method, and seventy-seven strains were detected with mNGS. Staphylococcus aureus was the most common microorganism detected with culture method, while Enterococcus faecalis was the most common microorganism detected with mNGS. The false negative rate of the culture method was 35%, that was, 14 samples with negative results with culture method were found to be positive with mNGS.<br><br>CONCLUSION: The mNGS method had a higher positive detection rate and identified a broader spectrum of microorganisms in DFUs, thus, mNGS provided a more comprehensive understanding of the microbiome of DFUs to facilitate the development of timely and optimal treatment.<br><br>TRIAL REGISTRATION: The study was conducted in accordance with the Declaration of Helsinki and approved by the Ethical Review Committee of the Fujian Medical University Union Hospital (approval number 2021KY054).}, }
@article {pmid39849165, year = {2025}, author = {Sandhu, S and Kumar, S and Singh, P and Singh, BP and Jurel, SK and Lal, N and Mohit,  and Sharma, V and Rai, N and Chand, P}, title = {Metagenomic profiling of plaque microbiota in Indian subjects: identified hidden ecological tapestry.}, journal = {Current genetics}, volume = {71}, number = {1}, pages = {3}, pmid = {39849165}, issn = {1432-0983}, mesh = {Humans ; *Dental Plaque/microbiology ; Female ; Male ; India/epidemiology ; *Metagenomics/methods ; *Microbiota/genetics ; Adult ; Middle Aged ; Adolescent ; RNA, Ribosomal, 16S/genetics ; *Metagenome ; Young Adult ; Streptococcus/genetics ; Aged ; Bacteria/genetics/classification ; Dental Caries/microbiology ; Child ; }, abstract = {Dental plaque biofilms are the primary etiologic factor for various chronic oral infectious diseases. In recent years, dental plaque shows enormous potential to know about an individual microbiota. Various microbiome studies of oral cavity from different geographical locations reveals abundance of microbial species. Although, the representation of Indian population in this respect is limited, which make us curious to undergo this study. This study investigates the dental plaque microbiota of North Indian individuals based on their age, gender, and dietary patterns; specifically, food preference and availability of water source using 16 S rRNA metagenomics analysis. The findings from this study revealed that Streptococcus levels are high across genders, age groups, and water source, highlighting its role as a predominant dental caries associated species like Streptococcus mutans, Streptococcus pyogenes, Streptococcus sobrinus and Streptococcus oralis in the studied population groups. Additionally, the abundance of Actinomyces is observed higher in young individuals and females whereas Fusobacterium and Leptotrichia were high in elderly individuals. Moreover, non-vegetarians have higher abundance of Streptococcus and Fusobacterium, whereas vegetarians show higher abundance of Prevotella and Leptotrichia. The study also highlights the influence of water type on bacterial composition of dental plaque in the studied population i.e., individuals consuming underground water has high abundance of Streptococcus, whereas individuals consuming RO water exhibit elevated Prevotella and Leptotrichia. Insights emerged from the analysis illuminates the complex dynamics of microbiota in dental plaque among North Indians. This study also highlight that this variation of microbiome is influenced by age, gender, and dietary habits (vegetarian or non-vegetarian lifestyle). These results will fill a significant knowledge gap regarding the Indian dental plaque microbiome but also offer a foundation to conduct metagenome studies and potential therapeutic implications for future personalized oral health interventions.}, }
@article {pmid39848515, year = {2025}, author = {Zhang, M and Bai, L and Yao, Z and Li, W and Yang, W}, title = {Seasonal lake ice cover drives the restructuring of bacteria-archaea and bacteria-fungi interdomain ecological networks across diverse habitats.}, journal = {Environmental research}, volume = {269}, number = {}, pages = {120907}, doi = {10.1016/j.envres.2025.120907}, pmid = {39848515}, issn = {1096-0953}, mesh = {*Lakes/microbiology ; *Archaea ; *Fungi ; *Ice Cover/microbiology ; Seasons ; *Bacteria/classification ; *Ecosystem ; *Microbiota ; China ; Geologic Sediments/microbiology ; }, abstract = {The coexistence of different microbial communities is fundamental to the sustainability of many ecosystems, yet our understanding of the relationships among microbial communities in plateau cold-region lakes affected by seasonal ice cover remains limited. This research involved investigating three lakes in the Inner Mongolia segment of the Yellow River basin during frozen and unfrozen periods in two habitats: water bodies and sediments. The research examined the composition and function of bacteria, archaea, and fungi across different times and habitats within the basin, their response to environmental variables in water and sediment, and inter-domain interactions between bacteria-archaea and bacteria-fungi were compared using interdomain ecological network (IDEN). The findings indicate significant variations in the structures of bacterial, archaeal, and fungal communities across different periods and habitats, with the pH of the water body being a crucial environmental variable affecting microbial community composition. In the frozen period, the functionality of microbial communities, especially in terms of energy metabolism, was significantly impacted, with water bodies experiencing more pronounced effects than sediments. Archaea and fungi significantly contribute to the stability of bacterial communities across various habitats, especially in ice-covered conditions, where stronger associations between bacterial communities, archaea, and fungi promote the microbial communities' adaptability to cold stress. Furthermore, our results indicate that the primary environmental variable influencing the structure of IDENs is the nutrient salt content in both water bodies and sediments. This study broadens our understanding of the responses and feedback mechanisms of inter-domain microbial interactions in lakes influenced by seasonal ice cover.}, }
@article {pmid39847933, year = {2025}, author = {Malla, MA and Nomalihle, M and Featherston, J and Kumar, A and Amoah, ID and Ismail, A and Bux, F and Kumari, S}, title = {Comprehensive profiling and risk assessment of antibiotic resistomes in surface water and plastisphere by integrated shotgun metagenomics.}, journal = {Journal of hazardous materials}, volume = {487}, number = {}, pages = {137180}, doi = {10.1016/j.jhazmat.2025.137180}, pmid = {39847933}, issn = {1873-3336}, mesh = {Metagenomics ; Risk Assessment ; *Microbiota/drug effects ; *Water Pollutants, Chemical/analysis ; *Anti-Bacterial Agents/pharmacology ; *Water Microbiology ; Bacteria/genetics/drug effects ; *Microplastics/analysis ; Environmental Monitoring ; Genes, Bacterial ; *Drug Resistance, Microbial/genetics ; }, abstract = {The ever-increasing microplastics (MPs) and antibiotic-resistance genes (ARGs) in aquatic ecosystems has become a serious global challenging issue. However, the impact of different pollution sources on microbiome and antibiotic resistome in surface water (SW) and plastisphere (PS) remains largely elusive. Here, shotgun metagenomics was used to analyze microbiome structure and antibiotic resistome in SW and PS under the influence of different pollution sources. Pseudomonas were the most abundant genus, followed by Flavobacterium, Acinetobacter, Acidovorax, and Limnohabitans. However, their relative abundance varied significantly both across the sampling sites and habitats i.e. SW and PS (p < 0.05). Additionally, various ARGs were detected in SW and PS, with PS (372) having significantly more potential ARGs than SW (293). The results further showed significant variations in the relative abundance of potential pathogenic bacteria across the sampling sites and habitats (p < 0.05). Further moreover, significant differences were observed in antibiotic resistome risk scores, ARGs and MGEs across different habitats. Over all, this study suggests that pollution source and water quality parameters had a significant impact on microbiome composition and antibiotic resistome in SW and PS.}, }
@article {pmid39846163, year = {2025}, author = {Jena, PK and Arditi, M and Noval Rivas, M}, title = {Gut Microbiota Alterations in Patients With Kawasaki Disease.}, journal = {Arteriosclerosis, thrombosis, and vascular biology}, volume = {45}, number = {3}, pages = {345-358}, pmid = {39846163}, issn = {1524-4636}, support = {R01 HL139766/HL/NHLBI NIH HHS/United States ; R01 HL159297/HL/NHLBI NIH HHS/United States ; R01 HL149972/HL/NHLBI NIH HHS/United States ; R01 AI157274/AI/NIAID NIH HHS/United States ; R01 HL170580/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; *Mucocutaneous Lymph Node Syndrome/microbiology/therapy/immunology ; *Gastrointestinal Microbiome ; Animals ; Dysbiosis ; *Bacteria/metabolism/pathogenicity ; *Intestines/microbiology ; }, abstract = {The intestinal microbiota influences many host biological processes, including metabolism, intestinal barrier functions, and immune responses in the gut and distant organs. Alterations in its composition have been associated with the development of inflammatory disorders and cardiovascular diseases, including Kawasaki disease (KD). KD is an acute pediatric vasculitis of unknown etiology and the leading cause of acquired heart disease in children in the United States. The presence of gastrointestinal symptoms in the acute phase of KD has been associated with an increased risk of treatment resistance and the development of coronary artery aneurysms. Studies report alterations in fecal bacterial communities of patients with KD, characterized by the blooming of pathogenic bacteria and decreased relative abundance of short-chain fatty acid-producing bacteria. However, causality and functionality cannot be established from these observational patient cohorts of KD. This highlights the need for more advanced and rigorous studies to establish causality and functionality in both experimental models of KD vasculitis and patient cohorts. Here, we review the evidence linking an altered gut microbiota composition to the development of KD, assess the potential mechanisms involved in this process, and discuss the potential therapeutic value of these observations.}, }
@article {pmid39844349, year = {2025}, author = {Fonseca de Souza, L and Oliveira, HG and Pellegrinetti, TA and Mendes, LW and Bonatelli, ML and Dumaresq, ASR and Sinatti, VVC and Pinheiro, JB and Azevedo, JL and Quecine, MC}, title = {Co-inoculation with Bacillus thuringiensis RZ2MS9 and rhizobia improves the soybean development and modulates soil functional diversity.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {2}, pages = {}, pmid = {39844349}, issn = {1574-6941}, support = {2021/12378-4//FAPESP/ ; 166644/2020-0//National Council for Scientific and Technological Development/ ; 69242/2018-8//H.G.O./ ; 22.1.08498.01.0//T.A.P./ ; }, mesh = {*Glycine max/growth &amp; development/microbiology ; *Soil Microbiology ; *Bacillus thuringiensis/physiology ; Soil/chemistry ; *Rhizobium/physiology ; Biodiversity ; }, abstract = {Despite the beneficial effects of plant growth-promoting rhizobacteria on agriculture, understanding the consequences of introducing foreign microbes into soil taxonomic and functional diversity is necessary. This study evaluated the effects co-inoculation of soybean with Bacillus thuringiensis (Bt) RZ2MS9 and commercial rhizobia on the natural microbial community structure and functional potential. Our results indicated that soybean development was positively influenced by co-inoculation, plants exhibited greater height and a higher number of pods, and no reductions in productivity estimates. Soil prokaryotic diversity and community structure remained unchanged by Bt RZMS9 inoculation or co-inoculation with rhizobia 147 days after sowing. However, functional diversity was influenced by sole Bt inoculation, potentially due to community quorum sensing disruption by N-acyl homoserine lactone hydrolases. The genes enriched by co-inoculation were mostly related to soil phosphorus cycling, with gcd showing the most pronounced increase. The nifA genes increased when rhizobia alone were inoculated, suggesting that this pathway could be affected by Bt RZ2MS9 inoculation. This study demonstrates the synergistic activity of rhizobia and Bt RZ2MS9 on soybean development, without significantly interfering with natural microbial community, presenting a promising approach for sustainable crop management.}, }
@article {pmid39844180, year = {2025}, author = {Chen, J and Pan, Q and Lu, L and Huang, X and Wang, S and Liu, X and Lun, J and Xu, X and Su, H and Guo, F and Yang, L and You, L and Xiao, H and Luo, W and Liu, HF and Pan, Q}, title = {Atg5 deficiency in basophils improves metabolism in lupus mice by regulating gut microbiota dysbiosis.}, journal = {Cell communication and signaling : CCS}, volume = {23}, number = {1}, pages = {40}, pmid = {39844180}, issn = {1478-811X}, support = {No. 82070757, 82270770//National Natural Science Foundation of China/ ; 2022B1212030003//Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Noncommunicable Diseases/ ; 2021A05067//Science and Technology Planning Project of Zhanjiang City/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Autophagy-Related Protein 5/deficiency/metabolism/genetics ; *Lupus Erythematosus, Systemic/metabolism/microbiology/pathology ; *Dysbiosis/metabolism ; Mice ; *Basophils/metabolism/transplantation ; Mice, Knockout ; Female ; Mice, Inbred MRL lpr ; Autophagy ; }, abstract = {Autophagic activation in immune cells, gut microbiota dysbiosis, and metabolic abnormalities have been reported separately as characteristics of systemic lupus erythematosus (SLE). Elucidating the crosstalk among the immune system, commensal microbiota, and metabolites is crucial to understanding the pathogenesis of autoimmune diseases. Emerging evidence shows that basophil activation plays a critical role in the pathogenesis of SLE; however, the underlying mechanisms remain largely unknown. Here, we investigated the effects of autophagic inhibition on the pathogenesis of basophils in SLE using Autophagy-related gene 5 (Atg5) knockout (Atg5[-/-]) as an autophagic inhibitor. Specifically, we knocked out basophilic Atg5 in vivo to investigate its impact on lupus metabolism. Furthermore, Atg5[-/-] basophils were transferred to basophil-depleted MRL/MpJ-Fas[lpr] (MRL/lpr) mice to study their effect on disease metabolism. Metagenomic and targeted metabolomic sequencing results indicated considerable reduction in the levels of plasma autoantibodies and inflammatory cytokines in the Atg5[-/-] basophil transfer group compared with that in the control group. Transplanting Atg5[-/-] basophils improved the gut microbiota balance in MRL/lpr mice, increasing the abundance of beneficial bacteria, such as Ligilactobacillus murinus and Faecalitalea rodentium, and reducing that of potentially pathogenic bacteria such as Phocaeicola salanitronis. The transplantation of Atg5-deficient basophils improved lupus symptoms by modulating lipid and amino acid metabolism. This improvement was linked to changes in the gut microbiota, particularly an increase in Ligilactobacillus murinus and Faecalitalea rodentium populations. These microbial shifts are believed to promote the production of beneficial metabolites, such as γ-linolenic acid and oleoyl-1-palmitoyl-sn-glycero-3-phosphocholine, while reducing the levels of harmful metabolites such as arginine. These alterations in the metabolic profile contribute to the alleviation of lupus symptoms. Collectively, these findings reveal a novel role of basophil autophagy in SLE, highlighting its potential as a therapeutic target.}, }
@article {pmid39843539, year = {2025}, author = {Laczkó, L and Nagy, NA and Nagy, &#xc1; and Maroda, &#xc1; and Sály, P}, title = {An updated reference genome of Barbatula barbatula (Linnaeus, 1758).}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {137}, pmid = {39843539}, issn = {2052-4463}, support = {OTKA PD142602//Nemzeti Kutat&#xe1;si, Fejleszt&#xe9;si &#xe9;s Innov&#xe1;ci&#xf3;s Hivatal (NKFI Office)/ ; }, mesh = {Animals ; *Genome ; Microsatellite Repeats ; *Cypriniformes/genetics ; *Cyprinidae/genetics ; }, abstract = {The stone loach Barbatula barbatula is a benthic fish species widely distributed throughout Europe, primarily inhabiting stony upper sections of stream networks. This study presents an updated genome assembly of B. barbatula, contributing to the species' available genomic resources for downstream applications such as conservation genetics. The draft assembly was 550 Mbp in size, with an N50 of 11.21 Mbp. We used the species' available chromosome scaffolds to finish the genome. The final assembly had a BUSCO score of 96.7%. We identified 23270 protein-coding genes, and the proteome exhibited high completeness with BUSCO (93.1%) and OMArk (90.81%). Despite using multiple approaches to reduce duplicate contigs, we observed a relatively high duplicate ratio of 6.1% (BUSCO) and 8.52% (OMArk) in the annotations. We aimed to find microsatellite loci present in both the species' publicly available genome and the new assembly to aid marker development for downstream analyses. This dataset serves as a reference for genomic analysis and is useful for developing markers to study the species' biodiversity and support conservation efforts.}, }
@article {pmid39843522, year = {2025}, author = {Bray, AS and Broberg, CA and Hudson, AW and Wu, W and Nagpal, RK and Islam, M and Valencia-Bacca, JD and Shahid, F and Hernandez, GE and Nutter, NA and Walker, KA and Bennett, EF and Young, TM and Barnes, AJ and Ornelles, DA and Miller, VL and Zafar, MA}, title = {Klebsiella pneumoniae employs a type VI secretion system to overcome microbiota-mediated colonization resistance.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {940}, pmid = {39843522}, issn = {2041-1723}, support = {AI166642//U.S. Department of Health &amp; Human Services | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; R21 AI166642/AI/NIAID NIH HHS/United States ; T32 AI007151/AI/NIAID NIH HHS/United States ; T32 AI007401/AI/NIAID NIH HHS/United States ; AI178595//U.S. Department of Health &amp; Human Services | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; R01 AI173244/AI/NIAID NIH HHS/United States ; T32 GM127261/GM/NIGMS NIH HHS/United States ; R21 AI178595/AI/NIAID NIH HHS/United States ; AI173244//U.S. Department of Health &amp; Human Services | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; R21 AI132925/AI/NIAID NIH HHS/United States ; }, mesh = {*Klebsiella pneumoniae/genetics/metabolism/pathogenicity/physiology ; *Type VI Secretion Systems/metabolism/genetics ; Animals ; Mice ; *Gastrointestinal Microbiome/genetics/physiology ; *Klebsiella Infections/microbiology ; Bacterial Proteins/metabolism/genetics ; Gene Expression Regulation, Bacterial ; Gastrointestinal Tract/microbiology ; Female ; DNA Transposable Elements ; }, abstract = {Microbial species must compete for space and nutrients to persist in the gastrointestinal (GI) tract, and our understanding of the complex pathobiont-microbiota interactions is far from complete. Klebsiella pneumoniae, a problematic, often drug-resistant nosocomial pathogen, can colonize the GI tract asymptomatically, serving as an infection reservoir. To provide insight on how K. pneumoniae interacts with the resident gut microbiome, we conduct a transposon mutagenesis screen using a murine model of GI colonization with an intact microbiota. Among the genes identified were those encoding a type VI secretion system (T6SS), which mediates contact-dependent killing of gram-negative bacteria. From several approaches, we demonstrate that the T6SS is critical for K. pneumoniae gut colonization. Metagenomics and in vitro killing assays reveal that K. pneumoniae reduces Betaproteobacteria species in a T6SS-dependent manner, thus identifying specific species targeted by K. pneumoniae. We further show that T6SS gene expression is controlled by several transcriptional regulators and that expression only occurs in vitro under conditions that mimic the gut environment. By enabling K. pneumoniae to thrive in the gut, the T6SS indirectly contributes to the pathogenic potential of this organism. These observations advance our molecular understanding of how K. pneumoniae successfully colonizes the GI tract.}, }
@article {pmid39843444, year = {2025}, author = {Bechtold, EK and Ellenbogen, JB and Villa, JA and de Melo Ferreira, DK and Oliverio, AM and Kostka, JE and Rich, VI and Varner, RK and Bansal, S and Ward, EJ and Bohrer, G and Borton, MA and Wrighton, KC and Wilkins, MJ}, title = {Metabolic interactions underpinning high methane fluxes across terrestrial freshwater wetlands.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {944}, pmid = {39843444}, issn = {2041-1723}, support = {DE-SC0007144//U.S. Department of Energy (DOE)/ ; DE-SC0023084//U.S. Department of Energy (DOE)/ ; DE-SC0021067//U.S. Department of Energy (DOE)/ ; DE-SC0022191//U.S. Department of Energy (DOE)/ ; P30 CA046934/CA/NCI NIH HHS/United States ; DESC0023297//U.S. Department of Energy (DOE)/ ; EAR-2029686//National Science Foundation (NSF)/ ; DE-SC0012088//U.S. Department of Energy (DOE)/ ; DE-SC000054//U.S. Department of Energy (DOE)/ ; DE-SC0023456//U.S. Department of Energy (DOE)/ ; DEB-1754756//National Science Foundation (NSF)/ ; PRFB-2109592//National Science Foundation (NSF)/ ; DESC000054//U.S. Department of Energy (DOE)/ ; DE-SC0021350//U.S. Department of Energy (DOE)/ ; }, mesh = {*Methane/metabolism ; *Wetlands ; RNA, Ribosomal, 16S/genetics ; Microbiota/genetics ; *Fresh Water/microbiology ; Bacteria/metabolism/genetics/classification ; Metagenome ; Climate Change ; }, abstract = {Current estimates of wetland contributions to the global methane budget carry high uncertainty, particularly in accurately predicting emissions from high methane-emitting wetlands. Microorganisms drive methane cycling, but little is known about their conservation across wetlands. To address this, we integrate 16S rRNA amplicon datasets, metagenomes, metatranscriptomes, and annual methane flux data across 9 wetlands, creating the Multi-Omics for Understanding Climate Change (MUCC) v2.0.0 database. This resource is used to link microbiome composition to function and methane emissions, focusing on methane-cycling microbes and the networks driving carbon decomposition. We identify eight methane-cycling genera shared across wetlands and show wetland-specific metabolic interactions in marshes, revealing low connections between methanogens and methanotrophs in high-emitting wetlands. Methanoregula emerged as a hub methanogen across networks and is a strong predictor of methane flux. In these wetlands it also displays the functional potential for methylotrophic methanogenesis, highlighting the importance of this pathway in these ecosystems. Collectively, our findings illuminate trends between microbial decomposition networks and methane flux while providing an extensive publicly available database to advance future wetland research.}, }
@article {pmid39842302, year = {2025}, author = {Li, H and Zhang, X and Zhaxi, Y and Pan, C and Zhang, Z and Pan, J and Shahzad, K and Sun, F and Zhen, Y and Jinmei, J and Zhao, W and Song, T}, title = {Integrative multi-omics analysis reveals liver-gut axis adaptation in high-altitude goats.}, journal = {Comparative biochemistry and physiology. Part D, Genomics &amp; proteomics}, volume = {54}, number = {}, pages = {101422}, doi = {10.1016/j.cbd.2025.101422}, pmid = {39842302}, issn = {1878-0407}, mesh = {Animals ; *Goats/physiology/genetics/microbiology/metabolism ; *Altitude ; *Gastrointestinal Microbiome ; *Liver/metabolism ; Transcriptome ; *Adaptation, Physiological ; Metabolome ; Metabolomics ; Multiomics ; }, abstract = {The liver-gut axis is an important regulatory axis for the host's metabolic functions. The study of liver gene expression, changes in metabolic products and the regulation of gut microbial communities in plateau animals under harsh environments can reveal the mechanisms by which Tibetan goats adapt to the plateau environment. This study employs transcriptome, metabolome and metagenomic analyses to reveal the differences in genes, metabolism, and gut microbiota between Jianzhou big-eared goats (JBG) and Xizang cashmere goats (TCG), which is of significant importance for improving survival models of high-altitude ruminants. The results showed that there were 553 DEGs in the liver of JBG and TCG. Hepatic metabolomic analysis revealed significant differences in metabolic activity between the JBG and TCG groups, with notable increases in glycerophospholipid and retinol metabolic pathways. The gut microbiota, including Andreesenia, Dielma, Oscillibacter, Agrobacterium, Hyella and Thermosinus, interact with liver metabolites and can regulate the high-altitude adaptability of goats. This study reveals that TCG enhance immune regulation and energy utilization efficiency by regulating liver gene expression, modulating metabolic pathways, and improving gut microbiota, thereby helping TCG maintain healthy survival capabilities in hypoxic and high-radiation environments.}, }
@article {pmid39841201, year = {2025}, author = {Geng, P and Zhao, N and Zhou, Y and Harris, RS and Ge, Y}, title = {Faecalibacterium prausnitzii regulates carbohydrate metabolic functions of the gut microbiome in C57BL/6 mice.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2455503}, doi = {10.1080/19490976.2025.2455503}, pmid = {39841201}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice, Inbred C57BL ; *Carbohydrate Metabolism ; Mice ; Feces/microbiology ; *Faecalibacterium prausnitzii/genetics/isolation &amp; purification/classification/metabolism/physiology ; RNA, Ribosomal, 16S/genetics ; Phylogeny ; Male ; Probiotics/administration &amp; dosage ; }, abstract = {The probiotic impact of microbes on host metabolism and health depends on both host genetics and bacterial genomic variation. Faecalibacterium prausnitzii is the predominant human gut commensal emerging as a next-generation probiotic. Although this bacterium exhibits substantial intraspecies diversity, it is unclear whether genetically distinct F. prausnitzii strains might lead to functional differences in the gut microbiome. Here, we isolated and characterized a novel F. prausnitzii strain (UT1) that belongs to the most prevalent but underappreciated phylogenetic clade in the global human population. Genome analysis showed that this butyrate-producing isolate carries multiple putative mobile genetic elements, a clade-specific defense system, and a range of carbohydrate catabolic enzymes. Multiomic approaches were used to profile the impact of UT1 on the gut microbiome and associated metabolic activity of C57BL/6 mice at homeostasis. Both 16S rRNA and metagenomic sequencing demonstrated that oral administration of UT1 resulted in profound microbial compositional changes including a significant enrichment of Lactobacillus, Bifidobacterium, and Turicibacter. Functional profiling of the fecal metagenomes revealed a markedly higher abundance of carbohydrate-active enzymes (CAZymes) in UT1-gavaged mice. Accordingly, UT1-conditioned microbiota possessed the elevated capability of utilizing starch in vitro and exhibited a lower availability of microbiota-accessible carbohydrates in the gut. Further analysis uncovered a functional network wherein UT1 reduced the abundance of mucin-degrading CAZymes and microbes, which correlated with a concomitant reduction of fecal mucin glycans. Collectively, our results reveal a crucial role of UT1 in facilitating the carbohydrate metabolism of the gut microbiome and expand our understanding of the genetic and phenotypic diversity of F. prausnitzii.}, }
@article {pmid39840975, year = {2025}, author = {Ge, B and McDonald, RC and Yang, Q and Domesle, KJ and Sarria, S and Li, X and Hsu, C-H and Jarvis, KG and Tadesse, DA}, title = {Exploring animal food microbiomes and resistomes via 16S rRNA gene amplicon sequencing and shotgun metagenomics.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {2}, pages = {e0223024}, pmid = {39840975}, issn = {1098-5336}, mesh = {RNA, Ribosomal, 16S/genetics/analysis ; *Metagenomics ; Animals ; *Animal Feed/microbiology ; *Microbiota ; *Bacteria/genetics/drug effects/isolation &amp; purification/classification ; *Food Microbiology ; Cattle ; Dogs ; Sequence Analysis, DNA ; DNA, Bacterial/genetics ; }, abstract = {As a diverse and complex food matrix, the animal food microbiota and repertoire of antimicrobial resistance (AMR) genes remain to be better understood. In this study, 16S rRNA gene amplicon sequencing and shotgun metagenomics were applied to three types of animal food samples (cattle feed, dry dog food, and poultry feed). ZymoBIOMICS mock microbial community was used for workflow optimization including DNA extraction kits and bead-beating conditions. The four DNA extraction kits (AllPrep PowerViral DNA/RNA Kit, DNeasy Blood &amp; Tissue Kit, DNeasy PowerSoil Kit, and ZymoBIOMICS DNA Miniprep Kit) were compared in animal food as well as the use of peptide nucleic acid blockers for 16S rRNA gene amplicon sequencing. Distinct microbial community profiles were generated, which varied by animal food type and DNA extraction kit. Employing peptide nucleic acid blockers prior to 16S rRNA gene amplicon sequencing was comparable with post-sequencing in silico filtering at removing chloroplast and mitochondrial sequences. There was a good agreement between 16S rRNA gene amplicon sequencing and shotgun metagenomics on community profiles in animal feed data sets; however, they differed in taxonomic resolution, with the latter superior at resolving at the species level. Although the overall prevalence of AMR genes was low, resistome analysis of animal feed data sets by shotgun metagenomics revealed 10 AMR gene/protein families, including beta-lactamases, erythromycin/lincomycin/pristinamycin/tylosin, fosfomycin, phenicol, and quinolone. Future expansion of microbiome and resistome profiling in animal food will help better understand the bacterial and AMR gene diversity in these commodities and help guide pathogen control and AMR prevention efforts.IMPORTANCEWith the growing interest and application of metagenomics in understanding the structure/composition and function of diverse microbial communities along the One Health continuum, this study represents one of the first attempts to employ these advanced sequencing technologies to characterize the microbiota and AMR genes in animal food. We unraveled the effects of DNA extraction kits on sample analysis by 16S rRNA gene amplicon sequencing and showed similar efficacies of two strategies at removing chloroplast and mitochondrial reads. The in-depth analysis using shotgun metagenomics shed light on the community compositions and the presence of an array of AMR genes in animal food. This exploration of microbiomes and resistomes in representative animal food samples by both sequencing approaches laid important groundwork for future metagenomic investigations to gain a better understanding of the baseline/core microbiomes and associated AMR functions in these diverse commodities and help guide pathogen control and AMR prevention efforts.}, }
@article {pmid39840973, year = {2025}, author = {Wu, DG and Harris, CR and Kalis, KM and Bowen, M and Biddle, JF and Farag, IF}, title = {Comparative metagenomics of tropical reef fishes show conserved core gut functions across hosts and diets with diet-related functional gene enrichments.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {2}, pages = {e0222924}, pmid = {39840973}, issn = {1098-5336}, support = {P20 GM103446/GM/NIGMS NIH HHS/United States ; S10 OD028725/OD/NIH HHS/United States ; //Midlin Foundation/ ; //W. M. Keck Foundation (WMKF)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Metagenomics ; *Diet/veterinary ; *Fishes/microbiology/physiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Metagenome ; Coral Reefs ; Animal Feed/analysis ; }, abstract = {UNLABELLED: Fish gut microbial communities are important for the breakdown and energy harvesting of the host diet. Microbes within the fish gut are selected by environmental and evolutionary factors. To understand how fish gut microbial communities are shaped by diet, three tropical fish species (hawkfish, Paracirrhites arcatus; yellow tang, Zebrasoma flavescens; and triggerfish, Rhinecanthus aculeatus) were fed piscivorous (fish meal pellets), herbivorous (seaweed), and invertivorous (shrimp) diets, respectively. From fecal samples, a total of 43 metagenome assembled genomes (MAGs) were recovered from all fish diet treatments. Each host-diet treatment harbored distinct microbial communities based on taxonomy, with Proteobacteria, Bacteroidota, and Firmicutes being the most represented. Based on their metagenomes, MAGs from all three host-diet treatments demonstrated a baseline ability to degrade proteinaceous, fatty acid, and simple carbohydrate inputs and carry out central carbon metabolism, lactate and formate fermentation, acetogenesis, nitrate respiration, and B vitamin synthesis. The herbivorous yellow tang harbored more functionally diverse MAGs with some complex polysaccharide degradation specialists, while the piscivorous hawkfish's MAGs were more specialized for the degradation of proteins. The invertivorous triggerfish's gut MAGs lacked many carbohydrate-degrading capabilities, resulting in them being more specialized and functionally uniform. Across all treatments, several MAGs were able to participate in only individual steps of the degradation of complex polysaccharides, suggestive of microbial community networks that degrade complex inputs.<br><br>IMPORTANCE: The benefits of healthy microbiomes for vertebrate hosts include the breakdown of food into more readily usable forms and production of essential vitamins from their host's diet. Compositions of microbial communities in the guts of fish in response to diet have been studied, but there is a lack of a comprehensive understanding of the genome-based metabolic capabilities of specific microbes and how they support their hosts. Therefore, we assembled genomes of several gut microbes collected from the feces of three fish species that were being fed different diets to illustrate how individual microbes can carry out specific steps in the degradation and energy utilization of various food inputs and support their host. We found evidence that fish gut microbial communities share several core functions despite differences in microbial taxonomy. Herbivorous fish harbored a functionally diverse microbial community with plant matter degraders, while the piscivorous and invertivorous fish had microbiomes more specialized in protein degradation.}, }
@article {pmid39838455, year = {2025}, author = {Liao, H and Li, J and Wang, YZ and Li, H and An, XL and Wang, T and Chang, RY and Zhu, YG and Su, JQ}, title = {Evolutionary diversification and succession of soil huge phages in glacier foreland.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {18}, pmid = {39838455}, issn = {2049-2618}, support = {4237070301//National Natural Science Foundation of China/ ; 42161134002//National Natural Science Foundation of China/ ; STEP, 2021QZKK0103//Second Tibetan Plateau Scientific Expedition and Research Program/ ; }, mesh = {*Bacteriophages/genetics/classification/isolation &amp; purification ; *Soil Microbiology ; Phylogeny ; *Ice Cover/virology/microbiology ; Metagenomics/methods ; Tibet ; Genome, Viral ; Biodiversity ; Evolution, Molecular ; Soil ; }, abstract = {BACKGROUND: Huge phages (genome size ≥ 200 kb) have been detected in diverse habitats worldwide, infecting a variety of prokaryotes. However, their evolution and adaptation strategy in soils remain poorly understood due to the scarcity of soil-derived genomes.<br><br>RESULTS: Here, we conduct a size-fractioned (<&#x2009;0.22 &#x3bc;m) metagenomic analysis across a 130-year chronosequence of a glacier foreland in the Tibetan Plateau and discovered 412 novel viral operational taxonomic units (vOTUs) of huge phages. The phylogenomic and gene-shared network analysis gained insights into their unique evolutionary history compared with smaller phages. Their communities in glacier foreland revealed a distinct pattern between the early (&#x2264;&#x2009;41 years) and late stages (>&#x2009;41 years) based on the macrodiveristy (interspecies diversity) analysis. A significant increase in the diversity of huge phages communities following glacier retreat were observed according to current database. The phages distributed across sites within late stage demonstrated a remarkable higher microdiversity (intraspecies diversity) compared to other geographic range such as the intra early stage, suggesting that glacial retreat is key drivers of the huge phage speciation. Alongside the shift in huge phage communities, we also noted an evolutionary and functional transition between the early and late stages. The identification of abundant CRISPR-Cas12 and type IV restriction-modification (RM) systems in huge phages indicates their complex mechanisms for adaptive immunity.<br><br>CONCLUSIONS: Overall, this study unravels the importance of climate change in shaping the composition, evolution, and function of soil huge phage communities, and such further understanding of soil huge phages is vital for broader inclusion in soil ecosystem models. Video Abstract.}, }
@article {pmid39838431, year = {2025}, author = {Sun, Q and Li, BR and Li, DH and Wang, XY and Wang, QY and Jiang, ZM and Ning, SB and Sun, T}, title = {WKB ameliorates DSS-induced colitis through inhibiting enteric glial cells activation and altering the intestinal microbiota.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {93}, pmid = {39838431}, issn = {1479-5876}, support = {No. 22YXQN034//Air Force Medical Center Youth Talent Program Project/ ; No. 2020-4-5123//Capital's Funds for Health Improvement and Research/ ; }, mesh = {Animals ; *Colitis/microbiology/chemically induced/pathology/drug therapy ; *Gastrointestinal Microbiome/drug effects ; Mice, Inbred C57BL ; Dextran Sulfate ; Male ; *Neuroglia/drug effects/pathology ; Cytokines/metabolism ; Mice ; Inflammation/pathology ; Colon/pathology ; Intestinal Mucosa/pathology ; }, abstract = {BACKGROUND: Inflammatory bowel disease (IBD) is a chronic condition influenced by diet, which affects gut microbiota and immune functions. The rising prevalence of IBD, linked to Western diets in developing countries, highlights the need for dietary interventions. This study aimed to assess the impact of white kidney beans (WKB) on gut inflammation and microbiota changes, focusing on their effects on enteric glial cells (EGCs) and immune activity in colitis.<br><br>METHODS: Male C57BL/6 mice were divided into four groups: normal diet (ND), ND with 2.5% dextran sulfate sodium (DSS) for colitis induction, ND with 20% WKB, and WKB with 2.5% DSS. The dietary intervention lasted 17 weeks, with DSS given in the final week. Colonic inflammation was assessed by body weight, disease activity index, and histopathology. Epithelial barrier integrity was evaluated using immunofluorescence, transmission electron microscopy, and permeability assays. EGCs activity was analyzed via immunofluorescence and quantitative real-time PCR. Immune responses were measured using flow cytometry and cytokine profiling, while gut microbiota changes were examined through metagenomic sequencing.<br><br>RESULTS: WKB supplementation significantly alleviated DSS-induced colitis in mice, evidenced by reduced weight loss, disease activity, and improved colonic histology. This effect was linked to enhanced mucosal barrier integrity, seen through increased tight junction protein and Muc2 expression, accompanied by favorable ultrastructural changes. WKB modulated EGCs activity via TNF-like cytokine 1&#xa0;A inhibition, resulting in reduced glial fibrillary acidic protein expression. Immunologically, it downregulated Th1 and Th17 pro-inflammatory cells, increased Treg cells, and altered cytokine profiles (reduced TNF-&#x3b1;, IFN-&#x3b3;, IL-17; increased IL-10). Metagenomic analysis showed that WKB restored gut microbiota balance, particularly enhancing beneficial bacteria like Akkermansia. KEGG pathway analysis further indicated that WKB supplementation improved key metabolic pathways, notably those related to phenylalanine, tyrosine, and tryptophan biosynthesis, thereby countering DSS-induced metabolic disruptions.<br><br>CONCLUSIONS: WKB shows promise for treating IBD by enhancing mucosal barriers, inhibiting EGCs activity, balancing Th1/Th17/Treg cells, and restoring gut microbiota and metabolic homeostasis, thereby alleviating colitis symptoms.}, }
@article {pmid39838419, year = {2025}, author = {Liu, X and Ding, H and Zhang, X and Ta, N and Zhao, J and Zhang, Q and Liu, H and Sun, M and Zhang, X}, title = {Dynamic changes in the gastrointestinal microbial communities of Gangba sheep and analysis of their functions in plant biomass degradation at high altitude.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {17}, pmid = {39838419}, issn = {2049-2618}, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Sheep/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Altitude ; Animal Feed/analysis ; Metagenome ; Biomass ; Archaea/classification/genetics/isolation &amp; purification ; *Gastrointestinal Tract/microbiology ; Metagenomics/methods ; Rumen/microbiology ; }, abstract = {BACKGROUND: While Gangba sheep being well known for their unique flavour and nutritional value, harsh environmental factors negatively affect their growth and development, leading to poor productivity. The gastrointestinal tract microbiota plays an important role in host nutrient absorption and metabolism. The identification of dynamic changes in the gastrointestinal microbial communities and their functions is an important step towards improving animal production performance and health.<br><br>RESULTS: A comprehensive multi-omics survey of the microbial communities of the Gangba sheep gastrointestinal tract was performed under three distinct feeding strategies: natural grazing, semi-grazing with supplementation, and barn feeding. The dynamic changes, cross-kingdom partnerships and functional potential profiles were analysed and the results revealed that the feeding strategies had a greater impact on the microbial communities than the site of the gastrointestinal tract. The different microbial associations among the groups were revealed by co-occurrence networks based on the amplicon sequence variants (ASVs). Moreover, a Gangba sheep gastrointestinal microbial genomic catalogue was constructed for the first time, including 1146 metagenome-assembled genomes (MAGs) with completeness&#x2009;>&#x2009;50% and contamination&#x2009;<&#x2009;10%, among which, 504 bacterial and 15 archaeal MAGs were of high quality with completeness&#x2009;>&#x2009;80% and contamination&#x2009;<&#x2009;10%. About 40% of the high-quality MAGs displaying enzyme activity were related to the microbial species that contribute to plant biomass degradation. Most of these enzymes were expressed in rumen metatranscriptome datasets, especially in Prevotella spp. and Ruminococcus spp., suggesting that gastrointestinal microbial communities in ruminants play major roles in the digestion of plant biomass to provide nutrition and energy for the host.<br><br>CONCLUSIONS: These findings suggest that feeding strategies are the primary cause of changes in the gastrointestinal microbiome. Diversification of livestock feed might be an effective strategy to maintain the diversity and ecological multifunctionality of microbial communities in the gastrointestinal tract. Additionally, the catalogue of microbial genomes and the encoded biomass-degrading enzymes identified here provide insights into the potential microbial functions of the gastrointestinal tract of Gangba sheep at high altitudes. This paves the way for microbial interventions to improve the growth performance, productivity and product quality of ruminant livestock. Video Abstract.}, }
@article {pmid39838369, year = {2025}, author = {Fan, J and Zeng, F and Zhong, H and Cai, J and Shen, W and Cheng, C and He, C and Liu, Y and Zhou, Y and Chen, S and Zhu, Y and Liu, T and Zheng, JS and Wang, L and Chen, YM and Ma, W and Zhou, D}, title = {Potential roles of cigarette smoking on gut microbiota profile among Chinese men.}, journal = {BMC medicine}, volume = {23}, number = {1}, pages = {25}, pmid = {39838369}, issn = {1741-7015}, mesh = {Adult ; Humans ; Male ; Middle Aged ; China ; *Cigarette Smoking/adverse effects ; *Gastrointestinal Microbiome ; RNA, Ribosomal, 16S/genetics ; East Asian People ; }, abstract = {BACKGROUND: Cigarette smoking is posited as a potential factor in disrupting the balance of the human gut microbiota. However, existing studies with limited sample size have yielded inconclusive results.<br><br>METHODS: Here, we assessed the association between cigarette smoking and gut microbial profile among Chinese males from four independent studies (N total&#x2009;=&#x2009;3308). Both 16S rRNA and shotgun metagenomic sequencing methods were employed, covering 206 genera and 237 species. Microbial diversity and abundance were compared among non-smokers, current smokers, and former smokers.<br><br>RESULTS: Actinomyces[g], Atopobium[g], Haemophilus[g], Turicibacter[g], and Lachnospira[g] were found to be associated with smoking status (current smokers vs. non-smokers). Metagenomic data provided a higher resolution at the species level, particularly for the Actinomyces[g] branch. Additionally, serum &#x3b3;-glutamylcysteine (&#x3b3;-Glu-Cys) was found to have a potential role in connecting smoking and Actinomyces[g]. Furthermore, we revealed putative mediation roles of the gut microbiome in the associations between smoking and common diseases including cholecystitis and type 2 diabetes.<br><br>CONCLUSIONS: We characterized the gut microbiota profile in male smokers and further revealed their potential involvement in mediating the impact of smoking on health outcomes. These findings advance our understanding of the intricate association between cigarette smoking and the gut microbiome.}, }
@article {pmid39838107, year = {2025}, author = {Teso-Pérez, C and López-Gazcón, A and Peralta-Sánchez, JM and Martínez-Bueno, M and Valdivia, E and Fárez-Vidal, ME and Martín-Platero, AM}, title = {Bacteriocin-Producing Enterococci Modulate Cheese Microbial Diversity.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {175}, pmid = {39838107}, issn = {1432-184X}, support = {PEJ2018-003019-A//Plan Estatal de Garant&#xed;a Juvenil (Fondo Social Europeo, Gobierno de Espa&#xf1;a/ ; Group BIO 309//PAIDI Program/ ; A-BIO-083-UGR18//Programa Operativo FEDER Andaluc&#xed;a 2014-2020/ ; }, mesh = {*Cheese/microbiology ; *Bacteriocins/biosynthesis/metabolism ; *Enterococcus/metabolism/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Food Microbiology ; Biodiversity ; Microbiota ; Animals ; Milk/microbiology ; }, abstract = {Cheese production involves various lactic acid bacteria (LAB) that break down lactose, milk proteins, and fats, producing key nutrients and influencing the cheese's flavor. They form communities that play a crucial role in determining the cheese's organoleptic properties. The composition of cheeses' microbial communities is shaped by physicochemical factors (e.g., temperature, pH, and salinity) and biological factors (i.e. microbial interactions). While starter cultures are introduced to control these communities, non-starter LAB represent a significant portion of the final microbial assemblage, but their interactions remain unclear. LAB often produce bacteriocins, antimicrobial peptides that antagonize other bacteria, but their role within LAB communities is not fully understood. This study aimed to assess the impact of bacteriocin production on LAB diversity in cheese, using Enterococcus as a model organism, a common bacteriocin producer. We analyzed enterocin production of enterococcal isolates by antimicrobial assays and microbial diversity differences in raw milk cheeses by two approaches: 16S RNA gene amplicon metagenomic sequencing for the whole microbial community and multi-locus sequence analysis (MLSA) for the enterococcal diversity. Our results revealed that LAB communities were dominated by lactococci, lactobacilli, and streptococci, with enterococci present in lower numbers. However, cheeses containing bacteriocin-producing enterococci exhibited higher microbial diversity. Interestingly, the highest diversity occurred at low levels of bacteriocin producers, but this effect was not observed within enterococcal populations. These findings suggest that bacteriocin production plays a key role in shaping LAB communities during cheese ripening, although further research is needed to understand its broader implications in other microbial ecosystems.}, }
@article {pmid39837331, year = {2025}, author = {Valdés-Mas, R and Leshem, A and Zheng, D and Cohen, Y and Kern, L and Zmora, N and He, Y and Katina, C and Eliyahu-Miller, S and Yosef-Hevroni, T and Richman, L and Raykhel, B and Allswang, S and Better, R and Shmueli, M and Saftien, A and Cullin, N and Slamovitz, F and Ciocan, D and Ouyang, KS and Mor, U and Dori-Bachash, M and Molina, S and Levin, Y and Atarashi, K and Jona, G and Puschhof, J and Harmelin, A and Stettner, N and Chen, M and Suez, J and Honda, K and Lieb, W and Bang, C and Kori, M and Maharshak, N and Merbl, Y and Shibolet, O and Halpern, Z and Shouval, DS and Shamir, R and Franke, A and Abdeen, SK and Shapiro, H and Savidor, A and Elinav, E}, title = {Metagenome-informed metaproteomics of the human gut microbiome, host, and dietary exposome uncovers signatures of health and inflammatory bowel disease.}, journal = {Cell}, volume = {188}, number = {4}, pages = {1062-1083.e36}, doi = {10.1016/j.cell.2024.12.016}, pmid = {39837331}, issn = {1097-4172}, mesh = {Humans ; *Inflammatory Bowel Diseases/microbiology/metabolism ; *Gastrointestinal Microbiome/genetics ; Animals ; *Proteomics/methods ; Mice ; *Metagenome ; Feces/microbiology ; *Exposome ; Dysbiosis/microbiology ; Male ; Diet ; Female ; Mice, Inbred C57BL ; Host Microbial Interactions ; }, abstract = {Host-microbiome-dietary interactions play crucial roles in regulating human health, yet their direct functional assessment remains challenging. We adopted metagenome-informed metaproteomics (MIM), in mice and humans, to non-invasively explore species-level microbiome-host interactions during commensal and pathogen colonization, nutritional modification, and antibiotic-induced perturbation. Simultaneously, fecal MIM accurately characterized the nutritional exposure landscape in multiple clinical and dietary contexts. Implementation of MIM in murine auto-inflammation and in human inflammatory bowel disease (IBD) characterized a "compositional dysbiosis" and a concomitant species-specific "functional dysbiosis" driven by suppressed commensal responses to inflammatory host signals. Microbiome transfers unraveled early-onset kinetics of these host-commensal cross-responsive patterns, while predictive analyses identified candidate fecal host-microbiome IBD biomarker protein pairs outperforming S100A8/S100A9 (calprotectin). Importantly, a simultaneous fecal nutritional MIM assessment enabled the determination of IBD-related consumption patterns, dietary treatment compliance, and small intestinal digestive aberrations. Collectively, a parallelized dietary-bacterial-host MIM assessment functionally uncovers trans-kingdom interactomes shaping gastrointestinal ecology while offering personalized diagnostic and therapeutic insights into microbiome-associated disease.}, }
@article {pmid39835966, year = {2025}, author = {Levine, BH and Hoffman, JM}, title = {Microbiome transplants may not improve health and longevity in Drosophila melanogaster.}, journal = {Biology open}, volume = {14}, number = {1}, pages = {}, pmid = {39835966}, issn = {2046-6390}, support = {R00 AG059920/AG/NIA NIH HHS/United States ; //Augusta University; University of South Carolina/ ; R00AG059920/NH/NIH HHS/United States ; }, mesh = {Animals ; *Drosophila melanogaster/microbiology/physiology ; *Longevity ; Female ; Male ; *Gastrointestinal Microbiome ; *Microbiota ; }, abstract = {The gut microbiome, which is composed of bacteria, viruses, and fungi, and is involved in multiple essential physiological processes, changes measurably as a person ages, and can be associated with negative health outcomes. Microbiome transplants have been proposed as a method to improve gut function and reduce or reverse multiple disorders, including age-related diseases. Here, we take advantage of the laboratory model organism, Drosophila melanogaster, to test the effects of transplanting the microbiome of a young fly into middle-aged flies, across multiple genetic backgrounds and both sexes, to test whether age-related lifespan could be increased, and late-life physical health declines mitigated. Our results suggest that, overall, microbiome transplants do not improve longevity and may even be detrimental in flies, and the health effects of microbiome transplants were minor, but sex- and genotype-dependent. This discovery supports previous evidence that axenic flies, those with no gut microbiome, live healthier and longer lives than their non-axenic counterparts. The results of this study suggest that, at least for fruit flies, microbiome transplants may not be a viable intervention to improve health and longevity, though more research is still warranted.}, }
@article {pmid39833973, year = {2025}, author = {Rampanelli, E and Romp, N and Troise, AD and Ananthasabesan, J and Wu, H and Gül, IS and De Pascale, S and Scaloni, A and Bäckhed, F and Fogliano, V and Nieuwdorp, M and Bui, TPN}, title = {Gut bacterium Intestinimonas butyriciproducens improves host metabolic health: evidence from cohort and animal intervention studies.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {15}, pmid = {39833973}, issn = {2049-2618}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; Humans ; Mice ; *Clostridiales/metabolism/genetics ; Male ; Lysine/metabolism/analogs &amp; derivatives ; Feces/microbiology ; Female ; Fructose/metabolism ; Obesity/microbiology/metabolism ; Fermentation ; Butyrates/metabolism ; Middle Aged ; Cohort Studies ; Adult ; Metagenomics ; }, abstract = {BACKGROUND: The human gut microbiome strongly influences host metabolism by fermenting dietary components into metabolites that signal to the host. Our previous work has shown that Intestinimonas butyriciproducens is a prevalent commensal bacterium with the unique ability to convert dietary fructoselysine to butyrate, a well-known signaling molecule with proven health benefits. Dietary fructoselysine is an abundant Amadori product formed in foods during thermal treatment and is part of foods rich in dietary advanced glycation end products which have been associated with cardiometabolic disease. It is therefore of interest to investigate the causal role of this bacterium and fructoselysine metabolism in metabolic disorders.<br><br>RESULTS: We assessed associations of I. butyriciproducens with metabolic risk biomarkers at both strain and functional levels using a human cohort characterized by fecal metagenomic analysis. We observed that the level of the bacterial strain as well as fructoselysine fermentation genes were negatively associated with BMI, triglycerides, HbA1c, and fasting insulin levels. We also investigated the fructoselysine degradation capacity within the Intestinimonas genus using a culture-dependent approach and found that I. butyriciproducens is a key player in the butyrogenic fructoselysine metabolism in the gut. To investigate the function of I. butyriciproducens in host metabolism, we used the diet-induced obesity mouse model to mimic the human metabolic syndrome. Oral supplementation with I. butyriciproducens counteracted body weight gain, hyperglycemia, and adiposity. In addition, within the inguinal white adipose tissue, bacterial administration reduced inflammation and promoted pathways involved in browning and insulin signaling. The observed effects may be partly attributable to the formation of the short-chain fatty acids butyrate from dietary fructoselysine, as butyrate plasma and cecal levels were significantly increased by the bacterial strain, thereby contributing to the systemic effects of the bacterial treatment.<br><br>CONCLUSIONS: I.&#xa0;butyriciproducens ameliorates host metabolism in the context of obesity and may therefore be a good candidate for new microbiota-therapeutic approaches to prevent or treat metabolic diseases. Video Abstract.}, }
@article {pmid39833544, year = {2025}, author = {Yan, X and Liu, Y and Hu, T and Huang, Z and Li, C and Guo, L and Liu, Y and Li, N and Zhang, H and Sun, Y and Yi, L and Wu, J and Feng, J and Zhang, F and Jiang, T and Tu, C and He, B}, title = {A compendium of 8,176 bat RNA viral metagenomes reveals ecological drivers and circulation dynamics.}, journal = {Nature microbiology}, volume = {10}, number = {2}, pages = {554-568}, pmid = {39833544}, issn = {2058-5276}, support = {32192423//National Natural Science Foundation of China (National Science Foundation of China)/ ; 32022083//National Natural Science Foundation of China (National Science Foundation of China)/ ; 32192424//National Natural Science Foundation of China (National Science Foundation of China)/ ; 32371562//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Chiroptera/virology ; Animals ; *Metagenome ; China ; *Virome/genetics ; *RNA, Viral/genetics ; Humans ; *RNA Viruses/genetics/classification/isolation &amp; purification ; Phylogeny ; Genetic Variation ; Metagenomics ; }, abstract = {Bats are natural hosts for many emerging viruses for which spillover to humans is a major risk, but the diversity and ecology of bat viruses is poorly understood. Here we generated 8,176 RNA viral metagenomes by metatranscriptomic sequencing of organ and swab samples from 4,143 bats representing 40 species across 52 locations in China. The resulting database, the BtCN-Virome, expands bat RNA virus diversity by over 3.4-fold. Some viruses in the BtCN-Virome are traced to mammals, birds, arthropods, mollusks and plants. Diet, infection dynamics and environmental parameters such as humidity and forest coverage shape virus distribution. Compared with those in the wild, bats dwelling in human settlements harboured more diverse viruses that also circulated in humans and domestic animals, including Nipah and Lloviu viruses not previously reported in China. The BtCN-Virome provides important insights into the genetic diversity, ecological drivers and circulation dynamics of bat viruses, highlighting the need for surveillance of bats near human settlements.}, }
@article {pmid39833341, year = {2025}, author = {Zhang, C and Yu, Y and Yue, L and Chen, Y and Chen, Y and Liu, Y and Guo, C and Su, Q and Xiang, Z}, title = {Gut microbiota profiles of sympatric snub-nosed monkeys and macaques in Qinghai-Tibetan Plateau show influence of phylogeny over diet.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {95}, pmid = {39833341}, issn = {2399-3642}, support = {32171487//National Natural Science Foundation of China (National Science Foundation of China)/ ; 31870509//National Natural Science Foundation of China (National Science Foundation of China)/ ; 32400413//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Phylogeny ; Tibet ; *Diet ; RNA, Ribosomal, 16S/genetics ; Macaca mulatta/microbiology ; *Macaca/microbiology ; *Presbytini/microbiology ; Sympatry ; }, abstract = {The unique environment of the Qinghai-Tibetan Plateau provides a great opportunity to study how primate intestinal microorganisms adapt to ecosystems. The 16S rRNA gene amplicon and metagenome analysis were conducted to investigate the correlation between gut microbiota in primates and other sympatric animal species living between 3600 and 4500 m asl. Results showed that within the same geographical environment, Macaca mulatta and Rhinopithecus bieti exhibited a gut microbiome composition similar to that of Tibetan people, influenced by genetic evolution of host, while significantly differing from other distantly related animals. The gut microbiota of plateau species has developed similar strategies to facilitate their hosts' adaptation to specific environments, including broadening its dietary niche and enhancing energy absorption. These findings will enhance our comprehension of the significance of primate gut microbiota in adapting to specific habitats.}, }
@article {pmid39832809, year = {2025}, author = {Miebach, J and Green, D and Strittmatter, M and Mallinger, C and Le Garrec, L and Zhang, QY and Foucault, P and Kunz, C and Gachon, CMM}, title = {Importance, structure, cultivability, and resilience of the bacterial microbiota during infection of laboratory-grown Haematococcus spp. by the blastocladialean pathogen Paraphysoderma sedebokerense: evidence for a domesticated microbiota and its potential for biocontrol.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {2}, pages = {}, pmid = {39832809}, issn = {1574-6941}, support = {BB/P027806/1//UK Research and Innovation/ ; H2020-BG1-2016//Horizon Europe/ ; //MNHN/ ; }, mesh = {*Microbiota ; *Bacteria/classification/genetics/growth &amp; development/isolation &amp; purification ; *Chlorophyta/microbiology/growth &amp; development ; Plant Diseases/microbiology ; }, abstract = {Industrial production of the unicellular green alga Haematococcus lacustris is compromised by outbreaks of the fungal pathogen Paraphysoderma sedebokerense (Blastocladiomycota). Here, using axenic algal and fungal cultures and antibiotic treatments, we show that the bacterial microbiota of H. lacustris is necessary for the infection by P. sedebokerense and that its modulation affects the outcome of the interaction. We combined metagenomics and laboratory cultivation to investigate the diversity of the bacterial microbiota associated to three Haematococcus species and monitor its change upon P. sedebokerense infection. We unveil three types of distinct, reduced bacterial communities, which likely correspond to keystone taxa in the natural Haematococcus spp. microbiota. Remarkably, the taxonomic composition and functionality of these communities remained stable during infection. The major bacterial taxa identified in this study have been cultivated by us or others, paving the way to developing synthetic communities to experimentally explore interactions within this tripartite system. We discuss our results in the light of emerging evidence concerning the structuring and domestication of plant and animal microbiota, thus providing novel experimental tools and a new conceptual framework necessary to enable the engineering of Haematococcus spp. microbiota toward the biocontrol of P. sedebokerense.}, }
@article {pmid39828685, year = {2025}, author = {Chen, Y and Yi, ZT and Yu, HL and Wu, XY and Wang, JP and Nie, C and Li, H and Li, SH and Yan, QL and He, TW and Chen, MC and Yang, XY and Wen, JY and Lv, LJ}, title = {Does preeclampsia impact the gut microbiota of preterm offspring during early infancy?.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {84}, pmid = {39828685}, issn = {1479-5876}, support = {2019A1515110389//Basic and Applied Basic Research Foundation of Guangdong Province/ ; }, mesh = {Humans ; Female ; *Gastrointestinal Microbiome ; Pregnancy ; *Pre-Eclampsia/microbiology ; *Infant, Premature ; Infant, Newborn ; Feces/microbiology ; Bacteria ; Adult ; }, abstract = {Preeclampsia (PE) is a pregnancy complication characterized by high blood pressure and organ damage. This study investigates the differences in the gut microbiota between preterm neonates born to mothers with PE and those born to mothers without PE (PR), aiming to understand how maternal health conditions like PE influence neonatal gut microbiota. The early gut microbiota plays a crucial role in neonatal health, and disturbances in its development can have long-term consequences. Fecal samples were collected from preterm neonates of PE and PR mothers at 2 and 6 weeks postpartum and analyzed using shotgun metagenomic sequencing. We found that PE significantly affected the gut microbial composition of preterm neonates, particularly at 2 weeks postpartum. The gut microbial diversity in the PE_2 group was notably lower compared to the PR_2 group, with no significant difference observed between the PR_6 and PE_6 groups. At the phylum level, Firmicutes and Proteobacteria were predominant, with significant differences observed, particularly a lower abundance of Actinobacteria in the PE_2 group. At the genus level, Escherichia, Enterococcus, and Klebsiella were more prevalent in the PE_2 group, whereas Bifidobacterium and Cutibacterium dominated the PR_2 group. The gut virome analysis showed no significant differences among the groups. Functional analysis revealed distinct metabolic pathway activities across the groups, suggesting that early disturbances due to PE impact the establishment of healthy gut microbiota. These findings underscore the substantial influence of maternal health on the early development of the neonatal gut microbiota and highlight the potential long-term health consequences. Additionally, the differences in metabolic pathways further emphasize the impact of preeclampsia on gut microbiota functionality.}, }
@article {pmid39827796, year = {2025}, author = {He, LX and He, LY and Tang, YJ and Qiao, LK and Xu, MC and Zhou, ZY and Bai, H and Zhang, M and Ying, GG}, title = {Deciphering spread of quinolone resistance in mariculture ponds: Cross-species and cross-environment transmission of resistome.}, journal = {Journal of hazardous materials}, volume = {487}, number = {}, pages = {137198}, doi = {10.1016/j.jhazmat.2025.137198}, pmid = {39827796}, issn = {1873-3336}, mesh = {*Quinolones/pharmacology ; *Ponds/microbiology ; *Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Bacterial/genetics ; Animals ; Bacteria/genetics/drug effects ; Aquaculture ; Microbiota ; Genes, Bacterial ; Gills/microbiology ; Seawater/microbiology ; *Water Pollutants, Chemical ; }, abstract = {Mariculture is known to harbor antibiotic resistance genes (ARGs), which can be released into marine ecosystems via oceanic farming ponds, posing a public health concern. In this study, metagenomic sequencing was used to decipher the profiles of quinolone-resistant microbiomes and the mechanisms of quinolone resistance in sediment, seawater, and fish gill samples from five mariculture ponds. Residues of both veterinary-specific (enrofloxacin and sarafloxacin) and prohibited quinolones (ofloxacin, ciprofloxacin, pefloxacin, norfloxacin, and lomefloxacin) were detected. We identified a total of 285 subtypes of ARGs across all samples. Pathogens played a crucial role in the prevalence and distribution of these ARGs. Out of the annotated 629 bacterial species, 42 were identified as pathogenic, predominantly belonging to the Proteobacteria phylum. Notably, the Acinetobacter genus was prevalent in the gills and exhibited correlations with various ARGs. The presence of the plasmid-mediated quinolone resistance (PMQR) genes in various bacterial species and the identification of sulfonamide resistance genes across different samples indicated the potential for cross-species and cross-environment transmission of ARGs. Metagenomic binning revealed that Exiguobacterium harbored five ARGs (vanA, vanB, fexA, msr(G), mefF), while Shewanella carried six ARGs (blaOXA-436, adeF, qacl, ANT (2'')-Ia, dfrA1, rsmA). Mutations in gyrA and parC contributed to quinolone resistance in these multidrug-resistant Exiguobacterium and Shewanella. Our findings suggest a potential for ARG transmission across various bacterial species and environments in mariculture. This study emphasized the risk of resistance spread within the mariculture ecosystem.}, }
@article {pmid39827519, year = {2025}, author = {Lin, W and Zhao, K and Wu, Q and Xu, F and Cui, L and Lin, H and Ye, C and Yu, X}, title = {Biofilms on pipelines shape the microbiome and antibiotic resistome in drinking water.}, journal = {Water research}, volume = {274}, number = {}, pages = {123136}, doi = {10.1016/j.watres.2025.123136}, pmid = {39827519}, issn = {1879-2448}, mesh = {*Biofilms ; *Drinking Water/microbiology ; *Microbiota ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Microbial/genetics ; }, abstract = {Biofilms in the drinking water distribution system (DWDS) provide shelter for pathogens and antibiotic resistance genes (ARGs). However, how biofilms alter the microbiome and antibiotic resistome in tap water, as well as the precise quantitative evaluation of their health risks, remains unclear. Herein, biofilm reactors supplied with municipal drinking water were operated for 120 days. Metagenomic sequencing identified significant differences in microbial compositions among the biofilms, influent, and effluents. A total of 69-305 ARGs were detected in this DWDS, and ARG abundances increased in the biofilms (0.246-1.576 cpc) and effluents (0.309-0.503 cpc) compared to the influent (0.131 cpc). Metagenomic assembly pinpointed potential pathogenic ARG hosts such as Acinetobacter, Pseudomonas, and Escherichia. The co-occurrence of ARGs and mobile genetic elements indicated potential mobility, which was further supported by transformation assays demonstrating gene transfers at a frequency of 10[-6]. Furthermore, source tracking revealed that biofilms contributed high proportions (19 %-34 %) to the ARG profiles of effluents. The ARG risk scores increased from the influent (20.39) to the effluents (39.85-55.50), with highest level (55.50) in the cast iron effluent. Overall, this study provides novel insights into the impacts of biofilm growth on the microbiome and antibiotic resistome in tap water, along with their potential health risks in the DWDS.}, }
@article {pmid39827261, year = {2025}, author = {Guccione, C and Patel, L and Tomofuji, Y and McDonald, D and Gonzalez, A and Sepich-Poore, GD and Sonehara, K and Zakeri, M and Chen, Y and Dilmore, AH and Damle, N and Baranzini, SE and Hightower, G and Nakatsuji, T and Gallo, RL and Langmead, B and Okada, Y and Curtius, K and Knight, R}, title = {Incomplete human reference genomes can drive false sex biases and expose patient-identifying information in metagenomic data.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {825}, pmid = {39827261}, issn = {2041-1723}, support = {R01 CA241728/CA/NCI NIH HHS/United States ; DP1 AT010885/AT/NCCIH NIH HHS/United States ; R01 CA270235/CA/NCI NIH HHS/United States ; AGA Research Scholar Award AGA2022-13-05//AGA Research Foundation/ ; NIH/NIGMS T32GM007198//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R21 HG013433/HG/NHGRI NIH HHS/United States ; T32 GM007198/GM/NIGMS NIH HHS/United States ; CDC award 75D301-22-C-14717//U.S. Department of Health &amp; Human Services | Centers for Disease Control and Prevention (CDC)/ ; NIH Pioneer DP1AT010885//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; U19 AG063744/AG/NIA NIH HHS/United States ; NCI U24CA248454//U.S. Department of Health &amp; Human Services | NIH | National Cancer Institute (NCI)/ ; P30 DK120515/DK/NIDDK NIH HHS/United States ; P30 CA023100/CA/NCI NIH HHS/United States ; U24 CA248454/CA/NCI NIH HHS/United States ; }, mesh = {Humans ; *Metagenomics/methods ; *Genome, Human/genetics ; Female ; Male ; High-Throughput Nucleotide Sequencing ; Microbiota/genetics ; Metagenome/genetics ; Computational Biology/methods ; Feces/microbiology ; *Sexism ; }, abstract = {As next-generation sequencing technologies produce deeper genome coverages at lower costs, there is a critical need for reliable computational host DNA removal in metagenomic data. We find that insufficient host filtration using prior human genome references can introduce false sex biases and inadvertently permit flow-through of host-specific DNA during bioinformatic analyses, which could be exploited for individual identification. To address these issues, we introduce and benchmark three host filtration methods of varying throughput, with concomitant applications across low biomass samples such as skin and high microbial biomass datasets including fecal samples. We find that these methods are important for obtaining accurate results in low biomass samples (e.g., tissue, skin). Overall, we demonstrate that rigorous host filtration is a key component of privacy-minded analyses of patient microbiomes and provide computationally efficient pipelines for accomplishing this task on large-scale datasets.}, }
@article {pmid39826029, year = {2025}, author = {Reuben, RC and Torres, C}, title = {Integrating the milk microbiome signatures in mastitis: milk-omics and functional implications.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {41}, number = {2}, pages = {41}, pmid = {39826029}, issn = {1573-0972}, mesh = {*Milk/microbiology/chemistry ; Animals ; *Microbiota ; Female ; Proteomics/methods ; Metagenomics ; Cattle ; *Mastitis, Bovine/microbiology ; *Mastitis/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Metabolomics ; Humans ; }, abstract = {Mammalian milk contains a variety of complex bioactive and nutritional components and microorganisms. These microorganisms have diverse compositions and functional roles that impact host health and disease pathophysiology, especially mastitis. The advent and use of high throughput omics technologies, including metagenomics, metatranscriptomics, metaproteomics, metametabolomics, as well as culturomics in milk microbiome studies suggest strong relationships between host phenotype and milk microbiome signatures in mastitis. While single omics studies have undoubtedly contributed to our current understanding of milk microbiome and mastitis, they often provide limited information, targeting only a single biological viewpoint which is insufficient to provide system-wide information necessary for elucidating the biological footprints and molecular mechanisms driving mastitis and milk microbiome dysbiosis. Therefore, integrating a multi-omics approach in milk microbiome research could generate new knowledge, improve the current understanding of the functional and structural signatures of the milk ecosystem, and provide insights for sustainable mastitis control and microbiome management.}, }
@article {pmid39825576, year = {2025}, author = {Fouché, J and Lebre, PH and Melville, HA and Cowan, DA}, title = {The Functional and Structural Succession of Mesic-Grassland Soil Microbiomes Beneath Decomposing Large Herbivore Carcasses.}, journal = {Environmental microbiology}, volume = {27}, number = {1}, pages = {e70022}, pmid = {39825576}, issn = {1462-2920}, mesh = {Animals ; *Soil Microbiology ; *Microbiota ; *Herbivory ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Grassland ; RNA, Ribosomal, 16S/genetics ; Soil/chemistry ; }, abstract = {Plant detritus is abundant in grasslands but decomposes slowly and is relatively nutrient-poor, whereas animal carcasses are labile and nutrient-rich. Recent studies have demonstrated that labile nutrients from carcasses can significantly alter the long-term soil microbial function at an ecosystem scale. However, there is a paucity of knowledge on the functional and structural response and temporal scale of soil microbiomes beneath large herbivore carcasses. This study compared microbiome functions and structures of soil beneath Connochaetes taurinus (hereafter 'wildebeest') carcasses at various postmortem intervals of decomposition to matched control samples over 18 months. Microbial functions were compared by their community-level physiological profiles determined by sole-carbon substrate utilisation and structures by metagenomic sequences using 16S rRNA gene markers. Overall metabolism and metabolic diversity remained increased and functionally dissimilar to control soils throughout the experimental period, with successive sole-carbon substrate utilisation observed. Conversely, diversity was initially reduced and structurally dissimilar from the control soil but recovered within the experimental period. The study contributes to the knowledge of carcass decomposition by investigating the long-term soil microbiome dynamics resulting from large herbivore carcasses decomposing in a mesic grassland. Microbial functional succession and ecologically relevant bacterial biomarkers of soil beneath the decomposing carcasses were identified for various postmortem intervals.}, }
@article {pmid39824780, year = {2025}, author = {Wu, X and Peng, J and Malik, AA and Peng, Z and Luo, Y and Fan, F and Lu, Y and Wei, G and Delgado-Baquerizo, M and Liesack, W and Jiao, S}, title = {A Global Relationship Between Genome Size and Encoded Carbon Metabolic Strategies of Soil Bacteria.}, journal = {Ecology letters}, volume = {28}, number = {1}, pages = {e70064}, doi = {10.1111/ele.70064}, pmid = {39824780}, issn = {1461-0248}, support = {42122050//National Science Foundation for Excellent Young Scholars of China/ ; 42277307 &amp; 41977038//National Natural Science Foundation of China/ ; 2021YFD1900500//National Key Research and Development Program of China/ ; }, mesh = {*Soil Microbiology ; *Carbon/metabolism ; *Genome Size ; *Bacteria/genetics/metabolism ; *Genome, Bacterial ; Gene Transfer, Horizontal ; Microbiota ; Biomass ; }, abstract = {Microbial traits are critical for carbon sequestration and degradation in terrestrial ecosystems. Yet, our understanding of the relationship between carbon metabolic strategies and genomic traits like genome size remains limited. To address this knowledge gap, we conducted a global-scale meta-analysis of 2650 genomes, integrated whole-genome sequencing data, and performed a continental-scale metagenomic field study. We found that genome size was tightly associated with an increase in the ratio between genes encoding for polysaccharide decomposition and biomass synthesis that we defined as the carbon acquisition-to-biomass yield ratio (A/Y). We also show that horizontal gene transfer played a major evolutionary role in the expanded bacterial capacities in carbon acquisition. Our continental-scale field study further revealed a significantly negative relationship between the A/Y ratio and soil organic carbon stocks. Our work demonstrates a global relationship between genome size and the encoded carbon metabolic strategies of soil bacteria across terrestrial microbiomes.}, }
@article {pmid39824262, year = {2025}, author = {Özdemir, A and Sarzhanov, F and Doğruman-Al, F and Gündoğdu, A and Nalbantoğlu, U and Yozgat, A and Yıldız, BD and Büyüktuncer, Z}, title = {Exploring the complex interplay of Blastocystis, morbid obesity, and bariatric surgery on gut microbial dynamics.}, journal = {Microbial pathogenesis}, volume = {200}, number = {}, pages = {107306}, doi = {10.1016/j.micpath.2025.107306}, pmid = {39824262}, issn = {1096-1208}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Bacteria/classification/genetics/isolation &amp; purification ; *Bariatric Surgery/adverse effects ; *Blastocystis/isolation &amp; purification/genetics ; *Blastocystis Infections ; DNA, Bacterial/genetics ; Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; *Obesity, Morbid/surgery/microbiology ; RNA, Ribosomal, 16S/genetics ; }, abstract = {This study examines Blastocystis dynamics in 15 individuals undergoing sleeve gastrectomy. Molecular detection involved DNA extraction, RT-PCR, and sequencing, while 16S rRNA sequencing via Illumina MiSeq analyzed the intestinal microbiome. Statistical analysis through SPSS considered a significance level of p < 0.05. Postoperative colonization of Blastocystis was observed in previously negative individuals, revealing subtypes and shifts in microbial taxa. Blastocystis-positive participants post-bariatric surgery showed a significant increase in Lachnospira, alongside higher abundances of Bacteroides, Oscillospira, Barnesiellaceae, and Rikenellaceae, with reduced Lactobacillus levels compared to Blastocystis-negative individuals. Collective analysis highlighted higher Clostridiales and RF32 in Blastocystis-positive post-surgery individuals, coupled with decreased Enterobacteriaceae. The study challenges previous notions, suggesting a complex interplay between Blastocystis, morbid obesity, and bariatric surgery. Despite limitations, including small sample sizes and absent gut microbiome diversity comparisons, this pioneering research calls for further investigation into the intricate mechanisms and implications for metabolic health. This study is registered at clinicaltrials.gov (NCT05085769).}, }
@article {pmid39823339, year = {2025}, author = {van der Loos, LM and Steinhagen, S and Stock, W and Weinberger, F and D'hondt, S and Willems, A and De Clerck, O}, title = {Low functional change despite high taxonomic turnover characterizes the Ulva microbiome across a 2000-km salinity gradient.}, journal = {Science advances}, volume = {11}, number = {3}, pages = {eadr6070}, pmid = {39823339}, issn = {2375-2548}, mesh = {*Ulva/microbiology ; *Salinity ; *Microbiota/genetics ; Metagenome ; Metagenomics/methods ; *Bacteria/genetics/classification/metabolism ; Phylogeny ; }, abstract = {The green seaweed Ulva relies on associated bacteria for morphogenesis and is an important model to study algal-bacterial interactions. Ulva-associated bacteria exhibit high turnover across environmental gradients, leading to the hypothesis that bacteria contribute to the acclimation potential of the host. However, the functional variation of these bacteria in relation to environmental changes remains unclear. We analyzed 91 Ulva samples across a 2000-kilometer Atlantic-Baltic Sea salinity gradient using metagenomic sequencing. Metabolic reconstruction of 639 metagenome-assembled genomes revealed widespread potential for carbon, nitrogen, sulfur, and vitamin metabolism. Although the R[2] value for salinity explained 70% of taxonomic variation, it accounted only for 17% of functional variation. The limited variation was attributed to typical high-salinity bacteria exhibiting enrichment in genes for thiamine, pyridoxal, and betaine biosynthesis, which likely contribute to stress mitigation and osmotic homeostasis in response to salinity variations. Our results emphasize the importance of functional profiling to understand the seaweed holobiont and its collective response to environmental change.}, }
@article {pmid39823337, year = {2025}, author = {Wu, D and Seshadri, R and Kyrpides, NC and Ivanova, NN}, title = {A metagenomic perspective on the microbial prokaryotic genome census.}, journal = {Science advances}, volume = {11}, number = {3}, pages = {eadq2166}, pmid = {39823337}, issn = {2375-2548}, mesh = {*Metagenomics/methods ; Phylogeny ; *Archaea/genetics/classification ; *Bacteria/genetics/classification ; *Metagenome ; *Genome, Bacterial ; *Genome, Archaeal ; Humans ; Biodiversity ; }, abstract = {Following 30 years of sequencing, we assessed the phylogenetic diversity (PD) of >1.5 million microbial genomes in public databases, including metagenome-assembled genomes (MAGs) of uncultivated microbes. As compared to the vast diversity uncovered by metagenomic sequences, cultivated taxa account for a modest portion of the overall diversity, 9.73% in bacteria and 6.55% in archaea, while MAGs contribute 48.54% and 57.05%, respectively. Therefore, a substantial fraction of bacterial (41.73%) and archaeal PD (36.39%) still lacks any genomic representation. This unrepresented diversity manifests primarily at lower taxonomic ranks, exemplified by 134,966 species identified in 18,087 metagenomic samples. Our study exposes diversity hotspots in freshwater, marine subsurface, sediment, soil, and other environments, whereas human samples yielded minimal novelty within the context of existing datasets. These results offer a roadmap for future genome recovery efforts, delineating uncaptured taxa in underexplored environments and underscoring the necessity for renewed isolation and sequencing.}, }
@article {pmid39823335, year = {2025}, author = {Santoro, EP and Cárdenas, A and Villela, HDM and Vilela, CLS and Ghizelini, AM and Duarte, GAS and Perna, G and Saraiva, JP and Thomas, T and Voolstra, CR and Peixoto, RS}, title = {Inherent differential microbial assemblages and functions associated with corals exhibiting different thermal phenotypes.}, journal = {Science advances}, volume = {11}, number = {3}, pages = {eadq2583}, pmid = {39823335}, issn = {2375-2548}, mesh = {*Anthozoa/microbiology/physiology ; Animals ; Phenotype ; *Microbiota ; Temperature ; Metagenomics/methods ; Symbiosis ; Bacteria/genetics/classification ; }, abstract = {Certain coral individuals exhibit enhanced resistance to thermal bleaching, yet the specific microbial assemblages and their roles in these phenotypes remain unclear. We compared the microbial communities of thermal bleaching-resistant (TBR) and thermal bleaching-sensitive (TBS) corals using metabarcoding and metagenomics. Our multidomain approach revealed stable distinct microbial compositions between thermal phenotypes. Notably, TBR corals were inherently enriched with microbial eukaryotes, particularly Symbiodiniaceae, linked to photosynthesis, and the biosynthesis of antibiotic and antitumor compounds and glycosylphosphatidylinositol-anchor proteins, crucial for cell wall regulation and metabolite exchange. In contrast, TBS corals were dominated by bacterial metabolic genes related to nitrogen, amino acid, and lipid metabolism. The inherent microbiome differences between TBR and TBS corals, already observed before thermal stress, point to distinct holobiont phenotypes associated to thermal bleaching resistance, offering insights into mechanisms underlying coral response to climate-induced stress.}, }
@article {pmid39821458, year = {2025}, author = {Mathew, DE and Soni, A and Dhimmar, A and Gajjar, A and Parab, AS and Phakatkar, SS and Sahastrabudhe, H and Manohar, CS and Shinde, PB and Mantri, VA}, title = {Characterization, Bio-Prospection, and Comparative Metagenomics of Bacterial Communities Revealing the Predictive Functionalities in Wild and Cultured Samples of Industrially Important Red Seaweed Gracilaria dura.}, journal = {Current microbiology}, volume = {82}, number = {2}, pages = {85}, pmid = {39821458}, issn = {1432-0991}, support = {HCP 024//Council for Scientific and Industrial Research, India/ ; }, mesh = {*Gracilaria/microbiology/growth &amp; development ; Metagenomics ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Phylogeny ; *Microbiota ; Seaweed/microbiology ; RNA, Ribosomal, 16S/genetics ; Metagenome ; }, abstract = {The present study explores the microbial community associated with the industrially important red seaweed Gracilaria dura to determine the diversity and biotechnological potential through culture and metagenomics approaches. In the first part of the investigation, we isolated and characterized 75 bacterial morphotypes, with varied colony characteristics and metabolic diversity from the wild seaweed. Phylogenetic analysis identified isolates in Proteobacteria, Firmicutes, and Actinobacteria, with Bacillus sp. being prevalent. B. licheniformis and Streptomyces sp. were notable in producing important enzymes like L-asparaginase, and polysaccharide lyases. Antimicrobial activity was significant in 21% of isolates, effective against seaweed pathogens such as Vibrio and Xanthomonas. Rhodococcus pyridinivorans showed strong pyridine degradation, suggesting bioremediation potential. Several isolates exhibited phosphate solubilization and nitrate indicating the roles of bacteria as algal growth promoters and biocontrol agents. Subsequent metagenome analysis of wild and cultured samples provides insights into bacterial communities associated with G. dura, revealing their distribution and functional roles. Proteobacteria (~ 95%) dominated the communities, further bacterial groups involved in algal growth, carpospore liberation, stress resistance, biogeochemical cycles, and biomedical applications were identified. A notable difference in bacteriomes was observed between the samples, with 25% remaining stable. The samples are cultured in the lab to generate seedlings for farming and serve as germplasm storage during the monsoon season. Microbiome surveys are crucial for understanding the association of pathogens and the overall health of the seedlings, supporting successful seaweed farming. Our findings provide valuable insights into G. dura-associated microbial communities and their role in algal growth, which has aquacultural implications.}, }
@article {pmid39820425, year = {2025}, author = {Huang, H and Cheng, Z and Wang, Y and Qiao, G and Wang, X and Yue, Y and Gao, Q and Peng, S}, title = {Multi-omics dataset of individual variations in growth performance of large yellow croaker.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {90}, pmid = {39820425}, issn = {2052-4463}, mesh = {Animals ; China ; *Gastrointestinal Microbiome ; Metabolomics ; Metagenomics ; Multiomics ; *Perciformes/growth &amp; development/genetics/microbiology ; Transcriptome ; }, abstract = {Large yellow croaker (Larimichthys crocea) is a highly economically important marine fish species in China. However, substantial individual variations in growth performance have emerged as a limiting factor for the sustainable development of the large yellow croaker industry. Gut microbiota plays a crucial role in fish growth and development by regulating metabolic processes. To explore these dynamics, we employed metagenomics, transcriptomics, and untargeted metabolomics to comprehensively analyze the structure of the intestinal microbiome and its relationship with intestinal metabolism and host gene expression. We constructed association models for "gut microbiota-differentially expressed genes", "differentially expressed genes-metabolites," and "gut microbiota-metabolites." Sequencing data and LC-MS/MS raw data have been deposited in NCBI and MetaboLights databases for public access. Our findings offer critical insights into the molecular mechanisms underlying growth variations in L. crocea and provide valuable data for the selective breeding of improved strains.}, }
@article {pmid39819730, year = {2025}, author = {Liu, X and Tang, Y and Chen, H and Liu, JX and Sun, HZ}, title = {Rumen DNA virome and its relationship with feed efficiency in dairy cows.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {14}, pmid = {39819730}, issn = {2049-2618}, support = {32322077//National Natural Science Foundation of China/ ; }, mesh = {Animals ; Cattle ; *Rumen/virology/microbiology ; *Virome/genetics ; High-Throughput Nucleotide Sequencing ; Female ; Animal Feed ; *Viruses/classification/genetics/isolation &amp; purification ; Gastrointestinal Microbiome ; DNA, Viral/genetics ; Metagenome ; }, abstract = {BACKGROUND: The rumen harbors a diverse virome that interacts with other microorganisms, playing pivotal roles in modulating metabolic processes within the rumen environment. However, the characterization of rumen viruses remains incomplete, and their association with production traits, such as feed efficiency (FE), has not been documented. In this study, rumen fluid from 30 Chinese Holstein dairy cows was analyzed using next-generation sequencing (NGS) and High-Fidelity (HiFi) sequencing to elucidate the rumen DNA virome profile and uncover potential viral mechanisms influencing FE.<br><br>RESULTS: Integrated NGS and HiFi sequencing enhanced the length, completeness, and resolution of viral operational taxonomic units (vOTUs) compared to NGS. A total of 6,922 vOTUs were identified, including 4,716 lytic and 1,961 temperate vOTUs. At the family level, lytic viruses were predominantly from Siphoviridae (30.35%) and Schitoviridae (23.93%), while temperate viruses were primarily Siphoviridae (67.21%). The study annotated 2,382 auxiliary metabolic genes (AMGs), comprising 1,752 lytic virus-associated AMGs across 51 functional categories and 589 temperate virus-associated AMGs across 29 categories. Additionally, 2,232 vOTU-host metagenome-assembled genome (hMAG) linkages were predicted, with Firmicutes_A (33.60%) and Bacteroidota (33.24%) being the most prevalent host phyla. Significant differences in viral populations were observed between high and low FE groups across multiple taxonomic levels (P&#x2009;<&#x2009;0.05). Two pathways were proposed to explain how rumen viruses might modulate FE: (1) Lytic viruses could lyse beneficial host bacteria linked to favorable cattle phenotypes, such as vOTU1836 targeting Ruminococcaceae, resulting in diminished organic acid production and consequently lower FE; (2) AMG-mediated host metabolism modulation, exemplified by GT2 carried by vOTU0897, which may enhance Lachnospiraceae fermentation capacity, increasing organic acid production and thereby improving FE.<br><br>CONCLUSIONS: This study constructed a comprehensive rumen DNA virome profile for Holstein dairy cows, elucidating the structural and functional complexity of rumen viruses, the roles of AMGs, and vOTU-hMAG linkages. The integration of these data offers novel insights into the mechanisms by which rumen viruses may regulate nutrient utilization, potentially influencing FE in dairy cows. Video Abstract.}, }
@article {pmid39819379, year = {2025}, author = {Terzin, M and Robbins, SJ and Bell, SC and Lê Cao, KA and Gruber, RK and Frade, PR and Webster, NS and Yeoh, YK and Bourne, DG and Laffy, PW}, title = {Gene content of seawater microbes is a strong predictor of water chemistry across the Great Barrier Reef.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {11}, pmid = {39819379}, issn = {2049-2618}, mesh = {*Seawater/microbiology/chemistry ; *Coral Reefs ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota/genetics ; Metagenomics/methods ; *Archaea/genetics/classification/isolation &amp; purification ; Water Microbiology ; Salinity ; }, abstract = {BACKGROUND: Seawater microbes (bacteria and archaea) play essential roles in coral reefs by facilitating nutrient cycling, energy transfer, and overall reef ecosystem functioning. However, environmental disturbances such as degraded water quality and marine heatwaves, can impact these vital functions as seawater microbial communities experience notable shifts in composition and function when exposed to stressors. This sensitivity highlights the potential of seawater microbes to be used as indicators of reef health. Microbial indicator analysis has centered around measuring the taxonomic composition of seawater microbial communities, but this can obscure heterogeneity of gene content between taxonomically similar microbes, and thus, microbial functional genes have been hypothesized to have more scope for predictive potential, though empirical validation for this hypothesis is still pending. Using a metagenomics study framework, we establish a functional baseline of seawater microbiomes across offshore Great Barrier Reef (GBR) sites to compare the diagnostic value between taxonomic and functional information in inferring continuous physico-chemical metrics in the surrounding reef.<br><br>RESULTS: Integrating gene-centric metagenomics analyses with 17 physico-chemical variables (temperature, salinity, and particulate and dissolved nutrients) across 48 reefs revealed that associations between microbial functions and environmental parameters were twice as stable compared to taxonomy-environment associations. Distinct seasonal variations in surface water chemistry were observed, with nutrient concentrations up to threefold higher during austral summer, explained by enhanced production of particulate organic matter (POM) by photoautotrophic picocyanobacteria, primarily Synechococcus. In contrast, nutrient levels were lower in winter, and POM production was also attributed to Prochlorococcus. Additionally, heterotrophic microbes (e.g., Rhodospirillaceae, Burkholderiaceae, Flavobacteriaceae, and Rhodobacteraceae) were enriched in reefs with elevated dissolved organic carbon (DOC) and phytoplankton-derived POM, encoding functional genes related to membrane transport, sugar utilization, and energy metabolism. These microbes likely contribute to the coral reef microbial loop by capturing and recycling nutrients derived from Synechococcus and Prochlorococcus, ultimately transferring nutrients from picocyanobacterial primary producers to higher trophic levels.<br><br>CONCLUSION: This study reveals that functional information in reef-associated seawater microbes more&#xa0;robustly associates with physico-chemical variables than taxonomic data, highlighting the importance of incorporating microbial function in reef monitoring initiatives. Our integrative approach to mine for stable seawater microbial biomarkers can be expanded to include additional continuous metrics of reef health (e.g., benthic cover of corals and macroalgae, fish counts/biomass) and may be applicable to other large-scale reef metagenomics datasets beyond the GBR. Video Abstract.}, }
@article {pmid39814067, year = {2024}, author = {Ji, J and Jung, S}, title = {PredCMB: predicting changes in microbial metabolites based on the gene-metabolite network analysis of shotgun metagenome data.}, journal = {Bioinformatics (Oxford, England)}, volume = {41}, number = {1}, pages = {}, pmid = {39814067}, issn = {1367-4811}, support = {//National Research Foundation of Korea/ ; 2022R1A2C1007345//Korea government/ ; }, mesh = {*Metagenome ; *Metagenomics/methods ; Humans ; *Metabolomics/methods ; *Metabolic Networks and Pathways ; *Metabolome ; *Microbiota ; Computational Biology/methods ; *Software ; }, abstract = {MOTIVATION: Microbiota-derived metabolites significantly impact host biology, prompting extensive research on metabolic shifts linked to the microbiota. Recent studies have explored both direct metabolite analyses and computational tools for inferring metabolic functions from microbial shotgun metagenome data. However, no existing tool specifically focuses on predicting changes in individual metabolite levels, as opposed to metabolic pathway activities, based on shotgun metagenome data. Understanding these changes is crucial for directly estimating the metabolic potential associated with microbial genomic content.<br><br>RESULTS: We introduce Predicting Changes in Microbial metaBolites (PredCMB), a novel method designed to predict alterations in individual metabolites between conditions using shotgun metagenome data and enzymatic gene-metabolite networks. PredCMB evaluates differential enzymatic gene abundance between conditions and estimates its influence on metabolite changes. To validate this approach, we applied it to two publicly available datasets comprising paired shotgun metagenomics and metabolomics data from inflammatory bowel disease cohorts and the cohort of gastrectomy for gastric cancer. Benchmark evaluations revealed that PredCMB outperformed a previous method by demonstrating higher correlations between predicted metabolite changes and experimentally measured changes. Notably, it identified metabolite classes exhibiting major alterations between conditions. By enabling the prediction of metabolite changes directly from shotgun metagenome data, PredCMB provides deeper insights into microbial metabolic dynamics than existing methods focused on pathway activity evaluation. Its potential applications include refining target metabolite selection in microbial metabolomic studies and assessing the contributions of microbial metabolites to disease pathogenesis.<br><br>Freely available to non-commercial users at https://www.sysbiolab.org/predcmb.}, }
@article {pmid39813926, year = {2025}, author = {Qu, C and Tang, J and Liu, J and Wang, W and Song, F and Cheng, S and Tang, X and Tang, CJ}, title = {Quorum sensing-enhanced electron transfer in anammox consortia: A mechanism for improved resistance to variable-valence heavy metals.}, journal = {Journal of hazardous materials}, volume = {487}, number = {}, pages = {137130}, doi = {10.1016/j.jhazmat.2025.137130}, pmid = {39813926}, issn = {1873-3336}, mesh = {*Quorum Sensing ; Electron Transport ; *Metals, Heavy/toxicity ; Acyl-Butyrolactones/metabolism ; *Chromium/toxicity ; Bacteria/metabolism/genetics/drug effects ; *Microbial Consortia ; }, abstract = {Quorum sensing (QS) is recognized for enhancing bacterial resistance against heavy metals by regulating the production of extracellular substances that hinder metal penetration into the intracellular environment. However, it remains unclear whether QS contributes to resistance by regulating electron transfer, thereby transforming metals from more toxic to less toxic forms. This study investigated the regulatory mechanism of acyl-homoserine lactone (AHL)-mediated QS on electron transfer under As(III) and Cr(VI) stress. Metagenomic binning results revealed that Candidatus Brocadia sinica serves as a major contributor to AHL production for regulating heavy metal resistance, while other symbiotic bacteria offer complementary resistance pathways. In these bacteria, the AHL synthesis gene htdS plays a pivotal role in QS regulation of electron transfer and heavy metal resistance. Experimental findings demonstrated that AHL increased the electron transport system activity by 19.8 %, and upregulated electron transfer gene expression by 1.1- to 6.9-fold. The enhanced electron transfer facilitated a 28.7 % increase in the transformation of As(III) to less toxic As(V) and monomethylarsonic acid, ultimately achieving efficient nitrogen removal under As(III) stress. This study expands our understanding of how QS strengthens bacterial resistance to heavy metals, offering novel strategies for enhancing nitrogen removal of anammox in heavy metal-contaminated environments.}, }
@article {pmid39813598, year = {2025}, author = {Ren, M and Xia, Y and Pan, H and Zhou, X and Yu, M and Ji, F}, title = {Duodenal-jejunal bypass ameliorates MASLD in rats by regulating gut microbiota and bile acid metabolism through FXR pathways.}, journal = {Hepatology communications}, volume = {9}, number = {2}, pages = {}, pmid = {39813598}, issn = {2471-254X}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; Rats ; *Bile Acids and Salts/metabolism ; *Duodenum/surgery ; Male ; *Receptors, Cytoplasmic and Nuclear/metabolism ; *Jejunum/surgery ; Fecal Microbiota Transplantation ; Rats, Sprague-Dawley ; Disease Models, Animal ; Diet, High-Fat/adverse effects ; Insulin Resistance ; *Fatty Liver/metabolism/surgery ; *Bariatric Surgery/methods ; }, abstract = {BACKGROUND: Although bariatric and metabolic surgical methods, including duodenal-jejunal bypass (DJB), were shown to improve metabolic dysfunction-associated steatotic liver disease (MASLD) in clinical trials and experimental rodent models, their underlying mechanisms remain unclear. The present study therefore evaluated the therapeutic effects and mechanisms of action of DJB in rats with MASLD.<br><br>METHODS: Rats with MASLD were randomly assigned to undergo DJB or sham surgery. Rats were orally administered a broad-spectrum antibiotic cocktail (Abx) or underwent fecal microbiota transplantation to assess the role of gut microbiota in DJB-induced improvement of MASLD. Gut microbiota were profiled by 16S rRNA gene sequencing and metagenomic sequencing, and bile acids (BAs) were analyzed by BA-targeted metabolomics.<br><br>RESULTS: DJB alleviated hepatic steatosis and insulin resistance in rats with diet-induced MASLD. Abx depletion of bacteria abrogated the ameliorating effects of DJB on MASLD. Fecal microbiota transplantation from rats that underwent DJB improved MASLD in high-fat diet-fed recipients by reshaping the gut microbiota, especially by significantly reducing the abundance of Clostridium. This, in turn, suppressed secondary BA biosynthesis and activated the hepatic BA receptor, farnesoid X receptor. Inhibition of farnesoid X receptor attenuated the ameliorative effects of post-DJB microbiota on MASLD.<br><br>CONCLUSIONS: DJB ameliorates MASLD by regulating gut microbiota and BA metabolism through hepatic farnesoid X receptor pathways.}, }
@article {pmid39812347, year = {2025}, author = {Gustafson, KL and Rodriguez, TR and McAdams, ZL and Coghill, LM and Ericsson, AC and Franklin, CL}, title = {Failure of colonization following gut microbiota transfer exacerbates DSS-induced colitis.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2447815}, pmid = {39812347}, issn = {1949-0984}, support = {T32 GM008396/GM/NIGMS NIH HHS/United States ; T32 OD011126/OD/NIH HHS/United States ; U42 OD010918/OD/NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Dextran Sulfate/adverse effects ; *Colitis/chemically induced/microbiology/pathology ; Mice ; Disease Models, Animal ; Mice, Inbred C57BL ; Fecal Microbiota Transplantation ; Feces/microbiology ; Bacteria/classification/genetics/isolation &amp; purification/growth &amp; development ; Female ; Embryo Transfer ; Specific Pathogen-Free Organisms ; Male ; }, abstract = {To study the impact of differing specific pathogen-free gut microbiomes (GMs) on a murine model of inflammatory bowel disease, selected GMs were transferred using embryo transfer (ET), cross-fostering (CF), and co-housing (CH). Prior work showed that the GM transfer method and the microbial composition of donor and recipient GMs can influence microbial colonization and disease phenotypes in dextran sodium sulfate-induced colitis. When a low richness GM was transferred to a recipient with a high richness GM via CH, the donor GM failed to successfully colonize, and a more severe disease phenotype resulted when compared to ET or CF, where colonization was successful. By comparing CH and gastric gavage for fecal material transfer, we isolated the microbial component of this effect and determined that differences in disease severity and survival were associated with microbial factors rather than the transfer method itself. Mice receiving a low richness GM via CH and gastric gavage exhibited greater disease severity and higher expression of pro-inflammatory immune mediators compared to those receiving a high richness GM. This study provides valuable insights into the role of GM composition and colonization in disease modulation.}, }
@article {pmid39810263, year = {2025}, author = {Nychas, E and Marfil-Sánchez, A and Chen, X and Mirhakkak, M and Li, H and Jia, W and Xu, A and Nielsen, HB and Nieuwdorp, M and Loomba, R and Ni, Y and Panagiotou, G}, title = {Discovery of robust and highly specific microbiome signatures of non-alcoholic fatty liver disease.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {10}, pmid = {39810263}, issn = {2049-2618}, mesh = {*Non-alcoholic Fatty Liver Disease/microbiology ; Humans ; *Gastrointestinal Microbiome/genetics ; Male ; Metagenomics/methods ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Middle Aged ; Adult ; Machine Learning ; Obesity/microbiology ; }, abstract = {BACKGROUND: The pathogenesis of non-alcoholic fatty liver disease (NAFLD) with a global prevalence of 30% is multifactorial and the involvement of gut bacteria has been recently proposed. However, finding robust bacterial signatures of NAFLD has been a great challenge, mainly due to its co-occurrence with other metabolic diseases.<br><br>RESULTS: Here, we collected public metagenomic data and integrated the taxonomy profiles with in silico generated community metabolic outputs, and detailed clinical data, of 1206 Chinese subjects w/wo metabolic diseases, including NAFLD (obese and lean), obesity, T2D, hypertension, and atherosclerosis. We identified highly specific microbiome signatures through building accurate machine learning models (accuracy&#x2009;=&#x2009;0.845-0.917) for NAFLD with high portability (generalizable) and low prediction rate (specific) when applied to other metabolic diseases, as well as through a community approach involving differential co-abundance ecological networks. Moreover, using these signatures coupled with further mediation analysis and metabolic dependency modeling, we propose synergistic defined microbial consortia associated with NAFLD phenotype in overweight and lean individuals, respectively.<br><br>CONCLUSION: Our study reveals robust and highly specific NAFLD signatures and offers a more realistic microbiome-therapeutics approach over individual species for this complex disease. Video Abstract.}, }
@article {pmid39809768, year = {2025}, author = {Fahur Bottino, G and Bonham, KS and Patel, F and McCann, S and Zieff, M and Naspolini, N and Ho, D and Portlock, T and Joos, R and Midani, FS and Schüroff, P and Das, A and Shennon, I and Wilson, BC and O'Sullivan, JM and Britton, RA and Murray, DM and Kiely, ME and Taddei, CR and Beltrão-Braga, PCB and Campos, AC and Polanczyk, GV and Huttenhower, C and Donald, KA and Klepac-Ceraj, V}, title = {Early life microbial succession in the gut follows common patterns in humans across the globe.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {660}, pmid = {39809768}, issn = {2041-1723}, support = {/WT_/Wellcome Trust/United Kingdom ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Infant ; Male ; Female ; Feces/microbiology ; Metagenome ; Bifidobacterium/genetics/isolation &amp; purification ; Infant, Newborn ; Bacteria/classification/genetics/isolation &amp; purification ; Child, Preschool ; Faecalibacterium prausnitzii/genetics/isolation &amp; purification ; Child Development ; }, abstract = {Characterizing the dynamics of microbial community succession in the infant gut microbiome is crucial for understanding child health and development, but no normative model currently exists. Here, we estimate child age using gut microbial taxonomic relative abundances from metagenomes, with high temporal resolution (±3 months) for the first 1.5 years of life. Using 3154 samples from 1827 infants across 12 countries, we trained a random forest model, achieving a root mean square error of 2.56 months. We identified key taxonomic predictors of age, including declines in Bifidobacterium spp. and increases in Faecalibacterium prausnitzii and Lachnospiraceae. Microbial succession patterns are conserved across infants from diverse human populations, suggesting universal developmental trajectories. Functional analysis confirmed trends in key microbial genes involved in feeding transitions and dietary exposures. This model provides a normative benchmark of "microbiome age" for assessing early gut maturation that may be used alongside other measures of child development.}, }
@article {pmid39809763, year = {2025}, author = {Armetta, J and Li, SS and Vaaben, TH and Vazquez-Uribe, R and Sommer, MOA}, title = {Metagenome-guided culturomics for the targeted enrichment of gut microbes.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {663}, pmid = {39809763}, issn = {2041-1723}, support = {NNF20CC0035580//Novo Nordisk Fonden (Novo Nordisk Foundation)/ ; NNF17CO0028232//Novo Nordisk Fonden (Novo Nordisk Foundation)/ ; grant agreement No. 813781//EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)/ ; no. ALTF 137-2018//European Molecular Biology Organization (EMBO)/ ; no. GNT1166180//Department of Health | National Health and Medical Research Council (NHMRC)/ ; }, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; *Metagenome/genetics ; Phylogeny ; *Bacteria/genetics/classification/isolation &amp; purification/growth &amp; development ; Culture Media/chemistry ; *Metagenomics/methods ; Feces/microbiology ; High-Throughput Nucleotide Sequencing ; }, abstract = {The gut microbiome significantly impacts human health, yet cultivation challenges hinder its exploration. Here, we combine deep whole-metagenome sequencing with culturomics to selectively enrich for taxa and functional capabilities of interest. Using a modified commercial base medium, 50 growth modifications were evaluated, spanning antibiotics, physico-chemical conditions, and bioactive compounds. Whole-metagenome sequencing identified medium additives, like caffeine, that enhance taxa often associated with healthier subjects (e.g., Lachnospiraceae, Oscillospiraceae, Ruminococcaceae). We also explore the impact of modifications on the composition of cultured communities and establish a link between medium preference and microbial phylogeny. Leveraging these insights, we demonstrate that combinations of media modifications can further enhance the targeted enrichment of taxa and metabolic functions, such as Collinsella aerofaciens, or strains harboring biochemical pathways involved in dopamine metabolism. This streamlined, scalable approach unlocks the potential for selective enrichment, advancing microbiome research by understanding the impact of different cultivation parameters on gut microbes.}, }
@article {pmid39809266, year = {2025}, author = {Wang, D and Jiang, Y and Jiang, J and Pan, Y and Yang, Y and Fang, X and Liang, L and Li, H and Dong, Z and Fan, S and Ma, D and Zhang, XS and Li, H and He, Y and Li, N}, title = {Gut microbial GABA imbalance emerges as a metabolic signature in mild autism spectrum disorder linked to overrepresented Escherichia.}, journal = {Cell reports. Medicine}, volume = {6}, number = {1}, pages = {101919}, pmid = {39809266}, issn = {2666-3791}, mesh = {*Autism Spectrum Disorder/microbiology/metabolism ; *Gastrointestinal Microbiome ; Humans ; *gamma-Aminobutyric Acid/metabolism ; Male ; Female ; Animals ; Child ; Mice ; Glutamic Acid/metabolism ; *Escherichia coli ; RNA, Ribosomal, 16S/genetics ; Child, Preschool ; Feces/microbiology ; Adolescent ; Metabolomics/methods ; Metabolome ; }, abstract = {Gut microbiota (GM) alterations have been implicated in autism spectrum disorder (ASD), yet the specific functional architecture remains elusive. Here, employing multi-omics approaches, we investigate stool samples from two distinct cohorts comprising 203 children with mild ASD or typical development. In our screening cohort, regression-based analysis for metabolomic profiling identifies an elevated γ-aminobutyric acid (GABA) to glutamate (Glu) ratio as a metabolic signature of ASD, independent of age and gender. In the validating cohort, we affirm the GABA/Glu ratio as an ASD diagnostic indicator after adjusting for geography, age, gender, and specific food-consuming frequency. Integrated analysis of metabolomics, 16S rRNA sequencing, and metagenomics reveals a correlation between overrepresented Escherichia and disrupted GABA metabolism. Furthermore, we observe social behavioral impairments in weaning mice transplanted with E. coli, suggesting a potential link to ASD symptomatology. Collectively, these findings provide insights into potential diagnostic and therapeutic strategies aimed at evaluating and restoring gut microbial neurotransmitter homeostasis.}, }
@article {pmid39807898, year = {2025}, author = {Forry, SP and Servetas, SL and Dootz, JN and Hunter, ME and Kralj, JG and Filliben, JJ and Jackson, SA}, title = {A sensitivity analysis of methodological variables associated with microbiome measurements.}, journal = {Microbiology spectrum}, volume = {13}, number = {2}, pages = {e0069624}, pmid = {39807898}, issn = {2165-0497}, mesh = {*Metagenomics/methods/standards ; Humans ; Feces/microbiology ; *Microbiota/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Gastrointestinal Microbiome ; }, abstract = {The experimental methods employed during metagenomic sequencing analyses of microbiome samples significantly impact the resulting data and typically vary substantially between laboratories. In this study, a full factorial experimental design was used to compare the effects of a select set of methodological choices (sample, operator, lot, extraction kit, variable region, and reference database) on the analysis of biologically diverse stool samples. For each parameter investigated, a main effect was calculated that allowed direct comparison both between methodological choices (bias effects) and between samples (real biological differences). Overall, methodological bias was found to be similar in magnitude to real biological differences while also exhibiting significant variations between individual taxa, even between closely related genera. The quantified method biases were then used to computationally improve the comparability of data sets collected under substantially different protocols. This investigation demonstrates a framework for quantitatively assessing methodological choices that could be routinely performed by individual laboratories to better understand their metagenomic sequencing workflows and to improve the scope of the datasets they produce.IMPORTANCEMethod-specific bias is a well-recognized challenge in metagenomic sequencing characterization of microbiome samples, but rigorous bias quantification is challenging. This report details a full factorial exploration of 48 experimental protocols by systematically varying microbiome sample, iterations of material production, laboratory personnel, DNA extraction kit, marker gene selection, and reference databases. Quantification of the biases associated with each parameter revealed similar magnitudes of variation arising from real biological differences and from varied analysis procedures. Furthermore, these measurement biases varied substantially with taxa, even between closely related genera. However, computational correction of method bias using a reference material was demonstrated that significantly harmonized metagenomic sequencing results collected using different analysis protocols.}, }
@article {pmid39807869, year = {2025}, author = {Sáenz, JS and Rios-Galicia, B and Seifert, J}, title = {Antiviral defense systems in the rumen microbiome.}, journal = {mSystems}, volume = {10}, number = {2}, pages = {e0152124}, pmid = {39807869}, issn = {2379-5077}, support = {327953272 (SE2059/3-1)//Deutsche Forschungsgemeinschaft (DFG)/ ; 202989534 (SE2059/2-2)//Deutsche Forschungsgemeinschaft (DFG)/ ; }, mesh = {*Rumen/microbiology/virology ; Animals ; *Bacteriophages/genetics/physiology ; Archaea/genetics/virology ; *Bacteria/genetics/virology ; *Microbiota ; *Gastrointestinal Microbiome ; Genome, Bacterial ; Host Microbial Interactions ; }, abstract = {The continuous interaction between phages and their respective hosts has resulted in the evolution of multiple bacterial immune mechanisms. However, the diversity and prevalence of antiviral defense systems in complex communities are still unknown. We therefore investigated the diversity and abundance of viral defense systems in 3,038 high-quality bacterial and archaeal genomes from the rumen. In total, 14,241 defense systems and 31,948 antiviral-related genes were identified. Those genes represented 114 unique system types grouped into 49 families. We observed a high prevalence of defense systems in the genomes. However, the number of defense systems, defense system families, and system density varied widely from genome to genome. Additionally, the number of defense system per genome correlated positively with the number of defense system families and the genome size. Restriction modification, Abi, and cas system families were the most common, but many rare systems were present in only 1% of the genomes. Antiviral defense systems are prevalent and diverse in the rumen, but only a few are dominant, indicating that most systems are rarely present. However, the collection of systems throughout the rumen may represent a pool of mechanisms that can be shared by different members of the community and modulate the phage-host interaction.IMPORTANCEPhages may act antagonistically at the cell level but have a mutualistic interaction at the microbiome level. This interaction shapes the structure of microbial communities and is mainly driven by the defense mechanism. However, the diversity of such mechanism is larger than previously thought. Because of that, we described the abundance and diversity of the antiviral defense system of a collection of genomes, metagenome-assembled genomes (MAGs) and isolates, from the rumen. While defense mechanisms seem to be prevalent among bacteria and archaea, only a few were common. This suggests that most of these defense mechanisms are not present in many rumen microbes but could be shared among different members of the microbial community. This is consistent with the "pan-immune system" model, which appears to be common across different environments.}, }
@article {pmid39807864, year = {2025}, author = {Nakatsu, G and Ko, D and Michaud, M and Franzosa, EA and Morgan, XC and Huttenhower, C and Garrett, WS}, title = {Virulence factor discovery identifies associations between the Fic gene family and Fap2[+] fusobacteria in colorectal cancer microbiomes.}, journal = {mBio}, volume = {16}, number = {2}, pages = {e0373224}, pmid = {39807864}, issn = {2150-7511}, support = {R01 CA154426/CA/NCI NIH HHS/United States ; //Cancer Research UK (CRUK)/ ; R01CA154426//HHS | NIH | National Cancer Institute (NCI)/ ; }, mesh = {Humans ; *Virulence Factors/genetics ; *Colorectal Neoplasms/microbiology ; *Fusobacterium/genetics/pathogenicity/isolation &amp; purification ; *Gastrointestinal Microbiome ; *Lectins/genetics/metabolism ; Genome, Bacterial ; Multigene Family ; *Fusobacteria/genetics/pathogenicity ; Feces/microbiology ; *Bacterial Proteins/genetics/metabolism ; }, abstract = {Fusobacterium is a bacterium associated with colorectal cancer (CRC) tumorigenesis, progression, and metastasis. Fap2 is a fusobacteria-specific outer membrane galactose-binding lectin that mediates Fusobacterium adherence to and invasion of CRC tumors. Advances in omics analyses provide an opportunity to profile and identify microbial genomic features that correlate with the cancer-associated bacterial virulence factor Fap2. Here, we analyze genomes of Fusobacterium colon tumor isolates and find that a family of post-translational modification enzymes containing Fic domains is associated with Fap2 positivity in these strains. We demonstrate that Fic family genes expand with the presence of Fap2 in the fusobacterial pangenome. Through comparative genomic analysis, we find that Fap2[+] Fusobacteriota are highly enriched with Fic gene families compared to other cancer-associated and human gut microbiome bacterial taxa. Using a global data set of CRC shotgun metagenomes, we show that fusobacterial Fic and Fap2 genes frequently co-occur in the fecal microbiomes of individuals with late-stage CRC. We further characterize specific Fic gene families harbored by Fap2[+] Fusobacterium animalis genomes and detect recombination events and elements of horizontal gene transfer via synteny analysis of Fic gene loci. Exposure of a F. animalis strain to a colon adenocarcinoma cell line increases gene expression of fusobacterial Fic and virulence-associated adhesins. Finally, we demonstrate that Fic proteins are synthesized by F. animalis as Fic peptides are detectable in F. animalis monoculture supernatants. Taken together, our study uncovers Fic genes as potential virulence factors in Fap2[+] fusobacterial genomes.IMPORTANCEAccumulating data support that bacterial members of the intra-tumoral microbiota critically influence colorectal cancer progression. Yet, relatively little is known about non-adhesin fusobacterial virulence factors that may influence carcinogenesis. Our genomic analysis and expression assays in fusobacteria identify Fic domain-containing genes, well-studied virulence factors in pathogenic bacteria, as potential fusobacterial virulence features. The Fic family proteins that we find are encoded by fusobacteria and expressed by Fusobacterium animalis merit future investigation to assess their roles in colorectal cancer development and progression.}, }
@article {pmid39806507, year = {2025}, author = {Zhang, D and Cao, Y and Dai, B and Zhang, T and Jin, X and Lan, Q and Qian, C and He, Y and Jiang, Y}, title = {The virome composition of respiratory tract changes in school-aged children with Mycoplasma pneumoniae infection.}, journal = {Virology journal}, volume = {22}, number = {1}, pages = {10}, pmid = {39806507}, issn = {1743-422X}, support = {No. Q202342//Scientific Research Program of Wuxi Health Commission/ ; No. 32201990//National Natural Science Foundation of China/ ; No. BK20210461//Natural Science Foundation of Jiangsu Province of China/ ; No. SBQN22013//Hospital-level project of Northern Jiangsu People's Hospital/ ; }, mesh = {Humans ; *Virome ; Child ; Male ; Female ; *Pneumonia, Mycoplasma/virology/epidemiology/microbiology ; *Mycoplasma pneumoniae ; *Viruses/genetics/classification/isolation &amp; purification ; Bronchoalveolar Lavage Fluid/virology ; Metagenomics ; COVID-19/epidemiology/virology ; *Respiratory System/virology ; *Respiratory Tract Infections/virology/microbiology ; SARS-CoV-2 ; Pharynx/virology ; Adolescent ; }, abstract = {BACKGROUND: Mycoplasma pneumoniae (MP) is a common pathogen for respiratory infections in children. Previous studies have reported respiratory tract microbial disturbances associated with MP infection (MPI); however, since the COVID-19 pandemic, respiratory virome data in school-aged children with MPI remains insufficient. This study aims to explore the changes in the respiratory virome caused by MPI after the COVID-19 pandemic to enrich local epidemiological data.<br><br>METHODS: Clinical samples from 70 children with MPI (70 throat swab samples and 70 bronchoalveolar lavage fluid (BALF) samples) and 78 healthy controls (78 throat swab samples) were analyzed using viral metagenomics. Virus reads were calculated and normalized using MEGAN.6, followed by statistical analysis.<br><br>RESULTS: Principal Coordinate Analysis (PCoA) showed that viral community diversity is a significant difference between disease cohorts and healthy controls. After MPI, the number of virus species in the upper respiratory tract (URT) increased obviously, and the abundance of families Poxviridae, Retroviridae, and Iridoviridae, which infect vertebrates, rose evidently, particularly the species BeAn 58,085 virus (BAV). Meanwhile, phage alterations in the disease cohorts were predominantly characterized by increased Myoviridae and Ackermannviridae families and decreased Siphoviridae and Salasmaviridae families (p&#x2009;<&#x2009;0.01). In addition, some new viruses, such as rhinovirus, respirovirus, dependoparvovirus, and a novel gemykibvirus, were also detected in the BALF of the disease cohort.<br><br>CONCLUSIONS: This cross-sectional research highlighted the respiratory virome characteristics of school-aged children with MPI after the COVID-19 outbreak and provided important epidemiological information. Further investigation into the impact of various microorganisms on diseases will aid in developing clinical treatment strategies.}, }
@article {pmid39806416, year = {2025}, author = {Chen, L and Ye, Z and Li, J and Wang, L and Chen, Y and Yu, M and Han, J and Huang, J and Li, D and Lv, Y and Xiong, K and Tian, D and Liao, J and Seidler, U and Xiao, F}, title = {Gut bacteria Prevotellaceae related lithocholic acid metabolism promotes colonic inflammation.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {55}, pmid = {39806416}, issn = {1479-5876}, support = {81873556//National Natural Science Foundation of China/ ; 82170546//National Natural Science Foundation of China/ ; CCCF-QF-2022B67-3//China Crohn's &amp; Colitis Foundation/ ; 2023B02//Tongji Hospital Fund/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Lithocholic Acid/metabolism ; *Colitis/microbiology/pathology/metabolism ; Humans ; *Colon/pathology/microbiology ; *Inflammation/pathology/microbiology ; Male ; Dextran Sulfate ; Mice, Inbred C57BL ; Bile Acids and Salts/metabolism ; Mice ; Female ; Feces/microbiology ; Inflammatory Bowel Diseases/microbiology/pathology ; Disease Models, Animal ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: The conversion of primary bile acids to secondary bile acids by the gut microbiota has been implicated in colonic inflammation. This study investigated the role of gut microbiota related bile acid metabolism in colonic inflammation in both patients with inflammatory bowel disease (IBD) and a murine model of dextran sulfate sodium (DSS)-induced colitis.<br><br>METHODS: Bile acids in fecal samples from patients with IBD and DSS-induced colitis mice, with and without antibiotic treatment, were analyzed using ultraperformance liquid chromatography-mass spectrometry (UPLC-MS). The composition of the microbiota in fecal samples from IBD patients and DSS-colitis mice was characterized via Illumina MiSeq sequencing of the bacterial 16S rRNA gene V3-V4 region. Metagenomic profiling further identified metabolism-related gene signatures in stool samples from DSS-colitis mice. Histological analysis, quantitative PCR (qPCR) and Western Blotting were conducted on colonic samples from DSS-induced colitis mice to assess colonic inflammation, mucosal barrier integrity, and associated signaling pathways. The multivariate analysis of bile acids was conducted using Soft Independent Modelling of Class Analogy (SIMCA, Umetrics, Sweden). The relation between the relative abundance of specific phyla/genera and bile acid concentration was assess through Spearman's correlation analyses. Finally, lithocholic acid (LCA), the key bile acid, was administered via gavage to evaluate its effect on colonic inflammation and mucosal barrier integrity.<br><br>RESULTS: In patients with IBD, the composition of colonic bile acids and gut microbiota was altered. Moreover, changes in the gut microbiota further modulate the composition of bile acids in the intestine. As the gut microbiota continues to shift, the bile acid profile undergoes additional alterations. The aforementioned alterations were also observed in mice with DSS-induced colitis. The study revealed a correlation between dysbiosis of the gut microbiota and modifications in the profile of colonic bile acids, notably LCA observed in both patients with IBD and mice with DSS-induced colitis. Through multivariate analysis, LCA was identified as the key bile acid that significantly affects colonic inflammation and the integrity of mucosal barrier. Subsequent experiments confirmed that LCA supplementation effectively mitigated the inhibitory effects of gut microbiota on colitis progression in mice, primarily through the activation of the sphingosine-1-phosphate receptor 2 (S1PR2)/NF-&#x3ba;B p65 signaling pathway. Analysis of the microbiome and metagenomic data revealed changes in the gut microbiota, notably an increased abundance of an unclassified genus within the family Prevotellaceae in DSS-induced colitis mice. Furthermore, a positive correlation was observed between the relative abundance of Prevotellaceae and bile acid biosynthesis pathways, as well as colonic LCA level.<br><br>CONCLUSIONS: These findings suggest that LCA and its positively correlated gut bacteria, Prevotellaceae, are closely associated with intestinal inflammation. Targeting colonic inflammation may involve inhibiting LCA and members of the Prevotellaceae family as potential therapeutic strategies.}, }
@article {pmid39806046, year = {2025}, author = {Sun, L and Liu, X and Zhou, L and Wang, H and Lian, C and Zhong, Z and Wang, M and Chen, H and Li, C}, title = {Shallow-water mussels (Mytilus galloprovincialis) adapt to deep-sea environment through transcriptomic and metagenomic insights.}, journal = {Communications biology}, volume = {8}, number = {1}, pages = {46}, pmid = {39806046}, issn = {2399-3642}, support = {42276153, 42106134, 42106100, 42030407//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Animals ; *Mytilus/microbiology/genetics/physiology ; *Transcriptome ; Microbiota ; Metagenomics ; *Adaptation, Physiological/genetics ; Symbiosis ; Oceans and Seas ; China ; }, abstract = {Recent studies have unveiled the deep sea as a rich biosphere, populated by species descended from shallow-water ancestors post-mass extinctions. Research on genomic evolution and microbial symbiosis has shed light on how these species thrive in extreme deep-sea conditions. However, early adaptation stages, particularly the roles of conserved genes and symbiotic microbes, remain inadequately understood. This study examined transcriptomic and microbiome changes in shallow-water mussels Mytilus galloprovincialis exposed to deep-sea conditions at the Site-F cold seep in the South China Sea. Results reveal complex gene expression adjustments in stress response, immune defense, homeostasis, and energy metabolism pathways during adaptation. After 10 days of deep-sea exposure, shallow-water mussels and their microbial communities closely resembled those of native deep-sea mussels, demonstrating host and microbiome convergence in response to adaptive shifts. Notably, methanotrophic bacteria, key symbionts in native deep-sea mussels, emerged as a dominant group in the exposed mussels. Host genes involved in immune recognition and endocytosis correlated significantly with the abundance of these bacteria. Overall, our analyses provide insights into adaptive transcriptional regulation and microbiome dynamics of mussels in deep-sea environments, highlighting the roles of conserved genes and microbial community shifts in adapting to extreme environments.}, }
@article {pmid39805953, year = {2025}, author = {Daruka, L and Czikkely, MS and Szili, P and Farkas, Z and Balogh, D and Grézal, G and Maharramov, E and Vu, TH and Sipos, L and Juhász, S and Dunai, A and Daraba, A and Számel, M and Sári, T and Stirling, T and Vásárhelyi, BM and Ari, E and Christodoulou, C and Manczinger, M and Enyedi, MZ and Jaksa, G and Kovács, K and van Houte, S and Pursey, E and Pintér, L and Haracska, L and Kintses, B and Papp, B and Pál, C}, title = {ESKAPE pathogens rapidly develop resistance against antibiotics in development in vitro.}, journal = {Nature microbiology}, volume = {10}, number = {2}, pages = {313-331}, pmid = {39805953}, issn = {2058-5276}, mesh = {*Anti-Bacterial Agents/pharmacology ; Humans ; Microbial Sensitivity Tests ; *Drug Resistance, Bacterial/genetics ; Klebsiella pneumoniae/drug effects/genetics ; Pseudomonas aeruginosa/drug effects/genetics ; Acinetobacter baumannii/drug effects/genetics ; Escherichia coli/drug effects/genetics ; *Bacteria/drug effects/genetics ; Mutation ; Gastrointestinal Microbiome/genetics ; Metagenomics ; *Gram-Negative Bacteria/drug effects/genetics ; Drug Resistance, Multiple, Bacterial/genetics ; }, abstract = {Despite ongoing antibiotic development, evolution of resistance may render candidate antibiotics ineffective. Here we studied in vitro emergence of resistance to 13 antibiotics introduced after 2017 or currently in development, compared with in-use antibiotics. Laboratory evolution showed that clinically relevant resistance arises within 60 days of antibiotic exposure in Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa, priority Gram-negative ESKAPE pathogens. Resistance mutations are already present in natural populations of pathogens, indicating that resistance in nature can emerge through selection of pre-existing bacterial variants. Functional metagenomics showed that mobile resistance genes to antibiotic candidates are prevalent in clinical bacterial isolates, soil and human gut microbiomes. Overall, antibiotic candidates show similar susceptibility to resistance development as antibiotics currently in use, and the corresponding resistance mechanisms overlap. However, certain combinations of antibiotics and bacterial strains were less prone to developing resistance, revealing potential narrow-spectrum antibacterial therapies that could remain effective. Finally, we develop criteria to guide efforts in developing effective antibiotic candidates.}, }
@article {pmid39805403, year = {2025}, author = {Wolf, PG and Welsh, C and Binion, B and Dai, H and Oliveira, ML and Hamm, A and Goldberg, S and Buobu, PS and Schering, T and Vergis, S and Kessee, N and Gomez, SL and Yazici, C and Maienschein-Cline, M and Byrd, DA and Gaskins, HR and Ridlon, JM and Mutlu, E and Greening, C and Tussing-Humphreys, L}, title = {Secondary Bile Acid Derivatives Are Contributors to the Fecal Bile Acid Pool and Associated With Bile Acid-Modulating Nutrients.}, journal = {The Journal of nutrition}, volume = {155}, number = {3}, pages = {826-838}, pmid = {39805403}, issn = {1541-6100}, mesh = {Humans ; Middle Aged ; Male ; Aged ; *Bile Acids and Salts/metabolism/chemistry/blood ; Female ; *Feces/chemistry ; Diet ; Gastrointestinal Microbiome ; *Nutrients ; }, abstract = {BACKGROUND: Accumulation of hydrophobic bile acids (BAs) is linked with cancer development. However, derivatives of deoxycholic acid (DCA) and lithocholic acid (LCA) produced via bacterial metabolism may mitigate the proinflammatory and cytotoxic effects of hydrophobic BAs. The impact of diet on secondary BA derivative production has not been determined.<br><br>OBJECTIVES: This study aimed to study the associations between BA-modulating nutrients and the composition of secondary BAs and their derivatives.<br><br>METHODS: Stool and blood were collected from 138 participants aged 45-75 y that self-identified as Black or non-Hispanic White. BAs were extracted from stool and serum and quantified using LC/ESI-MS/MS. Energy, macronutrients, micronutrients, and specific dietary nutrients were estimated from two 24-h diet recalls. The abundance of genes for microbial BA metabolism was assessed from stool metagenomes. Kendall &#x3c4; correlation and regression-based modeling were performed to determine associations between BA categories, microbial genes, and select energy-adjusted dietary variables (alcohol, calcium, coffee, fiber, fat, and protein).<br><br>RESULTS: Participants had a mean age of 60 y and a mean BMI of 31 kg/m[2]. BA derivatives were present in all participant stools, with lagodeoxycholic acid being the most abundant derivative quantified. Analysis of stool microbial metagenomes revealed the presence of genes for secondary BA derivative production in all participants. Protein is positively associated with the accumulation of secondary BAs. monounsaturated fatty acids (MUFA)s were negatively associated with high abundant derivatives of DCA in regression models. Total fiber and coffee intake were positively correlated with increased conversion of BAs to derivatives. Race and smoking status were significant predictors of associations between dietary variables and BA derivatives.<br><br>CONCLUSION: Protein, MUFAs, total fiber and coffee are significantly associated with concentrations of secondary BAs and their derivatives. Future work should account for social and structural influences on dietary intake and its relationship with BA-elicited cancer risk.}, }
@article {pmid39805250, year = {2025}, author = {Bortoluzzi, C and Ghanbari, M and Gonzáles, JC and Bohórquez, JO and Paredes, R and Mauri, Y and Lozano-Poveda, CA}, title = {Precision biotic as an effective replacement of hydrolyzed yeast and butyrate in antibiotic free diets of broiler chickens raised under field conditions.}, journal = {Poultry science}, volume = {104}, number = {2}, pages = {104664}, pmid = {39805250}, issn = {1525-3171}, mesh = {Animals ; *Chickens/growth &amp; development/microbiology/physiology ; Animal Feed/analysis ; *Gastrointestinal Microbiome/drug effects ; Diet/veterinary ; Animal Nutritional Physiological Phenomena/drug effects ; *Yeast, Dried/administration &amp; dosage/metabolism ; Dietary Supplements/analysis ; Cecum/microbiology ; *Animal Husbandry/methods ; *Butyrates/administration &amp; dosage/metabolism ; Random Allocation ; Male ; Housing, Animal ; Anti-Bacterial Agents ; }, abstract = {A total of 1,436,000 Ross 380 AP broiler chicks were included in the experiment, which was conducted in two cycles with 20 houses per cycle and 35,900 birds per house. The objective was to evaluate, under field conditions, the impact of a precision biotic (PB) on the growth performance and cecal microbiome of broiler chickens, in comparison to enzymatically hydrolyzed yeast (EHY) and butyrate (BT) in an antibiotic-free diet. Each cycle consisted of six (6) houses under PB supplementation, and 14 houses under the regular dietary program used by the integration. Body weight (BW), feed intake (FI), and feed conversion ratio (FCR) were assessed at processing age, ranging from 39 to 45 d. Birds had ad libitum access to water and feed. On day 29, cecal content from 7 birds per house (42 birds per treatment) were collected for microbiome analysis by applying shotgun metagenomics approach. The performance data were analyzed by ANCOVA, house was considered as the experimental unit for growth performance (n = 20; P < 0.05), and the bird for microbiome analysis (n = 84; P < 0.05). Both treatment groups performed below the strain target in terms of BW, but better in terms of FCR. There were no significant differences (P > 0.05) between both groups on the growth performance, indicating that PB effectively replaced EHY and BT without compromising growth. However, significant functional changes were observed in the microbiome of birds fed PB, with enrichment in the pathways related to carbon and nitrogen metabolism. These changes were associated with an increased carbon metabolism index (P = 0.05), which can lead to higher endogenous short-chain fatty acids (SCFAs) production. Overall, by potentially increasing SCFA production by the intestinal microbiome, PB supported the growth performance of chickens similar to that achieved with EHY and BT.}, }
@article {pmid39805166, year = {2025}, author = {Memon, FU and Zhu, Y and Cui, Y and Feng, X and Ahmad, S and Zeng, P and Nabi, F and Hao, D and Huang, Z and Tettamanti, G and Tian, L}, title = {Gut microbial communities and transcriptional profiles of black soldier fly (Hermitia illucens) larvae fed on fermented sericulture waste.}, journal = {Waste management (New York, N.Y.)}, volume = {194}, number = {}, pages = {158-168}, doi = {10.1016/j.wasman.2025.01.011}, pmid = {39805166}, issn = {1879-2456}, mesh = {Animals ; Larva/microbiology ; *Gastrointestinal Microbiome ; Fermentation ; *Diptera/microbiology ; Transcriptome ; Animal Feed ; *Waste Management/methods ; }, abstract = {Sericulture waste poses significant challenges to industrial and environmental safety. Black soldier fly larvae (BSFL) offer a promising solution for organic waste management by converting it into insect protein. This study aimed to develop a microbial fermented method for utilizing sericulture waste to feed BSFL and explore the underlying mechanisms. Our results showed that all fermented sericulture waste groups had positive effects on body weight, survival rate, substrate consumption rate, and substrate conversion rate. Metagenomic analysis revealed a notable increase in the abundances of commensal genera, including Sedimentibacter, Clostridium, Enterococcus, Bacteroides, and Bacillus, in the gut of BSFL fed on sericulture waste fermented with the most effective combination of microbial strains (B. subtilis, B. licheniformis, and E. faecalis). In contrast, BSFL reared on unfermented sericulture waste exhibited higher abundances of potentially pathogenic and harmful genera, including Providencia, Klebsiella, Escherichia, Brucella, and Enterobacter. Clusters of orthologous genes (COG) analysis indicated that altered microbial communities in the fermented group mainly participated in metabolic pathways, defense mechanism, and signal transduction mechanism. Transcriptome analysis further revealed that the upregulated genes were functionally associated with key metabolic pathways and immune mechanisms in the fermented group. These findings underscore the pivotal role of selected microbial fermentation in utilizing sericulture waste as BSFL feed, providing a sustainable solution for organic waste management.}, }
@article {pmid39804694, year = {2025}, author = {Puller, V and Plaza Oñate, F and Prifti, E and de Lahondès, R}, title = {Impact of simulation and reference catalogues on the evaluation of taxonomic profiling pipelines.}, journal = {Microbial genomics}, volume = {11}, number = {1}, pages = {}, pmid = {39804694}, issn = {2057-5858}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; Computer Simulation ; *Metagenomics/methods ; Microbiota/genetics ; *Bacteria/classification/genetics ; Computational Biology/methods ; Benchmarking ; }, abstract = {Microbiome profiling tools rely on reference catalogues, which significantly affect their performance. Comparing them is, however, challenging, mainly due to differences in their native catalogues. In this study, we present a novel standardized benchmarking framework that makes such comparisons more accurate. We decided not to customize databases but to translate results to a common reference to use the tools with their native environment. Specifically, we conducted two realistic simulations of gut microbiome samples, each based on a specific taxonomic profiler, and used two different taxonomic references to project their results, namely the Genome Taxonomy Database and the Unified Human Gastrointestinal Genome. To demonstrate the importance of using such a framework, we evaluated four established profilers as well as the impact of the simulations and that of the common taxonomic references on the perceived performance of these profilers. Finally, we provide guidelines to enhance future profiler comparisons for human microbiome ecosystems: (i) use or create realistic simulations tailored to your biological context (BC), (ii) identify a common feature space suited to your BC and independent of the catalogues used by the profilers and (iii) apply a comprehensive set of metrics covering accuracy (sensitivity/precision), overall representativity (richness/Shannon) and quantification (UniFrac and/or Aitchison distance).}, }
@article {pmid39804518, year = {2025}, author = {Claytor, JD and Lin, DL and Magnaye, KM and Guerrero, YS and Langelier, CR and Lynch, SV and El-Nachef, N}, title = {Effect of Fecal Microbiota Transplant on Antibiotic Resistance Genes Among Patients with Chronic Pouchitis.}, journal = {Digestive diseases and sciences}, volume = {70}, number = {3}, pages = {982-990}, pmid = {39804518}, issn = {1573-2568}, mesh = {Humans ; *Pouchitis/therapy/microbiology ; *Fecal Microbiota Transplantation/methods ; Male ; Female ; Adult ; Middle Aged ; Chronic Disease ; Anti-Bacterial Agents/therapeutic use ; *Gastrointestinal Microbiome ; Colitis, Ulcerative/surgery ; Feces/microbiology ; *Drug Resistance, Microbial/genetics ; }, abstract = {BACKGROUND: Pouchitis is common among patients with ulcerative colitis (UC) who have had colectomy with ileal pouch-anal anastomosis. Antibiotics are first-line therapy for pouch inflammation, increasing the potential for gut colonization with multi-drug resistant organisms (MDRO). Fecal microbial transplant (FMT) is being studied in the treatment of pouchitis and in the eradication of MDRO. Prior work using aerobic antibiotic culture disks suggests that some patients with chronic pouchitis may regain fluoroquinolone sensitivity after FMT. However, gut MDRO include anaerobic, fastidious organisms that are difficult to culture using traditional methods.<br><br>AIM: We aimed to assess whether FMT reduced the abundance of antibiotic resistance genes (ARG) or affected resistome diversity, evenness, or richness in patients with chronic pouchitis.<br><br>METHODS: We collected clinical characteristics regarding infections and antibiotic exposures for 18 patients who had previously been enrolled in an observational study investigating FMT as a treatment for pouchitis. Twenty-six pre- and post-FMT stool samples were analyzed using FLASH (Finding Low Abundance Sequences by Hybridization), a CRISPR/Cas9-based shotgun metagenomic sequence enrichment technique that detects acquired and chromosomal bacterial ARGs. Wilcoxon rank sum tests were used to assess differences in clinical characteristics, ARG counts, resistome diversity and ARG richness, pre- and post-FMT.<br><br>RESULTS: All 13 of the patients with sufficient stool samples for analysis had recently received antibiotics for pouchitis prior to a single endoscopic FMT. Fecal microbiomes of all patients had evidence of multi-drug resistance genes and ESBL resistance genes at baseline; 62% encoded fluoroquinolone resistance genes. A numerical decrease in overall ARG counts was noted post-FMT, but no statistically significant differences were noted (P&#x2009;=&#x2009;0.19). Richness and diversity were not significantly altered. Three patients developed infections during the 5-year follow-up period, none of which were associated with MDRO.<br><br>CONCLUSION: Antibiotic resistance genes are prevalent among antibiotic-exposed patients with chronic pouchitis. FMT led to a numerical decrease, but no statistically significant change in ARG, nor were there significant changes in the diversity, richness, or evenness of ARGs. Further investigations to improve FMT engraftment and to optimize FMT delivery in patients with inflammatory pouch disorders are warranted.}, }
@article {pmid39804408, year = {2025}, author = {Macdonald, JFH and Han, Y and Astafyeva, Y and Bergmann, L and Gurschke, M and Dirksen, P and Blümke, P and Schneider, YKH and Alawi, M and Lippemeier, S and Andersen, JH and Krohn, I}, title = {Exploring Tetraselmis chui microbiomes-functional metagenomics for novel catalases and superoxide dismutases.}, journal = {Applied microbiology and biotechnology}, volume = {109}, number = {1}, pages = {6}, pmid = {39804408}, issn = {1432-0614}, support = {AquaHealth FKZ 031B0945C//Bundesministerium f&#xfc;r Bildung und Forschung/ ; SuReMetS FKZ 031B0944A//Bundesministerium f&#xfc;r Bildung und Forschung/ ; }, mesh = {*Superoxide Dismutase/genetics/metabolism ; *Metagenomics ; Antioxidants/metabolism ; *Microbiota ; *Catalase/genetics/metabolism ; *Chlorophyta/microbiology/enzymology ; Metagenome ; *Microalgae/microbiology/enzymology ; Bacteria/genetics/enzymology/classification ; }, abstract = {The focus on microalgae for applications in several fields, e.g. resources for biofuel, the food industry, cosmetics, nutraceuticals, biotechnology, and healthcare, has gained increasing attention over the last decades. In this study, we investigate the microbiome of the cultured microalga Tetraselmis chui (T. chui) to highlight their potential for health benefits. In this context, biomolecules like antioxidants play a crucial role in the well-being of living organisms as they metabolise harmful reactive oxygen species (ROS) to reduce oxidative stress. Impaired processing of ROS leads to damaged cells and increases the risk of cancer, inflammatory diseases, and diabetes, among others. Here, we identify, characterise, and test bacterial antioxidants derived from the T. chui microbiome metagenome dataset. We identified 258 genes coding for proteins with potential antioxidant activity. Of those, four novel enzymes are expressed and identified as two superoxide dismutases (SOD), TcJM_SOD2 and TcIK_SOD3, and two catalases (CAT), TcJM_CAT2 and TcIK_CAT3. Extensive analyses characterised all implemented enzymes as active even in concentrations down to 25 ng*ml[-1] for the SODs and 15 ng*ml[-1] for the CATs. Furthermore, sequence-based analyses assign TcJM_SOD2 and TcIK_SOD3 to iron superoxide dismutases (Fe SODs) and TcJM_CAT2 and TcIK_CAT3 to heme-containing catalases. These candidates are phylogenetically classified within the phylum Pseudomonadota. Regarding the biotechnological potential, a toxicity assay did not indicate any harmful effects. The introduced enzymes may benefit medical applications and expand the potential of microalgae microbiomes. KEY POINTS: • Omics-based discoveries of antioxidant enzymes from Tetraselmis chui microbiome • Two superoxide dismutases and two catalases are identified and tested for activity • Enzyme sensitivity highlights biotechnological potential of microalgae microbiomes.}, }
@article {pmid39801456, year = {2025}, author = {Torozan, DA and Laczny, CC and Roomp, K and Wilmes, P and Fleckenstein, J and Schneider, JG}, title = {Metagenomic Profiling of Oral Microbiome Dynamics During Chemoradiotherapy in Head and Neck Squamous Cell Carcinoma Patients.}, journal = {Cancer medicine}, volume = {14}, number = {1}, pages = {e70589}, pmid = {39801456}, issn = {2045-7634}, support = {863664//H2020 European Research Council/ ; }, mesh = {Humans ; Male ; Female ; *Microbiota/radiation effects/genetics ; Middle Aged ; *Chemoradiotherapy/adverse effects ; *Squamous Cell Carcinoma of Head and Neck/therapy/microbiology ; Aged ; Metagenomics/methods ; *Head and Neck Neoplasms/therapy/microbiology ; Saliva/microbiology ; Metagenome ; Prospective Studies ; Adult ; *Mouth/microbiology ; Bacteria/genetics/classification ; }, abstract = {BACKGROUND: We explored the interaction between the oral microbiome and the development of radiation-induced mucositis in patients with head and neck squamous cell cancer (HNSCC) undergoing chemoradiotherapy (CRT). We prospectively studied the oral microbiome and compared it to healthy controls. Additionally, we compared patients with low-grade (LGM) vs. high-grade mucositis (HGM).<br><br>METHODS: Ten HNSCC patients scheduled for CRT were included. Saliva samples were characterized prior to, during, and nine months after CRT using metagenomic sequencing. We similarly characterized samples from seven healthy controls. We assessed alpha and beta diversity and examined abundances at different taxonomic levels between (sub)groups.<br><br>RESULTS: Patients exhibited significantly reduced alpha diversity compared to controls at all times (p &#x27e8; 0.05). Differential abundance of taxa between patients and controls was observed at baseline. In patients, the relative abundance of Staphylococcus aureus and Escherichia coli increased significantly during CRT. Capnocytophaga spp. was associated with the definitive CRT patients' subgroup. At baseline, two fungal families (Melampsoraceae and Herpotrichiellaceaea) were more abundant in patients who later developed HGM. No differentially abundant taxa were found between LGM vs. HGM during irradiation.<br><br>CONCLUSION: Our findings support the hypothesis that CRT, as well as HNSCC itself, influences the composition of the oral microbiome. Microbial markers found in patients who later developed HGM should be evaluated using independent cohorts to qualify their specific biomarker potential.}, }
@article {pmid39800795, year = {2025}, author = {Pagac, MP and Davient, B and Plado, LA and Lam, HYI and Lee, SM and Ravikrishnan, A and Chua, WLE and Muralidharan, S and Sridharan, A and Irudayaswamy, AS and Srinivas, R and Wearne, S and Mohamed Naim, AN and Ho, EXP and Ng, HQA and Kwah, JS and Png, E and Bendt, AK and Wenk, MR and Torta, F and Nagarajan, N and Common, J and Chong, YS and Tham, EH and Shek, LP and Loo, EXL and Chambers, J and Yew, YW and Loh, M and Dawson, TL}, title = {Life stage impact on the human skin ecosystem: lipids and the microbial community.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {13}, pmid = {39800795}, issn = {2055-5008}, mesh = {Humans ; *Skin/microbiology/metabolism/chemistry ; Female ; Adult ; *Lipid Metabolism ; Lipidomics ; *Microbiota ; Middle Aged ; Male ; Child ; Oxylipins/metabolism/analysis ; Malassezia/metabolism/genetics/isolation &amp; purification ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics ; Sebum/metabolism ; Keratinocytes/metabolism/microbiology ; Lipids/analysis ; Young Adult ; Interleukin-1beta/metabolism ; Interleukin-6/metabolism ; Adolescent ; }, abstract = {Sebaceous free fatty acids are metabolized by multiple skin microbes into bioactive lipid mediators termed oxylipins. This study investigated correlations between skin oxylipins and microbes on the superficial skin of pre-pubescent children (N = 36) and adults (N = 100), including pre- (N = 25) and post-menopausal females (N = 25). Lipidomics and metagenomics revealed that Malassezia restricta positively correlated with the oxylipin 9,10-DiHOME on adult skin and negatively correlated with its precursor, 9,10-EpOME, on pre-pubescent skin. Co-culturing Malassezia with keratinocytes demonstrated a link between 9,10-DiHOME and pro-inflammatory cytokines IL-1β and IL-6 production. We also observed strong correlations between other skin oxylipins and microbial taxa, highlighting life stage differences in sebum production and microbial community composition. Our findings imply a complex host-microbe communication system mediated by lipid metabolism occurring on human skin, warranting further research into its role in skin health and disease and paving the way towards novel therapeutic targets and treatments.}, }
@article {pmid39798925, year = {2025}, author = {Aleksandrova, RR and Nieuwenhuis, LM and Karmi, N and Zhang, S and Swarte, JC and Björk, JR and Gacesa, R and Blokzijl, H and Connelly, MA and Weersma, RK and Lisman, T and Festen, EAM and de Meijer, VE and , }, title = {Gut microbiome dysbiosis is not associated with portal vein thrombosis in patients with end-stage liver disease: a cross-sectional study.}, journal = {Journal of thrombosis and haemostasis : JTH}, volume = {23}, number = {4}, pages = {1407-1415}, doi = {10.1016/j.jtha.2024.12.036}, pmid = {39798925}, issn = {1538-7836}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Dysbiosis ; *Portal Vein ; Male ; Female ; Middle Aged ; Cross-Sectional Studies ; *Venous Thrombosis/microbiology/blood/diagnosis ; Methylamines/blood ; Feces/microbiology ; *End Stage Liver Disease/microbiology/complications/diagnosis/blood ; Case-Control Studies ; Aged ; Adult ; *Bacteria/classification/metabolism/genetics ; }, abstract = {BACKGROUND: Portal vein thrombosis (PVT) is a common complication in patients with end-stage liver disease (ESLD). The portal vein in patients with ESLD is proposedly an inflammatory vascular bed due to translocation of endotoxins and cytokines from the gut. We hypothesized that a proinflammatory gut microbiome and elevated trimethylamine N-oxide (TMAO), a driver of thrombosis, may contribute to PVT development.<br><br>OBJECTIVES: We investigated whether gut microbiome diversity, bacterial species, metabolic pathways, and TMAO levels are associated with PVT in patients with ESLD.<br><br>METHODS: Fecal samples, plasma samples, and data from patients with ESLD and healthy controls were collected through the TransplantLines Biobank and Cohort Study. PVT was defined as a thrombus in the portal vein within a year prior to or after fecal sample collection. Fecal samples were analyzed using Shotgun Metagenomic Sequencing, and TMAO levels were measured in plasma using a Vantera Clinical Analyzer.<br><br>RESULTS: One hundred two patients with ESLD, of which 23 with PVT, and 246 healthy controls were included. No significant difference in gut microbiome diversity was found between patients with PVT and without PVT (P&#xa0;= .18). Both ESLD groups had significantly lower alpha diversity than controls. Bacteroides fragilis and 3 Clostridiales species were increased in patients with PVT compared with without PVT. TMAO levels between the 3 groups were not significantly different.<br><br>CONCLUSION: We observed profound differences in gut microbiota between patients with ESLD and controls, but minimal differences between patients with ESLD with or without PVT. In our cohort, a gut-derived proinflammatory state was not associated with presence of PVT in patients with ESLD.}, }
@article {pmid39798664, year = {2025}, author = {Wu, Y and Liu, X and Yin, M and Pei, Y and Cui, Y and Li, J and Zhu, Y and Guo, W and Li, D}, title = {Combining metagenomic sequencing and molecular docking to understand signaling molecule degradation characteristics of quorum quenching consortia.}, journal = {Environmental research}, volume = {268}, number = {}, pages = {120815}, doi = {10.1016/j.envres.2025.120815}, pmid = {39798664}, issn = {1096-0953}, mesh = {*Quorum Sensing ; *Molecular Docking Simulation ; Metagenomics ; 4-Butyrolactone/analogs &amp; derivatives/metabolism ; Bacteria/metabolism/genetics ; *Microbial Consortia ; }, abstract = {Quorum quenching consortia (QQC) enriched by special substrates for bioaugmentation is a promising QQ technology to reduce biofouling, sludge yield, and sludge bulking. However, the effect of substrate type on the performance of QQC is still a research gap. This study selected three different substrates, regular AHLs (N-octanoyl-l-homoserine lactone, C8), 3-oxo-AHLs (3-oxo-octanoyl)-l-homoserine lactone, 3-oxo-C8), and AHLs analogs (γ-caprolactone, GCL) to enrich three QQC (C8-QQC, 3OC8-QQC, GCL-QQC). Combining metagenomic sequencing, protein prediction, and molecular docking to fill the above gaps from the perspective of bacteria and enzymes. The performance of the three QQC decreased with the increasing complexity of the molecular structure of the substrates. This decline was attributed to more complex substrate enriched with more bacteria, lacking QQ genes in the QQC. All QQC degraded N-acetyl-l-homoserine lactones (AHLs) via acylase and lactonase. C8-QQC and 3OC8-QQC showed stronger degradation capabilities for N-(3-oxo-hexanoyl)-L-homoserine lactone (3OC6) compared to N-hexanoyl-L-homoserine lactone (C6), whereas GCL-QQC exhibited stronger degradation for C6. Molecular docking results showed that in 3OC8-QQC and C8-QQC, most enzymes exhibited stronger degradation capabilities for long-chain and 3OAHLs. However, in GCL-QQC, more QQ enzymes showed stronger degradation for C6 than for 3OC6, explaining the observed differences in AHL degradation. β-Oxidation metabolic pathways in bins revealed differences in their abilities to metabolize octanoic acid from C8 and 3-oxo-octanoic acid from 3OC8, which influenced their abundance in the respective QQC. The study findings offer insights into the relationship between substrates and QQC performance at the gene and protein levels.}, }
@article {pmid39798533, year = {2025}, author = {Mao, X and Yin, X and Yang, Y and Gao, F and Li, S and Shi, X and Deng, Y and Li, L and Leung, KMY and Zhang, T}, title = {Longitudinal metagenomic analysis on antibiotic resistome, mobilome, and microbiome of river ecosystems in a sub-tropical metropolitan city.}, journal = {Water research}, volume = {274}, number = {}, pages = {123102}, doi = {10.1016/j.watres.2025.123102}, pmid = {39798533}, issn = {1879-2448}, mesh = {*Rivers/microbiology ; *Microbiota ; Metagenomics ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Microbial/genetics ; Hong Kong ; Ecosystem ; Cities ; }, abstract = {Rivers play an important role as reservoirs and sinks for antibiotic resistance genes (ARGs). However, it remains underexplored for the resistome and associated mobilome in river ecosystems, and hosts of riverine ARGs particularly the pathogenic ones are rarely studied. This study for the first time conducted a longitudinal metagenomic analysis to unveil the resistome, mobilome, and microbiome in river water, by collecting samples from 16 rivers in Hong Kong over a three-year period and using both short-read and long-read sequencing. Results revealed that aminoglycoside, bacitracin, β-lactam, macrolide lincosamide-streptogramin, and sulfonamide were the predominant ARG types in the river water samples. Riverine ARGs exhibited high spatial variations in abundance and diversity. Environmental factors such as fecal coliform count, Escherichia coli count, 5-day biochemical oxygen demand (BOD5), dissolved oxygen (DO), and total organic carbon (TOC) had a significant correlation to the absolute concentrations of ARGs. Nanopore sequencing was used to reveal the physical genetic linkage of mobile genetic elements (MGEs) with ARGs in river water samples. The results showed that qacEdelta, transposase, integrase, and Tn916 had a high prevalence in ARG-carrying long reads. Host tracking using ARG-carrying reads identified 23 pathogenic bacteria species that harbored ARGs. Some ARGs were shared by different bacterial groups. This study presented a nuanced insight of resistome in river water by a longitudinal metagenomic analysis and deepened our understanding of common and divergent riverine antimicrobial resistant risk across the regional patterns.}, }
@article {pmid39798310, year = {2025}, author = {Zhou, HZ and Wang, BQ and Ma, YH and Sun, YY and Zhou, HL and Song, Z and Zhao, Y and Chen, W and Min, J and Li, JW and He, T}, title = {The combination of metagenomics and metabolomics reveals the effect of nitrogen fertilizer application driving the remobilization of immobilization remediation cadmium and rhizosphere microbial succession in rice.}, journal = {Journal of hazardous materials}, volume = {487}, number = {}, pages = {137117}, doi = {10.1016/j.jhazmat.2025.137117}, pmid = {39798310}, issn = {1873-3336}, mesh = {*Oryza/metabolism/microbiology/growth &amp; development ; *Cadmium/metabolism/chemistry ; *Fertilizers ; Rhizosphere ; *Soil Pollutants/metabolism ; *Nitrogen ; Metagenomics ; Metabolomics ; Soil Microbiology ; Plant Roots/metabolism/microbiology ; Ammonia ; Microbiota ; Biodegradation, Environmental ; }, abstract = {The remobilization of cadmium (Cd) in contaminated farmland soil due to nitrogen fertilizer addition has raised significant concerns regarding the effectiveness of immobilization remediation. This study investigated the effects of ammonia nitrogen (NH4[+]-N) and nitrogen (NO3[-]-N) application (100 kg/ha) on the remobilization of immobilization of remediation Cd (bound to clay palygorskite) during various growth stages of rice through field experiments. Our findings revealed that increased organic acid secretion (e.g., benzoic acid and malic acid) from rice roots, induced by NH4[+]-N, significantly enhanced the NH4NO3-extractable Cd content. Consequently, the concentration of Cd in brown rice varied from 39.84 to 43.25 μg/kg to 78.31-90.44 μg/kg. While NO3[-]-N exhibited a relatively weaker capacity for Cd remobilization (Cd content in brown rices: 50.17-65.23 μg/kg). Meanwhile, the organic acid secretion in roots inhibited the expression of most functional genes (e.g., nifK and napA), leading to shifts in microbial communities and functional metabolism (e.g., Cd[2+] exporting). According to the results of metagenome-assembled genome (MAG) composition, specific MAGs with fewer functional annotations were enriched under NH4[+]-N treatment, may further increased risk of Cd exposure in rice by stimulating amt expression. Interaction analysis of metabolic products and microbial communities indicated acids linked to branched-chain amino acid (BCAA) metabolism and urea cycle might serve as a potentially key process influencing microbial dynamics.}, }
@article {pmid39798223, year = {2025}, author = {Larsson, SC and Ericson, U and Dekkers, KF and Arage, G and Rašo, LM and Sayols-Baixeras, S and Hammar, U and Baldanzi, G and Nguyen, D and Nielsen, HB and Holm, JB and Risérus, U and Michaëlsson, K and Sundström, J and Smith, JG and Engström, G and Ärnlöv, J and Orho-Melander, M and Fall, T and Ahmad, S}, title = {Meat intake in relation to composition and function of gut microbiota.}, journal = {Clinical nutrition (Edinburgh, Scotland)}, volume = {45}, number = {}, pages = {124-133}, doi = {10.1016/j.clnu.2024.12.034}, pmid = {39798223}, issn = {1532-1983}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Middle Aged ; Adult ; *Diet ; *Meat ; Red Meat ; Biomarkers/blood ; Aged ; }, abstract = {OBJECTIVE: Meat intake is suggested to affect gut microbiome composition and the risk of chronic diseases. We aimed to identify meat-associated gut microbiome features and their association with host factors.<br><br>DESIGN: Gut microbiota species were profiled by deep shotgun metagenomics sequencing in 9669 individuals. Intake of white meat, unprocessed red meat, and processed red meat was assessed using a food frequency questionnaire. The associations of meat intake with alpha-diversity and relative abundance of gut microbiota species were tested using linear regression models with adjustment for dietary fiber intake, body mass index, and other potential confounders. Meat-associated species were further assessed for association with enrichment of microbial gene function, meat-associated plasma metabolites, and clinical biomarkers.<br><br>RESULTS: Higher intake of processed red meat was associated with reduced alpha microbial diversity. White meat, unprocessed, and processed red meat intakes were associated with 36, 14, and 322 microbiota species, respectively. Species associated with processed red meat were enriched for bacterial pathways like amino acid degradation, while those negatively linked were enriched for pathways like homoacetogenesis. Furthermore, species positively associated with processed red meat were to a large extent associated with reduced trimethylamine N-oxide and glutamine levels but increased creatine and carnitine metabolites, fasting insulin and glucose, C-reactive protein, apolipoprotein A1, and triglyceride levels and higher blood pressure.<br><br>CONCLUSION: This largest to date population-based study on meat and gut microbiota suggests that meat intake, particularly processed red meat, may modify the gut microbiota composition, functional capacity, and health-related biomarkers.}, }
@article {pmid39797569, year = {2025}, author = {Rogers, AB and Kale, V and Baldi, G and Alberdi, A and Gilbert, MTP and Gupta, D and Limborg, MT and Li, S and Payne, T and Petersen, B and Rasmussen, JA and Richardson, L and Finn, RD}, title = {HoloFood Data Portal: holo-omic datasets for analysing host-microbiota interactions in animal production.}, journal = {Database : the journal of biological databases and curation}, volume = {2025}, number = {}, pages = {}, pmid = {39797569}, issn = {1758-0463}, mesh = {Animals ; *Chickens/microbiology ; *Microbiota ; *Salmon/microbiology ; *Databases, Genetic ; *Host Microbial Interactions ; Metadata ; *Gastrointestinal Microbiome ; }, abstract = {The HoloFood project used a hologenomic approach to understand the impact of host-microbiota interactions on salmon and chicken production by analysing multiomic data, phenotypic characteristics, and associated metadata in response to novel feeds. The project's raw data, derived analyses, and metadata are deposited in public, open archives (BioSamples, European Nucleotide Archive, MetaboLights, and MGnify), so making use of these diverse data types may require access to multiple resources. This is especially complex where analysis pipelines produce derived outputs such as functional profiles or genome catalogues. The HoloFood Data Portal is a web resource that simplifies access to the project datasets. For example, users can conveniently access multiomic datasets derived from the same individual or retrieve host phenotypic data with a linked gut microbiome sample. Project-specific metagenome-assembled genome and viral catalogues are also provided, linking to broader datasets in MGnify. The portal stores only data necessary to provide these relationships, with possible linking to the underlying repositories. The portal showcases a model approach for how future multiomics datasets can be made available. Database URL: https://www.holofooddata.org.}, }
@article {pmid39797470, year = {2025}, author = {Záhonová, K and Kaur, H and Furgason, CC and Smirnova, AV and Dunfield, PF and Dacks, JB}, title = {Comparative Analysis of Protist Communities in Oilsands Tailings Using Amplicon Sequencing and Metagenomics.}, journal = {Environmental microbiology}, volume = {27}, number = {1}, pages = {e70029}, pmid = {39797470}, issn = {1462-2920}, support = {e-INFRA CZ (90254)//the Ministry of Education, Youth and Sports of the Czech Republic/ ; CRDPJ 542973-19//Natural Sciences and Engineering Research Council of Canada/ ; RES0021028//Natural Sciences and Engineering Research Council of Canada/ ; }, mesh = {*Metagenomics/methods ; RNA, Ribosomal, 18S/genetics ; *Oil and Gas Fields/parasitology ; Alberta ; *Eukaryota/genetics/classification/isolation &amp; purification ; Phylogeny ; DNA Barcoding, Taxonomic ; Biodiversity ; Sequence Analysis, DNA ; }, abstract = {The Canadian province of Alberta contains substantial oilsands reservoirs, consisting of bitumen, clay and sand. Extracting oil involves separating bitumen from inorganic particles using hot water and chemical diluents, resulting in liquid tailings waste with ecotoxicologically significant compounds. Ongoing efforts aim to reclaim tailings-affected areas, with protist colonisation serving as one assessment method of reclamation progress. Oilsands-associated protist communities have mainly been evaluated using amplicon sequencing of the 18S rRNA V4 region; however, this barcode may overlook important protist groups. This study examined how community assessment methods between the V4 and V9 regions differ in representing protist diversity across four oilsands-associated environments. The V9 barcode identified more operational taxonomical units (OTUs) for Discoba, Metamonada and Amoebozoa compared with the V4. A comparative shotgun metagenomics approach revealed few eukaryotic contigs but did recover a complete Paramicrosporidia mitochondrial genome, only the second publicly available from microsporidians. Both V4 and V9 markers were informative for assessing community diversity in oilsands-associated environments and are most effective when combined for a comprehensive taxonomic estimate, particularly in anoxic environments.}, }
@article {pmid39796619, year = {2025}, author = {Johnson, AJ and Alvear, A and Knights, D and Chow, LS and Bantle, AE}, title = {A Randomized Pilot Study of Time-Restricted Eating Shows Minimal Microbiome Changes.}, journal = {Nutrients}, volume = {17}, number = {1}, pages = {}, pmid = {39796619}, issn = {2072-6643}, support = {KL2TR002492//National Institutes of Health, National Center of Advancing Translational Sciences/ ; UL1TR002494//National Institutes of Health, National Center for Advancing Translational Sciences/ ; K23DK115906/DK/NIDDK NIH HHS/United States ; 17SFR-2YR50LC//Healthy Foods, Healthy Lives Institute at the University of Minnesota/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Pilot Projects ; Feces/microbiology ; Male ; Female ; Adult ; Time Factors ; Body Composition ; *Obesity/microbiology/diet therapy ; Middle Aged ; *Fasting ; }, abstract = {OBJECTIVE: TRE is an emerging approach in obesity treatment, yet there is limited data on how it influences gut microbiome composition in humans. Our objective was to characterize the gut microbiome of human participants before and after a TRE intervention. This is a secondary analysis of a previously published clinical trial examining the effects of time-restricted eating (TRE).<br><br>METHODS: In a previously published, 12-week randomized controlled trial, Chow et al. evaluated the effects of an 8-h TRE intervention on body composition in human participants. Chow et al. demonstrated significant reductions in weight, lean mass, and visceral fat in the TRE group compared to those following time-unrestricted eating (non-TRE). Stool samples were collected by a subset of those participants using home kits at both baseline and post-intervention for shotgun metagenomic sequencing for this secondary analysis. Microbiome community composition was compared before and after intervention as alpha and beta diversity.<br><br>RESULTS: Sixteen participants provided stool samples (eight in the TRE group and eight in the non-TRE group). Stool samples were collected from all participants at at least one time point, but both pre- and post-treatment samples were available from only five participants who completed both baseline and post-treatment collections. In alignment with the findings of Chow et al., the participants in the TRE group of the secondary analysis who collected microbiome sample(s) successfully reduced their eating window from an average of 15.3 &#xb1; 0.8 h at baseline to 9.3 &#xb1; 1.7 h during the intervention (mean &#xb1; SD, p < 0.001) and the non-TRE group's eating window remained unchanged. While the TRE group lost weight and visceral fat mass, no effect of the TRE intervention was observed on alpha diversity (Shannon index, Simpson index, and number of taxa, linear mixed models), beta diversity (Bray-Curtis, PERMANOVA), even after controlling for weight and visceral fat changes.<br><br>CONCLUSIONS: Our analysis did not detect any significant differences in gut microbiome composition or diversity indices between participants undergoing a TRE intervention and those in the control group. The study's findings are limited by a small sample size, short duration, and the collection of stool samples at only two time points. Future studies with larger sample sizes, longer durations, and more frequent sampling, and collection of detailed dietary data are needed to better understand the relationship between TRE and gut microbiome dynamics.}, }
@article {pmid39796584, year = {2024}, author = {Firrman, J and Deyaert, S and Mahalak, KK and Liu, L and Baudot, A and Joossens, M and Poppe, J and Cameron, SJS and Van den Abbeele, P}, title = {The Bifidogenic Effect of 2'Fucosyllactose Is Driven by Age-Specific Bifidobacterium Species, Demonstrating Age as an Important Factor for Gut Microbiome Targeted Precision Medicine.}, journal = {Nutrients}, volume = {17}, number = {1}, pages = {}, pmid = {39796584}, issn = {2072-6643}, support = {8072-41000-102-00D//United States Department of Agriculture/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Trisaccharides/pharmacology ; Aged ; *Bifidobacterium/drug effects/metabolism/classification ; Infant ; Feces/microbiology ; Child, Preschool ; Age Factors ; Child ; Adult ; Male ; Female ; Oligosaccharides/pharmacology ; Middle Aged ; Lactose/pharmacology ; Milk, Human/chemistry ; Breast Feeding ; }, abstract = {BACKGROUND: The human gut microbiota develops in concordance with its host over a lifetime, resulting in age-related shifts in community structure and metabolic function. Little is known about whether these changes impact the community's response to microbiome-targeted therapeutics. Providing critical information on this subject, faecal microbiomes of subjects from six age groups, spanning from infancy to 70-year-old adults (n = six per age group) were harvested. The responses of these divergent communities to treatment with the human milk oligosaccharide 2'-fucosyllactose (2'FL), fructo-oligosaccharides (FOS), and lactose was investigated using the Ex vivo SIFR[®] technology that employs bioreactor fermentation and is validated to be predictive of clinical findings. Additionally, it was evaluated whether combining faecal microbiomes of a given age group into a single pooled microbiome produced similar results as the individual microbiomes.<br><br>RESULTS: First, marked age-dependent changes in community structure were identified. Bifidobacterium levels strongly declined as age increased, and Bifidobacterium species composition was age-dependent: B. longum, B. catenulatum/pseudocatenulatum, and B. adolescentis were most prevalent for breastfed infants, toddlers/children, and adults, respectively. Metabolomic analyses (LA-REIMS) demonstrated that these age-dependent differences particularly impacted treatment effects of 2'FL (more than FOS/lactose). Further analysis revealed that while 2'FL enhanced production of short-chain fatty acids (SCFAs) and exerted potent bifidogenic effects, regardless of age, the specific Bifidobacterium species enhanced by 2'FL, as well as subsequent cross-feeding interactions, were highly age-dependent. Furthermore, single-pooled microbiomes produced results that were indicative of the average treatment response for each age group. Nevertheless, pooled microbiomes had an artificially high diversity, thus overestimating treatment responses (especially for infants), did not recapitulate interindividual variation, and disallowed for the correlative analysis required to unravel mechanistic actions.<br><br>CONCLUSIONS: Age is an important factor in shaping the gut microbiome, with the dominant taxa and their metabolites changing over a lifetime. This divergence affects the response of the microbiota to therapeutics, demonstrated in this study using 2'FL. These results evidence the importance of screening across multiple age groups separately to provide granularity of how therapeutics impact the microbiome and, consequently, human health.}, }
@article {pmid39796532, year = {2024}, author = {Paterson, S and Majchrzak, M and Gómez-Garre, D and Ortega-Hernández, A and Sánchez-González, S and de la Fuente, M&#xc1; and Gómez-Cortés, P and Hernández-Ledesma, B}, title = {Role of Simulated Nannochloropsis gaditana Digests in Shaping Gut Microbiota and Short-Chain Fatty Acid Levels.}, journal = {Nutrients}, volume = {17}, number = {1}, pages = {}, pmid = {39796532}, issn = {2072-6643}, support = {PID2021-122989OB-I00//Ministerio de Ciencia, Innovaci&#xf3;n y Universidades/ ; PIPF-2022/BIO-24996//Comunidad Aut&#xf3;noma de Madrid/ ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; *Fatty Acids, Volatile/metabolism ; Fermentation ; *Stramenopiles/metabolism ; *Microalgae/metabolism ; RNA, Ribosomal, 16S/genetics ; Colon/microbiology/metabolism ; Bacteria/metabolism/classification/genetics ; }, abstract = {The connection between gut microbiota and factors like diet is crucial for maintaining intestinal balance, which in turn impacts the host's overall health. Nannochloropsis gaditana microalgae is a sustainable source of bioactive compounds, mainly known for its used in aquaculture and extraction of bioactive lipids, with potential health benefits whose effects on human gut microbiota are still unknown. Therefore, the goal of this work was to assess the impact of N. gaditana on human gut microbiota composition and derived metabolites by combining the INFOGEST protocol and in vitro colonic fermentation process to evaluate potential effects on human gut microbiota conformation through 16S rRNA gene sequencing and its metabolic functionality. The results have demonstrated the ability of the digests from N. gaditana to significantly modify gut microbiota composition, promoting an increase in beneficial bacterial genera such as Akkermansia, Butyricicoccus, Eisenbergiella, Lachnoclostridium, and Marvinbryantia, in contrast to inulin, after 48 h of colonic fermentation. Additionally, the digests increased the levels of both major and minor short-chain fatty acids (SCFAs), particularly butyric and valeric acids, considered as intestinal biomarkers, and increased ammonium production. This research has demonstrated, for the first time, the potential of N. gaditana microalgae as a sustainable agent for influencing the composition and functionality of human gut microbiota.}, }
@article {pmid39796518, year = {2024}, author = {Vega-Rojas, A and Haro, C and Molina-Abril, H and Guil-Luna, S and Santos-Marcos, JA and Gutierrez-Mariscal, FM and Garcia-Fernandez, H and Caballero-Villarraso, J and Rodriguez-Ariza, A and Lopez-Miranda, J and Perez-Martinez, P and Hervas, A and Camargo, A}, title = {Gut Microbiota Interacts with Dietary Habits in Screenings for Early Detection of Colorectal Cancer.}, journal = {Nutrients}, volume = {17}, number = {1}, pages = {}, pmid = {39796518}, issn = {2072-6643}, support = {PI-0055-2021//Consejer&#xed;a de Salud y Consumo/ ; PI-0156-2016//Consejer&#xed;a de Salud y Consumo/ ; AGL2015-67896-P//Ministerio de Ciencia, Innovaci&#xf3;n y Universidades/ ; n.a.//European Union/ ; CP14/00114//Instituto de Salud Carlos III/ ; PI19/00299//Instituto de Salud Carlos III/ ; DTS19/00007//Instituto de Salud Carlos III/ ; PI22/00925//Instituto de Salud Carlos III/ ; C1-0001-2022//Andalusian Health Service/ ; }, mesh = {Humans ; *Colorectal Neoplasms/diagnosis/microbiology ; *Gastrointestinal Microbiome ; *Early Detection of Cancer/methods ; Male ; Female ; Middle Aged ; *Feeding Behavior ; Aged ; Colonoscopy ; Occult Blood ; *Diet ; Adenocarcinoma/diagnosis/microbiology ; }, abstract = {BACKGROUND/OBJECTIVES: Gut microbiota interacts with nutrients, which may be relevant to assigning a microbial signature to colorectal cancer (CRC). We aim to evaluate the potential of gut microbiota combined with dietary habits in the early detection of pathological findings related to CRC in the course of a screening program.<br><br>METHODOLOGY: The colonoscopy performed on 152 subjects positive for fecal occult blood test showed that 6 subjects had adenocarcinoma, 123 had polyps, and 23 subjects had no pathological findings. Gut microbiota was analyzed by 16S metagenomic. Caret package was used to build the classification models in R.<br><br>RESULTS: Random forest (RF) classifier models were used to test the potential of gut microbiota alone or combined with dietary habits as a biomarker to discern between individuals with CRC-related lesions (polyps or adenocarcinoma) versus individuals without pathological findings. RF classifier models yielded an area under the curve of 0.790 using gut microbiota data, 0.710 using dietary habits data, and 0.804 in the combined model including gut microbiota and dietary habits data. The abundance of Suterella, Oscillospirales, Proteobacteria, and Burkholderiales was highly discriminant between groups, together with the consumption of fruit and vegetables and the consumption of carbonated and/or sweetened beverages.<br><br>CONCLUSIONS: Our results suggest that the interaction between gut microbiota and dietary habits is relevant when a microbial signature is used as a marker in CRC. Moreover, gut microbiota signature and information about the dietary habits of the individuals seem to be important for improving screening programs for the early detection of CRC.}, }
@article {pmid39796082, year = {2024}, author = {Kim, DG and Lee, CM and Lee, YS and Yoon, SH and Kim, SY}, title = {Isolation of a Novel Low-Temperature-Active and Organic-Solvent-Stable Mannanase from the Intestinal Metagenome of Hermetia illucens.}, journal = {International journal of molecular sciences}, volume = {26}, number = {1}, pages = {}, pmid = {39796082}, issn = {1422-0067}, support = {Project No. PJ008604//Rural Development Administration/ ; }, mesh = {Animals ; *Metagenome ; *Mannosidases/genetics/metabolism/chemistry/isolation &amp; purification ; Phylogeny ; Enzyme Stability ; Mannans/metabolism ; Solvents/chemistry ; *Gastrointestinal Microbiome ; Hydrolysis ; Substrate Specificity ; Hydrogen-Ion Concentration ; Amino Acid Sequence ; *beta-Mannosidase/genetics/metabolism/chemistry/isolation &amp; purification ; Cold Temperature ; Galactans/metabolism ; Plant Gums/metabolism ; Temperature ; Galactose/analogs &amp; derivatives ; }, abstract = {The black soldier fly, Hermetia illucens, is a voracious scavenger of various organic materials; therefore, it could be exploited as a biological system for processing daily food waste. In order to survey novel hydrolytic enzymes, we constructed a fosmid metagenome library using unculturable intestinal microorganisms from H. illucens. Through functional screening of the library on carboxymethyl cellulose plates, we identified a fosmid clone, the product of which displayed hydrolytic activity. Sequence analysis of the fosmid revealed a novel mannan-degrading gene, ManEM6, composed of 1185 base pairs encoding 394 amino acids, with a deduced 20-amino-acid N-terminal signal peptide sequence. The conceptual translation of ManEM6 exhibited the highest identity (78%) to endo-1,4-β-mannosidase from Dysgonomonas mossii. Phylogenetic and domain analyses indicated that ManEM6 encodes a novel mannanase with a glycoside hydrolase family 26 domain. The recombinant protein rManEM6 showed its highest activity at 40 °C and pH 7.0, and it remained stable in the range of pH 5-10.0. rManEM6 hydrolyzed substrates with β-1,4-glycosidic mannoses, showing maximum enzymatic activity toward locust bean gum galactomannan, while it did not hydrolyze p-nitrophenyl-β-pyranosides, demonstrating endo-form mannosidase activity. rManEM6 was highly stable under stringent conditions, including those of polar organic solvents, as well as reducing and denaturing reagents. Therefore, ManEM6 may be an attractive candidate for the degradation of mannan under high-organic-solvent and protein-denaturing processes in the food and feed industries.}, }
@article {pmid39794871, year = {2025}, author = {Samodova, D and Stankevic, E and Søndergaard, MS and Hu, N and Ahluwalia, TS and Witte, DR and Belstrøm, D and Lubberding, AF and Jagtap, PD and Hansen, T and Deshmukh, AS}, title = {Salivary proteomics and metaproteomics identifies distinct molecular and taxonomic signatures of type-2 diabetes.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {5}, pmid = {39794871}, issn = {2049-2618}, support = {74550801//European Foundation for the Study of Diabetes/ ; NNF18CC0034900; NNF23SA0084103//Novo Nordisk Fonden/ ; }, mesh = {Humans ; *Diabetes Mellitus, Type 2/microbiology/metabolism ; *Saliva/microbiology/chemistry/metabolism ; *Proteomics/methods ; Male ; Female ; Middle Aged ; Microbiota ; Adult ; Bacterial Proteins/analysis ; *Salivary Proteins and Peptides/analysis ; Biomarkers/analysis ; *Proteome/analysis ; Case-Control Studies ; *Bacteria/classification/genetics/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Computational Biology ; Aged ; }, abstract = {BACKGROUND: Saliva is a protein-rich body fluid for noninvasive discovery of biomolecules, containing both human and microbial components, associated with various chronic diseases. Type-2 diabetes (T2D) imposes a significant health and socio-economic burden. Prior research on T2D salivary microbiome utilized methods such as metagenomics, metatranscriptomics, 16S rRNA sequencing, and low-throughput proteomics.<br><br>RESULTS: We conducted ultrafast, in-depth MS-based proteomic and metaproteomic profiling of saliva from 15 newly diagnosed T2D individuals and 15 age-/BMI-matched healthy controls (HC). Using state-of-the-art proteomics, over 4500 human and bacterial proteins were identified in a single 21-min run. Bioinformatic analysis revealed host signatures of altered immune-, lipid-, and glucose-metabolism regulatory systems, increased oxidative stress, and possible precancerous changes in T2D saliva. Abundance of peptides for bacterial genera such as Neisseria and Corynebacterium were altered showing biomarker potential, offering insights into disease pathophysiology and microbial applications for T2D management.<br><br>CONCLUSIONS: This study presents a comprehensive mapping of salivary proteins and microbial communities, serving as a foundational resource for enhancing understanding of T2D pathophysiology. The identified biomarkers hold promise for advancing diagnostics and therapeutic approaches in T2D and its associated long-term complication Video Abstract.}, }
@article {pmid39794618, year = {2025}, author = {Nguyen, HP and Le, BT and Nguyen, HN and Nguyen, TT and Duong, TH and Hoang, TC and Duy, NPT and Nguyen, MV and Duong, LN and Le, LQ and Pham, TT}, title = {Demonstration of adapted packed-bed bioreactor for accurate and rapid estimation of biochemical oxygen demand: insights into the influence of microbial community structure and functions.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {41}, number = {2}, pages = {31}, pmid = {39794618}, issn = {1573-0972}, support = {NCUD.02-2019.52//Vietnam National Foundation for Science and Technology Development (NAFOSTED)/ ; }, mesh = {*Bioreactors/microbiology ; *Wastewater/microbiology/chemistry ; *Biological Oxygen Demand Analysis/methods ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; *Microbial Consortia ; Metagenomics ; Metagenome ; Oxygen/metabolism ; Cocos ; Biodegradation, Environmental ; }, abstract = {This study demonstrated a novel approach to accurately estimate 5-day biochemical oxygen demand (BOD5) in textile wastewater using a microbial consortium from food processing wastewater fixed on coconut fibers. Although glucose-glutamic acid (GGA) has been widely known as the most preferred substrates for microbial respiration, its calibration surprisingly resulted in an overestimation of BOD5 in textile wastewater due to its lower utilization rate compared to that of textile wastewater. After being adapted with a new nutrient environment composed of GGA and textile wastewater, the adapted packed-bed bioreactors (PBBRs) was capable of accurate estimation of BOD5 in textile wastewater using GGA standard solution. Metagenomic analysis revealed the dominance of the genera Enterobacter, Acinetobacter, Chryseobacterium, and Comamonas in the adapted microbial community, which are recognized for their significant potential in azo dye degradation. The imputed metagenome showed an enhanced showed an enhanced abundance of "Amino Acid Degradation" and "Carbohydrate Degradation" functions, confirming the improved ability of adapted community to utilization of GGA in the standard solution. These findings suggest that adaptation of exogenous microbial consortium to a nutrient environment composed of GGA and target wastewater may shift the community to that dominated by strains having both utilization ability of GGA and target compounds which, in turn, enhance the accuracy of the adapted PBBRs for estimation of BOD5 in target wastewater.}, }
@article {pmid39794474, year = {2025}, author = {Yin, Q and da Silva, AC and Zorrilla, F and Almeida, AS and Patil, KR and Almeida, A}, title = {Ecological dynamics of Enterobacteriaceae in the human gut microbiome across global populations.}, journal = {Nature microbiology}, volume = {10}, number = {2}, pages = {541-553}, pmid = {39794474}, issn = {2058-5276}, support = {MR/W016184/1//RCUK | Medical Research Council (MRC)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Enterobacteriaceae/genetics/classification/isolation &amp; purification/physiology ; Metagenome ; Feces/microbiology ; Enterobacteriaceae Infections/microbiology ; }, abstract = {Gut bacteria from the Enterobacteriaceae family are a major cause of opportunistic infections worldwide. Given their prevalence among healthy human gut microbiomes, interspecies interactions may play a role in modulating infection resistance. Here we uncover global ecological patterns linked to Enterobacteriaceae colonization and abundance by leveraging a large-scale dataset of 12,238 public human gut metagenomes spanning 45 countries. Machine learning analyses identified a robust gut microbiome signature associated with Enterobacteriaceae colonization status, consistent across health states and geographic locations. We classified 172 gut microbial species as co-colonizers and 135 as co-excluders, revealing a genus-wide signal of colonization resistance within Faecalibacterium and strain-specific co-colonization patterns of the underexplored Faecalimonas phoceensis. Co-exclusion is linked to functions involved in short-chain fatty acid production, iron metabolism and quorum sensing, while co-colonization is linked to greater functional diversity and metabolic resemblance to Enterobacteriaceae. Our work underscores the critical role of the intestinal environment in the colonization success of gut-associated opportunistic pathogens with implications for developing non-antibiotic therapeutic strategies.}, }
@article {pmid39793775, year = {2025}, author = {Li, X and Ning, L and Zhao, H and Gu, C and Han, Y and Xu, W and Si, Y and Xu, Y and Wang, R and Ren, Q}, title = {Jiawei Ermiao Granules (JWEMGs) clear persistent HR-HPV infection though improving vaginal microecology.}, journal = {Journal of ethnopharmacology}, volume = {341}, number = {}, pages = {119342}, doi = {10.1016/j.jep.2025.119342}, pmid = {39793775}, issn = {1872-7573}, mesh = {Female ; Humans ; *Vagina/microbiology/drug effects/virology ; Adult ; *Papillomavirus Infections/drug therapy/microbiology/virology ; *Drugs, Chinese Herbal/pharmacology/therapeutic use ; Microbiota/drug effects ; Middle Aged ; Young Adult ; Cytokines/metabolism ; *Antiviral Agents/pharmacology/therapeutic use ; }, abstract = {Jiawei Ermiao Granules (JWEMGs), a traditional Chinese herbal formulation, has been widely used in China for the treatment of human papillomavirus (HPV) infections. However, the underlying mechanisms through which it exerts its antiviral effects remain poorly understood.<br><br>AIM OF THE STUDY: This study aimed to investigate the potential mechanisms by which JWEMGs modulate vaginal microecology and clear HPV infections, utilizing clinical trials, metagenomic sequencing, and in vitro models.<br><br>MATERIALS AND METHODS: Clinical indicators related to vaginal microecology, such as vaginal pH, cleanliness, Nugent score, Donders score, catalase, neuraminidase, and leukocyte esterase, were evaluated in 65 patients with high-risk HPV (HR-HPV) infection. The study examined the impact of two courses of oral JWEMGs on these clinical parameters. Additionally, metagenomic sequencing was performed on vaginal lavage samples from 33 patients to assess the alteration of the vaginal microbiome following JWEMGs treatment. Immunohistochemistry was used to detect ALPK1 expression in cervical exfoliated cells, and ELISA was employed to measure cytokine levels in vaginal lavage fluid. JWEMGs intervention was applied to HaCaT-HPV E6/E7 cells to evaluate its effects on restoring &#x3b1;-kinase 1 (ALPK1) expression and promoting the secretion of cytokines and chemokines.<br><br>RESULTS: Treatment with JWEMGs significantly improved several clinical indicators, including cleanliness, pH, Nugent score, Donders score, catalase, neuraminidase, and leukocyte esterase, in HR-HPV-infected patients. Furthermore, JWEMGs therapy led to an increased abundance of Lactobacillus species, especially Lactobacillus crispatus, and a marked reduction in Gardnerella species. JWEMGs treatment also significantly promoted ALPK1 expression in cervical exfoliated cells and augmented the secretion of key cytokines, including IL-6, IL-8, and TNF-&#x3b1;. In parallel, in vitro results showed that JWEMGs substantially enhanced IL-6, IL-8, TNF-&#x3b1;, CCL2, CCL5, and CCL7 secretion in HaCaT-HPV E6/E7 cells, which correlated with the activation of the ALPK1/NF-&#x3ba;B signaling pathway.<br><br>CONCLUSION: In conclusion, JWEMGs treatment effectively remodels the vaginal microbiota and bolsters mucosal immunity in the lower genital tract, thereby improving the vaginal microecology in HR-HPV-infected individuals. In vitro findings further demonstrated that JWEMGs promote cytokine and chemokine expression, activating the ALPK1/NF-&#x3ba;B pathway.}, }
@article {pmid39793486, year = {2025}, author = {Eckermann, H and Lustermans, H and Parnanen, K and Lahti, L and de Weerth, C}, title = {Maternal pre- and postnatal stress and maternal and infant gut microbiota features.}, journal = {Psychoneuroendocrinology}, volume = {172}, number = {}, pages = {107273}, doi = {10.1016/j.psyneuen.2024.107273}, pmid = {39793486}, issn = {1873-3360}, mesh = {Humans ; Female ; *Gastrointestinal Microbiome/physiology ; Pregnancy ; *Stress, Psychological/microbiology/metabolism ; Adult ; Infant ; Feces/microbiology ; Postpartum Period ; Hydrocortisone/analysis ; Proteobacteria/isolation &amp; purification ; Mothers/psychology ; Bifidobacterium/isolation &amp; purification ; Infant, Newborn ; Anxiety/microbiology ; Hair/chemistry ; Male ; }, abstract = {BACKGROUND: Maternal stress can have short and long term adverse (mental) health effects for the mother and her child. Previous evidence suggests that the gut microbiota may be a potential mediator and moderator for the effects of stress via various pathways. This study explored the maternal microbiota trajectory during pregnancy as well as the association between pre- and postnatal maternal stress and features of the maternal and infant gut microbiota during and after pregnancy. In line with previous research, we hypothesized that maternal stress would be positively related to maternal and infant microbiota volatility and that infants of highly stressed mothers would show a relative increase in Proteobacteria and a relative decrease in Bifidobacterium.<br><br>METHODS: We collected maternal stool samples at 18 and 32 weeks of pregnancy and 8 months postpartum. Infant stools samples were obtained at 2, 6 and 12 weeks and 8 months postpartum. All samples were analyzed using shotgun metagenome sequencing. We also collected several measures of maternal stress (self-reported depression, anxiety, and stress, and hair cortisol and cortisone), most at the same time points as the microbiota samples.<br><br>RESULTS: Our data indicated that the maternal microbiota does not undergo drastic changes from the second to the third trimester of pregnancy but that the postpartum microbiota differs significantly from the prenatal microbiota. Furthermore, we identified associations between several stress measures and maternal and infant gut microbiota features at different time points including positive and negative associations with alpha diversity, beta diversity and individual microbial phyla and species relative abundances. Also, the maternal stress composite score, the perceived stress score and the log-ratio of hair cortisol and cortisone were all positively associated with infant microbiota volatility.<br><br>CONCLUSION: Our study provides evidence that maternal prenatal and postnatal stress is related to both the maternal and the infant microbiota. Collectively, this and previous studies indicate that maternal stress does not uniformly associate with most gut microbial features. Instead, the associations are highly time point specific. Regarding infant microbiota volatility, we have consistently found a positive association between stress and infant microbiota volatility. This warrants future research investigating this link in more depth.}, }
@article {pmid39793467, year = {2025}, author = {Cardacino, A and Turco, S and Balestra, GM}, title = {Seasonal dynamics of kiwifruit microbiome: A case study in a KVDS-affected orchard.}, journal = {Microbiological research}, volume = {292}, number = {}, pages = {128044}, doi = {10.1016/j.micres.2024.128044}, pmid = {39793467}, issn = {1618-0623}, mesh = {*Plant Diseases/microbiology ; *Microbiota ; Soil Microbiology ; Seasons ; *Bacteria/classification/genetics/isolation &amp; purification ; *Fungi/classification/isolation &amp; purification/genetics ; *Actinidia/microbiology ; Italy ; Plant Roots/microbiology ; Metagenomics ; Phylogeny ; }, abstract = {Over the past decade, Italian kiwifruit orchards and overall production have faced a significant threat from Kiwifruit Vine Decline Syndrome (KVDS). Despite the insights gained from metagenomics studies into the microbial communities associated with the disease, unanswered questions still remain. In this study, the evolution of bacterial, fungal, and oomycetes communities in soil and root endosphere at three different time points during the vegetative season was investigated for the first time in a KVDS-affected orchard in the Lazio Region. The fungal and oomycetes genera previously associated with the syndrome, including Fusarium, Ilyonectria, Thelonectria, Phytophthora, Pythium and Globisporangium, were identified in both groups. In contrast, the characterization of bacterial communities revealed the first instance of the presence of the genus Ralstonia in soil and root samples. The microbiome composition shifts between KVDS-affected and asymptomatic plants were significant as evidenced by the results, particularly after a temperature increase. This temperature change coincided with the onset of severe disease symptoms and may indicate a key role in the progression of KVDS.}, }
@article {pmid39793444, year = {2025}, author = {Verheijden, RJ and van Eijs, MJM and Paganelli, FL and Viveen, MC and Rogers, MRC and Top, J and May, AM and van de Wijgert, JHHM and Suijkerbuijk, KPM and , }, title = {Gut microbiome and immune checkpoint inhibitor toxicity.}, journal = {European journal of cancer (Oxford, England : 1990)}, volume = {216}, number = {}, pages = {115221}, doi = {10.1016/j.ejca.2025.115221}, pmid = {39793444}, issn = {1879-0852}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/immunology ; *Immune Checkpoint Inhibitors/adverse effects ; Male ; Female ; Middle Aged ; Aged ; Prospective Studies ; *Neoplasms/drug therapy/immunology ; Adult ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Multiple studies have suggested that gut microbiome may influence immune checkpoint inhibitor (ICI) efficacy, but its association with immune-related adverse events (irAEs) is less well studied. In this prospective cohort study, we assessed whether gut microbiome composition at start, or changes during ICI, are associated with severe irAEs.<br><br>METHODS: Stool samples of cancer patients treated with anti-PD-1&#x202f;&#xb1;&#x202f;anti-CTLA-4 were analyzed using 16S rRNA gene sequencing and metagenomic shotgun sequencing. Differences in alpha and beta diversity between patients with and without severe irAE were assessed, as well as differential relative abundance (RA) of taxa, MetaCyc pathways, and seven prespecified literature-based bacterial groups including pathobionts and Ruminococcaceae.<br><br>FINDINGS: We analyzed 497 samples of 195 patients before and soon after starting ICI, at severe irAE onset and after starting immunosuppression. Mean RA of the pathobionts group was significantly higher in patients who developed a severe irAE (8.2&#x202f;%) compared to those who did not (4.8&#x202f;%; odds ratio 1.40; 95&#x202f;%CI 1.07-1.87) at baseline, and also early during ICI treatment and at severe irAE onset. A significantly stronger decrease in RA of Ruminococcaceae after starting ICI was observed in patients who developed a severe irAE compared to those who did not. RAs of Ruminococcaceae, the genus Ruminococcus, and the species R. bromii and R. callidus were significantly lower at severe irAE onset compared to other time points.<br><br>INTERPRETATION: Gut microbiome dysbiosis signaled by higher RA of pathobionts and decrease in RA of Ruminococcaceae may predispose to severe irAEs.}, }
@article {pmid39789436, year = {2025}, author = {Cao, T and Guo, Y and Lin, L and Wang, D and Liu, Z and Zou, X and Ke, Y and Lv, Z}, title = {Effect of folpet on hypoglycaemia, intestinal microbiota, and drug resistance genes in mice.}, journal = {BMC microbiology}, volume = {25}, number = {1}, pages = {11}, pmid = {39789436}, issn = {1471-2180}, support = {JCYJ20210324124014040//Shenzhen Science and Technology Program/ ; JCYJ20210324124201004//Shenzhen Science and Technology Program/ ; SZSM202011008//Sanming Project of Medicine in Shenzhen/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/genetics ; Mice ; *Hypoglycemia/genetics/chemically induced ; Blood Glucose/metabolism/drug effects ; Sulfonamides/pharmacology ; Bacteria/drug effects/genetics/classification/isolation &amp; purification ; Male ; Metagenomics ; }, abstract = {BACKGROUND: Folpet is a nonspecific sulfonamide fungicide widely used to protect crops from mildew. However, the in vivo effects of folpet on glucose metabolism homeostasis, gut microbiota, and abundance of drug resistance genes remain unknown. The purpose of this study was to assess the effects of the pesticide, folpet, on glucose metabolism homeostasis, and folpet-induced changes in the intestinal microbiota and resistance genes in mice.<br><br>METHODS: Mice were orally administered folpet at 0, 1, 10, and 100&#xa0;mg/kg body weight/day for 5 weeks. Blood sugar levels in mice were measured after 5 weeks of folpet administration. Metagenomic sequencing and drug resistance gene analyses were performed to explore changes in the abundance of gut microbiota members and drug resistance genes in mice after folpet administration. Correlation analysis was performed using metabolomics to explore the relationship between intestinal microbiota, drug resistance genes, and glucose metabolism.<br><br>RESULTS: Mice in the folpet group had significantly lower blood glucose levels than those in the control group. The abundance of Atopobium, Libanicoccus, Collinsella, and Parabacteroides in the intestinal microbiota of folpet-treated mice was significantly higher than that in the control group. However, the abundance of Mailhella, Bilophila, Roseburia, and Bacteroides were reduced in folpet-treated mice. Compared with the control group, the abundance of APH6-Ic and AAC6-Ie-APH2-Ia resistance genes in mice treated with folpet significantly increased. The abundance of tetQ, ermE, and BahA resistance genes was significantly reduced after folpet treatment.<br><br>CONCLUSIONS: Folpet is associated with changes in the abundance of gut microbiota in mice and may also affect the abundance of drug-resistance genes and the regulation of blood glucose levels.}, }
@article {pmid39788986, year = {2025}, author = {Patova, A and Ribeiro, PA and Murillo, FJ and Riesgo, A and Taboada, S and Pomponi, SA and Rapp, HT and Kenchington, E and Xavier, JR}, title = {Population genomics and connectivity of Vazella pourtalesii sponge grounds of the northwest Atlantic with conservation implications of deep sea vulnerable marine ecosystems.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {1540}, pmid = {39788986}, issn = {2045-2322}, mesh = {*Metagenomics ; *Porifera/genetics/metabolism ; Atlantic Ocean ; *Ecosystem ; *Aquatic Organisms/genetics/metabolism ; *Conservation of Natural Resources ; Hunting/statistics &amp; numerical data ; Animal Distribution ; Animals ; Polymorphism, Single Nucleotide/genetics ; Nova Scotia ; }, abstract = {Sponges are key ecosystem engineers that shape, structure and enhance the biodiversity of marine benthic communities globally. Sponge aggregations and reefs are recognized as vulnerable marine ecosystems (or VMEs) due to their susceptibility to damage from bottom-contact fishing gears. Ensuring their long-term sustainability, preservation, and ecosystem functions requires the implementation of sound scientific conservation tools. Here, the genetic diversity, structure, and connectivity of the deep-sea glass sponge, Vazella pourtalesii (Schmidt, 1870), was investigated using 1,102 neutral SNPs obtained in RADseq. This species is distributed across the northwest Atlantic from Florida, USA to Nova Scotia, Canada and we sequenced samples covering this full distribution and provided evidence of strong genetic structure with two distinct clusters: Florida together with the Carolina Shelves and the Scotian Shelf. We estimated moderate levels of diversity with low migration across large distances (> 1000 kms) and high connectivity at smaller scales (< 300 kms). Further, fishing pressure on genetic diversity was evaluated, within two Sponge Conservation Areas (SCAs) on the Scotian Shelf. Those areas have different disturbance histories, and cumulative fishing pressure. Slightly lower levels of genetic diversity were found inside the SCAs, and yet they encompassed a high proportion of the diversity observed within the Scotian Shelf. We provide baseline data for future monitoring of the SCAs, discussing our findings in the light of existing area-based management tools.}, }
@article {pmid39788961, year = {2025}, author = {Banerjee, G and Papri, SR and Huang, H and Satapathy, SK and Banerjee, P}, title = {Deep sequencing-derived Metagenome Assembled Genomes from the gut microbiome of liver transplant patients.}, journal = {Scientific data}, volume = {12}, number = {1}, pages = {39}, pmid = {39788961}, issn = {2052-4463}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Liver Transplantation ; *Metagenome ; High-Throughput Nucleotide Sequencing ; Akkermansia ; Fatty Liver/microbiology ; }, abstract = {Recurrence of metabolic dysfunction-associated steatotic liver disease (MASLD) after liver transplantation (LT) is a continuing concern. The role of gut microbiome dysbiosis in MASLD initiation and progression has been well established. However, there is a lack of comprehensive gut microbiome shotgun sequence data for patients experiencing MASLD recurrence after LT. In this data descriptor, we describe a dataset of deep metagenomic sequences of a well-defined LT recipient population. Community-based analysis revealed a high abundance of Akkermansia muciniphila, consistently observed in most patient samples with a low (0-2) MASLD Activity Score (NAS). We constructed 357 metagenome-assembled genomes (MAGs), including 220 high-quality MAGs (>90% completion). The abundance of different species of Bacteroides MAGs dominated in patient samples with NAS > 5 ("definite MASH"). In contrast, the MAGs of A. muciniphila, Akkermansia sp., and Blutia sp. dominated in samples from patients without MASH (NAS = 0-2). In addition, the phylogenetic analysis of A. muciniphila and Akkermansia sp. MAGs identified two new phylogroups of Akkermansia that are distinct from the previously reported three phylogroups.}, }
@article {pmid39788783, year = {2025}, author = {Franz, K and Markó, L and Mähler, A and Chakaroun, R and Heinitz, S and Schlögl, H and Sacher, J and Steckhan, N and Dechend, R and Adams, N and Andersen, M and Glintborg, D and Viehweger, M and Bahr, LS and Forslund-Startceva, SK}, title = {Sex hormone-dependent host-microbiome interactions and cardiovascular risk (XCVD): design of a longitudinal multi-omics cohort study.}, journal = {BMJ open}, volume = {15}, number = {1}, pages = {e087982}, pmid = {39788783}, issn = {2044-6055}, mesh = {Humans ; *Cardiovascular Diseases/microbiology/epidemiology ; Longitudinal Studies ; Male ; Female ; *Gonadal Steroid Hormones/metabolism/blood ; *Gastrointestinal Microbiome ; Host Microbial Interactions ; Transgender Persons ; Research Design ; Heart Disease Risk Factors ; Adult ; Sex Reassignment Procedures ; Multiomics ; }, abstract = {INTRODUCTION: Cardiovascular diseases (CVDs) present differently in women and men, influenced by host-microbiome interactions. The roles of sex hormones in CVD outcomes and gut microbiome in modifying these effects are poorly understood. The XCVD study examines gut microbiome mediation of sex hormone effects on CVD risk markers by observing transgender participants undergoing gender-affirming hormone therapy (GAHT), with findings expected to extrapolate to cisgender populations.<br><br>METHODS AND ANALYSES: This observational, longitudinal cohort study includes baseline, 1- and 2-year follow-ups with transgender participants beginning GAHT. It involves comprehensive phenotyping and microbiome genotyping, integrating computational analyses of high-dimensional data. Microbial diversity will be assessed using gut, skin, and oral samples via 16S rRNA and shotgun metagenomic sequencing of gut samples. Blood measurements will include sex hormones, CVD risk markers, cardiometabolic parameters, cytokines, and immune cell counts. Hair samples will be analysed for cortisol. Participants will complete online questionnaires on physical activity, mental health, stress, quality of life, fatigue, sleep, pain, and gender dysphoria, tracking medication use and diet to control for confounders. Statistical analyses will integrate phenomic, lifestyle, and multi-omic data to model health effects, testing gut microbiome mediation of CVD risk as the endocrine environment shifts between that typical for cisgender men to women and vice versa.<br><br>ETHICS AND DISSEMINATION: The study adheres to Good Clinical Practice and the Declaration of Helsinki. The protocol was approved by the Charit&#xe9; Ethical Committee (EA1/339/21). Signed informed consent will be obtained. Results will be published in peer-reviewed journals and conferences and shared as accessible summaries for participants, community groups, and the public, with participants able to view their data securely after public and patient involvement review for accessibility.<br><br>TRIAL REGISTRATION NUMBER: The XCVD study was registered on ClinicalTrials.gov (NCT05334888) as 'Sex-differential host-microbiome CVD risk - a longitudinal cohort approach (XCVD)" on 4 April 2022. Data set link can be found at https://classic.<br><br>CLINICALTRIALS: gov/ct2/show/NCT05334888.}, }
@article {pmid39786931, year = {2025}, author = {Ni, B and Xiao, L and Lin, D and Zhang, TL and Zhang, Q and Liu, Y and Chen, Q and Zhu, D and Qian, H and Rillig, MC and Zhu, YG}, title = {Increasing pesticide diversity impairs soil microbial functions.}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {122}, number = {2}, pages = {e2419917122}, pmid = {39786931}, issn = {1091-6490}, support = {41991332//MOST | National Natural Science Foundation of China (NSFC)/ ; 42307027//MOST | National Natural Science Foundation of China (NSFC)/ ; 42222701//MOST | National Natural Science Foundation of China (NSFC)/ ; 2022A-163-G//Ningbo Yongjiang Talent Project/ ; 2021-DST-004//Ningbo S&amp;T project/ ; 2023321//Youth Innovation Promotion Association, Chinese Academy of Sciences/ ; }, mesh = {*Soil Microbiology ; *Pesticides ; *Bacteria/genetics/metabolism/classification/drug effects ; *Soil/chemistry ; *Fertilizers ; *Nitrogen/metabolism ; Phosphorus/metabolism ; Carbon/metabolism ; Sulfur/metabolism ; Agriculture/methods ; Metagenomics/methods ; Microbiota/drug effects ; }, abstract = {Pesticide application is essential for stabilizing agricultural production. However, the effects of increasing pesticide diversity on soil microbial functions remain unclear, particularly under varying nitrogen (N) fertilizer management practices. In this study, we investigated the stochasticity of soil microbes and multitrophic networks through amplicon sequencing, assessed soil community functions related to carbon (C), N, phosphorus (P), and sulfur (S) cycling, and characterized the dominant bacterial life history strategies via metagenomics along a gradient of increasing pesticide diversity under two N addition levels. Our findings show that higher pesticide diversity enriches the abundance of bacterial specialists and opportunists capable of degrading or resisting pesticides, reducing the proportion of bacterial generalists in the absence of N addition. These shifts can complicate multitrophic microbial networks. Under increased pesticide diversity, selective pressure may drive bacteria to streamline their average genome size to conserve energy while enhancing C, N, P, and S metabolic capacities, thus accelerating soil nutrient loss. In comparison, N addition was found to reduce bacterial niche differentiation at higher pesticide diversity, mitigating the impacts of network complexity and functional traits associated with pesticide diversity, ultimately alleviating soil nutrient loss. Our results reveal the contrasting impacts of pesticide diversity on microbial functions under different N input scenarios and emphasize that strategic N fertilizer management can mitigate the ecological effects of pesticide use in agricultural systems.}, }
@article {pmid39781512, year = {2025}, author = {Sato, N and Katayama, K and Miyaoka, D and Uematsu, M and Saito, A and Fujimoto, K and Uematsu, S and Imoto, S}, title = {stana: an R package for metagenotyping analysis and interactive application based on clinical data.}, journal = {NAR genomics and bioinformatics}, volume = {7}, number = {1}, pages = {lqae191}, pmid = {39781512}, issn = {2631-9268}, mesh = {Humans ; *Software ; *Gastrointestinal Microbiome/genetics ; Crohn Disease/genetics/microbiology ; Metagenomics/methods ; Parkinson Disease/genetics ; Kidney Failure, Chronic/genetics ; Metagenome/genetics ; }, abstract = {Metagenotyping of metagenomic data has recently attracted increasing attention as it resolves intraspecies diversity by identifying single nucleotide variants. Furthermore, gene copy number analysis within species provides a deeper understanding of metabolic functions in microbial communities. However, a platform for examining metagenotyping results based on relevant grouping data is lacking. Here, we have developed the R package, stana, for the processing and analysis of metagenotyping results. The package consists of modules for preprocessing, statistical analysis, functional analysis and visualization. An interactive analysis environment for exploring the metagenotyping results was also developed and publicly released with over 1000 publicly available metagenome samples related to human diseases. Three examples exploring the relationship between the metagenotypes of the gut microbiome and human diseases are presented-end-stage renal disease, Crohn's disease and Parkinson's disease. The results suggest that stana facilitated the confirmation of the original study's findings and the generation of a new hypothesis. The GitHub repository for the package is available at https://github.com/noriakis/stana.}, }
@article {pmid39779932, year = {2025}, author = {Wei, Y and Zhu, Y and Yang, L and Chen, C and Yue, M and Mao, Z and Wang, Y and Li, Q and Li, Y and Lv, J and Xue, W}, title = {Effects of oil pollution on the growth and rhizosphere microbial community of Calamagrostis epigejos.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {1278}, pmid = {39779932}, issn = {2045-2322}, support = {22NYYF029//Xi'an Agricultural Technology R&amp;D Projects/ ; S2024-JC-YB-2574//Natural Science Foundation of Science and Technology Department of Shaanxi Province/ ; 2020ZDLSF06-01//Natural Science Foundation of Science and Technology Department of Shaanxi Province/ ; 2021K-25//Strategic Reserve Talent Training Program of Shaanxi Academy of Sciences/ ; 2023JH-NJGG-0167//Xi'an Science Technology Bureau Fund/ ; KRDL K6-2207039//the Project of the First Investigation of Wild Plants Resources in Xi'an/ ; }, mesh = {*Soil Microbiology ; *Rhizosphere ; *Fungi/genetics ; *Bacteria/genetics/classification ; *Archaea/genetics/growth &amp; development/metabolism ; Petroleum Pollution/adverse effects ; Petroleum ; Microbiota/drug effects ; Soil Pollutants ; }, abstract = {Bacteria, fungi, archaea, and viruses are reflective organisms that indicate soil health. Investigating the impact of crude oil pollution on the community structure and interactions among bacteria, fungi, archaea, and viruses in Calamagrostis epigejos soil can provide theoretical support for remediating crude oil pollution in Calamagrostis epigejos ecosystems. In this study, Calamagrostis epigejos was selected as the research subject and subjected to different levels of crude oil addition (0 kg/hm[2], 10 kg/hm[2], 40 kg/hm[2]). Metagenomic sequencing technology was employed to analyze the community structure and diversity of soil bacteria, fungi, archaea, and viruses. Additionally, molecular ecological network analysis was integrated to explore species interactions and ecosystem stability within these microbial communities. The functional profiles of soil microorganisms were elucidated based on data from the KEGG database. Results demonstrated a significant increase in petroleum hydrocarbon content, polyphenol oxidase activity, hydrogen peroxide enzyme activity, and acid phosphatase activity upon crude oil addition, while β-glucosidase content, fiber disaccharide hydrolase content, and tiller number decreased (P < 0.05). Proteobacteria and Actinobacteria were identified as dominant bacterial phyla; Ascomycota, Basidiomycota, and Mucoromycota were found to be dominant fungal phyla; Thaumarchaeota emerged as a dominant archaeal phylum; and Uroviricota represented a dominant viral phylum. The diversity of soil bacterial, fungal, archaeal, and viral communities increased with higher amounts of added crude oil. Ecological network analysis revealed a robust collaborative relationship among bacterial, fungal, archaeal, and viral community species in the control treatment (CK), while strong competitive relationships were observed among these species in the treatments with 10% (F10) and 40% (F40) crude oil concentrations. Structural equation modeling analysis indicated significant positive correlations between fungal community, viral community, enzyme activity, and plant growth; conversely, bacterial and archaeal communities showed significant negative correlations with plant growth (P < 0.05). Correlation analysis identified acid phosphatase as the primary environmental factor influencing soil microbial function. Acid phosphatase levels along with tiller number, aboveground biomass, and petroleum hydrocarbons significantly influenced the fungal community (P < 0.05), while underground biomass had a significant impact on the archaeal community (P < 0.05). Acid phosphatase levels along with cellulose-hydrolyzing enzymes, tiller number, and petroleum hydrocarbons exhibited significant effects on the viral community (P < 0.05). This study investigated variations in bacterial, fungal, archaeal, and viral communities under different crude oil concentrations as well as their driving factors, providing a theoretical foundation for evaluating Calamagrostis epigejos' potential to remediate crude oil pollution.}, }
@article {pmid39779925, year = {2025}, author = {He, X and Hu, M and Xu, Y and Xia, F and Tan, Y and Wang, Y and Xiang, H and Wu, H and Ji, T and Xu, Q and Wang, L and Huang, Z and Sun, M and Wan, Y and Cui, P and Liang, S and Pan, Y and Xiao, S and He, Y and Song, R and Yan, J and Quan, X and Wei, Y and Hong, C and Liao, W and Li, F and El-Omar, E and Chen, J and Qi, X and Gao, J and Zhou, H}, title = {The gut-brain axis underlying hepatic encephalopathy in liver cirrhosis.}, journal = {Nature medicine}, volume = {31}, number = {2}, pages = {627-638}, pmid = {39779925}, issn = {1546-170X}, support = {82372305//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Hepatic Encephalopathy/microbiology/metabolism/pathology/etiology ; Animals ; *Liver Cirrhosis/microbiology/complications/metabolism ; Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Mice ; *Brain/metabolism/pathology ; Male ; Aromatic-L-Amino-Acid Decarboxylases/genetics/metabolism ; Liver/metabolism/pathology ; Fecal Microbiota Transplantation ; Female ; Dysbiosis/microbiology ; *Brain-Gut Axis ; Middle Aged ; Monoamine Oxidase/metabolism ; Mice, Inbred C57BL ; }, abstract = {Up to 50-70% of patients with liver cirrhosis develop hepatic encephalopathy (HE), which is closely related to gut microbiota dysbiosis, with an unclear mechanism. Here, by constructing gut-brain modules to assess bacterial neurotoxins from metagenomic datasets, we found that phenylalanine decarboxylase (PDC) genes, mainly from Ruminococcus gnavus, increased approximately tenfold in patients with cirrhosis and higher in patients with HE. Cirrhotic, not healthy, mice colonized with R. gnavus showed brain phenylethylamine (PEA) accumulation, along with memory impairment, symmetrical tremors and cortex-specific neuron loss, typically found in patients with HE. This accumulation of PEA was primarily driven by decreased monoamine oxidase-B activity in both the liver and serum due to cirrhosis. Targeting PDC or PEA reversed the neurological symptoms induced by R. gnavus. Furthermore, fecal microbiota transplantation from patients with HE to germ-free cirrhotic mice replicated these symptoms and further corroborated the efficacy of targeting PDC or PEA. Clinically, high baseline PEA levels were linked to a sevenfold increased risk of HE after intrahepatic portosystemic shunt procedures. Our findings expand the understanding of the gut-liver-brain axis and identify a promising therapeutic and predictive target for HE.}, }
@article {pmid39779716, year = {2025}, author = {Gałęcka, I and Rychlik, A and Całka, J}, title = {Influence of selected dosages of plastic microparticles on the porcine fecal microbiome.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {1269}, pmid = {39779716}, issn = {2045-2322}, support = {2020/37/N/NZ7/01383//Narodowe Centrum Nauki/ ; The Regional Initiative of Excellence Program//Minister of Science Poland/ ; }, mesh = {Animals ; Swine ; *Feces/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Microplastics/toxicity ; Female ; Plastics ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Studies conducted so far have shown that nano- and microplastic may disturb the intestinal microenvironment by interacting with the intestinal epithelium and the gut microbiota. Depending on the research model used, the effect on the microbiome is different-an increase or decrease in selected taxa resulting in the development of dysbiosis. Dysbiosis may be associated with intestinal inflammation, development of mental disorders or diabetes. The aim of the study was to analyze the intestinal microbiome in 15 gilts divided into 3 research groups (n = 5; control group, receiving micropartices at a dose 0.1 g/day (LD) and 1 g/day (HD)). Feaces were collected before and after 28 days of exposure to PET microplastics. The analysis of the intestinal microbiome was performed using next-generation sequencing. Alpha and beta diversity indices were compared, showing, that repetition affected only the abundance indices in the control and LD groups, but not in the HD group. The relationships between the number of reads at the phylum, genus and species level and the microplastic dose were calculated using statistical methods (r-Pearson correlation, generalized regression model, analysis of variance). The statistical analysis revealed, that populations of Family XIII AD3011 group, Coprococcus, V9D2013 group, UCG-010 and Sphaerochaeta increased with increasing MP-PET dose. The above-mentioned taxa are mainly responsible for the production of short-chain fatty acids (SCFA). It may be assumed, that SCFA are one of the mechanisms involved in the response to oral exposure to MP-PET.}, }
@article {pmid39779118, year = {2025}, author = {Wang, C and Bin, Z and Wang, L and Zhu, G and Tang, S and Chen, Y and Xiao, D and Guo, X}, title = {Metagenomic and metabolomic profiling analyses to unravel the formation mechanism of n-propanol during the first and second round of Jiangxiangxing Baijiu fermentation.}, journal = {Food research international (Ottawa, Ont.)}, volume = {200}, number = {}, pages = {115459}, doi = {10.1016/j.foodres.2024.115459}, pmid = {39779118}, issn = {1873-7145}, mesh = {*Fermentation ; *Metabolomics/methods ; *1-Propanol/metabolism ; *Metagenomics/methods ; Lactobacillus/metabolism/genetics ; Alcoholic Beverages/microbiology ; Pichia/metabolism/genetics ; Saccharomyces cerevisiae/metabolism/genetics ; Food Microbiology ; Microbiota ; }, abstract = {N-propanol is one of the higher alcohols, a moderate amount of n-propanol is beneficial for the harmony of the liquor body, whereas excessive or repeated intake will lead to discomfort and pose significant harm to human health. In actual production process of Jiangxiangxing Baijiu, the n-propanol content of the base baijiu in first round (FR) is far higher than that of second round (SR). Nevertheless, the formation mechanism and the key n-propanol producing microbials remain unclear and this limits the quality control of baijiu fermentation. Here, we combined metagenomics and metabolomics to verify the biosynthesis pathway of n-propanol and to identify characteristic microorganisms in FR and SR. The results showed that the preliminary period of pit fermentation was critical for the accumulation of n-propanol. FR was enriched in Lactobacillus plantarum, Lactobacillus ponits, Lactobacillus brevis and Lactobacillus panis, while it was harbored greater abundances of Pichia kudriazevii, Saccharomyces cerevisiae and Lactobacillus acetotolerans in SR. Function analysis combined with KEGG providing comprehensive evidence for the main synthetic pathways of n-propanol in Jiangxiangxing baijiu, and L. panis was key microbial. In addition, the experiments of inoculating L. panis and L. acetotolerans in situ indicated L. panis was mainly responsible for n-propanol production while L. acetotolerans not conducive to the production of n-propanol. Besides, the bioturbation effect on microbiota and flavor compounds were also analyzed. These results are useful for elucidating the mechanism of flavor formation in baijiu fermentation and promoting the further application of bioturbation technology in the traditional fermentation industry.}, }
@article {pmid39778648, year = {2025}, author = {Bellanco, A and Requena, T and Martínez-Cuesta, MC}, title = {Polysorbate 80 and carboxymethylcellulose: A different impact on epithelial integrity when interacting with the microbiome.}, journal = {Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association}, volume = {196}, number = {}, pages = {115236}, doi = {10.1016/j.fct.2025.115236}, pmid = {39778648}, issn = {1873-6351}, mesh = {*Polysorbates/pharmacology ; *Carboxymethylcellulose Sodium/chemistry ; *Gastrointestinal Microbiome/drug effects ; Humans ; Emulsifying Agents ; Bacteria/drug effects/classification/genetics/metabolism ; }, abstract = {The consumption of dietary emulsifiers, including polysorbate 80 (P80) and sodium carboxymethylcellulose (CMC), has raised safety concerns due to its interaction with the intestinal microbiome. This study demonstrated that increasing concentrations of P80 and CMC added to a dynamic four-stage gut microbiota model (BFBL gut simulator) altered the microbiome composition and impacted epithelial integrity in a dose-dependent manner. 16S rDNA amplicon-based metagenomics analysis revealed that these emulsifiers increased microbial groups with proinflammatory capacities while decreasing microbial taxa known to enhance barrier function. Increasing doses of P80 significantly decreased Bacteroides dorei and Akkermansia, taxa associated with anti-inflammatory potential, while increasing doses of CMC were linked to a higher abundance of Ruminococcus torques and Hungatella, which negatively impact barrier function. Both emulsifiers displayed a different impact on epithelial integrity when interacting with the microbiome. On one hand, supernatants from the BFBL simulator fed with P80 disrupted epithelial integrity to a lesser extent than the additive alone. On the other hand, both the microbiota and the supernatants from the BFBL simulator fed with CMC diminished the epithelial integrity, though the additive itself did not. These findings highlight the need to incorporate the gut microbiome in the risk assessment of these additives.}, }
@article {pmid39778631, year = {2025}, author = {Harriman, D and Ng, A and Bronowski, M and Kazakov, H and Nguan, C and Dang, T and Sherwood, K and Miller, A and Lange, D}, title = {Characterizing the urobiome and associated metabolic profiles during acute rejection in renal transplant patients: A pilot study.}, journal = {Transplant immunology}, volume = {89}, number = {}, pages = {102170}, doi = {10.1016/j.trim.2024.102170}, pmid = {39778631}, issn = {1878-5492}, mesh = {Humans ; *Kidney Transplantation ; *Graft Rejection/immunology/microbiology/urine ; Pilot Projects ; Female ; Male ; Middle Aged ; Adult ; Acute Disease ; *Microbiota ; Metabolome ; Aged ; }, abstract = {Characteristic alterations in the urinary microbiome, or urobiome, are associated with renal transplant pathology. To date, there has been no direct study of the urobiome during acute allograft rejection. The goal of this study was to determine if unique urobiome alterations are present during acute rejection in renal transplant recipients. We performed shotgun metagenomic sequencing of 32 mid-stream urine samples obtained from 15 transplant recipients pre-transplant, 1- and 3-months post-transplant, and at time of rejection discovered with for-cause biopsy. Within individuals, there was a 40-60 % difference in urobiome composition from pre-to-post-transplant in both rejectors and non-rejectors. The taxa Ureaplasma was enriched in rejectors compared to non-rejectors. However, a greater number of microbial genes were enriched in non-rejectors compared to rejectors, except for genes associated with tetracycline resistance, the lysophosphatidic acid synthesis pathway, and tryptophanyl-tRNA synthetase. Together, our findings suggest that the urobiome is significantly altered post-transplant with certain taxa and/or microbial genes potentially associated with acute allograft rejection/inflammation.}, }
@article {pmid39778056, year = {2025}, author = {Silva, JK and Hervé, V and Mies, US and Platt, K and Brune, A}, title = {A Novel Lineage of Endosymbiotic Actinomycetales: Genome Reduction and Acquisition of New Functions in Bifidobacteriaceae Associated With Termite Gut Flagellates.}, journal = {Environmental microbiology}, volume = {27}, number = {1}, pages = {e70010}, pmid = {39778056}, issn = {1462-2920}, support = {//Max-Planck-Gesellschaft/ ; }, mesh = {*Symbiosis ; Animals ; *Isoptera/microbiology ; *Genome, Bacterial ; *RNA, Ribosomal, 16S/genetics ; *Phylogeny ; *Actinomycetales/genetics/metabolism ; Gene Transfer, Horizontal ; Gastrointestinal Microbiome ; Gastrointestinal Tract/microbiology/parasitology ; Metagenome ; }, abstract = {Cellulolytic flagellates are essential for the symbiotic digestion of lignocellulose in the gut of lower termites. Most species are associated with host-specific consortia of bacterial symbionts from various phyla. 16S rRNA-based diversity studies and taxon-specific fluorescence in situ hybridization revealed a termite-specific clade of Actinomycetales that colonise the cytoplasm of Trichonympha spp. and other gut flagellates, representing the only known case of intracellular Actinomycetota in protists. Comparative analysis of eleven metagenome-assembled genomes from lower termites allowed us to describe them as new genera of Bifidobacteriaceae. Like the previously investigated Candidatus Ancillula trichonymphae, they ferment sugars via the bifidobacterium shunt but, unlike their free-living relatives, experienced significant genome erosion. Additionally, they acquired new functions by horizontal gene transfer from other gut bacteria, including the capacity to produce hydrogen. Members of the genus Ancillula (average genome size 1.56 ± 0.2 Mbp) retained most pathways for the synthesis of amino acids, including a threonine/serine exporter, providing concrete evidence for the basis of the mutualistic relationship with their host. By contrast, Opitulatrix species (1.23 ± 0.1 Mbp) lost most of their biosynthetic capacities, indicating that an originally mutualistic symbiosis is on the decline.}, }
@article {pmid39777846, year = {2025}, author = {Liu, R and He, X and Ren, G and Li, DW and Zhao, M and Lehtovirta-Morley, L and Todd, JD and Zhang, XH and Liu, J}, title = {Niche Partitioning and Intraspecific Variation of Thaumarchaeota in Deep Ocean Sediments.}, journal = {Environmental microbiology}, volume = {27}, number = {1}, pages = {e70018}, doi = {10.1111/1462-2920.70018}, pmid = {39777846}, issn = {1462-2920}, support = {41976101//National Natural Science Foundation of China/ ; 92051115//National Natural Science Foundation of China/ ; 92251303//National Natural Science Foundation of China/ ; 202141009//Fundamental Research Funds for the Central Universities/ ; 202172002//Fundamental Research Funds for the Central Universities/ ; 2022QNLM030004-3//Laoshan Laboratory/ ; LSKJ202203206//Laoshan Laboratory/ ; ZR2022YQ38//Natural Science Foundation of Shandong Province/ ; ZR2024JQ006//Natural Science Foundation of Shandong Province/ ; }, mesh = {*Geologic Sediments/microbiology ; *Archaea/genetics/classification ; *Phylogeny ; Oceans and Seas ; Metagenome ; Ecosystem ; Seawater/microbiology ; Metagenomics ; Ammonia/metabolism ; Genome, Archaeal ; }, abstract = {Deep-sea sediments contain a large number of Thaumarchaeota that are phylogenetically distinct from their pelagic counterparts. However, their ecology and evolutionary adaptations are not well understood. Metagenomic analyses were conducted on samples from various depths of a 750-cm sediment core collected from the Mariana Trench Challenger Deep. The abundance of Thaumarchaeota and archaeal amoA generally decreased with depth, except for an unexpected peak midway through the core. The thaumarchaeotal metagenome-assembled genomes were classified into diverse phylogenetic clusters associated with amoA-NP-γ, amoA-NP-θ, and amoA-NP-δ of ammonia-oxidising Thaumarchaeota and non-ammonia-oxidising lineages. The most abundant group was within amoA-NP-γ, which is usually found in coastal and shallow habitats, indicating potential niche expansion from marine shallow to hadal environments. This benthic group showed within-species genomic variations compared to the previously identified Hadal water group, suggesting microdiversification of hadal Thaumarchaeota along with niche separation between benthic and pelagic environments. Evolutionary adaptations associated with the benthic-to-pelagic transition included reduced genome size, loss of motility/cell adhesion, altered energy metabolism, and different mechanisms for substrate acquisition and regulation (e.g., ammonium). These findings offer new insights into the evolution of hadal Thaumarchaeota and demonstrate, for the first time, intraspecies-level genomic variation in Thaumarchaeota related to the benthic-versus-pelagic niche partitioning in the deep ocean.}, }
@article {pmid39777550, year = {2025}, author = {Byers, AK and Wakelin, SA and Condron, L and Black, A}, title = {Land Use Change Disrupts the Network Complexity and Stability of Soil Microbial Carbon Cycling Genes Across an Agricultural Mosaic Landscape.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {167}, pmid = {39777550}, issn = {1432-184X}, mesh = {*Soil Microbiology ; *Carbon Cycle ; New Zealand ; *Agriculture ; *Soil/chemistry ; *Microbiota ; *Bacteria/genetics/classification/metabolism ; Carbon/metabolism ; Gene Regulatory Networks ; Forests ; Ecosystem ; }, abstract = {To understand the effects of agricultural land use change and management on soil carbon (C) cycling, it is crucial to examine how these changes can influence microbial soil C cycling. Network analysis can offer insights into the structure, complexity, and stability of the soil microbiome in response to environmental disturbances, including land use change. Using SparCC-based co-occurrence networks, we studied how land use change impacts the connectivity, complexity, and stability of microbial C-cycling gene networks across an agricultural mosaic landscape in Canterbury, New Zealand. The most densely connected networks were found in land uses that were under the most intensive agricultural management, or under naturally regenerating vegetation. The microbial C-cycling gene networks from both land uses presented high network connectivity, low modularity, and a low proportion of negative gene interactions. In contrast, microbial C-cycling genes from native forests, which had the most stable and undisturbed plant cover, had the lowest network connectivity, highest modularity, and a greater proportion of negative gene interactions. Although the differences in total soil C content between land uses were small, the large effects of land use on the network structure of microbial C-cycling genes may have important implications for long-term microbial soil C cycling. Furthermore, this research highlights the value of using microbial network analysis to study the metabolic gene interactions shaping the functional structure of soil microbial communities in a manner not typically captured by more traditional forms of microbial diversity analysis.}, }
@article {pmid39774426, year = {2024}, author = {Segura, D and Sharma, D and Espin-Garcia, O}, title = {Comparing subsampling strategies for metagenomic analysis in microbial studies using amplicon sequence variants versus operational taxonomic units.}, journal = {PloS one}, volume = {19}, number = {12}, pages = {e0315720}, pmid = {39774426}, issn = {1932-6203}, mesh = {Humans ; *Metagenomics/methods ; *RNA, Ribosomal, 16S/genetics ; Gastrointestinal Microbiome/genetics ; Microbiota/genetics ; Infant ; Sequence Analysis, DNA/methods ; Bacteria/genetics/classification ; Metagenome/genetics ; }, abstract = {The microbiome is increasingly regarded as a key component of human health, and analysis of microbiome data can aid in the development of precision medicine. Due to the high cost of shotgun metagenomic sequencing (SM-seq), microbiome analyses can be done cost-effectively in two phases: Phase 1-sequencing of 16S ribosomal RNA, and Phase 2-SM-seq of an informative subsample. Existing research suggests strategies to select the subsample based on biological diversity and dissimilarity metrics calculated using operational taxonomic units (OTUs). However, the microbiome field has progressed towards amplicon sequencing variants (ASVs), as they provide more precise microbe identification and sample diversity information. The aim of this work is to compare the subsampling strategies for two-phase metagenomic studies when using ASVs instead of OTUs, and to propose data driven strategies for subsample selection through dimension reduction techniques. We used 199 samples of infant-gut microbiome data from the DIABIMMUNE project to generate ASVs and OTUs, then generated subsamples based on five existing biologically driven subsampling methods and two data driven methods. Linear discriminant analysis Effect Size (LEfSe) was used to assess differential representation of taxa between the subsamples and the overall sample. The use of ASVs showed a 50-93% agreement in the subsample selection with the use of OTUs for the subsampling methods evaluated, and showed a similar bacterial representation across all methods. Although sampling using ASVs and OTUs typically lead to similar results for each subsample, ASVs had more clades that differed in expression levels between allergic and non-allergic individuals across all sample sizes compared to OTUs, and led to more biomarkers discovered at Phase 2-SM-seq level.}, }
@article {pmid39772525, year = {2025}, author = {Yum, SJ and Yu, SY and Kim, SM and Jeong, HG}, title = {Antibiotic Resistance Genes and Microbiota in Brassica oleracea var. acephala Cultivated in South Korea: Potential for Resistance Transmission.}, journal = {Journal of agricultural and food chemistry}, volume = {73}, number = {3}, pages = {2156-2166}, pmid = {39772525}, issn = {1520-5118}, mesh = {*Brassica/microbiology/growth &amp; development/genetics ; *Bacteria/genetics/drug effects/isolation &amp; purification/classification ; *Microbiota ; Republic of Korea ; Anti-Bacterial Agents/pharmacology ; RNA, Ribosomal, 16S/genetics ; *Drug Resistance, Bacterial ; Bacterial Proteins/genetics/metabolism ; }, abstract = {Antimicrobial resistance (AMR) poses a critical global public health challenge. This study investigates the microbiome of Brassica oleracea var. acephala (kale) to evaluate the role of food production systems, particularly plant-derived foods, in AMR dissemination. Using 16S rRNA gene sequencing and metagenomic shotgun sequencing, we analyzed microbial diversity and antimicrobial resistance genes (ARGs) in kale samples. Results showed significant regional differences in microbiota composition and ARG distribution, with traditional fertilizer use linked to higher ARG prevalence in coliform bacteria compared to farms using other fertilization methods. Additionally, we confirmed ARG transfer potential by Klebsiella pneumoniae within coliform populations. Storage conditions notably affected microbial dynamics, with higher temperatures promoting K. pneumoniae growth in washed samples. These findings revealed the importance of AMR research in plant-derived foods and highlight the need for improved agricultural practices to mitigate the risks associated with high ARG abundance in coliform bacteria.}, }
@article {pmid39770890, year = {2024}, author = {Wells, RK and Torres, A and Mau, MK and Maunakea, AK}, title = {Racial-Ethnic Disparities of Obesity Require Community Context-Specific Biomedical Research for Native Hawaiians and Other Pacific Islanders.}, journal = {Nutrients}, volume = {16}, number = {24}, pages = {}, pmid = {39770890}, issn = {2072-6643}, support = {P20GM139753//NIH-NIGMS/ ; R01MD016593//NIH-NIMHD/ ; R56MD014630//NIH-NIMHD/ ; UG03HL169657//NIH-NHLBI/ ; }, mesh = {Humans ; *Biomedical Research ; Gastrointestinal Microbiome ; Hawaii/epidemiology ; Health Status Disparities ; *Native Hawaiian or Pacific Islander ; *Obesity/ethnology ; Pacific Island People ; }, abstract = {Compared to the general population of Hawai'i, Native Hawaiians and Other Pacific Islanders (NHPI) shoulder a disproportionately high risk for obesity-related cardiometabolic disorders, such as type 2 diabetes and cardiovascular disease. The gut microbiome is an area of rapid research interest for its role in regulating adjacent metabolic pathways, offering novel opportunities to better understand the etiology of these health disparities. Obesity and the gut microbiome are influenced by regional, racial-ethnic, and community-specific factors, limiting the generalizability of current literature for understudied populations. Additionally, anthropometric and directly measured obesity indices are variably predictive of adiposity and metabolic health risk in this diverse population. Thus, further NHPI-inclusive research is required to adequately characterize community-specific factors in the context of obesity-related disease etiology. Culturally responsible research ethics and scientific communication are crucial to conducting such research, especially among indigenous and understudied populations. In this review, we explore these limitations in current literature, emphasizing the urgent need for NHPI-inclusive research to assess community-specific factors accurately. Such accuracy in Indigenous health research may ensure that findings relevant to individual or public health recommendations and/or policies are meaningful to the communities such research aims to serve.}, }
@article {pmid39770772, year = {2024}, author = {Long, Y and Zhang, X and Peng, X and Yang, H and Ni, H and Zou, L and Long, Z}, title = {Metagenomic Analysis Revealing the Impact of Water Contents on the Composition of Soil Microbial Communities and the Distribution of Major Ecological Functional Genes in Poyang Lake Wetland Soil.}, journal = {Microorganisms}, volume = {12}, number = {12}, pages = {}, pmid = {39770772}, issn = {2076-2607}, support = {31960015//The National Natural Science Foundation of China/ ; 20192BAB204001//Natural Science Foundation of Jiangxi Province, China/ ; }, abstract = {Poyang Lake is the largest freshwater lake in China, which boasts unique hydrological conditions and rich biodiversity. In this study, metagenomics technology was used to sequence the microbial genome of soil samples S1 (sedimentary), S2 (semi-submerged), and S3 (arid) with different water content from the Poyang Lake wetland; the results indicate that the three samples have different physicochemical characteristics and their microbial community structure and functional gene distribution are also different, resulting in separate ecological functions. The abundance of typical ANME archaea Candidatus Menthanoperedens and the high abundance of mcrA in S1 mutually demonstrate prominent roles in the methane anaerobic oxidation pathway during the methane cycle. In S2, the advantageous bacterial genus Nitrospira with ammonia oxidation function is validated by a large number of nitrification functional genes (amoA, hao, nxrA), manifesting in that it plays a monumental role in nitrification in the nitrogen cycle. In S3, the dominant bacterial genus Nocardioides confirms a multitude of antibiotic resistance genes, indicating their crucial role in resistance and their emphatic research value for microbial resistance issues. The results above have preliminarily proved the role of soil microbial communities as indicators predicting wetland ecological functions, which will help to better develop plans for restoring ecological balance and addressing climate change.}, }
@article {pmid39770743, year = {2024}, author = {Peng, X and Li, S and Dou, W and Li, M and Gontcharov, AA and Peng, Z and Qi, B and Wang, Q and Li, Y}, title = {Metagenomic Insight into the Associated Microbiome in Plasmodia of Myxomycetes.}, journal = {Microorganisms}, volume = {12}, number = {12}, pages = {}, pmid = {39770743}, issn = {2076-2607}, support = {31770011//National Natural Science Foundation of China/ ; }, abstract = {During the trophic period of myxomycetes, the plasmodia of myxomycetes can perform crawling feeding and phagocytosis of bacteria, fungi, and organic matter. Culture-based studies have suggested that plasmodia are associated with one or several species of bacteria; however, by amplicon sequencing, it was shown that up to 31-52 bacteria species could be detected in one myxomycete, suggesting that the bacterial diversity associated with myxomycetes was likely to be underestimated. To fill this gap and characterize myxomycetes' microbiota and functional traits, the diversity and functional characteristics of microbiota associated with the plasmodia of six myxomycetes species were investigated by metagenomic sequencing. The results indicate that the plasmodia harbored diverse microbial communities, including eukaryotes, viruses, archaea, and the dominant bacteria. The associated microbiomes represented more than 22.27% of the plasmodia genome, suggesting that these microbes may not merely be parasitic or present as food but rather may play functional roles within the plasmodium. The six myxomycetes contained similar bacteria, but the bacteria community compositions in each myxomycete were species-specific. Functional analysis revealed a highly conserved microbial functional profile across the six plasmodia, suggesting they may serve a specific function for the myxomycetes. While the host-specific selection may shape the microbial community compositions within plasmodia, functional redundancy ensures functional stability across different myxomycetes.}, }
@article {pmid39769095, year = {2024}, author = {Mohan, B and Majeed, A and Thingujam, D and Burton, SS and Cowart, KE and Pajerowska-Mukhtar, KM and Mukhtar, MS}, title = {Amplicon Sequencing Analysis of Submerged Plant Microbiome Diversity and Screening for ACC Deaminase Production by Microbes.}, journal = {International journal of molecular sciences}, volume = {25}, number = {24}, pages = {}, pmid = {39769095}, issn = {1422-0067}, support = {IOS-2038872//National Science Foundation/ ; 2418230//National Science Foundation/ ; }, mesh = {*Carbon-Carbon Lyases/genetics/metabolism ; *Microbiota/genetics ; *Plants/microbiology ; Bacteria/genetics/classification/enzymology ; Metagenomics/methods ; Phylogeny ; Biodiversity ; }, abstract = {Submerged plants can thrive entirely underwater, playing a crucial role in maintaining water quality, supporting aquatic organisms, and enhancing sediment stability. However, they face multiple challenges, including reduced light availability, fluctuating water conditions, and limited nutrient access. Despite these stresses, submerged plants demonstrate remarkable resilience through physiological and biochemical adaptations. Additionally, their interactions with microbial communities are increasingly recognized as pivotal in mitigating these environmental stresses. Understanding the diversity of these microbial communities is crucial for comprehending the complex interactions between submerged plants and their environments. This research aims to identify and screen microbes from submerged plant samples capable of producing 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase and to explore microbial diversity through metagenomic analysis. Microbes were isolated and screened for ACC deaminase production, and metagenomic techniques, including co-occurrence network analysis, were used to examine microbial diversity and interactions within the communities. ACC deaminase-producing microbes can significantly enhance plant metabolism under stress conditions. The identification of the culturable bacteria revealed that most of these microbes belong to the genera Pseudomonas, Bacillus, and Acinetobacter. A total of 177 microbial strains were cultured, with molecular identification revealing 79 reductant, 86 non-reductant, and 12 uncultured strains. Among 162 samples screened for ACC deaminase activity, 50 tested positive. To further understand microbial dynamics, samples were collected from both natural sources and artificial pond reservoirs to assess the impact of the location on flood-associated microbiomes in submerged plants. Metagenomic analysis was conducted on both the epiphytic and endophytic samples. By exploring the overall composition and dynamics of microbial communities associated with submerged plants, this research seeks to deepen our understanding of plant-microbe interactions in aquatic environments. The microbial screening helped to identify the diverse microbes associated with ACC deaminase activity in submerged plants and amplicon sequencing analysis paved the way towards identifying the impact of the location in shaping the microbiome and the diversity associated with endophytic and epiphytic microbes. Co-occurrence network analysis further highlighted the intricate interactions within these microbial communities. Notably, ACC deaminase activity was observed in plant-associated microbes across different locations, with distinct variations between epiphytic and endophytic populations as identified through co-occurrence network analysis.}, }
@article {pmid39768398, year = {2024}, author = {Al-Awthan, YS and Mir, R and Alatawi, FA and Alatawi, AS and Almutairi, FM and Khafaga, T and Shohdi, WM and Fakhry, AM and Alharbi, BM}, title = {Metagenome Analysis Identified Novel Microbial Diversity of Sandy Soils Surrounded by Natural Lakes and Artificial Water Points in King Salman Bin Abdulaziz Royal Natural Reserve, Saudi Arabia.}, journal = {Life (Basel, Switzerland)}, volume = {14}, number = {12}, pages = {}, pmid = {39768398}, issn = {2075-1729}, support = {S-1443-0208//Deputyship for Research &amp; Innovation, Ministry of Education in Saudi Arabia/ ; }, abstract = {BACKGROUND: Soil microbes play a vital role in the ecosystem as they are able to carry out a number of vital tasks. Additionally, metagenomic studies offer valuable insights into the composition and functional potential of soil microbial communities. Furthermore, analyzing the obtained data can improve agricultural restoration practices and aid in developing more effective environmental management strategies.<br><br>METHODOLOGY: In November 2023, sandy soil samples were collected from ten sites of different geographical areas surrounding natural lakes and artificial water points in the Tubaiq conservation area of King Salman Bin Abdulaziz Royal Natural Reserve (KSRNR), Saudi Arabia. In addition, genomic DNA was extracted from the collected soil samples, and 16S rRNA sequencing was conducted using high-throughput Illumina technology. Several computational analysis tools were used for gene prediction and taxonomic classification of the microbial groups.<br><br>RESULTS: In this study, sandy soil samples from the surroundings of natural and artificial water resources of two distinct natures were used. Based on 16S rRNA sequencing, a total of 24,563 OTUs were detected. The metagenomic information was then categorized into 446 orders, 1036 families, 4102 genera, 213 classes, and 181 phyla. Moreover, the phylum Pseudomonadota was the most dominant microbial community across all samples, representing an average relative abundance of 34%. In addition, Actinomycetes was the most abundant class (26%). The analysis of clustered proteins assigned to COG categories provides a detailed understanding of the functional capabilities and adaptation of microbial communities in soil samples. Amino acid metabolism and transport were the most abundant categories in the soil environment.<br><br>CONCLUSIONS: Metagenome analysis of sandy soils surrounding natural lakes and artificial water points in the Tubaiq conservation area of KSRNR (Saudi Arabia) has unveils rich microbial activity, highlighting the complex interactions and ecological roles of microbial communities in these environments.}, }
@article {pmid39768341, year = {2024}, author = {Maffia, A and Scotti, R and Wood, T and Muscolo, A and Lepore, A and Acocella, E and Celano, G}, title = {Transforming Agricultural and Sulfur Waste into Fertilizer: Assessing the Short-Term Effects on Microbial Biodiversity via a Metagenomic Approach.}, journal = {Life (Basel, Switzerland)}, volume = {14}, number = {12}, pages = {}, pmid = {39768341}, issn = {2075-1729}, support = {FARB2023//University of Salerno and the doctoral research funds of the Mediterranean University of Reggio Calabria./ ; }, abstract = {Fungi and soil bacteria are vital for organic matter decomposition and biogeochemical cycles, but excessive synthetic fertilizer use contributes to soil degradation and loss of biodiversity. Despite this, about 97% of soil microorganisms are unculturable, making them difficult to study. Metagenomics offers a solution, enabling the direct extraction of DNA from soil to uncover microbial diversity and functions. This study utilized metagenomics to analyze the rhizosphere of two-year-old Tonda di Giffoni hazelnut saplings treated with synthetic NPK, composted olive pomace, and an innovative fertilizer derived from sulfur-based agro-industrial waste stabilized with bentonite clay. Using 16S rDNA for bacteria and ITS2 for fungi, Illumina sequencing provided insights into microbial responses to different fertilizer treatments. The results highlighted a significant increase in the abundance of beneficial microorganisms such as Thiobacillus, Pseudoxanthomonas, and Thermomyces, especially when organic materials were included. Additionally, microbial biodiversity improved with organic inputs, as shown by increased species richness (Chao1) and diversity (Bray-Curtis) greater than 20% compared with NPK and unfertilized soils (CTR). These findings emphasize the importance of organic fertilization in enhancing soil microbial health, offering a sustainable approach to improving soil quality and hazelnut productivity.}, }
@article {pmid39766799, year = {2024}, author = {Xu, X and Gao, X and Gui, C and Wang, H and Liu, X and Wu, G}, title = {Metagenomic Insights into the Enhancement of Bioavailable Nitrogen in Continuous Cropping Soil Through the Application of Traditional Chinese Medicine Residue Following Fumigation.}, journal = {Genes}, volume = {15}, number = {12}, pages = {}, pmid = {39766799}, issn = {2073-4425}, support = {32060639//National Natural Science Foundation of China/ ; 32060640//National Natural Science Foundation of China/ ; 32260704//National Natural Science Foundation of China/ ; 202105AC160037//Reserve Talents Project for Yunnan Young and Middle-aged Academic and Technical Leaders c/ ; 202205AC160077//Reserve Talents Project for Yunnan Young and Middle-aged Academic and Technical Leadersc/ ; NA//Hunan Engineering Research Center for Green Prevention and Control of Soil-borne Diseases/ ; NA//Hunan Engineering Research Center for Research and Development of plant resources in Nanling area, Hunan Province/ ; }, mesh = {*Soil Microbiology ; *Fumigation/methods ; *Nitrogen/metabolism ; *Rhizosphere ; *Soil/chemistry ; *Fertilizers/analysis ; Metagenomics/methods ; Medicine, Chinese Traditional/methods ; Bacteria/genetics/drug effects/growth &amp; development ; Microbiota/drug effects ; Metagenome ; Capsicum/growth &amp; development/microbiology/drug effects/genetics ; }, abstract = {Background/Objectives: Chemical fumigation can effectively inhibit the occurrence of soil-borne diseases; however, this approach can negatively affect the structure of the soil microbial community. The combination of soil fumigant and organic fertilizer application thus represents a widely adopted strategy in agricultural practice. Traditional Chinese medicine residue (TCMR) is a high-quality organic fertilizer; however, the impact of post-fumigation TCMR application on keystone taxa and their functional traits remains uncertain. Methods: This study examined the effects of five fertilization treatments on the diversity, key species, and related functional genes of microbial communities in rhizosphere soil of continuous cropping pepper. Results: Chemical fumigation followed by TCMR application markedly enhanced soil nutrient content in the rhizosphere and significantly influenced microbial community composition as well as functional gene patterns associated with microbial nitrogen cycling. It was also strongly correlated with soil bioavailable nitrogen content. The abundance of keystone bacterial species (Pseudomonadota, Actinomycetota, and Bacillota) substantially increased following TCMR application, alongside a notable rise in Ascomycota abundance within the fungal community. This shift contributed to an increase in beneficial bacterial abundance while reducing that of harmful bacteria. Additionally, TCMR addition affected the abundance of denitrification and DNRA genes involved in nitrogen cycling; specifically, nirB and nirK were strongly associated with soil organic nitrogen content. Conclusions: The combined application of chemical fumigants and TCMR modified the composition of keystone microbial community species by influencing rhizosphere soil TN and other nutrients, and these alterations were linked to multiple nitrogen-cycling functional genes.}, }
@article {pmid39765196, year = {2025}, author = {Caballero-Gómez, J and Ávalos, G and Matas-Méndez, P and Figueiredo, AM and Castro-Scholten, S and Jiménez-Martín, D and Köster, PC and Santín, M and Bailo, B and Cano-Terriza, D and Sarmento, P and Neves, N and Carrapato, C and González-Barrio, D and Mateo, M and García-Bocanegra, I and Dashti, A and Sánchez, S and Carmena, D}, title = {Dietary profiles of wild carnivores and Blastocystis occurrence: The case of the endangered Iberian lynx (Lynx pardinus) and systematic review.}, journal = {Research in veterinary science}, volume = {184}, number = {}, pages = {105518}, doi = {10.1016/j.rvsc.2024.105518}, pmid = {39765196}, issn = {1532-2661}, mesh = {Animals ; *Lynx/parasitology ; *Blastocystis/isolation &amp; purification ; Spain/epidemiology ; Animals, Wild/parasitology ; Endangered Species ; Portugal/epidemiology ; *Diet/veterinary ; *Blastocystis Infections/veterinary/epidemiology/parasitology ; Feces/parasitology ; }, abstract = {Recent molecular and metagenomic studies have revealed that the obligate anaerobic protist Blastocystis is found more prevalently and with higher subtype diversities in herbivore species than in carnivore species. However, information on wild carnivore species is scarce. Here, we investigated the presence of Blastocystis by molecular methods in fecal DNA samples of free-ranging and captive Iberian lynxes from Spain (n = 243) and Portugal (n = 30). In addition, a systematic review was conducted to obtain information on the Blastocystis prevalence rates and subtype diversities reported in free-living and captive wild carnivores worldwide during the period 2000-2024. Blastocystis was not detected by PCR in any of the samples investigated. Analyses of the data gathered from our systematic review revealed that Blastocystis is uncommon either in free-living (2.1 %, 29/1377) or captive (8.5 %, 100/1175) wild carnivore species. Many of these findings seem to result from accidental acquisition via prey animals, scavenging, contaminated water/feed (free-ranging wild carnivores), or cross-species transmission among animals sharing enclosures (captive wild carnivores). Comparative metagenomic studies analyzing gut microbiota profiles of carnivores are needed to fully understand how microbial communities affect Blastocystis colonization.}, }
@article {pmid39765072, year = {2025}, author = {Khan, M and Nizamani, MM and Asif, M and Kamran, A and He, G and Li, X and Yang, S and Xie, X}, title = {Comprehensive approaches to heavy metal bioremediation: Integrating microbial insights and genetic innovations.}, journal = {Journal of environmental management}, volume = {374}, number = {}, pages = {123969}, doi = {10.1016/j.jenvman.2024.123969}, pmid = {39765072}, issn = {1095-8630}, mesh = {*Biodegradation, Environmental ; *Metals, Heavy/metabolism ; Microbiota ; Humans ; Ecosystem ; }, abstract = {The increasing contamination of ecosystems with heavy metals (HMs) due to industrial activities raises significant jeopardies to environmental health and human well-being. Addressing this issue, recent advances in the field of bioremediation have highlighted the potential of plant-associated microbiomes and genetically engineered organisms (GEOs) to mitigate HMs pollution. This review explores recent advancements in bioremediation strategies for HMs detoxification, with particular attention to omics technologies such as metagenomics, metabolomics, and metaproteomics in deepening the understanding of microbial interactions and their potential for neutralizing HMs. Additionally, Emerging strategies and technologies in GEOs and microorganism-aided nanotechnology have proven to be effective bioremediation tools, particularly for alleviating HM contamination. Despite the promising strategies developed in laboratory settings, several challenges impede their practical application, including ecological risks, regulatory limitations, and public concerns regarding the practice of genetically modified organisms. A comprehensive approach that involves interdisciplinary research is essential to enhance the efficacy and safety of bioremediation technologies. This approach should be coupled with robust regulatory frameworks and active public engagement to ensure environmental integrity and societal acceptance. This review underscores the importance of developing sustainable bioremediation strategies that align with ecological conservation goals and public health priorities.}, }
@article {pmid39763865, year = {2024}, author = {Gonzalez, FL and Ranaivoson, HC and Andrianiaina, A and Andry, S and Raharinosy, V and Randriambolamanantsoa, TH and Lacoste, V and Dussart, P and Héraud, JM and Brook, CE}, title = {Genomic characterization of novel bat kobuviruses in Madagascar: implications for viral evolution and zoonotic risk.}, journal = {bioRxiv : the preprint server for biology}, volume = {}, number = {}, pages = {}, pmid = {39763865}, issn = {2692-8205}, support = {DP2 AI171120/AI/NIAID NIH HHS/United States ; R01 AI129822/AI/NIAID NIH HHS/United States ; R25 GM066522/GM/NIGMS NIH HHS/United States ; }, abstract = {Kobuviruses (family Picornaviridae, genus Kobuvirus) are enteric viruses that infect a wide range of both human and animal hosts. Much of the evolutionary history of kobuviruses remains elusive, largely due to limited screening in wildlife. Bats have been implicated as major sources of virulent zoonoses, including coronaviruses, henipaviruses, and filoviruses, though much of the bat virome still remains uncharacterized. While most bat virus research has historically focused on immediately recognizable zoonotic clades (e.g. SARS-related coronaviruses), a handful of prior reports catalog kobuvirus infection in bats and posit the role of bats as potential progenitors of downstream kobuvirus evolution. As part of a multi-year study, we carried out metagenomic Next Generation Sequencing (mNGS) on fecal samples obtained from endemic, wild-caught Madagascar fruit bats to characterize potentially zoonotic viruses circulating within these populations. The wild bats of Madagascar represent diverse Asian and African phylogeographic histories, presenting a unique opportunity for viruses from disparate origins to mix, posing significant public health threats. Here, we report detection of kobuvirus RNA in Malagasy fruit bat (Eidolon dupreanum) feces and undertake phylogenetic characterization of one full genome kobuvirus sequence, which nests within the Aichivirus A clade - a kobuvirus clade known to infect a wide range of hosts including humans, rodents, canids, felids, birds, and bats. Given the propensity of kobuviruses for recombination and cross-species infection, further characterization of this clade is critical to accurate evaluation of future zoonotic threats.}, }
@article {pmid39763701, year = {2025}, author = {Hereira-Pacheco, S and Arias-Del Razo, I and Miranda-Carrazco, A and Dendooven, L and Estrada-Torres, A and Navarro-Noya, YE}, title = {Metagenomic analysis of fungal assemblages at a regional scale in high-altitude temperate forest soils: alternative methods to determine diversity, composition and environmental drivers.}, journal = {PeerJ}, volume = {13}, number = {}, pages = {e18323}, pmid = {39763701}, issn = {2167-8359}, mesh = {*Soil Microbiology ; *Forests ; *Metagenomics/methods ; *Fungi/genetics/classification/isolation &amp; purification ; *Altitude ; Mexico ; Mycobiome/genetics ; Biodiversity ; }, abstract = {BACKGROUND: Understanding the diversity and distribution of fungal communities at a regional scale is important since fungi play a crucial role in ecosystem functioning. Our study used environmental metagenomics to determine fungal communities in mountainous forest soils in the central highlands of Mexico.<br><br>METHODS: We used four different bioinformatic workflows to profile fungal assemblages, i.e., Geneious+UNITE, single- and paired-end microbial community profiling (MiCoP), and Kraken2.<br><br>RESULTS: The workflows yielded different results; one detected a higher abundance of ectomycorrhizal (EcM) and saprophytic fungi, while the other identified more saprophytic and pathogenic fungi. Environmental, vegetation, and geographical factors determined the spatial distribution of soil fungi at a regional scale. Potential hydrogen (pH), calcium (Ca), magnesium (Mg), and silt content were detected as common drivers of fungal communities across different datasets enriched towards a functional guild. Vegetation traits were found to be more influential in shaping symbiotrophic fungi composition than saprotrophic and pathogenic fungi. This highlights the importance of considering vegetation traits when studying fungal community diversity and distribution. Clustering patterns of sampling points near the volcanoes indicated shared environmental and vegetation characteristics. A weak but significant distance decay in taxonomic similarity revealed that dispersal limitation contributed to fungal community composition, although it was not the primary factor in this study. Overall, this study provides important insights into the challenges and opportunities of studying fungal communities at a regional scale using metagenomic data.}, }
@article {pmid39762979, year = {2025}, author = {Oh, S and Kim, J and Shin, CM and Lee, HJ and Lee, HS and Park, KU}, title = {Metagenomic characterization of oral microbiome signatures to predict upper gastrointestinal and pancreaticobiliary cancers: a case-control study.}, journal = {Journal of translational medicine}, volume = {23}, number = {1}, pages = {20}, pmid = {39762979}, issn = {1479-5876}, support = {16-2021-0007//Seoul National University Bundang Hospital/ ; }, mesh = {Humans ; Case-Control Studies ; *Metagenomics/methods ; *Pancreatic Neoplasms/microbiology/diagnosis ; Female ; Male ; Middle Aged ; *Microbiota/genetics ; Mouth/microbiology ; RNA, Ribosomal, 16S/genetics ; Aged ; Metagenome ; Saliva/microbiology ; Biliary Tract Neoplasms/microbiology/diagnosis ; Gastrointestinal Neoplasms/microbiology/diagnosis ; }, abstract = {BACKGROUND: This study investigated the oral microbiome signatures associated with upper gastrointestinal (GI) and pancreaticobiliary cancers.<br><br>METHODS: Saliva samples from cancer patients and age- and sex-matched healthy controls were analyzed using 16S rRNA-targeted sequencing, followed by comprehensive bioinformatics analysis.<br><br>RESULTS: Significant dissimilarities in microbial composition were observed between cancer patients and controls across esophageal cancer (EC), gastric cancer (GC), biliary tract cancer (BC), and pancreatic cancer (PC) groups (R[2]&#x2009;=&#x2009;0.067,&#x2009;=&#x2009;0.075,&#x2009;=&#x2009;0.068, and&#x2009;=&#x2009;0.044; p&#x2009;=&#x2009;0.001,&#x2009;=&#x2009;0.001,&#x2009;=&#x2009;0.002, and&#x2009;=&#x2009;0.004, respectively). Additionally, the oral microbiome composition significantly differed by the four cancer sites (p&#x2009;=&#x2009;0.001 for EC vs. GC, EC vs. BC, EC vs. PC, GC vs. BC, and GC vs. PC; p&#x2009;=&#x2009;0.013 for BC vs. PC). We built oral metagenomic classifiers to predict cancer and selected specific microbial taxa with diagnostic properties. For EC, the classifier differentiated cancer patients and controls with good accuracy (area under the curve [AUC]&#x2009;=&#x2009;0.791) and included three genera: Akkermansia, Escherichia-Shigella, and Subdoligranulum. For GC, the classifier exhibited high discriminative power (AUC&#x2009;=&#x2009;0.961); it included five genera (Escherichia-Shigella, Gemella, Holdemanella, Actinomyces, and Stomatobaculum) and three species (Eubacterium sp. oral clone EI074, Ruminococcus sp. Marseille-P328, and Leptotrichia wadei F0279). However, microbial taxa with diagnostic features for BC and PC were not identified.<br><br>CONCLUSIONS: These findings suggested that the oral microbiome composition may serve as an indicator of tumorigenesis in upper GI and pancreaticobiliary cancers. The development of oral metagenomic classifiers for EC and GC demonstrates the potential value of microbial biomarkers in cancer screening.}, }
@article {pmid39762435, year = {2025}, author = {Fackelmann, G and Manghi, P and Carlino, N and Heidrich, V and Piccinno, G and Ricci, L and Piperni, E and Arrè, A and Bakker, E and Creedon, AC and Francis, L and Capdevila Pujol, J and Davies, R and Wolf, J and Bermingham, KM and Berry, SE and Spector, TD and Asnicar, F and Segata, N}, title = {Gut microbiome signatures of vegan, vegetarian and omnivore diets and associated health outcomes across 21,561 individuals.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {41-52}, pmid = {39762435}, issn = {2058-5276}, support = {U01 CA230551/CA/NCI NIH HHS/United States ; microTOUCH-101045015)//EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Diet ; *Diet, Vegetarian ; Female ; *Diet, Vegan ; Male ; *Bacteria/classification/genetics/isolation &amp; purification ; Adult ; Vegans ; Middle Aged ; Metagenomics ; Cohort Studies ; }, abstract = {As plant-based diets gain traction, interest in their impacts on the gut microbiome is growing. However, little is known about diet-pattern-specific metagenomic profiles across populations. Here we considered 21,561 individuals spanning 5 independent, multinational, human cohorts to map how differences in diet pattern (omnivore, vegetarian and vegan) are reflected in gut microbiomes. Microbial profiles distinguished these common diet patterns well (mean AUC = 0.85). Red meat was a strong driver of omnivore microbiomes, with corresponding signature microbes (for example, Ruminococcus torques, Bilophila wadsworthia and Alistipes putredinis) negatively correlated with host cardiometabolic health. Conversely, vegan signature microbes were correlated with favourable cardiometabolic markers and were enriched in omnivores consuming more plant-based foods. Diet-specific gut microbes partially overlapped with food microbiomes, especially with dairy microbes, for example, Streptococcus thermophilus, and typical soil microbes in vegans. The signatures of common western diet patterns can support future nutritional interventions and epidemiology.}, }
@article {pmid39762302, year = {2025}, author = {Kim, MJ and Song, MH and Ji, YS and Park, JW and Shin, YK and Kim, SC and Kim, G and Cho, B and Park, H and Ku, JL and Jeong, SY}, title = {Cell free supernatants of Bifidobacterium adolescentis and Bifidobacterium longum suppress the tumor growth in colorectal cancer organoid model.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {935}, pmid = {39762302}, issn = {2045-2322}, support = {2021M3H9A1030151//National Research Foundation, South Korea/ ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology/pathology/metabolism ; *Bifidobacterium longum/metabolism ; *Organoids/microbiology/metabolism ; *Gastrointestinal Microbiome ; *Bifidobacterium adolescentis/metabolism ; Female ; Male ; Probiotics ; Middle Aged ; Aged ; Cell Proliferation ; Cell Line, Tumor ; }, abstract = {The probiotic gut microbiome and its metabolites are pivotal in regulating host metabolism, inflammation, and immunity. Host genetics, colonization at birth, the host lifestyle, and exposure to diseases and drugs determine microbial composition. Dysbiosis and disruption of homeostasis in the beneficial microbiome have been reported to be involved in the tumorigenesis and progression of colorectal cancer (CRC). However, the influence of bacteria-secreted metabolites on CRC growth is yet to be fully elucidated. In this study, we compared the microbial composition of CRC patients to healthy controls to identify distinct patterns of microbiota-derived metabolites in CRC patients. Metagenomic analysis demonstrated that beneficial bacteria strains; Blautia producta, Bifidobacterium adolescentis, and Bifidobacterium longum decreased, while Parabacteroides distasonis and Bacteroides ovatus were more prevalent in the CRC patient group. Treatment of cancer organoid lines with microbial culture supernatants from Blautia producta, Bifidobacterium adolescentis, and Bifidobacterium longum showed remarkable inhibition of cancer growth. This study demonstrates that the bacterial metabolites depleted in CRC patients may inhibit cancer growth and highlights the effects of microbiome-derived metabolites on CRC growth.}, }
@article {pmid39762227, year = {2025}, author = {Ding, J and Liu, F and Zeng, J and Gu, H and Huang, J and Wu, B and Shu, L and Yan, Q and He, Z and Wang, C}, title = {Depth heterogeneity of lignin-degrading microbiome and organic carbon processing in mangrove sediments.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {5}, pmid = {39762227}, issn = {2055-5008}, mesh = {*Geologic Sediments/microbiology ; *Lignin/metabolism ; *Microbiota ; *Carbon/metabolism ; *Wetlands ; *Metagenomics/methods ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Biomass ; Metagenome ; Sequence Analysis, DNA ; }, abstract = {Mangrove ecosystems are globally recognized for their blue carbon (C) sequestration capacity. Lignocellulosic detritus constitutes the primary C input to mangrove sediments, but the microbial processes involved in its bioprocessing remain unclear. Using lignocellulosic analysis and metagenomic sequencing across five 100-cm sediment cores, we found a high proportion of lignin (95.0-97.7%) within sediments' lignocellulosic detritus, with a small fraction of lignin-degrading genes (1.24-1.98%) of lignin-degrading genes within the carbohydrate-active enzyme coding genes. Depth stratification was observed in genes and microbial communities involved in lignin depolymerization and mineralization of lignin monomer derivatives. Further microbe-centered analyses of biomass production rates and adaptive metabolism revealed diminished microbial C use efficiency potential and augmented "enzyme latch" with increasing sediment depths. These findings enhance our understanding of sedimentary organic C cycling and storage in coastal blue C ecosystems.}, }
@article {pmid39762111, year = {2025}, author = {Al-Shakhshir, S and Quraishi, MN and Mullish, B and Patel, A and Vince, A and Rowe, A and Homer, V and Jackson, N and Gyimah, D and Shabir, S and Manzoor, S and Cooney, R and Alrubaiy, L and Quince, C and van Schaik, W and Hares, M and Beggs, AD and Efstathiou, E and Rimmer, P and Weston, C and Iqbal, T and Trivedi, PJ}, title = {FAecal micRobiota transplantation in primary sclerosinG chOlangitis (FARGO): study protocol for a randomised, multicentre, phase IIa, placebo-controlled trial.}, journal = {BMJ open}, volume = {15}, number = {1}, pages = {e095392}, pmid = {39762111}, issn = {2044-6055}, mesh = {Adult ; Female ; Humans ; Male ; *Cholangitis, Sclerosing/therapy ; Clinical Trials, Phase II as Topic ; *Fecal Microbiota Transplantation/methods ; Gastrointestinal Microbiome ; Inflammatory Bowel Diseases/therapy/microbiology ; Multicenter Studies as Topic ; Randomized Controlled Trials as Topic ; Treatment Outcome ; }, abstract = {INTRODUCTION: Primary sclerosing cholangitis (PSC) is the classical hepatobiliary manifestation of inflammatory bowel disease (IBD). The strong association between gut and liver inflammation has driven several pathogenic hypotheses to which the intestinal microbiome is proposed to contribute. Pilot studies of faecal microbiota transplantation (FMT) in PSC and IBD are demonstrated to be safe and associated with increased gut bacterial diversity. However, the longevity of such changes and the impact on markers of disease activity and disease progression have not been studied. The aim of this clinical trial is to determine the effects of repeated FMT as a treatment for PSC-IBD.<br><br>METHODS AND ANALYSIS: FAecal micRobiota transplantation in primary sclerosinG chOlangitis (FARGO) is a phase IIa randomised placebo-controlled trial to assess the efficacy and safety of repeated colonic administration of FMT in patients with non-cirrhotic PSC-IBD. Fifty-eight patients will be recruited from six sites across England and randomised in a 1:1 ratio between active FMT or FMT placebo arms. FMT will be manufactured by the University of Birmingham Microbiome Treatment Centre, using stool collected from rigorously screened healthy donors. A total of 8&#x2009;weekly treatments will be delivered; the first through colonoscopic administration (week 1) and the remaining seven via once-weekly enema (up to week 8). Participants will then be followed on a 12-weekly basis until week 48 from the first treatment visit. The primary efficacy outcome will be to determine the effect of FMT on serum alkaline phosphatase values over time (end of study at 48 weeks). Key secondary outcomes will be to evaluate the impact of FMT on other liver biochemical parameters, PSC risk scores, circulating and imaging markers of liver fibrosis, health-related quality of life measures, IBD activity and the incidence of PSC-related clinical events. Key translational objectives will be to identify mucosal metagenomic, metatranscriptomic, metabolomic and immunological pathways associated with the administration of FMT.<br><br>ETHICS AND DISSEMINATION: The protocol was approved by the South Central-Hampshire B Research Ethics Committee (REC 23/SC/0147). Participants will be required to provide written informed consent. The results of this trial will be disseminated through national and international presentations and peer-reviewed publications.<br><br>TRIAL REGISTRATION NUMBER: The trial was registered at ClinicalTrials.gov on 23 February 2024 (NCT06286709). Weblink: Study Details | FAecal Microbiota Transplantation in primaRy sclerosinG chOlangitis | ClinicalTrials.gov.}, }
@article {pmid39762107, year = {2025}, author = {Weldegebreal, F and Ayana, DA and Wilfong, T and Dheresa, M and Yadeta, TA and Negesa, AS and Demmu, YM and Tesfa, T and Alemu, TN and Eticha, TG and Geremew, A and Roba, KT and Abdissa, A and Assefa, N and Negash, AA and Cools, P and Tura, AK}, title = {Relationship between vaginal and gut microbiome and pregnancy outcomes in eastern Ethiopia: a protocol for a longitudinal maternal-infant cohort study (the EthiOMICS study).}, journal = {BMJ open}, volume = {15}, number = {1}, pages = {e092461}, pmid = {39762107}, issn = {2044-6055}, mesh = {Humans ; Female ; Ethiopia ; Pregnancy ; *Gastrointestinal Microbiome/genetics ; *Vagina/microbiology ; Infant, Newborn ; Longitudinal Studies ; *Pregnancy Outcome ; Infant ; Feces/microbiology ; Research Design ; Milk, Human/microbiology ; Adult ; }, abstract = {INTRODUCTION: Although evidence exists on the impact of microbiota on pregnancy outcomes in many high-resource settings, there is a lack of research in many low-resource settings like Ethiopia. This study aims to fill this gap by studying the gut and vaginal microbiota changes throughout pregnancy and assess how these changes relate to pregnancy outcomes among a cohort of pregnant women in eastern Ethiopia.<br><br>METHODS AND ANALYSIS: Vaginal and stool samples will be collected using DNA/RNA Shield Collection kits three times starting at 12-22 weeks, 28-36 weeks and at birth (within 7&#x2009;days). Postnatally, newborns' skin swabs (at birth) and rectal swabs will be obtained until 2 years of age. Moreover, breast milk samples at birth and 6&#x2009;months and environmental samples (water, indoor air and soil) will be collected at enrolment, birth, 6, 12 and 24 months post partum. DNA will be extracted using Roche kits. Metagenomic sequencing will be performed to identify metataxonomic profiling and assess variations in microbial profiles, and &#x3b1; and &#x3b2; diversity of the microbiota. Information on socioeconomic, behavioural, household and biological factors will be collected at enrolment. The collected data will be coded, entered into EpiData 3.1 and analysed using Stata 17.<br><br>ETHICS AND DISSEMINATION: The Institutional Health Research Ethics Review Committee (Ref No. IHRERC/033/2022) of Haramaya University, Ethiopia has approved this study ethically. Written informed consent regarding the study and sample storage for biobanking will be obtained from all participants. Results will be published in international peer-reviewed journals, and summaries will be provided to the study funders. Clinical study data will be submitted to Data Compass (https://datacompass.lshtm.ac.uk/), and molecular profiles of the microbiome and whole-genome sequences will be submitted to the European Nucleotide Archive (https://www. ebi.ac.uk/ena). Requests for data should be directed to daberaf@gmail.com. The decision to share data will be made by the study steering committee under the College of Health and Medical Sciences, Haramaya University, Ethiopia.}, }
@article {pmid39761739, year = {2025}, author = {Yavorov-Dayliev, D and Milagro, FI and Ayo, J and Oneca, M and Goyache, I and López-Yoldi, M and FitzGerald, JA and Crispie, F and Cotter, PD and Aranaz, P}, title = {Pediococcus acidilactici CECT 9879 (pA1c®) and heat inactivated pA1c® (pA1c® HI) ameliorate gestational diabetes mellitus in mice.}, journal = {Life sciences}, volume = {362}, number = {}, pages = {123359}, doi = {10.1016/j.lfs.2024.123359}, pmid = {39761739}, issn = {1879-0631}, mesh = {Animals ; Pregnancy ; Female ; *Diabetes, Gestational/therapy/microbiology ; Mice ; Mice, Inbred C57BL ; *Probiotics/pharmacology/therapeutic use ; *Pediococcus acidilactici ; Gastrointestinal Microbiome ; Insulin Resistance ; Blood Glucose/metabolism ; }, abstract = {AIMS: Gestational diabetes mellitus (GDM) is the most common complication of pregnancy and is known to be associated with an increased risk of postpartum metabolic disease. Based on the important role that the intestinal microbiota plays in blood glucose regulation and insulin sensitivity, supplementation of probiotic and postbiotic strains could improve glucose metabolism and tolerance in GDM.<br><br>MAIN METHODS: 56 4-week-old female C57BL/6J-mice were divided into 4 groups (n&#xa0;=&#xa0;14 animals/group): control (CNT), high-fat/high-sucrose (HFS), pA1c&#xae; alive (pA1c&#xae;) and heat-inactivated pA1c&#xae; (pA1c&#xae;HI). Serum biochemical parameters were analyzed, gene expression analyses were conducted, and fecal microbiota composition was evaluated by shot-gun sequencing.<br><br>KEY FINDINGS: pA1c&#xae;- and pA1c&#xae; HI-supplemented groups presented reduced fasting blood glucose levels and reduced insulin resistance during gestation and exhibited lower visceral adiposity and increased muscle tissue, together with an improvement in intrahepatic TGs content and ALT levels. Liver gene expression analyses demonstrated that pA1c&#xae; and pA1c&#xae; HI activities were mediated by modulation of the insulin receptor, but also by an overexpression of beta-oxidation genes, and downregulation of fatty acid biosynthesis genes. Shot-gun metagenomics demonstrated that Pediococcus acidilactici was detected in the feces of all the pA1c&#xae; and pA1c&#xae; HI-group after the supplementation period (75&#xa0;% of the microbial profile was Pediococcus acidilactici) in only nine weeks of supplementation, and modulated gut microbiota composition.<br><br>SIGNIFICANCE: These results may be considered as future perspectives for the development of preventive, even therapeutic options for GDM based on hyperglycemia reduction, blood glucose regulation, hepatic steatosis attenuation and insulin resistance alleviation.}, }
@article {pmid39761633, year = {2025}, author = {Lake, BB and McAdams, ZL and Ericsson, AC and Reinero, C and Gull, T and Lyons, BM}, title = {Feline urethral obstruction alters the urinary microbiota and comparison to oral, preputial, and rectal microbiotas.}, journal = {American journal of veterinary research}, volume = {86}, number = {2}, pages = {}, doi = {10.2460/ajvr.24.07.0213}, pmid = {39761633}, issn = {1943-5681}, mesh = {Animals ; Cats ; Male ; *Cat Diseases/microbiology/urine ; Rectum/microbiology ; *Microbiota ; Mouth/microbiology ; *Urethral Obstruction/veterinary/microbiology ; RNA, Ribosomal, 16S/genetics ; Prospective Studies ; Female ; }, abstract = {OBJECTIVE: To document differences in the microbiota of healthy cats versus cats with urethral obstruction (UO); compare the urinary microbiota with the oral, preputial, and rectal microbiota; and demonstrate that 16S rRNA gene sequencing will reveal rich and diverse urinary microbiota.<br><br>METHODS: 15 client-owned cats with UO and 15 age-matched healthy cats were included from July 2020 through April 2021. Exclusion criteria were evidence of urinary tract infection, urolithiasis, antimicrobial administration, urinary catheterization in the past 30 days, or a comorbidity. This study was a prospective, observational study. Both groups had a baseline CBC, chemistry panel, urinalysis, urine culture, and focal bladder ultrasound. Swabs of the cystocentesis site, buccal mucosa, rectum, prepuce, and urinary samples were collected, and 16S rRNA gene sequencing was used to compare the groups and sites.<br><br>RESULTS: Differences in the microbiota richness and diversity were found in the urine of cats with UO (n = 15) compared to healthy cats (15), along with differences in the preputial and oral samples, supporting the presence of a urinary dysbiosis in cats with UO.<br><br>CONCLUSIONS: Our preliminary data demonstrates a dramatic change in the urinary microbiota of cats with UO along with changes in microbiota in other sites compared to healthy cats.<br><br>CLINICAL RELEVANCE: A urinary dysbiosis in cats with UO has been minimally supported in prior studies using 16S rRNA gene sequencing. Although these are preliminary results, documenting this dysbiosis in cats with UO provides a potential avenue for novel therapeutics.}, }
@article {pmid39761113, year = {2025}, author = {Kardailsky, A and Durán-Vinet, B and Nester, G and Ayad, ME and Raes, EJ and Jeunen, GJ and Miller, AK and McVey, P and Corrigan, S and Fraser, M and Goncalves, P and Burnell, S and Bennett, A and Rauschert, S and Bayer, PE}, title = {Monitoring the Land and Sea: Enhancing Efficiency Through CRISPR-Cas Driven Depletion and Enrichment of Environmental DNA.}, journal = {The CRISPR journal}, volume = {8}, number = {1}, pages = {5-12}, doi = {10.1089/crispr.2024.0050}, pmid = {39761113}, issn = {2573-1602}, mesh = {*CRISPR-Cas Systems/genetics ; *DNA, Environmental/genetics ; *Metagenomics/methods ; *Environmental Monitoring/methods ; Biodiversity ; Clustered Regularly Interspaced Short Palindromic Repeats ; Ecosystem ; }, abstract = {Characterizing biodiversity using environmental DNA (eDNA) represents a paradigm shift in our capacity for biomonitoring complex environments, both aquatic and terrestrial. However, eDNA biomonitoring is limited by biases toward certain species and the low taxonomic resolution of current metabarcoding approaches. Shotgun metagenomics of eDNA enables the collection of whole ecosystem data by sequencing all molecules present, allowing characterization and identification. Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR-associated proteins (Cas)-based methods have the potential to improve the efficiency of eDNA metagenomic sequencing of low-abundant target organisms and simplify data analysis by enrichment of target species or nontarget DNA depletion before sequencing. Implementation of CRISPR-Cas in eDNA has been limited due to a lack of interest and support in the past. This perspective synthesizes current approaches of CRISPR-Cas to study underrepresented taxa and advocate for further application and optimization of depletion and enrichment methods of eDNA using CRISPR-Cas, holding promise for eDNA biomonitoring.}, }
@article {pmid39760260, year = {2025}, author = {You, H and Yang, B and Liu, H and Wu, W and Yu, F and Lin, N and Yang, W and Hu, B and Liu, Y and Zou, H and Hao, S and Xiao, Y and Xu, T and Jiang, Y}, title = {Unravelling distinct patterns of metagenomic surveillance and respiratory microbiota between two P1 genotypes of Mycoplasma pneumoniae.}, journal = {Emerging microbes &amp; infections}, volume = {14}, number = {1}, pages = {2449087}, pmid = {39760260}, issn = {2222-1751}, mesh = {Humans ; *Mycoplasma pneumoniae/genetics/classification/isolation &amp; purification ; *Pneumonia, Mycoplasma/epidemiology/microbiology ; Female ; Male ; Retrospective Studies ; Child ; Child, Preschool ; Metagenomics ; *COVID-19/epidemiology ; Adolescent ; Adult ; Genotype ; Infant ; Middle Aged ; *Microbiota ; Aged ; Young Adult ; SARS-CoV-2 ; Bronchoalveolar Lavage Fluid/microbiology ; *Respiratory System/microbiology ; }, abstract = {To unravel distinct patterns of metagenomic surveillance and respiratory microbiota between Mycoplasma pneumoniae (M. pneumoniae) P1-1 and P1-2 and to explore the impact of the COVID-19 pandemic on epidemiological features, we conducted a multicentre retrospective study which spanned 90,886 pneumonia patients, among which 3164 cases M. pneumoniae were identified. Our findings revealed a concurrent outbreak of M. pneumoniae, with the positivity rate rising sharply to 9.62% from July 2023, compared to the 0.16% to 4.06% positivity rate observed during the 2020-2022 COVID-19 pandemic. P1-1 had a higher odds ratio of co-detecting opportunistic pathogens. However, no significant differences were observed in the co-detection odds ratio between children and other age groups in P1-2. This study is the first to demonstrate differences in relative abundance, diversity of respiratory microbiota and co-detection rate of opportunistic pathogen between M. pneumoniae P1-1 and P1-2. Through bronchoalveolar lavage (BAL) metagenomic and host transcriptomic analyses, we identified variations in co-detection rates of M. pneumoniae P1-1 genotype with opportunistic pathogens like S. pneumoniae, alterations in respiratory microbiota composition, lung inflammation, and disruption of ciliary function. Consistent with the results of host transcriptome, we found that P1-1 infections were associated with significantly higher rates of requiring respiratory support and mechanical ventilation compared to P1-2 infections (Fisher's exact test, p-value = 0.035/0.004). Our study provides preliminary evidence of clinical severity between M. pneumoniae strains, underscoring the need for ongoing research and development of targeted therapeutic strategies.}, }
@article {pmid39758340, year = {2024}, author = {Shang, X and Fu, Y and Wang, Y and Yan, S}, title = {Ramulus Mori (Sangzhi) alkaloids ameliorate high-fat diet induced obesity in rats by modulating gut microbiota and bile acid metabolism.}, journal = {Frontiers in endocrinology}, volume = {15}, number = {}, pages = {1506430}, pmid = {39758340}, issn = {1664-2392}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Diet, High-Fat/adverse effects ; *Obesity/metabolism/drug therapy ; Rats ; Male ; *Bile Acids and Salts/metabolism ; *Rats, Sprague-Dawley ; *Alkaloids/pharmacology ; Lipid Metabolism/drug effects ; Liver/metabolism/drug effects ; Receptors, G-Protein-Coupled/metabolism ; }, abstract = {OBJECTIVE: The objective of this study is to investigate the ability of Ramulus Mori (Sangzhi) alkaloid tablets (SZ-A) to ameliorate obesity and lipid metabolism disorders in rats subjected to a high-fat diet (HFD) through metagenomics, untargeted lipidomics, targeted metabolism of bile acid (BA), and BA pathways, providing a novel perspective on the management of metabolic disorders.<br><br>METHODS: In this research, HFD-fed rats were concurrently administered SZ-A orally. We measured changes in body weight (BW), blood lipid profiles, and liver function to assess therapeutic effects. Liver lipid status was visualized through H&amp;E and Oil Red O. Gut microbiota composition was elucidated using metagenomics. The LC-MS-targeted metabolomics approach was utilized to define the fecal BA profiles. Furthermore, the lipid metabolomics of adipose tissue samples was investigated using an LC-MS analysis platform. The expression levels of the BA receptor were determined by western blotting. Additionally, serum insulin (INS), glucagon-like peptide-1 (GLP-1), and inflammatory cytokines were quantified using an ELISA kit. The integrity of the colonic epithelial barrier was assessed using immunofluorescence.<br><br>RESULTS: SZ-A notably decreased BW and blood lipid levels in obese rats while also alleviating liver injury. Additionally, SZ-A reduced the serum levels of leptin (LEP), INS, and GLP-1, indicating its potential to modulate key metabolic hormones. Most notably, SZ-A substantially improved gut microbiota composition. Specifically, it reshaped the gut microbiota structure in HFD-fed rats by increasing the relative abundance of beneficial bacteria, such as Bacteroides, while decreasing the populations of potentially harmful bacteria, such as Dorea and Blautia. At the BA level, SZ-A decreased the levels of harmful BAs, including hyodeoxycholic acid (HDCA), deoxycholic acid (DCA), 12-keto lithocholic acid (12-KLCA), lithocholic acid (LCA), and muricholic acid (MDCA). Between the model group and SZ-A, 258 differentially abundant metabolites were detected, with 72 upregulated and 186 downregulated. Furthermore, these BAs are implicated in the activation of the FXR-FGF15 and TGR5-GLP-1 pathways in the intestine. This activation helps to alleviate HFD-fed intestinal inflammation and restore intestinal barrier damage by modulating inflammatory cytokines and bolstering the intestinal barrier's capabilities.<br><br>CONCLUSIONS: Our findings indicate that SZ-A effectively modulates BW, serum lipid profiles, and liver function in HFD-fed rats. Moreover, SZ-A exerts a positive influence on inflammatory cytokines, thereby mitigating inflammation and promoting the restoration of the intestinal barrier. Significantly, our research indicates that adjusting the gut microbiome and BA levels could serve as an effective approach for both preventing and treating obesity and related metabolic dyslipidemia.}, }
@article {pmid39756329, year = {2025}, author = {Dai, J and Li, M and He, J and Duan, L and Zhu, X and Liu, L and Meng, M and Shao, X and Zhu, G}, title = {Gut microbiota changes are associated with abnormal metabolism activity in children and adolescents with obsessive-compulsive disorder.}, journal = {Journal of psychiatric research}, volume = {181}, number = {}, pages = {728-737}, doi = {10.1016/j.jpsychires.2024.12.041}, pmid = {39756329}, issn = {1879-1379}, mesh = {Humans ; *Obsessive-Compulsive Disorder/microbiology/metabolism ; Child ; Adolescent ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Feces/microbiology/chemistry ; Metabolomics ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Obsessive-compulsive disorder (OCD) is a chronic and disabling psychiatric disorder characterized by recurrent intrusive thoughts or repetitive behaviors. We sought to better understand the structure of gut microbiota in first visit registration, treatment-naive children and adolescents with OCD, and the relationship between gut microbiota and fecal metabolites. Thus we studied the gut microbial population using 16 S rRNA sequencing in 49 children (8-17 years of age) with OCD, 42 healthy controls (HCs). We found a significant decrease in α-diversity in the OCD group, and the OCD and HC groups had distinctive intestinal flora. To further investigate the potential interaction effects between OCD and functional pathways of the intestinal flora, the 19 OCD patients and 18 aged-matched HCs were selected to undergo metagenomics analysis. We showed that several functional pathways of gut microbiota in patients with OCD were disrupted, such as glucolipid metabolism, amino acid metabolism, steroid biosynthesis, and the second messenger system. Changes in the clinical characteristics of OCD patients were associated with specific bacteria. Metabolomics analysis was also performed on stool samples from 91 subjects. Intestinal microflora metabolite expression in OCD patients was disturbed, and the related metabolic pathway functions were abnormal. Abnormal metabolites of gut microbiota in OCD patients are mainly involved in folate biosynthesis, the prion disease pathway, and the amino acid metabolic network. This study detailed the intestinal microbiota of children and adolescents with OCD. Our study suggests possible modalities for early OCD intervention by targeting the specific bacteria associated with neurotransmitter metabolism.}, }
@article {pmid39755199, year = {2025}, author = {Liu, L and Zhu, G and Hu, J and Chen, H and Zhai, Y}, title = {An unignorable human health risk posed by antibiotic resistome and microbiome in urban rivers: Insights from Beijing, China.}, journal = {Environmental research}, volume = {268}, number = {}, pages = {120752}, doi = {10.1016/j.envres.2025.120752}, pmid = {39755199}, issn = {1096-0953}, mesh = {*Rivers/microbiology ; *Microbiota ; Beijing ; Humans ; Bacteria/genetics ; *Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents ; China ; Environmental Monitoring ; *Drug Resistance, Bacterial/genetics ; Interspersed Repetitive Sequences ; }, abstract = {Urban rivers are the main water bodies humans frequently come into contact with, so the risks posed are closely monitored. Antibiotic resistance genes (ARGs) residues in reclaimed water pose serious risks to human health. There are urgent needs to improve the understanding of distribution of and risks posed by ARGs in urban rivers. In this study, shotgun metagenomic approach was used to characterize ARGs, mobile genetic elements (MGEs), and virulence factors (VFs) in water and sediment from Xinfeng River in Beijing and to identify microbes, potential antibiotic resistant bacteria, and human pathogens (HPs). MGE, microbial community, VF, and ARG co-occurrences were used to assess the environmental risks posed by ARGs. The results indicated that quinolone was the most abundant ARG type and that tufA and fusA were the two dominant ARG subtypes. Wetland effluent increased ARG abundance in the river, and the effect was detected even 50 m downstream. ARG abundances and distribution in the river had difference in different seasons. The dominant bacteria in the river were Proteobacteria, Bacteroidetes, and Actinobacteria, and 59 HPs were detected. In total, 69 MGEs and 19 VFs were found. Co-occurrence networks indicated that potential antibiotic resistant bacteria, MGEs, VFs, and ARGs in the river significantly correlated, indicating the potential risks posed by ARGs. The results improve our understanding of ARG distribution and environmental risks in urban river water. More attention should be paid to controlling environmental risks posed by ARGs in urban river and reclaimed water.}, }
@article {pmid39754646, year = {2025}, author = {Shaffer, M and North, D and Bibby, K}, title = {Evaluating Nanotrap Microbiome Particles as A Wastewater Viral Concentration Method.}, journal = {Food and environmental virology}, volume = {17}, number = {1}, pages = {10}, pmid = {39754646}, issn = {1867-0342}, support = {1748019//National Science Foundation/ ; }, mesh = {*Wastewater/virology/microbiology ; *Microbiota ; *Viruses/isolation &amp; purification/classification/genetics ; Metagenomics/methods ; Bacteria/isolation &amp; purification/classification/genetics/virology ; Tobamovirus/isolation &amp; purification/genetics/classification ; }, abstract = {Wastewater-based surveillance has emerged as a powerful approach to monitoring infectious diseases within a community. Typically, wastewater samples are concentrated before viral analyses to improve sensitivity. Current concentration methods vary in time requirements, costs, and efficiency. Here, we evaluated the concentration efficiency and bias of a novel viral concentration approach, Nanotrap Microbiome Particles (NMP), in wastewater. NMP concentration efficiency was target-specific, with significantly lower concentrations of the bacterial indicator HF183 and viral indicator Carjivirus (formerly crAssphage) relative to direct extraction (1.2 × 10[5] vs. 3.4 × 10[5] GC/mL and 2.0 × 10[5] vs. 1.2 × 10[5] GC/mL, respectively), but significantly higher concentrations of the viral fecal indicator Pepper Mild Mottle Virus (PMMoV) relative to direct extraction (1.4 × 10[5] vs. 8.4 × 10[3] GC/mL). Targeted metagenomic sequencing showed that NMP resulted in significantly more unique species reads per sample than direct extractions (p < 0.001) by detecting species that went undetected by direct extractions. Key viral families identified with high abundances were Adenoviridae, Caliciviridae, Herpesviridae, Papillomaviridae, and Polyomaviridae. NMP showed differential ability for concentrating clinically relevant viral families, suggesting that the technology should be evaluated and optimized for specific viral targets before implementation.}, }
@article {pmid39754220, year = {2025}, author = {Karwowska, Z and Aasmets, O and ,  and Kosciolek, T and Org, E}, title = {Effects of data transformation and model selection on feature importance in microbiome classification data.}, journal = {Microbiome}, volume = {13}, number = {1}, pages = {2}, pmid = {39754220}, issn = {2049-2618}, mesh = {Humans ; *Machine Learning ; *Gastrointestinal Microbiome/genetics ; *Algorithms ; *Metagenomics/methods ; Microbiota/genetics ; Bacteria/classification/genetics ; Biomarkers ; Metagenome ; }, abstract = {BACKGROUND: Accurate classification of host phenotypes from microbiome data is crucial for advancing microbiome-based therapies, with machine learning offering effective solutions. However, the complexity of the gut microbiome, data sparsity, compositionality, and population-specificity present significant challenges. Microbiome data transformations can alleviate some of the aforementioned challenges, but their usage in machine learning tasks has largely been unexplored.<br><br>RESULTS: Our analysis of over 8500 samples from 24 shotgun metagenomic datasets showed that it is possible to classify healthy and diseased individuals using microbiome data with minimal dependence on the choice of algorithm or transformation. Presence-absence transformations performed comparably to abundance-based transformations, and only a small subset of predictors is necessary for accurate classification. However, while different transformations resulted in comparable classification performance, the most important features varied significantly, which highlights the need to reevaluate machine learning-based biomarker detection.<br><br>CONCLUSIONS: Microbiome data transformations can significantly influence feature selection but have a limited effect on classification accuracy. Our findings suggest that while classification is robust across different transformations, the variation in feature selection necessitates caution when using machine learning for biomarker identification. This research provides valuable insights for applying machine learning to microbiome data and identifies important directions for future work.}, }
@article {pmid39753925, year = {2025}, author = {Bora, SS and Ronghang, R and Das, P and Naorem, RS and Hazarika, DJ and Gogoi, R and Banu, S and Barooah, M}, title = {Endophytic Microbial Community Structure and Dynamics Influence Agarwood Formation in Aquilaria malaccensis Lam.}, journal = {Current microbiology}, volume = {82}, number = {2}, pages = {66}, pmid = {39753925}, issn = {1432-0991}, mesh = {*Thymelaeaceae/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Endophytes/genetics/classification/isolation &amp; purification ; *Fungi/genetics/classification/isolation &amp; purification ; Microbiota ; Metagenomics ; Wood/microbiology ; Metagenome ; }, abstract = {Aquilaria malaccensis Lam., an Agarwood-producing tree native to Southeast Asia, secretes oleoresin, a resin with diverse applications, in response to injuries. To explore the role of endosphere microbial communities during Agarwood development, we utilized a metagenomics approach across three stages: non-symptomatic (NC), symptomatic early (IN), and symptomatic mature (IN1). The NC metagenome was dominated by Bacillus (19.15%), Klebsiella (13.25%), and Pantoea (12.46%) among bacteria and Saccharomyces (15.92%) among fungi. Notably, bacterial chemotaxis pathway genes were more prevalent in NC (2.14%) compared to IN (0.92%) and IN1 (1.16%), suggesting microbial chemotactic behavior. In the IN stage, Klebsiella (27.05%) and Saccharomyces (34.81%) were the dominant genera. The IN1 metagenome featured Pantoea (8.92%) and Neurospora (8.24%) as leading bacterial and fungal genera, respectively. Functional genes associated with defense mechanisms, lipid transport, and secondary metabolite biosynthesis were increasingly represented in IN1, indicating an enhanced microbial response as infection progresses. Ecological indices, including a high Shannon-Wiener index (H' = 4.467) and Simpson's dominance (1 - D = 0.9697), alongside Pielou's evenness index (J = 0.7034), highlighted a dynamic and diverse microbial community at the mature infection stage, reflecting the complex interactions within the Aquilaria endosphere during Agarwood formation.}, }
@article {pmid39753668, year = {2025}, author = {Rohwer, RR and Kirkpatrick, M and Garcia, SL and Kellom, M and McMahon, KD and Baker, BJ}, title = {Two decades of bacterial ecology and evolution in a freshwater lake.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {246-257}, pmid = {39753668}, issn = {2058-5276}, support = {DEB-0822700//National Science Foundation (NSF)/ ; DEB-1440297//National Science Foundation (NSF)/ ; MCB-9977903//National Science Foundation (NSF)/ ; DEB-1344254//National Science Foundation (NSF)/ ; WIS01789//U.S. Department of Agriculture (United States Department of Agriculture)/ ; WIS01516//U.S. Department of Agriculture (United States Department of Agriculture)/ ; R01-GM116853//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; DBI-2011002//National Science Foundation (NSF)/ ; DEB-1831730//National Science Foundation (NSF)/ ; R01 GM116853/GM/NIGMS NIH HHS/United States ; DEB-0702395//National Science Foundation (NSF)/ ; DEB-2025982//National Science Foundation (NSF)/ ; DE-AC02-05CH11231//U.S. Department of Energy (DOE)/ ; DEB-9632853//National Science Foundation (NSF)/ ; DEB-0217533//National Science Foundation (NSF)/ ; }, mesh = {*Lakes/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification/metabolism ; *Microbiota/genetics ; Metagenome ; Genome, Bacterial ; Seasons ; *Fresh Water/microbiology ; Phylogeny ; Evolution, Molecular ; *Biological Evolution ; }, abstract = {Ecology and evolution are considered distinct processes that interact on contemporary time scales in microbiomes. Here, to observe these processes in a natural system, we collected a two-decade, 471-metagenome time series from Lake Mendota (Wisconsin, USA). We assembled 2,855 species-representative genomes and found that genomic change was common and frequent. By tracking strain composition via single nucleotide variants, we identified cyclical seasonal patterns in 80% and decadal shifts in 20% of species. In the dominant freshwater family Nanopelagicaceae, environmental extremes coincided with shifts in strain composition and positive selection of amino acid and nucleic acid metabolism genes. These genes identify organic nitrogen compounds as potential drivers of freshwater responses to global change. Seasonal and long-term strain dynamics could be regarded as ecological processes or, equivalently, as evolutionary change. Rather than as distinct interacting processes, we propose a conceptualization of ecology and evolution as a continuum to better describe change in microbial communities.}, }
@article {pmid39753565, year = {2025}, author = {Chen, YC and Su, YY and Chu, TY and Wu, MF and Huang, CC and Lin, CC}, title = {PreLect: Prevalence leveraged consistent feature selection decodes microbial signatures across cohorts.}, journal = {NPJ biofilms and microbiomes}, volume = {11}, number = {1}, pages = {3}, pmid = {39753565}, issn = {2055-5008}, support = {NSTC 112-2221-E-A49 -106 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 109-2221-E-010 -014 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 109-2221-E-010 -014 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 112-2221-E-A49 -106 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 109-2221-E-010 -014 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 109-2221-E-010 -014 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; NSTC 109-2221-E-010 -014 -MY3//Ministry of Science and Technology, Taiwan (Ministry of Science and Technology of Taiwan)/ ; MOHW112-TDU-B-222-124013//Ministry of Health and Welfare (Ministry of Health and Welfare, Taiwan)/ ; MOHW111-TDU-B-221-114007//Ministry of Health and Welfare (Ministry of Health and Welfare, Taiwan)/ ; MOHW112-TDU-B-222-124013//Ministry of Health and Welfare (Ministry of Health and Welfare, Taiwan)/ ; MOHW111-TDU-B-221-114007//Ministry of Health and Welfare (Ministry of Health and Welfare, Taiwan)/ ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology ; Microbiota ; Bacteria/genetics/classification/isolation &amp; purification ; Machine Learning ; Gastrointestinal Microbiome ; Cohort Studies ; Glycerophospholipids ; Computational Biology/methods ; Lipopolysaccharides ; Metagenomics/methods ; }, abstract = {The intricate nature of microbiota sequencing data-high dimensionality and sparsity-presents a challenge in identifying informative and reproducible microbial features for both research and clinical applications. Addressing this, we introduce PreLect, an innovative feature selection framework that harnesses microbes' prevalence to facilitate consistent selection in sparse microbiota data. Upon rigorous benchmarking against established feature selection methodologies across 42 microbiome datasets, PreLect demonstrated superior classification capabilities compared to statistical methods and outperformed machine learning-based methods by selecting features with greater prevalence and abundance. A significant strength of PreLect lies in its ability to reliably identify reproducible microbial features across varied cohorts. Applied to colorectal cancer, PreLect identifies key microbes and highlights crucial pathways, such as lipopolysaccharide and glycerophospholipid biosynthesis, in cancer progression. This case study exemplifies PreLect's utility in discerning clinically relevant microbial signatures. In summary, PreLect's accuracy and robustness make it a significant advancement in the analysis of complex microbiota data.}, }
@article {pmid39752831, year = {2025}, author = {Li, Z and Liu, B and Cao, B and Cun, S and Liu, R and Liu, X}, title = {The potential role of viruses in antibiotic resistance gene dissemination in activated sludge viromes.}, journal = {Journal of hazardous materials}, volume = {486}, number = {}, pages = {137046}, doi = {10.1016/j.jhazmat.2024.137046}, pmid = {39752831}, issn = {1873-3336}, mesh = {*Sewage/virology/microbiology ; *Drug Resistance, Microbial/genetics ; *Bacteriophages/genetics ; *Virome ; Interspersed Repetitive Sequences ; China ; }, abstract = {The dissemination of antibiotic resistance genes (ARGs) in activated sludge (AS) systems poses significant environmental and public health challenges. The role of viruses, primarily bacteriophages, in storing and spreading ARGs in AS systems remains largely unexplored. This study characterized the viral community, virus-associated ARGs (vir_ARGs), and mobile genetic elements (MGEs) of aerobic AS viromes from eight wastewater treatment plants (WWTPs) in eastern China. 78,604 viral operational taxonomic units (vOTUs) were identified, including 1685 temperate vOTUs (T-vOTUs). Five ARG types were detected in 37 vOTUs, indicating a low proportion of ARG-carrying viruses. The co-occurrence rate between vir_ARGs and MGEs was 37.83 %, and six ARG-carrying vOTUs contained multiple MGEs, indicating a transfer potential of vir_ARGs. Additionally, ARG and MGE profiles of AS metagenomes were analyzed to evaluate the transfer potential of phage activity on ARGs. The results showed that phage-associated MGEs showed a significant coupling with both the abundance and composition of ARGs, suggesting a potential role of phages in ARG propagation. These findings offer preliminary insights into understanding the viral resistome and its transfer potential in AS systems. Future research necessitates rigorous pure culture and molecular biology experiments to elucidate the precise mechanisms through which viruses contribute to the dissemination and persistence of ARGs.}, }
@article {pmid39749666, year = {2024}, author = {Defazio, G and Tangaro, MA and Pesole, G and Fosso, B}, title = {kMetaShot: a fast and reliable taxonomy classifier for metagenome-assembled genomes.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {1}, pages = {}, pmid = {39749666}, issn = {1477-4054}, support = {CN_00000013//National Centre on High-Performance Computing, Big Data and Quantum Computing/ ; PNC0000002//Complementary National Plan PNC-I.1/ ; CUP H93C22000560003//Life Science Hub Puglia/ ; }, mesh = {*Metagenome ; *Software ; *Metagenomics/methods ; *Algorithms ; High-Throughput Nucleotide Sequencing/methods ; Computational Biology/methods ; Microbiota/genetics ; }, abstract = {The advent of high-throughput sequencing (HTS) technologies unlocked the complexity of the microbial world through the development of metagenomics, which now provides an unprecedented and comprehensive overview of its taxonomic and functional contribution in a huge variety of macro- and micro-ecosystems. In particular, shotgun metagenomics allows the reconstruction of microbial genomes, through the assembly of reads into MAGs (metagenome-assembled genomes). In fact, MAGs represent an information-rich proxy for inferring the taxonomic composition and the functional contribution of microbiomes, even if the relevant analytical approaches are not trivial and still improvable. In this regard, tools like CAMITAX and GTDBtk have implemented complex approaches, relying on marker gene identification and sequence alignments, requiring a large processing time. With the aim of deploying an effective tool for fast and reliable MAG taxonomic classification, we present here kMetaShot, a taxonomy classifier based on k-mer/minimizer counting. We benchmarked kMetaShot against CAMITAX and GTDBtk by using both in silico and real mock communities and demonstrated how, while implementing a fast and concise algorithm, it outperforms the other tools in terms of classification accuracy. Additionally, kMetaShot is an easy-to-install and easy-to-use bioinformatic tool that is also suitable for researchers with few command-line skills. It is available and documented at https://github.com/gdefazio/kMetaShot.}, }
@article {pmid39748884, year = {2024}, author = {Zhou, H and Pei, Y and Xie, Q and Nie, W and Liu, X and Xia, H and Jiang, J}, title = {Diagnosis and insight into the unique lung microbiota of pediatric pulmonary tuberculosis patients by bronchoalveolar lavage using metagenomic next-generation sequencing.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1492881}, pmid = {39748884}, issn = {2235-2988}, mesh = {Humans ; *Tuberculosis, Pulmonary/diagnosis/microbiology ; Female ; *Bronchoalveolar Lavage Fluid/microbiology ; *High-Throughput Nucleotide Sequencing ; Male ; Child ; *Microbiota/genetics ; *Lung/microbiology ; Child, Preschool ; *Metagenomics/methods ; Sensitivity and Specificity ; Adolescent ; Mycobacterium tuberculosis/genetics/isolation &amp; purification ; Infant ; Bronchoalveolar Lavage ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Although previous studies have reported the dysregulation of respiratory tract microbiota in infectious diseases, insufficient data exist regarding respiratory microbiota imbalances in the lower respiratory tracts of children with pulmonary tuberculosis (PTB). In this study, we assessed the value of mNGS in the pathogen diagnosis and microbiome analysis of PTB patients using bronchoalveolar lavage fluid (BALF) samples.<br><br>METHODS: A total of 64 participants, comprising 43 pediatric PTB and 21 pediatric pneumonia patients were recruited in the present study. BALF samples were collected from the above participants. Parallel comparisons between mNGS and conventional microbial test (CMT) pathogen detection were performed. Moreover, the diversity and structure of all 64 patients' lung BALF microbiomes were explored using the mNGS data.<br><br>RESULTS: Comparing to the final clinical diagnosis, mNGS in BALF samples produced a sensitivity of 46.51%, which was lower than that of TB-PCR (55.00%) and Xpert (55.00%). The diagnostic efficacy of PTB can be highly enhanced by mNGS combined with TB-PCR (AUC=0.8140, P<0.0001). There were no significant differences in the diversity either between patients with TB and pneumonia. Positive mNGS pathogen results in pediatric PTB patients significantly affect the &#x3b2;-diversity of the pulmonary microbiota. In addition, significant taxonomic differences were found in BALF specimens from patients with PTB and pneumonia, both of which have unique bacterial compositions.<br><br>CONCLUSIONS: mNGS is valuable in the etiological diagnosis of PTB, and can reveal pulmonary microecological characteristics. For pediatric PTB patients, the mNGS should be implemented early and complementary to CMTs.}, }
@article {pmid39748068, year = {2025}, author = {Li, S and Ma, X and Mei, H and Chang, X and He, P and Sun, L and Xiao, H and Wang, S and Li, R}, title = {Association between gut microbiota and short-chain fatty acids in children with obesity.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {483}, pmid = {39748068}, issn = {2045-2322}, support = {2019ZYYD051//the Special Projects for the Central Government to Guide the Development of Local Science and Technology/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Child ; Male ; *Fatty Acids, Volatile/metabolism/blood ; Female ; Adolescent ; *Pediatric Obesity/microbiology/metabolism/blood ; Case-Control Studies ; Feces/microbiology ; Metabolome ; Metagenomics/methods ; Body Mass Index ; }, abstract = {The gut microbiome and its metabolites may be important role in regulating the pathogenesis of obesity. This study aimed to characterize the gut microbiome and short-chain fatty acid (SCFA) metabolome in obese children. This case-control study recruited children aged 7‒14 years and divided them into a normal group (NG) and an obese group (OG) based on their body mass index. Whole-genome shotgun metagenomic analysis was performed on fecal samples from the OG and NG groups to characterize the signatures and functional potential of the gut microbiota. Serum metabolite profiles were analyzed using high-performance liquid chromatography/mass spectrometry (LC/MS). The Statistical Package for the Social Sciences (SPSS, version 26) and R software were used for data analysis. A total of 99 children were recruited, with 49 in the OG and 50 in the NG. At the phylum level, Proteobacteria were significantly more abundant in children in the OG than those in the NG. At the genus level, Oscillibacter and Alistipes were significantly lower in children in the OG than those in the NG. Caproate levels significantly increased, whereas butyrate and isobutyrate levels decreased in children in the OG than those in the NG. Kyoto encyclopedia of genes and genomes (KEGG) functional analysis revealed 28 enriched KEGG pathways, of which/with the phosphotransferase system (PTS) and enhanced biofilm formation by Escherichia coli were particularly significant in the OG. Spearman's correlation analysis indicated that the genus Oscillibacter and species Clostridium_sp._CAG:302 connect serum metabolites and the gut microbiota in childhood obesity. Childhood obesity is correlated with the symbiotic status of the gut microbiota. The microbiota influences human metabolism via specific pathways, particularly butyrate, caproate, and the genus Oscillibacter, all closely associated with obesity.}, }
@article {pmid39747695, year = {2025}, author = {Wang, X and Fang, Y and Liang, W and Cai, Y and Wong, CC and Wang, J and Wang, N and Lau, HC and Jiao, Y and Zhou, X and Ye, L and Mo, M and Yang, T and Fan, M and Song, L and Zhou, H and Zhao, Q and Chu, ES and Liang, M and Liu, W and Liu, X and Zhang, S and Shang, H and Wei, H and Li, X and Xu, L and Liao, B and Sung, JJY and Kuang, M and Yu, J}, title = {Gut-liver translocation of pathogen Klebsiella pneumoniae promotes hepatocellular carcinoma in mice.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {169-184}, pmid = {39747695}, issn = {2058-5276}, support = {82173191//National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)/ ; }, mesh = {*Klebsiella pneumoniae/pathogenicity/physiology/genetics ; Animals ; *Carcinoma, Hepatocellular/microbiology/pathology ; *Liver Neoplasms/microbiology/pathology ; Mice ; *Gastrointestinal Microbiome ; Humans ; Toll-Like Receptor 4/metabolism ; *Liver/microbiology/pathology ; *Klebsiella Infections/microbiology/complications ; Fecal Microbiota Transplantation/adverse effects ; *Bacterial Translocation ; Disease Models, Animal ; Male ; Mice, Inbred C57BL ; Carcinogenesis ; Cell Proliferation ; Feces/microbiology ; }, abstract = {Hepatocellular carcinoma (HCC) is accompanied by an altered gut microbiota but whether the latter contributes to carcinogenesis is unclear. Here we show that faecal microbiota transplantation (FMT) using stool samples from patients with HCC spontaneously initiate liver inflammation, fibrosis and dysplasia in wild-type mice, and accelerate disease progression in a mouse model of HCC. We find that HCC-FMT results in gut barrier injury and translocation of live bacteria to the liver. Metagenomic analyses and bacterial culture of liver tissues reveal enrichment of the gut pathogen Klebsiella pneumoniae in patients with HCC and mice transplanted with the HCC microbiota. Moreover, K. pneumoniae monocolonization recapitulates the effect of HCC-FMT in promoting liver inflammation and hepatocarcinogenesis. Mechanistically, K. pneumoniae surface protein PBP1B interacts with and activates TLR4 on HCC cells, leading to increased cell proliferation and activation of oncogenic signalling. Targeting gut colonization using K. oxytoca or TLR4 inhibition represses K. pneumoniae-induced HCC progression. These findings indicate a role for an altered gut microbiota in hepatocarcinogenesis.}, }
@article {pmid39747694, year = {2025}, author = {Hsu, TY and Nzabarushimana, E and Wong, D and Luo, C and Beiko, RG and Langille, M and Huttenhower, C and Nguyen, LH and Franzosa, EA}, title = {Profiling lateral gene transfer events in the human microbiome using WAAFLE.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {94-111}, pmid = {39747694}, issn = {2058-5276}, support = {R24DK110499//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; K23DK125838//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; T32CA009001//U.S. Department of Health &amp; Human Services | NIH | National Cancer Institute (NCI)/ ; Career Development Award//Crohn's and Colitis Foundation (Crohn's &amp; Colitis Foundation)/ ; T32 CA009001/CA/NCI NIH HHS/United States ; U54DE023798//U.S. Department of Health &amp; Human Services | NIH | National Institute of Dental and Craniofacial Research (NIDCR)/ ; Research Scholars Award//American Gastroenterological Association (AGA)/ ; }, mesh = {Humans ; *Gene Transfer, Horizontal ; *Microbiota/genetics ; Phylogeny ; Metagenome/genetics ; Algorithms ; *Bacteria/genetics/classification ; Metagenomics/methods ; *Computational Biology/methods ; }, abstract = {Lateral gene transfer (LGT), also known as horizontal gene transfer, facilitates genomic diversification in microbial populations. While previous work has surveyed LGT in human-associated microbial isolate genomes, the landscape of LGT arising in personal microbiomes is not well understood, as there are no widely adopted methods to characterize LGT from complex communities. Here we developed, benchmarked and validated a computational algorithm (WAAFLE or Workflow to Annotate Assemblies and Find LGT Events) to profile LGT from assembled metagenomes. WAAFLE prioritizes specificity while maintaining high sensitivity for intergenus LGT. Applying WAAFLE to >2,000 human metagenomes from diverse body sites, we identified >100,000 high-confidence previously uncharacterized LGT (~2 per microbial genome-equivalent). These were enriched for mobile elements, as well as restriction-modification functions associated with the destruction of foreign DNA. LGT frequency was influenced by biogeography, phylogenetic similarity of involved pairs (for example, Fusobacterium periodonticum and F. nucleatum) and donor abundance. These forces manifest as networks in which hub taxa donate unequally with phylogenetic neighbours. Our findings suggest that human microbiome LGT may be more ubiquitous than previously described.}, }
@article {pmid39747693, year = {2025}, author = {Michoud, G and Peter, H and Busi, SB and Bourquin, M and Kohler, TJ and Geers, A and Ezzat, L and ,  and Battin, TJ}, title = {Mapping the metagenomic diversity of the multi-kingdom glacier-fed stream microbiome.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {217-230}, pmid = {39747693}, issn = {2058-5276}, support = {Vanishing Glaciers Project//NOMIS Stiftung (NOMIS Foundation)/ ; }, mesh = {*Microbiota/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Metagenomics ; *Metagenome ; *Rivers/microbiology ; *Ice Cover/microbiology ; Fungi/genetics/classification/isolation &amp; purification ; Biofilms/growth &amp; development ; Geologic Sediments/microbiology ; Biodiversity ; Viruses/genetics/classification ; Ecosystem ; }, abstract = {Glacier-fed streams (GFS) feature among Earth's most extreme aquatic ecosystems marked by pronounced oligotrophy and environmental fluctuations. Microorganisms mainly organize in biofilms within them, but how they cope with such conditions is unknown. Here, leveraging 156 metagenomes from the Vanishing Glaciers project obtained from sediment samples in GFS from 9 mountains ranges, we report thousands of metagenome-assembled genomes (MAGs) encompassing prokaryotes, algae, fungi and viruses, that shed light on biotic interactions within glacier-fed stream biofilms. A total of 2,855 bacterial MAGs were characterized by diverse strategies to exploit inorganic and organic energy sources, in part via functional redundancy and mixotrophy. We show that biofilms probably become more complex and switch from chemoautotrophy to heterotrophy as algal biomass increases in GFS owing to glacier shrinkage. Our MAG compendium sheds light on the success of microbial life in GFS and provides a resource for future research on a microbiome potentially impacted by climate change.}, }
@article {pmid39747692, year = {2025}, author = {Olm, MR and Spencer, SP and Takeuchi, T and Silva, EL and Sonnenburg, JL}, title = {Metagenomic immunoglobulin sequencing reveals IgA coating of microbial strains in the healthy human gut.}, journal = {Nature microbiology}, volume = {10}, number = {1}, pages = {112-125}, pmid = {39747692}, issn = {2058-5276}, support = {K08DK134856//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R01 DK085025/DK/NIDDK NIH HHS/United States ; T32 AI007328/AI/NIAID NIH HHS/United States ; K08 DK134856/DK/NIDDK NIH HHS/United States ; S10 OD026929/OD/NIH HHS/United States ; S10 OD026831/OD/NIH HHS/United States ; F32 DK128865/DK/NIDDK NIH HHS/United States ; DP1AT009892//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; T32DK007056//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; DP1 AT009892/AT/NCCIH NIH HHS/United States ; T32 DK007056/DK/NIDDK NIH HHS/United States ; F32DK128865//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; }, mesh = {Humans ; *Immunoglobulin A/genetics/immunology/metabolism ; *Gastrointestinal Microbiome/immunology/genetics ; Feces/microbiology ; *Metagenomics/methods ; *Bacteria/genetics/immunology/classification/isolation &amp; purification ; Healthy Volunteers ; Metagenome ; }, abstract = {IgA, the primary human antibody secreted from the gut mucosa, shapes the intestinal microbiota. Methodological limitations have hindered defining which microbial strains are targeted by IgA and the implications of binding. Here we develop a technique, metagenomic immunoglobulin sequencing (MIg-seq), that provides strain-level resolution of microbes coated by IgA and use it to determine IgA coating levels for 3,520 gut microbiome strains in healthy human faeces. We find that both health and disease-associated bacteria are targeted by IgA. Microbial genes are highly predictive of IgA binding levels; in particular, mucus degradation genes are correlated with high binding, and replication rates are significantly reduced for microbes bound by IgA. We demonstrate that IgA binding is more correlated with host immune status than traditional relative abundance measures of microbial community composition. This study introduces a powerful technique for assessing strain-level IgA binding in human stool, paving the way for deeper understanding of IgA-based host-microbe interactions.}, }
@article {pmid39747535, year = {2025}, author = {Wongsamart, R and Somboonna, N and Cheibchalard, T and Klankeo, P and Ruampatana, J and Nuntapaitoon, M}, title = {Probiotic Bacillus licheniformis DSMZ 28710 improves sow milk microbiota and enhances piglet health outcomes.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {17}, pmid = {39747535}, issn = {2045-2322}, support = {764002-DT//Ratchadapisek Sompoch Endowment Fund 2021/ ; 764002-DT//Ratchadapisek Sompoch Endowment Fund 2021/ ; //the Second Century Fund (C2F)/ ; //the Second Century Fund (C2F)/ ; //the Second Century Fund (C2F)/ ; //the Second Century Fund (C2F)/ ; CU_FRB65_hea(68)_131_23_61//Thailand Research Fund, Thailand Science Research and Innovation Fund Chulalongkorn University/ ; FOOD_FF_68_013_3100_003//Thailand Research Fund, Thailand Science Research and Innovation Fund Chulalongkorn University/ ; }, mesh = {Animals ; *Probiotics/administration &amp; dosage ; Swine ; *Milk/microbiology ; *Microbiota ; *Bacillus licheniformis ; RNA, Ribosomal, 16S/genetics ; Female ; Colostrum/microbiology ; Dietary Supplements ; Animal Feed ; }, abstract = {Maintaining a diverse and balanced sow milk microbiome is essential to piglet development. Thus, this study aimed to examine the effects of probiotic Bacillus licheniformis supplementation on the microbiome composition of sow colostrum and milk, and to review associated health findings in piglets. B. licheniformis DSMZ 28710 was supplemented at 10 g/day as feed additive before predicted farrowing until weaning by top dressing. Colostrum and milk samples were collected for metagenomic DNA extraction, 16s rRNA sequencing, and bioinformatics analyses for bacterial microbiota diversity. Results indicated that the supplementation increased the abundances of beneficial bacteria, such as Lactobacillus, Pediococcus, Bacteroides, and Bifidobacterium, while decreasing the abundances of pathogenic bacteria, such as Staphylococcus aureus, Enterobacteriaceae, and Campylobacter in the colostrum. The supplementation increased diversity while maintaining richness and evenness. Moreover, the rise in predicted microbial community metabolic function in membrane transport pathways provides crucial evidence showing that the supplementation is potentially beneficial to piglets, as these pathways are important for providing nutrients and immunity to offspring. This research highlights the importance of microbiome composition in sow milk and the potential of B. licheniformis supplementation as a means to improve piglet health and development.}, }
@article {pmid39747287, year = {2025}, author = {Delgadillo, DR and Borelli, JL and Mayer, EA and Labus, JS and Cross, MP and Pressman, SD}, title = {Biological, environmental, and psychological stress and the human gut microbiome in healthy adults.}, journal = {Scientific reports}, volume = {15}, number = {1}, pages = {362}, pmid = {39747287}, issn = {2045-2322}, mesh = {Humans ; *Gastrointestinal Microbiome ; Female ; Adult ; *Stress, Psychological/microbiology ; Male ; *RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Phylogeny ; Middle Aged ; Metagenome ; }, abstract = {Emerging research suggests that the gut microbiome plays a crucial role in stress. We assess stress-microbiome associations in two samples of healthy adults across three stress domains (perceived stress, stressful life events, and biological stress /Respiratory Sinus Arrhythmia; RSA). Study 1 (n = 62; mean-age = 37.3 years; 68% female) and Study 2 (n = 74; mean-age = 41.6 years; female only) measured RSA during laboratory stressors and used 16S rRNA pyrosequencing to classify gut microbial composition from fecal samples. Phylogenetic Investigation of Communities by Reconstruction of Unobserved States was used to predict functional pathways of metagenomes. Results showed differences in beta diversity between high and low stressful life events groups across both studies. Study 1 revealed differences in beta diversity between high and low RSA groups. In Study 1, the low perceived stress group was higher in alpha diversity than the high perceived stress group. Levels of Clostridium were negatively associated with RSA in Study 1 and levels Escherichia/Shigella were positively associated with perceived stress in Study 2. Associations between microbial functional pathways (L-lysine production and formaldehyde absorption) and RSA are discussed. Findings suggest that certain features of the gut microbiome are differentially associated with each stress domain.}, }
@article {pmid39746973, year = {2025}, author = {Inskeep, WP and Jay, ZJ and McKay, LJ and Dlakić, M}, title = {Respiratory processes of early-evolved hyperthermophiles in sulfidic and low-oxygen geothermal microbial communities.}, journal = {Nature communications}, volume = {16}, number = {1}, pages = {277}, pmid = {39746973}, issn = {2041-1723}, support = {1950770//National Science Foundation (NSF)/ ; }, mesh = {Hot Springs/microbiology ; *Pyrobaculum/classification/enzymology/genetics ; *Microbiota ; *Hot Temperature ; *Bacteria/classification/enzymology/genetics ; Anaerobiosis ; Electron Transport ; *Sulfur/metabolism ; *Arsenic/metabolism ; *Cytochrome b Group/metabolism ; *Oxidoreductases/metabolism ; Geothermal Energy ; Phylogeny ; Energy Metabolism ; }, abstract = {Thermophilic microbial communities growing in low-oxygen environments often contain early-evolved archaea and bacteria, which hold clues regarding mechanisms of cellular respiration relevant to early life. Here, we conducted replicate metagenomic, metatranscriptomic, microscopic, and geochemical analyses on two hyperthermophilic (82-84 °C) filamentous microbial communities (Conch and Octopus Springs, Yellowstone National Park, WY) to understand the role of oxygen, sulfur, and arsenic in energy conservation and community composition. We report that hyperthermophiles within the Aquificota (Thermocrinis), Pyropristinus (Caldipriscus), and Thermoproteota (Pyrobaculum) are abundant in both communities; however, higher oxygen results in a greater diversity of aerobic heterotrophs. Metatranscriptomics revealed major shifts in respiratory pathways of keystone chemolithotrophs due to differences in oxygen versus sulfide. Specifically, early-evolved hyperthermophiles express high levels of high-affinity cytochrome bd and CydAA' oxidases in suboxic sulfidic environments and low-affinity heme Cu oxidases under microaerobic conditions. These energy-conservation mechanisms using cytochrome oxidases in high-temperature, low-oxygen habitats likely played a crucial role in the early evolution of microbial life.}, }
@article {pmid39745433, year = {2025}, author = {Grüterich, L and Woodhouse, JN and Mueller, P and Tiemann, A and Ruscheweyh, H-J and Sunagawa, S and Grossart, H-P and Streit, WR}, title = {Assessing environmental gradients in relation to dark CO2 fixation in estuarine wetland microbiomes.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0217724}, pmid = {39745433}, issn = {1098-5336}, support = {407270017//Deutsche Forschungsgemeinschaft (DFG)/ ; 502681570//Deutsche Forschungsgemeinschaft (DFG)/ ; }, mesh = {*Wetlands ; *Microbiota ; *Carbon Dioxide/metabolism ; *Bacteria/metabolism/genetics/classification ; *Carbon Cycle ; Estuaries ; Soil Microbiology ; }, abstract = {UNLABELLED: The rising atmospheric concentration of CO2 is a major concern to society due to its global warming potential. In soils, CO2-fixing microorganisms are preventing some of the CO2 from entering the atmosphere. Yet, the controls of dark CO2 fixation are rarely studied in situ. Here, we examined the gene and transcript abundance of key genes involved in microbial CO2 fixation along major environmental gradients within estuarine wetlands. A combined multi-omics approach incorporating metabarcoding, deep metagenomic, and metatranscriptomic analyses confirmed that wetland microbiota harbor four out of seven known CO2 fixation pathways, namely, the Calvin cycle, reverse tricarboxylic acid cycle, Wood-Ljungdahl pathway, and reverse glycine pathway. These pathways are transcribed at high frequencies along several environmental gradients, albeit at different levels depending on the environmental niche. Notably, the transcription of the key genes for the reverse tricarboxylic acid cycle was associated with high nitrate concentration, while the transcription of key genes for the Wood-Ljungdahl pathway was favored by reducing, O2-poor conditions. The transcript abundance of the Calvin cycle was favored by niches high in organic matter. Taxonomic assignment of transcripts implied that dark CO2 fixation was mainly linked to a few bacterial phyla, namely, Desulfobacterota, Methylomirabilota, Nitrospirota, Chloroflexota, and Pseudomonadota.<br><br>IMPORTANCE: The increasing concentration of atmospheric CO2 has been identified as the primary driver of climate change and poses a major threat to human society. This work explores the mostly overlooked potential of light-independent CO2 fixation by soil microbes (a.k.a. dark CO2 fixation) in climate change mitigation efforts. Applying a combination of molecular microbial tools, our research provides new insights into the ecological niches where CO2-fixing pathways are most active. By identifying how environmental factors, like oxygen, salinity and organic matter availability, influence these pathways in an estuarine wetland environment, potential strategies for enhancing natural carbon sinks can be developed. The importance of our research is in advancing the understanding of microbial CO2 fixation and its potential role in the global climate system.}, }
@article {pmid39745426, year = {2025}, author = {Gulyaeva, A and Liu, L and Garmaeva, S and Kruk, M and Weersma, RK and Harmsen, HJM and Zhernakova, A}, title = {Identification and characterization of Faecalibacterium prophages rich in diversity-generating retroelements.}, journal = {Microbiology spectrum}, volume = {13}, number = {2}, pages = {e0106624}, pmid = {39745426}, issn = {2165-0497}, mesh = {*Prophages/genetics/isolation &amp; purification/classification ; *Retroelements/genetics ; Humans ; Genome, Viral ; Gastrointestinal Microbiome/genetics ; Metagenomics ; Host Specificity ; Computational Biology/methods ; Virome ; Feces/microbiology ; }, abstract = {Metagenomics has revealed the incredible diversity of phages within the human gut. However, very few of these phages have been subjected to in-depth experimental characterization. One promising method of obtaining novel phages for experimental characterization is through induction of the prophages integrated into the genomes of cultured gut bacteria. Here, we developed a bioinformatic approach to prophage identification that builds on prophage genomic properties, existing prophage-detecting software, and publicly available virome sequencing data. We applied our approach to 22 strains of bacteria belonging to the genus Faecalibacterium, resulting in identification of 15 candidate prophages, and validated the approach by demonstrating the activity of five prophages from four of the strains. The genomes of three active phages were identical or similar to those of known phages, while the other two active phages were not represented in the Viral RefSeq database. Four of the active phages possessed a diversity-generating retroelement (DGR), and one retroelement had two variable regions. DGRs of two phages were active at the time of the induction experiments, as evidenced by nucleotide variation in sequencing reads. We also predicted that the host range of two active phages may include multiple bacterial species. Finally, we noted that four phages were less prevalent in the metagenomes of inflammatory bowel disease patients compared to a general population cohort, a difference mainly explained by differences in the abundance of the host bacteria. Our study highlights the utility of prophage identification and induction for unraveling phage molecular mechanisms and ecological interactions.IMPORTANCEWhile hundreds of thousands of phage genomes have been discovered in metagenomics studies, only a few of these phages have been characterized experimentally. Here, we explore phage characterization through bioinformatic identification of prophages in genomes of cultured bacteria, followed by prophage induction. Using this approach, we detect the activity of five prophages in four strains of commensal gut bacteria Faecalibacterium. We further note that four of the prophages possess diversity-generating retroelements implicated in rapid mutation of phage genome loci associated with phage-host and phage-environment interactions and analyze the intricate patterns of retroelement activity. Our study highlights the potential of prophage characterization for elucidating complex molecular mechanisms employed by the phages.}, }
@article {pmid39745394, year = {2025}, author = {Geers, AU and Michoud, G and Busi, SB and Peter, H and Kohler, TJ and Ezzat, L and ,  and Battin, TJ}, title = {Deciphering the biosynthetic landscape of biofilms in glacier-fed streams.}, journal = {mSystems}, volume = {10}, number = {2}, pages = {e0113724}, pmid = {39745394}, issn = {2379-5077}, support = {//NOMIS Stiftung (NOMIS Foundation)/ ; }, mesh = {*Biofilms/growth &amp; development ; *Rivers/microbiology ; *Microbiota/genetics ; *Ice Cover/microbiology ; *Bacteria/genetics/metabolism/classification ; Multigene Family ; Metagenome ; }, abstract = {UNLABELLED: Glacier-fed streams are permanently cold, ultra-oligotrophic, and physically unstable environments, yet microbial life thrives in benthic biofilm communities. Within biofilms, microorganisms rely on secondary metabolites for communication and competition. However, the diversity and genetic potential of secondary metabolites in glacier-fed stream biofilms remain poorly understood. In this study, we present the first large-scale exploration of biosynthetic gene clusters (BGCs) from benthic glacier-fed stream biofilms sampled by the Vanishing Glaciers project from the world's major mountain ranges. We found a remarkable diversity of BGCs, with more than 8,000 of them identified within 2,868 prokaryotic metagenome-assembled genomes, some of them potentially conferring ecological advantages, such as UV protection and quorum sensing. The BGCs were distinct from those sourced from other aquatic microbiomes, with over 40% of them being novel. The glacier-fed stream BGCs exhibited the highest similarity to BGCs from glacier microbiomes. BGC composition displayed geographic patterns and correlated with prokaryotic alpha diversity. We also found that BGC diversity was positively associated with benthic chlorophyll a and prokaryotic diversity, indicative of more biotic interactions in more extensive biofilms. Our study provides new insights into a hitherto poorly explored microbial ecosystem, which is now changing at a rapid pace as glaciers are shrinking due to climate change.<br><br>IMPORTANCE: Glacier-fed streams are characterized by low temperatures, high turbidity, and high flow. They host a unique microbiome within biofilms, which form the foundation of the food web and contribute significantly to biogeochemical cycles. Our investigation into secondary metabolites, which likely play an important role in these complex ecosystems, found a unique genetic potential distinct from other aquatic environments. We found the potential to synthesize several secondary metabolites, which may confer ecological advantages, such as UV protection and quorum sensing. This biosynthetic diversity was positively associated with the abundance and complexity of the microbial community, as well as concentrations of chlorophyll a. In the face of climate change, our study offers new insights into a vanishing ecosystem.}, }
@article {pmid39744910, year = {2024}, author = {de Moura Barbosa Leite, D and de Paula, TS and Hajdu, E}, title = {The complete mitochondrial genome of the deep-sea methanotrophic sponges Hymedesmia methanophila and Iophon methanophila: leveraging 'waste' in metagenomic data.}, journal = {Journal of genetics}, volume = {103}, number = {}, pages = {}, pmid = {39744910}, issn = {0973-7731}, mesh = {*Genome, Mitochondrial ; Animals ; *Porifera/microbiology/genetics ; *Phylogeny ; *Metagenomics/methods ; Methane/metabolism ; Metagenome ; High-Throughput Nucleotide Sequencing ; DNA, Mitochondrial/genetics ; RNA, Transfer/genetics ; }, abstract = {A significant proportion of next-generation sequencing (NGS) data ends up not being used since they comprise information out-of-scope of the primary studies. This 'waste' of potential can be harnessed to explore organellar genomes, such as the mitochondrial DNA, and be used for evolutionary, conservation and biodiversity research. We present the complete mitochondrial genomes of the deep-sea methanotrophic sponges Hymedesmia methanophila and Iophon methanophila (Demospongiae, Poecilosclerida) retrieved from previously published whole metagenome sequencing data. The predicted mitogenome of H. methanophila (18,657 bp) and I. methanophila (18,718 bp) present the characteristic arrangement observed among Poecilosclerida sponges. These mtDNAs encode the usual set of 14 proteins, two ribosomal RNA, and 24 or 23 transfer RNA genes, respectively, with intergenic regions amounting ~5% of their total length. The overall similarity of these mitogenomes to those of phylogenetic relatives, both in organization and divergence, suggests that neither their extremophilic habitat in asphalt seeps within the deep sea nor their symbiotic association with methaneoxidizing bacteria imposed a major influence on the evolution of their mitochondrial genome. This research shows how metagenomic data can be leveraged to extract additional genetic knowledge from primary metagenome sources, and by exploiting previously unexplored sequencing data, valuable information can be unlocked to shed light on the evolutionary dynamics of diverse organisms inhabiting extreme environments.}, }
@article {pmid39744158, year = {2024}, author = {Jiménez-Arroyo, C and Molinero, N and Sabater, C and Margolles, A and Terrón-Camero, LC and Andrés-León, E and Ramos, M and Del Val, M and Moreno-Arribas, MV}, title = {Gut microbiome and clinical and lifestyle host factors associated with recurrent positive RT-PCR for SARS-CoV-2.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1494193}, pmid = {39744158}, issn = {2235-2988}, mesh = {Humans ; *COVID-19/microbiology/virology/diagnosis ; *Gastrointestinal Microbiome/genetics ; *SARS-CoV-2/genetics/isolation &amp; purification ; Male ; Female ; Middle Aged ; *Feces/microbiology/virology ; Adult ; Metagenomics/methods ; Life Style ; Aged ; }, abstract = {BACKGROUND: SARS-CoV-2 and COVID-19 are still active in the population. Some patients remained PCR-positive for more than 4 weeks, called "persistently PCR-positive". Recent evidence suggests a link between the gut microbiota and susceptibility to COVID-19, although no studies have explored persistent PCR conditions. We aimed to evaluate the relationship between persistent positive SARS-CoV-2 RT-PCR, the gut microbiome, and individual host determinants.<br><br>METHODS: A shotgun metagenomic analysis was conducted on fecal samples from 28 individuals affected by COVID-19. Patients were divided into two groups: those who had cleared the virus within 30 days (designated as the control group) (n = 15), and those who remained PCR-positive beyond 30 days (called the PCR+ group) (n = 13). We also investigated the correlation between prolonged viral clearance and several additional factors, including clinical parameters, immune responses, microbial metabolites, and dietary habits.<br><br>RESULTS: The composition and functionality of the microbiome varied based on the duration of positivity as determined by PCR. Compared to the control group, the persistent PCR+ group exhibited elevated pathogen levels and augmented diversity in functional gene families (p-value < 0.05). A multi-omics analysis integrating metagenomics, metabolites, and metadata also revealed the specific contribution of certain blood markers in this group, including basophils, IgM, IgG (both general and specific for SARS-CoV-2), and markers of liver damage. Unhealthy diet was identified as a significant factor influencing the duration of PCR positivity.<br><br>CONCLUSIONS: These findings indicate that the gut microbiome may play a role in delayed viral clearance and persistent positive RT-PCR results. Our study also contributes to the understanding of the role of host factors as mediators linking the gut microbiota and disease outcomes. Further large-scale studies must confirm these data; however, they suggest the relevance of monitoring microbiome changes in the early post-viral years to control SARS-CoV-2 and providing individual healthcare support.}, }
@article {pmid39743584, year = {2025}, author = {Ezzat, L and Peter, H and Bourquin, M and Busi, SB and Michoud, G and Fodelianakis, S and Kohler, TJ and Lamy, T and Geers, A and Pramateftaki, P and Baier, F and Marasco, R and Daffonchio, D and Deluigi, N and Wilmes, P and Styllas, M and Schön, M and Tolosano, M and De Staercke, V and Battin, TJ}, title = {Diversity and biogeography of the bacterial microbiome in glacier-fed streams.}, journal = {Nature}, volume = {637}, number = {8046}, pages = {622-630}, pmid = {39743584}, issn = {1476-4687}, mesh = {*Ice Cover/microbiology ; *Microbiota/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; *Rivers/microbiology ; Phylogeny ; *Biodiversity ; Phylogeography ; Metagenomics ; Climate Change ; }, abstract = {The rapid melting of mountain glaciers and the vanishing of their streams is emblematic of climate change[1,2]. Glacier-fed streams (GFSs) are cold, oligotrophic and unstable ecosystems in which life is dominated by microbial biofilms[2,3]. However, current knowledge on the GFS microbiome is scarce[4,5], precluding an understanding of its response to glacier shrinkage. Here, by leveraging metabarcoding and metagenomics, we provide a comprehensive survey of bacteria in the benthic microbiome across 152 GFSs draining the Earth's major mountain ranges. We find that the GFS bacterial microbiome is taxonomically and functionally distinct from other cryospheric microbiomes. GFS bacteria are diverse, with more than half being specific to a given mountain range, some unique to single GFSs and a few cosmopolitan and abundant. We show how geographic isolation and environmental selection shape their biogeography, which is characterized by distinct compositional patterns between mountain ranges and hemispheres. Phylogenetic analyses furthermore uncovered microdiverse clades resulting from environmental selection, probably promoting functional resilience and contributing to GFS bacterial biodiversity and biogeography. Climate-induced glacier shrinkage puts this unique microbiome at risk. Our study provides a global reference for future climate-change microbiology studies on the vanishing GFS ecosystem.}, }
@article {pmid39743194, year = {2025}, author = {Ye, G and Chen, G and Avellán-Llaguno, RD and Cao, Y and Huang, Q}, title = {Distinctive gut antibiotic resistome, potential health risks and underlying pathways upon cerebral ischemia-reperfusion injury.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {367}, number = {}, pages = {125614}, doi = {10.1016/j.envpol.2024.125614}, pmid = {39743194}, issn = {1873-6424}, mesh = {*Gastrointestinal Microbiome ; *Anti-Bacterial Agents/pharmacology ; Animals ; *Reperfusion Injury/microbiology ; *Drug Resistance, Microbial/genetics ; *Brain Ischemia ; Humans ; }, abstract = {Antibiotic resistance genes (ARGs) as emerging pollutants pose health risks to humans and the environment. Gut microbiota is an important reservoir for ARGs and hotspot for ARG acquisition and dissemination. Non-antibiotic factors (such as disease pathophysiology) affect ARG emergence and dissemination. Cerebral ischemia-reperfusion injury (I/R) commonly occurs in stroke patients. However, effects of I/R on ARG emergence and dissemination are unknown. Therefore, metagenomics was used to unveil selective collection of gut antibiotic resistome and its health risks, key ARG hosts and underlying pathways upon I/R. Changes in gut antibiotic resistome upon I/R were characterized by tetracycline ARG accumulation and decreases in aminoglycoside and glycopeptide ARGs. Besides, changes in gut antibiotic resistome were corrected with those in gut microbiota from phylum to species, serum lipid accumulation and glucose depletion upon I/R. Additionally, health risks of gut microbial multidrug ARGs (such as abem, adek and TolC), macA, aph(3')-I and carO, co-localized with mobile gene elements, were increased upon I/R. Moreover, phyla Firmicutes (especially order Eubacteriales, class Clostridia) and Bacteroidota were key ARG hosts in gut microbiota of I/R gerbils. Furthermore, suppression of vancomycin resistance, and lantibiotic biosynthesis and immunity, disturbances in peptidoglycan biosynthesis and hydrolysis, activation of antimicrobial peptide resistance, lipopolysaccharide biosynthesis, teichoic acid biosynthesis, arabinogalactan biosynthesis, aromatic compound degradation, oxidative phosphorylation, the tricarboxylic acid cycle and its anaplerotic pathways were observed in upon I/R. This study provides novel insights and intervention targets related to selective collection of gut antibiotic resistome and its potential health risks upon I/R.}, }
@article {pmid39742975, year = {2025}, author = {Dougherty, PE and Pedersen, MS and Forero-Junco, LM and Carstens, AB and Raaijmakers, JM and Riber, L and Hansen, LH}, title = {Novel bacteriophages targeting wheat phyllosphere bacteria carry DNA modifications and single-strand breaks.}, journal = {Virus research}, volume = {352}, number = {}, pages = {199524}, pmid = {39742975}, issn = {1872-7492}, mesh = {*Triticum/microbiology/virology ; Phylogeny ; *Bacteriophages/genetics/classification/isolation &amp; purification ; *Erwinia/virology ; Genome, Viral ; *Pseudomonas/virology ; DNA, Viral/genetics ; Microbiota ; Plant Leaves/microbiology ; Metagenome ; }, abstract = {The phyllosphere microbiome can positively or negatively impact plant health and growth, but we currently lack the tools to control microbiome composition. Contributing to a growing collection of bacteriophages (phages) targeting bacteria living in the wheat phyllosphere, we here isolate and sequence eight novel phages targeting common phyllosphere Erwinia and Pseudomonas strains, including two jumbo phages. We characterize genomic, phylogenetic, and morphological traits from these phages and argue for establishing four novel viral genera. We also search the genomes for anti-defense systems and investigate DNA modifications using Nanopore sequencing. In Pseudomonas phage Rembedalsseter we find evidence of 13 motif-associated single-stranded DNA breaks. A bioinformatics search revealed that 60 related Pseudomonas phages are enriched in the same motif, suggesting these single-stranded nicks may be widely distributed in this family of phages. Finally, we also search the Sequence Read Archive for similar phages in public metagenomes. We find close hits to the Erwinia jumbo-phage Kaldavass in a wide variety of plant, food, and wastewater metagenomes including a near-perfect hit from a Spanish spinach sample, illustrating how interconnected geographically distant phages can be.}, }
@article {pmid39742897, year = {2025}, author = {Jumaylawee, HRH and Komijani, M and Shahrjerdi, S and Sargolzaei, J}, title = {The interplay of gut microbiota and heavy metals in multiple sclerosis patients.}, journal = {Microbial pathogenesis}, volume = {199}, number = {}, pages = {107269}, doi = {10.1016/j.micpath.2024.107269}, pmid = {39742897}, issn = {1096-1208}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Metals, Heavy/analysis ; *Multiple Sclerosis/microbiology ; Feces/chemistry/microbiology ; Adult ; Male ; Female ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Bacteria/classification/genetics/isolation &amp; purification ; Interleukin-10/blood ; Metagenomics ; Mass Spectrometry ; }, abstract = {Multiple Sclerosis (MS) is a chronic inflammatory disease characterized by central nervous system (CNS). In this study, the concentration of heavy metals was measured in stool samples of MS patients by Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS) method and compared with healthy people. Also, another goal of this study is to investigate the alteration of the gut microbiome of MS patients by metagenomics technique based on the 16S rRNA gene sequencing. The IL-10 ELISA assay showed no significant differences between the serum level of the IL-10 in the patients and the control group (p = 0.510). Heavy metal measurement by ICP-MS showed significantly higher levels of arsenic (As, Mean = 32.77 μg/kg), nickel (Ni, Mean = 7.154 μg/kg), manganese (Mn, Mean = 3723 μg/kg), and zinc (Zn, Mean = 5508 μg/kg) in the stool samples of the MS group compared to the control group, while concentrations of iron (Fe, Mean = 9585 μg/kg), lead (Pb, Mean = 18.54 μg/kg), titanium (Ti, Mean = 69.69 μg/kg), and tin (Sn, Mean = 13.92 μg/kg) were significantly lower. The result of gut microbiome analysis showed an increase in the abundance of the Verrumicrobiaceae, Lachnospiraceae and Ruminococcaceae families was considerably increased in MS patients compared to the control group (p < 0.05). This study reports that high levels of heavy metals such as Ars, Ni, Mn, and Zn, deficiency of Fe, Pb, Ti, and Sn, and alteration of the gut microbiome are involved in the pathogenesis of MS. The novelty of this study lies in its multi-faceted approach to understanding MS by integrating the measurement of heavy metals in stool samples with the analysis of gut microbiome alterations, thereby providing comprehensive insights into heavy metals, the gut microbiome, and potential therapeutic avenues. This study suggests several potential applications and practical implications based on its findings regarding heavy metals, gut microbiome alterations, and IL-10 levels in MS. First, the identification of elevated levels of specific heavy metals and deficiencies in others may lead to targeted screening and monitoring, informing preventive strategies for MS patients. Additionally, the observed gut microbiome changes could facilitate the development of microbiome-based therapies, such as probiotics or dietary interventions, aimed at restoring microbial balance. Finally, exploring the interplay between heavy metals, gut microbiome, and immune response may guide the creation of novel therapeutic interventions, ultimately enhancing treatment efficacy and providing new avenues for managing MS, thereby alleviating the burden of this chronic condition.}, }
@article {pmid39742816, year = {2025}, author = {Li, L and Nielsen, J and Chen, Y}, title = {Personalized gut microbial community modeling by leveraging genome-scale metabolic models and metagenomics.}, journal = {Current opinion in biotechnology}, volume = {91}, number = {}, pages = {103248}, doi = {10.1016/j.copbio.2024.103248}, pmid = {39742816}, issn = {1879-0429}, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; *Metagenomics ; *Precision Medicine ; *Models, Biological ; }, abstract = {The impact of the gut microbiome on human health is increasingly recognized as dysbiosis has been found to be associated with a spectrum of diseases. Here, we review the databases of genome-scale metabolic models (GEMs), which have paved the way for investigations into the metabolic capabilities of gut microbes and their interspecies dynamics. We further discuss the strategies for developing community-level GEMs, which are crucial for understanding the complex interactions within microbial communities and between the microbiome and its host. Such GEMs can guide the design of synthetic microbial communities for disease treatment. Finally, we explore advances in personalized gut microbiome modeling. These advancements broaden our mechanistic understanding and hold promise for applications in precision medicine and therapeutic interventions.}, }
@article {pmid39741524, year = {2024}, author = {Khatiebi, S and Kiprotich, K and Onyando, Z and Mwaura, J and Wekesa, C and Chi, CN and Mulambalah, C and Okoth, P}, title = {High-Throughput Shotgun Metagenomics of Microbial Footprints Uncovers a Cocktail of Noxious Antibiotic Resistance Genes in the Winam Gulf of Lake Victoria, Kenya.}, journal = {Journal of tropical medicine}, volume = {2024}, number = {}, pages = {7857069}, pmid = {39741524}, issn = {1687-9686}, abstract = {Background: A diverse range of pollutants, including heavy metals, agrochemicals, pharmaceutical residues, illicit drugs, personal care products, and other anthropogenic contaminants, pose a significant threat to aquatic ecosystems. The Winam Gulf of Lake Victoria, heavily impacted by surrounding human activities, faces potential contamination from these pollutants. However, studies exploring the presence of antibiotic resistance genes (ARGs) in the lake remain limited. In the current study, a shotgun metagenomics approach was employed to identify ARGs and related pathways. Genomic DNA was extracted from water and sediment samples and sequenced using the high-throughput Illumina NovaSeq platform. Additionally, phenotypic antibiotic resistance was assessed using the disk diffusion method with commonly used antibiotics. Results: The analysis of metagenomes sequences from the Gulf ecosystem and Comprehensive Antibiotic Resistance Database (CARD) revealed worrying levels of ARGs in the lake. The study reported nine ARGs from the 37 high-risk resistant gene families previously documented by the World Health Organization (WHO). Proteobacteria had the highest relative abundance of antibiotic resistance (53%), Bacteriodes (4%), Verrucomicrobia (2%), Planctomycetes Chloroflexi, Firmicutes (2%), and other unclassified bacteria (39%). Genes that target protection, replacement, change, and antibiotic-resistant efflux were listed in order of dominance. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis revealed antibiotic resistance to beta-lactamase and vancomycin. Phenotypic resistance to vancomycin, tetracycline, sulfamethoxazole, erythromycin, trimethoprim, tetracycline, and penicillin was reported through the zone of inhibition. Conclusions: This study highlights that the Winam Gulf of Lake Victoria in Kenya harbors a diverse array of antibiotic-resistant genes, including those conferring multidrug resistance. These findings suggest that the Gulf could be serving as a reservoir for more antibiotic-resistant genes, posing potential risks to both human health and aquatic biodiversity. The insights gained from this research can guide policy development for managing antibiotic resistance in Kenya.}, }
@article {pmid39741321, year = {2024}, author = {Shao, L and Cai, G and Fu, J and Zhang, W and Ye, Y and Ling, Z and Ye, S}, title = {Gut microbial 'TNFα-sphingolipids-steroid hormones' axis in children with autism spectrum disorder: an insight from meta-omics analysis.}, journal = {Journal of translational medicine}, volume = {22}, number = {1}, pages = {1165}, pmid = {39741321}, issn = {1479-5876}, support = {LY22C010001//Natural Science Foundation of Zhejiang Province/ ; 2022KY1451//Zhejiang Provincial Medical and Health Science and Technology Plan/ ; 2022KY971//Zhejiang Provincial Medical and Health Science and Technology Plan/ ; 31870839//National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Autism Spectrum Disorder/microbiology/blood/metabolism ; *Gastrointestinal Microbiome ; *Tumor Necrosis Factor-alpha/metabolism/blood ; *Sphingolipids/blood/metabolism ; Child ; *Steroids/blood/metabolism ; Metabolomics ; Male ; Female ; Hormones/blood/metabolism ; Metagenomics ; Child, Preschool ; Dysbiosis/microbiology ; Feces/microbiology ; }, abstract = {BACKGROUND: Autism spectrum disorder (ASD) is a persistent neurodevelopmental disorder affecting brains of children. Mounting evidences support the associations between gut microbial dysbiosis and ASD, whereas detailed mechanisms are still obscure.<br><br>METHODS: Here we probed the potential roles of gut microbiome in ASD using fecal metagenomics and metabolomics.<br><br>RESULTS: Children with ASD were found to be associated with augmented serum cytokines milieu, especially TNF&#x3b1;. Metagenomic analysis generated 29 differential species and 18 dysregulated functional pathways such as Bifidobacterium bifidum, Segatella copri, and upregulated 'Sphingolipid metabolism' in children with ASD. Metabolomics revealed steroid hormone dysgenesis in children with ASD with lower abundances of metabolites such as estriol, estradiol and deoxycorticosterone. A three-way association analysis showed positive correlations between TNF&#x3b1; and microbial function potentials such as 'Bacterial toxins' and 'Lysosome', indicating the contribution of microbial dysbiosis to neuroinflammation. TNF&#x3b1; also correlated positively with 'Sphingolipid metabolism', which further showed negative correlations with metabolites estriol and deoxycorticosterone. Such results, in consistent with current findings, revealed the contribution of increased TNF&#x3b1; to upregulated sphingolipid metabolism, which further impaired steroid hormone biosynthesis.<br><br>CONCLUSION: Our study proposed the gut microbial 'TNF&#x3b1;-sphingolipids-steroid hormones' axis in children with ASD, which may provide new perspectives for developing gut microbiome-based treatments in the future.}, }
@article {pmid39740461, year = {2025}, author = {Rana, S and Pandey, H and Shridhar, V and Tiwary, P and Kukreti, S and Arunachalam, K and Singh, V}, title = {Structural and functional analysis of rhizospheric bacterial diversity in the Pranmati basin, Himalayan critical zone observatory.}, journal = {Journal of environmental management}, volume = {373}, number = {}, pages = {123872}, doi = {10.1016/j.jenvman.2024.123872}, pmid = {39740461}, issn = {1095-8630}, mesh = {*Soil Microbiology ; *Rhizosphere ; *Bacteria/classification ; Biodiversity ; Soil/chemistry ; Ecosystem ; Microbiota ; Quercus ; Plant Roots/microbiology ; Forests ; }, abstract = {The study explores the structural and functional dynamics of rhizospheric bacterial diversity in the Pranmati basin, focusing on their ecological significance, diversity, and functional roles across dominant vegetation types; Rhododendron arboreum, Myrica esculenta, and Quercus leucotrichophora. The research provides critical insights into soil health and ecosystem functioning by analysing rhizospheric soil properties among the selected vegetations. The research findings reveal that Myrica esculenta exhibits the highest root colonization (95.8%) and moisture content (92.6%), while Quercus leucotrichophora shows the lowest (76.2% and 83.2%), respectively. The microbial community is predominantly composed of Proteobacteria, with 62-65% abundance across different vegetation types. Key genera such as Bacillus, Acinetobacter, and Paenibacillus are notably enriched, highlighting their significant role in phosphate solubilization and nutrient cycling. Venn diagram analysis identified 136 common bacterial species among vegetation types reflecting ecological significance in forest ecosystem. The functional metabolism, diversity indices, and core microbiome analysis underscore the distinct microbial profiles associated with different vegetation types, which are crucial for overall forest soil health. The importance of this research lies in its contribution to environmental management by providing a comprehensive understanding of how microbial communities interact with various vegetation types and influence soil health in the Pranmati basin. These insights are essential for developing targeted strategies to enhance soil fertility and manage forest ecosystems in terms of conservation and restoration efforts in sensitive ecological regions. This study is pioneer as it establishes a functional analysis of rhizospheric bacterial diversity in the Pranmati basin, offering a baseline data for future research on bacterial community structure and their functional role in Himalayan Critical Zone Observatory to the best of our knowledge.}, }
@article {pmid39739308, year = {2024}, author = {Chaabane, F and Pillonel, T and Bertelli, C}, title = {MeSS and assembly_finder: a toolkit for in silico metagenomic sample generation.}, journal = {Bioinformatics (Oxford, England)}, volume = {41}, number = {1}, pages = {}, pmid = {39739308}, issn = {1367-4811}, mesh = {*Metagenomics/methods ; *Software ; Computer Simulation ; Microbiota/genetics ; Metagenome ; Computational Biology/methods ; }, abstract = {SUMMARY: The intrinsic complexity of the microbiota combined with technical variability render shotgun metagenomics challenging to analyze for routine clinical or research applications. In silico data generation offers a controlled environment allowing for example to benchmark bioinformatics tools, to optimize study design, statistical power, or to validate targeted applications. Here, we propose assembly_finder and the Metagenomic Sequence Simulator (MeSS), two easy-to-use Bioconda packages, as part of a benchmarking toolkit to download genomes and simulate shotgun metagenomics samples, respectively. Outperforming existing tools in speed while requiring less memory, MeSS reproducibly generates accurate complex communities based on a list of taxonomic ranks and their abundance.<br><br>All code is released under MIT License and is available on https://github.com/metagenlab/MeSS and https://github.com/metagenlab/assembly_finder.}, }
@article {pmid39738315, year = {2024}, author = {Ecklu-Mensah, G and Miller, R and Maseng, MG and Hawes, V and Hinz, D and Kim, C and Gilbert, JA}, title = {Modulating the human gut microbiome and health markers through kombucha consumption: a controlled clinical study.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {31647}, pmid = {39738315}, issn = {2045-2322}, support = {S10 OD026929/OD/NIH HHS/United States ; }, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; *Biomarkers ; Diet, Western/adverse effects ; Feces/microbiology ; *Gastrointestinal Microbiome ; Probiotics/administration &amp; dosage ; Kombucha Tea ; Cholesterol, HDL/blood ; Insulin Resistance ; Inflammation ; }, abstract = {Fermented foods are becoming more popular due to their purported links to metabolic health and the gut microbiome. However, direct clinical evidence for the health claims is lacking. Here, we describe an eight-week clinical trial that explored the effects of a four-week kombucha supplement in healthy individuals consuming a Western diet, randomized into the kombucha (n = 16) or control (n = 8) group. We collected longitudinal stool and blood samples to profile the human microbiome and inflammation markers. We did not observe significant changes in either biochemical parameters or levels of circulating markers of inflammation across the entire cohort. However, paired analysis between baseline and end of intervention time points within kombucha or control groups revealed increases in fasting insulin and in HOMA-IR in the kombucha group whereas reductions in HDL cholesterol were associated with the control group. Shotgun metagenomic analysis revealed the relative abundance of Weizmannia, a kombucha-enriched probiotic and several SCFA producing taxa to be overrepresented in consumers at the end of the intervention. Collectively, in our healthy cohort consuming a Western diet, a short-term kombucha intervention induced modest impacts on human gut microbiome composition and biochemical parameters, which may be attributed to relatively small number of participants and the extensive inter-participant variability.}, }
@article {pmid39738309, year = {2024}, author = {Tawfiq, R and Niu, K and Hoehndorf, R and Kulmanov, M}, title = {DeepGOMeta for functional insights into microbial communities using deep learning-based protein function prediction.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {31813}, pmid = {39738309}, issn = {2045-2322}, support = {URF/1/4675-01-01, URF/1/4355-01- 01, URF/1/4697-01-01, URF/1/5041-01- 01, REI/1/5334-01-01, FCC/1/1976-46-01, and FCC/1/1976- 34-01//King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)/ ; URF/1/4675-01-01, URF/1/4355-01- 01, URF/1/4697-01-01, URF/1/5041-01- 01, REI/1/5334-01-01, FCC/1/1976-46-01, and FCC/1/1976- 34-01//King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)/ ; URF/1/4675-01-01, URF/1/4355-01- 01, URF/1/4697-01-01, URF/1/5041-01- 01, REI/1/5334-01-01, FCC/1/1976-46-01, and FCC/1/1976- 34-01//King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)/ ; URF/1/4675-01-01, URF/1/4355-01- 01, URF/1/4697-01-01, URF/1/5041-01- 01, REI/1/5334-01-01, FCC/1/1976-46-01, and FCC/1/1976- 34-01//King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)/ ; }, mesh = {*Deep Learning ; *Microbiota ; Gene Ontology ; Computational Biology/methods ; Proteins/metabolism ; Bacteria/metabolism/genetics ; Bacterial Proteins/metabolism/genetics ; Software ; }, abstract = {Analyzing microbial samples remains computationally challenging due to their diversity and complexity. The lack of robust de novo protein function prediction methods exacerbates the difficulty in deriving functional insights from these samples. Traditional prediction methods, dependent on homology and sequence similarity, often fail to predict functions for novel proteins and proteins without known homologs. Moreover, most of these methods have been trained on largely eukaryotic data, and have not been evaluated on or applied to microbial datasets. This research introduces DeepGOMeta, a deep learning model designed for protein function prediction as Gene Ontology (GO) terms, trained on a dataset relevant to microbes. The model is applied to diverse microbial datasets to demonstrate its use for gaining biological insights. Data and code are available at https://github.com/bio-ontology-research-group/deepgometa.}, }
@article {pmid39738126, year = {2024}, author = {Zhang, S and Song, W and Marinos, G and Waschina, S and Zimmermann, J and Kaleta, C and Thomas, T}, title = {Genome-scale metabolic modelling reveals interactions and key roles of symbiont clades in a sponge holobiont.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {10858}, pmid = {39738126}, issn = {2041-1723}, mesh = {*Symbiosis ; *Porifera/microbiology/metabolism ; Animals ; *Microbiota/genetics ; *Metabolic Networks and Pathways/genetics ; Bacteria/metabolism/genetics/classification ; Phylogeny ; Genome ; Genome, Bacterial ; Models, Biological ; Metagenomics/methods ; }, abstract = {Sponges harbour complex microbiomes and as ancient metazoans and important ecosystem players are emerging as powerful models to understand the evolution and ecology of symbiotic interactions. Metagenomic studies have previously described the functional features of sponge symbionts, however, little is known about the metabolic interactions and processes that occur under different environmental conditions. To address this issue, we construct here constraint-based, genome-scale metabolic networks for the microbiome of the sponge Stylissa sp. Our models define the importance of sponge-derived nutrients for microbiome stability and discover how different organic inputs can result in net heterotrophy or autotrophy of the symbiont community. The analysis further reveals the key role that a newly discovered bacterial taxon has in cross-feeding activities and how it dynamically adjusts with nutrient inputs. Our study reveals insights into the functioning of a sponge microbiome and provides a framework to further explore and define metabolic interactions in holobionts.}, }
@article {pmid39733577, year = {2025}, author = {Heisi, HD and Nkuna, R and Matambo, T}, title = {Rhizosphere microbial community structure and PICRUSt2 predicted metagenomes function in heavy metal contaminated sites: A case study of the Blesbokspruit wetland.}, journal = {The Science of the total environment}, volume = {959}, number = {}, pages = {178147}, doi = {10.1016/j.scitotenv.2024.178147}, pmid = {39733577}, issn = {1879-1026}, mesh = {*Wetlands ; *Metals, Heavy/analysis/metabolism ; *Rhizosphere ; *Microbiota ; *Metagenome ; Eichhornia/microbiology ; South Africa ; Biodegradation, Environmental ; *Soil Pollutants/analysis ; *Water Pollutants, Chemical/analysis/metabolism ; Typhaceae/microbiology ; Bacteria ; Poaceae/microbiology ; *Soil Microbiology ; Environmental Monitoring ; }, abstract = {This study investigated the microbial diversity inhabiting the roots (rhizosphere) of macrophytes thriving along the Blesbokspruit wetland, South Africa's least conserved Ramsar site. The wetland suffers from decades of pollution from mining wastewater, agriculture, and sewage. The current study focused on three macrophytes: Phragmites australis (common reed), Typha capensis (bulrush), and Eichhornia crassipes (water hyacinth). The results revealed a greater abundance and diversity of microbes (Bacteria and Fungi) associated with the free-floating E. crassipes compared to P. australis and T. capensis. Furthermore, the correlation between microbial abundance and metals, showed a strong correlation between fungal communities and metals such as nickel (Ni) and arsenic (As), while bacterial communities correlated more with lead (Pb) and chromium (Cr). The functional analysis predicted by PICRUSt2 identified genes related to xenobiotic degradation, suggesting the potential of these microbes to break down pollutants. Moreover, specific bacterial groups - Proteobacteria, Verrucomicrobia, Cyanobacteria, and Bacteroidetes - were linked to this degradation pathway. These findings suggest a promising avenue for microbe-assisted phytoremediation, a technique that utilizes plants and their associated microbes to decontaminate polluted environments.}, }
@article {pmid39732868, year = {2024}, author = {Liu, Y and Wang, F and Zhou, Z and Liu, B and Wu, Z and Pan, X}, title = {Profiling and comprehensive analysis of microbiome and ARGs of nurses and nursing workers in China: a cross-sectional study.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {31301}, pmid = {39732868}, issn = {2045-2322}, support = {2018YFC2000500//National Key Research and Development Program of China/ ; }, mesh = {Humans ; Cross-Sectional Studies ; China/epidemiology ; *Nurses ; *Microbiota/genetics ; Female ; Adult ; Male ; Feces/microbiology ; Cross Infection/microbiology/epidemiology ; Gastrointestinal Microbiome ; Hand/microbiology ; Bacteria/genetics/isolation &amp; purification/drug effects/classification ; Metagenomics/methods ; Hand Hygiene ; }, abstract = {Hospital-acquired infection (HAI) and antimicrobial resistance (AMR) represent major challenges in healthcare system. Despite numerous studies have assessed environmental and patient samples, very few studies have explored the microbiome and resistome profiles of medical staff including nursing workers. This cross-sectional study was performed in a tertiary hospital in China and involved 25 nurses (NSs), 25 nursing workers (NWs), and 55 non-medical control (NC). Stool samples from all participants and hand samples (i.e., the microbiome sample from hand skin, which were collected by swabbing both hands with a sponge-swab soaked with neutralized buffer and centrifuging the liquid buffer) from NSs and NWs were collected for metagenomic analysis. Metagenomic analysis revealed that medical staff exhibited lower abundances of beneficial species such as Blautia, and Bifidobacterium in the gut microbiome. However, an important potential pathogen, Staphylococcus haemolyticus, was enriched in the hands of NWs, suggesting a considerable prevalence of pathogenesis and multi-drug resistance. Accordantly, ARG analysis revealed worse hand hygiene among NWs than among NSs, characterized by a higher diversity of ARGs and a higher abundance of ARGs conferring multi-drug resistance including mdtF, acrB, AcrF and evgS. This study provides a comprehensive overview of the microbial and ARG profiles in the gut and hands of NSs and NWs. The higher abundance of potential pathogens and diverse multi-drug resistant ARGs in NWs hands indicates insufficient hand hygiene and a higher risk of HAI in this subgroup. This study is the first to highlight the critical need to improve hand hygiene among NWs, thus mitigating the risks of AMR and HAI.}, }
@article {pmid39732792, year = {2024}, author = {Pan, J and Zhang, X and Shi, D and Tian, X and Xu, L and Lu, X and Dong, M and Yao, P and Pan, Z and Ling, Z and Wu, N and Yao, H}, title = {Short-chain fatty acids play a key role in antibody response to SARS-CoV-2 infection in people living with HIV.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {31211}, pmid = {39732792}, issn = {2045-2322}, support = {SYS202202//Shandong Provincial Laboratory Project/ ; 2022ZFJH003//Fundamental Research Funds for the Central Universities/ ; 2022R52029//Zhejiang Plan for the Special Support for Top-notch Talents/ ; }, mesh = {Humans ; *Fatty Acids, Volatile/metabolism ; *Gastrointestinal Microbiome/immunology ; *HIV Infections/immunology/virology/microbiology ; *COVID-19/immunology/blood/virology ; *SARS-CoV-2/immunology ; Male ; Female ; Middle Aged ; *Antibodies, Viral/blood/immunology ; Adult ; Antibody Formation/immunology ; }, abstract = {High SARS-CoV-2-specific antibody levels can protect against SARS-CoV-2 reinfection. The gut microbiome can affect a host's immune response. However, its role in the antibody response to SARS-CoV-2 in people living with HIV (PLWH) remains poorly understood. Here, we categorised PLWH and healthy individuals into high- and low-antibody-response groups. Shotgun metagenomic sequencing and targeted metabolomic assays were used to investigate the differences in the gut microbiome and metabolic functions between the high- and low-antibody-response groups. PLWH demonstrated a higher abundance of short-chain fatty acid (SCFA)-producing species, accompanied by high serum levels of several SCFAs, in the high-antibody-response group than in the low-antibody-response group. In contrast, healthy individuals demonstrated higher enrichment of pilus-bearing bacterial species, with flagella-expressing genes, in the high-antibody-response group than in the low-antibody-response group. Therefore, gut-microbiota-derived SCFAs play a key role in antibody responses in PLWH but not in healthy individuals. Our results afford a novel understanding of how the gut microbiome and its metabolites are associated with host immunity. Moreover, they may facilitate the exploration of modalities to prevent SARS-CoV-2 reinfection through various gut-microbiota-targeted interventions tailored to different populations.}, }
@article {pmid39732609, year = {2025}, author = {Tegegne, HA and Savidge, TC}, title = {Leveraging human microbiomes for disease prediction and treatment.}, journal = {Trends in pharmacological sciences}, volume = {46}, number = {1}, pages = {32-44}, pmid = {39732609}, issn = {1873-3735}, support = {P01 AI152999/AI/NIAID NIH HHS/United States ; T32 AI141349/AI/NIAID NIH HHS/United States ; R01 NR013497/NR/NINR NIH HHS/United States ; P30 DK056338/DK/NIDDK NIH HHS/United States ; R01 DK130517/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; Humans ; Computational Biology ; Metagenomics ; *Microbiota ; Precision Medicine/methods ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The human microbiome consists of diverse microorganisms that inhabit various body sites. As these microbes are increasingly recognized as key determinants of health, there is significant interest in leveraging individual microbiome profiles for early disease detection, prevention, and drug efficacy prediction. However, the complexity of microbiome data, coupled with conflicting study outcomes, has hindered its integration into clinical practice. This challenge is partially due to demographic and technological biases that impede the development of reliable disease classifiers. Here, we examine recent advances in 16S rRNA and shotgun-metagenomics sequencing, along with bioinformatics tools designed to enhance microbiome data integration for precision diagnostics and personalized treatments. We also highlight progress in microbiome-based therapies and address the challenges of establishing causality to ensure robust diagnostics and effective treatments for complex diseases.}, }
@article {pmid39732438, year = {2025}, author = {Alhasani, AT and Modasia, AA and Anodiyil, M and Corsetti, M and Aliyu, AI and Crooks, C and Marciani, L and Reid, J and Yakubov, GE and Taylor, M and Avery, A and Harris, H and Warren, FJ and Spiller, RC}, title = {Mode of Action of Psyllium in Reducing Gas Production from Inulin and its Interaction with Colonic Microbiota: A 24-hour, Randomized, Placebo-Controlled Trial in Healthy Human Volunteers.}, journal = {The Journal of nutrition}, volume = {155}, number = {3}, pages = {839-848}, pmid = {39732438}, issn = {1541-6100}, mesh = {Humans ; *Inulin/metabolism/administration &amp; dosage ; *Psyllium/pharmacology/administration &amp; dosage ; Male ; Adult ; *Colon/microbiology/drug effects/metabolism ; Female ; Fermentation ; Cross-Over Studies ; Single-Blind Method ; Young Adult ; Middle Aged ; *Gastrointestinal Microbiome/drug effects ; Hydrogen/metabolism ; Feces/microbiology ; Healthy Volunteers ; Breath Tests ; }, abstract = {BACKGROUND: Recent studies show that the increase in breath hydrogen (BH2) and symptoms after ingestion of inulin are reduced by coadministering psyllium (PI).<br><br>OBJECTIVES: To determine if slowing delivery of inulin to the colon by administering it in divided doses would mimic the effect of PI. Primary endpoint was the BH2 area under the curve AUC0-24 h. Secondary endpoints included BH2 AUC0-6 h, 6-12 h, and 12-24 h. Exploratory endpoints included the correlation of BH2 AUC0-24 h with dietary fermentable oligo-, di-, monosaccharides, and polyols (FODMAPs) intake and in vitro fermentation results.<br><br>METHODS: A total of 17 healthy adults were randomly assigned to a single-blind, 3-arm, crossover trial. All consumed 20 g inulin (I) powder dissolved in 500 mL water and mixed with either 20 g maltodextrin (control) or 20 g PI consumed as a single dose or 20 g inulin given in divided doses (DDI), 62.5 mL every 45 min over 6 h. Twenty-four-hour BH2, dietary FODMAP intake, stool microbiota, and gas production in vitro were measured. Responders were defined as those whose AUC0-24 h BH2 was reduced by PI, whereas nonresponders showed no reduction.<br><br>RESULTS: Compared with control, PI did not reduce mean BH2 AUC0-24 h, whereas DDI increased it, P < 0.0002. DDI and PI both significantly reduced BH2 AUC0-6 h compared with the control, P < 0.0001. However, subsequently, DDI significantly increased BH2 from 6 to 12 h (P < 0.0001) and overnight (12-24 h) (P < 0.0001), whereas PI did so only overnight (P = 0.0002). Nonresponders showed greater release of arabinose during in vitro fermentation and higher abundance of 2 species, Clostridium spp. AM22_11AC and Phocaeicola dorei, which also correlated with BH2 production on PI. Dietary FODMAP intake tended to correlate inversely with BH2 AUC0-24 h (r = -0.42, P = 0.09) and correlated with microbiome community composition.<br><br>CONCLUSIONS: DDI, like PI, reduces early BH2 production. PI acts by delaying transit to the colon but not reducing colonic fermentation over 24 h. Dietary FODMAP intake correlates with BH2 response to inulin and the microbiome. This trial was registered at www.<br><br>CLINICALTRIALS: gov as NCT05619341.}, }
@article {pmid39731826, year = {2025}, author = {Zhou, G and Wang, YS and Wang, HJ and Sun, TL and Peng, RQ and Li, SJ and Peng, H and Wen, X and Zhu, XX and Zhu, YQ and Cui, ZB and Shi, QS and Xie, XB}, title = {Exploring the gut microbiota and metabolome of Lateolabrax japonicus: A multi-omics approach.}, journal = {Comparative biochemistry and physiology. Part D, Genomics &amp; proteomics}, volume = {54}, number = {}, pages = {101408}, doi = {10.1016/j.cbd.2024.101408}, pmid = {39731826}, issn = {1878-0407}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Metabolome ; *Metabolomics ; Metagenomics ; *Fishes/microbiology/metabolism ; Multiomics ; }, abstract = {The intestinal microbiota plays a crucial role in the health and development of fish, engaging in intricate interactions with the host organism. As a significant species in aquaculture, Lateolabrax japonicus serves as an exemplary model for investigating these interactions and their subsequent effects on growth and health. This study utilized a multi-omics approach, incorporating metagenomic sequencing and non-targeted metabolomics, to delineate the gut microbiota and metabolome of L. japonicus throughout various developmental phases. Collected from a meticulously controlled aquaculture setting, the intestinal microbiota of L. japonicus underwent high-throughput sequencing to scrutinize microbial DNA and enumerate metabolites. The metagenomic analysis uncovered a heterogeneous gut microbiota in L. japonicus, predominantly composed of Proteobacteria and Firmicutes, with marked heterogeneity in microbial composition across developmental stages. A particularly noteworthy discovery was the prevalence of the genus Acinetobacter, which may significantly influence health and disease resistance. The metabolomic profiling discerned 4479 metabolites, each exhibiting pronounced stage-specific metabolic signatures, particularly within lipid, amino acid, and energy metabolism pathways. The correlation analysis between microbiota and metabolites highlighted the substantial impact of specific genera, such as Acinetobacter and Gaeumannomyces, on the metabolic milieu. This study provides a comprehensive overview of the dynamic shifts in the gut microbiota and metabolome of L. japonicus, highlighting stage-specific transitions that could be pivotal for refining aquaculture practices. The findings underscore the complex interdependence between microbiota composition and metabolic function, providing valuable insights into the modulation of fish health and growth.}, }
@article {pmid39731160, year = {2024}, author = {Virtanen, S and Saqib, S and Kanerva, T and Ventin-Holmberg, R and Nieminen, P and Holster, T and Kalliala, I and Salonen, A}, title = {Metagenome-validated combined amplicon sequencing and text mining-based annotations for simultaneous profiling of bacteria and fungi: vaginal microbiota and mycobiota in healthy women.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {273}, pmid = {39731160}, issn = {2049-2618}, mesh = {Humans ; *Vagina/microbiology ; Female ; *RNA, Ribosomal, 16S/genetics ; *Fungi/genetics/classification/isolation &amp; purification ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota/genetics ; *Metagenome ; *Data Mining ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing/methods ; Sequence Analysis, DNA/methods ; Mycobiome ; Healthy Volunteers ; DNA, Bacterial/genetics ; }, abstract = {BACKGROUND: Amplicon sequencing of kingdom-specific tags such as 16S rRNA gene for bacteria and internal transcribed spacer (ITS) region for fungi are widely used for investigating microbial communities. So far most human studies have focused on bacteria while studies on host-associated fungi in health and disease have only recently started to accumulate. To enable cost-effective parallel analysis of bacterial and fungal communities in human and environmental samples, we developed a method where 16S rRNA gene and ITS1 amplicons were pooled together for a single Illumina MiSeq or HiSeq run and analysed after primer-based segregation. Taxonomic assignments were performed with Blast in combination with an iterative text-extraction-based filtration approach, which uses extensive literature records from public databases to select the most probable hits that were further validated by shotgun metagenomic sequencing.<br><br>RESULTS: Using 50 vaginal samples, we show that the combined run provides comparable results on bacterial composition and diversity to conventional 16S rRNA gene amplicon sequencing. The text-extraction-based taxonomic assignment-guided tool provided ecosystem-specific bacterial annotations that were confirmed by shotgun metagenomic sequencing (VIRGO, MetaPhlAn, Kraken2). Fungi were identified in 39/50 samples with ITS sequencing while in the metagenome data fungi largely remained undetected due to their low abundance and database issues. Co-abundance analysis of bacteria and fungi did not show strong between-kingdom correlations within the vaginal ecosystem of healthy women.<br><br>CONCLUSION: Combined amplicon sequencing for bacteria and fungi provides a simple and cost-effective method for simultaneous analysis of microbiota and mycobiota within the same samples. Conventional metagenomic sequencing does not provide sufficient fungal genome coverage for their reliable detection in vaginal samples. Text extraction-based annotation tool facilitates ecosystem-specific characterization and interpretation of microbial communities by coupling sequence homology to microbe metadata readily available through public databases. Video Abstract.}, }
@article {pmid39731152, year = {2024}, author = {Liang, L and Kong, C and Li, J and Liu, G and Wei, J and Wang, G and Wang, Q and Yang, Y and Shi, D and Li, X and Ma, Y}, title = {Distinct microbes, metabolites, and the host genome define the multi-omics profiles in right-sided and left-sided colon cancer.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {274}, pmid = {39731152}, issn = {2049-2618}, support = {No. 22PJD013//Shanghai Pujiang Program/ ; Nos. 81920108026 and 82372594//National Natural Science Foundation of China/ ; No.23410710500//Shanghai Science and Technology Development Foundation/ ; }, mesh = {Humans ; *Colonic Neoplasms/microbiology/genetics/metabolism ; *Gastrointestinal Microbiome/genetics ; Male ; *RNA, Ribosomal, 16S/genetics ; Female ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Middle Aged ; Metabolomics ; Metabolome ; Feces/microbiology ; Aged ; Exome Sequencing ; Metagenomics/methods ; Multiomics ; }, abstract = {BACKGROUND: Studies have reported clinical heterogeneity between right-sided colon cancer (RCC) and left-sided colon cancer (LCC). However, none of these studies used multi-omics analysis combining genetic regulation, microbiota, and metabolites to explain the site-specific difference.<br><br>METHODS: Here, 494 participants from a 16S rRNA gene sequencing cohort (50 RCC, 114 LCC, and 100 healthy controls) and a multi-omics cohort (63 RCC, 79 LCC, and 88 healthy controls) were analyzed. 16S rRNA gene, metagenomic sequencing, and metabolomics analyses of fecal samples were evaluated to identify tumor location-related bacteria and metabolites. Whole-exome sequencing (WES) and transcriptome sequencing (RNA-seq) were conducted to obtain the mutation burden and genomic expression pattern.<br><br>RESULTS: We found unique profiles of the intestinal microbiome, metabolome, and host genome between RCC and LCC. The bacteria Flavonifractor plautii (Fp) and Fusobacterium nucleatum, the metabolites L-phenylalanine, and the host genes PHLDA1 and WBP1 were the key omics features of RCC; whereas the bacteria Bacteroides sp. A1C1 (B.A1C1) and Parvimonas micra, the metabolites L-citrulline and D-ornithine, and the host genes TCF25 and HLA-DRB5 were considered the dominant omics features in LCC. Multi-omics correlation analysis indicated that RCC-enriched Fp was related to the accumulation of the metabolite L-phenylalanine and the suppressed WBP1 signal in RCC patients. In addition, LCC-enriched B.A1C1 was associated with the accumulation of the metabolites D-ornithine and L-citrulline as well as activation of the genes TCF25, HLA-DRB5, and AC079354.1.<br><br>CONCLUSION: Our findings identify previously unknown links between intestinal microbiota alterations, metabolites, and host genomics in RCC vs. LCC, suggesting that it may be possible to treat colorectal cancer (CRC) by targeting the gut microbiota-host interaction. Video Abstract.}, }
@article {pmid39730187, year = {2025}, author = {Yan, M and Andersen, TO and Pope, PB and Yu, Z}, title = {Probing the eukaryotic microbes of ruminants with a deep-learning classifier and comprehensive protein databases.}, journal = {Genome research}, volume = {35}, number = {2}, pages = {368-378}, pmid = {39730187}, issn = {1549-5469}, mesh = {Animals ; *Ruminants/microbiology/parasitology/genetics ; *Metagenomics/methods ; Metagenome ; *Deep Learning ; *Databases, Protein ; Rumen/microbiology ; Fungi/genetics/classification ; Computational Biology/methods ; *Eukaryota/genetics/classification ; *Gastrointestinal Microbiome/genetics ; }, abstract = {Metagenomics, particularly genome-resolved metagenomics, have significantly deepened our understanding of microbes, illuminating their taxonomic and functional diversity and roles in ecology, physiology, and evolution. However, eukaryotic populations within various microbiomes, including those in the mammalian gastrointestinal (GI) tract, remain relatively underexplored in metagenomic studies owing to the lack of comprehensive reference genome databases and robust bioinformatic tools. The GI tract of ruminants, particularly the rumen, contains a high eukaryotic biomass but a relatively low diversity of ciliates and fungi, which significantly impacts feed digestion, methane emissions, and rumen microbial ecology. In the present study, we developed GutEuk, a bioinformatics tool that improves upon the currently available Tiara and EukRep in accurately identifying eukaryotic sequences from metagenomes. GutEuk is optimized for high precision across different sequence lengths. It can also distinguish fungal and protozoal sequences, further elucidating their unique ecological, physiological, and nutritional impacts. GutEuk was shown to facilitate comprehensive analyses of protozoa and fungi within more than 1000 rumen metagenomes, revealing a greater genomic diversity among protozoa than previously documented. We further curated several ruminant eukaryotic protein databases, significantly enhancing our ability to distinguish the functional roles of ruminant fungi and protozoa from those of prokaryotes. Overall, the newly developed package GutEuk and its associated databases create new opportunities for the in-depth study of GI tract eukaryotes.}, }
@article {pmid39729842, year = {2025}, author = {Wang, M and Zhao, J and Gu, Y and Wu, Y and Liu, Y and Tang, Z and Xu, Y and Mao, X and Zhang, J and Tian, W}, title = {Deciphering the mechanism of rhizosphere microecosystem in modulating rice cadmium accumulation via integrating metabolomics and metagenomics.}, journal = {The Science of the total environment}, volume = {959}, number = {}, pages = {178181}, doi = {10.1016/j.scitotenv.2024.178181}, pmid = {39729842}, issn = {1879-1026}, mesh = {*Oryza/metabolism ; *Cadmium/metabolism/analysis ; *Rhizosphere ; *Soil Pollutants/metabolism/analysis ; Metabolomics ; *Soil Microbiology ; Metagenomics ; Microbiota ; }, abstract = {Cadmium (Cd) accumulation in rice poses significant risks to human health. The Cd accumulation levels vary widely among cultivars and are strongly associated with the rhizosphere microecosystem. However, the underlying mechanisms remain poorly understood. Here, we conducted a field experiment in Cd-contaminated areas with 24 popular regional cultivars. These cultivars were categorized into high Cd accumulation (HA) and low Cd accumulation (LA) groups based on their grain Cd content. Rhizosphere soil physicochemical properties were monitored, and key metabolites, microbiomes, and their interaction contributing to Cd accumulation were analyzed using omics-sequencing technologies and bioinformatics analysis. Metabolomic analysis identified distinct rhizosphere metabolite profiles between the HA and LA groups, with key metabolites showing strong correlations with Cd accumulation. Key metabolites in the LA group were linked to reduced Cd uptake and enhanced antioxidant defense mechanisms, while those in the HA group were associated with increased Cd mobility and uptake. Metagenomic analysis of the rhizosphere soil showed that the LA group harbored a more diverse and interconnected microbial community, with tax such as Syntrophaceae, Anaerolineae, Thermoflexales, and Syntrophales, along with metabolite such as disopyramide, playing central roles in Cd immobilization and detoxification. Additionally, the enhanced carbon, nitrogen, and phosphorus cycling in the LA group suggests a more robust nutrient assimilation process that supports plant growth and reduces Cd uptake. This study highlights the critical role of the rhizosphere microecosystem in regulating Cd accumulation and underscores the potential of selecting rice cultivars with favorable rhizosphere traits as a strategy for reducing Cd uptake.}, }
@article {pmid39726137, year = {2025}, author = {Schwesig, K and Zizka, V and Scherber, C and Hölzel, N}, title = {Comparing eDNA and Transect Methods for Aquatic Biodiversity Assessment in Lakes and Ponds.}, journal = {Molecular ecology resources}, volume = {25}, number = {3}, pages = {e14060}, pmid = {39726137}, issn = {1755-0998}, support = {01UT2101C//Bundesministerium f&#xfc;r Bildung und Forschung/ ; 01UT2101B//Bundesministerium f&#xfc;r Bildung und Forschung/ ; }, mesh = {Animals ; *Biodiversity ; *Ponds ; *Amphibians/classification/genetics ; *DNA Barcoding, Taxonomic/methods ; *Lakes ; Germany ; *Odonata/classification/genetics ; *Metagenomics/methods ; *DNA, Environmental/genetics ; }, abstract = {Biodiversity monitoring increasingly relies on molecular methods such as eDNA metabarcoding. However, sound applications have so far been only established for a limited number of taxonomic groups. More information on the strengths and weaknesses of eDNA methods, especially for poorly covered groups, is essential for practical applications to achieve the highest possible reliability. We compared amphibian and Odonata data from eDNA metabarcoding and traditional transect walks on N = 56 plots in 38 water bodies distributed over six extraction sites for building materials in Northwest Germany. The traditional amphibian assessment included visual encounters, dip netting and acoustic detection, while Odonata were assessed through exuviae. In total, both methods detected 8 out of 11 amphibian species, while the remaining three species were detected by eDNA only. We did not find differences in amphibian species numbers per plot, but mean detection probabilities were higher with metabarcoding. In contrast, both methods detected 10 out of 29 Odonata species, while the remaining 19 species were detected by exuviae only. Species numbers per plot were higher for exuviae and only 30% of species were detected with metabarcoding. The species identified by eDNA were those with high abundance, and their detection probabilities were similar to transect walks. The results for amphibians show equal suitability and high complementarity of the compared methods. Metabarcoding detected species more efficiently and therefore offers a suitable protocol for biodiversity monitoring. For Odonata, eDNA metabarcoding showed considerable gaps, implying the need for protocol evaluation and improvement in assessment of ecological communities based on eDNA.}, }
@article {pmid39724786, year = {2025}, author = {Ma, X and Zhang, J and Jiang, Q and Li, YX and Yang, G}, title = {Human microbiome-derived peptide affects the development of experimental autoimmune encephalomyelitis via molecular mimicry.}, journal = {EBioMedicine}, volume = {111}, number = {}, pages = {105516}, pmid = {39724786}, issn = {2352-3964}, mesh = {*Encephalomyelitis, Autoimmune, Experimental/immunology/etiology/metabolism/pathology ; Humans ; Animals ; *Molecular Mimicry ; Mice ; Myelin-Oligodendrocyte Glycoprotein/immunology/chemistry ; *Gastrointestinal Microbiome ; *Peptides/chemistry/immunology ; *Peptide Fragments/immunology/chemistry ; Disease Models, Animal ; Receptors, Antigen, T-Cell/metabolism ; Computational Biology/methods ; Histocompatibility Antigens Class II/metabolism ; Protein Binding ; *Microbiota ; CD4-Positive T-Lymphocytes/immunology/metabolism ; Multiple Sclerosis ; Dendritic Cells/immunology/metabolism ; Female ; }, abstract = {BACKGROUND: Gut commensal microbiota has been identified as a potential environmental risk factor for multiple sclerosis (MS), and numerous studies have linked the commensal microorganism with the onset of MS. However, little is known about the mechanisms underlying the gut microbiome and host-immune system interaction.<br><br>METHODS: We employed bioinformatics methodologies to identify human microbial-derived peptides by analyzing their similarity to the MHC II-TCR binding patterns of self-antigens. Subsequently, we conducted a range of in&#xa0;vitro and in&#xa0;vivo assays to assess the encephalitogenic potential of these microbial-derived peptides.<br><br>FINDINGS: We analyzed 304,246 human microbiome genomes and 103 metagenomes collected from the MS cohort and identified 731 nonredundant analogs of myelin oligodendrocyte glycoprotein peptide 35-55 (MOG35-55). Of note, half of these analogs could bind to MHC II and interact with TCR through structural modeling of the interaction using fine-tuned AlphaFold. Among the 8 selected peptides, the peptide (P3) shows the ability to activate MOG35-55-specific CD4[+] T cells in&#xa0;vitro. Furthermore, P3 shows encephalitogenic capacity and has the potential to induce EAE in some animals. Notably, mice immunized with a combination of P3 and MOG35-55 develop severe EAE. Additionally, dendritic cells could process and present P3 to MOG35-55-specific CD4[+] T cells and activate these cells.<br><br>INTERPRETATION: Our data suggests the potential involvement of a MOG35-55-mimic peptide derived from the gut microbiota as a molecular trigger of EAE pathogenesis. Our findings offer direct evidence of how microbes can initiate the development of EAE, suggesting a potential explanation for the correlation between certain gut microorganisms and MS prevalence.<br><br>FUNDING: National Natural Science Foundation of China (82371350 to GY).}, }
@article {pmid39724227, year = {2024}, author = {Shahid, U and Hooi, SL and Lim, SY and Mohd Aris, A and Khor, BC and Ayub, Q and Tan, HS}, title = {Metagenomic surveillance of microbial community and antibiotic resistant genes associated with Malaysian wastewater during the COVID-19 pandemic.}, journal = {Current genetics}, volume = {71}, number = {1}, pages = {1}, pmid = {39724227}, issn = {1432-0983}, mesh = {*Wastewater/microbiology ; *COVID-19/epidemiology ; Malaysia/epidemiology ; *Metagenomics/methods ; *SARS-CoV-2/genetics ; Humans ; Drug Resistance, Microbial/genetics ; Pandemics ; Microbiota/genetics ; Metagenome ; Bacteria/genetics/classification/drug effects ; Anti-Bacterial Agents/pharmacology ; Drug Resistance, Bacterial/genetics ; Gene Transfer, Horizontal ; }, abstract = {Wastewater is a reservoir of pathogens and hotspots for disseminating antibiotic resistance genes across species. The metagenomic surveillance of wastewater provides insight into the native microbial community, antibiotic-resistance genes (ARGs) and mobile genetic elements. t. The COVID-19 pandemic has caused wider dissemination of ARGs and resistant bacteria in wastewater. Although immensely significant, no research has been performed on the Malaysian wastewater microbial community and ARGs or their correlation with COVID-19 infections. This study utilised a 16S metagenomics approach to characterise the microbial community in Malaysian wastewater during high and low-case phases of the pandemic. Bacteria belonging to Bacteriodales, Bacillales, Actinomycetales and opportunistic pathogens-Arcobacters, Flavobacteria, and Campylobacterales, Neisseriales, were enriched during higher COVID-19 pandemic (active cases). Additionally, copy number profiling of ARGs in water samples showed the prevalence of elements conferring resistance to antibiotics like sulphonamides, cephalosporins, and colistin. The high prevalence of intI1 and other ion-based transporters in samples highlights an extensive risk of horizontal gene transfer to previously susceptible species. Our study emphasises the importance of wastewater surveillance in understanding microbial community dynamics and ARG dissemination, particularly during public health crises like the COVID-19 pandemic.}, }
@article {pmid39724159, year = {2024}, author = {Ulbrich, J and Jobe, NE and Jones, DS and Kieft, TL}, title = {Cave Pools in Carlsbad Caverns National Park Contain Diverse Bacteriophage Communities and Novel Viral Sequences.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {163}, pmid = {39724159}, issn = {1432-184X}, support = {NCKRI-NMT Internal Seed Grant Program//National Cave and Karst Research Institute/ ; }, mesh = {*Caves ; *Parks, Recreational ; *Bacteriophages/genetics/isolation &amp; purification/classification ; *Bacteria/genetics/classification/isolation &amp; purification/virology ; *RNA, Ribosomal, 16S/genetics ; California ; Metagenome ; Phylogeny ; Virome ; Biodiversity ; }, abstract = {Viruses are the most abundant biological entities on Earth, and they play a critical role in the environment and biosphere where they regulate microbial populations and contribute to nutrient cycling. Environmental viruses have been the most studied in the ocean, but viral investigations have now spread to other environments. Here, viral communities were characterized in four cave pools in Carlsbad Caverns National Park to test the hypotheses that (i) viral abundance is ten-fold higher than prokaryotic cell abundance in cavern pools, (ii) cavern pools contain novel viral sequences, and (iii) viral communities in pools from developed portions of the cave are distinct from those of pools in undeveloped parts of the same cave. The relationship between viral and microbial abundance was determined through direct epifluorescence microscopy counts. Viral metagenomes were constructed to examine viral diversity among pools, identify novel viruses, and characterize auxiliary metabolic genes (AMGs). Bacterial communities were characterized by 16S rRNA gene amplicon sequencing. Epifluorescence microscopy showed that the ratio of viral-like particles (VLPs) to microorganisms was approximately 22:1 across all sites. Viral communities from pools with higher tourist traffic were more similar to each other than to those from less visited pools, although surprisingly, viruses did not follow the same pattern as bacterial communities, which reflected pool geochemistry. Bacterial hosts predicted from viral sequences using iPHoP showed overlap with both rare and abundant genera and families in the 16S rRNA gene dataset. Gene-sharing network analysis revealed high viral diversity compared to a reference viral database as well as to other aquatic environments. AMG presence showed variation in metabolic potential among the four pools. Overall, Carlsbad Cavern harbors novel viruses with substantial diversity among pools within the same system, indicating that caves are likely an important repository for unexplored viromes.}, }
@article {pmid39723822, year = {2025}, author = {Beauchemin, ET and Hunter, C and Maurice, CF}, title = {Dextran sodium sulfate-induced colitis alters the proportion and composition of replicating gut bacteria.}, journal = {mSphere}, volume = {10}, number = {1}, pages = {e0082524}, pmid = {39723822}, issn = {2379-5042}, support = {Frederick Banting and Charles Best Canada Graduate Scholarship-Master's//Canadian Government | Canadian Institutes of Health Research (CIHR)/ ; Ferrings Pharmaceuticals Fellowship//Faculty of Medicine, McGill University (McGill Faculty of Medicine)/ ; Doctoral Research grant//FRQ | Fonds de recherche du Qu&#xe9;bec - Nature et technologies (FRQNT)/ ; 950-230748 X-242502//Canada Research Chairs (Chaires de recherche du Canada)/ ; PJT-149098//Canadian Government | Canadian Institutes of Health Research (CIHR)/ ; Innovators award//Kenneth Rainin Foundation (KRF)/ ; Owens Catchpaugh IBD Graduate Research Award//McGill University Health Centre (MUHC)/ ; }, mesh = {*Dextran Sulfate/pharmacology ; *Colitis/chemically induced/microbiology ; *Gastrointestinal Microbiome/drug effects ; Biodiversity ; Male ; Female ; Animals ; Mice ; Feces/microbiology ; }, abstract = {The bacteria living in the human gut are essential for host health. Though the composition and metabolism of these bacteria are well described in both healthy hosts and those with intestinal disease, less is known about the metabolic activity of the gut bacteria prior to, and during, disease development-especially regarding gut bacterial replication. Here, we use a recently developed single-cell technique alongside existing metagenomics-based tools to identify, track, and quantify replicating gut bacteria both ex vivo and in situ in the dextran sodium sulfate (DSS) mouse model of colitis. We show that the proportion of replicating gut bacteria decreases when mice have the highest levels of inflammation and returns to baseline levels as mice begin recovering. In addition, we report significant alterations in the composition of the replicating gut bacterial community ex vivo during colitis development. On the taxa level, we observe significant changes in the abundance of taxa such as the mucus-degrading Akkermansia and the poorly described Erysipelatoclostridium genus. We further demonstrate that many taxa exhibit variable replication rates in situ during colitis, including Akkermansia muciniphila. Lastly, we show that colitis development is positively correlated with increases in the presence and abundance of bacteria in situ which are predicted to be fast replicators. This could suggest that taxa with the potential to replicate quickly may have an advantage during intestinal inflammation. These data support the need for additional research using activity-based approaches to further characterize the gut bacterial response to intestinal inflammation and its consequences for both the host and the gut microbial community.IMPORTANCEIt is well known that the bacteria living inside the gut are important for human health. Indeed, the type of bacteria that are present and their metabolism are different in healthy people versus those with intestinal disease. However, less is known about how these gut bacteria are replicating, especially as someone begins to develop intestinal disease. This is particularly important as it is thought that metabolically active gut bacteria may be more relevant to health. Here, we begin to address this gap using several complementary approaches to characterize the replicating gut bacteria in a mouse model of intestinal inflammation. We reveal which gut bacteria are replicating, and how quickly, as mice develop and recover from inflammation. This work can serve as a model for future research to identify how actively growing gut bacteria may be impacting health, or why these particular bacteria tend to thrive during intestinal inflammation.}, }
@article {pmid39722590, year = {2025}, author = {Wu, WK and Lo, YL and Chiu, JY and Hsu, CL and Lo, IH and Panyod, S and Liao, YC and Chiu, THT and Yang, YT and Kuo, HC and Zou, HB and Chen, YH and Chuang, HL and Yen, JJY and Wang, JT and Chiu, HM and Hsu, CC and Kuo, CH and Sheen, LY and Kao, HL and Wu, MS}, title = {Gut microbes with the gbu genes determine TMAO production from L-carnitine intake and serve as a biomarker for precision nutrition.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2446374}, pmid = {39722590}, issn = {1949-0984}, mesh = {*Methylamines/metabolism ; *Gastrointestinal Microbiome ; *Carnitine/metabolism ; Humans ; *Biomarkers/analysis ; Male ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Feces/microbiology ; Female ; Animals ; Adult ; Mice ; Multigene Family ; Middle Aged ; Metagenomics ; Precision Medicine ; }, abstract = {Gut microbial metabolism of L-carnitine, which leads to the production of detrimental trimethylamine N-oxide (TMAO), offers a plausible link between red meat consumption and cardiovascular risks. Several microbial genes, including cntA/B, the cai operon, and the recently identified gbu gene cluster, have been implicated in the conversion of dietary L-carnitine into TMA(O). However, the key microbial genes and associated gut microbes involved in this pathway have not been fully explored. Utilizing the oral carnitine challenge test (OCCT), which specifically measures TMAO production from L-carnitine intake and identifies TMAO producer phenotypes, we compared the abundance of microbial genes between low- and high-TMAO producers across three independent cohorts. Our findings consistently revealed that the gbu gene cluster, rather than cntA/B or the cai operon, was significantly enriched in high-TMAO producers. We further analyzed 292 paired multi-omic datasets from OCCT and shotgun metagenomic sequencing, which demonstrated a significant positive correlation between the abundance of fecal gbu genes and L-carnitine-induced TMAO production, with gbuB showing the strongest correlation. Interestingly, these fecal gbu genes were found to increase with L-carnitine supplementation and decrease with a plant-based diet. Notably, we verified a previously uncultured gbu-containing bacterium, JAGTTR01 sp018223385, as the major contributor to TMA formation in the human gut. We isolated these gbu-containing gut microbes and confirmed their role in TMA/TMAO production using anaerobic incubation and a gnotobiotic mouse model. Using an in-house collection of gbu-containing isolates, we developed a qPCR-based method to quantify fecal gbuB and validated its correlation with L-carnitine-mediated TMAO production as measured by OCCT. Overall, these findings suggest that gbu-containing gut microbes are crucial for TMAO increases following L-carnitine intake and may serve as biomarkers or targets for personalized nutrition.}, }
@article {pmid39722539, year = {2025}, author = {Zepeda-Rivera, MA and Eisele, Y and Baryiames, A and Wu, H and Mengoni, C and Piccinno, G and McMahon, EF and LaCourse, KD and Jones, DS and Hauner, H and Minot, SS and Segata, N and Dewhirst, FE and Johnston, CD and Bullman, S}, title = {Fusobacterium sphaericum sp. nov., isolated from a human colon tumor adheres to colonic epithelial cells and induces IL-8 secretion.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2442522}, doi = {10.1080/19490976.2024.2442522}, pmid = {39722539}, issn = {1949-0984}, mesh = {Humans ; *Interleukin-8/metabolism/genetics ; *Colonic Neoplasms/microbiology/pathology ; *Fusobacterium/isolation &amp; purification/genetics ; *Epithelial Cells/microbiology ; *Phylogeny ; Bacterial Adhesion ; Colon/microbiology/pathology ; Feces/microbiology ; Adenocarcinoma/microbiology/pathology ; Gastrointestinal Microbiome ; RNA, Ribosomal, 16S/genetics ; Genome, Bacterial ; }, abstract = {Cancerous tissue is a largely unexplored microbial niche that provides a unique environment for the colonization and growth of specific bacterial communities, and with it, the opportunity to identify novel bacterial species. Here, we report distinct features of a novel Fusobacterium species, F. sphaericum sp. nov. (Fs), isolated from primary colon adenocarcinoma tissue. We acquire the complete closed genome and associated methylome of this organism and phylogenetically confirm its classification into the Fusobacterium genus, with F. perfoetens as its closest neighbor. Fs is phenotypically and genetically distinct, with morphological analysis revealing its coccoid shape, that while similar to F. perfoetens is rare for most Fusobacterium members. Fs displays a metabolic profile and antibiotic resistance repertoire consistent with other Fusobacterium species. In vitro, Fs has adherent and immunomodulatory capabilities, as it intimately associates with human colon cancer epithelial cells and promotes IL-8 secretion. An analysis of the prevalence and abundance of Fs in > 20,000 human metagenomic samples shows that it is a rarely detected member within human stool with variable relative abundance, found in both healthy controls and patients with colorectal cancer (CRC). Our study sheds light on a novel bacterial species isolated directly from the human CRC tumor niche and given its in vitro interaction with cancer epithelial cells suggests that its role in human health and disease warrants further investigation.}, }
@article {pmid39722326, year = {2025}, author = {Liu, X and Chen, Y and Liu, Y and Hu, Y and Wang, K and Huang, L and Ke, X and Peng, L and Guo, Z}, title = {Protective effects and mechanisms of extracts of Gleditsia sinensis Lam. Thorn on DSS-induced colitis in mice.}, journal = {Journal of ethnopharmacology}, volume = {340}, number = {}, pages = {119244}, doi = {10.1016/j.jep.2024.119244}, pmid = {39722326}, issn = {1872-7573}, mesh = {Animals ; Dextran Sulfate ; Mice ; *Plant Extracts/pharmacology/therapeutic use ; Gastrointestinal Microbiome/drug effects ; Male ; *Colitis/chemically induced/drug therapy/pathology/prevention &amp; control ; Cytokines/blood/metabolism ; Disease Models, Animal ; Mice, Inbred C57BL ; Colon/drug effects/pathology/metabolism ; *Colitis, Ulcerative/chemically induced/drug therapy ; *Anti-Inflammatory Agents/pharmacology/isolation &amp; purification ; Metabolomics ; }, abstract = {Inflammatory Bowel Disease (IBD), encompassing Ulcerative Colitis (UC) and Crohn's Disease (CD), stems from a multifaceted interaction of hereditary, immunological, ecological, and microbial elements. Current treatments have limitations, necessitating new therapeutic approaches.<br><br>AIM OF THE STUDY: This study investigates the safeguarding impacts and fundamental processes of extracts of Gleditsia sinensis Lam. thorn (EGST) in a dextran sulfate sodium (DSS)-induced colitis model in mice.<br><br>MATERIALS AND METHODS: A total of 180g of dried EGST were prepared, and untargeted metabolomic profiling using high-resolution liquid chromatography electrospray ionization orbitrap mass spectrometry (HR-LC-ESI-Orbitrap-MS) identified 930 compounds. UC model mice were administered 3% DSS for 7&#xa0;d, followed by EGST treatment. The analysis encompassed physiological and pathological evaluations, serum cytokine ELISA, gut microbiota (GM) metagenomic sequencing, GC-MS metabolomics, mRNA sequencing, and Western Blot.<br><br>RESULTS: EGST markedly mitigated colitis symptoms, evidenced by reduced weight loss, lower DAI scores, and less colon shortening. It also decreased levels of pro-inflammatory cytokines (TNF-&#x3b1;, IL-6, IL-1&#x3b2;) while boosting IL-10. Histological examination revealed diminished tissue damage, restoration of crypts, and reduced inflammation, with barrier integrity maintained via upregulation of occludin and ZO-1. Metagenomic sequencing demonstrated that EGST modulated the GM, enhancing the levels of Firmicutes and Bacteroidetes while reducing the levels of Proteobacteria and Verrucomicrobia. Metabolomic analysis indicated that EGST influenced critical pathways, including those involving D-amino acids, glutathione, cysteine, and methionine metabolism. Furthermore, mRNA sequencing identified 2625 differentially expressed genes (DEGs), comprising 1729 with increased and 896 with decreased expression, and highlighted EGST's impact on the PPAR&#x3b3;/AMPK/NF-&#x3ba;B pathway.<br><br>CONCLUSION: Overall, EGST mitigates DSS-induced colitis through modulation of GM, metabolic profiles, and gene expression, suggesting its promise as a naturally derived treatment for colitis.}, }
@article {pmid39721532, year = {2025}, author = {Chauhan, A and Jain, A and Kolton, M and Pathak, A}, title = {Impacts of long-term irrigation of municipally-treated wastewater to the soil microbial and nutrient properties.}, journal = {The Science of the total environment}, volume = {959}, number = {}, pages = {178143}, doi = {10.1016/j.scitotenv.2024.178143}, pmid = {39721532}, issn = {1879-1026}, mesh = {*Agricultural Irrigation/methods ; *Soil Microbiology ; *Wastewater/microbiology ; *Waste Disposal, Fluid/methods ; *Microbiota ; Soil/chemistry ; Environmental Monitoring ; Fungi ; Nutrients/analysis ; }, abstract = {Reusing treated wastewater (TWW) for crop irrigation has shown to provide environmental and economic benefits as well as drawbacks. This study was conducted using soils collected from a wastewater reuse facility in Tallahassee, FL, mainly to elucidate the long-term impact(s) of TWW irrigation on soil microbiome and nutrient status. Approximately 890 ha of land have been spray-irrigated with TWW since the 1980's to grow fodder crops. Soil cores were collected from six irrigated and six control sites at depths of 0-15, 15-30, and 30-60 cm during summer and winter, followed by nutrient analysis and assessment of bacterial, fungal, and denitrifier communities using SSU rRNA, ITS, nirK, nirS, and nosZ phylogenetic markers. TWW irrigation significantly increased soil pH, soluble salts, nitrate, phosphate, calcium, magnesium, and organic matter, alongside shifts in the prokaryotic and fungal community structures, particularly in summer. Beta-diversity analyses indicated that wastewater quality and season collectively explained 23 % of prokaryotic community similarity and 9.8 % of fungal community dissimilarity. Indicator species analysis, supported by random forest machine learning, identified 37 prokaryotic and 11 fungal bioindicators whose occurrences varied significantly with wastewater quality and season. Key nitrogen-cycling microbes included ammonia-oxidizing families of Nitrosomonadaceae, Nitrosopumilaceae, Nitrososphaeraceae, Nitrosotaleaceae, and comammox-performing Nitrospiraceae. The fungal community was predominated by Ascomycota (78.6 % ± 4.2 %). FUNGuild analysis showed dominant trophic levels of symbiotrophs, saprotrophs, and pathotrophs, averaging 42 % ± 7.1 %. Overall, this study points to the long-term impacts of TWW irrigation on the studied soil properties and microbial communities.}, }
@article {pmid39720963, year = {2024}, author = {Guha, SK and Niyogi, S}, title = {Microbial Dynamics in COVID-19: Unraveling the Impact of Human Microbiome on Disease Susceptibility and Therapeutic Strategies.}, journal = {Current microbiology}, volume = {82}, number = {1}, pages = {59}, pmid = {39720963}, issn = {1432-0991}, mesh = {Humans ; *COVID-19/microbiology/virology ; *SARS-CoV-2 ; *Microbiota ; *Dysbiosis/microbiology ; Disease Susceptibility ; Probiotics/therapeutic use ; Gastrointestinal Microbiome ; }, abstract = {This review explores the bidirectional relationship between the human microbiome and SARS-CoV-2 infection, elucidating its implications for COVID-19 susceptibility, severity, and therapeutic strategies. Metagenomic analyses reveal notable alterations in microbiome composition associated with SARS-CoV-2 infection, impacting disease severity and clinical outcomes. Dysbiosis within the respiratory, gastrointestinal, oral, and skin microbiomes exacerbates COVID-19 pathology through immune dysregulation and inflammatory pathways. Understanding these microbial shifts is pivotal for devising targeted therapeutic interventions. Notably, co-infection of oral pathogens with SARS-CoV-2 worsens lung pathology, while gut microbiome dysbiosis influences viral susceptibility and severity. Potential therapeutic approaches targeting the microbiome include probiotics, antimicrobial agents, and immunomodulatory strategies. This review underscores the importance of elucidating host-microbiota interactions to advance precision medicine and public health initiatives in combating COVID-19 and other infectious diseases.}, }
@article {pmid39719725, year = {2025}, author = {Deng, K and Shen, L and Xue, Z and Li, BY and Tang, J and Zhao, H and Xu, F and Miao, Z and Cai, X and Hu, W and Fu, Y and Jiang, Z and Liang, X and Xiao, C and Shuai, M and Gou, W and Yue, L and Xie, Y and Sun, TY and Guo, T and Chen, YM and Zheng, JS}, title = {Association of the EAT-Lancet diet, serial measures of serum proteome and gut microbiome, and cardiometabolic health: a prospective study of Chinese middle-aged and elderly adults.}, journal = {The American journal of clinical nutrition}, volume = {121}, number = {3}, pages = {567-579}, doi = {10.1016/j.ajcnut.2024.10.011}, pmid = {39719725}, issn = {1938-3207}, mesh = {Aged ; Female ; Humans ; Male ; Middle Aged ; *Blood Proteins/metabolism/analysis ; Cardiometabolic Risk Factors ; *Cardiovascular Diseases/blood ; China ; *Diet ; *Gastrointestinal Microbiome/physiology ; Prospective Studies ; *Proteome/metabolism ; East Asian People/statistics &amp; numerical data ; }, abstract = {BACKGROUND: The EAT-Lancet diet was reported to be mutually beneficial for the human cardiometabolic system and planetary health. However, mechanistic evidence linking the EAT-Lancet diet and human cardiometabolic health is lacking.<br><br>OBJECTIVES: We aimed to investigate the role of blood proteins in the association between the EAT-Lancet diet and cardiometabolic health and explore the underlying gut microbiota-blood protein interplay.<br><br>METHODS: Our study was based on a prospective cohort including 3742 Chinese participants enrolled from 2008-2013 with serum proteome data repeatedly measured &#x2264;3 times (Nproteome = 7514) and 1195 with gut metagenomic data measured &#x2264;2 times over 9 y (Nmicrobiota = 1695). Least absolute shrinkage and selection operator and multivariable linear regression were used to explore the associations of the EAT-Lancet diet (assessed by semi-quantitative food frequency questionnaire) with serum proteins and gut microbes. Linear mixed-effect model and logistic regression were used to examine the associations of selected proteins with 11 cardiometabolic risk factors and 4 cardiometabolic diseases, respectively. Mediation analysis was used to identify potential mediation effects. Multiple comparisons were adjusted using the Benjamini-Hochberg method.<br><br>RESULTS: The mean (standard deviation) age of enrolled participants was 58.4 (6.1) y (31.6% men). The EAT-Lancet diet was prospectively associated with 4 core proteins, including &#x3b1;-2-macroglobulin (A2M) (pooled &#x3b2;: 0.12; 95% confidence interval [CI]: 0.05, 0.2), retinol-binding protein 4 (pooled &#x3b2;: -0.14; 95% CI: -0.24, -0.04), TBC1 domain family member 31 (pooled &#x3b2;: -0.11; 95% CI: -0.22, 0), and adenylate kinase 4 (pooled &#x3b2;: -0.19; 95% CI: -0.3, -0.08). The identified proteins were prospectively associated with cardiometabolic diseases (pooled odds ratio ranged from 0.8-1.18) and risk factors (pooled &#x3b2; ranged from -0.1 to 0.12), mediating the association between the EAT-Lancet diet and blood triglycerides. We then identified 5 gut microbial biomarkers of the EAT-Lancet diet, and discovered a potential gut microbiota-blood protein interplay (EAT-Lancet diet&#x2192;Rothia mucilaginosa&#x2192;A2M) underlying the EAT-Lancet diet-cardiometabolic health association.<br><br>CONCLUSIONS: Our study presents key molecular evidence to support the role of EAT-Lancet diet adherence in promoting cardiometabolic health.}, }
@article {pmid39719706, year = {2025}, author = {Zhang, AN and Gaston, JM and Cárdenas, P and Zhao, S and Gu, X and Alm, EJ}, title = {CRISPR-Cas spacer acquisition is a rare event in human gut microbiome.}, journal = {Cell genomics}, volume = {5}, number = {1}, pages = {100725}, pmid = {39719706}, issn = {2666-979X}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *CRISPR-Cas Systems/genetics ; Gene Transfer, Horizontal/genetics ; Bacteriophages/genetics ; Bifidobacterium longum/genetics ; Metagenome/genetics ; Clustered Regularly Interspaced Short Palindromic Repeats/genetics ; Genome, Bacterial/genetics ; }, abstract = {Host-parasite relationships drive the evolution of both parties. In microbe-phage dynamics, CRISPR functions as an adaptive defense mechanism, updating immunity via spacer acquisition. Here, we investigated these interactions within the human gut microbiome, uncovering low frequencies of spacer acquisition at an average rate of one spacer every ∼2.9 point mutations using isolates' whole genomes and ∼2.7 years using metagenome time series. We identified a highly prevalent CRISPR array in Bifidobacterium longum spreading via horizontal gene transfer (HGT), with six spacers found in various genomic regions in 15 persons from the United States and Europe. These spacers, targeting two prominent Bifidobacterium phages, comprised 76% of spacer occurrence of all spacers targeting these phages in all B. longum populations. This result suggests that HGT of an entire CRISPR-Cas system introduced three times more spacers than local CRISPR-Cas acquisition in B. longum. Overall, our findings identified key ecological and evolutionary factors in prokaryote adaptive immunity.}, }
@article {pmid39719433, year = {2024}, author = {Jia, M and Fan, Y and Ma, Q and Yang, D and Wang, Y and He, X and Zhao, B and Zhan, X and Qi, Z and Ren, Y and Dong, Z and Zhu, F and Wang, W and Gao, Y and Ma, X}, title = {Gut microbiota dysbiosis promotes cognitive impairment via bile acid metabolism in major depressive disorder.}, journal = {Translational psychiatry}, volume = {14}, number = {1}, pages = {503}, pmid = {39719433}, issn = {2158-3188}, support = {82230044//National Science Foundation of China | Key Programme/ ; 82171505//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Depressive Disorder, Major/metabolism/microbiology ; *Bile Acids and Salts/metabolism ; Male ; Female ; *Dysbiosis/metabolism/complications ; *Cognitive Dysfunction/metabolism/etiology/microbiology ; Adult ; Middle Aged ; Feces/microbiology ; Metabolomics ; Case-Control Studies ; Brain-Gut Axis ; }, abstract = {Evidence suggests that complex interactions among the gut microbiome, metabolic abnormalities, and brain have important etiological and therapeutic implications in major depressive disorder (MDD). However, the influence of microbiome-gut-brain cross-talk on cognitive impairment in MDD remains poorly characterized. We performed serum metabolomic profiling on 104 patients with MDD and 77 healthy controls (HCs), and also performed fecal metagenomic sequencing on a subset of these individuals, including 79 MDD patients and 60 HCs. The findings were validated in a separate cohort that included 40 patients with MDD and 40 HCs using serum-targeted metabolomics. Abnormal bile acid metabolism was observed in patients with MDD, which is related to cognitive dysfunction. The following gut microbiota corresponded to changes in bile acid metabolism and enzyme activities involved in the bile acid metabolic pathway, including Lachnospiraceae (Blautia_massiliensis, Anaerostipes_hadrus, Dorea_formicigenerans, and Fusicatenibacter_saccharivorans), Ruminococcaceae (Ruminococcus_bromii, Flavonifractor_plautii, and Ruthenibacterium_lactatiformans), and Escherichia_coli. Furthermore, a combinatorial marker classifier that robustly differentiated patients with MDD from HCs was identified. In conclusion, this study provides insights into the gut-brain interactions in the cognitive phenotype of MDD, indicating a potential therapeutic strategy for MDD-associated cognitive impairment by targeting the gut microbiota and bile acid metabolism.}, }
@article {pmid39719199, year = {2025}, author = {Qi, Y and Fu, R and Yan, C and Liu, X and Liu, N}, title = {Enrichment of a heterotrophic nitrifying and aerobic denitrifying bacterial consortium: Microbial community succession and nitrogen removal characteristics and mechanisms.}, journal = {Bioresource technology}, volume = {419}, number = {}, pages = {132013}, doi = {10.1016/j.biortech.2024.132013}, pmid = {39719199}, issn = {1873-2976}, mesh = {*Denitrification ; *Nitrogen/isolation &amp; purification/metabolism ; *Nitrification ; *Microbial Consortia/physiology ; Aerobiosis ; *Heterotrophic Processes ; *Bacteria/metabolism/genetics ; Water Pollutants, Chemical ; }, abstract = {This study cultivated a bacterial consortium (S60) from landfill leachate that exhibited effective heterotrophic nitrification and aerobic denitrification (HN-AD) properties. Under aerobic conditions, the removal of NH4[+]-N reached 100 % when the S60 consortium utilised NH4[+]-N either as the sole nitrogen source or in combination with NO2[-]-N and NO3[-]-N. Optimal HN-AD performance was achieved with sodium acetate as a carbon source and a pH of 7.0-8.0, dissolved oxygen concentration of 4.0-5.0 mg/L, and a C/N ratio of 10. Furthermore, the presence of functional genes (amoA, hao, napA, nirK, nirS, nosZ), hydroxylamine oxidase, nitrate reductase, and nitrite reductase was confirmed in the S60 consortium. Drawing from these findings, two HN-AD pathways were delineated: NH4[+]-N → NH2OH → NO2[-]-N → NO3[-]-N → NO2[-]-N → NO → N2O → N2 and NH4[+]-N → NH2OH → N2O → N2. Metagenomic binning analysis of the S60 consortium uncovered complete pathways for dissimilatory nitrate reduction and denitrification within Halomonas, Zobellella, Stutzerimonas, Marinobacter, and Pannonibacter. These findings offer new insights into the application of HN-AD bacteria and their collaborative nitrogen removal in environments with varying nitrogen sources.}, }
@article {pmid39719110, year = {2025}, author = {Koné, A and Kané, F and Neal, A and Konate, I and Coulibaly, B and Dabitao, DK and Diarra, B and Sanogo, I and Sarro, YDS and Coulibaly, TA and Diallo, D and Samake, S and Dicko, I and Diallo, M and Diarra, A and Coulibaly, MD and Keita, D and Coulibaly, N and Koloma, I and Perou, M and Diarra, HB and Cisse, BE and Togo, ACG and Coulibaly, G and Traoré, FG and Sanogo, M and Diakité, M and Aboulhab, J and Akpa, E and Fouth-Tchos, K and Shaw-Saliba, K and Collins, J and Lu, XJ and Nischay, M and Wickiser, JK and Briese, T and Lipkin, WI and Chen, RY and Doumbia, S and Dao, S}, title = {Adding Virome Capture Metagenomic Sequencing to Conventional Laboratory Testing Increases Unknown Fever Etiology Determination in Bamako, Mali.}, journal = {The American journal of tropical medicine and hygiene}, volume = {112}, number = {3}, pages = {626-635}, pmid = {39719110}, issn = {1476-1645}, mesh = {Humans ; Male ; Mali/epidemiology ; Female ; Adolescent ; Child ; *Fever/virology/etiology/diagnosis ; Adult ; Child, Preschool ; *Virome/genetics ; *Metagenomics/methods ; Middle Aged ; Infant ; Young Adult ; }, abstract = {Unexplained fever poses significant diagnostic challenges in resource-limited settings like Bamako, Mali, where overlapping endemic diseases include malaria, HIV/AIDS, yellow fever, typhoid, and others. This study aimed to elucidate the infectious etiologies of acute febrile illnesses in this context. Acute febrile patients of any age were enrolled after informed consent or assent. Baseline clinical and demographic data were collected, and samples were analyzed by using rapid diagnostic tests, reverse transcriptase polymerase chain reaction, ELISA, and virus-targeted metagenomic sequencing (virome capture sequencing platform for vertebrate viruses [VirCapSeq-VERT]). Among 108 enrolled subjects, most were male (51.9%) and under 15 years old (56.5%). Measles virus was identified in 39.8% of cases, primarily among children. Other findings included Plasmodium spp. (12%), Salmonella spp. (13%), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; 8.7%). The virome capture sequencing platform for vertebrate viruses was used for 101 subjects, corroborating many routine test results and identifying additional cases of measles virus (1), SARS-CoV-2 (5), and numerous other agents. Notably, nearly all subjects showed evidence of herpesviruses (90%) and anelloviruses (98%). Hemorrhagic fever viruses were not observed. With the inclusion of VirCapSeq-VERT, identifiable pathogens were found in 79.6% of cases, leaving 20.4% without a clear etiology. The identification of more than one concurrent pathogen was common (41.5%). Integrating metagenomic sequencing with routine laboratory diagnostic testing enhances the detection of pathogens in acute febrile illnesses, highlighting its potential value in identifying infectious etiologies in resource-limited settings.}, }
@article {pmid39718972, year = {2025}, author = {Pittaluga, AM and Miccoli, FE and Guerrero, LD and Relling, AE}, title = {Effect of multispecies fungal extract supplementation on growth performance, nutrient digestibility, ruminal fermentation, and the rumen microbiome composition of beef cattle fed forage-based diets.}, journal = {Journal of animal science}, volume = {103}, number = {}, pages = {}, pmid = {39718972}, issn = {1525-3163}, support = {//Biopremix Technologies LLC/ ; OHO01461//USDA National Institute of Food and Agriculture/ ; }, mesh = {Animals ; Cattle/growth &amp; development/physiology/microbiology ; *Rumen/microbiology/drug effects ; *Digestion/drug effects ; Diet/veterinary ; Fermentation/drug effects ; Animal Feed/analysis ; Dietary Supplements/analysis ; *Gastrointestinal Microbiome/drug effects ; Male ; Animal Nutritional Physiological Phenomena ; Cross-Over Studies ; *Fungi/chemistry ; Nutrients/metabolism ; }, abstract = {Our objective was to evaluate the effect of a multispecies fungal extract (MFE) on growth performance, apparent total tract digestibility (ATTD), fermentation characteristics, and rumen microbiome composition of beef cattle fed forage-based diets. For experiment 1, ruminally cannulated Angus × SimAngus cows (n = 4; body weight [BW] = 569 ± 21 kg) were used in a randomized crossover design with two 21-d study periods and a 23-d washout period to evaluate the effect of dietary inclusion of an MFE on in situ digestion, ruminal fermentation, and the composition of the rumen microbiome. Treatments consisted of a forage-based diet with or without the inclusion of a MFE. Rumen samples were collected on days 5, 10, and 20. Experiment 2 evaluated different inclusion rates of the MFE in a randomized complete block design using Angus × SimAngus-crossbred steers (n = 80; BW = 370 ± 44 kg). Steers were blocked by BW and randomly assigned to one of four treatments (2 pens/treatment): diet with no MFE, 0.02%, 0.04%, and 0.08% of the MFE (dry matter [DM] basis). Steers were fed a forage-based diet for 122 d. Subsets of 10 steers/treatment were randomly selected for the determination of ATTD on d 20, 40, and 60. All data were analyzed using the MIXED procedure of SAS. In exp 1, adding the MFE to the diet tended to increase the ruminal disappearance rate of the DM on day 10 (P = 0.06). No interactions or treatment effects were observed for the short-chain fatty acid profile of the rumen fluid (P ≥ 0.13). Metagenomic analysis of the rumen microbiome showed an MFE × d interaction for the Fibrobacter genus (P = 0.01), which on day 20 was less abundant in the rumen of cows fed the MFE. In exp 2, steers supplemented with 0.04% of MFE had a lower average daily gain and were lighter at the end of the experiment (cubic, P ≤ 0.04) compared to steers supplemented with 0.02% MFE. Steers fed the diet with 0.02% of MFE had the greatest gain-to-feed ratio among the MFE-supplemented groups (cubic, P < 0.01). Dietary inclusion of the MFE increased neutral detergent fiber digestibility (linear, P = 0.05). Steers supplemented with 0.04% of MFE had the greatest acid detergent fiber digestibility among treatments (quadratic, P = 0.03). Collectively, results showed that ruminal disappearance rate and digestibility of forage-based diets increased due to MFE supplementation, but did not translate into growth performance improvements or beneficially alter rumen fermentation.}, }
@article {pmid39718602, year = {2025}, author = {Lotankar, M and Houttu, N and Mokkala, K and Laitinen, K}, title = {Diet-Gut Microbiota Relations: Critical Appraisal of Evidence From Studies Using Metagenomics.}, journal = {Nutrition reviews}, volume = {83}, number = {7}, pages = {e1917-e1938}, pmid = {39718602}, issn = {1753-4887}, mesh = {*Gastrointestinal Microbiome/genetics/physiology ; *Metagenomics ; Humans ; *Diet ; Dietary Fiber/administration &amp; dosage ; Randomized Controlled Trials as Topic ; Observational Studies as Topic ; }, abstract = {Diet may influence the gut microbiota and subsequently affect the host's health. Recent developments in methods analyzing the composition and function of the gut microbiota allow a deeper understanding of diet-gut microbiota relationships. A state-of-the-art methodology, shotgun metagenomics sequencing, offers a higher taxonomic resolution of the gut microbiota at the bacterial species and strain levels, and more accurate information regarding the functional potential of gut microbiota. Here, the available evidence on the relationship between diet and gut microbiota was critically reviewed, focusing on results emerging from recent metagenomics sequencing studies applied in randomized controlled trials and observational studies. The PubMed and Embase databases were used to search publications between January 2011 and September 2023. Thus far, the number of studies is limited, and the study designs and methods utilized have been variable. Nevertheless, the cumulative evidence from interventions relates to dietary fiber as a modifier of bacterial species, such as Anaerostipes hadrus and Faecalibacterium prausnitzii. Furthermore, observational studies have detected associations between different dietary patterns and food groups with certain microbial species. Utilization of metagenomics sequencing is becoming more common and will undoubtedly provide further insights into diet-gut microbiota relationships at the species level as well as their functional pathways in the near future. For reproducible results and to draw reliable conclusions across various studies on diet-gut microbiota relationships, there is a need for harmonization of the study designs and standardized ways of reporting.}, }
@article {pmid39716651, year = {2025}, author = {Xu, K and Liu, P and Qin, X and Wang, X and Shi, L and Wang, P and Wu, X and Xiao, H and Zhao, H and Zhong, Y and Zhang, C}, title = {Bacteriophage diversity and novelty revealed by metaviromic analysis of the gut virome in the medicinal Blaps rynchopetera.}, journal = {Microbial pathogenesis}, volume = {199}, number = {}, pages = {107249}, doi = {10.1016/j.micpath.2024.107249}, pmid = {39716651}, issn = {1096-1208}, mesh = {Animals ; *Bacteriophages/classification/genetics/isolation &amp; purification ; *Virome/genetics ; Genome, Viral ; High-Throughput Nucleotide Sequencing ; Phylogeny ; *Coleoptera/virology ; *Gastrointestinal Microbiome ; Metagenomics ; DNA, Viral/genetics ; *Gastrointestinal Tract/virology ; DNA Viruses/genetics/classification/isolation &amp; purification ; }, abstract = {The medicinal beetle Blaps rynchopetera is recognized for its antibacterial, anti-inflammatory, and immune-regulating properties. This study utilized metaviromics technology to systematically characterize the viral community within the gut of B. rynchopetera through high-throughput sequencing of gut contents, with a specific focus on the composition of its bacteriophage community. The sequencing generated 15,394 contigs exceeding 200 bp, which were assembled into 577 viral operational taxonomic units. Among these, dsDNA viruses constituted 52.33%, ssDNA viruses 11.09%, and Nucleo-Cytoplasmic Large DNA Viruses 11.78%, with 24.80% remaining unknown. Bacteriophages were the predominant viral community members, comprising 65.86% of the total, mainly distributed among five families: Peduoviridae, Schitoviridae, Drexlerviridae, Autographiviridae, and Casjensviridae, with 40.21% of the bacteriophages belonging to unclassified genera. Deep genomic assembly yielded 34 complete bacteriophage sequences, including nine sequences lacking significant similarity to existing viral genomes in BLAST analysis. The remaining sequences were classified as follows: four in Stephanstirmvirinae, three in Schitoviridae, three in Peduoviridae, one in Autographiviridae, one in Guernseyvirinae, one in Herelleviridae, one in Gordonclarkvirinae, one in Chaseviridae, and one in Salmondvirus, while nine bacteriophages remained unclassified. The results indicate that the gut bacteriophage community of B. rynchopetera is diverse and species-rich, exhibiting distinct characteristics compared to bacteriophage communities from honey bees and mosquitoes. These findings lay a foundation for further investigation into virus-microbiota interactions and virus-host relationships within the gut of B. rynchopetera.}, }
@article {pmid39716092, year = {2024}, author = {Chapman, JA and Wroot, E and Brown, T and Beck, LC and Embleton, ND and Berrington, JE and Stewart, CJ}, title = {Characterising the metabolic functionality of the preterm neonatal gut microbiome prior to the onset of necrotising enterocolitis: a pilot study.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {533}, pmid = {39716092}, issn = {1471-2180}, mesh = {Humans ; *Enterocolitis, Necrotizing/microbiology/metabolism ; *Gastrointestinal Microbiome ; Pilot Projects ; Infant, Newborn ; *Infant, Premature ; Female ; Male ; Bacteria/classification/metabolism/isolation &amp; purification/genetics ; Feces/microbiology ; Case-Control Studies ; Metagenome ; }, abstract = {BACKGROUND: Necrotising enterocolitis (NEC) is a devastating bowel disease that primarily occurs in infants born prematurely and is associated with abnormal gut microbiome development. While gut microbiome compositions associated with NEC have been well studied, there is a lack of experimental work investigating microbiota functions and their associations with disease onset. The aim of this pilot study was to characterise the metabolic functionality of the preterm gut microbiome prior to the onset of NEC compared with healthy controls.<br><br>RESULTS: Eight NEC infants were selected of median gestation 26.5 weeks and median day of life (DOL) of NEC onset 20, with one sample used per infant, collected within one to eight days (median four) before NEC onset. Each NEC case was matched to a control infant based on gestation and sample DOL, the main driver of microbiome&#xa0;composition in this population, giving a total cohort of 16 infants for this study. Dietary exposures were well matched. The microbiota of NEC and control infants showed similar wide-ranging metabolic functionalities. All 94 carbon sources were utilised to varying extents but NEC and control samples clustered separately by supervised ordination based on carbon&#xa0;source utilisation profiles. For a subset of eight samples (four NEC, four control) for which pre-existing metagenome data was available, microbiome composition was found to correlate significantly with metabolic activity measured on Biolog plates (p&#x2009;=&#x2009;0.035). Comparisons across all 16 samples showed the NEC microbiota to have greater utilisation of carbon sources that are the products of proteolytic fermentation, specifically amino acids. In pairwise comparisons, L-methionine was highly utilised in NEC samples, but poorly utilised in controls (p&#x2009;=&#x2009;0.043). Carbon sources identified as discriminatory for NEC also showed a greater enrichment for established markers of inflammatory disease, such as inflammatory bowel disease, irritable bowel syndrome and diverticular disease.<br><br>CONCLUSIONS: Before NEC onset, the preterm gut microbiota showed greater metabolic utilisation of amino acids, potentially indicating a shift from predominantly saccharolytic to proteolytic fermentation. Products of amino acid breakdown could therefore act as biomarkers for NEC development. A larger study is warranted, ideally with infants from multiple sites.}, }
@article {pmid39716039, year = {2025}, author = {Du, Q and Liu, X and Zhang, R and Hu, G and Liu, Q and Wang, R and Ma, W and Hu, Y and Fan, Z and Li, J}, title = {Placental and Fetal Microbiota in Rhesus Macaque: A Case Study Using Metagenomic Sequencing.}, journal = {American journal of primatology}, volume = {87}, number = {1}, pages = {e23718}, doi = {10.1002/ajp.23718}, pmid = {39716039}, issn = {1098-2345}, support = {//This work was supported by the National Natural Science Foundation of China (32171607)/ ; }, mesh = {Animals ; *Macaca mulatta/microbiology ; Female ; Pregnancy ; *Fetus/microbiology ; *Placenta/microbiology ; *Microbiota ; *Metagenomics ; Umbilical Cord/microbiology ; Gastrointestinal Microbiome ; }, abstract = {Recent evidence challenging the notion of a sterile intrauterine environment has sparked research into the origins and effects of fetal microbiota on immunity development during gestation. Rhesus macaques (RMs) serve as valuable nonhuman primate models due to their similarities to humans in development, placental structure, and immune response. In this study, metagenomic analysis was applied to the placenta, umbilical cord, spleen, gastrointestinal tissues of an unborn RM fetus, and the maternal intestine, revealing the diversity and functionality of microbes in these tissues. Additionally, gut metagenomic data of adult Rhesus macaques from our previous study, along with data from a human fetus obtained from public databases, were included for comparison. We observed substantial microbial sharing between the mother and fetus, with the microbial composition of the placenta and umbilical cord more closely resembling that of the fetal organs than the maternal intestine. Notably, compared with other adult RMs, there was a clear convergence between maternal and fetal microbiota, alongside distinct differences between the microbiota of adults and the fetus, which underscores the unique microbial profiles in fetal environments. Furthermore, the fetal microbiota displayed a less developed carbohydrate metabolism capacity than adult RMs. It also shared antibiotic resistance genes with both maternal and adult RM microbiomes, indicating potential vertical transmission. Comparative analysis of the metagenomes between the RM fetus and a human fetus revealed significant differences in microbial composition and genes, yet also showed similarities in certain abundant microbiota. Collectively, our results contribute to a more comprehensive understanding of the intrauterine microbial environment in macaques.}, }
@article {pmid39715919, year = {2024}, author = {Jiang, ZB and Zhang, H and Tian, JJ and Guo, HH and Zhou, LR and Ma, XL}, title = {The Microbial Diversity of Biological Moss Crust: Application in Saline-Alkali Soil Management.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {162}, pmid = {39715919}, issn = {1432-184X}, support = {82160672//the National Natural Science Foundation of China/ ; 2022AAC05041 and 2023AAC05048//Outstanding Youth Program of Ningxia Natural Science Foundation/ ; 2021BEB04019//the Key R&amp;D Projects in Ningxia/ ; 2021AAC03210 and 2019AAC03113//the Ningxia Natural Science Foundation/ ; }, mesh = {*Soil/chemistry ; *Soil Microbiology ; *Bryophyta/microbiology ; China ; Biodiversity ; Alkalies/analysis ; Salinity ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Chlorophyll/analysis ; }, abstract = {Soil salinization poses a substantial threat to global food security, particularly under the influence of climate change, and is recognized as one of the most urgent challenges in land degradation. This study aims to elucidate the challenges associated with managing arid and semi-arid saline-alkali lands in China's Ningxia province and propose feasible solutions. To assess moss crust colonization, we measured changes in organic matter and chlorophyll levels. Additionally, we investigated the impact of an interlayer composed of Goji berry root bark using liquid chromatography-mass spectrometry analysis, biological enzyme activity analysis, and metagenomic sequencing. A total of 45 endophytes were isolated from the moss crust. The most significant colonization of moss crusts was observed when the Goji berry root bark was used as the interlayer, resulting in a significant increase in chlorophyll content. Several responses were identified as pivotal factors facilitating moss crust growth when the Goji berry root bark was used as the interlayer. In saline-alkali soil, the Goji berry root bark interlayer increased the activities of sucrase, urease, and alkaline phosphatase. Metagenomic data analysis revealed variations in the relative abundance of microorganisms at the phylum level, although these differences were not statistically significant. Evaluation of the impact of physical isolation and moss crust transplantation on the ecological restoration of saline-alkali soil using liquid chromatography-tandem mass spectrometry and metagenomic sequencing indicated that the Goji berry root bark as a physical isolation method promotes moss crust colonization in saline-alkali soil and increases soil organic matter and nutrient elements, offering valuable insights for the ecological management of saline-alkali land and serving as a reference for future research in this field.}, }
@article {pmid39714548, year = {2024}, author = {Wang, W and Zhang, Z and Sun, M and Li, C and Yan, M and Wang, C}, title = {Mechanism of decolorization and degradation of direct brown D3G by a halo-thermophilic consortium.}, journal = {Extremophiles : life under extreme conditions}, volume = {29}, number = {1}, pages = {11}, pmid = {39714548}, issn = {1433-4909}, support = {22B610001//the Key Scientific Research Project in Colleges and Universities of Henan Province of China/ ; HDXJJG2023-058//the teaching reform project of Henan University/ ; }, mesh = {*Azo Compounds/metabolism/chemistry ; Microbial Consortia ; Biodegradation, Environmental ; Halomonas/metabolism ; Coloring Agents/metabolism/chemistry ; Laccase/metabolism ; Bacillus/metabolism ; }, abstract = {Azo dye wastewater has garnered significant attention from researchers because of its association with high-temperature, high-salt, and high-alkali conditions. In this study, consortium ZZ efficiently decolorized brown D3G under halophilic and thermophilic conditions. he results indicated that consortium ZZ, which was mainly dominated by Marinobacter, Bacillus, and Halomonas, was achieved decolorization rates ranging from 1 to 10% at temperatures between 40 °C and 50 °C, while maintaining a pH range of 7 to 10 for direct brown D3G degradation. Through the comprehensive utilization of UV-vis spectral analysis, Fourier transform infrared (FTIR), gas chromatography mass spectrometric (GC-MS) techniques, as well as metagenomic analysis, the decolorization and degradation pathway of direct brown by consortium ZZ was proposed. The azo dye reductase, lignin peroxidase, and laccase were also highly expressed in the decolorization process. Additionally, phytotoxicity tests using seeds of Cucumis sativus and Oryza sativa revealed that the intermediates generated showed no significant toxicity compared with distilled water. This investigation elucidated the pivotal contribution of consortium ZZ to azo dye degradation and provided novel theoretical insights along with practical guidance for azo dye treatment at halo-thermophilic conditions.}, }
@article {pmid39714212, year = {2025}, author = {Fang, Y and Meng, L and Xia, J and Gotoh, Y and Hayashi, T and Nagasaki, K and Endo, H and Okazaki, Y and Ogata, H}, title = {Genome-resolved year-round dynamics reveal a broad range of giant virus microdiversity.}, journal = {mSystems}, volume = {10}, number = {1}, pages = {e0116824}, pmid = {39714212}, issn = {2379-5077}, support = {21H05057//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; Nos. 2018-31//Kyoto University | Institute for Chemical Research, Kyoto University (ICR)/ ; Nos. 2017-25//Kyoto University | Institute for Chemical Research, Kyoto University (ICR)/ ; 22H00384//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; 22H00385//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; 16H06279//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; 16H06429//Ministry of Education, Culture, Sports, Science and Technology (MEXT)/ ; 16K21723//Ministry of Education, Culture, Sports, Science and Technology (MEXT)/ ; 16H06437//Ministry of Education, Culture, Sports, Science and Technology (MEXT)/ ; Nos. 2021-33//Kyoto University | Institute for Chemical Research, Kyoto University (ICR)/ ; Nos. 2019-33//Kyoto University | Institute for Chemical Research, Kyoto University (ICR)/ ; }, mesh = {*Genome, Viral ; Seawater/virology ; *Giant Viruses/genetics/classification ; Metagenomics/methods ; Seasons ; Biodiversity ; Metagenome ; Genetic Variation ; Phylogeny ; }, abstract = {Giant viruses are crucial for marine ecosystem dynamics because they regulate microeukaryotic community structure, accelerate carbon and nutrient cycles, and drive the evolution of their hosts through co-evolutionary processes. Previously reported long-term observations revealed that these viruses display seasonal fluctuations in abundance. However, the underlying genetic mechanisms driving such dynamics of these viruses remain largely unknown. In this study, we investigated the dynamics of giant viruses using time-series metagenomes from eutrophic coastal seawater samples collected over 20 months. A newly developed computational pipeline generated 1,065 high-quality genomes covering six major giant virus lineages. These genomic data revealed year-round recovery of the viral community structure at the study site and distinct dynamics of viral populations that were classified as persistent (n = 9), seasonal (n = 389), sporadic (n = 318), or others. By profiling the intra-species nucleotide-resolved microdiversity through read mapping, we also identified year-round recovery dynamics at subpopulation level for viruses classified as persistent or seasonal. Our results further indicated that giant viruses with broader niche breadth tended to exhibit higher levels of microdiversity. We argue that greater microdiversity of viruses likely enhances adaptability and thus survival under the virus-host arms race during prolonged interactions with their hosts.IMPORTANCERecent genome-resolved metagenomic surveys have uncovered the vast genomic diversity of giant viruses, which play significant roles in aquatic ecosystems by acting as bloom terminators and influencing biogeochemical cycles. However, the relationship between the ecological dynamics of giant viruses and underlying genetic structures of viral populations remains unresolved. In this study, we performed deep metagenomic sequencing of seawater samples collected across a time-series from a coastal area in Japan. The results revealed a significant positive correlation between microdiversity and temporal persistence of giant virus populations, suggesting that population structure is a crucial factor for adaptation and survival in the interactions with their hosts.}, }
@article {pmid39714193, year = {2025}, author = {Midot, F and Goh, KM and Liew, KJ and Lau, SYL and Espenberg, M and Mander, &#xdc; and Melling, L}, title = {Temporal dynamics of soil microbial C and N cycles with GHG fluxes in the transition from tropical peatland forest to oil palm plantation.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0198624}, pmid = {39714193}, issn = {1098-5336}, support = {P015 790102009//The Twelfth Malaysian Plan through Ministry of Education, Innovation, and Talent Development of Sarawak/ ; FRGS/1/2023/STG02/UTM/02/1,Q.J130000.3854.22H63//Ministry of Higher Education of Malaysia through the Fundamental Research Grant Scheme and UTM Fundamental Research Grant/ ; No 101079192 (MLTOM23003R)//European Union Horizon program/ ; No 101096403 (MLTOM23415R)//EC | European Research Council (ERC)/ ; PRG-2302//Estonian Research Council/ ; }, mesh = {*Soil Microbiology ; *Greenhouse Gases/metabolism/analysis ; Malaysia ; Soil/chemistry ; Forests ; Methane/metabolism/analysis ; *Carbon Cycle ; Bacteria/metabolism/classification/genetics ; Microbiota ; *Nitrogen Cycle ; Wetlands ; Nitrous Oxide/analysis/metabolism ; Nitrogen/metabolism ; Palm Oil ; Arecaceae ; Carbon/metabolism ; }, abstract = {Tropical peatlands significantly influence local and global carbon and nitrogen cycles, yet they face growing pressure from anthropogenic activities. Land use changes, such as peatland forests conversion to oil palm plantations, affect the soil microbiome and greenhouse gas (GHG) emissions. However, the temporal dynamics of microbial community changes and their role as GHG indicators are not well understood. This study examines the dynamics of peat chemistry, soil microbial communities, and GHG emissions from 2016 to 2020 in a logged-over secondary peat swamp forest in Sarawak, Malaysia, which transitioned to an oil palm plantation. This study focuses on changes in genetic composition governing plant litter degradation, methane (CH4), and nitrous oxide (N2O) fluxes. Soil CO2 emission increased (doubling from approximately 200 mg C m[-2] h[-1]), while CH4 emissions decreased (from 200 µg C m[-2] h[-1] to slightly negative) following land use changes. The N2O emissions in the oil palm plantation reached approximately 1,510 µg N m[-2] h[-1], significantly higher than previous land uses. The CH4 fluxes were driven by groundwater table, humification levels, and C:N ratio, with Methanomicrobia populations dominating methanogenesis and Methylocystis as the main CH4 oxidizer. The N2O fluxes correlated with groundwater table, total nitrogen, and C:N ratio with dominant nirK-type denitrifiers (13-fold nir to nosZ) and a minor role by nitrification (a threefold increase in amoA) in the plantation. Proteobacteria and Acidobacteria encoding incomplete denitrification genes potentially impact N2O emissions. These findings highlighted complex interactions between microbial communities and environmental factors influencing GHG fluxes in altered tropical peatland ecosystems.IMPORTANCETropical peatlands are carbon-rich environments that release significant amounts of greenhouse gases when drained or disturbed. This study assesses the impact of land use change on a secondary tropical peat swamp forest site converted into an oil palm plantation. The transformation lowered groundwater levels and changed soil properties. Consequently, the oil palm plantation site released higher carbon dioxide and nitrous oxide compared to previous land uses. As microbial communities play crucial roles in carbon and nitrogen cycles, this study identified environmental factors associated with microbial diversity, including genes and specific microbial groups related to nitrous oxide and methane emissions. Understanding the factors driving microbial composition shifts and greenhouse gas emissions in tropical peatlands provides baseline information to potentially mitigate environmental consequences of land use change, leading to a broader impact on climate change mitigation efforts and proper land management practices.}, }
@article {pmid39714168, year = {2025}, author = {Bhosle, A and Jackson, MI and Walsh, AM and Franzosa, EA and Badri, DV and Huttenhower, C}, title = {Response of the gut microbiome and metabolome to dietary fiber in healthy dogs.}, journal = {mSystems}, volume = {10}, number = {1}, pages = {e0045224}, pmid = {39714168}, issn = {2379-5077}, support = {A-2019-687-HL//Hill's Pet Nutrition (Hill's)/ ; }, mesh = {Animals ; *Dietary Fiber/metabolism/pharmacology ; Dogs ; *Gastrointestinal Microbiome/drug effects ; *Metabolome ; Feces/microbiology ; Male ; Animal Feed/analysis ; Female ; Bacteria/classification/genetics/metabolism ; Fatty Acids, Volatile/metabolism ; Metagenomics ; }, abstract = {UNLABELLED: Dietary fiber confers multiple health benefits originating from the expansion of beneficial gut microbial activity. However, very few studies have established the metabolic consequences of interactions among specific fibers, microbiome composition, and function in either human or representative animal models. In a study design reflective of realistic population dietary variation, fecal metagenomic and metabolomic profiles were analyzed from healthy dogs fed 12 test foods containing different fiber sources and quantities (5-13% as-fed basis). Taxa and functions were identified whose abundances were associated either with overall fiber intake or with specific fiber compositions. Fourteen microbial species were significantly enriched in response to ≥1 specific fiber source; enrichment of fiber-derived metabolites was more pronounced in response to these fiber sources. Positively associated fecal metabolites, including short-chain fatty acids, acylglycerols, fiber bound sugars, and polyphenols, co-occurred with microbes enriched in specific food groups. Critically, the specific metabolite pools responsive to differential fiber intake were dependent on differences both in individual microbial community membership and in overall ecological configuration. This helps to explain, for the first time, differences in microbiome-diet associations observed in companion animal epidemiology. Thus, our study corroborates findings in human cohorts and reinforces the role of personalized microbiomes even in seemingly phenotypically homogeneous subjects.<br><br>IMPORTANCE: Consumption of dietary fiber changes the composition of the gut microbiome and, to a larger extent, the associated metabolites. Production of health-relevant metabolites such as short-chain fatty acids from fiber depends both on the consumption of a specific fiber and on the enrichment of beneficial metabolite-producing species in response to it. Even in a seemingly homogeneous population, the benefit received from fiber consumption is personalized and emphasizes specific fiber-microbe-host interactions. These observations are relevant for both population-wide and personalized nutrition applications.}, }
@article {pmid39714161, year = {2025}, author = {Neumann, CJ and Mohammadzadeh, R and Woh, PY and Kobal, T and Pausan, M-R and Shinde, T and Haid, V and Mertelj, P and Weiss, E-C and Kolovetsiou-Kreiner, V and Mahnert, A and Kumpitsch, C and Jantscher-Krenn, E and Moissl-Eichinger, C}, title = {First-year dynamics of the anaerobic microbiome and archaeome in infants' oral and gastrointestinal systems.}, journal = {mSystems}, volume = {10}, number = {1}, pages = {e0107124}, pmid = {39714161}, issn = {2379-5077}, support = {10.55776/KLI784 and 10.55776/DOC31//Austrian Science Fund (FWF)/ ; }, mesh = {Humans ; Infant ; *Mouth/microbiology ; *Gastrointestinal Microbiome ; *Archaea/classification/genetics/isolation &amp; purification ; Breast Feeding ; Female ; Male ; *Gastrointestinal Tract/microbiology ; Anaerobiosis ; *Microbiota ; Longitudinal Studies ; }, abstract = {UNLABELLED: Recent research provides new insights into the early establishment of the infant gut microbiome, emphasizing the influence of breastfeeding on the development of gastrointestinal microbiomes. In our study, we longitudinally examined the taxonomic and functional dynamics of the oral and gastrointestinal tract (GIT) microbiomes of healthy infants (n = 30) in their first year, focusing on the often-over-looked aspects, the development of archaeal and anaerobic microbiomes. Breastfed (BF) infants exhibit a more defined transitional phase in their oral microbiome compared to non-breastfed (NBF) infants, marked by a decrease in Streptococcus and the emergence of anaerobic genera such as Granulicatella. This phase, characterized by increased alpha-diversity and significant changes in beta-diversity, occurs earlier in NBF infants (months 1-3) than in BF infants (months 4-6), suggesting that breastfeeding supports later, more defined microbiome maturation. We demonstrated the presence of archaea in the infant oral cavity and GIT microbiome from early infancy, with Methanobrevibacter being the predominant genus. Still, transient patterns show that no stable archaeome is formed. The GIT microbiome exhibited gradual development, with BF infants showing increased diversity and complexity between the third and eighth months, marked by anaerobic microbial networks. NBF infants showed complex microbial co-occurrence patterns from the start. These strong differences between BF and NBF infants' GIT microbiomes are less pronounced on functional levels than on taxonomic levels. Overall, the infant microbiome differentiates and stabilizes over the first year, with breastfeeding playing a crucial role in shaping anaerobic microbial networks and overall microbiome maturation.<br><br>IMPORTANCE: The first year of life is a crucial period for establishing a healthy human microbiome. Our study analyses the role of archaea and obligate anaerobes in the development of the human oral and gut microbiome, with a specific focus on the impact of breastfeeding in this process. Our findings demonstrated that the oral and gut microbiomes of breastfed infants undergo distinct phases of increased dynamics within the first year of life. In contrast, the microbiomes of non-breastfed infants are more mature from the first month, leading to a steadier development without distinct transitional phases in the first year. Additionally, we found that archaeal signatures are present in infants under 1 year of age, but they do not form a stable archaeome. In contrast to this, we could track specific bacterial strains transitioning from oral to gut or persisting in the gut over time.}, }
@article {pmid39713824, year = {2024}, author = {Karesh, WB}, title = {Shifting from wildlife disease threats to wildlife health.}, journal = {Revue scientifique et technique (International Office of Epizootics)}, volume = {Special Edition}, number = {}, pages = {141-144}, doi = {10.20506/rst.SE.3568}, pmid = {39713824}, issn = {0253-1933}, mesh = {Animals ; *Animals, Wild ; Humans ; Zoonoses/prevention &amp; control ; Conservation of Natural Resources ; Animal Diseases/prevention &amp; control/epidemiology ; }, abstract = {The evolution of wildlife disease management and surveillance, as documented in the World Organisation for Animal Health's Scientific and Technical Review, reflects a deepening understanding of the links between wildlife health, ecosystem integrity and human well-being. Early work, beginning with the World Assembly of Delegates in 1954, primarily focused on diseases like rabies. This focus expanded over time to include broader concerns such as the impacts of climate change, habitat loss and increased human-wildlife interactions on wildlife health. By the late 20th century, the emphasis had shifted towards improved practices for wildlife disease control and the development of advanced diagnostic methods and vaccines. Articles in the Review highlight the growing complexity of wildlife diseases and the need for holistic management strategies. The adoption in recent years of cutting-edge technologies like CRISPR-Cas systems and metagenomics points to a future of more proactive and integrated approaches to wildlife disease management. There is still a need to address not just the consequences of wildlife diseases but also their anthropogenic drivers. The latest perspectives advocate for nature-based solutions, expanded partnerships and systems-level thinking to effectively tackle 21st-century challenges in wildlife and biodiversity conservation.}, }
@article {pmid39711113, year = {2025}, author = {Olivares, C and Ruppé, E and Ferreira, S and Corbel, T and Andremont, A and de Gunzburg, J and Guedj, J and Burdet, C}, title = {A modelling framework to characterize the impact of antibiotics on the gut microbiota diversity.}, journal = {Gut microbes}, volume = {17}, number = {1}, pages = {2442523}, doi = {10.1080/19490976.2024.2442523}, pmid = {39711113}, issn = {1949-0984}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Anti-Bacterial Agents/pharmacology/administration &amp; dosage ; *Feces/microbiology ; *Bacteria/classification/genetics/drug effects/isolation &amp; purification ; *RNA, Ribosomal, 16S/genetics ; Adult ; Ceftazidime/pharmacology/administration &amp; dosage ; Male ; Moxifloxacin/pharmacology/administration &amp; dosage ; Drug Combinations ; Ceftriaxone/pharmacology/administration &amp; dosage ; Female ; Azabicyclo Compounds/pharmacology/administration &amp; dosage ; Biodiversity ; Young Adult ; Healthy Volunteers ; Piperacillin, Tazobactam Drug Combination ; }, abstract = {Metagenomic sequencing deepened our knowledge about the role of the intestinal microbiota in human health, and several studies with various methodologies explored its dynamics during antibiotic treatments. We compared the impact of four widely used antibiotics on the gut bacterial diversity. We used plasma and fecal samples collected during and after treatment from healthy volunteers assigned to a 5-day treatment either by ceftriaxone (1 g every 24 h through IV route), ceftazidime/avibactam (2 g/500 mg every 8 h through IV route), piperacillin/tazobactam (1 g/500 mg every 8 h through IV route) or moxifloxacin (400 mg every 24 h through oral route). Antibiotic concentrations were measured in plasma and feces, and bacterial diversity was assessed by the Shannon index from 16S rRNA gene profiling. The relationship between the evolutions of antibiotic fecal exposure and bacterial diversity was modeled using non-linear mixed effects models. We compared the impact of antibiotics on gut microbiota diversity by simulation, using various reconstructed pharmacodynamic indices. Piperacillin/tazobactam was characterized by the highest impact in terms of intensity of perturbation (maximal [IQR] loss of diversity of 27.3% [1.9; 40.0]), while moxifloxacin had the longest duration of perturbation, with a time to return to 95% of baseline value after the last administration of 13.2 d [8.3; 19.1]. Overall, moxifloxacin exhibited the highest global impact, followed by piperacillin/tazobactam, ceftazidime/avibactam and ceftriaxone. Their AUC between day 0 and day 42 of the change of diversity indices from day 0 were, respectively, -13.2 Shannon unit.day [-20.4; -7.9], -10.9 Shannon unit.day [-20.4; -0.6] and -10.1 Shannon unit.day [-18.3; -4.6]. We conclude that antibiotics alter the intestinal diversity to varying degrees, both within and between antibiotics families. Such studies are needed to help antibiotic stewardship in using the antibiotics with the lowest impact on the intestinal microbiota.}, }
@article {pmid39710261, year = {2025}, author = {Guerreiro, JF and Pires, AJ and Nunes, M and Esteves, A and Chambel, L and Pascoal, P and Pereira, M and Fangueiro, D and Tavares, L and Dias, R and Bexiga, R and Oliveira, M}, title = {Biochar supplementation affects the microbiome of recycled manure solids for cow bedding: A metagenomic analysis.}, journal = {Journal of dairy science}, volume = {108}, number = {3}, pages = {2620-2631}, doi = {10.3168/jds.2024-25616}, pmid = {39710261}, issn = {1525-3198}, mesh = {Animals ; Cattle ; *Manure/microbiology ; *Charcoal ; *Microbiota ; Female ; }, abstract = {The widespread use of recycled manure solids (RMS) as cow bedding material is not without risks, because cattle manure may act as a vehicle for pathogenic and antimicrobial-resistant bacteria dissemination. Thus, our aim was to evaluate RMS supplemented with a pine biochar produced in Portugal as a new cow bedding material, because the use of biochar has been shown to have the potential to mitigate the effect of relevant bacterial species when added to animal manure microbiota. Our experimental setup consisted on fresh RMS samples that were collected on a commercial dairy farm and placed in naturally-ventilated containers for a total of 4 groups: (1) nonsupplemented RMS, (2) RMS supplemented with 2.5% (wt/wt) of biochar, (3) RMS supplemented with 5% (wt/wt) of biochar, and (4) RMS supplemented with 10% (wt/wt) of biochar. Sampling was performed at 4 different incubation times (0, 5, 15, and 30 d) and in 2 distinct seasons: April through May (humid season) and June through July (dry season). The resulting 32 samples were subjected to DNA extraction and their microbiome profile determined through complete 16S rDNA gene sequencing using Nanopore next-generation sequencing. We observed that biochar supplementation clearly altered the microbiome of RMS, which was reflected in changes in populations' diversity and the relative abundance of relevant pathogenic bacteria. In particular, we found that long-term storage (30 d) was more beneficial than short-term storage, an effect that was more evident for samples supplemented with 2.5% or 5% biochar. In both seasons, those concentrations of biochar led to a decrease in the levels of several mastitis-causing agents (Enterobacteriaceae, streptococci, enterococci, and staphylococci). In addition, we also observed a reduction in the levels of Salmonella spp. and gram-positive bacilli in the biochar-supplemented samples. Unexpectedly, however, those same conditions yielded an increase in the abundance of Brucella spp., a group that includes important infectious agents, highlighting the need for a deeper evaluation of the effect of biochar supplementation of RMS to ensure the future safe and sustainable use of this environmentally-friendly resource in animal production.}, }
@article {pmid39710013, year = {2025}, author = {He, B and Xu, S and Schooling, CM and Leung, GM and Ho, JWK and Au Yeung, SL}, title = {Gut microbiome and obesity in late adolescence: A case-control study in "Children of 1997" birth cohort.}, journal = {Annals of epidemiology}, volume = {101}, number = {}, pages = {58-66}, doi = {10.1016/j.annepidem.2024.12.009}, pmid = {39710013}, issn = {1873-2585}, mesh = {Humans ; *Gastrointestinal Microbiome ; Case-Control Studies ; Female ; Male ; Adolescent ; *Pediatric Obesity/microbiology/epidemiology ; *Feces/microbiology ; Diabetes Mellitus, Type 2/microbiology/epidemiology ; Birth Cohort ; Bacteroides/isolation &amp; purification ; }, abstract = {PURPOSE: Although the gut microbiome is important in human health, its relation to adolescent obesity remains unclear. Here we assessed the associations of the gut microbiome with adolescent obesity in a case-control study.<br><br>METHODS: In the "Children of 1997" birth cohort, participants with and without obesity at &#x223c;17.4 years were 1:1 matched on sex, physical activity, parental education and occupation (n&#x202f;=&#x202f;312). Fecal gut microbiome composition and pathways were assessed via shotgun metagenomic sequencing. The association of microbiota species with obesity was evaluated using conditional logistic regression. We explored the association of the obesity-relevant species with adolescent metabolomics using multivariable linear regression, and causal relationships with type 2 diabetes using Mendelian randomization analysis.<br><br>RESULTS: Gut microbiota in the adolescents with obesity exhibited lower richness (p&#x202f;=&#x202f;0.031) and evenness (p&#x202f;=&#x202f;0.014) compared to controls. Beta diversity revealed differences in the microbiome composition in two groups (p&#x202f;=&#x202f;0.034). Lower relative abundance of Clostridium spiroforme, Clostridium phoceensis and Bacteroides uniformis were associated with higher obesity risk (q<0.15). Lower Bacteroides uniformis was associated with higher branched-chain amino acid, potentially contributing to higher type 2 diabetes risk.<br><br>CONCLUSION: Adolescents with obesity had a distinct gut microbiota profile compared to the controls, possibly linked to metabolic pertubation and related diseases.}, }
@article {pmid39709798, year = {2025}, author = {Wang, RX and Zhou, HB and Gao, JX and Bai, WF and Wang, J and Bai, YC and Jiang, SY and Chang, H and Shi, SL}, title = {Metagenomics and metabolomics to investigate the effect of Amygdalus mongolica oil on intestinal microbiota and serum metabolites in rats.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {136}, number = {}, pages = {156335}, doi = {10.1016/j.phymed.2024.156335}, pmid = {39709798}, issn = {1618-095X}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Male ; Metabolomics ; Rats, Sprague-Dawley ; Rats ; Metagenomics ; Fibrosis/drug therapy ; Kidney/pathology/drug effects ; *Plant Oils/pharmacology ; Disease Models, Animal ; }, abstract = {BACKGROUND: Renal fibrosis (RF) is an inevitable consequence of multiple manifestations of progressive chronic kidney diseases (CKDs). Mechanism of Amygdalus mongolica (Maxim.) in the treatment of RF needs further investigation.<br><br>PURPOSE: The study further investigated the potential mechanism of A. mongolica in the treatment of RF.<br><br>METHODS: A rat model of RF was induced by unilateral ureteral obstruction (UUO), followed by treatment with varying dosages of A. mongolica oil for 4 weeks. Body weight was measured weekly. We detected serum levels of interleukin (IL)-6, IL-1&#x3b2;, type &#x2162; procollagen (Col-&#x2162;), type IV collagen (Col-&#x2163;), laminin (LN), hyaluronidase (HA), and tissue levels of albumin (ALB), blood urea nitrogen (BUN), creatinine (Cre), superoxide dismutase (SOD), malondialdehyde (MDA), and hydroxyproline (HYP). Shotgun metagenomics analyzed the composition of the intestinal microbiota. High-performance liquid chromatography coupled with a quadrupole-exactive mass spectrometer (HPLC-Q-Exactive-MS) monitored changes in metabolite levels in serum and gut. Multiple reaction monitoring-mass spectrometry (MRM-MS) determined the levels of amino acids in serum.<br><br>RESULTS: A. mongolica oil significantly alleviated indicators related to RF (p < 0.05). A. mongolica oil reduced the ratio of Firmicutes to Bacteroidetes and restored the balance of intestinal microbiota in rats with RF. A. mongolica oil modulated levels of metabolites in gut content and serum. It regulated 11 metabolic pathways including arachidonic acid metabolism. Targeted metabolomics of amino acids showed that 17 amino acids were significantly changed by A. mongolica oil, including L-glycine, L-serine and L-glutamine.<br><br>CONCLUSION: A. mongolica oil regulates intestinal microbiota and metabolites, restoring amino acid metabolism to treat RF.}, }
@article {pmid39709651, year = {2025}, author = {Cheng, E and Hung, SC and Lin, TY}, title = {Association of trimethylamine N-oxide and metabolites with kidney function decline in patients with chronic kidney disease.}, journal = {Clinical nutrition (Edinburgh, Scotland)}, volume = {44}, number = {}, pages = {239-247}, doi = {10.1016/j.clnu.2024.12.001}, pmid = {39709651}, issn = {1532-1983}, mesh = {Humans ; *Methylamines/blood ; Female ; *Renal Insufficiency, Chronic/blood/physiopathology ; Male ; Aged ; *Gastrointestinal Microbiome/physiology ; *Glomerular Filtration Rate ; Prospective Studies ; *Carnitine/blood ; Middle Aged ; *Choline/blood ; Kidney/physiopathology ; Disease Progression ; Betaine/blood/analogs &amp; derivatives ; }, abstract = {BACKGROUND: Trimethylamine N-oxide (TMAO) is a gut microbial metabolite derived from dietary l-carnitine and choline. High plasma TMAO levels are associated with cardiovascular disease and overall mortality, but little is known about the associations of TMAO and related metabolites with the risk of kidney function decline among patients with chronic kidney disease (CKD).<br><br>METHODS: We prospectively followed 152 nondialysis patients with CKD stages 3-5 and measured plasma TMAO and related metabolites (trimethylamine [TMA], choline, carnitine, and &#x3b3;-butyrobetaine) via liquid chromatography&#x2012;mass spectrometry. An estimated glomerular filtration rate (eGFR) slope >3&#xa0;ml/min/per 1.73&#xa0;m[2] per year was defined as a rapid decline. We performed logistic regression to determine the probability of rapid or slow eGFR decline, with each metabolite as the main predictor. The gut microbiota was profiled via whole metagenomic sequencing.<br><br>RESULTS: The participants had a median age of 66 years, 41.4&#xa0;% were women, 39.5&#xa0;% had diabetes, and the median eGFR was 23&#xa0;mL/min/1.73&#xa0;m[2]. A rapid decrease in the eGFR occurred in 65 patients (42.8&#xa0;%) over a median follow-up of 3.3 years. After adjustment for baseline eGFR, proteinuria, and clinical factors, plasma TMAO levels were independently associated with increased odds of rapid eGFR decline (odds ratio, 2.42; 95&#xa0;% CI, 1.36-4.32), whereas plasma TMA, choline, carnitine, and &#x3b3;-butyrobetaine levels were not. Patients who exhibited rapid eGFR decline had a distinct gut microbial composition characterized by increased &#x3b1;-diversity and an abundance of TMA-producing bacteria, including those of the genera Desulfovibrio and Collinsella tanakaei, as well as increased expression of the TMA-producing enzymes bbuA and cutC.<br><br>CONCLUSION: Our findings suggest the relevance of plasma TMAO in the progression of kidney disease among patients with CKD.}, }
@article {pmid39709594, year = {2025}, author = {Smith, MZ and York, M and Townsend, KS and Martin, LM and Gull, T and Coghill, LM and Ericsson, AC and Johnson, PJ}, title = {Effects of orally administered clioquinol on the fecal microbiome of horses.}, journal = {Journal of veterinary internal medicine}, volume = {39}, number = {1}, pages = {e17276}, pmid = {39709594}, issn = {1939-1676}, mesh = {Animals ; Horses ; *Feces/microbiology ; *Clioquinol/pharmacology/administration &amp; dosage ; Female ; Male ; Administration, Oral ; Prospective Studies ; Gastrointestinal Microbiome/drug effects ; RNA, Ribosomal, 16S/genetics ; Cohort Studies ; }, abstract = {BACKGROUND: Whereas restoration of fecal consistency after treatment with clioquinol for chronic diarrhea and free fecal water syndrome has been attributed to its antiprotozoal properties, actions of clioquinol on the colonic bacterial microbiota have not been investigated.<br><br>OBJECTIVES: Characterize the dynamics of fecal microbial diversity before, during, and after PO administration of clioquinol to healthy horses.<br><br>STUDY DESIGN: Experimental prospective cohort study using a single horse group.<br><br>METHODS: Eight healthy adult horses received PO clioquinol (10&#x2009;g, daily) for 7&#x2009;days. Feces were obtained daily for 7&#x2009;days before, during, and after conclusion of treatment, and again 3&#x2009;months later. Libraries of 16S rRNA V4 region amplicons generated from fecal DNA were sequenced using the Illumina sequencing platform. Bioinformatic analysis was undertaken with QIIME2 and statistical analyses included analysis of variance (ANOVA) and permutational multivariate ANOVA (PERMANOVA).<br><br>RESULTS: The richness and composition of the fecal microbiome was altered after administration of clioquinol, reaching a maximum effect by the fifth day of administration. Changes included a 90% decrease in richness, and compensatory expansion of facultative anaerobes including Streptococcaceae, Enterococcaceae, and Enterobacteriaceae. Multiple horses had Salmonella cultured from feces.<br><br>MAIN LIMITATIONS: Limitations including lack of control group and modest sample size are obviated by robust longitudinal study design and strong effect size associated with drug exposure.<br><br>CONCLUSIONS: Clioquinol has broad-spectrum antibacterial effects on the fecal microbiome of horses, but spares certain bacterial families including several pathogens and pathobionts. Clioquinol should be used with caution in horses, in an environment free of contamination with fecal pathogens.}, }
@article {pmid39709449, year = {2024}, author = {Dos Santos, SJ and Copeland, C and Macklaim, JM and Reid, G and Gloor, GB}, title = {Vaginal metatranscriptome meta-analysis reveals functional BV subgroups and novel colonisation strategies.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {271}, pmid = {39709449}, issn = {2049-2618}, support = {20170705//Weston Family Foundation/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology ; *Vaginosis, Bacterial/microbiology ; *Microbiota/genetics ; *Transcriptome ; *Bacteria/genetics/classification/isolation &amp; purification ; Biofilms/growth &amp; development ; Metagenomics/methods ; }, abstract = {BACKGROUND: The application of '-omics' technologies to study bacterial vaginosis (BV) has uncovered vast differences in composition and scale between the vaginal microbiomes of healthy and BV patients. Compared to amplicon sequencing and shotgun metagenomic approaches focusing on a single or few species, investigating the transcriptome of the vaginal microbiome at a system-wide level can provide insight into the functions which are actively expressed and differential between states of health and disease.<br><br>RESULTS: We conducted a meta-analysis of vaginal metatranscriptomes from three studies, split into exploratory (n = 42) and validation (n = 297) datasets, accounting for the compositional nature of sequencing data and differences in scale between healthy and BV microbiomes. Conducting differential expression analyses on the exploratory dataset, we identified a multitude of strategies employed by microbes associated with states of health and BV to evade host cationic antimicrobial peptides (CAMPs); putative mechanisms used by BV-associated species to resist and counteract the low vaginal pH; and potential approaches to disrupt vaginal epithelial integrity so as to establish sites for adherence and biofilm formation. Moreover, we identified several distinct functional subgroups within the BV population, distinguished by genes involved in motility, chemotaxis, biofilm formation and co-factor biosynthesis. After defining molecular states of health and BV in the validation dataset using KEGG orthology terms rather than community state types, differential expression analysis confirmed earlier observations regarding CAMP resistance and compromising epithelial barrier integrity in healthy and BV microbiomes and also supported the existence of motile vs. non-motile subgroups in the BV population. These findings were independent of the enzyme classification system used (KEGG or EggNOG).<br><br>CONCLUSIONS: Our findings highlight a need to focus on functional rather than taxonomic differences when considering the role of microbiomes in disease and identify pathways for further research as potential BV treatment targets. Video Abstract.}, }
@article {pmid39708838, year = {2024}, author = {Luo, Q and Zhang, S and Butt, H and Chen, Y and Jiang, H and An, L}, title = {PhyImpute and UniFracImpute: two imputation approaches incorporating phylogeny information for microbial count data.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {1}, pages = {}, pmid = {39708838}, issn = {1477-4054}, support = {R01ES027013//National Institute of Health/ ; ARZT-1361620-H22-149//United States Department of Agriculture/ ; }, mesh = {*Phylogeny ; Algorithms ; Humans ; Computational Biology/methods ; Microbiota/genetics ; }, abstract = {Sequencing-based microbial count data analysis is a challenging task due to the presence of numerous non-biological zeros, which can impede downstream analysis. To tackle this issue, we introduce two novel approaches, PhyImpute and UniFracImpute, which leverage similar microbial samples to identify and impute non-biological zeros in microbial count data. Our proposed methods utilize the probability of non-biological zeros and phylogenetic trees to estimate sample-to-sample similarity, thus addressing this challenge. To evaluate the performance of our proposed methods, we conduct experiments using both simulated and real microbial data. The results demonstrate that PhyImpute and UniFracImpute outperform existing methods in recovering the zeros and empowering downstream analyses such as differential abundance analysis, and disease status classification.}, }
@article {pmid39708826, year = {2025}, author = {Hu, Y and Zhang, ZY and Wang, F and Zhuang, K and Xu, X and Liu, DS and Fan, HZ and Yang, L and Jiang, K and Zhang, DK and Xu, L and Tang, JH and Liu, XM and He, C and Shu, X and Xie, Y and Lau, JYW and Zhu, Y and Du, YQ and Graham, DY and Lu, NH}, title = {Effects of amoxicillin dosage on cure rate, gut microbiota, and antibiotic resistome in vonoprazan and amoxicillin dual therapy for Helicobacter pylori: a multicentre, open-label, non-inferiority randomised controlled trial.}, journal = {The Lancet. Microbe}, volume = {6}, number = {3}, pages = {100975}, doi = {10.1016/j.lanmic.2024.100975}, pmid = {39708826}, issn = {2666-5247}, mesh = {Humans ; *Amoxicillin/administration &amp; dosage/therapeutic use ; *Helicobacter Infections/drug therapy/microbiology ; Male ; Middle Aged ; Female ; Adult ; *Helicobacter pylori/drug effects ; *Anti-Bacterial Agents/administration &amp; dosage/therapeutic use ; *Pyrroles/administration &amp; dosage/therapeutic use ; *Gastrointestinal Microbiome/drug effects ; Aged ; Drug Therapy, Combination ; *Sulfonamides/administration &amp; dosage/therapeutic use ; Young Adult ; Adolescent ; Treatment Outcome ; China ; Proton Pump Inhibitors/administration &amp; dosage ; Drug Resistance, Bacterial ; Feces/microbiology ; }, abstract = {BACKGROUND: Vonoprazan and amoxicillin (VA) dual therapy as a mainstream Helicobacter pylori regimen has gained momentum worldwide, but the optimum dosages remain unclear. We aimed to compare the efficacy and safety of VA dual therapy with 2 g amoxicillin or 3 g amoxicillin, and to assess the short-term effects of therapy on the gut microbiota and antibiotic resistome.<br><br>METHODS: We conducted an open-label, non-inferiority randomised controlled trial at 12&#xa0;centres in China. Individuals infected with H&#xa0;pylori, aged 18-70&#xa0;years, and without previous eradication therapy were recruited. Participants were randomly assigned at a 1:1 ratio (block size of six) to receive vonoprazan (20 mg twice a day) with either low-dose amoxicillin (1 g twice a day; LVA therapy) or high-dose amoxicillin (1 g three times a day; HVA therapy) for 14&#xa0;days. Gastric biopsies were collected before treatment for detection of antibiotic resistance. Stool samples were collected at baseline, week 2, and week 8-10&#xa0;for shotgun metagenomic sequencing. The primary outcome was the eradication rate of H&#xa0;pylori, assessed by [13]C urea breath test, in both intention-to-treat and per-protocol analyses. Secondary outcomes were adverse events, adherence, antibiotic resistance, and alterations to the gut microbiota and antibiotic resistome. The margin used to establish non-inferiority was -0&#xb7;10. The trial was registered with ClinicalTrials.gov, NCT05649709.<br><br>FINDINGS: Between Feb 13, 2023, and Jan 25, 2024, 504&#xa0;patients (204 [40%] male and 300 [60%] female; mean age 43&#xa0;years [SD 13]) were randomly assigned to LVA therapy or HVA therapy (n=252&#xa0;in each group). No infections were resistant to amoxicillin. The H&#xa0;pylori eradication rate was 85&#xb7;3% (215 of 252; 95% CI 80&#xb7;4&#xa0;to 89&#xb7;2) in the LVA group and 86&#xb7;5% (218 of 252; 81&#xb7;7&#xa0;to 90&#xb7;2) in the HVA group in the intention-to-treat analysis (p=0&#xb7;70) and 88&#xb7;8% (213&#xa0;of&#xa0;240; 84&#xb7;1&#xa0;to 92&#xb7;2) and 92&#xb7;4% (218 of 236; 88&#xb7;3&#xa0;to 95&#xb7;1), respectively, in the per-protocol analysis (p=0&#xb7;18). The&#xa0;efficacy of LVA was non-inferior to HVA in the intention-to-treat analysis (risk difference -1&#xb7;2%, 95% CI -7&#xb7;3 to&#xa0;4&#xb7;9, p=0&#xb7;0022) and the per-protocol analysis (-3&#xb7;6%, -9&#xb7;0&#xa0;to 1&#xb7;7, p=0&#xb7;0085). 31 (12%) patients in the LVA group and&#xa0;43 (17%) patients in the HVA group reported adverse events. Adherence to therapy was 97% in the LVA group and 96% in the HVA group. The diversity of gut microbiota decreased after treatment but was restored to baseline at week 8-10&#xa0;in both groups. The abundance of beta-lactam-related resistance genes was increased at week 2&#xa0;after treatment, and was restored to pretreatment level at week 8-10&#xa0;for the LVA group but not the HVA group.<br><br>INTERPRETATION: LVA dual therapy was effective and non-inferior to HVA dual therapy as first-line treatment of H&#xa0;pylori infection and showed a non-lasting effect on the abundance of beta-lactam-related resistance genes. High amoxicillin dosage (eg, 3&#xa0;g per day) is not required to achieve high cure rates with vonoprazan dual therapy.<br><br>FUNDING: National Natural Science Foundation of China, Project for Academic and Technical Leaders of Major Disciplines in Jiangxi Province, and Key Research and Development Program of Jiangxi Province.}, }
@article {pmid39708450, year = {2025}, author = {Gao, B and Chen, L and Wu, L and Zhang, S and Zhao, S and Mo, Z and Chen, Z and Tu, P}, title = {Association between microplastics and the functionalities of human gut microbiome.}, journal = {Ecotoxicology and environmental safety}, volume = {290}, number = {}, pages = {117497}, doi = {10.1016/j.ecoenv.2024.117497}, pmid = {39708450}, issn = {1090-2414}, mesh = {*Microplastics/toxicity ; *Gastrointestinal Microbiome/drug effects ; Humans ; Animals ; Mice ; Adult ; Feces/microbiology ; Male ; Female ; Bacteria/genetics/drug effects ; }, abstract = {As an integral part of humans, the gut microbiome plays a significant role in the physiological and pathological processes of the host, and dysbiosis of the gut microbiome is linked to various diseases. The impact of microplastics on the diversity and composition of human gut microbiome has been reported previously. However, effects of microplastics on the functionality of the gut microbiome in humans have not been well studied. In the present study, concentrations of microplastics in human blood were detected through pyrolysis-gas chromatography/mass spectrometry in 39 adults. Five types of microplastics were found in human blood, including polyvinyl chloride, polyethylene, polypropylene, polystyrene, and polyamide 66. Shotgun metagenomic sequencing was further employed to analyze the metagenomes of the human stool samples and fecal samples from mice exposed to microplastics. Associations were found between microplastics and microbial species, as well as microbial genes encoding invasion-related virulence factors, quorum sensing, autoinducer and transporter system, and microplastic biodegradation enzymes. The findings are of significance to improve the understanding of functional changes in the gut microbiome associated with microplastic exposure, as well as raising awareness regarding the health risks of microplastics in the human population.}, }
@article {pmid39707929, year = {2024}, author = {Shahzaib, M and Muaz, M and Zubair, MH and Kayani, MUR}, title = {MiCK: a database of gut microbial genes linked with chemoresistance in cancer patients.}, journal = {Database : the journal of biological databases and curation}, volume = {2024}, number = {}, pages = {}, pmid = {39707929}, issn = {1758-0463}, support = {402305//Graduate Research Support Fund to M.S./ ; }, mesh = {Humans ; *Neoplasms/genetics/drug therapy ; *Gastrointestinal Microbiome/genetics ; *Drug Resistance, Neoplasm/genetics ; *Databases, Genetic ; }, abstract = {Cancer remains a global health challenge, with significant morbidity and mortality rates. In 2020, cancer caused nearly 10 million deaths, making it the second leading cause of death worldwide. The emergence of chemoresistance has become a major hurdle in successfully treating cancer patients. Recently, human gut microbes have been recognized for their role in modulating drug efficacy through their metabolites, ultimately leading to chemoresistance. The currently available databases are limited to knowledge regarding the interactions between gut microbiome and drugs. However, a database containing the human gut microbial gene sequences, and their effect on the efficacy of chemotherapy for cancer patients has not yet been developed. To address this challenge, we present the Microbial Chemoresistance Knowledgebase (MiCK), a comprehensive database that catalogs microbial gene sequences associated with chemoresistance. MiCK contains 1.6 million sequences of 29 gene types linked to chemoresistance and drug metabolism, curated manually from recent literature and sequence databases. The database can support downstream analysis as it provides a user-friendly web interface for sequence search and download functionalities. MiCK aims to facilitate the understanding and mitigation of chemoresistance in cancers by serving as a valuable resource for researchers. Database URL: https://microbialchemreskb.com/.}, }
@article {pmid39707568, year = {2024}, author = {Yang, X and Yuan, R and Yang, S and Dai, Z and Di, N and Yang, H and He, Z and Wei, M}, title = {A salt-tolerant growth-promoting phyllosphere microbial combination from mangrove plants and its mechanism for promoting salt tolerance in rice.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {270}, pmid = {39707568}, issn = {2049-2618}, mesh = {*Oryza/microbiology/growth &amp; development ; *Salt Tolerance ; *Plant Leaves/microbiology ; Microbiota ; Rhizosphere ; Pantoea/genetics ; Soil Microbiology ; Bacillus/genetics/isolation &amp; purification/physiology ; Bacteria/genetics/classification/isolation &amp; purification ; Wetlands ; Rhizophoraceae/microbiology ; Quorum Sensing ; }, abstract = {BACKGROUND: Mangrove plants growing in the high salt environment of coastal intertidal zones colonize a variety of microorganisms in the phyllosphere, which have potential salt-tolerant and growth-promoting effects. However, the characteristics of microbial communities in the phyllosphere of mangrove species with and without salt glands and the differences between them remain unknown, and the exploration and the agricultural utilization of functional microbial resources from the leaves of mangrove plants are insufficient.<br><br>RESULTS: In this study, we examined six typical mangrove species to unravel the differences in the diversity and structure of phyllosphere microbial communities between mangrove species with or without salt glands. Our results showed that a combination of salt-tolerant growth-promoting strains of Pantoea stewartii A and Bacillus marisflavi Y25 (A&#x2009;+&#x2009;Y25) was constructed from the phyllosphere of mangrove plants, which demonstrated an ability to modulate osmotic substances in rice and regulate the expression of salt-resistance-associated genes. Further metagenomic analysis revealed that exogenous inoculation with A&#x2009;+&#x2009;Y25 increased the rice rhizosphere's specific microbial taxon Chloroflexi, thereby elevating microbial community quorum sensing and ultimately enhancing ionic balance and overall microbial community function to aid salt resistance in rice.<br><br>CONCLUSIONS: This study advances our understanding of the mutualistic and symbiotic relationships between mangrove species and their phyllosphere microbial communities. It offers a paradigm for exploring agricultural beneficial microbial resources from mangrove leaves and providing the potential for applying the salt-tolerant bacterial consortium to enhance crop adaptability in saline-alkaline land. Video Abstract.}, }
@article {pmid39707567, year = {2024}, author = {Feng, X and Xing, P and Tao, Y and Wang, X and Wu, QL and Liu, Y and Luo, H}, title = {Functional traits and adaptation of lake microbiomes on the Tibetan Plateau.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {264}, pmid = {39707567}, issn = {2049-2618}, support = {2023A1515012162//Basic and Applied Basic Research Foundation of Guangdong Province/ ; 2022M712195//the China Postdoctoral Science Foundation/ ; 2019QZKK0503//the Second Tibetan Plateau Scientific Expedition and Research Program/ ; 2019QZKK0503//the Second Tibetan Plateau Scientific Expedition and Research Program/ ; 2019QZKK0503//the Second Tibetan Plateau Scientific Expedition and Research Program/ ; U2102216//the National Natural Science Foundation of China/ ; 92251304//the National Natural Science Foundation of China/ ; 92251304//the National Natural Science Foundation of China/ ; AoE/M-403/16//the Hong Kong Research Grants Council Area of Excellence Scheme/ ; }, mesh = {*Lakes/microbiology ; Tibet ; *Microbiota/genetics ; *Phylogeny ; *Bacteria/classification/genetics ; Metagenome ; Salinity ; Climate Change ; Ecosystem ; Adaptation, Physiological ; }, abstract = {BACKGROUND: Tibetan Plateau is credited as the "Third Pole" after the Arctic and the Antarctic, and lakes there represent a pristine habitat ideal for studying microbial processes under climate change.<br><br>RESULTS: Here, we collected 169 samples from 54 lakes including those from the central Tibetan region that was underrepresented previously, grouped them to freshwater, brackish, and saline lakes, and generated a genome atlas of the Tibetan Plateau Lake Microbiome. This genomic atlas comprises 8271 metagenome-assembled genomes featured by having significant phylogenetic and functional novelty. The microbiomes of freshwater lakes are enriched with genes involved in recalcitrant carbon degradation, carbon fixation, and energy transformation, whereas those of saline lakes possess more genes that encode osmolyte transport and synthesis and enable anaerobic metabolism. These distinct metabolic features match well with the geochemical properties including dissolved organic carbon, dissolved oxygen, and salinity that distinguish between these lakes. Population genomic analysis suggests that microbial populations in saline lakes are under stronger functional constraints than those in freshwater lakes. Although microbiomes in the Tibet lakes, particularly the saline lakes, may be subject to changing selective regimes due to ongoing warming, they may also benefit from the drainage reorganization and metapopulation reconnection.<br><br>CONCLUSIONS: Altogether, the Tibetan Plateau Lake Microbiome atlas serves as a valuable microbial genetic resource for biodiversity conservation and climate research. Video Abstract.}, }
@article {pmid39707560, year = {2024}, author = {Wang, H and Sun, C and Li, Y and Chen, J and Zhao, XM and Chen, WH}, title = {Complementary insights into gut viral genomes: a comparative benchmark of short- and long-read metagenomes using diverse assemblers and binners.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {260}, pmid = {39707560}, issn = {2049-2618}, support = {T2225015//National Natural Science Foundation of China/ ; 32070660//National Natural Science Foundation of China/ ; 2020YFA0712403//National Key Research and Development Program of China/ ; 2019YFA0905600//National Key Research and Development Program of China/ ; 82161138017//NNSF-VR Sino-Swedish Joint Research Programme/ ; }, mesh = {*Genome, Viral/genetics ; Humans ; *High-Throughput Nucleotide Sequencing/methods ; *Gastrointestinal Microbiome/genetics ; *Metagenome/genetics ; *Feces/virology ; Metagenomics/methods ; Virome/genetics ; Viruses/genetics/classification ; Benchmarking ; Sequence Analysis, DNA/methods ; }, abstract = {BACKGROUND: Metagenome-assembled viral genomes have significantly advanced the discovery and characterization of the human gut virome. However, we lack a comparative assessment of assembly tools on the efficacy of viral genome identification, particularly across next-generation sequencing (NGS) and third-generation sequencing (TGS) data.<br><br>RESULTS: We evaluated the efficiency of NGS, TGS, and hybrid assemblers for viral genome discovery using 95 viral-like particle (VLP)-enriched fecal samples sequenced on both Illumina and PacBio platforms. MEGAHIT, metaFlye, and hybridSPAdes emerged as the optimal choices for NGS, TGS, and hybrid datasets, respectively. Notably, these assemblers recovered distinct viral genomes, demonstrating a remarkable degree of complementarity. By combining individual assembler results, we expanded the total number of nonredundant high-quality viral genomes by 4.83&#x2009;~&#x2009;21.7-fold compared to individual assemblers. Among them, viral genomes from NGS and TGS data have the least overlap, indicating the impact of data type on viral genome recovery. We also evaluated four binning methods, finding that CONCOCT incorporated more unrelated contigs into the same bins, while MetaBAT2, AVAMB, and vRhyme balanced inclusiveness and taxonomic consistency within bins.<br><br>CONCLUSIONS: Our findings highlight the challenges in metagenome-driven viral discovery, underscoring tool limitations. We advocate for combined use of multiple assemblers and sequencing technologies when feasible and highlight the urgent need for specialized tools tailored to gut virome assembly. This study contributes essential insights for advancing viral genome research in the context of gut metagenomics. Video Abstract.}, }
@article {pmid39707557, year = {2024}, author = {Santamarina-García, G and Yap, M and Crispie, F and Amores, G and Lordan, C and Virto, M and Cotter, PD}, title = {Shotgun metagenomic sequencing reveals the influence of artisanal dairy environments on the microbiomes, quality, and safety of Idiazabal, a raw ewe milk PDO cheese.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {262}, pmid = {39707557}, issn = {2049-2618}, support = {IT1568-22//Eusko Jaurlaritza/ ; IT1568-22//Eusko Jaurlaritza/ ; IT1568-22//Eusko Jaurlaritza/ ; PIF19/31//Euskal Herriko Unibertsitatea/ ; }, mesh = {*Cheese/microbiology ; Animals ; *Milk/microbiology ; *Microbiota ; *Metagenomics ; Sheep/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Female ; Dairying ; Food Microbiology ; Metagenome ; }, abstract = {BACKGROUND: Numerous studies have highlighted the impact of bacterial communities on the quality and safety of raw ewe milk-derived cheeses. Despite reported differences in the microbiota among cheese types and even producers, to the best of our knowledge, no study has comprehensively assessed all potential microbial sources and their contributions to any raw ewe milk-derived cheese, which could suppose great potential for benefits from research in this area. Here, using the Protected Designation of Origin Idiazabal cheese as an example, the impact of the environment and practices of artisanal dairies (including herd feed, teat skin, dairy surfaces, and ingredients) on the microbiomes of the associated raw milk, whey, and derived cheeses was examined through shotgun metagenomic sequencing.<br><br>RESULTS: The results revealed diverse microbial ecosystems across sample types, comprising more than 1300 bacterial genera and 3400 species. SourceTracker analysis revealed commercial feed and teat skin as major contributors to the raw milk microbiota (45.6% and 33.5%, respectively), being a source of, for example, Lactococcus and Pantoea, along with rennet contributing to the composition of whey and cheese (17.4% and 41.0%, respectively), including taxa such as Streptococcus, Pseudomonas_E or Lactobacillus_H. Functional analysis linked microbial niches to cheese quality- and safety-related metabolic pathways, with brine and food contact surfaces being most relevant, related to genera like Brevibacterium, Methylobacterium, or Halomonas. With respect to the virulome (virulence-associated gene profile), in addition to whey and cheese, commercial feed and grass were the main reservoirs (related to, e.g., Brevibacillus_B or CAG-196). Similarly, grass, teat skin, or rennet were the main contributors of antimicrobial resistance genes (e.g., Bact-11 or Bacteriodes_B). In terms of cheese aroma and texture, apart from the microbiome of the cheese itself, brine, grass, and food contact surfaces were key reservoirs for hydrolase-encoding genes, originating from, for example, Lactococcus, Lactobacillus, Listeria or Chromohalobacter. Furthermore, over 300 metagenomic assembled genomes (MAGs) were generated, including 60 high-quality MAGs, yielding 28 novel putative species from several genera, e.g., Citricoccus, Corynebacterium, or Dietzia.<br><br>CONCLUSION: This study emphasizes the role of the artisanal dairy environments in determining cheese microbiota and, consequently, quality and safety. Video Abstract.}, }
@article {pmid39707494, year = {2024}, author = {Li, C and Liu, K and Gu, C and Li, M and Zhou, P and Chen, L and Sun, S and Li, X and Wang, L and Ni, W and Li, M and Hu, S}, title = {Gastrointestinal jumbo phages possess independent synthesis and utilization systems of NAD.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {268}, pmid = {39707494}, issn = {2049-2618}, mesh = {*Bacteriophages/genetics/classification/isolation &amp; purification ; Animals ; *Genome, Viral/genetics ; *NAD/metabolism ; *Phylogeny ; Humans ; Gastrointestinal Microbiome ; Swine ; Sheep ; Metagenomics ; Horses ; Cattle ; Bacteria/virology/genetics ; Deer/virology ; DNA Replication ; }, abstract = {BACKGROUND: Jumbo phages, phages with genomes > 200 kbp, contain some unique genes for successful reproduction in their bacterial hosts. Due to complex and massive genomes analogous to those of small-celled bacteria, how jumbo phages complete their life cycle remains largely undefined.<br><br>RESULTS: In this study, we assembled 668 high-quality jumbo phage genomes from over 15 terabytes (TB) of intestinal metagenomic data from 955 samples of 5 animal species (cow, sheep, pig, horse, and deer). Within them, we obtained a complete genome of 716 kbp in length, which is the largest phage genome so far reported in the gut environments. Interestingly, 174 out of the 668 jumbo phages were found to encode all genes required for the synthesis of NAD[+] by the salvage pathway or Preiss-Handler pathway, referred to as NAD-jumbo phage. Besides synthesis genes of NAD[+], these NAD-jumbo phages also encode at least 15 types of NAD[+]-consuming enzyme genes involved in DNA replication, DNA repair, and counterdefense, suggesting that these phages not only have the capacity to synthesize NAD[+] but also redirect NAD[+] metabolism towards phage propagation need in hosts. Phylogenetic analysis and environmental survey indicated NAD-jumbo phages are widely present in the Earth's ecosystems, including the human gut, lakes, salt ponds, mine tailings, and seawater.<br><br>CONCLUSION: In summary, this study expands our understanding of the diversity and survival strategies of phages, and an in-depth study of the NAD-jumbo phages is crucial for understanding their role in ecological regulation. Video Abstract.}, }
@article {pmid39707478, year = {2024}, author = {He, Z and Hou, Y and Li, Y and Bei, Q and Li, X and Zhu, YG and Liesack, W and Rillig, MC and Peng, J}, title = {Increased methane production associated with community shifts towards Methanocella in paddy soils with the presence of nanoplastics.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {259}, pmid = {39707478}, issn = {2049-2618}, mesh = {*Methane/metabolism ; *Soil Microbiology ; *Soil/chemistry ; *Oryza/microbiology ; Microbiota ; Polyethylene ; Soil Pollutants ; Metagenomics ; Archaea/metabolism/genetics/classification ; Carbon/metabolism ; Plastics ; }, abstract = {BACKGROUND: Planetary plastic pollution poses a major threat to ecosystems and human health in the Anthropocene, yet its impact on biogeochemical cycling remains poorly understood. Waterlogged rice paddies are globally important sources of CH4. Given the widespread use of plastic mulching in soils, it is urgent to unravel whether low-density polyethylene (LDPE) will affect the methanogenic community in flooded paddy soils. Here, we employed a combination of process measurements, short-chain and long-chain fatty acid (SCFAs and LCFAs) profiling, Fourier-transform ion cyclotron resonance mass spectrometry, quantitative PCR, metagenomics, and mRNA profiling to investigate the impact of LDPE nanoplastics (NPs) on dissolved organic carbon (DOC) and CH4 production in both black and red paddy soils under anoxic incubation over a 160-day period.<br><br>RESULTS: Despite significant&#xa0;differences in microbiome composition&#xa0;between the two soil types, both exhibited&#xa0;similar results&#xa0;to NPs exposure. NPs induced a change in DOC content&#xa0;and CH4 production up to 1.8-fold and 10.1-fold, respectively. The proportion of labile dissolved organic matter decreased, while its recalcitrance increased. Genes associated with the degradation of complex carbohydrates and aromatic carbon were significantly enriched. The elevated CH4 production was significantly correlated to increases in both the PCR-quantified mcrA gene copy numbers and the metagenomic methanogen-to-bacteria abundance ratio. Notably,&#xa0;the latter was&#xa0;linked to an enrichment of the hydrogenotrophic methanogenesis pathway. Among 391 metagenome-assembled genomes (MAGs), the abundance of several Syntrophomonas and Methanocella MAGs increased concomitantly, suggesting that the NPs treatments stimulated the syntrophic oxidation of fatty acids. mRNA profiling further identified Methanosarcinaceae and Methanocellaceae to be the key players in the NPs-induced CH4 production.<br><br>CONCLUSIONS: The specific enrichment of Syntrophomonas and Methanocella indicates that LDPE NPs stimulate the syntrophic oxidation of LCFAs and SCFAs, with Methanocella acting&#xa0;as the hydrogenotrophic methanogen partner. Our findings enhance the&#xa0;understanding of how LDPE NPs affect the methanogenic community in waterlogged paddy soils.&#xa0;Given the importance of this ecosystem, our results&#xa0;are crucial for elucidating the mechanisms that govern carbon fluxes, which are highly relevant to global climate change.}, }
@article {pmid39706917, year = {2024}, author = {Chang, WS and Harvey, E and Mahar, JE and Firth, C and Shi, M and Simon-Loriere, E and Geoghegan, JL and Wille, M}, title = {Improving the reporting of metagenomic virome-scale data.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1687}, pmid = {39706917}, issn = {2399-3642}, mesh = {Animals ; Humans ; Genome, Viral ; Metagenome ; *Metagenomics/methods ; *Virome/genetics ; *Viruses/genetics/classification ; }, abstract = {Over the last decade metagenomic sequencing has facilitated an increasing number of virome-scale studies, leading to an exponential expansion in understanding of virus diversity. This is partially driven by the decreasing costs of metagenomic sequencing, improvements in computational tools for revealing novel viruses, and an increased understanding of the key role that viruses play in human and animal health. A central concern associated with this remarkable increase in the number of virome-scale studies is the lack of broadly accepted "gold standards" for reporting the data and results generated. This is of particular importance for animal virome studies as there are a multitude of nuanced approaches for both data presentation and analysis, all of which impact the resulting outcomes. As such, the results of published studies can be difficult to contextualise and may be of reduced utility due to reporting deficiencies. Herein, we aim to address these reporting issues by outlining recommendations for the presentation of virome data, encouraging a transparent communication of findings that can be interpreted in evolutionary and ecological contexts.}, }
@article {pmid39705954, year = {2025}, author = {Basile, A and Riggio, FP and Tescari, M and Chebbi, A and Sodo, A and Bartoli, F and Imperi, F and Caneva, G and Visca, P}, title = {Metagenome-resolved functional traits of Rubrobacter species implicated in rosy discoloration of ancient frescoes in two Georgian Cathedrals.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {178135}, doi = {10.1016/j.scitotenv.2024.178135}, pmid = {39705954}, issn = {1879-1026}, mesh = {*Metagenome ; Phylogeny ; RNA, Ribosomal, 16S ; Biofilms ; }, abstract = {Pink biofilm formation on stone monuments and mural paintings poses serious harm to cultural heritage preservation. Pink biofilms are globally widespread and recalcitrant to eradication, often causing recurrences after restoration. Yet, the ecological drivers of pink biofilm formation and the metabolic functions sustaining the growth of pigment-producing biodeteriogens remain unclear. In this study, a combined approach integrating physicochemical investigations, scanning electron microscopy, 16S rRNA sequence-based analysis of the prokaryotic community, metagenomic deep sequencing, and metabolic profiling, was applied to determine the etiology of rosy discoloration of ancient frescoes in the Gelati and the Martvili Cathedrals (Georgia). Martvili samples showed greater diversity than Gelati samples, though Actinomycetota predominated in both samples. Rubrobacter-related sequences were detected in all sampling sites, showing an overwhelming abundance in Gelati samples. Reconstruction of metagenome-assembled genomes (MAGs) and phylogenetic analyses highlighted significant intra-genus diversity for Rubrobacter-related sequences, most of which could not be assigned to any formally described Rubrobacter species. Metabolic profiling of the Gelati metagenomes suggests that carbon-fixing autotrophic bacteria and proteinaceous substances in the plaster could contribute to sustaining the chemoorganotrophic members of the community. Complete pathways for β-carotene and bacterioruberin synthesis were identified in Rubrobacter MAGs, consistent with the Raman spectroscopy-based detection of these pigments in fresco samples. Gene clusters for the synthesis of secondary metabolites endowed with antibiotic activity were predicted from the annotation of Rubrobacter MAGs, along with genes conferring resistance to several antimicrobials and biocides. In conclusion, genome-resolved metagenomics provided robust evidence of a causal relationship between contamination by Rubrobacter-related carotenoid-producing bacteria and the rosy discoloration of Georgian frescoes, with relevant implications for rational biodeteriogen-targeted restoration strategies.}, }
@article {pmid39705480, year = {2024}, author = {Lu, S and Sun, L and Cao, L and Zhao, M and Guo, Y and Li, M and Duan, S and Zhai, Y and Zhang, X and Wang, Y and Gai, W and Cui, X}, title = {Analysis of lung microbiota in pediatric pneumonia patients using BALF metagenomic next-generation sequencing: A retrospective observational study.}, journal = {Medicine}, volume = {103}, number = {51}, pages = {e40860}, pmid = {39705480}, issn = {1536-5964}, support = {202139//Clinical Medical peronnel training programs/ ; }, mesh = {Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; *Bronchoalveolar Lavage Fluid/microbiology ; *High-Throughput Nucleotide Sequencing/methods ; *Lung/microbiology ; *Metagenomics/methods ; *Microbiota/genetics ; *Pneumonia/genetics/microbiology ; Pneumonia, Mycoplasma/microbiology/diagnosis ; Retrospective Studies ; Severity of Illness Index ; }, abstract = {The contribution of the lung microbiota to pneumonia in children of varying severity remains poorly understood. This study utilized metagenomic next-generation sequencing (mNGS) technology to elucidate the characteristics of lung microbiota and their association with disease severity. This retrospective study analyzed bronchoalveolar lavage fluid (BALF) mNGS data of 92 children diagnosed with pneumonia between January 2021 and July 2022. A comparative analysis of the lung microbiota was conducted between the severe pneumonia (SP) (n = 44) and non-severe pneumonia (NSP) (n = 48) groups. Compared to conventional microbiological tests (CMT), mNGS had a higher positivity rate in etiology detection (68% vs 100%). In the NSP group, the predominant type of infection was Mycoplasma pneumoniae single infection, whereas in the SP group, the main type involved a combination of M pneumoniae and bacterial infection. The top 3 identified microbial taxa in both the groups were M pneumoniae, Rothia mucilaginosa, and Schaalia odontolyticus. Although there were no significant differences in the α and β diversity of the lung microbiota between the SP and NSP groups, the abundance of M pneumoniae was higher in the SP group (P = .053). Spearman analysis indicated a highly significant positive correlation between the abundance of Prevotella melaninogenica and M pneumoniae (P < .001). Our analysis identified an association between M pneumoniae infections and disease severity. This study provides a foundation for a better understanding of the pathogenesis of pediatric pneumonia and the relationship between microorganisms.}, }
@article {pmid39705298, year = {2024}, author = {Oliveira, V and Cleary, DFR and Polónia, ARM and Huang, YM and Rocha, U and Voogd, NJ and Gomes, NCM}, title = {Unravelling a Latent Pathobiome Across Coral Reef Biotopes.}, journal = {Environmental microbiology}, volume = {26}, number = {12}, pages = {e70008}, doi = {10.1111/1462-2920.70008}, pmid = {39705298}, issn = {1462-2920}, support = {VH-NG-1248 Micro "BigData"//Helmholtz Young Investigator Grant/ ; MNPH 104403//Marine National Parks Headquarter, Taiwan/ ; MOST 105-2621-B-346-002//Ministry of Science and Technology, Taiwan/ ; DOI: 10.54499/DL57/2016/CP1482/CT0109//Foundation for Science and Technology/ ; PTDC/BIA29/MIC/6473/2014 - POCI-01-0145-FEDER-01//Foundation for Science and Technology/ ; SFRH/BPD/117563/2016//Foundation for Science and Technology/ ; UIDP/50017/2020 + UIDB/50017/2020 + LA/P/0094/2020//Foundation for Science and Technology/ ; }, mesh = {*Coral Reefs ; Animals ; *Anthozoa/microbiology ; *Bacteria/genetics/classification ; *Microbiota ; Virulence Factors/genetics ; }, abstract = {Previous studies on disease in coral reef organisms have neglected the natural distribution of potential pathogens and the genetic factors that underlie disease incidence. This study explores the intricate associations between hosts, microbial communities, putative pathogens, antibiotic resistance genes (ARGs) and virulence factors (VFs) across diverse coral reef biotopes. We observed a substantial compositional overlap of putative bacterial pathogens, VFs and ARGs across biotopes, consistent with the 'everything is everywhere, but the environment selects' hypothesis. However, flatworms and soft corals deviated from this pattern, harbouring the least diverse microbial communities and the lowest diversity of putative pathogens and ARGs. Notably, our study revealed a significant congruence between the distribution of putative pathogens, ARGs and microbial assemblages across different biotopes, suggesting an association between pathogen and ARG occurrence. This study sheds light on the existence of this latent pathobiome, the disturbance of which may contribute to disease onset in coral reef organisms.}, }
@article {pmid39702789, year = {2025}, author = {Kaur, S and Patel, BCK and Collen, A and Malhotra, R}, title = {The microbiome and the eye: a new era in ophthalmology.}, journal = {Eye (London, England)}, volume = {39}, number = {3}, pages = {436-448}, pmid = {39702789}, issn = {1476-5454}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Eye Diseases/microbiology/therapy ; *Ophthalmology/trends ; *Eye/microbiology ; *Microbiota/physiology ; Fecal Microbiota Transplantation ; }, abstract = {The human microbiome has progressively been recognised for its role in various disease processes. In ophthalmology, complex interactions between the gut and distinct ocular microbiota within each structure and microenvironment of the eye has advanced our knowledge on the multi-directional relationships of these ecosystems. Increasingly, studies have shown that modulation of the microbiome can be achieved through faecal microbiota transplantation and synbiotics producing favourable outcomes for ophthalmic diseases. As ophthalmologists, we are obliged to educate our patients on measures to cultivate a healthy gut microbiome through a range of holistic measures. Further integrative studies combining microbial metagenomics, metatranscriptomics and metabolomics are necessary to fully characterise the human microbiome and enable targeted therapeutic interventions.}, }
@article {pmid39702650, year = {2024}, author = {Vriend, EMC and Galenkamp, H and Herrema, H and Nieuwdorp, M and van den Born, BH and Verhaar, BJH}, title = {Machine learning analysis of sex and menopausal differences in the gut microbiome in the HELIUS study.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {152}, pmid = {39702650}, issn = {2055-5008}, support = {189235//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; 09150182010020/ZONMW_/ZonMw/Netherlands ; 101141346/ERC_/European Research Council/International ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; Female ; *Machine Learning ; Male ; Middle Aged ; *Menopause ; Aged ; Sex Factors ; Metagenomics/methods ; Adult ; Cohort Studies ; Bacteria/classification/genetics/isolation &amp; purification ; Feces/microbiology ; }, abstract = {Sex differences in the gut microbiome have been examined previously, but results are inconsistent, often due to small sample sizes. We investigated sex and menopausal differences in the gut microbiome in a large multi-ethnic population cohort study, including 5166 participants. Using machine learning models, we revealed modest associations between sex and menopausal status, and gut microbiota composition (AUC 0.61-0.63). After adjustments for age, cardiovascular risk factors, and diet, a part of the associations of the highest-ranked gut microbes with sex were attenuated, but most associations remained significant. In contrast, most associations with menopausal status were driven by age and lost significance after adjustment. Using pathway analyses on metagenomic data, we identified sex differences in vitamin B6 synthesis and stachyose degradation pathways. Since some of sex differences in gut microbiome composition and function could not be explained by covariates, we recommend sex stratification in future microbiome studies.}, }
@article {pmid39702405, year = {2024}, author = {Soufi, HH and Porch, R and Korchagina, MV and Abrams, JA and Schnider, JS and Carr, BD and Williams, MA and Louca, S}, title = {Taxonomic variability and functional stability across Oregon coastal subsurface microbiomes.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1663}, pmid = {39702405}, issn = {2399-3642}, mesh = {Oregon ; *Microbiota/genetics ; *Geologic Sediments/microbiology ; *RNA, Ribosomal, 16S/genetics ; Bacteria/genetics/classification ; Phylogeny ; Metagenomics/methods ; Biodiversity ; }, abstract = {The factors shaping microbial communities in marine subsurface sediments remain poorly understood. Here, we analyzed the microbiome of subsurface sediments within a depth range of 1.6-1.9 m, at 10 locations along the Oregon coast. We used metagenomics to reconstruct the functional structure and 16S rRNA gene amplicon sequencing to estimate the taxonomic composition of microbial communities, accompanied by physicochemical measurements. Functional community structure, in terms of the proportions of various gene groups, was remarkably stable across samples, despite the latter covering a region spanning over 300 km. In contrast, taxonomic composition was highly variable, especially at the level of amplicon sequence variants (ASVs) and operational taxonomic units (OTUs). Mantel correlation tests between compositional dissimilarities and geographic distances revealed only a moderate influence of distance on composition. Regression models predicting taxonomic dissimilarities and considering up to 20 physicochemical variables as predictors, almost always failed to select a significant predictor, suggesting that variation in local conditions does not explain the high taxonomic variability. Permutation null models of community assembly revealed that taxa tend to strongly segregate, i.e., exclude each other. We conclude that biological interactions are important drivers of taxonomic variation in subsurface sediments, and that this variation can decouple from functional structure.}, }
@article {pmid39702006, year = {2024}, author = {Demirkan, A and van Dongen, J and Finnicum, CT and Westra, HJ and Jankipersadsing, S and Willemsen, G and Ijzerman, RG and Boomsma, DI and Ehli, EA and Bonder, MJ and Fu, J and Franke, L and Wijmenga, C and de Geus, EJC and Kurilshikov, A and Zhernakova, A}, title = {Linking the gut microbiome to host DNA methylation by a discovery and replication epigenome-wide association study.}, journal = {BMC genomics}, volume = {25}, number = {1}, pages = {1224}, pmid = {39702006}, issn = {1471-2164}, mesh = {*DNA Methylation ; *Gastrointestinal Microbiome/genetics ; Humans ; *Epigenome ; *Genome-Wide Association Study ; Male ; Female ; RNA, Ribosomal, 16S/genetics ; CpG Islands/genetics ; Middle Aged ; Adult ; Netherlands ; }, abstract = {Microbiome influences multiple human systems, but its effects on gene methylation is unknown. We investigated the relations between gene methylation in blood and the abundance of common gut bacteria profiled by 16s rRNA gene sequencing in two population-based Dutch cohorts: LifeLines-Deep (LLD, n = 616, discovery) and the Netherlands Twin Register (NTR, n = 296, replication). In LLD, we also explored microbial pathways using data generated by shotgun metagenomic sequencing (n = 683). Methylation in both cohorts was profiled in blood samples using the Illumina 450K array. Discovery and replication analysis identified two independent CpGs associated with the genus Eggerthella: cg16586104 (Pmeta-analysis = 3.21 × 10[-11]) and cg12234533 (Pmeta-analysis = 4.29 × 10[-10]). We also show that microbiome can mediate the effect of environmental factors on host gene methylation. In this first association study linking epigenome to microbiome, we found and replicated the associations of two CpGs to the abundance of genus Eggerthella and identified microbiome as a mediator of the exposome. These associations are observational and suggest further investigation in larger and longitudinal set-ups.}, }
@article {pmid39701966, year = {2024}, author = {Oskolkov, N and Sandionigi, A and Götherström, A and Canini, F and Turchetti, B and Zucconi, L and Mimmo, T and Buzzini, P and Borruso, L}, title = {Unraveling the ancient fungal DNA from the Iceman gut.}, journal = {BMC genomics}, volume = {25}, number = {1}, pages = {1225}, pmid = {39701966}, issn = {1471-2164}, mesh = {*DNA, Ancient/analysis ; Humans ; *DNA, Fungal/genetics ; Metagenomics/methods ; Gastrointestinal Microbiome/genetics ; Gastrointestinal Tract/microbiology ; Mummies/microbiology ; Computational Biology/methods ; Fungi/genetics/classification ; }, abstract = {BACKGROUND: Fungal DNA is rarely reported in metagenomic studies of ancient samples. Although fungi are essential for their interactions with all kingdoms of life, limited information is available about ancient fungi. Here, we explore the possibility of the presence of ancient fungal species in the gut of Ötzi, the Iceman, a naturally mummified human found in the Tyrolean Alps (border between Italy and Austria).<br><br>METHODS: A robust bioinformatic pipeline has been developed to detect and authenticate fungal ancient DNA (aDNA) from muscle, stomach, small intestine, and large intestine samples.<br><br>RESULTS: We revealed the presence of ancient DNA associated with Pseudogymnoascus genus, with P. destructans and P. verrucosus as possible species, which were abundant in the stomach and small intestine and absent in the large intestine and muscle samples.<br><br>CONCLUSION: We suggest that &#xd6;tzi may have consumed these fungi accidentally, likely in association with other elements of his diet, and they persisted in his gut after his death due to their adaptability to harsh and cold environments. This suggests the potential co-occurrence of ancient humans with opportunistic fungal species and proposes and validates a conservative bioinformatic approach for detecting and authenticating fungal aDNA in historical metagenomic samples.}, }
@article {pmid39701829, year = {2025}, author = {McAlister, JS and Blum, MJ and Bromberg, Y and Fefferman, NH and He, Q and Lofgren, E and Miller, DL and Schreiner, C and Candan, KS and Szabo-Rogers, H and Reed, JM}, title = {An interdisciplinary perspective of the built-environment microbiome.}, journal = {FEMS microbiology ecology}, volume = {101}, number = {1}, pages = {}, pmid = {39701829}, issn = {1574-6941}, support = {CCF 2200140//U.S. National Science Foundation/ ; }, mesh = {*Microbiota ; *Built Environment ; Humans ; Interdisciplinary Research ; }, abstract = {The built environment provides an excellent setting for interdisciplinary research on the dynamics of microbial communities. The system is simplified compared to many natural settings, and to some extent the entire environment can be manipulated, from architectural design to materials use, air flow, human traffic, and capacity to disrupt microbial communities through cleaning. Here, we provide an overview of the ecology of the microbiome in the built environment. We address niche space and refugia, population, and community (metagenomic) dynamics, spatial ecology within a building, including the major microbial transmission mechanisms, as well as evolution. We also address landscape ecology, connecting microbiomes between physically separated buildings. At each stage, we pay particular attention to the actual and potential interface between disciplines, such as ecology, epidemiology, materials science, and human social behavior. We end by identifying some opportunities for future interdisciplinary research on the microbiome of the built environment.}, }
@article {pmid39701698, year = {2024}, author = {Bao, YY and Li, MX and Gao, XX and Wei, WJ and Huang, WJ and Lin, LZ and Wang, H and Zheng, NN and Li, HK}, title = {[Astragalus polysaccharides improve adipose tissue aging in naturally aged mice via indole-3-lactic acid].}, journal = {Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica}, volume = {49}, number = {22}, pages = {5998-6007}, doi = {10.19540/j.cnki.cjcmm.20240508.401}, pmid = {39701698}, issn = {1001-5302}, mesh = {Animals ; Mice ; *Aging/drug effects ; *Adipose Tissue/drug effects/metabolism ; *Polysaccharides/pharmacology ; *Indoles/pharmacology ; Male ; *Astragalus Plant/chemistry ; 3T3-L1 Cells ; Humans ; Adipocytes/drug effects/metabolism/cytology ; Mice, Inbred C57BL ; Cellular Senescence/drug effects ; Drugs, Chinese Herbal/pharmacology/administration &amp; dosage ; Gastrointestinal Microbiome/drug effects ; }, abstract = {Plant polysaccharides are effective components that widely present in traditional Chinese medicine(TCM), exhibiting rich biological activities. However, as most plant polysaccharides cannot be directly absorbed and utilized by the human digestive system, it is now believed that their mode of action mainly involves interaction with intestinal microbiota, leading to the production of functional small molecules. The efficacy of Astragalus polysaccharide(APS) is extensive, including weight loss, improvement of fatty liver, reduction of blood lipids, and enhancement of insulin sensitivity, which may also be related to the regulation of intestinal microbiota. Adipose tissue senescence is an important characteristic of the physiological aging process in the body, often occurring prior to the aging of other important organs. Its main features include the accumulation of senescent cells and exacerbation of inflammation within the tissue. Therefore, to explore the potential protective effects of APS on aging, the improvement of adipose tissue aging phenotype in naturally aging mice was observed using APS, and combined with metagenomic metabolomics, corresponding microbial metabolic functional molecules were identified. Furthermore, functional tests in cell aging models were conducted. The results showed that APS significantly improved the adipocyte aging characteristics of naturally aging mice: specifically reducing aging-induced adipocyte hypertrophy; decreasing the protein expression of aging markers cyclin-dependent kinase inhibitor p21(P21) and multiple tumor suppressor 1(P16); lowering the tissue inflammation reaction. Metagenomic metabolomic analysis of serum from mice in each group revealed that APS significantly increased the content of indole-3-lactic acid(ILA) in naturally aging mice. Further in vitro studies showed that ILA could improve the aging of 3T3-L1 mouse embryonic fibroblasts induced by bleomycin, reduce the protein expression of the aging marker P21, alleviate inflammation, and enhance the ability of preadipocytes to mature. Therefore, APS had the efficacy of protecting naturally aging mice, and its action may be related to the increase in the intestinal microbiota metabolite ILA. This study suggested that TCM may serve as an important entry point for explaining the mechanism of action of TCM by regulating intestinal microbiota and their functional metabolites.}, }
@article {pmid39701375, year = {2025}, author = {Corbett, GA and Corcoran, S and Feehily, C and Soldati, B and Rafferty, A and MacIntyre, DA and Cotter, PD and McAuliffe, FM}, title = {Preterm-birth-prevention with Lactobacillus crispatus oral probiotics: Protocol for a double blinded randomised placebo-controlled trial (the PrePOP study).}, journal = {Contemporary clinical trials}, volume = {149}, number = {}, pages = {107776}, doi = {10.1016/j.cct.2024.107776}, pmid = {39701375}, issn = {1559-2030}, mesh = {Adult ; Female ; Humans ; Pregnancy ; Administration, Oral ; Double-Blind Method ; Gastrointestinal Microbiome ; Ireland ; Lacticaseibacillus rhamnosus ; *Lactobacillus crispatus ; *Premature Birth/prevention &amp; control ; *Probiotics/therapeutic use/administration &amp; dosage ; Randomized Controlled Trials as Topic ; *Vagina/microbiology ; }, abstract = {INTRODUCTION: Effective spontaneous preterm birth (sPTB) prevention is an urgent unmet clinical need. Vaginal depletion of Lactobacillus crispatus is linked to sPTB. This trial will investigate impact of an oral Lactobacillus spp. probiotic product containing an L. crispatus strain with other Lactobacilli spp., on the maternal vaginal and gut microbiome in pregnancies high-risk for sPTB.<br><br>METHODS: A double-blind, placebo-controlled, randomised trial will be performed at the National Maternity Hospital Dublin, Ireland. Inclusion criteria are women with history of sPTB or mid-trimester loss, cervical surgery (cone biopsy or two previous large-loop-excision-of-transformation-zone) or uterine anomaly. The intervention is oral supplementation for twelve weeks with probiotic or identical placebo. The probiotic will contains: &#x25e6; 4 billion CFU Lactobacillus crispatus Lbv 88(2x10[9]CFU/Capsule) &#x25e6; 4 billion CFU Lactobacillus rhamnosus Lbv 96(2x10[9]CFU/Capsule) &#x25e6; 0.8 billion CFU Lactobacillus jensenii Lbv 116(0.4x10[9]CFU/Capsule) &#x25e6; 1.2 billion CFU Lactobacillus gasseri Lbv 150(0.6x10[9]CFU/Capsule). Investigators and participants will be blinded to assignment.<br><br>RESULTS: The primary outcome is detectable L. crispatus in the vaginal microbiome after twelve weeks of treatment, measured using high-throughput DNA sequencing. A total of 126 women are required to detect a 25&#xa0;% increase in detectable L. crispatus. Secondary outcomes include impact of intervention on the gut microbiome and metabolome, rate of sPTB and mid-trimester loss, neonatal outcomes and maternal morbidity.<br><br>CONCLUSIONS: This randomised trial will investigate ability of an oral probiotic containing L. crispatus to increase its abundance in the vaginal microbiome, both directly by horizontal transfer and indirectly via microbiome and metabolome of the gut.}, }
@article {pmid39701354, year = {2025}, author = {Liu, J and Zhou, M and Zhou, L and Dang, R and Xiao, L and Tan, Y and Li, M and Yu, J and Zhang, P and Hernández, M and Lichtfouse, E}, title = {Methane production related to microbiota in dairy cattle feces.}, journal = {Environmental research}, volume = {267}, number = {}, pages = {120642}, doi = {10.1016/j.envres.2024.120642}, pmid = {39701354}, issn = {1096-0953}, mesh = {Animals ; *Methane/metabolism/biosynthesis ; Cattle/microbiology ; *Feces/microbiology ; Archaea/metabolism ; *Microbiota ; Bacteria/metabolism ; Dairying ; }, abstract = {Methane (CH4) emission from livestock feces, led by ruminants, shows a profound impact on global warming. Despite this, we have almost no information on the syntrophy of the intact microbiome metabolisms, from carbohydrates to the one-carbon units, covering multiple stages of ruminant development. In this study, syntrophic effects of polysaccharide degradation and acetate-producing bacteria, and methanogenic archaea were revealed through metagenome-assembled genomes from water saturated dairy cattle feces. Although CH4 is thought to be produced by archaea, more edges, nodes, and balanced interaction types revealed by network analysis provided a closed bacteria-archaea network. The CH4 production potential and pathways were further evaluated through dynamic, thermodynamic and [13]C stable isotope analysis. The powerful CH4 production potential benefited from the metabolic flux: classical polysaccharides, soluble sugar (glucose, galactose, lactose), acetate, and CH4 produced via typical acetoclastic methanogenesis. In comparison, a cooperative model dominated by hydrogenotrophic methanogenic archaea presented a weak ability to generate CH4. Our findings comprehensively link carbon and CH4 metabolism paradigm to specific microbial lineages which are shaped related to developmental stages of the dairy cattle, directing influencing global warming from livestock and waste treatment.}, }
@article {pmid39700995, year = {2025}, author = {Xu, X and Hao, Y and Cai, Z and Cao, Y and Jia, W and Zhao, J and White, JC and Ma, C}, title = {Nanoscale‑boron nitride positively alters rhizosphere microbial communities and subsequent cucumber (Cucumis sativa) growth: A metagenomic analysis.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {178115}, doi = {10.1016/j.scitotenv.2024.178115}, pmid = {39700995}, issn = {1879-1026}, mesh = {*Rhizosphere ; *Soil Microbiology ; *Cucumis sativus/growth &amp; development ; *Microbiota/drug effects ; Metagenomics ; Boron ; Soil/chemistry ; Boron Compounds ; }, abstract = {Boron (B) deficiency affects over 132 crop species globally, making effective B supplement crucial for enhancing agricultural yield and health. This study explores an innovative application of nanoscale boron nitride (nano-BN) as a sustainable solution for addressing B deficiency in crops. Cucumber seedlings were treated with different contents of nano-BN under greenhouse conditions and both B and N ionic treatments were set as comparisons. Results show that soil application of 10 mg/kg nano-BN achieved a remarkable 15.8 % increase in fresh weight compared to the control. Notably, nano-BN exhibited superior efficiency in providing essential micronutrients without inducing toxicity as compared to traditional ionic B sources. Phytohormone correlation analysis reveals that nano-BN application significantly enhances levels of indole-3-acetic acid (IAA) and cytokinins while reducing abscisic acid (ABA), fostering optimal plant growth conditions. Furthermore, increases in dissolved organic matter (DOM) and dissolved organic carbon (DOC) levels in the rhizosphere improve nutrient availability and promote beneficial microbial activity in the soil as affected by nano-BN. Metagenomics techniques were used to investigate the impact of nano-BN on soil carbon and nitrogen cycling, alongside its effects on the soil microbiome. The upregulation of genes associated with fermentation pathways as affected by nano-BN suggests the enhanced carbon cycling. Additionally, nano-BN upregulated a number of functional genes involved in nitrogen-based processes, leading to a significant increase in microorganisms harboring nitrogen-fixing genes, including Phenylobacterium, Novosphingobium, and Reyranella. Overall, these findings provide valuable insight into the application of nano-BN in agriculture to sustainably increase crop productivity and enhance the efficiency of carbon and nitrogen cycling.}, }
@article {pmid39700989, year = {2025}, author = {Liu, F and Zeng, J and Ding, J and Wang, C and He, Z and Liu, Z and Shu, L}, title = {Microbially-driven phosphorus cycling and its coupling mechanisms with nitrogen cycling in mangrove sediments.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {178118}, doi = {10.1016/j.scitotenv.2024.178118}, pmid = {39700989}, issn = {1879-1026}, mesh = {*Phosphorus/analysis/metabolism ; *Geologic Sediments/microbiology/chemistry ; *Wetlands ; *Nitrogen Cycle ; Nitrogen/analysis ; *Microbiota ; }, abstract = {The phosphorus (P) cycle plays a crucial role in the biogeochemical cycling of mangrove sediments. However, the diversity of microbially-driven P-cycling and its coupling with nitrogen (N)-cycling remain poorly understood. In this study, we used metagenomic approaches to investigate microbial P-cycling and its potential interactions with N-cycling in mangrove sediments. Our results revealed that pH, total carbon, and total nitrogen were key environmental factors influencing the diversity of P-cycling microbial communities. Phosphorus metabolic pathways differed among mangrove sediment depths. In surface sediments (0-5 cm), microbial communities primarily acquired readily available inorganic phosphorus, whereas, in deeper sediments (>60 cm), they hydrolyzed more persistent triphosphates, reabsorbed nucleotides, and sourced free phosphate, reflecting a shift in phosphorus transport modes. We also identified glutamate metabolism as a potential pathway linking P-cycling with N-cycling, with these functions co-occurring in both contigs and genomes. Additionally, the diversity of microbial communities associated with the P-cycling increased with sediment depth, suggesting that microbially-driven P-cycling diversifies as depth increases. This study provides new insights into P-cycling and its potential coupling with N-cycling through glutamate metabolism, its coupling with N-cycling through glutamate metabolism.}, }
@article {pmid39700725, year = {2025}, author = {Petersen, JF and Valk, LC and Verhoeven, MD and Nierychlo, MA and Singleton, CM and Dueholm, MKD and Nielsen, PH}, title = {Diversity and physiology of abundant Rhodoferax species in global wastewater treatment systems.}, journal = {Systematic and applied microbiology}, volume = {48}, number = {1}, pages = {126574}, doi = {10.1016/j.syapm.2024.126574}, pmid = {39700725}, issn = {1618-0984}, mesh = {*Wastewater/microbiology ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Water Purification ; Biodiversity ; Oxidation-Reduction ; DNA, Bacterial/genetics ; Metagenome ; Sequence Analysis, DNA ; Denmark ; Iron/metabolism ; }, abstract = {Wastewater treatment plants rely on complex microbial communities for bioconversion and removal of pollutants, but many process-critical species are still poorly investigated. One of these genera is Rhodoferax, an abundant core genus in wastewater treatment plants across the world. The genus has been associated with many metabolic traits such as iron reduction and oxidation and denitrification. We used 16S rRNA gene amplicon data to uncover the diversity and abundance of Rhodoferax species in Danish and global treatment plants. Publicly available metagenome-assembled genomes were analyzed based on phylogenomics to delineate species and assign taxonomies based on the SeqCode. The phylogenetic analysis of "Rhodoferax" revealed that species previously assigned to Rhodoferax in wastewater treatment plants should be considered as at least eight different genera, with five representing previously undescribed genera. Genome annotation showed potential for several key-bioconversions in wastewater treatment, such as nitrate reduction, carbohydrate degradation, and accumulations of various storage compounds. Iron oxidation and reduction capabilities were not predicted for abundant species. Species-resolved FISH-Raman was performed to gain an overview of the morphology and ecophysiology of selected taxa to clarify their potential role in global wastewater treatment systems. Our study provides a first insight into the functional and ecological characteristics of several novel genera abundant in global wastewater treatment plants, previously assigned to the Rhodoferax genus.}, }
@article {pmid39699190, year = {2025}, author = {Prattico, C and Gonzalez, E and Dridi, L and Jazestani, S and Low, KE and Abbott, DW and Maurice, CF and Castagner, B}, title = {Identification of novel fructo-oligosaccharide bacterial consumers by pulse metatranscriptomics in a human stool sample.}, journal = {mSphere}, volume = {10}, number = {1}, pages = {e0066824}, pmid = {39699190}, issn = {2379-5042}, support = {DO-16//UofA | Canadian Glycomics Network (GlycoNet)/ ; PJT-437944//Canadian Government | Canadian Institutes of Health Research (CIHR)/ ; }, mesh = {Humans ; *Feces/microbiology ; *Oligosaccharides/metabolism ; *Gastrointestinal Microbiome/genetics ; Prebiotics ; Metagenomics ; Fermentation ; *Bacteria/genetics/metabolism/classification ; RNA, Ribosomal, 16S/genetics ; Transcriptome ; Mannans/metabolism ; }, abstract = {UNLABELLED: Dietary fibers influence the composition of the human gut microbiota and directly contribute to its downstream effects on host health. As more research supports the use of glycans as prebiotics for therapeutic applications, the need to identify the gut bacteria that metabolize glycans of interest increases. Fructo-oligosaccharide (FOS) is a common diet-derived glycan that is fermented by the gut microbiota and has been used as a prebiotic. Despite being well studied, we do not yet have a complete picture of all FOS-consuming gut bacterial taxa. To identify new bacterial consumers, we used a short exposure of microbial communities in a stool sample to FOS or galactomannan as the sole carbon source to induce glycan metabolism genes. We then performed metatranscriptomics, paired with whole metagenomic sequencing, and 16S amplicon sequencing. The short incubation was sufficient to cause induction of genes involved in carbohydrate metabolism, like carbohydrate-active enzymes (CAZymes), including glycoside hydrolase family 32 genes, which hydrolyze fructan polysaccharides like FOS and inulin. Interestingly, FOS metabolism transcripts were notably overexpressed in Blautia species not previously reported to be fructan consumers. We therefore validated the ability of different Blautia species to ferment fructans by monitoring their growth and fermentation in defined media. This pulse metatranscriptomics approach is a useful method to find novel consumers of prebiotics and increase our understanding of prebiotic metabolism by CAZymes in the gut microbiota.<br><br>IMPORTANCE: Complex carbohydrates are key contributors to the composition of the human gut microbiota and play an essential role in the microbiota's effects on host health. Understanding which bacteria consume complex carbohydrates, or glycans, provides a mechanistic link between dietary prebiotics and their beneficial health effects, an essential step for their therapeutic application. Here, we used a pulse metatranscriptomics pipeline to identify bacterial consumers based on glycan metabolism induction in a human stool sample. We identified novel consumers of fructo-oligosaccharide among Blautia species, expanding our understanding of this well-known glycan. Our approach can be applied to identify consumers of understudied glycans and expand our prebiotic repertoire. It can also be used to study prebiotic glycans directly in stool samples in distinct patient populations to help delineate the prebiotic mechanism.}, }
@article {pmid39699181, year = {2025}, author = {Olson, N and Lamar, F and Mucache, H and Fafetine, J and Saíde, J and Milisse, A and Brito, DRA and Jesser, KJ and Levy, K and Freeman, MC and Nadimpalli, ML}, title = {Farm-to-fork changes in poultry microbiomes and resistomes in Maputo City, Mozambique.}, journal = {mSystems}, volume = {10}, number = {1}, pages = {e0103724}, pmid = {39699181}, issn = {2379-5077}, support = {5T32ES012870//HHS | NIH | National Institute of Environmental Health Sciences (NIEHS)/ ; T32AI138952//HHS | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; T32 ES007032/ES/NIEHS NIH HHS/United States ; 5T32ES007032-37, 5T32ES012870-15//HHS | NIH | National Institute of Environmental Health Sciences (NIEHS)/ ; T32 AI138952/AI/NIAID NIH HHS/United States ; OPP 1189339//Bill and Melinda Gates Foundation (GF)/ ; T32 ES012870/ES/NIEHS NIH HHS/United States ; //Rollins School of Public Health Dean's Pilot and Innovation Award/ ; }, mesh = {Animals ; Mozambique ; *Chickens/microbiology ; Feces/microbiology ; *Drug Resistance, Bacterial/genetics ; *Microbiota ; Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Farms ; Humans ; Gastrointestinal Microbiome ; Meat/microbiology ; }, abstract = {UNLABELLED: Increasing demand for poultry has spurred poultry production in low- and middle-income countries like Mozambique. Poultry may be an important source of foodborne, antimicrobial-resistant bacteria to consumers in settings with limited water, sanitation, and hygiene infrastructure. The Chicken Exposures and Enteric Pathogens in Children Exposed through Environmental Pathways (ChEEP ChEEP) study was conducted in Maputo City, Mozambique from 2019 to 2021 to quantify enteric pathogen exposures along the supply chain for commercial and local (i.e., scavenger) chicken breeds. Here, we performed metagenomic sequencing of total DNA from banked ChEEP ChEEP samples to characterize fecal and carcass microbiomes and resistome diversity between chicken breeds and along the supply chain. Fecal samples (n = 26) were collected from commercial and local chickens at production sites and markets and carcass (n = 49) and rinse bucket samples (n = 26) from markets. We conducted taxonomic profiling and identified antimicrobial resistance genes (ARGs) from metagenomic sequence data, focusing especially on potential human pathogens and "high-risk" ARGs. We estimated alpha diversity for each sample and compared by site and breed. We estimated Bray-Curtis dissimilarity between samples and examined clustering. We found that commercial and local chickens harbored distinct fecal potential pathogens and resistomes at production and market sites. Many potentially pathogenic bacteria and ARGs present in chicken fecal samples are also present on carcasses sold to consumers. Finally, commercial chicken carcasses contain high-risk ARGs that are not necessarily introduced from chicken feces. These results indicate markets are an important site of exposure to potentially pathogenic bacteria and high-risk ARGs.<br><br>IMPORTANCE: While chicken eggs and meat are a critical protein source in low-income settings, antibiotics are routinely fed to chickens with consequences for selection of antimicrobial resistance. Evaluating how poultry gut bacterial communities, including potential human pathogens and high-risk antimicrobial resistance genes, differ from farm to market could help identify where to target interventions to minimize transmission risks to human populations. In this study in Maputo City, Mozambique, we found compositional differences between commercial and local chicken breeds at production and market sites. We also found that while all potentially pathogenic bacteria and many high-risk antimicrobial resistance genes persisted from production and market through processing, some resistance genes were detected on carcass samples only after processing, suggesting human or environmental contamination is occurring within markets. Overall, our findings indicate that open-air markets may represent a critical juncture for human exposures to pathogens and antimicrobial resistance genes from poultry and poultry products.}, }
@article {pmid39696556, year = {2024}, author = {Amano, Y and Sachdeva, R and Gittins, D and Anantharaman, K and Lei, S and Valentin-Alvarado, LE and Diamond, S and Beppu, H and Iwatsuki, T and Mochizuki, A and Miyakawa, K and Ishii, E and Murakami, H and Jaffe, AL and Castelle, C and Lavy, A and Suzuki, Y and Banfield, JF}, title = {Diverse microbiome functions, limited temporal variation and substantial genomic conservation within sedimentary and granite rock deep underground research laboratories.}, journal = {Environmental microbiome}, volume = {19}, number = {1}, pages = {105}, pmid = {39696556}, issn = {2524-6372}, support = {JPJ007597//The Ministry of Economy, Trade and Industry of Japan/ ; 19K05342//the Japan Society for the Promotion of Science/ ; OCE2049478//National Science Foundation/ ; DE-AC02-05CH11231//the Watershed Function Scientific Focus Area funded by the U.S. Department of Energy/ ; 2230766//NSF "Four Networks for Geologic Hydrogen Storage"/ ; }, abstract = {BACKGROUND: Underground research laboratories (URLs) provide a window on the deep biosphere and enable investigation of potential microbial impacts on nuclear waste, CO2 and H2 stored in the subsurface. We carried out the first multi-year study of groundwater microbiomes sampled from defined intervals between 140 and 400 m below the surface of the Horonobe and Mizunami URLs, Japan.<br><br>RESULTS: We reconstructed draft genomes for&#x2009;>&#x2009;90% of all organisms detected over a four year period. The Horonobe and Mizunami microbiomes are dissimilar, likely because the Mizunami URL is hosted in granitic rock and the Horonobe URL in sedimentary rock. Despite this, hydrogen metabolism, rubisco-based CO2 fixation, reduction of nitrogen compounds and sulfate reduction are well represented functions in microbiomes from both URLs, although methane metabolism is more prevalent at the organic- and CO2-rich Horonobe URL. High fluid flow zones and proximity to subsurface tunnels select for candidate phyla radiation bacteria in the Mizunami URL. We detected near-identical genotypes for approximately one third of all genomically defined organisms at multiple depths within the Horonobe URL. This cannot be explained by inactivity, as in situ growth was detected for some bacteria, albeit at slow rates. Given the current low hydraulic conductivity and groundwater compositional heterogeneity, ongoing inter-site strain dispersal seems unlikely. Alternatively, the Horonobe URL microbiome homogeneity may be explained by higher groundwater mobility during the last glacial period. Genotypically-defined species closely related to those detected in the URLs were identified in three other subsurface environments in the USA. Thus, dispersal rates between widely separated underground sites may be fast enough relative to mutation rates to have precluded substantial divergence in species composition. Species overlaps between subsurface locations on different continents constrain expectations regarding the scale of global subsurface biodiversity.<br><br>CONCLUSIONS: Our analyses reveal microbiome stability in the sedimentary rocks and surprising microbial community compositional and genotypic overlap over sites separated by hundreds of meters of rock, potentially explained by dispersal via slow groundwater flow or during a prior hydrological regime. Overall, microbiome and geochemical stability over the study period has important implications for underground storage applications.}, }
@article {pmid39695983, year = {2024}, author = {Su, L and Guo, J and Shi, W and Tong, W and Li, X and Yang, B and Xiang, Z and Qin, C}, title = {Metagenomic analysis reveals the community composition of the microbiome in different segments of the digestive tract in donkeys and cows: implications for microbiome research.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {530}, pmid = {39695983}, issn = {1471-2180}, support = {2021YFF0702900//National Key Research and Development Program of China/ ; 2023-PT180-01//Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences/ ; 2021-I2M-1-039, 2021-I2M-1-034//CAMS initiative for Innovative Medicine of China/ ; }, mesh = {Animals ; *Equidae/microbiology ; Cattle/microbiology ; *Metagenomics/methods ; *Gastrointestinal Microbiome/genetics ; *Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Gastrointestinal Tract/microbiology ; Sequence Analysis, DNA/methods ; Metagenome ; Bacteroidetes/genetics/isolation &amp; purification/classification ; }, abstract = {INTRODUCTION: The intestinal microbiota plays a crucial role in health and disease. This study aimed to assess the composition and functional diversity of the intestinal microbiota in donkeys and cows by examining samples collected from different segments of the digestive tract using two distinct techniques: direct swab sampling and faecal sampling.<br><br>RESULTS: In this study, we investigated and compared the effects of multiple factors on the composition and function of the intestinal microbial community. Approximately 300 GB of metagenomic sequencing data from 91 samples obtained from various segments of the digestive tract were used, including swabs and faecal samples from monogastric animals (donkeys) and polygastric animals (cows). We assembled 4,004,115 contigs for cows and 2,938,653 contigs for donkeys, with a total of 9,060,744 genes. Our analysis revealed that, compared with faecal samples, swab samples presented a greater abundance of Bacteroidetes, whereas faecal samples presented a greater abundance of Firmicutes. Additionally, we observed significant variations in microbial composition among different digestive tract segments in both animals. Our study identified key bacterial species and pathways via different methods and provided evidence that multiple factors can influence the microbial composition. These findings provide new insights for the accurate characterization of the composition and function of the gut microbiota in microbiome research.<br><br>CONCLUSIONS: The results obtained by both sampling methods in the present study revealed that the composition and function of the intestinal microbiota in donkeys and cows exhibit species-specific and region-specific differences. These findings highlight the importance of using standardized sampling protocols to ensure accurate and consistent characterization of the intestinal microbiota in various animal species. The implications and underlying mechanisms of these associations provide multiple perspectives for future microbiome research.}, }
@article {pmid39695885, year = {2024}, author = {Galic, I and Bez, C and Bertani, I and Venturi, V and Stankovic, N}, title = {Herbicide-treated soil as a reservoir of beneficial bacteria: microbiome analysis and PGP bioinoculants in maize.}, journal = {Environmental microbiome}, volume = {19}, number = {1}, pages = {107}, pmid = {39695885}, issn = {2524-6372}, support = {451-03-47/2023-01/ 200042//Ministarstvo Prosvete, Nauke i Tehnolo&#x161;kog Razvoja/ ; 451-03-47/2023-01/ 200042//Ministarstvo Prosvete, Nauke i Tehnolo&#x161;kog Razvoja/ ; Research and Training Grant 1818//FEMS/ ; }, abstract = {BACKGROUND: Herbicides are integral to agricultural weed management but can adversely affect non-target organisms, soil health, and microbiome. We investigated the effects of herbicides on the total soil bacterial community composition using 16S rRNA gene amplicon community profiling. Further, we aimed to identify herbicide-tolerant bacteria with plant growth-promoting (PGP) capabilities as a mitigative strategy for these negative effects, thereby promoting sustainable agricultural practices.<br><br>RESULTS: A bacterial community analysis explored the effects of long-term S-metolachlor application on soil bacterial diversity, revealing that the herbicide's impact on microbial communities is less significant than the effects of temporal factors (summer vs. winter) or agricultural practices (continuous maize cultivation vs. maize-winter wheat rotation). Although S-metolachlor did not markedly alter the overall bacteriome structure in our environmental context, the application of enrichment techniques enabled the selection of genera such as&#xa0;Pseudomonas, Serratia, and Brucella, which were rare in metagenome analysis of soil samples. Strain isolation revealed a rich source of herbicide-tolerant PGP bacteria within the culturable microbiome fraction, termed the high herbicide concentration tolerant (HHCT) bacterial culture collection. Within the HHCT collection, we isolated 120 strains that demonstrated significant in vitro PGP and biocontrol potential, and soil quality improvement abilities. The most promising HHCT isolates were combined into three consortia, each exhibiting a comprehensive range of plant-beneficial traits. We evaluated the efficacy and persistence of these multi-strain consortia during 4-week in pot experiments on maize using both agronomic parameters and 16S rRNA gene community analysis assessing early-stage plant development, root colonization, and rhizosphere persistence. Notably, 7 out of 10 inoculated consortia partners successfully established themselves and persisted in the maize root microbiome without significantly altering host root biodiversity. Our results further evidenced that all three consortia positively impacted both seed germination and early-stage plant development, increasing shoot biomass by up to 47%.<br><br>CONCLUSIONS: Herbicide-treated soil bacterial community analysis revealed that integrative agricultural practices can suppress the effects of continuous S-metolachlor application on soil microbial diversity and stabilize microbiome fluctuations. The HHCT bacterial collection holds promise as a source of beneficial bacteria that promote plant fitness while maintaining herbicide tolerance.}, }
@article {pmid39695297, year = {2024}, author = {Conteville, LC and Silva, JVD and Andrade, BGN and Coutinho, LL and Palhares, JCP and Regitano, LCA}, title = {Recovery of metagenome-assembled genomes from the rumen and fecal microbiomes of Bos indicus beef cattle.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1385}, pmid = {39695297}, issn = {2052-4463}, mesh = {Animals ; Cattle/microbiology ; *Feces/microbiology ; *Metagenome ; *Rumen/microbiology ; *Phylogeny ; Gastrointestinal Microbiome ; Brazil ; Male ; Archaea/genetics/classification ; Bacteria/genetics/classification ; Microbiota ; }, abstract = {Nelore is a Bos indicus beef breed that is well-adapted to tropical environments and constitutes most of the world's largest commercial cattle herd: the Brazilian bovine herd. Despite its significance, microbial genome recovery from ruminant microbiomes has largely excluded representatives from Brazilian Nelore cattle. To address this gap, this study presents a comprehensive dataset of microbial genomes recovered from the rumen and feces of 52 Brazilian Nelore bulls. A total of 1,526 non-redundant metagenome-assembled genomes (MAGs) were recovered from their gastrointestinal tract, with 497 ruminal and 486 fecal classified as high-quality. Phylogenetic analysis revealed that the bacterial MAGs fall into 12 phyla, with Firmicutes and Bacteroidota being the most predominant, while all archaeal MAGs belong to the genus Methanobrevibacter. The exploration of these microbial genomes will provide valuable insights into the metabolic potential and functional roles of individual microorganisms within host-microbiome interactions, contributing to a better understanding of the microbiome's roles in bovine performance.}, }
@article {pmid39695203, year = {2024}, author = {Jeon, J and Park, Y and Lee, DH and Kim, JH and Jin, YK and Hong, JK and Lee, YM}, title = {Microbial profiling of the East Siberian Sea sediments using 16S rRNA gene and metagenome sequencing.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1350}, pmid = {39695203}, issn = {2052-4463}, mesh = {*Geologic Sediments/microbiology ; *RNA, Ribosomal, 16S/genetics ; *Metagenome ; *Archaea/genetics/classification ; *Bacteria/genetics/classification ; Arctic Regions ; Microbiota ; Oceans and Seas ; Siberia ; }, abstract = {The Arctic Ocean is experiencing significant global warming, leading to reduced sea-ice cover, submarine permafrost thawing, and increased river discharge. The East Siberian Sea (ESS) undergoes more significant terrestrial inflow from coastal erosion and river runoff than other Arctic seas. Despite extensive research on environmental changes, microbial communities and their functions in the ESS, which are closely related to environmental conditions, remain largely unexplored. Here, we investigated microbial communities in ESS surface sediments spanning latitudes from 73°N to 77°N using 16S rRNA amplicon sequencing, and reconstructed 211 metagenome-assembled genomes (MAGs) using shotgun metagenome sequencing. Taxonomic analysis identified 209 bacterial MAGs, with the predominant phyla Pseudomonadota (n = 82), Actinobacteriota (n = 38), Desulfobacterota (n = 23), along with 2 archaeal MAGs of Thermoproteota. Notably, 86% of the MAGs (n = 183) could not be classified into known species, indicating the potential presence of novel and unidentified microorganisms in the ESS. This dataset provides invaluable information on the microbial diversity and ecological functions in the rapidly changing ESS.}, }
@article {pmid39694116, year = {2025}, author = {Zhong, S and Yang, YN and Huo, JX and Sun, YQ and Zhao, H and Dong, XT and Feng, JY and Zhao, J and Wu, CM and Li, YG}, title = {Cyanidin-3-rutinoside from Mori Fructus ameliorates dyslipidemia via modulating gut microbiota and lipid metabolism pathway.}, journal = {The Journal of nutritional biochemistry}, volume = {137}, number = {}, pages = {109834}, doi = {10.1016/j.jnutbio.2024.109834}, pmid = {39694116}, issn = {1873-4847}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Lipid Metabolism/drug effects ; *Anthocyanins/pharmacology ; *Dyslipidemias/drug therapy/metabolism ; Male ; *Morus/chemistry ; Mice ; Mice, Inbred C57BL ; Diet, High-Fat/adverse effects ; Fruit/chemistry ; }, abstract = {Dyslipidemia is responsible for pathologies of cardiovascular diseases and gut microbiota plays an essential role in lipid metabolism. Dietary supplementation is an important supplement to medicine in management of dyslipidemia. Mori Fructus is a popular Asia medical food with various pharmacological benefits including anti-hyperlipidemia. Cyanidin-3-rutinoside (C3R) is the main anthocyanin component in Mori Fructus, but the lipid-lowering effect and underlying mechanism of Mori Fructus-derived C3R remains unknown. In this study, we assessed the beneficial effect of Mori Fructus-derived C3R in HFD-induced hyperlipidemic mice and investigated its potential mechanism through 16S rRNA-based metagenomics and transcriptomics analysis. Our results showed that C3R from Mori Fructus significantly decreased serum lipid levels and attenuated hepatic damage induced by HFD. Analysis of the gut microbiota revealed that C3R altered the specific gut micorbiota but not changed its diversity. Among changed genera, Family_XIII_UCG-001 was significantly enriched by C3R, and it was positively associated with HDL-c, but negatively related with TC, TG, LDL-c, insulin and body weight. Transcriptomic analysis showed that C3R activates the lipid metabolism related pathways including MAPK signaling pathway, Rap1 signaling pathway, Ras signaling pathway and PI3K-Akt signaling pathway. Additionally, correlation analysis unraveled that C3R-enriched Family_XIII_UCG-001 was negatively associated with C3R-inhibited genes of Camk2a, Eef1a2, Gad1, Kif5a and Sv2b, which further positively related with TC, TG, LDL-c, insulin and body weight, but negatively associated with HDL-c. In sum, C3R may inhibit expression of immune-related genes by enriching the Family_XIII_UCG-001 genus, further ameliorating lipid metabolism disorders in HFD-challenged mice. This study provides an optional strategy for the daily management of dyslipidemia.}, }
@article {pmid39693966, year = {2025}, author = {Li, T and Wang, P and Zhi, Z and Guo, T and Zhou, J and Zhang, H and Cao, C and Cai, Y and Li, Y and Zhang, J}, title = {Free-caged rearing modes regulate chicken intestinal metabolism by influencing gut microbial homeostasis.}, journal = {Poultry science}, volume = {104}, number = {1}, pages = {104381}, pmid = {39693966}, issn = {1525-3171}, mesh = {Animals ; *Chickens/microbiology/physiology/metabolism ; *Gastrointestinal Microbiome/physiology ; *Animal Husbandry/methods ; Homeostasis ; Bacteria/classification/isolation &amp; purification ; Male ; Cecum/microbiology ; }, abstract = {Free-caged rearing modes, which prioritize animal welfare, are believed to enhance the quality of animal products. The impact of rearing modes on meat quality may play a key role in the superior quality of local chicken breeds. This study analyzed the cecal contents of free-range and caged black-bone chickens at different ages using metagenomic and metabolomic sequencing. We identified 32 metabolites and 367 microbial species significantly affected by the rearing mode. Linear discriminant analysis Effect Size (LefSe) highlighted five key microorganisms, Gemmiger formicilis, Bacteria unclassified, Bacteroides sp. ET225, Massilistercora timonensis, and Bacteroidales unclassified, that showed distinct abundance patterns across all age points. Among them, Bacteroides sp. ET225 and Massilistercora timonensis were positively associated with certain phospholipids and plant-derived metabolites, while negatively correlated with others like demissidine and acylcarnitine. Functional analysis revealed that rearing modes impact gut metabolites involved in gut metabolism as well as broader processes such as signal transduction, protein digestion, and autophagy. This study offers new insights into how rearing modes influence gut microbiota and metabolites, shedding light on the study of rearing mode-mediated muscle development and fat deposition.}, }
@article {pmid39693773, year = {2025}, author = {Shen, D and Li, C and Guo, Z}, title = {Dynamics of antibiotic resistance in poultry farms via multivector analysis.}, journal = {Poultry science}, volume = {104}, number = {2}, pages = {104673}, pmid = {39693773}, issn = {1525-3171}, mesh = {Animals ; *Chickens/microbiology ; Animal Husbandry ; *Drug Resistance, Microbial/genetics ; *Anti-Bacterial Agents/pharmacology ; Farms ; *Microbiota ; *Bacteria/drug effects/genetics ; *Drug Resistance, Bacterial ; Soil Microbiology ; }, abstract = {This study examines the distribution of microbial communities and antibiotic resistance genes (ARGs) across various vectors in poultry farm environments. The results show that airborne particulate matter (PM) and soil harbor the highest counts of microbial genes, exceeding those found in poultry visceral samples, which display lower microbial diversity and ARG levels. This highlights environmental vectors, particularly soil and PM, as major reservoirs for ARGs. Proteobacteria, predominantly present in feces and feed, are identified as key carriers of ARGs, with resistance mechanisms primarily involving efflux and target modification. Notably, Chlamydia spp. in visceral samples, despite lower overall abundance, show a high proportion of ARGs, raising concerns about ARG persistence in poultry microbiota. Furthermore, a significant correlation between different ARGs was detected, indicating the possibility of cooperative transmission processes. The findings underline the role of PM in ARG transmission due to its mobility and capacity to retain ARGs across distances. Additionally, therapeutic antibiotics in feed may contribute to ARG proliferation in animal microbiomes, suggesting a need for improved management practices to mitigate ARG spread in poultry farming environments.}, }
@article {pmid39693444, year = {2024}, author = {Ruff, SE and de Angelis, IH and Mullis, M and Payet, JP and Magnabosco, C and Lloyd, KG and Sheik, CS and Steen, AD and Shipunova, A and Morozov, A and Reese, BK and Bradley, JA and Lemonnier, C and Schrenk, MO and Joye, SB and Huber, JA and Probst, AJ and Morrison, HG and Sogin, ML and Ladau, J and Colwell, F}, title = {A global comparison of surface and subsurface microbiomes reveals large-scale biodiversity gradients, and a marine-terrestrial divide.}, journal = {Science advances}, volume = {10}, number = {51}, pages = {eadq0645}, pmid = {39693444}, issn = {2375-2548}, mesh = {*Microbiota/genetics ; *Biodiversity ; *Archaea/genetics/classification ; *Phylogeny ; *Bacteria/genetics/classification ; Metagenome ; Seawater/microbiology ; Ecosystem ; }, abstract = {Subsurface environments are among Earth's largest habitats for microbial life. Yet, until recently, we lacked adequate data to accurately differentiate between globally distributed marine and terrestrial surface and subsurface microbiomes. Here, we analyzed 478 archaeal and 964 bacterial metabarcoding datasets and 147 metagenomes from diverse and widely distributed environments. Microbial diversity is similar in marine and terrestrial microbiomes at local to global scales. However, community composition greatly differs between sea and land, corroborating a phylogenetic divide that mirrors patterns in plant and animal diversity. In contrast, community composition overlaps between surface to subsurface environments supporting a diversity continuum rather than a discrete subsurface biosphere. Differences in microbial life thus seem greater between land and sea than between surface and subsurface. Diversity of terrestrial microbiomes decreases with depth, while marine subsurface diversity and phylogenetic distance to cultured isolates rivals or exceeds that of surface environments. We identify distinct microbial community compositions but similar microbial diversity for Earth's subsurface and surface environments.}, }
@article {pmid39693209, year = {2025}, author = {Yamamoto, A and Kawashima, A and Uemura, T and Nakano, K and Matsushita, M and Ishizuya, Y and Jingushi, K and Hase, H and Katayama, K and Yamaguchi, R and Sassi, N and Motoyama, Y and Nojima, S and Mita, M and Kimura, T and Motooka, D and Horibe, Y and Okuda, Y and Oka, T and Yamamichi, G and Tomiyama, E and Koh, Y and Yamamoto, Y and Kato, T and Hatano, K and Uemura, M and Imoto, S and Wada, H and Morii, E and Tsujikawa, K and Nonomura, N}, title = {A novel mouse model of upper tract urothelial carcinoma highlights the impact of dietary intervention on gut microbiota and carcinogenesis prevention despite carcinogen exposure.}, journal = {International journal of cancer}, volume = {156}, number = {7}, pages = {1439-1456}, pmid = {39693209}, issn = {1097-0215}, support = {19K09709//Japan Society for the Promotion of Science/ ; 21K20968//Japan Society for the Promotion of Science/ ; 22H03213//Japan Society for the Promotion of Science/ ; 22K09523//Japan Society for the Promotion of Science/ ; 22K18398//Japan Society for the Promotion of Science/ ; JP22ym0126809i0002//Japan Agency for Medical Research and Development/ ; JP23ama121054//Japan Agency for Medical Research and Development/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; Female ; Butylhydroxybutylnitrosamine/toxicity ; Carcinogens/toxicity ; Disease Models, Animal ; Humans ; Male ; Mice, Inbred BALB C ; Carcinogenesis/drug effects ; *Urologic Neoplasms/chemically induced/pathology/prevention &amp; control/microbiology ; *Urinary Bladder Neoplasms/chemically induced/pathology ; Urothelium/pathology ; }, abstract = {Animal models of N-butyl-N-(4-hydroxy butyl) nitrosamine (BBN)-induced urothelial carcinoma (UC), particularly bladder cancer (BC), have long been established. However, the rare incidence of BBN-induced upper urinary tract UC (UTUC), which originates from the same urothelium as BC, remains elusive. The scarcity of animal models of UTUC has made it challenging to study the biology of UTUC. To address this problem, we tried to establish a novel mouse model of UTUC by treating multiple mice strains and sexes with BBN. The molecular consistency between the UTUC mouse model and human UTUC was confirmed using multi-omics analyses, including whole-exome, whole-transcriptome, and spatial transcriptome sequencing. 16S ribosomal RNA metagenome sequencing, metabolome analysis, and dietary interventions were employed to assess changes in the gut microbiome, metabolome, and carcinogenesis of UTUC. Of all treated mice, only female BALB/c mice developed UTUC over BC. Multi-omics analyses confirmed that the UTUC model reflected the molecular characteristics and heterogeneity of human UTUC with poor prognosis. Furthermore, the model exhibited increased Tnf-related inflammatory gene expression in the upper urinary tract and a low relative abundance of Parabacteroides distasonis in the gut. Dietary intervention, mainly without alanine, led to P. distasonis upregulation and successfully prevented UTUC, as well as suppressed Tnf-related inflammatory gene expression in the upper urinary tract despite the exposure to BBN. This is the first report to demonstrate a higher incidence of UTUC than BC in a non-engineered mouse model using BBN. Overall, this model could serve as a useful tool for comprehensively investigating UTUC in future studies.}, }
@article {pmid39692191, year = {2025}, author = {Zou, X and Yan, M and Wang, Y and Ni, Y and Zhao, J and Lu, B and Liu, B and Cao, B}, title = {Accurate Diagnosis of Lower Respiratory Infections Using Host Response and Respiratory Microbiome from a Single Metatranscriptome Test of Bronchoalveolar Lavage Fluid.}, journal = {Advanced science (Weinheim, Baden-Wurttemberg, Germany)}, volume = {12}, number = {6}, pages = {e2405087}, pmid = {39692191}, issn = {2198-3844}, support = {2022YFA1304300//National Key R&amp;D Program of China grant/ ; ZRJY2023-GG24//China-Japan Friendship Hospital elite program grant/ ; }, mesh = {Humans ; *Bronchoalveolar Lavage Fluid/microbiology ; *Respiratory Tract Infections/diagnosis/microbiology/genetics ; Male ; Female ; *Microbiota/genetics ; Middle Aged ; Aged ; *Transcriptome/genetics ; Retrospective Studies ; Adult ; }, abstract = {Lower respiratory tract infections (LRTIs) diagnosis is challenging because noninfectious diseases mimic its clinical features. The altered host response and respiratory microbiome following LRTIs have the potential to differentiate LRTIs from noninfectious respiratory diseases (non-LRTIs). Patients suspected of having LRTIs are retrospectively enrolled and a clinical metatranscriptome test is performed on bronchoalveolar lavage fluid (BALF). Transcriptomic and metagenomic analysis profiled the host response and respiratory microbiome in patients with confirmed LRTI (n = 126) or non-LRTIs (n = 75). Patients with evidenced LRTIs exhibited enhanced pathways on chemokine and cytokine response, neutrophile recruitment and activation, along with specific gene modules linked to LRTIs status and key blood markers. Moreover, LRTIs patients exhibited reduced diversity and evenness in the lower respiratory microbiome, likely driven by an increased abundance of bacterial pathogens. Host marker genes are selected, and classifiers are developed to distinguish patients with LRTIs, non-LRTIs, and indeterminate status, achieving an area under the receiver operating characteristic curve of 0.80 to 0.86 and validated in a subsequently enrolled cohort. Incorporating respiratory microbiome features further enhanced the classifier's performance. In summary, a single metatranscriptome test of BALF proved detailed profiles of host response and respiratory microbiome, enabling accurate LRTIs diagnosis.}, }
@article {pmid39692041, year = {2025}, author = {Yang, Z and Zhang, Z and Jiang, S and Li, A and Song, H and Zhang, J}, title = {Diet shapes and maintains the personalized native gut microbiomes in mice.}, journal = {Journal of the science of food and agriculture}, volume = {105}, number = {5}, pages = {2987-3000}, doi = {10.1002/jsfa.14073}, pmid = {39692041}, issn = {1097-0010}, support = {//National Natural Science Foundation of China (No. 32222066 and No. 32160545)/ ; }, mesh = {*Gastrointestinal Microbiome ; Animals ; Mice ; Mice, Inbred C57BL ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Diet ; Male ; Humans ; Fungi/classification/isolation &amp; purification/genetics/metabolism ; Gastrointestinal Tract/microbiology/metabolism ; Feces/microbiology ; }, abstract = {BACKGROUND: The gut microbiome plays a critical role in human health and disease. Different dietary backgrounds play an important role in the uniqueness and diversity of the gut microbiota in different individuals, which promotes heterogeneity in disease phenotypes and treatment responses. Here, we explored how diet affects the composition and function of the native gut microbiome of model mice, based on the shotgun metagenomic and metabolomic, by analyzing the gut microbiome of C57B/6J mice in different dietary backgrounds.<br><br>RESULTS: The gut microbiomes of mice receiving different diets consistently exhibit distinct compositions across bacterial species, strains, fungi and phages. This implies that native microbial communities cannot 'homogenize' rapidly becaise of priority effects and unchanging diets. Notably, hotspot bacteria such as Limosilactobacillus reuteri, Parabacteroides distasonis and Akkermansia muciniphila were significantly different among the groups. These species harbor diverse adaptive mutations, reflecting genomic evolutionary diversity. The functional profiles of the gut microbiota also exhibit selective differences, involving the capacity for carbohydrate, branched-chain amino acid and fatty acid synthesis, as well as virulence factors, carbohydrate-active enzymes and antibiotic resistance. Furthermore, the differences in the gut microbiota also propagate to the host's serum, where structural and specific metabolite differences were observed. Metabolites that directly impact host health, such as d-glucosamine 6-phosphate and testolic acid, also show significant differences between the different dietary groups.<br><br>CONCLUSION: Our findings underscore the profound influence of different dietary the composition and functionality of the gut microbiome, offering valuable insights into optimizing health outcomes through personalized nutritional interventions. &#xa9; 2024 Society of Chemical Industry.}, }
@article {pmid39690119, year = {2025}, author = {Di Gloria, L and Baldi, S and Curini, L and Bertorello, S and Nannini, G and Cei, F and Niccolai, E and Ramazzotti, M and Amedei, A}, title = {Experimental tests challenge the evidence of a healthy human blood microbiome.}, journal = {The FEBS journal}, volume = {292}, number = {4}, pages = {796-808}, pmid = {39690119}, issn = {1742-4658}, support = {//Ministry of University and Research (MUR)/ ; //FONZIE project (CUP B55F21007810001)/ ; //National Recovery and Resilience Plan (NRRP)/ ; }, mesh = {Humans ; *Microbiota/genetics ; High-Throughput Nucleotide Sequencing ; RNA, Ribosomal, 16S/genetics ; DNA, Bacterial/genetics/blood ; *Bacteria/genetics/classification/isolation &amp; purification ; Metagenomics/methods ; *Blood/microbiology ; Healthy Volunteers ; Sequence Analysis, DNA ; }, abstract = {The advent of next-generation sequencing (NGS) technologies has made it possible to investigate microbial communities in various environments, including different sites within the human body. Therefore, the previously established belief of the sterile nature of several body sites, including human blood, has now been challenged. However, metagenomics investigation of areas with an anticipated low microbial biomass may be susceptible to misinterpretation. Here, we critically evaluate the results of 16S targeted amplicon sequencing performed on total DNA collected from healthy donors' blood samples while incorporating specific negative controls aimed at addressing potential bias to supplement and strengthen the research in this area. We prepared negative controls by increasing the initial DNA quantity through sequences that can be recognized and subsequently discarded. We found that only three organisms were sporadically present among the samples, and this was mostly attributable to bacteria ubiquitously present in laboratory reagents. Despite not fully confirming or denying the existence of healthy blood microbiota, our results suggest that living bacteria, or at least their residual DNA sequences, are not a common feature of human blood in healthy people. Finally, our study poses relevant questions on the design of controls in this research area that must be considered in order to avoid misinterpreted results that appear to contaminate current high-throughput research.}, }
@article {pmid39688845, year = {2024}, author = {Oteo-García, G and Mutti, G and Caldon, M and Oosthuitzen, O and ManfrediniK, M and Capelli, C}, title = {Reconstructing micro-evolutionary dynamics shaping local variation in southern African populations using genomics, metagenomics and personal metadata.}, journal = {Journal of anthropological sciences = Rivista di antropologia : JASS}, volume = {102}, number = {}, pages = {123-143}, doi = {10.4436/JASS.10204}, pmid = {39688845}, issn = {2037-0644}, mesh = {Humans ; Namibia ; *Metagenomics ; *Saliva/microbiology/virology ; *Microbiota/genetics ; Male ; Female ; Adult ; Lesotho ; Genomics ; Genetic Variation ; Young Adult ; Middle Aged ; Adolescent ; Black People/genetics ; }, abstract = {Geography is a well-known factor shaping genetic variation in human populations. However, the potential role played by cultural variables remains much understudied. This study investigates the impact of socio-cultural variables on genomic similarity and the saliva microbiome, using data from populations in Lesotho and Namibia. Geographic distance within Lesotho increases genetic differentiation, while shared clan affiliation surprisingly increases it. In Namibia, ethnicity is the predominant factor influencing genetic affinity. Saliva metagenomic data shows a negative correlation between age and alpha diversity, with notable differences in host-interacting taxa and viral load. These findings highlight the role of geography in shaping genetic affinity even at small scales and the complex influences of cultural factors. The saliva microbiome appears primarily affected by unrecorded individual behaviors rather than geographic or cultural variables. At population-level these oral microbiomes reveal insights into some dietary habits, oral health, and also the communal viral load, which appears to have greater incidence in Lesotho possibly related to the long-term effects of the HIV epidemic in the country.}, }
@article {pmid39684893, year = {2024}, author = {Parkar, N and Young, W and Olson, T and Hurst, C and Janssen, P and Spencer, NJ and McNabb, WC and Dalziel, JE}, title = {Peripherally Restricted Activation of Opioid Receptors Influences Anxiety-Related Behaviour and Alters Brain Gene Expression in a Sex-Specific Manner.}, journal = {International journal of molecular sciences}, volume = {25}, number = {23}, pages = {}, pmid = {39684893}, issn = {1422-0067}, support = {C10X1706//Ministry of Business, Innovation and Employment/ ; }, mesh = {Animals ; Male ; Female ; *Anxiety/metabolism ; Rats ; *Loperamide/pharmacology ; *Brain/metabolism/drug effects ; *Rats, Sprague-Dawley ; *Receptors, Opioid/metabolism/genetics ; Behavior, Animal/drug effects ; Gastrointestinal Microbiome/drug effects ; Hippocampus/metabolism/drug effects ; Enteric Nervous System/metabolism ; Gene Expression Regulation/drug effects ; Sex Factors ; Sex Characteristics ; }, abstract = {Although effects of stress-induced anxiety on the gastrointestinal tract and enteric nervous system (ENS) are well studied, how ENS dysfunction impacts behaviour is not well understood. We investigated whether ENS modulation alters anxiety-related behaviour in rats. We used loperamide, a potent μ-opioid receptor agonist that does not cross the blood-brain barrier, to manipulate ENS function and assess changes in behaviour, gut and brain gene expression, and microbiota profile. Sprague Dawley (male/female) rats were acutely dosed with loperamide (subcutaneous) or control solution, and their behavioural phenotype was examined using open field and elevated plus maze tests. Gene expression in the proximal colon, prefrontal cortex, hippocampus, and amygdala was assessed by RNA-seq and caecal microbiota composition determined by shotgun metagenome sequencing. In female rats, loperamide treatment decreased distance moved and frequency of supported rearing, indicating decreased exploratory behaviour and increased anxiety, which was associated with altered hippocampal gene expression. Loperamide altered proximal colon gene expression and microbiome composition in both male and female rats. Our results demonstrate the importance of the ENS for communication between gut and brain for normo-anxious states in female rats and implicate corticotropin-releasing hormone and gamma-aminobutyric acid gene signalling pathways in the hippocampus. This study also sheds light on sexually dimorphic communication between the gut and the brain. Microbiome and colonic gene expression changes likely reflect localised effects of loperamide related to gut dysmotility. These results suggest possible ENS pharmacological targets to alter gut to brain signalling for modulating mood.}, }
@article {pmid39684853, year = {2024}, author = {Tynior, W and Kłósek, M and Salatino, S and Cuber, P and Hudy, D and Nałęcz, D and Chan, YT and Gustave, C and Strzelczyk, JK}, title = {Metagenomic Analysis of the Buccal Microbiome by Nanopore Sequencing Reveals Structural Differences in the Microbiome of a Patient with Molar Incisor Hypomineralization (MIH) Compared to a Healthy Child-Case Study.}, journal = {International journal of molecular sciences}, volume = {25}, number = {23}, pages = {}, pmid = {39684853}, issn = {1422-0067}, support = {PCN-1-111/N/2/O//Medical University of Silesia/ ; }, mesh = {Humans ; *Microbiota/genetics ; *Metagenomics/methods ; *Nanopore Sequencing/methods ; *Dental Enamel Hypoplasia/microbiology/genetics ; Child ; Mouth Mucosa/microbiology/pathology ; Male ; Female ; Bacteria/genetics/classification/isolation &amp; purification ; Case-Control Studies ; Metagenome ; Incisor/microbiology ; Molar Hypomineralization ; }, abstract = {Molar incisor hypomineralization (MIH) is a qualitative developmental defect that affects the enamel tissue of permanent molars and can also occur in permanent incisors. Enamel affected by MIH has reduced hardness, increased porosity, and a higher organic content than unaffected enamel. These characteristics predispose the enamel to accumulation of bacteria and a higher prevalence of caries lesions. Through a groundbreaking metagenomic analysis of the buccal mucosal sample from a patient with MIH, we explored the intricacies of its microbiome compared to a healthy control using state-of-the-art nanopore long-read sequencing. Out of the 210 bacterial taxa identified in the MIH microbiome, we found Streptococcus and Haemophilus to be the most abundant genera. The bacteria with the highest read counts in the patient with MIH included Streptococcus mitis, Haemophilus parainfluenzae, Streptococcus pneumoniae, Rothia dentocariosa, and Gemella haemolysans. Our results revealed a striking contrast between healthy and MIH affected children, with a higher dominance and number of pathogenic species (S. pneumoniae, H. influenzae, and N. meningitidis) and reduced diversity in the MIH-affected patient. This distinct microbial profile not only sheds light on MIH-affected patients, but paves the way for future research, inspiring deeper understanding and larger scale studies.}, }
@article {pmid39684458, year = {2024}, author = {Salini, A and Zuliani, L and Gonnelli, PM and Orlando, M and Odoardo, A and Ragno, D and Aulitto, M and Zaccone, C and Fusco, S}, title = {Plastic-Degrading Microbial Consortia from a Wastewater Treatment Plant.}, journal = {International journal of molecular sciences}, volume = {25}, number = {23}, pages = {}, pmid = {39684458}, issn = {1422-0067}, support = {CUP B53D23015130001//MUR - Italian Ministry of University and Research in the framework of the Next Generation EU action/ ; }, mesh = {*Microbial Consortia ; *Wastewater/microbiology ; *Biodegradation, Environmental ; Sewage/microbiology ; Plastics/metabolism ; Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Microbiota ; }, abstract = {Plastic waste pollution has become a global crisis, with millions of tons of plastic expected to accumulate in landfills and in natural environments, posing a serious threat to wildlife and human health. As current recycling methods remain inefficient, there is an urgent need for innovative enzymatic solutions to break down plastics and enable a circular economy approach. In this study, we explore the plastic-degrading potential of microorganisms enriched from activated sludge (AS) sourced from a municipal wastewater treatment plant (WWTP)-a known microplastic-contaminated industrial niche. Five microbial consortia (i.e., microbiomes) were enriched under selective pressure using low-carbon conditions and high concentrations of polyester polymers, including post-consumer PET, post-consumer PLA, and virgin PLA. Enrichment was performed for 100 days at 37 °C and 50 °C, followed by microbiomes isolation and metagenomic analysis to identify plastic-active bacteria and their enzymes. The results revealed that PLA polymers, but not post-consumer PET, were effectively degraded by the microbiomes, as confirmed by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC), showing significant molecular weight reduction compared to the abiotic controls. Microbial community analysis highlighted a distinct enrichment profile driven by the polymer composition and the temperature. At 50 °C, the Bacillales order became the predominant population, whereas at 37 °C, a more diverse community within the Proteobacteria and Actinobacteria phyla were selected. Nonetheless, the enriched microbial communities at both temperatures included phyla with members known for polyester degradation. Moreover, at 50 °C, enrichment of putative PET/PLA hydrolases was also observed. These findings suggest that AS microorganisms are a reservoir of polyester-active enzymes, particularly PLA-depolymerases, and hold promise for advancing biotechnological strategies to mitigate plastic pollution through re- and up-cycling.}, }
@article {pmid39684246, year = {2024}, author = {Domínguez-Pino, M and Mellado, S and Cuesta, CM and Grillo-Risco, R and García-García, F and Pascual, M}, title = {Metagenomics Reveals Sex-Based Differences in Murine Fecal Microbiota Profiles Induced by Chronic Alcohol Consumption.}, journal = {International journal of molecular sciences}, volume = {25}, number = {23}, pages = {}, pmid = {39684246}, issn = {1422-0067}, support = {2023-I024//the Spanish Ministry of Health-PNSD/ ; CIAICO/2021/203//GVA/ ; RD21/0009/0005//the Primary Addiction Care Research Network/ ; pro-ject IMPaCT-Data, exp. IMP/00019//FGG and RGR were supported by and partially funded by the Institute of Health Carlos III/ ; PID2023-146865OB-I00 and PID2021-124430OA-I00//MCIN/AEI/10.13039/501100011033/ FEDER/ ; }, mesh = {Animals ; Female ; Male ; *Feces/microbiology ; Mice ; *Gastrointestinal Microbiome/drug effects ; *Toll-Like Receptor 4/genetics/metabolism ; *Metagenomics/methods ; *Mice, Knockout ; *RNA, Ribosomal, 16S/genetics ; *Ethanol/adverse effects ; Alcohol Drinking/adverse effects ; Mice, Inbred C57BL ; Sex Factors ; Dysbiosis/microbiology/chemically induced ; Sex Characteristics ; }, abstract = {Chronic ethanol exposure induces an inflammatory response within the intestinal tract, compromising mucosal and epithelial integrity and leading to dysbiosis of the gut microbiome. However, the specific roles of the gut microbiota in mediating ethanol-induced effects, as well as their interactions with the immune system, remain poorly characterized. This study aimed to evaluate sex-based differences in fecal microbiota profiles induced by chronic alcohol consumption and to assess whether TLR4 is involved in these effects. We analyzed the 16S rRNA gene sequencing of fecal samples from male and female wild-type (WT) and TLR4-knockout (TLR4-KO) mice with and without chronic ethanol exposure over a three-month period. Our findings provide evidence, for the first time, that male mice are more susceptible to the effects of ethanol on the fecal microbiota, since ethanol exposure induced greater alterations in the Gram-negative and -positive bacteria with immunogenic capacity in the WT male mice than in the female mice. We also demonstrate that the absence of immune receptor TLR4 leads to different microbiota in both sexes, showing anti-inflammatory and protective properties for intestinal barrier function and resulting in a phenotype more resistant to ethanol's effects. These findings may open new avenues for understanding the relationship between gut microbiota profiles and inflammation in the digestive system induced by chronic alcohol consumption.}, }
@article {pmid39683635, year = {2024}, author = {Ouédraogo, LO and Deng, L and Ouattara, CA and Compaoré, A and Ouédraogo, M and Argaw, A and Lachat, C and Houpt, ER and Saidi, Q and Haerynck, F and Sonnenburg, J and Azad, MB and Tavernier, SJ and Bastos-Moreira, Y and Toe, LC and Dailey-Chwalibóg, T}, title = {Describing Biological Vulnerability in Small, Vulnerable Newborns in Urban Burkina Faso (DenBalo): Gut Microbiota, Immune System, and Breastmilk Assembly.}, journal = {Nutrients}, volume = {16}, number = {23}, pages = {}, pmid = {39683635}, issn = {2072-6643}, support = {INV-035474/GATES/Gates Foundation/United States ; INV-036154/GATES/Gates Foundation/United States ; INV-035474 &amp; INV-036154/GATES/Gates Foundation/United States ; }, mesh = {Humans ; Burkina Faso ; Female ; Infant, Newborn ; *Gastrointestinal Microbiome ; *Milk, Human/immunology ; Prospective Studies ; *Vagina/microbiology/immunology ; *Immune System ; Pregnancy ; Breast Feeding ; Infant, Small for Gestational Age ; Adult ; }, abstract = {Background: Small vulnerable newborns (SVNs), including those born preterm, small for gestational age, or with low birth weight, are at higher risk of neonatal mortality and long-term health complications. Early exposure to maternal vaginal microbiota and breastfeeding plays a critical role in the development of the neonatal microbiota and immune system, especially in low-resource settings like Burkina Faso, where neonatal mortality rates remain high. Objectives: The DenBalo study aims to investigate the role of maternal and neonatal factors, such as vaginal and gut microbiota, immune development, and early nutrition, in shaping health outcomes in SVNs and healthy infants. Methods: This prospective cohort observational study will recruit 141 mother-infant pairs (70 SVNs and 71 healthy controls) from four health centers in Bobo-Dioulasso, Burkina Faso. The mother-infant pairs will be followed for six months with anthropometric measurements and biospecimen collections, including blood, breast milk, saliva, stool, vaginal swabs, and placental biopsies. Multi-omics approaches, encompassing metagenomics, metabolomics, proteomics, and immune profiling, will be used to assess vaginal and gut microbiota composition and functionality, immune cell maturation, and cytokine levels at critical developmental stages. Conclusions: This study will generate comprehensive data on how microbiota, metabolomic, and proteomic profiles, along with immune system development, differ between SVNs and healthy infants. These findings will guide targeted interventions to improve neonatal health outcomes and reduce mortality, particularly in vulnerable populations.}, }
@article {pmid39682735, year = {2024}, author = {Hemmati, MA and Monemi, M and Asli, S and Mohammadi, S and Foroozanmehr, B and Haghmorad, D and Oksenych, V and Eslami, M}, title = {Using New Technologies to Analyze Gut Microbiota and Predict Cancer Risk.}, journal = {Cells}, volume = {13}, number = {23}, pages = {}, pmid = {39682735}, issn = {2073-4409}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Neoplasms/microbiology ; Machine Learning ; High-Throughput Nucleotide Sequencing/methods ; Metagenomics/methods ; }, abstract = {The gut microbiota significantly impacts human health, influencing metabolism, immunological responses, and disease prevention. Dysbiosis, or microbial imbalance, is linked to various diseases, including cancer. It is crucial to preserve a healthy microbiome since pathogenic bacteria, such as Escherichia coli and Fusobacterium nucleatum, can cause inflammation and cancer. These pathways can lead to the formation of tumors. Recent advancements in high-throughput sequencing, metagenomics, and machine learning have revolutionized our understanding of the role of gut microbiota in cancer risk prediction. Early detection is made easier by machine learning algorithms that improve the categorization of cancer kinds based on microbiological data. Additionally, the investigation of the microbiome has been transformed by next-generation sequencing (NGS), which has made it possible to fully profile both cultivable and non-cultivable bacteria and to understand their roles in connection with cancer. Among the uses of NGS are the detection of microbial fingerprints connected to treatment results and the investigation of metabolic pathways implicated in the development of cancer. The combination of NGS with machine learning opens up new possibilities for creating customized medicine by enabling the development of diagnostic tools and treatments that are specific to each patient's microbiome profile, even in the face of obstacles like data complexity. Multi-omics studies reveal microbial interactions, biomarkers for cancer detection, and gut microbiota's impact on cancer progression, underscoring the need for further research on microbiome-based cancer prevention and therapy.}, }
@article {pmid39681310, year = {2025}, author = {Tobar, Z and Lee, KY and Gaa, ME and Moore, BP and Li, X and Pitesky, ME}, title = {Evaluation of 16s Long Read Metabarcoding for Characterizing the Microbiome and Salmonella Contamination of Retail Poultry Meat.}, journal = {Journal of food protection}, volume = {88}, number = {2}, pages = {100434}, doi = {10.1016/j.jfp.2024.100434}, pmid = {39681310}, issn = {1944-9097}, mesh = {Microbiota/genetics ; *Salmonella enterica/genetics/isolation &amp; purification ; *Meat Products/microbiology ; *Food Microbiology/methods ; *Poultry/microbiology ; DNA Barcoding, Taxonomic ; Polymerase Chain Reaction ; *RNA, Ribosomal, 16S/genetics/isolation &amp; purification ; Limit of Detection ; }, abstract = {The traditional gold standard for detection of Salmonella in meat products is bacterial culture with enrichment. While this method is highly sensitive, it is slow and provides an incomplete assessment of isolate taxonomy in positive samples. This study presents a novel PCR-based detection assay which amplifies the 16s-ITS-23s region which is an approximately 2,500 base pair region of the larger ribosomal rrn operon. Intra-assay variation was assessed by splitting each biological sample into 3 technical replicates. Limits of detection (LOD) were assessed by utilizing a serial dilution of a pure culture of Salmonella enterica subsp. enterica serovar Heidelberg spiked into either sterile 1 × PBS or 1 × PBS rinsate of a Salmonella culture-negative chicken meat sample. Results indicate the 16s metabarcoding assay evaluated here could not be reliably used for the detection of Salmonella in adulterated retail meat samples as the LOD observed, 4.70 log colony forming units (CFU)/ml, is above the expected concentration of Salmonella in retail poultry meat samples which previous studies have shown range from under 1 to 2 log CFU/ml. However, due to greater taxonomic resolution afforded by using 16s long reads, the assay allowed alpha diversity assessment of the microbiome of raw poultry meat with the ability to assign taxonomy to the species and strain level for some amplicon sequence variants (ASV). This indicates this process may have value characterizing biodiversity and pathogen contamination of poultry samples in earlier steps of the poultry meat production process where bacterial contamination concentrations are likely to be higher.}, }
@article {pmid39680298, year = {2025}, author = {Han, L and Lin, C and Lan, Y and Hua, Y and Wu, J and Fan, Z and Li, Y}, title = {Metagenomic Analysis of Gut Microbiome of Persistent Pulmonary Hypertension of the Newborn.}, journal = {Cardiovascular toxicology}, volume = {25}, number = {1}, pages = {135-147}, pmid = {39680298}, issn = {1559-0259}, support = {2021YFQ0061//Technology Project of Sichuan Province of China/ ; 82270249//National Natural Science Foundation of China/ ; }, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; Infant, Newborn ; *Metagenomics ; Feces/microbiology ; *Persistent Fetal Circulation Syndrome/microbiology/diagnosis/genetics/physiopathology ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; Female ; Case-Control Studies ; Male ; Host-Pathogen Interactions ; Dysbiosis ; }, abstract = {Persistent pulmonary hypertension of the newborn (PPHN) is one of the most common diseases in the neonatal intensive care unit which severely affects neonatal survival. Gut microbes play an increasingly important role in human health, but there are rarely reported how gut microbiota contribute to PPHN. In our study, the metagenomic sequencing of feces from 12 PPHN's neonates and 8 controls were performed to expose the relation between neonatal gut microbes and PPHN disease. Firstly, we found that the abundance of Actinobacteria, Proteobacteria, Bacteroidetes were significantly increased in PPHN compared with controls, but the Firmicutes components was reduced. And some pathogenic strains (like Vibrio metschnikovii) were significantly enriched in the PPHN compared with controls. Secondly, functional annotation of genes found that PPHN up-regulated transmembrane transport, but down-regulated ribosome and ATP binding. Lastly, microbial metabolic pathway enrichment analysis indicated that some metabolic pathway in PPHN were conflicting and contradictory, showed that an abnormally increased metabolism, disturbed protein synthesis and genomic instability in the PPHN neonate. Our results contribute to understanding the changes in the species and function of gut microbiota in PPHN, thus providing a theoretical basis for the explanation and treatment of PPHN.}, }
@article {pmid39679737, year = {2024}, author = {Zhao, H and Wang, T}, title = {Debiased high-dimensional regression calibration for errors-in-variables log-contrast models.}, journal = {Biometrics}, volume = {80}, number = {4}, pages = {}, doi = {10.1093/biomtc/ujae153}, pmid = {39679737}, issn = {1541-0420}, mesh = {Humans ; Calibration ; *Models, Statistical ; Gastrointestinal Microbiome ; Computer Simulation ; Regression Analysis ; Bias ; Linear Models ; Biometry/methods ; Data Interpretation, Statistical ; Metagenomics/methods/statistics &amp; numerical data ; }, abstract = {Motivated by the challenges in analyzing gut microbiome and metagenomic data, this work aims to tackle the issue of measurement errors in high-dimensional regression models that involve compositional covariates. This paper marks a pioneering effort in conducting statistical inference on high-dimensional compositional data affected by mismeasured or contaminated data. We introduce a calibration approach tailored for the linear log-contrast model. Under relatively lenient conditions regarding the sparsity level of the parameter, we have established the asymptotic normality of the estimator for inference. Numerical experiments and an application in microbiome study have demonstrated the efficacy of our high-dimensional calibration strategy in minimizing bias and achieving the expected coverage rates for confidence intervals. Moreover, the potential application of our proposed methodology extends well beyond compositional data, suggesting its adaptability for a wide range of research contexts.}, }
@article {pmid39679708, year = {2025}, author = {Liu, Z and Jiang, C and Yin, Z and Ibrahim, IA and Zhang, T and Wen, J and Zhou, L and Jiang, G and Li, L and Yang, Z and Huang, Y and Yang, Z and Gu, Y and Meng, D and Yin, H}, title = {Ecological features of microbial community linked to stochastic and deterministic assembly processes in acid mine drainage.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0102824}, pmid = {39679708}, issn = {1098-5336}, support = {2023YFE0114500//MOST | National Key Research and Development Program of China (NKPs)/ ; 92351303//MOST | National Natural Science Foundation of China (NSFC)/ ; BX20230437//Postdoctoral Fellowship Program of CPSF/ ; }, mesh = {*Microbiota ; *Bacteria/genetics/classification/isolation &amp; purification ; *Mining ; Phylogeny ; Acids ; Stochastic Processes ; }, abstract = {UNLABELLED: Ecological processes greatly shape microbial community assembly, but the driving factors remain unclear. Here, we compiled a metagenomic data set of microbial communities from global acid mine drainage (AMD) and explored the ecological features of microbial community linked to stochastic and deterministic processes from the perspective of species niche position, interaction patterns, gene functions, and viral infection. Our results showed that dispersal limitation (DL) (48.5%~93.5%) dominated the assembly of phylogenetic bin in AMD microbial community, followed by homogeneous selection (HoS) (3.1%~39.2%), heterogeneous selection (HeS) (1.4%~22.2%), and drift (DR) (0.2%~2.7%). The dominant process of dispersal limitation was significantly influenced by niche position in temperature (r = -0.518, P = 0.007) and dissolved oxygen (r = 0.471, P = 0.015). Network stability had a significantly negative correlation with the relative importance of dispersal limitation, while it had a positive correlation with selection processes, implying changes in network properties could be mediated by ecological processes. Furthermore, we found that ecological processes were mostly related to the gene functions of energy production and conversion (C), and amino acid transport and metabolism (E). Meanwhile, our results showed that the number of proviruses and viral genes involved in arsenic (As) resistance is negatively associated with the relative importance of ecological drift in phylogenetic bin assembly, implying viral infection might weaken ecological drift. Taken together, these results highlight that ecological processes are associated with ecological features at multiple levels, providing a novel insight into microbial community assembly in extremely acidic environments.<br><br>IMPORTANCE: Unraveling the forces driving community assemblage is a core issue in microbial ecology, but how ecological constraints impose stochasticity and determinism remains unknown. This study presents a comprehensive investigation to uncover the association of ecological processes with species niche position, interaction patterns, microbial metabolisms, and viral infections, which provides novel insights into community assembly in extreme environments.}, }
@article {pmid39679619, year = {2024}, author = {Steinbach, E and Belda, E and Alili, R and Adriouch, S and Dauriat, CJG and Donatelli, G and Dumont, JL and Pacini, F and Tuszynski, T and Pelloux, V and Jacques, F and Creusot, L and Coles, E and Taillandier, P and Vazquez Gomez, M and Masi, D and Mateo, V and André, S and Kordahi, M and Rouault, C and Zucker, JD and Sokol, H and Genser, L and Chassaing, B and Le Roy, T and Clément, K}, title = {Comparative analysis of the duodenojejunal microbiome with the oral and fecal microbiomes reveals its stronger association with obesity and nutrition.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2405547}, pmid = {39679619}, issn = {1949-0984}, mesh = {Humans ; *Obesity/microbiology ; *Feces/microbiology ; Female ; Male ; Middle Aged ; *Gastrointestinal Microbiome ; Adult ; *Duodenum/microbiology ; *Bacteria/classification/isolation &amp; purification/genetics/metabolism ; Jejunum/microbiology ; Mouth/microbiology ; Nutritional Status ; }, abstract = {The intestinal microbiota is increasingly recognized as a crucial player in the development and maintenance of various chronic conditions, including obesity and associated metabolic diseases. While most research focuses on the fecal microbiota due to its easier accessibility, the small intestine, as a major site for nutrient sensing and absorption, warrants further investigation to determine its microbiota composition and functions. Here, we conducted a clinical research project in 30 age- and sex-matched participants with (n = 15) and without (n = 15) obesity. Duodenojejunal fluid was obtained by aspiration during endoscopy. Phenotyping included clinical variables related to metabolic status, lifestyle, and psychosocial factors using validated questionnaires. We performed metagenomic analyses of the oral, duodenojejunal, and fecal microbiome, alongside metabolomic data from duodenojejunal fluid and feces, integrating these data with clinical and lifestyle information. Our results highlight significant associations between duodenojejunal microbiota composition and usual dietary intake, as well as clinical phenotypes, with larger effect sizes than the associations between these variables and fecal microbiota. Notably, we found that the duodenojejunal microbiota of patients with obesity exhibited higher diversity and showed distinct differences in the abundance of several duodenojejunal microbiota species compared with individuals without obesity. Our findings support the relevance of studying the role of the small intestinal microbiota in the pathogenesis of nutrition-related diseases.}, }
@article {pmid39679617, year = {2024}, author = {McAdams, ZL and Gustafson, KL and Russell, AL and Self, R and Petry, AL and Lever, TE and Ericsson, AC}, title = {Supplier-origin gut microbiomes affect host body weight and select autism-related behaviors.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2385524}, pmid = {39679617}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome ; Animals ; Mice ; Male ; *Autism Spectrum Disorder/microbiology ; *Body Weight ; Female ; *Behavior, Animal ; Disease Models, Animal ; Humans ; Brain-Gut Axis/physiology ; Bacteria/classification/isolation &amp; purification/genetics ; Autistic Disorder/microbiology/psychology ; }, abstract = {Autism spectrum disorders (ASD) are complex human neurodiversities increasing in prevalence within the human population. In search of therapeutics to improve quality-of-life for ASD patients, the gut microbiome (GM) has become a promising target as a growing body of work supports roles for the complex community of microorganisms in influencing host behavior via the gut-brain-axis. However, whether naturally-occurring microbial diversity within the host GM affects these behaviors is often overlooked. Here, we applied a model of population-level differences in the GM to a classic ASD model - the BTBR T[+] Itpr3[tf]/J mouse - to assess how complex GMs affect host behavior. Leveraging the naturally occurring differences between supplier-origin GMs, our data demonstrate that differing, complex GMs selectively effect host ASD-related behavior - especially neonatal ultrasonic communication - and reveal a male-specific effect on behavior not typically observed in this strain. We then identified that the body weight of BTBR mice is influenced by the postnatal GM which was potentially mediated by microbiome-dependent effects on energy harvest in the gut. These data provide insight into how variability within the GM affects host behavior and growth, thereby emphasizing the need to incorporate microbial diversity within the host GM as an experimental factor in biomedical research.}, }
@article {pmid39679616, year = {2024}, author = {Seki, D and Kirkegaard, R and Osvatic, J and Hausmann, B and Séneca, J and Pjevac, P and Berger, A and J Hall, L and Wisgrill, L and Berry, D}, title = {Gut microbiota genome features associated with brain injury in extremely premature infants.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2410479}, pmid = {39679616}, issn = {1949-0984}, support = {/WT_/Wellcome Trust/United Kingdom ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; Infant, Newborn ; *Infant, Extremely Premature ; *Brain Injuries/microbiology/genetics ; *Feces/microbiology ; Female ; Male ; Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Genome, Bacterial ; Cohort Studies ; }, abstract = {Severe brain damage is common among premature infants, and the gut microbiota has been implicated in its pathology. Although the order of colonizing bacteria is well described, the mechanisms underlying aberrant assembly of the gut microbiota remain elusive. Here, we employed long-read nanopore sequencing to assess abundances of microbial species and their functional genomic potential in stool samples from a cohort of 30 extremely premature infants. We identify several key microbial traits significantly associated with severe brain damage, such as the genomic potential for nitrate respiration and iron scavenging. Members of the Enterobacteriaceae were prevalent across the cohort and displayed a versatile metabolic potential, including pathogenic and nonpathogenic traits. Predominance of Enterobacter hormaechei and Klebsiella pneumoniae were associated with an overall loss of genomic functional redundancy as well as poor neurophysiological outcome. These findings reveal microbial traits that may be involved in exacerbating brain injury in extremely premature infants and provide suitable targets for therapeutic interventions.}, }
@article {pmid39678952, year = {2024}, author = {Sinha, T and Talukdar, NC}, title = {Phylum Level Diversity of Plant Interior Bacteria in Seeds, Supernatant and Pellet Phases of Seed Suspension of Mustard Plant.}, journal = {Indian journal of microbiology}, volume = {64}, number = {4}, pages = {1587-1597}, pmid = {39678952}, issn = {0046-8991}, abstract = {Our previous study explored the bacterial endophytic diversity in a certain quantity of mustard seeds using culture dependent method by development of new isolation strategies. No bacterial colony was initially observed in supernatant obtained after centrifugation of mustard seed suspension. This was later overcome by usage of surfactant whereas pellet part showed presence of bacterial colonies on media. In our present study, presence of bacteria was examined in supernatant and whether the diversity was similar to that of pellet and seeds by culture independent approach. In addition, growth of bacterial colonies on media is explained using GC-MS. In this study, Proteobacteria was the dominant bacterial phyla followed by Firmicutes in pellet, supernatant and seed. This indicated that bacteria were present in supernatant but may not be viable when plated on media. This is either due to antimicrobial compounds or oil-imposed difficulty during their isolation which might have hindered their survival. GC-MS study revealed the presence of compounds with antimicrobial property as suggested by previous literature. Our research conducts fundamental investigations to address the primary objective of understanding the bacterial diversity in mustard seed, pellet, and supernatant. Further research using workflows of metagenomics and metabolomics approaches can enrich our understanding ofthe diversity of microorganisms in seeds.}, }
@article {pmid39676101, year = {2024}, author = {Wang, C and Zhang, C and He, S and Wang, Q and Gao, H}, title = {The microbiome alterations of supragingival plaque among adolescents using clear aligners: a metagenomic sequencing analysis.}, journal = {Progress in orthodontics}, volume = {25}, number = {1}, pages = {48}, pmid = {39676101}, issn = {2196-1042}, support = {PY2023038//Science research cultivation program of stomatological hospital, Southern medical university/ ; PY2023043//Science research cultivation program of stomatological hospital, Southern medical university/ ; B2023274//Guangdong Medical Research Fund/ ; B2022013//Guangdong Medical Research Fund/ ; }, mesh = {Humans ; Adolescent ; *Dental Plaque/microbiology ; Male ; *Microbiota ; Female ; *Biofilms ; Child ; *Capnocytophaga ; Neisseria ; Metagenomics/methods ; Virulence Factors/genetics ; }, abstract = {BACKGROUND: White spot lesions (WSLs) may develop in adolescents undergoing clear aligner (CA) therapy with poor oral hygiene. The specific effects of CAs on the microbial composition and functional characteristics of supragingival plaques remain unclear. The present study investigated the shift in the supragingival microbial community induced by CAs in adolescents through metagenomic technology.<br><br>METHODS: Fifteen adolescents (12-15 years old) with Invisalign appliances were recruited. Supragingival plaque specimens were obtained twice, before treatment (T1) and three months after treatment (T2). All the bacterial plaque specimens were analyzed for microbial communities and functions using metagenomic analyses.<br><br>RESULTS: A total of 2,840,242,722 reads disclosed 180 phyla, 3,975 genera, and 16,497 microbiome species. During the first three months, the microbial community was relatively stable. The genus level revealed a higher relative abundance of Capnocytophaga, Neisseria, and Arachnia in the T2 period. Furthermore, the functional analysis suggested that the relative abundances of folate biosynthesis, biotin metabolism and biofilm formation-vibrio cholerae were increased in the T2 period compared to the T1 period. Finally, virulence factor analysis demonstrated that the relative abundance of genes associated with type IV pili (VF0082) and polar flagella (VF0473) was higher in the T2 period than in the T1 period.<br><br>CONCLUSION: In adolescents undergoing CA therapy with poor plaque control, caries progresses quickly within three months and noticeable WSLs develop on the tooth surface. Although the microbial community remained relatively steady and CA therapy did not cause significant changes in the overall functional gene composition in the first three months, virulence factors, including type IV pili and flagella, were more abundant and actively contributed to microorganism adhesion and biofilm formation.}, }
@article {pmid39675462, year = {2025}, author = {Wang, H and Liu, Q and Abouelfetouh, MM and Li, H and Zhu, H and Zhu, C and Kiani, FA and Ding, Y}, title = {The role of the hypothalamus-gut microbiota in the pathogenesis of periparturient fatty liver disease in dairy cows.}, journal = {Veterinary journal (London, England : 1997)}, volume = {309}, number = {}, pages = {106290}, doi = {10.1016/j.tvjl.2024.106290}, pmid = {39675462}, issn = {1532-2971}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; Cattle ; Female ; *Cattle Diseases/microbiology/etiology ; *Fatty Liver/veterinary/microbiology ; *Hypothalamus/metabolism ; Peripartum Period ; Liver ; }, abstract = {During the periparturient period, dairy cows experience negative energy balance due to reduced feed intake, leading to adipose tissue breakdown, liver damage, and fat accumulation. This study examined the gut-liver-brain axis to explore the link between fatty liver disease, changes in hypothalamic appetite-related neurons, and microbiome shifts in dairy cows. Thirty cows were monitored, with daily DMI recordings and blood sampling. Postpartum brain, liver, and ileal contents were collected from 10 selected cows, divided into two groups: H-DMI (slight DMI decrease) and L-DMI (severe DMI decrease). The L-DMI group of cows exhibited higher plasma NEFA, BHBA, ALT, and AST levels, along with severe hepatic steatosis and lipid accumulation. Transcriptome sequencing of the hypothalamic arcuate nucleus (ARC) revealed decreased expression of Hypocretin Neuropeptide Precursor (HCRT), orexin-A (OX-A), Orexin Receptor Type 1 (OX1R), and Cannabinoid Receptor 1 (CB1) in the L-DMI group, while Pro-opiomelanocortin (POMC) and Melanocortin 4 Receptor (MC4R) expression increased. Metagenomic analysis of ileal contents showed reduced abundance of Ruminococcus spp. in the L-DMI group, which may be associated with fatty liver disease (FL). Integrated omics analysis showed that increased MC4R expression was correlated with the elevated abundance of bacteria such as Akkermansia glycaniphila, and reduced abundance of species such as Methanobrevubacter thaueri and Ruminococcus spp. Decreased HCRT expression was also linked to Akkermansia glycaniphila. In conclusion, these changes may affect DMI through the OX-A/POMC pathway, with neurological and gut microbiome alterations potentially leading to appetite suppression, negative energy balance, and the development of fatty liver disease.}, }
@article {pmid39675450, year = {2025}, author = {Ye, X and Niu, X and Li, L and Lv, M and Zhang, D and Chen, D and Line, Y and Yang, Z}, title = {Insights into the impact of 6PPD-Q and 6PPD on nitrogen metabolism and microbial community in the anammox system.}, journal = {Environmental research}, volume = {266}, number = {}, pages = {120485}, doi = {10.1016/j.envres.2024.120485}, pmid = {39675450}, issn = {1096-0953}, mesh = {*Nitrogen/metabolism ; *Water Pollutants, Chemical/toxicity ; *Phenylenediamines/toxicity ; *Bacteria/drug effects/metabolism ; *Microbiota/drug effects ; Wastewater ; Benzoquinones ; }, abstract = {N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD) is an antioxidant commonly used in tire manufacturing, and its release into the environment has significantly increased due to rapid urbanization. When subjected to ozonation, 6PPD converts into the harmful pollutant 6PPD quinone (6PPDQ). These substances enter wastewater treatment plants (WWTPs) via stormwater runoff and pipelines, posing significant risks to the functional microorganisms. Anammox, a strictly controlled and sensitive microbial nitrogen removal process, is especially susceptible to the effects of the pollutants. This study investigates the comprehensive impact of 6PPD-Q and 6PPD on anammox communities based on characterization analysis and metagenomics. At environmental concentrations, 6PPD-Q at 200 ng/L-1000 ng/L led to the disintegration of anammox granules. Extended exposure to both 6PPD-Q and 6PPD significantly reduces the population of anammox bacteria (AnAOB). By utilizing organic matter from dead cells and incoming carbonate as a carbon source, the system evolved into a nitrogen metabolism network primarily focused on denitrification and dissimilatory nitrate reduction to ammonium (DNRA). This transformation was accompanied by a reshuffling of the microbial community and associated genes, resulting in an accumulation of NH4[+]-N. These findings underscore the toxicity of 6PPD-Q and 6PPD to anammox and stress the importance of incorporating 6PPD into regulatory and preventive strategies.}, }
@article {pmid39675442, year = {2025}, author = {Tian, C and Yang, Q and Lv, H and Yue, F}, title = {Integrative analysis of gut microbiota and fecal metabolites in cynomolgus monkeys with spontaneous type 2 diabetes mellitus.}, journal = {Microbial pathogenesis}, volume = {199}, number = {}, pages = {107228}, doi = {10.1016/j.micpath.2024.107228}, pmid = {39675442}, issn = {1096-1208}, mesh = {Animals ; *Feces/chemistry/microbiology ; *Diabetes Mellitus, Type 2/microbiology/metabolism ; *Gastrointestinal Microbiome ; Macaca fascicularis ; Metabolomics/methods ; Metagenomics ; Male ; Fatty Acids, Volatile/analysis/metabolism ; Dysbiosis/microbiology ; Biomarkers ; Bacteria/classification/genetics/isolation &amp; purification ; Metabolome ; Disease Models, Animal ; }, abstract = {BACKGROUND: Accumulating evidence suggests that gut microbiota (GM) is clearly associated with the pathogenesis of type 2 diabetes mellitus (T2DM). However, the underlying mechanism of GM dysbiosis participates the onset of T2DM is not fully understood. The spontaneous T2DM cynomolgus monkeys are a powerful model for understanding the pathological mechanism of T2DM.<br><br>METHODS: Fecal samples were collected from 7 spontaneous T2DM cynomolgus monkeys and 7 healthy controls matched with similar age for multi-omics analysis, including shotgun metagenomic sequencing, untargeted metabolomics profiling, and targeted metabolomics focusing on short chain fatty acids (SCFAs). Lastly, the correlation network between differential gut microbial species and fecal metabolites was performed to explore the potential biomarkers of T2DM.<br><br>RESULTS: We found that 17 low-abundance species showed significant differences between the two groups. Analysis of gut microbial functions revealed that 16 KEGG pathways and 51 KEGG modules were significantly different in the two groups. Meanwhile, 276 fecal DEMs were identified, and these DEMs were enriched in the KEGG pathways, including Nucleotide metabolism, ABC transporters, Purine metabolism and so on. Lastly, Spearman correlation network analysis showed that the species of Anaerostipes_hadrus and Lachnoanaerobaculum_umeaense, and the metabolites including Glycerophospho-N-palmitoyl ethanolamine and 2-Hydroxycinnamic acid might serve as potential biomarkers of T2DM.<br><br>CONCLUSIONS: Our study provides novel insights into specific alterations in the GM composition, gene functions, and fecal metabolic profiles in spontaneous T2DM cynomolgus monkeys.}, }
@article {pmid39675160, year = {2025}, author = {Yuan, X and Zhang, Y and Pang, L and Zhang, X and Kang, Y and Hei, G and Li, X and Song, X}, title = {Insulin resistance links dysbiosis of gut microbiota with cognitive impairment in first-episode drug-naïve schizophrenia.}, journal = {Psychoneuroendocrinology}, volume = {172}, number = {}, pages = {107255}, doi = {10.1016/j.psyneuen.2024.107255}, pmid = {39675160}, issn = {1873-3360}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Insulin Resistance/physiology ; Male ; Female ; *Dysbiosis/microbiology/metabolism/complications ; *Schizophrenia/microbiology/metabolism/complications/physiopathology ; Adult ; *Cognitive Dysfunction/microbiology/metabolism/physiopathology ; Case-Control Studies ; Blood Glucose/metabolism ; Feces/microbiology ; Metagenomics/methods ; Young Adult ; RNA, Ribosomal, 16S ; }, abstract = {This study aimed to explore the relationship among gut microbiota imbalance, the homeostasis model of assessment of insulin resistance (HOMA-IR) and cognitive impairments in patients with schizophrenia (SCZ). We conducted a case-control study involving 189 first-episode, drug-naïve SCZ patients and 115 healthy controls (HCs). Main methods adopted included metagenomics analysis, glucose metabolism assessment, and cognitive function evaluation using the MATRICS Consensus Cognitive Battery (MCCB). Fecal microbiota composition was analyzed via high-throughput sequencing of 16S ribosomal RNA. Patients with SCZ showed a higher likelihood of developing IR (23 %), compared to HCs (12 %). The IR group exhibited significantly higher levels of fasting blood glucose (FBG), fasting insulin (FINS), HOMA-IR, and homeostasis model assessment-β (HOMA-β), while showing lower insulin sensitivity index (ISI) levels (all p < 0.05). Patients with IR demonstrated lower scores in working memories (WM), verbal learning (HVLT) and reasoning and problem solving (RPS), compared to those without IR. Additionally, microbiota analysis revealed that IR patients had higher abundance of Negativicutes, Streptococcaceae, Enterobacteriaceae, Lachnoclostridium, Dialister, Klebsiella, and Enterobacter, and lower abundance of Flavonifractor and Rikenellaceae. Notably, Negativicutes, Streptococcaceae, Lachnoclostridium, Flavonifractor, and Rikenellaceae were shared between SCZ and IR conditions. Mediation analysis indicated that the relative abundance of Streptococcaceae have an indirect effect on WM through HOMA-IR (β=-0.148, SE=0.067, 95 %CI=-0.280 to -0.020). The study suggests that IR may play a mediating role in the relationship between gut microbiota dysbiosis and cognitive impairments in patients with SCZ, which could point to potential new avenues for therapeutic interventions.}, }
@article {pmid39674265, year = {2024}, author = {Ravishankar, S and Perez, V and Davidson, R and Roca-Rada, X and Lan, D and Souilmi, Y and Llamas, B}, title = {Filtering out the noise: metagenomic classifiers optimize ancient DNA mapping.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {1}, pages = {}, pmid = {39674265}, issn = {1477-4054}, support = {CE170100015//Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage/ ; GA204260//NHMRC SYNERGY/ ; //Australian Government Research Training Program Scholarship/ ; //Portuguese National Funds/ ; }, mesh = {*DNA, Ancient/analysis ; *Metagenomics/methods ; *Sequence Analysis, DNA/methods ; Humans ; High-Throughput Nucleotide Sequencing/methods ; Metagenome ; Workflow ; DNA Contamination ; }, abstract = {Contamination with exogenous DNA presents a significant challenge in ancient DNA (aDNA) studies of single organisms. Failure to address contamination from microbes, reagents, and present-day sources can impact the interpretation of results. Although field and laboratory protocols exist to limit contamination, there is still a need to accurately distinguish between endogenous and exogenous data computationally. Here, we propose a workflow to reduce exogenous contamination based on a metagenomic classifier. Unlike previous methods that relied exclusively on DNA sequencing reads mapping specificity to a single reference genome to remove contaminating reads, our approach uses Kraken2-based filtering before mapping to the reference genome. Using both simulated and empirical shotgun aDNA data, we show that this workflow presents a simple and efficient method that can be used in a wide range of computational environments-including personal machines. We propose strategies to build specific databases used to profile sequencing data that take into consideration available computational resources and prior knowledge about the target taxa and likely contaminants. Our workflow significantly reduces the overall computational resources required during the mapping process and reduces the total runtime by up to ~94%. The most significant impacts are observed in low endogenous samples. Importantly, contaminants that would map to the reference are filtered out using our strategy, reducing false positive alignments. We also show that our method results in a negligible loss of endogenous data with no measurable impact on downstream population genetics analyses.}, }
@article {pmid39674156, year = {2025}, author = {Erkorkmaz, BA and Zeevi, D and Rudich, Y}, title = {Dust storm-driven dispersal of potential pathogens and antibiotic resistance genes in the Eastern Mediterranean.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {178021}, doi = {10.1016/j.scitotenv.2024.178021}, pmid = {39674156}, issn = {1879-1026}, mesh = {*Dust/analysis ; *Drug Resistance, Microbial/genetics ; *Air Microbiology ; *Environmental Monitoring ; Mediterranean Region ; Microbiota ; }, abstract = {The atmosphere hosts a microbiome that connects distant ecosystems yet remains relatively unexplored. In this study, we tested the hypothesis that dust storms enhance the spread of pathogenic microorganisms and whether these microorganisms carry antibiotic resistance and virulence-related genes in the Eastern Mediterranean. We collected air samples during a seasonal transition period, capturing data from 13 dusty days originating from Middle Eastern sources, including the Saharan Desert, Iraq, Iran, and Saudi Arabia, and 32 clear days, with temperatures ranging from 16.5 to 27.1 °C. Using metagenomic analysis, we identified several facultative pathogens like Klebsiella pneumoniae, Stenotrophomonas maltophilia, and Aspergillus fumigatus, which are linked to human respiratory diseases, and others like Zymoseptoria tritici, Fusarium poae, and Puccinia striiformis, which are harmful to wheat. The abundance of these pathogens increased during dust storms and with rising temperatures. Although we did not find strong evidence that these species harbored antibiotic resistance or virulence-related genes, which could be linked to their pathogenic potential, dust storms transported up to 125 times more total antibiotic resistance genes, as measured by RPKM abundance, compared to clear conditions. These levels during dust storms far exceeded those found in other ecosystems. While further research is needed to determine whether dust storms and temperature variations pose an immediate threat to public health and the environment, our findings underscore the importance of continuous monitoring of atmospheric microbiomes. This surveillance is crucial for assessing potential risks to human health and ecosystem stability, particularly in the face of accelerating global climate change.}, }
@article {pmid39673746, year = {2025}, author = {Quraishi, MN and Cheesbrough, J and Rimmer, P and Mullish, BH and Sharma, N and Efstathiou, E and Acharjee, A and Gkoutus, G and Patel, A and Marchesi, JR and Camuzeaux, S and Chappell, K and Valdivia-Garcia, MA and Ferguson, J and Brookes, MJ and Walmsley, M and Rossiter, AE and van Schaik, W and McInnes, RS and Cooney, R and Trauner, M and Beggs, AD and Iqbal, TH and Trivedi, PJ}, title = {Open Label Vancomycin in Primary Sclerosing Cholangitis-Inflammatory Bowel Disease: Improved Colonic Disease Activity and Associations With Changes in Host-Microbiome-Metabolomic Signatures.}, journal = {Journal of Crohn's &amp; colitis}, volume = {19}, number = {2}, pages = {}, pmid = {39673746}, issn = {1876-4479}, support = {/MRC_/Medical Research Council/United Kingdom ; MC_PC_12025//National Institute for Health Research/ ; //UK Consortium for MetAbolic Phenotyping/ ; //National Institute for Health Research/ ; //Imperial Biomedical Research Centre/ ; }, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Administration, Oral ; *Anti-Bacterial Agents/therapeutic use/administration &amp; dosage ; *Cholangitis, Sclerosing/complications/drug therapy/microbiology ; *Colitis/drug therapy/microbiology ; Colon/pathology ; Feces/chemistry/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Inflammatory Bowel Diseases/drug therapy/complications/microbiology ; Leukocyte L1 Antigen Complex/analysis ; Metabolomics ; Remission Induction ; *Vancomycin/therapeutic use/administration &amp; dosage ; }, abstract = {BACKGROUND: We conducted a single-arm interventional study, to explore mucosal changes associated with clinical remission under oral vancomycin (OV) treatment, in primary sclerosing cholangitis-associated inflammatory bowel disease (PSC-IBD); NCT05376228.<br><br>METHODS: Fifteen patients with PSC and active colitis (median fecal calprotectin 459 &#xb5;g/g; median total Mayo score 5) were treated with OV (125&#xa0;mg QID) for 4 weeks and followed-up for a further 4 weeks of treatment withdrawal (8 weeks, end-of-study). Colonic biopsies were obtained at baseline and Week 4. Clinical assessments, and serum and stool samples (metagenomics, metatranscriptomics, and metabolomics) were collected at Weeks 0, 2, 4, and 8. The primary efficacy outcome measure was the induction of clinical remission.<br><br>RESULTS: Oral vancomycin resulted in clinical remission in 12/15 patients and significant reductions in fecal calprotectin. Oral vancomycin was associated with reduced abundances of Lachnospiraceae, genera Blautia and Bacteroides; and enrichment of Enterobacteriaceae, and genera Veillonella, Akkermansia, and Escherichia. Oral vancomycin treatment was associated with the downregulation of multiple metatranscriptomic pathways (including short-chain fatty acid [SCFA] metabolism and bile acid [BA] biotransformation), along with host genes and multiple pathways involved in inflammatory responses and antimicrobial defence; and an upregulation of genes associated with extracellular matrix repair. Oral vancomycin use resulted in the loss of specific fecal SCFAs and secondary BAs, including lithocholic acid derivatives. Colitis activity relapsed following OV withdrawal, with host mucosal and microbial changes trending toward baseline.<br><br>CONCLUSIONS: Four weeks of OV induces remission in PSC-IBD activity, associated with a reduction in gut bacterial diversity and compositional changes relating to BA and SCFA homeostasis.}, }
@article {pmid39673707, year = {2024}, author = {Huang, KD and Müller, M and Sivapornnukul, P and Bielecka, AA and Amend, L and Tawk, C and Lesker, TR and Hahn, A and Strowig, T}, title = {Dietary selective effects manifest in the human gut microbiota from species composition to strain genetic makeup.}, journal = {Cell reports}, volume = {43}, number = {12}, pages = {115067}, doi = {10.1016/j.celrep.2024.115067}, pmid = {39673707}, issn = {2211-1247}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Diet ; Adult ; Male ; Bacteria/genetics/classification ; Female ; Genetic Variation ; Middle Aged ; }, abstract = {Diet significantly influences the human gut microbiota, a key player in health. We analyzed shotgun metagenomic sequencing data from healthy individuals with long-term dietary patterns-vegan, flexitarian, or omnivore-and included detailed dietary surveys and blood biomarkers. Dietary patterns notably affected the bacterial community composition by altering the relative abundances of certain species but had a minimal impact on microbial functional repertoires. However, diet influenced microbial functionality at the strain level, with diet type linked to strain genetic variations. We also found molecular signatures of selective pressure in species enriched by specific diets. Notably, species enriched in omnivores exhibited stronger positive selection, such as multiple iron-regulating genes in the meat-favoring bacterium Odoribacter splanchnicus, an effect that was also validated in independent cohorts. Our findings offer insights into how diet shapes species and genetic diversity in the human gut microbiota.}, }
@article {pmid39672497, year = {2025}, author = {Zhou, L and Zhang, L and Dang, R and Han, G and Liu, J and Zhou, M and Xiao, L}, title = {Microbiota-induced asymmetry in coastal methane emission potential under experimental precipitation gradients.}, journal = {Environmental research}, volume = {266}, number = {}, pages = {120601}, doi = {10.1016/j.envres.2024.120601}, pmid = {39672497}, issn = {1096-0953}, mesh = {*Methane/analysis/metabolism ; *Microbiota ; China ; *Rain ; Wetlands ; *Soil Microbiology ; *Air Pollutants/analysis ; }, abstract = {Climate models predict that the frequency and intensity of extreme precipitation events will increase globally. Despite carbon budget in coastal wetlands is known to be sensitive to precipitation variability, in where CH4 productions and potential mechanisms remain poorly understood. We investigated CH4 emission potential and its drivers after 7-year of field experiments with five precipitation gradients (-60%, -40%, ambient condition, +40%, +60%) in Yellow River Delta, China. The response of CH4 emission potential to precipitation gradients exhibited significant asymmetry, with the highest emission potential occurring under +40% precipitation. [13]C-isotope tracing experiment discovered the primary contribution of acetoclastic methanogenic pathway. +40% precipitation significantly improved the accumulation of aboveground biomass, soil organic carbon and total nitrogen. Microbial community abundance, but not composition, referring to metagenome-assembled genomes also actively responded to precipitation changes. For example, +40% precipitation increased the relative abundance of Methanosarcinia and Methanobacteria. Furthermore, CH4 emission potential was also promoted by higher microbial enzyme activity. Collectively, CH4 emission potential in response to 7-year experimental precipitations was regulated by microbiota-driven, showing obvious asymmetry.}, }
@article {pmid39671945, year = {2025}, author = {Justine, EE and Lee, HJ and Jung, KH and Lee, YS and Kim, YJ}, title = {Methane emission mitigation of Paenibacillus yonginensis DCY84[T] incorporated with silicate on paddy rice (Oryzae sativa L.) plantation revealed in soil microbiome profiling.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {177996}, doi = {10.1016/j.scitotenv.2024.177996}, pmid = {39671945}, issn = {1879-1026}, mesh = {*Oryza/growth &amp; development ; *Methane/metabolism/analysis ; *Soil Microbiology ; *Paenibacillus/physiology ; *Microbiota ; *Silicates ; Biodegradation, Environmental ; Agriculture/methods ; Greenhouse Gases/analysis ; }, abstract = {Anthropogenic methane emissions from paddy cultivation contribute to greenhouse gas levels owing to the anaerobic conditions in flooded rice fields, which promotes the activity of methanogenic bacteria. This study explored bioremediation strategies to mitigate methane release through the application of plant growth-promoting rhizobacteria combined with silicate in rice cultivation. Rice seeds were coated with Paenibacillus yonginensis DCY84[T], with and without the addition of silicate, prior to sowing. Results revealed notable reduction in methane flux during the peak growth stage of rice in seeds treated with DCY84[T] (27.215 ± 1.975 mg m[-2] h[-1]), with a further reduction observed when silicate was also applied (23.592 ± 3.112 mg m[-2] h[-1]), compared to untreated seeds (37.305 ± 2.990 mg m[-2] h[-1]). Additionally, treatment with DCY84[T] (28.24 ± 0.55 g) resulted in an increase in rice yield (p < 0.05), as evidenced by a greater 1000-grain weight compared to both the control group (26.91 ± 0.09 g) and the application of silicate (27.37 ± 0.57 g). The beta diversity of the soil microbial community highlighted distinct differences between the treated and control groups, indicating DCY84[T] inoculation with or without silicate altered the soil microbial structure. Particularly, the treated groups showed dominance of the phylum Proteobacteria, especially the classes Alphaproteobacteria and Deltaproteobacteria. Furthermore, the addition of silicate to DCY84[T]-coated rice seeds resulted in a higher abundance of bacterial families, such as Anaerolinaceae, Clostridiceae, and Nitrospirae which compete with methanogens for organic substrates, thereby reducing their methane production. Notably, the DCY84[T]-silicate treatment group showed higher levels of methane metabolism biomarkers such as formate dehydrogenase within the soil microbiome, which correlated with the observed reduction in methane emissions. These findings suggest that coating rice seeds with DCY84[T] and silicate prior to sowing effectively mediates methane production and release during rice cultivation by promoting beneficial soil bacterial communities.}, }
@article {pmid39671861, year = {2025}, author = {Buzzanca, D and Giordano, M and Chiarini, E and Ferrocino, I and Cocolin, L and Zeppa, G and Alessandria, V}, title = {Delving into Roccaverano PDO cheese: A comprehensive examination of microbial diversity and flavour profiles compared to non-PDO cheeses.}, journal = {International journal of food microbiology}, volume = {429}, number = {}, pages = {111014}, doi = {10.1016/j.ijfoodmicro.2024.111014}, pmid = {39671861}, issn = {1879-3460}, mesh = {*Cheese/microbiology ; *Volatile Organic Compounds/analysis ; *Taste ; Italy ; *Microbiota ; Humans ; Food Microbiology ; Flavoring Agents/analysis ; Bacteria/classification/isolation &amp; purification/genetics ; Fungi/isolation &amp; purification/classification/genetics ; Odorants/analysis ; Gas Chromatography-Mass Spectrometry ; }, abstract = {Roccaverano Protected Designation of Origin (PDO) is a fresh soft cheese produced in Roccaverano area (Italy). This study aimed to evaluate Roccaverano PDO microbiota, together with aromatic profile and sensory analysis to be compared with 15 non-PDO cheeses of the same type. Microbiota was evaluated through shotgun metagenomics sequencing, while GC-MS analysis was conducted to study volatile organic compounds (VOCs) presence and concentration. Sensory analyses were conducted through ONAF (Italian National Organization of Cheese Tasters) evaluation parameters followed by flash profile sensory analysis of selected cheeses. The results demonstrated Lactococcus lactis predominance in both non-PDO and PDO cheeses, while Streptococcus thermophilus was more abundant in non-PDO group. A higher abundance of Kluyveromyces lactis was observed in Roccaverano PDO, which exhibited greater fungal diversity compared to non-PDO cheeses. Metagenome-Assembled Genomes of 26 L. lactis and 19 Leuconostoc mesenteroides showed absence of significant differences in terms of average nucleotide identity and pangenomes partitions. The ONAF sensory evaluation demonstrated a higher average score of Roccaverano PDO group. Flash profile analysis demonstrated that lactic aroma/odour, acid, astringent, vegetal odour, exotic fruit and fermented aroma, hazelnut flavour and sweet were associated with high ONAF scores. The concentration of butanoic acid, 2-methyl-, ethyl ester and butanoic acid, 3-methyl- (sweat, acid, rancid related) were higher in PDO cheeses, while reads related to butanoate metabolism were less abundant compared to non-PDO samples. Several fungal species (included K. lactis) were associated with astringents, acid and chalky flavours. Roccaverano PDO demonstrates unique characteristics even maintaining a certain degree of variability between samples.}, }
@article {pmid39671837, year = {2025}, author = {Li, S and Zhen, Y and Chen, Y and Mi, T}, title = {Geochemical and microbial controls on methane distribution in coastal sediments: A case study from the Bohai and South Yellow Seas, China.}, journal = {Marine pollution bulletin}, volume = {211}, number = {}, pages = {117448}, doi = {10.1016/j.marpolbul.2024.117448}, pmid = {39671837}, issn = {1879-3363}, mesh = {*Methane/analysis ; *Geologic Sediments/chemistry/microbiology ; China ; *Environmental Monitoring ; Seawater/chemistry ; Oceans and Seas ; Microbiota ; }, abstract = {CH4 is among the most potent greenhouse gases. In this study, we investigated one of the important CH4 production hotspots, the continental margins. We examined the spatiotemporal distributions of CH4 in sediment cores from the Bohai and South Yellow Seas, China. Using real-time PCR and metagenomic sequencing, we analyzed the microbial communities related to CH4 production. Our results indicated that concentrations of CH4 generally increased with depth gradually, minimal seasonal variation observed between spring and summer. Notably, spatial heterogeneity, rather than temporal variation, was the predominant factor affecting CH4 distribution and methanogen community differences in sediments. Furthermore, the structure of microbial communities, in conjunction with environmental factors, significantly impacts potential CH4 production. These findings provide valuable insights into the mechanisms underlying methane production and its environmental controls in marine sediments.}, }
@article {pmid39670752, year = {2025}, author = {Peterson, D and Weidenmaier, C and Timberlake, S and Gura Sadovsky, R}, title = {Depletion of key gut bacteria predicts disrupted bile acid metabolism in inflammatory bowel disease.}, journal = {Microbiology spectrum}, volume = {13}, number = {2}, pages = {e0199924}, pmid = {39670752}, issn = {2165-0497}, mesh = {Humans ; *Inflammatory Bowel Diseases/microbiology/metabolism ; *Gastrointestinal Microbiome ; *Bile Acids and Salts/metabolism ; Feces/microbiology ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; Operon ; Metagenomics ; Female ; Clostridium/genetics/metabolism ; Male ; Metagenome ; Adult ; }, abstract = {The gut microbiome plays a key role in bile acid (BA) metabolism, where a diversity of metabolic products contribute to human health and disease. In particular, Inflammatory Bowel Disease (IBD) is characterized by a low concentration of secondary bile acids (SBAs), whose transformation from primary bile acids (PBAs) is an essential function performed solely by gut bacteria. BA-transformation activity mediated by the bile acid inducible (bai) operon has been functionally characterized in the genus Clostridium, and homologous bai gene sequences have been found in metagenome-assembled genomes (MAGs) belonging to other taxa in the human gut, but it is unclear which species of bai-carrying bacteria perform physiologically significant amounts of bile acid transformation in healthy and sick individuals. Here, we analyzed hundreds of stool samples with paired metagenomic and metabolomic data from IBD patients and controls and found that the abundance of the bai operon in metagenomic samples was highly predictive of that sample's high- or low-SBA metabolic state. We further found that bai genes from the Clostridium species best characterized as BA transformers were more prevalent in IBD patients than in non-IBD controls, while bai genes from uncharacterized taxa known only from MAGs were much more physiologically relevant in non-IBD samples. These un-isolated clades of BA-transforming bacteria merit further research; as beyond their prevalence in the human population, we found some cases in which they engrafted in IBD patients who had undergone fecal microbiota transplantation and experienced a clinical response.IMPORTANCEIn this paper, we identify specific bacteria that perform an important metabolic function in the human gut and demonstrate that in the guts of a large subset of patients with IBD, these bacteria are missing and the function is defective. This is a rare example where the correlation between the absence of specific bacteria and the dysfunction of metabolism is directly observed, not in mice nor in the lab, but in physiologic microbial communities in the human gut. Our results point to a path for studying how a small but important set of bacteria is affected by conditions in the IBD gut and perhaps to the development of interventions to mitigate the loss of these bacteria in IBD.}, }
@article {pmid39669269, year = {2024}, author = {Lee, KH and Kim, YO and Dho, SH and Yong, JJH and Oh, HS and Lee, JH and Yang, SJ and Cha, I and Chun, J and Lee, EH and Jeong, SJ and Woo, W and Choi, JP and Han, SH and Choi, GB and Huh, JR and Kim, LK and Song, YG}, title = {Altered gut microbiome in convalescent patients with coronavirus disease 2019.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1455295}, pmid = {39669269}, issn = {2235-2988}, mesh = {Humans ; *COVID-19/microbiology ; *Gastrointestinal Microbiome ; Male ; Female ; *Feces/microbiology/virology ; Middle Aged ; Prospective Studies ; *SARS-CoV-2/isolation &amp; purification ; Longitudinal Studies ; *RNA, Ribosomal, 16S/genetics ; Adult ; Severity of Illness Index ; Convalescence ; Bacteria/classification/isolation &amp; purification/genetics ; Aged ; }, abstract = {INTRODUCTION: Coronavirus disease 2019 (COVID-19) alters the gut microbiome. This study aimed to assess the association between the disease severity of COVID-19 and changes in stool microbes through a seven-month follow-up of stool collection.<br><br>METHODS: We conducted a multicentre, prospective longitudinal study of 58 COVID-19 patients and 116 uninfected controls. Differences in the gut microbiota were analysed using 16S ribosomal RNA sequencing. The first stool samples were collected at an early convalescent phase of COVID-19, and the second sample was collected at least seven months after COVID-19 infection.<br><br>RESULTS AND DISCUSSION: At the order level, Eubacteriales and Bifidobacteriales decreased, while Bacteroidales and Burkholderiales increased in the COVID-19 group compared to the controls. Alpha diversity also decreased in COVID-19 patients compared to controls, with imperfect recovery of the gut microbiome after seven months. The compositional change in the gut microbiome between the early and late convalescent phases was largest in the moderate and severe groups. The severity of COVID-19 was the most influential clinical variable for microbiome composition (Sum of Sqs = 0.686, P = 0.006), and its effect persisted even after partialling out other effects such as antibiotic use and age. Thus, our study indicates a possible interaction between respiratory viral infection and the composition of the gut microbiota community, warranting future mechanistic and prospective longitudinal studies. Additionally, we were able to detect microbiome changes in patients who were re-infected with SARS-CoV-2. Notably, the dominant bacteria in the re-infected group were Lachnospiraceae and Faecalimonas umbilicata, compared to the one-time infected group.}, }
@article {pmid39667337, year = {2025}, author = {Chen, YT and Reid, T and Weisener, C}, title = {Microbial community and functional shifts across agricultural and urban landscapes within a Lake Erie watershed.}, journal = {Journal of environmental management}, volume = {373}, number = {}, pages = {123683}, doi = {10.1016/j.jenvman.2024.123683}, pmid = {39667337}, issn = {1095-8630}, mesh = {*Lakes/microbiology ; Nitrogen ; Agriculture ; Ontario ; *Microbiota ; Geologic Sediments/microbiology ; Ecosystem ; }, abstract = {The role of sediment microbial communities in regulating the loss and retention of nutrients in aquatic ecosystems has been increasingly recognised. However, in the Great Lakes, where nutrient mitigation focuses on harmful algal blooms, there are limited studies examining the fundamental role of water/sediment microbes in nutrient biogeochemical cycling. Little is understood in this regard considering the increase in anthropogenic pressure on in-stream biological processes impacting nutrient flux to lakes. In this study, metagenomic and metatranscriptomic approaches were used to investigate the microbial community and gene regulation. The study focused on nitrogen (N) metabolism in a nutrient-polluted watershed of Lake Erie in southwestern Ontario, Canada. Nutrients and microbial analyses of water and sediments were collected in 2020 and 2021 from Sturgeon Creek headwaters to the nearshore of Lake Erie. Results showed no significant shifts in community structure with nutrient concentrations or land use. Metabolically, active genes involved in denitrification (consisting of 32-53% of N metabolic transcripts) showed the highest expression within agricultural and wetland dominant locations. Based on active gene expression patterns, the urbanised location coinciding with peak nitrate (NO3[-]) concentrations showed the greatest potential for nitrous oxide (N2O) emission and nitrogen loss along this transect. In contrast to denitrification, direct nitrification (5-21% of N metabolic transcripts) increased two-fold approaching downstream and nearshore lake locations. Across this river-lake corridor, expression of key functional genes associated with N transformation showed strong correlation with the change in concentrations of aqueous NO3[-] and nitrite (NO2[-]) and the ratio of NO2[-]/NO3[-]. Our findings demonstrated a clear link between sediment microbial metabolism and overlying water chemistry in this lotic system. We suggest that future studies assessing nutrient mitigation consider sediment biogeochemical processes and N-metabolising bacteria, and their fundamental role and cooperative relationship with nutrient and hydrological dynamics of overlying waters.}, }
@article {pmid39665565, year = {2025}, author = {Gao, X and Liang, H and Hu, T and Zou, Y and Xiao, L}, title = {Cultivated genome references for protein database construction and high-resolution taxonomic annotation in metaproteomics.}, journal = {Microbiology spectrum}, volume = {13}, number = {2}, pages = {e0175524}, pmid = {39665565}, issn = {2165-0497}, support = {No. 32100009//MOST | National Natural Science Foundation of China (NSFC)/ ; No.XMHT20220104017//Shenzhen Municipal Science and Technology Innovation Council | Shenzhen Key Laboratory Fund ()/ ; }, mesh = {*Metagenomics/methods ; *Proteomics/methods ; *Databases, Protein ; Gastrointestinal Microbiome/genetics ; *Bacteria/classification/genetics ; Molecular Sequence Annotation ; Humans ; *Genome, Bacterial ; *Bacterial Proteins/genetics ; }, abstract = {Metaproteomics offers a profound understanding of the functional dynamics of the gut microbiome, which is crucial for personalized healthcare strategies. The selection of an appropriate database is a critical step for the identification of peptides and proteins, as well as for the provision of accurate taxonomic and functional annotations. The matched metagenomic-derived database is considered to be the best, but its limitations include the identification of low-abundance organisms and taxonomic resolution. Herein, we constructed a protein database (DBCGR2) based on Cultivated Genome Reference 2 (CGR2) and developed a complete peptide-centric analysis workflow for database searching and for the annotation of taxonomy and function. This workflow was subsequently appraised in comparison with metagenomics-derived databases for the analysis of metaproteomic data. Our findings suggested that the performance of DBCGR2 in identification was comparable with metagenomics-derived databases with improvement in identification rates of peptides from low-abundance species. The database searching results could be fully annotated using the pepTaxa taxonomic annotation approach developed in this study, and the taxonomic resolution was enhanced to strain level. Additionally, the results demonstrated that the sensitivity of functional annotation could be enhanced by employing DBCGR2. Overall, the DBCGR2 combined with pepTaxa can be considered an alternative for metaproteomic data analysis with superior analysis performances.IMPORTANCEMass spectrometry-based metaproteomics offers a profound understanding of the gut microbial taxonomy and functionality. The databases utilized in the analysis of metaproteomic data are crucial, as they determine the identification of proteins that can be recognized and linked to overall human health, in addition to the quality of taxonomic and functional annotation. Among the most effective approaches for constructing protein databases is the utilization of metagenomic sequencing to create matched databases. However, the database, derived from isolated genomes, has yet to undergo rigorous testing for their efficacy and accuracy in protein identification and taxonomic and functional annotation. Here, we constructed a protein database DBCGR2 derived from Cultivated Genome Reference 2 (CGR2) and a complete workflow for data analysis. We compared the performances of DBCGR2 and metagenomics-derived databases. Our results indicated that DBCGR2 can be regarded as an alternative to metagenomics-derived databases, which contribute to metaproteomic data analysis.}, }
@article {pmid39665561, year = {2025}, author = {Unzueta-Martínez, A and Girguis, PR}, title = {Taxonomic diversity and functional potential of microbial communities in oyster calcifying fluid.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0109424}, pmid = {39665561}, issn = {1098-5336}, support = {2109473//National Science Foundation (NSF)/ ; 9208//Gordon and Betty Moore Foundation (GBMF)/ ; }, mesh = {Animals ; *Microbiota ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Ostreidae/microbiology ; *Archaea/classification/genetics/isolation &amp; purification/metabolism ; Biomineralization ; Viruses/classification/genetics/isolation &amp; purification ; Calcification, Physiologic ; Metagenomics ; Biodiversity ; Phylogeny ; }, abstract = {UNLABELLED: Creating and maintaining an appropriate chemical environment is essential for biomineralization, the process by which organisms precipitate minerals to form their shells or skeletons, yet the mechanisms involved in maintaining calcifying fluid chemistry are not fully defined. In particular, the role of microorganisms in facilitating or hindering animal biomineralization is poorly understood. Here, we investigated the taxonomic diversity and functional potential of microbial communities inhabiting oyster calcifying fluid. We used shotgun metagenomics to survey calcifying fluid microbial communities from three different oyster harvesting sites. There was a striking consistency in taxonomic composition across the three collection sites. We also observed archaea and viruses that had not been previously identified in oyster calcifying fluid. Furthermore, we identified microbial energy-conserving metabolisms that could influence the host's calcification, including genes involved in sulfate reduction and denitrification that are thought to play pivotal roles in inorganic carbon chemistry and calcification in microbial biofilms. These findings provide new insights into the taxonomy and functional capacity of oyster calcifying fluid microbiomes, highlighting their potential contributions to shell biomineralization, and contribute to a deeper understanding of the interplay between microbial ecology and biogeochemistry that could potentially bolster oyster calcification.<br><br>IMPORTANCE: Previous research has underscored the influence of microbial metabolisms in carbonate deposition throughout the geological record. Despite the ecological importance of microbes to animals and inorganic carbon transformations, there have been limited studies characterizing the potential role of microbiomes in calcification by animals such as bivalves. Here, we use metagenomics to investigate the taxonomic diversity and functional potential of microbial communities in calcifying fluids from oysters collected at three different locations. We show a diverse microbial community that includes bacteria, archaea, and viruses, and we discuss their functional potential to influence calcifying fluid chemistry via reactions like sulfate reduction and denitrification. We also report the presence of carbonic anhydrase and urease, both of which are critical in microbial biofilm calcification. Our findings have broader implications in understanding what regulates calcifying fluid chemistry and consequentially the resilience of calcifying organisms to 21st century acidifying oceans.}, }
@article {pmid39662821, year = {2025}, author = {Groenewegen, B and van Lingen, E and Kovynev, A and van den Berg, AJ and Berssenbrugge, EKL and Sanders, IMJG and van Prehn, J and van Nood, E and Goorhuis, A and Kuijper, EJ and Smits, WK and Wiese, M and Keller, JJ and Ducarmon, QR and Terveer, EM and , }, title = {The presence of Clostridioides difficile in faeces before and after faecal microbiota transplantation and its relation with recurrent C. difficile infection and the gut microbiota in a Dutch cohort.}, journal = {Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases}, volume = {31}, number = {4}, pages = {568-574}, doi = {10.1016/j.cmi.2024.12.003}, pmid = {39662821}, issn = {1469-0691}, mesh = {Humans ; *Fecal Microbiota Transplantation ; *Clostridioides difficile/isolation &amp; purification/genetics ; *Feces/microbiology ; Male ; *Clostridium Infections/therapy/microbiology/epidemiology ; Female ; Middle Aged ; Aged ; *Gastrointestinal Microbiome ; Recurrence ; Netherlands/epidemiology ; Adult ; Cohort Studies ; Anti-Bacterial Agents/therapeutic use ; Aged, 80 and over ; Risk Factors ; Vancomycin/therapeutic use ; Treatment Outcome ; }, abstract = {OBJECTIVES: The objectives of this study are to investigate the presence of Clostridioides difficile in faeces of patients with recurrent C. difficile infection (rCDI) before and after faecal microbiota transplantation (FMT) and to identify risk factors for faecal C. difficile and C. difficile infection (CDI) recurrence.<br><br>METHODS: n&#xa0;=&#xa0;83 faecal sample triads (pre-FMT [&#x223c;1&#xa0;day], post-FMT [&#x223c;3&#xa0;weeks], and a corresponding FMT donor sample), and n&#xa0;=&#xa0;22 long-term (&#x223c;1-3&#xa0;years) follow-up faecal samples were collected from FMT-treated patients. The presence of C.&#xa0;difficile in faeces was assessed by enrichment broth culture and PCR (tcdB gene) and associated with patient characteristics, FMT outcome, duration of pre-FMT vancomycin, FMT donor, post-FMT antibiotic use, and faecal microbiota composition (shotgun metagenomics).<br><br>RESULTS: The FMT cure rate for rCDI was 92.8% (77/83), with six early CDI recurrences (<2&#xa0;months post-FMT). Toxigenic C.&#xa0;difficile was cultured in 27.7% (23/83) of all patients post-FMT, 23.4% (18/77) of patients cured 2&#xa0;months post-FMT, and 13.6% (3/22) at long-term follow-up. Early CDI recurrence (n&#xa0;=&#xa0;6) was associated with positive C.&#xa0;difficile culture post-FMT (21.7% [5/23] vs. 1.7% [1/60], p 0.01), post-FMT antibiotics (30.0% [3/10] vs. 4.6% [3/65], p 0.03), and a short course of pre-FMT vancomycin (median 6.0&#xa0;days, IQR [5-12] vs. 18&#xa0;days, IQR [10.8-29], p&#xa0;<&#xa0;0.05). Additionally, positive C.&#xa0;difficile culture directly pre-FMT was associated with a short course of pre-FMT vancomycin (median 9&#xa0;days IQR [5-18] vs. 17&#xa0;days, IQR [10-29.2], p 0.04). Gut microbiota analyses did not reveal signatures associated with C.&#xa0;difficile culture result, despite statistically non-significant trends in relative abundances of the Enterobacteriaceae family, and Dorea, Roseburia, and Clostridiales species.<br><br>DISCUSSION: Although eradication of C.&#xa0;difficile is not required for clinical cure of rCDI by FMT, it is associated with reduced prevalence of early CDI recurrence, as are the full completion of pre-FMT vancomycin (at least 10&#xa0;days) and avoiding post-FMT antibiotics.}, }
@article {pmid39662756, year = {2025}, author = {Hodgkiss, R and Acharjee, A}, title = {Unravelling metabolite-microbiome interactions in inflammatory bowel disease through AI and interaction-based modelling.}, journal = {Biochimica et biophysica acta. Molecular basis of disease}, volume = {1871}, number = {3}, pages = {167618}, doi = {10.1016/j.bbadis.2024.167618}, pmid = {39662756}, issn = {1879-260X}, support = {HDRUK/CFC/01/MRC_/Medical Research Council/United Kingdom ; }, mesh = {Humans ; *Inflammatory Bowel Diseases/microbiology/metabolism ; *Gastrointestinal Microbiome ; *Metabolome ; Feces/microbiology ; Dysbiosis/microbiology/metabolism ; *Artificial Intelligence ; }, abstract = {Inflammatory Bowel Diseases (IBDs) are chronic inflammatory disorders of the gastrointestinal tract and colon affecting approximately 7 million individuals worldwide. The knowledge of specific pathology and aetiological mechanisms leading to IBD is limited, however a reduced immune system, antibiotic use and reserved diet may initiate symptoms. Dysbiosis of the gut microbiome, and consequently a varied composition of the metabolome, has been extensively linked to these risk factors and IBD. Metagenomic sequencing and liquid-chromatography mass spectrometry (LC-MS) of N = 220 fecal samples by Fransoza et al., provided abundance data on microbial genera and metabolites for use in this study. Identification of differentially abundant microbes and metabolites was performed using a Wilcoxon test, followed by feature selection of random forest (RF), gradient-boosting (XGBoost) and least absolute shrinkage operator (LASSO) models. The performance of these features was then validated using RF models on the Human Microbiome Project 2 (HMP2) dataset and a microbial community (MICOM) model was utilised to predict and interpret the interactions between key microbes and metabolites. The Flavronifractor genus and microbes of the families Lachnospiraceae and Oscillospiraceae were found differential by all models. Metabolic pathways commonly influenced by such microbes in IBD were CoA biosynthesis, bile acid metabolism and amino acid production and degradation. This study highlights distinct interactive microbiome and metabolome profiles within IBD and the highly potential pathways causing disease pathology. It therefore paves way for future investigation into new therapeutic targets and non-invasive diagnostic tools for IBD.}, }
@article {pmid39662407, year = {2025}, author = {Wang, Y and Yi, H and Li, G and Li, A and Wang, H and Ding, D}, title = {Influence of enriched nitrate reducing bacteria communities on bacterial community structure and groundwater condition during in situ bioremediation of nitrate in acidic uranium-contaminated groundwater.}, journal = {The Science of the total environment}, volume = {958}, number = {}, pages = {177896}, doi = {10.1016/j.scitotenv.2024.177896}, pmid = {39662407}, issn = {1879-1026}, mesh = {*Groundwater/chemistry/microbiology ; *Nitrates/metabolism/analysis ; Biodegradation, Environmental ; *Uranium/metabolism/analysis ; *Bacteria/metabolism ; China ; *Water Pollutants, Chemical/metabolism/analysis ; *Water Pollutants, Radioactive/metabolism/analysis ; Microbiota ; }, abstract = {In-situ leaching (ISL) is the predominant technology used in uranium mining currently, although it leads to significant environmental challenges. Nitrates, a key component in leaching agents, not only pose a threat to human health but also impede the bioreduction of U(VI) in uranium-contaminated water. In this study, the nitrate reducing bacterial (NRB) communities adapted to acidic uranium-contaminated groundwater from a site in Northwest China were gained by an enrichment micro-model. The effects of the NRB communities on the groundwater parameters and microbial diversity were evaluated using the groundwater-core column leaching system during the in-situ bioremediation of nitrate. The enrichment experiments revealed that NRB communities adapted to acidic uranium-contaminated groundwater were successfully enriched, of which Tumebacillus was the main functional bacterium. The column leaching experiment results showed that adding NRB communities successfully reduced nitrate levels from 100.91 mg/L to 0.7 mg/L in just 8 days, improved groundwater acidity and redox conditions. Additionally, the metagenomic analysis showed that introducing NRB communities increased biomass and indigenous NRB, but decreased microbial diversity. The KEGG enrichment analysis suggested that butanoate metabolism and valine, leucine and isoleucine degradation were promoted by adding enriched NRB communities. This research lays the groundwork for nitrate removal from contaminated groundwater in areas affected by ISL in uranium mines, setting the stage for future in situ bioremediation of U(VI).}, }
@article {pmid39660920, year = {2025}, author = {Zavarzina, DG and Maslov, AA and Merkel, AY and Kharitonova, NA and Klyukina, AA and Baranovskaya, EI and Baydariko, EA and Potapov, EG and Zayulina, KS and Bychkov, AY and Chernyh, NA and Bonch-Osmolovskaya, EA and Gavrilov, SN}, title = {Analogs of Precambrian microbial communities formed de novo in Caucasian mineral water aquifers.}, journal = {mBio}, volume = {16}, number = {1}, pages = {e0283124}, pmid = {39660920}, issn = {2150-7511}, mesh = {*Groundwater/microbiology/chemistry ; *Mineral Waters/microbiology ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Microbiota ; Archaea/genetics/classification/metabolism ; Phylogeny ; Metagenomics ; }, abstract = {The microbiome of deep continental aquifers is considered the most slowly evolving part of the biosphere. The Yessentukskoye Mineral Water Basin (YMWB), located in the pre-Caucasus region, contains three closely spaced but distinct aquifers, the Upper Cretaceous, the Lower Cretaceous, and the Upper Jurassic, which represent unique objects for subsurface biosphere research due to gas-hydrogeochemical and thermal anomalies of the area. We analyzed the geological and hydrogeochemical parameters of the three aquifers and a recharge area of the YMWB and investigated their microbial communities using metagenomic and cultivation-based approaches within a long-term survey. Correlation analysis of the obtained data revealed stable and highly stratified microbial communities inhabiting four distinct ecosystems. Their structure and the metabolic traits of their prokaryotic populations were similar to those presumed to have dominated the Earth's biosphere during several critical periods of its evolutionary history, that is, the Early Archean, the period of banded iron formations accumulation, and the Great Oxidation Event. Among the YMWB strata, the Upper Jurassic aquifer, supersaturated with CO2, influenced by magmatic activity, and highly enriched with thermophilic autotrophic hydrogenotrophic acetogens, turned out to be the first described modern ecosystem based on the primary production by a process predicted to support the Last Universal Common Ancestor (LUCA). The characterization of the YMWB microbial communities reveals a contemporary model environment of the early stages of Earth's development and thus contributes to the understanding of the evolutionary traits in microbial populations that may have played a critical role in the formation of the modern biosphere.IMPORTANCEContinental subsurface environments are estimated to harbor up to one-fifth of the planet's total biomass, representing the most stable and slowly evolving part of the biosphere. Among the deep subsurface inhabitants, the microbial communities of drinking mineral waters remain the least studied. Our interdisciplinary study of the Yessentukskoye Mineral Water Basin shows how hydrochemical and hydrodynamic factors shape different subsurface ecosystems, whose microbial populations influence the composition of mineral waters. A comprehensive analysis reveals the similarity of these ecosystems to those predicted for the early Earth. The deepest of the studied aquifers is the first described modern ecosystem with the most probable primary producer performing hydrogenotrophic acetogenesis. Thus, our results contribute to the understanding of the genesis of modern drinking water resources and expand the knowledge of the evolutionary traits that may have played a critical role in the formation of the Earth's biosphere.}, }
@article {pmid39660898, year = {2025}, author = {Su, G and Huang, P and Liu, D and Xing, G and Guo, R and Li, S and Fan, S and Cheng, L and Yan, Q and Yang, W}, title = {Gut mycobiome alterations and network interactions with the bacteriome in patients with atherosclerotic cardiovascular disease.}, journal = {Microbiology spectrum}, volume = {13}, number = {1}, pages = {e0218224}, pmid = {39660898}, issn = {2165-0497}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Mycobiome ; Male ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Middle Aged ; *Fungi/classification/genetics/isolation &amp; purification ; Aged ; *Atherosclerosis/microbiology ; Cardiovascular Diseases/microbiology ; Metagenomics ; Feces/microbiology ; }, abstract = {The connection between the gut mycobiome and atherosclerotic cardiovascular disease (ACVD) is largely uncharted. In our study, we compared the gut fungal communities of 214 ACVD patients with those of 171 healthy controls using shotgun metagenomic sequencing and examined their interactions with gut bacterial communities and network key taxa. The gut mycobiome composition in ACVD patients is significantly different, showing a rise in opportunistic pathogens like Candida albicans, Exophiala spinifera, and Malassezia restricta, with Exophiala and Malassezia showing the most significant changes (Wilcoxon rank-sum test, P < 0.001, fold change >10). Network analysis revealed a less interconnected and more uneven gut microbial network in ACVD patients. Network key taxa identified in the ACVD gut microbiome network include Malassezia globosa c182, Nakaseomyces glabratus c88, Malassezia arunalokei c192, and Penicillium sumatraense c22. Predictive models that integrated both bacterial and fungal taxa enhanced prediction accuracy, underscoring the critical role of gut fungi in ACVD. Our findings offer a thorough understanding of the link between the gut mycobiome and ACVD progression, which is vital for directing future therapeutic research.IMPORTANCEACVD is a leading cause of death and morbidity worldwide. While the role of the gut microbiome in ACVD development is recognized, the contribution of the gut mycobiome remains largely unexplored. Our study reveals significant alterations in the gut mycobiome of ACVD patients and identifies key fungal taxa associated with the disease. These findings underscore the importance of the gut mycobiome in the pathogenesis of ACVD and offer new avenues for developing preventive and therapeutic strategies targeting the gut fungal community. Our results provide valuable insights into the complex interplay between gut fungi and bacteria in ACVD, paving the way for novel therapeutic approaches.}, }
@article {pmid39660058, year = {2024}, author = {Boer, MD and Melkonian, C and Zafeiropoulos, H and Haas, AF and Garza, DR and Dutilh, BE}, title = {Improving genome-scale metabolic models of incomplete genomes with deep learning.}, journal = {iScience}, volume = {27}, number = {12}, pages = {111349}, pmid = {39660058}, issn = {2589-0042}, abstract = {Deciphering microbial metabolism is essential for understanding ecosystem functions. Genome-scale metabolic models (GSMMs) predict metabolic traits from genomic data, but constructing GSMMs for uncultured bacteria is challenging due to incomplete metagenome-assembled genomes, resulting in many gaps. We introduce the deep neural network guided imputation of reactomes (DNNGIOR), which uses AI to improve gap-filling by learning from the presence and absence of metabolic reactions across diverse bacterial genomes. Key factors for prediction accuracy are: (1) reaction frequency across all bacteria and (2) phylogenetic distance of the query to the training genomes. DNNGIOR predictions achieve an average F1 score of 0.85 for reactions present in over 30% of training genomes. DNNGIOR guided gap-filling was 14 times more accurate for draft reconstructions and 2-9 times for curated models than unweighted gap-filling.}, }
@article {pmid39658189, year = {2024}, author = {Dufault-Thompson, K and Levy, S and Hall, B and Jiang, X}, title = {Bilirubin reductase shows host-specific associations in animal large intestines.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39658189}, issn = {1751-7370}, mesh = {Animals ; *Phylogeny ; *Gastrointestinal Microbiome ; *Intestine, Large/microbiology ; *Oxidoreductases Acting on CH-CH Group Donors/genetics/metabolism ; Bilirubin/metabolism ; Heme/metabolism ; Bacteria/genetics/classification/isolation &amp; purification/enzymology ; Metagenomics ; }, abstract = {Animal gastrointestinal tracts contain diverse metabolites, including various host-derived compounds that gut-associated microbes interact with. Here, we explore the diversity and evolution of bilirubin reductase, a bacterial enzyme that metabolizes the host-derived tetrapyrrole bilirubin, performing a key role in the animal heme degradation pathway. Through an analysis of the bilirubin reductase phylogeny and predicted structures, we found that the enzyme family can be divided into three distinct clades with different structural features. Using these clade definitions, we analyzed metagenomic sequencing data from multiple animal species, finding that bilirubin reductase is significantly enriched in the large intestines of animals and that the clades exhibit differences in distribution among animals. Combined with phylogenetic signal analysis, we find that the bilirubin reductase clades exhibit significant associations with specific animals and animal physiological traits like gastrointestinal anatomy and diet. These patterns demonstrate that bilirubin reductase is specifically adapted to the anoxic lower gut environment of animals and that its evolutionary history is complex, involving adaptation to a diverse collection of animals harboring bilirubin-reducing microbes. The findings suggest that bilirubin reductase evolution has been shaped by the host environment, providing a new perspective on heme metabolism in animals and highlighting the importance of the microbiome in animal physiology and evolution.}, }
@article {pmid39657789, year = {2025}, author = {Zdouc, MM and Blin, K and Louwen, NLL and Navarro, J and Loureiro, C and Bader, CD and Bailey, CB and Barra, L and Booth, TJ and Bozhüyük, KAJ and Cediel-Becerra, JDD and Charlop-Powers, Z and Chevrette, MG and Chooi, YH and D'Agostino, PM and de Rond, T and Del Pup, E and Duncan, KR and Gu, W and Hanif, N and Helfrich, EJN and Jenner, M and Katsuyama, Y and Korenskaia, A and Krug, D and Libis, V and Lund, GA and Mantri, S and Morgan, KD and Owen, C and Phan, CS and Philmus, B and Reitz, ZL and Robinson, SL and Singh, KS and Teufel, R and Tong, Y and Tugizimana, F and Ulanova, D and Winter, JM and Aguilar, C and Akiyama, DY and Al-Salihi, SAA and Alanjary, M and Alberti, F and Aleti, G and Alharthi, SA and Rojo, MYA and Arishi, AA and Augustijn, HE and Avalon, NE and Avelar-Rivas, JA and Axt, KK and Barbieri, HB and Barbosa, JCJ and Barboza Segato, LG and Barrett, SE and Baunach, M and Beemelmanns, C and Beqaj, D and Berger, T and Bernaldo-Agüero, J and Bettenbühl, SM and Bielinski, VA and Biermann, F and Borges, RM and Borriss, R and Breitenbach, M and Bretscher, KM and Brigham, MW and Buedenbender, L and Bulcock, BW and Cano-Prieto, C and Capela, J and Carrion, VJ and Carter, RS and Castelo-Branco, R and Castro-Falcón, G and Chagas, FO and Charria-Girón, E and Chaudhri, AA and Chaudhry, V and Choi, H and Choi, Y and Choupannejad, R and Chromy, J and Donahey, MSC and Collemare, J and Connolly, JA and Creamer, KE and Crüsemann, M and Cruz, AA and Cumsille, A and Dallery, JF and Damas-Ramos, LC and Damiani, T and de Kruijff, M and Martín, BD and Sala, GD and Dillen, J and Doering, DT and Dommaraju, SR and Durusu, S and Egbert, S and Ellerhorst, M and Faussurier, B and Fetter, A and Feuermann, M and Fewer, DP and Foldi, J and Frediansyah, A and Garza, EA and Gavriilidou, A and Gentile, A and Gerke, J and Gerstmans, H and Gomez-Escribano, JP and González-Salazar, LA and Grayson, NE and Greco, C and Gomez, JEG and Guerra, S and Flores, SG and Gurevich, A and Gutiérrez-García, K and Hart, L and Haslinger, K and He, B and Hebra, T and Hemmann, JL and Hindra, H and Höing, L and Holland, DC and Holme, JE and Horch, T and Hrab, P and Hu, J and Huynh, TH and Hwang, JY and Iacovelli, R and Iftime, D and Iorio, M and Jayachandran, S and Jeong, E and Jing, J and Jung, JJ and Kakumu, Y and Kalkreuter, E and Kang, KB and Kang, S and Kim, W and Kim, GJ and Kim, H and Kim, HU and Klapper, M and Koetsier, RA and Kollten, C and Kovács, &#xc1;T and Kriukova, Y and Kubach, N and Kunjapur, AM and Kushnareva, AK and Kust, A and Lamber, J and Larralde, M and Larsen, NJ and Launay, AP and Le, NT and Lebeer, S and Lee, BT and Lee, K and Lev, KL and Li, SM and Li, YX and Licona-Cassani, C and Lien, A and Liu, J and Lopez, JAV and Machushynets, NV and Macias, MI and Mahmud, T and Maleckis, M and Martinez-Martinez, AM and Mast, Y and Maximo, MF and McBride, CM and McLellan, RM and Bhatt, KM and Melkonian, C and Merrild, A and Metsä-Ketelä, M and Mitchell, DA and Müller, AV and Nguyen, GS and Nguyen, HT and Niedermeyer, THJ and O'Hare, JH and Ossowicki, A and Ostash, BO and Otani, H and Padva, L and Paliyal, S and Pan, X and Panghal, M and Parade, DS and Park, J and Parra, J and Rubio, MP and Pham, HT and Pidot, SJ and Piel, J and Pourmohsenin, B and Rakhmanov, M and Ramesh, S and Rasmussen, MH and Rego, A and Reher, R and Rice, AJ and Rigolet, A and Romero-Otero, A and Rosas-Becerra, LR and Rosiles, PY and Rutz, A and Ryu, B and Sahadeo, LA and Saldanha, M and Salvi, L and Sánchez-Carvajal, E and Santos-Medellin, C and Sbaraini, N and Schoellhorn, SM and Schumm, C and Sehnal, L and Selem, N and Shah, AD and Shishido, TK and Sieber, S and Silviani, V and Singh, G and Singh, H and Sokolova, N and Sonnenschein, EC and Sosio, M and Sowa, ST and Steffen, K and Stegmann, E and Streiff, AB and Strüder, A and Surup, F and Svenningsen, T and Sweeney, D and Szenei, J and Tagirdzhanov, A and Tan, B and Tarnowski, MJ and Terlouw, BR and Rey, T and Thome, NU and Torres Ortega, LR and Tørring, T and Trindade, M and Truman, AW and Tvilum, M and Udwary, DW and Ulbricht, C and Vader, L and van Wezel, GP and Walmsley, M and Warnasinghe, R and Weddeling, HG and Weir, ANM and Williams, K and Williams, SE and Witte, TE and Rocca, SMW and Yamada, K and Yang, D and Yang, D and Yu, J and Zhou, Z and Ziemert, N and Zimmer, L and Zimmermann, A and Zimmermann, C and van der Hooft, JJJ and Linington, RG and Weber, T and Medema, MH}, title = {MIBiG 4.0: advancing biosynthetic gene cluster curation through global collaboration.}, journal = {Nucleic acids research}, volume = {53}, number = {D1}, pages = {D678-D690}, pmid = {39657789}, issn = {1362-4962}, support = {//Conahcyt Mexico International PhD Studentship/ ; 32170080//National Natural Science Foundation of China/ ; 547394769//German Research Foundation/ ; 101066127//European Union/ ; NNF19SA0059360//Novo Nordisk Foundation INTERACT/ ; //Swedish Pharmaceutical Society PostDoc/ ; F32AT011475/AT/NCCIH NIH HHS/United States ; //Werner Siemens Foundation/ ; 027/E5/PG.02.00.PL/2024//Ministry of Education/ ; ANR-17-EUR-0007//EUR Saclay Plant Sciences-SPS/ ; PROYEXCEL_00012//Spanish "Junta de Andaluc&#xed;a"/ ; 1347411//CONAHCYT/ ; IM230100154//Australian Research Council Industry Fellowship/ ; 1229222N//Research Foundation-Flanders (FWO)/ ; R01 GM146224/GM/NIGMS NIH HHS/United States ; //Swiss Federal Government/ ; OSF.23.1.044//NWO Open Science Project 'BiG-CODEC'/ ; //NWO Merian/ ; R01 GM097142/GM/NIGMS NIH HHS/United States ; 024.004.014//MiCRop Consortium/ ; CZIF2022-007203//Chan Zuckerberg Initiative Foundation/ ; BB/T007222/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom ; DP230102668//Australian Research Council Discovery Project/ ; 57/0009//Ministry of Education and Science of Ukraine/ ; //Delta Stewardship Council Delta Science Program/ ; T32 GM136629/GM/NIGMS NIH HHS/United States ; //Basic Science Research Program/ ; R01-GM146224/GM/NIGMS NIH HHS/United States ; K12 GM068524/GM/NIGMS NIH HHS/United States ; AUFF-E-2022-9-42//AUFF/ ; 10062709//UK Innovation Funding Agency (UKRI)/ ; CBET-2032243//U.S. National Science Foundation/ ; //University of Illinois/ ; //HZI POF IV Cooperativity and Creativity Project Call/ ; //Horizon Europe Marie Sk&#x142;odowska-Curie Actions Postdoctoral Fellowship/ ; NE/T010959/1//Signals in the Soil/ ; ANR-24-CE20-7299-01//Agence Nationale de la Recherche/ ; DNRF137//Danish National Research Foundation/ ; OCENW.GROOT.2019.063//NWO-XL/ ; BB/V005723/2//BBSRC/ ; 101087181//EU/ ; 101000392//Horizon 2020/ ; 101072485//European Union's Horizon/ ; 10.55776/P 34036//Austrian Science Fund/ ; EP/X03142X/1//United Kingdom Research and Innovation/ ; 23/01956-2//S&#xe3;o Paulo Research Foundation/ ; //Department of Biotechnology/ ; 222676//USDA Evans-Allen Research/ ; //Saarland University/ ; 102022750//SINTEF/ ; //Hans Fischer Society/ ; 21K06336//KAKENHI/ ; CF22-1239//Carlsberg Foundation/ ; ANR-22-CE44-0011-01 UMISYN//Agence Nationale de la Recherche/ ; 495740318//German Research Foundation/ ; 802736//European Union Horizon 2020/ ; //Strathclyde University Global Research Scholarship/ ; NNF22OC0079021//Novo Nordisk Foundation Postdoctoral Fellowship/ ; 101055020-COMMUNITY//ERC Advanced/ ; 101099528//European Innovation Council/ ; GNT2021638//National Health and Medical Research Council/ ; 757173//Consejo Nacional de Ciencia y Tecnolog&#xed;a/ ; NA22NOS4200050//NERRS/ ; 865738/ERC_/European Research Council/International ; DGE 2241144//NSF GRFP/ ; //National Research Fund of Ukraine/ ; RYC2020-029240-I//Ministerio de Ciencia, Innovaci&#xf3;n y Universidades/ ; MR/V022334/1//UKRI Future Leaders Fellowship/ ; 102029187//SEP AGREE/ ; NNF22OC0078997//Novo Nodisk Foundation/ ; F31 ES036421/ES/NIEHS NIH HHS/United States ; KICH1.LWV04.21.013//NWO/ ; DM60066//Italian Ministry of Research/ ; 101117891-MeDiSyn//ERC Starting/ ; //European Union's Horizon 2020 Research/ ; R01 GM123998/GM/NIGMS NIH HHS/United States ; NRF 2018R1A5A2023127//Korea Government (MSIT)/ ; PS00349981//Fulbright/ ; NRF-2020R1A6A1A03044512//Korean Government (MSIT)/ ; 735867//Consejo Nacional de Ciencia y Tecnolog&#xed;a/ ; 3141-00013A//Innovation Fund Denmark/ ; CFB 2.0//Novo Nordisk Foundation/ ; 21/07038-0//S&#xe3;o Paulo Research Foundation/ ; 2021YFA0909500//National Key Research and Development Program of China/ ; 101072485//European Union's Horizon Europe/ ; OCENW.XL21.XL21.088//NWO-XL/ ; //University Grants Commission/ ; //Natural Science and Research Council of Canada/ ; TTU 09.826//German Center for Infection Research/ ; //European Regional Development Fund/ ; 101072485//Horizon Europe Marie Sk&#x142;odowska-Curie/ ; DNRF137//Danish National Research Foundation CeMiSt/ ; BB/X010953/1//Growing Health Institute Strategic Programme/ ; BB/X01097X/1//BBSRC Institute Strategic Program/ ; 802736//European Union's Horizon 2020/ ; //Alexander von Humboldt-Stiftung/ ; //UK Government Department for Environment, Food &amp; Rural Affairs (DEFRA) Global Centre on Biodiversity for the Climate/ ; //Shanghai Pilot Program for Basic Research - Shanghai Jiao Tong University/ ; 102024676-14//POS BIOINFO 2024/ ; MR/W011247/1//UKRI Future Leaders Fellowship/ ; DGE 21-46756//National Science Foundation Graduate Research Fellowship/ ; 101106349//Marie Sklodowska-Curie/ ; T32-GM136629//Chemical-Biology Interface Training/ ; //University of Sydney/ ; 101000794//SECRETed EU Project Horizon 2020/ ; 2022R1C1C2004118//National Research Foundation of Korea/ ; //Indonesia Endowment Fund for Education Agency (LPDP)/ ; 101130799//European Union's Horizon/ ; 852600//Innovation Program ERC St/ ; //National Agri-Food Biotechnology Institute/ ; //German Academic Scholarship Foundation/ ; 205320_219638/SNSF_/Swiss National Science Foundation/Switzerland ; EXC-2124/1-09.029_0//Cluster of Excellence: Controlling Microbes to Fight Infection/ ; F32 AT011475/AT/NCCIH NIH HHS/United States ; 398967434-TRR 261//Deutsche Forschungsgemeinschaft/ ; 212747/SNSF_/Swiss National Science Foundation/Switzerland ; K445/2022//Leibniz Association/ ; NRF-RS-2024-00352229//Ministry of Science and ICT/ ; //Natural Sciences and Engineering Research Council of Canada Discovery/ ; VI.Veni.202.130//NWO Talent/ ; 106/IV/KS/11/2023//National Research and Innovation Agency/ ; T32GM136583/NH/NIH HHS/United States ; DE-AC02-05CH11231//U.S. Department of Energy/ ; }, mesh = {*Multigene Family ; *Databases, Genetic ; Biosynthetic Pathways/genetics ; Molecular Sequence Annotation ; Biological Products/metabolism/chemistry ; Data Curation ; }, abstract = {Specialized or secondary metabolites are small molecules of biological origin, often showing potent biological activities with applications in agriculture, engineering and medicine. Usually, the biosynthesis of these natural products is governed by sets of co-regulated and physically clustered genes known as biosynthetic gene clusters (BGCs). To share information about BGCs in a standardized and machine-readable way, the Minimum Information about a Biosynthetic Gene cluster (MIBiG) data standard and repository was initiated in 2015. Since its conception, MIBiG has been regularly updated to expand data coverage and remain up to date with innovations in natural product research. Here, we describe MIBiG version 4.0, an extensive update to the data repository and the underlying data standard. In a massive community annotation effort, 267 contributors performed 8304 edits, creating 557 new entries and modifying 590 existing entries, resulting in a new total of 3059 curated entries in MIBiG. Particular attention was paid to ensuring high data quality, with automated data validation using a newly developed custom submission portal prototype, paired with a novel peer-reviewing model. MIBiG 4.0 also takes steps towards a rolling release model and a broader involvement of the scientific community. MIBiG 4.0 is accessible online at https://mibig.secondarymetabolites.org/.}, }
@article {pmid39654977, year = {2024}, author = {Wu, J and Wang, D and He, WJ and Li, JY and Mo, X and Li, YJ}, title = {Allergen-specific sublingual immunotherapy altered gut microbiota in patients with allergic rhinitis.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1454333}, pmid = {39654977}, issn = {2235-2988}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Sublingual Immunotherapy/methods ; *Rhinitis, Allergic/therapy/microbiology/immunology ; Male ; Female ; Adult ; *Feces/microbiology ; Allergens/immunology ; Young Adult ; Animals ; Middle Aged ; Antigens, Dermatophagoides/immunology ; Dermatophagoides farinae/immunology ; Treatment Outcome ; Adolescent ; Metagenomics/methods ; }, abstract = {INTRODUCTION: Allergen-specific immunotherapy (AIT) induces long-term immune tolerance to allergens and is effective for treating allergic rhinitis (AR). However, the impact of sublingual immunotherapy (SLIT) on gut microbiota from AR patients and its correlation with treatment efficacy remains unclear.<br><br>METHODS: In the present study, we enrolled 24 AR patients sensitized to Dermatophagoides farinae (Der-f) and 6 healthy donors (HD). All AR patients received SLIT treatment using standardized Der-f drops. Stool samples were collected from AR patients before treatment, and 1- and 3-months post-treatment, as well as from HD, for metagenomic sequencing analysis.<br><br>RESULTS: AR patients had significantly lower richness and diversity in gut microbiota compared to HD, with notable alterations in composition and function. Besides, three months post-SLIT treatment, significant changes in gut microbiota composition at the genus and species levels were observed in AR patients. Streptococcus parasanguinis_B and Streptococcus parasanguinis, which were significantly lower in AR patients compared to HD, increased notably after three months of treatment. LEfSe analysis identified these species as markers distinguishing HD from AR patients and AR patients pre- from post-SLIT treatment. Furthermore, changes in the relative abundance of S. parasanguinis_B were negatively correlated with changes in VAS scores but positively correlated with changes in RCAT scores, suggesting a positive correlation with effective SLIT treatment.<br><br>DISCUSSION: SLIT treatment significantly alters the gut microbiota of AR patients, with S. parasanguinis_B potentially linked to its effectiveness. This study offers insights into SLIT mechanisms and suggests that specific strains may serve as biomarkers for predicting SLIT efficacy and as modulators for improving SLIT efficacy.}, }
@article {pmid39654975, year = {2024}, author = {Jarmukhanov, Z and Mukhanbetzhanov, N and Vinogradova, E and Kozhakhmetov, S and Kushugulova, A}, title = {Gut metagenomic features of frailty.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1486579}, pmid = {39654975}, issn = {2235-2988}, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; *Frailty/microbiology/metabolism ; Male ; Female ; Aged ; Middle Aged ; *Feces/microbiology ; *Metagenomics/methods ; Kazakhstan ; Adult ; Metagenome ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Aged, 80 and over ; Metabolic Networks and Pathways/genetics ; }, abstract = {This study investigates the relationship between frailty severity and gut microbiome characteristics in adults in Kazakhstan. We analyzed 158 participants across four frailty severity (mild to very severe) using metagenomic sequencing of stool samples. Frailty was significantly correlated with age, weight, and functional measures like walking speed and grip strength. Microbial diversity decreased significantly with increasing frailty. Beta diversity analysis revealed distinct clustering patterns based at phylum level. Taxonomically, we observed a significant inverse correlation between Firmicutes abundance and frailty. Classes like Clostridia and Erysipelotrichia decreased with frailty, while Bacteroidia and Actinobacteria increased. At the family level, Oscillospiraceae showed a positive correlation with frailty. Functionally, we identified significant correlations between frailty measures and specific metabolic pathways. The frailty index negatively correlated with pathways involved in cobalamin, arginine and molybdenum cofactor biosynthesis and positively correlated with folate biosynthesis. Physical performance measures strongly correlated with pathways related to nucleotide biosynthesis, and one-carbon metabolism. We propose these identified features may constitute a "frailty-associated metabolic signature" in the gut microbiome. This signature suggests multiple interconnected mechanisms through which the microbiome may influence frailty development, including modulation of inflammation, alterations in energy metabolism, and potential impacts on muscle function through microbial metabolites.}, }
@article {pmid39653697, year = {2024}, author = {Palladino, G and Nanetti, E and Scicchitano, D and Cinti, N and Foresto, L and Cozzi, A and Gonzalez Vara Rodriguez, A and Interino, N and Fiori, J and Turroni, S and Candela, M and Rampelli, S}, title = {Zonation of the Vitis vinifera microbiome in Vino Nobile di Montepulciano PDO production area.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1626}, pmid = {39653697}, issn = {2399-3642}, support = {818290//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; }, mesh = {*Vitis/microbiology ; *Microbiota/genetics ; Italy ; *Wine/microbiology ; Soil Microbiology ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Fungi/genetics/classification/metabolism ; Rhizosphere ; }, abstract = {The microbial dimension of the terroir is crucial for wine quality, as microbiomes contribute to plant biofertilization, stress tolerance and pathogen suppression. While microbial terroir can act as a biological signature at large scale, data for local contexts is lacking, hindering the characterization of regional microbial diversity in vineyards. Here, we define the microbial terroir of vineyards across the 12 sub-areas (Additional Geographic Units -AGUs) of the "Consorzio del Vino Nobile di Montepulciano DOCG" PDO area (Italy), a world-renowned wine-producing region. Rhizospheres of Vitis vinifera cultivar Sangiovese and soil samples were collected throughout the 2022 viticultural season and analyzed through an integrated metabarcoding/shotgun metagenomic approach, targeting bacteria and fungi. Wine metabolomics was also perfomed, projecting compositional and functional variations of the microbial terroir at the AGUs level into a corresponding variation in the product metabolic profile. Our findings reveal a unique taxonomic configuration of the Vino Nobile di Montepulciano terroir compared to other vineyards, with microbiomes being "AGU-specific" in taxonomic abundances and plant growth-promoting functions, confirming the potential relevance of characterizing and preserving the microbial terroir to safeguard high-quality traditional wines.}, }
@article {pmid39653684, year = {2024}, author = {Chen, Y and Yang, C and Deng, Z and Xiang, T and Tan, J and Xu, J and Sun, D and Luo, F}, title = {Alterations of gut virome with close interaction in the progression of estrogen deficiency-induced osteoporosis.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2437250}, pmid = {39653684}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome ; Animals ; Female ; *Virome ; Mice ; *Osteoporosis/virology ; Humans ; *Estrogens/metabolism ; Ovariectomy ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Mice, Inbred C57BL ; Disease Models, Animal ; Disease Progression ; }, abstract = {Previous research has established a link between gut microbiota and osteoporosis (OP) advancement. However, there remains a limited understanding of the crucial contribution of the gut virome in the onset and progression of OP. We employed metagenomic shotgun sequencing and gut virome sequencing to process the ovariectomy (OVX)-induced OP murine model, which revealed significant disparities in bacteriome and virome compositions between subjects with OP and healthy controls. One hundred and seventy-four altered viral strains were identified to participate in the multifaceted regulation of bone loss, involving immune modulation, microbial metabolic activity, and intricate host-virus dynamics. Our findings suggested that the gut virome may influence bone metabolism, potentially altering the balance of bone-modulating compounds like short-chain fatty acids. This comprehensive analysis of the gut virome in OP highlighted the diagnostic potential of combined gut viral and bacterial biomarkers for OP.}, }
@article {pmid39653637, year = {2025}, author = {Lepcha, A and Kumar, R and Dindhoria, K and Bhargava, B and Pati, AM and Kumar, R}, title = {Metagenomic insights into the functional potential of non-sanitary landfill microbiomes in the Indian Himalayan region, highlighting key plastic degrading genes.}, journal = {Journal of hazardous materials}, volume = {484}, number = {}, pages = {136642}, doi = {10.1016/j.jhazmat.2024.136642}, pmid = {39653637}, issn = {1873-3336}, mesh = {*Microbiota/genetics ; India ; *Waste Disposal Facilities ; Biodegradation, Environmental ; Metagenomics ; *Bacteria/genetics/metabolism/classification ; *Plastics/metabolism ; Soil Microbiology ; Metals, Heavy/metabolism ; }, abstract = {Solid waste management in the Indian Himalayan Region (IHR) is a growing challenge, intensified by increasing population and tourism, which strain non-sanitary landfills. This study investigates microbial diversity and functional capabilities within these landfills using a high-throughput shotgun metagenomic approach. Physicochemical analysis revealed that the Manali and Mandi landfill sites were under heavy metal contamination and thermal stress. Taxonomic annotation identified a dominance of bacterial phyla, including Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes, with genera like Pseudomonas and Bacillus prevalent. Squeezemeta analysis generated 9,216,983 open reading frames (ORFs) across the sampling sites, highlighting diverse metabolic potentials for heavy metal resistance and degrading organic, xenobiotics and plastic wastes. Hierarchical clustering and principal component analysis (PCA) identified distinct gene clusters in Manali and Mandi landfill sites, reflecting differences in pollution profiles. Functional redundancy of landfill microbiome was observed with notable xenobiotic and plastic degradation pathways. This is the first comprehensive metagenomic assessment of non-sanitary landfills in the IHR, providing valuable insights into the microbial roles in degrading persistent pollutants, plastic waste, and other contaminants in these stressed environments.}, }
@article {pmid39653411, year = {2025}, author = {Shi, Z and Li, M and Zhang, C and Li, H and Zhang, Y and Zhang, L and Li, X and Li, L and Wang, X and Fu, X and Sun, Z and Zhang, X and Tian, L and Zhang, M and Chen, WH and Li, Z}, title = {Butyrate-producing Faecalibacterium prausnitzii suppresses natural killer/T-cell lymphoma by dampening the JAK-STAT pathway.}, journal = {Gut}, volume = {74}, number = {4}, pages = {557-570}, pmid = {39653411}, issn = {1468-3288}, mesh = {Humans ; Animals ; Mice ; *Gastrointestinal Microbiome ; *Faecalibacterium prausnitzii/metabolism ; Female ; Male ; Cross-Sectional Studies ; Probiotics ; *Butyrates/metabolism ; Signal Transduction ; Middle Aged ; *Janus Kinases/metabolism ; *STAT Transcription Factors/metabolism ; Dysbiosis/microbiology ; Cell Line, Tumor ; }, abstract = {BACKGROUND: Natural killer/T-cell lymphoma (NKTCL) is a highly aggressive malignancy with a dismal prognosis, and gaps remain in understanding the determinants influencing disease outcomes.<br><br>OBJECTIVE: To characterise the gut microbiota feature and identify potential probiotics that could ameliorate the development of NKTCL.<br><br>DESIGN: This cross-sectional study employed shotgun metagenomic sequencing to profile the gut microbiota in two Chinese NKTCL cohorts, with validation conducted in an independent Korean cohort. Univariable and multivariable Cox proportional hazards analyses were applied to assess associations between identified marker species and patient outcomes. Tumour-suppressing effects were investigated using comprehensive in vivo and in vitro models. In addition, metabolomics, RNA sequencing, chromatin immunoprecipitation sequencing, Western blot analysis, immunohistochemistry and lentiviral-mediated gene knockdown system were used to elucidate the underlying mechanisms.<br><br>RESULTS: We first unveiled significant gut microbiota dysbiosis in NKTCL patients, prominently marked by a notable reduction in Faecalibacterium prausnitzii which correlated strongly with shorter survival among patients. Subsequently, we substantiated the antitumour properties of F. prausnitzii in NKTCL mouse models. Furthermore, F. prausnitzii culture supernatant demonstrated significant efficacy in inhibiting NKTCL cell growth. Metabolomics analysis revealed butyrate as a critical metabolite underlying these tumour-suppressing effects, validated in three human NKTCL cell lines and multiple tumour-bearing mouse models. Mechanistically, butyrate suppressed the activation of Janus kinase-signal transducer and activator of transcription pathway through enhancing histone acetylation, promoting the expression of suppressor of cytokine signalling 1.<br><br>CONCLUSION: These findings uncover a distinctive gut microbiota profile in NKTCL and provide a novel perspective on leveraging the therapeutic potential of F. prausnitzii to ameliorate this malignancy.}, }
@article {pmid39651865, year = {2025}, author = {Howland, KE and Mouradian, JJ and Uzarski, DR and Henson, MW and Uzarski, DG and Learman, DR}, title = {Nutrient amendments enrich microbial hydrocarbon degradation metagenomic potential in freshwater coastal wetland microcosm experiments.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0197224}, pmid = {39651865}, issn = {1098-5336}, mesh = {*Wetlands ; *Hydrocarbons/metabolism ; Biodegradation, Environmental ; *Bacteria/metabolism/genetics/classification ; *Fresh Water/microbiology ; Metagenomics ; *Metagenome ; *Nutrients/metabolism ; Petroleum/metabolism ; Volatile Organic Compounds/metabolism ; Microbiota ; *Water Pollutants, Chemical/metabolism ; Geologic Sediments/microbiology ; }, abstract = {UNLABELLED: Biostimulating native microbes with fertilizers has proven to be a highly effective strategy to speed up biodegradation rates in microbial communities. This study investigates the genetic potential of microbes to degrade light synthetic crude oil in a freshwater coastal wetland. Experimental sediment microcosms were exposed to a variety of conditions (biological control, a light synthetic crude oil amendment, and light synthetic crude oil with nutrient amendment) and incubated for 30 days before volatile organic compounds (BTEX) were quantified and DNA was sequenced for metagenomic analysis. The resulting DNA sequences were binned into metagenome-assembled genomes (MAGs). Analyses of MAGs uncovered a 13-fold significant increase in the abundance of rate-limiting hydrocarbon degrading monooxygenases and dioxygenases, identified only in MAGs from the light synthetic crude oil with nutrient amendments. Further, complete degradation pathways for BTEX compounds were found only in MAGs resulting from the light synthetic crude with nutrient amendment. Moreover, volatile organic compounds (BTEX, cyclohexane, and naphthalene) analyses of microcosm sediments in the presence of nutrients documented that benzene was degraded below detection limits, toluene (98%) and ethylbenzene (67%) were predominantly reduced within 30 days. Results indicate that the genetic potential to degrade BTEX compounds in this freshwater wetland can be linked to the functional potential for bioremediation. BTEX compounds are typically more recalcitrant and tougher to degrade than alkanes. This study demonstrated that stimulating a microbial community with nutrients to enhance its ability to biodegrade hydrocarbons, even in a relatively nutrient-rich habitat like a freshwater wetland, is an effective remediation tactic.<br><br>IMPORTANCE: The impact of oil spills in a freshwater aquatic environment can pose dire social, economic, and ecological effects on the region. An oil spill in the Laurentian Great Lakes region has the potential to affect the drinking water of more than 30 million people. The light synthetic crude oil used in this experimental microcosm study is transported through an underground pipeline crossing the waterway between two Laurentian Great Lakes. This study collected metagenomic data (experiments in triplicate) and assessed the quantity of BTEX compounds, which connected microbial degradation function to gene potential. The resulting data documented the bioremediation capabilities of native microbes in a freshwater coastal wetland. This study also provided evidence for this region that bioremediation can be a viable remediation strategy instead of invasive physical methods.}, }
@article {pmid39648978, year = {2025}, author = {Ribero, MN and Schiaffino, MR and Filloy, J}, title = {Grassland Afforestation Drives Biotic Homogenisation of Soil Microbial Communities at a Regional Scale.}, journal = {Molecular ecology}, volume = {34}, number = {2}, pages = {e17617}, doi = {10.1111/mec.17617}, pmid = {39648978}, issn = {1365-294X}, support = {2018//Secretar&#xed;a de Ciencia y T&#xe9;cnica, Universidad de Buenos Aires/ ; //Neotropical Grassland Conservancy/ ; PICT 2017//Agencia Nacional de Promoci&#xf3;n Cient&#xed;fica y Tecnol&#xf3;gica/ ; //Consejo Nacional de Investigaciones Cient&#xed;ficas y T&#xe9;cnicas/ ; }, mesh = {*Soil Microbiology ; *Grassland ; *Biodiversity ; Argentina ; *Microbiota/genetics ; *Fungi/genetics/classification ; Bacteria/genetics/classification ; RNA, Ribosomal, 16S/genetics ; Soil/chemistry ; }, abstract = {Grassland afforestation poses a threat to biodiversity beyond land-use conversion. Diversity patterns are shaped by temporal dynamics, particularly, time since afforestation can decline beta diversity and lead to biotic homogenisation. Our study examines the effect of grassland afforestation on soil prokaryotic and fungal beta diversity. We evaluate the contributions of colonisation and extinction processes to beta diversity, as well as the replacement of endemic species by ubiquitous ones. Along a 200 km climatic gradient in Argentina's Pampas region, we analysed grasslands and mature eucalypt plantations at different times since afforestation. Soil samples were collected at each site and analysed using 16S (V3-V4) and ITS2 amplicon sequencing to identify prokaryotic and fungal communities, respectively. The analyses revealed biotic homogenisation at the transition from grassland to newly planted stands, evidenced by a decrease in intratreatment beta diversity. Increasing time since afforestation did not exacerbate this decline. However, our findings indicate that there are different responses between prokaryotes and fungi. The homogenisation of prokaryotes in young stands is due to the low heterogeneity in colonising communities. On the other hand, the decline in fungal beta diversity is likely caused by other mechanisms beyond extinction or replacement. The study highlights the impacts of the afforestation process on the beta diversity of soil microbial communities of grasslands, affecting taxonomic groups in different ways. Although microbial diversity may be partially restored in time in eucalypt plantations, it is important to investigate its underlying mechanisms and the ecological implications for microbial diversity and its spatial distribution.}, }
@article {pmid39647796, year = {2025}, author = {Zhu, Y and Zhao, S and Qi, S and Zhang, H and Zhang, X and Li, S and Wang, X and Gu, J and Zhang, T and Xi, H and Liu, X}, title = {Effects of energetic compounds on soil microbial communities and functional genes at a typical ammunition demolition site.}, journal = {Chemosphere}, volume = {370}, number = {}, pages = {143913}, doi = {10.1016/j.chemosphere.2024.143913}, pmid = {39647796}, issn = {1879-1298}, mesh = {*Soil Microbiology ; Triazines/toxicity/analysis ; *Soil Pollutants/toxicity/analysis ; Trinitrotoluene/toxicity ; Azocines/toxicity ; *Microbiota/drug effects ; Explosive Agents/toxicity ; Bacteria/genetics ; }, abstract = {High concentrations of energetic compounds such as 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) in military-contaminated sites pose a serious threat to human health and ecosystems. Better understanding about their effects on microbial diversity and functional genes in soil of ammunition demolition sites is required. In this study, the information of soil microbial community composition was obtained by metagenomic sequencing, and the impacts of energetic compounds on microbial community structure at the level of functional genes and enzymes based on Nr (Non-Redundant Protein Sequence Database), KEGG (Kyoto Encyclopedia of Genes and Genomes), CAZy (Carbohydrate-Active enZymes Database) and other databases were discussed. The results showed that soil microbial diversity and functional gene abundance decreased significantly with the increase of the concentrations of energetic compounds. Conversely, the relative abundance of Proteobacteria increased significantly, reaching over 80% in the heavily TNT-contaminated area near explosive-wastewater pool. Furthermore, functional gene analysis indicated that Proteobacteria had an advantage in degrading energetic compounds, and thus had the potential to improve the soil quality at ammunition demolition sites. This study provides a scientific basis for the future remediation and management of contaminated soils at ammunition demolition sites, as well as for the selection of efficient degraders of energetic compounds.}, }
@article {pmid39647426, year = {2025}, author = {Ge, H and Li, C and Huang, C and Zhao, L and Cong, B and Liu, S}, title = {Bacterial community composition and metabolic characteristics of three representative marine areas in northern China.}, journal = {Marine environmental research}, volume = {204}, number = {}, pages = {106892}, doi = {10.1016/j.marenvres.2024.106892}, pmid = {39647426}, issn = {1879-0291}, mesh = {China ; *Bacteria/metabolism/classification ; *Geologic Sediments/microbiology ; *Microbiota ; Ecosystem ; Seawater/microbiology ; Biodiversity ; Estuaries ; }, abstract = {Bacteria are essential components of ecosystems, participating in nutrient cycling and biogeochemical processes, and playing a crucial role in maintaining the stability of marine ecosystems. However, the biogeographic distribution patterns of bacterial diversity and metabolic functions in the estuarine and coastal areas of northern China remain unclear. Here, we used metagenomic sequencing to investigate the bacterial community composition and metabolic functions in sediments from the adjacent waters of the Yellow River Estuary, the Yellow Sea Cold Water Mass, and the adjacent waters of the Yangtze River Estuary. Among the 9164 species that were found, the most dominant microbial communities are Pseudomonadota, Actinomycetota, Bacteroidota, and Bacillota, but there are significant differences in the species composition in these three typical habitats. Amino acid metabolism and carbohydrate metabolic pathways were highly enriched. Glycoside hydrolases (GHs) predominate in carbon metabolism across all samples. In nitrogen metabolic pathway, genes related to organic degradation and synthesis are more abundant in the Yellow River Estuary than the other two habitats. In sulfur metabolic pathway, genes involved in assimilatory sulfate reduction are significantly enriched. Assimilatory sulfate reduction might be crucial for sulfur metabolism in coastal regions, with a full assimilatory nitrate reduction pathway found in Desulfobacterota. This research offers insights into the compositional diversity, metabolic functions, and biogeographic distribution patterns of bacterial communities in sediments from typical marine areas of northern China.}, }
@article {pmid39647412, year = {2024}, author = {He, T and Xie, J and Jin, L and Zhao, J and Zhang, X and Liu, H and Li, XD}, title = {Seasonal dynamics of the phage-bacterium linkage and associated antibiotic resistome in airborne PM2.5 of urban areas.}, journal = {Environment international}, volume = {194}, number = {}, pages = {109155}, doi = {10.1016/j.envint.2024.109155}, pmid = {39647412}, issn = {1873-6750}, mesh = {*Bacteriophages/genetics ; *Particulate Matter ; China ; *Bacteria/genetics/drug effects ; *Seasons ; Humans ; Air Microbiology ; Cities ; Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents/pharmacology ; Air Pollutants/analysis ; Metagenomics ; Drug Resistance, Bacterial/genetics ; Microbiota ; }, abstract = {Inhalable microorganisms in airborne fine particulate matter (PM2.5), including bacteria and phages, are major carriers of antibiotic resistance genes (ARGs) with strong ecological linkages and potential health implications for urban populations. A full-spectrum study on ARG carriers and phage-bacterium linkages will shed light on the environmental processes of antibiotic resistance from airborne dissemination to the human lung microbiome. Our metagenomic study reveals the seasonal dynamics of phage communities in PM2.5, their impacts on clinically important ARGs, and potential implications for the human respiratory microbiome in selected cities of China. Gene-sharing network comparisons show that air harbours a distinct phage community connected to human- and water-associated viromes, with 57 % of the predicted hosts being potential bacterial pathogens. The ARGs of common antibiotics, e.g., peptide and tetracycline, dominate both the antibiotic resistome associated with bacteria and phages in PM2.5. Over 60 % of the predicted hosts of vARG-carrying phages are potential bacterial pathogens, and about 67 % of these hosts have not been discovered as direct carriers of the same ARGs. The profiles of ARG-carrying phages are distinct among urban sites, but show a significant enrichment in abundance, diversity, temperate lifestyle, and matches of CRISPR (short for 'clustered regularly interspaced short palindromic repeats') to identified bacterial genomes in winter and spring. Moreover, phages putatively carry 52 % of the total mobile genetic element (MGE)-ARG pairs with a unique 'flu season' pattern in urban areas. This study highlights the role that phages play in the airborne dissemination of ARGs and their delivery of ARGs to specific opportunistic pathogens in human lungs, independent of other pathways of horizontal gene transfer. Natural and anthropogenic stressors, particularly wind speed, UV index, and level of ozone, potentially explained over 80 % of the seasonal dynamics of phage-bacterial pathogen linkages on antibiotic resistance. Therefore, understanding the phage-host linkages in airborne PM2.5, the full-spectrum of antibiotic resistomes, and the potential human pathogens involved, will be of benefit to protect human health in urban areas.}, }
@article {pmid39647263, year = {2025}, author = {Fu, Y and Gou, W and Zhong, H and Tian, Y and Zhao, H and Liang, X and Shuai, M and Zhuo, LB and Jiang, Z and Tang, J and Ordovas, JM and Chen, YM and Zheng, JS}, title = {Diet-gut microbiome interaction and its impact on host blood glucose homeostasis: a series of nutritional n-of-1 trials.}, journal = {EBioMedicine}, volume = {111}, number = {}, pages = {105483}, pmid = {39647263}, issn = {2352-3964}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Blood Glucose/metabolism ; Male ; *Homeostasis ; Female ; Adult ; *Diet ; Middle Aged ; Metagenomics/methods ; Metagenome ; }, abstract = {BACKGROUND: The interplay between diet and gut microbiome substantially influences host metabolism, but uncertainties remain regarding their relationships tailored for each subject given the huge inter-individual variability. Here we aim to investigate diet-gut microbiome interaction at single-subject resolution and explore its effects on blood glucose homeostasis.<br><br>METHODS: We conducted a series of nutritional n-of-1 trials (NCT04125602), in which 30 participants were assigned high-carbohydrate (HC) and low-carbohydrate (LC) diets in a randomized sequence across 3 pair of cross-over periods lasting 72 days. We used shotgun metagenomic sequencing and continuous glucose monitoring systems to profile the gut microbiome and blood glucose, respectively. An independent cohort of 1219 participants with available metagenomics data are included as a validation cohort.<br><br>FINDINGS: We demonstrated that the gut microbiome exhibited both intra-individually dynamic and inter-individually personalized signatures during the interventions. At the single-subject resolution, we observed person-specific response patterns of gut microbiota to interventional diets. Furthermore, we discovered a personal gut microbial signature represented by a carb-sensitivity score, which was closely correlated with glycemic phenotypes during the HC intervention, but not LC intervention. We validate the role of this score in the validation cohort and find that it reflects host glycemic sensitivity to the personal gut microbiota profile when sensing the dietary carbohydrate inputs.<br><br>INTERPRETATION: Our finding suggests that the HC diet modulates gut microbiota in a person-specific manner and facilitates the connection between gut microbiota and glycemic sensitivity. This study represents a new paradigm for investigating the diet-microbiome interaction in the context of precision nutrition.<br><br>FUNDING: This work was supported by the National Key R&amp;D Program of China, National Natural Science Foundation of China and Zhejiang Provincial Natural Science Foundation of China.}, }
@article {pmid39644773, year = {2025}, author = {Hu, Y and Hu, X and Jiang, L and Luo, J and Huang, J and Sun, Y and Qiao, Y and Wu, H and Zhou, S and Li, H and Li, J and Zhou, L and Zheng, S}, title = {Microbiome and metabolomics reveal the effect of gut microbiota on liver regeneration of fatty liver disease.}, journal = {EBioMedicine}, volume = {111}, number = {}, pages = {105482}, pmid = {39644773}, issn = {2352-3964}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Liver Regeneration ; *Metabolomics/methods ; Mice ; Diet, High-Fat/adverse effects ; *Fatty Liver/metabolism/etiology/pathology/microbiology ; Male ; Disease Models, Animal ; Liver/metabolism/pathology ; *Metabolome ; RNA, Ribosomal, 16S/genetics ; Mice, Inbred C57BL ; *Non-alcoholic Fatty Liver Disease/metabolism ; Metagenomics/methods ; Hepatectomy ; }, abstract = {BACKGROUND: Metabolic dysfunction-associated fatty liver disease (MAFLD) is associated with impaired regenerative capacity and poor postoperative prognosis following hepatectomy. Previous research has highlighted the importance of the gut-liver axis in the physiological and pathological processes of the liver. However, the contribution of gut bacteria to the regeneration of livers with MAFLD and its metabolic regulatory mechanisms remain elusive.<br><br>METHODS: Partial hepatectomy (PHx) was performed on C57Bl/6J mice fed with high-fat diet (HFD) for 12 weeks. Pathological examination, immunohistochemistry, and qRT-PCR analysis were performed to assess the severity of steatosis and proliferative potential. The gut microbiome was examined by 16S rRNA gene sequencing and shotgun metagenomics, whereas liver metabolomics was analysed via untargeted and targeted metabolomics using liquid chromatography-tandem mass spectrometry (LC-MS).<br><br>FINDINGS: HFD-induced hepatic steatosis in mice led to impaired liver regeneration following PHx. The gut microbiota and liver metabolites were altered along with the liver regeneration process. Longitudinal time-series analysis revealed dynamic alterations in these data, whereas correlation analysis screened out bacterial candidates that potentially influence liver regeneration in MAFLD by modulating metabolic pathways. Among these bacteria, the dominant bacterium Akkermansia was selected for subsequent investigation. MAFLD mice gavaged with Akkermansia muciniphila (A.&#xa0;muciniphila) exhibited reduced liver lipid accumulation and accelerated liver regeneration, possibly through the regulation of the tricarboxylic acid (TCA) cycle.<br><br>INTERPRETATION: These data demonstrated the interplay between the gut microbiome, liver metabolomics, and liver regeneration in mice with MAFLD. A.&#xa0;muciniphila has the potential to serve as a clinical intervention agent to accelerate postoperative recovery in MAFLD.<br><br>FUNDING: This work was supported by the Research Project of Jinan Microecological Biomedicine Shandong Laboratory [JNL-2022008B]; the Zhejiang Provincial Natural Science Foundation of China [LZ21H180001]; the Fundamental Research Funds for the Central Universities [No. 2022ZFJH003].}, }
@article {pmid39643877, year = {2024}, author = {Cui, Z and Wang, S and Niu, J and Ma, J and Yang, H}, title = {Bifidobacterium species serve as key gut microbiome regulators after intervention in gestational diabetes mellitus.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {520}, pmid = {39643877}, issn = {1471-2180}, support = {22cz020401-4811009//National High Level Hospital Clinical Research/ ; 81830044//National Natural Science Foundation of China/ ; 2021YFC2700700//National Key Research and Development Program of China/ ; }, mesh = {Humans ; *Diabetes, Gestational/microbiology/metabolism/blood ; Pregnancy ; *Gastrointestinal Microbiome/genetics ; Female ; *Bifidobacterium/genetics ; Adult ; *Feces/microbiology ; Fatty Acids, Volatile/metabolism ; Dysbiosis/microbiology ; Genome-Wide Association Study ; Metagenome ; }, abstract = {Gut microbiome dysbiosis is associated with gestational diabetes mellitus (GDM), and its modulation represents a promising approach for enhancing glycemic control. In this study, we aimed to discover specific alterations in the gut microbiome through lifestyle management. We performed metagenome sequencing on fecal samples and measured short-chain fatty acid (SCFA) in plasma samples from 27 well-controlled GDM pregnancies before and after glycemic control. At the same time, 38 normal glucose tolerance (NGT) samples served as controls. Additionally, we employed two-sample Mendelian Randomization (MR) to validate our findings against Genome-Wide Association Study (GWAS) database. Our dynamic analysis revealed Bifidobacterium genus increased in GDM patients after intervention. The MR analysis confirmed that the family of Bifidobacteriaceae (OR 0.929, 95% CI, 0.886-0.975; P = 0.003) was the only negatively associated family with GDM. Further analysis indicated the increased abundance of Bifidobacterium species were negatively correlated with glycemic traits (Spearman rho mean - 0.32 ± 0.34) but positively correlated with plasma SCFA levels (Spearman rho mean 0.24 ± 0.19). Functional analysis revealed that the quorum-sensing pathway had the strongest effect on the ability of Bifidobacterium to promote glucose homeostasis (Spearman rho = -0.34), suggesting its role in regulating intestinal microbiota. Finally, the multivariable MR analysis demonstrated that two pathways, COLANSYN PWY and PWY 7323, responsible for cell surface compound synthesis in gram-negative bacteria, mediated 14.83% (P = 0.017) and 16.64% (P = 0.049) of the protective effects of Bifidobacteriaceae against GDM, respectively. In summary, Bifidobacterium is an effective gut microbiota regulator for GDM-related glucose homeostasis.}, }
@article {pmid39643526, year = {2025}, author = {Yen, TY and Hsu, C and Lee, NC and Wu, CS and Wang, H and Lee, KY and Lin, CR and Lu, CY and Tsai, ML and Liu, TY and Lin, C and Chen, CY and Chang, LY and Lai, F and Huang, LM}, title = {Signatures of lower respiratory tract microbiome in children with severe community-acquired pneumonia using shotgun metagenomic sequencing.}, journal = {Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi}, volume = {58}, number = {1}, pages = {86-93}, doi = {10.1016/j.jmii.2024.11.011}, pmid = {39643526}, issn = {1995-9133}, mesh = {Humans ; *Community-Acquired Infections/microbiology ; Male ; Prospective Studies ; Female ; *Metagenomics/methods ; Child, Preschool ; *Microbiota/genetics ; Child ; Infant ; High-Throughput Nucleotide Sequencing ; *Pneumonia/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; *Respiratory System/microbiology ; Severity of Illness Index ; Metagenome ; Adolescent ; Community-Acquired Pneumonia ; }, abstract = {BACKGROUND: Severe community-acquired pneumonia was associated with high morbidity and mortality in children. However, species-level microbiome of lower airway was sparse, and we used shotgun metagenomic next-generation sequencing to explore microbial signatures.<br><br>METHODS: We conducted a prospective cohort study to recruit children under 18 who required admission to an intensive care unit for community-acquired pneumonia between December 2019 and February 2022. Lower respiratory specimens were collected on admission for shotgun metagenomic sequencing. The children were divided into two groups. Critical cases were patients with respiratory failure requiring endotracheal ventilator support, and severe cases did not require intubation. Signatures of lower respiratory tract microbiome were compared between groups using an exact k-mer matching metagenomic analysis pipeline (Kraken 2) and a metagenome-assembled genomes pipeline (MetaWRAP).<br><br>RESULTS: Totally 66 children were enrolled, and 27 children were critical cases, and the rest were severe cases. There were significant differences in microbial community structure between different severity groups, and microbial abundance was negatively correlated with disease severity. The results showed that Haemophilus influenzae was more prominent in children who were critical, accompanied with increased expression of intracellular transport, secretion, and vesicle transport genes. Rothia mucilaginosa, Dolosigranulum pigrum, and Prevotella melaninogenica tended to be present in less severe community-acquired pneumonia group.<br><br>CONCLUSION: This study demonstrated that significantly different microbial community was associated with severity of community-acquired pneumonia requiring intensive care admission. Species-level shotgun metagenomic sequencing facilitates the exploration of potentially pathogenic or protective microbes and shed the light of probiotic development in lower respiratory tract.}, }
@article {pmid39643486, year = {2025}, author = {Reyes-Sosa, MB and Valle-Gough, R and Ponce-Caballero, MDC and Arena-Ortiz, ML}, title = {Bacterial richness assessment in water and sediments in the northern coast of the Yucatan Peninsula.}, journal = {Revista Argentina de microbiologia}, volume = {57}, number = {2}, pages = {171-181}, doi = {10.1016/j.ram.2024.10.009}, pmid = {39643486}, issn = {0325-7541}, mesh = {*Geologic Sediments/microbiology ; *Water Microbiology ; Mexico ; *Bacteria/isolation &amp; purification/classification/genetics ; *Biodiversity ; *Seawater/microbiology ; RNA, Ribosomal, 16S/genetics ; Wetlands ; Microbiota ; }, abstract = {Given the importance of the coastal environments and the multiple ecological services that they provide, it is important to explore and understand the interactions that occur within them. The microbiome is a key factor for the understanding of the dynamics of these fragile sites. A metagenomic study based on the profiling of the 16S ribosomal gene was carried out in order to assess the bacterial diversity present in the northern coastal zone of the Yucatan Peninsula. The results showed that water and sediment samples share some similarities regarding the bacterial genera found, only differing in the quantitative part. Through a PCO (principal coordinates) analysis clear differences between sediment and water samples could be observed. The highest relative diversity was found in wetland and lagoon sediment samples, respectively. It was observed that 3-8% of the total sequence reads belonged to opportunistic genera such as: Vibrio in the sea samples and Capnocytophaga in the other environments. Salinity and pH were the factors which contributed the most to the differences among the communities in the various environments in the coastal zone. There is an important similarity in the sediments across the different environments within the studied coastal zone. The data presented herein contribute to setting a baseline for research in the coastal region of the Yucatan Peninsula.}, }
@article {pmid39643362, year = {2024}, author = {Shen, C and Yu, Y and Zhang, X and Zhang, H and Chu, M and Yuan, B and Guo, Y and Li, Y and Zhou, J and Mao, J and Xu, X}, title = {The dynamic of physicochemical properties, volatile compounds and microbial community during the fermentation of Chinese rice wine with diverse cereals.}, journal = {Food research international (Ottawa, Ont.)}, volume = {198}, number = {}, pages = {115319}, doi = {10.1016/j.foodres.2024.115319}, pmid = {39643362}, issn = {1873-7145}, mesh = {Amino Acids/analysis/metabolism ; Bacteria/classification/metabolism ; Edible Grain/chemistry/microbiology ; Esters/analysis/metabolism ; *Fermentation ; Gas Chromatography-Mass Spectrometry ; Microbiota ; *Odorants/analysis ; *Oryza/chemistry ; Taste ; *Volatile Organic Compounds/analysis ; *Wine/analysis/microbiology ; }, abstract = {This study investigates the impact of liquid state fermentation on the key flavor compounds and microbial community structure in Chinese rice wine brewed from five different raw materials: buckwheat, sorghum, japonica rice, glutinous rice, and black rice. Using HS-SPME-GC-MS and HPLC, the volatile compounds were analyzed across various grain liquefaction methods, detecting 82 volatiles, including esters, alcohols, aldehydes, and acids. The concentration of flavor compounds such as esters, amino acids, phenolic acids, and organic acids varied significantly depending on the raw material used. Based on odor activity values, 31 key compounds were identified, including 15 ethyl esters, like ethyl laurate, responsible for the unique and complex aroma of the rice wines. Bitter amino acids, making up over 50 % of the total amino acids, were predominant. Among the varieties, the buckwheat-fermented wine exhibited the highest ester content (27.39 mg/L), nearly double that of other samples, along with elevated amino acids (1.47 mg/mL) and phenolic acids (904.29 mg/L). Black rice ranked second in amino acid content (0.93 mg/mL), while glutinous rice had the highest organic acid content (239.76 mg/mL). Metagenomic sequencing on the fifth day of fermentation revealed significant differences in microbial community structure among the raw materials. Saccharomyces, Aspergillus, Thermomyces, Epicoccus, and Albertella were dominant fungi, while Weissella, Thermoactinomyces, Bacillus, and Saccharopolyspora were dominant bacteria. Sensory analysis showed that buckwheat-fermented rice wine was distinguished by its honey, floral, creamy, and umami attributes, while balancing alcohol, acidity, bitterness, and Qu aroma. The results demonstrate the significant influence of raw material selection and liquefaction method on both flavor profile and microbial diversity in Chinese rice wine.}, }
@article {pmid39643360, year = {2024}, author = {Li, N and Xu, W and Meng, L and Zhao, Y and Zhao, X and Zheng, N and Zhang, Y and Wang, J}, title = {Metagenomics reveals differences in spore-forming bacterial diversity in raw milk in different regions and seasons in China.}, journal = {Food research international (Ottawa, Ont.)}, volume = {198}, number = {}, pages = {115317}, doi = {10.1016/j.foodres.2024.115317}, pmid = {39643360}, issn = {1873-7145}, mesh = {*Seasons ; Animals ; *Milk/microbiology ; China ; *Spores, Bacterial/genetics ; *Metagenomics ; Food Microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Biodiversity ; }, abstract = {The spore-forming bacteria in the dairy industry are notable for their spores resilience and capacity to survive heating processes, allowing them to germinate and enter the vegetative stage, potentially leading to spoilage of the milk. Additionally, these spores can form biofilms, becoming a persistent source of contamination in processing environments. In this study, we collected a total of 165 raw milk from six different parts in China in spring, summer, autumn, and winter, respectively. Metagenomics sequencing method was used to explore and compare the differences in spore-forming bacterial composition and diversity in raw milk samples. Among these samples, four genera and 207 species of spore-forming bacteria were identified, with the genus Bacillus and the species Paenibacillus darwinianus dominant. Seasonal variations had a greater impact on the composition and abundance of spore-forming bacteria in raw milk than regional differences. Notable, raw milk samples collected during the spring and summer exhibited a higher number of unique spore-forming bacterial species compared to those collected in other seasons. Moreover, different regions and seasons have their own dominant bacteria. Metabolism of cofactors and vitamins, energy metabolism, carbohydrate metabolism, and amino acid metabolism were the main metabolic pathways. Hence, specific strategies need to be adopted to prevent and control spore-forming bacteria in raw milk in different regions and seasons.}, }
@article {pmid39643345, year = {2024}, author = {Jian, C and Sun, M and Ma, T and Wang, W and Lv, B and Wang, J and Su, X and Li, S and Guo, Y}, title = {Revealing the formation mechanisms of key flavor components during the fermentation of bamboo shoots by combining flavoromics and metagenomics.}, journal = {Food research international (Ottawa, Ont.)}, volume = {198}, number = {}, pages = {115361}, doi = {10.1016/j.foodres.2024.115361}, pmid = {39643345}, issn = {1873-7145}, mesh = {*Fermentation ; *Metagenomics ; *Taste ; *Volatile Organic Compounds/analysis/metabolism ; *Odorants/analysis ; *Metabolomics ; Flavoring Agents/metabolism ; Plant Shoots ; Fermented Foods/microbiology ; Bacteria/genetics/classification/metabolism ; Food Microbiology ; Amino Acids/analysis/metabolism ; Microbiota ; }, abstract = {Microbial metabolism plays a critical role in the flavor development of Guangxi fermented bamboo shoots (GFBS). To clarify the role of microorganisms in flavor formation and predict the metabolic pathways of key characteristic flavor compounds, this study employed metabolomics, Odor Activity Value (OAV), and Taste Activity Value (TAV) calculations, integrated with Partial Least Squares Discriminant Analysis (PLS-DA), to investigate changes in GFBS flavors-represented by volatile flavor compounds, organic acids, and free amino acids-across a 30-day fermentation period. Metagenomic datasets were used to identify taxonomic and functional changes in the microbial community. As a result, 26 characteristic flavor compounds (OAV or TAV > 1) were identified in mature GFBS, and 23 differential flavor compounds were identified at different fermentation stages using PLS-DA (VIP > 1.2). The top 10 microbial genera associated with these characteristic flavor compounds were identified, including Acinetobacter, Enterobacter, Raoultella, Enterococcus, Klebsiella, Lactococcus, Leuconostoc, Weissella, Lactiplantibacillus and Limosilactobacillus. Based on these findings, a predictive metabolic network of key flavor compounds in GFBS was constructed, providing a comprehensive understanding of the diverse metabolic roles of microorganisms during fermentation. This work lays a theoretical foundation for the standardized production and quality control of GFBS flavor.}, }
@article {pmid39643336, year = {2024}, author = {Li, T and Cao, W and Li, D and Wei, C and Yan, Y and Zeng, X}, title = {Metagenomic insights into quorum sensing-associated microbial profiling and its correlations with flavor compounds of Maotai-flavor liquor: A case study of stacking fermented grains.}, journal = {Food research international (Ottawa, Ont.)}, volume = {198}, number = {}, pages = {115324}, doi = {10.1016/j.foodres.2024.115324}, pmid = {39643336}, issn = {1873-7145}, mesh = {*Quorum Sensing ; *Fermentation ; *Flavoring Agents/metabolism ; *Metagenomics/methods ; Taste ; Food Microbiology ; Bacteria/genetics/metabolism/classification ; Fungi/genetics/metabolism ; Edible Grain/microbiology ; Alcoholic Beverages/microbiology ; Microbiota ; }, abstract = {Stacking fermentation is typical process of Maotai-flavor Baijiu and microbial composition determine content of flavors. To date, the knowledge on the driving force of microbial composition was as yet unknown. Since quorum sensing molecule (QSM) plays an important role in modifying microbial interactions. Therefore, the objectives of the present study were: (1) to describe the microbial profile associated with QSM in stacking grains using metagenomics; (2) to elucidate how QSM shapes microbial interactions and accordingly regulates flavor synthesis. Results indicated that bacterial QSM including AI-2, DSF, and AHL as well as fungal QSM aromatic alcohols and farnesol were prevalent in the stacking fermented grains. Thereinto, AI-2 might be an important driving force of microbial composition due to its highest abundance. AI-2 in Limosilactobacillus fermentum, Pediococcus pentosaceus, and Weissella cibaria perhaps modified microbial interactions together with fungal QSM in Schizosaccharomyces pombe and Pichia membranifaciens. The role of AI-2 was much higher than that of fungal QSM. Furthermore, QSM indirectly influenced the synthesis of important flavors such as ethyl lactate, phenylethanol, and ethyl phenylacetate through the dynamic of microbial composition. Together, this current study for the first time explored the effects of QSM on microbial composition and flavor synthesis in the Baijiu field.}, }
@article {pmid39643156, year = {2025}, author = {Wang, Y and Zeng, T and Tang, D and Cui, H and Wan, Y and Tang, H}, title = {Integrated Multi-Omics Analyses Reveal Lipid Metabolic Signature in Osteoarthritis.}, journal = {Journal of molecular biology}, volume = {437}, number = {6}, pages = {168888}, doi = {10.1016/j.jmb.2024.168888}, pmid = {39643156}, issn = {1089-8638}, mesh = {Humans ; *Lipid Metabolism/genetics ; *Osteoarthritis/metabolism/genetics/microbiology ; *Metabolomics/methods ; Chondrocytes/metabolism/pathology ; Male ; Metagenomics/methods ; Gastrointestinal Microbiome ; Female ; Middle Aged ; Aged ; Multiomics ; }, abstract = {Osteoarthritis (OA) is the most common degenerative joint disease and the second leading cause of disability worldwide. Single-omics analyses are far from elucidating the complex mechanisms of lipid metabolic dysfunction in OA. This study identified a shared lipid metabolic signature of OA by integrating metabolomics, single-cell and bulk RNA-seq, as well as metagenomics. Compared to the normal counterparts, cartilagesin OA patients exhibited significant depletion of homeostatic chondrocytes (HomCs) (P = 0.03) and showed lipid metabolic disorders in linoleic acid metabolism and glycerophospholipid metabolism which was consistent with our findings obtained from plasma metabolomics. Through high-dimensional weighted gene co-expression network analysis (hdWGCNA), weidentified PLA2G2A as a hub gene associated with lipid metabolic disorders in HomCs. And an OA-associated subtype of HomCs, namely HomC1 (marked by PLA2G2A, MT-CO1, MT-CO2, and MT-CO3) was identified, which also exhibited abnormal activation of lipid metabolic pathways. This suggests the involvement of HomC1 in OA progression through the shared lipid metabolism aberrancies, which were further validated via bulk RNA-Seq analysis. Metagenomic profiling identified specific gut microbial species significantly associated with the key lipid metabolism disorders, including Bacteroides uniformis (P < 0.001, R = -0.52), Klebsiella pneumonia (P = 0.003, R = 0.42), Intestinibacter_bartlettii (P = 0.009, R = 0.38), and Streptococcus anginosus (P = 0.009, R = 0.38). By integrating the multi-omics features, a random forest diagnostic model with outstanding performance was developed (AUC = 0.97). In summary, this study deciphered the crucial role of a integrated lipid metabolic signature in OA pathogenesis, and established a regulatory axis of gut microbiota-metabolites-cell-gene, providing new insights into the gut-joint axis and precision therapy for OA.}, }
@article {pmid39643107, year = {2025}, author = {Khedpande, N and Barve, K}, title = {Role of gut dysbiosis in drug-resistant epilepsy: Pathogenesis and available therapeutic strategies.}, journal = {Brain research}, volume = {1850}, number = {}, pages = {149385}, doi = {10.1016/j.brainres.2024.149385}, pmid = {39643107}, issn = {1872-6240}, mesh = {Humans ; *Dysbiosis/complications/physiopathology ; *Gastrointestinal Microbiome/physiology/drug effects ; *Drug Resistant Epilepsy/microbiology/drug therapy/physiopathology/therapy ; Anticonvulsants/therapeutic use ; Animals ; }, abstract = {Over 70 million people worldwide suffer from epilepsy, a persistent brain disorder. Although there are more than 20 antiseizure drugs available for the symptomatic treatment of epilepsy, about one-third of patients with epilepsy experience seizures that show resistance to pharmacotherapy. Since patients with drug-resistant epilepsy are more prone to physical injuries, psychosocial dysfunction, early death, and deteriorated life quality, the development of safer and more effective treatments is a crucial clinical need. The gut-brain axis and microbiome research advances have provided new insights into the pathophysiology of epilepsy, the resistance to anti-seizure medicine, and potential treatment targets. Inflammation, disturbance of the blood-brain barrier, and altered neurotransmitters are key pathways linked to gut dysbiosis. The characterization of microbial species and functional pathways has advanced thanks to metagenomic sequencing and high-throughput analysis. In this review, we elaborate on the gut-mediated molecular pathways involved in drug-resistant epilepsy, the gut- modulatory therapeutic options, and their combination with antiseizure medications for drug-resistant epilepsy.}, }
@article {pmid39642737, year = {2025}, author = {Medriano, CA and Kim, S and Kim, LH and Bae, S}, title = {Chronic Exposure of Adult Zebrafish to Polyethylene and Polyester-based Microplastics: Metabolomic and Gut Microbiome Alterations Reflecting Dysbiosis and Resilience.}, journal = {Journal of hazardous materials}, volume = {484}, number = {}, pages = {136691}, doi = {10.1016/j.jhazmat.2024.136691}, pmid = {39642737}, issn = {1873-3336}, mesh = {Animals ; *Zebrafish/metabolism/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Microplastics/toxicity ; *Polyesters/toxicity ; Metabolomics ; *Dysbiosis/chemically induced/metabolism ; *Water Pollutants, Chemical/toxicity ; *Polyethylene/toxicity ; }, abstract = {The study explored the ecotoxicological effects of chronic exposure to microplastic (MP) on adult zebrafish, focusing on environmentally relevant concentrations of polyethylene (PE) beads and polyester (PES). High-throughput untargeted metabolomics via UPLC-QToF-MS and 16S metagenomics for gut microbiota analysis were used to assess ecotoxicity in zebrafish exposed to varying concentrations of PE and PES. The VIP (Variable Importance in Projection) scores indicated PE exposure primarily impacted phospholipids, ceramides, and nucleotide-related compounds, while PES exposure led to alterations in lipid-related compounds, chitin, and amino acid derivatives. From MSEA (Metabolite Set Enrichment Analysis) and Mummichog analyses, PE and PES significantly disrupted key metabolomic pathways associated with inflammation, immune responses, and apoptosis, including leukotriene and arachidonic acid metabolism and the formation of putative anti-inflammatory metabolites from EPA. PE caused physical disruption and inflammation of the epithelial barrier, whereas PES affected gut microbiota interactions, impairing digestion and metabolism. Although alpha diversity within the gut microbiome remained stable, beta diversity analysis revealed significant shifts in microbial composition and structure, suggesting a disruption of functional balance and an increased susceptibility to pathogens. Chronic PE and PES exposures induced shifts in the gut microbial community and interaction network with potential increases in pathogenic bacteria and alteration in commensal bacteria, demonstrating the microbiome's resilience and adaptability to stressors of MPs exposure. High-throughput metabolomics and 16S metagenomics revealed potential chronic diseases associated with inflammation, immune system disorders, metabolic dysfunction, and gut dysbiosis, highlighting the complex relationship between gut microbiome resilience and metabolic disruption under MP-induced stress, with significant ecological implications.}, }
@article {pmid39642431, year = {2025}, author = {Bertini, F and Catania, V and Scirè Calabrisotto, L and Dara, M and Bisanti, L and La Corte, C and Staropoli, M and Piazzese, D and Parisi, MG and Parrinello, D and Cammarata, M}, title = {A multi-comprehensive approach to assess the responses of the Mediterranean mussel Mytilus galloprovincialis (Lamarck, 1919) to a simulation of a diesel-oil mixture spill.}, journal = {Aquatic toxicology (Amsterdam, Netherlands)}, volume = {279}, number = {}, pages = {107188}, doi = {10.1016/j.aquatox.2024.107188}, pmid = {39642431}, issn = {1879-1514}, mesh = {Animals ; *Mytilus/drug effects/physiology ; *Water Pollutants, Chemical/toxicity ; *Petroleum Pollution/adverse effects ; Hemolymph/drug effects ; Phagocytosis/drug effects ; *Hydrocarbons/toxicity ; Biomarkers/metabolism ; Gasoline/toxicity ; Microbiota/drug effects ; Environmental Monitoring ; }, abstract = {Oil spills are a major cause of pollution impacting marine ecosystems. In this work, the effects of short-term exposure to three different concentrations of a hydrocarbon mixture (HC), that simulated the action of such an event, were investigated on Mytilus galloprovincialis specimens. Physiological effects were measured using a battery of biomarkers consisting of cellular activity (phagocytosis), immune-related enzymes, chaperonins (HSP70 and HSC70), and histomorphological alterations. Different concentrations of HC led to a significant decrease in phagocytosis, especially following high concentrations. Immune-related enzymes evaluated in hemolymph and digestive gland extract showed up-regulation, suggesting the activation of antioxidant, detoxicant, and inflammatory responses. Morphological alterations of digestive gland tubules were observed after exposure to the HC. HSP70 and HSC70 activity was up regulated following the treatments, indicating their involvement in maintaining organism homeostasis. In addition, the diversity and composition of hemolymph and digestive gland microbiota exposed to HC were analyzed by automated ribosomal intergenic spacer analysis (ARISA) and a Next Generation Sequencing (NGS) approach to evaluate the connection with hydrocarbon contamination. Metagenomic analysis revealed significant differences in the hemolymph and digestive gland microbiota composition between mussels exposed and unexposed to HC. Exposure to increasing HC concentrations had a positive effect on microbial diversity with clear adaptative responses, and an increase in the relative abundance of several known degrading bacterial genera, including Alcanivorax, Roseovarius, Pseudomonas, Vibrio, Oleibacter. These results show the utility of a multi-comprehensive approach to evaluating functional adaptation in terms of immunological dysfunctions and microbiota alteration in the sentinel organism M. galloprovincialis.}, }
@article {pmid39641605, year = {2025}, author = {Bao, Z and Chen, B and Yu, K and Wei, Y and Liang, X and Yao, H and Liao, X and Xie, W and Yin, K}, title = {Microbiome dynamics and functional profiles in deep-sea wood-fall micro-ecosystem: insights into drive pattern of community assembly, biogeochemical processes, and lignocellulose degradation.}, journal = {Applied and environmental microbiology}, volume = {91}, number = {1}, pages = {e0216524}, pmid = {39641605}, issn = {1098-5336}, support = {42090041, 42030502//MOST | National Natural Science Foundation of China (NSFC)/ ; 42306165//MOST | National Natural Science Foundation of China (NSFC)/ ; No. 2023JJB150027//| Natural Science Foundation of Guangxi Zhuang Autonomous Region (Guangxi Natural Science Foundation)/ ; No. 311022005//Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; SML2021SP204, SML2023SP215, SML2023SP218, SML2023SP205//Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; }, mesh = {*Wood/microbiology ; *Lignin/metabolism ; *Microbiota ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; *Fungi/metabolism/classification/genetics/isolation &amp; purification ; China ; *Seawater/microbiology ; Ecosystem ; }, abstract = {Wood-fall micro-ecosystems contribute to biogeochemical processes in the oligotrophic deep ocean. However, the community assembly processes and biogeochemical functions of microbiomes in wood fall remain unclear. This study investigated the diversity, community structure, assembly processes, and functional profiles of bacteria and fungi in a deep-sea wood fall from the South China Sea using physicochemical indices, amplicon sequencing, and metagenomics. The results showed that distinct wood-fall contact surfaces exhibit habitat heterogeneity. The bacterial community of all contact surfaces and the fungal community of seawater contact surface (SWCS) were affected by homogeneous selection. In SWCS and transition region (TR), bacterial communities were influenced by dispersal limitation, whereas fungal communities were affected by homogenizing dispersal. The Venn diagram visualization revealed that the shared fungal community between SWCS and TR was dominated by Aspergillaceae. Additionally, the bacterial community demonstrated a higher genetic potential for sulfur, nitrogen, and methane metabolism than fungi. The sediment contact surface enriched modules were associated with dissimilatory sulfate reduction and methanogenesis, whereas the modules related to nitrate reduction exhibited enrichment characteristics in TR. Moreover, fungi showed a stronger potential for lignocellulase production compared to bacteria, with Microascaceae and Nectriaceae identified as potential contributors to lignocellulose degradation. These results indicate that environmental filtering and organism exchange levels regulated the microbial community assembly of wood fall. The biogeochemical cycling of sulfur, nitrogen, and methane was mainly driven by the bacterial community. Nevertheless, the terrestrial fungi Microascaceae and Nectriaceae might degrade lignocellulose via the combined action of multiple lignocellulases.IMPORTANCEThe presence and activity of microbial communities may play a crucial role in the biogeochemical cycle of deep-sea wood-fall micro-ecosystems. Previous studies on wood falls have focused on the microbiome diversity, community composition, and environmental impact, while few have investigated wood-fall micro-ecosystems by distinguishing among distinct contact surfaces. Our study investigated the microbiome dynamics and functional profiles of bacteria and fungi among distinct wood-fall contact surfaces. We found that the microbiome community assembly was regulated by environmental filtering and organism exchange levels. Bacteria drive the biogeochemical cycling of sulfur, nitrogen, and methane in wood fall through diverse metabolic pathways, whereas fungi are crucial for lignocellulose degradation. Ultimately, this study provides new insights into the driving pattern of community assembly, biogeochemical processes, and lignocellulose degradation in the microbiomes of deep-sea wood-fall micro-ecosystems, enhancing our comprehension of the ecological impacts of organic falls on deep-sea oligotrophic environments.}, }
@article {pmid39641169, year = {2025}, author = {Yang, J and Lei, OK and Bhute, S and Kris-Etherton, PM and Lichtenstein, AH and Matthan, NR and Petersen, KS and Sabaté, J and Reboussin, DM and Lovato, L and Vitolins, MZ and Rajaram, S and Jacobs, JP and Huang, J and Taw, M and Yang, S and Li, Z}, title = {Impact of daily avocado consumption on gut microbiota in adults with abdominal obesity: an ancillary study of HAT, a randomized controlled trial.}, journal = {Food &amp; function}, volume = {16}, number = {1}, pages = {168-180}, doi = {10.1039/d4fo03806a}, pmid = {39641169}, issn = {2042-650X}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Persea ; Female ; Male ; Adult ; Middle Aged ; *Obesity, Abdominal/diet therapy/metabolism/microbiology ; Feces/microbiology ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Diet ; }, abstract = {Objectives: This study aimed to investigate short-term and long-term impact of avocado consumption without caloric restriction on the gut microbiota of free-living adults with abdominal obesity. Methods: The Habitual Diet and Avocado Trial (HAT) was a 26-week, multi-center, randomized, controlled trial involving 1008 individuals with abdominal obesity. Participants were randomly assigned to the Avocado Supplemented Diet Group (AVO), receiving one avocado per day, or the Habitual Diet group (HAB), maintaining their usual dietary habits. Fecal samples were collected at baseline, week 4 and week 26 from a subset of participants recruited at a University of California Los Angeles site (n = 230). Fecal microbiota was assessed with shotgun metagenomics sequencing. Alpha diversity was assessed using the Chao1 and Shannon indices; beta diversity was assessed using Bray-Curtis dissimilarity with significance determined by repeated measures permutational multivariat analysis of variance. Potential association of intervention at week 4 and 26 with alpha diversity, species and metabolic pathways was examined using linear mixed effect models. Results: Compared to the HAB group, the AVO group had higher alpha diversity by 4 weeks, which persisted through the 26-week study period. Exploratory analysis based on healthy eating index-2015 (HEI-2015) indicated that participants with a low HEI score at baseline (≤52.7), had an increase in alpha diversity in the AVO group vs. HAB group. The AVO group had a significant change in beta diversity at week 26 compared to the HAB group. At the species level, the AVO group had significantly increased Faecalibacterium prausnitzii and Bacterium AF16_15 at week 26 compared to the HAB group. Functional analysis showed no significant difference in metabolic pathways between the HAB and AVO groups. Conclusions: Our findings document a potentially favorable effect of avocados on gut microbiota diversity. The prebiotic potential of avocados is more pronounced in individuals with a low diet quality score. This trial is registered at clinicaltrials.gov as NCT03528031 (https://clinicaltrials.gov/study/NCT03528031).}, }
@article {pmid39640900, year = {2024}, author = {Pahirah, N and Narkwichean, A and Taweechotipatr, M and Wannaiampikul, S and Duang-Udom, C and Laosooksathit, W}, title = {Comparison of Gut Microbiomes Between Neonates Born by Cesarean Section and Vaginal Delivery: Prospective Observational Study.}, journal = {BioMed research international}, volume = {2024}, number = {}, pages = {8302361}, pmid = {39640900}, issn = {2314-6141}, mesh = {Humans ; *Cesarean Section ; *Gastrointestinal Microbiome ; Infant, Newborn ; Female ; Prospective Studies ; *Delivery, Obstetric ; Pregnancy ; *RNA, Ribosomal, 16S/genetics ; Male ; Feces/microbiology ; Thailand ; Bifidobacterium ; }, abstract = {Background: Balanced diversity and abundance of gut microbiome play important roles in human health, including neonatal health. Though not established, there is evidence that the delivery route could alter the diversity of neonatal gut microbiomes. Objective: The objective of the study was to investigate the differences in the gut microbiomes of neonates delivered via cesarean section compared to those born by vaginal delivery and to identify the predominant microbial taxa present in each group. Study Design: A prospective observational study of 281 healthy neonates born between February 2021 and April 2023 at Her Royal Highness Maha Chakri Sirindhorn Medical Center, Srinakharinwirot University, Thailand, was performed. The study population was divided into two groups: 139 neonates born via vaginal delivery and 141 neonates born via cesarean section. The microbiota composition of each neonate's fecal sample was identified by using 16S ribosomal ribonucleic acid metagenomic sequencing. Results: Neonates delivered vaginally exhibited a gut microbiome with higher abundance and diversity than those delivered by cesarean delivery. Bifidobacterium was the dominant genus in both groups. Bifidobacterium breve was the dominant species and was significantly higher in cesarean-delivered neonates compared to those delivered vaginally (24.0% and 9.2%, respectively) (p < 0.001). However, the taxonomy of only 89 (64.0%) and 44 (31.43%) fecal samples could be identified from the vaginal and cesarean delivery groups, respectively. Conclusion: Route of delivery is associated with neonatal gut microbiome abundance and diversity. Neonates delivered via vaginal delivery exhibited higher diversity but lower abundance of the dominant species in the gut microbiome. Trial Registration: Thai Clinical Trials Registry identifier: TCTR20221024003.}, }
@article {pmid39639495, year = {2024}, author = {Alanzi, AR}, title = {Exploring Microbial Dark Matter for the Discovery of Novel Natural Products: Characteristics, Abundance Challenges and Methods.}, journal = {Journal of microbiology and biotechnology}, volume = {35}, number = {}, pages = {e2407064}, pmid = {39639495}, issn = {1738-8872}, mesh = {*Biological Products/isolation &amp; purification/metabolism/chemistry ; Metagenomics/methods ; *Bacteria/genetics/metabolism/classification ; *Microbiota ; Phylogeny ; Biotechnology ; }, abstract = {The objective of this review is to investigate microbial dark matter (MDM) with a focus on its potential for discovering novel natural products (NPs). This first part will examine the characteristics and abundance of these previously unexplored microbial communities, as well as the challenges faced in identifying and harnessing their unique biochemical properties and novel methods in this field. MDMs are thought to hold great potential for the discovery of novel NPs, which could have significant applications in medicine, agriculture, and industry. In recent years, there has been a growing interest in exploring MDM to unlock its potential. In fact, developments in genome-sequencing technologies and sophisticated phylogenetic procedures and metagenomic techniques have contributed to drastically make important changes in our sights on the diversity of microbial life, including the very outline of the tree of life. This has led to the development of novel technologies and methodologies for studying these elusive microorganisms, such as single-cell genomics, metagenomics, and culturomics. These approaches enable researchers to isolate and analyze individual microbial cells, as well as entire communities, providing insights into their genetic and metabolic potential. By delving into the MDM, scientists hope to uncover new compounds and biotechnological advancements that could have far-reaching impacts on various fields.}, }
@article {pmid39639355, year = {2024}, author = {Benga, L and Rehm, A and Gougoula, C and Westhoff, P and Wachtmeister, T and Benten, WPM and Engelhardt, E and Weber, APM and Köhrer, K and Sager, M and Janssen, S}, title = {The host genotype actively shapes its microbiome across generations in laboratory mice.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {256}, pmid = {39639355}, issn = {2049-2618}, mesh = {Animals ; Mice ; Female ; *Genotype ; *Mice, Inbred BALB C ; *Mice, Inbred C57BL ; *Microbiota ; Male ; Maternal Inheritance ; Embryo, Mammalian/microbiology ; Host Microbial Interactions ; Pregnancy ; }, abstract = {BACKGROUND: The microbiome greatly affects health and wellbeing. Evolutionarily, it is doubtful that a host would rely on chance alone to pass on microbial colonization to its offspring. However, the literature currently offers only limited evidence regarding two alternative hypotheses: active microbial shaping by host genetic factors or transmission of a microbial maternal legacy.<br><br>RESULTS: To further dissect the influence of host genetics and maternal inheritance, we collected two-cell stage embryos from two representative wild types, C57BL6/J and BALB/c, and transferred a mixture of both genotype embryos into hybrid recipient mice to be inoculated by an identical microbiome at birth.<br><br>CONCLUSIONS: Observing the offspring for six generations unequivocally emphasizes the impact of host genetic factors over maternal legacy in constant environments, akin to murine laboratory experiments. Interestingly, maternal legacy solely controlled the microbiome in the first offspring generation. However, current evidence supporting maternal legacy has not extended beyond this initial generation, resolving the aforementioned debate. Video Abstract.}, }
@article {pmid39639104, year = {2025}, author = {Knuth, MM and Campos, CV and Smith, K and Hutchins, EK and Lewis, S and York, M and Coghill, LM and Franklin, C and MacFarlane, AJ and Ericsson, AC and Magnuson, T and Ideraabdullah, F}, title = {Timing of standard chow exposure determines the variability of mouse phenotypic outcomes and gut microbiota profile.}, journal = {Lab animal}, volume = {54}, number = {1}, pages = {24-36}, pmid = {39639104}, issn = {1548-4475}, support = {P30 ES010126/ES/NIEHS NIH HHS/United States ; R21 DK122242/DK/NIDDK NIH HHS/United States ; R25 GM089569/GM/NIGMS NIH HHS/United States ; P30 DK056350/DK/NIDDK NIH HHS/United States ; T32 CA217824/CA/NCI NIH HHS/United States ; U42 OD010924/OD/NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Mice, Inbred C57BL ; Male ; Mice ; Female ; *Diet/veterinary ; Phenotype ; Time Factors ; Animal Feed/analysis ; }, abstract = {Standard chow diets influence reproducibility in animal model experiments because chows have different nutrient compositions, which can independently influence phenotypes. However, there is little evidence of the role of timing in the extent of variability caused by chow exposure. Here we measured the impact of different diets (5V5M, 5V0G, 2920X and 5058) and timing of exposure (adult exposure (AE), lifetime exposure (LE) and developmental exposure (DE)) on growth and development, metabolic health indicators and gut bacterial microbiota profiles across genetically identical C57BL/6J mice. Diet drove differences in macro- and micronutrient intake for all exposure models. AE had no effect on phenotypic outcomes. However, LE mice exhibited significant sex-dependent diet effects on growth, body weight and body composition. LE effects were mostly absent in the DE model, where mice were exposed to chow differences only from conception to weaning. Both AE and LE models exhibited similar diet-driven beta diversity profiles for the gut bacterial microbiota, with 5058 diet driving the most distinct profile. However, compared with AE, LE effects on beta diversity were sex dependent, and LE mice exhibited nine times more differentially abundant bacterial genera, the majority of which were inversely affected by 2920X and 5058 diets. Our findings demonstrate that LE to different chow diets has the greatest impact on the reproducibility of several experimental measures commonly used in preclinical mouse model studies. Importantly, weaning mice from different diets onto the same diet for maturation may be an effective way to reduce unwanted phenotypic variability among experimental models.}, }
@article {pmid39637857, year = {2024}, author = {Vaher, K and Cabez, MB and Parga, PL and Binkowska, J and van Beveren, GJ and Odendaal, ML and Sullivan, G and Stoye, DQ and Corrigan, A and Quigley, AJ and Thrippleton, MJ and Bastin, ME and Bogaert, D and Boardman, JP}, title = {The neonatal gut microbiota: A role in the encephalopathy of prematurity.}, journal = {Cell reports. Medicine}, volume = {5}, number = {12}, pages = {101845}, pmid = {39637857}, issn = {2666-3791}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Infant, Newborn ; Female ; Male ; *Infant, Premature ; Feces/microbiology ; Brain/pathology/microbiology ; Brain Diseases/microbiology/pathology ; Gestational Age ; Magnetic Resonance Imaging/methods ; Premature Birth/microbiology ; }, abstract = {Preterm birth correlates with brain dysmaturation and neurocognitive impairment. The gut microbiome associates with behavioral outcomes in typical development, but its relationship with neurodevelopment in preterm infants is unknown. We characterize fecal microbiome in a cohort of 147 neonates enriched for very preterm birth using 16S-based and shotgun metagenomic sequencing. Delivery mode strongly correlates with the preterm microbiome shortly after birth. Low birth gestational age, infant sex assigned at birth, and antibiotics associate with microbiome composition at neonatal intensive care unit discharge. We integrate these data with term-equivalent structural and diffusion brain MRI. Bacterial community composition associates with MRI features of encephalopathy of prematurity. Particularly, abundances of Escherichia coli and Klebsiella spp. correlate with microstructural parameters in deep and cortical gray matter. Metagenome functional capacity analyses suggest that these bacteria may interact with brain microstructure via tryptophan and propionate metabolism. This study indicates that the gut microbiome associates with brain development following preterm birth.}, }
@article {pmid39637856, year = {2025}, author = {Caty, SN and Alvarez-Buylla, A and Vasek, C and Tapia, EE and Martin, NA and McLaughlin, T and Golde, CL and Weber, PK and Mayali, X and Coloma, LA and Morris, MM and O'Connell, LA}, title = {Alkaloids are associated with increased microbial diversity and metabolic function in poison frogs.}, journal = {Current biology : CB}, volume = {35}, number = {1}, pages = {187-197.e8}, doi = {10.1016/j.cub.2024.10.069}, pmid = {39637856}, issn = {1879-0445}, mesh = {Animals ; *Alkaloids/metabolism ; *Microbiota ; *Anura/microbiology/metabolism ; Skin/microbiology/metabolism ; Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Poison Frogs ; }, abstract = {Shifts in host-associated microbiomes can impact both host and microbes.[1][,][2][,][3][,][4][,][5][,][6] It is of interest to understand how perturbations, like the introduction of exogenous chemicals,[7][,][8][,][9][,][10][,][11][,][12][,][13] impact microbiomes. In poison frogs (family Dendrobatidae), the skin microbiome is exposed to alkaloids that the frogs sequester for defense.[14][,][15][,][16][,][17][,][18][,][19] These alkaloids are antimicrobial[20][,][21][,][22]; however, their effect on the frogs' skin microbiome is unknown. To test this, we characterized microbial communities from field-collected dendrobatid frogs. Then, we conducted a laboratory experiment to monitor the effect of the alkaloid decahydroquinoline (DHQ) on the microbiome of two frog species with contrasting alkaloid loads in nature. In both datasets, we found that alkaloid-exposed microbiomes were more phylogenetically diverse, with an increase in diversity among rare taxa. To better understand the isolate-specific response to alkaloids, we cultured microbial isolates from poison frog skin and found that many isolates exhibited enhanced growth or were not impacted by the addition of DHQ. To further explore the microbial response to alkaloids, we sequenced the metagenomes from high- and low-alkaloid frogs and observed a greater diversity of genes associated with nitrogen and carbon metabolism in high-alkaloid frogs. From these data, we hypothesized that some strains may metabolize the alkaloids. We used stable isotope tracing coupled to nanoSIMS (nanoscale secondary ion mass spectrometry), which supported the idea that some of these isolates are able to metabolize DHQ. Together, these data suggest that poison frog alkaloids open new niches for skin-associated microbes with specific adaptations, such as alkaloid metabolism, that enable survival in this environment.}, }
@article {pmid39636804, year = {2024}, author = {Calderon, MS and Bustamante, DE and Perez, J and Fernandez-Güimac, SLJ and Mendoza, JE and Barboza, JI and Ayala, RY and Carrion, JV}, title = {Diversity and functional role of bacterial microbiota in spontaneous coffee fermentation in northern Peru using shotgun metagenomics.}, journal = {Journal of food science}, volume = {89}, number = {12}, pages = {9692-9710}, doi = {10.1111/1750-3841.17583}, pmid = {39636804}, issn = {1750-3841}, support = {//Consejo Nacional de Ciencia, Tecnolog&#xed;a e Innovaci&#xf3;n Tecnol&#xf3;gica/ ; N&#xb0; 030-2018-FONDECYT-BM-IADT-MU//Peruvian CONCYTEC under the projects Metacaf&#xe9;/ ; N&#xb0; PE501081184-2022-PROCIENCIA//Metacaf&#xe9; 2.0/ ; //Vicerrectorado de Investigaci&#xf3;n (VRIN) de la UNTRM/ ; }, mesh = {*Fermentation ; Peru ; *Coffee/microbiology ; *Metagenomics/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; *Microbiota ; Taste ; Coffea/microbiology ; Food Microbiology/methods ; }, abstract = {Peru is the ninth-largest coffee producer and the largest organic coffee exporter worldwide. Specific modifications in the microbial consortia during fermentation control the flavor of coffee. It is still unclear how fermentation duration affects microbial communities. This study aimed to provide insights into the diversity and functional behavior of the bacterial microbiome during coffee fermentation in northern Peru using shotgun metagenomics. Accordingly, metagenomic DNA was extracted and sequenced from samples of the liquid fraction during the short fermentation process (SFP) in Amazonas (6 and 12 h) and long fermentation process (LFP) in Cajamarca (6, 12, 18, 24, and 36 h). Our findings indicate that common (e.g., Acetobacter, Lactobacillus, Leuconostoc, and Weissella) and unique (e.g., Acidiphilium and Methylobacterium) acid-tolerant bacteria from the SFP and LFP play crucial roles and have a positive impact on the sensory qualities of coffee. Specifically, the LFP from San Ignacio might be associated with the high sensory quality of coffee based on the release of catalytic, hydrolase, oxidoreductase, transferase, and transporter enzymes in the InterPro and KEGG profiles. Additionally, these bacterial microorganisms metabolize several compounds (e.g., isoleucine, betaine, galactose, tryptophan, arginine, and cobalamin) into volatile compounds, mainly in the LFP, enhancing the flavor and aroma of coffees. This characteristic suggests that the LFP has a stronger effect on coffee quality than does the SFP on the basis of bacterial diversity and functional prediction. These findings provide new perspectives on the potential biotechnological uses of autochthonous microorganisms to produce superior-quality coffee beans from northern Peru.}, }
@article {pmid39635985, year = {2025}, author = {Mulders, MCF and Van Koetsveld, PM and Feelders, RA and Hofland, LJ and de Herder, WW and Kraaij, R and Hofland, J}, title = {Gut microbial and functional alterations lead to metagenomic signatures for midgut neuroendocrine tumor patients and for carcinoid syndrome.}, journal = {Endocrine-related cancer}, volume = {32}, number = {2}, pages = {}, doi = {10.1530/ERC-24-0145}, pmid = {39635985}, issn = {1479-6821}, mesh = {Aged ; Female ; Humans ; Male ; Middle Aged ; Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; *Intestinal Neoplasms/diagnosis/genetics/microbiology/pathology ; *Malignant Carcinoid Syndrome/diagnosis/genetics/microbiology/pathology ; Metagenome ; Metagenomics/methods ; *Neuroendocrine Tumors/diagnosis/genetics/microbiology/pathology ; Prospective Studies ; }, abstract = {Midgut neuroendocrine tumors (NET) derive from enterochromaffin cells, which have a close interrelationship with intestinal microbiota. Recently, we have utilized 16S rRNA sequencing to uncover that midgut NET patients have a depleted gut microbiome and a specific fecal microbial signature. This study aims to validate these findings and to further characterize the role of microbes and microbial metabolic pathways in midgut NET patients with and without carcinoid syndrome (CS). Fecal samples from 60 midgut NET patients and 20 household-matched controls were subjected to whole metagenome sequencing. The gut microbial community composition of midgut NET patients differed from that of controls, with 2 genera, 17 species and 9 microbial pathways showing differential abundance (P < 0.001). No differences in the microbial composition were observed between midgut NET patients with and without CS (P > 0.05). However, we did observe changes in inter-genus correlations of Bacteroides, Odoribacter, Parasutterella, Klebsiella, Ruminococcus and Proteobacteria when comparing these two patient groups. A signature of 16 microbial species (area under the receiver operating characteristics (AUROC) curve 0.892) or 18 microbial pathways (AUROC 0.909) accurately predicted the presence of a midgut NET. Furthermore, a microbial signature consisting of 14 functional microbial pathways distinguished CS patients from non-CS patients (AUROC 0.807). Thus, this study confirms that the gut microbiome of midgut NET patients is altered at the metagenomic level, which is not related to the presence of CS. A fecal microbial signature could constitute a novel biomarker for the diagnosis of midgut NET or CS.}, }
@article {pmid39635041, year = {2024}, author = {Dora, D and Revisnyei, P and Mihucz, A and Kiraly, P and Szklenarik, G and Dulka, E and Galffy, G and Lohinai, Z}, title = {Metabolic pathways from the gut metatranscriptome are associated with COPD and respiratory function in lung cancer patients.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1381170}, pmid = {39635041}, issn = {2235-2988}, mesh = {Humans ; *Pulmonary Disease, Chronic Obstructive/microbiology/metabolism/physiopathology ; *Gastrointestinal Microbiome/genetics ; *Metabolic Networks and Pathways/genetics ; *Lung Neoplasms/microbiology/genetics ; Male ; *Feces/microbiology ; Female ; Aged ; Middle Aged ; Carcinoma, Non-Small-Cell Lung/genetics/microbiology ; Transcriptome ; Metagenomics/methods ; Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Streptococcus/genetics/isolation &amp; purification/metabolism ; }, abstract = {INTRODUCTION: Changes in the human gut microbiome have been linked to various chronic diseases, including chronic obstructive pulmonary disease (COPD). While substantial knowledge is available on the genomic features of fecal communities, little is known about the microbiome's transcriptional activity. Here, we analyzed the metatranscriptomic (MTR) abundance of MetaCyc pathways, SuperPathways, and protein domain families (PFAM) represented by the gut microbiome in a cohort of non-small cell lung cancer (NSCLC) patients with- or without COPD comorbidity.<br><br>METHODS: Fecal samples of 40 NSCLC patients with- or without COPD comorbidity were collected at the time of diagnosis. Data was preprocessed using the Metaphlan3/Humann3 pipeline and BioCyc[&#xa9;] to identify metabolic SuperPathways. LEfSe analysis was conducted on Pathway- and PFAM abundance data to determine COPD- and non-COPD-related clusters.<br><br>RESULTS: Key genera Streptococcus, Escherichia, Gemella, and Lactobacillus were significantly more active transcriptionally compared to their metagenomic presence. LEfSe analysis identified 11 MetaCyc pathways that were significantly overrepresented in patients with- and without COPD comorbidity. According to Spearman's rank correlation, Smoking PY showed a significant negative correlation with Glycolysis IV, Purine Ribonucleoside Degradation and Glycogen Biosynthesis I, and a significant positive correlation with Superpathway of Ac-CoA Biosynthesis and Glyoxylate cycle, whereas forced expiratory volume in the first second (FEV1) showed a significant negative correlation with Glycolysis IV and a significant positive correlation with Glycogen Biosynthesis I. Furthermore, COPD patients showed a significantly increased MTR abundance in ~60% of SuperPathways, indicating a universally increased MTR activity in this condition. FEV1 showed a significant correlation with SuperPathways Carbohydrate degradation, Glycan biosynthesis, and Glycolysis. Taxonomic analysis suggested a more prominent MTR activity from multiple Streptococcus species, Enterococcus (E.) faecalis, E. faecium and Escherichia (E.) coli than expected from their metagenomic abundance. Multiple protein domain families (PFAMs) were identified as more associated with COPD, E. faecium, E.coli, and Streptococcus salivarius, contributing the most to these PFAMs.<br><br>CONCLUSION: Metatranscriptome analysis identified COPD-related subsets of lung cancer with potential therapeutic relevance.}, }
@article {pmid39632378, year = {2024}, author = {Li, Y and Hu, W and Lin, B and Ma, T and Zhang, Z and Hu, W and Zhou, R and Kwok, LY and Sun, Z and Zhu, C and Zhang, H}, title = {Omic characterizing and targeting gut dysbiosis in children with autism spectrum disorder: symptom alleviation through combined probiotic and medium-carbohydrate diet intervention - a pilot study.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2434675}, pmid = {39632378}, issn = {1949-0984}, mesh = {Humans ; *Autism Spectrum Disorder/diet therapy/microbiology ; Pilot Projects ; *Probiotics/administration &amp; dosage ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology/diet therapy/therapy ; Male ; Child ; Female ; *Feces/microbiology/chemistry ; Child, Preschool ; Bacteria/classification/isolation &amp; purification/genetics/metabolism ; Dietary Carbohydrates/metabolism/administration &amp; dosage ; Bifidobacterium animalis ; }, abstract = {Autism spectrum disorder (ASD) currently lacks effective diagnostic and therapeutic approaches. Disruptions in the gut ecosystem have been observed in individuals with ASD, suggesting that targeting gut microbiota through probiotic and dietary supplementation may serve as a potential treatment strategy. This two-phase study aimed to characterize the fecal metagenome of children with ASD and investigate the beneficial effects of a combined probiotic and medium-carbohydrate intervention in ASD. Fecal metagenomes of children with ASD were compared to those of typically developing children, revealing intestinal dysbiosis in ASD, characterized by reduced levels of Prevotella sp. Dialister invisus, and Bacteroides sp. along with increased predicted abundances of inosine, glutamate, xanthine, and methylxanthine. The gut bacteriome and phageome exhibited high cooperativity. In a 3-month pilot study, Bifidobacterium animalis subsp. lactis Probio-M8 (Probio-M8) was administered alongside a medium-carbohydrate diet to Chinese children with ASD. The primary endpoint was the Childhood Autism Rating Scale (CARS), while the secondary endpoint was the Gastrointestinal Symptom Rating Scale (GSRS). A total of 72 autistic children were initially recruited for the intervention study, but only 53 completed the intervention. Probio-M8, in combination with dietary intervention, significantly improved CARS and GSRS scores, increased fecal levels of Bifidobacterium animalis, Akkermansia muciniphila, Fusicatenibacter saccharivorans, and Sutterella sp. while also reducing Blautia obeum (Benjamini-Hochberg corrected p ≤ 0.05 for all cases). The intervention also modulated fecal metabolites associated with the metabolism of amino acids (lysine), neurotransmitters (glutamate, γ-aminobutyric acid), polyunsaturated fatty acids (arachidonate, myristic acid), and vitamin B3. In conclusion, Probio-M8 combined with medium-carbohydrate diet effectively improved ASD symptoms, with associated changes in the gut microbiome and metabolome, supporting its potential as an adjunctive therapy for ASD.}, }
@article {pmid39631543, year = {2025}, author = {Qu, M and Zheng, Y and Cheng, Z and Shi, Y and Wang, W and Wu, X and Chen, J}, title = {Mechanism of chlorobenzene removal in biotrickling filter enhanced by non-thermal plasma: Insights from biodiversity and functional gene perspectives.}, journal = {Bioresource technology}, volume = {418}, number = {}, pages = {131931}, doi = {10.1016/j.biortech.2024.131931}, pmid = {39631543}, issn = {1873-2976}, mesh = {*Chlorobenzenes/isolation &amp; purification/metabolism ; *Filtration/methods/instrumentation ; Biodegradation, Environmental ; *Biodiversity ; *Plasma Gases/chemistry ; Bacteria/genetics/metabolism ; Volatile Organic Compounds ; Bioreactors/microbiology ; Carbon Dioxide ; }, abstract = {Biotrickling filter (BTF) technology is inefficient in the treatment of Cl-containing volatile organic compounds (VOCs) such as chlorobenzene (CB). This study adopted non-thermal plasma (NTP) as a pretreatment and conducted in-depth analyses, especially in microorganisms, to investigate strengthening mechanism of a NTP to a BTF in the process. The introduction of NTP enhance efficiency of CB removal from 65 % to 90 %, and CO2 generation from 60 % to 85 %. It is found that the protein content of the extracellular polymeric substances increases from 212 × 10[-3] mg·g[-1] filler to 299 × 10[-3] mg·g[-1] filler, thus CB capturing and utilization enhanced. Metagenomic analysis showed that bacteria with CB-degrading properties were enriched in BTF, and CB was involved in cellular metabolism as a carbon source. The presence of active substances from NTP is found to stimulate the ability of BTF treatment. The findings of this study will provide theoretical support for the application of NTP-BTF technology.}, }
@article {pmid39630952, year = {2024}, author = {Gao, F and Shen, Y and Wu, H and Laue, HE and Lau, FK and Gillet, V and Lai, Y and Shrubsole, MJ and Prada, D and Zhang, W and Liu, Z and Bellenger, JP and Takser, L and Baccarelli, AA}, title = {Associations of Stool Metal Exposures with Childhood Gut Microbiome Multiomics Profiles in a Prospective Birth Cohort Study.}, journal = {Environmental science &amp; technology}, volume = {58}, number = {50}, pages = {22053-22063}, doi = {10.1021/acs.est.4c09642}, pmid = {39630952}, issn = {1520-5851}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Feces/microbiology ; Child ; *Metals ; Prospective Studies ; Female ; Male ; Birth Cohort ; Environmental Exposure ; Multiomics ; }, abstract = {Metal exposures are closely related to childhood developmental health. However, their effects on the childhood gut microbiome, which also impacts health, are largely unexplored using microbiome multiomics including the metagenome and metatranscriptome. This study examined the associations of fecal profiles of metal/element exposures with gut microbiome species and active functional pathways in 8- to 12-year-old children (N = 116) participating in the GESTation and Environment (GESTE) cohort study. We analyzed 19 stool metal and element concentrations (B, Na, Mg, Al, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Ba, and Pb). Covariate-adjusted linear regression models identified several significant microbiome associations with continuous stool metal/element concentrations. For instance, Zn was positively associated with Turicibacter sanguinis (coef = 1.354, q-value = 0.039) and negatively associated with Eubacterium eligens (coef = -0.794, q-value = 0.044). Higher concentrations of Cd were associated with lower Eubacterium eligens (coef = -0.774, q-value = 0.045). Additionally, a total of 490 significant functional pathways such as biosynthesis and degradation/utilization/assimilation were identified, corresponding to different functions, including amino acid synthesis and carbohydrate degradation. Our results suggest links among metal exposures, pediatric gut microbiome multiomics, and potential health implications. Future work will further explore their relation to childhood health.}, }
@article {pmid39629792, year = {2024}, author = {González-García, S and Hamdan-Partida, A and Pérez-Ramos, J and Aguirre-Garrido, JF and Bustos-Hamdan, A and Bustos-Martínez, J}, title = {Comparison of the bacterial microbiome in the pharynx and nasal cavity of persistent, intermittent carriers and non-carriers of Staphylococcus aureus.}, journal = {Journal of medical microbiology}, volume = {73}, number = {12}, pages = {}, pmid = {39629792}, issn = {1473-5644}, mesh = {Humans ; *Pharynx/microbiology ; *Staphylococcus aureus/isolation &amp; purification/genetics ; *Carrier State/microbiology ; *Nasal Cavity/microbiology ; *Microbiota ; *Staphylococcal Infections/microbiology ; Male ; Female ; Adult ; Young Adult ; RNA, Ribosomal, 16S/genetics ; DNA, Bacterial/genetics ; }, abstract = {Introduction. Staphylococcus aureus is a bacterium that colonizes various human sites. The pharynx has been considered as a site of little clinical relevance and little studied. Recently, it has been reported that S. aureus can colonize more the pharynx than the nose. In addition, S. aureus can persist in these sites for prolonged periods of time.Hypothesis. The composition of the pharyngeal and nasal microbiome will differ between persistent, intermittent carriers and non-carriers of S. aureus.Aim. Determine whether the pharyngeal and nasal microbiome is different between carriers and non-carriers of S. aureus.Methodology. S. aureus carriers were monitored by means of pharyngeal and nasal exudates of apparently healthy adult university students for 3 months. Samples from individuals of the same carrier type were pooled, and DNA was extracted and the 16S rRNA was sequenced. The sequences were analysed in MOTHUR v.1.48.0 software, by analysing the percentages of relative abundance in the STAMP 2.1.3 program, in addition to the predictive analysis of metabolic pathways in PICRUSt2.Results. A greater colonization of S. aureus was found in the pharynx than in the nose. The microbiomes of S. aureus carriers and non-carriers do not show significant differences. The main microbiome difference found was between pharyngeal and nasal microbiomes. No significant differences were found in the abundance of the genus Staphylococcus in pharyngeal and nasal S. aureus carriers and non-carriers. The nasal microbiome was found to have more variation compared to the pharyngeal microbiome, which appears to be more stable between individuals and pools. Predictive analysis of metabolic pathways showed a greater presence of Staphylococcus-associated pathways in the nose than in the pharynx.Conclusion. S. aureus can colonize and persist in the pharynx in equal or greater proportion than in the nose. No statistically significant differences were found in the microbiome of the pharyngeal and nasal carriers and non-carriers of S. aureus, but the pharyngeal and nasal microbiomes are different independent of the type of S. aureus carrier or non-carrier. Therefore, the microbiome apparently does not influence the persistence of S. aureus.}, }
@article {pmid39629129, year = {2024}, author = {Zhao, Q and Lu, Y and Duan, J and Du, D and Pu, Q and Li, F}, title = {Gut microbiota depletion and FXR inhibition exacerbates zonal hepatotoxicity of sunitinib.}, journal = {Theranostics}, volume = {14}, number = {18}, pages = {7219-7240}, pmid = {39629129}, issn = {1838-7640}, mesh = {Animals ; *Sunitinib/toxicity ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Chemical and Drug Induced Liver Injury/pathology/etiology ; *Liver/drug effects/pathology ; *Mice, Knockout ; *Receptors, Cytoplasmic and Nuclear/metabolism ; Male ; Hepatocytes/drug effects ; Mice, Inbred C57BL ; Endothelial Cells/drug effects ; Apoptosis/drug effects ; Bacteroidetes/drug effects ; Autophagy/drug effects ; }, abstract = {Rationale: Sunitinib is a small-molecule tyrosine kinase inhibitor associated with the side-effect of liver injury. The impaired cell type in liver and the hepatotoxicity mechanisms is still unclear. Methods: Spatial metabolomics, transmission electron microscopy, immunofluorescence co-staining, and isolation of bile duct cells and liver sinusoidal endothelial cells (LSECs) were used to evaluate the zonated hepatotoxicity of sunitinib. Farnesoid X receptor (FXR) conditional knockout mice, metagenomics analysis, bacteria clearance, bacterial culture, Parabacteroides distasonis and 3-oxolithocholic acid supplementation were used to evaluate the hepatotoxicity mechanisms of sunitinib. Results: Phenotype analysis found that hepatic autophagy, apoptosis, and mitochondrial injury were observed in vivo or in vitro after sunitinib treatment. By using spatial metabolomics and isolation of bile duct cells and LSECs, the zonated drug toxicity was observed around the portal vein. Hepatocytes, bile duct cells, and LSECs were damaged after sunitinib treatment. FXR inhibition and gut microbiota depletion aggravated sunitinib-induced liver injury. For diurnal variation, sunitinib-induced liver injury was enhanced at night compared with that at day, and FXR and gut microbiota participated in circadian rhythmic hepatotoxicity induced by sunitinib. Conclusions: Our data suggested activation of FXR and Parabacteroides distasonis supplementation may be used to improve sunitinib-induced hepatotoxicity.}, }
@article {pmid39628383, year = {2025}, author = {Wang, H and Feng, L and Pei, Z and Zhao, J and Lu, S and Lu, W}, title = {Gut microbiota metabolism of branched-chain amino acids and their metabolites can improve the physiological function of aging mice.}, journal = {Aging cell}, volume = {24}, number = {4}, pages = {e14434}, pmid = {39628383}, issn = {1474-9726}, support = {2022YFF1100403//National Key Research and Development Program of China/ ; HB2023003//Top Talent Support Program for young and middle-aged people of Wuxi Health Committee/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Amino Acids, Branched-Chain/metabolism ; Mice ; *Aging/metabolism/drug effects ; Mice, Inbred C57BL ; Male ; }, abstract = {The metabolism of branched-chain amino acids by gut microbiota can improve overall health and may reverse aging. In this study, we investigated Parabacteroides merdae, a gut microbe that is known to catabolise branched-chain amino acids (BCAAs). Three metabolites of BCAAs isovalerate, 2-methylbutyrate, and isobutyrate were used to treat D-gal induced aging mice. The results showed that these treatments could delay aging in mice by providing health benefits in reducing oxidative stress and inflammation, improving muscle capacity, reversing brain acetylcholine levels, and regulating blood glucose. The mechanism was preliminarily explored by combining the gut microbiota metagenome and faecal serum metabolome. Parabacteroides merdae altered the species composition and structure of the gut microbiota in mice. Increasing the abundance of beneficial bacteria, such as Bifidobacterium pseudolongum. Three metabolites affects the gut microbiota and the body's pathways of protein and improves the overall health through a variety of signaling pathways. Overall, regulating the gut microbiota involved in branched-chain amino acid metabolism to bring health benefits may be a new way of reversing aging.}, }
@article {pmid39628196, year = {2024}, author = {Li, ZX and Li, JH and Zhang, Q and Lu, JJ and Gao, CH and Jin, DS and Xu, MG}, title = {[Response and Assembly Process of Soil Microbial Communities Under Different Reclamation Measures].}, journal = {Huan jing ke xue= Huanjing kexue}, volume = {45}, number = {12}, pages = {7326-7336}, doi = {10.13227/j.hjkx.202312247}, pmid = {39628196}, issn = {0250-3301}, mesh = {*Soil Microbiology ; *Fungi/classification ; *Bacteria/classification/genetics/growth &amp; development/isolation &amp; purification ; Mining ; Nitrogen ; Soil/chemistry ; Phosphorus ; Environmental Restoration and Remediation/methods ; Microbiota ; Ecosystem ; }, abstract = {Reclamation is essential for restoring the ecological function of soil in mining areas. However, the microbiological mechanism of soil ecological function reconstruction under different reclamation measures still needs to be clarified. Clarifying the characteristics of soil bacterial and fungal communities, assembly mechanisms, and their relationship with physicochemical properties under different reclamation measures is crucial for reshaping the ecological stability of soil in mining areas. Metagenomic sequencing technology was combined with the null model and neutral model to analyze the differences in soil microbial diversity, community composition, network structure, and community assembly process between the reclaimed natural recovery area （LH） and the reclamation fertilization area （MM）. The results suggested that： ① Compared with that in the LH treatment, the MM treatment significantly increased the soil nutrient content, and the total nitrogen （TN）, total phosphorus （TP）, available phosphorus （AP）, and available potassium （AK） contents increased by 34.70%, 72.72%, 468.98%, and 45.74%, respectively （P<0.05）. ② The dominant bacterial and fungal communities did not change under the LH and MM treatments； however, the abundance of bacterial communities changed significantly. Compared with that in the LH treatment, the relative abundance of Acidobacteria increased significantly by 5.4% in the MM treatment, while the relative abundance of Candidatus Rokubacteria decreased significantly by 235.72% （P<0.05）. Under different reclamation measures, the indicator microorganisms of bacterial and fungal communities changed. ③ Compared with that in the LH treatment, the MM treatment increased the complexity of bacterial networks, decreased the complexity of fungal networks, and increased the number of soil bacterial nodes and links. The reclamation measures transformed the key bacterial groups from Proteobacteria to Candidatus Rokubacteria and Planctomycetes. The key group of fungi was Ascomycota. 4.） The deterministic process dominated the assembly of bacterial and fungal communities. Homogeneous selection contributed the most to the bacterial community assembly in the LH treatment, and heterogeneous selection contributed the most to the MM treatment. The fungal communities were all dominated by heterogeneous selection. These results provide new insights into the soil microbial community structure and ecological function restoration in coal mining subsidence reclamation areas.}, }
@article {pmid39628107, year = {2025}, author = {Zou, Y and Zou, X and Lin, C and Han, C and Zou, Q}, title = {Inference of functional differentiation of intestinal microbes between two wild zokor species based on metagenomics.}, journal = {Pest management science}, volume = {81}, number = {4}, pages = {1860-1872}, doi = {10.1002/ps.8587}, pmid = {39628107}, issn = {1526-4998}, support = {//National Promoted Program of scientific and technological achievements in Forestry and Grassland/ ; //the National Key Program of Research and Development/ ; }, mesh = {*Gastrointestinal Microbiome ; Metagenomics ; Animals ; *Bacteria/genetics/isolation &amp; purification/classification/metabolism ; Cellulose/metabolism ; }, abstract = {BACKGROUND: Currently, there are fewer studies on the intestinal microbes of wild zokors, and it is unclear how zokors adapt to special underground environments by regulating their intestinal microbes. Here, we explored the function of intestinal microbes of Eospalax cansus and Eospalax rothschildi based on metagenomics.<br><br>RESULTS: Both zokor species have similar intestinal microbial composition, but E. cansus has a higher proportion of bacteria involved in carbohydrate degradation. Functional analysis based on KEGG and CAZy databases indicated that the intestinal microbes of E. cansus harboured stronger carbohydrate degradation ability, mainly in starch and sucrose metabolism, and further in cellulose degradation. Furthermore, the cellulase activity was significantly higher in E. cansus than that in E. rothschildi. Eospalax cansus has a stronger microbial fermentation ability due to an increase in fibre-degrading bacteria like unclassified_f_Lachnospiraceae, Ruminococcus, and Clostridium. In addition, the dominant bacteria isolated from zokor were Bacillus, some of which could degrade both cellulose and hemicellulose.<br><br>CONCLUSION: Metagenomic analysis and bacterial isolation experiments indicate that E. cansus has a stronger microbial cellulose-degrading capacity, possibly as an adaptation to its limited food resources underground. &#xa9; 2024 Society of Chemical Industry.}, }
@article {pmid39628067, year = {2025}, author = {Fujimoto, S and Hatano, K and Banno, E and Motooka, D and De Velasco, MA and Kura, Y and Toyoda, S and Hashimoto, M and Adomi, S and Minami, T and Yoshimura, K and Oka, T and Hata, J and Matsushita, M and Takao, T and Takada, S and Tsujimura, A and Kojima, Y and Obara, W and Nakamura, S and Uemura, H and Nonomura, N and Fujita, K}, title = {Comparative analysis of gut microbiota in hormone-sensitive and castration-resistant prostate cancer in Japanese men.}, journal = {Cancer science}, volume = {116}, number = {2}, pages = {462-469}, pmid = {39628067}, issn = {1349-7006}, support = {//Yakult Bio-Science Foundation/ ; //The Japanese Foundation for Prostate Research (JFPR)/ ; //The Japanese Urological Association/ ; }, mesh = {Male ; *Gastrointestinal Microbiome/genetics ; *Prostatic Neoplasms, Castration-Resistant/microbiology/pathology ; Animals ; Humans ; Mice ; Aged ; Japan ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Mice, Knockout ; PTEN Phosphohydrolase/genetics ; Prostatic Neoplasms/microbiology ; Disease Models, Animal ; Disease Progression ; Mice, Transgenic ; East Asian People ; }, abstract = {Gut microbiota plays a crucial role in the development and progression of prostate cancer, with previous studies indicating that certain bacterial taxa are more abundant in castration-resistant prostate cancer (CRPC) compared to hormone-sensitive prostate cancer (HSPC). Notably, the composition of gut microbiota can vary significantly by geographic region, and Japanese individuals have a distinct microbial profile. However, research exploring these differences within Japanese populations remains limited. This study investigated the gut microbiota differences between Japanese men with HSPC and CRPC and further validated these findings using a transgenic mouse model. Rectal swab samples were collected from 140 Japanese men diagnosed with HSPC (n = 84) or CRPC (n = 56) between September 2020 and July 2022. Gut microbiota composition was analyzed using 16S rRNA gene sequencing. Additionally, Pten-KO mice, which model the progression from HSPC to CRPC, underwent similar microbiota analysis. Results revealed significant differences in gut microbiota composition between HSPC and CRPC patients. Specifically, the CRPC group showed a higher abundance of Firmicutes, including Gemella and Lactobacillus, compared to the HSPC group. These differences were mirrored in the mouse model, where CRPC mice also showed an increase in these bacteria. This study identifies distinct microbial differences between HSPC and CRPC in Japanese men, suggesting that Gemella and Lactobacillus may be associated with the progression to castration resistance in prostate cancer. These findings suggest that gut microbiota differences may be associated with prostate cancer progression. Further research is needed to explore the potential of targeting the microbiota as a therapeutic strategy.}, }
@article {pmid39626557, year = {2025}, author = {Peng, Q and Cheng, S and Huang, X and Pu, Y and Xie, G}, title = {Comprehensive multi-omics analysis of fermented Chinese artichoke: Insights from Flavoromics, metagenomics, and untargeted metabolomics.}, journal = {Food chemistry}, volume = {467}, number = {}, pages = {142278}, doi = {10.1016/j.foodchem.2024.142278}, pmid = {39626557}, issn = {1873-7072}, mesh = {*Bacteria/metabolism/genetics/classification/isolation &amp; purification ; *Cynara scolymus/chemistry/metabolism ; *Fermentation ; Fermented Foods/analysis/microbiology ; *Flavoring Agents/metabolism/chemistry ; *Metabolomics ; *Metagenomics ; Microbiota ; Multiomics ; *Taste ; *Volatile Organic Compounds/metabolism/chemistry/analysis ; }, abstract = {Fermented Chinese Artichoke, a traditional Chinese fermented vegetable, has a distinctive flavor profile shaped by its fermentation process. This study applied flavoromics, metagenomics, and untargeted metabolomics to comprehensively analyze flavor compounds, microbial communities, and metabolic transformations during fermentation. We identified 43 volatile organic compounds (VOCs), with Terpineol, 1-Hexanol, and Linalool as the predominant components. Metagenomic analysis highlighted Lactiplantibacillus plantarum, Priestia megaterium, and Pediococcus pentosaceus as the dominant species, while Lactiplantibacillus, Pediococcus, and Bacillus were key in flavor development. Untargeted metabolomics further revealed increases in organic acids, amino acids, and umami compounds, contributing to flavor enhancement. These findings offer valuable insights into flavor formation mechanisms in Fermented Chinese Artichoke and provide guidance for improving its industrial fermentation quality.}, }
@article {pmid39626551, year = {2025}, author = {Xu, C and Han, A and Tian, Y and Sun, S}, title = {Based on computer simulation and experimental verification: mining and characterizing novel antimicrobial peptides from soil microbiome.}, journal = {Food chemistry}, volume = {467}, number = {}, pages = {142275}, doi = {10.1016/j.foodchem.2024.142275}, pmid = {39626551}, issn = {1873-7072}, mesh = {*Soil Microbiology ; *Antimicrobial Peptides/chemistry/pharmacology ; Microbiota ; Anti-Bacterial Agents/pharmacology/chemistry ; Computer Simulation ; Microbial Sensitivity Tests ; Klebsiella pneumoniae/drug effects ; Staphylococcus aureus/drug effects/growth &amp; development ; Molecular Docking Simulation ; Escherichia coli/drug effects/genetics ; Bacteria/drug effects/genetics ; Molecular Dynamics Simulation ; }, abstract = {Antimicrobial peptides (AMPs) show great promise for enhancing food safety and extending shelf life, but traditional screening methods are complex and costly. To address these issues, we developed a deep learning-based prediction pipeline to identify potential AMPs from soil metagenomic data, achieving high accuracy (92.71 %) and precision (91.29 %). Based on model scoring, surface charge, and Hemopred and ToxinPred screenings, we identified nine candidate peptides. Peptide P4 (GTAWRWHYRARS) showed the best binding affinity to MrkH in molecular docking studies and was validated through molecular dynamics simulations. The chemically synthesized P4 demonstrated significant antimicrobial activity against Klebsiella pneumoniae, Escherichia coli, and Staphylococcus aureus, indicating its potential as an effective alternative to traditional food antimicrobial agents. This study highlights the effectiveness of our integrated prediction pipeline for discovering new AMPs.}, }
@article {pmid39626421, year = {2024}, author = {Wang, J and Wu, D and Wu, Q and Chen, J and Zhao, Y and Wang, H and Liu, F and Yuan, Q}, title = {Vertical profiles of community and activity of methanotrophs in large lake and reservoir of Southwest China.}, journal = {The Science of the total environment}, volume = {957}, number = {}, pages = {177782}, doi = {10.1016/j.scitotenv.2024.177782}, pmid = {39626421}, issn = {1879-1026}, mesh = {China ; *Lakes/microbiology/chemistry ; *Methane/metabolism/analysis ; *Geologic Sediments/microbiology/chemistry ; Methylococcaceae/genetics/metabolism ; Oxidation-Reduction ; RNA, Ribosomal, 16S ; Environmental Monitoring ; Microbiota ; }, abstract = {Microbial methane oxidation plays a significant role in regulating methane emissions from lakes and reservoirs. However, the differences in methane oxidation activity and methanotrophic community between lakes and reservoirs remain inadequately characterized. In this study, sediment and water samples were collected from the large shallow lake (Dianchi) and deep reservoirs (Dongfeng and Hongjiadu) located in karst area, Southwest China. The results indicated that the rates of aerobic oxidation of methane (AeOM) in lake sediment ranged from 7.1 to 27.7 μg g[-1] d[-1], which was higher than that in reservoirs sediment (1.92 to 11.56 μg g[-1] d[-1]). Similarly, the average AeOM in the water column of lake (104.7 μg L[-1] d[-1]) was much higher than that of reservoirs (46 μg L[-1] d[-1]). The content of sediment organic carbon and dissolved inorganic carbon were important factors that influenced the rates of AeOM in sediment and water column, respectively. 16S rRNA genes sequencing revealed a higher relative abundance of methanotrophs in lake sediments compared to reservoir sediments. The dominant methanotrophic taxa in lake was Methylococcaceae (type Ib), while Methylomonadaceae (type Ia) was predominant in reservoirs. Meanwhile, anaerobic methane-oxidizing microorganisms Candidatus Methylomirabilis and Candidatus Methanoperedens were also abundant in sediments of reservoirs. However, metatranscriptomic analysis revealed that the type I methanotrophs, especially Methylobacter, was most active in the sediment of both lake and reservoir. Water depth and conductivity could be the key controlling factors of the structures of methanotrophic communities in sediment and water column, respectively. Metagenome-assembled genomes suggested that type I methanotrophs exhibited greater motility, as evidenced by a higher number of flagellar assembly genes, while type II methanotrophs demonstrated advantages in metabolic processes such as carbon, phosphorus, and methane metabolism.}, }
@article {pmid39626398, year = {2025}, author = {Song, A and Si, Z and Xu, D and Wei, B and Wang, E and Chong, F and Fan, F}, title = {Lanthanum and cerium added to soil influence microbial carbon and nitrogen cycling genes.}, journal = {Journal of environmental management}, volume = {373}, number = {}, pages = {123509}, doi = {10.1016/j.jenvman.2024.123509}, pmid = {39626398}, issn = {1095-8630}, mesh = {*Lanthanum ; Soil/chemistry ; *Soil Microbiology ; *Cerium ; Carbon/metabolism ; Nitrogen/metabolism ; *Nitrogen Cycle ; Microbiota ; }, abstract = {The soil microbiome plays an important role in carbon (C) and nitrogen (N) processing and storage and is influenced by rare earth elements (REEs), which can have both direct and indirect effects on plant metabolic processes. Using conventional physicochemical methods and metagenomic-based analyses, we investigated REEs effects on soil respiration, soil mineral N, soil microbial community structure and functional genes related to C and N metabolism. High doses of cerium (0.16 and 0.32 mmol kg[-1] soil) increased CO2 net production rate by 59 and 42%, and N2O net production rate by 255 and 609%, respectively, compared to no REEs. Similarly, high doses of lanthanum (0.16 and 0.32 mmol kg[-1] soil) increased CO2 net production rate by 47 and 39%, and N2O net production rate by 105 and 187%, respectively. Increased soil respiration from altered relative abundances of key soil microorganisms associated with soil N cycling and organic matter degradation and functional genes encoding enzymes involved in C and N metabolism, accelerated N mineralization. Elevated REEs levels substantially increased the relative abundances of functional genes related to cellulose, chitin, glucans, hemicellulose, lignin, and peptidoglycan degradation. REEs also influenced multiple functional genes associated with the N cycle. The abundance of genes responsible for organic N degradation and synthesis, such as asnB, gdh_K15371, glsA, and gs, increased with elevated cerium and lanthanum concentrations. Similarly, the abundances of denitrification genes, including narl, narJ, narZ, and nosZ, also rose with increasing amounts of cerium and lanthanum. However, the decrease in narB and nirB gene abundance with increasing REE concentrations was attributed to the reduction of nitrate to amino groups. Our findings highlight the influence of REEs on key soil microorganisms associated with soil N cycling and organic matter degradation and key functional genes in soil C and N metabolism, with implications for agriculture, environmental protection, and human health.}, }
@article {pmid39625614, year = {2024}, author = {Saeng-Kla, K and Mhuantong, W and Termsaithong, T and Pinyakong, O and Sonthiphand, P}, title = {Biodegradation of Di-2-Ethylhexyl Phthalate by Mangrove Sediment Microbiome Impacted by Chronic Plastic Waste.}, journal = {Marine biotechnology (New York, N.Y.)}, volume = {27}, number = {1}, pages = {19}, pmid = {39625614}, issn = {1436-2236}, support = {FF-072/2567//Mahidol University (Fundamental Fund: fiscal year 2024 by National Science Research and Innovation Fund (NSRF)/ ; }, mesh = {*Diethylhexyl Phthalate/metabolism ; *Geologic Sediments/microbiology ; *Biodegradation, Environmental ; *Microbiota ; Water Pollutants, Chemical/metabolism ; Plastics/metabolism ; Gordonia Bacterium/metabolism/genetics ; Plasticizers/metabolism ; Wetlands ; Bacteria/metabolism/classification/genetics/isolation &amp; purification ; }, abstract = {Plastic pollution through the leaching of di(2-ethylhexyl) phthalate (DEHP), a widely used plasticizer, has led to the emergence of mangrove pollution. This study aimed to assess the DEHP removal efficiency of indigenous mangrove sediment microbiomes and identify key DEHP degraders using microcosm construction and metagenomic analysis. During the 35-day incubation period, the indigenous mangrove sediment microbiome, affected by chronic plastic pollution, demonstrated a 99% degradation efficiency of 200 mg/kg DEHP. Spearman's correlation analysis suggested that Myxococcales, Methyloligellaceae, Mycobacterium, and Micromonospora were potentially responsible for DEHP degradation. Based on PICRUSt2, the DEHP-degrading pathway in the sediment was predicted to be an anaerobic process involving catechol metabolism through catC, pcaD, pcaI, pcaF, and fadA. Efficient bacterial isolates from the mangrove sediment, identified as Gordonia sp. and Gordonia polyisoprenivorans, were able to degrade DEHP (65-97%) within 7 days and showed the ability to degrade other phthalate esters (PAEs).}, }
@article {pmid39623774, year = {2025}, author = {Hu, Y and Wang, ML and Yang, RL and Shao, ZK and Du, YH and Kang, Y and Zhu, YX and Xue, XF}, title = {Symbiotic bacteria play crucial roles in a herbivorous mite host suitability.}, journal = {Pest management science}, volume = {81}, number = {3}, pages = {1657-1668}, doi = {10.1002/ps.8571}, pmid = {39623774}, issn = {1526-4998}, support = {//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Symbiosis ; *Herbivory ; *Mites/microbiology/physiology ; RNA, Ribosomal, 16S/analysis ; Solanum lycopersicum ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota ; *Bacterial Physiological Phenomena ; }, abstract = {BACKGROUND: The tomato russet mite (TRM), Aculops lycopersici, is a strictly herbivorous and economically significant pest that infests Solanaceae plants, but its host suitability varies, showing high performance on tomatoes. Although symbiotic bacteria have been suggested to play crucial roles in the host adaptation of herbivores, their effects on TRM remain unclear.<br><br>RESULTS: In this study, using next generation high-throughput sequencing of the bacterial 16S rRNA data, we identified the bacterial diversity and community composition of TRM feeding on tomato, eggplant, and chili. Our results show no significant difference in the bacterial community composition of TRM across three host plants. However, the relative density of Escherichia coli (TRM_Escherichia) showed 9.36-fold higher on tomato than on eggplant and chili. These results align with the observed TRM performance among three host plants. When TRM_Escherichia was reduced using antibiotics, the treated TRM decreased the population density on tomato. However, when we transferred TRM from eggplant to tomato, the population density of TRM increased, coinciding with an increase of the TRM_Escherichia density. These results indicate that TRM_Escherichia may affect the host suitability of TRM. Our fluorescence in situ hybridization (FISH) results further showed that TRM_Escherichia is primarily distributed in the salivary glands. Metagenomic data results suggest that TRM_Escherichia functions in food digestion and energy metabolism.<br><br>CONCLUSION: We provided the first comprehensive analysis of TRM bacterial communities. Our findings demonstrate that the symbiotic bacterium TRM_Escherichia may play crucial roles in the suitability of TRM feeding on different Solanaceae hosts. &#xa9; 2024 Society of Chemical Industry.}, }
@article {pmid39623529, year = {2024}, author = {Ma, J and Sun, S and Cheng, X and Meng, C and Zhao, H and Fu, W and Gao, Y and Ma, L and Yang, Z and Yao, H and Su, J}, title = {Unraveling the role of gut microbiome in predicting adverse events in neoadjuvant therapy for rectal cancer.}, journal = {Human vaccines &amp; immunotherapeutics}, volume = {20}, number = {1}, pages = {2430087}, pmid = {39623529}, issn = {2164-554X}, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Chemoradiotherapy/adverse effects/methods ; *Feces/microbiology ; *Gastrointestinal Microbiome ; Immunotherapy/methods/adverse effects ; Metabolome ; Metabolomics ; Metagenomics/methods ; *Neoadjuvant Therapy/adverse effects/methods ; *Rectal Neoplasms/therapy/microbiology ; }, abstract = {Some patients may develop adverse events during neoadjuvant chemoradiotherapy combined with immunotherapy, influencing response rates. The roles of intestinal microbiome and its metabolites in therapeutic adverse events remain unclear. We collected baseline fecal samples from 21 patients with adverse events (AE group) and 11 patients without adverse events (Non-AE group). Their microbiota and metabolome were characterized using metagenomic shotgun sequencing and untargeted metabolomics. At the species level, the gut microbiota in the Non-AE group exhibits significantly higher abundance of Clostridium sp. Alistipes sp. and lower abundance of Lachnoclostridium sp. Weissella cibaria, Weissella confusa, compared to the AE group (p < .05). A total of 58 discriminative metabolites were identified between groups. Beta-alanine metabolism was scattered. Boc-beta-cyano-L-alanine and CoQ9 were significantly increased in patients without adverse events, while linoleic acid increased in patients with adverse events. The increased Alistipes sp. in the Non-AE group was positively correlated with Boc-beta-cyano-L-alanine and negatively correlated with linoleic acid (p < .05). We constructed a combined microbiome-metabolite model to distinguish Non-AE and AE patients with an AUC of 0.963 via the random forest algorithm. Our findings provided a novel insight into the interplay of multispecies microbial cluster and metabolites of rectal patients with adverse events in neoadjuvant chemoradiotherapy combined with immunotherapy. These microbiota and metabolites deserve further investigations to reveal their roles in adverse events, providing clues for better treatment scenarios.Trial registration number: ClinicalTrials.gov identifier: NCT05368051.}, }
@article {pmid39622769, year = {2025}, author = {Ivan, FX and Tiew, PY and Jaggi, TK and Thng, KX and Pang, PH and Ong, TH and Abisheganaden, JA and Koh, MS and Chotirmall, SH}, title = {Sputum metagenomics reveals a multidrug resistant Pseudomonas-dominant severe asthma phenotype in an Asian population.}, journal = {Respirology (Carlton, Vic.)}, volume = {30}, number = {3}, pages = {217-229}, doi = {10.1111/resp.14863}, pmid = {39622769}, issn = {1440-1843}, support = {AcRF Tier 1 Grant (RT1/22)//Singapore Ministry of Education/ ; MOH-000710//Singapore Ministry of Health's National Medical Research Council/ ; MOH-001275-00//Singapore Ministry of Health's National Medical Research Council/ ; MOH-001356//Singapore Ministry of Health's National Medical Research Council/ ; MOH-001636//Singapore Ministry of Health's National Medical Research Council/ ; }, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; *Asian People/statistics &amp; numerical data ; *Asthma/microbiology/ethnology ; *Drug Resistance, Multiple, Bacterial/genetics ; *Metagenomics/methods ; Microbiota ; Phenotype ; Prospective Studies ; *Pseudomonas/genetics/isolation &amp; purification ; *Pseudomonas Infections/microbiology/ethnology ; Severity of Illness Index ; Singapore/epidemiology ; *Sputum/microbiology ; }, abstract = {BACKGROUND AND OBJECTIVE: While the lung microbiome in severe asthma has been studied, work has employed targeted amplicon-based sequencing approaches without functional assessment with none focused on multi-ethnic Asian populations. Here we investigate the clinical relevance of microbial phenotypes of severe asthma in Asians using metagenomics.<br><br>METHODS: Prospective assessment of clinical, radiological, and immunological measures were performed in a multi-ethnic Asian severe asthma cohort (N&#x2009;=&#x2009;70) recruited across two centres in Singapore. Sputum was subjected to shotgun metagenomic sequencing and patients followed up for a 2-year period. Metagenomic assessment of sputum microbiomes, resistomes and virulomes were related to clinical outcomes.<br><br>RESULTS: The lung microbiome in a multi-ethnic Asian cohort with severe asthma demonstrates an increased abundance of Pseudomonas species. Unsupervised clustering of sputum metagenomes identified two patient clusters: C1 (n&#x2009;=&#x2009;52) characterized by upper airway commensals and C2 (n&#x2009;=&#x2009;18) dominated by established respiratory pathogens including M. catarrhalis, S. aureus and most significantly P. aeruginosa. C2 patients demonstrated a significantly increased exacerbation frequency on 2-year follow up and an antimicrobial resistome characterized by multidrug resistance. Virulomes appear indistinguishable between severe asthmatics with or without co-existing bronchiectasis, and C2 patients exhibit increased gene expression related to biofilm formation, effector delivery systems and microbial motility. Independent comparison of the C2 cluster to a non-asthmatic bronchiectasis cohort demonstrates analogous airway microbial virulence patterns.<br><br>CONCLUSION: Sputum metagenomics demonstrates a multidrug-resistant Pseudomonas-dominant severe asthma phenotype in Asians, characterized by poor clinical outcome including increased exacerbations which is independent of co-existing bronchiectasis.}, }
@article {pmid39621710, year = {2024}, author = {Mangoma, N and Zhou, N and Ncube, T}, title = {Metagenome-assembled genomes provide insight into the microbial taxonomy and ecology of the Buhera soda pans, Zimbabwe.}, journal = {PloS one}, volume = {19}, number = {12}, pages = {e0299620}, pmid = {39621710}, issn = {1932-6203}, mesh = {Zimbabwe ; *Metagenome ; *Phylogeny ; Metagenomics/methods ; Bacteria/genetics/classification ; Genome, Bacterial ; Ecosystem ; Microbiota/genetics ; Extreme Environments ; }, abstract = {The use of metagenomics has substantially improved our understanding of the taxonomy, phylogeny and ecology of extreme environment microbiomes. Advances in bioinformatics now permit the reconstruction of almost intact microbial genomes, called metagenome-assembled genomes (MAGs), from metagenomic sequence data, allowing for more precise cell-level taxonomic, phylogenetic and functional profiling of uncultured extremophiles. Here, we report on the recovery and characterisation of metagenome-assembled genomes from the Buhera soda pans located in eastern Zimbabwe. This ecosystem has not been studied despite its unique geochemistry and potential as a habitat for unique microorganisms. Metagenomic DNA from the soda pan was sequenced using the DNA Nanoball Sequencing (DNBSEQR) technique. Sequence analysis, done on the Knowledgebase (KBase) platform, involved quality assessment, read assembly, contig binning, and MAG extraction. The MAGs were subjected to taxonomic placement, phylogenetic profiling and functional annotation in order to establish their possible ecological roles in the soda pan ecosystem. A total of 16 bacterial MAGs of medium to high quality were recovered, all distributed among five phyla dominated by Pseudomonadota and Bacillota. Of the ten MAGs that were taxonomically classified up to genus level, five of them belonged to the halophilic/ haloalkaliphilic genera Alkalibacterium, Vibrio, Thioalkalivibrio, Cecembia and Nitrincola, underscoring the importance of haloalkaliphiles in the Buhera soda pans. Functional profiling revealed the possession of diverse carbohydrate-metabolising pathways by the MAGs, with glycolysis and the pentose phosphate pathways appearing to be key pathways in this ecosystem. Several MAGs possessed pathways that implicated them in some key aspects of the nitrogen and sulphur cycle. Some MAGs harboured both sulphate reduction and respiratory pathways, suggesting a possible mechanism of ATP biosynthesis through sulphate respiration. This study demonstrates the feasibility of the recovery and taxonomic and functional annotation of high quality microbial genomes from extreme environments, making it possible to establish the ecological roles and biotechnological potential of uncultured microorganisms.}, }
@article {pmid39621607, year = {2024}, author = {Deel, HL and Manter, DK and Moore, JM}, title = {Rethreading the needle: A novel molecular index of soil health (MISH) using microbial functional genes to predict soil health management.}, journal = {PloS one}, volume = {19}, number = {12}, pages = {e0314072}, pmid = {39621607}, issn = {1932-6203}, mesh = {*Soil Microbiology ; *Soil/chemistry ; *RNA, Ribosomal, 16S/genetics ; Metagenome ; Bacteria/genetics/classification/isolation &amp; purification ; Microbiota/genetics ; Machine Learning ; Ecosystem ; Genes, Microbial ; }, abstract = {Soil health relies on the actions and interactions of an abundant and diverse biological community. Current soil health assessments rely heavily on a suite of soil biological, chemical, and physical indicators, often excluding molecular information. Soil health is critical for sustainable agricultural production, and a comprehensive understanding of how microbial communities provide ecosystem services can help guide management practices. To explore the role of microbial function in soil health, 536 soil samples were collected from 26 U.S. states, representing 52 different crops and grazing lands, and analyzed for various soil health indicators. The bacterial functional profile was characterized using 16S ribosomal RNA gene sequencing paired with PICRUSt2 to predict metagenome functions. Functional data were used as predictors in eXtreme Gradient Boosting (XGBoost), a powerful machine learning algorithm, and enzymes important to soil health indicators were compiled into a Molecular Index of Soil Health (MISH). The overall MISH score significantly correlated with non-molecular measures of soil health and management practice adoption. Additionally, several new enzymes were identified as potential targets to better understand microbial mediation of soil health. This low-cost, DNA-based approach to measuring soil health is robust and generalizable across climates.}, }
@article {pmid39621089, year = {2025}, author = {Singh, K and Gupta, JK and Chanchal, DK and Shinde, MG and Kumar, S and Jain, D and Almarhoon, ZM and Alshahrani, AM and Calina, D and Sharifi-Rad, J and Tripathi, A}, title = {Natural products as drug leads: exploring their potential in drug discovery and development.}, journal = {Naunyn-Schmiedeberg's archives of pharmacology}, volume = {398}, number = {5}, pages = {4673-4687}, pmid = {39621089}, issn = {1432-1912}, mesh = {*Biological Products/pharmacology/chemistry ; *Drug Discovery/methods ; Humans ; Animals ; *Drug Development/methods ; Plants, Medicinal/chemistry ; Machine Learning ; }, abstract = {Natural products have been pivotal in drug discovery, offering a wealth of bioactive compounds that significantly contribute to therapeutic developments. Despite the rise of synthetic chemistry, natural products continue to play a crucial role due to their unique chemical structures and diverse biological activities. This study reviews and evaluates the potential of natural products in drug discovery and development, emphasizing the integration of traditional knowledge with modern drug discovery methodologies and addressing the associated challenges. A comprehensive literature search was conducted across PubMed/MedLine, Scopus, Web of Science, Google Scholar, and Cochrane Library, covering publications from 2000 to 2023. Inclusion criteria focused on studies related to natural products, bioactive compounds, medicinal plants, phytochemistry, and AI applications in drug discovery. Data were categorized into source, extraction methods, bioactivity assays, and technological advances. The current review underscores the historical and ongoing importance of natural products in drug discovery. Technological advancements in chromatographic and spectroscopic techniques have improved the isolation and structural elucidation of bioactive compounds. AI and machine learning have streamlined the identification and optimization of natural product leads. Challenges such as biodiversity sustainability and development complexities are discussed, alongside innovative approaches like biosynthetic engineering and metagenomics. Natural products remain a vital source of novel therapeutic agents, providing unique chemical diversity and specific biological activities. Integrating traditional knowledge with modern scientific methods is essential for maximizing the potential of natural products in drug discovery. Despite existing challenges, ongoing research and technological advancements are expected to enhance the efficiency and success of natural product-based drug development.}, }
@article {pmid39620486, year = {2024}, author = {Luo, Y and Sheikh, TMM and Li, X and Yuan, Y and Yao, F and Wang, M and Guo, X and Wu, J and Shafiq, M and Xie, Q and Jiao, X}, title = {Exploring the dynamics of gut microbiota, antibiotic resistance, and chemotherapy impact in acute leukemia patients: A comprehensive metagenomic analysis.}, journal = {Virulence}, volume = {15}, number = {1}, pages = {2428843}, pmid = {39620486}, issn = {2150-5608}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Metagenomics ; *Anti-Bacterial Agents/pharmacology/therapeutic use ; Male ; Female ; Adult ; Middle Aged ; Feces/microbiology ; Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Leukemia/drug therapy/microbiology/complications ; Drug Resistance, Microbial/genetics ; Aged ; Young Adult ; Antineoplastic Agents/adverse effects ; }, abstract = {Leukemia poses significant challenges to its treatment, and understanding its complex pathogenesis is crucial. This study used metagenomic sequencing to investigate the interplay between chemotherapy, gut microbiota, and antibiotic resistance in patients with acute leukemia (AL). Pre- and post-chemotherapy stool samples from patients revealed alterations in microbial richness, taxa, and antibiotic resistance genes (ARGs). The analysis revealed a decreased alpha diversity, increased dispersion in post-chemotherapy samples, and changes in the abundance of specific bacteria. Key bacteria such as Enterococcus, Klebsiella, and Escherichia coli have been identified as prevalent ARG carriers. Correlation analysis between gut microbiota and blood indicators revealed potential links between microbial species and inflammatory biomarkers, including C-reactive protein (CRP) and adenosine deaminase (ADA). This study investigated the impact of antibiotic dosage on microbiota and ARGs, revealing networks connecting co-occurring ARGs with microbial species (179 nodes, 206 edges), and networks associated with ARGs and antibiotic dosages (50 nodes, 50 edges). Antibiotics such as cephamycin and sulfonamide led to multidrug-resistant Klebsiella colonization. Our analyses revealed distinct microbial profiles with Salmonella enterica elevated post-chemotherapy in NF patients and Akkermansia muciniphila elevated pre-chemotherapy. These microbial signatures could inform strategies to modulate the gut microbiome, potentially mitigating the risk of neutropenic fever in patients undergoing chemotherapy. Finally, a comprehensive analysis of KEGG modules shed light on disrupted metabolic pathways after chemotherapy, providing insights into potential targets for managing side effects. Overall, this study revealed intricate relationships between gut microbiota, chemotherapy, and antibiotic resistance, providing new insights into improving therapy and enhancing patient outcomes.}, }
@article {pmid39620359, year = {2024}, author = {López-Agudelo, VA and Falk-Paulsen, M and Bharti, R and Rehman, A and Sommer, F and Wacker, EM and Ellinghaus, D and Luzius, A and Sievers, LK and Liebeke, M and Kaser, A and Rosenstiel, P}, title = {Defective Atg16l1 in intestinal epithelial cells links to altered fecal microbiota and metabolic shifts during pregnancy in mice.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2429267}, pmid = {39620359}, issn = {1949-0984}, mesh = {Animals ; Female ; Pregnancy ; *Gastrointestinal Microbiome ; Mice ; *Feces/microbiology ; *Autophagy-Related Proteins/genetics/metabolism ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; RNA, Ribosomal, 16S/genetics ; Intestinal Mucosa/microbiology/metabolism ; Epithelial Cells/microbiology/metabolism ; Crohn Disease/microbiology/metabolism ; Mice, Inbred C57BL ; Metagenomics ; Chemokine CXCL1/genetics/metabolism ; }, abstract = {Throughout gestation, the female body undergoes a series of transformations, including profound alterations in intestinal microbial communities. Changes gradually increase toward the end of pregnancy and comprise reduced α-diversity of microbial communities and an increased propensity for energy harvest. Despite the importance of the intestinal microbiota for the pathophysiology of inflammatory bowel diseases, very little is known about the relationship between these microbiota shifts and pregnancy-associated complications of the disease. Here, we explored the longitudinal dynamics of gut microbiota composition and functional potential during pregnancy and after lactation in Atg16l1[∆IEC] mice carrying an intestinal epithelial deletion of the Crohn's disease risk gene Atg16l1. Using 16S rRNA amplicon and shotgun metagenomic sequencing, we demonstrated divergent temporal shifts in microbial composition between Atg16l1 wildtype and Atg16l1[∆IEC] pregnant mice in trimester 3, which was validated in an independent experiment. Observed differences included microbial genera implicated in IBD such as Lachnospiraceae, Roseburia, Ruminococcus, and Turicibacter. Changes partially recovered after lactation. Additionally, metagenomic and metabolomic analyses suggest an increased capacity for chitin degradation, resulting in higher levels of free N-acetyl-glucosamine products in feces, alongside reduced glucose and myo-inositol levels in serum around the time of delivery. On the host side, we found that the immunological response of Atg16l1[∆IEC] mice is characterized by higher colonic mRNA levels of TNFα and CXCL1 in trimester 3 and a lower weight of offspring at birth. Understanding pregnancy-dependent microbiome changes in the context of IBD may constitute the first step in the identification of fecal microbial biomarkers and microbiota-directed therapies that could help improve precision care for managing pregnancies in IBD patients.}, }
@article {pmid39619205, year = {2024}, author = {Hewson, I and Brandt, M and Budd, K and Breitbart, M and DeRito, C and Gittens, S and Henson, MW and Hylkema, A and Sevier, M and Souza, M and Vilanova-Cuevas, B and Von Hoene, S}, title = {Viral metagenomic investigation of two Caribbean echinoderms, Diadema antillarum (Echinoidea) and Holothuria floridana (Holothuria).}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18321}, pmid = {39619205}, issn = {2167-8359}, mesh = {Animals ; *Metagenomics ; Caribbean Region ; *Genome, Viral/genetics ; Echinodermata/virology ; Metagenome ; Holothuria/virology/genetics ; Coral Reefs ; Viruses/genetics/isolation &amp; purification/classification ; Virome/genetics ; }, abstract = {BACKGROUND: Echinoderms play crucial roles in coral reef ecosystems, where they are significant detritivores and herbivores. The phylum is widely known for its boom and bust cycles, driven by food availability, predation pressure and mass mortalities. Hence, surveillance of potential pathogens and associates of grossly normal specimens is important to understanding their roles in ecology and mass mortality.<br><br>METHODS: We performed viral surveillance in two common coral reef echinoderms, Diadema antillarum and Holothuria floridana, using metagenomics. Urchin specimens were obtained during the 2022 Diadema antillarum scuticociliatosis mass mortality event from the Caribbean and grossly normal H. floridana specimens from a reef in Florida. Viral metagenomes were assembled and aligned against viral genomes and protein encoding regions. Metagenomic reads and previously sequenced transcriptomes were further investigated for putative viral elements by Kraken2.<br><br>RESULTS: D. antillarum was devoid of viruses typically seen in echinoderms, but H. floridana yielded viral taxa similar to those found in other sea cucumbers, including Pisoniviricetes (Picornaviruses), Ellioviricetes (Bunyaviruses), and Magsaviricetes (Nodaviruses). The lack of viruses detected in D. antillarum may be due to the large amount of host DNA in viral metagenomes, or because viruses are less abundant in D. antillarum tissues when compared to H. floridana tissues. Our results also suggest that RNA amplification approach may influence viral representation in viral metagenomes. While our survey was successful in describing viruses associated with both echinoderms, our results indicate that viruses are less pronounced in D. antillarum than in other echinoderms. These results are important in context of wider investigation on the association between viruses and D. antillarum mass mortalities, since the conventional method used in this study was unsuccessful.}, }
@article {pmid39616358, year = {2024}, author = {Dell'Olio, A and Scott, WT and Taroncher-Ferrer, S and San Onofre, N and Soriano, JM and Rubert, J}, title = {Tailored impact of dietary fibers on gut microbiota: a multi-omics comparison on the lean and obese microbial communities.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {250}, pmid = {39616358}, issn = {2049-2618}, support = {79441//'European Union's Horizon 2020 Research and Innovation programme' for the Marie Sk&#x142;odowska-Curie/ ; RYC2018-024850-I//Spanish Ministry of Science and Innovation for the Ram&#xf3;n y Cajal fellowship/ ; }, mesh = {*Dietary Fiber/metabolism ; *Obesity/microbiology ; *Gastrointestinal Microbiome ; *Malus/microbiology ; Humans ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics ; Pectins/metabolism ; Metabolomics ; Cellulose/metabolism ; Bioreactors/microbiology ; Multiomics ; }, abstract = {BACKGROUND: Previous studies have shown that microbial communities differ in obese and lean individuals, and dietary fiber can help reduce obesity-related conditions through diet-gut microbiota interactions. However, the mechanisms by which dietary fibers shape the gut microbiota still need to be elucidated. In this in vitro study, we examined how apple fibers affect lean and obese microbial communities on a global scale. We employed a high-throughput micro-matrix bioreactor system and a multi-omics approach to identify the key microorganisms and metabolites involved in this process.<br><br>RESULTS: Initially, metagenomics and metabolomics data indicated that obese and lean microbial communities had distinct starting microbial communities. We found that obese microbial community had different characteristics, including higher levels of Ruminococcus bromii and lower levels of Faecalibacterium prausnitzii, along with an increased Firmicutes:Bacteroides ratio. Afterward, we exposed obese and lean microbial communities to an apple as a representative complex food matrix, apple pectin as a soluble fiber, and cellulose as an insoluble fiber. Dietary fibers, particularly apple pectin, reduced Acidaminococcus intestini and boosted Megasphaera and Akkermansia in the obese microbial community. Additionally, these fibers altered the production of metabolites, increasing beneficial indole microbial metabolites. Our results underscored the ability of apple and apple pectin to shape the obese gut microbiota.<br><br>CONCLUSION: We found that the obese microbial community had higher branched-chain amino acid catabolism and hexanoic acid production, potentially impacting energy balance. Apple dietary fibers, especially pectin, influenced the obese microbial community, altering both species and metabolites. Notably, the apple pectin feeding condition affected species like Klebsiella pneumoniae and Bifidobacterium longum. By using genome-scale metabolic modeling, we discovered a mutualistic cross-feeding relationship between Megasphaera sp. MJR8396C and Bifidobacterium adolescentis. This in vitro study suggests that incorporating apple fibers into the diets of obese individuals can help modify the composition of gut bacteria and improve metabolic health. This personalized approach could help mitigate the effects of obesity. Video Abstract.}, }
@article {pmid39616151, year = {2024}, author = {Wang, J and Zhong, H and Chen, Q and Ni, J}, title = {Adaption mechanism and ecological role of CPR bacteria in brackish-saline groundwater.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {141}, pmid = {39616151}, issn = {2055-5008}, support = {52070002, 51721006, 51925901//National Natural Science Foundation of China (National Science Foundation of China)/ ; 52209078//National Natural Science Foundation of China (National Science Foundation of China)/ ; 2023T160020//China Postdoctoral Science Foundation/ ; }, mesh = {*Groundwater/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification ; *Phylogeny ; Salinity ; Biodiversity ; Metagenome ; Adaptation, Physiological ; Nitrogen/metabolism ; Carbon/metabolism ; Sulfur/metabolism ; Metagenomics/methods ; Bacterial Physiological Phenomena ; }, abstract = {Candidate phyla radiation (CPR) constitutes a substantial fraction of bacterial diversity, yet their survival strategies and biogeochemical roles in brackish-saline groundwater remain unknown. By reconstructing 399 CPR metagenome-assembled genomes (MAGs) and 2007 non-CPR MAGs, we found that CPR, affiliated with 44 previously proposed phyla and 8 putative novel phyla, played crucial roles in maintaining the microbial stability and complexity in groundwater. Metabolic reconstructions revealed that CPR participated in diverse processes, including carbon, nitrogen, and sulfur cycles. Adaption of CPR to high-salinity conditions could be attributed to abundant genes associated with heat shock proteins, osmoprotectants, and sulfur reduction, as well as their cooperation with Co-CPR (non-CPR bacteria co-occurred with CPR) for metabolic support and resource exchange. Our study enhanced the understanding of CPR biodiversity in high-salinity groundwater, highlighting the collaborative roles of self-adaptive CPR bacteria and their reciprocal partners in coping with salinity stress, maintaining ecological stability, and mediating biogeochemical cycling.}, }
@article {pmid39615467, year = {2025}, author = {Khandeparker, L and Kale, D and Hede, N and Anil, AC}, title = {Application of functional metagenomics in the evaluation of microbial community dynamics in the Arabian Sea: Implications of environmental settings.}, journal = {Journal of environmental management}, volume = {373}, number = {}, pages = {123449}, doi = {10.1016/j.jenvman.2024.123449}, pmid = {39615467}, issn = {1095-8630}, mesh = {*Seawater/microbiology ; *Metagenomics ; *Microbiota ; }, abstract = {Ocean microbial communities form the base of marine food webs, facilitating energy transfer and nutrient cycling, thereby supporting higher trophic levels. We investigated their composition and functional profiles across depths (surface waters 0, 29, and 63 m and bottom waters 100, 150, and 200 m) in the central-eastern Arabian Sea (CEAS) using next-generation sequencing. It was hypothesized that the composition and functional diversity of these communities would be influenced by depth and environmental parameters. Our research showed that microbial communities vary with depth and are shaped by environmental factors like irradiance, temperature, dissolved oxygen, suspended particulate matter, chlorophyll a, and ammonia concentrations. Cyanobacteria (Prochlorococcus sp) and Mamiellaceae, belonging to picoeukaryotes, exhibited distinct depth-specific distributions up to subsurface chlorophyll maxima (SCM) at 63 m. On the other hand, a community shift in the microbial communities comprising Firmicutes, Bacteroidetes, and Actinobacteria phyla was observed at the deeper water depths. The profiling of functional genes pointed out the expression of carbon fixation by photosynthetic organisms at the surface (0, 29, and 63 m), which shifted to prokaryotic carbon fixation in deeper waters (0, 150, and 200 m). Microcosm experiments (mixing of surface water with water from the SCM) carried out simulating disturbances such as climate change forced mixing (cyclones), revealed shifts in microbial structure and function. It was observed that within 48 h, the carbon fixation activity changed from photosynthetic organisms to prokaryotes and indicated an increase in stress-related biosynthetic pathways such as expression of quorum sensing, biosynthesis of antibiotics, lipopolysaccharides, and secondary metabolites. These findings have implications for predictive modelling of food web dynamics and fisheries management in the context of climate change.}, }
@article {pmid39615045, year = {2024}, author = {Valentino, V and De Filippis, F and Marotta, R and Pasolli, E and Ercolini, D}, title = {Genomic features and prevalence of Ruminococcus species in humans are associated with age, lifestyle, and disease.}, journal = {Cell reports}, volume = {43}, number = {12}, pages = {115018}, doi = {10.1016/j.celrep.2024.115018}, pmid = {39615045}, issn = {2211-1247}, mesh = {Humans ; *Ruminococcus/genetics ; *Life Style ; Genome, Bacterial ; Adult ; Gastrointestinal Microbiome/genetics ; Metagenome ; Phylogeny ; Genomics/methods ; Male ; Middle Aged ; Female ; Aged ; }, abstract = {The genus Ruminococcus is dominant in the human gut, but higher levels of some species, such as R. gnavus, R. torques, and R. bromii, have been linked to health or disease. In this study, we analyzed >9,000 Ruminococcus metagenome-assembled genomes (MAGs) reconstructed from >5,000 subjects and revealed significant links between the prevalence of some species/subspecies and geographic origin, age, lifestyle, and disease, with subspecies prevalent in specific subpopulations showing divergent metabolic potential. Furthermore, Ruminococcus species from Lachnospiraceae encoded for carbohydrate-active enzymes (CAZy) potentially involved in the metabolism of human N- and O-glycans, whereas those from Oscillospiraceae appear to be more adapted toward fiber metabolism. These new findings contribute to elucidating the potential functional role of Ruminococcus in specific lifestyles and diseases and to decipher the diversity and the adaptation of members of this genus to the human gut.}, }
@article {pmid39614549, year = {2024}, author = {Wicaksono, WA and Akinyemi, OE and Wassermann, B and Bickel, S and Suwanto, A and Berg, G}, title = {Traditionally produced tempeh harbors more diverse bacteria with more putative health-promoting properties than industrially produced tempeh.}, journal = {Food research international (Ottawa, Ont.)}, volume = {196}, number = {}, pages = {115030}, doi = {10.1016/j.foodres.2024.115030}, pmid = {39614549}, issn = {1873-7145}, mesh = {*Bacteria/genetics/classification/metabolism ; *Food Microbiology ; Humans ; Soy Foods/microbiology ; Fermentation ; Rhizopus/genetics/metabolism ; Hygiene ; Indonesia ; Microbiota ; Fermented Foods/microbiology ; }, abstract = {In recent years, there has been a significant shift towards industrialization in food production, resulting in the implementation of higher hygiene standards globally. Our study focused on examining the impact of hygiene standards on tempeh, a popular Rhizopus-based fermented soybean product native to Indonesia, and now famous around the world. We observed that tempeh produced with standardized hygiene measures exhibited a microbiome with comparable bacterial abundances but a markedly different community structure and function than traditionally produced tempeh. In detail, we found a decreased bacterial abundance of lactobacilli and enterobacteria, bacterial diversity, different indicator taxa, and significantly changed community structure in industrial tempeh. A similar picture was found for functional analysis: the quantity of bacterial genes was similar but qualitative changes were found for genes associated with human health. The resistome of tempeh varied based on its microbiome composition. The higher number of antimicrobial resistance genes in tempeh produced without standardized hygiene measures mainly belong to multidrug efflux pumps known to occur in plant-based food. Our findings were confirmed by functional insights into genomes and metagenome-assembled genomes from the dominant bacteria, e.g. Leuconostoc, Limosilactobacillus, Lactobacillus, Enterococcus, Paenibacillus, Azotobacter and Enterobacter. They harboured an impressive spectrum of genes important for human health, e.g. for production of vitamin B1, B7, B12, and K, iron and zinc transport systems and short chain fatty acid production. In conclusion, industrially produced tempeh harbours a less diverse microbiome than the traditional one. Although this ensures production at large scales as well as biosafety, in the long-term it can lead to potential effects for human gut health.}, }
@article {pmid39614478, year = {2024}, author = {Yu, H and Li, Z and Zheng, D and Chen, C and Ge, C and Tian, H}, title = {Exploring microbial dynamics and metabolic pathways shaping flavor profiles in Huangjiu through metagenomic analysis.}, journal = {Food research international (Ottawa, Ont.)}, volume = {196}, number = {}, pages = {115036}, doi = {10.1016/j.foodres.2024.115036}, pmid = {39614478}, issn = {1873-7145}, mesh = {*Taste ; *Metagenomics/methods ; *Fermentation ; *Wine/microbiology/analysis ; *Metabolic Networks and Pathways ; Microbiota/genetics ; Oryza/microbiology ; Flavoring Agents/metabolism ; Humans ; Food Microbiology ; Odorants/analysis ; Male ; }, abstract = {In the production of Huangjiu (Chinese rice wine), fermentation microbiota plays a crucial role in flavor formation. This study investigates the microbial dynamics and metabolic pathways that shape the flavor profiles of Huangjiu using different starters. Sensory evaluation and metabolite analysis of six starters revealed significant differences in ester, fruity, and sweet aromas. Saccharomyces, Aspergillus, and Rhizopus were identified as the dominant genera significantly impacting fermentation. Metagenomic species and functional gene annotations of Huangjiu starters elucidated the metabolic pathways for key flavor compounds synthesis pathways. Enzyme genes involved in these pathways were classified and annotated to microbial genera using the NR database, identifying 231 classes of relevant catalytic enzymes and 154 microbial genera. A metabolic relationship between flavor compound formation and different microbial genera was established using catalytic enzymes as a bridge. This study highlights the impact of starter composition on the final product and provides new insights for optimizing starters to enhance Huangjiu flavor quality.}, }
@article {pmid39614477, year = {2024}, author = {Yang, L and Fan, W and Xu, Y}, title = {Effects of storage period and season on the microecological characteristics of Jiangxiangxing high-temperature Daqu.}, journal = {Food research international (Ottawa, Ont.)}, volume = {196}, number = {}, pages = {115034}, doi = {10.1016/j.foodres.2024.115034}, pmid = {39614477}, issn = {1873-7145}, mesh = {*Seasons ; *Hot Temperature ; *Food Storage/methods ; *Microbiota ; Fermentation ; Bacteria/metabolism/classification ; Food Microbiology ; Metabolomics ; Proteomics ; China ; Metagenomics ; Camellia sinensis/microbiology/metabolism ; Fungi/metabolism/classification ; }, abstract = {Metagenomics, non-targeted metabolomics, and metaproteomics were employed to analyze the microecological succession of high-temperature Daqu during storage, elucidate the adaptation mechanism of the microbial community of Daqu to storage environments, and clarify the microecological characteristics of Daqu during different seasons. During storage, the relative abundances of Bacillus, Oceanobacillus, Staphylococcus, and Aspergillus in Daqu had significantly increased, while those of Kroppenstedtia, Saccharopolyspora, Thermoascus, and Thermomyces had significantly decreased. During the first 3 months of storage, compound metabolism of Daqu was primarily dominated by generation of small molecular substances and then shifted to metabolism of amino sugars. During the storage process, homogeneous selection (15.57 %) and homogeneous diffusion (14.86 %) of the microbial communities of Daqu were much larger than during the fermentation process, while the variable selection assembly (29.43 %) was smaller than during the fermentation process. Among the 2509 proteins identified in the four-season Daqu, bacterial protein expression was 1.46-fold greater than that of fungi. Seasonal factors influenced the function of Daqu by alterations to Bacillus subtilis, Oceanobacillus iheyensis, and Aspergillus nidulans and other microbial functions. Carbon and benzoic acid metabolism of Daqu was relatively increased during the spring, while metabolism of alkaloids and tyrosine was upregulated during the summer, amino acid synthesis and starch metabolism were enriched during the autumn, and peptidoglycan synthesis was relatively greater during the winter. Adjusting the moisture content of Daqu during the storage period was shown to reduce microecological differentiation caused by seasonal temperature variations.}, }
@article {pmid39614169, year = {2024}, author = {Tang, H and Du, S and Niu, Z and Zhang, D and Tang, Z and Chen, H and Chen, Z and Zhang, M and Xu, Y and Sun, Y and Fu, X and Norback, D and Shao, J and Zhao, Z}, title = {Nasal, dermal, oral and indoor dust microbe and their interrelationship in children with allergic rhinitis.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {505}, pmid = {39614169}, issn = {1471-2180}, mesh = {Humans ; *Dust/analysis ; Male ; Child ; Female ; *Rhinitis, Allergic/microbiology ; Case-Control Studies ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/isolation &amp; purification/genetics ; *Skin/microbiology ; *Mouth/microbiology ; *Microbiota ; Nasal Cavity/microbiology ; Air Pollution, Indoor/analysis ; Child, Preschool ; Metagenomics/methods ; Nose/microbiology ; }, abstract = {BACKGROUND: Allergic rhinitis (AR) subjects might have their microenvironment changed due to pathogenesis and living environment. Whether the nasal microbe in AR children differs from healthy subjects and how it interplays with dermal, oral and indoor dust microbe needs to be elucidated.<br><br>METHODS: In this case-control study, we analyzed and compared the bacterial characterization and associations in nasal, dermal, oral swab samples and dust samples in 62 children with physician-diagnosed AR(cases) and 51 age- and gender-matched healthy ones with no history of allergic diseases(controls). Full-length 16S rRNA sequencing(swabs) and shotgun metagenomics(dust) were applied. Bacterial diversity, composition, abundance difference characteristics and fast expectation-maximization for microbial source tracking(FEAST) analysis were performed and compared between cases and controls.<br><br>RESULTS: The &#x3b1;-diversity of dust microorganisms in AR was lower than that in control group (P&#x2009;=&#x2009;0.034), and the &#x3b2;-diversity indices of microorganisms in nasal cavity (P&#x2009;=&#x2009;0.020), skin (P&#x2009;=&#x2009;0.001) and dust (P&#x2009;=&#x2009;0.004) were significantly different from those in control group. At species levels, a total of 10, 15, 12, and 15 bacterial species were differentially enriched in either cases or controls in nasal, dermal, oral, and dust samples, respectively(Linear Discriminant Analysis(LDA) score&#x2009;>&#x2009;2, P&#x2009;<&#x2009;0.05). Staphylococcus epidermidis was the single species simultaneously more abundant in nasal, dermal and dust samples in AR children. By FEAST analysis, 8.85% and 10.11% of S. epidermidis in AR dermal and dust samples came from nasal cavity. These proportions were significantly higher than those in controls (2.70% and 3.86%) (P&#x2009;<&#x2009;0.05). The same significantly higher transfer proportions(P&#x2009;<&#x2009;0.05) were observed for Staphylococcus aureus enriched in the nasal cavity in AR children. Classification models by random forest regression at species levels showed, bacterial species enriched in indoor dust, nasal and dermal samples had substantial power in distinguishing AR children from healthy ones, with the highest power in the dust samples (AUC&#x2009;=&#x2009;0.88) followed by nasal(AUC&#x2009;=&#x2009;0.81) and dermal ones(AUC&#x2009;=&#x2009;0.80).<br><br>CONCLUSIONS: Our study presented the microbial enrichment characteristics in AR children both in the living environment(dust) and body sites exposed to environment through inhalation(nasal cavity), contact(skin) and ingestion(oral cavity) pathways, respectively. Nasal S.epidermidis and S.aureus had dominant influences on dust and other body sites in AR children.}, }
@article {pmid39614167, year = {2024}, author = {Mangoma, N and Zhou, N and Ncube, T}, title = {Metagenomic insights into the microbial community of the Buhera soda pans, Zimbabwe.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {510}, pmid = {39614167}, issn = {1471-2180}, mesh = {Zimbabwe ; *Metagenomics ; *Bacteria/genetics/classification/isolation &amp; purification/metabolism ; *Microbiota/genetics ; Salinity ; Phylogeny ; Hydrogen-Ion Concentration ; Archaea/genetics/classification/metabolism/isolation &amp; purification ; Water Microbiology ; }, abstract = {BACKGROUND: Soda pans are unique, natural aquatic environments characterised by elevated salinity and alkalinity, creating a distinctive and often extreme geochemistry. The microbiomes of soda pans are unique, with extremophiles such as halophiles, alkaliphiles and haloalkaliphiles being important. Despite being dominated by mostly unculturable inhabitants, soda pans hold immense biotechnological potential. The application of modern "omics-based" techniques helps us better understand the ecology and true extend of the biotechnological potential of soda pan microbiomes. In this study, we used a shotgun metagenomic approach to determine the microbial diversity and functional profile of previously unexplored soda pans located in Buhera, Eastern Zimbabwe. A combination of titrimetry and inductively coupled plasma optical emission spectroscopy (ICP‒OES) was used to perform physico-chemical analysis of the soda pan water.<br><br>RESULTS: Physicochemical analysis revealed that the Buhera soda pans are highly alkaline, with a pH range of 8.74 to 11.03, moderately saline (2.94 - 7.55 g/L), and have high carbonate (3625 mg/L) and bicarbonate ion (1325 mg/L) alkalinity. High levels of sulphate, phosphate, chloride and fluoride ions were detected. Metagenomic analysis revealed that domain Bacteria dominated the soda pan microbial community, with Pseudomonadota and Bacillota being the dominant phyla. Vibrio was shown to be the predominant genus, followed by Clostridium, Candidatus Brevefilum, Acetoanaerobium, Thioalkalivibrio and Marinilactibacillus. Archaea were also detected, albeit at a low prevalence of 1%. Functional profiling revealed that the Buhera soda pan microbiome is functionally diverse, has hydrolytic-enzyme production potential and is capable of supporting a variety of geochemical cycles.<br><br>CONCLUSIONS: The results of this pioneering study showed that despite their extreme alkalinity and moderate salinity, the Buhera soda pans harbour a taxonomically and functionally diverse microbiome dominated by bacteria. Future work will aim towards establishing the full extent of the soda pan's biotechnological potential, with a particular emphasis on potential enzyme production.}, }
@article {pmid39612821, year = {2025}, author = {Rosenqvist, T and Hilding, J and Suarez, C and Paul, CJ}, title = {Microbial communities in slow sand filters for drinking water treatment adapt to organic matter altered by ozonation.}, journal = {Water research}, volume = {270}, number = {}, pages = {122843}, doi = {10.1016/j.watres.2024.122843}, pmid = {39612821}, issn = {1879-2448}, mesh = {*Ozone ; *Drinking Water/microbiology ; *Water Purification/methods ; *Filtration ; Sand ; Bacteria/genetics ; Microbiota ; }, abstract = {Changing natural organic matter quality from anthropogenic activity and stricter requirements for micropollutant removal challenges existing systems for drinking water production. Ozonation of water followed by biofiltration, such as passage through a slow sand filter (SSF), is a partial solution. Biofiltration relies on biofilms (microbial communities within extracellular matrices). However, the effects of ozonation on SSF microbial communities are unknown. In this study, genome-resolved and read-based metagenomics were used to compare the microbial communities of two full-scale SSFs employing conventional pre-treatment to a 20 m[2] SSF operated in parallel with ozonation as additional pre-treatment. The SSF microbial community receiving ozonated water was less diverse than those receiving non-ozonated water. Families Hyphomicrobiaceae, Acetobacteraceae, Sphingomonadaceae and Burkholderiaceae were more abundant when ozone was used, as were genes for metabolism of single-carbon organic compounds. Conversely, genes for metabolism of aromatic compounds and fatty acids were less abundant. Metagenome assembled genomes associated with the non-ozonated SSFs were enriched with several glycoside hydrolases, while those associated with the ozonated SSF were enriched with genes for 1-2 carbon compound metabolism. No indications of increased microbial risk (pathogens or antibiotic resistance genes) were detected as a consequence of ozonation. This study shows how microbial communities of SSFs adapt to changes in organic matter quality, highlighting the key role of biofilters for production of safe and sustainable drinking water in a changing climate.}, }
@article {pmid39611812, year = {2025}, author = {Shi, M and Zhao, B and Cai, W and Yuan, H and Liang, X and Li, Z and Liu, X and Jin, Y and Liu, X and Wei, C}, title = {Multi-omics mechanical analysis of gut microbiota, carboxylic acids, and cardiac gene expression interaction triggering diabetic cardiomyopathy.}, journal = {mSystems}, volume = {10}, number = {1}, pages = {e0145024}, pmid = {39611812}, issn = {2379-5077}, support = {82170268,82200482//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Diabetic Cardiomyopathies/genetics/metabolism/microbiology ; Mice ; *Carboxylic Acids/metabolism ; Male ; Metabolomics/methods ; Transcriptome ; Mice, Inbred C57BL ; Metagenomics ; Diabetes Mellitus, Type 2/metabolism/genetics/microbiology/complications ; Myocardium/metabolism ; Multiomics ; }, abstract = {UNLABELLED: It is well known that gut microbial imbalance is a potential factor for the occurrence and development of diabetes mellitus (DM) and its complications. Moreover, the heart and gut microbiota can regulate each other through the gut-metabolite-heart axis. In this study, metagenomics, metabolomics, and transcriptomics were chosen to sequence the changes in gut microbiota, serum metabolite levels, and differentially expressed genes (DEGs) in leptin receptor-deficient db/db mice and analyze the correlation between serum metabolites and gut microbiota or DEGs. According to the results, there were significant differences in the 1,029 cardiac genes and 353 serum metabolites in diabetic mice of the db/db group, including DEGs enriched in the PPAR signaling pathway and increased short-chain carboxylic acids (CAs), when compared with the normal db/m group. According to metagenomics, the gut microbiota of mice in the db/db group were disrupted, and particularly Lachnospiraceae bacteria and Oscillospiraceae bacteria significantly decreased. Also, according to the Pearson correlation analysis, a significant positive correlation was found between CAs and PPAR signaling pathway-related DEGs, and a negative correlation was found between CAs and the abundance of the above-mentioned species. To sum up, type 2 diabetes mellitus (T2DM) can upregulate the expression of partial cardiac genes through the levels of serum short-chain CAs affected by gut microbiota, thus playing a role in the occurrence and development of diabetic cardiomyopathy (DCM).<br><br>IMPORTANCE: Our research results clearly link the changes in heart genes of T2DM and normal mice with changes in serum metabolites and gut microbiota, indicating that some genes in biological processes are closely related to the reduction of protective microbiota in the gut microbiota. This study provides a theoretical basis for investigating the mechanism of DCM and may provide preliminary evidence for the future use of gut microbiota therapy for DCM.}, }
@article {pmid39611142, year = {2024}, author = {Zhang, L and Zhang, H and Su, S and Jia, Y and Liang, C and Fang, Y and Hong, D and Li, T and Ma, F}, title = {Risk factor assessment and microbiome analysis in peritoneal dialysis-related peritonitis reveal etiological characteristics.}, journal = {Frontiers in immunology}, volume = {15}, number = {}, pages = {1443468}, pmid = {39611142}, issn = {1664-3224}, mesh = {Humans ; *Peritonitis/microbiology/etiology/diagnosis ; *Peritoneal Dialysis/adverse effects ; Male ; Female ; Middle Aged ; Risk Factors ; *Gastrointestinal Microbiome ; Aged ; Risk Assessment ; Adult ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing ; }, abstract = {BACKGROUND: Peritoneal dialysis-related peritonitis (PDRP) is one of the most common complications of peritoneal dialysis (PD). Understanding the risk factors and etiological characteristics is indispensable for infection prevention and improving the outcome and life quality.<br><br>METHODS: A total of 70 PD patients were separated into the PDRP group (n=25) and the control group (n=45). Variables, including gender, age, body mass index, primary diseases, and history of basic diseases, in the two groups were analyzed to assess the risk factors of PDRP. Metagenomic next-generation sequencing (mNGS) and microbial culture were compared in detecting pathogenic microorganisms. Gut microbiota analysis was performed in 35 PDRP patients based on mNGS data.<br><br>RESULTS: Dialysis time and times of dialysate change were the risk factors of PDRP, and times of dialysate change was the independent risk factor of PDRP (p = 0.046). mNGS produced higher sensitivity (65.79%) than microbial culture (36.84%) in identifying pathogenic microorganisms. Staphylococcus aureus and Klebsiella pneumoniae (four cases) were the most frequent pathogens causing PDRP, followed by Staphylococcus capitis (three cases). &#x3b2; diversity of the gut microbiota was significantly different between patients with fewer times of dialysate change (&#x2264;4) and more (>5), as well as between patients with gram-positive (G+) bacterial and gram-negative (G-) bacterial infection.<br><br>CONCLUSION: The dialysis time and times of dialysate changes not only are risk factors for peritonitis in PD patients but also stimulate significant changes in the gut microbiome structure in PDRP patients. These findings may provide a novel viewpoint for the management of patients with PDRP.}, }
@article {pmid39611041, year = {2024}, author = {Liu, L and Lian, ZH and Lv, AP and Salam, N and Zhang, JC and Li, MM and Sun, WM and Tan, S and Luo, ZH and Gao, L and Yuan, Y and Ming, YZ and OuYang, YT and Li, YX and Liu, ZT and Hu, CJ and Chen, Y and Hua, ZS and Shu, WS and Hedlund, BP and Li, WJ and Jiao, JY}, title = {Insights into chemoautotrophic traits of a prevalent bacterial phylum CSP1-3, herein Sysuimicrobiota.}, journal = {National science review}, volume = {11}, number = {11}, pages = {nwae378}, pmid = {39611041}, issn = {2053-714X}, abstract = {Candidate bacterial phylum CSP1-3 has not been cultivated and is poorly understood. Here, we analyzed 112 CSP1-3 metagenome-assembled genomes and showed they are likely facultative anaerobes, with 3 of 5 families encoding autotrophy through the reductive glycine pathway (RGP), Wood-Ljungdahl pathway (WLP) or Calvin-Benson-Bassham (CBB), with hydrogen or sulfide as electron donors. Chemoautotrophic enrichments from hot spring sediments and fluorescence in situ hybridization revealed enrichment of six CSP1-3 genera, and both transcribed genes and DNA-stable isotope probing were consistent with proposed chemoautotrophic metabolisms. Ancestral state reconstructions showed that the ancestors of phylum CSP1-3 may have been acetogens that were autotrophic via the RGP, whereas the WLP and CBB were acquired by horizontal gene transfer. Our results reveal that CSP1-3 is a widely distributed phylum with the potential to contribute to the cycling of carbon, sulfur and nitrogen. The name Sysuimicrobiota phy. nov. is proposed.}, }
@article {pmid39609882, year = {2024}, author = {Cloarec, LA and Bacchetta, T and Bruto, M and Leboulanger, C and Grossi, V and Brochier-Armanet, C and Flandrois, JP and Zurmely, A and Bernard, C and Troussellier, M and Agogué, H and Ader, M and Oger-Desfeux, C and Oger, PM and Vigneron, A and Hugoni, M}, title = {Lineage-dependent partitioning of activities in chemoclines defines Woesearchaeota ecotypes in an extreme aquatic ecosystem.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {249}, pmid = {39609882}, issn = {2049-2618}, mesh = {*Archaea/classification/genetics/metabolism ; *Lakes/microbiology ; *Phylogeny ; *Ecotype ; Ecosystem ; Metagenomics ; Microbiota ; Genome, Archaeal ; Water Microbiology ; Biodiversity ; }, abstract = {BACKGROUND: DPANN archaea, including Woesearchaeota, encompass a large fraction of the archaeal diversity, yet their genomic diversity, lifestyle, and role in natural microbiomes remain elusive. With an archaeal assemblage naturally enriched in Woesearchaeota and steep vertical geochemical gradients, Lake Dziani Dzaha (Mayotte) provides an ideal model to decipher their in-situ activity and ecology.<br><br>RESULTS: Using genome-resolved metagenomics and phylogenomics, we identified highly diversified Woesearchaeota populations and defined novel halophilic clades. Depth distribution of these populations in the water column showed an unusual double peak of abundance, located at two distinct chemoclines that are hotspots of microbial diversity in the water column. Genome-centric metatranscriptomics confirmed this vertical distribution and revealed a fermentative activity, with acetate and lactate as end products, and active cell-to-cell processes, supporting strong interactions with other community members at chemoclines. Our results also revealed distinct Woesearchaeota ecotypes, with different transcriptional patterns, contrasted lifestyles, and ecological strategies, depending on environmental/host conditions.<br><br>CONCLUSIONS: This work provides novel insights into Woesearchaeota in situ activity and metabolism, revealing invariant, bimodal, and adaptative lifestyles among halophilic Woesearchaeota. This challenges our precepts of an invariable host-dependent metabolism for all the members of this taxa and revises our understanding of their contributions to ecosystem functioning and microbiome assemblage. Video Abstract.}, }
@article {pmid39609616, year = {2024}, author = {Kim, M and Parrish, RC and Tisza, MJ and Shah, VS and Tran, T and Ross, M and Cormier, J and Baig, A and Huang, CY and Brenner, L and Neuringer, I and Whiteson, K and Harris, JK and Willis, AD and Lai, PS}, title = {Host DNA depletion on frozen human respiratory samples enables successful metagenomic sequencing for microbiome studies.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1590}, pmid = {39609616}, issn = {2399-3642}, support = {R01 AI144119/AI/NIAID NIH HHS/United States ; R21 AI175965/AI/NIAID NIH HHS/United States ; R35 GM133420/GM/NIGMS NIH HHS/United States ; T32 HL116275/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; *Metagenomics/methods ; *Microbiota/genetics ; *Sputum/microbiology ; *Cystic Fibrosis/microbiology ; Bronchoalveolar Lavage Fluid/microbiology ; Freezing ; Adult ; Cryopreservation ; Female ; High-Throughput Nucleotide Sequencing/methods ; Bacteria/genetics/isolation &amp; purification/classification ; Sequence Analysis, DNA/methods ; Male ; Respiratory System/microbiology ; }, abstract = {Most respiratory microbiome studies use amplicon sequencing due to high host DNA. Metagenomics sequencing offers finer taxonomic resolution, phage assessment, and functional characterization. We evaluated five host DNA depletion methods on frozen nasal swabs from healthy adults, sputum from people with cystic fibrosis (pwCF), and bronchoalveolar lavage (BAL) from critically ill patients. Median sequencing depth was 76.4 million reads per sample. Untreated nasal, sputum, and BAL had 94.1%, 99.2%, and 99.7% host reads, respectively. Host depletion effects varied by sample type, generally increasing microbial reads, species and functional richness; this was mediated by higher effective sequencing depth. Rarefaction curves showed species richness saturation at 0.5-2 million microbial reads. Most methods did not change Morisita-Horn dissimilarity for BAL and nasal samples although the proportion of gram-negative bacteria decreased for sputum from pwCF. Freezing did not affect the viability of Staphylococcus aureus but reduced the viability of Pseudomonas aeruginosa and Enterobacter spp.; this was mitigated by adding a cryoprotectant. QIAamp-based host depletion minimally impacted gram-negative viability even in non-cryoprotected frozen isolates. While some host depletion methods may shift microbial composition, metagenomics sequencing without host depletion severely underestimates microbial diversity of respiratory samples due to shallow effective sequencing depth and is not recommended.}, }
@article {pmid39608999, year = {2024}, author = {Climacosa, FMM and Anlacan, VMM and Gordovez, FJA and Reyes, JCB and Tabios, IKB and Manalo, RVM and Cruz, JMC and Asis, JLB and Razal, RB and Abaca, MJM and Dacasin, AB and Espiritu, APN and Gapaz, NCLL and Lee Yu, MHL}, title = {Monitoring drug Efficacy through Multi-Omics Research initiative in Alzheimer's Disease (MEMORI-AD): A protocol for a multisite exploratory prospective cohort study on the drug response-related clinical, genetic, microbial and metabolomic signatures in Filipino patients with Alzheimer's disease.}, journal = {BMJ open}, volume = {14}, number = {11}, pages = {e078660}, pmid = {39608999}, issn = {2044-6055}, mesh = {Humans ; *Alzheimer Disease/drug therapy/genetics ; Philippines ; Prospective Studies ; Aged ; Cholinesterase Inhibitors/therapeutic use ; Rivastigmine/therapeutic use ; Donepezil/therapeutic use ; Cross-Sectional Studies ; Memantine/therapeutic use ; Male ; Female ; Metabolomics ; Gastrointestinal Microbiome/drug effects ; Multiomics ; }, abstract = {INTRODUCTION: Dementia is one of the leading causes of disability among older people aged 60 years and above, with majority eventually being diagnosed with Alzheimer's disease (AD). Pharmacological agents approved for dementia include acetylcholinesterase enzyme (AChE) inhibitors like rivastigmine, donepezil and galantamine and the N-methyl-D-aspartate (NMDA) receptor antagonist memantine, prescribed as monotherapy or in combination with each other, depending on the severity of disease. There is currently no available study demonstrating the clinical response to these drugs for AD in the Filipino population. Hence, this protocol aims to characterise the clinical, genetic, microbial and metabolic factors associated with drug responses to donepezil, rivastigmine and/or memantine for AD in a cohort of Filipinos with late-onset AD.<br><br>METHODS AND ANALYSIS: This protocol involves a multisite descriptive study that will use two study designs: (1) a descriptive, cross-sectional study to characterise the clinical profile of Filipino dementia patients with AD and (2) an exploratory prospective cohort study to investigate drug response-related genetic, gut microbiome and metabolome signatures of a subset of the recruited AD patients. At least 153 patients with mild or moderate AD aged 65 years old and above will be recruited regardless of their treatment status. A subset of these patients (n=60) who meet inclusion and exclusion criteria will be included further in the exploratory cohort study. These patients will be grouped according to their baseline medications and will be observed for treatment response in 6 months. The cognitive, functional and behavioural domains of patients and levels of functioning will be measured using different assessment tools. Drug responses of Filipino patients will then be investigated employing multi-omics technology to characterise genetic variations via whole exome sequencing, gut microbiome profile via shotgun metagenomic sequencing and metabolome profile via liquid chromatography with mass spectrometry.<br><br>ETHICS AND DISSEMINATION: The study has received ethical clearance from the Department of Health Single Joint Research Ethics Board (SJREB-2022-15). Results of psychometric scales will be made available to enrolled patients. The study results will be presented at national/international conferences and published in international peer-reviewed scientific journals, and summaries of the results will be provided to the study funders and institutional review boards of the three tertiary referral hospitals.<br><br>TRIAL REGISTRATION NUMBER: Philippine Health Research Registry ID PHRR230220-0054116; ClinicalTrials.gov ID NCT05801380.}, }
@article {pmid39608199, year = {2025}, author = {Bhat, AH and Malik, IM and Tak, H and Ganai, BA and Bharti, P}, title = {Host, parasite, and microbiome interaction: Trichuris ovis and its effect on sheep gut microbiota.}, journal = {Veterinary parasitology}, volume = {333}, number = {}, pages = {110356}, doi = {10.1016/j.vetpar.2024.110356}, pmid = {39608199}, issn = {1873-2550}, mesh = {Animals ; Sheep ; *Sheep Diseases/parasitology/microbiology ; *Gastrointestinal Microbiome ; *Trichuris ; *Host-Parasite Interactions ; *Trichuriasis/veterinary/parasitology/microbiology ; RNA, Ribosomal, 16S/genetics ; Cecum/microbiology/parasitology ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Sheep that are infected with gastrointestinal helminths experience a significant impact on their health and productivity. Among the helminths, nematodes like Haemonchus contortus, Oesophagostomum spp., Bunostomum trigonocephalum, Nematodirus battus, Trichostrongylus spp. and Teladorsagia circumcincta are particularly pathogenic. Understanding the interactions among parasites, hosts, and their microbiomes is crucial in developing new approaches in the management of parasites. This study examines the bacterial profile of Trichuris ovis, a highly prevalent nematode among Kashmir Merino sheep, and the influence of nematode infection on the caecal microbiome of its host. Sheep were selected based on T. ovis infection status, and samples were collected from infected and non-infected caecum. The 16S rRNA metagenomic analysis revealed distinct microbial communities in T. ovis, infected caecum, and non-infected caecum. Proteobacteria dominated the T. ovis microbiome, while infected caecum was rich in Bacteroidota and Spirochaetota, and non-infected caecum had a higher proportion of Firmicutes and Verrucomicrobiota. At the genus level, T. ovis was predominantly associated with Escherichia/Shigella, while infected caecum had higher proportions of Bacteroides, Prevotella, and Treponema. Non-infected caecum was characterized by WCHB1-41, Prevotella, and Succiniclasticum like genera. Alpha and beta diversity indicated significant differences in microbiome among the groups, with higher diversity observed in infected caecum. The study found T. ovis infection significantly alters the caecal microbiome of sheep, introducing potentially pathogenic bacteria and reducing beneficial ones. These findings underscore the complex relationship between host, parasite, and microbiome, highlighting the need for comprehensive strategies to manage helminth infections and their broader ecological impacts.}, }
@article {pmid39607975, year = {2024}, author = {Abbasi, AM and Nasir, S and Bajwa, AA and Akbar, H and Ali, MM and Rashid, MI}, title = {A comparative study of the microbiomes of the ticks Rhipicephalus microplus and Hyalomma anatolicum.}, journal = {Parasite (Paris, France)}, volume = {31}, number = {}, pages = {74}, pmid = {39607975}, issn = {1776-1042}, support = {HEC-GCF-273//Higher Education Commission, Pakistan/ ; }, mesh = {Animals ; *Rhipicephalus/microbiology ; *RNA, Ribosomal, 16S/genetics ; *Ixodidae/microbiology ; *Microbiota ; Pakistan ; Phylogeny ; Symbiosis ; Female ; Gastrointestinal Microbiome ; Coxiella/genetics/isolation &amp; purification/classification ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Hyalomma anatolicum and Rhipicephalus microplus are tick species that are important vectors of numerous pathogens affecting both humans and livestock. Endosymbionts, such as Coxiella-like endosymbionts (CLE), Francisella-like endosymbionts (FLE), and Candidatus Midichloria, play a crucial role in the physiology and vector competence of these ticks. In this study, we investigated the microbial composition of H. anatolicum and R. microplus from four geographically distinct regions of Pakistan to assess whether environmental differences influence their microbiomes. We analyzed the ticks' gut microbiome targeting the V3-V4 hypervariable region of 16S rRNA for Illumina 16S metagenome NGS sequencing and processed overall 144 ticks. Analysis of gut bacterial composition resulted in observation of 1200 R. microplus and 968 H. anatolicum unique amplicon sequencing variants (ASVs). Relative abundance, Alpha diversity (Shannon, Faith's phylogenetic distance) and beta diversity metrics (Bray-Curtis, Jaccard and UniFrac) were analyzed and revealed that H. anatolicum ticks have significantly unique and diverse microbial communities with Acinetobacter indicus and Francisella-like endosymbionts dominating as opposed to Candidatus Midichloria. Rhipicephalus microplus exhibited results consistent with the previous studies with no major changes in microbiome including Coxiella-like endosymbionts as the major contributor. These findings suggest that geographical and environmental factors play a significant role in shaping the tick microbiome, with potential consequences for disease transmission and tick survivability. Further research is needed to elucidate the functional roles of these microbial shifts and their impact on public health and livestock in affected regions.}, }
@article {pmid39604824, year = {2024}, author = {Li, X and Zhang, Z and Bai, H and Liu, Z}, title = {Analysis of vaginal microbiota during postpartum and postmenopausal periods based on metagenomics.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {501}, pmid = {39604824}, issn = {1471-2180}, mesh = {Humans ; Female ; *Vagina/microbiology ; *Postmenopause ; *Postpartum Period ; *Microbiota/genetics ; *Metagenomics/methods ; *Bacteria/genetics/classification/isolation &amp; purification ; Adult ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Postmenopausal and the postpartum periods are essential physiological phases that result in low estrogen levels in women; however, they are important to female reproductive health. Traditional as well as new detection methods (such as 16 S RNA sequencing) have limitations in detecting the composition of vaginal microbiota. Therefore, in this study, we used metagenomic detection technology to study the composition of vaginal microbiota in postmenopausal and postpartum women. Six women were randomly selected from each group (healthy women of childbearing age, postmenopausal group, and postpartum) for vaginal microecology, composition, α-diversity, linear discriminant analysis effect size (LEfSe), and Comprehensive Antibiotic Resistance Database (CARD) analyses.<br><br>RESULTS: We discovered that Lactobacillus dominance disappeared in postpartum and postmenopausal group women and that diversity increased. However, the proportions of Atopobium vaginae, Escherichia coli, and Streptococcus agalactiae significantly increased. Diversity was the highest in the postpartum period, with a significant increase in the proportions of A. vaginae, Gardnerella vaginalis, Prevotella, and occasionally, Chlamydia trachomatis. Linear discriminant analysis effect size analysis revealed that Lactobacillus crispatus and L. iners enrichment in the postpartum and menopausal periods was much lower than that in the childbearing age group. CARD analysis revealed that ABC-F ATP-binding cassette ribosomal protection protein subfamily gene abundance was significantly lower in the menopausal than in the childbearing age group, whereas the gimA family macrolide glycosyltransferase gene abundance was significantly higher.<br><br>CONCLUSIONS: The dominance of vaginal Lactobacillus in postpartum and menopausal women disappeared, while their diversity increased. In addition, the reproductive tract of postpartum women was susceptible to invasion by pathogenic microorganisms, which deserves clinical attention. When menopausal women receive treatment for vaginal infections, the likelihood that certain bacterial communities develop antibiotic resistance through ribosomal protection mechanisms is lower than that of women in the childbearing age, while the possibility of developing resistance to macrolides through glycosylation may increase. This, however, requires further research.}, }
@article {pmid39604809, year = {2025}, author = {Li, Q and Wu, D and Song, Y and Zhang, L and Wang, T and Chen, X and Zhang, M}, title = {In vivo mechanism of the interaction between trimethylamine lyase expression and glycolytic pathways.}, journal = {Food &amp; function}, volume = {16}, number = {1}, pages = {87-101}, doi = {10.1039/d4fo03809f}, pmid = {39604809}, issn = {2042-650X}, mesh = {Animals ; *Glycolysis ; Mice ; *Gastrointestinal Microbiome ; Male ; Glycine/metabolism/pharmacology ; Mice, Inbred C57BL ; Lyases/metabolism/genetics ; Methylamines/metabolism ; Diet ; Bacteria/genetics/classification/metabolism ; RNA, Ribosomal, 16S/genetics ; Choline/metabolism ; }, abstract = {Recent studies confirmed that host-gut microbiota interactions modulate disease-linked metabolite TMA production via TMA lyase. However, microbial enzyme production mechanisms remain unclear. In the present study, we investigated the impact of dietary and intervention factors on gut microbiota, microbial gene expression, and the interplay between TMA lyase and glycolytic pathways in mice. Using 16S rRNA gene sequencing, metagenomics, and metabolomics, the gut microbiota composition and microbial functional gene expression profiles related to TMA lyase and glycolytic enzymes were determined. The results revealed that distinct diets and intervention factors altered gut microbiota, gene expression, and metabolites linked to glycine metabolism and glycolysis. Notably, an arabinoxylan-rich diet suppressed genes linked to choline, glycine, glycolysis, and TMA lyase, favoring glycine utilization via pyruvate pathways. Glycolytic inhibitors amplified these effects, mainly inhibiting pyruvate kinase. Our findings underscored the crosstalk between TMA lyase and glycolytic pathways, regulating glycine levels, and suggested avenues for targeted interventions and personalized diets to curb choline TMA lyase production.}, }
@article {pmid39604726, year = {2025}, author = {Chen-Liaw, A and Aggarwala, V and Mogno, I and Haifer, C and Li, Z and Eggers, J and Helmus, D and Hart, A and Wehkamp, J and Lamousé-Smith, ESN and Kerby, RL and Rey, FE and Colombel, JF and Kamm, MA and Olle, B and Norman, JM and Menon, R and Watson, AR and Crossette, E and Terveer, EM and Keller, JJ and Borody, TJ and Grinspan, A and Paramsothy, S and Kaakoush, NO and Dubinsky, MC and Faith, JJ}, title = {Gut microbiota strain richness is species specific and affects engraftment.}, journal = {Nature}, volume = {637}, number = {8045}, pages = {422-429}, pmid = {39604726}, issn = {1476-4687}, support = {R01 DK112978/DK/NIDDK NIH HHS/United States ; R01 DK124133/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; Humans ; Mice ; Bacteria/classification/genetics/isolation &amp; purification ; Biodiversity ; *Fecal Microbiota Transplantation ; *Feces/microbiology ; *Gastrointestinal Microbiome ; Lakes/microbiology ; Metagenome ; Soil Microbiology ; *Species Specificity ; }, abstract = {Despite the fundamental role of bacterial strain variation in gut microbiota function[1-6], the number of unique strains of a species that can stably colonize the human intestine is still unknown for almost all species. Here we determine the strain richness (SR) of common gut species using thousands of sequenced bacterial isolates with paired metagenomes. We show that SR varies across species, is transferable by faecal microbiota transplantation, and is uniquely low in the gut compared with soil and lake environments. Active therapeutic administration of supraphysiologic numbers of strains per species increases recipient SR, which then converges back to the population average after dosing is ceased. Stratifying engraftment outcomes by high or low SR shows that SR predicts microbial addition or replacement in faecal transplants. Together, these results indicate that properties of the gut ecosystem govern the number of strains of each species colonizing the gut and thereby influence strain addition and replacement in faecal microbiota transplantation and defined live biotherapeutic products.}, }
@article {pmid39604579, year = {2025}, author = {Hao, Z and Lu, Y and Hao, Y and Luo, Y and Wu, K and Zhu, C and Shi, P and Zhu, F and Lin, Y and Zeng, X}, title = {Fungal mycobiome dysbiosis in choledocholithiasis concurrent with cholangitis.}, journal = {Journal of gastroenterology}, volume = {60}, number = {3}, pages = {340-355}, pmid = {39604579}, issn = {1435-5922}, support = {PWZxq2022-06//Key Disciplines Group Construction Project of Shanghai Pudong New Area Health Commission/ ; 82270636//National Natural Science Foundation of China/ ; 82070616//National Natural Science Foundation of China/ ; 82100608//National Natural Science Foundation of China/ ; PW2022D08//Joint Tackling Project of Pudong Health Committee of Shanghai/ ; PW2021A-38//Health and Family Planning Research Project of Pudong Health Committee of Shanghai/ ; PWYgf2021-02//Medical Discipline Construction Project of Pudong Health Committee of Shanghai/ ; 2022XD028//Talent Plan of the Shanghai Municipal Health Commission for Academic Leader/ ; }, mesh = {Humans ; *Dysbiosis/microbiology ; Male ; Female ; Middle Aged ; Retrospective Studies ; *Mycobiome ; Case-Control Studies ; *Cholangitis/microbiology/complications ; *Gastrointestinal Microbiome ; *Choledocholithiasis/microbiology/complications ; Aged ; *Fungi/isolation &amp; purification/classification ; Adult ; Chromatography, Liquid ; }, abstract = {BACKGROUND: The gut mycobiome might have an important influence on the pathogenesis of choledocholithiasis concurrent with cholangitis (CC). The aim of this study was to characterize the fungal mycobiome profiles, explore the correlation and equilibrium of gut interkingdom network among bacteria-fungi-metabolites triangle in CCs.<br><br>METHODS: In a retrospective case-control study, we recruited patients with CC (n&#x2009;=&#x2009;25) and healthy controls (HCs) (n&#x2009;=&#x2009;25) respectively to analyze the gut fungal dysbiosis. Metagenomic sequencing was employed to characterize the gut mycobiome profiles, and liquid chromatography/mass spectrometry (LC/MS) analysis was used to quantify the metabolites composition.<br><br>RESULTS: The Shannon index displayed a reduction in fungal &#x3b1;-diversity in CCs compared to HCs (p&#x2009;=&#x2009;0.041), and the overall fungal composition differed significantly between two groups. The dominant 7 fungi species with the remarkable altered abundance were identified (LDA score&#x2009;>&#x2009;3.0, p&#x2009;<&#x2009;0.05), including CC-enriched Aspergillus_niger and CC-depleted fungi Saccharomyces_boulardii. In addition, the correlations between CC-related fungi and clinical variables in CCs were analyzed. Moreover, the increased abundance ratio of Basidiomycota-to-Ascomycota and a dense linkage of bacteria-fungi interkingdom network in CCs were demonstrated. Finally, we identified 30 markedly&#xa0;altered metabolites in CCs (VIP&#x2009;>&#x2009;1.0 and p&#x2009;<&#x2009;0.05), including low level of acetate and butyrate, and the deeper understanding on the complexity of bacteria-fungi-metabolites triangle involving bile inflammation was verified.<br><br>CONCLUSION: Our investigation demonstrated a distinct gut fungal dysbiosis in CCs and proposed that, beyond bacteria, the more attention should be paid to significantly potential influence of fungi and bacteria-fungi-metabolites triangle interkingdom interactions on pathogenesis of CC.}, }
@article {pmid39604394, year = {2024}, author = {Akiyama, S and Nishijima, S and Kojima, Y and Kimura, M and Ohsugi, M and Ueki, K and Mizokami, M and Hattori, M and Tsuchiya, K and Uemura, N and Kawai, T and Bork, P and Nagata, N}, title = {Multi-biome analysis identifies distinct gut microbial signatures and their crosstalk in ulcerative colitis and Crohn's disease.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {10291}, pmid = {39604394}, issn = {2041-1723}, mesh = {Humans ; *Colitis, Ulcerative/microbiology/genetics/virology ; *Crohn Disease/microbiology ; *Gastrointestinal Microbiome/genetics ; *Feces/microbiology ; Male ; *Metagenomics/methods ; Female ; *Bacteriophages/genetics ; Adult ; Escherichia coli/genetics/metabolism ; Middle Aged ; Japan ; Fungi/genetics ; Bacteria/genetics/metabolism/classification ; Metagenome/genetics ; Saccharomyces cerevisiae/genetics ; Bifidobacterium/genetics ; Virome/genetics ; Enterococcus faecium/genetics/pathogenicity ; Fatty Acids, Volatile/metabolism ; Young Adult ; China ; Case-Control Studies ; }, abstract = {The integrative multi-kingdom interaction of the gut microbiome in ulcerative colitis (UC) and Crohn's disease (CD) remains underinvestigated. Here, we perform shotgun metagenomic sequencing of feces from patients with UC and CD, and healthy controls in the Japanese 4D cohort, profiling bacterial taxa, gene functions, and antibacterial genes, bacteriophages, and fungi. External metagenomic datasets from the US, Spain, the Netherlands, and China were analyzed to validate our multi-biome findings. We found that Enterococcus faecium and Bifidobacterium spp. were enriched in both diseases. Enriched Escherichia coli was characteristic of CD and was linked to numerous antibiotic resistance genes involved in efflux pumps and adherent-invasive Escherichia coli virulence factors. Virome changes correlated with shifts in the bacteriome, including increased abundances of phages encoding pathogenic genes. Saccharomyces paradoxus and Saccharomyces cerevisiae were enriched in UC and CD, respectively. Saccharomyces cerevisiae and Escherichia coli had negative associations with short-chain fatty acid (SCFA)-producing bacteria in CD. Multi-biome signatures and their interactions in UC and CD showed high similarities between Japan and other countries. Since bacteria, phages, and fungi formed multiple hubs of intra- or trans-kingdom networks with SCFA producers and pathobionts in UC and CD, an approach targeting the interaction network may hold therapeutic promise.}, }
@article {pmid39603713, year = {2024}, author = {Helfrich, PG and Feldman, J and Andrade-Barahona, E and Robertson, I and Foster, J and Hofacker, R and Dahlquist Selking, G and Sheik, CS and Cox, A}, title = {Aqueous copper geochemistry shapes the sediment microbial resistome in a recovering stream.}, journal = {Environmental microbiology reports}, volume = {16}, number = {6}, pages = {e70045}, pmid = {39603713}, issn = {1758-2229}, support = {800015-10297//Montana Department of Justice, Natural Resource Damage Program (NRDP) through the Butte Natural Resource Damage Restoration Council (BNRC)/ ; //Montana Tech Faculty Seed and Faculty Development Initiatives/ ; //Montana Tech Earth Science and Engineering Fellowship/ ; //Montana Water Center, Faculty Seed Grant/ ; }, mesh = {*Copper/metabolism ; *Geologic Sediments/microbiology/chemistry ; *Rivers/microbiology/chemistry ; *Bacteria/genetics/drug effects/classification/metabolism/isolation &amp; purification ; Metagenome ; Water Pollutants, Chemical/metabolism ; Metagenomics ; Arsenic/metabolism ; Microbiota/genetics/drug effects ; }, abstract = {Aqueous metals are pervasive contaminants associated with historical mining. We produced and examined 16 metagenomes from a contaminated creek to investigate how anthropogenic metal contamination shapes the functional profiles of microbial communities. We then incorporated the metagenomic profiles and concurrently collected geochemical context into a multivariate model to examine correlations between stream geochemistry and microbial functional potential. Integrating the metagenomes with full geochemical profiles emphasised that even low metalloid concentrations shaped microbial functionality, seasonal shifts in copper bioavailability and arsenic exposure correlated with genetic variation, and copper resistomes were spatiotemporally distinct. This study provides new insights into microbial metabolic potential and microbe-metal(loid) interactions.}, }
@article {pmid39603473, year = {2025}, author = {Li, Y and Tao, C and Li, S and Chen, W and Fu, D and Jafvert, CT and Zhu, T}, title = {Feasibility study of machine learning to explore relationships between antimicrobial resistance and microbial community structure in global wastewater treatment plant sludges.}, journal = {Bioresource technology}, volume = {417}, number = {}, pages = {131878}, doi = {10.1016/j.biortech.2024.131878}, pmid = {39603473}, issn = {1873-2976}, mesh = {*Machine Learning ; *Sewage/microbiology ; *Wastewater/microbiology ; Water Purification/methods ; Feasibility Studies ; Bacteria/drug effects/genetics ; Drug Resistance, Microbial/genetics ; Microbiota/drug effects ; China ; Drug Resistance, Bacterial/genetics ; }, abstract = {Wastewater sludges (WSs) are major reservoirs and emission sources of antibiotic resistance genes (ARGs) in cities. Identifying antimicrobial resistance (AMR) host bacteria in WSs is crucial for understanding AMR formation and mitigating biological and ecological risks. Here 24 sludge data from wastewater treatment plants in Jiangsu Province, China, and 1559 sludge data from genetic databases were analyzed to explore the relationship between 7 AMRs and bacterial distribution. The results of the Procrustes and Spearman correlation analysis were unsatisfactory, with p-value exceeding the threshold of 0.05 and no strong correlation (r > 0.8). In contrast, explainable machine learning (EML) using SHapley Additive exPlanation (SHAP) revealed Pseudomonadota as a major contributor (39.3 %-74.2 %) to sludge AMR. Overall, the application of ML is promising in analyzing AMR-bacteria relationships. Given the different applicable occasions and advantages of various analysis methods, using ML as one of the correlation analysis tools is strongly recommended.}, }
@article {pmid39602306, year = {2024}, author = {Pasolli, E and Mauriello, IE and Avagliano, M and Cavaliere, S and De Filippis, F and Ercolini, D}, title = {Bifidobacteriaceae diversity in the human microbiome from a large-scale genome-wide analysis.}, journal = {Cell reports}, volume = {43}, number = {12}, pages = {115027}, doi = {10.1016/j.celrep.2024.115027}, pmid = {39602306}, issn = {2211-1247}, mesh = {Humans ; *Phylogeny ; *Microbiota/genetics ; Metagenome ; Genome, Bacterial ; Genome-Wide Association Study ; Probiotics ; }, abstract = {We performed a large-scale genome-wide analysis aiming to investigate the prevalence and strain-level diversity of Bifidobacteriaceae species in the human microbiome. We considered 9,528 publicly available human metagenomes and integrated them with 1,192 isolate genomes from different sources. The prevalence and abundance of Bifidobacteriaceae species in humans was linked to multiple host characteristics: they were reduced in older people and enriched in populations characterized by Westernized lifestyles with geography-specific patterns. Phylogenetic analysis highlighted 110 Bifidobacteriaceae species-level genome bins (SGBs), with 32 found in humans and 8 in food and probiotic sources. Functional annotation revealed a great diversity in carbohydrate-active enzyme families across these SGBs. We found potential subspecies for most of the SGBs prevalent in humans and identified patterns driven by age and geography. We provided evidence that strains used in probiotics were rarely identified in humans, with the only exception represented by Bifidobacterium animalis. We finally evaluated that the abundance of Bifidobacteriaceae species exhibited moderate and variable capabilities to predict health status in case-control studies.}, }
@article {pmid39601988, year = {2024}, author = {Rekadwad, BN and Shouche, YS and Jangid, K}, title = {Oil spill pollution and diversity analyses of resistant bacteria isolated from soil across the Arabian Sea and Bay of Bengal coastlines.}, journal = {Environmental monitoring and assessment}, volume = {196}, number = {12}, pages = {1265}, pmid = {39601988}, issn = {1573-2959}, mesh = {*Bacteria/classification/isolation &amp; purification/genetics ; *Petroleum Pollution ; *Environmental Monitoring ; India ; *Soil Microbiology ; Biodiversity ; Bays/microbiology ; Drug Resistance, Bacterial ; }, abstract = {Pelagic transport causes oil pollution via international tanker routes in the open ocean across southern Asia and the Indian Territory. Nutrient-rich runoff from residential, commercial, and industrial wastes, oil tanker mishaps, and sailing flags have all resulted in pollution. The natural flow of ocean water from east to west dragged pollutants into Indian Territory. We have investigated that the severe deposition of oil spills and biohazardous wastes is causing faunal mortality. Microbiome analyses helped us understand the sample's microbial load. 16S amplicon metagenome analysis, followed by enumeration and confirmation using molecular methods, indicates the presence of diverse microbial profiles. The presence of non-native hydrocarbon- and AMR-resistant bacterial taxa, such as Brevundimonas, Staphylococcus spp., Mycolicibacterium, Spingomonas spp., Bacillus spp., Chitinophaga spp., Priestia spp., Domibacillus spp., Rossellomorea spp., and Acinetobacter spp., confirms the impacts of oil and urban pollution. This indicates that the coastal soil of Goa and Andhra Pradesh has hydrocarbon- and antibiotic-resistant bacteria, which confirms that the present pollution status and that high-traffic recreational activities put biodiversity and humans at risk of getting illnesses linked to antibiotic resistance.}, }
@article {pmid39601556, year = {2024}, author = {Yang, J and Wang, H and Lin, X and Liu, J and Feng, Y and Bai, Y and Liang, H and Hu, T and Wu, Z and Lai, J and Liu, J and Zou, Y and Wei, S and Yan, P}, title = {Gut microbiota dysbiosis induced by alcohol exposure in pubertal and adult mice.}, journal = {mSystems}, volume = {9}, number = {12}, pages = {e0136624}, pmid = {39601556}, issn = {2379-5077}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Dysbiosis/chemically induced/microbiology ; Mice ; *Ethanol ; Male ; Mice, Inbred C57BL ; Metagenome/drug effects ; Liver/metabolism/drug effects/pathology ; Sexual Maturation/drug effects ; }, abstract = {UNLABELLED: Alcohol intake causes many diseases including neuropsychiatric symptoms, nutritional deficiency, progressive pancreatitis, liver cirrhosis, and ischemic heart disease. The gut microbiota changes significantly after alcohol exposure. Alcohol consumption tends to increase in underage and young people, but the feature of the gut microbiota in puberty remains largely unexplored. In this study, we conducted alcohol-exposed pubertal and adult mice model to investigate the intestinal damage and gut microbiota change. Interestingly, the responses of pubertal mice and adult mice after alcohol exposure were different. We found that alcohol dehydrogenase decreased and aldehyde dehydrogenase increased in the liver of pubertal mice, thus reducing the accumulation of toxic acetaldehyde. Furthermore, alcohol exposure caused less intestinal injury in pubertal mice. Through the analysis of metagenome assembly genome, we obtained many unrecognized bacterial genomes. Limosillactobacillus reuteri (cluster_56) and Lactobacillus intestinalis (cluster_57) were assembled from the samples of pubertal mice, which were involved in the production of indole acetic acid and the transformation of bile acids in response to alcohol exposure. This study provided a new insight to investigate the gut microbiota change and explained the difference of the gut microbiota after alcohol exposure between pubertal mice and adult mice.<br><br>IMPORTANCE: This study elucidates the significant impact of alcohol exposure on the gut microbiota and metabolic pathways in mice, highlighting the differential responses between adolescent and adult stages. Alcohol exposure was found to damage the intestinal barrier, alter the microbial composition by decreasing beneficial bacteria like Lactobacillus, and increase harmful bacteria such as Alistipes. The study also discovered unique microbial changes and resilience in pubertal mice. Species-level metagenomic analysis revealed specific microbial taxa and metabolic functions affected by alcohol. Metagenome-assembled genomes (MAGs) found many species that could not be annotated by conventional methods including many members of Lachnospiraceae, greatly expanding our understanding of the gut microbiota composition. These findings underscore the need for further research on alcohol's effects on various organs and the implications of microbial metabolites on disease progression.}, }
@article {pmid39601555, year = {2024}, author = {Gao, Y and Zhang, H and Zhu, D and Guo, L}, title = {Different artificial feeding strategies shape the diverse gut microbial communities and functions with the potential risk of pathogen transmission to captive Asian small-clawed otters (Aonyx cinereus).}, journal = {mSystems}, volume = {9}, number = {12}, pages = {e0095424}, pmid = {39601555}, issn = {2379-5077}, support = {561119219//Scientific research start-up foundation from Lanzhou University/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Otters/microbiology ; *Feces/microbiology ; *Animal Feed/analysis/microbiology ; Animals, Zoo/microbiology ; Diet/veterinary ; Bacteria/genetics/isolation &amp; purification/classification ; Fatty Acids, Volatile/metabolism ; }, abstract = {UNLABELLED: Captive otters raised in zoos are fed different artificial diets, which may shape gut microbiota. The objective is to evaluate the impacts of two different artificial diets on microbial communities and function capabilities and short-chain fatty acid (SCFA) profiles in healthy otters' feces. A total of 16 Asian small-clawed otters in two groups (n = 8) were selected. Group A otters were fed raw loaches supplemented with commercial cat food (LSCF) diet, and group B otters were fed raw crucian diet. The communities and functional capabilities of microbiota in feces were assessed with metagenomic sequencing. Captive otters fed two kinds of diets possessed different gut microbial communities and functional capabilities. Various pathogenic bacteria, like Escherichia coli and Clostridium perfringens, were enriched in the samples from the two groups, respectively. Most of the differential pathways of nutrient metabolism were significantly enriched in group A, and the distributions of carbohydrate enzymes in the two groups significantly differed from each other. Multiple resistance genes markedly accumulated in fecal samples of the group A otters with LSCF diet. Higher concentrations of SCFAs were also observed in group A otters. Two feeding strategies were both likely to facilitate the colonization and expansion of various pathogenic bacteria and the accumulation of resistance genes in the intestines of captive otters, suggesting that risk of pathogen transmission existed in the current feeding process. Commercial cat food could supplement various nutrients and provide a substrate for the production of SCFAs, which might be beneficial for the otters' intestinal fermentation and metabolism.<br><br>IMPORTANCE: Captive otters fed with different diets possessed distinct gut microbial communities and functions, with the enrichment of several pathogens and multiple resistance genes in their gut microbiota. The current artificial feeding strategies had the possibility to accelerate the colonization and proliferation of various pathogenic bacteria in the intestines of otters and the spread of resistance genes, increasing the risk of diseases. In addition, supplementation with commercial cat food had benefits for otters' intestinal fermentation and the metabolism of gut microbiota.}, }
@article {pmid39601293, year = {2024}, author = {Liu, L and Cao, S and Lin, W and Gao, Z and Yang, L and Zhu, L and Yang, B and Zhang, G and Zhu, R and Wu, D}, title = {miMatch: a microbial metabolic background matching tool for mitigating host confounding in metagenomics research.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2434029}, pmid = {39601293}, issn = {1949-0984}, mesh = {*Metagenomics/methods ; Humans ; Gastrointestinal Microbiome ; Software ; Case-Control Studies ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Metagenome ; Propensity Score ; }, abstract = {Metagenomic research faces a persistent challenge due to the low concordance across studies. While matching host confounders can mitigate the impact of individual differences, the influence of factors such as genetics, environment, and lifestyle habits on microbial profiles makes it exceptionally challenging to create fully matched cohorts. The microbial metabolic background, which modulates microbial composition, reflects a cumulative impact of host confounders, serving as an ideal baseline for microbial sample matching. In this study, we introduced miMatch, an innovative metagenomic sample-matching tool that uses microbial metabolic background as a comprehensive reference for host-related variables and employs propensity score matching to build case-control pairs, even in the absence of host confounders. In the simulated datasets, miMatch effectively eliminated individual metabolic background differences, thereby enhancing the accuracy of identifying differential microbial patterns and reducing false positives. Moreover, in real metagenomic data, miMatch improved result consistency and model generalizability across cohorts of the same disease. A user-friendly web server (https://www.biosino.org/iMAC/mimatch) has been established to promote the integration of multiple metagenomic cohorts, strengthening causal relationships in metagenomic research.}, }
@article {pmid39599783, year = {2024}, author = {Vila-Nistal, M and Logares, R and Gasol, JM and Martinez-Garcia, M}, title = {Time Series Data Provide Insights into the Evolution and Abundance of One of the Most Abundant Viruses in the Marine Virosphere: The Uncultured Pelagiphages vSAG 37-F6.}, journal = {Viruses}, volume = {16}, number = {11}, pages = {}, pmid = {39599783}, issn = {1999-4915}, support = {PID2021-125175OB-I00//Agencia Estatal de Investigaci&#xf3;n/ ; CTM2015-70340-R//Agencia Estatal de Investigaci&#xf3;n/ ; RTI2018-101025-B-I00//Agencia Estatal de Investigaci&#xf3;n/ ; }, mesh = {*Seawater/virology ; *Metagenomics/methods ; Genome, Viral ; Phylogeny ; Evolution, Molecular ; Aquatic Organisms/virology ; Virome/genetics ; }, abstract = {Viruses play a pivotal role in ecosystems by influencing biochemical cycles and impacting the structure and evolution of their host cells. The widespread pelagiphages infect Pelagibacter spp., the most abundant marine microbe on Earth, and thus play a significant role in carbon transformation through the viral shunt. Among these viruses, the uncultured lytic pelagiphage vSAG 37-F6, uncovered by single-virus genomics, is likely the most numerous virus in the ocean. While previous research has delved into the diversity and spatial distribution of vSAG 37-F6, there is still a gap in understanding its temporal dynamics, hindering our insight into its ecological impact. We explored the temporal dynamics of vSAG 37-F6, assessing periodic fluctuations in abundance and evolutionary patterns using long- and short-term data series. In the long-term series (7 years), metagenomics showed negative selection acting on all viral genes, with a highly conserved overall diversity over time composed of a pool of yearly emergent, highly similar novel strains that exhibited a seasonal abundance pattern with two peaks during winter and fall and a decrease in months with higher UV radiation. Most non-synonymous polymorphisms occurred in structural viral proteins located in regions with low conformational restrictions, suggesting that many of the viral genes of this population are highly purified over its evolution. At the fine-scale resolution (24 h time series), combining digital PCR and metagenomics, we identified two peaks of cellular infection for the targeted vSAG 37-F6 viral strain (up to approximately 10[3] copies/ng of prokaryotic DNA), one before sunrise and the second shortly after midday. Considering the high number of co-occurring strains of this microdiverse virus, the abundance values at the species or genus level could be orders of magnitudes higher. These findings represent a significant advancement in understanding the dynamics of the potentially most abundant oceanic virus, providing valuable insights into ecologically relevant marine viruses.}, }
@article {pmid39599719, year = {2024}, author = {Senaprom, S and Namjud, N and Ondee, T and Bumrungpert, A and Pongpirul, K}, title = {Sugar Composition of Thai Desserts and Their Impact on the Gut Microbiome in Healthy Volunteers: A Randomized Controlled Trial.}, journal = {Nutrients}, volume = {16}, number = {22}, pages = {}, pmid = {39599719}, issn = {2072-6643}, support = {FOODF67300006//Thailand Science Research and Innovation Fund Chulalongkorn University/ ; //The 90th Anniversary of Chulalongkorn University, Ratchadaphisek Somphot Fund/ ; //The Second Century Fund (C2F) for PhD Scholarship, Chulalongkorn University/ ; }, mesh = {Adolescent ; Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; Bacteria/classification/genetics ; *Dietary Sugars ; *Feces/microbiology ; *Gastrointestinal Microbiome ; Healthy Volunteers ; RNA, Ribosomal, 16S/genetics ; Thailand ; }, abstract = {BACKGROUND: The relationship between consuming Thai desserts-predominantly composed of carbohydrates-and gut microbiome profiles remains unclear. This study aimed to evaluate the effects of consuming various Thai desserts with different GI values on the gut microbiomes of healthy volunteers.<br><br>METHODS: This open-label, parallel randomized clinical trial involved 30 healthy individuals aged 18 to 45 years. Participants were randomly assigned to one of three groups: Phetchaburi's Custard Cake (192 g, low-GI group, n = 10), Saraburi's Curry Puff (98 g, medium-GI group, n = 10), and Lampang's Crispy Rice Cracker (68 g, high-GI group, n = 10), each consumed alongside their standard breakfast. Fecal samples were collected at baseline and 24 h post-intervention for metagenomic analysis of gut microbiome profiles using 16S rRNA gene sequencing.<br><br>RESULTS: After 24 h, distinct trends in the relative abundance of various gut microbiota were observed among the dessert groups. In the high-GI dessert group, the abundance of Collinsella and Bifidobacterium decreased compared to the low- and medium-GI groups, while Roseburia and Ruminococcus showed slight increases. Correlation analysis revealed a significant negative relationship between sugar intake and Lactobacillus abundance in the medium- and high-GI groups, but not in the low-GI group. Additionally, a moderately negative association was observed between Akkermansia abundance and sugar intake in the high-GI group. These bacteria are implicated in energy metabolism and insulin regulation. LEfSe analysis identified Porphyromonadaceae and Porphyromonas as core microbiota in the low-GI group, whereas Klebsiella was enriched in the high-GI group, with no predominant bacteria identified in the medium-GI group.<br><br>CONCLUSIONS: The findings suggest that Thai desserts with varying GI levels can influence specific gut bacteria, though these effects may be temporary.}, }
@article {pmid39598209, year = {2024}, author = {Al-Awthan, YS and Mir, R and Alharbi, BM and Alatawi, AS and Almutairi, FM and Khafaga, T and Shohdi, WM and Fakhry, AM and Alatawi, MM}, title = {Metagenomic Analysis of Sediment Bacterial Diversity and Composition in Natural Lakes and Artificial Waterpoints of Tabuk Region in King Salman Bin Abdulaziz Royal Natural Reserve, Saudi Arabia.}, journal = {Life (Basel, Switzerland)}, volume = {14}, number = {11}, pages = {}, pmid = {39598209}, issn = {2075-1729}, abstract = {The Tabuk region is located in the northern part of Saudi Arabia, and it has an area of 117,000 km[2] between longitudes 26° N and 29° N and latitudes 34° E and 38° E. King Salman Bin Abdulaziz Royal Natural Reserve (KSRNR) is the largest natural reserve in Saudi Arabia and covers about 130,700 km[2]. It represents a new tourist attraction area in the Tabuk region. Human activities around the lake may lead to changes in water quality, with subsequent changes in microenvironment components, including microbial diversity. The current study was designed to assess possible changes in bacterial communities of the water sediment at some natural lakes and artificial waterpoints of KSRNR. Water samples were collected from ten different locations within KSRNR: W1, W2, W3 (at the border of the royal reserve); W4, W5, W6, W7 (at the middle); and W8, W9, and W10 (artificial waterpoints). The total DNA of the samples was extracted and subjected to 16S rRNA sequencing and metagenomic analysis; also, the environmental parameters (temperature and humidity) were recorded for all locations. Metagenomic sequencing yielded a total of 24,696 operational taxonomic units (OTUs), which were subsequently annotated to 193 phyla, 215 classes, 445 orders, 947 families, and 3960 genera. At the phylum level, Pseudomonadota dominated the microbial communities across all samples. At the class level, Gammaproteobacteria, Clostridia, Alphaproteobacteria, Bacilli, and Betaproteobacteria were the most prevalent. The dominant families included Enterobacteriaceae, Pseudomonadaceae, Clostridiaceae, Comamonadaceae, and Moraxellaceae. At the genus level, Pseudomonas, Clostridium, Acinetobacter, Paenibacillus, and Acidovorax exhibited the highest relative abundances. The most abundant species were Hungatella xylanolytica, Pseudescherichia vulneris, Pseudorhizobium tarimense, Paenibacillus sp. Yn15, and Enterobacter sp. Sa187. The observed species richness revealed substantial heterogeneity across samples using species richness estimators, Chao1 and ACE, indicating particularly high diversity in samples W3, W5, and W6. Current study results help in recognizing the structure of bacterial communities at the Tubaiq area in relation to their surroundings for planning for environmental protection and future restoration of affected ecosystems. The findings highlight the dominance of various bacterial phyla, classes, families, and genera, with remarkable species richness in some areas. These results underscore the influence of human activities on microbial diversity, as well as the significance of monitoring and conserving the reserve's natural ecosystems.}, }
@article {pmid39597714, year = {2024}, author = {Yang, T and He, Y and Yang, M and Gao, Z and Zhou, J and Wang, Y}, title = {Community Structure and Biodiversity of Active Microbes in the Deep South China Sea.}, journal = {Microorganisms}, volume = {12}, number = {11}, pages = {}, pmid = {39597714}, issn = {2076-2607}, support = {42376149//National Natural Science Foundation of China/ ; }, abstract = {The deep ocean harbors a group of highly diversified microbes, while our understanding of the active microbes that are real contributors to the nutrient cycle remains limited. In this study, we report eukaryotic and prokaryotic communities in ~590 m and 1130 m depths using 16S and 18S rRNA Illumina reads (miTags) extracted from 15 metagenomes (MG) and 14 metatranscriptomes (MT). The metagenomic 16S miTags revealed the dominance of Gammaproteobacteria, Alphaproteobacteria, and Nitrososphaeria, while the metatranscriptomic 16S miTags were highly occupied by Gammaproteobacteria, Acidimicrobiia, and SAR324. The consistency of the active taxa between the two depths suggests the homogeneity of the functional microbial groups across the two depths. The eukaryotic microbial communities revealed by the 18S miTags of the metagenomic data are dominated by Polycystinea; however, they were almost all absent in the 18S metatranscriptomic miTags. The active eukaryotes were represented by the Arthropoda class (at 590 m depth), Dinophyceae, and Ciliophora classes. Consistent eukaryotic communities were also exhibited by the 18S miTags of the metatranscriptomic data of the two depths. In terms of biodiversity, the ACE and Shannon indices of the 590 m depth calculated using the 18S metatranscriptomic miTags were much higher than those of the 1130 m depth, while a reverse trend was shown for the indices based on the metagenomic data. Our study reports the active microbiomes functioning in the nutrient utilization and carbon cycle in the deep-sea zone, casting light on the quantification of the ecological processes occurring in the deep ocean.}, }
@article {pmid39597627, year = {2024}, author = {Vilo, C and Fábrega, F and Campos, VL and Gómez-Silva, B}, title = {Microbial Biodiversity in Sediment from the Amuyo Ponds: Three Andean Hydrothermal Lagoons in Northern Chile.}, journal = {Microorganisms}, volume = {12}, number = {11}, pages = {}, pmid = {39597627}, issn = {2076-2607}, support = {FB 0001//ANID, Chile/ ; }, abstract = {The Amuyo Ponds (APs) are a group of three brackish hydrothermal lagoons located at 3700 m above sea level in a pre-Andean setting in the Atacama Desert. Each pond shows a conspicuous green (GP), red (RP), or yellow (YP) coloration, and discharges water rich in arsenic and boron into the Caritaya River (Camarones Basin, northern Chile). Microorganisms are subjected to harsh environmental conditions in these ponds, and the microbial composition and diversity in the Amuyo Ponds' sediments are unknown. The microbial life colonizing AP sediments was explored by metagenomics analyses, showing a diverse microbial life dominated by members of the bacterial domain, with nearly 800 bacterial genome sequences, and sequences associated with Archaea, Eukarya, and viruses. The genus Pseudomonas was more abundant in GP and YP sediments, while the genera Pseudomonas, Aeromonas, and Shewanella were enriched in RP sediments. Archaeal composition was similar in all sediments, and enriched with methanogens sequences from the Archaeoglobi and Halobacteria classes. Abundant fungi sequences were detected in all sediments from the phyla Blastocladiomycota and Ascomycota. We also report putative functional capabilities related to virulence and defense genes, the biosynthesis of secondary metabolites, and tolerance to arsenic. Thirteen bacterial and fourteen viral metagenome-assembled genomes were reconstructed and informed here. This work expands our knowledge on the richness of the microorganisms in the APs and open further studies on the ecology and genomics of this striking Andean geosite.}, }
@article {pmid39596262, year = {2024}, author = {Mang, Q and Gao, J and Li, Q and Sun, Y and Xu, G and Xu, P}, title = {Probiotics Enhance Coilia nasus Growth Performance and Nutritional Value by Regulating Glucolipid Metabolism via the Gut-Liver Axis.}, journal = {International journal of molecular sciences}, volume = {25}, number = {22}, pages = {}, pmid = {39596262}, issn = {1422-0067}, support = {32302976//National Natural Science Foundation of China/ ; BK20230179//Natural Science Foundation of Jiangsu Province/ ; 2022YFD2400904//National Key Research and development Program of China/ ; JSGS[2021]134//Jiangsu Province seed industry revitalization "revealing-list" project/ ; }, mesh = {*Probiotics/pharmacology ; Animals ; *Gastrointestinal Microbiome/drug effects ; *Liver/metabolism ; Nutritive Value ; Lipid Metabolism ; Fishes/metabolism/growth &amp; development ; Animal Feed ; Glycolipids/metabolism ; }, abstract = {Large-scale intensive feeding triggered reduced growth performance and nutritional value. Exogenous probiotics can promote the growth performance and nutritional value of fish through improving the intestinal microbiota. However, detailed research on the correlation between the intestinal microbiota, growth performance, and nutritional value remains to be elucidated. Therefore, we performed metagenomic and metabolomic analysis to investigate the effects of probiotic addition to basal diet (1.0 × 10[8] CFU/g) (PF) and water (1.0 × 10[8] CFU/g) (PW) on the growth performance, muscle nutritional value, intestinal microbiota and their metabolites, and glucolipid metabolism in Coilia nasus. The results showed that FBW, BL, and SGR were enhanced in PF and PW groups. The concentrations of EAAs, TAAs, SFAs, MUFAs, and PUFAs were increased in PF and PW groups. Metagenomic and metabolic analyses revealed that bacterial community structure and metabolism were changed in the PF and PW groups. Moreover, adding probiotics to diet and water increased SCFAs and bile acids in the intestine. The gene expression associated with lipolysis and oxidation (hsl, pparα, cpt1, and acadm) and glycolysis (gck and pfk) was upregulated, while the gene expression associated with lipid synthesis (srebp1, acc, dgat, and elovl6) and gluconeogenesis (g6pca1, g6pca2, and pck) was downregulated in the liver. Correlation analysis displayed that hepatic glucolipid metabolism was regulated through the microbiota-gut-liver axis. Mantel test analysis showed that growth performance and muscle nutritional value were improved by the gut-liver axis. Our findings offered novel insights into the mechanisms that underlie the enhancement of growth performance and nutritional value in C. nasus and other fish by adding probiotics.}, }
@article {pmid39593380, year = {2024}, author = {Cardinali, F and Rampanti, G and Paderni, G and Milanović, V and Ferrocino, I and Reale, A and Boscaino, F and Raicevic, N and Ilincic, M and Osimani, A and Aquilanti, L and Martinovic, A and Garofalo, C}, title = {A comprehensive study on the autochthonous microbiota, volatilome, physico-chemical, and morpho-textural features of Montenegrin Njeguški cheese.}, journal = {Food research international (Ottawa, Ont.)}, volume = {197}, number = {Pt 1}, pages = {115169}, doi = {10.1016/j.foodres.2024.115169}, pmid = {39593380}, issn = {1873-7145}, mesh = {*Cheese/microbiology/analysis ; *Food Microbiology ; *Microbiota ; *Volatile Organic Compounds/analysis ; *Biogenic Amines/analysis ; Montenegro ; Bacteria/classification ; Odorants/analysis ; }, abstract = {The present study aims to deepen the knowledge of the microbiota, gross composition, physico-chemical and morpho-textural features, biogenic amines content and volatilome of Njeguški cheese, one of the most popular indigenous cheeses produced in Montenegro. Cheese samples were collected in duplicate from three different batches produced by three Montenegrin artisan producers. For the first time, the microbiota of Njeguški cheese was investigated using both culture-dependent techniques and metagenomic analysis. Coagulase positive staphylococci viable counts were below the detection limit of the analysis (<1 log cfu g[-1]). Salmonella spp., Listeria monocytogenes and staphylococcal enterotoxins were absent. However, relatively high viable counts of Enterobacteriaceae, Escherichia coli, Pseudomonadaceae and eumycetes were detected. Metataxonomic analysis revealed a core microbiome composed of Lactococcus lactis, Streptococcus thermophilus, Debaryomyces hansenii, and Kluyveromyces marxianus. Furthermore, the detection of opportunistic pathogenic yeasts such as Magnusiomyces capitatus and Wickerhamiella pararugosa, along with the variable content of biogenic amines, suggests the need for increased attention to hygienic conditions during Njeguški cheese production. Significant variability was observed in humidity (ranging from 38.37 to 45.58 %), salt content (ranging from 0.70 to 1.78 %), proteins content (ranging from 21.42 to 25.08 %), ash content (ranging from 2.97 to 4.05 %), hardness, springiness, and color among samples from different producers. Gas chromatography-mass spectrometry analysis showed a well-defined and complex volatilome profile of the Njeguški cheese, with alcohols (ethanol, isoamyl alcohol, phenetyl alcol), esters and acetates (ethyl acetate, ethyl butanoate, isoamyl acetate), ketones (acetoin, 2-butanone), and acids (acetic, butanoic, hexanoic acids) being the main chemical groups involved in aroma formation. This research will provide new insights into the still poorly explored identity of Njeguški cheese, thus serving as a first baseline for future studies aimed at protecting its tradition.}, }
@article {pmid39593354, year = {2024}, author = {Peng, Q and Zheng, H and Zhou, H and Chen, J and Xu, Y and Wang, Z and Xie, G}, title = {Elucidating core microbiota in yellow wine (Huangjiu) through flavor-oriented synthesis and construction of microbial communities.}, journal = {Food research international (Ottawa, Ont.)}, volume = {197}, number = {Pt 1}, pages = {115139}, doi = {10.1016/j.foodres.2024.115139}, pmid = {39593354}, issn = {1873-7145}, mesh = {*Volatile Organic Compounds/analysis ; *Fermentation ; *Microbiota ; *Wine/analysis/microbiology ; *Taste ; Humans ; Gas Chromatography-Mass Spectrometry ; Solid Phase Microextraction ; Pentanols/metabolism/analysis ; Odorants/analysis ; Flavoring Agents/analysis ; China ; Male ; Saccharomyces cerevisiae/metabolism ; Food Microbiology ; Female ; Phenylethyl Alcohol/metabolism/analysis ; Adult ; Butanols ; }, abstract = {Huangjiu, a traditional Chinese alcoholic beverage with a history spanning thousands of years, holds significant cultural and economic value in China. Despite its importance, the complexity of Huangjiu fermentation and the intricate interactions within its microbial community remain underexplored. This study addresses this gap by identifying the core volatile organic compounds (VOCs) and key microorganisms that define the flavor profile of Huangjiu. We employed HS-SPME-GC-MS along with aroma reconstitution and omission experiments to identify core VOCs, including Isobutanol, Isoamyl alcohol, β-Phenylethanol, and others. Metagenomic sequencing combined with QPCR was used to analyze microbial communities, revealing the temporal and spatial dynamics during fermentation. A synthetic microbial community model was constructed using the core microbes identified: Saccharomyces cerevisiae, Lactobacillus brevis, Saccharopolyspora rectivirgula, Bacillus subtilis, Leuconostoc citreum, Lactobacillus plantarum, Lactobacillus curvatus, Lactobacillus casei, and Aspergillus oryzae. This model successfully replicated Huangjiu's core VOCs and sensory characteristics, increased alcohol content, and reduced acidity. Our study contributes valuable insights into the microbial influences on Huangjiu quality, paving the way for its enhanced production and providing a foundation for future research in fermented beverages.}, }
@article {pmid39593339, year = {2024}, author = {Scarano, L and Peruzy, MF and Fallico, V and Blaiotta, G and Aponte, M and Anastasio, A and Murru, N}, title = {Provolone del Monaco PDO cheese: Lactic microflora, biogenic amines and volatilome characterization.}, journal = {Food research international (Ottawa, Ont.)}, volume = {197}, number = {Pt 1}, pages = {115257}, doi = {10.1016/j.foodres.2024.115257}, pmid = {39593339}, issn = {1873-7145}, mesh = {*Cheese/analysis/microbiology ; *Biogenic Amines/analysis ; *Lactobacillales/classification/genetics/isolation &amp; purification ; *Volatile Organic Compounds/analysis ; Metagenome/genetics ; RNA, Ribosomal, 16S ; Microbiota/genetics ; Bacterial Load ; *Food Microbiology ; }, abstract = {One commercial production run of Provolone del Monaco - a long-ripened pasta filata cheese - was followed up to the end of ripening for a total of 20 samples. 371 LAB isolates were subject to genetic characterization followed by 16S rRNA gene sequencing. The dominant species were Lacticaseibacillus casei/paracasei (19.4 %), Streptococcus macedonicus (19.1 %) and Enterococcus faecalis (13.2 %). Strains were screened for features of technological interest or safety relevance. Tyramine-producing cultures were quite common, above all within enterococci. By MALDI TOF Mass Spectrometry, one Lactococcus lactis and one Enterococcus faecium strain proved to be bacteriocin producers. Four further cheese wheels from the same production run at 623 days of ripening were evaluated for volatile organic compounds, biogenic amines, and bacterial community by metagenomic sequencing. Three individual wheel samples shared a rather similar microbiome with Lactobacillus delbrueckii and Streptococcus thermophilus as the most represented species, while the fourth wheel appeared wholly different being dominated by Lentilactobacillus buchneri and St. infantarius. Additionally, this sample had the greatest content of biogenic amines and a different VOCs composition. Given the variance seen among cheese wheels processed and ripened under the same conditions, the search for adjunct cultures in the production of this cheese seems to be of utmost importance.}, }
@article {pmid39593310, year = {2024}, author = {Li, X and Du, C and Zhao, Y and Li, J and Hu, Y and Dong, W and Peng, N and Zhao, S}, title = {Differences in microbial communities among different types of zaopei and their effects on quality and flavor of baijiu.}, journal = {Food research international (Ottawa, Ont.)}, volume = {197}, number = {Pt 1}, pages = {115224}, doi = {10.1016/j.foodres.2024.115224}, pmid = {39593310}, issn = {1873-7145}, mesh = {*Fermentation ; *Microbiota ; *Food Microbiology ; *Taste ; Ethanol/metabolism ; Fermented Foods/microbiology ; Lactobacillales/genetics/metabolism/classification ; Lactic Acid/metabolism/analysis ; Fungi/classification/genetics ; Acetic Acid/metabolism/analysis ; Oryza/microbiology ; Bacteria/classification/genetics/metabolism ; Flavoring Agents/analysis ; }, abstract = {Three types of zaopei (fermented grain) of xiaoqu light-flavor baijiu (XQZP), daqu light-flavor baijiu (DQZP), and strong-flavor baijiu (SFZP) at the end of fermentation and their dominant lactic acid bacteria were systematically compared and analyzed in this study. The results showed that these three types of zaopei differed significantly in acidity, reducing sugar content, and ethanol content, and that the main factors influencing their microbial community were acidity and lactic acid. The diversity and contents of flavor substances were significantly higher in SFZP than in DQZP and XQZP. Additionally, there was a strong correlation between dominant lactic acid bacteria and flavor substances in all three zaopei, but the correlation between fungi and flavor substances was higher than that between bacteria and flavor substances. Differential gene analysis revealed that the microbial activities followed the order of SFZP > DQZP > XQZP. The KEGG enrichment analysis indicated that the differential genes from different zaopei were enriched in different metabolic pathways. Furthermore, various microorganisms in 3 types of zaopei contained different functional genes, of which fungi mainly contained genes responsible for the synthesis of ethanol and acetic acid, while lactic acid bacteria mainly contained genes responsible for the synthesis of lactic acid. In XQZP, L. helveticus was dominant lactic acid bacteria prominent in acetic acid tolerance and lactic acid production; in DQZP, L. acetotolerans was remarkable in its tolerance to lactic acid, acetic acid, ethanol and lactic acid production; and in SFZP, A. jinshanensis was superior in acetic acid tolerance and production. Taken together, this study reveals the mechanism underlying flavor differences among three types of baijiu and provides valuable references for the development and utilization of baijiu microbial resources.}, }
@article {pmid39592704, year = {2024}, author = {Hai, C and Hao, Z and Bu, L and Lei, J and Liu, X and Zhao, Y and Bai, C and Su, G and Yang, L and Li, G}, title = {Increased rumen Prevotella enhances BCAA synthesis, leading to synergistically increased skeletal muscle in myostatin-knockout cattle.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1575}, pmid = {39592704}, issn = {2399-3642}, support = {32360837, 32341052//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Animals ; Cattle ; *Myostatin/genetics/metabolism ; *Amino Acids, Branched-Chain/metabolism/biosynthesis ; *Prevotella/genetics/metabolism ; *Muscle, Skeletal/metabolism ; *Rumen/microbiology/metabolism ; Gene Knockout Techniques ; Gastrointestinal Microbiome/genetics ; }, abstract = {Myostatin (MSTN) is a negative regulator of muscle growth, and its relationship with the gut microbiota is not well understood. In this study, we observed increase muscle area and branched-chain amino acids (BCAAs), an energy source of muscle, in myostatin knockout (MSTN-KO) cattle. To explore the link between increased BCAAs and rumen microbiota, we performed metagenomic sequencing, metabolome analysis of rumen fluid, and muscle transcriptomics. MSTN-KO cattle showed a significant increase in the phylum Bacteroidota (formerly Bacteroidetes), particularly the genus Prevotella (P = 3.12e-04). Within this genus, Prevotella_sp._CAG:732, Prevotella_sp._MSX73, and Prevotella_sp._MA2016 showed significant upregulation of genes related to BCAA synthesis. Functional enrichment analysis indicated enrichment of BCAA synthesis-related pathways in both rumen metagenomes and metabolomes. Additionally, muscle transcriptomics indicated enrichment in muscle fiber and amino acid metabolism, with upregulation of solute carrier family genes, enhancing BCAA transport. These findings suggest that elevated rumen Prevotella in MSTN-KO cattle, combined with MSTN deletion, synergistically improves muscle growth through enhanced BCAA synthesis and transport.}, }
@article {pmid39592438, year = {2025}, author = {Zhang, S and Wen, H and Chen, Y and Ning, J and Hu, D and Dong, Y and Yao, C and Yuan, B and Yang, S}, title = {Crosstalk between gut microbiota and tumor: tumors could cause gut dysbiosis and metabolic imbalance.}, journal = {Molecular oncology}, volume = {19}, number = {6}, pages = {1707-1724}, pmid = {39592438}, issn = {1878-0261}, support = {82303747//National Natural Science Foundation of China/ ; 2020GXLH-Y-010//Key Research and Development Projects of Shaanxi Province/ ; 2022JM-509//Natural Science Basic Research Program of Shaanxi Province/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology/metabolism ; Mice ; Cell Line, Tumor ; *Neoplasms/metabolism/microbiology/pathology ; Mice, Inbred C57BL ; *Colorectal Neoplasms/microbiology/metabolism/pathology ; Humans ; }, abstract = {Gut microbiota has a proven link with the development and treatment of cancer. However, the causality between gut microbiota and cancer development is still unknown and deserves exploration. In this study, we aimed to explore the alterations in gut microbiota in murine tumor models and the crosstalk between the tumor and the gut microbiota. The subcutaneous and intravenous murine tumor models using both the colorectal cancer cell line MC38 and lung cancer cell line LLC were constructed. Then fecal samples before and after tumor inoculation were collected for whole metagenomics sequencing. Both subcutaneous and metastatic tumors markedly elevated the α-diversity of the gut microbiota. Relative abundance of Ligilactobacillus and Lactobacillus was reduced after subcutaneously inoculating tumor cells, whereas Bacteroides and Duncaniella were reduced in metastatic tumors, regardless of tumor type. At the species level, Lachnospiraceae bacterium was enriched after both subcutaneous and intravenous tumors inoculation, whereas levels of Muribaculaceae bacterium Isolate-110 (HZI), Ligilactobacillus murinus and Bacteroides acidifaciens reduced. Metabolic function analysis showed that the reductive pentose phosphate cycle, urea cycle, ketone body biosynthesis, ectoine biosynthesis, C4-dicarboxylic acid cycle, isoleucine biosynthesis, inosine 5'-monophosphate (IMP), and uridine 5'-monophosphate (UMP) biosynthesis were elevated after tumor inoculation, whereas the cofactor and vitamin biosynthesis were deficient. Principal coordinates analysis (PCoA) showed that subcutaneous and metastatic tumors partially shared the same effect patterns on gut microbiota. Furthermore, fecal microbiota transplantation revealed that this altered microbiota could influence tumor growth. Taken together, this study demonstrated that both colorectal cancer (MC38) and non-colorectal cancer (LLC) can cause gut dysbiosis and metabolic imbalance, regardless of tumor type and process of tumor inoculation, and this dysbiosis influenced the tumor growth. This research gives novel insights into the crosstalk between tumors and the gut microbiota.}, }
@article {pmid39591974, year = {2024}, author = {Peng, Y and Zhu, J and Wang, S and Liu, Y and Liu, X and DeLeon, O and Zhu, W and Xu, Z and Zhang, X and Zhao, S and Liang, S and Li, H and Ho, B and Ching, JY and Cheung, CP and Leung, TF and Tam, WH and Leung, TY and Chang, EB and Chan, FKL and Zhang, L and Ng, SC and Tun, HM}, title = {A metagenome-assembled genome inventory for children reveals early-life gut bacteriome and virome dynamics.}, journal = {Cell host &amp; microbe}, volume = {32}, number = {12}, pages = {2212-2230.e8}, doi = {10.1016/j.chom.2024.10.017}, pmid = {39591974}, issn = {1934-6069}, mesh = {*Gastrointestinal Microbiome/genetics ; Infant ; Humans ; *Virome/genetics ; *Metagenome/genetics ; Child, Preschool ; Infant, Newborn ; Child ; Bacteriophages/genetics/isolation &amp; purification ; Bacteria/genetics/virology/classification ; Genome, Viral/genetics ; Feces/microbiology/virology ; Metagenomics/methods ; Female ; Bifidobacterium/genetics/isolation &amp; purification/classification ; Phylogeny ; Male ; Genome, Bacterial ; }, abstract = {Existing microbiota databases are biased toward adult samples, hampering accurate profiling of the infant gut microbiome. Here, we generated a metagenome-assembled genome inventory for children (MAGIC) from a large collection of bulk and viral-like particle-enriched metagenomes from 0 to 7 years of age, encompassing 3,299 prokaryotic and 139,624 viral species-level genomes, 8.5% and 63.9% of which are unique to MAGIC. MAGIC improves early-life microbiome profiling, with the greatest improvement in read mapping observed in Africans. We then identified 54 candidate keystone species, including several Bifidobacterium spp. and four phages, forming guilds that fluctuated in abundance with time. Their abundances were reduced in preterm infants and were associated with childhood allergies. By analyzing the B. longum pangenome, we found evidence of phage-mediated evolution and quorum sensing-related ecological adaptation. Together, the MAGIC database recovers genomes that enable characterization of the dynamics of early-life microbiomes, identification of candidate keystone species, and strain-level study of target species.}, }
@article {pmid39591767, year = {2025}, author = {Geng, Q and Wang, Z and Shi, T and Wen, C and Xu, J and Jiao, Y and Diao, W and Gu, J and Wang, Z and Zhao, L and Deng, T and Xiao, C}, title = {Cannabidiol regulates L-carnitine and butyric acid metabolism by modulating the gut microbiota to ameliorate collagen-induced arthritis.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {136}, number = {}, pages = {156270}, doi = {10.1016/j.phymed.2024.156270}, pmid = {39591767}, issn = {1618-095X}, mesh = {Animals ; *Cannabidiol/pharmacology ; *Gastrointestinal Microbiome/drug effects ; *Arthritis, Experimental/drug therapy/metabolism/microbiology ; *Butyric Acid/metabolism ; Rats ; *Carnitine/metabolism ; Male ; *Arthritis, Rheumatoid/drug therapy ; Rats, Sprague-Dawley ; Dysbiosis/drug therapy ; }, abstract = {BACKGROUND: Rheumatoid arthritis (RA) is one of the most common autoimmune diseases, affecting multiple systems in the body. Cannabidiol (CBD) is one of the most medically valuable active ingredients in cannabis. At present, CBD has been shown to alleviate the progression of RA; however, owing to its multiple targets, the mechanism of CBD is not clear.<br><br>METHODS: On the basis of the gut microbiota, we explored the mechanism by which CBD inhibits RA progression. Metagenomic and nontargeted metabolomic analyses were used to determine the changes in the intestinal ecology and plasma metabolites of collagen-induced arthritis (CIA) rats after CBD treatment.<br><br>RESULTS: CBD reversed gut dysbiosis in CIA rats, notably altering the abundances of Allobaculum_unclassified, Allobaculum_fili, and Prevotella_unclassified. In addition, metabolomic analysis confirmed that CBD increased the contents of butyric acid and L-carnitine. Allobaculum could produce butyric acid and Prevotella could accelerate the metabolism of L-carnitine. In addition, in vitro experiments demonstrated that L-carnitine participated in the regulation of neutrophils, macrophages and RA-fibroblast-like synoviocytes (RA-FLSs), which was consistent with the synovial changes in CIA rats caused by CBD.<br><br>CONCLUSION: In summary, CBD increased the plasma contents of butyric acid and L-carnitine by altering the abundances of gut microbiota, thereby inhibiting inflammation in neutrophils, macrophages and RA-FLSs. Our study is the first to explain the mechanism by which CBD alleviates progression in CIA rats from the perspective of gut microbes and metabolites, providing new views into CBD mechanisms, which warrants clinical attention.}, }
@article {pmid39591453, year = {2024}, author = {Wang, L and Liu, Y and Ni, H and Zuo, W and Shi, H and Liao, W and Liu, H and Chen, J and Bai, Y and Yue, H and Huang, A and Friedman, J and Si, T and Liu, Y and Chen, M and Dai, L}, title = {Systematic characterization of plant-associated bacteria that can degrade indole-3-acetic acid.}, journal = {PLoS biology}, volume = {22}, number = {11}, pages = {e3002921}, pmid = {39591453}, issn = {1545-7885}, mesh = {*Indoleacetic Acids/metabolism ; *Oryza/microbiology/metabolism ; *Arabidopsis/microbiology/metabolism ; *Plant Roots/microbiology/metabolism ; *Bacteria/metabolism/genetics ; Plant Growth Regulators/metabolism ; Rhizosphere ; Soil Microbiology ; Phylogeny ; Operon/genetics ; Microbiota/physiology ; Seedlings/microbiology/metabolism ; }, abstract = {Plant-associated microbiota affect pant growth and development by regulating plant hormones homeostasis. Indole-3-acetic acid (IAA), a well-known plant hormone, can be produced by various plant-associated bacteria. However, the prevalence of bacteria with the capacity to degrade IAA in the rhizosphere has not been systematically studied. In this study, we analyzed the IAA degradation capabilities of bacterial isolates from the roots of Arabidopsis and rice. Using genomics analysis and in vitro assays, we found that 21 out of 183 taxonomically diverse bacterial isolates possess the ability to degrade IAA. Through comparative genomics and transcriptomic assays, we identified iac-like or iad-like operon in the genomes of these IAA degraders. Additionally, the putative regulator of the operon was found to be highly conserved among these strains through protein structure similarity analysis. Some of the IAA degraders could utilize IAA as their carbon and energy source. In planta, most of the IAA degrading strains mitigated Arabidopsis and rice seedling root growth inhibition (RGI) triggered by exogenous IAA. Moreover, RGI caused by complex synthetic bacterial community can be alleviated by introducing IAA degraders. Importantly, we observed increased colonization preference of IAA degraders from soil to root according to the frequency of the biomarker genes in metagenome-assembled genomes (MAGs) collected from different habitats, suggesting that there is a close association between IAA degraders and IAA producers. In summary, our findings further the understanding of the functional diversity and potential biological roles of plant-associated bacteria in host plant root morphogenesis.}, }
@article {pmid39589660, year = {2024}, author = {Xue, X and Zhao, Z and Zhao, LB and Gao, YH and Xu, WH and Cai, WM and Chen, SH and Li, TJ and Nie, TY and Rui, D and Ma, Y and Qian, XS and Lin, JL and Liu, L}, title = {Gut microbiota changes in healthy individuals, obstructive sleep apnea patients, and patients treated using continuous positive airway pressure: a whole-genome metagenomic analysis.}, journal = {Sleep &amp; breathing = Schlaf &amp; Atmung}, volume = {29}, number = {1}, pages = {11}, pmid = {39589660}, issn = {1522-1709}, support = {22BJZ52//Military Health Care Project/ ; 23BJZ27//Military Health Care Project/ ; SYDW_KY[2021]04//Military experimental animal special research project/ ; }, mesh = {Humans ; *Continuous Positive Airway Pressure ; *Sleep Apnea, Obstructive/therapy/microbiology ; *Gastrointestinal Microbiome/physiology/genetics ; Male ; Middle Aged ; Female ; Adult ; *Metagenomics ; Polysomnography ; }, abstract = {PURPOSE: This study investigated variations in gut microbiota among severe obstructive sleep apnea (OSA) patients and changes in gut microbiota after continuous positive airway pressure (CPAP) treatment.<br><br>METHOD: From November 2020 to August 2021, laboratory-based polysomnography (PSG) was used to measure sleep parameters in healthy controls, severe OSA patients, and severe OSA patients treated with CPAP for three months. A fully automated biochemical analyzer was used to evaluate routine blood tests and biochemical indicators. Whole-genome metagenomic analysis was used to determine the microbial composition of gut samples from all participants. The relationships between gut microbiota and hypertension were examined using correlation analysis.<br><br>RESULT: The relative abundances of Bacteroides, Firmicutes, and Parabacteroides were significantly lower at the species level. Enterobacterales and Turicibacter were significantly higher in participants with severe OSA than healthy controls. Negative correlations were identified between Bacteroides coprocola and systolic blood pressure (SBP) (r&#x2009;=&#x2009;&#x2009;-&#x2009;0.710, P&#x2009;=&#x2009;0.003) and diastolic blood pressure (DBP) (r&#x2009;=&#x2009;&#x2009;-&#x2009;0.615, P&#x2009;=&#x2009;0.015). Conversely, a positive correlation was found between Escherichia coli and SBP (r&#x2009;=&#x2009;0.568, P&#x2009;=&#x2009;0.027).<br><br>CONCLUSION: The metabolic pathways and gut microbiota differed significantly between the control group and individuals with severe OSA. Additionally, CPAP therapy substantially changed the metabolic pathways and gut microbial composition among patients diagnosed with severe OSA. Correlation analysis further revealed a strong association between Escherichia coli, Bacteroides coprocola, and blood pressure levels.}, }
@article {pmid39589588, year = {2024}, author = {Wanna, W and Aucharean, C and Jaeram, N}, title = {Analysis of Gut Microbiota Associated with WSSV Resistance in Litopenaeus vannamei.}, journal = {Marine biotechnology (New York, N.Y.)}, volume = {27}, number = {1}, pages = {10}, pmid = {39589588}, issn = {1436-2236}, support = {SCI6601054S//The National Science, Research and Innovation Fund (NSRF) and Prince of Songkla University/ ; SCI6601054S//The National Science, Research and Innovation Fund (NSRF) and Prince of Songkla University/ ; PSU_PHD2565-004//The Graduate School, Prince of Songkla University/ ; }, mesh = {Animals ; *Penaeidae/microbiology/virology ; *White spot syndrome virus 1/genetics ; *Gastrointestinal Microbiome/genetics ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification ; Disease Resistance/genetics ; Metagenome ; }, abstract = {Microorganisms in the digestive tract regulate the metabolism of host cells as well as stimulate the immune system of the host. If the microbiota is in good balance, it will promote the good health of the host. In this study, using 16S rRNA sequencing, we analyzed the microbiota of three groups of shrimp: a group of normal shrimp (control group), shrimp that were killed by infection with the white spot syndrome virus (WSSV) (susceptible group), and shrimp that survived WSSV infection (resistant group). The results showed that although the alpha diversity of the microbiota was barely affected by the WSSV, the bacterial communities in the three groups had different prevalences. The resistant group harbored significantly more bacteria than both the other groups. Remarkably, the resistant group had the greatest prevalence of the phylum Bacterioidetes, the families Rhodobacteraceae and Flavobacteriaceae, and the genus Nautella, suggesting their potential as biomarkers for shrimp resistance to WSSV infection. In addition, analysis of functional diversity in bacterial communities showed that the abundance of bacterial metagenomes in two groups infected with WSSV was mostly linked to metabolism and cellular processes. The susceptible WSSV group exhibited a significant reduction in amino acid metabolism. This result suggested that metabolism was the principal factor affecting the alteration in the microbiota after WSSV infection. This overview of the gut microbiota of shrimp infected with the WSSV offers crucial insights for aquaculture management and simplifies the use of control strategies in the future.}, }
@article {pmid39589125, year = {2024}, author = {Zhang, Z and Tong, M and Ding, W and Liu, S and Jong, M-C and Radwan, AA and Cai, Z and Zhou, J}, title = {Changes in the diversity and functionality of viruses that can bleach healthy coral.}, journal = {mSphere}, volume = {9}, number = {12}, pages = {e0081624}, pmid = {39589125}, issn = {2379-5042}, mesh = {*Anthozoa/virology/microbiology ; Animals ; *Microbiota/genetics ; *Viruses/genetics/classification ; *Metagenomics ; Bacteria/genetics/classification/virology/isolation &amp; purification ; Symbiosis ; Bacteriophages/genetics/physiology/classification/isolation &amp; purification ; }, abstract = {UNLABELLED: Coral microbiomes play a crucial role in maintaining the health and functionality of holobionts. Disruption in the equilibrium of holobionts, including bacteria, fungi, and archaea, can result in the bleaching of coral. However, little is known about the viruses that can infect holobionts in coral, especially bacteriophages. Here, we employed a combination of amplicon and metagenomic analyses on Acropora muricata and Galaxea astreata to investigate the diversity and functionality of viruses in healthy and bleached corals. Analysis showed that the alpha diversity of holobionts (bacteria, eukaryotes, zooxanthellae, and lysogenic and lytic viruses) was higher in bleached corals than that in healthy corals. Meanwhile, bleached corals exhibited a relatively higher abundance of specific viral classes, including Revtraviricetes, Arfiviricetes, Faserviricetes, Caudoviricetes, Herviviricetes, and Tectiliviricetes; moreover, we found that the expression levels of functional genes involved in carbon and sulfur metabolism were enriched. An increase in Vibrio abundance has been reported as a notable factor in coral bleaching; our analysis also revealed an increased abundance of Vibrio in bleached coral. Finally, bleached corals contained a higher abundance of Vibrio phages and encoded more virulence factor genes to increase the competitiveness of Vibrio after coral bleaching. In conclusion, we attempted to understand the causes of coral bleaching from the perspective of phage-bacteria-coral tripartite interaction.<br><br>IMPORTANCE: Viruses, especially bacteriophages, outnumber other microorganisms by approximately 10-fold and represent the most abundant members of coral holobionts. Corals represent a model system for the study of symbiosis, the influence of viruses on organisms inhabiting healthy coral reef, the role of rapid horizontal gene transfer, and the expression of auxiliary metabolic genes. However, the least studied component of coral holobiont are viruses. Therefore, there is a critical need to investigate the viral community of viruses, and their functionality, in healthy and bleached coral. Here, we compared the composition and functionality of viruses in healthy and bleached corals and found that viruses may participate in the induction of coral bleaching by enhancing the expression of virulence genes and other auxiliary metabolic functions.}, }
@article {pmid39588334, year = {2024}, author = {Zhang, J and Wu, L and Zhang, Z and Li, D and Han, R and Ye, L and Zhang, Y and Hong, J and Gu, W}, title = {Gut microbiota and metabolic profiles in adults with unclassified diabetes: a cross-sectional study.}, journal = {Frontiers in endocrinology}, volume = {15}, number = {}, pages = {1440984}, pmid = {39588334}, issn = {1664-2392}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Female ; Male ; Adult ; Case-Control Studies ; Cross-Sectional Studies ; *Diabetes Mellitus, Type 2/microbiology/metabolism/blood ; *Metabolome ; Diabetes Mellitus, Type 1/microbiology/metabolism/blood ; Biomarkers/blood ; Young Adult ; }, abstract = {AIMS: Our study, employing a multi-omics approach, aimed to delineate the distinct gut microbiota and metabolic characteristics in individuals under 30 with unclassified diabetes, thus shedding light on the underlying pathophysiological mechanisms.<br><br>METHODS: This age- and sex-matched case-control study involved 18 patients with unclassified diabetes, 18 patients with classic type 1 diabetes, 13 patients with type 2 diabetes, and 18 healthy individuals. Metagenomics facilitated the profiling of the gut microbiota, while untargeted liquid chromatography-mass spectrometry was used to quantify the serum lipids and metabolites.<br><br>RESULTS: Our findings revealed a unique gut microbiota composition in unclassified diabetes patients, marked by a depletion of Butyrivibrio proteoclasticus and Clostridium and an increase in Ruminococcus torques and Lachnospiraceae bacterium 8_1_57FAA. Comparative analysis identified the combined marker panel of five bacterial species, seven serum biomarkers, and three clinical parameters could differentiate patients with UDM from HCs with an AUC of 0.94 (95% CI 0.85-1). Notably, the gut microbiota structure of patients with unclassified diabetes resembled that of type 2 diabetes patients, especially regarding disrupted lipid and branched-chain amino acid metabolism.<br><br>CONCLUSIONS: Despite sharing certain metabolic features with type 2 diabetes, unclassified diabetes presents unique features. The distinct microbiota and metabolites in unclassified diabetes patients suggest a significant role in modulating glucose, lipid, and amino acid metabolism, potentially influencing disease progression. Further longitudinal studies are essential to explore therapeutic strategies targeting the gut microbiota and metabolites to modify the disease trajectory.}, }
@article {pmid39587811, year = {2024}, author = {Xu, N and Chen, B and Wang, Y and Lei, C and Zhang, Z and Ye, Y and Jin, M and Zhang, Q and Lu, T and Dong, H and Shou, J and Penuelas, J and Zhu, YG and Qian, H}, title = {Integrating Anthropogenic-Pesticide Interactions Into a Soil Health-Microbial Index for Sustainable Agriculture at Global Scale.}, journal = {Global change biology}, volume = {30}, number = {11}, pages = {e17596}, doi = {10.1111/gcb.17596}, pmid = {39587811}, issn = {1365-2486}, support = {22376187//National Natural Science Foundation of China/ ; 21777144//National Natural Science Foundation of China/ ; 21976161//National Natural Science Foundation of China/ ; LZ23B070001//Zhejiang Provincial Natural Science Foundation of China/ ; 2021YFA0909500//National Key Research and Development Program of China/ ; MMLKF23-03//Open Funding Project of the State Key Laboratory of Microbial Metabolism/ ; TED2021-132627 B-I00//MCIN, AEI/10.13039/501100011033 European Union Next Generation EU/PRTR/ ; PID2022-140808NB-I00//Spanish Government grants/ ; }, mesh = {*Soil Microbiology ; *Agriculture/methods ; *Pesticides/analysis ; Microbiota ; Sustainable Development ; Soil/chemistry ; Metagenome ; Soil Pollutants/analysis ; Machine Learning ; }, abstract = {Soil microbiota in intensive agriculture are threatened by pesticides, economic activities, and land-use changes. However, the interactions among these anthropogenic factors remain underexplored. By analyzing 2356 soil metagenomes from around the world, we developed a comprehensive soil health-microbial index that integrates microbial diversity, nutrient cycling potential, metabolic potential, primary productivity, and health risks to assess how the soil microbiota respond to anthropogenic factors. Our results indicated that the health-microbial index was the lowest with severe pesticide contamination. Pesticides, in combination with other anthropogenic and climatic factors, exacerbate the decline in this index. Machine learning predictions suggest that the health-microbial index in approximately 26% of global farmland could decline between 2015 and 2040, even under sustainable development scenarios. Even with strategies to reduce pesticide usage, we cannot completely halt the decline in the health-microbial index. Our findings highlight that sustaining soil microbial health on a global scale requires addressing not only pesticide management but also broader anthropogenic impacts.}, }
@article {pmid39587335, year = {2024}, author = {Liu, Y and Du, S and Sun, L and Li, Y and Liu, M and Sun, P and Bai, B and Ge, G and Jia, Y and Wang, Z}, title = {Volatile metabolomics and metagenomics reveal the effects of lactic acid bacteria on alfalfa silage quality, microbial communities, and volatile organic compounds.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1565}, pmid = {39587335}, issn = {2399-3642}, mesh = {*Volatile Organic Compounds/metabolism/analysis ; *Silage/microbiology/analysis ; *Metabolomics/methods ; *Microbiota ; *Metagenomics/methods ; *Medicago sativa/microbiology/metabolism ; Lactobacillales/metabolism/genetics ; Lactobacillus plantarum/metabolism/genetics ; }, abstract = {Lactic acid bacteria metabolism affects the composition of volatile organic compounds (VOCs) in alfalfa silage, which results in differences of odor and quality. The aim of this study was to reveal the effects of commercial Lactobacillus plantarum (CL), screened Lactobacillus plantarum (LP), and screened Pediococcus pentosaceus (PP) on quality, microbial community, and VOCs of alfalfa silage based on volatile metabolomics and metagenomics. The results showed that the LP and PP groups had higher sensory and quality grades, and the dominant bacteria were Lactiplantibacillus plantarum and Pediococcus pentosaceus. The main VOCs in alfalfa silage were terpenoids (25.29%), esters (17.08%), and heterocyclic compounds (14.43%), and esters such as methyl benzoate, ethyl benzoate, and ethyl salicylate were significantly increased in the LP and PP groups (P < 0.05). Correlation analysis showed that terpenoids, esters, and alcohols with aromatic odors were positively correlated with Lactiplantibacillus plantarum and Pediococcus pentosaceus. Microbial functions in carbohydrate and amino acid metabolism, biosynthesis of secondary metabolites, and degradation of aromatic compounds were significantly enriched. In conclusion, the addition of lactic acid bacteria can increase the aromatic substances in silage and further improve silage odor and quality.}, }
@article {pmid39587088, year = {2024}, author = {Honorato, L and Paião, HGO and da Costa, AC and Tozetto-Mendoza, TR and Mendes-Correa, MC and Witkin, SS}, title = {Viruses in the female lower reproductive tract: a systematic descriptive review of metagenomic investigations.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {137}, pmid = {39587088}, issn = {2055-5008}, mesh = {Female ; Humans ; *Metagenomics/methods ; *Viruses/genetics/classification ; *Virome ; Microbiota ; Genitalia, Female/virology/microbiology ; Metagenome ; }, abstract = {The lower female reproductive tract (FRT) hosts a complex microbial environment, including eukaryotic and prokaryotic viruses (the virome), whose roles in health and disease are not fully understood. This review consolidates findings on FRT virome composition, revealing the presence of various viral families and noting significant gaps in knowledge. Understanding interactions between the virome, microbiome, and immune system will provide novel insights for preventing and managing lower genital tract disorders.}, }
@article {pmid39586993, year = {2024}, author = {Zhao, Y and Bhatnagar, S}, title = {Epigenetic Modulations by Microbiome in Breast Cancer.}, journal = {Advances in experimental medicine and biology}, volume = {1465}, number = {}, pages = {55-69}, doi = {10.1007/978-3-031-66686-5_4}, pmid = {39586993}, issn = {0065-2598}, mesh = {Humans ; *Breast Neoplasms/genetics/microbiology ; *Epigenesis, Genetic ; Female ; *Tumor Microenvironment/genetics ; *Gene Expression Regulation, Neoplastic ; Microbiota/genetics ; Animals ; DNA Methylation ; Gastrointestinal Microbiome/genetics ; }, abstract = {Recent studies have identified a critical role of the diverse and dynamic microbiome in modulating various aspects of host physiology and intrinsic processes. However, the altered microbiome has also become a hallmark of cancer, which could influence the tumor microenvironment. Aberrations in epigenetic regulation of tumor suppressors, apoptotic genes, and oncogenes can accentuate breast cancer onset and progression. Interestingly, recent studies have established that the microbiota modulates the epigenetic mechanisms at global and gene-specific levels. While the mechanistic basis is unclear, the cross-talk between the microbiome and epigenetics influences breast cancer trajectory. Here, we review different epigenetic mechanisms of mammalian gene expression and summarize the host-associated microbiota distributed across the human body and their influence on cancer and other disease-related genes. Understanding this complex relationship between epigenetics and the microbiome holds promise for new insights into effective therapeutic strategies for breast cancer patients.}, }
@article {pmid39585984, year = {2024}, author = {Padhi, C and Field, CM and Forneris, CC and Olszewski, D and Fraley, AE and Sandu, I and Scott, TA and Farnung, J and Ruscheweyh, HJ and Narayan Panda, A and Oxenius, A and Greber, UF and Bode, JW and Sunagawa, S and Raina, V and Suar, M and Piel, J}, title = {Metagenomic study of lake microbial mats reveals protease-inhibiting antiviral peptides from a core microbiome member.}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {121}, number = {49}, pages = {e2409026121}, pmid = {39585984}, issn = {1091-6490}, support = {1-001369-000//Promedica Stiftung/ ; 205320_185077//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (SNF)/ ; 205320_219638//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (SNF)/ ; 310030_212802//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (SNF)/ ; n/a//Peter und Traudl Engelhorn Stiftung (Peter and Traudl Engelhorn Foundation)/ ; 897571//EC | Horizon Europe | Excellent Science | HORIZON EUROPE Marie Sklodowska-Curie Actions (MSCA)/ ; }, mesh = {*Lakes/microbiology ; *Antiviral Agents/pharmacology/chemistry ; *Microbiota ; *Metagenomics/methods ; Protease Inhibitors/pharmacology/metabolism ; Peptides/metabolism/chemistry ; Multigene Family ; Metagenome ; India ; Bacteria/drug effects/genetics/metabolism ; }, abstract = {In contrast to the large body of work on bioactive natural products from individually cultivated bacteria, the chemistry of environmental microbial communities remains largely elusive. Here, we present a comprehensive bioinformatic and functional study on a complex and interaction-rich ecosystem, algal-bacterial (microbial) mats of Lake Chilika in India, Asia's largest brackish water body. We report the bacterial compositional dynamics over the mat life cycle, >1,300 reconstructed environmental genomes harboring >2,200 biosynthetic gene clusters (BGCs), the successful cultivation of a widespread core microbiome member belonging to the genus Rheinheimera, heterologous reconstitution of two silent Rheinheimera biosynthetic pathways, and new compounds with potent protease inhibitory and antiviral activities. The identified substances, posttranslationally modified peptides from the graspetide and spliceotide families, were targeted among the large BGC diversity by applying a strategy focusing on recurring multi-BGC loci identified in diverse samples, suggesting their presence in successful colonizers. In addition to providing broad insights into the biosynthetic potential of a poorly studied community from sampling to bioactive substances, the study highlights the potential of ribosomally synthesized and posttranslationally modified peptides as a large, underexplored resource for antiviral drug discovery.}, }
@article {pmid39584840, year = {2024}, author = {Bernardin, JR and Young, EB and Gray, SM and Bittleston, LS}, title = {Bacterial community function increases leaf growth in a pitcher plant experimental system.}, journal = {mSystems}, volume = {9}, number = {12}, pages = {e0129824}, pmid = {39584840}, issn = {2379-5077}, mesh = {*Plant Leaves/microbiology/growth &amp; development ; *Sarraceniaceae/microbiology ; *Microbiota/physiology ; *Bacteria/genetics ; Metagenomics ; }, abstract = {UNLABELLED: Across diverse ecosystems, bacteria and their hosts engage in complex relationships having negative, neutral, or positive interactions. However, the specific effects of leaf-associated bacterial community functions on plant growth are poorly understood. Although microbes can promote plant growth through various biochemical mechanisms, investigating the community's functional contributions to plant growth remains to be explored. To address this gap, we characterized the relationships between bacterial community function and host plant growth in the purple pitcher plant (Sarracenia purpurea). The main aim of our research was to investigate how different bacterial community functions affect the growth and nutrient content in the plant. Previous research has suggested that microbial communities aid in prey decomposition and subsequent nutrient acquisition in carnivorous plants, including S. purpurea. However, the specific functional roles of bacterial communities in plant growth and nutrient uptake are not well known. In this study, sterile, freshly opened pitchers were inoculated with three functionally distinct, pre-assembled bacterial communities. Bacterial community composition and function were measured over 8 weeks using physiological assays, metagenomics, and metatranscriptomics. Distinct community functions affected plant traits; a bacterial community enriched in decomposition was associated with larger leaves with almost double the biomass of control pitchers. Physiological differences in bacterial communities were supported by metatranscriptomics; for example, the bacterial community with the highest chitinase activity had greater expression of transcripts associated with chitinase enzymes. The relationship between bacterial community function and plant growth observed here indicates potential mechanisms, such as chitinase activity, for host-associated bacterial functions to support pitcher plant growth.<br><br>IMPORTANCE: This study addresses a gap in understanding the relationships between bacterial community function and plant growth. We inoculated sterile, freshly opened pitcher plant leaves with three functionally distinct bacterial communities to uncover potential mechanisms through which bacterial functions support plant health and growth. Our findings demonstrate that distinct community functions significantly influence plant traits, with some bacterial communities supporting more plant growth than in control pitchers. These results highlight the ecological roles of microbial communities in plants and thus ecosystems and suggest that nutrient cycling is an important pathway through which microbes support host plant health. This research provides valuable insights into plant-microbe interactions and the effects of diverse microbial community functions.}, }
@article {pmid39582241, year = {2025}, author = {Zhang, M and Zhang, L and Suo, B and Wei, Y and Xu, Y and Jiang, M and Dong, J and Li, X and Song, Z and Liu, D}, title = {Distribution Characteristics and Impacting Factors of Drug CYP Enzymes and Transporters in the Gastrointestinal Tract of Chinese Healthy Subjects.}, journal = {Clinical pharmacology and therapeutics}, volume = {117}, number = {3}, pages = {676-689}, doi = {10.1002/cpt.3497}, pmid = {39582241}, issn = {1532-6535}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; ATP Binding Cassette Transporter, Subfamily G, Member 2/metabolism ; China ; Chromatography, Liquid ; *Cytochrome P-450 Enzyme System/metabolism/genetics ; Feces/microbiology ; Gastrointestinal Microbiome ; *Gastrointestinal Tract/enzymology/metabolism ; Genotype ; Healthy Volunteers ; *Membrane Transport Proteins/metabolism ; Tandem Mass Spectrometry ; East Asian People ; Neoplasm Proteins ; }, abstract = {The abundance of drug metabolic enzymes (DMEs) and transporters (DTs) in the human gastrointestinal tract significantly affects xenobiotic exposure in the circulating system, the basis of these compounds acting on humans. However, accurately predicting individual exposure in healthy subjects remains challenging due to limited data on protein levels throughout the gastrointestinal tract within the same individuals and inadequate assessment of factors influencing these levels. Therefore, we conducted a clinical study to obtain biopsy samples from 8 different gastrointestinal segments in 24 healthy Chinese volunteers. Concurrently, blood and fecal samples were collected for genotypic analysis and fecal microbiota metagenomic sequencing. Using an optimized LC-MS/MS method, we quantified the absolute protein abundance of CYP2C9, CYP2C19, CYP2D6, CYP3A4, P-gp, and BCRP from the stomach to the colon. Our results revealed significant regional differences in protein expression: CYP3A4 was the most abundant in the small intestine, whereas CYP2C9 was predominantly found in the colon. CYP2D6 was primarily located in the ileum, while other DMEs/DTs showed higher concentrations in the jejunum. Meanwhile, the enzyme abundance in the small intestine and colon and the relative ratio of transporters in different regions to the jejunum were accurately calculated, providing valuable data for refining the physiological parameters in the virtual gastrointestinal tract of Chinese healthy population in PBBMs. Additionally, BMI, IBW, sex, age, genotype, and fecal microbiota were identified as critical factors influencing the protein levels of these DMEs/DTs throughout the gastrointestinal tract, with notable regional differences. Consequently, this study provides a unique foundation for understanding xenobiotic absorption in humans.}, }
@article {pmid39582065, year = {2024}, author = {Velsko, IM and Fagernäs, Z and Tromp, M and Bedford, S and Buckley, HR and Clark, G and Dudgeon, J and Flexner, J and Galipaud, JC and Kinaston, R and Lewis, CM and Matisoo-Smith, E and Nägele, K and Ozga, AT and Posth, C and Rohrlach, AB and Shing, R and Simanjuntak, T and Spriggs, M and Tamarii, A and Valentin, F and Willie, E and Warinner, C}, title = {Exploring the potential of dental calculus to shed light on past human migrations in Oceania.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {10191}, pmid = {39582065}, issn = {2041-1723}, support = {EXC 2051, 390713860//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; SRC 8038-06//National Geographic Society/ ; }, mesh = {Humans ; *Human Migration/history ; *Dental Calculus/microbiology/history ; Oceania ; *Microbiota/genetics ; Archaeology ; Phylogeny ; Pacific Islands ; Asia, Southeastern ; Metagenomics/methods ; DNA, Ancient/analysis ; History, Ancient ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {The Pacific islands and Island Southeast Asia have experienced multiple waves of human migrations, providing a case study for exploring the potential of ancient microbiomes to study human migration. We perform a metagenomic study of archaeological dental calculus from 102 individuals, originating from 10 Pacific islands and 1 island in Island Southeast Asia spanning ~3000 years. Oral microbiome DNA preservation in calculus is far higher than that of human DNA in archaeological bone, and comparable to that of calculus from temperate regions. Oral microbial community composition is minimally driven by time period and geography in Pacific and Island Southeast Asia calculus, but is found to be distinctive compared to calculus from Europe, Africa, and Asia. Phylogenies of individual bacterial species in Pacific and Island Southeast Asia calculus reflect geography. Archaeological dental calculus shows good preservation in tropical regions and the potential to yield information about past human migrations, complementing studies of the human genome.}, }
@article {pmid39581874, year = {2024}, author = {Li, Y and Pan, G and Wang, S and Li, Z and Yang, R and Jiang, Y and Chen, Y and Li, SC and Shen, B}, title = {Comprehensive human respiratory genome catalogue underlies the high resolution and precision of the respiratory microbiome.}, journal = {Briefings in bioinformatics}, volume = {26}, number = {1}, pages = {}, pmid = {39581874}, issn = {1477-4054}, mesh = {Humans ; *Microbiota/genetics ; Genome, Human ; Metagenome ; Respiratory System/microbiology ; Bacteria/genetics/classification ; }, abstract = {The human respiratory microbiome plays a crucial role in respiratory health, but there is no comprehensive respiratory genome catalogue (RGC) for studying the microbiome. In this study, we collected whole-metagenome shotgun sequencing data from 4067 samples and sequenced long reads of 124 samples, yielding 9.08 and 0.42 Tbp of short- and long-read data, respectively. By submitting these data with a novel assembly algorithm, we obtained a comprehensive human RGC. This high-quality RGC contains 190,443 contigs over 1 kbps and an N50 length exceeding 13 kbps; it comprises 159 high-quality and 393 medium-quality genomes, including 117 previously uncharacterized respiratory bacteria. Moreover, the RGC contains 209 respiratory-specific species not captured by the unified human gastrointestinal genome. Using the RGC, we revisited a study on a pediatric pneumonia dataset and identified 17 pneumonia-specific respiratory pathogens, reversing an inaccurate etiological conclusion due to the previous incomplete reference. Furthermore, we applied the RGC to the data of 62 participants with a clinical diagnosis of infection. Compared to the Nucleotide database, the RGC yielded greater specificity (0 versus 0.444, respectively) and sensitivity (0.852 versus 0.881, respectively), suggesting that the RGC provides superior sensitivity and specificity for the clinical diagnosis of respiratory diseases.}, }
@article {pmid39581825, year = {2025}, author = {Isali, I and Almassi, N and Nizam, A and Campbell, R and Weight, C and Gupta, S and Pooja, G and Fulmes, A and Mishra, K and Abbosh, P and Bukavina, L}, title = {State of the Art: The Microbiome in Bladder Cancer.}, journal = {Urologic oncology}, volume = {43}, number = {4}, pages = {199-208}, doi = {10.1016/j.urolonc.2024.11.008}, pmid = {39581825}, issn = {1873-2496}, mesh = {Humans ; *Urinary Bladder Neoplasms/microbiology ; *Microbiota ; Tumor Microenvironment ; }, abstract = {This review assesses the current understanding of the relationship between the human microbiome and BCa. Recognizing how the microbiome affects the tumor microenvironment provides valuable insights into cancer biology, potentially uncovering interactions that could be leveraged to develop innovative therapeutic approaches. By clarifying these intricate microbial-tumor dynamics, novel targets for microbiome-based interventions can be identified, ultimately improving treatment effectiveness and patient outcomes. Current literature lacks comprehensive insights into the effects of BCa treatment on the microbiome and the prevalence of immunotherapy-related toxicities. Further research into the microbiome's role in BCa development could bridge the gap between fundamental research and therapeutic applications. Implementing microbiome surveillance, metagenomic sequencing, and metabolomics in clinical trials could deepen our understanding of BCa and its treatment. This review explores the existing understanding of the urine, tissue, and gut microbiomes and their connections to BCa. Enhanced knowledge of these relationships can pave the way for future research to identify reliable disease predictors, prognostic markers, and novel therapeutic targets.}, }
@article {pmid39581260, year = {2025}, author = {Lee, YH and Park, HJ and Jeong, SJ and Auh, QS and Jung, J and Lee, GJ and Shin, S and Hong, JY}, title = {Oral microbiome profiles of gingivitis and periodontitis by next-generation sequencing among a group of hospital patients in Korea: A cross-sectional study.}, journal = {Journal of oral biosciences}, volume = {67}, number = {1}, pages = {100591}, doi = {10.1016/j.job.2024.100591}, pmid = {39581260}, issn = {1880-3865}, mesh = {Humans ; Cross-Sectional Studies ; *Periodontitis/microbiology ; *Microbiota/genetics ; Female ; Male ; *Gingivitis/microbiology ; Adult ; Middle Aged ; RNA, Ribosomal, 16S/genetics ; High-Throughput Nucleotide Sequencing ; Saliva/microbiology ; Republic of Korea ; *Mouth/microbiology ; }, abstract = {OBJECTIVES: The oral microbiome plays an important role in the development and progression of periodontal disease. The purpose of this study was to compare microbial profiles of oral cavities in good health, with gingivitis, and in a state of periodontitis, and to identify novel pathogens involved in periodontal diseases.<br><br>METHODS: One hundred and two participants, including 33 healthy controls, 41 patients with gingivitis, and 28 patients with periodontitis, were included in this cross-sectional study. Salivary oral microbiomes were investigated using 16S rRNA metagenomic sequencing, and the microbial profiles of each group were compared using age- and sex-adjusted general linear models.<br><br>RESULTS: The abundance of amplicon sequence variants and Chao1 diversity were significantly elevated in the gingivitis and periodontitis groups relative to healthy controls (p&#xa0;=&#xa0;0.046). Based on linear discriminant analysis (LDA) scores (>2), Tenericutes, Mollicutes, Mycoplasmatales, Mycoplasmataceae, Mycoplasma, Bacteroidaceae, and Phocaeicola were significantly enriched in the gingivitis group, and Synergistetes, Synergistia, Synergistales, Synergistaceae, Fretibacterium, Sinanaerobacter, and Filifactor were enriched in the periodontitis group. The relative abundances of Fretibacterium fastidiosum, Sinanaerobacter chloroacetimidivorans, and Filifactor alocis (q&#xa0;=&#xa0;0.008, all bacteria) were highest in the periodontitis group and lowest in the control group. The relative abundance of Treponema denticola was significantly elevated in the periodontitis group compared to the other two groups (q&#xa0;=&#xa0;0.024).<br><br>CONCLUSIONS: Oral microbiomes differed between groups. T. denticola, F. fastidiosum, S. chloroacetimidivorans and F. alocis were significantly more abundant in the periodontitis group than in the control group. Additionally, the abundance of T. denticola and F. fastidiosum in the periodontitis group was significantly different from that in the gingivitis group.}, }
@article {pmid39580871, year = {2025}, author = {Kumar, S and Bhatia, Z and Seshadri, S}, title = {Formulated chitosan microspheres remodelled the altered gut microbiota and liver miRNA in diet-induced Type-2 diabetic rats.}, journal = {Carbohydrate research}, volume = {547}, number = {}, pages = {109301}, doi = {10.1016/j.carres.2024.109301}, pmid = {39580871}, issn = {1873-426X}, mesh = {*Chitosan/pharmacology/chemistry ; Animals ; *Gastrointestinal Microbiome/drug effects ; *MicroRNAs/metabolism ; *Microspheres ; Rats ; Male ; *Diabetes Mellitus, Type 2/drug therapy/metabolism ; *Diabetes Mellitus, Experimental/drug therapy/chemically induced/metabolism ; *Liver/drug effects/pathology/metabolism ; Hypoglycemic Agents/pharmacology/chemistry ; Metformin/pharmacology ; Diet, High-Fat/adverse effects ; }, abstract = {Chitosan was formulated into a microsphere and comprehensively characterized and evaluated for its anti-inflammatory potential and anti-diabetic properties against the high sugar fat diet-induced diabetic animals. The diabetic model was induced through feeding with a high-sugar fat diet. Metformin, a standard antidiabetic drug, and CMS (chitosan microspheres) were administered orally for 90 days as reversal strategies. Upon completion of the study, the following parameters, such as serum biochemistry, cytokine analysis, tissue histology, liver miRNA sequencing, and Shotgun metagenomics studies from stool samples, were performed. SEM images of the microsphere indicated a smooth morphology, while FTIR and DSC respectively, confirmed the presence of functional groups of chitosan and the thermal stability of the formulation. Following HSFD induction, all the parameters analyzed were altered compared to the control group. In both reversal groups, serum biochemical parameters were restored, which was at par with the control. A significant increase in the anti-inflammatory cytokine IL-10, and a remarkable reduction in TNF-α and MCP-1 inflammatory cytokines were observed in both reversal groups. Tissue histology indicated improvements in low-grade inflammation, induced in the diabetic group. miR-203 was upregulated in the CMS-treated group, while miR-103 was downregulated. The study further delved into the impact on gut microbiota and KEGG. Major phyla i.e., Bacteroidetes, Cyanobacteria, Firmicutes, Proteobacteria, and Verrucomicrobia showed restoration, while upregulation of DNA polymerase zeta in T2D showed reversal after the treatment. The formulation showed reversal at par with metformin and also confirms its anti-diabetic and anti-inflammatory activities of CMS, with microfloral and miR regulatory functions.}, }
@article {pmid39580566, year = {2024}, author = {Gomes, WDS and Partelli, FL and Veloso, TGR and da Silva, MCS and Moreli, AP and Moreira, TR and Pereira, LL}, title = {Effects of Coffea canephora genotypes on the microbial community of soil and fruit.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {29035}, pmid = {39580566}, issn = {2045-2322}, support = {23186000886201801//Sul Serrana of Esp&#xed;rito Santo Free Admission Credit Cooperative- SICOOB/ ; 23186000886201801//Sul Serrana of Esp&#xed;rito Santo Free Admission Credit Cooperative- SICOOB/ ; 23186000886201801//Sul Serrana of Esp&#xed;rito Santo Free Admission Credit Cooperative- SICOOB/ ; }, mesh = {*Coffea/microbiology/genetics ; *Soil Microbiology ; *Fruit/microbiology ; *Genotype ; *Microbiota/genetics ; *Rhizosphere ; Bacteria/genetics/classification/isolation &amp; purification ; Fungi/genetics/classification/isolation &amp; purification ; Brazil ; Soil ; RNA, Ribosomal, 16S/genetics ; }, abstract = {In recent years, the role of microbial communities in agricultural systems has received increasing attention, particularly concerning their impact on plant health and productivity. However, the influence of host plant genetic factors on the microbial composition of coffee plants remains largely unexplored. This study provides the first comprehensive investigation into how genotype affects the microbial communities present in the rhizosphere and fruits of Coffea canephora. Conducted on a commercial coffee farm in Brazil, we analyzed six genotypes of C. canephora var. Conilon. Soil and fruit samples were collected from which microbial DNA was extracted and sequenced, targeting the V3-V4 region of the 16 S rDNA and the ITS1 region for fungi. A total of 12,239,769 reads were generated from the 16 S rDNA and ITS1 regions. The PCoA revealed distinct patterns of beta diversity, with genotype 153 exhibiting significant isolation in soil bacterial communities. The dominant bacterial orders included Rhizobiales and Rhodobacterales, while the fungal community comprised diverse taxa from Saccharomycetales and Hypocreales. LEfSe analysis identified key metagenomic biomarkers, highlighting genotype Baiano 4 for its richness in fruit-associated taxa, whereas genotype 153 exhibited lower diversity in both soil and fruit samples. This work enhances our understanding of the microbiomes associated with different coffee genotypes, providing evidence of how host genetic variation influences microbial community composition. Our findings indicate that specific microbial taxa are enriched in the fruits and soil of various genotypes. Future research should focus on identifying these microorganisms and elucidating their specific functions within the rhizosphere and coffee fruits.}, }
@article {pmid39580523, year = {2024}, author = {Li, J and Zhai, X and Chen, C and Zhang, R and Huang, X and Liu, Y}, title = {The intrahepatic bacterial metataxonomic signature of patients with hepatocellular carcinoma.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {29077}, pmid = {39580523}, issn = {2045-2322}, support = {32300081//the National Natural Science Foundation of China/ ; 23QA1406600//Shanghai Science and Technology Committee/ ; }, mesh = {Humans ; *Carcinoma, Hepatocellular/microbiology/pathology/metabolism ; *Liver Neoplasms/microbiology/pathology/metabolism ; Male ; Female ; Middle Aged ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Metagenomics/methods ; RNA, Ribosomal, 16S/genetics ; Aged ; Liver/microbiology/pathology/metabolism ; Microbiota ; Liver Cirrhosis/microbiology/pathology ; Adult ; }, abstract = {Dysbiosis of the gut-liver axis increases the risk of bacterial and metabolite influx into the liver, which may contribute to the development of hepatocellular carcinoma (HCC). In this study, we compared the microbiomes in HCC tumors and adjacent tissues. We examined the HCC tumors and adjacent tissues from 19 patients diagnosed with HCC. We find that the liver tissues from HCC patients with capsule invasion presented higher alpha diversity at the genus level than those without. The bacterial compositions in liver tissues of HCC patients at stage II differed from those at stage I and Advanced, respectively. Metagenomic profiling revealed that order Actinomycetales was enriched in the HCC patients at advanced stages. Order Lactobacillales, family Veillonellaceae, genera Rhodobacter and Megasphaera are enriched in tumors of HCC patients, whereas genus Pseudochrobactrum is enriched in the adjacent tissues from HCC patients. An increased abundance of class Actinobacteria and order Actinomycetales is observed in the HCC patients with cirrhosis. In contrast, phylum Firmicutes, classes Clostridia and Betaproteobacteria, and order Clostridiales are enriched in those without cirrhosis. The presence of various types of bacterial 16S rRNAs in HCC tumors and adjacent tissues indicates the presence of various bacterial communities therein. Our study provides information about differentially abundant intrahepatic bacteria in patients with HCC. The differences found may support possible diagnostic and personalized therapeutic implications for HCC.}, }
@article {pmid39579348, year = {2024}, author = {Ramos-Barbero, MD and Aldeguer-Riquelme, B and Viver, T and Villamor, J and Carrillo-Bautista, M and López-Pascual, C and Konstantinidis, KT and Martínez-García, M and Santos, F and Rossello-Mora, R and Antón, J}, title = {Experimental evolution at ecological scales allows linking of viral genotypes to specific host strains.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39579348}, issn = {1751-7370}, support = {PID2021-126114NB-C41//Spanish Ministry of Science and Innovation projects METACIRCLE/ ; CIPROM/2021/006//European Regional Development Fund/ ; }, mesh = {*Genotype ; Metagenomics ; Genome, Viral ; Ponds/virology/microbiology ; Metagenome ; }, abstract = {Viruses shape microbial community structure and activity through the control of population diversity and cell abundances. Identifying and monitoring the dynamics of specific virus-host pairs in nature is hampered by the limitations of culture-independent approaches such as metagenomics, which do not always provide strain-level resolution, and culture-based analyses, which eliminate the ecological background and in-situ interactions. Here, we have explored the interaction of a specific "autochthonous" host strain and its viruses within a natural community. Bacterium Salinibacter ruber strain M8 was spiked into its environment of isolation, a crystallizer pond from a coastal saltern, and the viral and cellular communities were monitored for one month using culture, metagenomics, and microscopy. Metagenome sequencing indicated that the M8 abundance decreased sharply after being added to the pond, likely due to forces other than viral predation. However, the presence of M8 selected for two species of a new viral genus, Phoenicisalinivirus, for which 120 strains were isolated. During this experiment, an assemblage of closely related viral genomic variants was replaced by a single population with the ability to infect M8, a scenario which was compatible with the selection of a genomic variant from the rare biosphere. Further analysis implicated a viral genomic region putatively coding for a tail fiber protein to be responsible for M8 specificity. Our results indicate that low abundance viral genotypes provide a viral seed bank that allows for a highly specialized virus-host response within a complex ecological background.}, }
@article {pmid39578945, year = {2025}, author = {Li, D and Zhi, J and Ye, J and Yue, W and Yang, Y}, title = {Influence of different diet categories on gut bacterial diversity in Frankliniella occidentalis.}, journal = {Environmental entomology}, volume = {54}, number = {1}, pages = {119-129}, doi = {10.1093/ee/nvae117}, pmid = {39578945}, issn = {1938-2936}, support = {[2016] 5802//Guizhou International Science and Technology Cooperation Base/ ; }, mesh = {Diet ; Gastrointestinal Microbiome ; Metagenome ; Phaseolus ; Rosa ; Sequence Analysis, DNA ; *Thysanoptera/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {The microbial composition of insect guts is typically influenced by the type of food consumed, and conversely, these microbes influence the food habits of insects. Western flower thrips (WFT; Frankliniella occidentalis) is an invasive pest with a wide range of hosts, including vegetables and horticultural crops. To elucidate variations in gut bacteria among WFT feeding on rose (Rosa rugosa) flowers (FF), kidney bean (Phaseolus vulgaris) pods (PF), and kidney bean leaves (LF), we collected adult guts and extracted DNA for 16S ribosomal RNA gene sequencing of microbial communities. The results revealed that the FF population had the highest number of annotations. Alpha diversity analysis revealed that the Chao and Ace indexes were the greatest in the PF population, indicating a higher abundance of gut bacteria. Moreover, the Simpson index was the highest in the FF population, indicating that gut bacterial diversity was the highest in the FF population. Comparison of species composition demonstrated that Proteobacteria dominated all 3 populations at the phylum level, with Actinobacteria being the subdominant phylum. At the genus level, Stenotrophomonas was the dominant bacteria in the PF and LF populations, whereas Rosenbergiella was dominant in the FF population. KEGG pathway annotation predicted that the gut bacteria of adult WFT were mainly involved in carbohydrate and amino acid metabolism. Our results revealed that the diversity and composition of WFT gut microbiota are influenced by diet, offering evidence for future studies on the ecological adaptability of WFT and the mechanisms underlying the interaction between gut microbiota and host.}, }
@article {pmid39578870, year = {2024}, author = {Wang, Y and Chen, X and Huws, SA and Xu, G and Li, J and Ren, J and Xu, J and Guan, LL and Yao, J and Wu, S}, title = {Ileal microbial microbiome and its secondary bile acids modulate susceptibility to nonalcoholic steatohepatitis in dairy goats.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {247}, pmid = {39578870}, issn = {2049-2618}, mesh = {Animals ; *Non-alcoholic Fatty Liver Disease/microbiology ; *Goats ; *Bile Acids and Salts/metabolism ; *Gastrointestinal Microbiome ; *Ileum/microbiology ; *Liver/metabolism ; Mice ; Bacteria/classification/isolation &amp; purification/genetics ; Disease Susceptibility ; Goat Diseases/microbiology ; Disease Models, Animal ; Female ; }, abstract = {BACKGROUND: Liver damage from nonalcoholic steatohepatitis (NASH) presents a significant challenge to the health and productivity of ruminants. However, the regulatory mechanisms behind variations in NASH susceptibility remain unclear. The gut‒liver axis, particularly the enterohepatic circulation of bile acids (BAs), plays a crucial role in regulating the liver diseases. Since the ileum is the primary site for BAs reabsorption and return to the liver, we analysed the ileal metagenome and metabolome, liver and serum metabolome, and liver single-nuclei transcriptome of NASH-resistant and susceptible goats together with a mice validation model to explore how ileal microbial BAs metabolism affects liver metabolism and immunity, uncovering the key mechanisms behind varied NASH pathogenesis in dairy goats.<br><br>RESULTS: In NASH goats, increased total cholesterol (TC), triglyceride (TG), and primary BAs and decreased secondary BAs in the liver and serum promoted hepatic fat accumulation. Increased ileal Escherichia coli, Erysipelotrichaceae bacterium and Streptococcus pneumoniae as well as proinflammatory compounds damaged ileal histological morphology, and increased ileal permeability contributes to liver inflammation. In NASH-tolerance (NASH-T) goats, increased ursodeoxycholic acid (UDCA), isodeoxycholic acid (isoDCA) and isolithocholic acid (isoLCA) in the liver, serum and ileal contents were attributed to ileal secondary BAs-producing bacteria (Clostridium, Bifidobacterium and Lactobacillus) and key microbial genes encoding enzymes. Meanwhile, decreased T-helper 17 (TH17) cells and increased regulatory T (Treg) cells proportion were identified in both liver and ileum of NASH-T goats. To further validate whether these key BAs affected the progression of NASH by regulating the proliferation of TH17 and Treg cells, the oral administration of bacterial UDCA, isoDCA and isoLCA to a high-fat diet-induced NASH mouse model confirmed the amelioration of NASH through the TH17 cell differentiation/IL-17 signalling/PPAR signalling pathway by these bacterial secondary BAs.<br><br>CONCLUSION: This study revealed the roles of ileal microbiome and its secondary BAs in resilience and susceptibility to NASH by affecting the hepatic Treg and TH17 cells proportion in dairy goats. Bacterial UDCA, isoDCA and isoLCA were demonstrated to alleviate NASH and could be novel postbiotics to modulate and improve the liver health in ruminants. Video Abstract.}, }
@article {pmid39578464, year = {2024}, author = {Nunn, BL and Timmins-Schiffman, E and Mudge, MC and Plubell, DL and Chebli, G and Kubanek, J and Riffle, M and Noble, WS and Harvey, E and Nunn, TA and Rynearson, T and Huntemann, M and LaButti, K and Foster, B and Foster, B and Roux, S and Palaniappan, K and Mukherjee, S and Reddy, TBK and Daum, C and Copeland, A and Chen, IA and Ivanova, NN and Kyrpides, NC and Glavina Del Rio, T and Eloe-Fadrosh, EA}, title = {Microbial Metagenomes Across a Complete Phytoplankton Bloom Cycle: High-Resolution Sampling Every 4 Hours Over 22 Days.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1270}, pmid = {39578464}, issn = {2052-4463}, support = {R21ES034337-01//U.S. Department of Health &amp; Human Services | NIH | National Institute of Environmental Health Sciences (NIEHS)/ ; F31 ES032733/ES/NIEHS NIH HHS/United States ; 2041497//NSF | BIO | Division of Integrative Organismal Systems (IOS)/ ; IOS 2041497//NSF | BIO | Division of Integrative Organismal Systems (IOS)/ ; R21 ES034337/ES/NIEHS NIH HHS/United States ; }, mesh = {*Phytoplankton/genetics/growth &amp; development ; *Metagenome ; *Bacteria/genetics/growth &amp; development/classification ; *Archaea/genetics ; Eutrophication ; Microbiota ; Viruses/genetics/growth &amp; development ; }, abstract = {In May and June of 2021, marine microbial samples were collected for DNA sequencing in East Sound, WA, USA every 4 hours for 22 days. This high temporal resolution sampling effort captured the last 3 days of a Rhizosolenia sp. bloom, the initiation and complete bloom cycle of Chaetoceros socialis (8 days), and the following bacterial bloom (2 days). Metagenomes were completed on the time series, and the dataset includes 128 size-fractionated microbial samples (0.22-1.2 µm), providing gene abundances for the dominant members of bacteria, archaea, and viruses. This dataset also has time-matched nutrient analyses, flow cytometry data, and physical parameters of the environment at a single point of sampling within a coastal ecosystem that experiences regular bloom events, facilitating a range of modeling efforts that can be leveraged to understand microbial community structure and their influences on the growth, maintenance, and senescence of phytoplankton blooms.}, }
@article {pmid39577778, year = {2025}, author = {Chen, Y and Huang, M and Fu, Y and Gao, T and Gan, Z and Meng, F}, title = {Construction of polylactic acid plastisphere microbiota for enhancing nitrate reduction in denitrification biofilters.}, journal = {Bioresource technology}, volume = {417}, number = {}, pages = {131853}, doi = {10.1016/j.biortech.2024.131853}, pmid = {39577778}, issn = {1873-2976}, mesh = {*Denitrification ; *Polyesters/metabolism/chemistry ; *Nitrates/metabolism ; *Biofilms ; *Microbiota ; Bioreactors/microbiology ; Filtration/methods ; Water Purification/methods ; Biodegradation, Environmental ; }, abstract = {Developing methods for reusing biodegradable plastics, like polylactic acid (PLA) straws, is highly needed. Here, PLAs were applied to substitute traditional commercial ceramic media (CCM) in denitrification biofilters. During long-term operation, replacing CCM with PLA significantly enhanced nitrate removal efficiency from 32.68-54.39 % to 41.64-66.26 %. Ammonia nitrogen effluent maintained below 0.5 mg/L in all reactors. PLA plastisphere shaped unique microbial communities, i.e., denitrifying bacteria Bacillus, Pseudomonas and Acidovorax preferred to inhabit or degrade PLA. Compared to CCM biofilms, PLA diminished the importance of stochastic process in biofilm assembly of PLA plastisphere. Metagenomic sequencing suggested that PLA biofilms possessed greater metabolic capabilities of denitrification and glycolysis compared to CCM. Additionally, Bacillus strain P01 isolated from PLA plastisphere demonstrated strong PLA depolymerization. Overall, this study revealed that PLA serves as carbon source and biofilm carrier, offering a promising approach to integrating plastic reuse with wastewater treatment.}, }
@article {pmid39577582, year = {2024}, author = {Mukherjee, S and Bhattacharya, R and Sarkar, O and Islam, S and Biswas, SR and Chattopadhyay, A}, title = {Gut microbiota perturbation and subsequent oxidative stress in gut and kidney tissues of zebrafish after individual and combined exposure to inorganic arsenic and fluoride.}, journal = {The Science of the total environment}, volume = {957}, number = {}, pages = {177519}, doi = {10.1016/j.scitotenv.2024.177519}, pmid = {39577582}, issn = {1879-1026}, mesh = {Animals ; *Zebrafish ; *Gastrointestinal Microbiome/drug effects ; *Oxidative Stress/drug effects ; *Arsenic/toxicity ; *Kidney/drug effects ; *Fluorides/toxicity ; *Water Pollutants, Chemical/toxicity ; }, abstract = {Chronic exposure to inorganic arsenic (iAs) and fluoride (F) affect gut health and potentially damage organs. The present study investigates the interplay between gut bacteria and oxidative stress (measured by MDA level, GSH level, catalase activity, Nrf2 translocation and expression) in zebrafish exposed to F (NaF 15 ppm) and As (As2O3 50 ppb) alone or in combination. Combined exposure to As and F reduced gut bacterial alteration and imposed less oxidative stress compared to F- exposure alone. V3-V4 metagenomic sequencing revealed Pseudomonas, Aeromonas and Plesiomonas genera dominated in As or F treated groups while As+F treated group was enriched in beneficial Lactococcus and Streptococcus genera. Functional KEGG analysis demonstrated treatment-specific changes in bacterial metabolism, host organismal systems, human diseases, as well as cellular processes of microbial community were significantly affected. When Aeromonas sp. isolated from F-treated fish gut, tagged with GFP-vector and fed (~3.2 × 10[6] CFU/mL) to untreated fish, induced oxidative stress in gut and kidney. Gut bacteria were found to both increase and mitigate iAs or F-toxicity, whereas As+F treatment promoted a protective response. Correlation analysis between gut microbial community at genus level and oxidative stress parameters of gut and kidney, showed Aeromonas and Plesiomonas genera are strongly correlated with oxidative stress (r = 0.5-0.9, p˂0.05). This study identifies microbiome biomarkers of iAs and F toxicity on gut-kidney axis.}, }
@article {pmid39577368, year = {2025}, author = {Yang, L and Yao, B and Zhang, S and Yang, Y and Wang, G and Pan, H and Zeng, X and Qiao, S}, title = {Division mechanism of labor in Diqing Tibetan Pigs gut microbiota for dietary fiber efficiently utilization.}, journal = {Microbiological research}, volume = {290}, number = {}, pages = {127977}, doi = {10.1016/j.micres.2024.127977}, pmid = {39577368}, issn = {1618-0623}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Dietary Fiber/metabolism ; Swine ; *Animal Feed ; *Feces/microbiology ; Tibet ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Metagenomics ; Xylose/metabolism ; Glycoside Hydrolases/metabolism ; Lactobacillus/metabolism/genetics ; }, abstract = {The Diqing Tibetan (TP) pig is an roughage tolerance breed that inhabits an area with the highest altitude distribution in the world and can be maintained on a diet containing 90 % forage material in confined production systems. Our results showed that TP pigs had a strong capability for high-efficiency utilization of arabinose and xylose. Metagenomic analysis revealed that the secretion of carbohydrate esterases was mainly undertaken by fecal strains of Microbacterium, Alistipes, Acinetobacter, and Faecalibacterium, while Microbacterium, Prevotella, Turicibacter, Lactobacillus, Clostridium, and Streptococcus were responsible for most of the secretion of glycoside hydrolases. Then, a brand new species, which was named Microbacterium sp. Qiao 01 was captured and appeared to have the highest fiber utilization ability in vitro, degrading 36.54 % of the neutral detergent fiber in corn stover. Our results provide strong evidence that efficient utilization of dietary fiber by TP pigs is due to the emergence of highly specialized microbial strategies in the gut. Microorganisms showed preferences and a clear division of labor in the degradation process of dietary fiber. This study has great practical significance for improving the utilization efficiency of livestock feed and alleviating the tension of food insecurity.}, }
@article {pmid39577267, year = {2025}, author = {Ngo, C and Morrell, JM and Tummaruk, P}, title = {Boar semen microbiome: Insights and potential implications.}, journal = {Animal reproduction science}, volume = {272}, number = {}, pages = {107647}, doi = {10.1016/j.anireprosci.2024.107647}, pmid = {39577267}, issn = {1873-2232}, mesh = {Animals ; *Semen/microbiology ; Swine/microbiology/physiology ; Male ; *Microbiota ; Semen Analysis/veterinary ; Bacteria/classification/isolation &amp; purification/genetics ; }, abstract = {The pioneers of next-generation sequencing technology and bioinformatic analyses initiated a new era in microbiology research by offering profound insights into bacterial microbiome communities. In the pig farming sector, while considerable attention has been devoted to the gut microbiome and the microbiome of the female reproductive tract, research on the microbiome of boar semen remains limited. Nonetheless, published studies have provided valuable insights, serving as important references and sparking ideas for further investigations into the seminal microbiome. Factors such as breed, seasons, feed additives, hygiene management, and antibiotic use are believed to exert a notable influence on the diversity and richness of bacterial genera in the boar seminal microbiome, potentially affecting semen quality. Moreover, current shifts towards sustainability in the swine industry, coupled with global guidelines concerning the prudent use of antibiotics in stored boar semen for artificial insemination, underscore the need for insights into factors influencing seminal bacteria. The objective of this review is to elucidate the current understanding of boar bacterial contents using conventional culture methods, as well as the boar seminal microbiome through metagenomics and bioinformatics. It also aims to review specific microbiome communities, such as those in the reproductive tract and gut, and their connections to semen quality. In addition, strategic enhancements for processing boar semen doses through alternative methods to improve seminal quality are proposed.}, }
@article {pmid39577061, year = {2024}, author = {Mahanty, S and Pillay, K and Hardouin, EA and Andreou, D and Cvitanović, M and Darbha, GK and Mandal, S and Chaudhuri, P and Majumder, S}, title = {Whispers in the mangroves: Unveiling the silent impact of potential toxic metals (PTMs) on Indian Sundarbans fungi.}, journal = {Marine pollution bulletin}, volume = {209}, number = {Pt B}, pages = {117233}, doi = {10.1016/j.marpolbul.2024.117233}, pmid = {39577061}, issn = {1879-3363}, mesh = {*Wetlands ; *Environmental Monitoring ; *Metals, Heavy/analysis/toxicity ; India ; *Water Pollutants, Chemical/analysis/toxicity ; *Fungi ; Geologic Sediments/chemistry ; Biodiversity ; }, abstract = {This study investigates sediment samples from the Indian Sundarbans' mangrove habitat, where most samples were alkaline and hypersaline, except for one acidic sample. Elemental analysis revealed poor sediment quality, with elevated Enrichment Factors (2.20-9.7), Geo-accumulation indices (-2.19-1.19), Contamination Factors (0.61-3.18), and Pollution Load Indices (1.04-1.32). Toxic metal ions, including Pb, Cu, Ni, Cd, Zn, and Cr, were identified as key contributors to compromised sediment quality. These metals inhibit crucial sediment enzymes, such as CMC-cellulase, β-glucosidase, aryl sulfatase, urease, and phosphatases, essential for nutrient cycling and organic matter decomposition. A negative correlation was found between heavy metals and biodiversity, as indicated by the Shannon index, and a similar trend was observed with fungal load. The study highlights the adverse effects of persistent trace metals on the fungal community, potentially disrupting the mangrove ecosystem and suggests using manglicolous fungi as biological indicators of environmental health.}, }
@article {pmid39576476, year = {2024}, author = {Zabolotneva, AA and Laskina, TA and Kharchev, DN and Shestopalov, AV}, title = {Effects of a Short-Term High-Fat Diet on Microbiota Biodiversity of the Small and Large Intestines of C57BL/6SPF Mice.}, journal = {Bulletin of experimental biology and medicine}, volume = {178}, number = {1}, pages = {17-23}, pmid = {39576476}, issn = {1573-8221}, mesh = {Animals ; *Diet, High-Fat/adverse effects ; Mice ; *Mice, Inbred C57BL ; *Gastrointestinal Microbiome/genetics ; Male ; *Intestine, Small/microbiology/metabolism ; *Intestine, Large/microbiology ; Lipid Metabolism ; Biodiversity ; Blood Glucose/metabolism ; }, abstract = {Long-term high-fat diet (HFD) promotes the formation of excess body weight and disorders of lipid metabolism and causes persistent dysbiotic changes in the intestinal microbial community. Changes in eating behavior, endocrine and immune functions of the host are associated with changes in the structure and functional activity of microbial communities. Short-term HFD may also influence the composition and function of the intestinal microbiota, but data on this issue are limited, and most papers are focused on the study of the large intestinal microbiota. The present study examined the effect of short-term HFD (4 weeks) on the structure of microbial communities in the small and large intestines of 24 mice. High-throughput metagenomic sequencing was performed on 48 samples of small and large intestine contents. It was revealed that short-term HFD in mice contributed to impaired glucose tolerance and increased the diversity of microbiota in the colon, but not of the small intestine, and also led to changes in the representation of certain microbial taxa (in particular Tenericutes and Verrucomicrobia). Furthermore, short-term HFD increased blood glucose levels compared to control mice (fed a normal diet), but did not affect lipid metabolism. The results will help to assess the contribution of environmental factors to the structure of microbial communities of the small and large intestines and may also be useful for correcting dysbiotic conditions, including when prescribing therapeutic diets (for example, a ketogenic diet).}, }
@article {pmid39574252, year = {2024}, author = {Crombez, L and Descamps, A and Hirmz, H and Lambert, M and Calewaert, J and Siluk, D and Markuszewski, M and Biesemans, M and Petrella, G and Cicero, D and Cesaroni, S and Stokowy, T and Gerber, GK and Tataru, C and Naumovski, P and Elewaut, D and Van De Looverbosch, C and Calders, P and Van Den Noortgate, N and De Spiegeleer, B and Wynendaele, E and De Spiegeleer, A}, title = {The Saliva and Muscle Study (SaMu): Rationale and Protocol for Associations between Salivary Microbiome and Accelerated Muscle Ageing.}, journal = {The Journal of frailty &amp; aging}, volume = {13}, number = {4}, pages = {331-340}, doi = {10.14283/jfa.2024.75}, pmid = {39574252}, issn = {2260-1341}, mesh = {Humans ; *Saliva/microbiology ; *Sarcopenia/microbiology ; Aged ; Cross-Sectional Studies ; Male ; Female ; Muscle Strength/physiology ; Aging/physiology ; Microbiota/physiology ; Muscle, Skeletal/microbiology ; Aged, 80 and over ; }, abstract = {BACKGROUND: The gut microbiome is recognized as a pivotal factor in the pathophysiology of sarcopenia-a condition marked by the accelerated loss of muscle strength, mass and function with ageing. Despite this well-known gut-muscle axis, the potential links between other microbial ecosystems and sarcopenia remain largely unexplored. The oral microbiome has been linked to various age-related health conditions such as rheumatoid arthritis and colorectal cancer. However, its potential association with sarcopenia is unknown. The Saliva and Muscle (SaMu) study seeks to address this knowledge gap.<br><br>METHODS: The SaMu study comprises three sequential phases. In phase 1, a cross-sectional analysis will be conducted on a cohort of 200 individuals aged 70 years or older to examine the relationship between salivary microbiome and sarcopenia status. Participants will be recruited in the three main places of living: general community, assisted living facilities and nursing homes. The salivary microbiome composition will be evaluated utilizing shotgun metagenomics sequencing, while sarcopenia status will be determined through muscle mass (determined by whole-body bioelectrical impedance analysis and calf circumference), muscle strength (grip strength and the 5-times-sit-to-stand test) and physical performance (usual walking speed). In addition to investigating the microbiome composition, the study aims to elucidate microbiome functions by exploring potential omic associations with sarcopenia. To achieve this, salivary proteomics, metabolomics and quorum sensing peptidomics will be performed. Covariates that will be measured include clinical variables (sociodemographic factors, health status, health-related behaviours, oral health and quality of life) as well as blood variables (immune profiling, hormones, kidney and liver function, electrolytes and haematocrit). In phase 2, an in-depth mechanistic analysis will be performed on an envisaged subcohort of 50 participants. This analysis will explore pathways in muscle tissue using histology, genomics and transcriptomics, focusing on (maximal) 25 healthy older adults and (maximal) 25 with severe sarcopenia. Phase 3 involves a two-year clinical follow-up of the initial participants from the cross-sectional analysis, along with a resampling of blood and saliva. Additionally, secondary outcomes like falls, hospitalization and mortality will be examined.<br><br>DISCUSSION: Using a salivary multi-omics approach, SaMu primarily aims to clarify the associations between the oral microbiome and sarcopenia. SaMu is expected to contribute to the discovery of predictive biomarkers of sarcopenia as well as to the identification of potential novel targets to prevent/tackle sarcopenia. This study-protocol is submitted for registration at the ISRCTN registry.}, }
@article {pmid39574009, year = {2024}, author = {Kim, S and Thapa, I and Ali, H}, title = {A novel computational approach for the mining of signature pathways using species co-occurrence networks in gut microbiomes.}, journal = {BMC microbiology}, volume = {24}, number = {Suppl 1}, pages = {490}, pmid = {39574009}, issn = {1471-2180}, mesh = {*Gastrointestinal Microbiome/genetics ; *Inflammatory Bowel Diseases/microbiology ; Humans ; *Computational Biology/methods ; *Metagenome ; Bacteria/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Metagenomics/methods ; Data Mining ; }, abstract = {BACKGROUND: Advances in metagenome sequencing data continue to enable new methods for analyzing biological systems. When handling microbial profile data, metagenome sequencing has proven to be far more comprehensive than traditional methods such as 16s rRNA data, which rely on partial sequences. Microbial community profiling can be used to obtain key biological insights that pave the way for more accurate understanding of complex systems that are critical for advancing biomedical research and healthcare. However, such attempts have mostly used partial or incomplete data to accurately capture those associations.<br><br>METHODS: This study introduces a novel computational approach for the identification of co-occurring microbial communities using the abundance and functional roles of species-level microbiome data. The proposed approach is then used to identify signature pathways associated with inflammatory bowel disease (IBD). Furthermore, we developed a computational pipeline to identify microbial species co-occurrences from metagenome data at various granularity levels.<br><br>RESULTS: When comparing the IBD group to a control group, we show that certain co-occurring communities of species are enriched for potential pathways. We also show that the identified co-occurring microbial species operate as a community to facilitate pathway enrichment.<br><br>CONCLUSIONS: The obtained findings suggest that the proposed network model, along with the computational pipeline, provide a valuable analytical tool to analyze complex biological systems and extract pathway signatures that can be used to diagnose certain health conditions.}, }
@article {pmid39572861, year = {2024}, author = {Ding, Y and Ma, RA and Zhang, R and Zhang, H and Zhang, J and Li, S and Zhang, SY}, title = {Increased antibiotic resistance gene abundance linked to intensive bacterial competition in the phyllosphere across an elevational gradient.}, journal = {Environmental microbiology reports}, volume = {16}, number = {6}, pages = {e70042}, pmid = {39572861}, issn = {1758-2229}, support = {52270198//National Natural Science Foundation of China/ ; }, mesh = {*Bacteria/genetics/classification/isolation &amp; purification ; *Phylogeny ; *Microbiota/genetics ; Biodiversity ; Metagenomics ; Genes, Bacterial/genetics ; Anti-Bacterial Agents/pharmacology ; Ecosystem ; Altitude ; Drug Resistance, Bacterial/genetics ; }, abstract = {Antibiotic resistance genes (ARGs) are ancient and widespread in natural habitats, providing survival advantages for microbiomes under challenging conditions. In mountain ecosystems, phyllosphere bacterial communities face multiple stress conditions, and the elevational gradients of mountains represent crucial environmental gradients for studying biodiversity distribution patterns. However, the distribution patterns of ARGs in the phyllosphere along elevational gradients, and their correlation with bacterial community structures, remain poorly understood. Here, we applied metagenomic analyses to investigate the abundance and diversity of ARGs in 88 phyllosphere samples collected from Mount Tianmu, a national natural reserve. Our results showed that the abundance of ARGs in the phyllosphere increased along elevational gradients and was dominated by multidrug resistance and efflux pumps. The composition of bacterial communities, rather than plant traits or abiotic factors, significantly affected ARG abundance. Moreover, increased ARG abundance was correlated with greater phylogenetic overdispersion and a greater proportion of negative associations in the bacterial co-occurrence networks, suggesting that bacterial competition primarily shapes phyllosphere resistomes. These findings constitute a major advance in the biodiversity of phyllosphere resistomes along elevations, emphasizing the significant impact of bacterial community structure and assembly on ARG distribution, and are essential for understanding the emergence of ARGs.}, }
@article {pmid39572788, year = {2024}, author = {Pereira, FC and Ge, X and Kristensen, JM and Kirkegaard, RH and Maritsch, K and Szamosvári, D and Imminger, S and Seki, D and Shazzad, JB and Zhu, Y and Decorte, M and Hausmann, B and Berry, D and Wasmund, K and Schintlmeister, A and Böttcher, T and Cheng, JX and Wagner, M}, title = {The Parkinson's disease drug entacapone disrupts gut microbiome homoeostasis via iron sequestration.}, journal = {Nature microbiology}, volume = {9}, number = {12}, pages = {3165-3183}, pmid = {39572788}, issn = {2058-5276}, support = {R01AI141439//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R01EB032391//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R01 AI141439/AI/NIAID NIH HHS/United States ; R01 EB032391/EB/NIBIB NIH HHS/United States ; Z383-B//Austrian Science Fund (Fonds zur F&#xf6;rderung der Wissenschaftlichen Forschung)/ ; ZK-57//Austrian Science Fund (Fonds zur F&#xf6;rderung der Wissenschaftlichen Forschung)/ ; S10 OD024993/OD/NIH HHS/United States ; 10.55776; COE 7//Austrian Science Fund (Fonds zur F&#xf6;rderung der Wissenschaftlichen Forschung)/ ; 10.55776 COE 7//Austrian Science Fund (Fonds zur F&#xf6;rderung der Wissenschaftlichen Forschung)/ ; R35GM136223//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; R35 GM136223/GM/NIGMS NIH HHS/United States ; }, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Iron/metabolism ; *Parkinson Disease/microbiology/metabolism/drug therapy ; *Feces/microbiology ; *Catechols/pharmacology/metabolism ; *Nitriles/pharmacology ; Homeostasis/drug effects ; Bacteria/genetics/drug effects/metabolism/classification/isolation &amp; purification ; Metagenomics ; Antiparkinson Agents/pharmacology ; }, abstract = {Many human-targeted drugs alter the gut microbiome, leading to implications for host health. However, the mechanisms underlying these effects are not well known. Here we combined quantitative microbiome profiling, long-read metagenomics, stable isotope probing and single-cell chemical imaging to investigate the impact of two widely prescribed drugs on the gut microbiome. Physiologically relevant concentrations of entacapone, a treatment for Parkinson's disease, or loxapine succinate, used to treat schizophrenia, were incubated ex vivo with human faecal samples. Both drugs significantly impact microbial activity, more so than microbial abundance. Mechanistically, entacapone can complex and deplete available iron resulting in gut microbiome composition and function changes. Microbial growth can be rescued by replenishing levels of microbiota-accessible iron. Further, entacapone-induced iron starvation selected for iron-scavenging gut microbiome members encoding antimicrobial resistance and virulence genes. These findings reveal the impact of two under-investigated drugs on whole microbiomes and identify metal sequestration as a mechanism of drug-induced microbiome disturbance.}, }
@article {pmid39572621, year = {2024}, author = {Rabenhorst, SHB and Ferrasi, AC and Barboza, MMO and Melo, VMM}, title = {Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {28890}, pmid = {39572621}, issn = {2045-2322}, support = {07939716/2020//Funda&#xe7;&#xe3;o Cearense de Apoio ao Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico/ ; }, mesh = {Humans ; *Helicobacter pylori/pathogenicity/genetics ; *Helicobacter Infections/microbiology/pathology ; *Stomach Neoplasms/microbiology/pathology ; *Gastritis/microbiology/pathology ; Virulence ; *Gastric Mucosa/microbiology/pathology ; Male ; Female ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Aged ; Metaplasia/microbiology ; Adult ; Gastrointestinal Microbiome ; }, abstract = {Helicobacter pylori infection is a major risk factor for gastric adenocarcinomas. In the case of the intestinal subtype, chronic gastritis and intestinal metaplasia are well-known sequential steps in carcinogenesis. H. pylori has high genetic diversity that can modulate virulence and pathogenicity in the human host as a cag Pathogenicity Island (cagPAI). However, bacterial gene combinations do not always explain the clinical presentation of the disease, indicating that other factors associated with H. pylori may play a role in the development of gastric disease. In this context, we characterized the microbial composition of patients with chronic gastritis (inactive and active), intestinal metaplasia, and gastric cancer as well as their potential association with H. pylori. To this end, 16 S rRNA metagenomic analysis was performed on gastric mucosa samples from patients with different types of lesions and normal gastric tissues. Our main finding was that H. pylori virulence status can contribute to significant differences in the constitution of the gastric microbiota between the sequential steps of the carcinogenesis cascade. Differential microbiota was observed in inactive and active gastritis dependent of the H. pylori presence and status (p = 0.000575). Pseudomonades, the most abundant order in the gastritis, was associated the presence of non-virulent H. pylori in the active gastritis. Notably, there are indicator genera according to H. pylori status that are poorly associated with diseases and provide additional evidence that the microbiota, in addition to H. pylori, is relevant to gastric carcinogenesis.}, }
@article {pmid39572587, year = {2024}, author = {Yang, S and Zheng, J and Mao, H and Vinitchaikul, P and Wu, D and Chai, J}, title = {Multiomics of yaks reveals significant contribution of microbiome into host metabolism.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {133}, pmid = {39572587}, issn = {2055-5008}, mesh = {Animals ; Cattle ; *Rumen/microbiology ; *Metagenomics/methods ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Gastrointestinal Microbiome ; Metabolomics/methods ; Methane/metabolism ; Animal Feed ; Metabolome ; Microbiota ; Multiomics ; }, abstract = {An intensive feeding system might improve the production cycle of yaks. However, how intensive feeding system contributes to yak growth is unclear. Here, multi-omics, including rumen metagenomics, rumen and plasma metabolomics, were performed to classify the regulatory mechanisms of intensive feeding system on yaks. Increased growth performance were observed. Rumen metagenomics revealed that Clostridium, Methanobrevibacter, Piromyces and Anaeromyces increased in the intensively fed yaks, contributing to amino acid and carbohydrate metabolism. The grazing yaks had more cellulolytic microbes. These microbiomes were correlated with the pathways of "Alanine aspartate and glutamate metabolism" and "Pyruvate metabolism". Intensive feeding increased methane degradation functions, while grazing yaks had higher methyl metabolites associated with methane production. These rumen microbiomes and their metabolites resulted in changes in plasma metabolome, finally influencing yaks' growth. Thus, an intensive feeding system altered the rumen microbiome and metabolism as well as host metabolism, resulting in improvements of yak growth.}, }
@article {pmid39571816, year = {2024}, author = {Arros, P and Palma, D and Gálvez-Silva, M and Gaete, A and Gonzalez, H and Carrasco, G and Coche, J and Perez, I and Castro-Nallar, E and Galbán, C and Varas, MA and Campos, M and Acuña, J and Jorquera, M and Chávez, FP and Cambiazo, V and Marcoleta, AE}, title = {Life on the edge: Microbial diversity, resistome, and virulome in soils from the union glacier cold desert.}, journal = {The Science of the total environment}, volume = {957}, number = {}, pages = {177594}, doi = {10.1016/j.scitotenv.2024.177594}, pmid = {39571816}, issn = {1879-1026}, mesh = {*Soil Microbiology ; Antarctic Regions ; *Ice Cover/microbiology ; *Desert Climate ; *Bacteria/genetics ; *Microbiota ; Soil/chemistry ; Biodiversity ; }, abstract = {The high-latitude regions of Antarctica remain among the most remote, extreme, and least explored areas on Earth. Still, microbial life has been reported in these environments, with limited information on their genetic properties and functional capabilities. Although diverse autochthonous multidrug-resistant bacteria were found in Antarctic Peninsula soils, posing whether these soils could act as a source of resistance determinants that could emerge among pathogens, we still lack information regarding the resistome of areas closer to the South Pole. Moreover, no previous studies have evaluated the pathogenic potential of microbes inhabiting Antarctic soils. In this work, we combined metagenomic and culture-dependent approaches to investigate the microbial diversity, resistome, virulome, and mobile genetic elements (MGEs) in soils from Union Glacier, a cold desert in West Antarctica. Despite the extreme conditions, several bacterial phyla were found, predominating Actinomycetota and Pseudomonadota, with limited archaeal and fungal taxa. Contrastive with Ecology Glacier soils from King George Island, the Union Glacier soil bacterial community is significantly less diverse, mainly attributed to scarce moisture. We recovered >80 species-level representative genomes (SRGs) of predominant bacteria and an ammonia-oxidating nitrogen- and carbon-fixing archaeon from a novel species of Nitrosocosmicus. Several resistance and virulence genes were found in Union Glacier soils, similar to those in other Antarctic cold desert areas but significantly distinct from those observed in maritime Antarctica and other non-cryosphere biomes. Furthermore, we characterized bacterial isolates resistant to up to 24 clinical antibiotics, mainly Pseudomonas, Arthrobacter, Plantibacter, and Flavobacterium. Moreover, some isolates produced putative virulence factors, including siderophores, pyocyanins, and exoenzymes with hemolytic, lecithinase, protease, and DNAse activity. This evidence uncovers a largely unexplored resistome and virulome hosted by deep Antarctica's soil microbial communities and the presence of bacteria with pathogenic potential, highlighting the relevance of One Health approaches for environmental surveillance in this continent.}, }
@article {pmid39571716, year = {2025}, author = {González-Parra, JA and Barrera-Conde, M and Kossatz, E and Veza, E and de la Torre, R and Busquets-Garcia, A and Robledo, P and Pizarro, N}, title = {Microbiota and social behavior alterations in a mouse model of down syndrome: Modulation by a synbiotic treatment.}, journal = {Progress in neuro-psychopharmacology &amp; biological psychiatry}, volume = {136}, number = {}, pages = {111200}, doi = {10.1016/j.pnpbp.2024.111200}, pmid = {39571716}, issn = {1878-4216}, mesh = {Animals ; *Down Syndrome/psychology/microbiology ; Female ; Male ; *Gastrointestinal Microbiome/physiology ; *Synbiotics/administration &amp; dosage ; Mice ; *Social Behavior ; Disease Models, Animal ; Sex Characteristics ; }, abstract = {Sex differences in the composition and functionality of gut microbiota are an emerging field of interest in neurodevelopmental disorders, as they may help in understanding the phenotypic disparities between males and females. This study aimed to characterize sex-related specific alterations in gut microbiota composition in a mouse model of Down syndrome (Ts65Dn mice, TS mice) through the sequencing of the PCR-amplified 16S ribosomal DNA fraction. Moreover, it intended to examine whether the modulation of gut microbiota by the administration of a synbiotic (SYN) treatment would be beneficial for the behavioral alterations observed in male and female TS mice. Our results show that male, but not female, TS mice exhibit alterations in beta diversity compared to their wild-type (WT) littermates. Sex-dependent differences are also observed in the relative abundance of the classes Bacilli and Clostridia. Administering the SYN effectively counteracts hypersociability in females, and normalizes the overall abundance of Bacilli, specifically by increasing Lactobacillaceae. On the contrary, it rescues emotional recognition deficits in male TS mice and increases the relative abundance of the families Lactobacillaceae, Streptococcaceae and Atopobiaceae. In addition, a metagenome KEGG analysis of differentially enriched pathways shows relevant changes in the cofactor biosynthesis and the amino acid synthesis categories. Finally, following SYN treatment, both male and female TS mice exhibit a robust increase in propionic acid levels compared to WT littermates. These findings suggest sex-specific mechanisms that could link gut microbiota composition with behavior in TS mice, and underscore the potential of targeted gut microbiota interventions to modulate social abnormalities in neurodevelopmental disorders.}, }
@article {pmid39571342, year = {2024}, author = {Calvani, R and Giampaoli, O and Marini, F and Del Chierico, F and De Rosa, M and Conta, G and Sciubba, F and Tosato, M and Picca, A and Ciciarello, F and Galluzzo, V and Gervasoni, J and Di Mario, C and Santoro, L and Tolusso, B and Spagnoli, M and Tomassini, A and Aureli, W and Toto, F and Pane, S and Putignani, L and Miccheli, A and Marzetti, E and Landi, F and , }, title = {Beetroot juice intake positively influenced gut microbiota and inflammation but failed to improve functional outcomes in adults with long COVID: A pilot randomized controlled trial.}, journal = {Clinical nutrition (Edinburgh, Scotland)}, volume = {43}, number = {12}, pages = {344-358}, doi = {10.1016/j.clnu.2024.11.023}, pmid = {39571342}, issn = {1532-1983}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; Male ; Female ; *Beta vulgaris/chemistry ; *Fruit and Vegetable Juices ; Pilot Projects ; Adult ; Double-Blind Method ; Middle Aged ; *COVID-19 ; *Inflammation ; Dietary Supplements ; Nitrates ; SARS-CoV-2 ; Young Adult ; }, abstract = {BACKGROUND &amp; AIMS: Long-term effects of coronavirus disease 2019 (long COVID) develop in a substantial number of people following an acute COVID-19 episode. Red beetroot juice may have positive effects on multiple pathways involved in long COVID. The aim of this pilot study was to explore the impact of beetroot juice supplementation on physical function, gut microbiota, and systemic inflammation in adults with long COVID.<br><br>METHODS: A single-center, double-blind, placebo-controlled randomized trial was conducted to test the effects of 14 days of beetroot juice supplementation, rich in nitrates and betalains, on functional and biological outcomes in adults aged between 20 and 60 years with long COVID. Participants were randomized 1:1 to receive either daily oral supplementation with 200&#xa0;mL beetroot juice (&#x223c;600&#xa0;mg nitrate) or placebo (&#x223c;60&#xa0;mg nitrate) for 14 days. The primary endpoint was the change from baseline to day 14 in a fatigue resistance test. Secondary outcomes included the distance walked on the 6-min walk test, handgrip strength, and flow-mediated dilation. Secondary endpoints also included changes from baseline in circulating inflammatory mediators and metagenomic and fecal water metabolomic profiles. Partial least squares discriminant analysis (PLS-DA) models were built to evaluate the differences in biological variables associated with the interventions.<br><br>RESULTS: Thirty-one participants were randomized in the study. Twenty-five of them (median (interquartile range) age 40 (10), 14 [56&#xa0;%] women), received either beetroot juice (15) or placebo (10) and completed the study. At 14 days, fatigue resistance significantly improved from baseline (mean difference [standard error]:&#xa0;+21.8 [3.7] s; p&#xa0;<&#xa0;0.001) with no significant differences between intervention groups. A significant increase from baseline in the distance walked on the 6-min walk test was observed (mean difference [standard error]:&#xa0;+30.0 [9.4] m; p&#xa0;=&#xa0;0.03), which was not different between groups. Flow-mediated dilation did not differ between participants who received beetroot juice and those on placebo. PLS-DA models allowed correct classification of participants with 92.2&#xa0;&#xb1;&#xa0;4.4&#xa0;% accuracy. Those who ingested red beetroot juice had a greater abundance of bacteria with well-known beneficial effects, including Akkermansia, Oscillospira, Prevotella, Roseburia, Ruminococcaceae, and Turicibacter, compared with placebo. Participants allocated to beetroot juice supplementation were also characterized by significantly higher levels of fecal nicotinate, trimethylamine, and markers of beetroot juice intake (e.g., 5,6-dihydroxyindole). Finally, higher levels of interferon gamma and macrophage inflammatory protein-1&#x3b2; were found in participants who consumed beetroot juice.<br><br>CONCLUSION: Beetroot juice supplementation for two weeks did not to induce significant improvements in functional outcomes in adults with long COVID compared with placebo. Beneficial effects were observed in both gut microbiota composition (i.e., increase in probiotic species) and inflammatory mediators.<br><br>TRIAL REGISTRATION: Trial was registered under ClinicalTrials.gov. Identifier no. NCT06535165.}, }
@article {pmid39571000, year = {2024}, author = {Zapién-Campos, R and Bansept, F and Traulsen, A}, title = {Stochastic models allow improved inference of microbiome interactions from time series data.}, journal = {PLoS biology}, volume = {22}, number = {11}, pages = {e3002913}, pmid = {39571000}, issn = {1545-7885}, mesh = {*Stochastic Processes ; *Microbiota ; Models, Biological ; Metagenome ; Humans ; Microbial Interactions/physiology ; Algorithms ; }, abstract = {How can we figure out how the different microbes interact within microbiomes? To combine theoretical models and experimental data, we often fit a deterministic model for the mean dynamics of a system to averaged data. However, in the averaging procedure a lot of information from the data is lost-and a deterministic model may be a poor representation of a stochastic reality. Here, we develop an inference method for microbiomes based on the idea that both the experiment and the model are stochastic. Starting from a stochastic model, we derive dynamical equations not only for the average, but also for higher statistical moments of the microbial abundances. We use these equations to infer distributions of the interaction parameters that best describe the biological experimental data-improving identifiability and precision. The inferred distributions allow us to make predictions but also to distinguish between fairly certain parameters and those for which the available experimental data does not give sufficient information. Compared to related approaches, we derive expressions that also work for the relative abundance of microbes, enabling us to use conventional metagenome data, and account for cases where not a single host, but only replicate hosts, can be tracked over time.}, }
@article {pmid39570026, year = {2024}, author = {Waterworth, SC and Solomons, GM and Kalinski, J-CJ and Madonsela, LS and Parker-Nance, S and Dorrington, RA}, title = {The unique and enigmatic spirochete symbiont of latrunculid sponges.}, journal = {mSphere}, volume = {9}, number = {12}, pages = {e0084524}, pmid = {39570026}, issn = {2379-5042}, support = {87583//National Research Foundation (NRF)/ ; 110612//National Research Foundation (NRF)/ ; 96185//South African Medical Research Council (SAMRC)/ ; 101038//National Research Foundation (NRF)/ ; }, mesh = {*Symbiosis ; Animals ; *Porifera/microbiology ; *Phylogeny ; Metagenome ; Spirochaetales/genetics/classification/physiology ; }, abstract = {Bacterial symbionts are critical members of many marine sponge holobionts. Some sponge-associated bacterial lineages, such as Poribacteria, sponge-associated unclassified lineage (SAUL), and Tethybacterales, appear to have broad-host ranges and associate with a diversity of sponge species, while others are more species-specific, having adapted to the niche environment of their host. Host-associated spirochete symbionts that are numerically dominant have been documented in several invertebrates including termites, starfish, and corals. However, dominant spirochete populations are rare in marine sponges, having thus far been observed only in Clathrina clathrus and various species within the Latrunculiidae family, where they are co-dominant alongside Tethybacterales symbionts. This study aimed to characterize these spirochetes and their potential role in the host sponge. Analysis of metagenome-assembled genomes from eight latrunculid sponges revealed that these unusual spirochetes are relatively recent symbionts and are phylogenetically distinct from other sponge-associated spirochetes. Functional comparative analysis suggests that the host sponge may have selected for these spirochetes due to their ability to produce terpenoids and/or possible structural contributions.IMPORTANCESouth African latrunculid sponges are host to co-dominant Tethybacterales and Spirochete symbionts. While the Tethybacterales are broad-host range symbionts, the spirochetes have not been reported as abundant in any other marine sponge except Clathrina clathrus. However, spirochetes are regularly the most dominant populations in marine corals and terrestrial invertebrates where they are predicted to serve as beneficial symbionts. Here, we interrogated eight metagenome-assembled genomes of the latrunculid-associated spirochetes and found that these symbionts are phylogenetically distinct from all invertebrate-associated spirochetes. The symbiosis between the spirochetes and their sponge host appears to have been established relatively recently.}, }
@article {pmid39570022, year = {2024}, author = {Wang, W and Wang, H and Zou, X and Liu, Y and Zheng, K and Chen, X and Wang, X and Sun, S and Yang, Y and Wang, M and Shao, H and Liang, Y}, title = {A novel virus potentially evolved from the N4-like viruses represents a unique viral family: Poorviridae.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {12}, pages = {e0155924}, pmid = {39570022}, issn = {1098-5336}, mesh = {*Genome, Viral ; *Phylogeny ; China ; *Pseudoalteromonas/virology/genetics/isolation &amp; purification ; Seawater/virology ; DNA Viruses/genetics/classification/isolation &amp; purification ; Evolution, Molecular ; Capsid Proteins/genetics ; }, abstract = {UNLABELLED: Pseudoalteromonas are widely distributed in marine extreme habitats and exhibit diverse extracellular protease activity, which is essential for marine biogeochemical cycles. However, our understanding of viruses that infect Pseudoalteromonas remains limited. This study isolated a virus infecting Pseudoalteromonas nigrifaciens from Xiaogang in Qingdao, China. vB_PunP_Y3 comprises a linear, double-strand DNA genome with a length of 48,854 bp, encoding 52 putative open reading frames. Transmission electron microscopy demonstrates the short-tailed morphology of vB_PunP_Y3. Phylogenetic and genome-content-based analysis indicate that vB_PunP_Y3 represents a novel virus family named as Poorviridae, along with three high-quality uncultivated viral genomes. Biogeographical analyses show that Poorviridae is distributed across five viral ecological zones, and is predominantly detected in the Antarctic, Arctic, and bathypelagic zones. Comparative genomics analyses identified three of the seven hallmark proteins of N4-like viruses (DNA polymerase, major capsid protein, and virion-encapsulated RNA polymerase) from vB_PunP_Y3, combing with the protein tertiary structures of the major capsid protein, suggesting that vB_PunP_Y3 might evolve from the N4-like viruses.<br><br>IMPORTANCE: vB_PunP_Y3 is a unique strain containing three of the seven hallmark proteins of N4-like viruses, but is grouped into a novel family-level viral cluster with three uncultured viruses from metagenomics, named Poorviridae. This study enhanced the understanding about the genetic diversity, evolution, and distribution of Pseudoalteromonas viruses and provided insights into the novel evolution mechanism of marine viruses.}, }
@article {pmid39568064, year = {2024}, author = {Sauma-Sánchez, T and Alcorta, J and Tamayo-Leiva, J and Díez, B and Bezuidenhout, H and Cowan, DA and Ramond, JB}, title = {Functional redundancy buffers the effect of poly-extreme environmental conditions on southern African dryland soil microbial communities.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {12}, pages = {}, pmid = {39568064}, issn = {1574-6941}, support = {FBIS160422162807//National Research Foundation/ ; 1210912//Fondo Nacional de Desarrollo Cient&#xed;fico y Tecnol&#xf3;gico/ ; }, mesh = {*Soil Microbiology ; *Bacteria/genetics/classification ; *Archaea/genetics/classification ; *Microbiota ; *Salinity ; *Fungi/genetics/classification ; Climate Change ; Desert Climate ; Soil/chemistry ; Extreme Environments ; Africa, Southern ; Biodiversity ; }, abstract = {Drylands' poly-extreme conditions limit edaphic microbial diversity and functionality. Furthermore, climate change exacerbates soil desiccation and salinity in most drylands. To better understand the potential effects of these changes on dryland microbial communities, we evaluated their taxonomic and functional diversities in two Southern African dryland soils with contrasting aridity and salinity. Fungal community structure was significantly influenced by aridity and salinity, while Bacteria and Archaea only by salinity. Deterministic homogeneous selection was significantly more important for bacterial and archaeal communities' assembly in hyperarid and saline soils when compared to those from arid soils. This suggests that niche partitioning drives bacterial and archaeal communities' assembly under the most extreme conditions. Conversely, stochastic dispersal limitations drove the assembly of fungal communities. Hyperarid and saline soil communities exhibited similar potential functional capacities, demonstrating a disconnect between microbial structure and function. Structure variations could be functionally compensated by different taxa with similar functions, as implied by the high levels of functional redundancy. Consequently, while environmental selective pressures shape the dryland microbial community assembly and structures, they do not influence their potential functionality. This suggests that they are functionally stable and that they could be functional even under harsher conditions, such as those expected with climate change.}, }
@article {pmid39567690, year = {2025}, author = {Borton, MA and McGivern, BB and Willi, KR and Woodcroft, BJ and Mosier, AC and Singleton, DM and Bambakidis, T and Pelly, A and Daly, RA and Liu, F and Freiburger, A and Edirisinghe, JN and Faria, JP and Danczak, R and Leleiwi, I and Goldman, AE and Wilkins, MJ and Hall, EK and Pennacchio, C and Roux, S and Eloe-Fadrosh, EA and Good, SP and Sullivan, MB and Wood-Charlson, EM and Miller, CS and Ross, MRV and Henry, CS and Crump, BC and Stegen, JC and Wrighton, KC}, title = {A functional microbiome catalogue crowdsourced from North American rivers.}, journal = {Nature}, volume = {637}, number = {8044}, pages = {103-112}, pmid = {39567690}, issn = {1476-4687}, support = {P30 CA046934/CA/NCI NIH HHS/United States ; }, mesh = {*Crowdsourcing ; *Microbiota/genetics ; *Rivers/microbiology ; United States ; Water Microbiology ; Transcriptome ; Carbon Cycle ; Metagenome ; Databases, Factual ; }, abstract = {Predicting elemental cycles and maintaining water quality under increasing anthropogenic influence requires knowledge of the spatial drivers of river microbiomes. However, understanding of the core microbial processes governing river biogeochemistry is hindered by a lack of genome-resolved functional insights and sampling across multiple rivers. Here we used a community science effort to accelerate the sampling, sequencing and genome-resolved analyses of river microbiomes to create the Genome Resolved Open Watersheds database (GROWdb). GROWdb profiles the identity, distribution, function and expression of microbial genomes across river surface waters covering 90% of United States watersheds. Specifically, GROWdb encompasses microbial lineages from 27 phyla, including novel members from 10 families and 128 genera, and defines the core river microbiome at the genome level. GROWdb analyses coupled to extensive geospatial information reveals local and regional drivers of microbial community structuring, while also presenting foundational hypotheses about ecosystem function. Building on the previously conceived River Continuum Concept[1], we layer on microbial functional trait expression, which suggests that the structure and function of river microbiomes is predictable. We make GROWdb available through various collaborative cyberinfrastructures[2,3], so that it can be widely accessed across disciplines for watershed predictive modelling and microbiome-based management practices.}, }
@article {pmid39567665, year = {2024}, author = {Zhang, T and Hasegawa, Y and Waldor, MK}, title = {Enteric bacterial infection stimulates remodelling of bile metabolites to promote intestinal homeostasis.}, journal = {Nature microbiology}, volume = {9}, number = {12}, pages = {3376-3390}, pmid = {39567665}, issn = {2058-5276}, support = {P30 DK034854/DK/NIDDK NIH HHS/United States ; R01 AI042347/AI/NIAID NIH HHS/United States ; MKW//Howard Hughes Medical Institute (HHMI)/ ; }, mesh = {Female ; *Bile/metabolism ; Carboxylic Acids/analysis ; Citrobacter rodentium/physiology ; *Enterobacteriaceae Infections/metabolism ; *Gastrointestinal Microbiome ; Gene Expression Profiling ; Hydro-Lyases/genetics ; Lipidomics ; Listeria monocytogenes/physiology ; *Listeriosis/metabolism ; Liver ; Metabolic Networks and Pathways ; *Metabolome ; Mice, Inbred C57BL ; Sequence Analysis, RNA ; Specific Pathogen-Free Organisms ; Succinates/metabolism ; Succinic Acid/analysis ; Vibrio cholerae/physiology ; }, abstract = {The liver makes bile, an aqueous solution critical for fat absorption, which is secreted into the duodenum. Despite extensive studies on bile salts, other components of bile are less well characterized. Here we used global metabolomic analysis on bile from specific-pathogen-free, germ-free, Citrobacter rodentium-infected or Listeria monocytogenes-infected mice and identified a metabolome of 812 metabolites that were altered by both microbiota and enteric infection. Hepatic transcriptomics identified enteric-infection-triggered pathways that probably underlie bile remodelling. Enteric infection increased levels of four dicarboxylates in bile, including itaconate. Analysis of Acod1[-/-] mice indicated that increased itaconate also increased tuft cell abundance, altered microbiota composition and function as detected by metagenomic analysis, and modulated host defence, leading to reduced Vibrio cholerae colonization. Our data suggest that enteric-infection-associated signals are relayed between the intestine and liver and induce transcriptional programmes that shape the bile metabolome, modifying the immunomodulatory and host defence functions of bile.}, }
@article {pmid39567534, year = {2024}, author = {Wang, Z and Li, Z and Zhang, Y and Liao, J and Guan, K and Zhai, J and Meng, P and Tang, X and Dong, T and Song, Y}, title = {Root hair developmental regulators orchestrate drought triggered microbiome changes and the interaction with beneficial Rhizobiaceae.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {10068}, pmid = {39567534}, issn = {2041-1723}, mesh = {*Plant Roots/microbiology/metabolism ; *Droughts ; *Microbiota/physiology ; *Stress, Physiological ; Rhizobium/physiology/genetics ; Arabidopsis/microbiology/genetics/metabolism ; Metagenome ; Transcriptome ; Symbiosis ; }, abstract = {Drought is one of the most serious abiotic stresses, and emerging evidence suggest plant microbiome affects plant drought tolerance. However, there is a lack of genetic evidence regarding whether and how plants orchestrate the dynamic assembly of the microbiome upon drought. By utilizing mutants with enhanced or decreased root hair densities, we find that root hair regulators also affect drought induced root microbiome changes. Rhizobiaceae is a key biomarker taxa affected by root hair related mutants. We isolated and sequenced 1479 root associated microbes, and confirmed that several Rhizobium strains presented stress-alleviating activities. Metagenome, root transcriptome and root metabolome studies further reveal the multi-omic changes upon drought stress. We knocked out an ornithine cyclodeaminase (ocd) gene in Rhizobium sp. 4F10, which significantly dampens its stress alleviating ability. Our genetic and integrated multi-omics studies confirm the involvement of host genetic effects in reshaping a stress-alleviating root microbiome during drought, and provide mechanistic insights into Rhizobiaceae mediated abiotic stress protection.}, }
@article {pmid39566459, year = {2025}, author = {Xian, Y and Cao, L and Lu, Y and Li, Q and Su, C and He, Y and Zhou, G and Chen, S and Gao, S}, title = {Metagenomics and metaproteomics reveal the effects of sludge types and inoculation modes on N,N-dimethylformamide degradation pathways and the microbial community involved.}, journal = {Journal of hazardous materials}, volume = {481}, number = {}, pages = {136548}, doi = {10.1016/j.jhazmat.2024.136548}, pmid = {39566459}, issn = {1873-3336}, mesh = {*Sewage/microbiology ; *Dimethylformamide/metabolism ; *Metagenomics ; *Biodegradation, Environmental ; *Proteomics ; Microbiota ; Anaerobiosis ; Bacteria/metabolism/genetics/classification ; Aerobiosis ; Methylamines/metabolism ; }, abstract = {This study demonstrated the effects of the sludge type and inoculation method on the N,N-dimethylformamide degradation pathway and associated microbial communities. The sludge type is critical for DMF metabolism, with acclimatized aerobic sludge having a significant advantage in terms of DMF metabolism performance, whereas acclimatized anaerobic sludge has a reduced DMF metabolism capacity. Metagenomic revealed increased abundances of Methanosarcina, Pelomona and Xanthobacter in the adapted anaerobic sludge, suggesting that anaerobic sludge can utilize the methyl products produced by DMF metabolism for growth. Adapted aerobic sludge had high Mycobacterium abundance, significantly boosting DMF hydrolysis. In addition, a large number of dmfA2 genes were found in aerobic sludge, more so in acclimatized sludge, indicating stronger DMF metabolism. Conversely, acclimatized anaerobic sludge showed lower abundance of dmd-tmd and mauA/B, qhpA genes, implying long-term DMF toxicity reduced anaerobic microbial activity. Metaproteomic analysis showed that Methanosarcina and Methanomethylovorans enzymes in anaerobic sludge metabolized dimethylamine and methylamine to methane, aiding DMF degradation. In the aerobic sludge, aminohydrolase proteins, which hydrolyze DMF, were significantly upregulated. These findings provide insights into DMF wastewater treatment.}, }
@article {pmid39566458, year = {2025}, author = {Zhang, L and Jiang, L and Yan, W and Tao, H and Yao, C and An, L and Sun, Y and Hu, T and Sun, W and Qian, X and Gu, J}, title = {Exogenous additives reshape the microbiome and promote the reduction of resistome in co-composting of pig manure and mushroom residue.}, journal = {Journal of hazardous materials}, volume = {481}, number = {}, pages = {136544}, doi = {10.1016/j.jhazmat.2024.136544}, pmid = {39566458}, issn = {1873-3336}, mesh = {Animals ; *Composting ; *Manure/microbiology ; *Microbiota/drug effects ; Swine ; *Agaricales/genetics/drug effects ; Drug Resistance, Microbial/genetics ; Bacteria/genetics/drug effects ; Soil Microbiology ; Genes, Bacterial ; }, abstract = {Comprehensive understanding of the microbiome and resistome evolution in compost is crucial for guaranteeing the safety of organic fertilizers. Current studies using different composting systems and sequencing technologies have yielded varying conclusions on the efficacy of exogenous additives (EAs) in reducing antibiotic resistance genes (ARGs) in compost. This study employed metagenomics to investigate the impact of various EAs on microbial communities, ARGs, their coexistence with mobile genetic elements (MGEs), and ARG hosts in co-composting. Our results demonstrated that EAs significantly reshaped the microbial communities and facilitated a notable reduction in total ARG abundance and diversity, primarily by decreasing core ARGs. Cooperative rather than antagonistic relationships among bacteria. The RA changes in total ARGs are mainly caused by a decrease in the prevalence of core ARGs. Furthermore, EAs showed significant efficacy in reducing clinical ARGs, including cfxA, tetX1, cfxA6, vanA, and aac (6')-Ib', with diatomite (5 %) and zeolite (5 %) being the most effective. The effect of EAs on ARGs and microbial community assembly were stochastic processes. Composting stage and EAs jointly reduced the association between ARGs and MGEs in the composting system. The reduction of ARGs attributed to a decreased abundance of potential pathogenic ARG-associated hosts and diminished associations with MGEs. In conclusion, EAs present a straightforward and effective approach for promoting ARGs reduction in compost, offering crucial insights for assessing the environmental risks associated with the release of agricultural ARGs.}, }
@article {pmid39565113, year = {2024}, author = {Nowak, VV and Hou, P and Owen, JG}, title = {Microbial communities associated with marine sponges from diverse geographic locations harbor biosynthetic novelty.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {12}, pages = {e0072624}, pmid = {39565113}, issn = {1098-5336}, support = {Doctoral Scholarship//Victoria University of Wellington (WGTN)/ ; Contract 16/172//Manatu Hauora | Health Research Council of New Zealand (HRC)/ ; RDF-VUW1601//Royal Society Te Ap&#x101;rangi (Royal Society of New Zealand)/ ; RTVU1908 and UOAX2010//Ministry for Business Innovation and Employment (MBIE)/ ; }, mesh = {*Porifera/microbiology ; Animals ; New Zealand ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Metagenome ; *Microbiota ; Mediterranean Sea ; Multigene Family ; Metagenomics ; Phylogeny ; }, abstract = {Marine sponges are a prolific source of biologically active small molecules, many of which originate from sponge-associated bacteria. Identifying the producing bacteria is a key step in developing sustainable routes for the production of these metabolites. To facilitate the required computational analyses, we developed MetaSing, a reproducible singularity-based pipeline for assembly, identification of high-quality metagenome-assembled genomes (MAGs), and analysis of biosynthetic gene clusters (BGCs) from metagenomic short-read data. We applied this pipeline to metagenomic sequencing data from 16 marine sponges collected from New Zealand, Tonga, and the Mediterranean Sea. This analysis yielded 643 MAGs representing 510 species. Of the 2,670 BGCs identified across all samples, 70.8% were linked to a MAG. Comparison of BGCs to those identified from previously sequenced bacteria revealed high biosynthetic novelty in variety of underexplored phyla, including Poribacteria, Acidobacteriota, and Dadabacteria. Alongside the observation that each sample contains unique biosynthetic potential, this holds great promise for natural product discovery and for furthering the understanding of different sponge holobionts.IMPORTANCEDiscovery of new chemical compounds such as natural products is a crucial endeavor to combat the increasing resistance to antibiotics and other drugs. This manuscript demonstrates that microbial communities associated with marine sponges investigated in this work encode the potential to produce novel chemistry. Lesser studied bacterial taxa that are often difficult to cultivate are particularly rich in potential.}, }
@article {pmid39563700, year = {2024}, author = {Quezada-Romegialli, C and Quiroga-Carmona, M and D'Elía, G and Harrod, C and Storz, JF}, title = {Diet of Andean Leaf-Eared Mice (Phyllotis) Living at Extreme Elevations on Atacama Volcanoes: Insights From Metagenomics, DNA Metabarcoding, and Stable Isotopes.}, journal = {Ecology and evolution}, volume = {14}, number = {11}, pages = {e70591}, pmid = {39563700}, issn = {2045-7758}, support = {R01 HL159061/HL/NHLBI NIH HHS/United States ; }, abstract = {On the flanks of > 6000 m Andean volcanoes that tower over the Atacama Desert, leaf-eared mice (Phyllotis vaccarum) live at extreme elevations that surpass known vegetation limits. The diet of these mice in these barren, hyperarid environments has been the subject of much speculation. According to the arthropod fallout hypothesis, sustenance is provided by windblown insects that accumulate in snowdrifts ("aolian deposits"). Mice may also feed on saxicolous lichen or forms of cryptic vegetation that have yet to be discovered at such high elevations. We tested hypotheses about the diet of mice living at extreme elevations on Atacama volcanoes by combining metagenomic and DNA metabarcoding analyses of gut contents with stable isotope analyses of mouse tissues. Genomic analyses of contents of the gastrointestinal tract of a live-captured mouse from the summit of Volcán Llullaillaco (6739 m) revealed an opportunistic but purely herbivorous diet, including lichens. Although we found no evidence of animal DNA in gut contents of the summit mouse, stable isotope data indicate that mice from elevations at or near vegetation limits (~5100 m) include a larger fraction of animal prey in their diet than mice from lower elevations. Some plant species detected in the gut contents of the summit mouse are known to exist at lower elevations at the base of the volcano and in the surrounding Altiplano, suggesting that they may occur at higher elevations beneath the snowpack or in other cryptic microhabitats.}, }
@article {pmid39563409, year = {2024}, author = {Li, M and Chen, K and Chen, Y and Zhang, L and Cui, Y and Xiao, F and Liu, Z and Zhang, W and Jiang, J and Zhou, Q and Yan, J and Sun, Y and Guan, F}, title = {Integrative analysis of gut microbiome and host transcriptome reveal novel molecular signatures in Hashimoto's thyroiditis.}, journal = {Journal of translational medicine}, volume = {22}, number = {1}, pages = {1045}, pmid = {39563409}, issn = {1479-5876}, support = {82071952//Natural Science Foundation of China/ ; 82171873//Natural Science Foundation of China/ ; 82370806//Natural Science Foundation of China/ ; 82030058//Natural Science Foundation of China/ ; }, mesh = {Humans ; *Hashimoto Disease/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; *Transcriptome/genetics ; Female ; Male ; Adult ; Case-Control Studies ; MicroRNAs/genetics/metabolism ; Middle Aged ; ROC Curve ; RNA, Messenger/genetics/metabolism ; Gene Expression Profiling ; }, abstract = {BACKGROUND: Hashimoto's thyroiditis (HT) is an autoimmune disorder with unclear molecular mechanisms. While current diagnosis is well-established, understanding of the gut-thyroid axis in HT remains limited. This study aimed to uncover novel molecular signatures in HT by integrating gut metagenome and host transcriptome data (miRNA/mRNA), potentially elucidating disease pathogenesis and identifying new therapeutic targets.<br><br>METHODS: We recruited 31 early HT patients and 30 healthy controls in a two-stage study (discovery and validation). Blood and fecal samples underwent RNA and metagenomic sequencing, respectively. Integrative analysis included differential expression, weighted correlation network, correlation and random forest analyses. Regression models and ROC curve analysis were used to evaluate the significance of identified molecular signatures in HT.<br><br>RESULTS: Integrative analysis revealed subtle changes in gut microbiota diversity and composition in early HT, increased abundance of Bacillota_A and Spirochaetota at the phylum level, and significant differences in 24 genera and 67 species. Ecological network analysis indicated an imbalance in the gut microbiota with reduced inhibitory interactions against pathogenic genera in HT. Functional analysis showed changes in infection- and immune-related pathways. Three characteristic species (Salaquimonas_sp002400845, Clostridium_AI_sp002297865, and Enterocloster_citroniae) were identified as most relevant to HT. Analysis of miRNA and mRNA expression profiles uncovered pathways related to immune response, inflammation, infection, metabolism, proliferation, and thyroid cancer in HT. Based on correlations with HT and interactions between them, six characteristic RNAs (hsa-miR-548aq-3p, hsa-miR-374a-5p, GADD45A, IRS2, SMAD6, WWTR1) were identified. Furthermore, our study uncovered significant gut microbiota-host transcriptome interactions in HT, revealing enrichment in metabolic, immune, and cancer-related pathways, particularly with strong associations among those 9 key molecular signatures. The validation stage confirmed improved HT classification accuracy by combining these signatures (AUC&#x2009;=&#x2009;0.95, ACC&#x2009;=&#x2009;0.85), suggesting their potential significance in understanding HT pathogenesis.<br><br>CONCLUSION: Our study reveals novel molecular signatures linking gut microbiome and host transcriptome in HT, providing new insights into the disease pathogenesis. These findings not only enhance our understanding of the gut-thyroid axis but also suggest potential new directions for therapeutic interventions in HT.}, }
@article {pmid39563023, year = {2025}, author = {Park, HA and Sung, J and Chang, Y and Ryu, S and Yoon, KJ and Kim, HL and Kim, HN}, title = {Metagenomic Analysis Identifies Sex-Related Gut Microbial Functions and Bacterial Taxa Associated With Skeletal Muscle Mass.}, journal = {Journal of cachexia, sarcopenia and muscle}, volume = {16}, number = {1}, pages = {e13636}, pmid = {39563023}, issn = {2190-6009}, support = {2023R1A2C2006416//National Research Foundation of Korea/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; *Muscle, Skeletal/microbiology ; *Metagenomics/methods ; Middle Aged ; Feces/microbiology ; Adult ; Bacteria/classification/genetics ; Metagenome ; }, abstract = {BACKGROUND: This study aimed to explore the association between gut microbiota functional profiles and skeletal muscle mass, focusing on sex-specific differences in a population under 65 years of age.<br><br>METHODS: Stool samples from participants were analysed using metagenomic shotgun sequencing. Skeletal muscle mass and skeletal muscle mass index (SMI) were quantified (SMI [%]&#x2009;=&#x2009;total appendage muscle mass [kg]/body weight [kg]&#x2009;&#xd7;&#x2009;100) using bioelectrical impedance analysis. Participants were categorized into SMI quartiles, and associations between gut microbiota, functional profiling and SMI were assessed by sex, adjusting for age, BMI and physical activity.<br><br>RESULTS: The cohort included 1027 participants (651 men, 376 women). In men, Escherichia coli (log2 fold change 3.08, q&#x2009;=&#x2009;0.001), Ruminococcus_B gnavus (log2 fold change 2.89, q&#x2009;=&#x2009;0.014) and Enterocloster sp001517625 (log2 fold change 2.47, q&#x2009;=&#x2009;0.026) were more abundant in the lowest SMI compared to the highest SMI group. In contrast, Bifidobacterium bifidum (log2 fold change 3.13, q&#x2009;=&#x2009;0.025) showed higher levels in the second lowest SMI group in women. Microbial pathways associated with amino acid synthesis (MET-SAM-PWY: log2 fold change 0.42; METSYN-PWY: log2 fold change 0.44; SER-GLYSYN-PWY: log2 fold change 0.20; PWY-5347: log2 fold change 0.41; P4-PWY: log2 fold change 0.53), N-acetylneuraminate degradation (log2 fold change 0.43), isoprene biosynthesis (log2 fold change 0.20) and purine nucleotide degradation and salvage (PWY-6353: log2 fold change 0.42; PWY-6608: log2 fold change 0.38; PWY66-409: log2 fold change 0.52; SALVADEHYPOX-PWY: log2 fold change 0.43) were enriched in the lowest SMI in men (q&#x2009;<&#x2009;0.10). In women, the second lowest SMI group showed enrichment in energy-related pathways, including lactic acid fermentation (ANAEROFRUCAT-PWY: log2 fold change 0.19), pentose phosphate pathway (PENTOSE-P-PWY: log2 fold change 0.30) and carbohydrate degradation (PWY-5484: log2 fold change 0.31; GLYCOLYSIS: log2 fold change 0.29; PWY-6901: log2 fold change 0.27) (q&#x2009;<&#x2009;0.05).<br><br>CONCLUSIONS: This study highlights sex-specific differences in gut microbiota and functional pathways associated with SMI. These findings suggest that gut microbiota may play a role in muscle health and point toward microbiota-targeted strategies for maintaining muscle mass.}, }
@article {pmid39562866, year = {2024}, author = {Camacho-Mateu, J and Lampo, A and Ares, S and Cuesta, JA}, title = {Nonequilibrium microbial dynamics unveil a new macroecological pattern beyond Taylor's law.}, journal = {Physical review. E}, volume = {110}, number = {4-1}, pages = {044402}, doi = {10.1103/PhysRevE.110.044402}, pmid = {39562866}, issn = {2470-0053}, mesh = {*Models, Biological ; Microbiota ; }, abstract = {We introduce a comprehensive analytical benchmark, relying on Fokker-Planck formalism, to study microbial dynamics in the presence of both biotic and abiotic forces. In equilibrium, we observe a balance between the two kinds of forces, leading to no correlations between species abundances. This implies that real microbiomes, where correlations have been observed, operate out of equilibrium. Therefore, we analyze nonequilibrium dynamics, presenting an ansatz for an approximate solution that embodies the complex interplay of forces in the system. This solution is consistent with Taylor's law as a coarse-grained approximation of the relation between species abundance and variance, but implies subtler effects, predicting unobserved structure beyond Taylor's law. Motivated by this theoretical prediction, we refine the analysis of existing metagenomic data, unveiling a novel universal macroecological pattern. Finally, we speculate on the physical origin of Taylor's law: building upon an analogy with Brownian motion theory, we propose that Taylor's law emerges as a fluctuation-growth relation resulting from equipartition of environmental resources among microbial species.}, }
@article {pmid39562308, year = {2024}, author = {Yang, Y and Xu, P and He, W and Tao, F}, title = {Metagenomic analysis reveals houseflies as indicators for monitoring environmental antibiotic resistance genes.}, journal = {Environmental microbiology reports}, volume = {16}, number = {6}, pages = {e70032}, pmid = {39562308}, issn = {1758-2229}, support = {32170105//National Natural Science Foundation of China/ ; MMLKF20-03//State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University/ ; }, mesh = {*Houseflies/microbiology/genetics ; *Metagenomics ; Animals ; *Anti-Bacterial Agents/pharmacology ; *Environmental Monitoring ; Genes, Bacterial/genetics ; Drug Resistance, Microbial/genetics ; Microbiota/genetics ; Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Drug Resistance, Bacterial/genetics ; }, abstract = {Given the threat to public health posed by antibiotic resistance transmission, environmental monitoring is essential for tracking antibiotic resistance genes (ARGs). Houseflies, being ubiquitous organisms capable of carrying and disseminating ARGs, serve as suitable indicators for environmental monitoring. In this study, we employ metagenomic approaches to investigate housefly body surface samples from five typical sites associated with human activities. The investigation reveals microbiome diversity among the samples, along with variations in the occurrence and mobility potential of ARGs. Metagenomic analysis indicates that the composition of ARGs on housefly body surfaces is influenced by environmental ARGs, which may be enriched on the housefly body surface. The resistance genes related to multidrug, β-lactam, bacitracin, and tetracycline were the predominant ARGs detected, with multidrug-related ARGs consistently exhibiting dominance. Furthermore, the abundance of ARGs in the different housefly body surface samples was found to correlate with the population density and mobility of the sampling site. Natural environments exhibited the lowest ARG abundance, while areas with higher population density and limited population mobility displayed higher ARG abundance. This study emphasizes the effectiveness of houseflies as monitors for environmental ARGs and underscores their potential for assessing and controlling antibiotic resistance risks in urban environments.}, }
@article {pmid39561782, year = {2024}, author = {Lee, D and Ahn, K and Yun, K and Oh, Y and Park, YS and Kim, YS and Gim, JA and Mun, S and Mun, JW and Han, K and Ahn, YJ}, title = {Aerobic bacterial group as an early-stage biomarker from faecal samples of patients with colorectal cancer without distant metastasis.}, journal = {Beneficial microbes}, volume = {16}, number = {2}, pages = {201-219}, doi = {10.1163/18762891-bja00051}, pmid = {39561782}, issn = {1876-2891}, mesh = {Humans ; *Colorectal Neoplasms/diagnosis/microbiology/pathology ; *Feces/microbiology ; Male ; Middle Aged ; Female ; RNA, Ribosomal, 16S/genetics ; Aged ; *Gastrointestinal Microbiome ; Biomarkers, Tumor ; Early Detection of Cancer/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; Adult ; }, abstract = {The current approaches for detecting most colorectal polyps and early neoplasms lack sufficient sensitivity and specificity, potentially hindering treatment and ultimately reducing survival rates. Here, we performed a metagenomic analysis to identify microbiome markers in stool samples from patients with early-stage colorectal cancer (CRC). We compared the composition of gut microbiota between patients with CRC and healthy individuals, specifically focusing on patients with early-stage CRC, defined as those without core mutations (KRAS, BRAF) for CRC diagnosis, stable microsatellite instability, and distant metastasis. The aim of our study is to identify potential biomarkers from gut microbiota at different cancer stages in colorectal cancer (CRC) patients through 16S rRNA amplicon sequencing, thereby proposing a novel non-invasive method for the early diagnosis of CRC. Specific microbes were detected from groups divided based on the TNM criteria, with one group classified by tumour size only (named the T group) and another group with lymph node metastasis (named the TN group). Aerobic bacteria, such as Delftia, Stenotrophomonas, Sphingobacterium, Rhodococcus, Devosia, Ensifer, and Psychrobacter were predominantly detected in patients with CRC without lymph node metastasis. The diagnostic prediction was evaluated using the CatBoost algorithm; these microbes presented high diagnostic accuracy with a receiver operating characteristics-area under curve of 0.8, which was validated using qPCR. In conclusion, this study identified specific aerobic microbial groups as non-invasive biomarkers for early diagnosis in patients with CRC without genetic or environmental factors.}, }
@article {pmid39560390, year = {2025}, author = {Lin, H and Wu, L and Zhang, L and Ta, QK and Liu, P and Song, J and Yang, X}, title = {Metagenome-based diversity and functional analysis of culturable microbes in sugarcane.}, journal = {Microbiology spectrum}, volume = {13}, number = {1}, pages = {e0198224}, pmid = {39560390}, issn = {2165-0497}, mesh = {*Saccharum/microbiology ; *Soil Microbiology ; *Rhizosphere ; *Bacteria/classification/genetics/isolation &amp; purification ; *Metagenome ; *Microbiota/genetics ; *Metagenomics/methods ; Biodiversity ; Burkholderia/genetics/classification/isolation &amp; purification ; Phylogeny ; }, abstract = {UNLABELLED: Sugarcane is a key crop for sugar and energy production, and understanding the diversity of its associated microbes is crucial for optimizing its growth and health. However, there is a lack of thorough investigation and use of microbial resources in sugarcane. This study conducted a comprehensive analysis of culturable microbes and their functional features in different tissues and rhizosphere soil of four diverse sugarcane species using metagenomics techniques. The results revealed significant microbial diversity in sugarcane's tissues and rhizosphere soil, including several important biomarker bacterial taxa identified, which are reported to engage in several processes that support plant growth, such as nitrogen fixation, phosphate solubilization, and the production of plant hormones. The Linear discriminant analysis Effect Size (LEfSe) studies identified unique microbial communities in different parts of the same sugarcane species, particularly Burkholderia, which exhibited significant variations across the sugarcane species. Microbial analysis of carbohydrate-active enzymes (CAZymes) indicated that genes related to sucrose metabolism were mostly present in specific bacterial taxa, including Burkholderia, Pseudomonas, Paraburkholderia, and Chryseobacterium. This study improves understanding of the diversities and functions of endophytes and rhizosphere soil microbes in sugarcane. Moreover, the approaches and findings of this study provide valuable insights for microbiome research and the use of comparable technologies in other agricultural fields.<br><br>IMPORTANCE: This work utilized metagenomics techniques for conducting a comprehensive examination of culturable microbes and their functional characteristics in various tissues and rhizosphere soil of four distinct sugarcane species. This study enhances comprehension of the diversity and functions of endophytes and rhizosphere soil microbes in sugarcane. Furthermore, the methodologies and discoveries of this work offer new perspectives for microbiome investigation and the use of similar technologies in other agricultural fields.}, }
@article {pmid39558081, year = {2024}, author = {Yang, M and Zhao, Y and Li, L and Qi, Y and Gao, P and Guo, J and Liu, J and Chen, Z and Zhao, J and Yu, L}, title = {Functional dynamics analysis of endophytic microbial communities during Amorphophallus muelleri seed maturation.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {28432}, pmid = {39558081}, issn = {2045-2322}, support = {YJL24014//Talent Introduction Program of Kunming University/ ; 202201AT070113//Yunnan Provincial Science and Technology Dep artment/ ; 202101AO070075//Yunnan Provincial Science and Technology Dep artment/ ; 202401AU070020//Yunnan Provincial Science and Technology Dep artment/ ; 202201AU070043//Yunnan Provincial Science and Technology Dep artment/ ; 202101BA070001-174//Yunnan Provincial Science and Technology Dep artment/ ; 202301AU070136//Yunnan Provincial Science and Technology Dep artment/ ; 2022J0644//Yunnan Education Department Research Project/ ; 2023J0827//Yunnan Education Department Research Project/ ; YNWR-QNBJ-2018-324//Yunnan Province Youth Talent Support Program/ ; }, mesh = {*Seeds/microbiology/growth &amp; development ; *Endophytes/genetics ; *Microbiota/genetics ; *Amorphophallus/microbiology ; Metagenomics/methods ; Bacteria/genetics/classification ; Ascomycota/genetics ; Fungi/genetics/classification ; }, abstract = {Konjac seeds of Amorphophallus muelleri are produced through a unique form of apomixis in triploid parthenogenesis, and typically require a longer maturation period (approximately 8 months). To date, the relevant functions of endophytic microbial taxa during A. muelleri seed development and maturation remain largely unexplored. In this study, we analyzed the functional adaptability and temporal dynamics of endophytic microbial communities during three stages of A. muelleri seed maturation. Through metagenomic sequencing, we determined that the functions of the endophytic microbiome in A. muelleri seeds were driven by the seed maturation status, and the functions of the microbial communities in the seed coats and seeds differed significantly. The species annotation results show that Proteobacteria, Actinobacteria, Ascomycota, and Basidiomycota were the dominant bacterial and fungal communities in A. muelleri seeds at different maturation stages. The KEGG and COG functional gene annotation results revealed that the seed samples during the three maturation stages had higher KO functional diversity than the seed coat samples, and the COG functional diversity of the green and red seed samples was also significantly higher than that of the seed coat samples. At different maturation stages, microbial functional genes involved in energy production and conversion as well as carbon fixation were enriched in the A. muelleri seed coats, while microbial functional genes involved in signal transduction mechanisms, amino acid transport and metabolism, carbohydrate metabolism, and lipid metabolism were more highly expressed in the seeds. Moreover, in the middle to late stages of seed maturation, the microbial functional genes involved in the biosynthesis of resistant compounds such as phenols, flavonoids, and alkaloids were significantly enriched to enhance the resistance and environmental adaptation of A. muelleri seeds. The results verified that the functions of the endophytic microbial communities change dynamically during A. muelleri seed maturation to adapt to the current needs of the host plant, which has significant implications for the exploration and utilization of functional microbial resources in A. muelleri seeds.}, }
@article {pmid39557257, year = {2024}, author = {Dong, J and Wang, L and Bai, Y and Huang, X and Chen, C and Liu, Y}, title = {Study on the physicochemical properties and immune regulatory mechanism of polysaccharide fraction from Aronia Melanocarpa fruit.}, journal = {International journal of biological macromolecules}, volume = {283}, number = {Pt 2}, pages = {137696}, doi = {10.1016/j.ijbiomac.2024.137696}, pmid = {39557257}, issn = {1879-0003}, mesh = {*Photinia/chemistry ; *Polysaccharides/pharmacology/chemistry ; Animals ; Mice ; *Fruit/chemistry ; *Gastrointestinal Microbiome/drug effects ; Chemical Phenomena ; Molecular Weight ; }, abstract = {Aronia Melanocarpa (Michx.) Elliott fruit has been extensively used in the food and medicinal fields. This study aimed to analyze the physicochemical properties of a polysaccharide fraction (AMP2) isolated from this fruit for the first time and investigated its immune regulatory mechanism. The physicochemical properties of AMP2 were determined using high-performance gel permeation chromatography, PMP derivatization-high performance liquid chromatography, Ultraviolet spectroscopy, and infrared spectroscopy. The metagenomic technology was applied to investigate the regulatory effects and mechanisms of AMP2 on the gut microbiota of immunosuppressed mice. The results showed that molecular weight of AMP2 was 83,444 Da, which was mainly composed of D-arabinose, D-xylose, D-mannose, D-rhamnose and D-glucose, and both β-type and α-type glycosidic bonds contained in its structure. AMP2 changed the composition of gut microbiota by increasing the number of beneficial and probiotic bacteria, thereby regulated the intestinal mucosal immune system of host. AMP2 improved intestinal immune system response and antimicrobial capacity through positive regulation of the NOD-like receptor signaling pathway and neutrophil extracellular trap formation. The results demonstrate the potential of AMP2 in immune regulation, providing a new perspective for its subsequent development and contributing to the development and application of related health foods.}, }
@article {pmid39557245, year = {2024}, author = {Qin, X and Huang, W and Li, Q}, title = {Lignocellulose biodegradation to humic substances in cow manure-straw composting: Characterization of dissolved organic matter and microbial community succession.}, journal = {International journal of biological macromolecules}, volume = {283}, number = {Pt 3}, pages = {137758}, doi = {10.1016/j.ijbiomac.2024.137758}, pmid = {39557245}, issn = {1879-0003}, mesh = {*Humic Substances/analysis ; *Lignin/chemistry/metabolism ; *Manure/microbiology/analysis ; Cattle ; Animals ; *Composting/methods ; *Biodegradation, Environmental ; Microbiota ; }, abstract = {Composting, a sustainable practice, facilitates the biodegradation of organic waste, notably lignocellulosic biomass, into value-added humic substances. Despite its potential, the application of electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) to characterize dissolved organic matter (DOM) for assessing the changes in maturity during cow manure-straw composting is underexplored. Furthermore, the link between these changes, microbial community succession, and the biochemical pathways of humus formation is seldom investigated. This study leveraged ESI FT-ICR MS and metagenomic analysis to elucidate the molecular changes in DOM, identified key microbes in humus formation, and traced the humus formation pathway during composting. The results highlighted the crucial role of microorganisms such as Thermobifida, Luteimonas, Ascomycota, and Chloroflexi in accelerating the breakdown and transformation of plant biopolymers. Large molecular nitrogen compounds from cow manure-straw were converted into unsaturated, aromatic oxygen compounds, which resemble humic substances in their chemical properties. The ESI FT-ICR MS data revealed that humus formation occurred through a series of reactions, including protein deamination, lignin delignification, and decarbonylation. This research offered new light on strategies to enhance the stabilization and humification of cow manure-straw composting, contributing to more effective composting processes.}, }
@article {pmid39557129, year = {2025}, author = {Drane, K and Huerlimann, R and Jones, R and Whelan, A and Sheehan, M and Ariel, E and Kinobe, R}, title = {Concordance in molecular methods for detection of antimicrobial resistance: A cross sectional study of the influent to a wastewater plant.}, journal = {Journal of microbiological methods}, volume = {228}, number = {}, pages = {107069}, doi = {10.1016/j.mimet.2024.107069}, pmid = {39557129}, issn = {1872-8359}, mesh = {*Wastewater/microbiology ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Australia ; Metagenomics/methods ; Anti-Bacterial Agents/pharmacology ; Microbiota/genetics/drug effects ; Genes, Bacterial/genetics ; Drug Resistance, Bacterial/genetics ; }, abstract = {Methods that are used to characterise microbiomes and antimicrobial resistance genes (ARGs) in wastewater are not standardised. We used shotgun metagenomic sequencing (SM-Seq), RNA sequencing (RNA-seq) and targeted qPCR to compare microbial and ARG diversity in the influent to a municipal wastewater treatment plant in Australia. ARGs were annotated with CARD-RGI and MEGARes databases, and bacterial diversity was characterised by 16S rRNA gene sequencing and SM-Seq, with species annotation in SILVA/GreenGenes databases or Kraken2 and the NCBI nucleotide database respectively. CARD and MEGARes identified evenly distributed ARG profiles but MEGARes detected a richer array of ARGs (richness = 475 vs 320). Qualitatively, ARGs encoding for aminoglycoside, macrolide-lincosamide-streptogramin and multidrug resistance were the most abundant in all examined databases. RNA-seq detected only 32 % of ARGs identified by SM-Seq, but there was concordance in the qualitative identification of aminoglycoside, macrolide-lincosamide, phenicol, sulfonamide and multidrug resistance by SM-Seq and RNA-seq. qPCR confirmed the detection of some ARGs, including OXA, VEB and EREB, that were identified by SM-Seq and RNA-seq in the influent. For bacteria, SM-Seq or 16S rRNA gene sequencing were equally effective in population profiling at phyla or class level. However, SM-Seq identified a significantly higher species richness (richness = 15,000 vs 3750). These results demonstrate that SM-Seq with gene annotation in CARD and MEGARes are equally sufficient for surveillance of antimicrobial resistance in wastewater. For more precise ARG identification and quantification however, MEGARes presented a better resolution. The functionality of detected ARGs was not confirmed, but general agreement on the putative phenotypic resistance profile by antimicrobial class was observed between RNA-Seq and SM-Seq.}, }
@article {pmid39556491, year = {2025}, author = {Shete, O and Ghosh, TS}, title = {Normal Gut Microbiomes in Diverse Populations: Clinical Implications.}, journal = {Annual review of medicine}, volume = {76}, number = {1}, pages = {95-114}, doi = {10.1146/annurev-med-051223-031809}, pmid = {39556491}, issn = {1545-326X}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; }, abstract = {The human microbiome is a sensor and modulator of physiology and homeostasis. Remarkable tractability underpins the promise of therapeutic manipulation of the microbiome. However, the definition of a normal or healthy microbiome has been elusive. This is in part due to the underrepresentation of minority groups and major global regions in microbiome studies to date. We review studies of the microbiome in different populations and highlight a commonality among health-associated microbiome signatures along with major drivers of variation. We also provide an overview of microbiome-associated therapeutic interventions for some widespread, widely studied diseases. We discuss sources of bias and the challenges associated with defining population-specific microbiome reference bases. We propose a roadmap for defining normal microbiome references that can be used for population-customized microbiome therapeutics and diagnostics.}, }
@article {pmid39551951, year = {2024}, author = {Yao, L and Devotta, H and Li, J and Lunjani, N and Sadlier, C and Lavelle, A and Albrich, WC and Walter, J and O'Toole, PW and O'Mahony, L}, title = {Dysrupted microbial tryptophan metabolism associates with SARS-CoV-2 acute inflammatory responses and long COVID.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2429754}, pmid = {39551951}, issn = {1949-0984}, mesh = {Humans ; *Tryptophan/metabolism/blood ; *COVID-19/immunology/microbiology ; *Gastrointestinal Microbiome ; Male ; Female ; *SARS-CoV-2/immunology ; *Cytokines/blood/metabolism ; Middle Aged ; Aged ; *Feces/microbiology/virology ; Post-Acute COVID-19 Syndrome ; Indoles/metabolism ; Indoleacetic Acids/metabolism/blood ; Inflammation ; Adult ; Dysbiosis/microbiology ; }, abstract = {Protection against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and risk of long COVID has been associated with the depletion or over-abundance of specific taxa within the gut microbiome. However, the microbial mechanisms mediating these effects are not yet known. We hypothesized that altered microbial production of tryptophan and its downstream derivatives might contribute to inappropriate immune responses to viral infection. In patients hospitalized with COVID-19 (n = 172), serum levels of tryptophan and indole-3-propionate (IPA) negatively correlated with serum levels of many proinflammatory mediators (including C-reactive protein and Serum amyloid A), while C-glycosyltryptophan (C-Trp), indole-3-lactic acid (ILA) and indole-3-acetic acid (IAA) levels were positively correlated with levels of acute phase proteins, proinflammatory cytokines, alarmins and chemokines. A similar pattern was observed in long COVID patients (n = 20) where tryptophan and IPA were negatively associated with a large number of serum cytokines, while C-Trp and IAA were positively associated with circulating cytokine levels. Metagenomic analysis of the fecal microbiota showed the relative abundance of genes encoding the microbial enzymes required for tryptophan production (e.g. anthranilate synthase) and microbial tryptophan metabolism was significantly lower in patients hospitalized with COVID-19 (n = 380) compared to healthy controls (n = 270). Microbial tryptophan metabolites reduced innate cell proinflammatory responses to cytosolic DNA sensor Stimulator of interferon genes (STING), toll-like receptor (TLR)-3 and TLR-4 stimulation in vitro, while IL-10 secretion was enhanced. Microbial tryptophan metabolites also modified ex vivo human lymphocyte responses by limiting the production of TH1 and TH17 associated cytokines, while enhancing secretion of IL-22. These data suggest that lower levels of tryptophan production and tryptophan metabolism by gut microbes may increase the risk of severe and chronic outcomes to SARS-CoV-2 infection due to impaired innate and adaptive responses to infection. Screening patients for lower-level microbiome capacity for tryptophan metabolism may help identify at-risk individuals.}, }
@article {pmid39551884, year = {2024}, author = {Mamo, Z and Abera, S and Tafesse, M}, title = {Taxonomic and functional profiling of microbial community in municipal solid waste dumpsite.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {40}, number = {12}, pages = {384}, pmid = {39551884}, issn = {1573-0972}, support = {EN-1/17-1/18//Addis Ababa Science and Technology University/ ; }, mesh = {*Solid Waste ; *Bacteria/classification/genetics/metabolism ; *Waste Disposal Facilities ; *Microbiota ; *Metagenomics ; Phylogeny ; Refuse Disposal ; Biodegradation, Environmental ; Drug Resistance, Microbial/genetics ; Soil Microbiology ; }, abstract = {Understanding the microbial ecology of landfills is crucial for improving waste management strategies and utilizing the potential of these microbial communities for biotechnological applications. This study aimed to conduct a comprehensive taxonomic and functional profiling of the microbial community present in the Addis Ababa municipal solid waste dumpsite using a shotgun metagenomics sequencing approach. The taxonomic analysis of the sample revealed the significant presence of bacteria, with the Actinomycetota (56%), Pseudomonadota (23%), Bacillota (3%), and Chloroflexota (3%) phyla being particularly abundant. The most abundant KEGG categories were carbohydrates metabolism, membrane transport, signal transduction, and amino acid metabolism. The biodegradation and metabolism of xenobiotics, as well as terpenoids and polyketides, were also prevalent. Moreover, the Comprehensive Antibiotic Resistance Database (CARD) identified 52 antibiotic resistance gene (ARG) subtypes belonging to 14 different drug classes, with the highest abundances observed for glycopeptide, phosphonic acid, and multidrug resistance genes. Actinomycetota was the dominant phylum harboring ARGs, followed by Pseudomonadota and Chloroflexota. This study offers valuable insights into the taxonomic and functional diversity of the microbial community in the Addis Ababa municipal solid waste dumpsite. It sheds light on the widespread presence of metabolically versatile microbes, antibiotic resistance genes, mobile genetic elements, and pathogenic bacteria. This understanding can contribute to the creation of efficient waste management strategies and the investigation of possible biotechnological uses for these microbial communities.}, }
@article {pmid39551356, year = {2025}, author = {Lalli, MK and Salo, TE and Hakola, L and Knip, M and Virtanen, SM and Vatanen, T}, title = {Associations between dietary fibers and gut microbiome composition in the EDIA longitudinal infant cohort.}, journal = {The American journal of clinical nutrition}, volume = {121}, number = {1}, pages = {83-99}, pmid = {39551356}, issn = {1938-3207}, mesh = {Humans ; *Dietary Fiber/administration &amp; dosage ; *Gastrointestinal Microbiome ; Infant ; Longitudinal Studies ; Female ; Male ; Cross-Sectional Studies ; Infant Nutritional Physiological Phenomena ; Cohort Studies ; Milk, Human/chemistry ; Bacteria/classification/genetics ; Diet ; Feces/microbiology ; }, abstract = {BACKGROUND: The infant gut microbiome undergoes rapid changes in the first year of life, supporting normal development and long-term health. Although diet shapes this process, the role of fibers in complementary foods on gut microbiome maturation is poorly understood.<br><br>OBJECTIVES: We explored how the transition from human milk to fibers in complementary foods shapes the taxonomic and functional maturation of the gut microbiome within the first year of life.<br><br>METHODS: We assessed the longitudinal and cross-sectional development of infant gut microbiomes (N = 68 infants) and metabolomes (N = 33 infants) using linear mixed models to uncover their associations to dietary fibers and their food sources. Fiber intakes were assessed with 3-d food records (months 3, 6, 9, and 12) relying on CODEX-compliant fiber fraction values, and questionnaires tracked the overall complementary food introduction. Bacterial species were identified and quantified via MetaPhlAn2 from metagenomic data, and metabolomic profiles were obtained using 4 LC-MS methods.<br><br>RESULTS: We identified 176 complementary food fiber-bacterial species associations. First plant-based fibers associated with microbiota compositions similar to breastfeeding, and further associated with aromatic amino acid-derived&#xa0;metabolites, including 5-hydroxyindoleacetic acid (total dietary fiber - complementary foods (g) - &#x3b2; = 3.50, CI: 2.48, 4.52, P = 6.53 &#xd7; 10[-5]). Distinct fibers from different food categories showed unique associations with specific bacterial taxa. Key species, such as Faecalibacterium prausnitznii, associated with oat fibers (g/MJ, &#x3b2; = 2.18, confidence interval: 1.36, 2.84, P = 6.12 &#xd7; 10[-6]), reflective of maturing microbial communities. Fiber intake during weaning associated with shifts in metabolite profiles, including immunomodulatory metabolites, with fiber effects observed in a source- and timing-dependent manner, implicated in gradual microbiome diversification.<br><br>CONCLUSIONS: Introducing complementary dietary fibers during the weaning period supports gut microbiome diversification and stabilization. Even minor dietary variations shows significant associations with microbial taxa and functions from the onset of weaning, highlighting the importance of infant dietary recommendations that support the gut microbiome maturation during early life. This trial was registered at clinicaltrials.gov as registration number NCT01735123.}, }
@article {pmid39551294, year = {2024}, author = {Zhang, G and Du, J and Zhang, C and Zhao, Z and Chen, Y and Liu, M and Chen, J and Fan, G and Ma, L and Li, S and Liu, K}, title = {Identification of a PET hydrolytic enzyme from the human gut microbiome unveils potential plastic biodegradation in human digestive tract.}, journal = {International journal of biological macromolecules}, volume = {283}, number = {Pt 3}, pages = {137732}, doi = {10.1016/j.ijbiomac.2024.137732}, pmid = {39551294}, issn = {1879-0003}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Polyethylene Terephthalates/metabolism/chemistry ; *Biodegradation, Environmental ; Hydrolysis ; Gastrointestinal Tract/microbiology/metabolism ; Metagenome ; Hydrolases/metabolism/genetics ; Plastics/chemistry ; Nanoparticles/chemistry ; }, abstract = {Widespread use of polyethylene terephthalate (PET) plastics and their recycling challenges have led to substantial accumulation of PET wastes in global environments, with inevitable consequences for their entry into the food chains. Recent studies have increasingly documented the ingestion of microplastics by humans through food and beverages. However, the fate of these microplastics within the gastrointestinal tract, particularly the role of the human gut microbiota, remains inadequately understood. To address this knowledge gap, we employed a bioinformatics workflow integrated with functional verification to investigate the PET digestion/degradation capabilities of intestinal microorganisms. This approach identified a novel PET hydrolase-HGMP01 from the human gut metagenome, which exhibits the capacity to hydrolyze PET nanoparticles. Moreover, comprehensive exploration for HGMP01 homologues in the human gut metagenome and metatranscriptome unveil their distribution in diverse intestinal microorganisms. This study provides biochemical evidence for an unforeseen role of human gut microbiome in plastic digestion, thus holding substantial implications for human health.}, }
@article {pmid39551110, year = {2025}, author = {Adenaike, AS and Akpan, U and Oyedun, IO and Adewole, FA and Agbaje, M and Olusanya, OM and Arowosegbe, MO and Ikeobi, CON}, title = {Gut microbial composition differs among FUNAAB Alpha broiler chicken genotypes raised in a tropical environment.}, journal = {Microbial pathogenesis}, volume = {198}, number = {}, pages = {107126}, doi = {10.1016/j.micpath.2024.107126}, pmid = {39551110}, issn = {1096-1208}, mesh = {Animals ; *Chickens/microbiology ; *Gastrointestinal Microbiome/genetics ; *RNA, Ribosomal, 16S/genetics ; *Genotype ; *Tropical Climate ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics/methods ; Feathers/microbiology ; Bacteroidetes/genetics/isolation &amp; purification/classification ; Phylogeny ; Firmicutes/genetics/isolation &amp; purification/classification ; Actinobacteria/genetics/classification/isolation &amp; purification ; Biodiversity ; DNA, Bacterial/genetics ; Gastrointestinal Tract/microbiology ; }, abstract = {The gut microbiota of FUNAAB Alpha chickens plays a crucial role in determining their overall health and performance. Understanding the various types and diversity of microbiota in the gut of different genotypes of chickens is crucial for enhancing their well-being, productivity, and disease resistance. This study employed 16S rRNA and metagenomics analysis to examine the gut bacteria of three genotypes of FUNAAB Alpha broiler chickens, namely Naked neck, Frizzle, and Normal feather. There were three phyla observed in the three genotypes: Bacteroidetes, Actinobacteria, and Firmicutes. Through the utilisation of 16S rRNA sequencing, we successfully identified and categorised the various microbiota present within the gastrointestinal tract. Our study revealed notable variations in the composition and quantity of microbiota across the three genotypes, suggesting that each genotype possesses a distinct collection of gut bacteria. A wide range of microbiological diversity was observed within the community. Interestingly, the Normal feather chicken exhibited a greater number of operational taxonomic units (OTUs) compared to the Naked neck and Frizzle feather chicken. This study presents significant findings regarding the ceacal microbiota of FUNAAB Alpha chickens, emphasising the variations observed among different genotypes. It is crucial to study composition-modification techniques to enhance host health and performance, as well as to control zoonotic pathogens that can contaminate poultry products and threaten consumers' health.}, }
@article {pmid39550955, year = {2024}, author = {Liu, S and Cao, J and Yu, J and Jian, M and Zou, L}, title = {Microplastics exacerbate the ecological risk of antibiotic resistance genes in wetland ecosystem.}, journal = {Journal of environmental management}, volume = {372}, number = {}, pages = {123359}, doi = {10.1016/j.jenvman.2024.123359}, pmid = {39550955}, issn = {1095-8630}, mesh = {*Wetlands ; *Drug Resistance, Microbial/genetics ; *Microplastics/toxicity ; China ; Ecosystem ; Lakes/microbiology ; }, abstract = {Wetlands are vital components of the global ecosystem, significantly influencing the retention and dissemination of microplastics (MPs) and antibiotic resistance genes (ARGs). However, the effects of different types of MPs on the environmental dynamics of ARGs within these ecosystems remain poorly understood. This study focused on the distribution and composition of ARGs associated with two primary types of MPs-polyethylene and polypropylene-within the Poyang Lake wetland, the largest freshwater lake in China, utilizing metagenomic analysis. The findings demonstrated that the bacterial communities and ARG profiles in the plastisphere were markedly distinct from those in the surrounding water. Specifically, thirteen opportunistic pathogens and forty subtypes of ARGs, primarily related to multidrug, bacitracin, and β-lactam resistance, were identified in the plastisphere. Notably, polyethylene exhibited four times more specific ARG subtypes than polypropylene. Procrustes analysis combined with network analysis indicated a lack of strong correlation between ARG abundance and bacterial populations, suggesting potential horizontal transfer of ARGs within the microbiota of the plastisphere. Additionally, three novel and functional β-lactamase genes were identified within this environment. This investigation highlights the role of MPs as reservoirs for ARGs, facilitating their exchange and posing risks to both ecological integrity and human health, thereby underscoring the need for increased attention in future research efforts.}, }
@article {pmid39550949, year = {2024}, author = {Wu, ZL and Shi, WJ and Zhang, L and Xia, ZY and Gou, M and Sun, ZY and Tang, YQ}, title = {Investigating the robustness of microbial communities in municipal sludge anaerobic digestion under organic loading rate disturbance.}, journal = {Journal of environmental management}, volume = {372}, number = {}, pages = {123326}, doi = {10.1016/j.jenvman.2024.123326}, pmid = {39550949}, issn = {1095-8630}, mesh = {*Sewage/microbiology ; Anaerobiosis ; *Bioreactors/microbiology ; Waste Disposal, Fluid/methods ; Bacteria/metabolism/genetics/classification ; Microbiota ; }, abstract = {Anaerobic digestion (AD) frequently encounters disturbances due to variations in organic loading rates (OLRs), which can result in the failure of the sludge treatment process. However, there is a lack of comprehensive studies on the robustness of AD systems against OLR disturbances and the underlying mechanisms. In this study, the responses of reactor performance and active microbial communities in mesophilic AD were investigated and compared under conditions of OLR shock and OLR fluctuation. Statistical analysis confirmed that all reactors recovered from both types of OLR disturbance, indicating both functional and structural robustness of the mesophilic community. Based on metagenomics and metatranscriptomics analyses, it was observed that high diversity within the microbial community led to functional redundancy, which appears to be a key mechanism contributing to the robustness against OLR disturbances. Additionally, for the first time, the potential metabolic diversity of aerobic autotrophy bacteria in AD reactors was identified, including their roles in the utilization of glucose and acetate. Furthermore, the analysis of topological properties within the microbial interaction network was conducted, and the robustness of the community network was verified through the application of random node deletion attacks. The findings from this study provide valuable information for the effective regulation of microbial communities and the design of practical AD systems.}, }
@article {pmid39550746, year = {2025}, author = {Karaca, C and Takcı, HAM}, title = {Role of gut microbiome in developing necrotizing enterocolitis.}, journal = {Folia microbiologica}, volume = {70}, number = {1}, pages = {197-204}, pmid = {39550746}, issn = {1874-9356}, support = {21-13192//Kilis 7 Aral&#x131;k University of Research Project Committee/ ; }, mesh = {Humans ; *Enterocolitis, Necrotizing/microbiology ; *Gastrointestinal Microbiome ; Infant, Newborn ; Feces/microbiology ; RNA, Ribosomal, 16S/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Female ; High-Throughput Nucleotide Sequencing ; Dysbiosis/microbiology ; DNA, Bacterial/genetics ; Metagenomics ; }, abstract = {Necrotizing enterocolitis (NEC) is one of the most devastating intestinal diseases observed in preterm in the first days of life. Researchers have recently focused on potential predictive biomarkers for early and concomitant diagnoses. Thus, we inquired about the linkage of intestinal dysbiosis, one of the most important factors in NEC development to the gut microbiota. In this study, the systematic differences in the bacterial composition between neonates affected by NEC and healthy newborns were highlighted by metagenomic analysis. The next-generation sequencing of the V3-V4 variable region of the 16S rRNA gene and gene-specific qPCR analyzed the untargeted gut microbiota. Total bacteria, total and fecal coliform loads in stool samples with NEC were higher than control. OTU-level relative abundances of NEC infant was characterized by Firmicutes and Bacteroidetes at phylum levels. At the genus level, NEC stool was identified by the lack of Klebsiella and the presence of Roseburia, Blautia, and Parasutterella. Finally, Clostridium fessum was the predominant species of Clostridium genus in disease and healthy specimens at the species level, whereas Clostridium jeddahitimonense was at NEC diagnosis. Despite a strong relationship between pathophysiology and characterization of gut microbiota at a clinical diagnosis of NEC, our results emphasize the broad difficulty in identifying potential biomarkers.}, }
@article {pmid39550371, year = {2024}, author = {Yang, JX and Peng, Y and Yu, QY and Yang, JJ and Zhang, YH and Zhang, HY and Adams, CA and Willing, CE and Wang, C and Li, QS and Han, XG and Gao, C}, title = {Gene horizontal transfers and functional diversity negatively correlated with bacterial taxonomic diversity along a nitrogen gradient.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {128}, pmid = {39550371}, issn = {2055-5008}, mesh = {*Soil Microbiology ; Soil/chemistry ; *Nitrogen/metabolism/pharmacology ; *Biodiversity ; RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/metabolism ; Metagenome ; *Gene Transfer, Horizontal/drug effects ; }, abstract = {Horizontal gene transfer (HGT) mediated diversification is a critical force driving evolutionary and ecological processes. However, how HGT might relate to anthropogenic activity such as nitrogen addition, and its subsequent effect on functional diversity and cooccurrence networks remain unknown. Here we approach this knowledge gap by blending bacterial 16S rRNA gene amplicon and shotgun metagenomes from a platform of cessation of nitrogen additions and continuous nitrogen additions. We found that bacterial HGT events, functional genes, and virus diversities increased whereas bacterial taxonomic diversity decreased by nitrogen additions, resulting in a counterintuitive strong negative association between bacterial taxonomic and functional diversities. Nitrogen additions, especially the ceased one, complexified the cooccurrence network by increasing the contribution of vitamin B12 auxotrophic Acidobacteria, indicating cross-feeding. These findings advance our perceptions of the causes and consequences of the diversification process in community ecology.}, }
@article {pmid39549663, year = {2024}, author = {Méndez, A and Maisto, F and Pavlović, J and Rusková, M and Pangallo, D and Sanmartín, P}, title = {Microbiome shifts elicited by ornamental lighting of granite facades identified by MinION sequencing.}, journal = {Journal of photochemistry and photobiology. B, Biology}, volume = {261}, number = {}, pages = {113065}, doi = {10.1016/j.jphotobiol.2024.113065}, pmid = {39549663}, issn = {1873-2682}, mesh = {*Microbiota ; *Silicon Dioxide/chemistry ; *Bacteria/genetics/radiation effects/isolation &amp; purification/classification ; *Fungi/genetics ; Lighting ; Nanopore Sequencing ; Pilot Projects ; Archaea/genetics/radiation effects ; }, abstract = {Night-time outdoor illumination in combination with natural sunlight can influence the visible phototrophic colonizers (mainly algae) growing on stone facades; however, the effects on the microbiome (invisible to the naked eye) are not clear. The presence of stone-dwelling microbes, such as bacteria, diatoms, fungi, viruses and archaea, drives further biological colonization, which may exacerbate the biodeterioration of substrates. Considering the microbiome is therefore important for conservation of the built heritage. The impact of the following types of lighting on the relative abundance and diversity of the microbiome on granite ashlars was evaluated in a year-long outdoor pilot study: no lighting; lighting with a metal halide lamp (a traditional lighting system currently used to illuminate monuments); and lighting with a novel LED lamp (an environmentally sound prototype lamp with a biostatic effect, halting biological colonization by phototrophs, currently under trial). Culturable fractions of microbiome and whole-genome sequencing by metabarcoding with Oxford Nanopore Sequencing (MinION) was conducted for bacteria and fungi in order to complement both community characterization strategies. In addition, the possible biodeteriorative profiles of the isolated strains, relative to calcium carbonate precipitation/solubilisation and iron oxidation/reduction, were investigated by plate assays. Alpha and beta diversity indexes were also determined, along with the abundance of biocide and antibiotic resistance genes. Culture-dependent microbiological analysis failed to properly show changes in community composition, for which metagenomic approaches like MinION are better suited. Thus, MinION analysis identified shifts in the granite microbiome elicited by ornamental lighting. The novel LED lamp with the biostatic effect on phototrophs caused an increase in the diversity of bacteria and fungi. In this case, the microbiome was more similar to that in the unlit samples. In the samples illuminated by the metal halide lamp, dominance of bacteria was favoured and the presence of fungi was negligible.}, }
@article {pmid39549023, year = {2024}, author = {Xiang, J and Chai, N and Li, L and Hao, X and Linghu, E}, title = {Alterations of Gut Microbiome in Patients with Colorectal Advanced Adenoma by Metagenomic Analyses.}, journal = {The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology}, volume = {35}, number = {11}, pages = {859-868}, pmid = {39549023}, issn = {2148-5607}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Colorectal Neoplasms/microbiology/pathology ; Female ; Male ; *Adenoma/microbiology/pathology ; Middle Aged ; *Dysbiosis/microbiology ; *Feces/microbiology ; *Metagenomics/methods ; Case-Control Studies ; Aged ; Tryptophan/metabolism ; }, abstract = {BACKGROUND/AIMS: Colorectal cancer (CRC) is one of the deadliest cancers worldwide, mostly arising from adenomatous polyps. Mounting evidence has demonstrated that changes in the gut microbiome play key roles in CRC progression, while quite few studies focused on the altered microbiota architecture of advanced adenoma (AA), a crucial precancerous stage of CRC. Thus, we aimed to investigate the microbial profiles of AA patients.<br><br>MATERIALS AND METHODS: Fecal samples were collected from 26 AA patients and 26 age- and sex-matched normal controls (NC), and analyzed by shotgun metagenomic sequencing.<br><br>RESULTS: Gut microbial dysbiosis was observed in AA patients with lower alpha diversity. Advanced adenoma was characterized by an increased Bacillota/Bacteroidota ratio and higher Pseudomonadota levels compared to normal individuals. Linear discriminant analysis effect size (LEfSe) analysis was performed and identified 14 microbiota with significantly different abundance levels between AA and NC groups. Functional analysis revealed that tryptophan metabolism was upregulated in AA. Correspondingly, the expressions of gut microbes implicated in tryptophan metabolism also changed, including Akkermansia muciniphila, Bacteroides ovatus, Clostridium sporogenes, and Limosilactobacillus reuteri. The microbial network suggested that AA exhibited decreased correlation complexity, with Escherichia coli and Enterobacteriaceae unclassified harboring the strongest connectivity. A diagnostic model consisting of 3 microbial species was established based on random forest, yielding an area under the curve (AUC) of 0.799.<br><br>CONCLUSION: Our study profiled the alterations of the gut microbiome in AA patients, which may enrich the knowledge of microbial signatures along with colorectal tumorigenesis and provide promising biomarkers for AA diagnosis.}, }
@article {pmid39548565, year = {2024}, author = {Grønbæk, IMB and Mollerup, S and Halkjær, SI and Paulsen, SJ and Pinholt, M and Westh, H and Petersen, AM}, title = {Faecal sample storage without ethanol for up to 24 h followed by freezing performs better than storage with ethanol for shotgun metagenomic microbiome analysis in patients with inflammatory and non-inflammatory intestinal diseases and healthy controls.}, journal = {BMC research notes}, volume = {17}, number = {1}, pages = {340}, pmid = {39548565}, issn = {1756-0500}, mesh = {Humans ; *Feces/microbiology ; *Ethanol ; *Gastrointestinal Microbiome/genetics ; *Specimen Handling/methods ; *Freezing ; Male ; Adult ; *Inflammatory Bowel Diseases/microbiology ; Female ; Metagenomics/methods ; Middle Aged ; Metagenome ; Case-Control Studies ; }, abstract = {OBJECTIVE: The influence of different faecal collection methods on metagenomic analyses remains under discussion, and there is no general agreement on which collection method is preferable for gut microbiome research. We compared faecal samples collected in tubes without preservatives with those containing 10 mL of 96% ethanol for gut microbiome research when the timeframe from defecation to freezing at - 80 °C was up to 24 h. We aimed to compare the collection methods on faeces from participants with inflammatory and non-inflammatory gastrointestinal disorders and healthy controls to investigate the most suitable method when considering data yield, human fraction of sequencing reads, and ease of use. We also examined the faecal sample homogeneity.<br><br>RESULTS: Faeces collected in tubes without preservatives resulted in more sequencing reads compared to faeces collected in tubes with 96% ethanol and were also easier to handle. The human fraction of total reads in faeces collected in ethanol from participants with inflammatory bowel disease was higher than all other samples. DNA extraction and sequencing from two different locations in the same faecal sample gave similar results and showed sample homogeneity.}, }
@article {pmid39547283, year = {2025}, author = {Zelasko, S and Swaney, MH and Sandstrom, S and Lee, KE and Dixon, J and Riley, C and Watson, L and Godfrey, JJ and Ledrowski, N and Rey, F and Safdar, N and Seroogy, CM and Gern, JE and Kalan, L and Currie, C}, title = {Early-life upper airway microbiota are associated with decreased lower respiratory tract infections.}, journal = {The Journal of allergy and clinical immunology}, volume = {155}, number = {2}, pages = {436-450}, doi = {10.1016/j.jaci.2024.11.008}, pmid = {39547283}, issn = {1097-6825}, support = {U19 AI104317/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Microbiota ; *Respiratory Tract Infections/microbiology/immunology ; Infant ; Female ; Male ; Mouth/microbiology ; Child, Preschool ; *Respiratory System/microbiology ; }, abstract = {BACKGROUND: Microbial interactions mediating colonization resistance play key roles within the human microbiome, shaping susceptibility to infection from birth. The role of the nasal and oral microbiome in the context of early life respiratory infections and subsequent allergic disease risk remains understudied.<br><br>OBJECTIVES: Our aim was to gain insight into microbiome-mediated defenses and respiratory pathogen colonization dynamics within the upper respiratory tract during infancy.<br><br>METHODS: We performed shotgun metagenomic sequencing of nasal (n&#xa0;= 229) and oral (n&#xa0;= 210) microbiomes from our Wisconsin Infant Study Cohort at age 24 months and examined the influence of participant demographics and exposure history on microbiome composition. Detection of viral and bacterial respiratory pathogens by RT-PCR and culture-based studies with antibiotic susceptibility testing, respectively, to assess pathogen carriage was performed. Functional bioassays were used to evaluate pathogen inhibition by respiratory tract commensals.<br><br>RESULTS: Participants with early-life lower respiratory tract infection were more likely to be formula fed, attend day care, and experience wheezing. Composition of the nasal, but not oral, microbiome associated with prior lower respiratory tract infection, namely lower alpha diversity, depletion of Prevotella, and enrichment of Moraxella catarrhalis including drug-resistant strains. Prevotella originating from healthy microbiomes had higher biosynthetic gene cluster abundance and exhibited contact-independent inhibition of M catarrhalis.<br><br>CONCLUSIONS: These results suggest interbacterial competition affects nasal pathogen colonization. This work advances understanding of protective host-microbe interactions occurring in airway microbiomes that alter infection susceptibility in early life.}, }
@article {pmid39546167, year = {2024}, author = {Rajeev, M and Cho, JC}, title = {Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture.}, journal = {Journal of microbiology (Seoul, Korea)}, volume = {62}, number = {11}, pages = {985-997}, pmid = {39546167}, issn = {1976-3794}, mesh = {*Aquaculture ; *RNA, Ribosomal, 16S/genetics ; *Rhodobacteraceae/genetics/classification/isolation &amp; purification/metabolism ; Animals ; Republic of Korea ; China ; Metagenomics ; Vietnam ; Phylogeny ; Microbiota ; Metagenome ; Seawater/microbiology ; }, abstract = {Bioflocs are microbial aggregates primarily composed of heterotrophic bacteria that play essential ecological roles in maintaining animal health, gut microbiota, and water quality in biofloc aquaculture systems. Despite the global adoption of biofloc aquaculture for shrimp and fish cultivation, our understanding of biofloc microbiota-particularly the dominant bacterial members and their ecological functions-remains limited. In this study, we employed integrated metataxonomic and metagenomic approaches to demonstrate that the family Rhodobacteraceae of Alphaproteobacteria consistently dominates the biofloc microbiota and plays essential ecological roles. We first analyzed a comprehensive metataxonomic dataset consisting of 200 16S rRNA gene amplicons collected across three Asian countries: South Korea, China, and Vietnam. Taxonomic investigation identified Rhodobacteraceae as the dominant and consistent bacterial members across the datasets. The predominance of this taxon was further validated through metagenomics approaches, including read taxonomy and read recruitment analyses. To explore the ecological roles of Rhodobacteraceae, we applied genome-centric metagenomics, reconstructing 45 metagenome-assembled genomes. Functional annotation of these genomes revealed that dominant Rhodobacteraceae genera, such as Marivita, Ruegeria, Dinoroseobacter, and Aliiroseovarius, are involved in vital ecological processes, including complex carbohydrate degradation, aerobic denitrification, assimilatory nitrate reduction, ammonium assimilation, and sulfur oxidation. Overall, our study reveals that the common practice of carbohydrate addition in biofloc aquaculture systems fosters the growth of specific heterotrophic bacterial communities, particularly Rhodobacteraceae. These bacteria contribute to maintaining water quality by removing toxic nitrogen and sulfur compounds and enhance animal health by colonizing gut microbiota and exerting probiotic effects.}, }
@article {pmid39545702, year = {2024}, author = {Zhang, M and Ma, L and Luo, J and Ren, T and Liu, S and Pan, L and Bao, Y and Li, F and Dai, Y and Pi, Z and Yue, H and Zheng, F}, title = {Low-Medium Polarity Ginsenosides from Wild Ginseng Improves Immunity by Activating the AhR/MAPK Pathway through Tryptophan Metabolism Driven by Gut Microbiota.}, journal = {Journal of agricultural and food chemistry}, volume = {72}, number = {47}, pages = {26142-26154}, doi = {10.1021/acs.jafc.4c06019}, pmid = {39545702}, issn = {1520-5118}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Panax/chemistry ; Mice ; *Tryptophan/metabolism ; *Ginsenosides/pharmacology/administration &amp; dosage ; *Plant Extracts/pharmacology/administration &amp; dosage ; *Receptors, Aryl Hydrocarbon/metabolism/genetics ; Male ; Bacteria/classification/genetics/metabolism/isolation &amp; purification/drug effects ; Humans ; Immunity/drug effects ; MAP Kinase Signaling System/drug effects ; Spleen/drug effects/metabolism/immunology ; Intestinal Mucosa/metabolism/immunology/drug effects ; Mice, Inbred BALB C ; }, abstract = {The gut microbiota contribute significantly to the immune system. Low-medium polarity ginsenosides from wild ginseng (LWG) have potential immunomodulatory effects. However, how the LWG regulates gut microbiota to enhance immunity remains unclear. To explore the interaction between gut microbes and metabolites mediating LWG's immunomodulatory effects, this study examined LWG's impact on splenocytes and CTX-induced immunosuppressed mice. Metabolomic and metagenomic analyses were conducted in vivo to explore the mechanism by which LWG regulates gut microbiota to enhance immunity. In vitro data suggest that LWG at 4 μg/mL enhances the splenocyte activity. Furthermore, LWG effectively reduces symptoms in immunocompromised mice, including weight loss and intestinal mucosal damage. LWG alleviated gut microbiota disturbance, restored tryptophan metabolites (IA, IAA, and IPA), and significantly increased JNK, ERK, and p38MAPK protein levels, which were downstream of AhR. Our study demonstrated that LWG improves the immunity by reshaping gut microbiota, restoring intestinal mucosa, and boosting the gut microbiota-related metabolism of tryptophan to activate the AhR/MAPK pathway. This research offers new insights into the mechanism by which LWG regulates immune function.}, }
@article {pmid39544492, year = {2024}, author = {Xiao, S and Zhou, W and Caldwell, R and Decker, S and Oh, J and Milstone, AM}, title = {Association of Neonatal and Maternal Nasal Microbiome Among Neonates in the Intensive Care Unit.}, journal = {Open forum infectious diseases}, volume = {11}, number = {11}, pages = {ofae644}, pmid = {39544492}, issn = {2328-8957}, abstract = {The neonatal nasal microbiota may help protect neonates in the neonatal intensive care unit from pathogen colonization and infection. This preliminary study characterized the biodiversity of nasal microbiota comparing neonates in the neonatal intensive care unit and their mothers, highlighting the potential of strain sharing between mother-neonate pairs.}, }
@article {pmid39544283, year = {2024}, author = {Li, S and Fan, S and Ma, Y and Xia, C and Yan, Q}, title = {Influence of gender, age, and body mass index on the gut microbiota of individuals from South China.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1419884}, pmid = {39544283}, issn = {2235-2988}, mesh = {Humans ; *Body Mass Index ; China ; Female ; Male ; Adult ; Middle Aged ; *Gastrointestinal Microbiome/genetics ; Age Factors ; *Feces/microbiology ; Sex Factors ; Young Adult ; Aged ; Bacteria/classification/genetics/isolation &amp; purification ; Phylogeny ; }, abstract = {BACKGROUND: The symbiotic gut microbiota is pivotal for human health, with its composition linked to various diseases and metabolic disorders. Despite its significance, there remains a gap in systematically evaluating how host phenotypes, such as gender, age, and body mass index (BMI), influence gut microbiota.<br><br>We conducted an analysis of the gut microbiota of 185 Chinese adults based on whole-metagenome shotgun sequencing of fecal samples. Our investigation focused on assessing the effects of gender, age, and BMI on gut microbiota across three levels: diversity, gene/phylogenetic composition, and functional composition. Our findings suggest that these phenotypes have a minor impact on shaping the gut microbiome compared to enterotypes, they do not correlate significantly within- or between-sample diversity. We identified a substantial number of phenotype-associated genes and metagenomic linkage groups (MLGs), indicating variations in gut microflora composition. Specifically, we observed a decline in beneficial Firmicutes microbes, such as Eubacterium, Roseburia, Faecalibacterium and Ruminococcus spp., in both older individuals and those with higher BMI, while potentially harmful microbes like Erysipelotrichaceae, Subdoligranulum and Streptococcus spp. increased with age. Additionally, Blautia and Dorea spp. were found to increase with BMI, aligning with prior research. Surprisingly, individuals who were older or overweight exhibited a lack of Bacteroidetes, a dominant phylum in the human gut microbiota that includes opportunistic pathogens, while certain species of the well-known probiotics Bifidobacterium were enriched in these groups, suggesting a complex interplay of these bacteria warranting further investigation. Regarding gender, several gender-associated MLGs from Bacteroides, Parabacteroides, Clostridium and Akkermansia were enriched in females. Functional analysis revealed a multitude of phenotype-associated KEGG orthologs (KOs).<br><br>CONCLUSIONS/SIGNIFICANCE: Our study underscores the influence of gender, age, and BMI on gut metagenomes, affecting both phylogenetic and functional composition. However, further investigation is needed to elucidate the precise roles of these bacteria, including both pathogens and probiotics.}, }
@article {pmid39544279, year = {2024}, author = {Hong, R and Lin, S and Zhang, S and Yi, Y and Li, L and Yang, H and Du, Z and Cao, X and Wu, W and Ren, R and Yao, X and Xie, B}, title = {Pathogen spectrum and microbiome in lower respiratory tract of patients with different pulmonary diseases based on metagenomic next-generation sequencing.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1320831}, pmid = {39544279}, issn = {2235-2988}, mesh = {Humans ; *High-Throughput Nucleotide Sequencing ; *Microbiota/genetics ; *Metagenomics/methods ; Middle Aged ; Female ; Male ; Lung Diseases/microbiology ; Aged ; Lung/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Adult ; Respiratory System/microbiology ; Metagenome/genetics ; }, abstract = {INTRODUCTION: The homeostasis of the microbiome in lower respiratory tract is crucial in sustaining normal physiological functions of the lung. Different pulmonary diseases display varying degrees of microbiome imbalance; however, the specific variability and clinical significance of their microbiomes remain largely unexplored.<br><br>METHODS: In this study, we delineated the pathogen spectrum and commensal microorganisms in the lower respiratory tract of various pulmonary diseases using metagenomic sequencing. We analyzed the disparities and commonalities of the microbial features and examined their correlation with disease characteristics.<br><br>RESULTS: We observed distinct pathogen profiles and a diversity in lower airway microbiome in patients diagnosed with cancer, interstitial lung disease, bronchiectasis, common pneumonia, Nontuberculous mycobacteria (NTM) pneumonia, and severe pneumonia.<br><br>DISCUSSION: This study illustrates the utility of Metagenomic Next-generation Sequencing (mNGS) in identifying pathogens and analyzing the lower respiratory microbiome, which is important for understanding the microbiological aspect of pulmonary diseases and essential for their early and precise diagnosis.}, }
@article {pmid39544117, year = {2024}, author = {Roslund, MI and Galitskaya, P and Saarenpää, M and Sinkkonen, A}, title = {Cultivar-dependent differences in plant bud microbiome and functional gene pathways in woody plants commonly used in urban green space.}, journal = {Letters in applied microbiology}, volume = {77}, number = {12}, pages = {}, doi = {10.1093/lambio/ovae110}, pmid = {39544117}, issn = {1472-765X}, support = {346&#x2009;136//Strategic Research Council/ ; }, mesh = {*Microbiota ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; Metagenome ; Archaea/genetics/classification ; Plants/microbiology ; Humans ; Phylogeny ; Metagenomics ; }, abstract = {Plant richness and microbiota have been associated with plant health; hardly any studies have investigated how plant taxa differs in microbiota in the context of human health. We investigated the microbial differences in buds of 83 woody plant taxa used in urban green spaces in hemiboreal climate, using 16S rRNA and whole metagenome shotgun sequencing. Bud microbial community was the richest in Cotoneaster Nanshan and C. integerrimus, and Malus domestica cultivars "Sandra" and "Lobo" and poorest in Ribes glandulosum. Metagenomic shotgun sequencing of two M. domestica and four Ribes varieties confirmed differences in taxa in bud microbiota and indicated higher siderophore synthesis in Malus. Microbial richness, including bacteria, archaea, and viruses, and functional richness of gene pathways was higher in Malus compared to Ribes. The 10 most abundant amplicon sequence units, often referred as species, belonged to the phylum Proteobacteria. The differences between plant taxa were evident in classes Alpha- and Gammaproteobacteria, known for potential human health benefits. Since environmental microbiota contributes to human microbiota and immunoregulation, horticultural cultivars hosting rich microbiota may have human health benefits. Further studies are needed to confirm the effectiveness of microbially-oriented plant selection in optimizing human microbiota and planetary health.}, }
@article {pmid39543873, year = {2025}, author = {Saraswat, I and Goel, A}, title = {Therapeutic Modulation of the Microbiome in Oncology: Current Trends and Future Directions.}, journal = {Current pharmaceutical biotechnology}, volume = {26}, number = {5}, pages = {680-699}, pmid = {39543873}, issn = {1873-4316}, mesh = {Humans ; *Neoplasms/microbiology/therapy/immunology ; Probiotics/therapeutic use ; *Gastrointestinal Microbiome/drug effects ; Animals ; *Microbiota/drug effects ; }, abstract = {Cancer is a predominant cause of mortality worldwide, necessitating the development of innovative therapeutic techniques. The human microbiome, particularly the gut microbiota, has become a significant element in cancer research owing to its essential role in sustaining health and influencing disease progression. This review examines the microbiome's makeup and essential functions, including immunological modulation and metabolic regulation, which may be evaluated using sophisticated methodologies such as metagenomics and 16S rRNA sequencing. The microbiome influences cancer development by promoting inflammation, modulating the immune system, and producing carcinogenic compounds. Dysbiosis, or microbial imbalance, can undermine the epithelial barrier and facilitate cancer. The microbiome influences chemotherapy and radiation results by modifying drug metabolism, either enhancing or reducing therapeutic efficacy and contributing to side effects and toxicity. Comprehending these intricate relationships emphasises the microbiome's significance in oncology and accentuates the possibility for microbiome-targeted therapeutics. Contemporary therapeutic approaches encompass the utilisation of probiotics and dietary components to regulate the microbiome, enhance treatment efficacy, and minimise unwanted effects. Advancements in research indicate that personalised microbiome-based interventions, have the potential to transform cancer therapy, by providing more effective and customised treatment alternatives. This study aims to provide a comprehensive analysis of the microbiome's influence on the onset and treatment of cancer, while emphasising current trends and future possibilities for therapeutic intervention.}, }
@article {pmid39543781, year = {2024}, author = {Samuthpongtorn, C and Chan, AA and Ma, W and Wang, F and Nguyen, LH and Wang, DD and Okereke, OI and Huttenhower, C and Chan, AT and Mehta, RS}, title = {F. prausnitzii potentially modulates the association between citrus intake and depression.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {237}, pmid = {39543781}, issn = {2049-2618}, support = {U01 CA176726 to WW/CA/NCI NIH HHS/United States ; U01 CA176726/CA/NCI NIH HHS/United States ; R01MH091448/NH/NIH HHS/United States ; U01 CA176726 to WW/NH/NIH HHS/United States ; R01 NR019992/NR/NINR NIH HHS/United States ; R01 AG077489/AG/NIA NIH HHS/United States ; R00 DK119412/DK/NIDDK NIH HHS/United States ; }, mesh = {*Gastrointestinal Microbiome ; Humans ; Female ; *Depression/microbiology ; Male ; *Citrus ; *Feces/microbiology ; Middle Aged ; *Faecalibacterium prausnitzii/genetics ; Diet ; Adult ; Metagenomics ; Longitudinal Studies ; S-Adenosylmethionine/metabolism ; Monoamine Oxidase/genetics/metabolism ; Prospective Studies ; }, abstract = {BACKGROUND: The gut microbiome modulates the effects of diet on host health, but it remains unclear which specific foods and microbial features interact to influence risk of depression. To understand this interplay, we leveraged decades of dietary and depression data from a longitudinal cohort of women (n = 32,427), along with fecal metagenomics and plasma metabolomics from a substudy (n = 207) nested in this cohort, as well as an independent validation cohort of men (n = 307).<br><br>RESULTS: We report that citrus intake and its components are prospectively associated with a lower risk of depression and altered abundance of 15 gut microbial species, including enriched Faecalibacterium prausnitzii. In turn, we found a lower abundance of F. prausnitzii and its metabolic pathway, S-adenosyl-L-methionine (SAM) cycle I in participants with depression. To explore causality, we found that lower SAM production by F. prausnitzii may decrease intestinal monoamine oxidase A gene expression implicated in serotonin and dopamine synthesis.<br><br>CONCLUSIONS: These data underscore the role of diet in the prevention of depression and offer a plausible explanation for how the intestinal microbiome modulates the influence of citrus on mental health. Video Abstract.}, }
@article {pmid39543780, year = {2024}, author = {Zhao, XD and Gao, ZY and Peng, J and Konstantinidis, KT and Zhang, SY}, title = {Various microbial taxa couple arsenic transformation to nitrogen and carbon cycling in paddy soils.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {238}, pmid = {39543780}, issn = {2049-2618}, mesh = {*Soil Microbiology ; *Arsenic/metabolism ; *Bacteria/metabolism/classification/genetics ; *Oryza/metabolism ; *Nitrogen/metabolism ; *Oxidation-Reduction ; *Archaea/metabolism/genetics/classification ; *Soil/chemistry ; Carbon/metabolism ; Carbon Cycle ; Microbiota ; Arsenites/metabolism ; Arsenates/metabolism ; }, abstract = {BACKGROUND: Arsenic (As) metabolism pathways and their coupling to nitrogen (N) and carbon (C) cycling contribute to elemental biogeochemical cycling. However, how whole-microbial communities respond to As stress and which taxa are the predominant As-transforming bacteria or archaea in situ remains unclear. Hence, by constructing and applying ROCker profiles to precisely detect and quantify As oxidation (aioA, arxA) and reduction (arrA, arsC1, arsC2) genes in short-read metagenomic and metatranscriptomic datasets, we investigated the dominant microbial communities involved in arsenite (As(III)) oxidation and arsenate (As(V)) reduction and revealed their potential pathways for coupling As with N and C in situ in rice paddies.<br><br>RESULTS: Five ROCker models were constructed to quantify the abundance and transcriptional activity of short-read sequences encoding As oxidation (aioA and arxA) and reduction (arrA, arsC1, arsC2) genes in paddy soils. Our results revealed that the sub-communities carrying the aioA and arsC2 genes were predominantly responsible for As(III) oxidation and As(V) reduction, respectively. Moreover, a newly identified As(III) oxidation gene, arxA, was detected in genomes assigned to various phyla and showed significantly increased transcriptional activity with increasing soil pH, indicating its important role in As(III) oxidation in alkaline soils. The significant correlation of the transcriptional activities of aioA with the narG and nirK denitrification genes, of arxA with the napA and nirS denitrification genes and of arrA/arsC2 with the pmoA and mcrA genes implied the coupling of As(III) oxidation with denitrification and As(V) reduction with methane oxidation. Various microbial taxa including Burkholderiales, Desulfatiglandales, and Hyphomicrobiales (formerly Rhizobiales) are involved in the coupling of As with N and C metabolism processes. Moreover, these correlated As and N/C genes often co-occur in the same genome and exhibit greater transcriptional activity in paddy soils with As contamination than in those without contamination.<br><br>CONCLUSIONS: Our results revealed the comprehensive detection and typing of short-read sequences associated with As oxidation and reduction genes via custom-built ROCker models, and shed light on the various microbial taxa involved in the coupling of As and N and C metabolism in situ in paddy soils. The contribution of the arxA sub-communities to the coupling of As(III) oxidation with nitrate reduction and the arsC sub-communities to the coupling of As(V) reduction with methane oxidation expands our knowledge of the interrelationships among As, N, and C cycling in paddy soils. Video Abstract.}, }
@article {pmid39543707, year = {2024}, author = {Wang, T and Ruan, Y and Xu, Q and Shen, Q and Ling, N and Vandenkoornhuyse, P}, title = {Effect of plant-derived microbial soil legacy in a grafting system-a turn for the better.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {234}, pmid = {39543707}, issn = {2049-2618}, mesh = {*Soil Microbiology ; *Microbiota ; *Bacteria/classification/genetics/metabolism ; Soil/chemistry ; Metagenome ; }, abstract = {BACKGROUND: Plant-soil feedback arises from microbial legacies left by plants in the soil. Grafting is a common technique used to prevent yield declines in monocultures. Yet, our understanding of how grafting alters the composition of soil microbiota and how these changes affect subsequent crop performance remains limited. Our experiment involved monoculturing ungrafted and grafted watermelons to obtain conditioned soils, followed by growing the watermelons on the conditioned soils to investigate plant-soil feedback effects.<br><br>RESULTS: Ungrafted plants grew better in soil previously conditioned by a different plant (heterospecific soil) while grafted plants grew better in soil conditioned by the same plant (conspecific soil). We demonstrated experimentally that these differences in growth were linked to changes in microorganisms. Using a supervised machine learning algorithm, we showed that differences in the relative abundance of certain genera, such as Rhizobium, Chryseobacterium, Fusarium, and Aspergillus, significantly influenced the conspecific plant-soil feedback. Metabolomic analyses revealed that ungrafted plants in heterospecific soil enriched arginine biosynthesis, whereas grafted plants in conspecific soil increased sphingolipid metabolism. Elsewhere, the metagenome-assembled genomes (MAGs) of ungrafted plants identified in heterospecific soil include Chryseobacterium and Lysobacter, microorganisms having been prominently identified in earlier research as contributors to plant growth. Metabolic reconstruction revealed the putative ability of Chryseobacterium to convert D-glucono-1,5-lactone to gluconic acid, pointing to distinct disease-suppressive mechanisms and hence distinct microbial functional legacies between grafted and ungrafted plants.<br><br>CONCLUSIONS: Our findings show a deep impact of the soil microbial reservoir on plant growth and suggest the necessity to protect and improve this microbial community in agricultural soils. The work also suggests possibilities of optimizing microbiota-mediated benefits through grafting herein, a way that "engineered" soil microbial communities for better plant growth. Video Abstract.}, }
@article {pmid39543265, year = {2024}, author = {Stevens, BR and Roesch, LFW}, title = {Interplay of human ABCC11 transporter gene variants with axillary skin microbiome functional genomics.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {28037}, pmid = {39543265}, issn = {2045-2322}, mesh = {Humans ; *Microbiota/genetics ; *Polymorphism, Single Nucleotide ; *Skin/microbiology/metabolism ; Female ; *ATP-Binding Cassette Transporters/genetics/metabolism ; Male ; Haplotypes ; Genomics/methods ; Axilla/microbiology ; Adult ; Pedigree ; }, abstract = {The human armpit microbiome is metabolically entangled with skin cell physiology. This "meta-organism" symbiotic mutualism results in sweat either with or without odor (osmidrosis), depending on host ABCC11 gene haplotypes. Apocrine metabolism produces odorless S-glutathione conjugate that is transferred by ABCC11 transporters into secretory vesicles, deglutamylated to S-Cys-Gly-3M3SH thiol, and exuded to skin surface. An anthropogenic clade of skin bacteria then takes up the thiol and bioconverts it to malodorous 3-methyl-3-sulfanylhexan-1-ol (3M3SH). We hypothesized a familial meta-organism association of human ABCC11 gene non-synonymous SNP rs17822931 interplaying with skin microbiome 3M3SH biosynthesis. Subjects were genotyped for ABCC11 SNPs, and their haplotypes were correlated with axilla microbiome DNA sequencing profiles and predicted metagenome functions. A multigeneration family pedigree revealed a Mendelian autosomal recessive pattern: the C allele of ABCC11 correlated with bacterial Cys-S-conjugate β-lyase (PatB) gene known for Staphylococcus hominis biosynthesis of 3M3SH from human precursor; PatB was rescinded in hosts with homozygous TT alleles encoding ABCC11 loss-of-function mutation. We posit that a C allele encoding functional ABCC11 is key to delivering host conjugate precursors that shape heritable skin niche conditions favorable to harboring Staphylococcus having genomics of odor thiol production. This provides existential insights into human evolution and global regional population ancestries.}, }
@article {pmid39543167, year = {2024}, author = {Sumithra, TG and Sharma, SRK and Suresh, G and Suja, G and Prasad, V and Gop, AP and Patil, PK and Gopalakrishnan, A}, title = {Gut microbes of a high-value marine fish, Snubnose Pompano (Trachinotus blochii) are resilient to therapeutic dosing of oxytetracycline.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {27949}, pmid = {39543167}, issn = {2045-2322}, support = {Grant No. CIBA/AINP-FH/2015-16//Indian Council of Agricultural Research/ ; BT/AAQ/3/SP28267/2018//Department of Biotechnology, Ministry of Science and Technology, India/ ; }, mesh = {*Oxytetracycline/pharmacology ; Animals ; *Gastrointestinal Microbiome/drug effects ; *Anti-Bacterial Agents/pharmacology ; Fishes/microbiology ; Aquaculture/methods ; Dysbiosis/microbiology ; Metagenomics/methods ; Bacteria/drug effects/genetics/classification ; }, abstract = {Trachinotus blochii is a high-value tropical mariculture species. The present study evaluated the gut microbial impact of therapeutic exposure (80 mg/day/kg biomass for 10 days) to oxytetracycline, the most common aquaculture antibiotic in T. blochii. The cultivable counts, α-diversity measures of taxonomic and functional metagenomics, microbial dysbiosis (MD) index, and microbial taxon abundances showed the resilience of gut microbiota at 16-26 days of treatment. A significant reduction in bacterial abundance, diversity measures, Firmicutes and Actinobacteria and an increase in γ-Proteobacteria was recorded on the 6th and 11th day of treatment. The increased metagenomic stress signatures, decreased beneficial bacterial abundances, decreased abundance of microbial pathways on energy metabolism, and MD index indicated short-term transient stress during the initial days of therapeutic withdrawal, warranting health management measures. Therapeutic exposure reduced the abundance of fish pathogens, including Vibrio spp., kanamycin and ampicillin-resistant bacteria. Strikingly, oxytetracycline treatment did not increase tetracycline-resistant bacterial counts and the predicted abundance of tetracycline resistance encoding genes in the gut, illustrating that therapeutic application would not pose a risk in the context of antimicrobial resistance in short term. Altogether, the present study provides a foundation for oxytetracycline treatment to develop suitable risk minimization tactics in sustainable aquaculture.}, }
@article {pmid39542187, year = {2025}, author = {Gurumayum, N and Devi, MB and Khound, P and Bhattacharya, A and Sarma, H and Khan, MR and Devi, R}, title = {Bioactive fraction of Musa balbisiana seed mitigates D-galactose-induced brain aging via SIRT1/PGC-1α/FoxO3a activation and intestinal barrier dysfunction by modulating gut microbiota and core metabolites.}, journal = {Free radical biology &amp; medicine}, volume = {226}, number = {}, pages = {43-55}, doi = {10.1016/j.freeradbiomed.2024.11.016}, pmid = {39542187}, issn = {1873-4596}, mesh = {Animals ; *Galactose/adverse effects/toxicity ; *Gastrointestinal Microbiome/drug effects ; Rats ; *Seeds/chemistry ; *Sirtuin 1/metabolism/genetics ; *Plant Extracts/pharmacology ; *Aging/drug effects ; *Oxidative Stress/drug effects ; *Brain/metabolism/drug effects/pathology ; *Forkhead Box Protein O3/metabolism/genetics ; *Musa/chemistry ; *Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism/genetics ; Male ; Rats, Sprague-Dawley ; Glycation End Products, Advanced/metabolism ; Antioxidants/pharmacology/metabolism ; }, abstract = {Aging is an inevitable biological process, and emerging research has highlighted the potential of dietary and pharmacological interventions to decelerate the trajectory of age-related diseases and prolong the health span. This study evaluates the protective effects of Musa balbisiana seed on healthy aging using D-galactose-induced accelerated aging rats. The results suggested that the bioactive ethyl acetate fraction of Musa balbisiana seed extract (BF) exhibited protective effects against aging-induced oxidative stress by reducing oxidative DNA damage, advanced glycation end-product formation, and malondialdehyde levels while restoring antioxidant and glyoxalase enzyme activities. BF also ameliorated neurodegeneration by decreasing acetylcholinesterase enzyme activity and amyloid beta plaque formation. Histopathological analysis demonstrated the protective effects of BF against brain aging, liver disruption, renal damage, and intestinal barrier dysfunction. BF further restored intestinal permeability by upregulating the tight junctions (zonula occludens 1 and 2, claudin 1,2,3 and 4, and occludin) and mucin (mucin 2 and mucin 5ac) gene expression while downregulating the expression of inflammatory cytokines (IL-1β, IL-6, and TNF-α). BF significantly induced the phosphorylation of FoxO3a proteins and upregulated the gene expression of SIRT1, PGC-1α, and TFAM in the hippocampus. Next-generation sequencing (NGS) of 16s rRNA amplicons of fecal metagenomics DNA and metabolites profiling showed that BF intervention restructured the gut microbiota and altered core metabolites related to cholesterol metabolism. Overall, our findings demonstrated the multifaceted protective effects of Musa balbisiana seed against D-galactose-induced aging.}, }
@article {pmid39541983, year = {2024}, author = {Urtecho, G and Moody, T and Huang, Y and Sheth, RU and Richardson, M and Descamps, HC and Kaufman, A and Lekan, O and Zhang, Z and Velez-Cortes, F and Qu, Y and Cohen, L and Ricaurte, D and Gibson, TE and Gerber, GK and Thaiss, CA and Wang, HH}, title = {Spatiotemporal dynamics during niche remodeling by super-colonizing microbiota in the mammalian gut.}, journal = {Cell systems}, volume = {15}, number = {11}, pages = {1002-1017.e4}, pmid = {39541983}, issn = {2405-4720}, support = {R35 GM143056/GM/NIGMS NIH HHS/United States ; T32 GM007367/GM/NIGMS NIH HHS/United States ; R01 GM130777/GM/NIGMS NIH HHS/United States ; P30 DK132710/DK/NIDDK NIH HHS/United States ; R21 AI146817/AI/NIAID NIH HHS/United States ; R01 DK118044/DK/NIDDK NIH HHS/United States ; R01 AI132403/AI/NIAID NIH HHS/United States ; R01 EB031935/EB/NIBIB NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; Mice ; *Fecal Microbiota Transplantation/methods ; Mice, Inbred C57BL ; Gastrointestinal Tract/microbiology ; Dysbiosis/microbiology ; Mammals/microbiology ; Feces/microbiology ; }, abstract = {While fecal microbiota transplantation (FMT) has been shown to be effective in reversing gut dysbiosis, we lack an understanding of the fundamental processes underlying microbial engraftment in the mammalian gut. Here, we explored a murine gut colonization model leveraging natural inter-individual variations in gut microbiomes to elucidate the spatiotemporal dynamics of FMT. We identified a natural "super-donor" consortium that robustly engrafts into diverse recipients and resists reciprocal colonization. Temporal profiling of the gut microbiome showed an ordered succession of rapid engraftment by early colonizers within 72 h, followed by a slower emergence of late colonizers over 15-30 days. Moreover, engraftment was localized to distinct compartments of the gastrointestinal tract in a species-specific manner. Spatial metagenomic characterization suggested engraftment was mediated by simultaneous transfer of spatially co-localizing species from the super-donor consortia. These results offer a mechanism of super-donor colonization by which nutritional niches are expanded in a spatiotemporally dependent manner. A record of this paper's transparent peer review process is included in the supplemental information.}, }
@article {pmid39541968, year = {2025}, author = {Nishijima, S and Stankevic, E and Aasmets, O and Schmidt, TSB and Nagata, N and Keller, MI and Ferretti, P and Juel, HB and Fullam, A and Robbani, SM and Schudoma, C and Hansen, JK and Holm, LA and Israelsen, M and Schierwagen, R and Torp, N and Telzerow, A and Hercog, R and Kandels, S and Hazenbrink, DHM and Arumugam, M and Bendtsen, F and Brøns, C and Fonvig, CE and Holm, JC and Nielsen, T and Pedersen, JS and Thiele, MS and Trebicka, J and Org, E and Krag, A and Hansen, T and Kuhn, M and Bork, P and , }, title = {Fecal microbial load is a major determinant of gut microbiome variation and a confounder for disease associations.}, journal = {Cell}, volume = {188}, number = {1}, pages = {222-236.e15}, doi = {10.1016/j.cell.2024.10.022}, pmid = {39541968}, issn = {1097-4172}, mesh = {*Feces/microbiology ; Humans ; *Gastrointestinal Microbiome/genetics ; Machine Learning ; Female ; Male ; Metagenomics ; Adult ; Middle Aged ; Metagenome ; *Bacterial Load ; }, abstract = {The microbiota in individual habitats differ in both relative composition and absolute abundance. While sequencing approaches determine the relative abundances of taxa and genes, they do not provide information on their absolute abundances. Here, we developed a machine-learning approach to predict fecal microbial loads (microbial cells per gram) solely from relative abundance data. Applying our prediction model to a large-scale metagenomic dataset (n = 34,539), we demonstrated that microbial load is the major determinant of gut microbiome variation and is associated with numerous host factors, including age, diet, and medication. We further found that for several diseases, changes in microbial load, rather than the disease condition itself, more strongly explained alterations in patients' gut microbiome. Adjusting for this effect substantially reduced the statistical significance of the majority of disease-associated species. Our analysis reveals that the fecal microbial load is a major confounder in microbiome studies, highlighting its importance for understanding microbiome variation in health and disease.}, }
@article {pmid39541817, year = {2024}, author = {Czatzkowska, M and Wolak, I and Harnisz, M and Korzeniewska, E}, title = {Microbial diversity and biosafety judgment of digestates derived from different biogas plants for agricultural applications.}, journal = {Journal of environmental management}, volume = {371}, number = {}, pages = {123329}, doi = {10.1016/j.jenvman.2024.123329}, pmid = {39541817}, issn = {1095-8630}, mesh = {*Biofuels ; *Agriculture ; *Soil Microbiology ; Microbiota ; Biodegradation, Environmental ; Anaerobiosis ; Soil/chemistry ; Bacteria/classification ; }, abstract = {The composition of microbial communities is the key to effective anaerobic digestion (AD). The microbiome driving the AD process has been extensively researched, whereas the influence of specific substrates on the microbiome of digestate remains insufficiently investigated. Digestate has considerable potential for use in soil fertilization and bioremediation, therefore its biological safety should be monitored. Moreover, the knowledge about the composition of microbial communities and their interconnections in digestate should be extended, due to the impact on soil microbiota and its functionality. The aim of this study was a comprehensive assessment of the (1) sanitary quality, (2) core microbiome, and (3) microbial interactions in digestates collected from three full-scale agricultural biogas plants, with particular emphasis on their applicability from the perspective of the resident microbiota. Analyzed samples of digestate were derived from various substrates used for AD, including plant- and animal-based materials, and industrial waste. The study demonstrated that the phyla Bacillota, Bacteroidota, and Cloacimonadota were the most dominant in digestates regardless of the composition of the processed substrates, however, member composition at the genus level differed significantly between samples. In addition, we observed that microbial genera belonging to the less prevalent phyla play an integral role in the forming of microbial community interactions. Dominant microbial taxa with broad metabolic capabilities, potentially improving soil quality and functionality, have been identified. Moreover, we confirmed, that digestate samples were free of analyzed pathogenic bacteria and parasites. The study results indicate that digestate may have an immense fertilizing and bioremediation potential that has not been fully availed of to date.}, }
@article {pmid39541261, year = {2025}, author = {Golob, J and Rao, K and Berinstein, JA and Singh, P and Chey, WD and Owyang, C and Kamada, N and Higgins, PDR and Young, V and Bishu, S and Lee, AA}, title = {Why Symptoms Linger in Quiescent Crohn's Disease: Investigating the Impact of Sulfidogenic Microbes and Sulfur Metabolic Pathways.}, journal = {Inflammatory bowel diseases}, volume = {31}, number = {3}, pages = {763-776}, pmid = {39541261}, issn = {1536-4844}, support = {/CCF/CCF/United States ; K23 DK124567/DK/NIDDK NIH HHS/United States ; R03 DK139095/DK/NIDDK NIH HHS/United States ; K08 DK123403/DK/NIDDK NIH HHS/United States ; DK124567/NH/NIH HHS/United States ; }, mesh = {Humans ; Female ; *Crohn Disease/microbiology/metabolism ; Male ; *Sulfur/metabolism ; Adult ; Feces/microbiology/chemistry ; *Metabolic Networks and Pathways ; *Gastrointestinal Microbiome ; Middle Aged ; Case-Control Studies ; Irritable Bowel Syndrome/microbiology/metabolism ; Metabolomics ; Quality of Life ; Metabolome ; }, abstract = {INTRODUCTION: Even in the absence of inflammation, persistent symptoms in patients with Crohn's disease (CD) are prevalent and worsen quality of life. We previously demonstrated enrichment in sulfidogenic microbes in quiescent Crohn's disease patients with (qCD + S) vs without persistent GI symptoms (qCD-S). Thus, we hypothesized that sulfur metabolic pathways would be enriched in stool while differentially abundant microbes would be associated with important sulfur metabolic pathways in qCD + S.<br><br>METHODS: We performed a multicenter observational study nested within SPARC IBD. Quiescent inflammation was defined by fecal calprotectin level&#x2005;<&#x2005;150 mcg/g. Persistent symptoms were defined by CD-PRO2. Active CD (aCD) and non-IBD diarrhea-predominant irritable bowel syndrome (IBS-D) were included as controls.<br><br>RESULTS: Thirty-nine patients with qCD&#x2005;+&#x2005;S, 274 qCD-S, 21 aCD, and 40 IBS-D underwent paired shotgun metagenomic sequencing and untargeted metabolomic profiling. The fecal metabolome in qCD&#x2005;+&#x2005;S was significantly different relative to qCD-S and IBS-D but not aCD. Patients with qCD&#x2005;+&#x2005;S were enriched in sulfur-containing amino acid pathways, including cysteine and methionine, as well as serine, glycine, and threonine. Glutathione and nicotinate/nicotinamide pathways were also enriched in qCD&#x2005;+&#x2005;S relative to qCD-S, suggestive of mitochondrial dysfunction, a downstream target of H2S signaling. Multi-omic integration demonstrated that enriched microbes in qCD&#x2005;+&#x2005;S were associated with important sulfur metabolic pathways. Bacterial sulfur metabolic genes, including CTH, isfD, sarD, and asrC, were dysregulated in qCD&#x2005;+&#x2005;S. Finally, sulfur metabolites with and without sulfidogenic microbes showed good accuracy in predicting the presence of qCD&#x2005;+&#x2005;S.<br><br>DISCUSSION: Microbial-derived sulfur pathways and downstream mitochondrial function are perturbed in qCD&#x2005;+&#x2005;S, which implicate H2S signaling in the pathogenesis of this condition. Future studies will determine whether targeting H2S pathways results in improved quality of life in qCD&#x2005;+&#x2005;S.}, }
@article {pmid39540836, year = {2024}, author = {Charles, P and Kumar, S and Girish Kumar, CP and Parameswaran, S and Viswanathan, P and Nachiappa Ganesh, R}, title = {Association of gut microbiota with allograft injury in kidney transplant recipients: a comparative profiling through 16S metagenomics and quantitative PCR.}, journal = {Journal of medical microbiology}, volume = {73}, number = {11}, pages = {}, doi = {10.1099/jmm.0.001934}, pmid = {39540836}, issn = {1473-5644}, mesh = {Humans ; *Kidney Transplantation/adverse effects ; *Gastrointestinal Microbiome ; Male ; *RNA, Ribosomal, 16S/genetics ; Female ; Middle Aged ; *Metagenomics/methods ; Adult ; Prospective Studies ; Longitudinal Studies ; *Graft Rejection/microbiology ; Real-Time Polymerase Chain Reaction/methods ; Bacteria/classification/genetics/isolation &amp; purification ; Feces/microbiology ; Allografts/microbiology ; Transplant Recipients ; }, abstract = {Introduction. The existence of a mutual relationship between gut microbiota and immune homeostasis highlights its importance in the context of kidney transplantation.Gap statement. The translational utility of gut microbiota as a biomarker for allograft injury has not been assessed before.Aim. In this study, we aimed to characterize the gut microbial diversity in kidney transplant recipients and investigate the alterations in the gut microbial composition in association with allograft injury such as histopathological graft rejection and calcineurin inhibitor toxicity. In addition, we compared the gut microbial quantitation using 16S metagenomics and quantitative PCR (qPCR) to assess its translational utility.Methodology. In this prospective longitudinal cohort study, we enrolled 38 kidney transplant recipients and collected serial faecal specimens (n=114), once before the induction therapy, and twice after transplant, during the first and third month. We characterized the gut microbial composition through 16S rRNA sequencing and qPCR from the DNA isolates of the samples. The recipients were clinically followed up for a median of 600 days post-transplant. Histopathological evidence of allograft rejection and calcineurin inhibitor toxicity were used for the correlational analysis with gut microbial diversity.Results. Significant differences in the gut microbial diversity were observed between the pre- and post-transplant samples. Pre-transplant gut microbiota revealed a higher relative abundance of phylum Bacteroidetes in the allograft rejection group, and a higher relative abundance of phylum Firmicutes was observed in the histopathological features of calcineurin inhibitor toxicity (hCNI toxicity) group. We found a high concordance between 16S metagenomics and qPCR outputs for assessing the gut microbial diversity. Furthermore, the receiver operating characteristic curve analysis has also proven that the pre-transplant levels of gut microbial dysbiosis, as a potential predictive biomarker for allograft injury.Conclusion. Our pilot study found a strong statistical association of gut microbial dysbiosis with kidney allograft injury, highlighting the potential of gut microbiota as a predictive biomarker and that qPCR serves as a more reliable and economic tool for assessing dysbiosis paving the way for its translational utility.}, }
@article {pmid39540551, year = {2024}, author = {Vepštaitė-Monstavičė, I and Lukša, J and Strazdaitė-Žielienė, &#x17d; and Serva, S and Servienė, E}, title = {Distinct microbial communities associated with health-relevant wild berries.}, journal = {Environmental microbiology reports}, volume = {16}, number = {6}, pages = {e70048}, pmid = {39540551}, issn = {1758-2229}, support = {S-PD-22-85//Lithuanian Research Council (LMTLT)/ ; }, mesh = {*Fruit/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Fungi/classification/genetics/isolation &amp; purification ; *Microbiota ; Vaccinium vitis-idaea/chemistry/microbiology/genetics ; High-Throughput Nucleotide Sequencing ; Rosa/microbiology ; Phylogeny ; }, abstract = {Lingonberries (Vaccinium vitis-idaea L.), rowanberries (Sorbus aucuparia L.) and rosehips (Rosa canina L.) positively affect human health due to their healing properties, determined by a high content of bioactive compounds. The consumption of unprocessed wild berries is relevant and encouraged, making their in-depth microbiological characterization essential for food safety. This study presents the first high-throughput sequencing analysis of bacterial and fungal communities distributed on the surface of lingonberries, rowanberries and rosehips. Significant plant-defined differences in the taxonomic composition of prokaryotic and eukaryotic microbiota were observed. The bacterial community on rosehips was shown to be prevalent by Enterobacteriaceae, lingonberries by Methylobacteriaceae and rowanberries by Sphingomonadaceae representatives. Among the fungal microbiota, Dothioraceae dominated on rosehips and Exobasidiaceae on lingonberries; meanwhile, rowanberries were inhabited by a similar level of a broad spectrum of fungal families. Cultivable yeast profiling revealed that lingonberries were distinguished by the lowest amount and most distinct yeast populations. Potentially pathogenic to humans or plants, as well as beneficial and relevant biocontrol microorganisms, were identified on tested berries. The combination of metagenomics and a cultivation-based approach highlighted the wild berries-associated microbial communities and contributed to uncovering their potential in plant health, food and human safety.}, }
@article {pmid39538984, year = {2024}, author = {Zhang, Y and Song, Z and Schilling, JS}, title = {Evaluation of DNA Extraction Methods for Microbial Community Profiling in Deadwood Decomposition.}, journal = {MicrobiologyOpen}, volume = {13}, number = {6}, pages = {e70007}, pmid = {39538984}, issn = {2045-8827}, support = {//Funding for the study was provided by a Jr. Faculty grant to J.S.S. from the Andrew W. Mellon Foundation (New York, NY)./ ; }, mesh = {*Wood/microbiology ; *Fungi/genetics/classification/isolation &amp; purification ; *Bacteria/genetics/classification/isolation &amp; purification ; *Betula/microbiology ; *DNA, Fungal/genetics ; *Microbiota/genetics ; Pinus/microbiology ; DNA, Bacterial/genetics ; Metagenomics/methods ; Sequence Analysis, DNA/methods ; }, abstract = {As technologies advance alongside metabarcoding and metagenomic resources, particularly for larger fungal genomes, DNA extraction methods must be optimized to meet higher thresholds, especially from complex environmental substrates. This study focused on extracting fungal genomic compounds from woody substrates, a challenge due to the embedment of endophytic and saprotrophic fungi within wood cells, the physical recalcitrance of wood, the adsorption of nucleic acids to wood polymers, and the release of downstream inhibitors. Hypothesizing that cetyltrimethylammonium bromide would be the best option, we compared prominent methods by extracting and sequencing microbial DNA from sound and decayed birch (Betula papyrifera) and pine (Pinus resinosa). DNA quantities varied significantly depending on extraction methods and decay stage. The quality of DNA, in terms of purity and integrity, significantly impacted whether the samples could be amplified and sequenced. However, amplicon sequencing of bacterial and fungal communities revealed no significant extraction bias. This, along with the sequencing effectiveness and cost/time efficiency, indicates that Qiagen is the gold standard for woody substrates. This study increases confidence in published amplicon data sets regardless of the extraction methods, provides a cost-benefit table for making protocol decisions, and offers guidance on fungal DNA extractions from complex organic substrates (sound and decayed wood) that would best suit future metagenomic efforts.}, }
@article {pmid39537963, year = {2024}, author = {Sitthideatphaiboon, P and Somlaw, N and Zungsontiporn, N and Ouwongprayoon, P and Sukswai, N and Korphaisarn, K and Poungvarin, N and Aporntewan, C and Hirankarn, N and Vinayanuwattikun, C and Chanida, V}, title = {Dietary pattern and the corresponding gut microbiome in response to immunotherapy in Thai patients with advanced non-small cell lung cancer (NSCLC).}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {27791}, pmid = {39537963}, issn = {2045-2322}, support = {N35A660426//National Research Council of Thailand/ ; RA-MF-04/67//Rachadapisek Sompote Matching fund, Chulalongkorn University/ ; }, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; *Carcinoma, Non-Small-Cell Lung/drug therapy/microbiology/pathology ; *Diet ; Feces/microbiology ; *Gastrointestinal Microbiome/drug effects ; Immune Checkpoint Inhibitors/therapeutic use ; *Immunotherapy/methods ; *Lung Neoplasms/microbiology/drug therapy/pathology ; Progression-Free Survival ; Prospective Studies ; Southeast Asian People ; Thailand ; }, abstract = {Gut microbiota is considered a key player modulating the response to immune checkpoint inhibitors (ICI) in cancer. The effects of dietary pattern on this interaction is not well-studied. A prospective multicenter cohort of 95 patients with advanced non-small cell lung cancer (NSCLC) undergoing ICI therapy were enrolled. Stool shotgun metagenomic sequencing was performed. Three-day dietary patterns before ICI were assessed. Patients were categorized as hyperprogressive disease (HPD) if they exhibited a time to treatment failure of less than 2 months. All others were categorized as non-hyperprogressive disease (non-HPD). The correlation between dietary patterns, gut microbiome, and response to ICI therapy was analyzed. In the multivariate analysis, a high abundance of Firmicutes unclassified and the Ruminococcaceae family correlated with a significantly diminished progression-free survival (PFS) with an HR of 2.40 [P = 0.006] and 4.30 [P = 0.005], respectively. More specifically, within the subset of NSCLC patients treated solely with ICI therapy, a high abundance of Intestinimonas and the Enterobacteriaceae family were associated with substantially reduced PFS with an HR of 2.61 [P = 0.02] and HR 3.34 [P = 0.005], respectively. In our comprehensive dietary pattern analysis, the HPD group showed increased consumption of cholesterol, sodium, and fats beyond recommended levels compared to the non-HPD group. This group also displayed a tendency towards higher food pattern scores characterized by a high intake of fat and dairy products. Our study revealed a distinct association between the gut microbiome composition and treatment outcomes. The overall composition of diet might be related to ICI therapeutic outcomes.}, }
@article {pmid39537661, year = {2024}, author = {Li, Z and Chen, J and Li, Y and Li, L and Zhan, Y and Yang, J and Wu, H and Li, S and Mo, X and Wang, X and Mi, Y and Zhou, X and Li, Y and Wang, J and Li, Y and Sun, R and Cai, W and Ye, F}, title = {Impact of SARS-CoV-2 infection on respiratory and gut microbiome stability: a metagenomic investigation in long-term-hospitalized COVID-19 patients.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {126}, pmid = {39537661}, issn = {2055-5008}, mesh = {Humans ; *COVID-19/microbiology/virology ; *Gastrointestinal Microbiome/genetics ; *SARS-CoV-2/genetics ; Male ; Middle Aged ; Female ; Aged ; *Metagenomics/methods ; Feces/microbiology/virology ; High-Throughput Nucleotide Sequencing ; Adult ; Hospitalization ; Bacteria/classification/genetics/isolation &amp; purification ; Sputum/microbiology/virology ; Respiratory System/microbiology/virology ; Metagenome ; }, abstract = {During the coronavirus disease 2019 (COVID-19) pandemic, the exploration of microecology has been essential for elucidating the intricacies of infection mechanisms and the recovery of afflicted individuals. To decipher the interplay of microorganisms between the intestinal and respiratory tracts, we collected sputum and throat swabs and feces from COVID-19 patients and explored the mutual migration among intestinal and respiratory microorganisms. Using next-generation sequencing (NGS) technology, we investigated intestinal and respiratory microorganism intermigration in two patients with severe COVID-19 during their hospitalization. Notably, we observed an expedited recovery of microecological equilibrium in one patient harboring Mycobacterium avium. Comparative analyses between 32 healthy controls and 110 COVID-19 patients with different disease severities revealed alterations in predominant microorganisms inhabiting the respiratory and intestinal tracts of COVID-19 patients. Among the alterations, intestinal Bacteroides vulgatus (BV) was identified as a noteworthy microorganism that exhibited marked enrichment in patients with severe COVID-19. BV, when highly abundant, may inhibit the transitional growth of Escherichia coli/Enterococcus, indirectly prevent the overgrowth of salivary streptococci, and maintain lung/intestinal microecology stability. In summary, this study elucidates the bidirectional microbial intermigration between the intestinal and respiratory tracts in COVID-19 patients. These findings are expected to provide new ideas for the treatment and management of COVID-19, underscoring the essential role of microecology in infectious diseases. Nevertheless, a systematic study of the roles of BV in recovery from infection is required to gain a deeper understanding of the mechanisms of microbial migration.}, }
@article {pmid39537082, year = {2024}, author = {Chettri, D and Verma, AK and Chirania, M and Verma, AK}, title = {Metagenomic approaches in bioremediation of environmental pollutants.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {363}, number = {Pt 2}, pages = {125297}, doi = {10.1016/j.envpol.2024.125297}, pmid = {39537082}, issn = {1873-6424}, mesh = {*Biodegradation, Environmental ; *Metagenomics/methods ; *Environmental Pollutants/metabolism ; Artificial Intelligence ; Microbiota ; }, abstract = {Metagenomics has emerged as a pivotal tool in bioremediation, providing a deeper understanding of the structure and function of the microbial communities involved in pollutant degradation. By circumventing the limitations of traditional culture-based methods, metagenomics enables comprehensive analysis of microbial ecosystems and facilitates the identification of new genes and metabolic pathways that are critical for bioremediation. Advanced sequencing technologies combined with computational and bioinformatics approaches have greatly enhanced our ability to detect sources of pollution and monitor dynamic changes in microbial communities during the bioremediation process. These tools enable the precise identification of key microbial players and their functional roles, and provide a deeper understanding of complex biodegradation networks. The integration of artificial intelligence (AI) with machine learning algorithms has accelerated the process of discovery of novel genes associated with bioremediation and has optimized metabolic pathway prediction. Novel strategies, including sequencing techniques and AI-assisted analysis, have the potential to revolutionize bioremediation by enabling the development of highly efficient, targeted, and sustainable remediation strategies for various contaminated environments. However, the complexity of microbial interactions, data interpretation, and high cost of these advanced technologies remain challenging. Future research should focus on improving computational tools, reducing costs, and integrating multidisciplinary approaches to overcome these limitations.}, }
@article {pmid39537028, year = {2025}, author = {Liu, L and Nguyen, SM and Wang, L and Shi, J and Long, J and Cai, Q and Shrubsole, MJ and Shu, XO and Zheng, W and Yu, D}, title = {Associations of alcohol intake with gut microbiome: a prospective study in a predominantly low-income Black/African American population.}, journal = {The American journal of clinical nutrition}, volume = {121}, number = {1}, pages = {134-140}, pmid = {39537028}, issn = {1938-3207}, support = {P30 DK058404/DK/NIDDK NIH HHS/United States ; R01 CA275864/CA/NCI NIH HHS/United States ; P30 CA068485/CA/NCI NIH HHS/United States ; U01 CA202979/CA/NCI NIH HHS/United States ; R01 DK126721/DK/NIDDK NIH HHS/United States ; }, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; *Alcohol Drinking ; *Black or African American ; Feces/microbiology ; *Gastrointestinal Microbiome ; Poverty ; Prospective Studies ; }, abstract = {BACKGROUND: Alcohol intake can alter gut microbiome, which may subsequently affect human health. However, limited population-based, prospective studies have investigated associations of habitual and recent alcohol intake with the gut microbiome, particularly among Black/African American individuals.<br><br>OBJECTIVE: We examined the association of alcohol intake with gut microbiome in a predominantly low-income Black/African American population.<br><br>METHODS: We investigated the dose- and type-specific associations of habitual and recent alcohol intake with the gut microbiome among 538 Black/African American adults (150 males and 388 females). Habitual and recent alcohol intakes were assessed at cohort baseline (2002-2009) and stool collection (2018-2021), respectively. Gut microbiome was profiled using shotgun metagenomic sequencing. Generalized linear models were employed to evaluate the associations between alcohol intakes and gut microbiome composition, with adjustments for sociodemographic characteristics, other lifestyle factors, and comorbidities. False discovery rate (FDR) <0.1 was considered statistically significant.<br><br>RESULTS: The mean age at enrollment was 53.2 &#xb1; 7.7 y, with a mean interval of 13.8 y (range: 9.0-18.1 y) between baseline and stool sample collection. Recent alcohol intake was not significantly associated with microbial taxa abundance. However, habitual alcohol intake, both total amount and types of alcoholic beverages, showed significant associations with several microbial taxa abundance, primarily in males, including species within classes Clostridia, Bacilli, and Mahellia within Firmicutes. Specifically, total alcohol, beer, and red wine intakes were all inversely associated with genus MGYG-HGUT-02719 within class Clostridia (&#x3b2; = -2.26 to -0.09 per 1 drink/d increase). Red wine consumption was also inversely associated with the abundance of genera CAG-110, Oscillibacter, and Gemmiger within class Clostridia (&#x3b2; = -3.88 to -2.69), whereas positively associated with genus Absiella (&#x3b2; = 1.81) within class Bacilli. Most of these associations remained significant after additionally adjusting for BMI and baseline comorbidities.<br><br>CONCLUSIONS: We identified gut microbial taxa associated with habitual alcohol intake among Black/African American males, although the magnitudes of these associations were generally small. Further research is needed to determine if these bacteria modify alcohol-disease relationships.}, }
@article {pmid39536991, year = {2025}, author = {Li, Z and Gao, W and Yuan, H and Pan, X and Yuan, R and Wang, W and Guan, L and Hu, L and Chen, Y and Cheng, Z and He, R and Zhang, L and Yang, B and Zhu, Q and Liang, M and Seki, E and Lin, R and Chu, H and Yang, L}, title = {Suppression of intestinal Ticam1 ameliorated MASH via Akkermansia muciniphila QAA37749.1 mediated betaine transformation.}, journal = {Biochimica et biophysica acta. Molecular basis of disease}, volume = {1871}, number = {1}, pages = {167571}, doi = {10.1016/j.bbadis.2024.167571}, pmid = {39536991}, issn = {1879-260X}, mesh = {Animals ; Mice ; *Akkermansia ; *Gastrointestinal Microbiome ; *Mice, Knockout ; Intestinal Mucosa/metabolism/microbiology/immunology/pathology ; Diet, High-Fat/adverse effects ; Male ; Fatty Liver/metabolism/pathology ; Mice, Inbred C57BL ; }, abstract = {BACKGROUND &amp; AIMS: Gut inflammation caused by diets could damage the intestinal barrier, which increases the liver exposition to pathogenic substances. Toll-IL-1 receptor (TIR) domain-containing adaptor molecule-1 (Ticam1) is a key molecule in the Toll-like receptors (TLRs) pathway, which is important for the immune defense against pathogens such as bacteria or viruses. In this study, mouse intestinal epithelial cell (IEC) Ticam1 was knocked out to suppress the intestinal inflammation response in metabolic dysfunction-associated steatohepatitis (MASH) to investigate its influence on the development of MASH.<br><br>METHODS: The IEC-specific Ticam1 knockout (Ticam1[&#x394;IEC]) mice and the control (Ticam1[fl/fl]) mice were fed with high-fat high-fructose diet (HFD) for 22&#xa0;weeks to evaluate the gut alteration and the MASH-associated disorders. The intestinal secreted immunoglobulin A (sIgA) and IgA-secreting immune cells were detected. Shotgun metagenomic sequencing was used to find the gut microbiome shift in different groups. Liquid chromatography mass spectrometry was also performed to evaluate the change of serum metabolites caused by the gut microbiome alteration.<br><br>RESULTS: The gut inflammation and gut barrier dysfunction were both alleviated in HFD-fed Ticam1[&#x394;IEC] mice, which had improved MASH disorders compared with Ticam1[fl/fl]. Additionally, HFD-fed Ticam1[&#x394;IEC] mice had increased sIgA and intestinal IgA-secreting immune cells. It showed a significantly higher content of Akkermansia muciniphila. We proved that Akkermansia muciniphila encoded a protein named QAA37749.1 that could promote the conversion of choline to betaine, through which the development of MASH was inhibited in HFD-Ticam1[&#x394;IEC] mice.<br><br>CONCLUSION: Deletion of IEC Ticam1 alleviated MASH disorder and gut dysfunction in mice. It enhanced the level of intestinal sIgA and the growth of Akkermansia muciniphila, which supported the betaine transformation by QAA37749.1. Suppressing IEC Ticam1 might be a promising strategy for MASH disorder.}, }
@article {pmid39536943, year = {2024}, author = {Fadell, F and Saliba, R and El-Solh, AA}, title = {Bacteriology of Aspiration Pneumonia: The Lung Microbiome and the Changing Microbial Etiology.}, journal = {Seminars in respiratory and critical care medicine}, volume = {45}, number = {6}, pages = {626-633}, doi = {10.1055/s-0044-1792111}, pmid = {39536943}, issn = {1098-9048}, mesh = {Humans ; *Pneumonia, Aspiration/microbiology ; *Microbiota ; Lung/microbiology ; Dysbiosis/microbiology ; }, abstract = {Aspiration pneumonia refers to the process of alveolar inflammation induced by the inhalation of oropharyngeal secretions into the lower respiratory tract. Predisposing factors comprise swallowing dysfunction, impaired cough reflex, and degenerative neurological diseases. Accumulating evidence projects a fading contribution of anaerobic bacteria in aspiration pneumonia at the expense of Gram-negative bacilli, with Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa, becoming the predominant organisms recovered from respiratory specimens. Aspiration of oropharyngeal secretions colonized with respiratory pathogens induces a profound disequilibrium of the lung microbiota resulting in a state of dysbiosis. Understanding this complex temporal variability between microbiome-host associations was only made possible with the introduction of metagenomic sequencing. In this narrative review, we summarize existing knowledge and elaborate on the evolving microbiology of aspiration pneumonia including the link between oral microbiome and pulmonary aspiration. We also highlight the progress and challenges in instituting microbiome-targeted strategies for preventing and treating the sequelae of aspiration pneumonia.}, }
@article {pmid39536756, year = {2025}, author = {Poulsen, CE and Vinding, R and Rasmussen, MA and Shah, S and Trivedi, U and Rodriguez, CL and Widdowson, ML and Jiang, J and Poulsen, CS and Eliasen, A and Chawes, B and Bønnelykke, K and Hansen, CHF and Sørensen, SJ and Thorsen, J and Stokholm, J}, title = {No association between the early-life gut microbiota and childhood body mass index and body composition.}, journal = {Med (New York, N.Y.)}, volume = {6}, number = {4}, pages = {100538}, doi = {10.1016/j.medj.2024.10.015}, pmid = {39536756}, issn = {2666-6340}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Body Mass Index ; Female ; *Body Composition ; Male ; Child, Preschool ; Infant ; Child ; *Pediatric Obesity/microbiology/epidemiology ; Prospective Studies ; Feces/microbiology ; Infant, Newborn ; Denmark/epidemiology ; RNA, Ribosomal, 16S ; Adiposity ; Overweight/epidemiology ; }, abstract = {BACKGROUND: The gut microbiota has been implicated in adult obesity, but the causality is still unclear. It has been hypothesized that an obesity-prone gut microbiota can be established in infancy, but only few studies have examined the early-life gut microbiota in relation to obesity in childhood, and no consistent associations have been reported. Here, we examine the association between the early-life gut microbiota and body mass index (BMI) development and body composition throughout childhood.<br><br>METHODS: Gut microbiota from stool were collected from 700 children in the Copenhagen Prospective Studies on Asthma in Childhood2010 (COPSAC2010) cohort at ages of 1&#xa0;week, 1month, 1 year, 4 years, and 6 years and analyzed by 16S rRNA gene sequencing. Outcomes included BMI World Health Organization (WHO) Z scores (zBMI), overweight (zBMI&#xa0;>&#xa0;1.04) and obesity (zBMI&#xa0;>&#xa0;1.64) (0-10 years), and adiposity rebound and body composition from dual-energy X-ray absorptiometry at 6 years.<br><br>FINDINGS: The early-life gut microbiota diversity, overall composition, and individual taxon abundances in unsupervised and supervised models were not consistently associated with either current or later BMI Z scores, overweight, obesity, adiposity rebound, or body composition in childhood.<br><br>CONCLUSIONS: In a deeply characterized longitudinal birth cohort, we did not observe any consistent associations between the early-life gut microbiota and BMI or risk of obesity in later childhood. While this does not conclusively rule out a relationship, it suggests that if such associations exist, they may be more complex and potentially influenced by factors emerging later in life, including lifestyle changes.<br><br>FUNDING: COPSAC is funded by private and public research funds (all listed on www.copsac.com).}, }
@article {pmid39536492, year = {2025}, author = {Chu, J and Ye, Y and Wu, YH}, title = {A glimpse of microbial potential in metal metabolism in the Clarion-Clipperton Fracture Zone in the eastern Pacific Ocean based on metagenomic analysis.}, journal = {Marine genomics}, volume = {79}, number = {}, pages = {101159}, doi = {10.1016/j.margen.2024.101159}, pmid = {39536492}, issn = {1876-7478}, mesh = {Pacific Ocean ; Metagenomics ; *Metagenome ; *Archaea/metabolism/genetics ; *Bacteria/metabolism/genetics/classification ; *Metals/metabolism ; *Geologic Sediments/microbiology ; *Microbiota ; }, abstract = {The polymetallic nodules distributed in the abyssal ocean floor are full of economic value, rich in manganese, iron, copper and rare-earth elements. Little is currently known about the diversity and the metabolic potential of microorganisms inhabiting the Clarion-Clipperton Fracture Zone (CCFZ) in eastern Pacific Ocean. In this study, the surface sediments (0-8 cm), which were divided into eight parts at 1 cm intervals were collected from the CCFZ. The microbial diversity and the metabolic potential of metal were examined by metagenomic sequencing and binning. The metal redox genes and metal transporter genes also showed a certain trend at different depths, the highest in the surface layer, about the same at 0-6 cm, and greater changes after >6 cm. 58 high- and medium metagenome-assembled genomes (MAGs) were recovered and assigned to 14 bacterial phyla and 1 archaeal phylum after dereplication. Alphaproteobacteria mainly carried out the oxidation of Fe/Mn and the reduction of Hg, Gammaproteobacteria mainly for the oxidation of Mn/Cu and the reduction of Cr/Hg and Methylomirabilota mainly for the oxidation of Mn and the reduction of As/Cr/Hg. Among the five Thermoproteota MAGs identified, only one had genes annotated for Mn oxidation, suggesting a limited but potentially significant role in this process at the bottom layer. By identifying the microbial diversity and the metabolic potential of metal in different depth, our study strengthens the understanding of metal metabolism in CCFZ and provides the foundation for further analyses of metal metabolism in such ecosystems.}, }
@article {pmid39533168, year = {2024}, author = {Zhang, Z and Wang, K and Zou, C and Zhao, T and Wu, W and Wang, C and Hua, Y}, title = {Comparison of microbial diversity and carbohydrate-active enzymes in the hindgut of two wood-feeding termites, Globitermes sulphureus (Blattaria: Termitidae) and Coptotermes formosanus (Blattaria: Rhinotermitidae).}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {470}, pmid = {39533168}, issn = {1471-2180}, support = {2024A1515012617//Guangdong Natural Science Foundation-General Program/ ; }, mesh = {Animals ; *Isoptera/microbiology ; *Gastrointestinal Microbiome ; *RNA, Ribosomal, 16S/genetics ; *Wood/microbiology ; *Bacteria/classification/genetics/enzymology/isolation &amp; purification ; Phylogeny ; Glycoside Hydrolases/genetics/metabolism ; Lignin/metabolism ; Biodiversity ; }, abstract = {BACKGROUND: Wood-feeding termites have been employed as sources of novel and highly efficient lignocellulolytic enzymes due to their ability to degrade lignocellulose efficiently. As a higher wood-feeding termite, Globitermes sulphureus (Blattaria: Termitidae) plays a crucial role as a decomposer in regions such as Vietnam, Singapore, Myanmar, and Yunnan, China. However, the diversity of its gut microbiome and carbohydrate-active enzymes (CAZymes) remains unexplored. Here, we analyzed the diversity of hindgut microbial communities and CAZymes in a higher wood-feeding termite, G. sulphureus, and a lower wood-feeding termite, Coptotermes formosanus (Blattaria: Rhinotermitidae).<br><br>RESULTS: 16S rRNA sequencing revealed that Spirochaetota, Firmicutes, and Fibrobacterota were the dominant microbiota in the hindgut of the two termite species. At the phylum level, the relative abundances of Proteobacteria and Bacteroidota were significantly greater in the hindgut of C. formosanus than in G. sulphureus. At the genus level, the relative abundances of Candidatus_Azobacteroides and Escherichia-Shigella were significantly lower in the hindgut of G. sulphureus than in C. formosanus. Metagenomic analysis revealed that glycoside hydrolases (GHs) with cellulases and hemicellulases functions were not significantly different between G. sulphureus and C. formosanus. Interestingly, the cellulases in G. sulphureus were mainly GH5_2, GH5_4, GH6, GH9, and GH45, while the hemicellulases were mainly GH11, GH8, GH10, GH11, GH26, and GH53. In C. formosanus, the cellulases were mainly GH6 and GH9, and the hemicellulases were mainly GH5_7, GH5_21, GH10, GH12, and GH53. In addition, &#x3b2;-glucosidase, exo-&#x3b2;-1,4-glucanase, and endo-&#x3b2;-1,4-glucanase activities did not differ significantly between the two termite species, while xylanase activity was higher in G. sulphureus than in C. formosanus. The bacteria encoding GHs in G. sulphureus were mainly Firmicutes, Fibrobacterota, and Proteobacteria, whereas Bacteroidota and Spirochaetota were the main bacteria encoding GHs in C. formosanus.<br><br>CONCLUSIONS: Our findings characterized the microbial composition and differences in the hindgut microbiota of G. sulphureus and C. formosanus. Compared to C. formosanus, G. sulphureus is enriched in genes encoding for hemicellulase and debranching enzymes. It also highlights the rich diversity of GHs in the hindgut microbiota of G. sulphureus, including the GH5 subfamily, GH6, and GH48, with the GH6 and GH48 not previously reported in other higher termites. These results strengthen the understanding of the diversity of termite gut microbiota and CAZymes.}, }
@article {pmid39529146, year = {2024}, author = {Zhang, C and Liu, H and Jiang, X and Zhang, Z and Hou, X and Wang, Y and Wang, D and Li, Z and Cao, Y and Wu, S and Huws, SA and Yao, J}, title = {An integrated microbiome- and metabolome-genome-wide association study reveals the role of heritable ruminal microbial carbohydrate metabolism in lactation performance in Holstein dairy cows.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {232}, pmid = {39529146}, issn = {2049-2618}, mesh = {Animals ; Cattle ; *Rumen/microbiology/metabolism ; *Lactation ; Female ; *Genome-Wide Association Study ; *Polymorphism, Single Nucleotide ; *Carbohydrate Metabolism/genetics ; *Fatty Acids, Volatile/metabolism ; *Metabolome ; Gastrointestinal Microbiome/genetics ; Milk/microbiology/metabolism ; Microbiota/genetics ; Bacteria/classification/genetics/metabolism ; }, abstract = {BACKGROUND: Despite the growing number of studies investigating the connection between host genetics and the rumen microbiota, there remains a dearth of systematic research exploring the composition, function, and metabolic traits of highly heritable rumen microbiota influenced by host genetics. Furthermore, the impact of these highly heritable subsets on lactation performance in cows remains unknown. To address this gap, we collected and analyzed whole-genome resequencing data, rumen metagenomes, rumen metabolomes and short-chain fatty acids (SCFAs) content, and lactation performance phenotypes from a cohort of 304 dairy cows.<br><br>RESULTS: The results indicated that the proportions of highly heritable subsets (h[2]&#x2009;&#x2265;&#x2009;0.2) of the rumen microbial composition (55%), function (39% KEGG and 28% CAZy), and metabolites (18%) decreased sequentially. Moreover, the highly heritable microbes can increase energy-corrected milk (ECM) production by reducing the rumen acetate/propionate ratio, according to the structural equation model (SEM) analysis (CFI&#x2009;=&#x2009;0.898). Furthermore, the highly heritable enzymes involved in the SCFA synthesis metabolic pathway can promote the synthesis of propionate and inhibit the acetate synthesis. Next, the same significant SNP variants were used to integrate information from genome-wide association studies (GWASs), microbiome-GWASs, metabolome-GWASs, and microbiome-wide association studies (mWASs). The identified single nucleotide polymorphisms (SNPs) of rs43470227 and rs43472732 on SLC30A9 (Zn[2+] transport) (P&#x2009;<&#x2009;0.05/nSNPs) can affect the abundance of rumen microbes such as Prevotella_sp., Prevotella_sp._E15-22, Prevotella_sp._E13-27, which have the oligosaccharide-degradation enzymes genes, including the GH10, GH13, GH43, GH95, and GH115 families. The identified SNPs of chr25:11,177 on 5s_rRNA (small ribosomal RNA) (P&#x2009;<&#x2009;0.05/nSNPs) were linked to ECM, the abundance alteration of Pseudobutyrivibrio_sp. (a genus that was also showed to be linked to the ECM production via the mWASs analysis), GH24 (lysozyme), and 9,10,13-TriHOME (linoleic acid metabolism). Moreover, ECM, and the abundances of Pseudobutyrivibrio sp., GH24, and 9,10,13-TRIHOME were significantly greater in the GG genotype than in the AG genotype at chr25:11,177 (P&#x2009;<&#x2009;0.05). By further the SEM analysis, GH24 was positively correlated with Pseudobutyrivibrio sp., which was positively correlated with 9,10,13-triHOME and subsequently positively correlated with ECM (CFI&#x2009;=&#x2009;0.942).<br><br>CONCLUSION: Our comprehensive study revealed the distinct heritability patterns of rumen microbial composition, function, and metabolism. Additionally, we shed light on the influence of host SNP variants on the rumen microbes with carbohydrate metabolism and their subsequent effects on lactation performance. Collectively, these findings offer compelling evidence for the host-microbe interactions, wherein cows actively modulate their rumen microbiota through SNP variants to regulate their own lactation performance. Video Abstract.}, }
@article {pmid39524440, year = {2024}, author = {Ozaka, S and Sonoda, A and Kudo, Y and Ito, K and Kamiyama, N and Sachi, N and Chalalai, T and Kagoshima, Y and Soga, Y and Ekronarongchai, S and Ariki, S and Mizukami, K and Ishizawa, S and Nishiyama, M and Murakami, K and Takeda, K and Kobayashi, T}, title = {Daikenchuto, a Japanese herbal medicine, ameliorates experimental colitis in a murine model by inducing secretory leukocyte protease inhibitor and modulating the gut microbiota.}, journal = {Frontiers in immunology}, volume = {15}, number = {}, pages = {1457562}, pmid = {39524440}, issn = {1664-3224}, mesh = {Animals ; Humans ; Male ; Mice ; Anti-Inflammatory Agents/pharmacology ; *Colitis/chemically induced/drug therapy/microbiology ; Colon/drug effects/immunology/microbiology ; Cytokines/metabolism ; Dextran Sulfate ; Disease Models, Animal ; *Gastrointestinal Microbiome/drug effects ; Intestinal Mucosa/drug effects/immunology/microbiology ; Mice, Inbred C57BL ; Mice, Knockout ; *Panax/chemistry ; *Plant Extracts/pharmacology ; *Secretory Leukocyte Peptidase Inhibitor/metabolism/genetics ; *Zanthoxylum/chemistry ; *Zingiberaceae/chemistry ; }, abstract = {BACKGROUND: Inflammatory bowel disease (IBD) is a refractory inflammatory disorder of the intestine, which is probably triggered by dysfunction of the intestinal epithelial barrier. Secretory leukocyte protease inhibitor (SLPI) secreted by colon epithelial cells protects against intestinal inflammation by exerting anti-protease and anti-microbial activities. Daikenchuto (DKT) is one of the most commonly prescribed Japanese traditional herbal medicines for various digestive diseases. Although several animal studies have revealed that DKT exerts anti-inflammatory effects, its detailed molecular mechanism is unclear. This study aimed to clarify the anti-inflammatory mechanism of DKT using a murine colitis model, and to evaluate its potential as a therapeutic agent for IBD.<br><br>METHODS: Experimental colitis was induced in wild-type (WT) mice and SLPI-deficient (KO) mice by dextran sulfate sodium (DSS) after oral administration of DKT. The resultant clinical symptoms, histological changes, and pro-inflammatory cytokine levels in the colon were assessed. Expression of SLPI in the colon was detected by Western blotting and immunohistochemistry. Composition of the gut microbiota was analyzed by 16S rRNA metagenome sequencing and intestinal metabolites were measured by gas chromatography-mass spectrometry analysis. Intestinal epithelial barrier function was assessed by oral administration of FITC-dextran and immunostaining of tight junction proteins (TJPs).<br><br>RESULTS: Oral administration of DKT increased the number of butyrate-producing bacteria, such as Parabacteroides, Allobaculum, and Akkermansia, enhanced the levels of short-chain fatty acids, including butyrate, in the colon, induced SLPI expression, and ameliorated DSS-induced colitis in WT mice. We found that mouse colon carcinoma cell line treatment with either DKT or butyrate significantly enhanced the expression of SLPI. Moreover, supplementation of DKT protected the intestinal epithelial barrier with augmented expression of TJPs in WT mice, but not in KO mice. Finally, the composition of the gut microbiota was changed by DKT in WT mice, but not in KO mice, suggesting that DKT alters the colonic bacterial community in an SLPI-dependent manner.<br><br>CONCLUSION: These results indicate that DKT exerts anti-inflammatory effects on the intestinal epithelial barrier by SLPI induction, due, at least in part, to increased butyrate-producing bacteria and enhanced butyrate levels in the colon. These results provide insight into the mechanism of the therapeutic effects of DKT on IBD.}, }
@article {pmid39535126, year = {2024}, author = {Gao, P and Rinott, E and Dong, D and Mei, Z and Wang, F and Liu, Y and Kamer, O and Yaskolka Meir, A and Tuohy, KM and Blüher, M and Stumvoll, M and Stampfer, MJ and Shai, I and Wang, DD}, title = {Gut microbial metabolism of bile acids modifies the effect of Mediterranean diet interventions on cardiometabolic risk in a randomized controlled trial.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2426610}, pmid = {39535126}, issn = {1949-0984}, support = {K99 DK119412/DK/NIDDK NIH HHS/United States ; R01 NR019992/NR/NINR NIH HHS/United States ; P30 DK046200/DK/NIDDK NIH HHS/United States ; R01 AG077489/AG/NIA NIH HHS/United States ; RF1 AG083764/AG/NIA NIH HHS/United States ; R00 DK119412/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Diet, Mediterranean ; *Bile Acids and Salts/metabolism ; Male ; Female ; *Feces/microbiology/chemistry ; Middle Aged ; Adult ; Cardiometabolic Risk Factors ; Body Mass Index ; Bacteria/classification/metabolism/isolation &amp; purification/genetics ; Lipids/blood ; Cardiovascular Diseases/prevention &amp; control/metabolism ; Adiposity ; }, abstract = {Bile acids (BAs) undergo extensive microbial metabolism in the gut and exert hormone-like functions on physiological processes underlying metabolic risk. However, the extent to which gut BA profiles predict cardiometabolic risk and explain individual responses to dietary interventions in humans is still unclear. In the DIRECT-PLUS Trial, we conducted a multi-omics analysis of 284 participants randomized into three groups: healthy dietary guidelines and two Mediterranean diet (MedDiet) groups. We longitudinally measured 44 fecal BAs using liquid chromatography-mass spectrometry, the gut microbiome through shotgun metagenomic sequencing, and body adiposity and serum lipids at baseline, 6, and 18 months. Fecal levels of 14 BAs, such as lithocholic acid and ursodeoxycholic acid, were prospectively associated with body mass index (BMI) and serum lipid profiles (false discovery rate [q]<0.05). Baseline fecal BA levels significantly modified the beneficial effects of the MedDiet; for example, BMI reduction induced by MedDiet interventions was more pronounced in individuals with lower 12-dehydrocholic acid levels (q-interaction <0.001). We confirmed that the gut microbiome is a major modifier of the secondary BA pool in humans. Furthermore, the association of fecal BAs with body adiposity and serum lipids varied significantly in individuals with different abundances of gut microbes carrying BA metabolism enzymes, e.g. several Ruminococcus spp. In summary, our study identifies novel predictive biomarkers for cardiometabolic risk and offers new mechanistic insights to guide personalized dietary interventions.}, }
@article {pmid39532872, year = {2024}, author = {Wang, YF and Liu, YJ and Fu, YM and Xu, JY and Zhang, TL and Cui, HL and Qiao, M and Rillig, MC and Zhu, YG and Zhu, D}, title = {Microplastic diversity increases the abundance of antibiotic resistance genes in soil.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {9788}, pmid = {39532872}, issn = {2041-1723}, mesh = {*Soil Microbiology ; *Microplastics ; *Drug Resistance, Microbial/genetics ; Soil/chemistry ; Soil Pollutants ; Metagenomics ; Genes, Bacterial ; Virulence Factors/genetics ; Bacteria/genetics/drug effects/classification ; Interspersed Repetitive Sequences/genetics ; Genetic Variation ; Metagenome/genetics ; Anti-Bacterial Agents/pharmacology ; }, abstract = {The impact of microplastics on antibiotic resistance has attracted widespread attention. However, previous studies primarily focused on the effects of individual microplastics. In reality, diverse microplastic types accumulate in soil, and it remains less well studied whether microplastic diversity (i.e., variations in color, shape or polymer type) can be an important driver of increased antibiotic resistance gene (ARG) abundance. Here, we employed microcosm studies to investigate the effects of microplastic diversity on soil ARG dynamics through metagenomic analysis. Additionally, we evaluated the associated potential health risks by profiling virulence factor genes (VFGs) and mobile genetic elements (MGEs). Our findings reveal that as microplastic diversity increases, there is a corresponding rise in the abundance of soil ARGs, VFGs and MGEs. We further identified microbial adaptive strategies involving genes (changed genetic diversity), community (increased specific microbes), and functions (enriched metabolic pathways) that correlate with increased ARG abundance and may thus contribute to ARG dissemination. Additional global change factors, including fungicide application and plant diversity reduction, also contributed to elevated ARG abundance. Our findings suggest that, in addition to considering contamination levels, it is crucial to monitor microplastic diversity in ecosystems due to their potential role in driving the dissemination of antibiotic resistance through multiple pathways.}, }
@article {pmid39531444, year = {2024}, author = {Ghosh, S and Ghosh, AJ and Islam, R and Sarkar, S and Saha, T}, title = {Lactobacillus plantarum KAD protects against high-fat diet-induced hepatic complications in Swiss albino mice: Role of inflammation and gut integrity.}, journal = {PloS one}, volume = {19}, number = {11}, pages = {e0313548}, pmid = {39531444}, issn = {1932-6203}, mesh = {Animals ; *Lactobacillus plantarum ; Mice ; *Diet, High-Fat/adverse effects ; *Probiotics/pharmacology/administration &amp; dosage ; *Gastrointestinal Microbiome/drug effects ; *Liver/pathology/metabolism/drug effects ; *Inflammation ; Male ; Oxidative Stress/drug effects ; }, abstract = {Hepatic complications are the major health issues associated with dietary intake of calorie saturated food e.g. high-fat diet (HFD). Recent studies have revealed the beneficial effects of probiotics in HFD fed mice with hepatic complications. Some probiotic Lactic acid bacteria (LAB) e.g. Lactobacillus plantarum have drawn our attention in managing hepatic complications. Here, we aim to elucidate the protective effects of L. plantarum KAD strain, isolated from ethnic fermented food 'Kinema' in HFD-fed mice as, a preventive approach. Eighteen Swiss albino mice were equally divided into 3 groups: Normal Diet (ND), negative control (HFD), and HFD-fed with oral L. plantarum KAD supplementation (LP). All the experimental groups were subjected to specific diet according to grouping for eight weeks. After completion of the regime, subjects were anesthetized and sacrificed. Organs, blood, and fecal samples were collected and stored appropriately. Physical indices, including body weight gain, organ co-efficients were calculated along with assessment of glycemic, lipidomic, hepatic, oxidative stress, inflammatory, and histological parameters. Gut microbiota analysis was performed using 16s V3-V4 fecal metagenomic profiling, and sequencing were done using Illumina Miseq system. Oral administration of L. plantarum KAD is found to significantly (p<0.05) restore metabolic health by normalizing glycemic, lipidomic, hepatic parameters, oxidative stress and inflammatory parameters. Moreover, LP group (7.08±0.52 mg/g) showed significantly (p<0.001) decreased hepatic triglyceride level compared to HFD group (20.07±1.32 mg/g). L. plantarum KAD improved the adipocytic, and colonic histomorphology with significantly better scoring pattern. LP group (1.83±0.41) showed a significantly (p<0.001) reduced hepatic score compared to negative control group (5.00±0.63), showing reduced hepatosteatosis, and immune infiltration. The strain modulated gut health by altering its microbial composition positively towards normalization. In conclusion, the results of the experiment suggest that prophylactic L. plantarum KAD administration has beneficial effects on the onset of HFD induced hepatic complications in mice. Further studies are needed, on this strain for its clinical use as dietary supplement.}, }
@article {pmid39530358, year = {2024}, author = {Arandia-Gorostidi, N and Jaffe, AL and Parada, AE and Kapili, BJ and Casciotti, KL and Salcedo, RSR and Baumas, CMJ and Dekas, AE}, title = {Urea assimilation and oxidation support activity of phylogenetically diverse microbial communities of the dark ocean.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39530358}, issn = {1751-7370}, support = {507798//Simons Foundation Early Career Investigator Award AED/ ; 2143035//National Science Foundation CAREER Award to AED/ ; 1634297//NSF/ ; ECCS-2026822//National Science Foundation/ ; CEX2019-000928-S//Severo Ochoa Centre of Excellence/ ; 2020-BP-00179//Beatriu de Pin&#xf3;s Program/ ; //Stanford Science Fellows Program/ ; //National Science Foundation Postdoctoral Research Fellowship in Ocean Sciences/ ; }, mesh = {*Urea/metabolism ; *Oxidation-Reduction ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Pacific Ocean ; *Microbiota ; *Seawater/microbiology ; *Nitrification ; *Archaea/metabolism/genetics/classification ; *Metagenomics ; Phylogeny ; Metagenome ; Nitrogen/metabolism ; Ammonia/metabolism ; Urease/metabolism/genetics ; Ammonium Compounds/metabolism ; }, abstract = {Urea is hypothesized to be an important source of nitrogen and chemical energy to microorganisms in the deep sea; however, direct evidence for urea use below the epipelagic ocean is lacking. Here, we explore urea utilization from 50 to 4000 meters depth in the northeastern Pacific Ocean using metagenomics, nitrification rates, and single-cell stable-isotope-uptake measurements with nanoscale secondary ion mass spectrometry. We find that on average 25% of deep-sea cells assimilated urea-derived N (60% of detectably active cells), and that cell-specific nitrogen-incorporation rates from urea were higher than that from ammonium. Both urea concentrations and assimilation rates relative to ammonium generally increased below the euphotic zone. We detected ammonia- and urea-based nitrification at all depths at one of two sites analyzed, demonstrating their potential to support chemoautotrophy in the mesopelagic and bathypelagic regions. Using newly generated metagenomes we find that the ureC gene, encoding the catalytic subunit of urease, is found within 39% of deep-sea cells in this region, including the Nitrososphaeria (syn., Thaumarchaeota; likely for nitrification) as well as members of thirteen other phyla such as Proteobacteria, Verrucomicrobia, Plantomycetota, Nitrospinota, and Chloroflexota (likely for assimilation). Analysis of public metagenomes estimated ureC within 10-46% of deep-sea cells around the world, with higher prevalence below the photic zone, suggesting urea is widely available to the deep-sea microbiome globally. Our results demonstrate that urea is a nitrogen source to abundant and diverse microorganisms in the dark ocean, as well as a significant contributor to deep-sea nitrification and therefore fuel for chemoautotrophy.}, }
@article {pmid39530242, year = {2025}, author = {Liu, F and Cai, B and Lian, S and Chang, X and Chen, D and Pu, Z and Bao, L and Wang, J and Lv, J and Zheng, H and Bao, Z and Zhang, L and Wang, S and Li, Y}, title = {MolluscDB 2.0: a comprehensive functional and evolutionary genomics database for over 1400 molluscan species.}, journal = {Nucleic acids research}, volume = {53}, number = {D1}, pages = {D1075-D1086}, pmid = {39530242}, issn = {1362-4962}, support = {2022YFD2400301//National Key R&amp;D Program of China/ ; 32222085//National Natural Science Foundation of China/ ; 842341005//Fundamental Research Funds for the Central Universities/ ; 32130107//National Natural Science Foundation of China/ ; LSKJ202202804//Science &amp; Technology Innovation Project of Laoshan Laboratory/ ; 2021ZLGX03//Key Research and Development Program of Shandong Province/ ; GML20220018//Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)/ ; //Taishan Scholar Project of Shandong Province/ ; }, mesh = {Animals ; *Mollusca/genetics/classification ; *Genomics/methods ; *Databases, Genetic ; Transcriptome ; Evolution, Molecular ; Genome/genetics ; Proteome/genetics ; Software ; Molecular Sequence Annotation ; }, abstract = {Mollusca represents the second-largest animal phylum but remains less explored genomically. The increase in high-quality genomes and diverse functional genomic data holds great promise for advancing our understanding of molluscan biology and evolution. To address the opportunities and challenges facing the molluscan research community in managing vast multi-omics resources, we developed MolluscDB 2.0 (http://mgbase.qnlm.ac), which integrates extensive functional genomic data and offers user-friendly tools for multilevel integrative and comparative analyses. MolluscDB 2.0 covers 1450 species across all eight molluscan classes and compiles ∼4200 datasets, making it the most comprehensive multi-omics resource for molluscs to date. MolluscDB 2.0 expands the layers of multi-omics data, including genomes, bulk transcriptomes, single-cell transcriptomes, proteomes, epigenomes and metagenomes. MolluscDB 2.0 also more than doubles the number of functional modules and analytical tools, updating 14 original modules and introducing 20 new, specialized modules. Overall, MolluscDB 2.0 provides highly valuable, open-access multi-omics platform for the molluscan research community, expediting scientific discoveries and deepening our understanding of molluscan biology and evolution.}, }
@article {pmid39529629, year = {2024}, author = {Smith, GJ and van Alen, TA and van Kessel, MAHJ and Lücker, S}, title = {Simple, reference-independent assessment to empirically guide correction and polishing of hybrid microbial community metagenomic assembly.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18132}, pmid = {39529629}, issn = {2167-8359}, mesh = {*Metagenomics/methods ; *Microbiota/genetics ; Metagenome/genetics ; High-Throughput Nucleotide Sequencing/methods ; Bioreactors/microbiology ; Sequence Analysis, DNA/methods ; Software ; }, abstract = {Hybrid metagenomic assembly of microbial communities, leveraging both long- and short-read sequencing technologies, is becoming an increasingly accessible approach, yet its widespread application faces several challenges. High-quality references may not be available for assembly accuracy comparisons common for benchmarking, and certain aspects of hybrid assembly may benefit from dataset-dependent, empiric guidance rather than the application of a uniform approach. In this study, several simple, reference-free characteristics-particularly coding gene content and read recruitment profiles-were hypothesized to be reliable indicators of assembly quality improvement during iterative error-fixing processes. These characteristics were compared to reference-dependent genome- and gene-centric analyses common for microbial community metagenomic studies. Two laboratory-scale bioreactors were sequenced with short- and long-read platforms, and assembled with commonly used software packages. Following long read assembly, long read correction and short read polishing were iterated up to ten times to resolve errors. These iterative processes were shown to have a substantial effect on gene- and genome-centric community compositions. Simple, reference-free assembly characteristics, specifically changes in gene fragmentation and short read recruitment, were robustly correlated with advanced analyses common in published comparative studies, and therefore are suitable proxies for hybrid metagenome assembly quality to simplify the identification of the optimal number of correction and polishing iterations. As hybrid metagenomic sequencing approaches will likely remain relevant due to the low added cost of short-read sequencing for differential coverage binning or the ability to access lower abundance community members, it is imperative that users are equipped to estimate assembly quality prior to downstream analyses.}, }
@article {pmid39529240, year = {2024}, author = {Liu, S and Zhang, Z and Wang, X and Ma, Y and Ruan, H and Wu, X and Li, B and Mou, X and Chen, T and Lu, Z and Zhao, W}, title = {Biosynthetic potential of the gut microbiome in longevous populations.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2426623}, pmid = {39529240}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome ; Humans ; *Feces/microbiology ; Aged ; *Metagenomics ; Multigene Family ; Aged, 80 and over ; Terpenes/metabolism ; Longevity ; Akkermansia/metabolism ; Adult ; Male ; Female ; Middle Aged ; Cohort Studies ; Biological Products/metabolism ; Metagenome ; Young Adult ; }, abstract = {Gut microbiome plays a pivotal role in combating diseases and facilitating healthy aging, and natural products derived from biosynthetic gene clusters (BGCs) of the human microbiome exhibit significant biological activities. However, the natural products of the gut microbiome in long-lived populations remain poorly understood. Here, we integrated six cohorts of long-lived populations, encompassing a total of 1029 fecal metagenomic samples, and employed the metagenomic single sample assembled BGCs (MSSA-BGCs) analysis pipeline to investigate the natural products and their associated species. Our findings reveal that the BGC composition of the extremely long-lived group differed significantly from that of younger elderly and young individuals across five cohorts. Terpene and Type I PKS BGCs were enriched in the extremely long-lived, whereas cyclic-lactone-autoinducer BGCs were more prevalent in the young. Association analysis indicated that terpene BGCs were strongly associated with the abundance of Akkermansia muciniphila, which was also more abundant in the long-lived elderly across at least three cohorts. We assembled 18 A. muciniphila draft genomes using metagenomic data from the extremely long-lived group across six cohorts and discovered that they all harbor two classes of terpene BGCs, which aligns with the 97 complete genomes of A. muciniphila strains retrieved from the NCBI database. The core domains of these two BGC classes are squalene/phytoene synthases involved in the biosynthesis of tri- and tetraterpenes. Furthermore, the abundance of fecal A. muciniphila was significantly associated with eight types of triterpenoids. Targeted terpenoid metabolomic analysis revealed that two triterpenoids, Holstinone C and colubrinic acid, were enriched in the A. muciniphila culture solution compared to the medium, thereby confirming the production of triterpenoids by A. muciniphila. The natural products derived from the gut of long-lived populations provide intriguing indications of their potential beneficial roles in regulating health.}, }
@article {pmid39529113, year = {2024}, author = {Guo, M and He, S and Song, W and Mai, J and Yuan, X and Huang, Y and Xi, H and Sun, G and Chen, Y and Du, B and Liu, X}, title = {The Lachnospiraceae-butyric acid axis and its role in glucocorticoid-associated osteonecrosis.}, journal = {Journal of translational medicine}, volume = {22}, number = {1}, pages = {1015}, pmid = {39529113}, issn = {1479-5876}, support = {82074471//National Natural Science Foundation of China/ ; 81804117//National Natural Science Foundation of China/ ; MS202220//Jiangsu Administration of Traditional Chinese Medicine/ ; JSDW202252//Jiangsu Provincial Medical Key Discipline(Laboratory)Cultivation Unit/ ; }, mesh = {Humans ; *Glucocorticoids/adverse effects ; *Osteonecrosis/chemically induced/pathology ; *Gastrointestinal Microbiome/drug effects ; *Butyric Acid ; Male ; Female ; Middle Aged ; Inflammation ; }, abstract = {Glucocorticoids (GCs) are key inducers of osteonecrosis, yet not all patients treated with GCs develop glucocorticoid-associated osteonecrosis (GAON). The factors mediating this relationship are unclear. Studies have shown that gut microbiota and their metabolites influence bone metabolism, but their role in GAON is unclear. This study aimed to explore the connection between GAON and gut microbiota. Through bidirectional Mendelian randomization analysis, we identified 14 gut microbial taxa, including Lachnospiraceae (IVW, P = 0.011), associated with GAON. RNA-seq analysis revealed that GAON differentially expressed genes (DEGs) were enriched for intestinal inflammatory response mechanisms. We then compared patients who developed GAON (17 cases), those who did not (GAnON, 15 cases), and those untreated with GCs (Blank, 15 cases) for gut microbiota composition, short-chain fatty acids (SCFAs), and serum inflammatory factors. Our findings indicated a decrease in Lachnospiraceae abundance (GAON 17.13%, GAnON 12.51%, Blank 24.52%) in GC-treated patients. Serum inflammatory factors (IL-17 A, IL-33, and TNF-α) associated with GAON (59.603 ± 12.147, 89.337 ± 20.714, 42.584 ± 9.185) showed significant differences between Blank (1.446 ± 0.683, 11.534 ± 4.705, 4.682 ± 1.48) and GAnON (25.353 ± 8.181, 32.527 ± 7.352, 12.49 ± 3.217) groups, with a negative correlation between these factors and Lachnospiraceae levels. Butyric acid levels in SCFAs varied among groups (P<0.01) and correlated with Lachnospiraceae and inflammatory factors. Controlled experiments in GAON rats demonstrated butyric acid's osteoprotective role in GAON development (P<0.01). In conclusion, our study suggests that reduced Lachnospiraceae and butyric acid levels, along with increased inflammation due to GCs use, contribute to GAON. Butyric acid may mediate the effects of Lachnospiraceae and inflammation. Butyrate supplementation could potentially reduce GAON incidence, offering a novel approach for its clinical management.}, }
@article {pmid39528484, year = {2024}, author = {Manghi, P and Filosi, M and Zolfo, M and Casten, LG and Garcia-Valiente, A and Mattevi, S and Heidrich, V and Golzato, D and Perini, S and Thomas, AM and Montalbano, S and Cancellieri, S and Waldron, L and Hall, JB and Xu, S and Volfovsky, N and Green Snyder, L and Feliciano, P and Asnicar, F and Valles-Colomer, M and Michaelson, JJ and Segata, N and Domenici, E}, title = {Large-scale metagenomic analysis of oral microbiomes reveals markers for autism spectrum disorders.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {9743}, pmid = {39528484}, issn = {2041-1723}, support = {MASTER-818368//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; ONCOBIOME-825410//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; 1U01CA230551//U.S. Department of Health &amp; Human Services | NIH | National Cancer Institute (NCI)/ ; }, mesh = {Humans ; *Autism Spectrum Disorder/microbiology ; Male ; Child ; Female ; *Mouth/microbiology ; *Metagenomics/methods ; *Microbiota/genetics ; *Saliva/microbiology ; Cross-Sectional Studies ; *Biomarkers ; Siblings ; Metagenome ; Child, Preschool ; Adolescent ; }, abstract = {The link between the oral microbiome and neurodevelopmental disorders remains a compelling hypothesis, still requiring confirmation in large-scale datasets. Leveraging over 7000 whole-genome sequenced salivary samples from 2025 US families with children diagnosed with autism spectrum disorders (ASD), our cross-sectional study shows that the oral microbiome composition can discriminate ASD subjects from neurotypical siblings (NTs, AUC = 0.66), with 108 differentiating species (q < 0.005). The relative abundance of these species is highly correlated with cognitive impairment as measured by Full-Scale Intelligence Quotient (IQ). ASD children with IQ < 70 also exhibit lower microbiome strain sharing with parents (p < 10[-6]) with respect to NTs. A two-pronged functional enrichment analysis suggests the contribution of enzymes from the serotonin, GABA, and dopamine degradation pathways to the distinct microbial community compositions observed between ASD and NT samples. Although measures of restrictive eating diet and proxies of oral hygiene show relatively minor effects on the microbiome composition, the observed associations with ASD and IQ may still represent unaccounted-for underlying differences in lifestyle among groups. While causal relationships could not be established, our study provides substantial support to the investigation of oral microbiome biomarkers in ASD.}, }
@article {pmid39528483, year = {2024}, author = {Sánchez, O and Stefanni, S and Bhadury, P}, title = {The deep sea biodiversity and conservation collection.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {27559}, pmid = {39528483}, issn = {2045-2322}, abstract = {The deep sea, defined as ocean depths below 200 m, encompasses vast and largely unexplored habitats, such as abyssal plains, hydrothermal vents, cold seeps, and ocean trenches. This environment supports a remarkable diversity of life forms adapted to extreme conditions, including high pressure, low temperatures, and complete darkness. The Deep Sea Biodiversity and Conservation Collection highlights the importance of these ecosystems and the unique adaptations of the organisms inhabiting these extreme environments, ranging from invertebrates like corals and sponges to diverse microbial communities. The Collection includes studies on coral distribution and ecosystem services, trophic dynamics at cold-water coral reefs, and microbial diversity using metabarcoding and metagenomics. Notable findings include insights into hydrothermal vent communities, the role of chemosynthesis in sustaining deep-sea life, and the adaptation of deep-sea invertebrates to varying depths. These studies underscore the critical need for conservation strategies for these fragile and understudied oceanic ecosystems to ensure their sustainability.}, }
@article {pmid39528106, year = {2025}, author = {Nyawo, G and Naidoo, CC and Wu, BG and Kwok, B and Clemente, JC and Li, Y and Minnies, S and Reeve, B and Moodley, S and John, TJ and Karamchand, S and Singh, S and Pecararo, A and Doubell, A and Kyriakakis, C and Warren, R and Segal, LN and Theron, G}, title = {Bad company? The pericardium microbiome in people investigated for tuberculous pericarditis in an HIV-prevalent setting.}, journal = {Microbes and infection}, volume = {27}, number = {3}, pages = {105434}, pmid = {39528106}, issn = {1769-714X}, support = {IK2 BX005309/BX/BLRD VA/United States ; K43 TW012302/TW/FIC NIH HHS/United States ; KL2 TR001446/TR/NCATS NIH HHS/United States ; R01 AI136894/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *HIV Infections/complications/microbiology/epidemiology/drug therapy ; Female ; Male ; Cross-Sectional Studies ; *Pericarditis, Tuberculous/microbiology ; *Pericardium/microbiology ; Middle Aged ; Adult ; *Microbiota ; C-Reactive Protein/analysis ; *Pericardial Fluid/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Prevalence ; Aged ; }, abstract = {BACKGROUND: The site-of-disease microbiome and predicted metagenome were evaluated in a cross-sectional study involving people with presumptive tuberculous pericarditis. We also explored the interaction between C-reactive protein (CRP) and the microbiome.<br><br>METHODS: People with effusions requiring diagnostic pericardiocentesis (n=139) provided pericardial fluid for sequencing and blood for CRP measurement.<br><br>RESULTS: Pericardial fluid microbiota differed in &#x3b2;-diversity among people with definite (dTB, n=91), probable (pTB, n=25), and non- (nTB, n=23) tuberculous pericarditis. dTBs were Mycobacterium-, Lacticigenium-, and Kocuria-enriched vs. nTBs. HIV-positive dTBs were Mycobacterium-, Bifidobacterium-, Methylobacterium-, and Leptothrix-enriched vs. HIV-negative dTBs. HIV-positive dTBs on ART were Mycobacterium- and Bifidobacterium-depleted vs. those not on ART. dTBs exhibited enrichment in short-chain fatty acid (SCFA) and mycobacterial metabolism pathways vs. nTBs. Additional non-pericardial involvement (pulmonary infiltrates) was associated with Mycobacterium-enrichment and Streptococcus-depletion. Mycobacterium reads were in 34&#xa0;% (31/91) of dTBs, 8&#xa0;% (2/25) of pTBs and 17&#xa0;% (4/23) nTBs. People with CRP above (vs. below) the median value had different &#x3b2;-diversity (Pseudomonas-depleted). No correlation was found between enriched taxa in dTBs and CRP.<br><br>CONCLUSIONS: Pericardial fluid microbial composition varies by tuberculosis status, HIV (and ART) status and dTBs are enriched in SCFA-associated taxa. The clinical significance, including mycobacterial reads in nTBs and pTBs, requires evaluation.}, }
@article {pmid39528052, year = {2025}, author = {Jiang, Q and Zhu, X and Sun, L and Xie, C and Wang, X and Ma, L and Yan, X}, title = {Akkermansia muciniphila Promotes SIgA Production and Alters the Reactivity Toward Commensal Bacteria in Early-Weaned Piglets.}, journal = {The Journal of nutrition}, volume = {155}, number = {1}, pages = {52-65}, doi = {10.1016/j.tjnut.2024.11.002}, pmid = {39528052}, issn = {1541-6100}, mesh = {Animals ; *Immunoglobulin A, Secretory/metabolism/biosynthesis ; Swine ; Weaning ; *Gastrointestinal Microbiome ; Male ; Mice ; *Verrucomicrobia/physiology ; Feces/microbiology ; Mice, Inbred C57BL ; Akkermansia ; }, abstract = {BACKGROUND: Secretory IgA (SIgA) is the first line of defense in protecting the intestinal epithelium against pathogenic bacteria, regulating gut microbiota composition, and maintaining intestinal homeostasis. Early weaning strategies may disrupt SIgA levels in piglet intestines, causing a decline in immune response and early weaning stress. However, the specific microbial mechanisms modulating SIgA in early-weaned piglets are not well understood.<br><br>OBJECTIVES: We hypothesized that Akkermansia muciniphila increases intestinal SIgA production in the early-weaned piglets.<br><br>METHODS: Fecal SIgA levels, SIgA-coated bacteria abundance, and fecal metagenomes were compared between 6 Huanjiang miniature (HM) and 6 Duroc&#xd7;Landrace&#xd7;Yorkshire (DLY) early-weaned piglets to identify bacterial species involved in SIgA modulation. Four bacterial species were investigated using 5 groups (Control, A.&#xa0;muciniphila, L. amylovorus, L. crispatus, and L.&#xa0;acidophilus) of male specific pathogen-free C57BL/6J mice, weaned 3 wk postbirth (n = 8/group). Subsequently, 10-d-old Landrace&#xd7;Yorkshire (LY) piglets were randomly assigned to 3 groups (Control, 10[9]A.&#xa0;muciniphila, and 10[8]A.&#xa0;muciniphila) (n = 10/group) to evaluate the effect of orally administered A.&#xa0;muciniphila on intestinal SIgA production and microbial composition.<br><br>RESULTS: HM early-weaned piglets showed significantly higher SIgA levels [7.59 &#x3bc;g/mg, 95% confidence interval (CI): 3.2, 12, P = 0.002] and SIgA-coated bacteria abundance (8.64%, 95% CI: 3.2, 14, P = 0.014) than DLY piglets. In the mouse model, the administration of A.&#xa0;muciniphila significantly increased SIgA levels (3.50 &#x3bc;g/mg, 95% CI: 0.59, 6.4, P = 0.018), SIgA-coated bacteria abundance (9.06%, 95% CI: 4, 14, P = 0.018), and IgA[+] plasma cell counts (6.1%, 95% CI: 4.3, 8, P = 0.005). In the pig experiments, the oral administration of A.&#xa0;muciniphila to LY piglets significantly enhanced intestinal SIgA concentrations (4.22 &#x3bc;g/mg, 95% CI: 0.37, 8.5, P = 0.034) and altered the SIgA-coated bacterial landscape.<br><br>CONCLUSIONS: Early intervention with A.&#xa0;muciniphila in nursing piglets can increases intestinal SIgA production and alter the reactivity toward commensal bacteria upon early weaning.}, }
@article {pmid39527509, year = {2024}, author = {Illidge, S and Kort, R and Hertzberger, R and , }, title = {'From women for women': A citizen science approach engaging women in the isolation and application of the vaginal health-associated bacterium Lactobacillus crispatus.}, journal = {PloS one}, volume = {19}, number = {11}, pages = {e0308526}, pmid = {39527509}, issn = {1932-6203}, mesh = {Humans ; Female ; *Vagina/microbiology ; *Probiotics ; *Lactobacillus crispatus/isolation &amp; purification/genetics ; Adult ; *Vaginosis, Bacterial/microbiology/diagnosis ; *Microbiota ; Middle Aged ; Young Adult ; }, abstract = {A vaginal microbiome rich in Lactobacillus crispatus is associated with good reproductive and sexual health outcomes. Dysbiosis, indicated by the loss of Lactobacillus crispatus, is a risk factor for urogenital infections, such as the clinical diagnosis of bacterial vaginosis (BV) or urinary tract infections. While many scientists have explored probiotics using a conventional pharmaceutical approach, concerns about accessibility and affordability prompt an investigation into a preventive approach using this naturally occurring bacterium. Our study aimed to explore a potential woman-friendly vaginal probiotic product using the naturally occurring bacterium, Lactobacillus crispatus. Citizen scientists actively participated in a two-day practicum and successfully performed the procedures using self-collected vaginal swabs. The practicum received positive responses from participants who demonstrated notable engagement and enthusiasm. With expert guidance, participants without a laboratory background were able to execute assigned tasks successfully. From the Dutch crispatus Citizen Science Collective of 48 women, 22 succeeded in isolating their own Lactobacillus crispatus strains using a Loop-Mediated Isothermal Amplification (LAMP) protocol for identification. Additionally, 48 metagenomes and 54 whole genomes from 22 individuals were sequenced for comparative analysis. This project effectively engaged a community of women in the isolation of Lactobacillus crispatus strains from their vaginal microbiota, followed by in vitro characterization experiments and a hackathon for the development of a probiotic product. Our citizen science approach opens up collaboration possibilities and new avenues for exploration of vaginal health, facilitating community involvement and the development of targeted interventions to enhance women's well-being.}, }
@article {pmid39526896, year = {2024}, author = {Wei, F and Jiang, H and Zhu, C and Zhong, L and Lin, Z and Wu, Y and Song, L}, title = {The co-fermentation of whole-grain black barley and quinoa improves murine cognitive impairment induced by a high-fat diet via altering gut microbial ecology and suppressing neuroinflammation.}, journal = {Food &amp; function}, volume = {15}, number = {23}, pages = {11667-11685}, doi = {10.1039/d4fo02704c}, pmid = {39526896}, issn = {2042-650X}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Diet, High-Fat/adverse effects ; *Cognitive Dysfunction ; *Mice, Inbred C57BL ; *Chenopodium quinoa/chemistry ; Male ; *Hordeum/chemistry ; *Fermentation ; Neuroinflammatory Diseases/metabolism ; Lactobacillus ; Hippocampus/metabolism ; Brain-Gut Axis ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {A high-fat diet (HFD) is associated with various adverse health outcomes, including cognitive impairment and an elevated risk of neurodegenerative conditions. This relationship is partially attributed to the influence of an HFD on the gut microbiota. The objective of this research was to evaluate the neuroprotective benefits of co-fermented black barley and quinoa with Lactobacillus (FG) against cognitive impairments triggered by an HFD and to investigate the microbiota-gut-brain axis mechanisms involved. C57BL/6J mice were randomized into four groups: the normal control group (NC, n = 10), the high-fat diet group (HFD, n = 10), the high-fat diet group supplemented with FG (HFG, 10 mL per kg BW, n = 10), and the high-fat diet group supplemented with Lactobacillus (HFL, 10 mL per kg BW, n = 10). Our results showed that the FG intervention enhanced the behavioral and locomotor skills of the mice, elevated the levels of dopamine (DA) and norepinephrine (NPI) in brain tissues, and alleviated synaptic ultrastructural damage in the hippocampus. Furthermore, FG intervention was observed to exert a protective effect on both the blood-brain barrier and the colonic barrier, as evidenced by an increase in the mRNA levels of Zona occludens-1 (ZO-1), Claudin-4, and Occludin in the hippocampus and colon. These beneficial effects may be attributed to FG's regulation of gut microbiota dysbiosis, which involves the restoration of intestinal flora diversity, reduction of the Firmicutes/Bacteroidetes (F/B) ratio, and a decrease in the levels of pro-inflammatory bacteria such as s_Escherichia coli E and g_Escherichia; moreover, there was an increase in the abundances of anti-inflammatory bacteria, such as s_Bacteroides thetaiotaomicron and s_Parabacteroides goldsteinii. Metagenomic analysis revealed that the FG treatment downregulated the lipopolysaccharide (LPS) pathway and upregulated neurotransmitter biosynthetic pathways. These probiotic effects of FG resulted in reduced production and "leakage" of LPS and decreased mRNA expression of Toll-like receptor 4 (Tlr4), cluster of differentiation 14 (CD14), and myeloid differentiation factor 88 (Myd88) in hippocampal and colon tissues. Consequently, a reduction was observed in the levels of inflammatory cytokines in the serum, hippocampus, and colon, along with suppression of the immunoreactivity of microglia and astrocytes. Our results suggest that FG may serve as an intervention strategy for preventing cognitive impairments caused by an HFD.}, }
@article {pmid39526401, year = {2025}, author = {Jiang, Y and Wang, Y and Che, L and Yang, S and Zhang, X and Lin, Y and Shi, Y and Zou, N and Wang, S and Zhang, Y and Zhao, Z and Li, SC}, title = {GutMetaNet: an integrated database for exploring horizontal gene transfer and functional redundancy in the human gut microbiome.}, journal = {Nucleic acids research}, volume = {53}, number = {D1}, pages = {D772-D782}, pmid = {39526401}, issn = {1362-4962}, support = {20220814183301001//Shenzhen Science and Technology Program/ ; }, mesh = {*Gene Transfer, Horizontal ; Humans ; *Gastrointestinal Microbiome/genetics ; *Databases, Genetic ; Metagenome/genetics ; Metagenomics/methods ; Bacteria/genetics/classification ; }, abstract = {Metagenomic studies have revealed the critical roles of complex microbial interactions, including horizontal gene transfer (HGT) and functional redundancy (FR), in shaping the gut microbiome's functional capacity and resilience. However, the lack of comprehensive data integration and systematic analysis approaches has limited the in-depth exploration of HGT and FR dynamics across large-scale gut microbiome datasets. To address this gap, we present GutMetaNet (https://gutmetanet.deepomics.org/), a first-of-its-kind database integrating extensive human gut microbiome data with comprehensive HGT and FR analyses. GutMetaNet contains 21 567 human gut metagenome samples with whole-genome shotgun sequencing data related to various health conditions. Through systematic analysis, we have characterized the taxonomic profiles and FR profiles, and identified 14 636 HGT events using a shared reference genome database across the collected samples. These HGT events have been curated into 8049 clusters, which are annotated with categorized mobile genetic elements, including transposons, prophages, integrative mobilizable elements, genomic islands, integrative conjugative elements and group II introns. Additionally, GutMetaNet incorporates automated analyses and visualizations for the HGT events and FR, serving as an efficient platform for in-depth exploration of the interactions among gut microbiome taxa and their implications for human health.}, }
@article {pmid39526369, year = {2025}, author = {Dmitrijeva, M and Ruscheweyh, HJ and Feer, L and Li, K and Miravet-Verde, S and Sintsova, A and Mende, DR and Zeller, G and Sunagawa, S}, title = {The mOTUs online database provides web-accessible genomic context to taxonomic profiling of microbial communities.}, journal = {Nucleic acids research}, volume = {53}, number = {D1}, pages = {D797-D805}, pmid = {39526369}, issn = {1362-4962}, support = {//ETH Zurich/ ; 51NF40_180575//NCCR/ ; //European Molecular Biology Laboratory/ ; 031A537B//Federal Ministry of Education and Research/ ; LT0050/2023-L//Human Frontier Science Program/ ; 205321_184955/SNSF_/Swiss National Science Foundation/Switzerland ; 101118531/ERC_/European Research Council/International ; /SNSF_/Swiss National Science Foundation/Switzerland ; }, mesh = {*Internet ; *Databases, Genetic ; *Metagenome ; *Microbiota/genetics ; Genomics/methods ; Bacteria/genetics/classification ; Metagenomics/methods ; Phylogeny ; Software ; Genome, Bacterial ; }, abstract = {Determining the taxonomic composition (taxonomic profiling) is a fundamental task in studying environmental and host-associated microbial communities. However, genome-resolved microbial diversity on Earth remains undersampled, and accessing the genomic context of taxa detected during taxonomic profiling remains a challenging task. Here, we present the mOTUs online database (mOTUs-db), which is consistent with and interfaces with the mOTUs taxonomic profiling tool. It comprises 2.83 million metagenome-assembled genomes (MAGs) and 919 090 single-cell and isolate genomes from 124 295 species-level taxonomic units. In addition to being one of the largest prokaryotic genome resources to date, all MAGs in the mOTUs-db were reconstructed de novo in 117 902 individual samples by abundance correlation of scaffolds across multiple samples for improved quality metrics. The database complements the Genome Taxonomy Database, with over 50% of its species-level taxonomic groups being unique. It also offers interactive querying, enabling users to explore and download genomes at various taxonomic levels. The mOTUs-db is accessible at https://motus-db.org.}, }
@article {pmid39523762, year = {2025}, author = {El Mouzan, M and Al Quorain, A and Assiri, A and Almasoud, A and Alsaleem, B and Aladsani, A and Al Sarkhy, A}, title = {Gut fungal profile in new onset treatment-naïve ulcerative colitis in Saudi children.}, journal = {Saudi journal of gastroenterology : official journal of the Saudi Gastroenterology Association}, volume = {31}, number = {1}, pages = {28-33}, pmid = {39523762}, issn = {1998-4049}, mesh = {Humans ; *Colitis, Ulcerative/microbiology/epidemiology ; Child ; Male ; Saudi Arabia/epidemiology ; Adolescent ; Female ; *Feces/microbiology ; Child, Preschool ; Gastrointestinal Microbiome ; Infant ; Young Adult ; Candida/isolation &amp; purification/genetics ; Case-Control Studies ; DNA, Fungal/genetics/analysis ; Saccharomyces cerevisiae/genetics/isolation &amp; purification ; Dysbiosis/microbiology/epidemiology ; }, abstract = {BACKGROUND: Although the role of fungi in gut inflammation in IBD has been suggested, data are still limited in ulcerative colitis (UC). Our aim was to describe the gut fungal profile in a pediatric UC in Saudi Arabia.<br><br>METHODS: Fecal samples from children with UC and control samples provided by healthy school children were collected. The fungal DNA was analyzed using Shotgun metagenomic procedures. Shannon alpha diversity, beta diversity, differential abundance, random forest classification algorithm, and area under the curve were analyzed.<br><br>RESULTS: There were 20 children with UC and 20 healthy school children. The median age and range were 13 (0.5-21) and 13 (7-16) years for children with UC and controls, respectively. Male subjects were 40% and 35% for UC and controls, respectively. At diagnosis, the UC extent was E4 (38%); E3 (25%); E2 (37%) and 35% had a PUCAI &#x2265;65. The reduction of alpha diversity and the significant dissimilarity in children with UC were similar to those of most published studies. However, a significant difference was found at all taxa levels with a remarkable enhancement of Candida genus and Saccharomyces cerevisiae in children with UC. Three species were identified as fungal signatures and an area under the curve of 98.4% (95.1-100% CI), indicating an association with UC that has not been reported thus far.<br><br>CONCLUSION: We report significant fungal dysbiosis in children with UC consistent with published literature. However, the report of potential fungal signature and a strong association with UC deserves further studies with a bigger sample size from other populations.}, }
@article {pmid39523638, year = {2024}, author = {Munjita, SM and Mubemba, B and Tembo, J and Bates, M and Munsaka, S}, title = {Rhipicephalus simus ticks: new hosts for phleboviruses.}, journal = {Parasitology}, volume = {151}, number = {9}, pages = {962-970}, pmid = {39523638}, issn = {1469-8161}, support = {RIA2016E-1609//European and Developing Countries Clinical Trials Partnership/ ; }, mesh = {*Rhipicephalus/microbiology/virology ; *Phlebovirus/classification/genetics ; Metagenome/genetics ; Genome, Viral/genetics ; Zambia ; Phylogeny ; Biodiversity ; Animals ; Disease Vectors ; }, abstract = {Ticks are widespread arthropods that transmit microorganisms of veterinary and medical significance to vertebrates, including humans. Rhipicephalus simus, an ixodid tick frequently infesting and feeding on humans, may play a crucial role in transmitting infectious agents across species. Despite the known association of many Rhipicephalus ticks with phleboviruses, information on R. simus is lacking. During a study in a riverine area in Lusaka Zambia, ten R. simus ticks were incidentally collected from the grass and bushes and subjected to metagenomic next generation sequencing (mNGS) in 2 pools of 5. Analysis detected a diverse microbial profile, including bacteria 82% (32/39), fungi 15.4% (6/39), and viruses 2.6% (1/39). Notably, viral sequence LSK-ZM-102022 exhibited similarity to tick phleboviruses, sharing 74.92% nucleotide identity in the RdRp gene and 72% in the NP gene with tick-borne phlebovirus (TBPV) from Greece and Romania, respectively. Its RNA-dependent RNA polymerase (RdRp) encoding region carried conserved RdRp and endonuclease domains characteristic of phenuiviridae viruses. Phylogenetic analysis positioned LSK-ZM-102022 in a distinct but lone lineage within tick phleboviruses basal to known species like brown dog tick phlebovirus and phlebovirus Antigone. Pair-wise genetic distance analysis revealed similar findings. This study emphasizes the urgency of further research on the ecology, transmission dynamics, and pathogenic potential of LSK-ZM-102022 and related TBPVs, crucial for local and global preparedness against emerging tick-borne diseases.}, }
@article {pmid39523457, year = {2024}, author = {Chen, Y and Liu, S and Tan, S and Zheng, Y and Chen, Y and Yang, C and Lin, S and Mi, Y and Li, W}, title = {KRAS mutations promote the intratumoral colonization of enterotoxigenic bacteroides fragilis in colorectal cancer through the regulation of the miRNA3655/SURF6/IRF7/IFNβ axis.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2423043}, pmid = {39523457}, issn = {1949-0984}, mesh = {*Colorectal Neoplasms/microbiology/genetics/metabolism/pathology ; Humans ; *Bacteroides fragilis/genetics/metabolism ; *Proto-Oncogene Proteins p21(ras)/genetics/metabolism ; *MicroRNAs/genetics/metabolism ; *Mutation ; Animals ; Mice ; *Interferon-beta/metabolism/genetics ; *Interferon Regulatory Factor-7/metabolism/genetics ; Cell Line, Tumor ; Gastrointestinal Microbiome ; Mice, Nude ; Gene Expression Regulation, Neoplastic ; Female ; }, abstract = {KRAS mutations are associated with poor prognosis in colorectal cancer (CRC). Although the association between the gut microbiota and CRC has been extensively documented, it is unclear whether KRAS mutations can regulate the gut microbiota. Metagenomics has identified changes in the diversity of the gut microbiota in CRC due to KRAS mutations. Specifically, KRAS mutations positively correlate with the abundance of the bacteroides. Understanding how to regulate the classic carcinogenic bacterium within the bacteroides, such as enterotoxigenic bacteroides fragilis (ETBF), to enhance treatment efficacy of tumors is a key focus of research. Mechanistically, we found that the reduction of miR3655 is indispensable for KRAS mutation-promoted proliferation of CRC and the abundance of ETBF. miR3655 targets SURF6 to inhibit its transcription. Further transcriptomic sequencing revealed that SURF6 promotes intratumoral colonization of ETBF in CRC by inhibiting the nuclear translocation and transcription levels of the IRF7, affecting the activation of the IFNβ promoter. Regulating miR3655 and SURF6 can promote IFNβ secretion in CRC, directly killing ETBF. These data indicate that KRAS mutations affect the intratumoral colonization of ETBF in CRC through the miR3655/SURF6/IRF7/IFNβ axis. This provides new potential strategies for treating CRC associated with KRAS mutations or high levels of ETBF.}, }
@article {pmid39523344, year = {2024}, author = {You, X and Yan, J and Herzog, J and Nobakhti, S and Campbell, R and Hoke, A and Hammamieh, R and Sartor, RB and Shefelbine, S and Kacena, MA and Chakraborty, N and Charles, JF}, title = {Bone loss with aging is independent of gut microbiome in mice.}, journal = {Bone research}, volume = {12}, number = {1}, pages = {65}, pmid = {39523344}, issn = {2095-4700}, support = {R01-AG046257//U.S. Department of Health &amp; Human Services | NIH | National Institute on Aging (U.S. National Institute on Aging)/ ; P30 AR075042/AR/NIAMS NIH HHS/United States ; R01 AG046257/AG/NIA NIH HHS/United States ; P30-AR070253//U.S. Department of Health &amp; Human Services | NIH | National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)/ ; 997397//Crohn's and Colitis Foundation (Crohn's &amp; Colitis Foundation)/ ; P40-OD010995//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; P30-DK034987//U.S. Department of Health &amp; Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes &amp; Digestive &amp; Kidney Diseases)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/physiology ; *Aging/physiology ; Male ; Mice ; Feces/microbiology ; RNA, Ribosomal, 16S/genetics ; Bone Resorption/microbiology ; Germ-Free Life ; }, abstract = {Emerging evidence suggests a significant role of gut microbiome in bone health. Aging is well recognized as a crucial factor influencing the gut microbiome. In this study, we investigated whether age-dependent microbial change contributes to age-related bone loss in CB6F1 mice. The bone phenotype of 24-month-old germ-free (GF) mice was indistinguishable compared to their littermates colonized by fecal transplant at 1-month-old. Moreover, bone loss from 3 to 24-month-old was comparable between GF and specific pathogen-free (SPF) mice. Thus, GF mice were not protected from age-related bone loss. 16S rRNA gene sequencing of fecal samples from 3-month and 24-month-old SPF males indicated an age-dependent microbial shift with an alteration in energy and nutrient metabolism potential. An integrative analysis of 16S predicted metagenome function and LC-MS fecal metabolome revealed an enrichment of protein and amino acid biosynthesis pathways in aged mice. Microbial S-adenosyl methionine metabolism was increased in the aged mice, which has previously been associated with the host aging process. Collectively, aging caused microbial taxonomic and functional alteration in mice. To demonstrate the functional importance of young and old microbiome to bone, we colonized GF mice with fecal microbiome from 3-month or 24-month-old SPF donor mice for 1 and 8 months. The effect of microbial colonization on bone phenotypes was independent of the microbiome donors' age. In conclusion, our study indicates age-related bone loss occurs independent of gut microbiome.}, }
@article {pmid39522897, year = {2024}, author = {Zhang, H and Yang, X and Chen, J and Jiang, Q and Yao, S and Chen, L and Xiang, X}, title = {Investigation of the mechanism by which Tegillarca granosa polysaccharide regulates non-alcoholic fatty liver disease in mice by modulating Lactobacillus Johnsonii.}, journal = {International journal of biological macromolecules}, volume = {282}, number = {Pt 6}, pages = {137259}, doi = {10.1016/j.ijbiomac.2024.137259}, pmid = {39522897}, issn = {1879-0003}, mesh = {Animals ; *Non-alcoholic Fatty Liver Disease/metabolism/drug therapy ; *Polysaccharides/pharmacology/chemistry ; Mice ; *Gastrointestinal Microbiome/drug effects ; *Diet, High-Fat/adverse effects ; *Lactobacillus johnsonii/metabolism ; *Lipid Metabolism/drug effects ; Male ; Disease Models, Animal ; Liver/drug effects/metabolism ; RNA, Ribosomal, 16S/genetics ; Mice, Inbred C57BL ; }, abstract = {Non-alcoholic fatty liver disease (NAFLD), a prevalent chronic liver disease, is marked by excessive lipid deposition in the liver without alcohol abuse. Scapharca subcrenatum, a major Chinese farmed bivalve, yields S. subcrenatum polysaccharide (TGP), an active substance with known biological activity. Previous studies revealed TGP's significant regulatory effect on a high-fat diet (HFD)-induced NAFLD in mice. However, the precise mechanisms, particularly involving gut microbiota, remain unclear. In the current study, an antibiotic-treated mouse model was established to determine the mechanistic role of the gut microbiota in the observed anti-obesity effects of TGP. In addition, 16S rRNA genomic and metagenome-derived taxonomic analyses were performed to assess the gut microbial populations. The results showed that TGP selectively enhanced the number of the eosinophilic bacterium Lactobacillus johnsonii, which was reduced in HFD mice. Of note, the oral administration of L. johnsonii formulations to HFD mice alleviated NAFLD, and this was related to regulating lipid metabolism and the accumulation of lipids in the liver. Therefore, the current study uncovered a potential pathway for developing NAFLD treatment strategies based on the interaction between TGP and the gut microbiota.}, }
@article {pmid39522830, year = {2025}, author = {Matamoros, BR and Serna, C and Wedel, E and Montero, N and Kirpekar, F and Gonzalez-Zorn, B}, title = {NpmC - a novel A1408 16S rRNA methyltransferase in the gut of humans and animals.}, journal = {International journal of antimicrobial agents}, volume = {65}, number = {1}, pages = {107382}, doi = {10.1016/j.ijantimicag.2024.107382}, pmid = {39522830}, issn = {1872-7913}, mesh = {*Methyltransferases/genetics/metabolism ; *RNA, Ribosomal, 16S/genetics ; *Aminoglycosides/pharmacology/metabolism ; Humans ; Animals ; *Escherichia coli/genetics/drug effects ; Anti-Bacterial Agents/pharmacology ; Sisomicin/analogs &amp; derivatives/pharmacology ; Gastrointestinal Microbiome ; Escherichia coli Proteins/genetics/metabolism ; Methylation ; Drug Resistance, Bacterial/genetics ; Microbial Sensitivity Tests ; }, abstract = {NpmA and NpmB are 16S rRNA methyltransferases that act on residue A1408 and confer high-level resistance to almost all aminoglycosides; however, these methyltransferases are rarely reported. A novel gene, npmC, was identified after analysisng all world-wide available metagenomic projects in a One Health context. This gene has a high level of similarity (91.5%) with npmA and up to 92.7% similarity at amino acidic level. The protein encoded by this gene presents the conserved motifs required for A1408 methylation. npmC was synthesized and its expression in Escherichia coli resulted in a high level of resistance to 4,5-disubstituted 2-deoxystreptamine (2-DOS) and 4-monosubstituted 2-DOS aminoglycosides, as well as moderate resistance to 4,6-disusbstituted 2-DOS aminoglycosides, including the last resort aminoglycoside, plazomicin. Methylation at residue A1408 was confirmed by mass spectrometry assays. Analysis of the npmC gene background revealed that its genetic context was associated with different insertion sequences that could mobilise the gene. Similarities in the genetic context between npmC and npmA indicate that they share a common ancestor. The immediate genetic context of this methyltransferase indicates a high relationship to the Eubacteriales order. This finding reveals the dark matter of the microbiome as a potential source of novel resistance genes, expands the list of the true pan-aminoglycoside 16S rRNA methyltransferases, which threaten the usefulness and development of next-generation aminoglycosides.}, }
@article {pmid39522205, year = {2024}, author = {Wang, Z and Cao, H and Jin, J and Thorley, E and Cava, J and Sun, Y and Zhang, L and Wang, N and Yang, Z}, title = {Diel asynchrony in the expanded characteristics of toxic cyanobacterial blooms revealed by integrated metabolomics and metagenomics.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {136403}, doi = {10.1016/j.jhazmat.2024.136403}, pmid = {39522205}, issn = {1873-3336}, mesh = {*Metabolomics ; *Cyanobacteria/genetics/metabolism ; *Metagenomics ; *Lakes/microbiology ; China ; Biomass ; Microbiota ; Phytoplankton/genetics/metabolism ; }, abstract = {We establish a field metabolomics protocol in Lake Taihu (China) and determined two critical parameters: the minimum amount of biomass for metabolomics and the daytime when metabolomes are stable. The minimum biomass is 475-950 µg dry weight (DW) or 204-408 ng DNA for F (phytoplankton) samples, and 940-1760 µg DW or 193-514 ng DNA for W (whole-water) samples. In a diel cycle, temporal taxonomical composition, metabolic state, and response to physiochemical factors progressed asynchronously between the F and W microbiomes. F peak growth (metabolic steady state) occurred 12-17 pm while W around 12 pm in metabolite identity, concentration, and molecular weight. 482 (∼50 %) metabolites highly correlated between the F and W microbiomes. Integrated analysis revealed different systematic changes between F and W sample, in taxon-associated metabolites, reactions, and biological functions: e.g., carbon metabolism and bioenergetics in F and amino acid metabolism and central metabolism in W samples. Metagenomics discovered important interspecific and intraspecific diversity using single-nucleotide polymorphism, and interactions between cyanobacteria and epibiotic bacteria. Diel intraspecific diversity shift inferred Microcystis aeruginosa and Anabaena sp. have different temperature optima experimentally verified. This integrated multi-omics protocol expands water microbiome analyses from conventional structure and function to diversity dynamics and interspecific metabolism and ecophysiology.}, }
@article {pmid39522045, year = {2024}, author = {Cabezas, MP and Fonseca, NA and Muñoz-Mérida, A}, title = {MIMt: a curated 16S rRNA reference database with less redundancy and higher accuracy at species-level identification.}, journal = {Environmental microbiome}, volume = {19}, number = {1}, pages = {88}, pmid = {39522045}, issn = {2524-6372}, support = {UIDB/04050/2020//FCT/ ; NORTE-01-0246-FEDER-000063//NORTE2020/ ; NORTE-01-0246-FEDER-000063//NORTE2020/ ; }, abstract = {MOTIVATION: Accurate determination and quantification of the taxonomic composition of microbial communities, especially at the species level, is one of the major issues in metagenomics. This is primarily due to the limitations of commonly used 16S rRNA reference databases, which either contain a lot of redundancy or a high percentage of sequences with missing taxonomic information. This may lead to erroneous identifications and, thus, to inaccurate conclusions regarding the ecological role and importance of those microorganisms in the ecosystem.<br><br>RESULTS: The current study presents MIMt, a new 16S rRNA database for archaea and bacteria's identification, encompassing 47&#xa0;001 sequences, all precisely identified at species level. In addition, a MIMt2.0 version was created with only curated sequences from RefSeq Targeted loci with 32&#xa0;086 sequences. MIMt aims to be updated twice a year to include all newly sequenced species. We evaluated MIMt against Greengenes, RDP, GTDB and SILVA in terms of sequence distribution and taxonomic assignments accuracy. Our results showed that MIMt contains less redundancy, and despite being 20 to 500 times smaller than existing databases, outperforms them in completeness and taxonomic accuracy, enabling more precise assignments at lower taxonomic ranks and thus, significantly improving species-level identification.}, }
@article {pmid39521075, year = {2024}, author = {Oliveira, OA and Estrada, CSD and Vidal, LO and Junior, LCC and Abril, G and Rezende, CE and Thompson, CC and Thompson, FL and Tschoeke, DA and Garcia, GD}, title = {Insights into the water microbiome dynamics of a large tropical estuary transition.}, journal = {The Science of the total environment}, volume = {957}, number = {}, pages = {177411}, doi = {10.1016/j.scitotenv.2024.177411}, pmid = {39521075}, issn = {1879-1026}, mesh = {*Estuaries ; *Microbiota ; Tropical Climate ; Environmental Monitoring ; Bacteria/classification/genetics ; Seasons ; Water Microbiology ; Brazil ; Biodiversity ; Methane/metabolism ; }, abstract = {Tropical estuarine systems play several ecological roles, such as acting as a nursery for biodiversity and cycling nutrients and greenhouse gases. However, the phylogenetic and metabolic diversity of estuarine microbiomes is not completely known. Furthermore, it is unclear how seasonal patterns may affect microbial diversity in these systems. The aim of the present study was to determine the metagenomic diversity and its major drivers in a large tropical estuarine system dominated by a mangrove forest in the South Atlantic around the Paraiba do Sul River. In total, 12.16 million shotgun sequences were generated (dry season: n = 8; wet season: n = 5), and water-quality parameters were evaluated for all locations. Metagenomic sequences were distributed between two patterns: (1) the dry season, in which the families Rhodobactereaceae and Flavobactereaceae increased, and (2) the wet season, in which Moraxellaceae, Pseudomonadaceae, Pseudoalteromonadaceae were more abundant. The dry season was characterized by higher salinity, nitrogen fixation, nitrification, and photosynthetic potential. In contrast, the wet season had higher carbon dioxide (CO2) and methane (CH4) production and a higher abundance of methanogenic, methylotrophic, and chemoorganotrophic bacteria in samples with low salinity. These findings suggest a possible relationship with the production of greenhouse gases during the wet period.}, }
@article {pmid39520912, year = {2024}, author = {Zhao, L and Weng, W and Ni, M and Shen, H and Zhang, S and Chen, Y and Jia, R and Fan, L and Mao, Y and Qin, L and Liu, S and Wang, Y}, title = {Rubidium salt can effectively relieve the symptoms of DSS-induced ulcerative colitis.}, journal = {Biomedicine &amp; pharmacotherapy = Biomedecine &amp; pharmacotherapie}, volume = {181}, number = {}, pages = {117574}, doi = {10.1016/j.biopha.2024.117574}, pmid = {39520912}, issn = {1950-6007}, mesh = {*Colitis, Ulcerative/drug therapy/microbiology ; Animals ; *Gastrointestinal Microbiome/drug effects ; *Dextran Sulfate ; Male ; Mice ; Mice, Inbred C57BL ; Salts ; Colon/drug effects/pathology/metabolism/microbiology ; Disease Models, Animal ; }, abstract = {Inflammatory bowel disease (IBD) is a chronic condition that afflicts individuals repeatedly and cannot be cured at present, which has seriously affected the quality of life of patients. Minerals Containing Rubidium (MCR) from Guangxi Yuechengling, which Professor Zhao Lichun purified, were explored. Against this backdrop, the present study investigates the efficacy of rubidium salt in ulcerative colitis. Rubidium salt reduced levels of inflammatory markers and improved intestinal barrier function through the Elisa kit, immunohistochemistry, and qPCR. Next, we detected the level of short-chain fatty acid and found that the content of propanoic acid, butyric acid, and n-butyric acid increased after treatment with rubidium salt. We used fecal metagenomics to explore the underlying reasons further and found that rubidium salt significantly adjusted the structure of intestinal flora, increased the abundance of beneficial bacteria such as lactobacillus and bifidobacterium, and inhibited the abundance of harmful bacteria such as Enterobacteriaceae and Escherichia coli. We also learned that rubidium salt directly weakened pathogenic bacteria's infection and survival ability by reducing the expression of virulence factors such as fimH, invA, and hilA and virulence genes such as acrA and ompR. Overall, rubidium salt can reduce harmful bacteria and increase beneficial bacteria. The increased beneficial bacteria help enhance the gut barrier and regulate inflammatory factors by raising the levels of short-chain fatty acids. A strengthened gut barrier further stabilizes microbial homeostasis, ultimately alleviating ulcerative colitis.}, }
@article {pmid39520707, year = {2024}, author = {Lu, T and Ericsson, AC and Dietz, ZK and Cato, AK and Coghill, LM and Picking, WD and Picking, WL}, title = {Impact of an intranasal L-DBF vaccine on the gut microbiota in young and elderly mice.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2426619}, pmid = {39520707}, issn = {1949-0984}, support = {R01 AI138970/AI/NIAID NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Administration, Intranasal ; Mice ; *Feces/microbiology ; Female ; Shigella Vaccines/immunology/administration &amp; dosage/genetics ; Lung/microbiology/immunology ; Shigella/immunology/genetics ; RNA, Ribosomal, 16S/genetics ; Age Factors ; Mice, Inbred BALB C ; Vaccination ; }, abstract = {Shigella spp. cause bacillary dysentery (shigellosis) with high morbidity and mortality in low- and middle-income countries. Infection occurs through the fecal-oral route and can be devastating for vulnerable populations, including infants and the elderly. These bacteria invade host cells using a type III secretion system (T3SS). No licensed vaccine yet exists for shigellosis, but we have generated a recombinant fusion protein, L-DBF, combining the T3SS needle tip protein (IpaD), translocator protein (IpaB), and the LTA1 subunit of enterotoxigenic E. coli labile toxin, which offers broad protection in a mouse model of lethal pulmonary infection. The L-DBF vaccine protects high-risk groups, including young and elderly mice. Here, we investigated how the gut microbiota of young and elderly mice responds to intranasal L-DBF vaccination formulated in an oil-in-water emulsion (ME). Samples from lungs, small intestines, and feces were collected on day 14 after 2 or 3 doses of L-DBF in ME. 16S rRNA gene sequencing revealed age-dependent changes in gut microbiota post-vaccination. The vaccine-induced changes were more prominent in the elderly mice and were most significant in the intestinal tract, indicating that vaccination by the intranasal route can have a tremendous impact on the gut environment. These findings provide insight into the communication between the intranasal mucosal surface following subunit vaccination and the microbiota at a distant mucosal site, thereby highlighting the impact of vaccination and the host's microbiome.}, }
@article {pmid39520618, year = {2025}, author = {Men, Z and Chen, Z and Gu, X and Wang, Y and Zhang, X and Fang, F and Shen, M and Huang, S and Wu, S and Zhou, L and Bai, Z}, title = {Clinical relevance of lung microbiota composition in critically ill children with acute lower respiratory tract infections: insights from a retrospective analysis of metagenomic sequencing.}, journal = {European journal of clinical microbiology &amp; infectious diseases : official publication of the European Society of Clinical Microbiology}, volume = {44}, number = {1}, pages = {83-98}, pmid = {39520618}, issn = {1435-4373}, support = {H2023106//Medical Research Project of Jiangsu Provincial Commission of Health/ ; SKY2022178//Science and Technology Development Project of Suzhou/ ; SKJY2021108//Science and Technology Development Project of Suzhou/ ; BK20211077//Natural Science Foundation of Jiangsu Province/ ; BE2023714//Science and Technology Support Program of Jiangsu Province/ ; GSWS2019015//Gusu Health Talent Program/ ; ML13100423//Suzhou Medical College Clinician Scientist Program/ ; }, mesh = {Humans ; Retrospective Studies ; Male ; Female ; *Microbiota/genetics ; *Respiratory Tract Infections/microbiology/mortality ; Child, Preschool ; Metagenomics ; *Lung/microbiology ; Infant ; Child ; Critical Illness ; *Bacteria/classification/genetics/isolation &amp; purification ; Bronchoalveolar Lavage Fluid/microbiology ; High-Throughput Nucleotide Sequencing ; Prognosis ; Severity of Illness Index ; Clinical Relevance ; }, abstract = {PURPOSE: Acute lower respiratory tract infections (ALRIs) is a leading cause of child mortality worldwide. Metagenomic next-generation sequencing (mNGS) identifies ALRIs pathogens and explores the lung microbiota's role in disease severity and clinical outcomes. This study examines the association between lung microbiota and ALRIs outcomes in children, exploring its potential as a prognostic biomarker.<br><br>METHODS: We retrospectively analyzed mNGS data from the bronchoalveolar lavage fluid (BALF) of 83 pediatric ALRIs patients from 2019 to 2023. Microbial diversity and relative abundances of specific taxa were compared between survivor and non-survivor groups, as well as between varying severity levels. LEfSe was employed to identify key biomarkers related to survival and disease severity.<br><br>RESULTS: Among the 83 patients, 68 survived and 15 died. Patients were also divided into a low severity group (n&#x2009;=&#x2009;38) and a moderate-to-very-high severity group (n&#x2009;=&#x2009;45) according to mPIRO score at admission. Significant differences in beta diversity were observed between the survival groups and across different severity levels. Prevotella, Haemophilus and Veillonella exhibited higher abundances in both the survivor and low severity groups, suggesting their potential as predictors of better outcomes. Conversely, Enterococcus and Acinetobacter baumannii were more prevalent in the non-survivor and moderate-to-very-high severity groups. Additionally, Streptococcus pneumoniae and Streptococcus mitis showed increased abundances in survivors. LEfSe further revealed that these microorganisms may predict outcomes and severity in ALRIs.<br><br>CONCLUSION: Our findings underscore the complex relationship between lung microbiota and ALRIs, with specific microbial profiles associated with disease severity and clinical outcomes. This underscores the need for further research to explore and validate its prognostic predictive capacity.<br><br>CLINICAL TRIAL NUMBER: Not applicable.}, }
@article {pmid39520096, year = {2024}, author = {Logel, M and Tope, P and El-Zein, M and Gonzalez, E and Franco, EL}, title = {A Narrative Review of the Putative Etiologic Role and Diagnostic Utility of the Cervicovaginal Microbiome in Human Papillomavirus-Associated Cervical Carcinogenesis.}, journal = {Journal of medical virology}, volume = {96}, number = {11}, pages = {e70027}, pmid = {39520096}, issn = {1096-9071}, support = {//This work was supported by the Canadian Institutes of Health Research (grant FDN-143347 to E.L.F.) and Fonds de Recherche du Qu&#xe9;bec - Sant&#xe9;./ ; }, mesh = {Humans ; Female ; *Microbiota ; *Uterine Cervical Neoplasms/virology/diagnosis/microbiology ; *Papillomavirus Infections/diagnosis/virology/microbiology ; *Vagina/microbiology/virology ; *Cervix Uteri/microbiology/virology ; *Papillomaviridae/genetics/isolation &amp; purification/classification ; Metagenomics/methods ; Carcinogenesis ; RNA, Ribosomal, 16S/genetics ; Bacteria/isolation &amp; purification/genetics/classification ; Human Papillomavirus Viruses ; }, abstract = {The cervicovaginal microbiome (CVM) may contribute to human papillomavirus (HPV)-associated cervical carcinogenesis. We summarized the literature on the CVM in cervical carcinogenesis by searching Medline, Web of Science, and Embase for articles that sequenced the CVM using metagenomics. Additionally, we identified studies assessing the diagnostic role of the CVM in cervical carcinogenesis by searching PubMed. We performed an environmental scan of Google and Google Scholar to review common CVM characterization techniques. Twenty-eight records presented or summarized associations between the CVM and HPV acquisition, prevalence, persistence, clearance, and cervical lesions or cancer, while three studies identified bacterial taxa detecting high-risk HPV prevalence or cervical lesions. The area under the curve ranged from 0.802 to 0.952. 16S ribosomal RNA gene sequencing and whole metagenome sequencing have sufficient resolution to study the CVM bacteriome. Bacterial communities may have important implications in cervical cancer; however, there is a need for methodological standardization for CVM characterization.}, }
@article {pmid39519025, year = {2024}, author = {Zhang, T and Zhao, C and Li, N and He, Q and Gao, G and Sun, Z}, title = {Longitudinal and Multi-Kingdom Gut Microbiome Alterations in a Mouse Model of Alzheimer's Disease.}, journal = {International journal of molecular sciences}, volume = {25}, number = {21}, pages = {}, pmid = {39519025}, issn = {1422-0067}, support = {32325040//National Natural Science Foundation of China/ ; U22A20540//National Natural Science Foundation of China/ ; 2022YFD2100700//National Key R&amp;D Program of China/ ; 2022YFSJ0017//Inner Mongolia Science &amp; Technology Planning Project/ ; 2022110//Research support funds for high-level talents in public institutions at the autonomous region level in Inner Mongolia/ ; }, mesh = {Animals ; *Alzheimer Disease/microbiology/virology ; *Gastrointestinal Microbiome/genetics ; Mice ; *Disease Models, Animal ; Dysbiosis/microbiology ; Feces/microbiology ; Bacteria/classification/genetics ; Archaea/genetics ; Metagenomics/methods ; Fungi/genetics/classification ; Metagenome ; Longitudinal Studies ; }, abstract = {Gut microbial dysbiosis, especially bacteriome, has been implicated in Alzheimer's disease (AD). However, nonbacterial members of the gut microbiome in AD, such as the mycobiome, archaeome, and virome, are unexplored. Here, we perform higher-resolution shotgun metagenomic sequencing on fecal samples collected longitudinally from a mouse model of AD to investigate longitudinal and multi-kingdom gut microbiome profiling. Shotgun metagenomic sequencing of fecal samples from AD mice and healthy mice returns 41,222 bacterial, 414 fungal, 1836 archaeal, and 1916 viral species across all time points. The ecological network pattern of the gut microbiome in AD mice is characterized by more complex bacterial-bacterial interactions and fungal-fungal interactions, as well as simpler archaeal-archaeal interactions and viral-viral interactions. The development of AD is accompanied by multi-kingdom shifts in the gut microbiome composition, as evidenced by the identification of 1177 differential bacterial, 84 differential fungal, 59 differential archaeal, and 10 differential viral species between healthy and AD mice across all time points. In addition, the functional potential of the gut microbiome is partially altered in the development of AD. Collectively, our findings uncover longitudinal and multi-kingdom gut microbiome alterations in AD and provide a motivation for considering microbiome-based therapeutics during the prevention and treatment of AD.}, }
@article {pmid39518901, year = {2024}, author = {Nahon, SMR and Trindade, FC and Yoshiura, CA and Martins, GC and Costa, IRCD and Costa, PHO and Herrera, H and Balestrin, D and Godinho, TO and Marchiori, BM and Valadares, RBDS}, title = {Impact of Agroforestry Practices on Soil Microbial Diversity and Nutrient Cycling in Atlantic Rainforest Cocoa Systems.}, journal = {International journal of molecular sciences}, volume = {25}, number = {21}, pages = {}, pmid = {39518901}, issn = {1422-0067}, support = {//VALE Research Institute/ ; }, mesh = {*Soil Microbiology ; *Cacao/microbiology/metabolism/genetics ; *Rainforest ; Soil/chemistry ; Agriculture/methods ; Nitrogen/metabolism ; Nitrogen Cycle ; Biodiversity ; Forestry/methods ; Microbiota ; Metagenomics/methods ; Ecosystem ; }, abstract = {Microorganisms are critical indicators of soil quality due to their essential role in maintaining ecosystem services. However, anthropogenic activities can disrupt the vital metabolic functions of these microorganisms. Considering that soil biology is often underestimated and traditional assessment methods do not capture its complexity, molecular methods can be used to assess soil health more effectively. This study aimed to identify the changes in soil microbial diversity and activity under different cocoa agroforestry systems, specially focusing on taxa and functions associated to carbon and nitrogen cycling. Soils from three different cocoa agroforestry systems, including a newly established agroforestry with green fertilization (GF), rubber (Hevea brasiliensis)-cocoa intercropping (RC), and cocoa plantations under Cabruca (cultivated under the shave of native forest) (CAB) were analyzed and compared using metagenomic and metaproteomic approaches. Samples from surrounding native forest and pasture were used in the comparison, representing natural and anthropomorphic ecosystems. Metagenomic analysis revealed a significant increase in Proteobacteria and Basidiomycota and the genes associated with dissimilatory nitrate reduction in the RC and CAB areas. The green fertilization area showed increased nitrogen cycling activity, demonstrating the success of the practice. In addition, metaproteomic analyses detected enzymes such as dehydrogenases in RC and native forest soils, indicating higher metabolic activity in these soils. These findings underscore the importance of soil management strategies to enhance soil productivity, diversity, and overall soil health. Molecular tools are useful to demonstrate how changes in agricultural practices directly influence the microbial community, affecting soil health.}, }
@article {pmid39516921, year = {2024}, author = {Cheng, L and Tao, J and Lu, P and Liang, T and Li, X and Chang, D and Su, H and He, W and Qu, Z and Li, H and Mu, W and Zhang, W and Liu, N and Zhang, J and Cao, P and Jin, J}, title = {Manipulation in root-associated microbiome via carbon nanosol for plant growth improvements.}, journal = {Journal of nanobiotechnology}, volume = {22}, number = {1}, pages = {685}, pmid = {39516921}, issn = {1477-3155}, mesh = {*Microbiota/drug effects ; *Plant Roots/microbiology ; *Carbon/metabolism/chemistry ; *Soil Microbiology ; *Bacteria/metabolism ; *Rhizosphere ; *Plant Development/drug effects ; *Fungi ; Nicotiana/microbiology ; Soil/chemistry ; Nanostructures/chemistry ; Biomass ; }, abstract = {BACKGROUND: Modulating the microbiome with nanomaterials has been proposed to improve plant growth, and reduce reliance on external inputs. Carbon Nanosol (CNS) was attracted for its potential to improve plant productivity. However, the mechanism between CNS and rhizosphere microorganisms remained largely elusive.<br><br>RESULTS: Here, we tried to systematically explore the effects of CNS (600 and 1200&#xa0;mg/L by concentration) on tobacco growth, soil physical properties, and root-associated microbiome. The influence of CNS on soil physicochemical properties and plant growth was significant and dose-dependent, leading to a 28.82% increase in biomass accumulation by 600&#xa0;mg/L CNS. Comparison between the CNS-treated and control plants revealed significant differences in microbiome composition, including 1148 distinct ASVs (923 bacteria and 225 fungi), microbiome interactions, and metabolic function of root-associated microbiomes. Fungal and bacterial communities had different response patterns for CNS treatment, with phased and dose-dependent effects, with the most significant changes in microbial community structure observed at 1200&#xa0;mg/L after 10&#xa0;days of treatment. Microbial networks of CNS-treated plants had more nodes and edges, higher connectivity, and more hub microorganisms than those of control plants. Compared with control, CNS significantly elevated abundances of various bacterial biomarkers (such as Sphingomonas and Burkholderia) and fungi biomarkers (including Penicillium, Myceliophthora, and Talaromyces), which were potential plant-beneficial organisms. Functional prediction based on metagenomic data demonstrated pathways related to nutrient cycling being greatly enriched under CNS treatment. Furthermore, 391 culturable bacteria and 44 culturable fungi were isolated from soil and root samples. Among them, six bacteria and two fungi strains enriched upon CNS treatment were validated to have plant growth promotion effect, and two fungi (Cladosporium spp. and Talaromyces spp.) played their roles by mediating volatile organic compounds (VOCs). To some extent, the driving and shaping of the microbiome by CNS contributed to its impact on plant growth and development.<br><br>CONCLUSION: Our results revealed the key role of root-associated microbiota in mediating the interaction between CNS and plants, thus providing valuable insights and strategies for harnessing CNS to enhance plant growth.}, }
@article {pmid39516585, year = {2024}, author = {Karlsson, ME and Forsberg, G and Rosberg, AK and Thaning, C and Alsanius, B}, title = {Impact of thermal seed treatment on spermosphere microbiome, metabolome and viability of winter wheat.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {27197}, pmid = {39516585}, issn = {2045-2322}, mesh = {*Triticum/microbiology/metabolism ; *Seeds/microbiology/metabolism ; *Microbiota ; *Metabolome ; Seedlings/microbiology/metabolism/growth &amp; development ; Fusarium ; Hot Temperature ; }, abstract = {Thermal seed treatment can be used as an alternative method to prevent infection by seed-borne diseases, but exposure duration and temperature during thermal treatment are important to maintain high seed viability and emergence whilst decreasing infection rate. A method for predicting suitable treatment parameters to maintain viability and eliminate seed-borne pathogens is therefore needed. Seeds of winter wheat were subjected to thermal treatment at four levels of intensity and pre-treatments with or without imbibition. Treatment impact was measured by metabolome analysis using LC-MS and GC-MS, analysis of spermosphere bacterial and fungal metagenomes using Illumina MiSeq, and detection of presence of Fusarium spp. and Microdochium spp. using ddPCR. The results showed that moderate treatment intensity reduced signs of infection and increased seedling emergence. In imbibed samples, myo-inositol concentration and myo-inositol: glucose ratio were positively correlated with treatment intensity, whereas concentrations of glucose and citric acid were negatively correlated. No correlations were found for non-imbibed samples. Imbibition had a large significant impact on microbial community composition of the wheat spermosphere. Imbibition of wheat seeds prior to thermal treatment altered wheat spermosphere microbiota. The concentration of myo-inositol, potentially in combination with glucose, could be a candidate predictor for suitable thermal treatment intensity of wheat seeds.}, }
@article {pmid39515382, year = {2024}, author = {Shan, E and Zhang, X and Yu, Z and Hou, C and Pang, L and Guo, S and Liu, Y and Dong, Z and Zhao, J and Wang, Q and Yuan, X}, title = {Seawater warming rather than acidification profoundly affects coastal geochemical cycling mediated by marine microbiome.}, journal = {The Science of the total environment}, volume = {957}, number = {}, pages = {177365}, doi = {10.1016/j.scitotenv.2024.177365}, pmid = {39515382}, issn = {1879-1026}, mesh = {*Seawater/microbiology/chemistry ; *Microbiota ; *Climate Change ; Hydrogen-Ion Concentration ; Global Warming ; Denitrification ; Bacteria ; }, abstract = {The most concerning consequences of climate change include ocean acidification and warming, which can affect microbial communities and thus the biogeochemical cycling they mediate. Therefore, it is urgent to study the impact of ocean acidification and warming on microbial communities. In the current study, metagenomics was utilized to reveal how the structure and function of marine microorganisms respond to ocean warming and acidification. In terms of community structure, Non-metric Multidimensional Scaling analysis visualized the similarity or difference between the control and the warming or acidification treatments, but the inter-group differences were not significant. In terms of gene functionality, warming treatments showed greater effects on microbial communities than acidification. After treatment with warming, the relative abundance of genes associated with denitrification increased, suggesting that ocean nitrogen loss can increase with increased temperature. Conversely, acidification treatments apparently inhibited denitrification. Warming treatment also greatly affected sulfur-related microorganisms, increasing the relative abundance of certain sulfate-reducing prokaryote, and enriched microbial carbon-fixation pathways. These results provide information on the response strategies of coastal microorganisms in the changing marine environments.}, }
@article {pmid39515333, year = {2024}, author = {Li, X and Zhang, J and Ma, D and Fan, X and Zheng, X and Liu, YX}, title = {Exploring protein natural diversity in environmental microbiomes with DeepMetagenome.}, journal = {Cell reports methods}, volume = {4}, number = {11}, pages = {100896}, pmid = {39515333}, issn = {2667-2375}, mesh = {*Microbiota/genetics ; Metagenome/genetics ; Deep Learning ; Metallothionein/genetics/metabolism ; Humans ; Software ; }, abstract = {Protein natural diversity offers a vast sequence space for protein engineering, and deep learning enables its detection from metagenomes/proteomes without prior assumptions. DeepMetagenome, a Python-based method, explores protein diversity through modules for training and analyzing sequence datasets. The deep learning model includes Embedding, Conv1D, LSTM, and Dense layers, with sequence feature analysis for data cleaning. Applied to metallothioneins from a database of over 146 million coding features, DeepMetagenome identified over 500 high-confidence metallothionein sequences, outperforming DIAMOND and CNN-based models. It showed stable performance compared to a Transformer-based model over 25 epochs. Among 23 synthesized sequences, 20 exhibited metal resistance. The tool also successfully explored the diversity of three additional protein families and is freely available on GitHub with detailed instructions.}, }
@article {pmid39515321, year = {2025}, author = {Lin, Y and Xie, M and Lau, HC and Zeng, R and Zhang, R and Wang, L and Li, Q and Wang, Y and Chen, D and Jiang, L and Damsky, W and Yu, J}, title = {Effects of gut microbiota on immune checkpoint inhibitors in multi-cancer and as microbial biomarkers for predicting therapeutic response.}, journal = {Med (New York, N.Y.)}, volume = {6}, number = {3}, pages = {100530}, doi = {10.1016/j.medj.2024.10.007}, pmid = {39515321}, issn = {2666-6340}, mesh = {*Gastrointestinal Microbiome/immunology/drug effects ; *Immune Checkpoint Inhibitors/therapeutic use/pharmacology ; Humans ; Animals ; Mice ; *Neoplasms/drug therapy/microbiology ; Feces/microbiology ; Biomarkers, Tumor ; }, abstract = {BACKGROUND: Gut bacteria are related to immune checkpoint inhibitors (ICIs). However, there is inconsistency in ICI-associated species, while the role of non-bacterial microbes in immunotherapy remains elusive. Here, we evaluated the association of trans-kingdom microbes with ICIs by multi-cohort multi-cancer analyses.<br><br>METHODS: We retrieved fecal metagenomes from 1,359 ICI recipients with four different cancers (metastatic melanoma [MM], non-small cell lung carcinoma [NSCLC], renal cell cancer [RCC], and hepatocellular carcinoma) from 12 published datasets. Microbiota composition was analyzed using the Wilcoxon rank test. The performance of microbial biomarkers in predicting ICI response was assessed by random forest. Key responder-associated microbes were functionally examined in&#xa0;vitro and in mice.<br><br>FINDINGS: Trans-kingdom gut microbiota (bacteria, eukaryotes, viruses, and archaea) was significantly different between ICI responders and non-responders in multi-cancer. Bacteria (Faecalibacterium prausnitzii, Coprococcus comes) and eukaryotes (Nemania serpens, Hyphopichia pseudoburtonii) were consistently enriched in responders of &#x2265;2 cancer types or from &#x2265;3 cohorts, contrasting with the depleted bacterium Hungatella hathewayi. Responder-associated species in each cancer were revealed, such as F.&#xa0;prausnitzii in MM and 6 species in NSCLC. These signature species influenced ICI efficacy by modulating CD8[+] T&#xa0;cell activity in&#xa0;vitro and in mice. Moreover, bacterial and eukaryotic biomarkers showed great performance in predicting ICI response in patients from discovery and two validation cohorts (MM: area under the receiver operating characteristic curve [AUROC]&#xa0;= 72.27%-80.19%; NSCLC: AUROC&#xa0;= 72.70%-87.98%; RCC: AUROC&#xa0;= 83.33%-89.58%).<br><br>CONCLUSIONS: This study identified trans-kingdom microbial signatures associated with ICI in multi-cancer and specific cancer types. Trans-kingdom microbial biomarkers are potential predictors of ICI response in patients with cancer.<br><br>FUNDING: Funding information is shown in the acknowledgments.}, }
@article {pmid39515242, year = {2025}, author = {Wang, Y and Chen, S and Chen, Y and Xu, J and Zhou, J and He, Q and Lin, Z and Xu, KQ and Fan, G}, title = {Structure-activity relationship between crystal plane and pyrite-driven autotrophic denitrification efficacy: Electron transfer and metagenome-based microbial mechanism.}, journal = {Water research}, volume = {268}, number = {Pt B}, pages = {122756}, doi = {10.1016/j.watres.2024.122756}, pmid = {39515242}, issn = {1879-2448}, mesh = {*Denitrification ; Structure-Activity Relationship ; *Sulfides/chemistry/metabolism ; Nitrates/metabolism ; Water Purification ; *Electron Transport/genetics ; *Metagenome/genetics ; Bacteria/enzymology/genetics ; *Iron/chemistry/metabolism ; Electrochemistry ; Oxidation-Reduction ; *Microbiota ; }, abstract = {Pyrite-driven autotrophic denitrification (PAD) has been recognized as a promising treatment technology for nitrate removal. Although the occurrence of PAD has been found in recent years, there is a knowledge gap about effects of crystal plane of pyrite on the performance and mechanism of PAD system. Here, this study investigated the effects of crystal planes ({100}, {111} and {210}) of single-crystal pyrite on denitrification performance, electron transfer, and microbial mechanism in PAD system. The removal efficiency of nitrate in B-{210} reached 100%, which was 1.67-fold and 2.86-fold higher than that of B-{100} and B-{111}, respectively. X-ray photoelectron spectroscopy and electrochemical results indicated that Fe-S bonds of pyrite with {210} crystal plane were more susceptible to breakage by Fe[3+] oxidation assault, and leaching microbially available Fe[2+] and sulfur intermediates to drive autotrophic denitrification. Metagenomic results suggested that community of functional pyrite-driven denitrifiers varied in response to crystal plane, and abundances of N-S transformation and EET-related microbes and genes in B-{210} notably up-regulated compared to B-{100} and B-{111}. In addition, this work proposed a dual-mode for electron transfer pathway during pyrite oxidation and nitrogen transformation in PAD system. In B-{210}, Fe(II)- and sulfur-driven denitrifiers obtained electron after pyrite oxidation-dissolution, and the enrichment of pyrite-oxidizing bacteria in B-{210} could enhance the electron transfer from pyrite through electron shuttles. This work highlighted that stronger surface reactivity and electron shuttle effect in B-{210} enhanced electron transfer, leading to favorable PAD performance in B-{210}. Overall, this study provides novel insights into the structure-activity relationship between the crystal plane structure of pyrite and denitrification activity in PAD system.}, }
@article {pmid39515198, year = {2024}, author = {De Jaeghere, EA and Hamerlinck, H and Tuyaerts, S and Lippens, L and Van Nuffel, AMT and Baiden-Amissah, R and Vuylsteke, P and Henry, S and Trinh, XB and van Dam, PA and Aspeslagh, S and De Caluwé, A and Naert, E and Lambrechts, D and Hendrix, A and De Wever, O and Van de Vijver, KK and Amant, F and Vandecasteele, K and Verhasselt, B and Denys, HG}, title = {Associations of the gut microbiome with outcomes in cervical and endometrial cancer patients treated with pembrolizumab: Insights from the phase II PRIMMO trial.}, journal = {Gynecologic oncology}, volume = {191}, number = {}, pages = {275-286}, doi = {10.1016/j.ygyno.2024.10.020}, pmid = {39515198}, issn = {1095-6859}, mesh = {Humans ; Female ; *Antibodies, Monoclonal, Humanized/adverse effects/therapeutic use/administration &amp; dosage ; *Gastrointestinal Microbiome/drug effects ; Middle Aged ; *Uterine Cervical Neoplasms/drug therapy/microbiology/pathology ; *Endometrial Neoplasms/drug therapy/microbiology/pathology ; *Antineoplastic Agents, Immunological/adverse effects/therapeutic use ; Aged ; Adult ; Feces/microbiology ; }, abstract = {BACKGROUND: The phase II PRIMMO trial investigated a pembrolizumab-based regimen in patients with recurrent and/or metastatic cervical (CC) or endometrial (EC) carcinoma who had at least one prior line of systemic therapy. Here, exploratory studies of the gut microbiome (GM) are presented.<br><br>METHODS: The microbial composition of 77 longitudinal fecal samples obtained from 35 patients (CC, n&#xa0;=&#xa0;15; EC, n&#xa0;=&#xa0;20) was characterized using 16S rRNA gene sequencing. Analyses included assessment of alpha (Shannon index) and beta diversity (weighted UniFrac), unbiased hierarchical clustering, and linear discriminant analysis effect size. Correlative studies with demographics, disease characteristics, safety, efficacy, and immune monitoring data were performed.<br><br>RESULTS: Significant enrichment in multiple bacterial taxa was associated with the occurrence or resistance to severe treatment-related adverse events (overall or gastrointestinal toxicity specifically). Consistent differences in GM taxonomic composition before pembrolizumab initiation were observed between patients with favorable efficacy (e.g., enriched with Blautia genus) and those with poor efficacy (e.g., enriched with Enterobacteriaceae family and its higher-level taxa up to the phylum level, as well as Clostridium genus and its Clostridiaceae family). Two naturally occurring GM clusters with distinct bacterial compositions were identified. These clusters showed a more than four-fold differential risk for death (hazard ratio, 4.4 [95&#xa0;% confidence interval, 1.9 to 10.3], P&#xa0;<&#xa0;0.001) and were associated with interesting (but non-significant) trends in peripheral immune monitoring data.<br><br>CONCLUSION: Although exploratory, this study offers initial insights into the intricate interplay between the GM and clinical outcomes in patients with CC and EC treated with a pembrolizumab-based regimen.<br><br>TRIAL REGISTRATION: ClinicalTrials.gov (identifier NCT03192059) and EudraCT Registry (number 2016-001569-97).}, }
@article {pmid39513860, year = {2024}, author = {Stupak, A and Kwiatek, M and Gęca, T and Kwaśniewska, A and Mlak, R and Nawrot, R and Goździcka-Józefiak, A and Kwaśniewski, W}, title = {A Virome and Proteomic Analysis of Placental Microbiota in Pregnancies with and without Fetal Growth Restriction.}, journal = {Cells}, volume = {13}, number = {21}, pages = {}, pmid = {39513860}, issn = {2073-4409}, support = {DS 128//Medical University of Lublin/ ; }, mesh = {Humans ; Female ; *Fetal Growth Retardation/virology/metabolism/microbiology ; Pregnancy ; *Proteomics/methods ; *Placenta/virology/metabolism/microbiology ; *Virome ; Adult ; Microbiota ; Proteome/metabolism ; Viral Proteins/metabolism ; Case-Control Studies ; }, abstract = {INTRODUCTION: Metagenomic research has allowed the identification of numerous viruses present in the human body. Viruses may significantly increase the likelihood of developing intrauterine fetal growth restriction (FGR). The goal of this study was to examine and compare the virome of normal and FGR placentas using proteomic techniques.<br><br>METHODS: The study group of 18 women with late FGR was compared with 18 control patients with physiological pregnancy and eutrophic fetus. Proteins from the collected afterbirth placentas were isolated and examined using liquid chromatography linked to a mass spectrometer.<br><br>RESULTS: In this study, a group of 107 viral proteins were detected compared to 346 in the controls. In total, 41 proteins were common in both groups. In total, 64 proteins occurred only in the study group and indicated the presence of bacterial phages: E. coli, Bacillus, Mediterranenean, Edwardsiella, Propionibacterium, Salmonella, Paenibaciilus and amoebae Mimiviridae, Acanthamoeba polyphaga, Mimivivirus, Pandoravirdae, Miroviridae, Pepper plant virus golden mosaic virus, pol proteins of HIV-1 virus, and proteins of Pandoravirdae, Microviridae, and heat shock proteins of the virus Faustoviridae. Out of 297 proteins found only in the control group, only 2 viral proteins occurred statistically significantly more frequently: 1/hypothetical protein [uncultured Mediterranean phage uvMED] and VP4 [Gokushovirus WZ-2015a].<br><br>DISCUSSION: The detection of certain viral proteins exclusively in the control group suggests that they may play a protective role. Likewise, the proteins identified only in the study group could indicate a potentially pathogenic function. A virome study may be used to identify an early infection, evaluate its progress, and possible association with fetal growth restriction. Utilizing this technology, an individualized patient therapy is forthcoming, e.g., vaccines.}, }
@article {pmid39513726, year = {2024}, author = {Zou, L and Zhang, Z and Chen, J and Guo, R and Tong, X and Ju, Y and Lu, H and Yang, H and Wang, J and Zong, Y and Xu, X and Jin, X and Xiao, L and Jia, H and Zhang, T and Liu, X}, title = {Unraveling the impact of host genetics and factors on the urinary microbiome in a young population.}, journal = {mBio}, volume = {15}, number = {12}, pages = {e0277324}, pmid = {39513726}, issn = {2150-7511}, mesh = {Humans ; Female ; *Microbiota/genetics ; Male ; Adult ; *Bacteria/genetics/classification/isolation &amp; purification ; Young Adult ; Metagenomics ; China ; Host Microbial Interactions/genetics ; Urinary Tract/microbiology ; Whole Genome Sequencing ; Urine/microbiology ; Cohort Studies ; Adolescent ; }, abstract = {UNLABELLED: The significance of the urinary microbiome in maintaining health and contributing to disease development is increasingly recognized. However, a comprehensive understanding of this microbiome and its influencing factors remains elusive. Utilizing whole metagenomic and whole-genome sequencing, along with detailed metadata, we characterized the urinary microbiome and its influencing factors in a cohort of 1,579 Chinese individuals. Our findings unveil the distinctiveness of the urinary microbiome from other four body sites, delineating five unique urotypes dominated by Gardnerella vaginalis, Sphingobium fluviale, Lactobacillus iners, Variovorax sp. PDC80, and Acinetobacter junii, respectively. We identified 108 host factors significantly influencing the urinary microbiome, collectively explaining 12.92% of the variance in microbial composition. Notably, gender-related factors, including sex hormones, emerged as key determinants in defining urotype groups, microbial composition and pathways, with the urinary microbiome exhibiting strong predictive ability for gender (area under the curve [AUC] = 0.843). Furthermore, we discovered 43 genome-wide significant associations between host genetic loci and specific urinary bacteria, Acinetobacter in particular, linked to eight host loci (P < 5 × 10[-8]). These associations were also modulated by gender and sex hormone levels. In summary, our study provides novel insights into the impact of host genetics and other factors on the urinary microbiome, shedding light on its implications for host health and disease.<br><br>IMPORTANCE: The urinary microbiome, essential to human health, reveals its unique qualities in our study of 1,579 Chinese individuals. We identified distinctive microbial profiles, or "urotypes," and uncovered strong gender-related influences, particularly from sex hormones, on these microbial communities. Our research highlights significant genetic associations affecting specific urinary bacteria, indicating a deep interaction between our genetics and our microbiome. These insights not only enhance our understanding of the urinary microbiome's role in health and disease but also open new pathways for personalized medical strategies, making our findings crucial for future diagnostic and therapeutic innovations. This work underscores the intricate relationship between our body's biological processes and the microorganisms within, providing valuable knowledge for both scientific and medical communities.}, }
@article {pmid39511594, year = {2024}, author = {Gui, L and Zuo, X and Feng, J and Wang, M and Chen, Z and Sun, Y and Qi, J and Chen, Z and Pathak, JL and Zhang, Y and Cui, C and Zhang, P and Guo, X and Lv, Q and Zhang, X and Zhang, Y and Gu, J and Lin, Z}, title = {Outgrowth of Escherichia is susceptible to aggravation of systemic lupus erythematosus.}, journal = {Arthritis research &amp; therapy}, volume = {26}, number = {1}, pages = {191}, pmid = {39511594}, issn = {1478-6362}, support = {2024A1515010590//Natural Science Foundation of Guangdong Province, China/ ; JCYJ20220530154601004//Shenzhen Science and Technology Innovation Bureau/ ; 2020B1111170008//Guangdong Clinical Research Center of Immune disease/ ; SW201901//Ten &amp; Five Project of the Third Affiliated Hospital of Sun Yat-Sen University/ ; A2675//Distinguished Young Scholar Candidates Program for The Third Affiliated Hospital of Sun Yat-Sen University/ ; }, mesh = {*Lupus Erythematosus, Systemic/microbiology/immunology/metabolism ; *Gastrointestinal Microbiome/physiology/immunology ; Animals ; Humans ; Female ; Mice ; *Mice, Inbred MRL lpr ; Adult ; *Feces/microbiology ; Male ; Dysbiosis/immunology/microbiology ; Middle Aged ; Escherichia coli/genetics/immunology ; Metagenomics/methods ; }, abstract = {BACKGROUND: Systemic lupus erythematosus (SLE) is linked to host gut dysbiosis. Here we performed faecal gut microbiome sequencing to investigate SLE-pathogenic gut microbes and their potential mechanisms.<br><br>METHODS: There were 134 healthy controls (HCs) and 114 SLE cases for 16&#xa0;S ribosomal RNA (rRNA) sequencing and 97 HCs and 124 SLE cases for shotgun metagenomics. Faecal microbial changes and associations with clinical phenotypes were evaluated, and SLE-associated microbial genera were identified in amplicon analysis. Next, metagenomic sequencing was applied for accurate identification of microbial species and discovery of their metabolic pathways and immunogenic peptides both relevant to SLE. Finally, contribution of specific taxa to disease development was confirmed by oral gavage into lupus-prone MRL/lpr mice.<br><br>RESULTS: SLE patients had gut microbiota richness reduction and composition alteration, particularly lupus nephritis and active patients. Proteobacteria/Bacteroidetes (P/B) ratio was remarkably up-regulated, and Escherichia was identified as the dominantly expanded genus in SLE, followed by metagenomics accurately located Escherichia coli and Escherichia unclassified species. Significant associations primarily appeared among Escherichia coli, metabolic pathways of purine nucleotide salvage or peptidoglycan maturation and SLE disease activity index (SLEDAI), and between multiple epitopes from Escherichia coli and disease activity or renal involvement phenotype. Finally, gavage with faecal Escherichia revealed that it upregulated lupus-associated serum traits and aggravated glomerular lesions in MRL/lpr mice.<br><br>CONCLUSION: We characterize a novel SLE exacerbating Escherichia outgrowth and suggest its contribution to SLE procession may be partially associated with metabolite changes and cross-reactivity of gut microbiota-associated epitopes and host autoantigens. The findings could provide a deeper insight into gut Escherichia in the procession of SLE.}, }
@article {pmid39510376, year = {2025}, author = {Huang, Y and You, Y and Wang, W and Chen, YH and Zhang, H and Li, QP and Liu, L and Tong, K and Sun, N and Hao, JR and Gao, C}, title = {Adenosine regulates depressive behavior in mice with chronic social defeat stress through gut microbiota.}, journal = {Neuropharmacology}, volume = {262}, number = {}, pages = {110209}, doi = {10.1016/j.neuropharm.2024.110209}, pmid = {39510376}, issn = {1873-7064}, mesh = {Animals ; *Gastrointestinal Microbiome/physiology/drug effects ; *Adenosine/metabolism ; Male ; Mice ; *Stress, Psychological/metabolism ; *Fecal Microbiota Transplantation ; *Social Defeat ; *Depression/therapy/metabolism ; Dysbiosis ; Humans ; Mice, Inbred C57BL ; Depressive Disorder, Major/metabolism/therapy ; Probiotics/administration &amp; dosage/pharmacology ; Female ; }, abstract = {Major depressive disorder (MDD) is recognized as the most prevalent affective disorder worldwide. Metagenomic studies increasingly support a critical role for dysbiosis of gut microbiota in the development of depression. Previous studies have demonstrated that adenosine alleviates gut dysbiosis, suggesting that elevating adenosine levels could be a novel intervention for MDD; however, the mechanisms underlying this effect remain unclear. This study utilized 16S rRNA gene sequencing, fecal microbiota transplantation (FMT) and ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) to test the hypothesis that increased adenosine alleviates depressive behaviors in male mice subjected to chronic social defeat stress (CSDS) through alterations to gut microbiota. The data showed that depression-susceptible (SUS) mice exhibited gut dysbiosis, and FMT from SUS mice increased depression-like behaviors in healthy recipients. In SUS mice, adenosine supplementation ameliorated both depression-like behaviors and abnormalities in gut microbiota, and co-administration of probiotics and adenosine not only mitigated depression-like behaviors but also enhanced gut barrier integrity. By including 83 depressed adolescents and 67 healthy controls, this study found that the level of short-chain fatty acids (SCFAs) in the depression group was reduced, this finding parallels reductions seen in SUS mice and in recipient mice after FMT from SUS donors. Conversely, supplementation with either adenosine or probiotics led increased SCFAs concentrations in the serum of SUS mice. These findings suggest that adenosine may alleviate depression-like behaviors in CSDS mice by modulating the gut microbiota. This effect is likely associated with increased serum SCFAs, metabolites produced by the gut microbiota, following adenosine supplementation. This article is part of the Special Issue on "Personality Disorders".}, }
@article {pmid39510362, year = {2024}, author = {Deng, YP and Yao, C and Fu, YT and Zhuo, Y and Zou, JL and Pan, HY and Peng, YY and Liu, GH}, title = {Analyses of the gut microbial composition of domestic pig louse Haematopinus suis.}, journal = {Microbial pathogenesis}, volume = {197}, number = {}, pages = {107106}, doi = {10.1016/j.micpath.2024.107106}, pmid = {39510362}, issn = {1096-1208}, mesh = {Animals ; Swine ; *Gastrointestinal Microbiome/genetics ; *Bacteria/classification/genetics/isolation &amp; purification ; Symbiosis ; Phylogeny ; Swine Diseases/microbiology/parasitology ; Metagenomics ; Computational Biology ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Haematopinus suis is an obligatory ectoparasite of the domestic pig, serving as a vector of several swine pathogens and posing great threats to the pig industry. The gut microbiome of lice is thought of an important mediator of their healthy physiology. However, there is a great paucity of lice-associated microbial communities' structure and function. The current study aimed to profile the gut microbiome and to understand the microbial functions of swine lice by metagenomic sequencing and bioinformatics analyses. In total, 102,358 (77.2 %) nonredundant genes were cataloged, by contrast, only a small proportion of genes were assigned to microbial taxa and functional assemblages. Bacteria of known or potential public health significance such as Anaplasma phagocytophilum, Chlamydia trachomatis, Waddlia chondrophila, Bacillus cereus, and Leptotrichia goodfellowii were observed in all samples. The integrated microbial profile further illustrated the evolutionary relevance of endosymbionts and detailed the functional composition, and findings suggested H. suis may acquire adenosylcobalamin by feeding due to an adenosylcobalamin synthesis defect and a lack of complete synthases of endosymbionts. Sucking lice contained fewer functional genes compared with ticks and fleas probably because of the obligate host specificity of parasitic lice. In addition, the genes from the intestines contained encompassed most of the microbial functional genes in sucking lice. A wide range of unknown taxonomic and functional assemblages were discovered, which improves our understanding related to microbial features and physiological activities of sucking lice. In general, this study increases the characterization of the microbiota of lice and offers clues for preventing and controlling lice infestation in swine production in the future.}, }
@article {pmid39509330, year = {2024}, author = {Wang, M and Fontaine, S and Jiang, H and Li, G}, title = {ADAPT: Analysis of Microbiome Differential Abundance by Pooling Tobit Models.}, journal = {Bioinformatics (Oxford, England)}, volume = {40}, number = {11}, pages = {}, pmid = {39509330}, issn = {1367-4811}, support = {R03 DE031296/DE/NIDCR NIH HHS/United States ; R03DE031296/DE/NIDCR NIH HHS/United States ; }, mesh = {*Microbiota ; Humans ; *Metagenomics/methods ; *RNA, Ribosomal, 16S/genetics ; *Saliva/microbiology ; Software ; Infant ; Dental Caries/microbiology ; }, abstract = {MOTIVATION: Microbiome differential abundance analysis (DAA) remains a challenging problem despite multiple methods proposed in the literature. The excessive zeros and compositionality of metagenomics data are two main challenges for DAA.<br><br>RESULTS: We propose a novel method called "Analysis of Microbiome Differential Abundance by Pooling Tobit Models" (ADAPT) to overcome these two challenges. ADAPT interprets zero counts as left-censored observations to avoid unfounded assumptions and complex models. ADAPT also encompasses a theoretically justified way of selecting non-differentially abundant microbiome taxa as a reference to reveal differentially abundant taxa while avoiding false discoveries. We generate synthetic data using independent simulation frameworks to show that ADAPT has more consistent false discovery rate control and higher statistical power than competitors. We use ADAPT to analyze 16S rRNA sequencing of saliva samples and shotgun metagenomics sequencing of plaque samples collected from infants in the COHRA2 study. The results provide novel insights into the association between the oral microbiome and early childhood dental caries.<br><br>The R package ADAPT can be installed from Bioconductor at https://bioconductor.org/packages/release/bioc/html/ADAPT.html or from Github at https://github.com/mkbwang/ADAPT. The source codes for simulation studies and real data analysis are available at https://github.com/mkbwang/ADAPT_example.}, }
@article {pmid39509322, year = {2024}, author = {Rödelsperger, C and Röseler, W and Athanasouli, M and Wighard, S and Herrmann, M and Sommer, RJ}, title = {Genome Assembly of the Nematode Rhabditoides Inermis From a Complex Microbial Community.}, journal = {Genome biology and evolution}, volume = {16}, number = {11}, pages = {}, pmid = {39509322}, issn = {1759-6653}, support = {//Max Planck Society/ ; }, mesh = {Animals ; *Phylogeny ; *Genome, Helminth ; Rhabditoidea/genetics/microbiology ; Microbiota ; }, abstract = {Free-living nematodes such as Caenorhabditis elegans and Pristionchus pacificus are powerful model systems for linking specific traits to their underlying genetic basis. To trace the evolutionary history of specific traits or genes, a robust phylogenomic framework is indispensable. In the context of the nematode family Diplogastridae to which P. pacificus belongs, the identity of a sister group has long been debated. In this work, we generated a pseudochromosome level genome assembly of the nematode Rhabditoides inermis, which has previously been proposed as the sister taxon. The genome was assembled from a complex microbial community that is stably associated with R. inermis isolates and that consists of multiple bacteria and a fungus, which we identified as a strain of Vanrija albida. The R. inermis genome spans 173.5Mb that are largely assembled into five pseudochromosomes. This chromosomal configuration likely arose from two recent fusions of different Nigon elements. Phylogenomic analysis did not support a sister group relationship between R. inermis and diplogastrids, but rather supports a sister group relationship between the monophyletic Diplogastridae and a group of genera of Rhabditidae including C. elegans and R. inermis. Thus, our work addresses for the first time the long lasting question about the sister group to diplogastrids at the phylogenomic level and provides with the genomes of R. inermis and the associated fungus V. albida valuable resources for future genomic comparisons.}, }
@article {pmid39508593, year = {2024}, author = {Tran, TH and F Escapa, I and Roberts, AQ and Gao, W and Obawemimo, AC and Segre, JA and Kong, HH and Conlan, S and Kelly, MS and Lemon, KP}, title = {Metabolic capabilities are highly conserved among human nasal-associated Corynebacterium species in pangenomic analyses.}, journal = {mSystems}, volume = {9}, number = {12}, pages = {e0113224}, pmid = {39508593}, issn = {2379-5077}, support = {//HHS | NIH | National Human Genome Research Institute (NHGRI)/ ; //HHS | NIH | National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)/ ; R35 GM141806/GM/NIGMS NIH HHS/United States ; K23 AI135090/AI/NIAID NIH HHS/United States ; R01 GM117174/GM/NIGMS NIH HHS/United States ; FPILOT45//Forsyth Institute/ ; R35 GM141806, R01 GM117174//HHS | NIH | National Institute of General Medical Sciences (NIGMS)/ ; }, mesh = {*Corynebacterium/genetics/metabolism ; Humans ; *Genome, Bacterial ; *Phylogeny ; Microbiota/genetics ; Genomics ; United States ; Nose/microbiology ; Botswana ; }, abstract = {UNLABELLED: Corynebacterium species are globally ubiquitous in human nasal microbiota across the lifespan. Moreover, nasal microbiota profiles typified by higher relative abundances of Corynebacterium are often positively associated with health. Among the most common human nasal Corynebacterium species are C. propinquum, C. pseudodiphtheriticum, C. accolens, and C. tuberculostearicum. To gain insight into the functions of these four species, we identified genomic, phylogenomic, and pangenomic properties and estimated the metabolic capabilities of 87 distinct human nasal Corynebacterium strain genomes: 31 from Botswana and 56 from the United States. C. pseudodiphtheriticum had geographically distinct clades consistent with localized strain circulation, whereas some strains from the other species had wide geographic distribution spanning Africa and North America. All species had similar genomic and pangenomic structures. Gene clusters assigned to all COG metabolic categories were overrepresented in the persistent versus accessory genome of each species indicating limited strain-level variability in metabolic capacity. Based on prevalence data, at least two Corynebacterium species likely coexist in the nasal microbiota of 82% of adults. So, it was surprising that core metabolic capabilities were highly conserved among the four species indicating limited species-level metabolic variation. Strikingly, strains in the U.S. clade of C. pseudodiphtheriticum lacked genes for assimilatory sulfate reduction present in most of the strains in the Botswana clade and in the other studied species, indicating a recent, geographically related loss of assimilatory sulfate reduction. Overall, the minimal species and strain variability in metabolic capacity implies coexisting strains might have limited ability to occupy distinct metabolic niches.<br><br>IMPORTANCE: Pangenomic analysis with estimation of functional capabilities facilitates our understanding of the full biologic diversity of bacterial species. We performed systematic genomic, phylogenomic, and pangenomic analyses with qualitative estimation of the metabolic capabilities of four common human nasal Corynebacterium species, along with focused experimental validations, generating a foundational resource. The prevalence of each species in human nasal microbiota is consistent with the common coexistence of at least two species. We identified a notably high level of metabolic conservation within and among species indicating limited options for species to occupy distinct metabolic niches, highlighting the importance of investigating interactions among nasal Corynebacterium species. Comparing strains from two continents, C. pseudodiphtheriticum had restricted geographic strain distribution characterized by an evolutionarily recent loss of assimilatory sulfate reduction in U.S. strains. Our findings contribute to understanding the functions of Corynebacterium within human nasal microbiota and to evaluating their potential for future use as biotherapeutics.}, }
@article {pmid39507669, year = {2024}, author = {Buytaers, FE and Berger, N and Van der Heyden, J and Roosens, NHC and De Keersmaecker, SCJ}, title = {The potential of including the microbiome as biomarker in population-based health studies: methods and benefits.}, journal = {Frontiers in public health}, volume = {12}, number = {}, pages = {1467121}, pmid = {39507669}, issn = {2296-2565}, mesh = {Humans ; *Biomarkers/analysis ; *Microbiota ; Population Health ; Health Status ; Public Health ; }, abstract = {The key role of our microbiome in influencing our health status, and its relationship with our environment and lifestyle or health behaviors, have been shown in the last decades. Therefore, the human microbiome has the potential to act as a biomarker or indicator of health or exposure to health risks in the general population, if information on the microbiome can be collected in population-based health surveys or cohorts. It could then be associated with epidemiological participant data such as demographic, clinical or exposure profiles. However, to our knowledge, microbiome sampling has not yet been included as biological evidence of health or exposure to health risks in large population-based studies representative of the general population. In this mini-review, we first highlight some practical considerations for microbiome sampling and analysis that need to be considered in the context of a population study. We then present some examples of topics where the microbiome could be included as biological evidence in population-based health studies for the benefit of public health, and how this could be developed in the future. In doing so, we aim to highlight the benefits of having microbiome data available at the level of the general population, combined with epidemiological data from health surveys, and hence how microbiological data could be used in the future to assess human health. We also stress the challenges that remain to be overcome to allow the use of this microbiome data in order to improve proactive public health policies.}, }
@article {pmid39507397, year = {2024}, author = {Wang, H and Wang, H and Crowther, TW and Isobe, K and Reich, PB and Tateno, R and Shi, W}, title = {Metagenomic insights into inhibition of soil microbial carbon metabolism by phosphorus limitation during vegetation succession.}, journal = {ISME communications}, volume = {4}, number = {1}, pages = {ycae128}, pmid = {39507397}, issn = {2730-6151}, abstract = {There is growing awareness of the need for regenerative practices in the fight against biodiversity loss and climate change. Yet, we lack a mechanistic understanding of how microbial community composition and functioning are likely to change alongside transition from high-density tillage to large-scale vegetation restoration. Here, we investigated the functional dynamics of microbial communities following a complete vegetation successional chronosequence in a subtropical zone, Southwestern China, using shotgun metagenomics approaches. The contents of total soil phosphorus (P), available P, litter P, and microbial biomass P decreased significantly during vegetation succession, indicating that P is the most critical limiting nutrient. The abundance of genes related to P-uptake and transport, inorganic P-solubilization, organic P-mineralization, and P-starvation response regulation significantly increased with successional time, indicating an increased microbial "mining" for P under P limitation. Multi-analysis demonstrated microbial P limitation strongly inhibits carbon (C) catabolism potential, resulting in a significant decrease in carbohydrate-active enzyme family gene abundances. Nevertheless, over successional time, microorganisms increased investment in genes involved in degradation-resistant compounds (lignin and its aromatic compounds) to acquire P resources in the litter. Our study provides functional gene-level insights into how P limitation during vegetation succession in subtropical regions inhibits soil microbial C metabolic processes, thereby advancing our understanding of belowground C cycling and microbial metabolic feedback during forest restoration.}, }
@article {pmid39507337, year = {2024}, author = {Rizzo, C and Dastager, SG and Ay, H}, title = {Editorial: Microbial biodiversity and bioprospecting in polar ecosystems in the genomics era.}, journal = {Frontiers in microbiology}, volume = {15}, number = {}, pages = {1504105}, pmid = {39507337}, issn = {1664-302X}, }
@article {pmid39508239, year = {2024}, author = {Dames, NR and Rocke, E and Pitcher, G and Rybicki, E and Pfaff, M and Moloney, CL}, title = {Ecological roles of nano-picoplankton in stratified waters of an embayment in the southern Benguela.}, journal = {FEMS microbiology letters}, volume = {371}, number = {}, pages = {}, pmid = {39508239}, issn = {1574-6968}, support = {116142//National Research Foundation/ ; }, mesh = {South Africa ; *Archaea/classification/metabolism/isolation &amp; purification/genetics ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; Plankton/classification ; Microbiota ; Seawater/microbiology/chemistry ; Bays/microbiology ; Ecosystem ; Eukaryota/classification/physiology ; }, abstract = {Nano-picoplankton are the dominant primary producers during the postupwelling period in St Helena Bay, South Africa. Their dynamics on short timescales are not well-understood and neither are the community composition, structure, and potential functionality of the surrounding microbiome. Samples were collected over five consecutive days in March 2018 from three depths (1, 25, and 50 m) at a single sampling station in St Helena Bay. There was clear depth-differentiation between the surface and depth in both diversity and function throughout the sampling period for the archaea, bacteria, and eukaryotes. Daily difference in eukaryote diversity, was more pronounced at 1 and 25 m with increased abundances of Syndiniales and Bacillariophyta. Surface waters were dominated by photosynthetic and photoheterotrophic microorganisms, while samples at depth were linked to nitrogen cycling processes, with high abundances of nitrifiers and denitrifiers. Strong depth gradients found in the nutrient transporters for ammonia were good indicators of measured uptake rates. This study showed that nano-picoplankton dynamics were driven by light availability, nutrient concentrations, carbon biomass, and oxygenation. The nano-picoplankton help sustain ecosystem functioning in St Helena Bay through their ecological roles, which emphasizes the need to monitor this size fraction of the plankton.}, }
@article {pmid39506101, year = {2024}, author = {Beránková, T and Arora, J and Romero Arias, J and Buček, A and Tokuda, G and Šobotník, J and Hellemans, S and Bourguignon, T}, title = {Termites and subsocial roaches inherited many bacterial-borne carbohydrate-active enzymes (CAZymes) from their common ancestor.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1449}, pmid = {39506101}, issn = {2399-3642}, mesh = {*Isoptera/microbiology/enzymology ; Animals ; *Bacteria/enzymology/genetics ; *Phylogeny ; Gastrointestinal Microbiome ; Cockroaches/microbiology/enzymology ; Metagenome ; Evolution, Molecular ; Bacterial Proteins/metabolism/genetics ; Carbohydrate Metabolism ; }, abstract = {Termites digest wood using Carbohydrate-Active Enzymes (CAZymes) produced by gut bacteria with whom they have cospeciated at geological timescales. Whether CAZymes were encoded in the genomes of their ancestor's gut bacteria and transmitted to modern termites or acquired more recently from bacteria not associated with termites is unclear. We used gut metagenomes from 195 termites and one Cryptocercus, the sister group of termites, to investigate the evolution of termite gut bacterial CAZymes. We found 420 termite-specific clusters in 81 bacterial CAZyme gene trees, including 404 clusters showing strong cophylogenetic patterns with termites. Of the 420 clusters, 131 included at least one bacterial CAZyme sequence associated with Cryptocercus or Mastotermes, the sister group of all other termites. Our results suggest many bacterial CAZymes have been encoded in the genomes of termite gut bacteria since termite origin, indicating termites rely upon many bacterial CAZymes endemic to their guts to digest wood.}, }
@article {pmid39505993, year = {2024}, author = {Gulyás, G and Kakuk, B and Dörmő, &#xc1; and Járay, T and Prazsák, I and Csabai, Z and Henkrich, MM and Boldogkői, Z and Tombácz, D}, title = {Cross-comparison of gut metagenomic profiling strategies.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1445}, pmid = {39505993}, issn = {2399-3642}, support = {LP2020-8/2020//Magyar Tudom&#xe1;nyos Akad&#xe9;mia (Hungarian Academy of Sciences)/ ; FK 142676//Nemzeti Kutat&#xe1;si, Fejleszt&#xe9;si &#xe9;s Innov&#xe1;ci&#xf3;s Hivatal (NKFI Office)/ ; }, mesh = {*Metagenomics/methods ; Animals ; *Gastrointestinal Microbiome/genetics ; Dogs ; *Feces/microbiology ; Computational Biology/methods ; Software ; Sequence Analysis, DNA/methods ; High-Throughput Nucleotide Sequencing/methods ; Metagenome ; Gene Library ; }, abstract = {The rapid advancements in sequencing technologies and bioinformatics have enabled metagenomic research of complex microbial systems, but reliable results depend on consistent laboratory and bioinformatics approaches. Current efforts to identify best practices often focus on optimizing specific steps, making it challenging to understand the influence of each stage on microbial population analysis and compare data across studies. This study evaluated DNA extraction, library construction methodologies, sequencing platforms, and computational approaches using a dog stool sample, two synthetic microbial community mixtures, and various sequencing data sources. Our work, the most comprehensive evaluation of metagenomic methods to date. We developed a software tool, termed minitax, which provides consistent results across the range of platforms and methodologies. Our findings showed that the Zymo Research Quick-DNA HMW MagBead Kit, Illumina DNA Prep library preparation method, and the minitax bioinformatics tool were the most effective for high-quality microbial diversity analysis. However, the effectiveness of pipelines or method combinations is sample-specific, making it difficult to identify a universally optimal approach. Therefore, employing multiple approaches is crucial for obtaining reliable outcomes in microbial systems.}, }
@article {pmid39505912, year = {2024}, author = {Mi, J and Jing, X and Ma, C and Shi, F and Cao, Z and Yang, X and Yang, Y and Kakade, A and Wang, W and Long, R}, title = {A metagenomic catalogue of the ruminant gut archaeome.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {9609}, pmid = {39505912}, issn = {2041-1723}, mesh = {Animals ; *Ruminants/microbiology ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; *Archaea/genetics/classification ; *Genome, Archaeal ; *Metagenome ; Methane/metabolism ; Phylogeny ; Gastrointestinal Tract/microbiology ; }, abstract = {While the ruminant gut archaeome regulates the gut microbiota and hydrogen balance, it is also a major producer of the greenhouse gas methane. However, ruminant gut archaeome diversity within the gastrointestinal tract (GIT) of ruminant animals worldwide remains largely underexplored. Here, we construct a catalogue of 998 unique archaeal genomes recovered from the GITs of ruminants, utilizing 2270 metagenomic samples across 10 different ruminant species. Most of the archaeal genomes (669/998 = 67.03%) belong to Methanobacteriaceae and Methanomethylophilaceae (198/998 = 19.84%). We recover 47/279 previously undescribed archaeal genomes at the strain level with completeness of >80% and contamination of <5%. We also investigate the archaeal gut biogeography across various ruminants and demonstrate that archaeal compositional similarities vary significantly by breed and gut location. The catalogue contains 42,691 protein clusters, and the clustering and methanogenic pathway analysis reveal strain- and host-specific dependencies among ruminant animals. We also find that archaea potentially carry antibiotic and metal resistance genes, mobile genetic elements, virulence factors, quorum sensors, and complex archaeal viromes. Overall, this catalogue is a substantial repository for ruminant archaeal recourses, providing potential for advancing our understanding of archaeal ecology and discovering strategies to regulate methane production in ruminants.}, }
@article {pmid39505908, year = {2024}, author = {Xu, B and Song, P and Jiang, F and Cai, Z and Gu, H and Gao, H and Li, B and Liang, C and Qin, W and Zhang, J and Yan, J and Liu, D and Sun, G and Zhang, T}, title = {Large-scale metagenomic assembly provide new insights into the genetic evolution of gut microbiomes in plateau ungulates.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {120}, pmid = {39505908}, issn = {2055-5008}, support = {U20A2012//National Natural Science Foundation of China (National Science Foundation of China)/ ; 2023M743743//China Postdoctoral Science Foundation/ ; }, mesh = {*Gastrointestinal Microbiome ; Animals ; *Metagenomics/methods ; *Evolution, Molecular ; China ; *Metagenome ; Bacteria/genetics/classification/isolation &amp; purification ; Phylogeny ; Fatty Acids, Volatile/metabolism ; Genome, Bacterial ; }, abstract = {Trillions of microbes colonize the ungulate gastrointestinal tract, playing a pivotal role in enhancing host nutrient utilization by breaking down cellulose and hemicellulose present in plants. Here, through large-scale metagenomic assembly, we established a catalog of 131,416 metagenome-assembled genomes (MAGs) and 11,175 high-quality species-level genome bins (SGBs) from 17 species of ungulates in China. Our study revealed the convergent evolution of high relative abundances of carbohydrate-active enzymes (CAZymes) in the gut microbiomes of plateau-dwelling ungulates. Notably, two significant factors contribute to this phenotype: structural variations in their gut microbiome genomes, which contain more CAZymes, and the presence of novel gut microbiota species, particularly those in the genus Cryptobacteroides, which are undergoing independent rapid evolution and speciation and have higher gene densities of CAZymes. Furthermore, these enrichment CAZymes in the gut microbiomes are highly enrichment in known metabolic pathways for short-chain fatty acid (SCFA) production. Our findings not only provide a valuable genomic resource for understanding the gut microbiomes of ungulates but also offer fresh insights into the interaction between gut microbiomes and their hosts, as well as the co-adaptation of hosts and their gut microbiomes to their environments.}, }
@article {pmid39505900, year = {2024}, author = {Bontemps, Z and Abrouk, D and Venier, S and Vergne, P and Michalet, S and Comte, G and Moënne-Loccoz, Y and Hugoni, M}, title = {Microbial diversity and secondary metabolism potential in relation to dark alterations in Paleolithic Lascaux Cave.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {121}, pmid = {39505900}, issn = {2055-5008}, mesh = {*Caves/microbiology ; *Secondary Metabolism ; *Metagenomics/methods ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Microbiota ; Biodiversity ; Metagenome ; Melanins/metabolism ; }, abstract = {Tourism in Paleolithic caves can cause an imbalance in cave microbiota and lead to cave wall alterations, such as dark zones. However, the mechanisms driving dark zone formation remain unclear. Using shotgun metagenomics in Lascaux Cave's Apse and Passage across two years, we tested metabarcoding-derived functional hypotheses regarding microbial diversity and metabolic potential in dark zones vs unmarked surfaces nearby. Taxonomic and functional metagenomic profiles were consistent across years but divergent between cave locations. Aromatic compound degradation genes were prevalent inside and outside dark zones, as expected from past biocide usage. Dark zones exhibited enhanced pigment biosynthesis potential (melanin and carotenoids) and melanin was evidenced chemically, while unmarked surfaces showed genes for antimicrobials production, suggesting that antibiosis might restrict the development of pigmented microorganisms and dark zone extension. Thus, this work revealed key functional microbial traits associated with dark zone formation, which helps understand cave alteration processes under severe anthropization.}, }
@article {pmid39505046, year = {2024}, author = {Liu, Y and Wang, Y and Shi, W and Wu, N and Liu, W and Francis, F and Wang, X}, title = {Enterobacter-infecting phages in nitrogen-deficient paddy soil impact nitrogen-fixation capacity and rice growth by shaping the soil microbiome.}, journal = {The Science of the total environment}, volume = {956}, number = {}, pages = {177382}, doi = {10.1016/j.scitotenv.2024.177382}, pmid = {39505046}, issn = {1879-1026}, mesh = {*Oryza/virology/microbiology ; *Soil Microbiology ; *Enterobacter/virology/physiology ; *Microbiota/physiology ; *Bacteriophages/physiology ; *Soil/chemistry ; *Nitrogen Fixation ; *Nitrogen ; Phylogeny ; }, abstract = {Bacteriophages ("phage") play important roles in nutrient cycling and ecology in environments by regulating soil microbial community structure. Here, metagenomic sequencing showed that a low relative abundance of nitrogen-fixing bacteria but high abundance of Enterobacter-infecting phages in paddy soil where rice plants showed nitrogen deficiency. From soil in the same field, we also isolated and identified a novel virulent phage (named here as Apdecimavirus NJ2) that infects several species of Enterobacter and characterized its impact on nitrogen fixation in the soil and in plants. It has the morphology of the Autographiviridae family, with a dsDNA genome of 39,605 bp, 47 predicted open reading frames and 52.64 % GC content. Based on genomic characteristics, comparative genomics and phylogenetic analysis, Apdecimavirus NJ2 should be a novel species in the genus Apdecimavirus, subfamily Studiervirinae. After natural or sterilized field soil was potted and inoculated with the phage, soil nitrogen-fixation capacity and rice growth were impaired, the abundance of Enterobacter decreased, along with the bacterial community composition and biodiversity changed compared with that of the unadded control paddy soil. Our work provides strong evidence that phages can affect the soil nitrogen cycle by changing the bacterial community. Controlling phages in the soil could be a useful strategy for improving soil nitrogen fixation.}, }
@article {pmid39503478, year = {2024}, author = {Sun, H and Liu, X and Wang, T and Liu, S and Zhang, R and Guo, X and Yu, Z and Zhao, Y and Shen, P and Zhang, Y}, title = {Rhizosphere microbiomes are closely linked to seagrass species: a comparative study of three coastal seagrasses.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {12}, pages = {e0175424}, pmid = {39503478}, issn = {1098-5336}, support = {U2106208//NSFC-Shandong Joint Fund/ ; 41976147//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {*Rhizosphere ; *Microbiota ; *Zosteraceae/microbiology ; China ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Soil Microbiology ; Alismatales/microbiology ; Metagenome ; }, abstract = {UNLABELLED: Seagrass meadows are important marine ecosystems in coastal areas, offering ecological and economic services to the mankind. However, these ecosystems are facing declines due to climate changes and human activities. Rhizosphere-associated microbiomes play critical roles in the survival and adaptation of seagrasses. While prior studies have explored the general microbial communities and their roles in seagrass meadows, there is a gap in understanding the specific rhizosphere microbiomes of different seagrass species and their interdependent relationships. Our study analyzed the microbial community composition and their metabolism in the rhizosphere of Ruppia sinensis (RS), Zostera japonica (ZJ), and Zostera marina (ZM) obtained from the coastal area of Shandong, China, using high throughput and metagenome sequencing. We found that Rhodobacteraceae, Desulfocapsaceae, and Sulfurovaceae were enriched in RS, ZJ, and ZM samples, respectively, compared with the other two seagrass species, and the bacterial connections were decreased from RS to ZM and ZJ samples. The abundances of nirKS and norBC, mediating denitrification, were higher in RS samples with 2.38% ± 0.59% and 2.14% ± 0.24%, respectively. RS samples also showed a higher level of genes in assimilatory sulfate reduction but lower levels in dissimilatory sulfate reduction and oxidation, with a greater ability to convert sulfide into L-cysteine and acetate. Metagenome-assembled genomes from metagenome of RS rhizosphere had a higher diversity and were assigned to eight phyla. Our study could provide a typical project to analyze the bacterial community structures and metabolic functions in the rhizosphere microbiomes of different seagrasses.<br><br>IMPORTANCE: Seagrasses are indispensable in marine ecosystems, offering numerous critical services, with their health significantly influenced by associated rhizosphere microbiomes. Although studies have investigated the microbial communities and their ecological roles in seagrass meadows, the correlations between rhizosphere microbiome and seagrass species from a particular geographic region are limited. Some studies concentrated on the bacterial composition within the rhizosphere of various seagrasses, but the functional aspects of these microbiomes remain unexplored. Our research delves into this void, revealing that Ruppia sinensis, Zostera japonica, and Zostera marina host diverse bacterial community in the composition, connections, functions, and metabolism, such as nitrogen and sulfur metabolism. Our study revealed that seagrass species play an important role in shaping the rhizosphere microbiomes in an equivalent environment, emphasizing the importance of seagrass species in shaping the rhizosphere microbial communities.}, }
@article {pmid39503092, year = {2025}, author = {Wu, Y and You, Y and Wu, L and Du, M and Ibrahim, A and Suo, H and Zhang, F and Zheng, J}, title = {Integrated metagenomics and metatranscriptomics analyses reveal the impacts of different Lactiplantibacillus plantarum strains on microbial communities and metabolic profiles in pickled bamboo shoots.}, journal = {Food chemistry}, volume = {464}, number = {Pt 2}, pages = {141772}, doi = {10.1016/j.foodchem.2024.141772}, pmid = {39503092}, issn = {1873-7072}, mesh = {*Fermentation ; *Metagenomics ; *Lactobacillus plantarum/metabolism/genetics ; *Microbiota ; Plant Shoots/metabolism/chemistry/microbiology ; Metabolome ; Sasa/microbiology/metabolism ; }, abstract = {Effects of two different Lactobacillus plantarum fermentation processes on microbial communities and metabolic functions were evaluated using metagenomics and metatranscriptomics. Dominant species in Lactobacillus plantarum DACN4208 (LPIF8) and DACN4120 (LPIF10) were Lactobacillus pentosus and Lactobacillus plantarum, with Lactiplantibacillus comprised 75.31 % of the microbial community in LPIF10. Metatranscriptomic revealed that LPIF8 had more genes associated with carbohydrate-binding modules and auxiliary activities, totaling 7500 and 4000 genes, respectively. Metabolic reconstruction further showed that LPIF8 had the most genes involved in pyruvate and lactose metabolism, with 633 and 389 genes, respectively. In contrast, LPIF10 fewer genes related to the biosynthesis and metabolism of phenylalanine, tyrosine, and tryptophan. These results indicate that LPIF8 could efficiently improve fermentation efficiency and increase metabolic activity, while LPIF10 exhibited a more moderate and controlled metabolic process. These provide valuable insights into how different starter cultures influence the structure and metabolic functions of microbial communities in pickled bamboo shoots.}, }
@article {pmid39500921, year = {2024}, author = {Stewart, RD and Oluwalana-Sanusi, AE and Munzeiwa, WA and Magoswana, L and Chaukura, N}, title = {Profiling the bacterial microbiome diversity and assessing the potential to detect antimicrobial resistance bacteria in wastewater in Kimberley, South Africa.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {26867}, pmid = {39500921}, issn = {2045-2322}, mesh = {*Wastewater/microbiology ; South Africa ; *Microbiota/genetics ; *Drug Resistance, Bacterial/genetics ; *Bacteria/genetics/classification/isolation &amp; purification/drug effects ; RNA, Ribosomal, 16S/genetics ; Anti-Bacterial Agents/pharmacology ; Phylogeny ; }, abstract = {Wastewater treatment plants (WWTPs) are hotspots for pathogens, and can facilitate horizontal gene transfer, potentially releasing harmful genetic material and antimicrobial resistance genes into the environment. Little information exists on the composition and behavior of microbes in WWTPs, especially in developing countries. This study used environmental DNA (eDNA) techniques to examine the microbiome load of wastewater from WWTPs. The DNA was isolated from wastewater samples collected from the treatment trains of three WWTPs in Kimberley, South Africa, and the microbial diversity and composition was compared through 16 S rRNA gene sequencing. The microbes detected were of the Kingdom Bacteria, and of these, 48.27% were successfully identified to genus level. The majority of reads from the combined bacterial data fall within the class Gammaproteobacteria, which is known to adversely impact ecological and human health. Arcobacteraceae constituted 19% of the bacterial reads, which is expected as this family is widespread in aquatic environments. Interestingly, the most abundant bacterial group was Bacteroides, which contain a variety of antibiotic-resistant members. Overall, various antibiotic-resistant taxa were detected in the wastewater, indicating a concerning level of antibiotic resistance within the bacterial community. Therefore, eDNA analysis can be a valuable tool in monitoring and assessing the bacterial microbiome in wastewater, thus providing important information for the optimization and improvement of wastewater treatment systems and mitigate public health risks.}, }
@article {pmid39500545, year = {2024}, author = {Hu, X and Bi, J and Yu, Q and Li, H}, title = {Metagenomics reveals the divergence of gut microbiome composition and function in two common pika species (Ochotona curzoniae and Ochotona daurica) in China.}, journal = {FEMS microbiology letters}, volume = {371}, number = {}, pages = {}, doi = {10.1093/femsle/fnae092}, pmid = {39500545}, issn = {1574-6968}, support = {42007026//National Natural Science Foundation of China/ ; }, mesh = {*Gastrointestinal Microbiome/genetics ; *Metagenomics ; China ; Animals ; *Lagomorpha/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Archaea/classification/genetics/isolation &amp; purification ; Viruses/genetics/classification/isolation &amp; purification ; }, abstract = {Gut microbiome plays crucial roles in animal adaptation and evolution. However, research on adaptation and evolution of small wild high-altitude mammals from the perspective of gut microbiome is still limited. In this study, we compared differences in intestinal microbiota composition and function in Plateau pikas (Ochotona curzoniae) and Daurian pikas (O. daurica) using metagenomic sequencing. Our results showed that microbial community structure had distinct differences in different pika species. Prevotella, Methanosarcina, Rhizophagus, and Podoviridae were abundant bacteria, archaea, eukaryotes, and viruses in Plateau pikas, respectively. However, Prevotella, Methanosarcina, Ustilago, and Retroviridae were dominated in Daurian pikas. Functional pathways related to carbohydrate metabolism that refer to the utilization of pectin, hemicellulose, and debranching enzymes were abundant in Plateau pikas, while the function for degradation of chitin, lignin, and cellulose was more concentrated in Daurian pikas. Pika gut had abundant multidrug resistance genes, followed by glycopeptide and beta-lactamase resistance genes, as well as high-risk antibiotic resistance genes, such as mepA, tetM, and bacA. Escherichia coli and Klebsiella pneumoniae may be potential hosts of mepA. This research provided new insights for adaptation and evolution of wild animals from perspective of gut microbiome and broadened our understanding of high-risk antibiotic resistance genes and potential pathogens of wild animals.}, }
@article {pmid39500537, year = {2024}, author = {Slizovskiy, IB and Bonin, N and Bravo, JE and Ferm, PM and Singer, J and Boucher, C and Noyes, NR}, title = {Factors impacting target-enriched long-read sequencing of resistomes and mobilomes.}, journal = {Genome research}, volume = {34}, number = {11}, pages = {2048-2060}, pmid = {39500537}, issn = {1549-5469}, support = {R01 AI141810/AI/NIAID NIH HHS/United States ; R01 AI173928/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; Animals ; *Metagenomics/methods ; Cattle ; Feces/microbiology ; Drug Resistance, Bacterial/genetics ; High-Throughput Nucleotide Sequencing/methods ; Gastrointestinal Microbiome/genetics ; Interspersed Repetitive Sequences ; Sequence Analysis, DNA/methods ; Metagenome ; Bacteria/genetics/drug effects/classification ; Soil Microbiology ; }, abstract = {We investigated the efficiency of target-enriched long-read sequencing (TELSeq) for detecting antimicrobial resistance genes (ARGs) and mobile genetic elements (MGEs) within complex matrices. We aimed to overcome limitations associated with traditional antimicrobial resistance (AMR) detection methods, including short-read shotgun metagenomics, which can lack sensitivity, specificity, and the ability to provide detailed genomic context. By combining biotinylated probe-based enrichment with long-read sequencing, we facilitated the amplification and sequencing of ARGs, eliminating the need for bioinformatic reconstruction. Our experimental design included replicates of human fecal microbiota transplant material, bovine feces, pristine prairie soil, and a mock human gut microbial community, allowing us to examine variables including genomic DNA input and probe set composition. Our findings demonstrated that TELSeq markedly improves the detection rates of ARGs and MGEs compared to traditional sequencing methods, underlining its potential for accurate AMR monitoring. A key insight from our research is the importance of incorporating mobilome profiles to better predict the transferability of ARGs within microbial communities, prompting a recommendation for the use of combined ARG-MGE probe sets for future studies. We also reveal limitations for ARG detection from low-input workflows, and describe the next steps for ongoing protocol refinement to minimize technical variability and expand utility in clinical and public health settings. This effort is part of our broader commitment to advancing methodologies that address the global challenge of AMR.}, }
@article {pmid39500412, year = {2024}, author = {Regar, RK and Kamthan, M and Gaur, VK and Singh, SP and Mishra, S and Dwivedi, S and Mishra, A and Manickam, N and Nautiyal, CS}, title = {Microbiome divergence across four major Indian riverine water ecosystems impacted by anthropogenic contamination: A comparative metagenomic analysis.}, journal = {Chemosphere}, volume = {368}, number = {}, pages = {143672}, doi = {10.1016/j.chemosphere.2024.143672}, pmid = {39500412}, issn = {1879-1298}, mesh = {*Rivers/microbiology/chemistry ; *Microbiota/drug effects ; India ; *Metagenomics ; *Water Pollutants, Chemical/analysis ; Bacteria/genetics/classification/isolation &amp; purification ; Environmental Monitoring/methods ; Biodiversity ; Ecosystem ; Metals, Heavy/analysis ; Water Microbiology ; Bacteriophages ; }, abstract = {Rivers are critical ecosystems that support biodiversity and local livelihoods. This study aimed to evaluate the effects of metal contamination and anthropogenic activities on microbial and phage community dynamics within major Indian river ecosystems, focusing on the Ganga, Narmada, Cauvery, and Gomti rivers -using metagenomic techniques, Biolog, and ICP-MS analysis. Significant variations in microbial communities were observed both within each river and across the four systems, influenced by ecological factors like geography and hydrology, as well as anthropogenic pressures. Downstream sites consistently exhibited higher microbial diversity, with prevalence of Acidobacteria, Actinobacteria, Verrucomicrobia, Firmicutes, and Nitrospirae dominating, while Proteobacteria and Bacteroides declined. The Ganga River showed a higher abundance of bacteriophages compared to other rivers, which gradually reduced with the increment of anthropogenic impact. Functional gene analysis revealed correlations between carbon utilization and metal resistance in contaminated sites. ICP-MS analysis indicates elevated chromium and lead levels in downstream sites of all rivers compared to upstream sites. Interestingly, pristine upstream sites in the Ganga had higher trace element levels than those in Narmada and Cauvery, likely due to its Himalayan origin. Both the Ganga and Cauvery rivers contained numerous metal resistance genes. The Alaknanda was identified as the primary source of microbial communities, bacteriophages, trace elements, and heavy metals in the Ganga. These findings offer new insights into anthropogenic influences on river microbial dynamics and highlight the need for targeted monitoring and management strategies to preserve river health.}, }
@article {pmid39499979, year = {2024}, author = {Zheng, X and Xu, M and Zhang, Z and Yang, L and Liu, X and Zhen, Y and Ye, Z and Wen, J and Liu, P}, title = {Microbial signatures in chronic thromboembolic pulmonary hypertension thrombi: Insights from metagenomic profiling of fresh and organized thrombi.}, journal = {Thrombosis research}, volume = {244}, number = {}, pages = {109204}, doi = {10.1016/j.thromres.2024.109204}, pmid = {39499979}, issn = {1879-2472}, mesh = {Humans ; Female ; Male ; Middle Aged ; *Hypertension, Pulmonary/microbiology ; *Metagenomics/methods ; *Pulmonary Embolism/microbiology ; Thrombosis/microbiology ; Aged ; Chronic Disease ; Adult ; Microbiota ; }, abstract = {OBJECTIVE: Many studies have reported microbial signatures in thrombi at major vascular sites, such as the coronary artery and the middle cerebral artery, which are critical for maintaining proper blood flow and oxygenation. Chronic thromboembolic pulmonary hypertension (CTEPH) is a condition involving non-resolving thrombosis that has not been fully studied. This study explored the microbial taxonomy and functional profiles of both fresh and organized thrombi associated with CTEPH to investigate the role of microbiota in thrombus non-resolving.<br><br>METHODS: In this study, 12 CTEPH fresh thrombi and 12 organized thrombi were collected from 14 patients with CTEPH. Metagenomic sequencing was employed to explore the genomic information of all microorganisms in the thrombus samples.<br><br>RESULTS: Our data demonstrated a diverse range of microorganisms in CTEPH thrombi, whether fresh or organized. Notably, a considerable proportion (54.7&#xa0;%) of sequencing data could not be classified into the relative microbial taxa, highlighting the complexity and novelty of the thrombus ecosystem. Although there were no significant differences in microbial community structure between the two groups, the abundance of dominant microbial species varied. Leuconostoc sp. DORA 2, Staphylococcus aureus, and Aliidongia dinghuensis were common dominant species in CTEPH thrombus. Organized thrombus significantly increased the relative abundance of Staphylococcus aureus, which was confirmed to effectively distinguish between organized and fresh thrombi by LeFSe analysis and random forest analysis. Functional annotation using both the KEGG and eggNOG databases revealed that organized thrombi exhibit stronger metabolic functions, particularly in amino acid metabolism.<br><br>CONCLUSIONS: Our findings suggest that microbial composition and function may play an important role in thrombus organization. Targeting inflammation to prevent thrombosis presents promising opportunities for further research in this area.}, }
@article {pmid39497924, year = {2024}, author = {Li, L and Shao, J and Tong, C and Gao, W and Pan, P and Qi, C and Gao, C and Zhang, Y and Zhu, Y and Chen, C}, title = {Non-tuberculous mycobacteria enhance the tryptophan-kynurenine pathway to induce immunosuppression and facilitate pulmonary colonization.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1455605}, pmid = {39497924}, issn = {2235-2988}, mesh = {Humans ; *Tryptophan/metabolism ; *Kynurenine/metabolism ; *Nontuberculous Mycobacteria ; *Mycobacterium Infections, Nontuberculous/microbiology ; *Lung/microbiology/immunology ; Bronchoalveolar Lavage Fluid/microbiology ; Microbiota ; Metabolic Networks and Pathways ; Pseudomonas aeruginosa/genetics/metabolism ; Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism ; Metabolomics ; Immune Tolerance ; Metagenomics ; }, abstract = {The increasing prevalence of non-tuberculous mycobacterium (NTM) infections alongside tuberculosis (TB) underscores a pressing public health challenge. Yet, the mechanisms governing their infection within the lung remain poorly understood. Here, we integrate metagenomic sequencing, metabolomic sequencing, machine learning classifiers, SparCC, and MetOrigin methods to profile bronchoalveolar lavage fluid (BALF) samples from NTM/TB patients. Our aim is to unravel the intricate interplay between lung microbial communities and NTM/Mycobacterium tuberculosis infections. Our investigation reveals a discernible reduction in the compositional diversity of the lung microbiota and a diminished degree of mutual interaction concomitant with NTM/TB infections. Notably, NTM patients exhibit a distinct microbial community characterized by marked specialization and notable enrichment of Pseudomonas aeruginosa and Staphylococcus aureus, driving pronounced niche specialization for NTM infection. Simultaneously, these microbial shifts significantly disrupt tryptophan metabolism in NTM infection, leading to an elevation of kynurenine. Mycobacterium intracellulare, Mycobacterium paraintracellulare, Mycobacterium abscessus, and Pseudomonas aeruginosa have been implicated in the metabolic pathways associated with the conversion of indole to tryptophan via tryptophan synthase within NTM patients. Additionally, indoleamine-2,3-dioxygenase converts tryptophan into kynurenine, fostering an immunosuppressive milieu during NTM infection. This strategic modulation supports microbial persistence, enabling evasion from immune surveillance and perpetuating a protracted state of NTM infection. The elucidation of these nuanced microbial and metabolic dynamics provides a profound understanding of the intricate processes underlying NTM and TB infections, offering potential avenues for therapeutic intervention and management.}, }
@article {pmid39497628, year = {2024}, author = {Steffen, KJ and Sorgen, AA and Fodor, AA and Carroll, IM and Crosby, RD and Mitchell, JE and Bond, DS and Heinberg, LJ}, title = {Early changes in the gut microbiota are associated with weight outcomes over 2 years following metabolic and bariatric surgery.}, journal = {Obesity (Silver Spring, Md.)}, volume = {32}, number = {11}, pages = {1985-1997}, doi = {10.1002/oby.24168}, pmid = {39497628}, issn = {1930-739X}, support = {1R01DK112585/DK/NIDDK NIH HHS/United States ; 3R01DK112585-01S1/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Bariatric Surgery/methods ; Female ; Male ; Middle Aged ; Adult ; *Weight Loss ; Longitudinal Studies ; Body Mass Index ; Treatment Outcome ; Obesity/surgery/microbiology ; Body-Weight Trajectory ; }, abstract = {OBJECTIVE: Metabolic and bariatric surgery (MBS) is associated with substantial, but variable, weight outcomes. The gut microbiome may be a factor in determining weight trajectory, but examination has been limited by a lack of longitudinal studies with robust microbiome sequencing. This study aimed to describe changes in the microbiome and associations with weight outcomes more than 2 years post surgery.<br><br>METHODS: Data were collected at two Midwestern U.S.<br><br>CENTERS: Adults undergoing primary MBS were assessed before and 1, 6, 12, 18, and 24 months after surgery. BMI and metagenomic sequencing occurred at each assessment. A linear growth mixture model determined class structure for weight trajectory.<br><br>RESULTS: A linear growth mixture model of participants (N&#x2009;=&#x2009;124) revealed a two-class structure; one class had greater sustained weight loss relative to the other. Greater genus-level taxonomic changes in the microbiome composition at each time point were associated with being in the more favorable weight trajectory class, after controlling for surgery type. Higher Proteobacteria relative abundance at 1 month was predictive of percentage weight change at 6, 12, 18, and 24 months (p&#x2009;<&#x2009;0.05 for all).<br><br>CONCLUSIONS: Greater genus-level taxonomic changes in the gut microbiota are associated with improved weight trajectory. Early changes in the gut microbiota may be an important indicator of MBS outcomes and durability.}, }
@article {pmid39496275, year = {2024}, author = {Lazar, A and Phillips, RP and Kivlin, S and Bending, GD and Mushinski, RM}, title = {Understanding the ecological versatility of Tetracladium species in temperate forest soils.}, journal = {Environmental microbiology}, volume = {26}, number = {11}, pages = {e70001}, doi = {10.1111/1462-2920.70001}, pmid = {39496275}, issn = {1462-2920}, support = {DESC0016188//U.S. Department of Energy Office of Biological and Environmental Research, Terrestrial Ecosystem Science Program/ ; NE/S007350/1//UK Research and Innovation Natural Environment Research Council/ ; }, mesh = {*Soil Microbiology ; *Forests ; *Soil/chemistry ; Biodiversity ; Mycorrhizae/classification/genetics ; }, abstract = {Although Tetracladium species have traditionally been studied as aquatic saprotrophs, the growing number of metagenomic and metabarcoding reports detecting them in soil environments raises important questions about their ecological adaptability and versatility. We investigated the factors associated with the relative abundance, diversity and ecological dynamics of Tetracladium in temperate forest soils. Through amplicon sequencing of soil samples collected from 54 stands in six forest sites across the eastern United States, we identified 29 distinct Amplicon Sequence Variants (ASVs) representing Tetracladium, with large differences in relative abundance and small changes in ASV community composition among sites. Tetracladium richness was positively related to soil pH, soil temperature, total sulphur and silt content, and negatively related to plant litter quality, such as the lignin-to-nitrogen ratio and the lignocellulose index. Co-occurrence network analysis indicated negative relationships between Tetracladium and other abundant fungal groups, including ectomycorrhizal and arbuscular mycorrhizal fungi. Collectively, our findings highlight the ecological significance of Tetracladium in temperate forest soils and emphasize the importance of site-specific factors and microbial interactions in shaping their distribution patterns and ecological dynamics.}, }
@article {pmid39494496, year = {2024}, author = {Su, Q and Li, YC and Zhuang, DH and Liu, XY and Gao, H and Li, D and Chen, Y and Ge, MX and Han, YM and Gao, ZL and Yin, FQ and Zhao, L and Zhang, YX and Yang, LQ and Zhao, Q and Luo, YJ and Zhang, Z and Kong, QP}, title = {Rewiring of Uric Acid Metabolism in the Intestine Promotes High-Altitude Hypoxia Adaptation in Humans.}, journal = {Molecular biology and evolution}, volume = {41}, number = {11}, pages = {}, pmid = {39494496}, issn = {1537-1719}, mesh = {Humans ; *Uric Acid/metabolism ; Male ; Adult ; *Acclimatization ; *Altitude ; *Gastrointestinal Microbiome ; Hypoxia/metabolism ; Altitude Sickness/metabolism ; Intestines/metabolism ; Feces ; Adaptation, Physiological ; Longitudinal Studies ; China ; }, abstract = {Adaptation to high-altitude hypoxia is characterized by systemic and organ-specific metabolic changes. This study investigates whether intestinal metabolic rewiring is a contributing factor to hypoxia adaptation. We conducted a longitudinal analysis over 108 days, with seven time points, examining fecal metabolomic data from a cohort of 46 healthy male adults traveling from Chongqing (a.s.l. 243 m) to Lhasa (a.s.l. 3,658 m) and back. Our findings reveal that short-term hypoxia exposure significantly alters intestinal metabolic pathways, particularly those involving purines, pyrimidines, and amino acids. A notable observation was the significantly reduced level of intestinal uric acid, the end product of purine metabolism, during acclimatization (also called acclimation) and additional two long-term exposed cohorts (Han Chinese and Tibetans) residing in Shigatse, Xizang (a.s.l. 4,700 m), suggesting that low intestinal uric acid levels facilitate adaptation to high-altitude hypoxia. Integrative analyses with gut metagenomic data showed consistent trends in intestinal uric acid levels and the abundance of key uric acid-degrading bacteria, predominantly from the Lachnospiraceae family. The sustained high abundance of these bacteria in the long-term resident cohorts underscores their essential role in maintaining low intestinal uric acid levels. Collectively, these findings suggest that the rewiring of intestinal uric acid metabolism, potentially orchestrated by gut bacteria, is crucial for enhancing human resilience and adaptability in extreme environments.}, }
@article {pmid39494289, year = {2024}, author = {Rueangmongkolrat, N and Uthaipaisanwong, P and Kusonmano, K and Pruksangkul, S and Sonthiphand, P}, title = {The role of microbiomes in cooperative detoxification mechanisms of arsenate reduction and arsenic methylation in surface agricultural soil.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18383}, pmid = {39494289}, issn = {2167-8359}, mesh = {*Soil Microbiology ; *Microbiota ; *Arsenates/metabolism ; *Arsenic/metabolism ; *Soil Pollutants/metabolism ; Methylation ; *Agriculture/methods ; Soil/chemistry ; Bacteria/metabolism/genetics/classification/isolation &amp; purification ; Metagenomics ; Oxidation-Reduction ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Microbial arsenic (As) transformations play a vital role in both driving the global arsenic biogeochemical cycle and determining the mobility and toxicity of arsenic in soils. Due to the complexity of soils, variations in soil characteristics, and the presence and condition of overlying vegetation, soil microbiomes and their functional pathways vary from site to site. Consequently, key arsenic-transforming mechanisms in soil are not well characterized. This study utilized a combination of high-throughput amplicon sequencing and shotgun metagenomics to identify arsenic-transforming pathways in surface agricultural soils. The temporal and successional variations of the soil microbiome and arsenic-transforming bacteria in agricultural soils were examined during tropical monsoonal dry and wet seasons, with a six-month interval. Soil microbiomes of both dry and wet seasons were relatively consistent, particularly the relative abundance of Chloroflexi, Gemmatimonadota, and Bacteroidota. Common bacterial taxa present at high abundance, and potentially capable of arsenic transformations, were Bacillus, Streptomyces, and Microvirga. The resulting shotgun metagenome indicated that among the four key arsenic-functional genes, the arsC gene exhibited the highest relative abundance, followed by the arsM, aioA, and arrA genes, in declining sequence. Gene sequencing data based on 16S rRNA predicted only the arsC and aioA genes. Overall, this study proposed that a cooperative mechanism involving detoxification through arsenate reduction and arsenic methylation was a key arsenic transformation in surface agricultural soils with low arsenic concentration (7.60 to 10.28 mg/kg). This study significantly advances our knowledge of arsenic-transforming mechanisms interconnected with microbial communities in agricultural soil, enhancing pollution control measures, mitigating risks, and promoting sustainable soil management practices.}, }
@article {pmid39490992, year = {2024}, author = {Cansdale, A and Chong, JPJ}, title = {MAGqual: a stand-alone pipeline to assess the quality of metagenome-assembled genomes.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {226}, pmid = {39490992}, issn = {2049-2618}, mesh = {*Metagenomics/methods ; *Metagenome ; Software ; Microbiota/genetics ; High-Throughput Nucleotide Sequencing/methods ; Bacteria/genetics/classification ; Humans ; }, abstract = {BACKGROUND: Metagenomics, the whole genome sequencing of microbial communities, has provided insight into complex ecosystems. It has facilitated the discovery of novel microorganisms, explained community interactions and found applications in various fields. Advances in high-throughput and third-generation sequencing technologies have further fuelled its popularity. Nevertheless, managing the vast data produced and addressing variable dataset quality remain ongoing challenges. Another challenge arises from the number of assembly and binning strategies used across studies. Comparing datasets and analysis tools is complex as it requires the quantitative assessment of metagenome quality. The inherent limitations of metagenomic sequencing, which often involves sequencing complex communities, mean community members are challenging to interrogate with traditional culturing methods leading to many lacking reference sequences. MIMAG standards aim to provide a method to assess metagenome quality for comparison but have not been widely adopted.<br><br>RESULTS: To address the need for simple and quick metagenome quality assignation, here we introduce the pipeline MAGqual (Metagenome-Assembled Genome qualifier) and demonstrate its effectiveness at determining metagenomic dataset quality in the context of the MIMAG standards.<br><br>CONCLUSIONS: The MAGqual pipeline offers an accessible way to evaluate metagenome quality and generate metadata on a large scale. MAGqual is built in Snakemake to ensure readability and scalability, and its open-source nature promotes accessibility, community development, and ease of updates. MAGqual is built in Snakemake, R, and Python and is available under the MIT license on GitHub at https://github.com/ac1513/MAGqual . Video Abstract.}, }
@article {pmid39490825, year = {2024}, author = {Liang, W and Yan, D and Zhang, M and Wang, J and Ni, D and Yun, S and Wei, X and Zhang, L and Fu, H}, title = {Unraveling methanogenesis processes and pathways for Quaternary shallow biogenic gas in aquifer systems through geochemical, genomic and transcriptomic analyses.}, journal = {The Science of the total environment}, volume = {955}, number = {}, pages = {177189}, doi = {10.1016/j.scitotenv.2024.177189}, pmid = {39490825}, issn = {1879-1026}, mesh = {*Methane/metabolism ; *Groundwater/chemistry/microbiology ; China ; Transcriptome ; Microbiota ; Gene Expression Profiling ; Genomics ; Environmental Monitoring ; }, abstract = {Shallow biogenic gas is crucial in global warming and carbon cycling. Considering the knowledge gap in the understanding of methanogenesis and metabolic mechanisms within shallow groundwater systems, we investigated Quaternary shallow biogenic gas resources from the Hetao Basin in North China, which were previously underexplored. We systematically analyzed the genesis of gas and formation water, microbial communities, methanogenic processes, and pathways using geochemistry, genomics, and transcriptomics. Our findings indicated that active freshwater environments are conducive to microbial activity and the generation of primary microbial gases. A diverse range of microbes with functions, such as hydrolysis (e.g., Caulobacter), acidogenesis, and hydrogen production (e.g., Sediminibacterium), synergistically contributed to the methanogenic process. Methanogens predominantly comprised hydrogenotrophic methanogens (e.g., Methanobacteriales), although H2-dependent methylotrophic methanogens (e.g., Methanofastidiosa) were also prevalent. The metabolic processes of the different methanogenic pathways were revealed based on functional gene analysis and mapping results. Furthermore, the composition of the community structure, functional predictions, metagenomics, and metatranscriptomics underscored the contribution of the hydrogenotrophic pathway, which ranged from 52.22 % to 79.23 %. The aceticlastic pathway exhibited high gene abundance and was primarily associated with methylotrophs and other potential pathways. The H2-dependent methylotrophic methanogenesis pathway was constrained by low metabolic activity. By revealing the methane production mechanism of biogenic gas in shallow aquifer systems, this study provides a new perspective and profound comprehension of its ecological and environmental implications worldwide.}, }
@article {pmid39490771, year = {2025}, author = {Li, T and Coker, OO and Sun, Y and Li, S and Liu, C and Lin, Y and Wong, SH and Miao, Y and Sung, JJY and Yu, J}, title = {Multi-Cohort Analysis Reveals Altered Archaea in Colorectal Cancer Fecal Samples Across Populations.}, journal = {Gastroenterology}, volume = {168}, number = {3}, pages = {525-538.e2}, doi = {10.1053/j.gastro.2024.10.023}, pmid = {39490771}, issn = {1528-0012}, mesh = {Humans ; *Colorectal Neoplasms/microbiology/diagnosis ; *Feces/microbiology ; *Gastrointestinal Microbiome ; *Archaea/genetics/isolation &amp; purification/classification ; Female ; Male ; Middle Aged ; *Adenoma/microbiology/diagnosis ; Aged ; Case-Control Studies ; Metagenomics ; Metagenome ; Adult ; }, abstract = {BACKGROUND &amp; AIMS: Archaea are important components of the host microbiome, but their roles in colorectal cancer (CRC) remain largely unclear. We aimed to elucidate the contribution of gut archaea to CRC across multiple populations.<br><br>METHODS: This study incorporated fecal metagenomic data from 10 independent cohorts across 7 countries and an additional in-house cohort, totaling 2101 metagenomes (748 CRC, 471 adenoma, and 882 healthy controls [HCs]). Taxonomic profiling was performed using Kraken2 against the Genome Taxonomy Database. Alterations of archaeal communities and their interactions with bacteria, as well as methanogenic functions were analyzed. A Random Forest model was used to identify multicohort diagnostic microbial biomarkers in CRC.<br><br>RESULTS: The overall archaeal alpha diversity shifted from HCs, patients with adenoma, to patients with CRC with the Methanobacteriota phylum enriched while the order Methanomassiliicoccales depleted. At the species level, Methanobrevibacter_A smithii and Methanobrevibacter_A sp002496065 were enriched, whereas 8 species, including Methanosphaera stadtmanae and Methanomassiliicoccus_A intestinalis, were depleted in patients with CRC across multiple cohorts. Among them, M stadtmanae, Methanobrevibacter_A sp900314695, and Methanocorpusculum sp001940805 exhibited a progressive decrease in the HC-adenoma-CRC sequence. CRC-depleted methanogenic archaea exhibited enhanced co-occurring interactions with butyrate-producing bacteria. Consistently, methanogenesis-related genes and pathways were enriched in patients with CRC. A model incorporating archaeal and bacterial biomarkers outperformed single-kingdom models in discriminating patients with CRC from healthy individuals with the area under the curve ranging from 0.744 to 0.931 in leave-one-cohort-out analysis.<br><br>CONCLUSIONS: This multicohort analysis uncovered significant alterations in gut archaea and their interactions with bacteria in healthy individuals, patients with adenoma, and patients with CRC. Archaeal biomarkers, combined with bacterial features, have potential as noninvasive diagnostic biomarkers for CRC.}, }
@article {pmid39490764, year = {2024}, author = {Witkabel, P and Abendroth, C}, title = {A systematic literature review of microbial anammox consortia in UASB/ EGSB-reactors.}, journal = {Chemosphere}, volume = {367}, number = {}, pages = {143630}, doi = {10.1016/j.chemosphere.2024.143630}, pmid = {39490764}, issn = {1879-1298}, mesh = {*Bioreactors/microbiology ; *Bacteria/metabolism/genetics/classification ; *Oxidation-Reduction ; *Waste Disposal, Fluid/methods ; *Wastewater/microbiology ; *Archaea/metabolism/genetics ; Ammonium Compounds/metabolism ; Microbial Consortia ; Anaerobiosis ; Ammonia/metabolism ; }, abstract = {Anaerobic ammonium oxidation (anammox) poses an emerging research field as it can outstand previous processes of biological wastewater treatment in terms of efficiency and costs. Anammox bacteria have the ability to metabolise NH4[+] and NO2[-] to produce N2 under anaerobic conditions. Despite numerous studies, there is a lack of research on the co-occurrence and interrelationship of the predominant microbes that inhabit anammox-related processes. This systematic literature review follows the PSALSAR approach to assess metagenomic data on anammox bacteria and functional microbes in upstream reactors. Essential information on the physiology, metabolic pathways and inhibitory effects of anammox bacteria are reviewed and functional bacteria such as ammonia-oxidising bacteria (AOB), nitrite-oxidising bacteria (NOB), ammonia-oxidising Archaea (AOA) and denitrifying bacteria are identified. Candidatus Kuenenia and Candidatus Brocadia were the most frequently sequenced genera in the observed literature. Pseudomonadota, Chloroflexota and Bacteroidota were prevalent regardless of crucial operational parameters and configurations that affect the microbial community. Interrelationship analysis revealed a positive association between the versatility of a phylum's metabolism and its presence in the observed wastewater treatment literature. Several groups, such as Calditrichota, Myxococcota and Deinococcota are highly underrepresented, a finding that should be investigated in more detail. No evidence was found to suggest that high anammox ratios are correlated with high nitrogen removal efficiencies, as some studies found high efficiency despite low anammox abundance (<1%).}, }
@article {pmid39490442, year = {2024}, author = {Gregoris, K and Pope, WH}, title = {Extraction of high-quality metagenomic DNA from the lichens Flavoparmelia caperata and Peltigera membranacea.}, journal = {Journal of microbiological methods}, volume = {227}, number = {}, pages = {107065}, doi = {10.1016/j.mimet.2024.107065}, pmid = {39490442}, issn = {1872-8359}, mesh = {*Lichens ; *Metagenomics/methods ; DNA, Fungal/genetics/isolation &amp; purification ; Polymerase Chain Reaction/methods ; Microbiota/genetics ; Metagenome ; Ascomycota/genetics/classification/isolation &amp; purification/chemistry ; }, abstract = {Lichens are composite organisms found throughout temperate terrestrial forests, with species-specific associations with industrial air pollution. Metagenomic analysis of lichen samples requires robust nucleic acid extraction methodology, a process that is challenging due to the protective cortex layers, high polysaccharide content, and the vast diversity of the internal microbiome. Our method includes physical lysis through garnet bead beating, chemical lysis using a sodium dodecyl sulfate buffer, phenol:chloroform:isoamyl alcohol extraction, and ethanol precipitation. The method was tested on three different lichen samples from two distinct species and yielded metagenomic DNA suitable for sequencing and PCR amplification. This procedure addresses the issues associated with DNA extraction from lichen using common laboratory equipment and reagents without the utilization of liquid nitrogen. This paper presents a cost-effective and accessible DNA extraction method for obtaining high-quality genetic material from dried and preserved lichen specimens.}, }
@article {pmid39490096, year = {2025}, author = {Ji, J and Zhao, Y and Wu, G and Hu, F and Yang, H and Bai, Z and Jin, B and Yang, X}, title = {Responses of endogenous partial denitrification process to acetate and propionate as carbon sources: Nitrite accumulation performance, microbial community dynamic changes, and metagenomic insights.}, journal = {Water research}, volume = {268}, number = {Pt A}, pages = {122680}, doi = {10.1016/j.watres.2024.122680}, pmid = {39490096}, issn = {1879-2448}, mesh = {*Denitrification ; *Nitrites/metabolism ; *Propionates/metabolism ; *Carbon/metabolism ; *Acetates/metabolism ; Bioreactors ; Microbiota ; Nitrates/metabolism ; }, abstract = {Endogenous partial denitrification (EPD) offered a promising pathway for supplying nitrite to anammox, and it also enabled energy-efficient and cost-effective nitrogen removal. However, information about the impact of different carbon sources on the EPD system was limited, and the metabolic mechanisms remained unclear. This study operated the EPD system for 180 days with various acetate and propionate ratios over eight phases. The nitrate-to-nitrite transformation ratio (NTR) decreased from 81.7 % to 0.4 % as the acetate/propionate (Ac/Pr) ratio shifted from 3:0 to 0:3, but the NTR returned to 86.1 % after propionate was replaced with acetate. Typical cycles indicated that PHB (126.8 and 133.9 mg COD/g VSS, respectively) was mainly stored, facilitating a higher NTR (87.8 % and 67.7 %, respectively) on days 58 and 180 in the presence of acetate. In contrast, on day 158 in the presence of propionate, PHV (84.8 mg COD/g VSS) was predominantly stored, resulting in negligible nitrite accumulation (0.2 mg N/L). Metagenomic analysis revealed that the microbial community structure did not significantly change, and the (narGHI+napAB)/nirKS ratio consistently exceeded 7:2, despite variations in the carbon source. Compared with acetate, propionate as carbon source reduced the abundance of genes encoding NADH-producing enzymes (e.g., mdh), likely owing to a shift in PHAs synthesis and degradation pathways. Consequently, limited NADH affected electron distribution and transfer rates, thereby decreasing the nitrate reduction rate and causing nitrite produced by narGHI and napAB to be immediately reduced by nirKS. This study provided new insights and guidance for EPD systems to manage the conditions of carbon deficiency or complex carbon sources.}, }
@article {pmid39487149, year = {2024}, author = {Sato, T and Abe, K and Koseki, J and Seto, M and Yokoyama, J and Akashi, T and Terada, M and Kadowaki, K and Yoshida, S and Yamashiki, YA and Shimamura, T}, title = {Survivability and life support in sealed mini-ecosystems with simulated planetary soils.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {26322}, pmid = {39487149}, issn = {2045-2322}, mesh = {*Soil Microbiology ; *Soil/chemistry ; *Ecosystem ; Ecological Systems, Closed ; Microbiota ; Life Support Systems ; Space Flight ; Extraterrestrial Environment ; Groundwater/microbiology ; Plants/microbiology/metabolism ; Cyanobacteria/growth &amp; development/metabolism/physiology ; Animals ; }, abstract = {Establishing a sustainable life-support system for space exploration is a formidable challenge due to the vast distances, high costs, and environmental differences from Earth. Building upon the lessons from the Biosphere 2 experiment, we introduce the novel "Ecosphere" and "Biosealed" systems, self-sustaining ecosystems within customizable, enclosed containers. These systems incorporate terrestrial ecosystems and groundwater layers, offering a potential model for transplanting Earth-like biomes to extraterrestrial environments. Over 4 years, we conducted rigorous experiments and analyses to understand the dynamics of these enclosed ecosystems. We successfully mitigated moisture deficiency, a major obstacle to plant growth, by incorporating groundwater layers. Additionally, we quantified microbial communities proliferating in specific soils, including simulated lunar and Ryugu asteroid regolith, enhance plant cultivation in space environments. Metagenomic analysis of these simulated space soils revealed diverse microbial populations and their crucial role in plant growth and ecosystem stability. Notably, we identified symbiotic relationships between plants and Cyanobacteria, enhancing oxygen production, and demonstrated the potential of LED lighting as an alternative light source for plant cultivation in sun-limited space missions. We also confirmed the survival of fruit flies within these systems, relying on plant-produced oxygen and photosynthetic bacteria. Our research provides a comprehensive framework for developing future space life-support systems. The novelty of our work lies in the unique design of our enclosed ecosystems, incorporating groundwater layers and simulated extraterrestrial soils, and the detailed analysis of microbial communities within these systems. These findings offer valuable insights into the challenges and potential solutions for establishing sustainable human habitats in space, including the importance of microbial management and potential health concerns related to microbial exposure.}, }
@article {pmid39483461, year = {2024}, author = {Chen, G and Ren, Q and Zhong, Z and Li, Q and Huang, Z and Zhang, C and Yuan, H and Feng, Z and Chen, B and Wang, N and Feng, Y}, title = {Exploring the gut microbiome's role in colorectal cancer: diagnostic and prognostic implications.}, journal = {Frontiers in immunology}, volume = {15}, number = {}, pages = {1431747}, pmid = {39483461}, issn = {1664-3224}, mesh = {*Colorectal Neoplasms/microbiology/diagnosis/immunology/etiology ; Humans ; *Gastrointestinal Microbiome/immunology ; Prognosis ; Animals ; Biomarkers, Tumor ; Early Detection of Cancer ; Metagenomics/methods ; }, abstract = {The intricate interplay between the gut microbiome and colorectal cancer (CRC) presents novel avenues for early diagnosis and prognosis, crucial for improving patient outcomes. This comprehensive review synthesizes current findings on the gut microbiome's contribution to CRC pathogenesis, highlighting its potential as a biomarker for non-invasive CRC screening strategies. We explore the mechanisms through which the microbiome influences CRC, including its roles in inflammation, metabolism, and immune response modulation. Furthermore, we assess the viability of microbial signatures as predictive tools for CRC prognosis, offering insights into personalized treatment approaches. Our analysis underscores the necessity for advanced metagenomic studies to elucidate the complex microbiome-CRC nexus, aiming to refine diagnostic accuracy and prognostic assessment in clinical settings. This review propels forward the understanding of the microbiome's diagnostic and prognostic capabilities, paving the way for microbiome-based interventions in CRC management.}, }
@article {pmid39482450, year = {2024}, author = {Gao, L and Rao, MPN and Liu, YH and Wang, PD and Lian, ZH and Abdugheni, R and Jiang, HC and Jiao, JY and Shurigin, V and Fang, BZ and Li, WJ}, title = {SALINITY-Induced Changes in Diversity, Stability, and Functional Profiles of Microbial Communities in Different Saline Lakes in Arid Areas.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {135}, pmid = {39482450}, issn = {1432-184X}, support = {2021FY100900//National Science and Technology Fundamental Resources Investigation Program of China/ ; 2022D01A154//Natural Science Foundation of Xinjiang Uygur Autonomous Region/ ; 2022B0202110001//Key-Area Research and Development Programof Guangdong Province/ ; }, mesh = {*Lakes/microbiology/chemistry ; *Salinity ; *Archaea/genetics/classification/isolation &amp; purification ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota ; *RNA, Ribosomal, 16S/genetics ; *Biodiversity ; Geologic Sediments/microbiology ; Phylogeny ; Desert Climate ; Ecosystem ; }, abstract = {Saline lakes, characterized by high salinity and limited nutrient availability, provide an ideal environment for studying extreme halophiles and their biogeochemical processes. The present study examined prokaryotic microbial communities and their ecological functions in lentic sediments (with the salinity gradient and time series) using 16S rRNA amplicon sequencing and a metagenomic approach. Our findings revealed a negative correlation between microbial diversity and salinity. The notable predominance of Archaea in high-salinity lakes signified a considerable alteration in the composition of the microbial community. The results indicate that elevated salinity promotes homogeneous selection pressures, causing substantial alterations in microbial diversity and community structure, and simultaneously hindering interactions among microorganisms. This results in a notable decrease in the complexity of microbial ecological networks, ultimately influencing the overall ecological functional responses of microbial communities such as carbon fixation, sulfur, and nitrogen metabolism. Overall, our findings reveal salinity drives a notable predominance of Archaea, selects for species adapted to extreme conditions, and decreases microbial community complexity within saline lake ecosystems.}, }
@article {pmid39488668, year = {2024}, author = {Geat, N and Singh, D and Saha, P and Jatoth, R and Babu, PL and Devi, GSR and Lakhran, L and Singh, D}, title = {Deciphering Phyllomicrobiome of Cauliflower Leaf: Revelation by Metagenomic and Microbiological Analysis of Tolerant and Susceptible Genotypes Against Black Rot Disease.}, journal = {Current microbiology}, volume = {81}, number = {12}, pages = {439}, pmid = {39488668}, issn = {1432-0991}, mesh = {*Plant Diseases/microbiology ; *Plant Leaves/microbiology ; *Microbiota/genetics ; *Genotype ; *Brassica/microbiology ; *Metagenomics ; *Bacteria/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Xanthomonas campestris/genetics ; Phylogeny ; High-Throughput Nucleotide Sequencing ; }, abstract = {Understanding the phyllomicrobiome dynamics in cauliflower plants holds significant promise for enhancing crop resilience against black rot disease, caused by Xanthomonas campestris pv. campestris. In this study, the culturable microbiome and metagenomic profile of tolerant (BR-161) and susceptible (Pusa Sharad) cauliflower genotypes were investigated to elucidate microbial interactions associated with disease tolerance. Isolation of phyllospheric bacteria from asymptomatic and black rot disease symptomatic leaves of tolerant and susceptible cultivars yielded 46 diverse bacterial isolates. Molecular identification via 16S rRNA sequencing revealed differences in the diversity of microbial taxa between genotypes and health conditions. Metagenomic profiling using next-generation sequencing elucidated distinct microbial communities, with higher diversity observed in black rot disease symptomatic leaf of BR-161. Alpha and beta diversity indices highlighted differences in microbial community structure and composition between genotypes and health conditions. Taxonomic analysis revealed a core microbiome consisting of genera such as Xanthomonas, Psychrobacillus, Lactobacillus, and Pseudomonas across all the samples. Validation through microbiological methods confirmed the presence of these key genera. The findings provide novel insights into the phyllomicrobiome of black rot-tolerant and susceptible genotypes of cauliflower. Harnessing beneficial microbial communities identified in this study offers promising avenues for developing sustainable strategies to manage black rot disease and enhance cauliflower crop health and productivity.}, }
@article {pmid39488451, year = {2025}, author = {Xiao, C and Ide, K and Matsunaga, H and Kogawa, M and Wagatsuma, R and Takeyama, H}, title = {Metagenomic profiling of antibiotic resistance genes and their associations with the bacterial community along the Kanda River, an urban river in Japan.}, journal = {Journal of bioscience and bioengineering}, volume = {139}, number = {2}, pages = {147-155}, doi = {10.1016/j.jbiosc.2024.09.006}, pmid = {39488451}, issn = {1347-4421}, mesh = {*Rivers/microbiology ; Japan ; *Metagenomics ; *Bacteria/genetics/classification/drug effects/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; *Drug Resistance, Microbial/genetics ; *Genes, Bacterial ; Cities ; Seasons ; Anti-Bacterial Agents/pharmacology ; *Microbiota/genetics ; *Drug Resistance, Bacterial/genetics ; Metagenome ; }, abstract = {Antibiotic resistance genes (ARGs) present in urban rivers have the potential to disseminate antibiotic-resistant bacteria into other environments, posing significant threats to both ecological and public health. Although metagenomic analyses have been widely employed to detect ARGs in rivers, our understanding of their dynamics across different seasons in diverse watersheds remains limited. In this study, we performed a comprehensive genomic analysis of the Kanda River in Japan at 11 sites from upstream to estuary throughout the year to assess the spread of ARGs and their associations with bacterial communities. Analysis of 110 water samples using the 16S rRNA gene revealed variations in bacterial composition corresponding to seasonal changes in environmental parameters along the river. Shotgun metagenomics-based profiling of ARGs in 44 water samples indicated higher ARG abundance downstream, particularly during the summer. Weighted gene co-expression network analysis (WGCNA) linking bacterial lineages and ARGs revealed that 12 ARG subtypes co-occurred with 128 amplicon sequence variants (ASVs). WGCNA suggested potential hosts for ErmB, ErmF, ErmG, tetQ, tet (W/N/W), aadA2, and adeF, including gut-associated bacteria (e.g., Prevotella, Bacteroides, Arcobacter) and indigenous aquatic microbes (e.g., Limnohabitans and C39). In addition, Pseudarcobacter (a later synonym of Arcobater) was identified as a host for adeF, which was also confirmed by single cell genomics. This study shows that ARG distribution in urban rivers is affected by seasonal and geographical factors and demonstrates the importance of monitoring rivers using multiple types of genome sequencing, including 16S rRNA gene sequencing, metagenomics, and single cell genomics.}, }
@article {pmid39487448, year = {2024}, author = {Kosch, TA and Torres-Sánchez, M and Liedtke, HC and Summers, K and Yun, MH and Crawford, AJ and Maddock, ST and Ahammed, MS and Araújo, VLN and Bertola, LV and Bucciarelli, GM and Carné, A and Carneiro, CM and Chan, KO and Chen, Y and Crottini, A and da Silva, JM and Denton, RD and Dittrich, C and Espregueira Themudo, G and Farquharson, KA and Forsdick, NJ and Gilbert, E and Che, J and Katzenback, BA and Kotharambath, R and Levis, NA and Márquez, R and Mazepa, G and Mulder, KP and Müller, H and O'Connell, MJ and Orozco-terWengel, P and Palomar, G and Petzold, A and Pfennig, DW and Pfennig, KS and Reichert, MS and Robert, J and Scherz, MD and Siu-Ting, K and Snead, AA and Stöck, M and Stuckert, AMM and Stynoski, JL and Tarvin, RD and Wollenberg Valero, KC and , }, title = {The Amphibian Genomics Consortium: advancing genomic and genetic resources for amphibian research and conservation.}, journal = {BMC genomics}, volume = {25}, number = {1}, pages = {1025}, pmid = {39487448}, issn = {1471-2164}, mesh = {Animals ; *Amphibians/genetics ; *Genomics/methods ; Conservation of Natural Resources/methods ; Genome ; }, abstract = {Amphibians represent a diverse group of tetrapods, marked by deep divergence times between their three systematic orders and families. Studying amphibian biology through the genomics lens increases our understanding of the features of this animal class and that of other terrestrial vertebrates. The need for amphibian genomic resources is more urgent than ever due to the increasing threats to this group. Amphibians are one of the most imperiled taxonomic groups, with approximately 41% of species threatened with extinction due to habitat loss, changes in land use patterns, disease, climate change, and their synergistic effects. Amphibian genomic resources have provided a better understanding of ontogenetic diversity, tissue regeneration, diverse life history and reproductive modes, anti-predator strategies, and resilience and adaptive responses. They also serve as essential models for studying broad genomic traits, such as evolutionary genome expansions and contractions, as they exhibit the widest range of genome sizes among all animal taxa and possess multiple mechanisms of genetic sex determination. Despite these features, genome sequencing of amphibians has significantly lagged behind that of other vertebrates, primarily due to the challenges of assembling their large, repeat-rich genomes and the relative lack of societal support. The emergence of long-read sequencing technologies, combined with advanced molecular and computational techniques that improve scaffolding and reduce computational workloads, is now making it possible to address some of these challenges. To promote and accelerate the production and use of amphibian genomics research through international coordination and collaboration, we launched the Amphibian Genomics Consortium (AGC, https://mvs.unimelb.edu.au/amphibian-genomics-consortium) in early 2023. This burgeoning community already has more than 282 members from 41 countries. The AGC aims to leverage the diverse capabilities of its members to advance genomic resources for amphibians and bridge the implementation gap between biologists, bioinformaticians, and conservation practitioners. Here we evaluate the state of the field of amphibian genomics, highlight previous studies, present challenges to overcome, and call on the research and conservation communities to unite as part of the AGC to enable amphibian genomics research to "leap" to the next level.}, }
@article {pmid39487079, year = {2025}, author = {Williams, AD and Leung, VW and Tang, JW and Hidekazu, N and Suzuki, N and Clarke, AC and Pearce, DA and Lam, TT}, title = {Ancient environmental microbiomes and the cryosphere.}, journal = {Trends in microbiology}, volume = {33}, number = {2}, pages = {233-249}, doi = {10.1016/j.tim.2024.09.010}, pmid = {39487079}, issn = {1878-4380}, mesh = {*Microbiota/genetics ; *Permafrost/microbiology ; Metagenomics/methods ; Ice ; *Environmental Microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Computational Biology/methods ; }, abstract = {In this review, we delineate the unique set of characteristics associated with cryosphere environments (namely, ice and permafrost) which present both challenges and opportunities for studying ancient environmental microbiomes (AEMs). In a field currently reliant on several assumptions, we discuss the theoretical and empirical feasibility of recovering microbial nucleic acids (NAs) from ice and permafrost with varying degrees of antiquity. We also summarize contamination control best practices and highlight considerations for the latest approaches, including shotgun metagenomics, and downstream bioinformatic authentication approaches. We review the adoption of existing software and provide an overview of more recently published programs, with reference to their suitability for AEM studies. Finally, we summarize outstanding challenges and likely future directions for AEM research.}, }
@article {pmid39486340, year = {2024}, author = {Zhang, H and Cheng, S and Yan, W and Zhang, Q and Jiang, B and Xing, Y and Zhang, B}, title = {Interplay between vanadium distribution and microbial community in soil-plant system.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {136303}, doi = {10.1016/j.jhazmat.2024.136303}, pmid = {39486340}, issn = {1873-3336}, mesh = {*Vanadium/metabolism ; *Soil Microbiology ; *Soil Pollutants/metabolism ; RNA, Ribosomal, 16S/genetics ; Rhizosphere ; Microbiota ; Bacteria/metabolism/genetics/classification ; Biodegradation, Environmental ; Plant Roots/microbiology/metabolism ; }, abstract = {Soil-plant system play an essential role in distribution and transformation of vanadium (V). V shapes the diversity of soil communities, while soil microorganisms mediate V transformation. Plants also absorb V from surrounding soil. However, the study of microbial response to V stress in different soil-plant compartments is limited, and the metabolic functions driving V transformation across these systems remain elusive. The study investigates the distribution of V in soil-plant systems nearby a V smelter. 16S rRNA sequencing and metagenomics are utilized to reveal the microbial adaptation and V transformation in bulk soil, rhizosphere, and endosphere. Bothriochloa ischaemum (L.) Keng. (BK) exhibits higher phytoextraction potential (TF = 0.74 ± 0.26). Environmental variables, including pH, V, OM, and AP, show significant (p < 0.05) influence in soil community composition, with homogeneous selection governing the assembly processes in bulk soil and rhizosphere, while stochastic process dominates endospheric assembly. Metagenomic investigation revealed a coordinated metabolic pathway between functional taxa in soil and plants, which lead to root uptake and translocation. V stress is mitigated through Nocardioide, Microvirga, and Solirubrobacter, putatively harboring V(V) reduction genes n arG and mtrC in soil. In rhizosphere, citrate synthase gltA and alkaline phosphatase phoD exhibit functional potential to facilitate formation of V-complexation to increase V mobility. In endoshere, endophytic Enterobacter further detoxifies V(V), and likely promotes V translocation through siderophore biosynthesis gene, iucA. These findings enhance our understanding on interplay between V and microbial community in soil-plant systems, which is instrumental in developing mitigation plan for V contaminated sites.}, }
@article {pmid39485561, year = {2024}, author = {Achudhan, AB and Saleena, LM}, title = {Comparative genomic analysis and characterization of novel high-quality draft genomes from the coal metagenome.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {40}, number = {12}, pages = {370}, pmid = {39485561}, issn = {1573-0972}, mesh = {*Coal/microbiology ; *Metagenome ; *Phylogeny ; *Bacteria/genetics/classification ; *Genome, Bacterial ; High-Throughput Nucleotide Sequencing ; Sequence Analysis, DNA ; Genomics/methods ; Metagenomics/methods ; Microbiota/genetics ; DNA, Bacterial/genetics ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Coal, a sedimentary rock harbours a complex microbial community that plays a significant role in its formation and characteristics. However, coal metagenome sequencing and studies were less, limiting our understanding of this complex ecosystem. This study aimed to reconstruct high-quality metagenome-assembled genomes (MAGs) from the coal sample collected in the Neyveli mine to explore the unrevealed diversity of the coal microbiome. Using Illumina sequencing, we obtained high-quality raw reads in FASTQ format. Subsequently, de novo assembly and binning with metaWRAP software facilitated the reconstruction of coal MAGs. Quality assessment using CheckM identified 10 High-Quality MAGs (HQ MAGs), 7 medium-quality MAGs (MQ MAGs), and 6 low-quality MAGs (LQ MAGs). Further analysis using GTDB-Tk revealed four HQ MAGs as known species like Dermacoccus abyssi, Sphingomonas aquatilis, Acinetobacter baumannii, and Burkholderia cenocepacia. The remaining six HQ MAGs were classified as Comamonas, Arthrobacter, Noviherbaspirillum, Acidovorax, Oxalicibacterium, and Bordetella and designated as novel genomes by the validation of digital DNA-DNA hybridization (dDDH). Phylogenetic analysis and further pangenome analysis across the phylogenetic groups revealed a similar pattern with a high proportion of cloud genes. We further analysed the functional potential of these MAGs and closely related genomes using COG. The comparative functional genomics revealed that novel genomes are highly versatile, potentially reflecting adaptations to the coal environment. BlastKOALA was used to conduct a detailed analysis of the metabolic pathways associated with the MAGs. This study highlights the comparative genomic analysis of novel coal genomes with their closely related genomes to understand the evolutionary relationships and functional properties.}, }
@article {pmid39485064, year = {2024}, author = {Feng, L and Guo, Z and Yao, W and Mu, G and Zhu, X}, title = {Metagenomics and Untargeted Metabolomics Analysis Revealed the Probiotic and Postbiotic Derived from Lactiplantibacillus plantarum DPUL F232 Alleviate Whey Protein-Induced Food Allergy by Reshaping Gut Microbiota and Regulating Key Metabolites.}, journal = {Journal of agricultural and food chemistry}, volume = {72}, number = {45}, pages = {25436-25448}, doi = {10.1021/acs.jafc.4c08203}, pmid = {39485064}, issn = {1520-5118}, mesh = {Animals ; *Probiotics/pharmacology/administration &amp; dosage ; *Gastrointestinal Microbiome/drug effects ; Rats ; *Metabolomics ; *Whey Proteins/metabolism ; *Metagenomics ; *Rats, Sprague-Dawley ; Male ; Humans ; Immunoglobulin E/immunology/blood ; Food Hypersensitivity/immunology ; Lactobacillus plantarum ; Female ; }, abstract = {Postbiotics have emerged as a promising alternative to probiotics. However, it remains unclear whether postbiotics can exert regulatory effects on intestinal flora and metabolism as probiotics. Thus, we investigated the effects of probiotic and postbiotic in rats with whey protein-induced food allergy, which demonstrated that postbiotic intervention effectively alleviated allergy symptoms, reduced serum immunoglobulin E (IgE) and mast cell protease-1 (mMCP-1) levels, and regulated the type helper 1 cell/2 cell (Th1/Th2) balance in both serum and spleen. Metagenomic analysis revealed that postbiotics induced more significant changes in intestinal flora. Untargeted metabolomics analysis showed that both probiotics and postbiotics significantly up-regulated various differential metabolites, which were negatively correlated with immune indices, including malvidin-3-glucoside, 3,4-dihydroxymandelic acid, nicotinamide, triterpenoids, pirbuterol, and 4-hydroxybenzoic acid. This study confirms that postbiotics can alleviate food allergies and regulate intestinal flora and metabolites, which provides a valuable reference for the use of postbiotics in mitigating allergic diseases through gut microbiota and metabolite modulation.}, }
@article {pmid39482414, year = {2024}, author = {Virachabadoss, VRA and Appavoo, MS and Paramasivam, KS and Karthikeyan, SV and Govindan, D}, title = {The addition of humic acid into soil contaminated with microplastics enhanced the growth of black gram (Vigna mungo L. Hepper) and modified the rhizosphere microbial community.}, journal = {Environmental science and pollution research international}, volume = {31}, number = {54}, pages = {63343-63359}, pmid = {39482414}, issn = {1614-7499}, mesh = {*Humic Substances ; *Rhizosphere ; *Soil Pollutants ; *Soil Microbiology ; *Vigna/drug effects/growth &amp; development ; *Microplastics ; *Soil/chemistry ; Microbiota/drug effects ; }, abstract = {Microplastics have polluted agricultural soils, posing a substantial risk to crop productivity. Moreover, the presence of microplastic pollution has caused a disturbance in the composition of the microbial community in the soil surrounding plant roots, therefore impacting the growth of beneficial bacteria. A study was conducted to examine if humic acid (HA) can counteract the harmful effects of microplastics (MPs) on the growth of black gram crops and the composition of the rhizosphere soil microbial community, to reduce the negative impacts of microplastics on these microorganisms and crops. The research was carried out using mud pots and the plastic utilized for the experiment consisted of 60% high-density polyethylene (HDPE) and 40% polypropylene (PP). The soil was enriched with lignite-based potassium humate, which had a pH range of 8.0-9.5 and with 65% humic acid. The experiment consisted of six treatments: T1, which served as the control without HA and MP; T2, which involved the use of HA at a concentration of 0.15% w/w; T3, which involved the use of MP at a concentration of 0.2% w/w; T4, which involved the use of MP at a concentration of 0.4% w/w; T5, which involved the combination of HA at a concentration of 0.15% w/w and MP at a concentration of 0.2% w/w; and T6, which involved the combination of HA at a concentration of 0.15% w/w and MP at a concentration of 0.4% w/w. The plant growth characteristics, including germination percentage, nodule number, and chlorophyll content, were measured. In addition, the DNA obtained from the rhizosphere soil was analyzed using metagenomics techniques to investigate the organization of the microbial population. Seedlings in soil polluted with MP exhibited delayed germination compared to seedlings in uncontaminated soil. Following 60 days of growth, the soil samples treated with T5 (0.2% MP and 0.15% HA w/w) had the highest population of bacteria and rhizobium, with counts 5.58 ± 0.02 and 4.90 ± 0.02 CFU g[-1] soil. The plants cultivated in T5 had the most elevated chlorophyll-a concentration (1.340 ± 0.06 mg g[-1]), and chlorophyll-b concentration (0.62 ± 0.02 mg g[-1]) while those cultivated in T3 displayed the lowest concentration of chlorophyll-a (0.59 ± 0.02 mg g[-1]) and chlorophyll-b (0.21 ± 0.04 mg g[-1]). Within the phylum, Proteobacteria had the highest prevalence in all treatments. However, when the soil was polluted with MPs, its relative abundance was reduced by 8.4% compared to the control treatment (T1). Conversely, treatment T5 had a 3.76% rise in relative abundance when compared to treatment T3. The predominant taxa found in soil polluted with MP were Sphingomonas and Bacillus, accounting for 19.3% of the total. Sphingomonas was the predominant genus (21.2%) in soil polluted with MP and supplemented with humic acid. Humic acid can be used as a soil amendment to mitigate the negative effects of MPs and enhance their positive advantages. Research has demonstrated that incorporating humic acid into soil is a viable method for maintaining the long-term integrity of soil's physical, chemical, and biological characteristics.}, }
@article {pmid39481794, year = {2024}, author = {Li, X and Li, Y and Wang, Y and Liu, Y and Riaz, L and Wang, Q and Zeng, X and Qin, Z and Irfan, M and Yang, Q}, title = {Methodology comparison of environmental sediment fungal community analysis.}, journal = {Environmental research}, volume = {263}, number = {Pt 3}, pages = {120260}, doi = {10.1016/j.envres.2024.120260}, pmid = {39481794}, issn = {1096-0953}, mesh = {*Geologic Sediments/microbiology ; *Fungi/genetics/isolation &amp; purification/classification ; *RNA, Ribosomal, 18S/genetics ; *High-Throughput Nucleotide Sequencing ; DNA, Fungal/analysis ; DNA, Ribosomal Spacer/genetics ; Mycobiome ; Rivers/microbiology ; }, abstract = {Fungi play important roles in ecosystems. Analyzing fungal communities in environments has long been a challenge due to the large difference in compositions retrieved using different methods or sequencing regions, obscuring the true abundance and species information. Our study aimed to compare and determine more accurate approach for evaluating fungal populations in river sediment. To achieve this, different primer sets in the internal transcribed spacer (ITS) (ITS5/ITS1R, ITS1F/ITS2), 18S rRNA gene (0817F/1196R) for High-throughput sequencing (HTS), metagenomic shotgun sequencing (MS) directly from environmental samples, and HTS using ITS primers for the fungal samples collected from plate cultivation were used to characterize the fungal communities. We calculated diversity index and used FungalTraits to analyze methods preferences for fungal species. The study revealed that when analyzing the fungal species directly from environmental samples, amplification and sequencing of ITS region demonstrated more accuracy than MS and 18S rRNA gene sequencing methods, but displayed significant primer preference. Over 30 % fungal species from HTS after plate cultivation were not present in HTS from the environmental samples. NMDS analysis demonstrated significant disparities in species diversity among different methods, suggesting potential complementarity between them. Over 85% species identified by HTS using ITS primers belonged to filamentous fungi, while the MS mostly identified yeast (62%). Therefore, to get more accurate fungal community information in sediment, multiple methods were recommended by using cultivation, molecular biological methods dependent on PCR techniques like ITS1F/ITS2 primer for HTS and PCR independent method such as metagenomic shotgun sequencing techniques.}, }
@article {pmid39478626, year = {2024}, author = {Favero, F and Re, A and Dason, MS and Gravina, T and Gagliardi, M and Mellai, M and Corazzari, M and Corà, D}, title = {Characterization of gut microbiota dynamics in an Alzheimer's disease mouse model through clade-specific marker-based analysis of shotgun metagenomic data.}, journal = {Biology direct}, volume = {19}, number = {1}, pages = {100}, pmid = {39478626}, issn = {1745-6150}, mesh = {Animals ; *Alzheimer Disease/microbiology/genetics ; *Gastrointestinal Microbiome ; Mice ; *Metagenomics/methods ; *Disease Models, Animal ; Mice, Transgenic ; Feces/microbiology ; Metagenome ; }, abstract = {Alzheimer's disease (AD) is a complex neurodegenerative disorder significantly impairing cognitive faculties, memory, and physical abilities. To characterize the modulation of the gut microbiota in an in vivo AD model, we performed shotgun metagenomics sequencing on 3xTgAD mice at key time points (i.e., 2, 6, and 12 months) of AD progression. Fecal samples from both 3xTgAD and wild-type mice were collected, DNA extracted, and sequenced. Quantitative taxon abundance assessment using MetaPhlAn 4 ensured precise microbial community representation. The analysis focused on species-level genome bins (SGBs) including both known and unknown SGBs (kSGBs and uSGBs, respectively) and also comprised higher taxonomic categories such as family-level genome bins (FGBs), class-level genome bins (CGBs), and order-level genome bins (OGBs). Our bioinformatic results pinpointed the presence of extensive gut microbial diversity in AD mice and showed that the largest proportion of AD- and aging-associated microbiome changes in 3xTgAD mice concern SGBs that belong to the Bacteroidota and Firmicutes phyla, along with a large set of uncharacterized SGBs. Our findings emphasize the need for further advanced bioinformatic studies for accurate classification and functional analysis of these elusive microbial species in relation to their potential bridging role in the gut-brain axis and AD pathogenesis.}, }
@article {pmid39478562, year = {2024}, author = {Lai, X and Liu, S and Miao, J and Shen, R and Wang, Z and Zhang, Z and Gong, H and Li, M and Pan, Y and Wang, Q}, title = {Eubacterium siraeum suppresses fat deposition via decreasing the tyrosine-mediated PI3K/AKT signaling pathway in high-fat diet-induced obesity.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {223}, pmid = {39478562}, issn = {2049-2618}, mesh = {Animals ; Male ; Mice ; Diet, High-Fat/adverse effects ; *Eubacterium/metabolism ; *Gastrointestinal Microbiome ; *Obesity/microbiology/metabolism ; Phosphatidylinositol 3-Kinases/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; *Signal Transduction ; Swine ; }, abstract = {BACKGROUND: Obesity in humans can lead to chronic diseases such as diabetes and cardiovascular disease. Similarly, subcutaneous fat (SCF) in pigs affects feed utilization, and excessive SCF can reduce the feed efficiency of pigs. Therefore, identifying factors that suppress fat deposition is particularly important. Numerous studies have implicated the gut microbiome in pigs' fat deposition, but research into its suppression remains scarce. The Lulai black pig (LL) is a hybrid breed derived from the Laiwu pig (LW) and the Yorkshire pig, with lower levels of SCF compared to the LW. In this study, we focused on these breeds to identify microbiota that regulate fat deposition. The key questions were: Which microbial populations reduce fat in LL pigs compared to LW pigs, and what is the underlying regulatory mechanism?<br><br>RESULTS: In this study, we identified four different microbial strains, Eubacterium siraeum, Treponema bryantii, Clostridium sp. CAG:413, and Jeotgalibaca dankookensis, prevalent in both LW and LL pigs. Blood metabolome analysis revealed 49 differential metabolites, including tanshinone IIA and royal jelly acid, known for their anti-adipogenic properties. E. siraeum was strongly correlated with these metabolites, and its genes and metabolites were enriched in pathways linked to fatty acid degradation, glycerophospholipid, and glycerolipid metabolism. In vivo mouse experiments confirmed that E. siraeum metabolites curb weight gain, reduce SCF adipocyte size, increase the number of brown adipocytes, and regulate leptin, IL-6, and insulin secretion. Finally, we found that one important pathway through which E. siraeum inhibits fat deposition is by suppressing the phosphorylation of key proteins in the PI3K/AKT signaling pathway through the reduction of tyrosine.<br><br>CONCLUSIONS: We compared LW and LL pigs using fecal metagenomics, metabolomics, and blood metabolomics, identifying E. siraeum as a strain linked to fat deposition. Oral administration experiments in mice demonstrated that E. siraeum effectively inhibits fat accumulation, primarily through the suppression of the PI3K/AKT signaling pathway, a critical regulator of lipid metabolism. These findings provide a valuable theoretical basis for improving pork quality and offer insights relevant to the study of human obesity and related chronic metabolic diseases. Video Abstract.}, }
@article {pmid39478083, year = {2024}, author = {Mehlferber, EC and Arnault, G and Joshi, B and Partida-Martinez, LP and Patras, KA and Simonin, M and Koskella, B}, title = {A cross-systems primer for synthetic microbial communities.}, journal = {Nature microbiology}, volume = {9}, number = {11}, pages = {2765-2773}, pmid = {39478083}, issn = {2058-5276}, support = {U19 AI157981/AI/NIAID NIH HHS/United States ; DBI-2209151//National Science Foundation (NSF)/ ; 1838299//NSF | BIO | Division of Integrative Organismal Systems (IOS)/ ; }, mesh = {*Microbiota ; Synthetic Biology/methods ; Microbial Consortia ; Humans ; Microbial Interactions ; }, abstract = {The design and use of synthetic communities, or SynComs, is one of the most promising strategies for disentangling the complex interactions within microbial communities, and between these communities and their hosts. Compared to natural communities, these simplified consortia provide the opportunity to study ecological interactions at tractable scales, as well as facilitating reproducibility and fostering interdisciplinary science. However, the effective implementation of the SynCom approach requires several important considerations regarding the development and application of these model systems. There are also emerging ethical considerations when both designing and deploying SynComs in clinical, agricultural or environmental settings. Here we outline current best practices in developing, implementing and evaluating SynComs across different systems, including a focus on important ethical considerations for SynCom research.}, }
@article {pmid39477611, year = {2024}, author = {Hua, Q and Chi, X and Wang, Y and Xu, B}, title = {Biological damage of monocrotaline on the brain and intestinal tissues of Apis mellifera.}, journal = {Pesticide biochemistry and physiology}, volume = {205}, number = {}, pages = {106158}, doi = {10.1016/j.pestbp.2024.106158}, pmid = {39477611}, issn = {1095-9939}, mesh = {Animals ; Bees/drug effects ; *Brain/drug effects/metabolism ; *Monocrotaline/toxicity ; *Intestines/drug effects ; Oxidative Stress/drug effects ; Apoptosis/drug effects ; Gastrointestinal Microbiome/drug effects ; Antioxidants/metabolism ; }, abstract = {Monocrotaline (MCT) is a toxic alkaloid present in plants, posing a threat to animals in terrestrial ecosystems. However, little is known about its potential impacts on pollinating insects. Here, we report the effects of of MCT on the brains and intestines of foraging honeybees (Apis mellifera). MCT exposure resulted in a reduction in head weight and swelling of the abdomen in honeybees. Additionally, MCT exposure caused morphological damage to the brain, characterized by decreased antioxidant capacity and increased apoptosis, along with intestinal tissue damage that was accompanied by increased antioxidant capacity and apoptosis. Moreover, MCT altered the core gut microbial community structure in honeybees and increased the expression of antimicrobial peptide (AMP) genes in the midgut. These findings indicate that exposure to MCT activates the immune response in the honeybee gut, while the brain does not exhibit an immune response but instead experiences oxidative stress. This study provides a resource for future research exploring interactions between MCT and other insects, and can help deepen our understanding of MCT's potential impacts in ecosystems.}, }
@article {pmid39477048, year = {2024}, author = {Vinayagam, S and Sekar, K and Rajendran, D and Meenakshisundaram, K and Panigrahi, A and Arumugam, DK and Bhowmick, IP and Sattu, K}, title = {The genetic composition of Anopheles mosquitoes and the diverse population of gut-microbiota within the Anopheles subpictus and Anopheles vagus mosquitoes in Tamil Nadu, India.}, journal = {Acta tropica}, volume = {260}, number = {}, pages = {107439}, doi = {10.1016/j.actatropica.2024.107439}, pmid = {39477048}, issn = {1873-6254}, mesh = {Animals ; *Anopheles/microbiology/genetics ; India ; *Phylogeny ; *Gastrointestinal Microbiome ; Mosquito Vectors/microbiology/genetics ; Bacteria/classification/genetics/isolation &amp; purification ; Sequence Analysis, DNA ; Female ; DNA, Ribosomal Spacer/genetics ; }, abstract = {In recent days, in tropical and subtropical regions, secondary vectors of Anopheles mosquitoes are becoming more important in transmitting diseases to humans as primary vectors. Various molecular techniques have separated closely related Anopheles subpictus and Anopheles vagus mosquitoes based on their diversity with other mosquito species. Despite their widespread distribution, the An. subpictus and An. vagus mosquitoes, which carry Plasmodium in their salivary glands, were not considered primary malaria vectors in India. An. vagus mosquitoes are zoophilic and physically similar to An. subpictus. We intend to identify An. subpictus and An. vagus mosquito's sister species based on their Interspaced Transcribed Region-2 (ITS2). We isolated the midgut gDNA from each mosquito and used ITS2-PCR and Sanger sequencing to characterize the mosquito species. BioEdit software aligned the sequences, and MEGA7 built a phylogenetic tree from them. According to this study, the information gathered from these mosquito samples fits the An. subpictus species A form and the An. vagus Indian form. Furthermore, gut microbiome plays an important role in providing nutrients, immunity, and food processing, whereas mosquitoes' midgut microbiota changes their hosts and spreads illnesses. So, we used the Illumina sequencer to look at the gut microbiome diversity of An. subpictus and An. vagus mosquitoes using 16S rRNA-based metagenomic sequencing. Both mosquito species had an abundant phylum of Pseudomonadota (Proteobacteria), Bacillota, Bacteroidota, and Actinomycetota in their gut microbiomes. Notably, both mosquito species had the genus Serratia in their gut. In the subpictus midgut, the genus of Haematosprillum bacteria was dominant, whereas in the vagus mosquito, the genus of Salmonella was dominant. Notably, current research has observed the Sodalis spp. Bacterial genus for the first time.}, }
@article {pmid39476326, year = {2024}, author = {Khan, FZA and Ahmed, S and Powell, AM}, title = {Vaginal Microbiome and the Risk of Preterm Birth in Women Living With HIV: A Scoping Review.}, journal = {American journal of reproductive immunology (New York, N.Y. : 1989)}, volume = {92}, number = {5}, pages = {e70011}, doi = {10.1111/aji.70011}, pmid = {39476326}, issn = {1600-0897}, support = {K23AI155296//National Institute of Allergy and Infectious Diseases/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology ; *HIV Infections/immunology/complications/microbiology ; *Premature Birth/microbiology ; *Microbiota ; Pregnancy ; Pregnancy Complications, Infectious/microbiology/immunology ; }, abstract = {There are sparse data on the role of the vaginal microbiome (VMB) in pregnancy among pregnant women living with HIV (PWLWH) and its association with spontaneous preterm birth (sPTB). We conducted a scoping review to assess associations between vaginal microbiota and sPTB among PWLWH. Three studies were included, representing a total of 180 PWLWH out of 652 total pregnancies. All studies used modern DNA sequencing methods (16S rRNA amplification, metagenomics, or metatranscriptomics). PWLWH had higher VMB richness and diversity compared to HIV-uninfected pregnant women and higher sPTB rates in two of three studies. A higher proportion of sPTB among PWLWH was observed in those with Lactobacillus-deficient, anaerobe-dominant vaginal microbiota. In two of three studies, higher concentrations of vaginal inflammation markers were associated with increased VMB richness and diversity. HIV status was independently associated with sPTB. It is unclear if increased vaginal microbial diversity among PWLWH or increased vaginal inflammation contributes more to PTB, but HIV does appear to alter the VMB in pregnant individuals and may also affect PTB rates in microbiome-independent pathways. Given the limited number of studies, heterogeneity in sample size, sample collection methods, and inconsistent results it is difficult to causally link HIV, VMB, inflammatory cytokines, and sPTB.}, }
@article {pmid39475924, year = {2024}, author = {Liu, S and Ren, J and Li, J and Yu, D and Xu, H and He, F and Li, N and Zou, L and Cao, Z and Wen, J}, title = {Characterizing the gut microbiome of diarrheal mink under farmed conditions: A metagenomic analysis.}, journal = {PloS one}, volume = {19}, number = {10}, pages = {e0312821}, pmid = {39475924}, issn = {1932-6203}, mesh = {Animals ; *Mink/microbiology ; *Gastrointestinal Microbiome/genetics ; *Diarrhea/microbiology/veterinary ; *Metagenomics/methods ; Metagenome ; Bacteria/genetics/classification/isolation &amp; purification ; Bacteroidetes/genetics/isolation &amp; purification ; Farms ; Feces/microbiology ; }, abstract = {This study aimed to comprehensively characterize the gut microbiota in diarrheal mink. We conducted Shotgun metagenomic sequencing on samples from five groups of diarrheal mink and five groups of healthy mink. The microbiota α-diversity and Kyoto Encyclopedia of Genes and Genomes (KEGG) orthology did not show significant differences between the groups. However, significant differences were observed in microbiota β-diversity and the function of carbohydrate-active enzymes (CAZymes) between diarrheal and healthy mink. Specifically, The relative abundance of Firmicutes was lower, whereas that of Bacteroidetes was higher in diarrheal mink. Fusobacteria were enriched as invasive bacteria in the gut of diarrheal mink compared with healthy mink. In addition, Escherichia albertii was identified as a new bacterium in diarrheal mink. Regarding functions, nicotinate and nicotinamide metabolism and glycoside hydrolases 2 (GH2) family were the enhanced KEGG orthology and CAZymes in diarrheal mink. Furthermore, the diversity and number of antibiotic-resistant genes were significantly higher in the diarrheal mink group than in the healthy group. These findings enhance our understanding of the gut microbiota of adult mink and may lead to new approaches to the diagnosis and treatment of mink diarrhea.}, }
@article {pmid39475341, year = {2024}, author = {Sánchez-Terrón, G and Martínez, R and Freire, MJ and Molina-Infante, J and Estévez, M}, title = {Gastrointestinal fate of proteins from commercial plant-based meat analogs: Silent passage through the stomach, oxidative stress in intestine, and gut dysbiosis in Wistar rats.}, journal = {Journal of food science}, volume = {89}, number = {12}, pages = {10294-10316}, pmid = {39475341}, issn = {1750-3841}, support = {//Ministerio de Ciencia&#xa0;e Innovaci&#xf3;n/ ; //Junta de Extremadura/ ; //Junta de Andaluc&#xed;a/ ; }, mesh = {Animals ; *Rats, Wistar ; Rats ; *Oxidative Stress ; *Gastrointestinal Microbiome/physiology ; Male ; *Dysbiosis ; Gastrointestinal Tract/metabolism/microbiology ; Dietary Proteins/metabolism ; Stomach/microbiology ; Digestion ; Meat Substitutes ; }, abstract = {Plant-based meat analogs (PBMAs) are common ultra-processed foods (UPFs) included in the vegan/vegetarian diets as presumed healthy alternatives to meat and meat products. However, such health claims need to be supported by scientific evidence. To gain further insight into this topic, two commercial UPFs typically sold as meat analogs, namely, seitan (S) and tofu (T), were included in a cereal-based chow and provided to Wistar rats for 10 weeks. A group of animals had, simultaneously, an isocaloric and isoprotein experimental diet formulated with cooked beef (B). In all cases, experimental chows (∼4 kcal/g feed) had their basal protein concentration increased from 14% to 30% using proteins from S, T, or B. Upon slaughter, in vivo protein digestibility was assessed, and the entire gastrointestinal tract (digests and tissues) was analyzed for markers of oxidative stress and untargeted metabolomics. Metagenomics was also applied to assess the variation of microbiota composition as affected by dietary protein. Diets based on PBMAs showed lower protein digestibility than those containing meat and promoted an intense luminal glycoxidative stress and an inflammatory intestinal response. The fermentation of undigested oxidized proteins from T in the colon of Wistar rats likely led to formation of mutagenic metabolites such as p-cresol. The presence of these compounds in the animal models raises concerns about the potential effects of full replacement of meat by certain PBMAs in the diet. Therefore, future research might target on translational human studies to shed light on these findings.}, }
@article {pmid39474927, year = {2024}, author = {Milesi, VP}, title = {Redox Gradient Shapes the Chemical Composition of Peatland Microbial Communities.}, journal = {Geobiology}, volume = {22}, number = {6}, pages = {e70001}, doi = {10.1111/gbi.70001}, pmid = {39474927}, issn = {1472-4669}, support = {//Agence Nationale de la Recherche/ ; }, mesh = {*Oxidation-Reduction ; *Soil Microbiology ; *Soil/chemistry ; *Microbiota ; Bacteria/classification/genetics/metabolism ; Carbon/metabolism/analysis ; }, abstract = {The response of soil carbon to climate change and anthropogenic forcing depends on the relationship between the physicochemical variables of the environment and microbial communities. In anoxic soils that store large amounts of organic carbon, it can be hypothesized that the low amount of catabolic energy available leads microbial organisms to minimize the energy costs of biosynthesis, which may shape the composition of microbial communities. To test this hypothesis, thermodynamic modeling was used to assess the link between redox gradients in the ombrotrophic peatland of the Marcell Experimental Forest (Minnesota, USA) and the chemical and taxonomic composition of microbial communities. The average amino acid composition of community-level proteins, called hereafter model proteins, was calculated from shotgun metagenomic sequencing. The carbon oxidation state of model proteins decreases linearly from -0.14 at 10 cm depth to -0.17 at 150 cm depth. Calculating equilibrium activities of model proteins for a wide range of chemical conditions allows identification of the redox potential of maximum chemical activity. Consistent with redox measurements across peat soils, this model Eh decreases logarithmically from an average value of 300 mV at 10 cm depth, close to the stability domain of goethite relative to Fe[2+], to an average value of -200 mV at 150 cm, within the stability domain of CH4 relative to CO2. The correlation identified between the taxonomic abundance and the carbon oxidation state of model proteins enables predicting the evolution of taxonomic abundance as a function of model Eh. The model taxonomic abundance is consistent with the measured gene and taxonomic abundance, which evolves from aerobic bacteria at the surface including Acidobacteria, Proteobacteria, and Verrumicrobia, to anaerobes at depth dominated by Crenarchaeota. These results indicate that the thermodynamic forcing imposed by redox gradient across peat soils shapes both the chemical and taxonomic composition of microbial communities. By providing a mechanistic understanding of the relationship between microbial community and environmental conditions, this work sheds new light on the mechanisms that govern soil microbial life and opens up prospects for predicting geochemical and microbial evolution in changing environments.}, }
@article {pmid39473051, year = {2024}, author = {Wang, Y and Chen, J and Ni, Y and Liu, Y and Gao, X and Tse, MA and Panagiotou, G and Xu, A}, title = {Exercise-changed gut mycobiome as a potential contributor to metabolic benefits in diabetes prevention: an integrative multi-omics study.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2416928}, pmid = {39473051}, issn = {1949-0984}, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; *Exercise ; Middle Aged ; *Mycobiome ; *Fungi/classification/genetics/isolation &amp; purification ; *Feces/microbiology ; Proteomics ; Prediabetic State/microbiology/metabolism ; Metabolomics ; Bacteria/classification/isolation &amp; purification/genetics/metabolism ; Adult ; Diabetes Mellitus, Type 2/microbiology/prevention &amp; control ; Metagenomics ; Multiomics ; }, abstract = {BACKGROUND: The importance of gut microbes in mediating the benefits of lifestyle intervention is increasingly recognized. However, compared to the bacterial microbiome, the role of intestinal fungi in exercise remains elusive. With our established randomized controlled trial of exercise intervention in Chinese males with prediabetes (n = 39, ClinicalTrials.gov:NCT03240978), we investigated the dynamics of human gut mycobiome and further interrogated their associations with exercise-elicited outcomes using multi-omics approaches.<br><br>METHODS: Clinical variations and biological samples were collected before and after training. Fecal fungal composition was analyzed using the internal transcribed spacer 2 (ITS2) sequencing and integrated with paired shotgun metagenomics, untargeted metabolomics, and Olink proteomics.<br><br>RESULTS: Twelve&#x2009;weeks of exercise training profoundly promoted fungal ecological diversity and intrakingdom connection. We further identified exercise-responsive genera with potential metabolic benefits, including Verticillium, Sarocladium, and Ceratocystis. Using multi-omics approaches, we elucidated comprehensive associations between changes in gut mycobiome and exercise-shaped metabolic phenotypes, bacterial microbiome, and circulating metabolomics and proteomics profiles. Furthermore, a machine-learning algorithm built using baseline microbial signatures and clinical characteristics predicted exercise responsiveness in improvements of insulin sensitivity, with an area under the receiver operating characteristic (AUROC) of 0.91 (95% CI: 0.85-0.97) in the discovery cohort and of 0.79 (95% CI: 0.74-0.86) in the independent validation cohort (n&#x2009;=&#x2009;30).<br><br>CONCLUSIONS: Our findings suggest that intense exercise training significantly remodels the human fungal microbiome composition. Changes in gut fungal composition are associated with the metabolic benefits of exercise, indicating gut mycobiome is a possible molecular transducer of exercise. Moreover, baseline gut fungal signatures predict exercise responsiveness for diabetes prevention, highlighting that targeting the gut mycobiome emerges as a prospective strategy in tailoring personalized training for diabetes prevention.}, }
@article {pmid39472959, year = {2024}, author = {Martin-Cuadrado, AB and Rubio-Portillo, E and Rosselló, F and Antón, J}, title = {The coral Oculina patagonica holobiont and its response to confinement, temperature, and Vibrio infections.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {222}, pmid = {39472959}, issn = {2049-2618}, mesh = {*Anthozoa/microbiology ; Animals ; *Coral Reefs ; *Microbiota ; *Vibrio/genetics/classification/physiology/isolation &amp; purification ; Symbiosis ; Temperature ; Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Rhodobacteraceae/genetics/classification/isolation &amp; purification/physiology ; Fungi/classification/genetics/isolation &amp; purification ; Vibrionaceae/genetics/classification/isolation &amp; purification ; Vibrio Infections/microbiology ; Climate Change ; }, abstract = {BACKGROUND: Extensive research on the diversity and functional roles of the microorganisms associated with reef-building corals has been promoted as a consequence of the rapid global decline of coral reefs attributed to climate change. Several studies have highlighted the importance of coral-associated algae (Symbiodinium) and bacteria and their potential roles in promoting coral host fitness and survival. However, the complex coral holobiont extends beyond these components to encompass other entities such as protists, fungi, and viruses. While each constituent has been individually investigated in corals, a comprehensive understanding of their collective roles is imperative for a holistic comprehension of coral health and resilience.<br><br>RESULTS: The metagenomic analysis of the microbiome of the coral Oculina patagonica has revealed that fungi of the genera Aspergillus, Fusarium, and Rhizofagus together with the prokaryotic genera Streptomyces, Pseudomonas, and Bacillus were abundant members of the coral holobiont. This study also assessed changes in microeukaryotic, prokaryotic, and viral communities under three stress conditions: aquaria confinement, heat stress, and Vibrio infections. In general, stress conditions led to an increase in Rhodobacteraceae, Flavobacteraceae, and Vibrionaceae families, accompanied by a decrease in Streptomycetaceae. Concurrently, there was a significant decline in both the abundance and richness of microeukaryotic species and a reduction in genes associated with antimicrobial compound production by the coral itself, as well as by Symbiodinium and fungi.<br><br>CONCLUSION: Our findings suggest that the interplay between microeukaryotic and prokaryotic components of the coral holobiont may be disrupted by stress conditions, such as confinement, increase of seawater temperature, or Vibrio infection, leading to a dysbiosis in the global microbial community that may increase coral susceptibility to diseases. Further, microeukaryotic community seems to exert influence on the prokaryotic community dynamics, possibly through predation or the production of secondary metabolites with anti-bacterial activity. Video Abstract.}, }
@article {pmid39471749, year = {2024}, author = {Liu, X and Lu, B and Tang, H and Jia, X and Zhou, Q and Zeng, Y and Gao, X and Chen, M and Xu, Y and Wang, M and Tan, B and Li, J}, title = {Gut microbiome metabolites, molecular mimicry, and species-level variation drive long-term efficacy and adverse event outcomes in lung cancer survivors.}, journal = {EBioMedicine}, volume = {109}, number = {}, pages = {105427}, pmid = {39471749}, issn = {2352-3964}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Lung Neoplasms/drug therapy/immunology/pathology ; Male ; Female ; Middle Aged ; Aged ; Cancer Survivors ; Metabolome ; Metagenome ; Metagenomics/methods ; Immune Checkpoint Inhibitors/therapeutic use/adverse effects ; Treatment Outcome ; }, abstract = {BACKGROUND: The influence of the gut microbiota on long-term immune checkpoint inhibitor (ICI) efficacy and immune-related adverse events (irAEs) is poorly understood, as are the underlying mechanisms.<br><br>METHODS: We performed gut metagenome and metabolome sequencing of gut microbiotas from patients with lung cancer initially treated with anti-PD-1/PD-L1 therapy and explored the underlying mechanisms mediating long-term (median follow-up 1167 days) ICI responses and immune-related adverse events (irAEs). Results were validated in external, publicly-available datasets (Routy, Lee, and McCulloch cohorts).<br><br>FINDINGS: The ICI benefit group was enriched for propionate (P&#xa0;=&#xa0;0.01) and butyrate/isobutyrate (P&#xa0;=&#xa0;0.12) compared with the resistance group, which was validated in the McCulloch cohort (propionate P&#xa0;<&#xa0;0.001, butyrate/isobutyrate P&#xa0;=&#xa0;0.002). The acetyl-CoA pathway (P&#xa0;=&#xa0;0.02) in beneficial species mainly mediated butyrate production. Microbiota sequences from irAE patients aligned with antigenic epitopes found in autoimmune diseases. Microbiotas of responsive patients contained more lung cancer-related antigens (P&#xa0;=&#xa0;0.07), which was validated in the Routy cohort (P&#xa0;=&#xa0;0.02). Escherichia coli and SGB15342 of Faecalibacterium prausnitzii showed strain-level variations corresponding to clinical phenotypes. Metabolome validation reviewed more abundant acetic acid (P&#xa0;=&#xa0;0.03), propionic acid (P&#xa0;=&#xa0;0.09), and butyric acid (P&#xa0;=&#xa0;0.02) in the benefit group than the resistance group, and patients with higher acetic, propionic, and butyric acid levels had a longer progression-free survival and lower risk of tumor progression after adjusting for histopathological subtype and stage (P&#xa0;<&#xa0;0.05).<br><br>INTERPRETATION: Long-term ICI survivors have coevolved a compact microbial community with high butyrate production, and molecular mimicry of autoimmune and tumor antigens by microbiota contribute to outcomes. These results not only characterize the gut microbiotas of patients who benefit long term from ICIs but pave the way for "smart" fecal microbiota transplantation. Registered in the Chinese Clinical Trial Registry (ChiCTR2000032088).<br><br>FUNDING: This work was supported by Beijing Natural Science Foundation (7232110), National High Level Hospital Clinical Research Funding (2022-PUMCH-A-072, 2023-PUMCH-C-054), CAMS Innovation Fund for Medical Sciences (CIFMS) (2022-I2M-C&amp;T-B-010).}, }
@article {pmid39470619, year = {2025}, author = {Liu, X and Luo, Y and Chen, X and Wu, M and Xu, X and Tian, J and Gao, Y and Zhu, J and Wang, Z and Zhou, Y and Zhang, Y and Wang, X and Li, W and Lu, Q and Yao, X}, title = {Fecal microbiota transplantation against moderate-to-severe atopic dermatitis: A randomized, double-blind controlled explorer trial.}, journal = {Allergy}, volume = {80}, number = {5}, pages = {1377-1388}, doi = {10.1111/all.16372}, pmid = {39470619}, issn = {1398-9995}, support = {//Nanjing Incubation Program for National Clinical Research Center/ ; //National Key Research and Development Program of China/ ; //CAMS Innovation Fund for Medical Sciences/ ; //Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences/ ; //National Natural Science Foundation of China/ ; }, mesh = {Humans ; *Dermatitis, Atopic/therapy/diagnosis/immunology ; *Fecal Microbiota Transplantation/methods/adverse effects ; Male ; Adult ; Female ; Double-Blind Method ; Severity of Illness Index ; Treatment Outcome ; Middle Aged ; Gastrointestinal Microbiome ; Young Adult ; }, abstract = {BACKGROUND: Fecal microbiota transplantation (FMT) is a novel treatment for inflammatory diseases. Herein, we assess its safety, efficacy, and immunological impact in patients with moderate-to-severe atopic dermatitis (AD).<br><br>METHODS: In this randomized, double-blind, placebo-controlled clinical trial, we performed the efficacy and safety assessment of FMT for moderate-to-severe adult patients with AD. All patients received FMT or placebo once a week for 3&#x2009;weeks, in addition to their standard background treatments. Patients underwent disease severity assessments at weeks 0, 1, 2, 4, 8, 12, and 16, and blood and fecal samples were collected for immunologic analysis and metagenomic shotgun sequencing, respectively. Safety was monitored throughout the trial.<br><br>RESULTS: Improvements in eczema area and severity index (EASI) scores and percentage of patients achieving EASI 50 (50% reduction in EASI score) were greater in patients treated with FMT than in placebo-treated patients. No serious adverse reactions occurred during the trial. FMT treatment decreased the Th2 and Th17 cell proportions among the peripheral blood mononuclear cells, and the levels of TNF-&#x3b1;, and total IgE in serum. By contrast, the expression levels of IL-12p70 and perforin on NK cells were increased. Moreover, FMT altered the abundance of species and functional pathways of the gut microbiota in the patients, especially the abundance of Megamonas funiformis and the pathway for 1,4-dihydroxy-6-naphthoate biosynthesis II.<br><br>CONCLUSION: FMT was a safe and effective therapy in moderate-to-severe adult patients with AD; the treatment changed the gut microbiota compositions and functions.}, }
@article {pmid39470190, year = {2024}, author = {Toyomane, K and Kimura, Y and Fukagawa, T and Yamagishi, T and Watanabe, K and Akutsu, T and Asahi, A and Kubota, S and Sekiguchi, K}, title = {Metagenomic sequencing of CRISPRs as a new marker to aid in personal identification with low-biomass samples.}, journal = {mSystems}, volume = {9}, number = {11}, pages = {e0103824}, pmid = {39470190}, issn = {2379-5077}, support = {20K18991,24K20264//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; }, mesh = {Humans ; *Clustered Regularly Interspaced Short Palindromic Repeats/genetics ; *Metagenomics/methods ; *Skin/microbiology ; Microbiota/genetics ; Sequence Analysis, DNA/methods ; Metagenome/genetics ; Genetic Markers/genetics ; }, abstract = {The high specificity of the human skin microbiome is expected to provide a new marker for personal identification. Metagenomic sequencing of clustered regularly interspaced short palindromic repeats (CRISPRs), which we call metaCRISPR typing, was shown to achieve personal identification accurately. However, the intra-individual variability observed in previous studies, which may be due to poor DNA yields from skin samples, has resulted in non-reproducible results. Furthermore, whether metaCRISPR typing can assist in the forensic human DNA analysis of low-biomass samples, from which the information obtained is insufficient, is unknown. In the present study, we sequenced serially diluted control streptococcal CRISPRs cloned into plasmids to determine the minimum copy number required to obtain reproducible results from metaCRISPR typing. We found that at least 10[2] copies of CRISPRs are necessary to obtain reproducible results. We then analyzed the skin swab samples using both metaCRISPR typing and human DNA typing. When the DNA extracted from the skin swabs was diluted, no information was obtained from six out of eight samples by human DNA typing. On the other hand, beta diversity indices of spacer sequences compared with reference samples were below 0.8 for three out of six samples, for which no information was obtained from human DNA analysis, indicating that the spacers observed in these samples were similar to those in the references. These results indicate that metaCRISPR typing may contribute to the identification of individuals from whom the samples were obtained, even in cases where human DNA yields are insufficient to perform human DNA analysis.IMPORTANCEPrevious studies have developed new personal identification methods utilizing personal differences in the skin microbiome. However, intra-individual diversity of skin microbiome may preclude the application of microbiome-based personal identification. Moreover, no study has compared microbiome-based personal identification and practical human DNA analysis. Here, we revealed that the results of metaCRISPR typing, a previously developed microbiome-based personal identification method, are stable if the copy number of the marker gene is sufficient. We then analyzed the skin swab samples using both metaCRISPR typing and human DNA analysis. Our results indicate that metaCRISPR typing may provide additional information for personal identification using low-biomass samples that cannot be used for conventional human DNA analysis.}, }
@article {pmid39468837, year = {2024}, author = {Wan, Y and Wong, OWH and Tun, HM and Su, Q and Xu, Z and Tang, W and Ma, SL and Chan, S and Chan, FKL and Ng, SC}, title = {Fecal microbial marker panel for aiding diagnosis of autism spectrum disorders.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2418984}, pmid = {39468837}, issn = {1949-0984}, mesh = {Humans ; *Feces/microbiology ; *Autism Spectrum Disorder/diagnosis/microbiology ; Female ; *Gastrointestinal Microbiome ; Male ; Child ; Child, Preschool ; *Biomarkers/analysis ; *Bacteria/isolation &amp; purification/classification/genetics ; Metagenome ; Machine Learning ; }, abstract = {Accumulating evidence suggests that gut microbiota alterations influence brain function and could serve as diagnostic biomarkers and therapeutic targets. The potential of using fecal microbiota signatures to aid autism spectrum disorder (ASD) detection is still not fully explored. Here, we assessed the potential of different levels of microbial markers (taxonomy and genome) in distinguishing children with ASD from age and gender-matched typically developing peers (n = 598, ASD vs TD = 273 vs 325). A combined microbial taxa and metagenome-assembled genome (MAG) markers showed a better performance than either microbial taxa or microbial MAGs alone for detecting ASD. A machine-learning model comprising 5 bacterial taxa and 44 microbial MAG markers (2 viral MAGs and 42 bacterial MAGs) achieved an area under the receiving operator curve (AUROC) of 0.886 in the discovery cohort and 0.734 in an independent validation cohort. Furthermore, the identified biomarkers and predicted ASD risk score also significantly correlated with the core symptoms measured by the Social Responsiveness Scale-2 (SRS-2). The microbiome panel showed a superior classification performance in younger children (≤6 years old) with an AUROC of 0.845 than older children (>6 years). The model was broadly applicable to subjects across genders, with or without gastrointestinal tract symptoms (constipation and diarrhea) and with or without psychiatric comorbidities (attention deficit and hyperactivity disorder and anxiety). This study highlights the potential clinical validity of fecal microbiome to aid in ASD diagnosis and will facilitate studies to understand the association of disturbance of human gut microbiota and ASD symptom severity.}, }
@article {pmid39468772, year = {2025}, author = {Chero-Sandoval, L and Higuera-Gómez, A and Martínez-Urbistondo, M and Castejón, R and Mellor-Pita, S and Moreno-Torres, V and de Luis, D and Cuevas-Sierra, A and Martínez, JA}, title = {Comparative assessment of phenotypic markers in patients with chronic inflammation: Differences on Bifidobacterium concerning liver status.}, journal = {European journal of clinical investigation}, volume = {55}, number = {2}, pages = {e14339}, pmid = {39468772}, issn = {1365-2362}, support = {CD22/00011//Instituto de Salud Carlos III/ ; Y2020/6600//Consejer&#xed;a de Educaci&#xf3;n, Juventud y Deporte, Comunidad de Madrid/ ; }, mesh = {Humans ; Female ; Male ; Adult ; *Gastrointestinal Microbiome ; Middle Aged ; *Bifidobacterium/genetics ; Biomarkers/metabolism ; *Lupus Erythematosus, Systemic/microbiology/metabolism ; *Inflammation/microbiology/metabolism ; Feces/microbiology ; Phenotype ; *Fatty Liver/microbiology/metabolism ; Chronic Disease ; }, abstract = {BACKGROUND: The relationship between systemic lupus erythematosus (SLE) and low-grade metabolic inflammation (MI) with the microbiota is crucial for understanding the pathogenesis of these diseases and developing effective therapeutic interventions. In this context, it has been observed that the gut microbiota plays a key role in the immune regulation and inflammation contributing to the exacerbation through inflammatory mediators. This research aimed to describe similarities/differences in anthropometric, biochemical, inflammatory, and hepatic markers as well as to examine the putative role of gut microbiota concerning two inflammatory conditions: SLE and MI.<br><br>METHODS: Data were obtained from a cohort comprising adults with SLE and MI. Faecal samples were determined by 16S technique. Statistical analyses compared anthropometric and clinical variables, and LEfSe and MetagenomeSeq were used for metagenomic data. An interaction analysis was fitted to investigate associations of microbiota with fatty liver index (FLI) depending on the inflammatory condition.<br><br>RESULTS: Participants with low-grade MI showed worse values in anthropometry and biochemicals compared with patients with SLE. The liver profile of patients with MI was unhealthier, while no relevant differences were found in most of the inflammatory markers between groups. LEfSe analysis revealed an overrepresentation of Bifidobacteriaceae family in SLE group. An interactive association between gut Bifidobacterium abundance and type of disease was identified for FLI values, suggesting an effect modification of the gut microbiota concerning liver markers depending on the inflammatory condition.<br><br>CONCLUSION: This study found phenotypical and microbial similarities and disparities between these two inflammatory conditions, evidenced in clinical and hepatic markers, and showed the interactive interplay between gut Bifidobacterium and liver health (measured by FLI) that occur in a different manner depending on the type of inflammatory disease. These results underscore the importance of personalized approaches and individual microbiota in the screening of different inflammatory situations, considering unique hepatic and microbiota profiles.}, }
@article {pmid39468445, year = {2024}, author = {Chen, Q and Chen, Z and Tan, Y and Wu, S and Zou, S and Liu, J and Song, S and Du, Q and Wang, M and Liang, K}, title = {Blood microbiota in HIV-infected and HIV-uninfected patients with suspected sepsis detected by metagenomic next-generation sequencing.}, journal = {BMC infectious diseases}, volume = {24}, number = {1}, pages = {1210}, pmid = {39468445}, issn = {1471-2334}, support = {PTXM2020008//Medical Science and Technology Innovation Platform Support Project of Zhongnan Hospital, Wuhan University/ ; cxpy2017043//Science and Technology Innovation Cultivation Fund of Zhongnan Hospital, Wuhan University/ ; TFJC2018004//Medical Science Advancement Program (Basic Medical Sciences) of Wuhan University/ ; 2020-PT320-004//Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences/ ; }, mesh = {Humans ; *HIV Infections/complications/microbiology ; Male ; Female ; Middle Aged ; *Sepsis/microbiology/blood ; *High-Throughput Nucleotide Sequencing ; Retrospective Studies ; Adult ; *Metagenomics/methods ; *Microbiota ; China ; Bacteria/classification/genetics/isolation &amp; purification ; Aged ; }, abstract = {BACKGROUND: Information on the comparison of blood microbiota between human immunodeficiency virus (HIV)-infected and HIV-uninfected patients with suspected sepsis by metagenomic next-generation sequencing (mNGS) is limited.<br><br>METHODS: Retrospectively analysis was conducted in HIV-infected and HIV-uninfected patients with suspected sepsis at Changsha First Hospital (China) from March 2019 to August 2022. Patients who underwent blood mNGS testing were enrolled. The blood microbiota detected by mNGS were analyzed.<br><br>RESULTS: A total of 233 patients with suspected sepsis who performed blood mNGS were recruited in this study, including 79 HIV-infected and 154 HIV-uninfected patients. Compared with HIV-uninfected patients, the proportions of mycobacterium (p&#x2009;=&#x2009;0.001), fungus (p&#x2009;<&#x2009;0.001) and viruses (p&#x2009;<&#x2009;0.001) were significantly higher, while the proportion of bacteria (p&#x2009;=&#x2009;0.001) was significantly lower in HIV-infected patients. The higher positive rates of non-tuberculous mycobacteriosis (NTM, p&#x2009;=&#x2009;0.022), Pneumocystis jirovecii (P. jirovecii) (p&#x2009;=&#x2009;0.014), Talaromyces marneffei (T. marneffei) (p&#x2009;<&#x2009;0.001) and cytomegalovirus (CMV) (p&#x2009;<&#x2009;0.001) were observed in HIV-infected patients, compared with HIV-uninfected patients. In addition, compared with HIV-uninfected patients, the constituent ratio of T. marneffei (p&#x2009;<&#x2009;0.001) in the fungus spectrum were significantly higher, while the constituent ratios of Candida (p&#x2009;<&#x2009;0.001) and Aspergillus (p&#x2009;=&#x2009;0.001) were significantly lower in HIV-infected patients.<br><br>CONCLUSIONS: Significant differences in the blood microbiota profiles exist between HIV-infected and HIV-uninfected patients with suspected sepsis.}, }
@article {pmid39468253, year = {2024}, author = {Luna, N and Páez-Triana, L and Ramírez, AL and Muñoz, M and Goméz, M and Medina, JE and Urbano, P and Barragán, K and Ariza, C and Martínez, D and Hernández, C and Patiño, LH and Ramirez, JD}, title = {Microbial community dynamics in blood, faeces and oral secretions of neotropical bats in Casanare, Colombia.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {25808}, pmid = {39468253}, issn = {2045-2322}, support = {Internal funds//Universidad del Rosario/ ; }, mesh = {Animals ; *Chiroptera/microbiology/virology ; *Feces/microbiology/virology ; Colombia/epidemiology ; Microbiota/genetics ; Bacteria/genetics/classification/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; Fungi/genetics/isolation &amp; purification/classification ; Metagenomics/methods ; Mouth/microbiology/virology ; RNA, Ribosomal, 16S/genetics ; Viruses/genetics/isolation &amp; purification/classification ; Saliva/microbiology/virology ; }, abstract = {Bats are known reservoirs for a wide range of pathogenic microorganisms, including viruses, bacteria, fungi, helminths, and protozoa, which can be transmitted and infect other zoonotic organisms. Various studies have utilised next-generation sequencing (NGS) to describe the pathogens associated with bats. Although most have characterised microbial communities in specific body fluids, few have analysed the composition and diversity of these microbial communities across different body fluids at the individual level. In this study, we employed two next-generation sequencing techniques: amplicon-based sequencing of the V4 hypervariable region of the 16S- and 18S-rRNA genes and viral metagenomics, to describe the prokaryotic, eukaryotic, and viral communities present in blood, faeces, and oral swab samples collected from two genera of bats (Carollia and Phyllostomus) in the department of Casanare, eastern Colombia. A total of 60 samples corresponding to the three bodily fluids were processed and analysed. The results indicated that the microbial communities across the body fluids were mainly composed of bacteria, fungi, protozoa, and various DNA and RNA viruses, showing a variability of microbial genera and species. The abundances, diversity metrics, and correlations of these microorganisms displayed patterns associated with bat genus and body fluids, suggesting that the ecological characteristics of these microbial communities may be influenced by the ecological and physiological traits of the bats. Additionally, we found similar community compositions of bacteria, some fungal genera, and viruses in the three body fluids, indicating a possible circulation of these microbes within the same bat. This could be due to microbial movement from the gut microbiota to other physiological systems or transmission via blood-feeding vectors. Furthermore, our results revealed the presence of various microbes of public health concern, including Bartonella spp., Mannheimia haemolytica, Rhodotorula spp., Piroplasmida spp., Toxoplasma gondii, Alphacoronavirus spp., and Bat circovirus. The abundance of these pathogenic microbial species across the three bodily fluids suggests potential transmission routes from bats to other organisms, which may contribute to the emergence of zoonotic disease outbreaks. These findings highlight the variability of microorganisms present within the same bat and the different pathogen-host interactions that may regulate the presence and transmission of these zoonotic microbes. Further research is required to elucidate the genomic features, ecological interactions, and biological activities of these microbial communities in bats.}, }
@article {pmid39467883, year = {2024}, author = {Saini, N and Aamir, M and Khan, ZA and Singh, VK and Sah, P and Mona, S}, title = {Deciphering Toxic Pollutants Breakdown Potential in Microbial Community of Chumathang Hot Spring, Ladakh, India via Shotgun Metagenome Sequencing.}, journal = {Current microbiology}, volume = {81}, number = {12}, pages = {430}, pmid = {39467883}, issn = {1432-0991}, mesh = {*Hot Springs/microbiology ; India ; *Biodegradation, Environmental ; *Metagenome ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Metagenomics ; Microbiota/genetics ; Phylogeny ; Persistent Organic Pollutants/metabolism ; Xenobiotics/metabolism ; High-Throughput Nucleotide Sequencing ; }, abstract = {Persistent Organic Pollutants (POPs) have been in focus of research due to their massive contamination of environment and bio-accumulation. Bioremediation and high-throughput research have gained momentum to curb the harmful effects of POPs. The present research has explored the microbial diversity of Chumathang Hot Spring, Ladakh, India, through Illumina metagenomic HiSeq 4000 sequencing platform and their potential to degrade persistent pollutants, especially xenobiotics. Taxonomic characterization based on raw metagenomic data illuminated the abundance of members of Pseudomonadota and Actinomyceota. The re-construction of the microbial genomes from assembled contigs and scaffolds using de novo assembler metaSPAdes and their further annotation through contig alignment with available reference genomes elucidated the landscape of the hot spring's microbes. The predominantly occupied key genera reported were Pannonibacter and Novosphingobium. Comparative genomic analysis established evolutionary relationships and functional diversities among hot spring microbial communities. The function annotation through MG-RAST has revealed their metabolic versatility of degrading a wide array of xenobiotic compounds, including caprolactam, dioxin, chlorobenzene, benzoate, and. Further, the hydroxylating dioxygenase (Saro_3901) was identified as a pivotal component in the aromatic degradation pathways, showcasing extensive metabolic interconnectivity. Interestingly, protein interaction network analysis identified hub genes like Saro_1233 (protocatechuate 4,5-dioxygenase alpha subunit), while Saro_3057 (amidase) was noted for its critical role in network communication and control. The resilience of thermal ecosystems, evidenced by robust enzymatic activity and degradation capability among organisms with < 95% genetic similarity, underscores their potential for industrial and bioremediation exploration, emphasizing the importance of preserving and studying biodiverse habitats.}, }
@article {pmid39467681, year = {2024}, author = {Wang, HM and Zhang, MM and Lin, Y and Liu, Y and Xue, GH and Shi, L and Yuan, J and Li, XH}, title = {[Characteristics of intestinal microbiota in the acute phase of Kawasaki disease in infants and children].}, journal = {Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics}, volume = {26}, number = {10}, pages = {1101-1107}, pmid = {39467681}, issn = {1008-8830}, mesh = {Case-Control Studies ; Humans ; Infant ; Child, Preschool ; *Mucocutaneous Lymph Node Syndrome/microbiology ; *Gastrointestinal Microbiome ; Metagenomics ; Listeria monocytogenes ; Enterococcus hirae ; }, abstract = {OBJECTIVES: To study the composition, abundance, and functional profiles of the intestinal microbiota in infants and young children with Kawasaki disease (KD) during the acute phase, and to explore the potential role of intestinal microbiota in the pathogenesis of KD.<br><br>METHODS: Six children aged 0-3 years with acute KD admitted to the Department of Cardiology, Children's Hospital Affiliated to Capital Institute of Pediatrics from July to October 2021 were prospectively included as the KD group. Six age- and sex-matched healthy children who underwent physical examinations at the hospital during the same period were selected as the healthy control group. Metagenomics sequencing was used to detect and compare the differences in the microflora structure and functional profiles of fecal samples between the two groups.<br><br>RESULTS: There were significant differences in the structural composition and diversity of intestinal microbiota between the two groups (P<0.05). Compared with the healthy control group, the abundance of Listeria_monocytogenes (family Listeriaceae and genus Listeria), Bifidobacterium_rousetti, Enterococcus_avium, and Enterococcus_hirae was significantly higher in the intestinal microbiota in the KD group (|LDA|>2.0, P<0.05). The steroid degradation and apoptosis pathways were significantly upregulated in the KD group compared with the healthy control group, while the Bacterial_secretion_system, Sulfur_metabolism, Butanoate_metabolism, Benzoate_degradation, &#x3b2;-alanine metabolism, and &#x3b1;-linolenic acid pathways were significantly downregulated (|LDA|>2, P<0.05).<br><br>CONCLUSIONS: There are significant differences in the structure and diversity of intestinal microbiota between children aged 0-3 years with acute KD and healthy children, suggesting that disturbances in intestinal microbiota occur during the acute phase of KD. In particular, Listeria_monocytogenes, Enterococcus_avium, and Enterococcus_hirae may be involved in the pathogenesis of KD through steroid degradation and apoptosis pathways.}, }
@article {pmid39465298, year = {2024}, author = {Xiao, X and Singh, A and Giometto, A and Brito, IL}, title = {Segatella clades adopt distinct roles within a single individual's gut.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {114}, pmid = {39465298}, issn = {2055-5008}, support = {DP2 HL141007/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Fatty Acids, Volatile/metabolism ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Genetic Variation ; Anti-Bacterial Agents/pharmacology ; Host Microbial Interactions ; Metagenomics/methods ; Drug Resistance, Bacterial ; Epithelial Cells/microbiology ; }, abstract = {Segatella is a prevalent genus within individuals' gut microbiomes worldwide, especially in non-Western populations. Although metagenomic assembly and genome isolation have shed light on its genetic diversity, the lack of available isolates from this genus has resulted in a limited understanding of how members' genetic diversity translates into phenotypic diversity. Within the confines of a single gut microbiome, we have isolated 63 strains from diverse lineages of Segatella. We performed comparative analyses that exposed differences in cellular morphologies, preferences in polysaccharide utilization, yield of short-chain fatty acids, and antibiotic resistance across isolates. We further show that exposure to Segatella isolates either evokes strong or muted transcriptional responses in human intestinal epithelial cells. Our study exposes large phenotypic differences within related Segatella isolates, extending this to host-microbe interactions.}, }
@article {pmid39465163, year = {2024}, author = {Premsuriya, J and Leerach, N and Laosena, P and Hinthong, W}, title = {The effects of livestock grazing on physicochemical properties and bacterial communities of perlite-rich soil.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18433}, pmid = {39465163}, issn = {2167-8359}, mesh = {*Soil Microbiology ; Animals ; Thailand ; *Soil/chemistry ; *Livestock/microbiology ; *Aluminum Oxide ; *Silicon Dioxide ; Mining ; Bacteria/genetics/classification/isolation &amp; purification ; Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; Biodiversity ; }, abstract = {Livestock grazing has been proposed as a cost-effective way to reclaim post-mining lands. It can enhance soil fertility and biodiversity, but its impacts on soil quality and microbial communities vary across soil types. Moreover, waste from grazing raises concerns about pathogens that could pose risks to animal and human health. This study investigated the effects of grazing on post-mining perlite-rich soil in central Thailand. A comparative analysis of soil physicochemical properties and bacterial diversity was conducted between grazed and ungrazed sites. Bacterial diversity was assessed using 16S amplicon sequencing. The perlite-rich soil was found to be sandy, acidic, and to have low nutritional content. Grazing significantly improved the soil texture and nutrient content, suggesting its potential as a cost-effective reclamation strategy. The 16S metagenomic sequencing analysis revealed that microbial communities were impacted by livestock grazing. Specifically, shifts in the dominant bacterial phyla were identified, with increases in Firmicutes and Chloroflexi and a decrease in Actinobacteria. Concerns about increased levels of pathogenic Enterobacteriaceae due to grazing were not substantiated in perlite-rich soil. These bacteria were consistently found at low levels in all soil samples, regardless of livestock grazing. This study also identified a diverse population of Streptomycetaceae, including previously uncharacterized strains/species. This finding could be valuable given that this bacterial family is known for producing antibiotics and other secondary metabolites. However, grazing adversely impacted the abundance and diversity of Streptomycetaceae in this specific soil type. In line with previous research, this study demonstrated that the response of soil microbial communities to grazing varies significantly depending on the soil type, with unique responses appearing to be associated with perlite-rich soil. This emphasizes the importance of soil-specific research in understanding how grazing affects microbial communities. Future research should focus on optimizing grazing practices for perlite-rich soil and characterizing the Streptomycetaceae community for potential antibiotic and secondary metabolite discovery. The obtained findings should ultimately contribute to sustainable post-mining reclamation through livestock grazing and the preservation of valuable microbial resources.}, }
@article {pmid39462143, year = {2024}, author = {Boutouchent, N and Vu, TNA and Landraud, L and Kennedy, SP}, title = {Urogenital colonization and pathogenicity of E. Coli in the vaginal microbiota during pregnancy.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {25523}, pmid = {39462143}, issn = {2045-2322}, support = {Bourse Ann&#xe9;e Recherche (BAR) 2023-24//University Hospital of Rouen Normandy/ ; DOS0053477 SUB &amp; DOS0053473 AR//Programme d'Investissements d'avenir and BPIfrance/ ; DOS0053477 SUB &amp; DOS0053473 AR//Programme d'Investissements d'avenir and BPIfrance/ ; DOS0053477 SUB &amp; DOS0053473 AR//Programme d'Investissements d'avenir and BPIfrance/ ; }, mesh = {Adult ; Female ; Humans ; Pregnancy ; *Bacteriuria/microbiology ; Enterobacteriaceae/metabolism ; *Escherichia coli/metabolism ; *Escherichia coli Infections/microbiology ; Genome, Bacterial ; Lactobacillus ; Microbiota ; *Reproductive Tract Infections ; *Vagina/microbiology ; Pregnancy Complications, Infectious/microbiology ; }, abstract = {This study explores the role of the vaginal microbiota (VM) in the pathophysiology of asymptomatic bacteriuria (ASB) in a cohort of 1,553 pregnant women. Worldwide, E. coli remains the most common etiological agent of bacteriuria during pregnancy and also a major causative agent of newborn infections. A healthy VM is typically characterized by low diversity and is dominated by lactic acid-producing species, notably those from the Lactobacillus genus. Our results point to decreases in Lactobacillus spp associated with an increase of gut-microbiota-associated species from the Enterobacterales order. Escherichia coli exhibited the most pronounced increase in abundance within the VM during bacteriuria and was notably associated with ASB. Molecular typing and antimicrobial resistance characterization of 72 metagenome assembled E. coli genomes (MAGs) from these pregnant women revealed a genomic signature of extraintestinal pathogenic E. coli ("ExPEC") strains, which are involved in various extraintestinal infections such as urinary tract infections, newborn infections and bacteremia. Microbial diversity within the vaginal samples from which an E. coli MAG was obtained showed a substantial variation, primarily marked by a decrease in abundance of Lactobacillus species. Overall, our study shows how disruption in key bacterial group within the VM can disrupt its stability, potentially leading to the colonization by opportunistic pathogens.}, }
@article {pmid39462132, year = {2024}, author = {Siallagan, ZL and Fadli, M and de Fretes, CE and Opier, RDA and Susanto, RD and Wei, Z and Suhardi, VSH and Nugrahapraja, H and Radjasa, OK and Dwivany, FM}, title = {Metagenomic analysis of deep-sea bacterial communities in the Makassar and Lombok Straits.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {25472}, pmid = {39462132}, issn = {2045-2322}, support = {#80NSSC18K0777//Physical Oceanography Program of the U.S. National Aeronautics and Space Administration (NASA) and through the University of Maryland/ ; }, mesh = {*Bacteria/genetics/classification ; *Metagenomics/methods ; *Seawater/microbiology ; *RNA, Ribosomal, 16S/genetics ; Phylogeny ; Biodiversity ; High-Throughput Nucleotide Sequencing ; Indonesia ; Metagenome ; Microbiota/genetics ; }, abstract = {The extreme conditions of the deep-sea environment, including limited light, low oxygen levels, high pressure, and nutrient scarcity, create a natural habitat for deep-sea bacteria. These remarkable microorganisms have developed unique strategies to survive and adapt to their surroundings. However, research on the diversity of deep-sea bacteria, both culture-dependent and culture-independent, in Indonesian waters remains insufficient. This study focused on exploring the biodiversity of deep-sea bacteria, specifically in the Makassar and Lombok Strait, the main Indonesian throughflow pathway characterized by relatively fertile water, which serves as an important deep-sea region. High-throughput DNA sequencing of full-length 16S rRNA was employed to construct a genomic database. The results of the bioinformatic analysis revealed that two stations, 48 and 50 (Makassar Strait), exhibited a more similar community structure of deep-sea bacteria than did station 33 (Lombok Strait). Among the predominant phyla found at a depth of 1000 m, the top ten were Proteobacteria, Firmicutes, Bacteroidetes, Actinobacteria, Planctomycetes, Acidobacteria, Nitrospinae, Verrucomicrobia, Candidatus Melainabacteria, and Cyanobacteria. Furthermore, the genera Colwellia, Moritella, Candidatus Pelagibacter, Alteromonas, and Psychrobacter consistently appeared at all three stations, albeit with varying relative abundance values. These bacterial genera share common characteristics, such as psychrophilic, halophilic, and piezophilic tendencies, and are commonly found in deep-sea ecosystem. The environmental conditions at a depth of 1000 m were relatively stable, with an average pressure 10 MPa, temperature 4.68 °C, salinity 34.58 PSU, pH 8.06, chlorophyll-a 0.29 µg/L, nitrate 3.19 µmol/L, phosphate 6.32 µmol/L and dissolved oxygen (DO) 2.90 mg/L. The bacterial community structures at the three sampling stations located at the same depth (1000 m) exhibited similarities, as indicated by the closely aligned similarity index values.}, }
@article {pmid39461939, year = {2024}, author = {Gardiner, LJ and Marshall, M and Reusch, K and Dearden, C and Birmingham, M and Carrieri, AP and Pyzer-Knapp, EO and Krishna, R and Neal, AL}, title = {DGCNN approach links metagenome-derived taxon and functional information providing insight into global soil organic carbon.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {113}, pmid = {39461939}, issn = {2055-5008}, support = {BBS/E/RH/230003B//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; BB/X010953/1//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; }, mesh = {*Soil Microbiology ; *Carbon/metabolism ; *Soil/chemistry ; *Metagenomics/methods ; *Metagenome ; Machine Learning ; Microbiota ; Carbon Cycle ; Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Neural Networks, Computer ; }, abstract = {Metagenomics can provide insight into the microbial taxa present in a sample and, through gene identification, the functional potential of the community. However, taxonomic and functional information are typically considered separately in downstream analyses. We develop interpretable machine learning (ML) approaches for modelling metagenomic data, combining the biological representation of species with their associated genetically encoded functions within models. We apply our methods to investigate soil organic carbon (SOC) stocks. First, we combine a diverse global set of soil microbiome samples with environmental data, improving the predictive performance of classic ML and providing new insights into the role of soil microbiomes in global carbon cycling. Our network analysis of predictive taxa identified by classical ML models provides context for their ecological significance, extending the focus beyond just the most predictive taxa to 'hidden' features within the model that might be considered less predictive using standard methods for explainability. We next develop unique graph representations for individual microbiomes, linking microbial taxa to their associated functions directly, enabling predictions of SOC via deep graph convolutional neural networks (DGCNNs). Interpretation of the DGCNNs distinguished between the importance of functions of key individual species, providing genome sequence differences, e.g., gene loss/acquisition, that associate with SOC. These approaches identify several members of the Verrucomicrobiaceae family and a range of genetically encoded functions, e.g., related to carbohydrate metabolism, as important for SOC stocks and effective global SOC predictors. These relatively understudied but widespread organisms could play an important role in SOC dynamics globally.}, }
@article {pmid39461337, year = {2024}, author = {Häcker, D and Siebert, K and Smith, BJ and Köhler, N and Riva, A and Mahapatra, A and Heimes, H and Nie, J and Metwaly, A and Hölz, H and Manz, Q and De Zen, F and Heetmeyer, J and Socas, K and Le Thi, G and Meng, C and Kleigrewe, K and Pauling, JK and Neuhaus, K and List, M and Pollard, KS and Schwerd, T and Haller, D}, title = {Exclusive enteral nutrition initiates individual protective microbiome changes to induce remission in pediatric Crohn's disease.}, journal = {Cell host &amp; microbe}, volume = {32}, number = {11}, pages = {2019-2034.e8}, pmid = {39461337}, issn = {1934-6069}, support = {R01 HL160862/HL/NHLBI NIH HHS/United States ; }, mesh = {*Crohn Disease/microbiology/therapy ; Animals ; Humans ; *Gastrointestinal Microbiome ; *Enteral Nutrition ; Mice ; *Feces/microbiology ; Child ; Female ; Male ; Germ-Free Life ; Adolescent ; Prospective Studies ; Interleukin-10/metabolism/genetics ; Metagenomics ; Fatty Acids/metabolism ; Disease Models, Animal ; Remission Induction ; Mice, Inbred C57BL ; Clostridiales ; Bacteria/classification/genetics ; }, abstract = {Exclusive enteral nutrition (EEN) is a first-line therapy for pediatric Crohn's disease (CD), but protective mechanisms remain unknown. We established a prospective pediatric cohort to characterize the function of fecal microbiota and metabolite changes of treatment-naive CD patients in response to EEN (German Clinical Trials DRKS00013306). Integrated multi-omics analysis identified network clusters from individually variable microbiome profiles, with Lachnospiraceae and medium-chain fatty acids as protective features. Bioorthogonal non-canonical amino acid tagging selectively identified bacterial species in response to medium-chain fatty acids. Metagenomic analysis identified high strain-level dynamics in response to EEN. Functional changes in diet-exposed fecal microbiota were further validated using gut chemostat cultures and microbiota transfer into germ-free Il10-deficient mice. Dietary model conditions induced individual patient-specific strain signatures to prevent or cause inflammatory bowel disease (IBD)-like inflammation in gnotobiotic mice. Hence, we provide evidence that EEN therapy operates through explicit functional changes of temporally and individually variable microbiome profiles.}, }
@article {pmid39460431, year = {2024}, author = {Lin, B and Melnikov, V and Guo, S and Cao, Z and Ye, Z and Ye, Z and Ji, C and Chen, J and Wang, J and Zhang, H and Jiang, Y and Shi, C and Chen, Z and Zhang, Q and Ma, Z and Qiao, N and Chen, L and Wang, M and Wang, Y and Zhang, Z and Ye, H and Li, Y and Zhang, Y and Gao, R and Yu, Y}, title = {Concomitant gut dysbiosis and defective gut barrier serve as the bridges between hypercortisolism and chronic systemic inflammation in Cushing's disease.}, journal = {European journal of endocrinology}, volume = {191}, number = {5}, pages = {509-522}, doi = {10.1093/ejendo/lvae139}, pmid = {39460431}, issn = {1479-683X}, support = {82202906, 81972221, 81970716, 82170841, 82200921, 82370656, U21A20389, 82073640//National Natural Science Foundation of China/ ; SHDC12018X04//Shanghai Hospital Development Center/ ; 2023-I2M-C&amp;T-B-125//CAMS Innovation Fund for Medical Sciences/ ; //National Project for Promoting the Diagnosis and Treatment of Major Diseases/ ; //MDT/ ; }, mesh = {Humans ; *Dysbiosis/metabolism ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Adult ; Middle Aged ; Caco-2 Cells ; *Inflammation/metabolism ; Feces/microbiology/chemistry ; Intestinal Mucosa/metabolism/microbiology ; Pituitary ACTH Hypersecretion/metabolism ; Cushing Syndrome/metabolism/microbiology ; Carrier Proteins/metabolism ; }, abstract = {OBJECTIVE: The aim of this study was to investigate the gut microbial signatures and related pathophysiological implications in patients with Cushing's disease (CD).<br><br>DESIGN AND METHODS: Twenty-seven patients with CD and 45 healthy controls were enrolled. Based on obtained metagenomics data, we performed correlation, network study, and genome interaction group (GIG) analysis. Fecal metabolomics and serum enzyme linked immunosorbent assay (ELISA) analysis were conducted in dichotomized CD patients. Caco-2 cells were incubated with gradient concentrations of cortisol for subsequent transepithelial electrical resistance (TEER) measurement, FITC-dextran transwell permeability assay, qPCR, and western blot analysis.<br><br>RESULTS: Gut microbial composition in patients with CD was notably different from that in healthy controls. Network analysis revealed that Eubacterium siraeum might serve as the core specie in the gut microbial system of CD patients. Subsequent GIG analysis identified the positive correlations between GIG9 and UFC. Further serum ELISA and fecal metabolomics uncovered that CD patients with elevated UFC levels were characterized with increased lipopolysaccharide binding protein (LBP). Moreover, remarkable positive association was found between LBP level and relative abundance of E. siraeum. TEER and FITC-dextran transwell assays demonstrated that hypercortisolism induced increased gut permeability. Further qPCR and western blot analysis suggested that dysregulated AhR/Claudin 2 axis might be involved in the development of hypercortisolism-induced defective gut barrier function.<br><br>CONCLUSIONS: Disease activity associated dysbiosis and defective gut barrier might jointly facilitate the development of systemic inflammation in patients with CD.}, }
@article {pmid39459947, year = {2024}, author = {Vansia, R and Smadi, M and Phelan, J and Wang, A and Bilodeau, GJ and Pernal, SF and Guarna, MM and Rott, M and Griffiths, JS}, title = {Viral Diversity in Mixed Tree Fruit Production Systems Determined through Bee-Mediated Pollen Collection.}, journal = {Viruses}, volume = {16}, number = {10}, pages = {}, pmid = {39459947}, issn = {1999-4915}, support = {J-002323//Agriculture and Agri-Food Canada/ ; N-000212//Canadian Food Inspection Agency/ ; GRDI-SID-P-1903//Canadian Food Inspection Agency/ ; }, mesh = {*Pollen/virology ; Bees/virology ; Animals ; *Fruit/virology ; *Plant Diseases/virology ; *Plant Viruses/genetics/isolation &amp; purification/classification ; *Pollination ; Virome/genetics ; Prunus/virology ; Metagenomics ; Trees/virology ; Malus/virology ; Ilarvirus/genetics/isolation &amp; purification/classification ; Phylogeny ; Nepovirus/genetics/isolation &amp; purification/classification/physiology ; }, abstract = {Commercially cultivated Prunus species are commonly grown in adjacent or mixed orchards and can be infected with unique or commonly shared viruses. Apple (Malus domestica), another member of the Rosacea and distantly related to Prunus, can share the same growing regions and common pathogens. Pollen can be a major route for virus transmission, and analysis of the pollen virome in tree fruit orchards can provide insights into these virus pathogen complexes from mixed production sites. Commercial honey bee (Apis mellifera) pollination is essential for improved fruit sets and yields in tree fruit production systems. To better understand the pollen-associated virome in tree fruits, metagenomics-based detection of plant viruses was employed on bee and pollen samples collected at four time points during the peak bloom period of apricot, cherry, peach, and apple trees at one orchard site. Twenty-one unique viruses were detected in samples collected during tree fruit blooms, including prune dwarf virus (PDV) and prunus necrotic ringspot virus (PNRSV) (Genus Ilarvirus, family Bromoviridae), Secoviridae family members tomato ringspot virus (genus Nepovirus), tobacco ringspot virus (genus Nepovirus), prunus virus F (genus Fabavirus), and Betaflexiviridae family member cherry virus A (CVA; genus Capillovirus). Viruses were also identified in composite leaf and flower samples to compare the pollen virome with the virome associated with vegetative tissues. At all four time points, a greater diversity of viruses was detected in the bee and pollen samples. Finally, the nucleotide sequence diversity of the coat protein regions of CVA, PDV, and PNRSV was profiled from this site, demonstrating a wide range of sequence diversity in pollen samples from this site. These results demonstrate the benefits of area-wide monitoring through bee pollination activities and provide new insights into the diversity of viruses in tree fruit pollination ecosystems.}, }
@article {pmid39458495, year = {2024}, author = {Ohkusa, T and Kato, K and Sekizuka, T and Sugiyama, T and Sato, N and Kuroda, M}, title = {Comparison of the Gut Microbiota of Patients Who Improve with Antibiotic Combination Therapy for Ulcerative Colitis and Those Who Do Not: Investigation by Fecal Metagenomic Analyses.}, journal = {Nutrients}, volume = {16}, number = {20}, pages = {}, pmid = {39458495}, issn = {2072-6643}, mesh = {Humans ; *Colitis, Ulcerative/microbiology/drug therapy ; *Gastrointestinal Microbiome/drug effects ; *Feces/microbiology ; *Anti-Bacterial Agents/administration &amp; dosage/pharmacology ; Male ; Female ; Adult ; Middle Aged ; *Metronidazole/administration &amp; dosage ; *Drug Therapy, Combination ; Metagenomics/methods ; Amoxicillin/administration &amp; dosage/pharmacology ; Tetracycline/pharmacology/administration &amp; dosage ; Dysbiosis/microbiology ; Young Adult ; Treatment Outcome ; }, abstract = {Background/Objectives: The cause of ulcerative colitis (UC) may be related to commensal bacteria in genetically susceptible patients. We previously demonstrated that triple antibiotic combination therapy induces remission in patients with active UC in randomized controlled trials (RCTs). Now, we investigate changes in the gut microbiota of patients who responded to the antibiotic combination therapy. Methods: Thirty-one patients with UC given ATM/AFM (amoxicillin, metronidazole, and tetracycline or fosfomycin) therapy for two weeks were enrolled in this study. The clinical conditions of these UC patients were evaluated by the partial Mayo score. The gut microbiota was compared via the metagenomic shot gun analysis of fecal samples. Results: Of the 31 patients, 16 and 8 experienced complete and partial remission, respectively, over three months in response to ATM/AFM therapy, whereas ATM/AFM showed no efficacy in 7 patients. The dysbiosis before treatment in the active stage could be associated with increased populations of Bacteroides, Parabacteroides, Rickenella, Clostridium, Flavonifractor, Pelagibacter, Bordetella, Massilia, and Piscrickettsia species. Metagenomic analysis revealed dramatic changes in the gut microbiota at an early stage, that is, just two weeks after starting ATM/AFM therapy. After treatment in the responder group, the populations of bifidobacterium and lactobacilli species were significantly increased, while the population of bacteroides decreased. Conclusions: These results suggest that metagenomic analysis demonstrated a marked change in the gut microbiota after antibiotic combination treatment. In the triple antibiotic combination therapy, remission was associated with an increase in bifidobacterium and lactobacilli species.}, }
@article {pmid39458465, year = {2024}, author = {Filardo, S and Di Pietro, M and Mastromarino, P and Porpora, MG and Sessa, R}, title = {A Multi-Strain Oral Probiotic Improves the Balance of the Vaginal Microbiota in Women with Asymptomatic Bacterial Vaginosis: Preliminary Evidence.}, journal = {Nutrients}, volume = {16}, number = {20}, pages = {}, pmid = {39458465}, issn = {2072-6643}, mesh = {Humans ; Female ; *Probiotics/administration &amp; dosage ; *Vaginosis, Bacterial/microbiology/drug therapy/therapy ; *Vagina/microbiology ; Adult ; Prospective Studies ; Pilot Projects ; *Microbiota/drug effects ; Administration, Oral ; Young Adult ; Lactobacillus ; }, abstract = {BACKGROUND/OBJECTIVES: the vaginal microbiota is known to confer protection in the genital ecosystem, due to the predominance of different Lactobacillus species, playing a crucial role in women's health; alterations in the composition of the microbial communities in the vagina can be associated with the development of bacterial vaginosis (BV). Current therapy for BV involves oral or intravaginal administration of metronidazole or clindamycin, albeit the high recurrence rates suggest a need for alternative therapeutic tools, such as probiotics. Herein, the diversity and composition of vaginal microbiota in women with asymptomatic BV was investigated before and after the oral administration of a multi-strain probiotic formulation.<br><br>METHODS: a prospective observational pilot study with pre-post design was carried out from 1 June 2022, to 31 December 2022, on reproductive-age women with asymptomatic BV, as diagnosed via Nugent score, and matched healthy controls. The probiotic was administered to all study participants as acid-resistant oral capsules (twice daily), and a vaginal swab was collected at baseline and after 2 months of treatment, for the metagenomic analysis of 16s rDNA.<br><br>RESULTS: the diversity and richness of the vaginal microbiota in women with BV were significantly reduced after 2 months of supplementation with the oral probiotic, as evidenced by measures of &#x3b1;-diversity. Interestingly, some bacterial genera typically associated with dysbiosis, such as Megasphaera spp., were significantly decreased; whereas, at the same time, Lactobacillus spp. Doubled.<br><br>CONCLUSIONS: our preliminary results suggest that the multi-strain oral probiotic is a beneficial treatment specifically targeting the dysbiotic vaginal microenvironment.}, }
@article {pmid39457438, year = {2024}, author = {Wei, Q and Song, Z and Chen, Y and Yang, H and Chen, Y and Liu, Z and Yu, Y and Tu, Q and Du, J and Li, H}, title = {Metagenomic Sequencing Elucidated the Microbial Diversity of Rearing Water Environments for Sichuan Taimen (Hucho bleekeri).}, journal = {Genes}, volume = {15}, number = {10}, pages = {}, pmid = {39457438}, issn = {2073-4425}, support = {(YSCX2035-011)//the Project of Original Innovation 2035/ ; (2022ZZCX093)//Sichuan Province financial independent innovation special project/ ; (SCCXTD-2024-15)//Sichuan Fresh Water Fish Innovation Team/ ; (cjb2024wzbh-011)//Ministry of Agriculture and Rural Affairs of the Yangtze River Basin Fisheries Administration Office-Artificial Breeding and Habitat Restoration of Sichuan taimen/ ; }, mesh = {Animals ; China ; *Metagenomics/methods ; Microbiota/genetics ; Water Microbiology ; Bacteria/genetics/classification ; Metagenome ; Biodiversity ; Fishes/microbiology/genetics ; Aquaculture/methods ; }, abstract = {BACKGROUND: Sichuan taimen (Hucho bleekeri) is a fish species endemic to China's upper Yangtze River drainage and has significant value as an aquatic resource. It was listed as a first-class state-protected wild animal by the Chinese government due to its very limited distribution and wild population at present.<br><br>METHODS: To elucidate the diversity of microorganisms in rearing water environments for H. bleekeri, metagenomic sequencing was applied to water samples from the Maerkang and Jiguanshan fish farms, where H. bleekeri were reared.<br><br>RESULTS: The results revealed that Pseudomonadota was the dominant phylum in the microbial communities of the water samples. Among the shared bacterial groups, Cyanobacteriota, Actinomycetota, Planctomycetota, Nitrospirota, and Verrucomicrobiota were significantly enriched in the water environment of Jiguanshan (p < 0.01), while Bacteroidota was more enriched in that of Maerkang (p < 0.01). Additionally, the Shannon diversity and Simpson index of the microbial community in the water environment of Maerkang were lower than in that of Jiguanshan.<br><br>CONCLUSIONS: The present study demonstrated the similarities and differences in the microbial compositions of rearing water environments for H. bleekeri, which are expected to benefit the artificial breeding of H. bleekeri in the future.}, }
@article {pmid39457400, year = {2024}, author = {Arciuch-Rutkowska, M and Nowosad, J and Łuczyński, MK and Hussain, SM and Kucharczyk, D}, title = {Next-Generation Sequencing to Determine Changes in the Intestinal Microbiome of Juvenile Sturgeon Hybrid (Acipenser gueldenstaedtii♀ × Acipenser baerii♂) Resulting from Sodium Butyrate, Β-Glucan and Vitamin Supplementation.}, journal = {Genes}, volume = {15}, number = {10}, pages = {}, pmid = {39457400}, issn = {2073-4425}, support = {DWD/4/80/2020//Polish Ministry of Education and Science/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects/genetics ; *beta-Glucans/pharmacology/administration &amp; dosage ; *Butyric Acid/metabolism/pharmacology ; *Fishes/genetics/microbiology ; *High-Throughput Nucleotide Sequencing ; *Dietary Supplements ; *Vitamins/pharmacology/administration &amp; dosage ; Animal Feed/analysis ; Male ; Female ; Hydrocortisone ; Muramidase/genetics ; }, abstract = {BACKGROUND/OBJECTIVES: The effect of sodium butyrate (NaB), β-glucan (βG) and vitamins in the diet on gut microbiome, cortisol level, lysozyme activity and growth parameters of juvenile hybrid sturgeon (Acipenser gueldenstaedtii♀ × Acipenser baerii♂) was determined.<br><br>METHODS: Sturgeon hybrids (n = 144) were divided into three groups with enriched feeding (mg/kg of feed): FQV1 (50 NaB; 20 &#x3b2;G; const. vitamins), FQV2 (150 NaB; 20 &#x3b2;G; const. vitamins), FQV3 (50 NaB; 60 &#x3b2;G; const. vitamins) and control (not supplemented), each group in triplicate, 12 fish in each repetition. Rearing was carried out for 30 days in controlled conditions. Gut microbiome was characterized using Next Generation Sequencing (NGS) of DNA samples isolated from intestinal content. Cortisol level was determined using the ELISA test. Lysozyme activity was measured by turbidimetric test.<br><br>RESULTS: Based on data obtained from NGS, it was determined that the FQV1 group is characterized by the highest values of diversity indices (Shannon, Simpson and Chao-1) and the largest number of ASVs (Amplicon Sequence Variants). The highest abundance of probiotic bacteria (Lactobacillus, Lactococcus) was determined in the FQV1 group. The highest cortisol concentration was determined in the control (33.26 ng/mL), while the lowest was in FQV3 (27.75 ng/mL). The highest lysozyme activity was observed in FQV1 (154.64 U/mL), and the lowest in FQV2 (104.39 U/mL) and control (121.37 U/mL) (p < 0.05). FQV2 was characterized by significantly more favorable values of breeding indicators (p < 0.05).<br><br>CONCLUSIONS: The obtained results prove that an appropriate composition of NaB, &#x3b2;G and vitamins can be used in the commercial breeding of juvenile hybrid sturgeons.}, }
@article {pmid39457387, year = {2024}, author = {Naumova, OY and Dobrynin, PV and Khafizova, GV and Grigorenko, EL}, title = {The Association of the Oral Microbiota with Cognitive Functioning in Adolescence.}, journal = {Genes}, volume = {15}, number = {10}, pages = {}, pmid = {39457387}, issn = {2073-4425}, support = {P20HD091005//the Eunice Kennedy Shriver National Institute of Child Health and Human Development/ ; }, mesh = {Humans ; Male ; Adolescent ; *Cognition ; *Mouth/microbiology ; Child ; *Microbiota ; Saliva/microbiology ; Metagenomics/methods ; Bacteria/genetics/classification ; }, abstract = {Background: A growing body of research supports the role of the microbial communities residing in the digestive system in the host's cognitive functioning. Most of these studies have been focused on the gut microbiome and its association with clinical phenotypes in middle-aged and older adults. There is an insufficiency of population-based research exploring the association of normative cognitive functioning with the microbiome particularly with the oral microbiota. Methods: In this study, using metagenomics and metabolomics, we characterized the salivary microbiome diversity in a sample of 51 males of Hispanic and African American origin aged 12-18 years and explored the associations between the microbiome and the youths' cognitive performance captured with the Kaufman Assessment Battery for Children II (KABC-II). Results: Several bacterial species of the oral microbiota and related metabolic pathways were associated with cognitive function. In particular, we found negative associations between indicators of general intelligence and the relative abundance of Bacteroidetes and Lachnospiraceae and positive associations with Bifidobacteriaceae and Prevotella histicola sp. Among metabolic pathways, the super pathways related to bacterial cell division and GABA metabolism were linked to cognitive function. Conclusions: The results of our work are consistent with the literature reporting on the association between microbiota and cognitive function and support further population work to elucidate the potential for a healthy oral microbiome to improve cognitive health.}, }
@article {pmid39456970, year = {2024}, author = {Yang, C and Wusigale,  and You, L and Li, X and Kwok, LY and Chen, Y}, title = {Inflammation, Gut Microbiota, and Metabolomic Shifts in Colorectal Cancer: Insights from Human and Mouse Models.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456970}, issn = {1422-0067}, support = {2022YFHH0060//Inner Mongolia Autonomous Region Key R&amp;D Plan Project/ ; NMGIRT2220//Inner Mongolia Autonomous Region Higher Education Institutions Innovation Team Development Plan/ ; }, mesh = {Animals ; *Colorectal Neoplasms/metabolism/microbiology/pathology ; *Gastrointestinal Microbiome ; Humans ; Mice ; *Inflammation/metabolism/microbiology ; *Disease Models, Animal ; Male ; Female ; Metabolomics/methods ; Metabolome ; Middle Aged ; Dextran Sulfate ; Dysbiosis/microbiology/metabolism ; Aged ; Feces/microbiology ; }, abstract = {Colorectal cancer (CRC) arises from aberrant mutations in colorectal cells, frequently linked to chronic inflammation. This study integrated human gut metagenome analysis with an azoxymethane and dextran sulfate sodium-induced CRC mouse model to investigate the dynamics of inflammation, gut microbiota, and metabolomic profiles throughout tumorigenesis. The analysis of stool metagenome data from 30 healthy individuals and 40 CRC patients disclosed a significant escalation in both gut microbiota diversity and abundance in CRC patients compared to healthy individuals (p < 0.05). Marked structural disparities were identified between the gut microbiota of healthy individuals and those with CRC (p < 0.05), characterized by elevated levels of clostridia and diminished bifidobacteria in CRC patients (p < 0.05). In the mouse model, CRC mice exhibited distinct gut microbiota structures and metabolite signatures at early and advanced tumor stages, with subtle variations noted during the intermediate phase. Additionally, inflammatory marker levels increased progressively during tumor development in CRC mice, in contrast to their stable levels in healthy counterparts. These findings suggest that persistent inflammation might precipitate gut dysbiosis and altered microbial metabolism. Collectively, this study provides insights into the interplay between inflammation, gut microbiota, and metabolite changes during CRC progression, offering potential biomarkers for diagnosis. While further validation with larger cohorts is warranted, the data obtained support the development of CRC prevention and diagnosis strategies.}, }
@article {pmid39456772, year = {2024}, author = {Vilà-Quintana, L and Fort, E and Pardo, L and Albiol-Quer, MT and Ortiz, MR and Capdevila, M and Feliu, A and Bahí, A and Llirós, M and García-Velasco, A and Morell Ginestà, M and Laquente, B and Pozas, D and Moreno, V and Garcia-Gil, LJ and Duell, EJ and Pimenoff, VN and Carreras-Torres, R and Aldeguer, X}, title = {Metagenomic Study Reveals Phage-Bacterial Interactome Dynamics in Gut and Oral Microbiota in Pancreatic Diseases.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456772}, issn = {1422-0067}, support = {201912-31//Fundaci&#xf3; la Marat&#xf3; de TV3/ ; 9986//European Molecular Biology Organization/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Metagenomics/methods ; *Bacteriophages/genetics ; *Feces/microbiology ; Pancreatic Neoplasms/microbiology/metabolism ; Male ; Mouth/microbiology ; Saliva/microbiology/metabolism ; Female ; Middle Aged ; Carcinoma, Pancreatic Ductal/microbiology/metabolism/virology ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Metagenome ; Pancreatitis, Chronic/microbiology/metabolism/virology ; Pancreatic Diseases/microbiology/metabolism/virology ; Aged ; Microbiota/genetics ; Adult ; }, abstract = {Individuals with pancreatic-related health conditions usually show lower diversity and different composition of bacterial and viral species between the gut and oral microbiomes compared to healthy individuals. We performed a thorough microbiome analysis, using deep shotgun sequencing of stool and saliva samples obtained from patients with chronic pancreatitis (CP), pancreatic ductal adenocarcinoma (PDAC), and healthy controls (HCs).We observed similar microbiota composition at the species level in both the gut and oral samples in PDAC patients compared to HCs, among which the most distinctive finding was that the abundance of oral-originated Fusobacterium nucleatum species did not differ between the oral and the gut samples. Moreover, comparing PDAC patients with HCs, Klebsiella oxytoca was significantly more abundant in the stool samples of PDAC patients, while Streptococcus spp. showed higher abundance in both the oral and stool samples of PDAC patients. Finally, the most important finding was the distinctive gut phage-bacterial interactome pattern among PDAC patients. CrAssphages, particularly Blohavirus, showed mutual exclusion with K. oxytoca species, while Burzaovirus showed co-occurrence with Enterobacteriaceae spp., which have been shown to be capable of inducing DNA damage in human pancreatic cells ex vivo. The interactome findings warrant further mechanistic studies, as our findings may provide new insights into developing microbiota-based diagnostic and therapeutic methods for pancreatic diseases.}, }
@article {pmid39456745, year = {2024}, author = {Chen, Y and Chen, Z and Li, X and Malik, K and Li, C}, title = {Metagenomic Analysis: Alterations of Soil Microbial Community and Function due to the Disturbance of Collecting Cordyceps sinensis.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456745}, issn = {1422-0067}, support = {2021-SF-A4//Major Science and Technology Project of Qinghai Province/ ; LHZX-2022-01//Chinese Academy of Sciences-People's Government of Qinghai Province on Sanjiangyuan National Park/ ; &#x3014;2021&#x3015;794//Gansu Province Grassland Monitoring and Evaluation Technology Support Project of Gansu Province Forestry and Grassland Administration/ ; }, mesh = {*Soil Microbiology ; *Cordyceps/genetics/metabolism/growth &amp; development ; *Metagenomics/methods ; *Microbiota/genetics ; Archaea/genetics/metabolism/classification ; Bacteria/genetics/classification/metabolism ; Metagenome ; Soil/chemistry ; }, abstract = {Soil microorganisms are critical to the occurrence of Cordyceps sinensis (Chinese Cordyceps), a medicinal fungi used in Traditional Chinese Medicine. The over-collection of Chinese Cordyceps has caused vegetation degradation and impacted the sustainable occurrence of Cordyceps. The effects of Chinese Cordyceps collection on soil microorganisms have not been reported. Metagenomic analysis was performed on the soil of collecting and non-collecting areas of production and non-production areas, respectively. C. sinensis collection showed no alteration in alpha-diversity but significantly affected beta-diversity and the community composition of soil microorganisms. In Cordyceps production, Thaumarchaeota and Crenarchaeota were identified as the dominant archaeal phyla. DNA repair, flagellar assembly, propionate metabolism, and sulfur metabolism were affected in archaea, reducing the tolerance of archaea in extreme habitats. Proteobacteria, Actinobacteria, Acidobacteria, Verrucomicrobia, and Nitrospirae were identified as the dominant bacterial phyla. The collection of Chinese Cordyceps enhanced the bacterial biosynthesis of secondary metabolites and suppressed ribosome and carbon metabolism pathways in bacteria. A more complex microbial community relationship network in the Chinese Cordyceps production area was found. The changes in the microbial community structure were closely related to C, N, P and enzyme activities. This study clarified soil microbial community composition and function in the Cordyceps production area and established that collection clearly affects the microbial community function by altering microbial community structure. Therefore, it would be important to balance the relationship between cordyceps production and microbiology.}, }
@article {pmid39456741, year = {2024}, author = {He, H and Fang, C and Liu, L and Li, M and Liu, W}, title = {Environmental Driving of Adaptation Mechanism on Rumen Microorganisms of Sheep Based on Metagenomics and Metabolomics Data Analysis.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456741}, issn = {1422-0067}, support = {No. 2021YFD1600702//the National Key Research and Development Program of China/ ; }, mesh = {Animals ; *Rumen/microbiology/metabolism ; Sheep/microbiology ; *Metabolomics/methods ; *Metagenomics/methods ; *Gastrointestinal Microbiome ; Adaptation, Physiological ; Metabolome ; Metagenome ; Altitude ; }, abstract = {Natural or artificial selection causes animals to adapt to their environment. The adaptive changes generated by the rumen population and metabolism form the basis of ruminant evolution. In particular, the adaptive drive for environmental adaptation reflects the high-quality traits of sheep that have migrated from other places or have been distant from their origins for a long time. The Hu sheep is the most representative sheep breed in the humid and low-altitude environments (Tai Lake region) in East Asia and has been widely introduced into the arid and high-altitude environments (Tibetan Plateau and Hotan region), resulting in environmental adaptive changes in the Hu sheep. In this study, a joint analysis of the rumen microbial metagenome and metabolome was conducted on Hu sheep from different regions (area of origin and area of introduction) with the objective of investigating the quality traits of Hu sheep and identifying microorganisms that influence the adaptive drive of ruminants. The results demonstrated that the growth performance of Hu sheep was altered due to changes in rumen tissue and metabolism following their introduction to the arid area at relatively high altitude. Metagenomic and metabolomic analyses (five ramsper area) revealed that 3580 different microorganisms and 732 different metabolites were identified in the rumen fluid of arid sheep. Among these, the representative upregulated metabolites were 4,6-isocanedione, methanesulfonic acid and N2-succinyl-L-arginine, while the dominant microorganism was Prevotella ruminicola. The downregulated metabolites were identified as campesterol, teprenone and dihydroclavaminic acid, while the disadvantaged microorganisms were Dialister_succinatiphilus, Prevotella_sp._AGR2160, Prevotella_multisaccharivorax and Selenomonas_bovis. The results of the Pearson analysis indicated that the rumen microbiota and metabolite content of sheep were significantly altered and highly correlated following their relocation from a humid lowland to an arid upland. In particular, the observed changes in rumen microorganisms led to an acceleration of body metabolism, rendering sheep highly adaptable to environmental stress. Prevotella_ruminicola was identified as playing an important role in this process. These findings provide insights into the environmental adaptation mechanisms of sheep.}, }
@article {pmid39456706, year = {2024}, author = {Adnane, M and Chapwanya, A}, title = {Microbial Gatekeepers of Fertility in the Female Reproductive Microbiome of Cattle.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456706}, issn = {1422-0067}, mesh = {Animals ; Cattle ; Female ; *Fertility ; *Microbiota ; Reproduction ; Dysbiosis/microbiology ; Genitalia, Female/microbiology ; }, abstract = {This review paper delves into the intricate relationship between the genital microbiome and fertility outcomes in livestock, with a specific focus on cattle. Drawing upon insights derived from culture-independent metagenomics studies, the paper meticulously examines the composition and dynamics of the genital microbiome. Through advanced techniques such as high-throughput sequencing, the review illuminates the temporal shifts in microbial communities and their profound implications for reproductive health. The analysis underscores the association between dysbiosis-an imbalance in microbial communities-and the development of reproductive diseases, shedding light on the pivotal role of microbial gatekeepers in livestock fertility. Furthermore, the paper emphasizes the need for continued exploration of uncharted dimensions of the female reproductive microbiome to unlock new insights into its impact on fertility. By elucidating the complex interplay between microbial communities and reproductive health, this review underscores the importance of innovative strategies aimed at enhancing fertility and mitigating reproductive diseases in livestock populations.}, }
@article {pmid39456701, year = {2024}, author = {Yan, K and Sun, X and Fan, C and Wang, X and Yu, H}, title = {Unveiling the Role of Gut Microbiota and Metabolites in Autoimmune Thyroid Diseases: Emerging Perspectives.}, journal = {International journal of molecular sciences}, volume = {25}, number = {20}, pages = {}, pmid = {39456701}, issn = {1422-0067}, support = {82160154, 81670844//National Natural Science Foundation Project of China/ ; QKH-PTRC-GCC[2023]041//The Hundred-level Innovative Talent Foundation of Guizhou Province/ ; 18-ZY-001//The Program for Excellent Young Talents of Zunyi Medical University/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Animals ; Graves Disease/microbiology/metabolism/immunology ; Autoimmune Diseases/microbiology/metabolism ; Thyroid Hormones/metabolism ; Hashimoto Disease/microbiology/metabolism/immunology ; Thyroid Gland/metabolism/microbiology ; Fatty Acids, Volatile/metabolism ; }, abstract = {Autoimmune thyroid diseases (AITDs) are among the most prevalent organ-specific autoimmune disorders, with thyroid hormones playing a pivotal role in the gastrointestinal system's structure and function. Emerging evidence suggests a link between AITDs and the gut microbiome, which is a diverse community of organisms that are essential for digestion, absorption, intestinal homeostasis, and immune defense. Recent studies using 16S rRNA and metagenomic sequencing of fecal samples from AITD patients have revealed a significant correlation between a gut microbiota imbalance and the severity of AITDs. Progress in animal models of autoimmune diseases has shown that intervention in the gut microbiota can significantly alter the disease severity. The gut microbiota influences T cell subgroup differentiation and modulates the pathological immune response to AITDs through mechanisms involving short-chain fatty acids (SCFAs), lipopolysaccharides (LPSs), and mucosal immunity. Conversely, thyroid hormones also influence gut function and microbiota composition. Thus, there is a bidirectional relationship between the thyroid and the gut ecosystem. This review explores the pathogenic mechanisms of the gut microbiota and its metabolites in AITDs, characterizes the gut microbiota in Graves' disease (GD) and Hashimoto's thyroiditis (HT), and examines the interactions between the gut microbiota, thyroid hormones, T cell differentiation, and trace elements. The review aims to enhance understanding of the gut microbiota-thyroid axis and proposes novel approaches to mitigate AITD severity through gut microbiota modulation.}, }
@article {pmid39453910, year = {2024}, author = {Mondal, N and Dutta, S and Chatterjee, S and Sarkar, J and Mondal, M and Roy, C and Chakraborty, R and Ghosh, W}, title = {Aquificae overcomes competition by archaeal thermophiles, and crowding by bacterial mesophiles, to dominate the boiling vent-water of a Trans-Himalayan sulfur-borax spring.}, journal = {PloS one}, volume = {19}, number = {10}, pages = {e0310595}, pmid = {39453910}, issn = {1932-6203}, mesh = {*Hot Springs/microbiology ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/metabolism ; *Sulfur/metabolism ; Archaea/genetics/metabolism ; Phylogeny ; Microbiota/genetics ; Boron/metabolism ; Water Microbiology ; }, abstract = {Trans-Himalayan hot spring waters rich in boron, chlorine, sodium and sulfur (but poor in calcium and silicon) are known based on PCR-amplified 16S rRNA gene sequence data to harbor high diversities of infiltrating bacterial mesophiles. Yet, little is known about the community structure and functions, primary productivity, mutual interactions, and thermal adaptations of the microorganisms present in the steaming waters discharged by these geochemically peculiar spring systems. We revealed these aspects of a bacteria-dominated microbiome (microbial cell density ~8.5 × 104 mL-1; live:dead cell ratio 1.7) thriving in the boiling (85°C) fluid vented by a sulfur-borax spring called Lotus Pond, situated at 4436 m above the mean sea-level, in the Puga valley of eastern Ladakh, on the Changthang plateau. Assembly, annotation, and population-binning of >15-GB metagenomic sequence illuminated the numeral predominance of Aquificae. While members of this phylum accounted for 80% of all 16S rRNA-encoding reads within the metagenomic dataset, 14% of such reads were attributed to Proteobacteria. Post assembly, only 25% of all protein-coding genes identified were attributable to Aquificae, whereas 41% was ascribed to Proteobacteria. Annotation of metagenomic reads encoding 16S rRNAs, and/or PCR-amplified 16S rRNA genes, identified 163 bacterial genera, out of which 66 had been detected in past investigations of Lotus Pond's vent-water via 16S amplicon sequencing. Among these 66, Fervidobacterium, Halomonas, Hydrogenobacter, Paracoccus, Sulfurihydrogenibium, Tepidimonas, Thermus and Thiofaba (or their close phylogenomic relatives) were presently detected as metagenome-assembled genomes (MAGs). Remarkably, the Hydrogenobacter related MAG alone accounted for ~56% of the entire metagenome, even though only 15 out of the 66 genera consistently present in Lotus Pond's vent-water have strains growing in the laboratory at >45°C, reflecting the continued existence of the mesophiles in the ecosystem. Furthermore, the metagenome was replete with genes crucial for thermal adaptation in the context of Lotus Pond's geochemistry and topography. In terms of sequence similarity, a majority of those genes were attributable to phylogenetic relatives of mesophilic bacteria, while functionally they rendered functions such as encoding heat shock proteins, molecular chaperones, and chaperonin complexes; proteins controlling/modulating/inhibiting DNA gyrase; universal stress proteins; methionine sulfoxide reductases; fatty acid desaturases; different toxin-antitoxin systems; enzymes protecting against oxidative damage; proteins conferring flagellar structure/function, chemotaxis, cell adhesion/aggregation, biofilm formation, and quorum sensing. The Lotus Pond Aquificae not only dominated the microbiome numerically but also acted potentially as the main primary producers of the ecosystem, with chemolithotrophic sulfur oxidation (Sox) being the fundamental bioenergetic mechanism, and reductive tricarboxylic acid (rTCA) cycle the predominant carbon fixation pathway. The Lotus Pond metagenome contained several genes directly or indirectly related to virulence functions, biosynthesis of secondary metabolites including antibiotics, antibiotic resistance, and multi-drug efflux pumping. A large proportion of these genes being attributable to Aquificae, and Proteobacteria (very few were ascribed to Archaea), it could be worth exploring in the future whether antibiosis helped the Aquificae overcome niche overlap with other thermophiles (especially those belonging to Archaea), besides exacerbating the bioenergetic costs of thermal endurance for the mesophilic intruders of the ecosystem.}, }
@article {pmid39450991, year = {2024}, author = {Du, S and Tong, X and Leung, MHY and Betts, RJ and Woo, AC and Bastien, P and Misra, N and Aguilar, L and Clavaud, C and Lee, PKH}, title = {Chronic exposure to polycyclic aromatic hydrocarbons alters skin virome composition and virus-host interactions.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39450991}, issn = {1751-7370}, support = {7020049//L'Or&#xe9;al Research &amp; Innovation, Pudong, China, and the City University of Hong Kong/ ; //L'Or&#xe9;al Research &amp; Innovation, Pudong, China/ ; 7020049//City University of Hong Kong/ ; }, mesh = {*Skin/virology/microbiology ; Female ; Humans ; *Virome ; *Polycyclic Aromatic Hydrocarbons/metabolism ; *Microbiota/drug effects ; *Bacteria/genetics/classification/isolation &amp; purification/drug effects ; Viruses/classification/drug effects/genetics/isolation &amp; purification ; China ; Adult ; Metagenome ; Host Microbial Interactions ; Air Pollutants ; }, abstract = {Exposure to polycyclic aromatic hydrocarbons (PAHs) in polluted air influences the composition of the skin microbiome, which in turn is associated with altered skin phenotypes. However, the interactions between PAH exposure and viromes are unclear. This study aims to elucidate how PAH exposure affects the composition and function of skin viruses, their role in shaping the metabolism of bacterial hosts, and the subsequent effects on skin phenotype. We analyzed metagenomes from cheek skin swabs collected from 124 Chinese women in our previous study and found that the viruses associated with the two microbiome cutotypes had distinct diversities, compositions, functions, and lifestyles following PAH exposure. Moreover, exposure to high concentrations of PAHs substantially increased interactions between viruses and certain biodegrading bacteria. Under high-PAH exposure, the viruses were enriched in xenobiotic degradation functions, and there was evidence suggesting that the insertion of bacteriophage-encoded auxiliary metabolic genes into hosts aids biodegradation. Under low-PAH exposure conditions, the interactions followed the "Piggyback-the-Winner" model, with Cutibacterium acnes being "winners," whereas under high-PAH exposure, they followed the "Piggyback-the-Persistent" model, with biodegradation bacteria being "persistent." These findings highlight the impact of air pollutants on skin bacteria and viruses, their interactions, and their modulation of skin health. Understanding these intricate relationships could provide insights for developing targeted strategies to maintain skin health in polluted environments, emphasizing the importance of mitigating pollutant exposure and harnessing the potential of viruses to help counteract the adverse effects.}, }
@article {pmid39450961, year = {2024}, author = {Sansonetti, PJ and Doré, J}, title = {[The human microbiome proofed by the Anthropocene: from correlation to causality and intervention].}, journal = {Medecine sciences : M/S}, volume = {40}, number = {10}, pages = {757-765}, doi = {10.1051/medsci/2024121}, pmid = {39450961}, issn = {1958-5381}, mesh = {Humans ; *Microbiota/physiology ; Animals ; *Gastrointestinal Microbiome/physiology ; *Dysbiosis/microbiology ; Biodiversity ; Causality ; Climate Change ; }, abstract = {The deleterious effects of human activities on biodiversity in the vegetal and animal world, and on climate changes are now well-established facts. However, little is yet known on the impact of human activities on microbial diversity on the planet and more specifically on the human microbiota Large implementation of metagenomics allows exaustive microbial cataloguing with broad spatio-temporal resolution of human microbiota. A reduction in bacterial richness and diversity in the human microbiota, particularly in the intestinal tract, is now established and particularly obvious in the most industrialized regions of the planet. Massive, uncontrolled use of antibiotics, drastic changes in traditional food habits and some elements of the "global exposome" that remain to identify are usually considered as stressors accounting for this situation of "missing microbes". As a consequence, a dysbiotic situation develops, a "dysbiosis" being characterized by the erosion of the central core of shared bacterial species across individuals and the development of opportunistic "pathobionts" in response to a weaker barrier capacity of these impoverished microbiota. The current challenge is to establish a causality link between the extension of these dysbiotic situations and the steady emergence of epidemic, non-communicable diseases such as asthma, allergy, obesity, diabetes, autoimmune diseases and some cancers. Experimental animal models combined with controlled, prospective clinical interventions are in demand to consolidate causality links, with the understanding that in the deciphering of the mechanisms of alteration of the human-microbiome symbiosis resides a novel exciting chapter of medicine: "microbial medicine".}, }
@article {pmid39449105, year = {2024}, author = {Rahlff, J and Westmeijer, G and Weissenbach, J and Antson, A and Holmfeldt, K}, title = {Surface microlayer-mediated virome dissemination in the Central Arctic.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {218}, pmid = {39449105}, issn = {2049-2618}, support = {2023-03310_VR//Vetenskapsr&#xe5;det/ ; CTS20:128//Carl Tryggers Foundation/ ; 2022-04340//Vetenskapsr&#xe5;det/ ; 224665/WT_/Wellcome Trust/United Kingdom ; /WT_/Wellcome Trust/United Kingdom ; RA3432/1-1, project number: 446702140//Deutsche Forschungsgemeinschaft/ ; }, mesh = {Arctic Regions ; *Virome ; Viruses/classification/genetics/isolation &amp; purification ; Greenland ; Genome, Viral/genetics ; Water Microbiology ; Metagenomics/methods ; Ecosystem ; Microbiota ; }, abstract = {BACKGROUND: Aquatic viruses act as key players in shaping microbial communities. In polar environments, they face significant challenges such as limited host availability and harsh conditions. However, due to the restricted accessibility of these ecosystems, our understanding of viral diversity, abundance, adaptations, and host interactions remains limited.<br><br>RESULTS: To fill this knowledge gap, we studied viruses from atmosphere-close aquatic ecosystems in the Central Arctic and Northern Greenland. Aquatic samples for virus-host analysis were collected from ~60&#xa0;cm depth and the submillimeter surface microlayer (SML) during the Synoptic Arctic Survey 2021 on icebreaker Oden in the&#xa0;Arctic summer. Water was sampled from a melt pond and open water before undergoing size-fractioned filtration, followed by genome-resolved metagenomic and cultivation investigations. The prokaryotic diversity in the melt pond was considerably lower compared to that of&#xa0;open water. The melt pond was dominated by a Flavobacterium sp. and Aquiluna sp., the latter having a relatively small genome size of 1.2&#xa0;Mb and the metabolic potential to generate ATP using the phosphate acetyltransferase-acetate kinase pathway. Viral diversity on the host fraction (0.2-5&#xa0;&#xb5;m) of the melt pond was strikingly limited compared to&#xa0;that of open water. From the&#xa0;1154 viral operational taxonomic units (vOTUs), of which two-thirds were predicted bacteriophages, 17.2% encoded for auxiliary metabolic genes (AMGs) with metabolic functions. Some AMGs like glycerol-3-phosphate cytidylyltransferase and ice-binding like proteins might serve to provide&#xa0;cryoprotection for the host. Prophages were often associated with SML genomes, and two active prophages of new viral genera from the Arctic SML strain Leeuwenhoekiella aequorea Arc30 were induced. We found evidence that vOTU abundance in the SML compared to&#xa0;that of ~60&#xa0;cm depth was more positively correlated with the distribution of a vOTU across five different Arctic stations.<br><br>CONCLUSIONS: The results indicate that viruses employ elaborate strategies to endure in extreme, host-limited environments. Moreover, our observations suggest that the immediate air-sea interface serves as a platform for viral distribution in the Central Arctic. Video Abstract.}, }
@article {pmid39448846, year = {2024}, author = {Wu, Z and Liu, S and Ni, J}, title = {Metagenomic characterization of viruses and mobile genetic elements associated with the DPANN archaeal superphylum.}, journal = {Nature microbiology}, volume = {9}, number = {12}, pages = {3362-3375}, pmid = {39448846}, issn = {2058-5276}, support = {U2240205//National Natural Science Foundation of China (National Science Foundation of China)/ ; 51721006//National Natural Science Foundation of China (National Science Foundation of China)/ ; 92047303//National Natural Science Foundation of China (National Science Foundation of China)/ ; 423B2703//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Archaea/genetics/virology ; *Metagenomics ; *Interspersed Repetitive Sequences ; *Archaeal Viruses/genetics/classification ; *Clustered Regularly Interspaced Short Palindromic Repeats ; Phylogeny ; Metagenome ; Genome, Viral/genetics ; Genome, Archaeal ; Virome/genetics ; Symbiosis ; }, abstract = {The archaeal superphylum DPANN (an acronym formed from the initials of the first five phyla discovered: Diapherotrites, Parvarchaeota, Aenigmarchaeota, Nanohaloarchaeota and Nanoarchaeota) is a group of ultrasmall symbionts able to survive in extreme ecosystems. The diversity and dynamics between DPANN archaea and their virome remain largely unknown. Here we use a metagenomic clustered regularly interspaced short palindromic repeats (CRISPR) screening approach to identify 97 globally distributed, non-redundant viruses and unclassified mobile genetic elements predicted to infect hosts across 8 DPANN phyla, including 7 viral groups not previously characterized. Genomic analysis suggests a diversity of viral morphologies including head-tailed, tailless icosahedral and spindle-shaped viruses with the potential to establish lytic, chronic or lysogenic infections. We also find evidence of a virally encoded Cas12f1 protein (probably originating from uncultured DPANN archaea) and a mini-CRISPR array, which could play a role in modulating host metabolism. Many metagenomes have virus-to-host ratios >10, indicating that DPANN viruses play an important role in controlling host populations. Overall, our study illuminates the underexplored diversity, functional repertoires and host interactions of the DPANN virome.}, }
@article {pmid39448159, year = {2025}, author = {Diaz, M and Aird, H and Le Viet, T and Gutiérrez, AV and Larke-Mejia, N and Omelchenko, O and Moragues-Solanas, L and Fritscher, J and Som, N and McLauchlin, J and Hildebrand, F and Jørgensen, F and Gilmour, M}, title = {Microbial composition and dynamics in environmental samples from a ready-to-eat food production facility with a long-term colonization of Listeria monocytogenes.}, journal = {Food microbiology}, volume = {125}, number = {}, pages = {104649}, doi = {10.1016/j.fm.2024.104649}, pmid = {39448159}, issn = {1095-9998}, mesh = {*Listeria monocytogenes/genetics/isolation &amp; purification/growth &amp; development/classification ; *Fast Foods/microbiology ; Food Microbiology ; Microbiota ; Bacteria/genetics/classification/isolation &amp; purification/growth &amp; development ; Environmental Microbiology ; Metagenomics ; Pseudomonas fluorescens/genetics/isolation &amp; purification/growth &amp; development/classification ; Food Contamination/analysis ; }, abstract = {Listeria monocytogenes is a foodborne pathogen of significant concern for the food industry due to its remarkable ability to persist through safety control efforts, posing a subsequent health threat to consumers. Understanding the microbial communities coexisting with L. monocytogenes in food processing environments provides insights into its persistence mechanisms. We investigated the microbial communities on non-food contact surfaces in a facility producing ready-to-eat foods, known to harbour a ST121 L. monocytogenes strain over multiple years. A 10-week sampling period was coordinated with the company and public health authorities. Metagenomic analysis revealed a stable microbial composition dominated by Pseudomonas fluorescens. While highly related populations were present in high-care production zones, distinctive taxa characteristic of specific areas were observed (e.g., Sphingomonas aerolata). Although Listeria spp. were not detected in metagenomes, they were detected in cultured samples, suggesting low relative abundance in factory settings. The findings suggest that a stable resident microbiota, with distinct adaptations to different areas within the factory, was selected for by their collective ability to survive control efforts in this environment. Listeria spp. was a member of this microbial community, albeit at low abundance, and may likewise benefit from the mutualism of the overall microbial community.}, }
@article {pmid39448157, year = {2025}, author = {Hou, S and Liang, Z and Wu, Q and Cai, Q and Weng, Q and Guo, W and Ni, L and Lv, X}, title = {Metagenomics reveals the differences in flavor quality of rice wines with Hongqu and Maiqu as the fermentation starters.}, journal = {Food microbiology}, volume = {125}, number = {}, pages = {104647}, doi = {10.1016/j.fm.2024.104647}, pmid = {39448157}, issn = {1095-9998}, mesh = {*Wine/analysis/microbiology ; *Fermentation ; *Oryza/microbiology/chemistry ; *Flavoring Agents/metabolism/chemistry/analysis ; *Taste ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Metagenomics ; *Volatile Organic Compounds/analysis/metabolism ; Biogenic Amines/analysis/metabolism ; Microbiota ; Fungi/classification/genetics/metabolism/isolation &amp; purification ; }, abstract = {Chinese rice wine (CRW) is an alcoholic beverage made mainly from rice or grain through saccharification and fermentation with Jiuqu (starter). Jiuqu makes an important contribution to the formation of the flavor characteristics of rice wine. Hongqu and Maiqu are two kinds of Jiuqu commonly used in CRW brewing. This study compared the microbial community, biogenic amines (BAs), and volatile flavor components (VFCs) of two types of rice wine brewed with Hongqu and Maiqu as fermentation agents. The results showed that the amino acid content of rice wine fermented with Maiqu (MQW) was significantly lower than that of rice wine fermented with Hongqu (HQW). On the contrary, the majority of BAs in MQW were significantly higher than those in HQW, except for putrescine. Multivariate statistical analysis indicated that most of the VFCs detected were enriched in HQW, while ethyl 3-phenylpropanoate and citronellol were enriched in MQW. The results of metagenomic analysis showed that Weissiella, Enterobacter, Leuconostoc, Kosakonia, Saccharomyces, Aspergilus and Monascus were identified as the predominant microbial genera in HQW brewing process, while Saccharopolyspora, Lactococcus, Enterobacter, Leuconostoc, Kosakonia, Pediococcus, Pantoea, Saccharomyces, Aspergillus, Lichtheimia and Nakaseomyces were the predominant microbial genera in MQW brewing. In addition, some VFCs and BAs were strongly correlated with dominant microbial genera in HQW and MQW brewing. Bioinformatics analysis showed that the abundance of genes involved in BAs synthesis in MQW brewing was much higher than that in HQW brewing, while the abundances of genes related to metabolic pathway of characteristic VFCs in HQW brewing were obviously higher than those in MQW, which explained the differences in flavor quality between HQW and MQW from the perspective of microbial genes. Collectively, these findings provide scientific evidence for elucidating the contribution of different microbial genera to the formation of flavor quality of CRW, and is helpful for screening beneficial microbes to enhance flavor quality and drinking comfort of CRW.}, }
@article {pmid39448156, year = {2025}, author = {Ren, D and Liu, S and Qin, H and Huang, M and Bai, X and Han, X and Zhang, S and Mao, J}, title = {Metagenomics-based insights into the microbial community dynamics and flavor development potentiality of artificial and natural pit mud.}, journal = {Food microbiology}, volume = {125}, number = {}, pages = {104646}, doi = {10.1016/j.fm.2024.104646}, pmid = {39448156}, issn = {1095-9998}, mesh = {*Metagenomics ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification/growth &amp; development ; *Flavoring Agents/metabolism ; *Microbiota ; Fermentation ; Metagenome ; Taste ; Fermented Foods/microbiology ; Brassica/microbiology ; Food Microbiology ; }, abstract = {Strong-flavor Baijiu (SFB) production has relied on pit mud (PM) as a starter culture. The maturation time of natural PM (NPM) is about 30 years, so artificial PM (APM) with a shorter maturation time has attracted widespread attention. This study reveals the microbial and functional dissimilarities of APM and NPM, and helps to elucidate the different metabolic roles of microbes during substrate degradation and flavor formation. Significant differences in the microbial community were observed between APM and NPM, manifesting as variations in the abundance of core microorganisms. Total of 187 high-quality metagenome-assembled genomes (MAGs) were obtained based on the metagenomic binning technology, mainly including Firmicutes (n = 106), Bacteroidota (n = 15) and Chloroflexota (n = 14). Furthermore, the relative concentration of flavor compounds in 4-year APM was similar to those in 30-year NPM, but different from those in 100-year NPMs. Methanosarcina, Methanobacterium, Methanoculleus, Anaerolineae bacterium and Aminobacterium were the key bacteria responsible for the flavor differences. From a functional perspective, amino acid and carbohydrate metabolism were key functions of PM microbial, and showed differences between APM and NPM. Finally, substrate degradation and flavor generation pathways were found to exist in multiple microorganisms. Combine the relative abundance of microorganisms with the absolute abundance of enzymes, Clostridium, Lactobacillus, Petrimonas, Methanoculleus, Prevotella, Methanobacterium, Methanosarcina, Methanothrix, Proteiniphilum, Bellilinea, Anaerolinea, Anaeromassilibacillus, Syntrophomonas and Brevefilum were identified as the key microorganisms in APM and NPM.}, }
@article {pmid39447963, year = {2025}, author = {Lee, S and Arefaine, B and Begum, N and Stamouli, M and Witherden, E and Mohamad, M and Harzandi, A and Zamalloa, A and Cai, H and Williams, R and Curtis, MA and Edwards, LA and Chokshi, S and Mardinoglu, A and Proctor, G and Moyes, DL and McPhail, MJ and Shawcross, DL and Uhlen, M and Shoaie, S and Patel, VC}, title = {Oral-gut microbiome interactions in advanced cirrhosis: characterisation of pathogenic enterotypes and salivatypes, virulence factors and antimicrobial resistance.}, journal = {Journal of hepatology}, volume = {82}, number = {4}, pages = {622-633}, doi = {10.1016/j.jhep.2024.09.046}, pmid = {39447963}, issn = {1600-0641}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Liver Cirrhosis/microbiology/complications ; Male ; *Virulence Factors ; Female ; Middle Aged ; *Saliva/microbiology ; Aged ; *Mouth/microbiology ; Adult ; Drug Resistance, Bacterial ; }, abstract = {BACKGROUND &amp; AIMS: Cirrhosis complications are often triggered by bacterial infections with multidrug-resistant organisms. Alterations in the gut and oral microbiome in decompensated cirrhosis (DC) influence clinical outcomes. We interrogated: (i) gut and oral microbiome community structures, (ii) virulence factors (VFs) and antimicrobial resistance genes (ARGs) and (iii) oral-gut microbial overlap in patients with differing cirrhosis severity.<br><br>METHODS: Fifteen healthy controls (HCs), as well as 26 patients with stable cirrhosis (SC), 46 with DC, 14 with acute-on-chronic liver failure (ACLF) and 14 with severe infection without cirrhosis participated. Metagenomic sequencing was undertaken on paired saliva and faecal samples. 'Salivatypes' and 'enterotypes' based on genera clustering were assessed against cirrhosis severity and clinical parameters. VFs and ARGs were evaluated in oral and gut niches, and distinct resistotypes identified.<br><br>RESULTS: Salivatypes and enterotypes revealed a greater proportion of pathobionts with concomitant reduction in autochthonous genera with increasing cirrhosis severity and hyperammonaemia. Increasing overlap between oral and gut microbiome communities was observed in DC and ACLF vs. SC and HCs, independent of antimicrobial, beta-blocker and gastric acid-suppressing therapies. Two distinct gut microbiome clusters harboured genes encoding for the PTS (phosphoenolpyruvate:sugar phosphotransferase system) and other VFs in DC and ACLF. Substantial ARGs (oral: 1,218 and gut: 672) were detected (575 common to both sites). The cirrhosis resistome was distinct, with three oral and four gut resistotypes identified, respectively.<br><br>CONCLUSIONS: The degree of oral-gut microbial community overlap, frequency of VFs and ARGs all increase significantly with cirrhosis severity, with progressive dominance of pathobionts and loss of commensals. Despite similar antimicrobial exposure, patients with DC and ACLF have reduced microbial richness compared to patients with severe infection without cirrhosis, supporting the additive pathobiological effect of cirrhosis.<br><br>IMPACT AND IMPLICATIONS: This research underscores the crucial role of microbiome alterations in the progression of cirrhosis in an era of escalating multidrug resistant infections, highlighting the association and potential impact of increased oral-gut microbial overlap, virulence factors, and antimicrobial resistance genes on clinical outcomes. These findings are particularly significant for patients with decompensated cirrhosis and acute-on-chronic liver failure, as they reveal the intricate relationship between microbiome alterations and cirrhosis complications. This is relevant in the context of multidrug-resistant organisms and reduced oral-gut microbial diversity that exacerbate cirrhosis severity, drive hepatic decompensation and complicate treatment. For practical applications, these insights could guide the development of targeted microbiome-based therapeutics and personalised antimicrobial regimens for patients with cirrhosis to mitigate infectious complications and improve clinical outcomes.}, }
@article {pmid39446191, year = {2024}, author = {Shi, K and Liu, Q and Ji, Q and He, Q and Zhao, XM}, title = {MicroHDF: predicting host phenotypes with metagenomic data using a deep forest-based framework.}, journal = {Briefings in bioinformatics}, volume = {25}, number = {6}, pages = {}, pmid = {39446191}, issn = {1477-4054}, support = {62162019//National Natural Science Foundation of China/ ; 2018SHZDZX01//Shanghai Municipal Science and Technology Major Project/ ; //Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence/ ; //ZJLab/ ; //Guangxi Key Laboratory Fund of Embedded Technology and Intelligent System/ ; ZY22096025//Special Funds for Guiding Local Scientific and Technological Development by the Central Government/ ; YCSW2024357//Guilin University of Technology, Innovation Project of Guangxi Graduate Education/ ; }, mesh = {Humans ; *Phenotype ; *Deep Learning ; *Metagenomics/methods ; *Gastrointestinal Microbiome/genetics ; *Inflammatory Bowel Diseases/microbiology/genetics ; Autism Spectrum Disorder/genetics/microbiology ; Liver Cirrhosis/genetics/microbiology ; Computational Biology/methods ; Machine Learning ; Metagenome ; ROC Curve ; }, abstract = {The gut microbiota plays a vital role in human health, and significant effort has been made to predict human phenotypes, especially diseases, with the microbiota as a promising indicator or predictor with machine learning (ML) methods. However, the accuracy is impacted by a lot of factors when predicting host phenotypes with the metagenomic data, e.g. small sample size, class imbalance, high-dimensional features, etc. To address these challenges, we propose MicroHDF, an interpretable deep learning framework to predict host phenotypes, where a cascade layers of deep forest units is designed for handling sample class imbalance and high dimensional features. The experimental results show that the performance of MicroHDF is competitive with that of existing state-of-the-art methods on 13 publicly available datasets of six different diseases. In particular, it performs best with the area under the receiver operating characteristic curve of 0.9182 ± 0.0098 and 0.9469 ± 0.0076 for inflammatory bowel disease (IBD) and liver cirrhosis, respectively. Our MicroHDF also shows better performance and robustness in cross-study validation. Furthermore, MicroHDF is applied to two high-risk diseases, IBD and autism spectrum disorder, as case studies to identify potential biomarkers. In conclusion, our method provides an effective and reliable prediction of the host phenotype and discovers informative features with biological insights.}, }
@article {pmid39445812, year = {2024}, author = {Soueidan, A and Idiri, K and Becchina, C and Esparbès, P and Legrand, A and Le Bastard, Q and Montassier, E}, title = {Pooled analysis of oral microbiome profiles defines robust signatures associated with periodontitis.}, journal = {mSystems}, volume = {9}, number = {11}, pages = {e0093024}, pmid = {39445812}, issn = {2379-5077}, support = {RC 21_0250//Centre Hospitalier Universitaire de Nantes (CHU de Nantes)/ ; }, mesh = {Humans ; *Periodontitis/microbiology ; *Microbiota/genetics ; *Dysbiosis/microbiology ; Female ; *RNA, Ribosomal, 16S/genetics ; Adult ; Male ; Mouth/microbiology ; Middle Aged ; Metagenomics/methods ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {UNLABELLED: Oral microbial dysbiosis has been associated with periodontitis in studies using 16S rRNA gene sequencing analysis. However, this technology is not sufficient to consistently separate the bacterial species to species level, and reproducible oral microbiome signatures are scarce. Obtaining these signatures would significantly enhance our understanding of the underlying pathophysiological processes of this condition and foster the development of improved therapeutic strategies, potentially personalized to individual patients. Here, we sequenced newly collected samples from 24 patients with periodontitis, and we collected available oral microbiome data from 24 samples in patients with periodontitis and from 214 samples in healthy individuals (n = 262). Data were harmonized, and we performed a pooled analysis of individual patient data. By metagenomic sequencing of the plaque microbiome, we found microbial signatures for periodontitis and defined a periodontitis-related complex, composed by the most discriminative bacteria. A simple two-factor decision tree, based on Tannerella forsythia and Fretibacterium fastidiosum, was associated with periodontitis with high accuracy (area under the curve: 0.94). Altogether, we defined robust oral microbiome signatures relevant to the pathophysiology of periodontitis that can help define promising targets for microbiome therapeutic modulation when caring for patients with periodontitis.<br><br>IMPORTANCE: Oral microbial dysbiosis has been associated with periodontitis in studies using 16S rRNA gene sequencing analysis. However, this technology is not sufficient to consistently separate the bacterial species to species level, and reproducible oral microbiome signatures are scarce. Here, using ultra-deep metagenomic sequencing and machine learning tools, we defined a simple two-factor decision tree, based on Tannerella forsythia and Fretibacterium fastidiosum, that was highly associated with periodontitis. Altogether, we defined robust oral microbiome signatures relevant to the pathophysiology of periodontitis that can help define promising targets for microbiome therapeutic modulation when caring for patients with periodontitis.}, }
@article {pmid39444361, year = {2024}, author = {Bravo, JE and Slizovskiy, I and Bonin, N and Oliva, M and Noyes, N and Boucher, C}, title = {The TELCoMB Protocol for High-Sensitivity Detection of ARG-MGE Colocalizations in Complex Microbial Communities.}, journal = {Current protocols}, volume = {4}, number = {10}, pages = {e70031}, pmid = {39444361}, issn = {2691-1299}, support = {R01 AI141810/AI/NIAID NIH HHS/United States ; R01 AI173928/AI/NIAID NIH HHS/United States ; 1R01AI173928-01A1//National Institute of Allergy and Infectious Diseases/ ; 5R01AI141810-04//National Institute of Allergy and Infectious Diseases/ ; }, mesh = {*Microbiota/genetics ; Metagenomics/methods ; Interspersed Repetitive Sequences/genetics ; Drug Resistance, Bacterial/genetics ; Bacteria/genetics/drug effects/isolation &amp; purification/classification ; Genes, Bacterial/genetics ; }, abstract = {Understanding the genetic basis of antimicrobial resistance is crucial for developing effective mitigation strategies. One necessary step is to identify the antimicrobial resistance genes (ARGs) within a microbial population, referred to as the resistome, as well as the mobile genetic elements (MGEs) harboring ARGs. Although shotgun metagenomics has been successful in detecting ARGs and MGEs within a microbiome, it is limited by low sensitivity. Enrichment using cRNA biotinylated probes has been applied to address this limitation, enhancing the detection of rare ARGs and MGEs, especially when combined with long-read sequencing. Here, we present the TELCoMB protocol, a Snakemake workflow that elucidates resistome and mobilome composition and diversity and uncovers ARG-MGE colocalizations. The protocol supports both short- and long-read sequencing and does not require enrichment, making it versatile for various genomic data types. TELCoMB generates publication-ready figures and CSV files for comprehensive analysis, improving our understanding of antimicrobial resistance mechanisms and spread. © 2024 The Author(s). Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Installing TELCOMB Locally Alternate Protocol: Installing TELCOMB on a SLURM Cluster Basic Protocol 2: Data Preprocessing Basic Protocol 3: Calculation of Resistome Distribution and Composition Basic Protocol 4: Identification of ARG-MGE Colocalizations.}, }
@article {pmid39443951, year = {2024}, author = {Guo, W and Zhou, M and Li, F and Neves, ALA and Ma, T and Bi, S and Wang, W and Long, R and Guan, LL}, title = {Seasonal stability of the rumen microbiome contributes to the adaptation patterns to extreme environmental conditions in grazing yak and cattle.}, journal = {BMC biology}, volume = {22}, number = {1}, pages = {240}, pmid = {39443951}, issn = {1741-7007}, support = {31672453//National Natural Science Foundation of China/ ; 32402705//National Natural Science Foundation of China/ ; 2018F095R//Ministry of Alberta Agriculture and Forestry/ ; }, mesh = {Animals ; Cattle ; *Rumen/microbiology ; *Seasons ; *Gastrointestinal Microbiome/physiology ; Microbiota ; Adaptation, Physiological ; Bacteria/genetics/classification ; }, abstract = {BACKGROUND: The rumen microbiome plays an essential role in maintaining ruminants' growth and performance even under extreme environmental conditions, however, which factors influence rumen microbiome stability when ruminants are reared in such habitats throughout the year is unclear. Hence, the rumen microbiome of yak (less domesticated) and cattle (domesticated) reared on the Qinghai-Tibetan Plateau through the year were assessed to evaluate temporal changes in their composition, function, and stability.<br><br>RESULTS: Rumen fermentation characteristics and pH significantly shifted across seasons in both cattle and yak, but the patterns differed between the two ruminant species. Ruminal enzyme activity varied with season, and production of xylanase and cellulase was greater in yak compared to cattle in both fall and winter. The rumen bacterial community varied with season in both yak and cattle, with higher alpha diversity and similarity (beta diversity) in yak than cattle. The diversity indices of eukaryotic community did not change with season in both ruminant species, but higher similarity was observed in yak. In addition, the similarity of rumen microbiome functional community was higher in yak than cattle across seasons. Moreover, yak rumen microbiome encoded more genes (GH2 and GH3) related to cellulose and hemicellulose degradation compared to cattle, and a new enzyme family (GH160) gene involved in oligosaccharides was uniquely detected in yak rumen. The season affected microbiome attenuation and buffering values (stability), with higher buffering value in yak rumen microbiome than cattle. Positive correlations between antimicrobial resistance gene (dfrF) and CAZyme family (GH113) and microbiome stability were identified in yak, but such relationship was negatively correlated in cattle.<br><br>CONCLUSIONS: The findings of the potential of cellulose degradation, the relationship between rumen microbial stability and the abundance of functional genes varied differently across seasons and between yak and cattle provide insight into the mechanisms that may underpin their divergent adaptation patterns to the harsh climate of the Qinghai-Tibetan Plateau. These results lay a solid foundation for developing strategies to maintain and improve rumen microbiome stability and dig out the potential candidates for manufacturing lignocellulolytic enzymes in the yak rumen to enhance ruminants' performance under extreme environmental conditions.}, }
@article {pmid39443733, year = {2025}, author = {Hudobenko, J and Di Gesù, CM and Mooz, PR and Petrosino, J and Putluri, N and Ganesh, BP and Rebeles, K and Blixt, FW and Venna, VR and McCullough, LD}, title = {Maternal dysbiosis produces long-lasting behavioral changes in offspring.}, journal = {Molecular psychiatry}, volume = {30}, number = {5}, pages = {1847-1858}, pmid = {39443733}, issn = {1476-5578}, support = {R01 NS094543/NS/NINDS NIH HHS/United States ; RF1AG058463//U.S. Department of Health &amp; Human Services | NIH | National Institute on Aging (U.S. National Institute on Aging)/ ; MERIT Award//American Heart Association (American Heart Association, Inc.)/ ; R35NS132265//U.S. Department of Health &amp; Human Services | NIH | National Institute of Neurological Disorders and Stroke (NINDS)/ ; R35 NS132265/NS/NINDS NIH HHS/United States ; RF1 AG058463/AG/NIA NIH HHS/United States ; P30 CA125123/CA/NCI NIH HHS/United States ; }, mesh = {Animals ; Female ; Gastrointestinal Microbiome/physiology ; Pregnancy ; *Dysbiosis/microbiology/metabolism/complications/physiopathology ; Mice ; Mice, Inbred C57BL ; Prenatal Exposure Delayed Effects ; Behavior, Animal/physiology ; Anxiety ; Brain/metabolism ; Male ; Animals, Newborn ; Depression ; }, abstract = {Advanced maternal age (AMA) is defined as a pregnancy in a woman older than 35 years of age. AMA increases the risk for both maternal and neonatal complications, including miscarriage and stillbirth. AMA has also been linked to neurodevelopmental and neuropsychiatric disorders in the offspring. Recent studies have found that age-associated compositional shifts in the gut microbiota contribute to altered microbial metabolism and enhanced inflammation in the host. We investigated the specific contribution of the maternal microbiome on pregnancy outcomes and offspring behavior by recolonizing young female mice with aged female microbiome prior to pregnancy. We discovered that pre-pregnancy colonization of young dams with microbiome from aged female donors significantly increased fetal loss. There were significant differences in the composition of the gut microbiome in pups born from dams recolonized with aged female biome that persisted through middle age. Offspring born from dams colonized with aged microbiome also had significant changes in levels of neurotransmitters and metabolites in the blood and the brain. Adult offspring from dams colonized with an aged microbiome displayed persistent depressive- and anxiety-like phenotypes. Collectively, these results demonstrate that age-related changes in the composition of the maternal gut microbiome contribute to chronic alterations in the behavior and physiology of offspring. This work highlights the potential of microbiome-targeted approaches, even prior to birth, may reduce the risk of neuropsychiatric disorders.}, }
@article {pmid39443495, year = {2024}, author = {Wright, JR and Chen See, JR and Ly, TT and Tokarev, V and Pellegrino, J and Peachey, L and Anderson, SLC and Walls, CY and Hosler, M and Shope, AJ and Gulati, S and Toler, KO and Lamendella, R}, title = {Application of a metatranscriptomics technology, CSI-Dx, for the detection of pathogens associated with prosthetic joint infections.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {25100}, pmid = {39443495}, issn = {2045-2322}, mesh = {Humans ; *Prosthesis-Related Infections/diagnosis/microbiology ; *Synovial Fluid/microbiology ; Female ; Male ; Aged ; Middle Aged ; Bacteria/genetics/isolation &amp; purification ; Gene Expression Profiling/methods ; Metagenomics/methods ; Transcriptome ; Sensitivity and Specificity ; Microbiota/genetics ; }, abstract = {Preoperative identification of causal organism(s) is crucial for effective prosthetic joint infection treatment. Herein, we explore the clinical application of a novel metatranscriptomic (MT) workflow, CSI-Dx, to detect pathogens associated with prosthetic joint infection. MT provides insight into transcriptionally active microbes, overcoming limitations of culture-based and available molecular methods. This study included 340 human synovial fluid specimens subjected to CSI-Dx and traditional culture-based methods. Exploratory analyses were conducted to determine sensitivity and specificity of CSI-Dx for detecting clinically-relevant taxa. Our findings provide insights into the active microbial community composition of synovial fluid from arthroplasty patients and demonstrate the potential clinical utility of CSI-Dx for aiding prosthetic joint infection diagnosis. This approach offers potential for improved sensitivity and acceptable specificity compared to synovial fluid culture, enabling detection of culturable and non-culturable microorganisms. Furthermore, CSI-Dx provides valuable information on antimicrobial resistance gene expression. While further optimization is needed, integrating metatranscriptomic technologies like CSI-Dx into routine clinical practice can revolutionize prosthetic joint infection diagnosis by offering a comprehensive and active snapshot of associated pathogens.}, }
@article {pmid39443316, year = {2024}, author = {Zheng, HY and Wu, HX and Du, ZQ}, title = {Gut metagenome-derived image augmentation and deep learning improve prediction accuracy of metabolic disease classification.}, journal = {Yi chuan = Hereditas}, volume = {46}, number = {10}, pages = {886-896}, doi = {10.16288/j.yczz.24-086}, pmid = {39443316}, issn = {0253-9772}, mesh = {Humans ; *Deep Learning ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; *Support Vector Machine ; *Metabolic Diseases/genetics/microbiology ; Neural Networks, Computer ; Bayes Theorem ; }, abstract = {In recent years, statistics and machine learning methods have been widely used to analyze the relationship between human gut microbial metagenome and metabolic diseases, which is of great significance for the functional annotation and development of microbial communities. In this study, we proposed a new and scalable framework for image enhancement and deep learning of gut metagenome, which could be used in the classification of human metabolic diseases. Each data sample in three representative human gut metagenome datasets was transformed into image and enhanced, and put into the machine learning models of logistic regression (LR), support vector machine (SVM), Bayesian network (BN) and random forest (RF), and the deep learning models of multilayer perceptron (MLP) and convolutional neural network (CNN). The accuracy performance of the overall evaluation model for disease prediction was verified by accuracy (A), accuracy (P), recall (R), F1 score (F1), area under ROC curve (AUC) and 10 fold cross-validation. The results showed that the overall performance of MLP model was better than that of CNN, LR, SVM, BN, RF and PopPhy-CNN, and the performance of MLP and CNN models was further improved after data enhancement (random rotation and adding salt-and-pepper noise). The accuracy of MLP model in disease prediction was further improved by 4%-11%, F1 by 1%-6% and AUC by 5%-10%. The above results showed that human gut metagenome image enhancement and deep learning could accurately extract microbial characteristics and effectively predict the host disease phenotype. The source code and datasets used in this study can be publicly accessed in https://github.com/HuaXWu/GM_ML_Classification.git.}, }
@article {pmid39441997, year = {2024}, author = {Bolaños, LM and Michelsen, M and Temperton, B}, title = {Metagenomic time series reveals a Western English Channel viral community dominated by members with strong seasonal signals.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39441997}, issn = {1751-7370}, support = {NE/R010935/1//UK Natural Environment Research Council/ ; NE/R015953/1//National Capability Long-term Single Centre Science Programme, Climate Linked Atlantic Sector Science/ ; }, mesh = {*Seasons ; *Metagenomics ; *Seawater/virology/microbiology ; *Metagenome ; Viruses/genetics/classification/isolation &amp; purification ; Virome/genetics ; }, abstract = {Marine viruses are key players of ocean biogeochemistry, profoundly influencing microbial community ecology and evolution. Despite their importance, few studies have explored continuous inter-seasonal viral metagenomic time series in marine environments. Viral dynamics are complex, influenced by multiple factors such as host population dynamics and environmental conditions. To disentangle the complexity of viral communities, we developed an unsupervised machine learning framework to classify viral contigs into "chronotypes" based on temporal abundance patterns. Analysing an inter-seasonal monthly time series of surface viral metagenomes from the Western English Channel, we identified chronotypes and compared their functional and evolutionary profiles. Results revealed a consistent annual cycle with steep compositional changes from winter to summer and steadier transitions from summer to winter. Seasonal chronotypes were enriched in potential auxiliary metabolic genes of the ferrochelatases and 2OG-Fe(II) oxygenase orthologous groups compared to non-seasonal types. Chronotypes clustered into four groups based on their correlation profiles with environmental parameters, primarily driven by temperature and nutrients. Viral contigs exhibited a rapid turnover of polymorphisms, akin to Red Queen dynamics. However, within seasonal chronotypes, some sequences exhibited annual polymorphism recurrence, suggesting that a fraction of the seasonal viral populations evolve more slowly. Classification into chronotypes revealed viral genomic signatures linked to temporal patterns, likely reflecting metabolic adaptations to environmental fluctuations and host dynamics. This novel framework enables the identification of long-term trends in viral composition, environmental influences on genomic structure, and potential viral interactions.}, }
@article {pmid39441989, year = {2024}, author = {Bustos-Caparros, E and Viver, T and Gago, JF and Rodriguez-R, LM and Hatt, JK and Venter, SN and Fuchs, BM and Amann, R and Bosch, R and Konstantinidis, KT and Rossello-Mora, R}, title = {Ecological success of extreme halophiles subjected to recurrent osmotic disturbances is primarily driven by congeneric species replacement.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39441989}, issn = {1751-7370}, support = {PGC2018-096956-B-C41//Spanish Ministry of Science, Innovation and Universities/ ; //European Regional Development Funds/ ; PRE2019-088016//Spanish Government Ministry for Science and Innovation/ ; FEMS-GO-2020-254//Federation of European Microbiological Societies/ ; //DiSC of University of Innsbruck/ ; }, mesh = {*Osmotic Pressure ; Halobacteriaceae/genetics ; Biodiversity ; Salinity ; }, abstract = {To understand how extreme halophiles respond to recurrent disturbances, we challenged the communities thriving in salt-saturated (~36% salts) ~230 L brine mesocosms to repeated dilutions down to 13% (D13 mesocosm) or 20% (D20 mesocosm) salts each time mesocosms reached salt saturation due to evaporation (for 10 and 17 cycles, respectively) over 813 days. Depending on the magnitude of dilution, the most prevalent species, Haloquadratum walsbyi and Salinibacter ruber, either increased in dominance by replacing less competitive populations (for D20, moderate stress conditions), or severely decreased in abundance and were eventually replaced by other congeneric species better adapted to the higher osmotic stress (for D13, strong stress conditions). Congeneric species replacement was commonly observed within additional abundant genera in response to changes in environmental or biological conditions (e.g. phage predation) within the same system and under a controlled perturbation of a relevant environmental parameter. Therefore, a genus is an ecologically important level of diversity organization, not just a taxonomic rank, that persists in the environment based on congeneric species replacement due to relatively high functional overlap (gene sharing), with important consequences for the success of the lineage, and similar to the success of a species via strain-replacement. Further, our results showed that successful species were typically accompanied by the emergence of their own viral cohorts, whose intra-cohort diversity appeared to strongly covary with, and likely drive, the intra-host diversity. Collectively, our results show that brine communities are ecologically resilient and continuously adapting to changing environments by transitioning to alternative stable states.}, }
@article {pmid39440963, year = {2024}, author = {Wang, Y and Sun, Y and Huang, K and Gao, Y and Lin, Y and Yuan, B and Wang, X and Xu, G and Nussio, LG and Yang, F and Ni, K}, title = {Multi-omics analysis reveals the core microbiome and biomarker for nutrition degradation in alfalfa silage fermentation.}, journal = {mSystems}, volume = {9}, number = {11}, pages = {e0068224}, pmid = {39440963}, issn = {2379-5077}, support = {32171686//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {*Medicago sativa/microbiology/metabolism ; *Silage/microbiology ; *Fermentation ; *Microbiota/genetics ; Animals ; Biomarkers/metabolism ; Bacteria/genetics/metabolism/classification/isolation &amp; purification ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing ; Cattle ; Multiomics ; }, abstract = {UNLABELLED: Alfalfa (Medicago sativa L.) is one of the most extensively cultivated forage crops globally, and its nutritional quality critically influences the productivity of dairy cows. Silage fermentation is recognized as a crucial technique for the preservation of fresh forage, ensuring the retention of its vital nutrients. However, the detailed microbial components and their functions in silage fermentation are not fully understood. This study integrated large-scale microbial culturing with high-throughput sequencing to thoroughly examine the microbial community structure in alfalfa silage and explored the potential pathways of nutritional degradation via metagenomic analysis. The findings revealed an enriched microbial diversity in silage, indicated by the identification of amplicon sequence variants. Significantly, the large-scale culturing approach recovered a considerable number of unique microbes undetectable by high-throughput sequencing. Predominant genera, such as Lactiplantibacillus, Leuconostoc, Lentilactobacillus, Weissella, and Liquorilactobacillus, were identified based on their abundance and prevalence. Additionally, genes associated with Enterobacteriaceae were discovered, which might be involved in pathways leading to the production of ammonia-N and butyric acid. Overall, this study offers a comprehensive insight into the microbial ecology of silage fermentation and provides valuable information for leveraging microbial consortia to enhance fermentation quality.<br><br>IMPORTANCE: Silage fermentation is a microbial-driven anaerobic process that efficiently converts various substrates into nutrients readily absorbable and metabolizable by ruminant animals. This study, integrating culturomics and metagenomics, has successfully identified core microorganisms involved in silage fermentation, including those at low abundance. This discovery is crucial for the targeted cultivation of specific microorganisms to optimize fermentation processes. Furthermore, our research has uncovered signature microorganisms that play pivotal roles in nutrient metabolism, significantly advancing our understanding of the intricate relationships between microbial communities and nutrient degradation during silage fermentation.}, }
@article {pmid39438987, year = {2024}, author = {Rosenstein, R and Torres Salazar, BO and Sauer, C and Heilbronner, S and Krismer, B and Peschel, A}, title = {The Staphylococcus aureus-antagonizing human nasal commensal Staphylococcus lugdunensis depends on siderophore piracy.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {213}, pmid = {39438987}, issn = {2049-2618}, support = {GRK1708//Deutsche Forschungsgemeinschaft/ ; Cluster of Excellence EXC2124//Deutsche Forschungsgemeinschaft/ ; GRK1708//Deutsche Forschungsgemeinschaft/ ; }, mesh = {Humans ; *Staphylococcus lugdunensis/metabolism/isolation &amp; purification ; *Staphylococcus aureus/genetics ; *Nose/microbiology ; *Siderophores/metabolism ; *Staphylococcal Infections/microbiology ; Microbiota ; Adult ; Male ; Female ; Healthy Volunteers ; Symbiosis ; Carrier State/microbiology ; Middle Aged ; }, abstract = {BACKGROUND: Bacterial pathogens such as Staphylococcus aureus colonize body surfaces of part of the human population, which represents a critical risk factor for skin disorders and invasive infections. However, such pathogens do not belong to the human core microbiomes. Beneficial commensal bacteria can often prevent the invasion and persistence of such pathogens by using molecular strategies that are only superficially understood. We recently reported that the commensal bacterium Staphylococcus lugdunensis produces the novel antibiotic lugdunin, which eradicates S. aureus from the nasal microbiomes of hospitalized patients. However, it has remained unclear if S. lugdunensis may affect S. aureus carriage in the general population and which external factors might promote S. lugdunensis carriage to enhance its S. aureus-eliminating capacity.<br><br>RESULTS: We could cultivate S. lugdunensis from the noses of 6.3% of healthy human volunteers. In addition, S. lugdunensis DNA could be identified in metagenomes of many culture-negative nasal samples indicating that cultivation success depends on a specific bacterial threshold density. Healthy S. lugdunensis carriers had a 5.2-fold lower propensity to be colonized by S. aureus indicating that lugdunin can eliminate S. aureus also in healthy humans. S. lugdunensis-positive microbiomes were dominated by either Staphylococcus epidermidis, Corynebacterium species, or Dolosigranulum pigrum. These and further bacterial commensals, whose abundance was positively associated with S. lugdunensis, promoted S. lugdunensis growth in co-culture. Such mutualistic interactions depended on the production of iron-scavenging siderophores by supportive commensals and on the capacity of S. lugdunensis to import siderophores. Video Abstract CONCLUSIONS: These findings underscore the importance of microbiome homeostasis for eliminating pathogen colonization. Elucidating mechanisms that drive microbiome interactions will become crucial for microbiome-precision editing approaches.}, }
@article {pmid39438902, year = {2024}, author = {Díaz-García, C and Moreno, E and Talavera-Rodríguez, A and Martín-Fernández, L and González-Bodí, S and Martín-Pedraza, L and Pérez-Molina, JA and Dronda, F and Gosalbes, MJ and Luna, L and Vivancos, MJ and Huerta-Cepas, J and Moreno, S and Serrano-Villar, S}, title = {Fecal microbiota transplantation alters the proteomic landscape of inflammation in HIV: identifying bacterial drivers.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {214}, pmid = {39438902}, issn = {2049-2618}, mesh = {Humans ; *Fecal Microbiota Transplantation ; *HIV Infections/therapy ; *Gastrointestinal Microbiome ; *Inflammation ; Male ; Middle Aged ; Female ; *Proteomics/methods ; Adult ; *Feces/microbiology ; Pilot Projects ; Double-Blind Method ; Bacteria/classification/isolation &amp; purification/metabolism ; }, abstract = {BACKGROUND: Despite effective antiretroviral therapy, people with HIV (PWH) experience persistent systemic inflammation and increased morbidity and mortality. Modulating the gut microbiome through fecal microbiota transplantation (FMT) represents a novel therapeutic strategy. We aimed to evaluate proteomic changes in inflammatory pathways following repeated, low-dose FMT versus placebo.<br><br>METHODS: This double-masked, placebo-controlled pilot study assessed the proteomic impacts of weekly FMT versus placebo treatment over 8&#xa0;weeks on systemic inflammation in 29 PWH receiving stable antiretroviral therapy (ART). Three stool donors with high Faecalibacterium and butyrate profiles were selected, and their individual stools were used for FMT capsule preparation. Proteomic changes in 345 inflammatory proteins in plasma were quantified using the proximity extension assay, with samples collected at baseline and at weeks 1, 8, and 24. Concurrently, we characterized shifts in the gut microbiota composition and annotated functions through shotgun metagenomics. We fitted generalized additive models to evaluate the dynamics of protein expression. We selected the most relevant proteins to explore their correlations with microbiome composition and functionality over time using linear mixed models.<br><br>RESULTS: FMT significantly reduced the plasma levels of 45 inflammatory proteins, including established mortality predictors such as IL6 and TNF-&#x3b1;. We found notable reductions persisting up to 16&#xa0;weeks after the final FMT procedure, including in the expression of proteins such as CCL20 and CD22. We identified changes in 46 proteins, including decreases in FT3LG, IL6, IL10RB, IL12B, and IL17A, which correlated with multiple bacterial species. We found that specific bacterial species within the Ruminococcaceae, Succinivibrionaceae, Prevotellaceae families, and the Clostridium genus, in addition to their associated genes and functions, were significantly correlated with changes in inflammatory markers.<br><br>CONCLUSIONS: Targeting the gut microbiome through FMT effectively decreased inflammatory proteins in PWH, with sustained effects. These findings suggest the potential of the microbiome as a therapeutic target to mitigate inflammation-related complications in this population, encouraging further research and development of microbiome-based interventions. Video Abstract.}, }
@article {pmid39438539, year = {2024}, author = {Guo, J and Li, Z and Liu, X and Jin, Y and Sun, Y and Yuan, Z and Zhang, W and Wang, J and Zhang, M}, title = {Response of the gut microbiota to changes in the nutritional status of red deer during winter.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {24961}, pmid = {39438539}, issn = {2045-2322}, support = {2572023AW20//National Key Fundamental Research Funds for the Central Universities, China/ ; 2572020BE02//National Key Fundamental Research Funds for the Central Universities, China/ ; QLKH [2023] 11//the Guizhou Forestry Administration Scientific Research Project/ ; 2023GZJB005//the Reward and Subsidy Fund Project of Guizhou Education University, Ministry of Science and Technology of the People's Republic of China and National Natural Science Foundation of China/ ; 32071512//the National Natural Science Foundation of China, NSFC/ ; 2023YFF1305000//National Key Research and Development Program of China: Migration and diffusion mechanism of wild animals and population control technology/ ; ZKKF2022179//the Opening Research Projects for the Think Tanks of Heilongjiang Provincial Universities/ ; }, mesh = {Animals ; *Deer/microbiology ; *Gastrointestinal Microbiome ; *Seasons ; *Nutritional Status ; Feces/microbiology ; Nitrogen/metabolism/analysis ; Creatinine ; }, abstract = {Unravelling abrupt alterations in the gut microbiota of wild species associated with nutritional stress is imperative but challenging for wildlife conservation. This study assessed the nutritional status of wild red deer during winter on the basis of changes in faecal nitrogen (FN) and urea nitrogen/creatinine (UN: C) levels and identified gut microbes associated with nutritional status via nutritional control experiments and metagenomic sequencing. The FN of wild red deer in winter 2022 was significantly lower than that in winter 2021 (p < 0.05, winter 2021: 1.37 ± 0.16% and winter 2022: 1.26 ± 0.22%), and the UN: C ratio increased (winter 2021: 2.19 ± 1.65 and winter 2022: 3.05 ± 3.50). Similar trends were found in late winter, which indicated greater nutritional pressure in winter (2022) and late winter. Compared with winter 2021, abundances of Ructibacterium and Butyrivibrio significantly increased, and Acetatifactor and Cuneatibacter significantly decreased during winter 2022 (p < 0.05). Compared with early winter, the cell growth and death pathways increased and lipid metabolism and its subpathway of secondary bile acid synthesis (ko00121) significantly decreased during late winter (p < 0.05), which was similar to the changes in malnourished experimental red deer. Abrupt alterations in the gut microbiota should receive increased attention when monitoring the nutritional health of wild ungulates. This study provides new insights and critical implications for the conservation of wild ungulate populations.}, }
@article {pmid39438328, year = {2024}, author = {Varghese, P and Kumar, K and Sarkar, P and Karmakar, S and Shukla, SP and Kumar, S and Bharti, VS and Paul, T and Kantal, D}, title = {Impact of Triclosan on Bacterial Biodiversity and Sediment Enzymes - A Microcosm Study.}, journal = {Bulletin of environmental contamination and toxicology}, volume = {113}, number = {5}, pages = {59}, pmid = {39438328}, issn = {1432-0800}, support = {DST/TMD-EWO-WTI/2K19/EWFH/2019/214//Department of Science and Technology, Govt. of India/ ; }, mesh = {*Triclosan/toxicity ; *Geologic Sediments/microbiology/chemistry ; *Biodiversity ; *Water Pollutants, Chemical/analysis/toxicity ; *Bacteria/drug effects ; }, abstract = {Triclosan (TCS), a widely used antimicrobial biocide, has raised serious concern among the scientific community in recent years owing to its ubiquitous presence around the globe and toxicity to aquatic organisms. The current study investigated the alterations in bacterial diversity, nutrients, and sediment enzyme activity in TCS-exposed sediment. TCS concentrations of 3 mg/L (T1) and 6 mg/L (T2) were applied in a microcosm setup for 28 days to sediment collected from Versova Creek, Mumbai. Among sediment enzymes, dehydrogenase activity exhibited the greatest degree of variability in 3 mg/L exposed sediment. Nitrite, total nitrogen and urease exhibited higher concentrations in 6 mg/L TCS exposed sediment. The concentration of ammonia was observed to be decreasing in treatments exposed to 6 mg/L TCS. Total heterotrophic bacteria exhibited an increase in count in T1 and a decrease in T2. Metagenomics data showed a higher relative abundance of bacteria in T1 compared to T2 on the 28th day of sampling. Proteobacteria was found to be the most abundant phylum in all samples, and their relative abundance was reduced by 0.14% in T1 and 5.48% in T2. The results confirm the alterations in the composition of sediment bacterial communities and their enzymatic activities due to TCS exposure.}, }
@article {pmid39436938, year = {2024}, author = {Rocha, U and Kasmanas, JC and Toscan, R and Sanches, DS and Magnusdottir, S and Saraiva, JP}, title = {Simulation of 69 microbial communities indicates sequencing depth and false positives are major drivers of bias in prokaryotic metagenome-assembled genome recovery.}, journal = {PLoS computational biology}, volume = {20}, number = {10}, pages = {e1012530}, pmid = {39436938}, issn = {1553-7358}, mesh = {*Metagenome/genetics ; *Microbiota/genetics ; *Computer Simulation ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing/methods ; Sequence Analysis, DNA/methods ; Computational Biology/methods ; Bacteria/genetics/classification ; Genome, Bacterial/genetics ; }, abstract = {We hypothesize that sample species abundance, sequencing depth, and taxonomic relatedness influence the recovery of metagenome-assembled genomes (MAGs). To test this hypothesis, we assessed MAG recovery in three in silico microbial communities composed of 42 species with the same richness but different sample species abundance, sequencing depth, and taxonomic distribution profiles using three different pipelines for MAG recovery. The pipeline developed by Parks and colleagues (8K) generated the highest number of MAGs and the lowest number of true positives per community profile. The pipeline by Karst and colleagues (DT) showed the most accurate results (~ 92%), outperforming the 8K and Multi-Metagenome pipeline (MM) developed by Albertsen and collaborators. Sequencing depth influenced the accurate recovery of genomes when using the 8K and MM, even with contrasting patterns: the MM pipeline recovered more MAGs found in the original communities when employing sequencing depths up to 60 million reads, while the 8K recovered more true positives in communities sequenced above 60 million reads. DT showed the best species recovery from the same genus, even though close-related species have a low recovery rate in all pipelines. Our results highlight that more bins do not translate to the actual community composition and that sequencing depth plays a role in MAG recovery and increased community resolution. Even low MAG recovery error rates can significantly impact biological inferences. Our data indicates that the scientific community should curate their findings from MAG recovery, especially when asserting novel species or metabolic traits.}, }
@article {pmid39436609, year = {2025}, author = {Singer, F and Kuhring, M and Renard, BY and Muth, T}, title = {Moving Toward Metaproteogenomics: A Computational Perspective on Analyzing Microbial Samples via Proteogenomics.}, journal = {Methods in molecular biology (Clifton, N.J.)}, volume = {2859}, number = {}, pages = {297-318}, pmid = {39436609}, issn = {1940-6029}, mesh = {*Proteogenomics/methods ; *Microbiota/genetics ; Computational Biology/methods ; Proteomics/methods ; Software ; Databases, Protein ; Metagenomics/methods ; Algorithms ; Metagenome ; Humans ; High-Throughput Nucleotide Sequencing/methods ; Mass Spectrometry/methods ; Proteome/genetics ; }, abstract = {Microbial sample analysis has received growing attention within the last decade, driven by important findings in microbiome research and promising applications in the biotechnological field. Modern mass spectrometry-based methodology has been established in this context, providing sufficient sensitivity, resolution, dynamic range, and throughput to analyze the so-called metaproteome of complex microbial mixtures from clinical or environmental samples. While proteomic analyses were previously restricted to common model organisms, next-generation sequencing technologies nowadays allow for the rapid and cost-efficient characterization of whole metagenomes of microbial consortia and specific genomes from non-model organisms to which microbes contribute by significant amounts. This proteogenomic approach, meaning the combined application of genomic and proteomic methods, enables researchers to create a protein database that presents a tailored blueprint of the microbial sample under investigation. This contribution provides an overview of the computational challenges and opportunities in proteogenomics and metaproteomics as of January 2018. For practical application, we first showcase an integrative proteogenomic method that circumvents existing reference databases by creating sample-specific transcripts. The underlying algorithm uses a graph network approach that combines RNA-Seq and peptide information. As a second example, we provide a tutorial for a simulation tool that estimates the computational limits of detecting microbial non-model organisms. This method evaluates the potential influence of error-tolerant searches and proteogenomic approaches on databases of interest. Finally, we discuss recommendations for developing future strategies that may help overcome present limitations by combining the strengths of genome- and proteome-based methods and moving toward an integrated metaproteogenomics approach.}, }
@article {pmid39436239, year = {2024}, author = {Cheng, M and Zhou, H and Zhang, H and Zhang, X and Zhang, S and Bai, H and Zha, Y and Luo, D and Chen, D and Chen, S and Ning, K and Liu, W}, title = {Hidden Links Between Skin Microbiome and Skin Imaging Phenome.}, journal = {Genomics, proteomics &amp; bioinformatics}, volume = {22}, number = {4}, pages = {}, pmid = {39436239}, issn = {2210-3244}, support = {32071465//National Natural Science Foundation of China/ ; 2018YFC0910502//National Key R&amp;D Program of China/ ; }, mesh = {Humans ; *Skin/microbiology/metabolism/diagnostic imaging ; *Microbiota/genetics ; Male ; Female ; *Phenotype ; *Skin Aging ; Adult ; Middle Aged ; Metagenome ; }, abstract = {Despite the skin microbiome has been linked to skin health and diseases, its role in modulating human skin appearance remains understudied. Using a total of 1244 face imaging phenomes and 246 cheek metagenomes, we first established three skin age indices by machine learning, including skin phenotype age (SPA), skin microbiota age (SMA), and skin integration age (SIA) as surrogates of phenotypic aging, microbial aging, and their combination, respectively. Moreover, we found that besides aging and gender as intrinsic factors, skin microbiome might also play a role in shaping skin imaging phenotypes (SIPs). Skin taxonomic and functional α diversity was positively linked to melanin, pore, pigment, and ultraviolet spot levels, but negatively linked to sebum, lightening, and porphyrin levels. Furthermore, certain species were correlated with specific SIPs, such as sebum and lightening levels negatively correlated with Corynebacterium matruchotii, Staphylococcus capitis, and Streptococcus sanguinis. Notably, we demonstrated skin microbial potential in predicting SIPs, among which the lightening level presented the least error of 1.8%. Lastly, we provided a reservoir of potential mechanisms through which skin microbiome adjusted the SIPs, including the modulation of pore, wrinkle, and sebum levels by cobalamin and heme synthesis pathways, predominantly driven by Cutibacterium acnes. This pioneering study unveils the paradigm for the hidden links between skin microbiome and skin imaging phenome, providing novel insights into how skin microbiome shapes skin appearance and its healthy aging.}, }
@article {pmid39435818, year = {2024}, author = {He, L and Yan, YT and Yuan, CY and Lin, QS and Yu, DT}, title = {Characteristics of soil viral communities in Cunninghamia lanceolata plantations with different stand ages.}, journal = {Ying yong sheng tai xue bao = The journal of applied ecology}, volume = {35}, number = {9}, pages = {2543-2551}, doi = {10.13287/j.1001-9332.202409.007}, pmid = {39435818}, issn = {1001-9332}, mesh = {*Soil Microbiology ; *Cunninghamia/growth &amp; development/virology ; Soil/chemistry ; Viruses/classification/isolation &amp; purification/genetics ; China ; Virome ; Phosphorus/analysis ; }, abstract = {We investigated the dynamics of soil viral community in Cunninghamia lanceolata plantations with different stand ages (8, 21, 27, and 40 years old) in a subtropical region. The viral metagenomics and bioinformatics analysis were used to analyze the compositional and functional differences of soil viral communities across different stand ages, and to explore the environmental driving factors. The results showed that tailed phages dominated soil viral community in subtropical C. lanceolata plantations, with the highest proportion of Siphoviridae (19.6%-39.5%). There was significant difference in soil viral community structure among different stand ages, with the main driving factors being electrical conductance and available phosphorus. The metabolic functional genes encoded by viruses exhibited higher relative abundance. The α-diversity of soil viral function in mature C. lanceolata plantations was higher than other stands. There were significant differences in soil viral functional structure among different stand ages, which were mainly driven by ammonium nitrogen. During the development of C. lanceolata plantations, auxiliary metabolic genes encoded by virus related to nitrogen and phosphorus may regulate the metabolism of host microorganisms, thereby potentially impacting biogeochemical cycling of these elements.}, }
@article {pmid39434799, year = {2024}, author = {Ghabban, H and Albalawi, DA and Al-Otaibi, AS and Alshehri, D and Alenzi, AM and Alatawy, M and Alatawi, HA and Alnagar, DK and Bahieldin, A}, title = {Investigating the bacterial community of gray mangroves (Avicennia marina) in coastal areas of Tabuk region.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18282}, pmid = {39434799}, issn = {2167-8359}, mesh = {*Soil Microbiology ; *Avicennia/microbiology ; Saudi Arabia ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota/genetics ; *RNA, Ribosomal, 16S/genetics ; Rhizosphere ; Wetlands ; }, abstract = {Mangrove vegetation, a threatened and unique inter-tidal ecosystem, harbours a complex and largely unexplored bacterial community crucial for nutrient cycling and the degradation of toxic pollutants in coastal areas. Despite its importance, the bacterial community composition of the gray mangrove (Avicennia marina) in the Red Sea coastal regions remains under-studied. This study aims to elucidate the structural and functional diversity of the microbiome in the bulk and rhizospheric soils associated with A. marina in the coastal areas of Ras Alshabaan-Umluj (Umluj) and Almunibrah-Al-Wajh (Al-Wajh) within the Tabuk region of Saudi Arabia. Amplicon sequencing targeting the 16S rRNA was performed using the metagenomic DNAs from the bulk and rhizospheric soil samples from Umluj and Al-Wajh. A total of 6,876 OTUs were recovered from all samples, of which 1,857 OTUs were common to all locations while the total number of OTUs unique to Al-wajh was higher (3,011 OTUs) than the total number of OTUs observed (1,324 OTUs) at Umluj site. Based on diversity indices, overall bacterial diversity was comparatively higher in rhizospheric soil samples of both sites. Comparing the diversity indices for the rhizosphere samples from the two sites revealed that the diversity was much higher in the rhizosphere samples from Al-Wajh as compared to those from Umluj. The most dominant genera in rhizosphere sample of Al-Wajh were Geminicoccus and Thermodesulfovibrio while the same habitat of the Umluj site was dominated by Propionibacterium, Corynebacterium and Staphylococcus. Bacterial functional potential prediction analyses showed that bacteria from two locations have almost similar patterns of functional genes including amino acids and carbohydrates metabolisms, sulfate reduction and C-1 compound metabolism and xenobiotics biodegradation. However, the rhizosphere samples of both sites harbour more genes involved in the utilization and assimilation of C-1 compounds. Our results reveal that bacterial communities inhabiting the rhizosphere of A. marina differed significantly from those in the bulk soil, suggesting a possible role of A. marina roots in shaping these bacterial communities. Additionally, not only vegetation but also geographical location appears to influence the overall bacterial composition at the two sites.}, }
@article {pmid39434565, year = {2025}, author = {Blattner, LA and Lapellegerie, P and Courtney-Mustaphi, C and Heiri, O}, title = {Sediment Core DNA-Metabarcoding and Chitinous Remain Identification: Integrating Complementary Methods to Characterise Chironomidae Biodiversity in Lake Sediment Archives.}, journal = {Molecular ecology resources}, volume = {25}, number = {1}, pages = {e14035}, pmid = {39434565}, issn = {1755-0998}, mesh = {Animals ; *Chironomidae/genetics/classification ; *Lakes ; *DNA Barcoding, Taxonomic/methods ; *Geologic Sediments/chemistry ; *Biodiversity ; Switzerland ; Larva/genetics/classification ; DNA/genetics/chemistry ; Chitin ; Metagenomics/methods ; }, abstract = {Chironomidae, so-called non-biting midges, are considered key bioindicators of aquatic ecosystem variability. Data derived from morphologically identifying their chitinous remains in sediments document chironomid larvae assemblages, which are studied to reconstruct ecosystem changes over time. Recent developments in sedimentary DNA (sedDNA) research have demonstrated that molecular techniques are suitable for determining past and present occurrences of organisms. Nevertheless, sedDNA records documenting alterations in chironomid assemblages remain largely unexplored. To close this gap, we examined the applicability of sedDNA metabarcoding to identify Chironomidae assemblages in lake sediments by sampling and processing three 21-35 cm long sediment cores from Lake Sempach in Switzerland. With a focus on developing analytical approaches, we compared an invertebrate-universal (FWH) and a newly designed Chironomidae-specific metabarcoding primer set (CH) to assess their performance in detecting Chironomidae DNA. We isolated and identified chitinous larval remains and compared the morphotype assemblages with the data derived from sedDNA metabarcoding. Results showed a good overall agreement of the morphotype assemblage-specific clustering among the chitinous remains and the metabarcoding datasets. Both methods indicated higher chironomid assemblage similarity between the two littoral cores in contrast to the deep lake core. Moreover, we observed a pronounced primer bias effect resulting in more Chironomidae detections with the CH primer combination compared to the FWH combination. Overall, we conclude that sedDNA metabarcoding can supplement traditional remain identifications and potentially provide independent reconstructions of past chironomid assemblage changes. Furthermore, it has the potential of more efficient workflows, better sample standardisation and species-level resolution datasets.}, }
@article {pmid39434181, year = {2024}, author = {Chen, CZ and Li, P and Liu, L and Sun, YJ and Ju, WM and Li, ZH}, title = {Seasonal variations of microbial communities and viral diversity in fishery-enhanced marine ranching sediments: insights into metabolic potentials and ecological interactions.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {209}, pmid = {39434181}, issn = {2049-2618}, support = {42277269//National Natural Science Foundation of China/ ; 42277269//National Natural Science Foundation of China/ ; 42277269//National Natural Science Foundation of China/ ; 42277269//National Natural Science Foundation of China/ ; KLMR-2022-03//Key Laboratory of Marine Ranching, Ministry of Agriculture and Rural Affairs, China/ ; KLMR-2022-03//Key Laboratory of Marine Ranching, Ministry of Agriculture and Rural Affairs, China/ ; KLMR-2022-03//Key Laboratory of Marine Ranching, Ministry of Agriculture and Rural Affairs, China/ ; KLMR-2022-03//Key Laboratory of Marine Ranching, Ministry of Agriculture and Rural Affairs, China/ ; }, mesh = {*Geologic Sediments/microbiology/virology ; *Seasons ; *Microbiota ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Viruses/classification/genetics/isolation &amp; purification ; *Fisheries ; *Biodiversity ; Ecosystem ; Metagenome ; Sulfur/metabolism ; Metagenomics ; Carbon/metabolism ; Nitrogen/metabolism ; }, abstract = {BACKGROUND: The ecosystems of marine ranching have enhanced marine biodiversity and ecological balance and have promoted the natural recovery and enhancement of fishery resources. The microbial communities of these ecosystems, including bacteria, fungi, protists, and viruses, are the drivers of biogeochemical cycles. Although seasonal changes in microbial communities are critical for ecosystem functioning, the current understanding of microbial-driven metabolic properties and their viral communities in marine sediments remains limited. Here, we employed amplicon (16S and 18S) and metagenomic approaches aiming to reveal the seasonal patterns of microbial communities, bacterial-eukaryotic interactions, whole metabolic potential, and their coupling mechanisms with carbon (C), nitrogen (N), and sulfur (S) cycling in marine ranching sediments. Additionally, the characterization and diversity of viral communities in different seasons were explored in marine ranching sediments.<br><br>RESULTS: The current study demonstrated that seasonal variations dramatically affected the diversity of microbial communities in marine ranching sediments and the bacterial-eukaryotic interkingdom co-occurrence networks. Metabolic reconstruction of the 113 medium to high-quality metagenome-assembled genomes (MAGs) was conducted, and a total of 8 MAGs involved in key metabolic genes and pathways (methane oxidation&#xa0;-&#xa0;denitrification&#xa0;-&#xa0;S oxidation), suggesting a possible coupling effect between the C, N, and S cycles. In total, 338 viral operational taxonomic units (vOTUs) were identified, all possessing specific ecological characteristics in different seasons and primarily belonging to Caudoviricetes, revealing their widespread distribution and variety in marine sediment ecosystems. In addition, predicted virus-host linkages showed that high host specificity was observed, with few viruses associated with specific hosts.<br><br>CONCLUSIONS: This finding deepens our knowledge of element cycling and viral diversity in fisheries enrichment ecosystems, providing insights into microbial-virus interactions in marine sediments and their effects on biogeochemical cycling. These findings have potential applications in marine ranching management and ecological conservation. Video Abstract.}, }
@article {pmid39434178, year = {2024}, author = {van Gogh, M and Louwers, JM and Celli, A and Gräve, S and Viveen, MC and Bosch, S and de Boer, NKH and Verheijden, RJ and Suijkerbuijk, KPM and Brand, EC and Top, J and Oldenburg, B and de Zoete, MR}, title = {Next-generation IgA-SEQ allows for high-throughput, anaerobic, and metagenomic assessment of IgA-coated bacteria.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {211}, pmid = {39434178}, issn = {2049-2618}, mesh = {Humans ; *Feces/microbiology ; *Gastrointestinal Microbiome ; *Metagenomics/methods ; *Immunoglobulin A/immunology ; *Bacteria/genetics/classification/immunology ; High-Throughput Nucleotide Sequencing/methods ; Inflammatory Bowel Diseases/microbiology/immunology ; }, abstract = {BACKGROUND: The intestinal microbiota plays a significant role in maintaining systemic and intestinal homeostasis, but can also influence diseases such as inflammatory bowel disease (IBD) and cancer. Certain bacterial species within the intestinal tract can chronically activate the immune system, leading to low-grade intestinal inflammation. As a result, plasma cells produce high levels of secretory antigen-specific immunoglobulin A (IgA), which coats the immunostimulatory bacteria. This IgA immune response against intestinal bacteria may be associated with the maintenance of homeostasis and health, as well as disease. Unraveling this dichotomy and identifying the immunostimulatory bacteria is crucial for understanding the relationship between the intestinal microbiota and the immune system, and their role in health and disease. IgA-SEQ technology has successfully identified immunostimulatory, IgA-coated bacteria from fecal material. However, the original technology is time-consuming and has limited downstream applications. In this study, we aimed to develop a next-generation, high-throughput, magnet-based sorting approach (ng-IgA-SEQ) to overcome the limitations of the original IgA-SEQ protocol.<br><br>RESULTS: We show, in various settings of complexity ranging from simple bacterial mixtures to human fecal samples, that our magnetic 96-well plate-based ng-IgA-SEQ protocol is highly efficient at sorting and identifying IgA-coated bacteria in a high-throughput&#xa0;and time efficient&#xa0;manner. Furthermore, we performed a comparative analysis between different IgA-SEQ protocols, highlighting that the original FACS-based IgA-SEQ approach overlooks certain nuances of IgA-coated bacteria, due to the low yield of sorted bacteria. Additionally, magnetic-based ng-IgA-SEQ allows for novel downstream applications. Firstly, as a proof-of-concept, we performed metagenomic shotgun sequencing on 10 human fecal samples to identify IgA-coated bacterial strains and associated pathways and CAZymes. Secondly, we successfully isolated and cultured IgA-coated bacteria by performing the isolation protocol under anaerobic conditions.<br><br>CONCLUSIONS: Our magnetic 96-well plate-based high-throughput next-generation IgA-SEQ technology efficiently identifies a great number of IgA-coated bacteria from fecal samples. This paves the way for analyzing large cohorts as well as novel downstream applications, including shotgun metagenomic sequencing, culturomics, and various functional assays. These downstream applications are essential to unravel the role of immunostimulatory bacteria in health and disease. Video Abstract.}, }
@article {pmid39433639, year = {2025}, author = {Davidson, IM and Nikbakht, E and Haupt, LM and Ashton, KJ and Dunn, PJ}, title = {Methodological approaches in 16S sequencing of female reproductive tract in fertility patients: a review.}, journal = {Journal of assisted reproduction and genetics}, volume = {42}, number = {1}, pages = {15-37}, pmid = {39433639}, issn = {1573-7330}, mesh = {Humans ; Female ; *RNA, Ribosomal, 16S/genetics ; High-Throughput Nucleotide Sequencing/methods ; *Microbiota/genetics ; *Genitalia, Female/microbiology ; Reproductive Techniques, Assisted ; *Fertility/genetics ; Metagenomics/methods ; }, abstract = {BACKGROUND: The female genital tract microbiome has become a particular area of interest in improving assisted reproductive technology (ART) outcomes with the emergence of next-generation sequencing (NGS) technology. However, NGS assessment of microbiomes currently lacks uniformity and poses significant challenges for accurate and precise bacterial population representation.<br><br>OBJECTIVE: As multiple NGS platforms and assays have been developed in recent years for microbiome investigation-including the advent of long-read sequencing technologies-this work aimed to identify current trends and practices undertaken in female genital tract microbiome investigations.<br><br>RESULTS: Areas like sample collection and transport, DNA extraction, 16S amplification vs. metagenomics, NGS library preparation, and bioinformatic analysis demonstrated a detrimental lack of uniformity. The lack of uniformity present is a significant limitation characterised by gap discrepancies in generation and interpretation of results. Minimal consistency was observed in primer design, DNA extraction techniques, sample transport, and bioinformatic analyses.<br><br>CONCLUSION: With third-generation sequencing technology highlighted as a promising tool in microbiota-based research via full-length 16S rRNA sequencing, there is a desperate need for future studies to investigate and optimise methodological approaches of the genital tract microbiome to ensure better uniformity of methods and results interpretation to improve clinical impact.}, }
@article {pmid39432998, year = {2024}, author = {Ma, ZS and Li, L}, title = {Identifications of the potential in-silico biomarkers in lung cancer tissue microbiomes.}, journal = {Computers in biology and medicine}, volume = {183}, number = {}, pages = {109231}, doi = {10.1016/j.compbiomed.2024.109231}, pmid = {39432998}, issn = {1879-0534}, mesh = {Humans ; *Lung Neoplasms/microbiology/metabolism ; *Microbiota ; *Biomarkers, Tumor/genetics/metabolism ; Metagenome ; Computer Simulation ; }, abstract = {It is postulated that the tumor tissue microbiome is one of the enabling characteristics that can either promote or suppress the ability of tumors to acquire certain hallmarks of cancer. This underscores its critical importance in carcinogenesis, cancer progression, and therapy responses. However, characterizing the tumor microbiomes is extremely challenging because of their low biomass and severe difficulties in controlling laboratory-borne contaminants, which is further aggravated by lack of comprehensively effective computational approaches to identify unique or enriched microbial species associated with cancers. Here we take advantage of a recent computational framework by Ma (2024), termed metagenome comparison (MC) framework (MCF), which can detect treatment-specific, unique or enriched OMUs (operational metagenomic unit), or US/ES (unique/enriched species) when adapted for this study. We apply the MCF to reanalyze four lung cancer tissue microbiome datasets, which include samples from Lung Adenocarcinoma (LUAD), Lung Squamous Cell Carcinoma (LUSC), and their adjacent normal tissue (NT) controls. Our analysis is structured around three distinct schemes: Scheme I-separately detecting the US/ES for each of the four lung cancer microbiome datasets; Scheme II-consolidation of the four datasets followed by detection of US/ES in the combined datasets; Scheme III-construction of the union and intersection sets of US/ES derived from the results of the preceding two schemes. The generated lists of US/ES, including enriched microbial phyla, likely hold significant biomedical value for developing diagnostic and prognostic biomarkers for lung cancer risk assessment, improving the efficacy of immunotherapy, and designing novel microbiome-based therapies in lung cancer research.}, }
@article {pmid39432783, year = {2024}, author = {Oguro-Igashira, E and Murakami, M and Mori, R and Kuwahara, R and Kihara, T and Kohara, M and Fujiwara, M and Motooka, D and Okuzaki, D and Arase, M and Toyota, H and Peng, S and Ogino, T and Kitabatake, Y and Morii, E and Hirota, S and Ikeuchi, H and Umemoto, E and Kumanogoh, A and Takeda, K}, title = {The pyruvate-GPR31 axis promotes transepithelial dendrite formation in human intestinal dendritic cells.}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {121}, number = {44}, pages = {e2318767121}, pmid = {39432783}, issn = {1091-6490}, support = {JP21H050430//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; JP21K07895//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; JP21gm1010004//Japan Agency for Medical Research and Development (AMED)/ ; JPMJSP213//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; J178501002//BD Biosciences (Becton Dickenson Biosciences)/ ; }, mesh = {Humans ; *Receptors, G-Protein-Coupled/metabolism ; *Dendritic Cells/metabolism ; *Pyruvic Acid/metabolism ; Intestinal Mucosa/metabolism/cytology ; Dendrites/metabolism ; Gastrointestinal Microbiome ; Signal Transduction ; Induced Pluripotent Stem Cells/metabolism/cytology ; Organoids/metabolism ; Intestines/cytology ; }, abstract = {The intestinal lumen is rich in gut microbial metabolites that serve as signaling molecules for gut immune cells. G-protein-coupled receptors (GPCRs) sense metabolites and can act as key mediators that translate gut luminal signals into host immune responses. However, the impacts of gut microbe-GPCR interactions on human physiology have not been fully elucidated. Here, we show that GPR31, which is activated by the gut bacterial metabolite pyruvate, is specifically expressed on type 1 conventional dendritic cells (cDC1s) in the lamina propria of the human intestine. Using human induced pluripotent stem cell-derived cDC1s and a monolayer human gut organoid coculture system, we show that cDC1s extend their dendrites toward pyruvate on the luminal side, forming transepithelial dendrites (TED). Accordingly, GPR31 activation via pyruvate enhances the fundamental function of cDC1 by allowing efficient uptake of gut luminal antigens, such as dietary compounds and bacterial particles through TED formation. Our results highlight the role of GPCRs in tuning the human gut immune system according to local metabolic cues.}, }
@article {pmid39432094, year = {2024}, author = {Shafana Farveen, M and Narayanan, R}, title = {Omic-driven strategies to unveil microbiome potential for biodegradation of plastics: a review.}, journal = {Archives of microbiology}, volume = {206}, number = {11}, pages = {441}, pmid = {39432094}, issn = {1432-072X}, mesh = {*Biodegradation, Environmental ; *Plastics/metabolism ; *Microbiota ; Bacteria/metabolism/genetics/classification ; Proteomics ; Genomics ; Microbial Consortia ; }, abstract = {Plastic waste accumulation has lately been identified as the leading and pervasive environmental concern, harming all living beings, natural habitats, and the global market. Given this issue, developing ecologically friendly solutions, such as biodegradation instead of standard disposal, is critical. To effectively address and develop better strategies, it is critical to understand the inter-relationship between microorganisms and plastic, the role of genes and enzymes involved in this process. However, the complex nature of microbial communities and the diverse mechanisms involved in plastic biodegradation have hindered the development of efficient plastic waste degradation strategies. Omics-driven approaches, encompassing genomics, transcriptomics and proteomics have revolutionized our understanding of microbial ecology and biotechnology. Therefore, this review explores the application of omics technologies in plastic degradation studies and discusses the key findings, challenges, and future prospects of omics-based approaches in identifying novel plastic-degrading microorganisms, enzymes, and metabolic pathways. The integration of omics technologies with advanced molecular technologies such as the recombinant DNA technology and synthetic biology would guide in the optimization of microbial consortia and engineering the microbial systems for enhanced plastic biodegradation under various environmental conditions.}, }
@article {pmid39432083, year = {2024}, author = {Xu, X and Liu, X and Liu, L and Chen, J and Guan, J and Luo, D}, title = {Metagenomic and transcriptomic profiling of the hypoglycemic and hypotriglyceridemic actions of Tremella fuciformis-derived polysaccharides in high-fat-diet- and streptozotocin-treated mice.}, journal = {Food &amp; function}, volume = {15}, number = {22}, pages = {11096-11114}, doi = {10.1039/d4fo01870b}, pmid = {39432083}, issn = {2042-650X}, mesh = {Animals ; Mice ; *Diet, High-Fat/adverse effects ; *Hypoglycemic Agents/pharmacology ; Male ; *Basidiomycota/chemistry ; *Gastrointestinal Microbiome/drug effects ; *Diabetes Mellitus, Experimental/drug therapy ; *Polysaccharides/pharmacology ; Gene Expression Profiling ; Streptozocin ; Blood Glucose/metabolism ; Metagenomics ; Transcriptome ; }, abstract = {Mushroom polysaccharides have great anti-diabetes potential. The fruiting body of Tremella fuciformis is rich in polysaccharides. However, few studies have been performed to date on T. fuciformis-derived polysaccharides (TPs) in terms of anti-diabetes potential. Our previous studies showed that novel TPs with medium molecular weights exhibited the highest anti-skin aging activities among the tested samples in D-galactose-treated mice. In the present study, the effects of these novel TPs, named TP, on high-fat-diet- and streptozotocin-treated mice were assessed, and their potential biological mechanisms were explored by metagenomic and transcriptomic analyses. Oral administration of TP markedly reduced blood glucose and TG levels, alleviated emaciation, improved anti-oxidant capacity, and protected the functions of β-cells at a dose of 100 mg kg[-1] in diabetic mice. Meanwhile, the taxonomic compositions and functional properties of fecal microbiota were altered considerably by TP, as evidenced by partial restoration of the imbalanced gut microbiota and the higher abundances of Bacteroides, Phocaeicola, Bifidobacterium, and Alistipes compared to the model mice, corresponding to the upregulation of four enriched KEGG pathways of microbial communities such as the digestive system, cardiovascular disease, parasitic infectious disease, and cell growth and death. Further transcriptomic analysis of liver tissues identified 35 enriched KEGG pathways associated with metabolism and cellular signaling processes in response to TP. These results demonstrated the biological mechanisms underlying the hypoglycemic and hypotriglyceridemic activities of TP. The findings expanded our understanding of the anti-diabetic mechanisms for mushroom polysaccharides and provided new clues for future studies.}, }
@article {pmid39431789, year = {2024}, author = {Bickerstaff, JRM and Walsh, T and Court, L and Pandey, G and Ireland, K and Cousins, D and Caron, V and Wallenius, T and Slipinski, A and Rane, R and Escalona, HE}, title = {Chromosome Structural Rearrangements in Invasive Haplodiploid Ambrosia Beetles Revealed by the Genomes of Euwallacea fornicatus (Eichhoff) and Euwallacea similis (Ferrari) (Coleoptera, Curculionidae, Scolytinae).}, journal = {Genome biology and evolution}, volume = {16}, number = {11}, pages = {}, pmid = {39431789}, issn = {1759-6653}, support = {//ResearchPlus CSIRO Early Research Career Fellowship/ ; //Zimmerman Trust/ ; //ANIC-NRCA-CSIRO/ ; }, mesh = {Animals ; *Weevils/microbiology/genetics ; *Genome, Insect ; *Introduced Species ; Haploidy ; Chromosomes, Insect ; Coleoptera/microbiology/genetics ; }, abstract = {Bark and ambrosia beetles are among the most ecologically and economically damaging introduced plant pests worldwide. Life history traits including polyphagy, haplodiploidy, inbreeding polygyny, and symbiosis with fungi contribute to their dispersal and impact. Species vary in their interactions with host trees, with many attacking stressed or recently dead trees, such as the globally distributed Euwallacea similis (Ferrari). Other species, like the Polyphagous Shot Hole Borer Euwallacea fornicatus (Eichhoff), can attack over 680 host plants and is causing considerable economic damage in several countries. Despite their notoriety, publicly accessible genomic resources for Euwallacea Hopkins species are scarce, hampering our understanding of their invasive capabilities as well as modern control measures, surveillance, and management. Using a combination of long and short read sequencing platforms, we assembled and annotated high quality (BUSCO > 98% complete) pseudo-chromosome-level genomes for these species. Comparative macrosynteny analysis identified an increased number of pseudo-chromosome scaffolds in the haplodiploid inbreeding species of Euwallacea compared to diploid outbred species, due to fission events. This suggests that life history traits can impact chromosome structure. Further, the genome of E. fornicatus had a higher relative proportion of repetitive elements, up to 17% more, than E. similis. Metagenomic assembly pipelines identified microbiota associated with both species including Fusarium fungal symbionts and a novel Wolbachia strain. These novel genomes of haplodiploid inbreeding species will contribute to the understanding of how life history traits are related to their evolution and to the management of these invasive pests.}, }
@article {pmid39431768, year = {2024}, author = {Tutagata, J and Pocquet, N and Trouche, B and Reveillaud, J}, title = {Dissection of Mosquito Ovaries, Midgut, and Salivary Glands for Microbiome Analyses at the Organ Level.}, journal = {Journal of visualized experiments : JoVE}, volume = {}, number = {212}, pages = {}, doi = {10.3791/67128}, pmid = {39431768}, issn = {1940-087X}, mesh = {Animals ; Female ; *Salivary Glands/microbiology ; *Microbiota/physiology ; *Ovary/microbiology ; Dissection/methods ; Culicidae/microbiology ; }, abstract = {The global burden of mosquito-transmitted diseases, including malaria, dengue, West Nile, Zika, Usutu, and yellow fever, continues to increase, posing a significant public health threat. With the rise of insecticide resistance and the absence of effective vaccines, new strategies are emerging that focus on the mosquito's microbiota. Nevertheless, the majority of symbionts remain resistant to cultivation. Characterizing the diversity and function of bacterial genomes in mosquito specimens, therefore, relies on metagenomics and subsequent assembly and binning strategies. The obtention and analysis of Metagenome-Assembled Genomes (MAGs) from separated organs can notably provide key information about the specific role of mosquito-associated microbes in the ovaries (the reproductive organs), the midgut (key for food digestion and immunity), or the salivary glands (essential for the transmission of vector-borne diseases as pathogens must colonize them to enter the saliva and reach the bloodstream during a blood meal). These newly reconstructed genomes can then pave the way for the development of novel vector biocontrol strategies. To this aim, it is required to isolate mosquito organs while avoiding cross-contamination between them or with microorganisms present in other mosquito organs. Here, we describe an optimized and contamination-free dissection protocol for studying mosquito microbiome at the organ level.}, }
@article {pmid39431465, year = {2024}, author = {Hagan, J}, title = {Mapping the spread of antibiotic resistance genes in the coastal microbiome.}, journal = {BioTechniques}, volume = {76}, number = {9}, pages = {411-414}, doi = {10.1080/07366205.2024.2416379}, pmid = {39431465}, issn = {1940-9818}, mesh = {*Microbiota/genetics/drug effects ; *Metagenomics/methods ; *Anti-Bacterial Agents/pharmacology ; Drug Resistance, Bacterial/genetics ; Drug Resistance, Microbial/genetics ; Bacteria/genetics/drug effects ; Seawater/microbiology ; Genes, Bacterial/genetics ; Metagenome/genetics ; }, abstract = {StandfirstCoastal environments are becoming increasingly exposed to antibiotics through anthropogenic inputs. But how could emerging metagenomic techniques be used to map the spread of antibiotic resistance genes in the coastal microbiome?[Formula: see text].}, }
@article {pmid39431056, year = {2024}, author = {Han, L and Hu, C and Du, Z and Yu, H and Du, Y and Li, L and Li, F and Wang, Y and Gao, X and Sun, X and Zhang, Z and Qin, Y}, title = {Association of glycerolipid metabolism with gut microbiota disturbances in a hamster model of high-fat diet-induced hyperlipidemia.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1439744}, pmid = {39431056}, issn = {2235-2988}, mesh = {Animals ; *Hyperlipidemias/metabolism/microbiology ; *Gastrointestinal Microbiome ; *Diet, High-Fat/adverse effects ; Cricetinae ; *Disease Models, Animal ; *Liver/metabolism ; Male ; *Lipid Metabolism ; *Feces/microbiology ; Metabolomics ; Bacteria/classification/isolation &amp; purification/metabolism/genetics ; Metagenomics ; Lipids/blood ; }, abstract = {BACKGROUND: High-fat diet (HFD)-induced hyperlipidemia, which is associated with gut microbiota disturbances, remains a major public health challenge. Glycerolipid metabolism is responsible for lipid synthesis and is thus involved in the development of hyperlipidemia. However, possible association between the HFD-modulated gut microbiome and the glycerolipid metabolism pathway remains unclear.<br><br>METHODS: Hamsters were fed a HFD for 4 weeks to establish a hyperlipidemia model. Fecal, plasma and liver samples collected from hamsters fed a HFD or a normal chow diet (NCD) were used for integrative metagenomic and untargeted metabolomic analyses to explore changes in the composition and functions of the gut microbiota, and relevant metabolites. Spearman rank correlation analysis was used to explore correlations between gut microbes and circulating glycerolipid metabolites, gut microbes and lipids, and circulating glycerolipid metabolites and lipids.<br><br>RESULTS: The gut microbial composition of HFD hamsters showed significant alterations at the phylum, genus, and species levels that were skewed toward metabolic disorders compared with that of NCD hamsters. Functional characterization by KEGG analysis identified enrichment of the glycerolipid metabolism pathway in the gut microbiome of HFD hamsters. Plasma and liver metabolomics further indicated the upregulation and enrichment of glycerolipid metabolites in HFD hamsters. The Faecalibaculum, Allobaculum, and Eubacterium genera were positively correlated with plasma glycerolipid metabolites and lipid indices.<br><br>CONCLUSION: The findings of this study suggest an association between glycerolipid metabolism and the HFD-modulated gut microbiome that is involved in the development of hyperlipidemia.}, }
@article {pmid39428758, year = {2024}, author = {Minot, SS and Mayer-Blackwell, K and Fiore-Gartland, A and Johnson, A and Self, S and Bhatti, P and Yao, L and Liu, L and Sun, X and Jinfa, Y and Kublin, J}, title = {Species- and subspecies-level characterization of health-associated bacterial consortia that colonize the human gut during infancy.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2414975}, pmid = {39428758}, issn = {1949-0984}, support = {R01 AI127100/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Infant ; *Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Female ; Metagenomics ; Microbial Consortia ; Metagenome ; Infant, Newborn ; Cohort Studies ; Cystic Fibrosis/microbiology ; }, abstract = {BACKGROUND: The human gut microbiome develops rapidly during infancy, a key window of development coinciding with the maturation of the adaptive immune system. However, little is known about the microbiome growth dynamics over the first few months of life and whether there are any generalizable patterns across human populations. We performed metagenomic sequencing on stool samples (n = 94) from a cohort of infants (n = 15) at monthly intervals in the first 6 months of life, augmenting our dataset with seven published studies for a total of 4,441 metagenomes from 1,162 infants.<br><br>RESULTS: Strain-level de novo analysis was used to identify 592 of the most abundant organisms in the infant gut microbiome. Previously unrecognized consortia were identified which exhibited highly correlated abundances across samples and were composed of diverse species spanning multiple genera. Analysis of a published cohort of infants with cystic fibrosis identified one such novel consortium of diverse Enterobacterales which was positively correlated with weight gain. While all studies showed an increased community stability during the first year of life, microbial dynamics varied widely in the first few months of life, both by study and by individual.<br><br>CONCLUSION: By augmenting published metagenomic datasets with data from a newly established cohort, we were able to identify novel groups of organisms that are correlated with measures of robust human development. We hypothesize that the presence of these groups may impact human health in aggregate in ways that individual species may not in isolation.}, }
@article {pmid39428055, year = {2025}, author = {Hazra, D and Chawla, K and S M, F and Sintchenko, V and Magazine, R and Martinez, E and Pandey, A}, title = {The impact of anti-tuberculosis treatment on respiratory tract microbiome in pulmonary tuberculosis.}, journal = {Microbes and infection}, volume = {27}, number = {3}, pages = {105432}, doi = {10.1016/j.micinf.2024.105432}, pmid = {39428055}, issn = {1769-714X}, mesh = {Humans ; *Microbiota/drug effects ; *Tuberculosis, Pulmonary/drug therapy/microbiology ; Sputum/microbiology ; RNA, Ribosomal, 16S/genetics ; Male ; Female ; Adult ; Middle Aged ; *Bacteria/classification/genetics/isolation &amp; purification/drug effects ; *Antitubercular Agents/therapeutic use ; *Respiratory System/microbiology ; Dysbiosis/microbiology ; DNA, Bacterial/genetics ; }, abstract = {The growing evidence has underscored the significance of interactions between the host and microbiota in respiratory health, presenting a novel perspective on disease management. Yet, comprehension of the respiratory microbiome shifts before and after anti-tuberculosis treatment is limited. This study compares respiratory microbiome profiles in untreated tuberculosis (UTB) and completed TB treatment (CTB) cases with healthy controls, using 16S rRNA sequencing on sputum samples. Significant reduction in sputum microbial alpha diversity was observed in both TB groups when compared to healthy controls (P < 0.05). Beta diversity analysis showed distinct clustering (P < 0.05). Linear discriminant analysis revealed an abundance of potentially pathogenic bacterial genera like Haemophilus, Pseudomonas, and Mycobacterium in the UTB group, while Streptococcus, Rothia, and Neisseria dominated in CTB samples. Healthy sputum microbiomes were enriched with Prevotella, Fusobacterium, Porphyromonadaceae_unclassified,andPeptostreptococcus. Moreover, predicted bacterial functional pathways showed significant differences among the three groups, mainly related to nutrient metabolism. These findings indicated significant microbial dysbiosis in sputum samples recovered from patients with pulmonary TB with an elevated presence of potentially pathogenic bacteria, depletion of beneficial genera, and downregulation of several essential metabolic pathways. Further exploration of respiratory microbiome-based diagnostic biomarkers and their role in targeted treatment strategies in tuberculosis is warranted.}, }
@article {pmid39427542, year = {2024}, author = {Kuai, Y and Yao, Z and Pang, T and Wang, L and Gong, X and Cheng, Y and Liu, X and Fu, Q and Wang, S}, title = {Chronic dietary deoxynivalenol exposure interferes the intestinal microbial community structure and antibiotic resistome in laying hens.}, journal = {Ecotoxicology and environmental safety}, volume = {286}, number = {}, pages = {117213}, doi = {10.1016/j.ecoenv.2024.117213}, pmid = {39427542}, issn = {1090-2414}, mesh = {Animals ; *Trichothecenes/toxicity ; *Chickens/microbiology ; *Gastrointestinal Microbiome/drug effects ; Female ; *Animal Feed/analysis ; Drug Resistance, Microbial/genetics ; Intestines/drug effects/microbiology ; Diet/veterinary ; Dietary Exposure ; }, abstract = {Antibiotic resistance genes (ARGs) are critical emerging pollutants that have attracted considerable attention. Deoxynivalenol (DON) is one of the most prevalent mycotoxins in cereal crops worldwide, arising severe health hazards to both humans and animals. Even if numerous researches argue in favor of a notorious influence of DON on the gut, the effects of dietary DON exposure on the ARG profile in poultry intestine remain obscure. In this study, two separate feeding experiments using Jing Tint 6 laying hens exposed to 4.5 or 9.0 mg/kg DON were performed to explore the impact of dietary DON exposure on the microbial community structure and the profiles of ARGs in the intestine via 16S rDNA sequencing and metagenomics sequencing, respectively. In addition, growth performance and intestinal barrier function were also determined to assess the feasibility of using DON-contaminated feedstuffs inappropriate for pigs' consumption in laying hens. Chronic ingestion of DON at 9.0 mg/kg did not alter zootechnical parameters. However, histomorphological impairments were observed in liver and jejunum. Additionally, metagenomic sequencing revealed that dietary DON exposure at 9.0 mg/kg level dramatically changed the gut microbial structure and shifted the ARG profile. The abundance of tetracycline ARG subtype in the layer cecum was decreased, whereas the abundance of vancomycin ARG subtype was increased upon DON exposure. Co-occurrence network analysis identified that Prevotella was the major ARG host in the intestine of laying hens. In summary, our findings demonstrated that DON-contaminated feedstuffs inappropriate for pigs' consumption should be prudently used in hen production, and shed new light on the interactions between mycotoxins and ARGs in the poultry intestine.}, }
@article {pmid39427349, year = {2025}, author = {Zhou, L and Zhang, X and Zhang, X and Wu, P and Wang, A}, title = {Insights into the carbon and nitrogen metabolism pathways in mixed-autotrophy/heterotrophy anammox consortia in response to temperature reduction.}, journal = {Water research}, volume = {268}, number = {Pt A}, pages = {122642}, doi = {10.1016/j.watres.2024.122642}, pmid = {39427349}, issn = {1879-2448}, mesh = {*Nitrogen/metabolism ; *Carbon/metabolism ; *Temperature ; *Autotrophic Processes ; Denitrification ; Heterotrophic Processes ; Microbial Consortia ; Oxidation-Reduction ; }, abstract = {While the multi-coupled anammox system boasts a substantial research foundation, the specific characteristics of its synergistic metabolic response to decreased temperatures, particularly within the range of 13-15 °C, remained elusive. In this study, we delve into the intricate carbon and nitrogen metabolism pathways of mixed-autotrophy/heterotrophy anammox consortia under conditions of temperature reduction. Our macrogenomic analyses reveal a compelling phenomenon: the stimulation of functional genes responsible for complete denitrification, suggesting an enhancement of this process during temperature reduction. This adaptation likely contributes to maintaining system performance amidst environmental challenges. Further metabolic functional recombination analyses highlight a dramatic shift in microbial community composition, with denitrifying MAGs (metagenome-assembled genomes) experiencing a substantial increase in abundance (up to 200 times) compared to autotrophic MAGs. This proliferation underscores the strong stimulatory effect of temperature reduction on denitrifying species. Notably, autotrophic MAGs play a pivotal role in supporting the glycolytic processes of denitrifying MAGs, underscoring the intricate interdependencies within the consortia. Moreover, metabolic variations in amino acid composition among core MAGs emerge as a crucial adaptation mechanism. These differences facilitate the preservation of enzyme activity and enhance the consortia's resilience to low temperatures. Together, these findings offer a comprehensive understanding of the microbial synergistic metabolism within mixed-autotrophy/heterotrophy anammox consortia under temperature reduction, shedding light on their metabolic flexibility and resilience in dynamic environments.}, }
@article {pmid39427267, year = {2025}, author = {Singh, AB and Paul, T and Shukla, SP and Kumar, S and Kumar, S and Kumar, G and Kumar, K}, title = {Gut microbiome as biomarker for triclosan toxicity in Labeo rohita: bioconcentration, immunotoxicity and metagenomic profiling.}, journal = {Ecotoxicology (London, England)}, volume = {34}, number = {1}, pages = {102-111}, pmid = {39427267}, issn = {1573-3017}, support = {DST/TMD-EWO-WTI/2K19/EWFH/2019/214//Department of Science and Technology, Ministry of Science and Technology, India/ ; }, mesh = {Animals ; *Triclosan/toxicity ; *Gastrointestinal Microbiome/drug effects ; *Water Pollutants, Chemical/toxicity ; *Cyprinidae/microbiology/immunology ; Biomarkers/metabolism ; Metagenomics ; RNA, Ribosomal, 16S ; Environmental Monitoring/methods ; Bacteria/drug effects ; }, abstract = {Triclosan (TCS) is a lipophilic, broad spectrum antimicrobial agent commonly used in personal care products with a projected continuous escalation in aquatic environments in the post COVID 19 era. There is rich documentation in the literature on the alteration of physiological responses in fish due to TCS exposure; however, studies on gut associated bacteria of fish are still scarce. This is the first attempt to determine changes in bacterial community structure due to exposure of TCS on Labeo rohita, a commercially essential freshwater species, using 16S V3-V4 region ribosomal RNA (rRNA) next-generation sequencing (NGS). Chronic exposure of TCS at environmentally realistic concentrations viz. 1/5th (T1: 0.129 mg/L) and 1/10th (T2: 0.065 mg/L) of LC50 for 28 days resulted in the dose dependent bioconcentration of TCS in the fish gut. Prolonged exposure to TCS leads to disruption of gut bacteria evidenced by down regulation of the host immune system. Additionally, high-throughput sequencing analysis showed alternation in the abundance and diversity of microbial communities in the gut, signifying Proteobacteria and Verrucomicrobia as dominant phyla. Significant changes were also observed in the relative abundance of Chloroflexi and Gammatimonadetes phyla in TCS exposed groups. The study revealed that gut microbiome can be used as a biomarker in assessing the degree of TCS toxicity in commercially important fish species.}, }
@article {pmid39426981, year = {2024}, author = {Lu, C and Liu, D and Wu, Q and Zeng, J and Xiong, Y and Luo, T}, title = {EphA2 blockage ALW-II-41-27 alleviates atherosclerosis by remodeling gut microbiota to regulate bile acid metabolism.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {108}, pmid = {39426981}, issn = {2055-5008}, support = {2023NSFSC1631//Department of Science and Technology of Sichuan Province (Sichuan Provincial Department of Science and Technology)/ ; 2023YFS0116//Department of Science and Technology of Sichuan Province (Sichuan Provincial Department of Science and Technology)/ ; 2022YFS0604//Department of Science and Technology of Sichuan Province (Sichuan Provincial Department of Science and Technology)/ ; Q22066//Education Department of Sichuan Province/ ; }, mesh = {Animals ; *Atherosclerosis/metabolism/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Bile Acids and Salts/metabolism ; Mice ; *Receptor, EphA2/metabolism ; *Diet, High-Fat/adverse effects ; Male ; Humans ; Disease Models, Animal ; Plaque, Atherosclerotic/etiology ; Mice, Inbred C57BL ; Bacteria/classification/isolation &amp; purification/genetics/metabolism ; Dysbiosis ; }, abstract = {Coronary artery disease (CAD), a critical condition resulting from systemic inflammation, metabolic dysfunction, and gut microbiota dysbiosis, poses a global public health challenge. ALW-II-41-27, a specific inhibitor of the EphA2 receptor, has shown anti-inflammatory prosperities. However, the impact of ALW-II-41-27 on atherosclerosis has not been elucidated. This study aimed to examine the roles of pharmacologically inhibiting EphA2 and the underlying mechanism in ameliorating atherosclerosis. ALW-II-41-27 was administered to apoE[-/-] mice fed a high-fat diet via intraperitoneal injection. We first discovered that ALW-II-41-27 led to a significant reduction in atherosclerotic plaques, evidenced by reduced lipid and macrophage accumulation, alongside an increase in collagen and smooth muscle cell content. ALW-II-41-27 also significantly lowered plasma and hepatic cholesterol levels, as well as the colonic inflammation. Furthermore, gut microbiota was analyzed by metagenomics and plasma metabolites by untargeted metabolomics. ALW-II-41-27-treated mice enriched Enterococcus, Akkermansia, Eggerthella and Lactobaccilus, accompanied by enhanced secondary bile acids production. To explore the causal link between ALW-II-41-27-associated gut microbiota and atherosclerosis, fecal microbiota transplantation was employed. Mice that received ALW-II-41-27-treated mouse feces exhibited the attenuated atherosclerotic plaque. In clinical, lower plasma DCA and HDCA levels were determined in CAD patients using quantitative metabolomics and exhibited a negative correlation with higher monocytes EphA2 expression. Our findings underscore the potential of ALW-II-41-27 as a novel therapeutic agent for atherosclerosis, highlighting its capacity to modulate gut microbiota composition and bile acid metabolism, thereby offering a promising avenue for CAD.}, }
@article {pmid39426578, year = {2025}, author = {Tao, Y and Zeng, Y and Zeng, R and Gou, X and Zhou, X and Zhang, J and Nhamdriel, T and Fan, G}, title = {The total alkaloids of Berberidis Cortex alleviate type 2 diabetes mellitus by regulating gut microbiota, inflammation and liver gluconeogenesis.}, journal = {Journal of ethnopharmacology}, volume = {337}, number = {Pt 3}, pages = {118957}, doi = {10.1016/j.jep.2024.118957}, pmid = {39426578}, issn = {1872-7573}, mesh = {Animals ; *Diabetes Mellitus, Type 2/drug therapy/metabolism ; *Alkaloids/pharmacology ; Male ; *Gastrointestinal Microbiome/drug effects ; *Liver/drug effects/metabolism ; *Diabetes Mellitus, Experimental/drug therapy ; Rats ; *Rats, Sprague-Dawley ; *Hypoglycemic Agents/pharmacology ; *Gluconeogenesis/drug effects ; Inflammation/drug therapy ; Diet, High-Fat/adverse effects ; Plant Extracts/pharmacology ; Blood Glucose/drug effects ; }, abstract = {Type 2 diabetes mellitus (T2DM) has become a public health problem worldwide. There is growing interest in finding drugs to treat T2DM from herbal medicine. Berberidis Cortex is a traditional Tibetan herb commonly used in the treatment of T2DM, and alkaloids are its main active components. However, the anti-diabetic mechanisms of the total alkaloids of Berberidis Cortex (TBC) remain unclear.<br><br>AIM OF THE STUDY: The aim of this study was to evaluate the anti-T2DM efficacy of TBC and reveal the mechanisms behind its effects.<br><br>MATERIALS AND METHODS: UPLC-Q-Exactive Orbitrap MS technology was employed to qualitatively identify alkaloid components in TBC. T2DM rat models were induced by high-fat diet combined with streptozotocin, and then treated with different doses of TBC (43.5, 87, 174&#xa0;mg/kg/d) for 40 days. Biochemical parameters, such as fasting blood glucose (FBG), oral glucose tolerance test (OGTT), glycated serum protein (GSP), homeostatic model assessment of insulin resistance (HOMA-IR), total cholesterol (TC), triglycerides (TG), and low-density lipoprotein cholesterol (LDL-C), alongside H&amp;E and PAS staining were used to evaluate the anti-diabetic activity of TBC. More importantly, metagenomics, transcriptomics, targeted metabolomics, and Western blot analysis were integrated to reveal the underlying mechanisms of TBC for T2DM treatment.<br><br>RESULTS: TBC significantly reduced the levels of FBG, OGTT, GSP, HOMA-IR, TC, TG, and LDL-C, and improved the histopathological alterations of pancreatic and liver tissues in T2D rats. It also reduced serum levels of lipopolysaccharide (LPS) and several pro-inflammatory cytokines (IL-6, IL-1&#x3b2; and TNF-&#x3b1;). Gut microbiome analysis by metagenomics proved that TBC could improve gut microbiota dysbiosis, including an increase in some beneficial bacteria (e.g., Bifidobacterium pseudolongum and Lactobacillus acidophilus) and a decrease in some harmful bacteria (e.g., Marvinbryantia and Parabacteroides). Western blot analysis found that TBC significantly up-regulated the expression of three intestinal barrier related tight junction proteins (ZO-1, occludin, and claudin-1), and effectively suppressed several key proteins in the TLR4/MyD88/NF-&#x3ba;B inflammatory cascade, including TLR4, MyD88 and p-NF-&#x3ba;B p65. Moreover, hepatic transcriptomics analysis further revealed the regulatory role of TBC on gluconeogenesis related genes, such as Pgc, and Creb1. Targeted metabolomics and Western blot analysis showed that TBC improved BAs dysregulation in T2DM rats, specifically increasing TCDCA and CA levels, thereby activating several proteins in the FXR/FGF15 signaling axis (i.e., FXR, FGF15 and FGFR4), and then decreased the expression of p-CREB1 and PGC-1&#x3b1; to inhibit liver gluconeogenesis.<br><br>CONCLUSIONS: TBC can significantly improve hyperglycemia, insulin resistance, hyperlipidemia, and inflammation in T2DM rats. The mechanism is related to the regulation of multiple links, including improving gut microbiota dysbiosis, protecting the intestinal barrier by up-regulating the expression of three tight junction proteins, reducing inflammation by inhibiting the LPS/TLR4/MyD88/NF-&#x3ba;B pathway, and inhibiting liver gluconeogenesis by regulating BAs/FXR/FGF15 and CREB1/PGC-1&#x3b1; signaling pathways.}, }
@article {pmid39426111, year = {2024}, author = {Shang, KM and Elsheikha, HM and Ma, H and Wei, YJ and Zhao, JX and Qin, Y and Li, JM and Zhao, ZY and Zhang, XX}, title = {Metagenomic profiling of cecal microbiota and antibiotic resistome in rodents.}, journal = {Ecotoxicology and environmental safety}, volume = {286}, number = {}, pages = {117186}, doi = {10.1016/j.ecoenv.2024.117186}, pmid = {39426111}, issn = {1090-2414}, mesh = {Animals ; *Cecum/microbiology ; *Gastrointestinal Microbiome/drug effects/genetics ; *Rodentia/microbiology ; *Anti-Bacterial Agents/pharmacology ; Bacteria/genetics/drug effects/classification ; Drug Resistance, Microbial/genetics ; Metagenomics ; Rats ; Drug Resistance, Bacterial/genetics ; High-Throughput Nucleotide Sequencing ; Metagenome ; }, abstract = {The rodent gut microbiota is a known reservoir of antimicrobial resistance, yet the distribution of antibiotic resistance genes (ARGs) within rodent cecal microbial communities and the specific bacterial species harboring these ARGs remain largely underexplored. This study employed high-throughput sequencing of 122 samples from five distinct rodent species to comprehensively profile the diversity and distribution of ARGs and to identify the bacterial hosts of these genes. A gene catalog of the rodent cecal microbiome was constructed, comprising 22,757,369 non-redundant genes. Analysis of the microbial composition and diversity revealed that Bacillota and Bacteroidota were the dominant bacterial phyla across different rodent species, with significant variations in species composition among the rodents. In total, 3703 putative antimicrobial resistance protein-coding genes were identified, corresponding to 392 unique ARG types classified into 32 resistance classes. The most enriched ARGs in the rodent cecal microbiome were associated with multidrug resistance, followed by glycopeptide and elfamycin antibiotics. Procrustes analysis demonstrated a correlation between the structure of the microbial community and the resistome. Metagenomic assembly-based host tracking indicated that most ARG-carrying contigs originated from the bacterial family Oscillospiraceae. Additionally, 130 ARGs showed significant correlations with mobile genetic elements. These findings provide new insights into the cecal microbiota and the prevalence of ARGs across five rodent species. Future research on a wider range of wild rodent species carrying ARGs will further elucidate the mechanisms underlying the transmission of antimicrobial resistance.}, }
@article {pmid39425237, year = {2024}, author = {Zelasko, S and Swaney, MH and Sandstrom, S and Davenport, TC and Seroogy, CM and Gern, JE and Kalan, LR and Currie, CR}, title = {Upper respiratory microbial communities of healthy populations are shaped by niche and age.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {206}, pmid = {39425237}, issn = {2049-2618}, support = {U19AI142720/NH/NIH HHS/United States ; U19AI104317/NH/NIH HHS/United States ; F30AI169759/NH/NIH HHS/United States ; U19 AI142720/AI/NIAID NIH HHS/United States ; T32AI055397/NH/NIH HHS/United States ; U19 AI104317/AI/NIAID NIH HHS/United States ; }, mesh = {Humans ; *Microbiota ; *Mouth/microbiology ; Adult ; Infant ; Female ; *Bacteria/classification/genetics/isolation &amp; purification ; Male ; Age Factors ; Child, Preschool ; Healthy Volunteers ; Metagenomics/methods ; Respiratory System/microbiology ; Metagenome ; }, abstract = {BACKGROUND: Alterations in upper respiratory microbiomes have been implicated in shaping host health trajectories, including by limiting mucosal pathogen colonization. However, limited comparative studies of respiratory microbiome development and functioning across age groups have been performed. Herein, we perform shotgun metagenomic sequencing paired with pathogen inhibition assays to elucidate differences in nasal and oral microbiome composition and intermicrobial interactions across healthy 24-month-old infant (n = 229) and adult (n = 100) populations.<br><br>RESULTS: We find that beta diversity of nasal and oral microbiomes varies with age, with nasal microbiomes showing greater population-level variation compared to oral microbiomes. Infant microbiome alpha diversity was significantly lower across nasal samples and higher in oral samples, relative to adults. Accordingly, we demonstrate significant differences in genus- and species-level composition of microbiomes between sites and age groups. Antimicrobial resistome patterns likewise varied across body sites, with oral microbiomes showing higher resistance gene abundance compared to nasal microbiomes. Biosynthetic gene clusters encoding specialized metabolite production were found in higher abundance across infant oral microbiomes, relative to adults. Investigation of pathogen inhibition revealed greater inhibition of gram-negative and gram-positive bacteria by oral commensals, while nasal isolates had higher antifungal activity.<br><br>CONCLUSIONS: In summary, we identify significant differences in the microbial communities inhabiting nasal and oral cavities of healthy infants relative to adults. These findings inform our understanding of the interactions impacting respiratory microbiome composition and functions related to colonization resistance, with important implications for host health across the lifespan. Video Abstract.}, }
@article {pmid39425038, year = {2024}, author = {Woldeyohannis, NN and Desta, AF}, title = {Metagenome-based microbial community analysis of urine-derived fertilizer.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {418}, pmid = {39425038}, issn = {1471-2180}, mesh = {Humans ; *Fertilizers/analysis ; *Urine/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification ; *Struvite ; *Metagenome ; Microbiota/genetics ; Metagenomics/methods ; DNA, Bacterial/genetics ; Phylogeny ; }, abstract = {Phosphorus is essential for food production and its supply is limited. Urine is an excellent source of phosphorus and one way to produce fertilizer is through conversion of urine to struvite (MgNH3PO4.6H2O). The present study aimed to understand the bacterial portion of the microbial community composition and dynamics of plasmid-mediated antimicrobial resistant genes during the optimized process of struvite production from composite human urine. Samples for DNA extraction was collected from fresh urine, stored urine and struvite during the process of struvite production. Shotgun metagenomic analysis was employed to understand the bacterial community. The most dominant phyla in the fresh and stored urine samples were Pseudomonadata, which comprised of 60% and 43% respectively, followed by Bacillota, comprised of 25% and 39% respectively. The struvite sample was dominated by the phylum Bacilliota (61%), Pseudomonadota (18%) and bacteroidota (12%). Members of the above phyla persisted in dominating each sample accordingly. Member of the family Morganellaceae was dominant in the fresh sample while the stored urine and struvite samples were dominated by the family Clostridiaceae. A decrease of members of the class Gammaproteobacteria was observed from the fresh to the struvite sample though not statistically significant. The genus Pseudomonas remained to be the most dominant member of Gammaproteobacteria in the fresh and stored urine sample with OTU count of 12,116 and 6,155 with a marked decrease by half in the stored sample. On the other hand, members of the genera Clostridium, Enterococcus, Bacteroides in the stored samples and Clostridium, Alkaliphilus and Pseudomonas in the struvite samples were dominant. 96% of the identified genera were shared in all the samples and the antimicrobial resistance genes (ARGs) identified in the fresh urine were shared by the struvite but not by the stored urine (e.g. sul, cat, aph and aac members). The presence of high abundance of ARGs in struvite needs attention in the persistence and transmissibility of the ARGs before application for agriculture.}, }
@article {pmid39423892, year = {2024}, author = {Ouyang, W and Huang, Y and Li, C and Huang, W and Yuan, S and Liu, H}, title = {Control of dissolved H2 concentration enhances electron generation, transport and TCE reduction by indigenous microbial community.}, journal = {The Science of the total environment}, volume = {955}, number = {}, pages = {177014}, doi = {10.1016/j.scitotenv.2024.177014}, pmid = {39423892}, issn = {1879-1026}, mesh = {*Trichloroethylene/metabolism ; *Biodegradation, Environmental ; *Water Pollutants, Chemical/metabolism/analysis ; Hydrogen/metabolism ; Microbiota ; Electron Transport ; Bacteria/metabolism ; Oxidation-Reduction ; Electrons ; Groundwater/chemistry/microbiology ; }, abstract = {Electrokinetic enhanced bioremediation (EK-Bio) is practical for trichloroethene (TCE) dechlorination because the cathode can produce a wide range of dissolved H2 (DH) concentrations of 1.3-0 mg/L from the electrode to the aquifer. In this study, TCE dechlorination was investigated under different DH concentrations. The mechanisms were discussed by analyzing the microbial community structure and abundance of organohalide-respiring bacteria (OHRB) using 16S rRNA, and the gene abundances of key enzymes in the TCE electron transport chain using metagenomic analysis. The results showed that the moderate DH concentration of 0.19-0.53 mg/L exhibited the most pronounced TCE dechlorination, even better than the higher DH concentrations, due to the optimal redox environment, the enrichments of OHRB, reductive dehalogenase (rdhA) genes and key enzyme genes in the electron generation and transport chain. More electrons were obtained from H2 metabolism by Dehalobacter by promoting the formation of [NiFe] hydrogenase (HupS/L/C) or from glycolysis by versatile OHRB by stimulating the formation of formate and enriching formate dehydrogenase (FDH) under moderate DH conditions. In addition, the enhanced amino acid metabolism improved the vitamin K cycle for electron transport and enriched the reductive dechlorinating enzyme (RDase) genes. This study identifies the optimal DH concentration that facilitates bioremediation efficiency, provides insights into microbial community shifts and key enzymatic pathways in EK-Bio remediation.}, }
@article {pmid39423213, year = {2024}, author = {Ma, J and Yang, X and He, J}, title = {Comprehensive gut microbiota composition and microbial interactions among the three age groups.}, journal = {PloS one}, volume = {19}, number = {10}, pages = {e0305583}, pmid = {39423213}, issn = {1932-6203}, mesh = {Humans ; *Gastrointestinal Microbiome ; Aged ; Aged, 80 and over ; Adult ; Middle Aged ; Male ; Aging ; Young Adult ; Microbial Interactions ; Female ; Bacteria/genetics/classification ; Age Factors ; Archaea/genetics ; }, abstract = {There is a growing interest in studying the microbiota associated with aging by integrating multiple longevity researches while minimizing the influence of confounding factors. Here, we reprocessed metagenomic sequencing data from four different aging research studies and evaluated potential confounding factors in order to minimize the batch effect. Subsequently, we detected the diversity and abundance of the gut microbiome in three different age cohorts. Out of 1053 different bacteria species, only four showed substantial depletion across different age groups: Ligilactobacillus ruminis, Turicibacter sp. H121, Blautia massiliensis, and Anaerostipes hadrus. Archaea accumulated more in young individuals compared to elderly and centenarians. Candida albicans was more prevalent in centenarians, but Nakaseomyces glabratus (also known as Candida glabrata) was more common in elderly adults. Shuimuvirus IME207 showed a significant increase in centenarians compared to both control groups. In addition, we utilized a Fisher's exact test to investigate topological properties of differentially abundant microbiota in the co-occurrence network of each age group. Microbial signatures specific to different age stages were identified based on the condition: the reads showing differential abundance were higher compared to the other age groups. Lastly, we selected Methanosarcina sp. Kolksee for the Y group, Prevotella copri for the E group and Shuimuvirus IME207 for the C group as representatives of age-related characteristics to study how their interactions change during the aging process. Our results provide crucial insights into the gut microbiome's ecological dynamics in relation to the aging process.}, }
@article {pmid39422129, year = {2024}, author = {Kanti Nath, B and Gupta, SD and Talukder, S and Tonu, NS and Raidal, SR and Forwood, JK and Sarker, S}, title = {Metagenomic Detection of Multiple Viruses in Monk Parakeet (Myiopsitta monachus) in Australia.}, journal = {Veterinary medicine and science}, volume = {10}, number = {6}, pages = {e70083}, pmid = {39422129}, issn = {2053-1095}, mesh = {Animals ; *Feces/virology/microbiology ; *Parakeets/virology ; Bird Diseases/virology/epidemiology/microbiology ; Australia ; Adenoviridae/isolation &amp; purification/classification/genetics ; Parvoviridae/isolation &amp; purification/genetics/classification ; Phylogeny ; Circovirus/genetics/isolation &amp; purification/classification ; High-Throughput Nucleotide Sequencing/veterinary ; Victoria ; Circoviridae/isolation &amp; purification/genetics/classification ; Virome ; Metagenomics ; }, abstract = {BACKGROUND: Birds are known to harbour many pathogens, including circovirus, herpesviruses, adenoviruses and Chlamydia psittaci. Some of these pose zoonotic risks, while others, such as beak and feather disease virus (BFDV), have a significant impact on the conservation of endangered bird species.<br><br>OBJECTIVES: This study was aimed to determine the faecal virome of a group of apparently healthy Monk parakeet using high-throughput sequencing.<br><br>METHODS: Fresh faecal samples were collected from four Monk parakeets at a pet shop in Melbourne, Australia. Virus enrichment and nucleic acid extraction were performed on the faecal samples, followed by high-throughput sequencing at the Australian Genome Research Facility (AGRF).<br><br>RESULTS: Utilising an established pipeline for high-throughput sequencing data analysis, this study revealed the presence of three viruses of the families Circoviridae, Parvoviridae and Adenoviridae. Subsequent sequence comparison and phylogenetic analyses further confirmed that the detected viruses belong to the genera Chaphamaparvovirus (unassigned species), Circovirus (species Circovirus parrot) and Siadenovirus (species Siadenovirus viridis).<br><br>CONCLUSION: Despite non-pathogenicity, the existence of multiple viruses within a bird species underscores the risk of these viruses spreading into the pet trade. Detection and a better understanding of avian viruses are crucial for the establishment of appropriate management and biosecurity measures in the domestic and international bird trade, which ultimately supports the conservation of vulnerable bird species.}, }
@article {pmid39420836, year = {2024}, author = {Qu, W and Xu, Y and Yang, J and Shi, H and Wang, J and Yu, X and Chen, J and Wang, B and Zhuoga, D and Luo, M and Liu, R}, title = {Berberine alters the gut microbiota metabolism and impairs spermatogenesis.}, journal = {Acta biochimica et biophysica Sinica}, volume = {57}, number = {4}, pages = {569-581}, pmid = {39420836}, issn = {1745-7270}, mesh = {Male ; *Gastrointestinal Microbiome/drug effects ; *Berberine/pharmacology ; Animals ; *Spermatogenesis/drug effects ; Mice ; Testosterone/blood ; Testis/drug effects/metabolism ; Fecal Microbiota Transplantation ; Mice, Inbred C57BL ; }, abstract = {Berberine (BBR) is used to treat diarrhea clinically. However, its reproductive toxicity is unclear. This study aims to investigate the impact of BBR on the male reproductive system. Intragastric BBR administration for 14 consecutive days results in a significant decrease in the serum testosterone concentration, epididymal sperm concentration, mating rate and fecundity of male mice. Testicular treatment with testosterone propionate (TP) partially reverses the damage caused by BBR to the male reproductive system. Mechanistically, the decrease in Muribaculaceae abundance in the gut microbiota of mice is the principal cause of the BBR-induced decrease in the sperm concentration. Both fecal microbiota transplantation (FMT) and polyethylene glycol (PEG) treatment demonstrate that Muribaculaceae is necessary for spermatogenesis. The intragastric administration of Muribaculaceae intestinale to BBR-treated mice restores the sperm concentration and testosterone levels. Metabolomic analysis reveals that BBR affects arginine and proline metabolism, of which ornithine level is downregulated. Combined analysis via 16S rRNA metagenomics sequencing and metabolomics shows that Muribaculaceae regulates ornithine level. The transcriptomic results of the testes indicate that the expressions of genes related to the low-density lipoprotein receptor (LDLR)-mediated testosterone synthesis pathway decrease after BBR administration. The transcriptional activity of the Ldlr gene in TM3 cells is increased with increased ornithine supplementation in the culture media, leading to increased testosterone synthesis. Overall, this study reveals an association between a BBR-induced decrease in Muribaculaceae abundance and defective spermatogenesis, providing a prospective therapeutic approach for addressing infertility-related decreases in serum testosterone triggered by changes in the gut microbiota composition.}, }
@article {pmid39420635, year = {2025}, author = {Li, C and Sun, L and Jia, Z and Tang, Y and Liu, X and Zhang, J and Müller, C}, title = {Microbial Inoculants Drive Changes in Soil and Plant Microbiomes and Improve Plant Functions in Abandoned Mine Restoration.}, journal = {Plant, cell &amp; environment}, volume = {48}, number = {2}, pages = {1162-1178}, doi = {10.1111/pce.15215}, pmid = {39420635}, issn = {1365-3040}, support = {//Jinchi Zhang acknowledges the funding support from Jiangsu Science and Technology Plan Project (BE2022420); the Innovation and Promotion of Forestry Science and Technology Program of Jiangsu Province (LYKJ[2021]30); the Scientific Research Project of Baishanzu National Park (2021ZDLY01); and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). Chong Li is grateful for the partial financial support from the Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX21_0915), and the China Scholarship Council (202108320300)./ ; }, mesh = {*Soil Microbiology ; *Microbiota ; *Mining ; *Plant Roots/microbiology/physiology ; Plants/microbiology/metabolism ; Soil/chemistry ; Bacteria/metabolism ; Fungi/physiology ; Environmental Restoration and Remediation/methods ; }, abstract = {The application of microbial inoculants holds promise for the sustainable restoration of abandoned mine sites by affecting soil nutrients and microbial communities. However, the responses of plant microbial communities to microbial inoculants in mine restoration remain largely unknown. To bridge this knowledge gap, we conducted a 4-year field experiment at an abandoned carbonate mine site to assess the impacts of microbial inoculants on the soil-plant microbiome. Our findings revealed that microbial inoculants significantly changed roots, fine root bacterial and fungal communities. Further, no significant correlations were observed between the soil-plant nutrient content (Z-score) and microbial alpha diversity. However, a significantly positive correlation was found between the relative abundance of the keystone ecological cluster (Module #1) and soil-plant nutrient content. The application of microbial inoculants also increased complexity, albeit decreased stability of plant microbiome networks, alongside a reduction in stochastic assembly. Conversely, they decreased the complexity but increased the stability of soil microbiome networks, accompanied by an increase in stochastic assembly. Notably, the number of specifically enriched microbiome functional traits of roots and root nodules under the microbial inoculant treatments surpassed that of the control. In summary, our findings underscored the potential of microbial inoculants to enhance soil-plant functionality at abandoned mine restoration sites.}, }
@article {pmid39420033, year = {2024}, author = {Majzoub, ME and Paramsothy, S and Haifer, C and Parthasarathy, R and Borody, TJ and Leong, RW and Kamm, MA and Kaakoush, NO}, title = {The phageome of patients with ulcerative colitis treated with donor fecal microbiota reveals markers associated with disease remission.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8979}, pmid = {39420033}, issn = {2041-1723}, support = {988415//Crohn's and Colitis Foundation (Crohn's &amp; Colitis Foundation)/ ; APP2011047//Department of Health | National Health and Medical Research Council (NHMRC)/ ; Investigator grant//Department of Health | National Health and Medical Research Council (NHMRC)/ ; Scientia fellowship//University of New South Wales (UNSW Australia)/ ; }, mesh = {Humans ; *Colitis, Ulcerative/therapy/microbiology/virology ; *Fecal Microbiota Transplantation ; *Bacteriophages/genetics/isolation &amp; purification/physiology ; *Gastrointestinal Microbiome/genetics ; *Feces/microbiology/virology ; Double-Blind Method ; Male ; Female ; Metagenomics/methods ; Adult ; Dysbiosis/microbiology/therapy ; Middle Aged ; Virome/genetics ; Remission Induction ; Anti-Bacterial Agents/therapeutic use ; Biomarkers ; }, abstract = {Bacteriophages are influential within the human gut microbiota, yet they remain understudied relative to bacteria. This is a limitation of studies on fecal microbiota transplantation (FMT) where bacteriophages likely influence outcome. Here, using metagenomics, we profile phage populations - the phageome - in individuals recruited into two double-blind randomized trials of FMT in ulcerative colitis. We leverage the trial designs to observe that phage populations behave similarly to bacterial populations, showing temporal stability in health, dysbiosis in active disease, modulation by antibiotic treatment and by FMT. We identify a donor bacteriophage putatively associated with disease remission, which on genomic analysis was found integrated in a bacterium classified to Oscillospiraceae, previously isolated from a centenarian and predicted to produce vitamin B complex except B12. Our study provides an in-depth assessment of phage populations during different states and suggests that bacteriophage tracking has utility in identifying determinants of disease activity and resolution.}, }
@article {pmid39419193, year = {2024}, author = {Chen, H and Zeng, M and Batool, SS and Zhao, Y and Yu, Z and Zhou, J and Liu, K and Huang, J}, title = {Metagenomic analysis reveals effects of gut microbiome in response to neoadjuvant chemoradiotherapy in advanced rectal cancer.}, journal = {Genomics}, volume = {116}, number = {6}, pages = {110951}, doi = {10.1016/j.ygeno.2024.110951}, pmid = {39419193}, issn = {1089-8646}, mesh = {Humans ; *Rectal Neoplasms/therapy/microbiology/genetics/metabolism ; *Gastrointestinal Microbiome ; *Neoadjuvant Therapy ; Chemoradiotherapy ; Female ; Male ; Middle Aged ; Metagenomics ; Aged ; Metagenome ; Feces/microbiology ; Bacteria/genetics/classification/metabolism ; }, abstract = {Neoadjuvant chemoradiotherapy can enhance survival rate of patients with advanced rectal cancer, but its effectiveness varies considerably. Previous studies have indicated that gut microbes may serve as biomarkers for predicting treatment efficacy. However, the specific roles of the gut microbiome in patients who have good response to nCRT remains unclear. In this study, shotgun metagenomic sequencing technology was used to analyze the fecal microbiome of patients with varying responses to nCRT. Our findings revealed that beneficial intestinal bacteria and genes from different metabolic pathways (carbohydrate metabolism, amino acid metabolism, and sulfur metabolism) were significantly enriched in patients with good response. Additionally, causal relationship in which microbial-derived GDP-D-rhamnose and butyrate could influence the response to nCRT was clarified. Our results offered new insights into the different response to nCRT, and provided valuable reference points for improving the effectiveness of nCRT in patients with advanced colorectal cancer.}, }
@article {pmid39418776, year = {2024}, author = {Xie, Q and Sun, J and Sun, M and Wang, Q and Wang, M}, title = {Perturbed microbial ecology in neuromyelitis optica spectrum disorder: Evidence from the gut microbiome and fecal metabolome.}, journal = {Multiple sclerosis and related disorders}, volume = {92}, number = {}, pages = {105936}, doi = {10.1016/j.msard.2024.105936}, pmid = {39418776}, issn = {2211-0356}, mesh = {*Neuromyelitis Optica/microbiology/immunology ; Humans ; *Gastrointestinal Microbiome/physiology ; *Feces/microbiology ; Animals ; Female ; Adult ; *Fecal Microbiota Transplantation ; Mice ; Male ; Metabolome/physiology ; Middle Aged ; }, abstract = {BACKGROUND: Neuromyelitis optica spectrum disorder (NMOSD) is a central nervous system inflammatory demyelinating immune-mediated ailment, which is influenced by genetic, epigenetic, and environmental elements. The escalating incidence of NMOSD in recent years implies alterations in environmental risk factors. Recent research has established a correlation between gut microbiomes and the development of NMOSD.<br><br>METHODS: Metagenomic shotgun sequencing and gas chromatography-mass spectrometry (GC-MS) were employed to assess alterations of the structure and function in the fecal microbiome, as well as levels of short-chain fatty acids (SCFAs) in fecal and blood samples, among individuals with neuromyelitis optica spectrum disorder (NMOSD) during the acute phase (n = 25), the remission phase (n = 11), and a group of healthy controls (HCs) (n = 24). We further explored the correlation between gut microbiota and the pathogenesis of NMOSD through fecal microbiota transplantation (FMT). The gut microbiome from human donors diagnosed with NMOSD or HCs was transplanted into germ-free mice, followed by an analysis of the alterations in the structure and functionality of the transplanted mice's gut microbiome. Additionally, the impact of microbiome transfer on the immunity and spinal cord of germ-free mice was assessed through various techniques, including ELISA, flow cytometry, western blot, histopathology, and transcriptome sequencing.<br><br>RESULTS: (1) At the taxonomic levels of genus and species, there were significant differences in the &#x3b1;-diversity of the microbiome between HCs and NMOSD patients in the acute phase, with NMOSD patients having higher species diversity. (2) In the acute phase, the gut microbiota of NMOSD patients was characterized by Ruminococcaceae_unclassified, Campylobacter, Parabacteroides, Lactobacillus, Akkermansia, Streptococcus oralis, Clostridium leptum, Clostridium asparagiforme, Firmicutes bacterium CAG 238, and Lactobacillus fermentum. (3) The relative abundances of Coprobacter, Turicimonas, Gemmiger, Enterobacter, Roseburia sp.CAG 471, Veillonella tobetsuensis, Proteobacteria bacterium CAG 139, Ruminococcus bicirculans, Lactococcus lactis, Flavonifractor plautii, and Streptococcus cristatus were notably lower in patients experiencing remission compared to NMOSD patients in the acute phase, On the other hand, the relative abundances of Flavonifractor (P = 0.049) and Clostridium aldenense (P = 0.049) were significantly higher. Following medication, the gut microbiome distribution in NMOSD patients during remission closely resembled that of healthy controls (HCs). (4) Compared with HCs, acetate levels in the feces of patients with NMOSD in the acute phase were significantly lower. (5) In addition, we transplanted feces from NMOSD patients into germ-free mice and revealed a significant increase in the levels of IL-6, IL-17A, and IL-23 in the blood of mice belonging to the NMOSD fecal transplantation (NFMT) group. Additionally, the IL-10 level exhibited a significant reduction. Moreover, the proportion of Th17 cells displayed a significant increase, while the proportion of Treg cells exhibited a significant decrease in the spleens of NFMT mice.<br><br>CONCLUSION: Patients in the acute phase of neuromyelitis optica spectrum disorder (NMOSD) exhibited imbalances in their gut microbiota and a deficiency in short-chain fatty acids (SCFAs). Following drug treatment, the composition of intestinal microbes in NMOSD patients during the remission phase closely resembled that of the healthy control population. The FMT experiment provided evidence of the significant association between intestinal flora and the pathogenesis of NMOSD. Consequently, investigating gut microbiota and identifying novel microbial markers hold promise for the diagnosis and treatment of NMOSD patients.}, }
@article {pmid39418241, year = {2024}, author = {Song, C and Liu, F and Mei, Y and Cai, W and Cheng, K and Guo, D and Liu, Y and Shi, H and Duan, DD and Liu, Z}, title = {Integrated metagenomic and metabonomic mechanisms for the therapeutic effects of Duhuo Jisheng decoction on intervertebral disc degeneration.}, journal = {PloS one}, volume = {19}, number = {10}, pages = {e0310014}, pmid = {39418241}, issn = {1932-6203}, mesh = {Animals ; *Intervertebral Disc Degeneration/drug therapy/metabolism/microbiology ; *Drugs, Chinese Herbal/pharmacology/therapeutic use ; *Metabolomics/methods ; Rats ; *Gastrointestinal Microbiome/drug effects ; Male ; *Rats, Sprague-Dawley ; *Metagenomics/methods ; Metabolome/drug effects ; Feces/microbiology ; Disease Models, Animal ; }, abstract = {Intervertebral disc degeneration (IVDD) is a prevalent orthopedic condition with lower back pain as the predominant clinical presentation that challenges clinical treatment with few therapeutic options. Duhuo Jisheng Decoction (DHJSD) has been proven effective in the therapy of IVDD, but the precise underlying mechanisms remain not fully elucidated. The current study was designed to test our hypothesis that DHJSD may systematically correct the phenotypic disruption of the gut microbiota and changes in the serum metabolome linked to IVDD. Analysis of the active ingredients of DHJSD by ultra high performance liquid chromatography. An integrated metagenomic and metabonomic approach was used to analyze feces and blood samples from normal and IVDD rats. Compared to the control group, fiber ring pinning on the caudal 3 to caudal 5 segments of the rats caused IVDD and significantly altered the compositions of the intestinal microbiota and serum metabolites. Integrated analysis revealed commonly-altered metabolic pathways shared by both intestinal microbiota and serum metabolome of the IVDD rats. DHJSD inhibited the degenerative process and restored the compositions of the perturbed gut microbiota, particularly the relative abundance of commensal microbes of the Prevotellaceae family. DHJSD also corrected the altered metabolic pathways involved in the metabolism of glycine, serine, threonine, valine, the citric acid cycle, and biosynthesis of leucine and isoleucine. DHJSD inhibited the disc degeneration process by an integrated metagenomic and metabonomic mechanism to restore the microbiome profile and normalize the metabonomic pathways.}, }
@article {pmid39417540, year = {2024}, author = {Ginatt, AA and Berihu, M and Castel, E and Medina, S and Carmi, G and Faigenboim-Doron, A and Sharon, I and Tal, O and Droby, S and Somera, T and Mazzola, M and Eizenberg, H and Freilich, S}, title = {A metabolic modeling-based framework for predicting trophic dependencies in native rhizobiomes of crop plants.}, journal = {eLife}, volume = {13}, number = {}, pages = {}, pmid = {39417540}, issn = {2050-084X}, support = {US-5390-21//United States-Israel Binational Agricultural Research and Development Fund/ ; }, mesh = {*Rhizosphere ; *Malus/microbiology/metabolism ; *Microbiota ; Plant Roots/microbiology/metabolism ; Soil Microbiology ; Bacteria/metabolism/genetics/classification ; Crops, Agricultural/microbiology ; Metabolomics/methods ; Models, Biological ; }, abstract = {The exchange of metabolites (i.e., metabolic interactions) between bacteria in the rhizosphere determines various plant-associated functions. Systematically understanding the metabolic interactions in the rhizosphere, as well as in other types of microbial communities, would open the door to the optimization of specific predefined functions of interest, and therefore to the harnessing of the functionality of various types of microbiomes. However, mechanistic knowledge regarding the gathering and interpretation of these interactions is limited. Here, we present a framework utilizing genomics and constraint-based modeling approaches, aiming to interpret the hierarchical trophic interactions in the soil environment. 243 genome scale metabolic models of bacteria associated with a specific disease-suppressive vs disease-conducive apple rhizospheres were drafted based on genome-resolved metagenomes, comprising an in silico native microbial community. Iteratively simulating microbial community members' growth in a metabolomics-based apple root-like environment produced novel data on potential trophic successions, used to form a network of communal trophic dependencies. Network-based analyses have characterized interactions associated with beneficial vs non-beneficial microbiome functioning, pinpointing specific compounds and microbial species as potential disease supporting and suppressing agents. This framework provides a means for capturing trophic interactions and formulating a range of testable hypotheses regarding the metabolic capabilities of microbial communities within their natural environment. Essentially, it can be applied to different environments and biological landscapes, elucidating the conditions for the targeted manipulation of various microbiomes, and the execution of countless predefined functions.}, }
@article {pmid39415203, year = {2024}, author = {Tong, X and Luo, D and Leung, MHY and Lee, JYY and Shen, Z and Jiang, W and Mason, CE and Lee, PKH}, title = {Diverse and specialized metabolic capabilities of microbes in oligotrophic built environments.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {198}, pmid = {39415203}, issn = {2049-2618}, support = {BK20230230//Jiangsu Science and Technology Programme/ ; 11214721//Hong Kong Research Grants Council, General Research Fund/ ; R1016-20F//Hong Kong Research Grants Council, Research Impact Fund/ ; }, mesh = {Humans ; Hong Kong ; *Microbiota ; *Built Environment ; *Metagenome ; *Phylogeny ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Skin/microbiology ; Micrococcus luteus/genetics/metabolism ; Genome, Bacterial ; }, abstract = {BACKGROUND: Built environments (BEs) are typically considered to be oligotrophic and harsh environments for microbial communities under normal, non-damp conditions. However, the metabolic functions of microbial inhabitants in BEs remain poorly understood. This study aimed to shed light on the functional capabilities of microbes in BEs by analyzing 860 representative metagenome-assembled genomes (rMAGs) reconstructed from 738 samples collected from BEs across the city of Hong Kong and from the skin surfaces of human occupants. The study specifically focused on the metabolic functions of rMAGs that are either phylogenetically novel or prevalent in BEs.<br><br>RESULTS: The diversity and composition of BE microbiomes were primarily shaped by the sample type, with Micrococcus luteus and Cutibacterium acnes being prevalent. The metabolic functions of rMAGs varied significantly based on taxonomy, even at the strain level. A novel strain affiliated with the Candidatus class Xenobia in the Candidatus phylum Eremiobacterota and two novel strains affiliated with the superphylum Patescibacteria exhibited unique functions compared with their close relatives, potentially aiding their survival in BEs and on human skins. The novel strains in the class Xenobia possessed genes for transporting nitrate and nitrite as nitrogen sources and nitrosative stress mitigation induced by nitric oxide during denitrification. The two novel Patescibacteria strains both possessed a broad array of genes for amino acid and trace element transport, while one of them carried genes for carotenoid and ubiquinone biosynthesis. The globally prevalent M. luteus in BEs displayed a large and open pangenome, with high infraspecific genomic diversity contributed by 11 conspecific strains recovered from BEs in a single geographic region. The versatile metabolic functions encoded in the large accessory genomes of M. luteus may contribute to its global ubiquity and specialization in BEs.<br><br>CONCLUSIONS: This study illustrates that the microbial inhabitants of BEs possess metabolic potentials that enable them to tolerate and counter different biotic and abiotic conditions. Additionally, these microbes can efficiently utilize various limited residual resources from occupant activities, potentially enhancing their survival and persistence within BEs. A better understanding of the metabolic functions of BE microbes will ultimately facilitate the development of strategies to create a healthy indoor microbiome. Video Abstract.}, }
@article {pmid39414630, year = {2024}, author = {Córdoba-Agudelo, M and Arboleda-Rivera, JC and Borrego-Muñoz, DA and Ramírez-Cuartas, CA and Pérez-Jaramillo, JE}, title = {Key Chemical Soil Parameters for the Assembly of Rhizosphere Bacteria Associated with Avocado Cv Hass Grafted on Landrace Rootstocks.}, journal = {Current microbiology}, volume = {81}, number = {12}, pages = {412}, pmid = {39414630}, issn = {1432-0991}, mesh = {*Persea/microbiology ; *Rhizosphere ; *Soil Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Soil/chemistry ; *Microbiota ; *RNA, Ribosomal, 16S/genetics ; *Plant Roots/microbiology ; Colombia ; Phylogeny ; }, abstract = {Avocado cultivation holds significant economic importance in many countries, ranking Colombia as the fifth largest global producer. Particularly, the Hass cultivar plays a pivotal role in Colombia's avocado industry, especially in the Department of Antioquia, the primary export region. This cultivar is grown under diverse soil and climate conditions and exhibits considerable genetic polymorphism due to the hybridization of varieties of agronomic significance, leading to a diverse array of landrace rootstocks. However, the role of soil conditions and rootstock genotype in structuring rhizosphere bacterial communities is still lacking. In addressing this knowledge gap, we investigated the influence of two soil conditions on the structure of rhizosphere bacterial communities associated with two landrace genotypes of Persea americana cv. Hass, utilizing 16S rRNA sequencing. Notably, no significant differences related to genotypes were observed. This study reports that the rhizosphere bacterial microbiome remains consistent across avocado landrace rootstocks, while variations in key parameters such as phosphorus, pH, Mg, and Ca drive distinct rhizosphere effects. Our results reveal that despite the soils having similar management, increases in these crucial parameters can lead to bacterial communities with lower alpha diversity and a more complex co-occurrence network. In addition, we found substantial variations in beta diversity, bacterial composition, and metagenome predictions between the two farms, underscoring the role of soil variables in shaping the bacterial microbiome. These findings provide valuable insights into the factors influencing the bacterial communities that may play a role in the health and productivity of crops with agro-industrial potential, such as Hass avocado.}, }
@article {pmid39413681, year = {2025}, author = {Wu, X and Qin, L and Song, M and Zhang, C and Guo, J and Yang, Z and Gao, Z and Qiu, M}, title = {Metagenomics combined with untargeted metabolomics to study the mechanism of miRNA-150-5p on SiO2 -induced acute lung injury.}, journal = {Journal of pharmaceutical and biomedical analysis}, volume = {252}, number = {}, pages = {116515}, doi = {10.1016/j.jpba.2024.116515}, pmid = {39413681}, issn = {1873-264X}, mesh = {Animals ; *Acute Lung Injury/chemically induced/metabolism ; Mice ; *Metabolomics/methods ; *Metagenomics/methods ; *MicroRNAs ; *Silicon Dioxide ; *Gastrointestinal Microbiome/drug effects ; Male ; Disease Models, Animal ; }, abstract = {Acute lung injury is a significant global health issue, and its treatment is becoming a hot topic of the researchers. To investigate the feasibility of miRNA-150-5p tail vein injection in the treatment of SiO2-induced acute lung injury through the regulation of gut microbiota and serum metabolites based on multiomics technology. Twenty-four mice were randomly divided into the control, SiO2 and miRNA-150-5p intervention groups. The SiO2 and miRNA-150-5p intervention groups received a single intranasal dose of 100 µL 4 % SiO2 suspension. Meanwhile, the miRNA-150-5p intervention group was administered with two tail vein injections of miRNA-150-5p (15 nmol each per mouse) on the day of successful modelling and on the third day post modelling. Metagenomics and metabolomics techniques were used to measure gut microbiota and serum metabolites, respectively. Tail vein injection of miRNA-150-5p improved SiO2-induced acute lung injury and reduced the secretion of inflammatory factors interleukin (IL)-6, tumour necrosis factor-α and IL-1β. These conditions altered the structure of gut microbiota, which resulted in the notable modulation of eight species at the species level. In addition, tail vein injection of miRNA-150-5p considerably reduced the levels of substances, such as phosphatidylethanolamine, phosphatidylcholine and phosphatidylinositol, in the glycerophospholipid metabolism and glycosylphosphatidylinositol-anchor biosynthesis pathways. Tail vein injection of miRNA-150-5p can alleviate acute lung injury. Combined metagenomics and untargeted metabolomics revealed the miRNA-150-5p-mitigated SiO2-induced acute lung injury that occurred through the regulation of gut microbiota and serum metabolites.}, }
@article {pmid39413245, year = {2024}, author = {Wang, L and Yin, Z and Yan, W and Hao, J and Tian, F and Shi, J}, title = {Nitrate-dependent antimony oxidase in an uncultured Symbiobacteriaceae member.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39413245}, issn = {1751-7370}, support = {2023YFC3710004//National Key Research and Development Program of China/ ; 22276206//National Natural Science Foundation of China/ ; }, mesh = {*Antimony/metabolism ; *Nitrates/metabolism ; *Oxidation-Reduction ; *Oxidoreductases/metabolism/genetics ; *RNA, Ribosomal, 16S/genetics ; Phylogeny ; Metagenomics ; Rhodopseudomonas/enzymology/genetics/metabolism ; Microbiota ; }, abstract = {Autotrophic antimony (Sb) oxidation coupled to nitrate reduction plays an important role in the transformation and detoxification of Sb. However, the specific oxidase involved in this process has yet to be identified. Herein, we enriched the microbiota capable of nitrate-dependent Sb(III) oxidation and identified a new Sb(III) oxidase in an uncultured member of Symbiobacteriaceae. Incubation experiments demonstrated that nitrate-dependent Sb(III) oxidation occurred in the microcosm supplemented with Sb(III) and nitrate. Both the 16S rRNA gene and metagenomic analyses indicated that a species within Symbiobacteriaceae played a crucial role in this process. Furthermore, carbon-13 isotope labeling with carbon dioxide-fixing Rhodopseudomonas palustris in combination with nanoscale secondary ion mass spectrometry revealed that a newly characterized oxidase from the dimethylsulfoxide reductase family, designated as NaoABC, was responsible for autotrophic Sb(III) oxidation coupled with nitrate reduction. The NaoABC complex functions in conjunction with the nitrate reductase NarGHI, forming a redox loop that transfers electrons from Sb(III) to nitrate, thereby generating the energy necessary for autotrophic growth. This research offers new insights into the understanding of how microbes link Sb and nitrogen biogeochemical cycles in the environment.}, }
@article {pmid39410870, year = {2025}, author = {Matsubara, K and Li, J and Enomoto, Y and Takahashi, T and Ma, M and Ninomiya, R and Kazami, D and Miura, K and Hirayama, K}, title = {Beneficial Role of Heat-Treated Lactobacillus sakei HS-1 on Growth Performance, Nutritional Status and Gut Microbiota in Weaned Piglets.}, journal = {Journal of animal physiology and animal nutrition}, volume = {109}, number = {2}, pages = {362-375}, pmid = {39410870}, issn = {1439-0396}, support = {//The authors received no specific funding for this work./ ; }, mesh = {Animals ; Swine/growth &amp; development/microbiology/physiology ; Animal Nutritional Physiological Phenomena ; Animal Feed/analysis ; *Gastrointestinal Microbiome ; Diet/veterinary ; Weaning ; *Latilactobacillus sakei/physiology ; *Hot Temperature ; *Probiotics/pharmacology ; Nutritional Status ; Male ; }, abstract = {In the swine industry, there is a strong need to replace an antibiotic growth promoter (AGP) used as feed additives in weaned piglets to enhance nutrient utilization in their diets and improve growth performance. Lactobacillus sakei HS-1 strain is a microbial preparation isolated from pickles. The study aim is to investigate the effectiveness of heat-treated L. sakei HS-1 strain (HT-LS) as a growth promoter in weaned piglets compared to colistin (CS), a widely used AGP. Eighteen crossbred weaned piglets (Landrace × Yorkshire × Duroc) of 21 days (average body weight [BW]: 7.06 ± 0.59 kg) were divided into three groups: fed the control diet (CT group), fed a diet supplemented with 30 ppm colistin sulphate (CS group), fed a diet supplemented with HT-LS at a concentration of 2.0 × 10[5] cells/g (LS group) until 49 days. The results indicated that LS group exhibited significantly higher average daily gain (p < 0.05) and higher BW (p < 0.1) compared with CT group, even higher than CS group. CS group showed higher growth performance compared to CT group but the differences were not statistically significant. In addition, LS group had higher (p < 0.05) or tended to higher (p < 0.1) concentrations of several plasma amino acids than the other two groups at 35 and 49 days. Faecal acetate concentration was higher (p < 0.1) in LS group than in CT group at 35 days. Blood immunoglobulin G concentration in LS group was significantly lower (p < 0.05) than in CT group at 35 and 49 days, and blood immunoglobulin A tended to be lower (p < 0.1) at 35 days than in CT group. LS group showed an increased abundance of g_Prevotella 7, g_Streptococcus and g_Lactobacillus (linear discriminant analysis [LDA] score ≥ 2.0). Predictive metagenomic analysis revealed an enrichment of the mixed acid fermentation pathway (LDA score ≥ 2.0). Furthermore, several gut microbes exhibited correlations with plasma amino acids (p < 0.01) and short-chain fatty acids in faeces (p < 0.01). These findings demonstrate that HT-LS improves the growth performance of weaned piglets by enhancing the efficient utilization of nutrients through gut microbiota modification.}, }
@article {pmid39409167, year = {2024}, author = {Evseev, P and Gutnik, D and Evpak, A and Kasimova, A and Miroshnikov, K}, title = {Origin, Evolution and Diversity of φ29-like Phages-Review and Bioinformatic Analysis.}, journal = {International journal of molecular sciences}, volume = {25}, number = {19}, pages = {}, pmid = {39409167}, issn = {1422-0067}, mesh = {*Bacteriophages/genetics/classification ; *Computational Biology/methods ; *Genome, Viral ; Evolution, Molecular ; Phylogeny ; Archaea/virology/genetics ; Capsid Proteins/genetics ; }, abstract = {Phage φ29 and related bacteriophages are currently the smallest known tailed viruses infecting various representatives of both Gram-positive and Gram-negative bacteria. They are characterised by genomic content features and distinctive properties that are unique among known tailed phages; their characteristics include protein primer-driven replication and a packaging process characteristic of this group. Searches conducted using public genomic databases revealed in excess of 2000 entries, including bacteriophages, phage plasmids and sequences identified as being archaeal that share the characteristic features of phage φ29. An analysis of predicted proteins, however, indicated that the metagenomic sequences attributed as archaeal appear to be misclassified and belong to bacteriophages. An analysis of the translated polypeptides of major capsid proteins (MCPs) of φ29-related phages indicated the dissimilarity of MCP sequences to those of almost all other known Caudoviricetes groups and a possible distant relationship to MCPs of T7-like (Autographiviridae) phages. Sequence searches conducted using HMM revealed the relatedness between the main structural proteins of φ29-like phages and an unusual lactococcal phage, KSY1 (Chopinvirus KSY1), whose genome contains two genes of RNA polymerase that are similar to the RNA polymerases of phages of the Autographiviridae and Schitoviridae (N4-like) families. An analysis of the tail tube proteins of φ29-like phages indicated their dissimilarity of the lower collar protein to tail proteins of all other viral groups, but revealed its possible distant relatedness with proteins of toxin translocation complexes. The combination of the unique features and distinctive origin of φ29-related phages suggests the categorisation of this vast group in a new order or as a new taxon of a higher rank.}, }
@article {pmid39409144, year = {2024}, author = {Donchev, D and Stoikov, I and Diukendjieva, A and Ivanov, IN}, title = {Assessment of Skimmed Milk Flocculation for Bacterial Enrichment from Water Samples, and Benchmarking of DNA Extraction and 16S rRNA Databases for Metagenomics.}, journal = {International journal of molecular sciences}, volume = {25}, number = {19}, pages = {}, pmid = {39409144}, issn = {1422-0067}, support = {BG05M2OP001-1.002-0001-C04//European Regional Development Fund through the Operational Program Science and Education for Smart Growth 2014-2020/ ; not applicable//Biocampus Sofia Association/ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Milk/microbiology ; *Metagenomics/methods ; Animals ; *DNA, Bacterial/genetics/isolation &amp; purification ; *Bacteria/genetics/classification/isolation &amp; purification ; Flocculation ; Microbiota/genetics ; Water Microbiology ; }, abstract = {Water samples for bacterial microbiome studies undergo biomass concentration, DNA extraction, and taxonomic identification steps. Through benchmarking, we studied the applicability of skimmed milk flocculation (SMF) for bacterial enrichment, an adapted in-house DNA extraction protocol, and six 16S rRNA databases (16S-DBs). Surface water samples from two rivers were treated with SMF and vacuum filtration (VF) and subjected to amplicon or shotgun metagenomics. A microbial community standard underwent five DNA extraction protocols, taxonomical identification with six different 16S-DBs, and evaluation by the Measurement Integrity Quotient (MIQ) score. In SMF samples, the skimmed milk was metabolized by members of lactic acid bacteria or genera such as Polaromonas, Macrococcus, and Agitococcus, resulting in increased relative abundance (p < 0.5) up to 5.0 log fold change compared to VF, rendering SMF inapplicable for bacterial microbiome studies. The best-performing DNA extraction protocols were FastSpin Soil, the in-house method, and EurX. All 16S-DBs yielded comparable MIQ scores within each DNA extraction kit, ranging from 61-66 (ZymoBIOMICs) up to 80-82 (FastSpin). DNA extraction kits exert more bias toward the composition than 16S-DBs. This benchmarking study provided valuable information to inform future water metagenomic study designs.}, }
@article {pmid39408280, year = {2024}, author = {Nguyen, SM and Tran, TDC and Tran, TM and Wang, C and Wu, J and Cai, Q and Ye, F and Shu, XO}, title = {Influence of Peanut Consumption on the Gut Microbiome: A Randomized Clinical Trial.}, journal = {Nutrients}, volume = {16}, number = {19}, pages = {}, pmid = {39408280}, issn = {2072-6643}, support = {N/A//The Peanut Institute/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Arachis ; Male ; Female ; *Feces/microbiology ; Adult ; Bacteria/classification/genetics ; Vietnam ; Diet ; Middle Aged ; }, abstract = {Background: Peanut consumption could impact cardiometabolic health through gut microbiota, a hypothesis that remains to be investigated. A randomized clinical trial in Vietnam evaluated whether peanut consumption alters gut microbiome communities. Methods: One hundred individuals were included and randomly assigned to the peanut intervention and control groups. A total of 51 participants were provided with and asked to consume 50 g of peanuts daily, while 49 controls maintained their usual dietary intake for 16 weeks. Stool samples were collected before and on the last day of the trial. After excluding 22 non-compliant participants and those who received antibiotic treatment, 35 participants from the intervention and 43 from the control were included in the analysis. Gut microbiota composition was measured by shotgun metagenomic sequencing. Associations of changes in gut microbial diversity with peanut intervention were evaluated via linear regression analysis. Linear mixed-effects models were used to analyze associations of composition, sub-community structure, and microbial metabolic pathways with peanut intervention. We also performed beta regression analysis to examine the impact of peanut intervention on the overall and individual stability of microbial taxa and metabolic pathways. All associations with false discovery rate (FDR)-corrected p-values of <0.1 were considered statistically significant. Results: No significant changes were found in α- and β-diversities and overall gut microbial stability after peanut intervention. However, the peanut intervention led to lower enrichment of five phyla, five classes, two orders, twenty-four metabolic pathways, and six species-level sub-communities, with a dominant representation of Bifidobacterium pseudocatenulatum, Escherichia coli D, Holdemanella biformis, Ruminococcus D bicirculans, Roseburia inulinivorans, and MGYG-HGUT-00200 (p < 0.05 and FDR < 0.1). The peanut intervention led to the short-term stability of several species, such as Faecalibacterium prausnitzii F and H, and a metabolic pathway involved in nitrate reduction V (p < 0.05; FDR < 0.1), known for their potential roles in human health, especially cardiovascular health. Conclusions: In summary, a 16-week peanut intervention led to significant changes in gut microbial composition, species-level sub-communities, and the short-term stability of several bacteria, but not overall gut microbial diversity and stability. Further research with a larger sample size and a longer intervention period is needed to confirm these findings and investigate the direct impact of gut-microbiome-mediated health effects of peanut consumption. Trial registration: The International Traditional Medicine Clinical Trial Registry (ITMCTR). Registration number: ITMCTR2024000050. Retrospectively Registered 24 April 2024.}, }
@article {pmid39407346, year = {2024}, author = {Barcenilla, C and Cobo-Díaz, JF and Puente, A and Valentino, V and De Filippis, F and Ercolini, D and Carlino, N and Pinto, F and Segata, N and Prieto, M and López, M and Alvarez-Ordóñez, A}, title = {In-depth characterization of food and environmental microbiomes across different meat processing plants.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {199}, pmid = {39407346}, issn = {2049-2618}, support = {BOCYL-D-07072020-6//Junta de Castilla y Le&#xf3;n and the European Social Fund/ ; PRE2021-098910//Ministerio de Ciencia e Innovaci&#xf3;n, Spain/ ; }, mesh = {*Microbiota ; *Food Microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Meat Products/microbiology ; *Food Handling ; Environmental Microbiology ; Meat/microbiology ; RNA, Ribosomal, 16S/genetics ; Animals ; Phylogeny ; }, abstract = {BACKGROUND: Processing environments can be an important source of pathogenic and spoilage microorganisms that cross contaminate meat and meat products. The aim of this study was to characterize the microbiome of raw materials, processing environments and end products from 19 facilities producing different meat products.<br><br>RESULTS: The taxonomic profiles of the microbial communities evolved along processing, from raw materials to end products, suggesting that food contact (FC) surfaces play an important role in modulating the microbiome of final products. Some species persisted with the highest relative abundance in raw materials, food processing environments and/or in the final product, including species from the genera Pseudomonas, Staphylococcus, Brochothrix, Acinetobacter and Psychrobacter. Processing environments showed a very diverse core microbiota, partially shared with the products. Pseudomonas fragi and Pseudomonas sp. Lz4W (in all sample and facility types) and Brochothrix thermosphacta, Psychrobacter sp. and Psychrobacter sp. P11F6 (in raw materials, FC surfaces and end products) were prominent members of the core microbiota for all facilities, while Latilactobacillus sakei was found as a dominant species exclusively in end products from the facilities producing fermented sausages. Processing environments showed a higher amount of antimicrobial resistance genes and virulence factors than raw materials and end products. One thousand four hundred twenty-one medium/high-quality metagenome-assembled genomes (MAGs) were reconstructed. Of these, 274 high-quality MAGs (completeness&#x2009;>&#x2009;90%) corresponded to 210 putative new species, mostly found in processing environments. For two relevant taxa in meat curing and fermentation processes (S. equorum and L. sakei, respectively), phylogenetic variation was observed associated with the specific processing facility under study, which suggests that specific strains of these taxa may be selected in different meat processing plants, likely contributing to the peculiar sensorial traits of the end products produced in them.<br><br>CONCLUSIONS: Overall, our findings provide the most detailed metagenomics-based perspective up to now of the microbes that thrive in meat, meat products and associated environments and open avenues for future research activities to better understand the microbiome functionality and potential contribution to meat quality and safety. Video Abstract.}, }
@article {pmid39407345, year = {2024}, author = {Salgado, JFM and Hervé, V and Vera, MAG and Tokuda, G and Brune, A}, title = {Unveiling lignocellulolytic potential: a genomic exploration of bacterial lineages within the termite gut.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {201}, pmid = {39407345}, issn = {2049-2618}, mesh = {Animals ; *Isoptera/microbiology ; *Lignin/metabolism ; *Gastrointestinal Microbiome ; Phylogeny ; Bacteria/genetics/classification/isolation &amp; purification/enzymology ; Metagenome ; Polysaccharides/metabolism ; Genome, Bacterial ; Genomics ; Cellulose/metabolism ; }, abstract = {BACKGROUND: The microbial landscape within termite guts varies across termite families. The gut microbiota of lower termites (LT) is dominated by cellulolytic flagellates that sequester wood particles in their digestive vacuoles, whereas in the flagellate-free higher termites (HT), cellulolytic activity has been attributed to fiber-associated bacteria. However, little is known about the role of individual lineages in fiber digestion, particularly in LT.<br><br>RESULTS: We investigated the lignocellulolytic potential of 2223 metagenome-assembled genomes (MAGs) recovered from the gut metagenomes of 51 termite species. In the flagellate-dependent LT, cellulolytic enzymes are restricted to MAGs of Bacteroidota (Dysgonomonadaceae, Tannerellaceae, Bacteroidaceae, Azobacteroidaceae) and Spirochaetota (Breznakiellaceae) and reflect a specialization on cellodextrins, whereas their hemicellulolytic arsenal features activities on xylans and diverse heteropolymers. By contrast, the MAGs derived from flagellate-free HT possess a comprehensive arsenal of exo- and endoglucanases that resembles that of termite gut flagellates, underlining that Fibrobacterota and Spirochaetota occupy the cellulolytic niche that became vacant after the loss of the flagellates. Furthermore, we detected directly or indirectly oxygen-dependent enzymes that oxidize cellulose or modify lignin in MAGs of Pseudomonadota (Burkholderiales, Pseudomonadales) and Actinomycetota (Actinomycetales, Mycobacteriales), representing lineages located at the hindgut wall.<br><br>CONCLUSIONS: The results of this study refine our concept of symbiotic digestion of lignocellulose in termite guts, emphasizing the differential roles of specific bacterial lineages in both flagellate-dependent and flagellate-independent breakdown of cellulose and hemicelluloses, as well as a so far unappreciated role of oxygen in the depolymerization of plant fiber and lignin in the microoxic periphery during gut passage in HT. Video Abstract.}, }
@article {pmid39406897, year = {2024}, author = {Westmeijer, G and van Dam, F and Kietäväinen, R and González-Rosales, C and Bertilsson, S and Drake, H and Dopson, M}, title = {Candidatus Desulforudis audaxviator dominates a 975 m deep groundwater community in central Sweden.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1332}, pmid = {39406897}, issn = {2399-3642}, support = {2018-04311//Vetenskapsr&#xe5;det (Swedish Research Council)/ ; }, mesh = {*Groundwater/microbiology ; Sweden ; Microbiota/genetics ; Metagenome ; Phylogeny ; Deltaproteobacteria/genetics/classification/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The continental bedrock contains groundwater-bearing fractures that are home to microbial populations that are vital in mediating the Earth's biogeochemical cycles. However, their diversity is poorly understood due to the difficulty of obtaining samples from this environment. Here, a groundwater-bearing fracture at 975 m depth was isolated by employing packers in order to characterize the microbial community via metagenomes combined with prokaryotic and eukaryotic marker genes (16S and 18S ribosomal RNA gene). Genome-resolved analyses revealed a community dominated by sulfate-reducing Bacillota, predominantly represented by Candidatus Desulforudis audaxviator and with Wood-Ljungdahl as the most prevalent pathway for inorganic carbon fixation. Moreover, the eukaryotic community had a considerable diversity and was comprised of mainly flatworms, chlorophytes, crustaceans, ochrophytes, and fungi. These findings support the important role of the Bacillota, with the sulfate reducer Candidatus Desulforudis audaxviator as its main representative, as primary producers in the often energy-limited groundwaters of the continental subsurface.}, }
@article {pmid39406574, year = {2025}, author = {Steinberg, R and Moeller, A and Gisler, A and Mostacci, N and Hilty, M and Usemann, J}, title = {Longitudinal effects of elexacaftor/tezacaftor/ivacaftor on the oropharyngeal metagenome in adolescents with cystic fibrosis.}, journal = {Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society}, volume = {24}, number = {3}, pages = {562-570}, doi = {10.1016/j.jcf.2024.10.001}, pmid = {39406574}, issn = {1873-5010}, mesh = {Humans ; *Cystic Fibrosis/drug therapy/microbiology/physiopathology ; Adolescent ; *Aminophenols/therapeutic use/administration &amp; dosage ; Male ; Female ; *Quinolones/therapeutic use/administration &amp; dosage ; Drug Combinations ; *Oropharynx/microbiology ; *Benzodioxoles/therapeutic use/administration &amp; dosage ; *Indoles/therapeutic use/administration &amp; dosage ; Child ; Prospective Studies ; *Metagenome/drug effects ; Longitudinal Studies ; Chloride Channel Agonists/administration &amp; dosage ; Young Adult ; *Pyridines/therapeutic use ; *Pyrrolidines/therapeutic use ; *Pyrazoles/therapeutic use/administration &amp; dosage ; Microbiota/drug effects ; Oxadiazoles/therapeutic use ; }, abstract = {BACKGROUND: Triple modulator therapy elexacaftor/tezacaftor/ivacaftor (ETI) improves lung function and impacts upon the respiratory microbiome in people with Cystic fibrosis (pwCF) with advanced lung disease. However, adolescents with cystic fibrosis (CF) are less colonized with bacterial pathogens than adult pwCF but their microbiota already differs from healthy individuals. The aim of this study was to longitudinally analyze the impact of ETI on the respiratory metagenome in adolescents with predominantly mild CF lung disease.<br><br>METHODS: In this prospective observational study, we included pwCF aged 12-20 years with at least one F508del mutation, who collected oropharyngeal swabs before and after initiation of ETI therapy twice per week to biweekly over three months. We performed whole metagenome shotgun sequencing, followed by host DNA filtering and taxonomic profiling. We used linear and additive mixed effects models adjusted for known confounders and corrected for multiple testing to study longitudinal development of the microbiome. We analyzed bacterial diversity, abundance, and strain-level phylogeny.<br><br>RESULTS: We analyzed the metagenomic data of 297 swabs of 20 pwCF. Microbiome composition changed after initiation of ETI therapy. We observed a slight diversification of the microbiome over time (Inv Simpson, Coef 0.085, 95 %CI 0.003, 0.17, p = 0.04). Strain-level analysis and clustering showed that strain retention of the most frequent bacterial species is predominant even during ETI therapy.<br><br>CONCLUSIONS: During three months of ETI therapy, commensal bacteria increased, which may help to prevent overgrowth of bacterial pathogens.}, }
@article {pmid39405686, year = {2024}, author = {Zhang, S and Hou, R and Wang, Y and Huang, Q and Lin, L and Li, H and Liu, S and Jiang, Z and Huang, X and Xu, X}, title = {Xenobiotic metabolism activity of gut microbiota from six marine species: Combined taxonomic, metagenomic, and in vitro transformation analysis.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {136152}, doi = {10.1016/j.jhazmat.2024.136152}, pmid = {39405686}, issn = {1873-3336}, mesh = {Animals ; *Xenobiotics/metabolism/toxicity ; *Gastrointestinal Microbiome/drug effects ; *Bacteria/genetics/metabolism/classification ; Water Pollutants, Chemical/metabolism/toxicity ; RNA, Ribosomal, 16S/genetics ; Fishes/microbiology/metabolism ; Metagenomics ; Bivalvia/microbiology/metabolism ; Biotransformation ; }, abstract = {The xenobiotic metabolism driven by the gut microbiota significantly regulates the bioavailability and toxic effects of environmental pollutants such as plasticizers on aquatic organisms. However, it is still unknown whether the gut microbiota can exhibit variable metabolic ability across host species and which functional bacteria and genes are involved in xenobiotic transformation. This study investigated the enriched gut microbiota community composition and diversity of in vitro enrichment cultures from 6 marine species, namely, yellowfin seabream (Acanthopagrus latus), thorn fish (Terapon jarbua), shortnose ponyfish (Leiognathus brevirostris), mussel (Perna viridis), prawn (Parapenaeopsis hungerfordi) and crab (Charybdis riversandersoni). Pseudomonadota, Bacteroidota and Bacillota were the dominant phyla and Enterobacter, Raoultella, Klebsiella, Dysgonomanas and Lactococcus were the dominant genera in the enriched flora according to 16S rRNA sequencing. Furthermore, the metagenomic results revealed that all enriched gut microbiota presented metabolic genes for carbohydrates, amino acids, lipids, and xenobiotics. In particular, the gut microbiota of yellowfin seabream had the highest abundance of glycoside hydrolase family genes and CYP450 enzyme genes. Klebsiella was identified as a common potential degrader of xenobiotic metabolism. In addition, the Biolog plate test system confirmed that the gut microbiota can metabolize various carbon sources and drive the xenobiotic transformation. According to AWCD analysis of community level physiological profiling (CLPP), yellowfin seabream > mussel > prawn > shortnose ponyfish > crab > thorn fish. The gut microbiota of yellowfin seabream presented a stronger metabolic profile of phthalates and bisphenol analogs which reflected by their AWCD results and concentration variations. Overall, our results demonstrated the diverse metabolic abilities of the gut microbiota from six marine organisms and their potential for altering of the fate of xenobiotics in the ecosystem on the basis of combined taxonomic, metagenomic, and in vitro transformation analysis.}, }
@article {pmid39405675, year = {2024}, author = {Xing, BS and Su, YM and Fu, YL and Wu, YF and Yan, CH and Wang, XC and Li, YY and Chen, R}, title = {Comparison of the short- and long-term effects of zinc ions on the anaerobic mesophilic co-digestion of food waste and waste activated sludge: Digester performance, antibiotic resistance gene reduction and the microbial community.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {136119}, doi = {10.1016/j.jhazmat.2024.136119}, pmid = {39405675}, issn = {1873-3336}, mesh = {*Zinc ; *Sewage/microbiology ; Anaerobiosis ; *Bioreactors ; *Methane/metabolism ; *Drug Resistance, Microbial/genetics ; *Microbiota/drug effects ; Food ; Waste Disposal, Fluid/methods ; Food Loss and Waste ; }, abstract = {Heavy metals contained in waste activated sludge (WAS), especially zinc ions, have an inhibitory effect on the anaerobic digestion. However, the effects of zinc ions on digester performance, antibiotic resistance genes (ARGs) reduction, and the microbial community involved in the anaerobic mesophilic co-digestion (AcoD) of WAS and food waste (FW) have not been fully characterized. Therefore, batch trials and continuous stirred tank reactors were used under different zinc-ion concentrations. Findings showed that the AcoD system can tolerate a maximum zinc ion of 540 mg/L in a short-term batch and 470 mg/L in a long-term AcoD system, promoting methane production of approximately 1.0-17.0 %. Metagenomic analysis revealed that syntrophic H2 transfer occurred between Syntrophomonas and Methanoculleus and the aceticlastic and hydrogenotrophic methanogenic pathways were both enhanced by 1.18- and 1.16 times, respectively. Moreover, the relative abundance of Methanosarcina increased from 58.4 % to 72.5 % at 470 mg/L to adapt to the high zinc ion concentration during long-term continuous operation. These results revealed that AcoD with a low zinc ion concentration can effectively increase the removal percentage of ARGs. The results provide guidance for biogas recovery and use of mesophilic AcoD with FW and WAS containing high zinc ion concentrations without pretreatment process.}, }
@article {pmid39404262, year = {2024}, author = {Zhong, C and Yamanouchi, S and Li, Y and Chen, J and Wei, T and Wang, R and Zhou, K and Cheng, A and Hao, W and Liu, H and Konhauser, KO and Iwasaki, W and Qian, P-Y}, title = {Marine biofilms: cyanobacteria factories for the global oceans.}, journal = {mSystems}, volume = {9}, number = {11}, pages = {e0031724}, pmid = {39404262}, issn = {2379-5077}, support = {2021HJ01, SMSEGL20SC01//Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ()/ ; JPMJCR19S2//MEXT | Japan Science and Technology Agency (JST)/ ; 19H05688, 18H04136//MEXT | Japan Society for the Promotion of Science (JSPS)/ ; HKUST PDFS2223-6S03//Research Grants Council, University Grants Committee ()/ ; }, mesh = {*Biofilms/growth &amp; development ; *Cyanobacteria/genetics/physiology/classification/isolation &amp; purification ; *Seawater/microbiology ; *Oceans and Seas ; Metagenome ; Phylogeny ; Metagenomics ; }, abstract = {UNLABELLED: Marine biofilms were newly revealed as a giant microbial diversity pool for global oceans. However, the cyanobacterial diversity in marine biofilms within the upper seawater column and its ecological and evolutionary implications remains undetermined. Here, we reconstructed a full picture of modern marine cyanobacteria habitats by re-analyzing 9.3 terabyte metagenomic data sets and 2,648 metagenome-assembled genomes (MAGs). The abundances of cyanobacteria lineages exclusively detected in marine biofilms were up to ninefold higher than those in seawater at similar sample size. Analyses revealed that cyanobacteria in marine biofilms are specialists with strong geographical and environmental constraints on their genome and functional adaption, which is in stark contrast to the generalistic features of seawater-derived cyanobacteria. Molecular dating suggests that the important diversifications in biofilm-forming cyanobacteria appear to coincide with the Great Oxidation Event (GOE), "boring billion" middle Proterozoic, and the Neoproterozoic Oxidation Event (NOE). These new insights suggest that marine biofilms are large and important cyanobacterial factories for the global oceans.<br><br>IMPORTANCE: Cyanobacteria, highly diverse microbial organisms, play a crucial role in Earth's oxygenation and biogeochemical cycling. However, their connection to these processes remains unclear, partly due to incomplete surveys of oceanic niches. Our study uncovered significant cyanobacterial diversity in marine biofilms, showing distinct niche differentiation compared to seawater counterparts. These patterns reflect three key stages of marine cyanobacterial diversification, coinciding with major geological events in the Earth's history.}, }
@article {pmid39402236, year = {2024}, author = {Vera-Ponce de León, A and Hensen, T and Hoetzinger, M and Gupta, S and Weston, B and Johnsen, SM and Rasmussen, JA and Clausen, CG and Pless, L and Veríssimo, ARA and Rudi, K and Snipen, L and Karlsen, CR and Limborg, MT and Bertilsson, S and Thiele, I and Hvidsten, TR and Sandve, SR and Pope, PB and La Rosa, SL}, title = {Genomic and functional characterization of the Atlantic salmon gut microbiome in relation to nutrition and health.}, journal = {Nature microbiology}, volume = {9}, number = {11}, pages = {3059-3074}, pmid = {39402236}, issn = {2058-5276}, support = {300846//Norges Forskningsr&#xe5;d (Research Council of Norway)/ ; 757922//EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)/ ; 12/RC/2273-P2//Science Foundation Ireland (SFI)/ ; }, mesh = {Animals ; *Salmo salar/microbiology ; *Gastrointestinal Microbiome/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; *Metagenomics ; *Aquaculture ; *Genome, Bacterial/genetics ; Seawater/microbiology ; Fresh Water/microbiology ; Phylogeny ; Genomics/methods ; }, abstract = {To ensure sustainable aquaculture, it is essential to understand the path 'from feed to fish', whereby the gut microbiome plays an important role in digestion and metabolism, ultimately influencing host health and growth. Previous work has reported the taxonomic composition of the Atlantic salmon (Salmo salar) gut microbiome; however, functional insights are lacking. Here we present the Salmon Microbial Genome Atlas consisting of 211 high-quality bacterial genomes, recovered by cultivation (n = 131) and gut metagenomics (n = 80) from wild and farmed fish both in freshwater and seawater. Bacterial genomes were taxonomically assigned to 14 different orders, including 35 distinctive genera and 29 previously undescribed species. Using metatranscriptomics, we functionally characterized key bacterial populations, across five phyla, in the salmon gut. This included the ability to degrade diet-derived fibres and release vitamins and other exometabolites with known beneficial effects, which was supported by genome-scale metabolic modelling and in vitro cultivation of selected bacterial species coupled with untargeted metabolomic studies. Together, the Salmon Microbial Genome Atlas provides a genomic and functional resource to enable future studies on salmon nutrition and health.}, }
@article {pmid39400741, year = {2024}, author = {Lemieux-Labonté, V and Pathmanathan, JS and Terrat, Y and Tromas, N and Simard, A and Haase, CG and Lausen, CL and Willis, CKR and Lapointe, FJ}, title = {Pseudogymnoascus destructans invasion stage impacts the skin microbial functions of highly vulnerable Myotis lucifugus.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {11}, pages = {}, pmid = {39400741}, issn = {1574-6941}, support = {RGPIN-2015-05219//Natural Sciences and Engineering Research Council of Canada/ ; }, mesh = {Animals ; *Chiroptera/microbiology ; *Skin/microbiology ; *Ascomycota/genetics/pathogenicity ; *Microbiota ; Hibernation ; Mycoses/microbiology/veterinary ; }, abstract = {The role of the skin microbiome in resistance and susceptibility of wildlife to fungal pathogens has been examined from a taxonomic perspective but skin microbial function, in the context of fungal infection, has yet to be studied. Our objective was to understand effects of a bat fungal pathogen site infection status and course of invasion on skin microbial function. We sampled seven hibernating colonies of Myotis lucifugus covering three-time points over the course of Pseudogymnoascus destructans (Pd) invasion and white nose syndrome (pre-invasion, epidemic, and established). Our results support three new hypotheses about Pd and skin functional microbiome: (1) there is an important effect of Pd invasion stage, especially at the epidemic stage; (2) disruption by the fungus at the epidemic stage could decrease anti-fungal functions with potential negative effects on the microbiome and bat health; (3) the collection site might have a larger influence on microbiomes at the pre-invasion stage rather than at epidemic and established stages. Future studies with larger sample sizes and using meta-omics approaches will help confirm these hypotheses, and determine the influence of the microbiome on wildlife survival to fungal disease.}, }
@article {pmid39399973, year = {2024}, author = {Simpson, A and Wood-Charlson, EM and Smith, M and Koch, BJ and Beilsmith, K and Kimbrel, JA and Kellom, M and Hunter, CI and Walls, RL and Schriml, LM and Wilhelm, RC}, title = {MISIP: a data standard for the reuse and reproducibility of any stable isotope probing-derived nucleic acid sequence and experiment.}, journal = {GigaScience}, volume = {13}, number = {}, pages = {}, pmid = {39399973}, issn = {2047-217X}, support = {IND90024429//USDA/ ; //Purdue University/ ; //Lawrence Berkeley National Laboratory/ ; }, mesh = {*Isotope Labeling/methods ; Reproducibility of Results ; Microbiota/genetics ; Metadata ; Metagenomics/methods ; Sequence Analysis, DNA/methods ; Metagenome ; }, abstract = {DNA/RNA-stable isotope probing (SIP) is a powerful tool to link in situ microbial activity to sequencing data. Every SIP dataset captures distinct information about microbial community metabolism, process rates, and population dynamics, offering valuable insights for a wide range of research questions. Data reuse maximizes the information derived from the labor and resource-intensive SIP approaches. Yet, a review of publicly available SIP sequencing metadata showed that critical information necessary for reproducibility and reuse was often missing. Here, we outline the Minimum Information for any Stable Isotope Probing Sequence (MISIP) according to the Minimum Information for any (x) Sequence (MIxS) framework and include examples of MISIP reporting for common SIP experiments. Our objectives are to expand the capacity of MIxS to accommodate SIP-specific metadata and guide SIP users in metadata collection when planning and reporting an experiment. The MISIP standard requires 5 metadata fields-isotope, isotopolog, isotopolog label, labeling approach, and gradient position-and recommends several fields that represent best practices in acquiring and reporting SIP sequencing data (e.g., gradient density and nucleic acid amount). The standard is intended to be used in concert with other MIxS checklists to comprehensively describe the origin of sequence data, such as for marker genes (MISIP-MIMARKS) or metagenomes (MISIP-MIMS), in combination with metadata required by an environmental extension (e.g., soil). The adoption of the proposed data standard will improve the reuse of any sequence derived from a SIP experiment and, by extension, deepen understanding of in situ biogeochemical processes and microbial ecology.}, }
@article {pmid39399231, year = {2024}, author = {Scicchitano, D and Foresto, L and Laczny, CC and Cinti, N and Vitagliano, R and Halder, R and Morri, G and Turroni, S and D'Amico, F and Palladino, G and Fiori, J and Wilmes, P and Rampelli, S and Candela, M}, title = {A 15-day pilot biodiversity intervention with horses in a farm system leads to gut microbiome rewilding in 10 urban Italian children.}, journal = {One health (Amsterdam, Netherlands)}, volume = {19}, number = {}, pages = {100902}, pmid = {39399231}, issn = {2352-7714}, abstract = {To provide some glimpses on the possibility of shaping the human gut microbiome (GM) through probiotic exchange with natural ecosystems, here we explored the impact of 15 days of daily interaction with horses on the GM of 10 urban-living Italian children. Specifically, the children were in close contact with the horses in an "educational farm", where they spent almost 10 h/day interacting with the animals. The children's GM was assessed before and after the horse interaction using metabarcoding sequencing and shotgun metagenomics, along with the horses' skin, oral and fecal microbiomes. Targeted metabolomic analysis for GM-produced beneficial metabolites (i.e., short-chain fatty acids) in the children's feces was also performed. Interaction with horses facilitated the acquisition of health-related traits in the children's GM, such as increased diversity, enhanced butyrate production and an increase in several health-promoting species considered to be next-generation probiotics. Among these, the butyrate producers Facecalibacterium prausnitzii and F. duncaniae and a species belonging to the order Christensenellales. Interaction with horses was also associated with increased proportions of Eggerthella lenta, Gordonibacter pamelae and G. urolithinfaciens, GM components known to play a role in the bioconversion of dietary plant polyphenols into beneficial metabolites. Notably, no increase in potentially harmful traits, including toxin genes, was observed. Overall, our pilot study provides some insights on the existence of possible health-promoting exchanges between children and horses microbiomes. It lays the groundwork for an implemented and more systematic enrollment effort to explore the full complexity of human GM rewilding through exchange with natural ecosystems, aligning with the One Health approach.}, }
@article {pmid39396785, year = {2024}, author = {Su, XS and Zhang, YB and Jin, WJ and Zhang, ZJ and Xie, ZK and Wang, RY and Wang, YJ and Qiu, Y}, title = {Lily viruses regulate the viral community of the Lanzhou lily rhizosphere and indirectly affect rhizosphere carbon and nitrogen cycling.}, journal = {The Science of the total environment}, volume = {955}, number = {}, pages = {176808}, doi = {10.1016/j.scitotenv.2024.176808}, pmid = {39396785}, issn = {1879-1026}, mesh = {*Rhizosphere ; *Soil Microbiology ; *Lilium/virology/microbiology ; *Nitrogen/metabolism ; Nitrogen Cycle ; Carbon/metabolism ; Plant Viruses/physiology ; Virome ; China ; Plant Roots/virology/microbiology/metabolism ; Soil/chemistry ; Carbon Cycle ; Metagenomics ; Cucumovirus/physiology ; }, abstract = {The rhizosphere, where plant roots interact intensely with the soil, is a crucial but understudied area in terms of the impact of virus infection. In this study, we investigated the effects of lily symptomless virus (LSV) and cucumber mosaic virus (CMV) on the Lanzhou lily (Lilium davidii var. unicolor) rhizosphere using metagenomics and bioinformatics analysis. We found that virus infection significantly altered soil pH, inorganic carbon, nitrate nitrogen, and total sulfur. Co-infection with LSV and CMV had a greater influence than single infections on the α- and β-diversity of the rhizosphere viral community in which the absolute abundance of certain virus families (Siphoviridae, Podoviridae, and Myoviridae) increased significantly, whereas bacteria, fungi, and archaea remained relatively unaffected. These altered virus populations influenced the rhizosphere microbial carbon and nitrogen cycles by exerting top-down control on bacteria. Co-infection potentially weakened rhizosphere carbon fixation and promoted processes such as methane oxidation, nitrification, and denitrification. In addition, the co-occurrence network of bacteria and viruses in the rhizosphere revealed substantial changes in microbial community composition under co-infection. Our partial-least-squares path model confirmed that the diversity of the rhizosphere viral community indirectly regulated the carbon and nitrogen cycling functions of the microbial community, thus affecting the accumulation of carbon and nitrogen nutrients in the soil. Our results are the first report of the effects of virus infection on the lily rhizosphere, particularly for co-infection; they therefore complement research on the plant virus pathogenic mechanisms, and increase our understanding of the ecological role of rhizosphere soil viruses.}, }
@article {pmid39396767, year = {2024}, author = {Zhao, F and Tie, N and Kwok, LY and Ma, T and Wang, J and Man, D and Yuan, X and Li, H and Pang, L and Shi, H and Ren, S and Yu, Z and Shen, X and Li, H and Zhang, H}, title = {Baseline gut microbiome as a predictive biomarker of response to probiotic adjuvant treatment in gout management.}, journal = {Pharmacological research}, volume = {209}, number = {}, pages = {107445}, doi = {10.1016/j.phrs.2024.107445}, pmid = {39396767}, issn = {1096-1186}, mesh = {Humans ; *Probiotics/therapeutic use/administration &amp; dosage ; *Gout/drug therapy/blood ; *Gastrointestinal Microbiome/drug effects ; Male ; Double-Blind Method ; Middle Aged ; *Uric Acid/blood ; Female ; *Biomarkers/blood ; Aged ; Gout Suppressants/therapeutic use ; Febuxostat/therapeutic use ; Adult ; Treatment Outcome ; Feces/microbiology ; }, abstract = {Gout is characterized by dysregulation of uric acid (UA) metabolism, and the gut microbiota may serve as a regulatory target. This two-month randomized, double-blind, placebo-controlled trial aimed to investigate the additional benefits of coadministering Probio-X alongside febuxostat. A total of 160 patients with gout were randomly assigned to either the probiotic group (n = 120; Probio-X [3 × 10[10] CFU/day] with febuxostat) or the placebo group (n = 40; placebo material with febuxostat). Coadministration of Probio-X significantly decreased serum UA levels and the rate of acute gout attacks (P < 0.05). Based on achieving a target sUA level (360 μmol/L) after the intervention, the probiotic group was further subdivided into probiotic-responsive (ProA; n = 54) and probiotic-unresponsive (ProB; n = 66) subgroups. Post-intervention clinical indicators, metagenomic, and metabolomic changes in the ProB and placebo groups were similar, but differed from those in the ProA group, which exhibited significantly lower levels of acute gout attack, gout impact score, serum indicators (UA, XOD, hypoxanthine, and IL-1β), and fecal gene abundances of UA-producing pathways (KEGG orthologs of K13479 and K01487; gut metabolic modules for formate conversion and lactose and galactose degradation). Additionally, the ProA group showed significantly higher levels (P < 0.05) of gut SCFAs-producing bacteria and UA-related metabolites (xanthine, hypoxanthine, bile acids) after the intervention. Finally, we established a gout metagenomic classifier to predict probiotic responsiveness based on subjects' baseline gut microbiota composition. Our results indicate that probiotic-driven therapeutic responses are highly individual, with the probiotic-responsive cohort benefitting significantly from probiotic coadministration.}, }
@article {pmid39395412, year = {2025}, author = {Talwar, C and Davuluri, GVN and Kamal, AHM and Coarfa, C and Han, SJ and Veeraragavan, S and Parsawar, K and Putluri, N and Hoffman, K and Jimenez, P and Biest, S and Kommagani, R}, title = {Identification of distinct stool metabolites in women with endometriosis for non-invasive diagnosis and potential for microbiota-based therapies.}, journal = {Med (New York, N.Y.)}, volume = {6}, number = {2}, pages = {100517}, pmid = {39395412}, issn = {2666-6340}, support = {R01 CA220297/CA/NCI NIH HHS/United States ; R01 HD104813/HD/NICHD NIH HHS/United States ; U54 HG006348/HG/NHGRI NIH HHS/United States ; R01 CA216426/CA/NCI NIH HHS/United States ; P50 HD103555/HD/NICHD NIH HHS/United States ; P30 ES030285/ES/NIEHS NIH HHS/United States ; R01 HD102680/HD/NICHD NIH HHS/United States ; P30 CA125123/CA/NCI NIH HHS/United States ; }, mesh = {Humans ; Female ; *Endometriosis/diagnosis/microbiology/metabolism/therapy ; *Feces/microbiology/chemistry ; Animals ; Mice ; *Gastrointestinal Microbiome ; Metabolomics ; Metabolome ; Indoles/metabolism ; Adult ; Fecal Microbiota Transplantation ; Disease Models, Animal ; }, abstract = {BACKGROUND: Endometriosis, a poorly studied gynecological condition, is characterized by the presence of ectopic endometrial lesions resulting in pelvic pain, inflammation, and infertility. These associated symptoms contribute to a significant burden, often exacerbated by delayed diagnosis. Current diagnostic methods involve invasive procedures, and existing treatments provide no cure.<br><br>METHODS: Microbiome-metabolome signatures in stool samples from individuals with and without endometriosis were determined using unbiased metabolomics and 16S bacteria sequencing. Functional studies for selected microbiota-derived metabolites were conducted in&#xa0;vitro using patient-derived cells and in&#xa0;vivo by employing murine and human xenograft pre-clinical disease models.<br><br>FINDINGS: We discovered a unique bacteria-derived metabolite signature intricately linked to endometriosis. The altered fecal metabolite profile exhibits a strong correlation with that observed in inflammatory bowel disease (IBD), revealing intriguing connections between these two conditions. Notably, we validated 4-hydroxyindole, a gut-bacteria-derived metabolite that is lower in stool samples of endometriosis. Extensive in&#xa0;vivo studies found that 4-hydroxyindole suppressed the initiation and progression of endometriosis-associated inflammation and hyperalgesia in heterologous mouse and in pre-clinical models of the disease.<br><br>CONCLUSIONS: Our findings are the first to provide a distinct stool metabolite signature in women with endometriosis, which could serve as stool-based non-invasive diagnostics. Further, the gut-microbiota-derived 4-hydroxyindole poses as a therapeutic candidate for ameliorating endometriosis.<br><br>FUNDING: This work was funded by the NIH/NICHD grants (R01HD102680, R01HD104813) and a Research Scholar Grant from the American Cancer Society to R.K.}, }
@article {pmid39387577, year = {2024}, author = {Beck, KL and Haiminen, N and Agarwal, A and Carrieri, AP and Madgwick, M and Kelly, J and Pylro, V and Kawas, B and Wiedmann, M and Ganda, E}, title = {Development and evaluation of statistical and artificial intelligence approaches with microbial shotgun metagenomics data as an untargeted screening tool for use in food production.}, journal = {mSystems}, volume = {9}, number = {11}, pages = {e0084024}, pmid = {39387577}, issn = {2379-5077}, support = {#PEN04752, #PEN04731//U.S. Department of Agriculture (USDA)/ ; }, mesh = {*Metagenomics/methods ; *Artificial Intelligence ; *Milk/microbiology/chemistry ; Animals ; Food Microbiology/methods ; Microbiota/genetics ; Algorithms ; Principal Component Analysis ; Machine Learning ; }, abstract = {UNLABELLED: The increasing knowledge of microbial ecology in food products relating to quality and safety and the established usefulness of machine learning algorithms for anomaly detection in multiple scenarios suggests that the application of microbiome data in food production systems for anomaly detection could be a valuable approach to be used in food systems. These methods could be used to identify ingredients that deviate from their typical microbial composition, which could indicate food fraud or safety issues. The objective of this study was to assess the feasibility of using shotgun sequencing data as input into anomaly detection algorithms using fluid milk as a model system. Contrastive principal component analysis (PCA), cluster-based methods, and explainable artificial intelligence (AI) were evaluated for the detection of two anomalous sample classes using longitudinal metagenomic profiling of fluid milk compared to baseline (BL) samples collected under comparable circumstances. Traditional methods (alpha and beta diversity, clustering-based contrastive PCA, multidimensional scaling, and dendrograms) failed to differentiate anomalous sample classes; however, explainable AI was able to classify anomalous vs baseline samples and indicate microbial drivers in association with antibiotic use. We validated the potential for explainable AI to classify different milk sources using larger publicly available fluid milk 16S rDNA sequencing data sets and demonstrated that explainable AI is able to differentiate between milk storage methods, processing stages, and seasons. Our results indicate that the application of artificial intelligence continues to hold promise in the realm of microbiome data analysis and could present further opportunities for downstream analytic automation to aid in food safety and quality.<br><br>IMPORTANCE: We evaluated the feasibility of using untargeted metagenomic sequencing of raw milk for detecting anomalous food ingredient content with artificial intelligence methods in a study specifically designed to test this hypothesis. We also show through analysis of publicly available fluid milk microbial data that our artificial intelligence approach is able to successfully predict milk in different stages of processing. The approach could potentially be applied in the food industry for safety and quality control.}, }
@article {pmid39394961, year = {2024}, author = {Branck, T and Hu, Z and Nickols, WA and Walsh, AM and Bhosle, A and Short, MI and Nearing, JT and Asnicar, F and McIver, LJ and Maharjan, S and Rahnavard, A and Louyakis, AS and Badri, DV and Brockel, C and Thompson, KN and Huttenhower, C}, title = {Comprehensive profile of the companion animal gut microbiome integrating reference-based and reference-free methods.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39394961}, issn = {1751-7370}, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Dogs/microbiology ; Cats ; *Pets/microbiology ; *Feces/microbiology ; *Phylogeny ; *Metagenome ; Humans ; *Metagenomics ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {The gut microbiome of companion animals is relatively underexplored, despite its relevance to animal health, pet owner health, and basic microbial community biology. Here, we provide the most comprehensive analysis of the canine and feline gut microbiomes to date, incorporating 2639 stool shotgun metagenomes (2272 dog and 367 cat) spanning 14 publicly available datasets (n = 730) and 8 new study populations (n = 1909). These are compared with 238 and 112 baseline human gut metagenomes from the Human Microbiome Project 1-II and a traditionally living Malagasy cohort, respectively, processed in a manner identical to the animal metagenomes. All microbiomes were characterized using reference-based taxonomic and functional profiling, as well as de novo assembly yielding metagenomic assembled genomes clustered into species-level genome bins. Companion animals shared 184 species-level genome bins not found in humans, whereas 198 were found in all three hosts. We applied novel methodology to distinguish strains of these shared organisms either transferred or unique to host species, with phylogenetic patterns suggesting host-specific adaptation of microbial lineages. This corresponded with functional divergence of these lineages by host (e.g. differences in metabolic and antibiotic resistance genes) likely important to companion animal health. This study provides the largest resource to date of companion animal gut metagenomes and greatly contributes to our understanding of the "One Health" concept of a shared microbial environment among humans and companion animals, affecting infectious diseases, immune response, and specific genetic elements.}, }
@article {pmid39394504, year = {2024}, author = {Passarini, MRZ and Robayo, MIG and Ottoni, JR and Duarte, AWF and Rosa, LH}, title = {Biotechnological potential in agriculture of soil Antarctic microorganisms revealed by omics approach.}, journal = {World journal of microbiology &amp; biotechnology}, volume = {40}, number = {11}, pages = {345}, pmid = {39394504}, issn = {1573-0972}, support = {N&#xba; 205/2021//Program Institutional Triple Agenda EDITAL PRPPG/ ; }, mesh = {*Soil Microbiology ; Antarctic Regions ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; *Agriculture ; *Fungi/classification/genetics/isolation &amp; purification/metabolism ; *Biotechnology ; *Metagenomics ; High-Throughput Nucleotide Sequencing ; Soil/chemistry ; Phylogeny ; Nitrogen/metabolism ; Microbiota ; }, abstract = {The biotechnological potential for agricultural applications in the soil in the thawing process on Whalers Bay, Deception Island, Antarctica was evaluated using a metagenomic approach through high-throughput sequencing. Approximately 22.70% of the sequences were affiliated to the phyla of the Bacteria dominion, followed by 0.26% to the Eukarya. Proteobacteria (Bacteria) and Ascomycota (Fungi) were the most abundant phyla. Thirty-two and thirty-six bacterial and fungal genera associated with agricultural biotechnological applications were observed. Streptomyces and Pythium were the most abundant genera related to the Bacteria and Oomycota, respectively. The main agricultural application associated with bacteria was nitrogen affixation; in contrast for fungi, was associated with phytopathogenic capabilities. The present study showed the need to use metagenomic technology to understand the dynamics and possible metabolic pathways associated with the microbial communities present in the soil sample in the process of thawing recovered from the Antarctic continent, which presented potential application in processes of agro-industrial interest.}, }
@article {pmid39393653, year = {2024}, author = {Li, Y and Huang, F and Dong, S and Liu, L and Lin, L and Li, Z and Zheng, Y and Hu, Z}, title = {Microbiota succession, species interactions, and metabolic functions during autotrophic biofloc formation in zero-water-exchange shrimp farming without organic carbon supplements.}, journal = {Bioresource technology}, volume = {414}, number = {}, pages = {131584}, doi = {10.1016/j.biortech.2024.131584}, pmid = {39393653}, issn = {1873-2976}, mesh = {Animals ; *Aquaculture/methods ; *Microbiota ; *Carbon ; *Nitrogen ; *Bacteria/metabolism ; *Autotrophic Processes ; Penaeidae ; Microalgae/metabolism ; Ammonia/metabolism ; }, abstract = {Autotrophic bioflocs (ABF) exhibits lower energy consumption, more environment-friendly and cost-effective than heterotrophic bioflocs depending on organic carbon supplements. Whereas ABF has not been widely applied to aquaculture production. Here, ABF successfully performed to control ammonia and nitrite under harmless levels even when carbon-to-nitrogen ratio reduced to 2.0, during 12-week shrimp farming in commercial scale. ABF was mainly dominated by bacteria of Proteobacteria, Bacteroidota, Chloroflexi and eukaryotes of Bacillariophyta, Rotifera, Ciliophora. A notable shift occurred in ABF with the significant decreases of Proteobacteria and Rotifera replaced by Bacteroidota, Chloroflexi, and Bacillariophyta after four weeks. Nitrogen metabolism was synergistically executed by bacteria and microalgae, especially the positive interaction between Nitrospira and Halamphora for ABF nitrification establishment. Metagenomics confirmed the complete functional genes of key bacteria related to the cycling of carbon, nitrogen, and phosphorus by ABF. This study may promote the development application of ABF in low-carbon shrimp aquaculture.}, }
@article {pmid39393228, year = {2024}, author = {Dey, G and Maity, JP and Banerjee, P and Sharma, RK and Das, K and Gnanachandrasamy, G and Wang, CW and Lin, PY and Wang, SL and Chen, CY}, title = {Evaluation and mitigation of potentially toxic elements contamination in mangrove ecosystem: Insights into phytoremediation and microbial perspective.}, journal = {Marine pollution bulletin}, volume = {209}, number = {Pt A}, pages = {117035}, doi = {10.1016/j.marpolbul.2024.117035}, pmid = {39393228}, issn = {1879-3363}, mesh = {*Biodegradation, Environmental ; *Wetlands ; *Water Pollutants, Chemical/analysis ; Taiwan ; Avicennia ; Environmental Monitoring ; Geologic Sediments/chemistry/microbiology ; Microbiota ; Ecosystem ; }, abstract = {Mangroves, essential coastal ecosystems, are threatened by human-induced Potentially-toxic-elements (PTEs) pollution. This study analyzed PTEs distribution, phytoremediation potential, and rhizosphere microbial communities in Taiwan's Xinfeng mangrove forest. Significant variations in physicochemical and PTEs concentrations were observed across adjacent water bodies, with moderate contamination in the river, estuary, and overlying water of mangroves sediment. The partition-coefficient showed the mobility of Bi, Pb, Co, and Sr at the water-sediment interface. The geochemical-indices revealed high Bi and Pb contamination and moderate Zn, Sr, Cu, and Cd contamination in sediment. The overall pollution indices indicated the significant contamination, while moderate ecological risk was found for Cd (40 ≤ Er[i] < 80). Mangroves Kandelia obovata and Avicennia marina exhibited promising PTEs phytoremediation potential (Bi, Cd, Mn, Sr, and Co). Metagenomics indicated a diverse microbial community with N-fixation, P-solubilization, IAA synthesis, and PTEs-resistance genes. These findings underscore the need for targeted conservation to protect these critical habitats.}, }
@article {pmid39390034, year = {2024}, author = {Delanghe, L and De Boeck, I and Van Malderen, J and Allonsius, CN and Van Rillaer, T and Bron, PA and Claes, I and Hagendorens, M and Lebeer, S and Leysen, J}, title = {Mild atopic dermatitis is characterized by increase in non-staphylococcus pathobionts and loss of specific species.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {23659}, pmid = {39390034}, issn = {2045-2322}, support = {HBC.2020.2873//Agentschap Innoveren en Ondernemen/ ; HBC.2020.2873//Agentschap Innoveren en Ondernemen/ ; 12S4222N//Fonds Wetenschappelijk Onderzoek/ ; 1S08523N//Fonds Wetenschappelijk Onderzoek/ ; 852600/ERC_/European Research Council/International ; }, mesh = {*Dermatitis, Atopic/microbiology ; Humans ; *Microbiota ; *Skin/microbiology/pathology ; Female ; Adult ; Male ; Staphylococcus aureus/genetics/isolation &amp; purification/pathogenicity ; Bacteria/classification/genetics ; Middle Aged ; Metagenomics/methods ; }, abstract = {Atopic dermatitis is the most common inflammatory skin condition with a severe negative impact on patients' quality of life. The etiology of AD is complex and depends on age, genetics, the immune system, environmental factors, and the skin microbiome, with a key role for pathogenic Staphylococcus aureus in the development of severe AD. However, the composition of the skin microbiome in mild AD is understudied. Here, using metagenomic shallow shotgun sequencing, we showed that mild AD lesions did not show a significant difference in the diversity of the skin microbiome compared to samples from non-AD patients and that the relative abundance of S. aureus did not differ in these mild AD lesions. However, when we assessed other taxa, Mycobacterium ostraviense, Pedobacter panaciterrae_A and four Streptomyces species were identified with higher abundances in mild AD lesions and species of 15 genera were decreased in abundance. The highest fold decreases were observed for Paracoccus marcusii, Microbacterium lacticum, Micrococcus luteus, and Moraxella sp002478835. These microbiome compositional insights are a first step towards novel microbiome-based diagnostics and therapeutics for early intervention at the stage of mild AD and provide a path forward for the functional study of species involved in this often-overlooked patient population.}, }
@article {pmid39390025, year = {2024}, author = {Larsson, A and Ericson, U and Jönsson, D and Miari, M and Athanasiadis, P and Baldanzi, G and Brunkwall, L and Hellstrand, S and Klinge, B and Melander, O and Nilsson, PM and Fall, T and Maziarz, M and Orho-Melander, M}, title = {New connections of medication use and polypharmacy with the gut microbiota composition and functional potential in a large population.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {23723}, pmid = {39390025}, issn = {2045-2322}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Polypharmacy ; Male ; Female ; Middle Aged ; Sweden ; Aged ; Adult ; }, abstract = {Medication can affect the gut microbiota composition and function. The aim of this study was to investigate connections between use of common non-antibiotic medicines and the gut microbiota composition and function in a large Swedish cohort (N = 2223). Use of 67 medications and polypharmacy (≥ 5 medications), based on self-reported and prescription registry data, were associated with the relative abundance of 881 gut metagenomic species (> 5% prevalence) and 103 gut metabolic modules (GMMs). Altogether, 97 associations of 26 medications with 40 species and of four medications with five GMMs were observed (false discovery rate < 5%). Several earlier findings were replicated like the positive associations of proton pump inhibitors (PPIs) with numerous oral species, and those of metformin with Escherichia species and with lactate consumption I and arginine degradation II. Several new associations were observed between, among others, use of antidepressants, beta-blockers, nonsteroidal anti-inflammatory drugs and calcium channel blockers, and specific species. Polypharmacy was positively associated with Enterococcus faecalis, Bacteroides uniformis, Rothia mucilaginosa, Escherichia coli and Limosilactobacillus vaginalis, and with 13 GMMs. We confirmed several previous findings and identified numerous new associations between use of medications/polypharmacy and the gut microbiota composition and functional potential. Further studies are needed to confirm the new findings.}, }
@article {pmid39390011, year = {2024}, author = {Kim, HS and Oh, SJ and Kim, BK and Kim, JE and Kim, BH and Park, YK and Yang, BG and Lee, JY and Bae, JW and Lee, CK}, title = {Dysbiotic signatures and diagnostic potential of gut microbial markers for inflammatory bowel disease in Korean population.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {23701}, pmid = {39390011}, issn = {2045-2322}, support = {2017R1A5A2014768//National Research Foundation of Korea/ ; 2021R1C1C2008556//National Research Foundation of Korea/ ; HI23C0661//Korea Health Industry Development Institute/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Dysbiosis/diagnosis/microbiology ; Female ; Male ; Republic of Korea/epidemiology ; Adult ; Middle Aged ; *Biomarkers ; *RNA, Ribosomal, 16S/genetics ; *Feces/microbiology ; *Inflammatory Bowel Diseases/microbiology/diagnosis ; Colitis, Ulcerative/microbiology/diagnosis ; Metagenomics/methods ; Crohn Disease/microbiology/diagnosis ; Case-Control Studies ; Cross-Sectional Studies ; Young Adult ; Aged ; }, abstract = {Fecal samples were collected from 640 individuals in Korea, including 523 patients with IBD (223 with Crohn's disease [CD] and 300 with ulcerative colitis [UC]) and 117 healthy controls. The samples were subjected to cross-sectional gut metagenomic analysis using 16 S rRNA sequencing and bioinformatics analysis. Patients with IBD, particularly those with CD, exhibited significantly lower alpha diversities than the healthy subjects. Differential abundance analysis revealed dysbiotic signatures, characterized by an expansion of the genus Escherichia-Shigella in patients with CD. Functional annotations showed that functional pathways related to bacterial pathogenesis and production of hydrogen sulfide (H2S) were strongly upregulated in patients with CD. A dysbiosis score, calculated based on functional characteristics, highly correlated with disease severity. Markers distinguishing between healthy subjects and patients with IBD showed accurate classification based on a small number of microbial taxa, which may be used to diagnose ambiguous cases. These findings confirm the taxonomic and functional dysbiosis of the gut microbiota in patients with IBD, especially those with CD. Taxa indicative of dysbiosis may have significant implications for future clinical research on the management and diagnosis of IBD.}, }
@article {pmid39389770, year = {2024}, author = {Xu, Y and Yan, Y and Zhou, T and Lu, Y and Yang, X and Tang, K and Liu, F}, title = {Synergy between Arbuscular Mycorrhizal Fungi and Rhizosphere Bacterial Communities Increases the Utilization of Insoluble Phosphorus and Potassium in the Soil by Maize.}, journal = {Journal of agricultural and food chemistry}, volume = {72}, number = {42}, pages = {23631-23642}, doi = {10.1021/acs.jafc.4c07428}, pmid = {39389770}, issn = {1520-5118}, mesh = {*Mycorrhizae/metabolism ; *Phosphorus/metabolism ; *Zea mays/microbiology/metabolism ; *Rhizosphere ; *Soil Microbiology ; *Potassium/metabolism ; *Bacteria/metabolism/genetics/classification/isolation &amp; purification ; *Soil/chemistry ; Plant Roots/microbiology/metabolism ; }, abstract = {Arbuscular mycorrhizal (AM) fungi can enhance plant uptake of phosphorus (P) and potassium (K), but it is not yet clear whether rhizosphere bacteria can enhance the ability of AM fungi to acquire insoluble P and K from the soil. Here, pot experiments confirmed that AM fungus-promoted insoluble P and K uptake by plants requires rhizosphere bacteria. The changes of rhizosphere bacterial communities associated with AM fungi were explored by 16S rRNA amplicon sequencing and metagenomic sequencing. Five core bacteria genera identified were involved in P and K cycles. Synthetic community (SynCom) inoculation revealed that SynCom increased soil available P and K and its coinoculation with AM fungi increased P and K concentration in the plants. This study revealed that AM fungi interact with rhizosphere bacteria and promote insoluble P and K acquisition, which provided a foundation for the application of AM fungal-bacterial biofertilizers and was beneficial for the sustainable development of agriculture.}, }
@article {pmid39389057, year = {2024}, author = {Hou, X and He, Y and Fang, P and Mei, SQ and Xu, Z and Wu, WC and Tian, JH and Zhang, S and Zeng, ZY and Gou, QY and Xin, GY and Le, SJ and Xia, YY and Zhou, YL and Hui, FM and Pan, YF and Eden, JS and Yang, ZH and Han, C and Shu, YL and Guo, D and Li, J and Holmes, EC and Li, ZR and Shi, M}, title = {Using artificial intelligence to document the hidden RNA virosphere.}, journal = {Cell}, volume = {187}, number = {24}, pages = {6929-6942.e16}, doi = {10.1016/j.cell.2024.09.027}, pmid = {39389057}, issn = {1097-4172}, mesh = {*RNA Viruses/genetics/isolation &amp; purification ; *RNA-Dependent RNA Polymerase/genetics ; *RNA, Viral/genetics ; Genome, Viral/genetics ; Artificial Intelligence ; Virome/genetics ; Phylogeny ; Metagenomics/methods ; Algorithms ; Deep Learning ; Hot Springs/virology ; Hydrothermal Vents/virology ; }, abstract = {Current metagenomic tools can fail to identify highly divergent RNA viruses. We developed a deep learning algorithm, termed LucaProt, to discover highly divergent RNA-dependent RNA polymerase (RdRP) sequences in 10,487 metatranscriptomes generated from diverse global ecosystems. LucaProt integrates both sequence and predicted structural information, enabling the accurate detection of RdRP sequences. Using this approach, we identified 161,979 potential RNA virus species and 180 RNA virus supergroups, including many previously poorly studied groups, as well as RNA virus genomes of exceptional length (up to 47,250 nucleotides) and genomic complexity. A subset of these novel RNA viruses was confirmed by RT-PCR and RNA/DNA sequencing. Newly discovered RNA viruses were present in diverse environments, including air, hot springs, and hydrothermal vents, with virus diversity and abundance varying substantially among ecosystems. This study advances virus discovery, highlights the scale of the virosphere, and provides computational tools to better document the global RNA virome.}, }
@article {pmid39389029, year = {2024}, author = {Qian, J and Yeo, EN and Olm, MR}, title = {Hospitalization throws the preterm gut microbiome off-key.}, journal = {Cell host &amp; microbe}, volume = {32}, number = {10}, pages = {1651-1653}, doi = {10.1016/j.chom.2024.09.009}, pmid = {39389029}, issn = {1934-6069}, mesh = {*Gastrointestinal Microbiome ; Humans ; Infant, Newborn ; *Feces/microbiology ; *Intensive Care Units, Neonatal ; *Metagenomics ; *Infant, Premature ; Hospitalization ; Infant ; }, abstract = {Environmental exposures substantially influence the infant gut microbiome. In this issue of Cell Host &amp; Microbe, Thänert et al.[1] characterize how medical interventions in the neonatal intensive care unit (NICU) shape gut microbiome dynamics in the first months of life by analyzing over 2,500 fecal samples with metagenomics and metatranscriptomics.}, }
@article {pmid39384807, year = {2024}, author = {Minot, SS and Li, N and Srinivasan, H and Ayers, JL and Yu, M and Koester, ST and Stangis, MM and Dominitz, JA and Halberg, RB and Grady, WM and Dey, N}, title = {Colorectal cancer-associated bacteria are broadly distributed in global microbiomes and drivers of precancerous change.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {23646}, pmid = {39384807}, issn = {2045-2322}, support = {K08 DK111941/DK/NIDDK NIH HHS/United States ; R50 CA233042/CA/NCI NIH HHS/United States ; U54 CA274374/CA/NCI NIH HHS/United States ; R50CA233042//U.S. Department of Health and Human Services | NIH | National Cancer Institute (NCI)/ ; }, mesh = {*Colorectal Neoplasms/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; Animals ; Humans ; Mice ; *Bacteria/genetics/classification ; *Precancerous Conditions/microbiology ; Metagenomics/methods ; }, abstract = {The gut microbiome is implicated in the pathogenesis of colorectal cancer (CRC), but the full scope of this dialogue is unknown. Here we aimed to define the scale and membership of the body of CRC- and health-associated gut bacteria in global populations. We performed a microbiome-CRC correlation analysis of published ultra-deep shotgun metagenomic sequencing data from global microbiome surveys, utilizing a de novo (reference-agnostic) gene-level clustering approach to identify protein-coding co-abundant gene (CAGs) clusters. We link an unprecedented ~ 23-40% of gut bacteria to CRC or health, split nearly evenly as CRC- or health-associated. These microbes encode 2319 CAGs encompassing 427,261 bacterial genes significantly enriched or depleted in CRC. We identified many microbes that had not previously been linked to CRC, thus expanding the scope of "known unknowns" of CRC-associated microbes. We performed an agnostic CAG-based screen of bacterial isolates and validated predicted effects of previously unimplicated bacteria in preclinical models, in which we observed differential induction of precancerous adenomas and field effects. Single-cell RNA sequencing disclosed microbiome-induced senescence-associated gene expression signatures in discrete colonic populations including fibroblasts. In organoid co-cultures, primary colon fibroblasts from mice with microbiomes promoted significantly greater growth than fibroblasts from microbiome-depleted mice. These results offer proof-of-principle for gene-level metagenomic analysis enabling discovery of microbiome links to health and demonstrate that the microbiome can drive precancer states, thereby potentially revealing novel cancer prevention opportunities.}, }
@article {pmid39383807, year = {2025}, author = {Zhang, Q and Ji, XM and Wang, X and Wang, W and Xu, X and Zhang, Q and Xing, D and Ren, N and Lee, DJ and Chen, C}, title = {Differentiation of the Anammox core microbiome: Unraveling the evolutionary impetus of scalable gene flow.}, journal = {Water research}, volume = {268}, number = {Pt A}, pages = {122580}, doi = {10.1016/j.watres.2024.122580}, pmid = {39383807}, issn = {1879-2448}, mesh = {*Microbiota ; *Gene Flow ; Phylogeny ; Ammonium Compounds/metabolism ; Oxidation-Reduction ; Bacteria/metabolism/genetics ; Anaerobiosis ; }, abstract = {Anaerobic ammonium oxidation bacteria (AAOB), distinguished by their unique autotrophic nitrogen metabolism, hold pivotal positions in the global nitrogen cycle and environmental biotechnologies. However, the ecophysiology and evolution of AAOB remain poorly understood, attributed to the absence of monocultures. Hence, a comprehensive elucidation of the AAOB-dominated core microbiome, anammox core, is imperative to further completing the theory of engineered nitrogen removal and ecological roles of anammox. Performing taxonomic and phylogenetic analyses on collected genome repertoires, we show here that Candidatus Brocadia and Candidatus Kuenenia possesses a more compact core than Candidatus Jettenia, which partly explains why the latter has a less common ecological presence. Evidence of gene flow is particularly striking in functions related to biosynthesis and oxygen detoxification, underscoring the evolutionary forces driving lineage and core differentiation. Furthermore, CRISPR spacer traceback of the AAOB metagenome-assembled genomes (MAGs) reveals a series of genetic traces for the concealed phages. By reconceptualizing the functional divergence of AAOB with the historical role of phages, we ultimately propose a coevolutionary framework to understand the evolutionary trajectory of anammox microecology. The discoveries provided in this study offer new insights into understanding the evolution of AAOB and the ecology of anammox.}, }
@article {pmid39381854, year = {2025}, author = {Drahun, I and Morrison, K and Poole, EA and van Herk, WG and Cassone, BJ}, title = {Characterisation of the bacteriomes harboured by major wireworm pest species in the Canadian Prairies.}, journal = {Insect molecular biology}, volume = {34}, number = {1}, pages = {203-217}, pmid = {39381854}, issn = {1365-2583}, support = {RGPIN-2016-04335//Natural Sciences and Engineering Research Council of Canada/ ; RGPIN-2023-04126//Natural Sciences and Engineering Research Council of Canada/ ; //Brandon University Research Committee/ ; }, mesh = {Animals ; *Coleoptera/microbiology/growth &amp; development ; *Larva/microbiology/growth &amp; development ; *RNA, Ribosomal, 16S/genetics ; Manitoba ; Microbiota ; Bacteria/classification/genetics ; Grassland ; Canada ; }, abstract = {Nearly all insects harbour bacterial communities that can have a profound effect on their life history, including regulating and shaping host metabolism, development, immunity and fitness. The bacteriomes of several coleopterans have been described; however, very little has been reported for wireworms. These long-lived larvae of click beetles (Coleoptera: Elateridae) are major agricultural pests of a variety of crops grown in the Canadian Prairies. Consequently, the goal of this study was to characterise the bacteriomes of five of the most significant pest species within the region: Limonius californicus, Hypnoidus abbreviatus, H. bicolor, Aeolus mellillus and Dalopius spp. To do this, we collected larvae from southern Manitoba fields (pre-seeding) and carried out 16S rRNA sequencing on individual specimens. Our results indicate wireworms have diverse and taxon-rich bacterial communities, with over 400 genera identified predominately from the phyla Proteobacteria, Actinobacteriota, Bacteroidota and Firmicutes. However, each species had nine or fewer genera comprising >80% of their bacteriome. Network analyses revealed some community structuring consistent among species, which may culminate in shaping/regulating host biology. Moreover, the microbial signatures were influenced by both ontogeny (early vs. late stage larvae) and reproductive strategy (sexual vs. parthenogenetic), with a myriad of other factors likely contributing to bacterial diversity that are impossible to resolve from our study. Overall, this metagenomics study represents the first to characterise the bacteriomes of wireworms in the Canadian Prairies and the findings could assist in the development of sustainable management strategies for these important agricultural pests.}, }
@article {pmid39380016, year = {2024}, author = {Ju, Y and Zhang, Z and Liu, M and Lin, S and Sun, Q and Song, Z and Liang, W and Tong, X and Jie, Z and Lu, H and Cai, K and Chen, P and Jin, X and Zhang, W and Xu, X and Yang, H and Wang, J and Hou, Y and Xiao, L and Jia, H and Zhang, T and Guo, R}, title = {Integrated large-scale metagenome assembly and multi-kingdom network analyses identify sex differences in the human nasal microbiome.}, journal = {Genome biology}, volume = {25}, number = {1}, pages = {257}, pmid = {39380016}, issn = {1474-760X}, mesh = {Humans ; Male ; Female ; *Metagenome ; *Microbiota ; Adult ; Nose/microbiology ; Sex Characteristics ; Young Adult ; Bacteria/genetics/classification ; Sex Factors ; Metagenomics/methods ; }, abstract = {BACKGROUND: Respiratory diseases impose an immense health burden worldwide. Epidemiological studies have revealed extensive disparities in the incidence and severity of respiratory tract infections between men and women. It has been hypothesized that there might also be a nasal microbiome axis contributing to the observed sex disparities.<br><br>RESULTS: Here, we study the nasal microbiome of healthy young adults in the largest cohort to date with 1593 individuals, using shotgun metagenomic sequencing. We compile the most comprehensive reference catalog for the nasal bacterial community containing 4197 metagenome-assembled genomes and integrate the mycobiome, to provide a valuable resource and a more holistic perspective for the understudied human nasal microbiome. We systematically evaluate sex differences and reveal extensive sex-specific features in both taxonomic and functional levels in the nasal microbiome. Through network analyses, we capture markedly higher ecological stability and antagonistic potentials in the female nasal microbiome compared to the male's. The analysis of the keystone bacteria reveals that the sex-dependent evolutionary characteristics might have contributed to these differences.<br><br>CONCLUSIONS: In summary, we construct the most comprehensive catalog of metagenome-assembled-genomes for the nasal bacterial community to provide a valuable resource for the understudied human nasal microbiome. On top of that, comparative analysis in relative abundance and microbial co-occurrence networks identify extensive sex differences in the respiratory tract community, which may help to further our understanding of the observed sex disparities in the respiratory diseases.}, }
@article {pmid39379175, year = {2024}, author = {Zheng, D and Wilén, BM and Öberg, O and Wik, T and Modin, O}, title = {"Metagenomics reveal the potential for geosmin and 2-methylisoborneol production across multiple bacterial phyla in recirculating aquaculture systems".}, journal = {Environmental microbiology}, volume = {26}, number = {10}, pages = {e16696}, doi = {10.1111/1462-2920.16696}, pmid = {39379175}, issn = {1462-2920}, support = {2020-02639//Svenska Forskningsr&#xe5;det Formas/ ; }, mesh = {*Metagenomics ; *Bacteria/genetics/classification/metabolism ; *Aquaculture ; *Naphthols/metabolism ; *Camphanes/metabolism ; Phylogeny ; Archaea/genetics/metabolism/classification ; Microbiota ; Metagenome ; }, abstract = {Geosmin and 2-methylisoborneol (MIB) are known to cause taste-and-odour problems in recirculating aquaculture systems (RAS). Both geosmin and MIB are microbial metabolites belonging to terpenoids. Precursors for terpenoids are biosynthesized via the methylerythritol phosphate (MEP) and the mevalonate (MVA) pathways. We carried out a metagenomic analysis of 50 samples from five RAS to investigate terpenoid biosynthesis and metabolic potential for geosmin and MIB production in RAS microbiomes. A total of 1008 metagenome-assembled genomes (MAGs) representing 26 bacterial and three archaeal phyla were recovered. Although most archaea are thought to use the MVA pathway for terpenoid precursor biosynthesis, an Iainarchaeota archaeal MAG is shown to harbour a complete set of genes encoding the MEP pathway but lacking genes associated with the MVA pathway. In this study, a total of 16 MAGs affiliated with five bacterial phyla (Acidobacteriota, Actinobacteriota, Bacteroidota, Chloroflexota, and Myxococcota) were identified as possessing potential geosmin or MIB synthases. These putative taste and odour producers were diverse, many were taxonomically unidentified at the genus or species level, and their relative abundance differed between the investigated RAS farms. The metagenomic study of the RAS microbiomes revealed a previously unknown phylogenetic diversity of the potential to produce geosmin and MIB.}, }
@article {pmid39378970, year = {2025}, author = {Zharikova, AA and Andrianova, NV and Silachev, DN and Nebogatikov, VO and Pevzner, IB and Makievskaya, CI and Zorova, LD and Maleev, GV and Baydakova, GV and Chistyakov, DV and Goriainov, SV and Sergeeva, MG and Burakova, IY and Gureev, AP and Popkov, VA and Ustyugov, AA and Plotnikov, EY}, title = {Analysis of the brain transcriptome, microbiome and metabolome in ketogenic diet and experimental stroke.}, journal = {Brain, behavior, and immunity}, volume = {123}, number = {}, pages = {571-585}, doi = {10.1016/j.bbi.2024.10.004}, pmid = {39378970}, issn = {1090-2139}, mesh = {Animals ; *Diet, Ketogenic/methods ; Rats ; *Brain/metabolism ; *Gastrointestinal Microbiome/physiology ; Male ; *Metabolome ; *Transcriptome ; *Stroke/metabolism ; *Infarction, Middle Cerebral Artery/metabolism ; Disease Models, Animal ; Rats, Sprague-Dawley ; }, abstract = {The ketogenic diet (KD) has been shown to be effective in treating various brain pathologies. In this study, we conducted detailed transcriptomic and metabolomic profiling of rat brains after KD and ischemic stroke in order to investigate the effects of KD and its underlying mechanisms. We evaluated the effect of a two-month KD on gene expression in intact brain tissue and after middle cerebral artery occlusion (MCAO). We analyzed the effects of KD on gut microbiome composition and blood metabolic profile as well as investigated the correlation between severity of neurological deficits and KD-induced changes. We found transcriptional reprogramming in the brain after stroke and KD treatment. The KD altered the expression of genes involved in the regulation of glucose and fatty acid metabolism, mitochondrial function, the immune response, Wnt-associated signaling, stem cell development, and neurotransmission, both in intact rats and after MCAO. The KD led to a significant change in the composition of gut microbiome and the levels of amino acids, acylcarnitines, polyunsaturated fatty acids, and oxylipins in the blood. However, the KD slightly worsened the neurological functions after MCAO, so that the therapeutic effect of the diet remained unproven.}, }
@article {pmid39378879, year = {2024}, author = {Wu, G and Xu, T and Zhao, N and Lam, YY and Ding, X and Wei, D and Fan, J and Shi, Y and Li, X and Li, M and Ji, S and Wang, X and Fu, H and Zhang, F and Shi, Y and Zhang, C and Peng, Y and Zhao, L}, title = {A core microbiome signature as an indicator of health.}, journal = {Cell}, volume = {187}, number = {23}, pages = {6550-6565.e11}, doi = {10.1016/j.cell.2024.09.019}, pmid = {39378879}, issn = {1097-4172}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Diabetes Mellitus, Type 2/microbiology ; Case-Control Studies ; Dietary Fiber/metabolism ; Metagenome ; Metagenomics/methods ; Health ; Microbiota ; }, abstract = {The gut microbiota is crucial for human health, functioning as a complex adaptive system akin to a vital organ. To identify core health-relevant gut microbes, we followed the systems biology tenet that stable relationships signify core components. By analyzing metagenomic datasets from a high-fiber dietary intervention in type 2 diabetes and 26 case-control studies across 15 diseases, we identified a set of stably correlated genome pairs within co-abundance networks perturbed by dietary interventions and diseases. These genomes formed a "two competing guilds" (TCGs) model, with one guild specialized in fiber fermentation and butyrate production and the other characterized by virulence and antibiotic resistance. Our random forest models successfully distinguished cases from controls across multiple diseases and predicted immunotherapy outcomes through the use of these genomes. Our guild-based approach, which is genome specific, database independent, and interaction focused, identifies a core microbiome signature that serves as a holistic health indicator and a potential common target for health enhancement.}, }
@article {pmid39378072, year = {2024}, author = {Koohi-Moghadam, M and Watt, RM and Leung, WK}, title = {Multi-site analysis of biosynthetic gene clusters from the periodontitis oral microbiome.}, journal = {Journal of medical microbiology}, volume = {73}, number = {10}, pages = {}, doi = {10.1099/jmm.0.001898}, pmid = {39378072}, issn = {1473-5644}, mesh = {Humans ; *Periodontitis/microbiology ; *Multigene Family ; *Mouth/microbiology ; *Microbiota/genetics ; *Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Pilot Projects ; Metagenomics/methods ; Saliva/microbiology ; Adult ; Male ; Biosynthetic Pathways/genetics ; Female ; Middle Aged ; High-Throughput Nucleotide Sequencing ; Metagenome ; }, abstract = {Background. Bacteria significantly influence human health and disease, with bacterial biosynthetic gene clusters (BGCs) being crucial in the microbiome-host and microbe-microbe interactions.Gap statement. Despite extensive research into BGCs within the human gut microbiome, their roles in the oral microbiome are less understood.Aim. This pilot study utilizes high-throughput shotgun metagenomic sequencing to examine the oral microbiota in different niches, particularly focusing on the association of BGCs with periodontitis.Methodology. We analysed saliva, subgingival plaque and supragingival plaque samples from periodontitis patients (n=23) and controls (n=16). DNA was extracted from these samples using standardized protocols. The high-throughput shotgun metagenomic sequencing was then performed to obtain comprehensive genetic information from the microbial communities present in the samples.Results. Our study identified 10 742 BGCs, with certain clusters being niche-specific. Notably, aryl polyenes and bacteriocins were the most prevalent BGCs identified. We discovered several 'novel' BGCs that are widely represented across various bacterial phyla and identified BGCs that had different distributions between periodontitis and control subjects. Our systematic approach unveiled the previously unexplored biosynthetic pathways that may be key players in periodontitis.Conclusions. Our research expands the current metagenomic knowledge of the oral microbiota in both healthy and periodontally diseased states. These findings highlight the presence of novel biosynthetic pathways in the oral cavity and suggest a complex network of host-microbe and microbe-microbe interactions, potentially influencing periodontal disease. The BGCs identified in this study pave the way for future investigations into the role of small-molecule-mediated interactions within the human oral microbiota and their impact on periodontitis.}, }
@article {pmid39377977, year = {2025}, author = {Tufail, MA and Schmitz, RA}, title = {Exploring the Probiotic Potential of Bacteroides spp. Within One Health Paradigm.}, journal = {Probiotics and antimicrobial proteins}, volume = {17}, number = {2}, pages = {681-704}, pmid = {39377977}, issn = {1867-1314}, support = {031B0846D//Bundesministerium f&#xfc;r Bildung und Forschung/ ; }, mesh = {*Probiotics ; Humans ; *Bacteroides/physiology/genetics ; Gastrointestinal Microbiome ; Animals ; }, abstract = {Probiotics are pivotal in maintaining or restoring the balance of human intestinal microbiota, a crucial factor in mitigating diseases and preserving the host's health. Exploration into Bacteroides spp. reveals substantial promise in their development as next-generation probiotics due to their profound interaction with host immune cells and capability to regulate the microbiome's metabolism by significantly impacting metabolite production. These beneficial bacteria exhibit potential in ameliorating various health issues such as intestinal disorders, cardiovascular diseases, behavioral disorders, and even cancer. Though it's important to note that a high percentage of them are as well opportunistic pathogens, posing risks under certain conditions. Studies highlight their role in modifying immune responses and improving health conditions by regulating lymphocytes, controlling metabolism, and preventing inflammation and cancer. The safety and efficacy of Bacteroides strains are currently under scrutiny by the European Commission for authorization in food processing, marking a significant step towards their commercialization. The recent advancements in bacterial isolation and sequencing methodologies, coupled with the integration of Metagenome-Assembled Genomes (MAGs) binning from metagenomics data, continue to unveil the potential of Bacteroides spp., aiding in the broader understanding and application of these novel probiotics in health and disease management.}, }
@article {pmid39377603, year = {2024}, author = {Colberg, O and Hermes, GDA and Licht, TR and Wichmann, A and Baker, A and Laursen, MF and Wellejus, A}, title = {Development of an infant colon simulating in vitro model, I-TIM-2, to study the effects of modulation strategies on the infant gut microbiome composition and function.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0072424}, pmid = {39377603}, issn = {2165-0497}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology/drug effects ; Infant ; *Feces/microbiology ; *Colon/microbiology/metabolism ; *Fatty Acids, Volatile/metabolism/analysis ; *Milk, Human/microbiology ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification/growth &amp; development ; Oligosaccharides/metabolism ; Female ; Breast Feeding ; Models, Biological ; Infant, Newborn ; Male ; }, abstract = {The early life stages are critical for the development of the gut microbiome. Variables such as antibiotics exposure, birth-mode via Cesarean section, and formula feeding are associated with disruptions in microbiome development and are related to adverse health effects later in life. Studying the effects of microbiome-modulating strategies in infants is challenged by appropriate ethical constraints. Therefore, we developed I-TIM-2, an infant in vitro colonic model based on the validated, computer-controlled, dynamic model of the colon, TIM-2. The system, consisting of four separate compartments, was inoculated with feces from four healthy, primarily breastfed infants, displaying distinctive microbiome profiles. For each infant's fecal sample, a 96-h experiment was performed, with two compartments receiving an infant diet adapted medium and two compartments additionally receiving five human milk oligosaccharides (HMOs) in physiological concentrations and proportions. Bacterial composition was determined by shotgun metagenomics and qPCR. Concentrations of short-chain fatty acids (SCFAs) and HMOs were determined by LC-MS. Microbial diversity and high amounts of inoculum-derived species were preserved in the model throughout each experiment. Microbiome composition and SCFA concentrations were consistent with published data from infants. HMOs strongly modulated the microbiome composition by stimulating relative proportions of Bifidobacterium. This affected the metabolic output and resulted in an increased production of acetic and formic acid, characteristic of bifidobacterial HMO metabolism. In conclusion, these data demonstrate the development of a valid model to study the dynamics and modulations of the infant gut microbiome and metabolome.IMPORTANCEThe infant gut microbiome is intricately linked to the health of its host. This is partly mediated through the bacterial production of metabolites that interact with the host cells. Human milk shapes the establishment of the infant gut microbiome as it contains human milk sugars that select for primarily bifidobacteria. The establishment can be disrupted by modern interventions such as formula feeding. This can alter the microbiome composition and metabolite production profile, which can affect the host. In this article, we set up an infant in vitro colonic model to study microbiome interactions and functions. In this model, we investigated the effects of human milk sugars and their promotion of bifidobacteria at the expense of other bacteria. The model is an ideal system to assess the effects of various modulating strategies on the infant gut microbiome and its interactions with its host.}, }
@article {pmid39377587, year = {2024}, author = {McMillan, AS and Zhang, G and Dougherty, MK and McGill, SK and Gulati, AS and Baker, ES and Theriot, CM}, title = {Metagenomic, metabolomic, and lipidomic shifts associated with fecal microbiota transplantation for recurrent Clostridioides difficile infection.}, journal = {mSphere}, volume = {9}, number = {10}, pages = {e0070624}, pmid = {39377587}, issn = {2379-5042}, support = {RM1 GM145416/GM/NIGMS NIH HHS/United States ; R01 GM141277/GM/NIGMS NIH HHS/United States ; R01 GM141277, RM1 GM145416//HHS | NIH | National Institute of General Medical Sciences (NIGMS)/ ; R35GM119438, R35GM149222//HHS | NIH | National Institute of General Medical Sciences (NIGMS)/ ; P42 ES027704/ES/NIEHS NIH HHS/United States ; R35 GM119438/GM/NIGMS NIH HHS/United States ; T32 DK007634/DK/NIDDK NIH HHS/United States ; STAR RD 84003201//Environmental Protection Agency (EPA)/ ; R35 GM149222/GM/NIGMS NIH HHS/United States ; }, mesh = {Humans ; *Fecal Microbiota Transplantation/methods ; *Clostridium Infections/therapy/microbiology ; *Clostridioides difficile/genetics/metabolism ; *Metabolomics ; *Gastrointestinal Microbiome ; *Feces/microbiology ; *Metagenomics/methods ; *Metabolome ; Male ; Lipidomics ; Female ; Bile Acids and Salts/metabolism ; Recurrence ; Middle Aged ; Aged ; Adult ; Metagenome ; }, abstract = {Recurrent C. difficile infection (rCDI) is an urgent public health threat, for which the last resort and lifesaving treatment is a fecal microbiota transplant (FMT). However, the exact mechanisms that mediate a successful FMT are not well-understood. Here, we use longitudinal stool samples collected from patients undergoing FMT to evaluate intra-individual changes in the microbiome, metabolome, and lipidome after successful FMTs relative to their baselines pre-FMT. We show changes in the abundance of many lipids, specifically a decrease in acylcarnitines post-FMT, and a shift from conjugated bile acids pre-FMT to deconjugated secondary bile acids post-FMT. These changes correlate with a decrease in Enterobacteriaceae, which encode carnitine metabolism genes, and an increase in Lachnospiraceae, which encode bile acid altering genes such as bile salt hydrolases (BSHs) and the bile acid-inducible (bai) operon, post-FMT. We also show changes in gut microbe-encoded amino acid biosynthesis genes, of which Enterobacteriaceae was the primary contributor to amino acids C. difficile is auxotrophic for. Liquid chromatography, ion mobility spectrometry, and mass spectrometry (LC-IMS-MS) revealed a shift from microbial conjugation of primary bile acids pre-FMT to secondary bile acids post-FMT. Here, we define the structural and functional changes associated with a successful FMT and generate hypotheses that require further experimental validation. This information is meant to help guide the development of new microbiota-focused therapeutics to treat rCDI.IMPORTANCERecurrent C. difficile infection is an urgent public health threat, for which the last resort and lifesaving treatment is a fecal microbiota transplant. However, the exact mechanisms that mediate a successful FMT are not well-understood. Here, we show changes in the abundance of many lipids, specifically acylcarnitines and bile acids, in response to FMT. These changes correlate with Enterobacteriaceae pre-FMT, which encodes carnitine metabolism genes, and Lachnospiraceae post-FMT, which encodes bile salt hydrolases and baiA genes. There was also a shift from microbial conjugation of primary bile acids pre-FMT to secondary bile acids post-FMT. Here, we define the structural and functional changes associated with a successful FMT, which we hope will help aid in the development of new microbiota-focused therapeutics to treat rCDI.}, }
@article {pmid39375774, year = {2024}, author = {Kosmopoulos, JC and Klier, KM and Langwig, MV and Tran, PQ and Anantharaman, K}, title = {Viromes vs. mixed community metagenomes: choice of method dictates interpretation of viral community ecology.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {195}, pmid = {39375774}, issn = {2049-2618}, mesh = {*Virome/genetics ; *Viruses/genetics/classification/isolation &amp; purification ; *Metagenomics/methods ; Humans ; *Metagenome ; *Genome, Viral/genetics ; Microbiota/genetics ; Soil Microbiology ; Fresh Water/virology/microbiology ; Gastrointestinal Microbiome/genetics ; }, abstract = {BACKGROUND: Viruses, the majority of which are uncultivated, are among the most abundant biological entities on Earth. From altering microbial physiology to driving community dynamics, viruses are fundamental members of microbiomes. While the number of studies leveraging viral metagenomics (viromics) for studying uncultivated viruses is growing, standards for viromics research are lacking. Viromics can utilize computational discovery of viruses from total metagenomes of all community members (hereafter metagenomes) or use physical separation of virus-specific fractions (hereafter viromes). However, differences in the recovery and interpretation of viruses from metagenomes and viromes obtained from the same samples remain understudied.<br><br>RESULTS: Here, we compare viral communities from paired viromes and metagenomes obtained from 60 diverse samples across human gut, soil, freshwater, and marine ecosystems. Overall, viral communities obtained from viromes had greater species richness and total viral genome abundances than those obtained from metagenomes, although there were some exceptions. Despite this, metagenomes still contained many viral genomes not detected in viromes. We also found notable differences in the predicted lytic state of viruses detected in viromes vs metagenomes at the time of sequencing. Other forms of variation observed include genome presence/absence, genome quality, and encoded protein content between viromes and metagenomes, but the magnitude of these differences varied by environment.<br><br>CONCLUSIONS: Overall, our results show that the choice of method can lead to differing interpretations of viral community ecology. We suggest that the choice of whether to target a metagenome or virome to study viral communities should be dependent on the environmental context and ecological questions being asked. However, our overall recommendation to researchers investigating viral ecology and evolution is to pair both approaches to maximize their respective benefits. Video Abstract.}, }
@article {pmid39375368, year = {2024}, author = {Jeong, E and Abdellaoui, N and Lim, JY and Seo, JA}, title = {The presence of a significant endophytic fungus in mycobiome of rice seed compartments.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {23367}, pmid = {39375368}, issn = {2045-2322}, support = {320036-5//Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry/ ; RS-2023-00230782//Rural Development Administration/ ; }, mesh = {*Seeds/anatomy &amp; histology/microbiology ; *Mycobiome/genetics ; *Oryza/anatomy &amp; histology/classification/microbiology ; *Fungi/classification/isolation &amp; purification/pathogenicity ; Basidiomycota/physiology ; Metagenome/genetics ; Crops, Agricultural/anatomy &amp; histology/microbiology ; Analysis of Variance ; Republic of Korea ; }, abstract = {Seed microbial communities have been known to have a crucial role in the life cycle of a plant. In this study, we examined the distribution of the fungal communities in three compartments (husk, brown rice, and milled rice) of the fourteen rice seed samples. Ten fungal genera distributed throughout the three compartments of the rice seeds were identified as the core mycobiome of the rice seeds, regardless of collecting regions or cultivars. Based on the diversity analysis, the distribution of the fungal community in milled rice was found to be more diversified, evenly distributed, and differently clustered from the other two compartments. Among the core mycobiome, Moesziomyces dominated almost 80% of the fungal communities in the outer compartments of rice seeds, whereas the abundances of other endophytic pathogenic fungi declined. Our results provide that antagonistic yeast Moesziomyces may be able to control the endogenous pathogenic fungal communities in rice seeds, hence maintaining the quality of rice seeds. In addition, the distribution of fungal communities differs depending on the rice seed's compartment, indicating that the compartment can affect the distribution of the seed microbial community.}, }
@article {pmid39375348, year = {2024}, author = {Kang, X and Zhang, W and Li, Y and Luo, X and Schönhuth, A}, title = {HyLight: Strain aware assembly of low coverage metagenomes.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8665}, pmid = {39375348}, issn = {2041-1723}, mesh = {*Metagenome/genetics ; *High-Throughput Nucleotide Sequencing/methods ; Metagenomics/methods ; Microbiota/genetics ; Sequence Analysis, DNA/methods ; Bacteria/genetics/classification ; Genome, Bacterial ; Software ; }, abstract = {Different strains of identical species can vary substantially in terms of their spectrum of biomedically relevant phenotypes. Reconstructing the genomes of microbial communities at the level of their strains poses significant challenges, because sequencing errors can obscure strain-specific variants. Next-generation sequencing (NGS) reads are too short to resolve complex genomic regions. Third-generation sequencing (TGS) reads, although longer, are prone to higher error rates or substantially more expensive. Limiting TGS coverage to reduce costs compromises the accuracy of the assemblies. This explains why prior approaches agree on losses in strain awareness, accuracy, tendentially excessive costs, or combinations thereof. We introduce HyLight, a metagenome assembly approach that addresses these challenges by implementing the complementary strengths of TGS and NGS data. HyLight employs strain-resolved overlap graphs (OG) to accurately reconstruct individual strains within microbial communities. Our experiments demonstrate that HyLight produces strain-aware and contiguous assemblies at minimal error content, while significantly reducing costs because utilizing low-coverage TGS data. HyLight achieves an average improvement of 19.05% in preserving strain identity and demonstrates near-complete strain awareness across diverse datasets. In summary, HyLight offers considerable advances in metagenome assembly, insofar as it delivers significantly enhanced strain awareness, contiguity, and accuracy without the typical compromises observed in existing approaches.}, }
@article {pmid39375020, year = {2024}, author = {Garritano, AN and Zhang, Z and Jia, Y and Allen, MA and Hill, LJ and Kuzhiumparambil, U and Hinkley, C and Raina, JB and Peixoto, RS and Thomas, T}, title = {Simple Porifera holobiont reveals complex interactions between the host, an archaeon, a bacterium, and a phage.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39375020}, issn = {1751-7370}, support = {BAS/1/1095-01-01//ANP R&amp;D levy as "Compromisso de Investimentos com Pesquisa e Desenvolvimento"/ ; }, mesh = {*Symbiosis ; *Archaea/metabolism/genetics ; Animals ; *Bacteriophages/physiology/genetics ; *Porifera/microbiology ; *Bacteria/metabolism/genetics/classification ; Ammonia/metabolism ; Microbiota ; Phylogeny ; Vitamin B 12/metabolism ; }, abstract = {The basal metazoan phylum Porifera (sponges) is increasingly used as a model to investigate ecological and evolutionary features of microbe-animal symbioses. However, sponges often host complex microbiomes, which has hampered our understanding of their interactions with their microbial symbionts. Here, we describe the discovery and characterization of the simplest sponge holobiont reported to date, consisting of the deep-sea glass sponge Aphrocallistes beatrix and two newly-described microbial symbionts: an autotrophic ammonia-oxidizing archaeon and a bacterial heterotroph. Omics analyses and metabolic modeling revealed the dependency of the ammonia-oxidizing archaea on sponge-derived ammonia to drive primary production, which in turn supports the bacterium's growth by providing the dicarboxylate fumarate. Furthermore, virus-mediated archaeal lysis appears crucial to overcome the bacterium's vitamin B12 auxotrophy. These findings reveal that the exchanges of vitamin B12 and dicarboxylate may be evolutionarily conserved features of symbiosis as they can also be found in interactions between free-living marine bacteria, and between microbes and plants or diatoms.}, }
@article {pmid39375018, year = {2024}, author = {Yang, Q and Zhong, Y and Feng, SW and Wen, P and Wang, H and Wu, J and Yang, S and Liang, JL and Li, D and Yang, Q and Tam, NFY and Peng, P}, title = {Temporal enrichment of comammox Nitrospira and Ca. Nitrosocosmicus in a coastal plastisphere.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39375018}, issn = {1751-7370}, support = {42&#x2009;077&#x2009;285//National Natural Science Foundation of China/ ; 2024A04J6534//Science and Technology Projects of Guangzhou/ ; ZDYF2023SHFZ171//Key Research and Development Program of Hainan Province/ ; 2023B1212060049//Guangdong Foundation for Program of Science and Technology Research/ ; 2023B0303000007//Guangdong Major Project of Basic and Applied Basic Research/ ; SKLOG2024-01//State Key Laboratory of Organic Geochemistry/ ; }, mesh = {*RNA, Ribosomal, 16S/genetics ; *Seawater/microbiology ; *Ammonia/metabolism ; *Nitrification ; Microbiota ; Bacteria/classification/genetics/metabolism/isolation &amp; purification ; Oxidation-Reduction ; Phylogeny ; Archaea/metabolism/genetics/classification/isolation &amp; purification ; Metagenome ; }, abstract = {Plastic marine debris is known to harbor a unique microbiome (termed the "plastisphere") that can be important in marine biogeochemical cycles. However, the temporal dynamics in the plastisphere and their implications for marine biogeochemistry remain poorly understood. Here, we characterized the temporal dynamics of nitrifying communities in the plastisphere of plastic ropes exposed to a mangrove intertidal zone. The 39-month colonization experiment revealed that the relative abundances of Nitrospira and Candidatus Nitrosocosmicus representatives increased over time according to 16S rRNA gene amplicon sequencing analysis. The relative abundances of amoA genes in metagenomes implied that comammox Nitrospira were the dominant ammonia oxidizers in the plastisphere, and their dominance increased over time. The relative abundances of two metagenome-assembled genomes of comammox Nitrospira also increased with time and positively correlated with extracellular polymeric substances content of the plastisphere but negatively correlated with NH4+ concentration in seawater, indicating the long-term succession of these two parameters significantly influenced the ammonia-oxidizing community in the coastal plastisphere. At the end of the colonization experiment, the plastisphere exhibited high nitrification activity, leading to the release of N2O (2.52 ng N2O N g-1) in a 3-day nitrification experiment. The predicted relative contribution of comammox Nitrospira to N2O production (17.9%) was higher than that of ammonia-oxidizing bacteria (4.8%) but lower than that of ammonia-oxidizing archaea (21.4%). These results provide evidence that from a long-term perspective, some coastal plastispheres will become dominated by comammox Nitrospira and thereby act as hotspots of ammonia oxidation and N2O production.}, }
@article {pmid39374753, year = {2024}, author = {Pushkareva, E and Hejduková, E and Elster, J and Becker, B}, title = {Microbial response to seasonal variation in arctic biocrusts with a focus on fungi and cyanobacteria.}, journal = {Environmental research}, volume = {263}, number = {Pt 2}, pages = {120110}, doi = {10.1016/j.envres.2024.120110}, pmid = {39374753}, issn = {1096-0953}, mesh = {Arctic Regions ; *Seasons ; *Cyanobacteria/genetics ; *Fungi/genetics/classification ; *Microbiota ; Ecosystem ; }, abstract = {Biocrusts are crucial components of Arctic ecosystems, playing significant roles in carbon and nitrogen cycling, especially in regions where plant growth is limited. However, the microbial communities within Arctic biocrusts and their strategies for surviving the harsh conditions remain poorly understood. In this study, the microbial profiles of Arctic biocrusts across different seasons (summer, autumn, and winter) were investigated in order to elucidate their survival strategies in extreme conditions. Metagenomic and metatranscriptomic analyses revealed significant differences in microbial community composition among the sites located in different elevations. The bacterial communities were dominated by Actinobacteria and Proteobacteria, while the fungal communities were mainly represented by Ascomycota and Basidiomycota, with lichenized and saprotrophic traits prevailing. Cyanobacteria were primarily composed of heterocystous cyanobacteria. Furthermore, the study identified molecular mechanisms underlying cold adaptation, including the expression of heat shock proteins and cold-inducible RNA helicases in cyanobacteria and fungi. Overall, the microbial communities appear to be permanently well adapted to the extreme environment.}, }
@article {pmid39373498, year = {2024}, author = {Ojeda, A and Akinsuyi, O and McKinley, KL and Xhumari, J and Triplett, EW and Neu, J and Roesch, LFW}, title = {Increased antibiotic resistance in preterm neonates under early antibiotic use.}, journal = {mSphere}, volume = {9}, number = {10}, pages = {e0028624}, pmid = {39373498}, issn = {2379-5042}, support = {//Little Giraffe Foundation (LGF)/ ; }, mesh = {Female ; Humans ; Infant, Newborn ; Male ; *Anti-Bacterial Agents/pharmacology/therapeutic use ; *Bacteria/drug effects/genetics/classification ; Drug Resistance, Bacterial/genetics ; Drug Resistance, Microbial/genetics ; *Feces/microbiology ; *Gastrointestinal Microbiome/drug effects/genetics ; *Infant, Premature ; *Metagenomics ; Retrospective Studies ; }, abstract = {UNLABELLED: The standard use of antibiotics in newborns to empirically treat early-onset sepsis can adversely affect the neonatal gut microbiome, with potential long-term health impacts. Research into the escalating issue of antimicrobial resistance in preterm infants and antibiotic practices in neonatal intensive care units is limited. A deeper understanding of the effects of early antibiotic intervention on antibiotic resistance in preterm infants is crucial. This retrospective study employed metagenomic sequencing to evaluate antibiotic resistance genes (ARGs) in the meconium and subsequent stool samples of preterm infants enrolled in the Routine Early Antibiotic Use in Symptomatic Preterm Neonates study. Microbial metagenomics was conducted using a subset of fecal samples from 30 preterm infants for taxonomic profiling and ARG identification. All preterm infants exhibited ARGs, with 175 unique ARGs identified, predominantly associated with beta-lactam, tetracycline, and aminoglycoside resistance. Notably, 23% of ARGs was found in preterm infants without direct or intrapartum antibiotic exposure. Post-natal antibiotic exposure increases beta-lactam/tetracycline resistance while altering mechanisms that aid bacteria in withstanding antibiotic pressure. Microbial profiling revealed 774 bacterial species, with antibiotic-naive infants showing higher alpha diversity (P = 0.005) in their microbiota and resistome compared with treated infants, suggesting a more complex ecosystem. High ARG prevalence in preterm infants was observed irrespective of direct antibiotic exposure and intensifies with age. Prolonged membrane ruptures and maternal antibiotic use during gestation and delivery are linked to alterations in the preterm infant resistome and microbiome, which are pivotal in shaping the ARG profiles in the neonatal gut.This study is registered with ClinicalTrials.gov as NCT02784821.<br><br>IMPORTANCE: A high burden of antibiotic resistance in preterm infants poses significant challenges to neonatal health. The presence of antibiotic resistance genes, along with alterations in signaling, energy production, and metabolic mechanisms, complicates treatment strategies for preterm infants, heightening the risk of ineffective therapy and exacerbating outcomes for these vulnerable neonates. Despite not receiving direct antibiotic treatment, preterm infants exhibit a concerning prevalence of antibiotic-resistant bacteria. This underscores the complex interplay of broader influences, including maternal antibiotic exposure during and beyond pregnancy and gestational complications like prolonged membrane ruptures. Urgent action, including cautious antibiotic practices and enhanced antenatal care, is imperative to protect neonatal health and counter the escalating threat of antimicrobial resistance in this vulnerable population.}, }
@article {pmid39369676, year = {2024}, author = {Zhuang, Y and Liu, S and Xiao, J and Chen, T and Gao, D and Xu, Y and Jiang, W and Wang, J and Hou, G and Li, S and Zhao, X and Huang, Y and Li, S and Zhang, S and Li, M and Wang, W and Li, S and Cao, Z}, title = {Metagenomics reveals the characteristics and potential spread of microbiomes and virulence factor genes in the dairy cattle production system.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {136005}, doi = {10.1016/j.jhazmat.2024.136005}, pmid = {39369676}, issn = {1873-3336}, mesh = {Animals ; Cattle ; *Virulence Factors/genetics ; *Metagenomics ; *Feces/microbiology ; *Dairying ; Microbiota ; Female ; Colostrum/microbiology ; Soil Microbiology ; Wastewater/microbiology ; Rumen/microbiology ; }, abstract = {Virulence factor genes (VFGs) pose a potential threat to ecological security and animal health, and have attracted increasing attention in the livestock industry. As one of the primary livestock types, dairy cattle may be an important source of VFG transmission. However, the distribution, transmission, and evolution of VFGs in the gastrointestinal tract and surrounding environment of dairy cattle remain unclear. In the present study, a total of 263 samples were collected from cows, calves, colostrum, farm wastewater, and soil. Metagenomics was conducted to analyze changes in the microbiome and VFGs characteristics in these ecological niches. The VFGs of the cows showed distinct differences between the rumen and feces, and were influenced by the region. The dominant VFG hosts was regulated by their microbial structure. Colostrum administration of cows increased VFG abundance in their newborn calf feces sharply and Enterobacteriaceae became the primary host. While diet was the primary driving force for the temporal variation in calf VFGs. For samples of the surrounding environment, water and soil had higher VFG concentrations and were more structurally stable. Moreover, extensive interactions between the mobile genetic elements and VFGs and gene mobile analysis map based on metagenomic binning both displayed the potential horizontal transfer ability of VFGs in the cows and environment. Our study revealed the prevalence, diffusion, and regulatory factors of VFGs in dairy cattle production systems, providing novel insights into reducing livestock VFGs and limiting their spread.}, }
@article {pmid39369255, year = {2024}, author = {Figueroa-Gonzalez, PA and Bornemann, TLV and Hinzke, T and Maaß, S and Trautwein-Schult, A and Starke, J and Moore, CJ and Esser, SP and Plewka, J and Hesse, T and Schmidt, TC and Schreiber, U and Bor, B and Becher, D and Probst, AJ}, title = {Metaproteogenomics resolution of a high-CO2 aquifer community reveals a complex cellular adaptation of groundwater Gracilibacteria to a host-dependent lifestyle.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {194}, pmid = {39369255}, issn = {2049-2618}, support = {CRC 1439/1 426547801//German Research Foundation (DFG)/ ; }, mesh = {*Groundwater/microbiology ; Carbon Dioxide/metabolism ; Metagenomics ; Bacteria/genetics/classification/isolation &amp; purification/metabolism ; Germany ; Genome, Bacterial ; Phylogeny ; Microbiota/genetics ; Proteogenomics ; Adaptation, Physiological ; Proteomics ; }, abstract = {BACKGROUND: Bacteria of the candidate phyla radiation (CPR), constituting about 25% of the bacterial biodiversity, are characterized by small cell size and patchy genomes without complete key metabolic pathways, suggesting a symbiotic lifestyle. Gracilibacteria (BD1-5), which are part of the CPR branch, possess alternate coded genomes and have not yet been cultivated. The lifestyle of Gracilibacteria, their temporal dynamics, and activity in natural ecosystems, particularly in groundwater, has remained largely unexplored. Here, we aimed to investigate Gracilibacteria activity in situ and to discern their lifestyle based on expressed genes, using the metaproteogenome of Gracilibacteria as a function of time in the cold-water geyser Wallender Born in the Volcanic Eifel region in Germany.<br><br>RESULTS: We coupled genome-resolved metagenomics and metaproteomics to investigate a cold-water geyser microbial community enriched in Gracilibacteria across a 12-day time-series. Groundwater was collected and sequentially filtered to fraction CPR and other bacteria. Based on 725 Gbps of metagenomic data, 1129 different ribosomal protein S3 marker genes, and 751 high-quality genomes (123 population genomes after dereplication), we identified dominant bacteria belonging to Gallionellales and Gracilibacteria along with keystone microbes, which were low in genomic abundance but substantially contributing to proteomic abundance. Seven high-quality Gracilibacteria genomes showed typical limitations, such as limited amino acid or nucleotide synthesis, in their central metabolism but no co-occurrence with potential hosts. The genomes of these Gracilibacteria were encoded for a high number of proteins involved in cell to cell interaction, supporting the previously surmised host-dependent lifestyle, e.g., type IV and type II secretion system subunits, transporters, and features related to cell motility, which were also detected on protein level.<br><br>CONCLUSIONS: We here identified microbial keystone taxa in a high-CO2 aquifer, and revealed microbial dynamics of Gracilibacteria. Although Gracilibacteria in this ecosystem did not appear to target specific organisms in this ecosystem due to lack of co-occurrence despite enrichment on 0.2-&#xb5;m filter fraction, we provide proteomic evidence for the complex machinery behind the host-dependent lifestyle of groundwater Gracilibacteria. Video Abstract.}, }
@article {pmid39368785, year = {2025}, author = {Malan-Müller, S and Martín-Hernández, D and Caso, JR and Matthijnssens, J and Rodríguez-Urrutia, A and Lowry, CA and Leza, JC}, title = {Metagenomic symphony of the intestinal ecosystem: How the composition affects the mind.}, journal = {Brain, behavior, and immunity}, volume = {123}, number = {}, pages = {510-523}, doi = {10.1016/j.bbi.2024.09.033}, pmid = {39368785}, issn = {1090-2139}, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; Brain-Gut Axis/physiology ; Neurodegenerative Diseases/microbiology ; Metagenomics/methods ; Mental Disorders/microbiology/metabolism ; Animals ; Probiotics ; Mental Health ; Brain/metabolism/physiology ; Bacteria/metabolism ; Metagenome ; }, abstract = {Mental health disorders and neurodegenerative diseases place a heavy burden on patients and societies, and, although great strides have been made to understand the pathophysiology of these conditions, advancement in drug development is lagging. The importance of gastrointestinal health in maintaining overall health and preventing disease is not a new concept. Hundreds of years ago, healers from various cultures and civilizations recognized the crucial role of the gut in sustaining health. More than a century ago, scientists began exploring the restorative effects of probiotics, marking the early recognition of the importance of gut microbes. The omics era brought more enlightenment and enabled researchers to identify the complexity of the microbial ecosystems we harbour, encompassing bacteria, eukaryotes (including fungi), archaea, viruses, and other microorganisms. The extensive genetic capacity of the microbiota is dynamic and influenced by the environment. The microbiota therefore serves as a significant entity within us, with evolutionarily preserved functions in host metabolism, immunity, development, and behavior. The significant role of the bacterial gut microbiome in mental health and neurodegenerative disorders has been realized and described within the framework of the microbiota-gut-brain axis. However, the bacterial members do not function unaccompanied, but rather in concert, and there is a substantial knowledge gap regarding the involvement of non-bacterial microbiome members in these disorders. In this review, we will explore the current literature that implicates a role for the entire metagenomic ensemble, and how their complex interkingdom relationships could influence CNS functioning in mental health disorders and neurodegenerative diseases.}, }
@article {pmid39368784, year = {2024}, author = {McCoubrey, LE and Shen, C and Mwasambu, S and Favaron, A and Sangfuang, N and Thomaidou, S and Orlu, M and Globisch, D and Basit, AW}, title = {Characterising and preventing the gut microbiota's inactivation of trifluridine, a colorectal cancer drug.}, journal = {European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences}, volume = {203}, number = {}, pages = {106922}, doi = {10.1016/j.ejps.2024.106922}, pmid = {39368784}, issn = {1879-0720}, mesh = {*Trifluridine/pharmacology ; Humans ; *Gastrointestinal Microbiome/drug effects ; *Colorectal Neoplasms/drug therapy/microbiology/prevention &amp; control ; *Feces/microbiology ; *Uridine/pharmacology/analogs &amp; derivatives/metabolism ; Antineoplastic Agents/pharmacology ; Male ; Female ; Clostridium perfringens/drug effects ; Adult ; Colon/microbiology/metabolism/drug effects ; Middle Aged ; }, abstract = {The gut microbiome can metabolise hundreds of drugs, potentially affecting their bioavailability and pharmacological effect. As most gut bacteria reside in the colon, drugs that reach the colon in significant proportions may be most impacted by microbiome metabolism. In this study the anti-colorectal cancer drug trifluridine was used as a model drug for characterising metabolism by the colonic microbiota, identifying correlations between bacterial species and individuals' rates of microbiome drug inactivation, and developing strategies to prevent drug inactivation following targeted colonic delivery. High performance liquid chromatography and ultra-high performance liquid chromatography coupled with high resolution tandem mass spectrometry demonstrated trifluridine's variable and multi-route metabolism by the faecal microbiota sourced from six healthy humans. Here, four drug metabolites were linked to the microbiome for the first time. Metagenomic sequencing of the human microbiota samples revealed their composition, which facilitated prediction of individual donors' microbial trifluridine inactivation. Notably, the abundance of Clostridium perfringens strongly correlated with the extent of trifluridine inactivation by microbiota samples after 2 hours (R[2] = 0.8966). Finally, several strategies were trialled for the prevention of microbial trifluridine metabolism. It was shown that uridine, a safe and well-tolerated molecule, significantly reduced the microbiota's metabolism of trifluridine by acting as a competitive enzyme inhibitor. Further, uridine was found to provide prebiotic effects. The findings in this study greatly expand knowledge on trifluridine's interactions with the gut microbiome and provide valuable insights for investigating the microbiome metabolism of other drugs. The results demonstrate how protection strategies could enhance the colonic stability of microbiome-sensitive drugs.}, }
@article {pmid39368512, year = {2024}, author = {Niu, X and Lin, L and Zhang, T and An, X and Li, Y and Yu, Y and Hong, M and Shi, H and Ding, L}, title = {Research on antibiotic resistance genes in wild and artificially bred green turtles (Chelonia mydas).}, journal = {The Science of the total environment}, volume = {954}, number = {}, pages = {176716}, doi = {10.1016/j.scitotenv.2024.176716}, pmid = {39368512}, issn = {1879-1026}, mesh = {*Turtles/microbiology/genetics ; Animals ; *Drug Resistance, Microbial/genetics ; Bacteria/genetics ; Anti-Bacterial Agents/pharmacology ; Gastrointestinal Microbiome/drug effects/genetics ; Drug Resistance, Bacterial/genetics ; Genes, Bacterial ; }, abstract = {Sea turtles, vital to marine ecosystems, face population decline. Artificial breeding is a recovery strategy, yet it risks introducing antibiotic resistance genes (ARGs) to wild populations and ecosystems. This study employed metagenomic techniques to compare the distribution characteristics of ARGs in the guts of wild and artificially bred green turtles (Chelonia mydas). The findings revealed that the total abundance of ARGs in C. mydas that have been artificially bred was significantly higher than that in wild individuals. Additionally, the abundance of mobile genetic elements (MGEs) co-occurring with ARGs in artificially bred C. mydas was significantly higher than in wild C. mydas. In the analysis of bacteria carrying ARGs, wild C. mydas exhibited greater bacterial diversity. Furthermore, in artificially bred C. mydas, we discovered 23 potential human pathogenic bacteria (HPB) that contain antibiotic resistance genes. In contrast, in wild C. mydas, only one type of HPB carrying an antibiotic resistance gene was found. The findings of this study not only enhance our understanding of the distribution and dissemination of ARGs within the gut microbial communities of C. mydas, but also provide vital information for assessing the potential impact of releasing artificially bred C. mydas on the spread of antibiotic resistance.}, }
@article {pmid39368509, year = {2024}, author = {Wen, M and Liu, Y and Yang, C and Dou, Y and Zhu, S and Tan, G and Wang, J}, title = {Effects of manure and nitrogen fertilization on soil microbial carbon fixation genes and associated communities in the Loess Plateau of China.}, journal = {The Science of the total environment}, volume = {954}, number = {}, pages = {176581}, doi = {10.1016/j.scitotenv.2024.176581}, pmid = {39368509}, issn = {1879-1026}, mesh = {*Soil Microbiology ; *Fertilizers ; China ; *Nitrogen/analysis ; *Soil/chemistry ; *Carbon Cycle ; *Manure ; *Carbon/analysis ; Bacteria/genetics ; Agriculture/methods ; Microbiota ; }, abstract = {The effects of long-term fertilization on soil carbon (C) cycling have been a key focus of agricultural sustainable development research. However, the influences of different fertilization treatments on soil microbial C fixation profiles are still unclear. Metagenomics technology and multivariate analysis were employed to inquire changes in soil properties, soil microbial C fixation genes and associated bacterial communities, and the influence of dominant soil properties on C fixation genes. The contents of soil C and nitrogen fractions were signicficantly higher in manure or combined with nitrogen fertilization (NM) than other treatments. The composition of soil microbial C fixation genes and associated bacterial communities varied among different fertilization treatments. Compared with other treatments, the total abundance of microbial C fixation genes and the abundance of Proteobacteria were significantly higher in NM than in other treatments, as well as the abundances of C fixation genes involved in dicarboxylate/4-hydroxybutyrate cycle and reductive citrate cycle. Key functional genes and main bacterial communities presented in the middle of the co-occurrence network. Soil organic carbon, total nitrogen, and microbial biomass nitrogen were the dominant soil properties influencing microbial C fixation genes and associated bacterial communitis. Fertilization increased the abundance of C fixation genes by affecting the changes in bacterial communities abundance mediated by soil properties. Overall, elucidating the responses of soil microbial C fixation genes and associated communities to different fertilization will enhance our understanding of the processes of soil C fixation in farmland.}, }
@article {pmid39367927, year = {2024}, author = {Wang, Q and Wang, M and Chen, Y and Miao, Q and Jin, W and Ma, Y and Pan, J and Hu, B}, title = {Deciphering microbiome and fungi-bacteria interactions in chronic wound infections using metagenomic sequencing.}, journal = {European journal of clinical microbiology &amp; infectious diseases : official publication of the European Society of Clinical Microbiology}, volume = {43}, number = {12}, pages = {2383-2396}, pmid = {39367927}, issn = {1435-4373}, support = {20YF1407700//Science and Technology Innovation Plan Of Shanghai Science and Technology Commission/ ; }, mesh = {Humans ; Male ; Female ; *Wound Infection/microbiology ; Middle Aged ; *Fungi/classification/genetics/isolation &amp; purification ; Aged ; *Metagenomics/methods ; *Bacteria/classification/genetics/isolation &amp; purification ; *Microbiota/genetics ; *High-Throughput Nucleotide Sequencing ; Chronic Disease ; Adult ; Microbial Interactions ; Mycobiome/genetics ; Aged, 80 and over ; }, abstract = {PURPOSE: Chronic wounds caused by infections impose a considerable global healthcare burden. The microbial features of these infections and possible correlations between bacteria and fungi may influence wound healing. However, metagenomic next-generation sequencing (mNGS) analyses of these features remain sparse. Therefore, we performed mNGS on chronic wound infection samples to investigate features and correlations between the bacteriome and mycobiome in 66 patients (28: chronic wounds; 38: non-chronic wounds).<br><br>METHODS: Microbial community characteristics in patients with wound infections, microbiome-systemic inflammation associations, and bacteria-fungi correlations were analyzed.<br><br>RESULTS: Infections constituted the primary cause of wounds in this study. Nontuberculous mycobacteria (23%) and Mycobacterium tuberculosis (13%) were the most common pathogens associated with chronic wounds, whereas Staphylococcus aureus (15%) was the most prevalent in non-chronic wound infections. Patients with chronic wound infections had a higher abundance of Pseudomonas aeruginosa than those without chronic wounds. Microbes with a high relative abundance in chronic wound infections were less significantly associated with plasma inflammatory factors than those in non-chronic wound infections. Additionally, a positive correlation between Candida glabrata and P. aeruginosa and an association between Malassezia restricta and anaerobic species were detected in patients with chronic wound infections.<br><br>CONCLUSION: Our results further support the hypothesis that P. aeruginosa is a microbial biomarker of chronic wound infection regardless of the causative pathogens. Moreover, we propose a positive correlation between C. glabrata and P. aeruginosa in chronic wound infections, which advances the current understanding of fungi-bacteria correlations in patients with chronic wound infections.}, }
@article {pmid39367431, year = {2024}, author = {Gaber, M and Wilson, AS and Millen, AE and Hovey, KM and LaMonte, MJ and Wactawski-Wende, J and Ochs-Balcom, HM and Cook, KL}, title = {Visceral adiposity in postmenopausal women is associated with a pro-inflammatory gut microbiome and immunogenic metabolic endotoxemia.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {192}, pmid = {39367431}, issn = {2049-2618}, support = {W81XWH-20-1-0014//Congressionally Directed Medical Research Programs/ ; W81XWH-20-1-0014//Congressionally Directed Medical Research Programs/ ; W81XWH-20-1-0014//Congressionally Directed Medical Research Programs/ ; R01 DE013505, R01 DE024523/DE/NIDCR NIH HHS/United States ; R01 DE013505, R01 DE024523/DE/NIDCR NIH HHS/United States ; R01 DE013505, R01 DE024523/DE/NIDCR NIH HHS/United States ; R01 DE013505, R01 DE024523/DE/NIDCR NIH HHS/United States ; R01 DE013505, R01 DE024523/DE/NIDCR NIH HHS/United States ; HHSN268201600018C, HHSN268201600001C, HHSN268201600002C, HHSN268201600003C, and HHSN268201600004C/HL/NHLBI NIH HHS/United States ; HHSN268201600018C, HHSN268201600001C, HHSN268201600002C, HHSN268201600003C, and HHSN268201600004C/HL/NHLBI NIH HHS/United States ; }, mesh = {Female ; *Gastrointestinal Microbiome/drug effects ; *Endotoxemia/immunology/microbiology ; Humans ; *Postmenopause ; Animals ; Aged ; Mice ; *Lipopolysaccharides ; Intra-Abdominal Fat/metabolism/immunology ; Inflammation ; Aged, 80 and over ; Mice, Inbred C57BL ; Adiposity ; Bacteria/classification/isolation &amp; purification/metabolism/genetics ; Acute-Phase Proteins/metabolism ; Feces/microbiology ; Obesity, Abdominal/microbiology/immunology ; Absorptiometry, Photon ; Carrier Proteins ; Membrane Glycoproteins ; }, abstract = {BACKGROUND: Obesity, and in particular abdominal obesity, is associated with an increased risk of developing a variety of chronic diseases. Obesity, aging, and menopause are each associated with differential shifts in the gut microbiome. Obesity causes chronic low-grade inflammation due to increased lipopolysaccharide (LPS) levels which is termed "metabolic endotoxemia." We examined the association of visceral adiposity tissue (VAT) area, circulating endotoxemia markers, and the gut bacterial microbiome in a cohort of aged postmenopausal women.<br><br>METHODS: Fifty postmenopausal women (mean age 78.8&#x2009;&#xb1;&#x2009;5.3&#xa0;years) who had existing adipose measurements via dual x-ray absorptiometry (DXA) were selected from the extremes of VAT: n&#x2009;=&#x2009;25 with low VAT area (45.6&#x2009;&#xb1;&#x2009;12.5 cm[2]) and n&#x2009;=&#x2009;25 with high VAT area (177.5&#x2009;&#xb1;&#x2009;31.3 cm[2]). Dietary intake used to estimate the Healthy Eating Index (HEI) score was assessed with a food frequency questionnaire. Plasma LPS, LPS-binding protein (LBP), anti-LPS antibodies, anti-flagellin antibodies, and anti-lipoteichoic acid (LTA) antibodies were measured by ELISA. Metagenomic sequencing was performed on fecal DNA. Female C57BL/6 mice consuming a high-fat or low-fat diet were treated with 0.4&#xa0;mg/kg diet-derived fecal isolated LPS modeling metabolic endotoxemia, and metabolic outcomes were measured after 6&#xa0;weeks.<br><br>RESULTS: Women in the high VAT group showed increased Proteobacteria abundance and a lower Firmicutes/Bacteroidetes ratio. Plasma LBP concentration was positively associated with VAT area. Plasma anti-LPS, anti-LTA, and anti-flagellin IgA antibodies were significantly correlated with adiposity measurements. Women with high VAT showed significantly elevated LPS-expressing bacteria compared to low VAT women. Gut bacterial species that showed significant associations with both adiposity and inflammation (anti-LPS IgA and LBP) were Proteobacteria (Escherichia coli, Shigella spp., and Klebsiella spp.) and Veillonella atypica. Healthy eating index (HEI) scores negatively correlated with % body fat and anti-LPS IgA antibodies levels. Preclinical murine model showed that high-fat diet-fed mice administered a low-fat diet fecal-derived LPS displayed reduced body weight, decreased % body fat, and improved glucose tolerance test parameters when compared with saline-injected or high-fat diet fecal-derived LPS-treated groups consuming a high-fat diet.<br><br>CONCLUSIONS: Increased VAT in postmenopausal women is associated with elevated gut Proteobacteria abundance and immunogenic metabolic endotoxemia markers. Low-fat diet-derived fecal-isolated LPS improved metabolic parameters in high-fat diet-fed mice giving mechanistic insights into potential pro-health signaling mediated by under-acylated LPS isoforms. Video Abstract.}, }
@article {pmid39367251, year = {2024}, author = {Zheng, J and Sun, Q and Zhang, M and Liu, C and Su, Q and Zhang, L and Xu, Z and Lu, W and Ching, J and Tang, W and Cheung, CP and Hamilton, AL and Wilson O'Brien, AL and Wei, SC and Bernstein, CN and Rubin, DT and Chang, EB and Morrison, M and Kamm, MA and Chan, FKL and Zhang, J and Ng, SC}, title = {Noninvasive, microbiome-based diagnosis of inflammatory bowel disease.}, journal = {Nature medicine}, volume = {30}, number = {12}, pages = {3555-3567}, pmid = {39367251}, issn = {1546-170X}, support = {R4030-22//Research Grants Council, University Grants Committee (RGC, UGC)/ ; 14121322//Research Grants Council, University Grants Committee (RGC, UGC)/ ; 2017PG-IBD003//Leona M. and Harry B. Helmsley Charitable Trust (Helmsley Charitable Trust)/ ; 10210816//Food and Health Bureau of the Government of the Hong Kong Special Administrative Region | Health and Medical Research Fund (HMRF)/ ; 82100573//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Humans ; *Feces/microbiology ; *Inflammatory Bowel Diseases/microbiology/diagnosis ; *Crohn Disease/microbiology/diagnosis ; *Gastrointestinal Microbiome/genetics ; *Biomarkers ; *Colitis, Ulcerative/microbiology/diagnosis ; Female ; Male ; Adult ; Leukocyte L1 Antigen Complex/analysis/metabolism ; Bacteria/genetics/isolation &amp; purification ; Metagenomics/methods ; Middle Aged ; Case-Control Studies ; Microbiota/genetics ; }, abstract = {Despite recent progress in our understanding of the association between the gut microbiome and inflammatory bowel disease (IBD), the role of microbiome biomarkers in IBD diagnosis remains underexplored. Here we developed a microbiome-based diagnostic test for IBD. By utilization of metagenomic data from 5,979 fecal samples with and without IBD from different geographies and ethnicities, we identified microbiota alterations in IBD and selected ten and nine bacterial species for construction of diagnostic models for ulcerative colitis and Crohn's disease, respectively. These diagnostic models achieved areas under the curve >0.90 for distinguishing IBD from controls in the discovery cohort, and maintained satisfactory performance in transethnic validation cohorts from eight populations. We further developed a multiplex droplet digital polymerase chain reaction test targeting selected IBD-associated bacterial species, and models based on this test showed numerically higher performance than fecal calprotectin in discriminating ulcerative colitis and Crohn's disease from controls. Here we discovered universal IBD-associated bacteria and show the potential applicability of a multibacteria biomarker panel as a noninvasive tool for IBD diagnosis.}, }
@article {pmid39367018, year = {2024}, author = {Baldi, A and Braat, S and Hasan, MI and Bennett, C and Barrios, M and Jones, N and Abdul Azeez, I and Wilcox, S and Roy, PK and Bhuiyan, MSA and Ataide, R and Clucas, D and Larson, LM and Hamadani, J and Zimmermann, M and Bowden, R and Jex, A and Biggs, BA and Pasricha, SR}, title = {Effects of iron supplements and iron-containing micronutrient powders on the gut microbiome in Bangladeshi infants: a randomized controlled trial.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8640}, pmid = {39367018}, issn = {2041-1723}, support = {GNT1158696//Department of Health | National Health and Medical Research Council (NHMRC)/ ; GNT2009047//Department of Health | National Health and Medical Research Council (NHMRC)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects/genetics ; Infant ; Bangladesh ; *Dietary Supplements ; *Micronutrients/administration &amp; dosage ; Female ; *Iron/metabolism/administration &amp; dosage ; Male ; *RNA, Ribosomal, 16S/genetics ; *Powders ; Diarrhea/microbiology ; Feces/microbiology ; Anemia, Iron-Deficiency/microbiology ; }, abstract = {Anemia is highly prevalent globally, especially in young children in low-income countries, where it often overlaps with a high burden of diarrheal disease. Distribution of iron interventions (as supplements or iron-containing multiple micronutrient powders, MNPs) is a key anemia reduction strategy. Small studies in Africa indicate iron may reprofile the gut microbiome towards pathogenic species. We seek to evaluate the safety of iron and MNPs based on their effects on diversity, composition, and function of the gut microbiome in children in rural Bangladesh as part of a large placebo-controlled randomized controlled trial of iron or MNPs given for 3 months (ACTRN12617000660381). In 923 infants, we evaluate the microbiome before, immediately following, and nine months after interventions, using 16S rRNA gene sequencing and shotgun metagenomics in a subset. We identify no increase in diarrhea with either treatment. In our primary analysis, neither iron nor MNPs alter gut microbiome diversity or composition. However, when not adjusting for multiple comparisons, compared to placebo, children receiving iron and MNPs exhibit reductions in commensal species (e.g., Bifidobacterium, Lactobacillus) and increases in potential pathogens, including Clostridium. These increases are most evident in children with baseline iron repletion and are further supported by trend-based statistical analyses.}, }
@article {pmid39365058, year = {2024}, author = {Corbett, GA and Moore, R and Feehily, C and Killeen, SL and O'Brien, E and Van Sinderen, D and Matthews, E and O'Flaherty, R and Rudd, PM and Saldova, R and Walsh, CJ and Lawton, EM and MacIntyre, DA and Corcoran, S and Cotter, PD and McAuliffe, FM}, title = {Dietary amino acids, macronutrients, vaginal birth, and breastfeeding are associated with the vaginal microbiome in early pregnancy.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0113024}, pmid = {39365058}, issn = {2165-0497}, support = {12/RC/2273//Science Foundation Ireland (SFI)/ ; 16/SP/3827//Science Foundation Ireland (SFI)/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology ; Pregnancy ; Adult ; *Amino Acids/metabolism ; *Microbiota ; *Breast Feeding ; Nutrients ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Diet ; Young Adult ; Premature Birth/microbiology ; Delivery, Obstetric ; }, abstract = {UNLABELLED: The vaginal microbiome is a key player in the etiology of spontaneous preterm birth. This study aimed to illustrate maternal environmental factors associated with vaginal microbiota composition and function in pregnancy. Women in healthy pregnancy had vaginal microbial sampling from the posterior vaginal fornix performed at 16 weeks gestation. After shotgun metagenomic sequencing, heatmaps of relative abundance data were generated. Community state type (CST) was assigned, and alpha diversity was calculated. Demography, obstetric history, well-being, exercise, and diet using food frequency questionnaires were collected and compared against microbial parameters. A total of 119 pregnant participants had vaginal metagenomic sequencing performed. Factors with strongest association with beta diversity were dietary lysine (adj-R[2] 0.113, P = 0.002), valine (adj-R[2] 0.096, P = 0.004), leucine (adj-R[2] 0.086, P = 0.003), and phenylalanine (adj-R[2] 0.085, P = 0.005, Fig. 2D). Previous vaginal delivery and breastfeeding were associated with vaginal beta diversity (adj-R[2] 0.048, P = 0.003; adj-R[2] 0.045, P = 0.004), accounting for 8.5% of taxonomy variation on redundancy analysis. Dietary fat, starch, and maltose were positively correlated with alpha diversity (fat +0.002 SD/g, P = 0.025; starch +0.002 SD/g, P = 0.043; maltose +0.440 SD/g, P = 0.013), particularly in secretor-positive women. Functional signature was associated with CST, maternal smoking, and dietary phenylalanine, accounting for 8.9%-11% of the variation in vaginal microbiome functional signature. Dietary amino acids, previous vaginal delivery, and breastfeeding history were associated with vaginal beta diversity. Functional signature of the vaginal microbiome differed with community state type, smoking, dietary phenylalanine, and vitamin K. Increased alpha diversity correlated with dietary fat and starch. These data provide a novel snapshot into the associations between maternal environment, nutrition, and the vaginal microbiome.<br><br>IMPORTANCE: This secondary analysis of the MicrobeMom randomized controlled trial reveals that dietary amino acids, macronutrients, previous vaginal birth, and breastfeeding have the strongest associations with vaginal taxonomy in early pregnancy. Function of the vaginal niche is associated mainly by species composition, but smoking, vitamin K, and phenylalanine also play a role. These associations provide an intriguing and novel insight into the association between host factors and diet on the vaginal microbiome in pregnancy and highlight the need for further investigation into the complex interactions between the diet, human gut, and vaginal microbiome.}, }
@article {pmid39365049, year = {2024}, author = {Won, S and Cho, S and Kim, H}, title = {rRNA operon improves species-level classification of bacteria and microbial community analysis compared to 16S rRNA.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0093124}, pmid = {39365049}, issn = {2165-0497}, mesh = {*RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; *Microbiota/genetics ; *rRNA Operon/genetics ; Phylogeny ; DNA, Bacterial/genetics ; Sequence Analysis, DNA/methods ; }, abstract = {UNLABELLED: Precise identification of species is fundamental in microbial genomics and is crucial for understanding the microbial communities. While the 16S rRNA gene, particularly its V3-V4 regions, has been extensively employed for microbial identification, however has limitations in achieving species-level resolution. Advancements in long-read sequencing technologies have highlighted the rRNA operon as a more accurate marker for microbial classification and analysis than the 16S rRNA gene. This study aims to compare the accuracy of species classification and microbial community analysis using the rRNA operon versus the 16S rRNA gene. We evaluated the species classification accuracy of the rRNA operon,16S rRNA gene, and 16S rRNA V3-V4 regions using a BLAST-based method and a k-mer matching-based method with public data available from NCBI. We further performed simulations to model microbial community analysis. We accessed the performance using each marker in community composition estimation and differential abundance analysis. Our findings demonstrate that the rRNA operon offers an advantage over the 16S rRNA gene and its V3-V4 regions for species-level classification within the genus. When applied to microbial community analysis, the rRNA operon enables a more accurate determination of composition. Using the rRNA operon yielded more reliable results in differential abundance analysis as well.<br><br>IMPORTANCE: We quantitatively demonstrated that the rRNA operon outperformed the 16S rRNA and its V3-V4 regions in accuracy for both individual species identification and species-level microbial community analysis. Our findings can provide guidelines for selecting appropriate markers in the field of microbial research.}, }
@article {pmid39363816, year = {2024}, author = {Sarker, S and Klukowski, N and Talukder, S and Gupta, SD and Vaughan-Higgins, R}, title = {Evidence of a highly divergent novel parvovirus in Australia's critically endangered western ground parrot/kyloring (Pezoporus flaviventris).}, journal = {Australian veterinary journal}, volume = {102}, number = {11}, pages = {570-575}, doi = {10.1111/avj.13378}, pmid = {39363816}, issn = {1751-0813}, mesh = {Animals ; *Parrots/virology ; *Endangered Species ; *Phylogeny ; *Parvoviridae Infections/veterinary/virology/epidemiology ; Australia/epidemiology ; *Feces/virology ; Parvovirus/genetics/classification/isolation &amp; purification ; Bird Diseases/virology/epidemiology ; Genome, Viral ; }, abstract = {Detecting pathogens in endangered animal populations is vital for understanding and mitigating threats to their survival. The critically endangered western ground parrot (Pezoporus flaviventris, WGP), with a population as low as 150 individuals in Australia, faces an imminent risk of extinction. Despite this urgency, research on viral pathogens in this species remains limited. This study aimed to identify and characterise viruses present in faecal samples from seven individual WGP using a viral metagenomic approach. Analysis of the sequenced datasets revealed the presence of a novel virus belonging to the Parvoviridae family, named psittaciform chaphamaparvovirus 7 (PsChPV-7). The genome of PsChPV-7 contains typical structural and functional gene sequences found in Parvoviridae but is highly divergent, indicating its classification as a distinct species. Phylogenetic analysis placed PsChPV-7 within a unique sub-clade of the Chaphamaparvovirus genus, suggesting its evolutionary significance as an ancient lineage within this group. These findings may contribute to the development of strategic management and biosecurity plans aimed at conserving this endangered WGP.}, }
@article {pmid39363651, year = {2025}, author = {Vazquez Bucheli, JE and Lee, Y and Kim, B and Azevedo, NF and Azevedo, AS and Todorov, SD and Ji, Y and Kang, H and Holzapfel, WH}, title = {Use of FISH-FLOW as a Method for the Identification and Quantification of Bacterial Populations.}, journal = {Molecular nutrition &amp; food research}, volume = {69}, number = {2}, pages = {e2400494}, doi = {10.1002/mnfr.202400494}, pmid = {39363651}, issn = {1613-4133}, support = {NRF-2018M3A9F3021964//NRF Korea/ ; RS-2023-00222687//NRF Korea/ ; 739489//Consejo Nacional de Humanidades, Ciencias y Tecnolog&#xed;as/ ; 2023/05394-9//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de S&#xe3;o Paulo/ ; LA/P/0045/2020UIDP/00511/2020,POCI-01-0145-FEDER-030431//FCT Portugal/ ; }, mesh = {*In Situ Hybridization, Fluorescence/methods ; RNA, Ribosomal, 16S/genetics ; Feces/microbiology ; Humans ; *Flow Cytometry/methods ; *Gastrointestinal Microbiome ; *Bacteria/classification/genetics/isolation &amp; purification ; Bacteroidetes/isolation &amp; purification/genetics ; Gastrointestinal Tract/microbiology ; Real-Time Polymerase Chain Reaction ; Firmicutes/isolation &amp; purification/genetics ; Actinobacteria/isolation &amp; purification/genetics ; Proteobacteria/isolation &amp; purification/genetics ; }, abstract = {The gastrointestinal tract (GIT) harbors the largest group of microbiotas among the microbial communities of the human host. The resident organisms typical of a healthy gut are well adapted to the gastrointestinal environment while alteration of these populations can trigger disorders that may affect the health and well-being of the host. Various investigations have applied different tools to study bacterial communities in the gut and their correlation with gastrointestinal disorders such as inflammatory bowel disease (IBD), obesity, and diabetes. This study proposes fluorescent in situ hybridization, combined with flow cytometry (FISH-FLOW), as an alternative approach for phylum level identification of Firmicutes, Bacteroidetes, Actinobacteria, and Proteobacteria and quantification of target bacteria from the GIT based on analysis of fecal samples, where results are validated by quantitative polymerase chain reaction (qPCR) and 16S ribosomal ribonucleic acid (16s rRNA) sequencing. The results obtained via FISH-FLOW experimental approach show high specificity for the developed probes for hybridization with the target bacteria. The study, therefore, suggests the FISH-FLOW as a reliable method for studying bacterial communities in the gut with results correlating well with those of metagenomic investigations of the same fecal samples.}, }
@article {pmid39363100, year = {2025}, author = {Chu, VT and Glascock, A and Donnell, D and Grabow, C and Brown, CE and Ward, R and Love, C and Kalantar, KL and Cohen, SE and Cannon, C and Woodworth, MH and Kelley, CF and Celum, C and Luetkemeyer, AF and Langelier, CR}, title = {Impact of doxycycline post-exposure prophylaxis for sexually transmitted infections on the gut microbiome and antimicrobial resistome.}, journal = {Nature medicine}, volume = {31}, number = {1}, pages = {207-217}, pmid = {39363100}, issn = {1546-170X}, support = {K23 AI144036/AI/NIAID NIH HHS/United States ; R01 AI182308/AI/NIAID NIH HHS/United States ; R01 AI143439/AI/NIAID NIH HHS/United States ; T32 AI007641/AI/NIAID NIH HHS/United States ; R01 HL155418/HL/NHLBI NIH HHS/United States ; K23 HL138461/HL/NHLBI NIH HHS/United States ; }, mesh = {Adult ; Female ; Humans ; Male ; Young Adult ; *Anti-Bacterial Agents/administration &amp; dosage/adverse effects ; *Doxycycline/administration &amp; dosage/adverse effects ; *Drug Resistance, Bacterial/genetics/drug effects ; *Gastrointestinal Microbiome/drug effects/genetics ; *Post-Exposure Prophylaxis/methods ; *Sexually Transmitted Diseases/microbiology/prevention &amp; control ; }, abstract = {Doxycycline post-exposure prophylaxis (doxy-PEP) reduces bacterial sexually transmitted infections among men who have sex with men and transgender women. Although poised for widespread clinical implementation, the impact of doxy-PEP on antimicrobial resistance remains a primary concern as its effects on the gut microbiome and resistome, or the antimicrobial resistance genes (ARGs) present in the gut microbiome, are unknown. To investigate these effects, we studied participants from the DoxyPEP trial, a randomized clinical trial comparing doxy-PEP use, a one-time doxycycline 200-mg dose taken after condomless sex (DP arm, n = 100), to standard of care (SOC arm, n = 50) among men who have sex with men and transgender women. From self-collected rectal swabs at enrollment (day-0) and after 6 months (month-6), we performed metagenomic DNA sequencing (DNA-seq) or metatranscriptomic RNA sequencing (RNA-seq). DNA-seq data were analyzable from 127 samples derived from 89 participants, and RNA-seq data were analyzable from 86 samples derived from 70 participants. We compared the bacterial microbiome and resistome between the two study arms and over time. The median number of doxycycline doses taken since enrollment by participants with DNA-seq data was zero (interquartile range (IQR): 0-7 doses) for the SOC arm and 42 (IQR: 27-64 doses) for the DP arm. Tetracycline ARGs were detected in all day-0 DNA-seq samples and in 85% of day-0 RNA-seq samples. The proportional mass of tetracycline ARGs in the resistome increased between day-0 and month-6 in DP participants from 46% to 51% in the metagenome (P = 2.3 × 10[-2]) and from 4% to 15% in the metatranscriptome (P = 4.5 × 10[-6]), but no statistically significant increases in other ARG classes were observed. Exposure to a higher number of doxycycline doses correlated with proportional enrichment of tetracycline ARGs in the metagenome (Spearman's ρ = 0.23, P = 9.0 × 10[-3]) and metatranscriptome (Spearman's ρ = 0.55, P = 3.7 × 10[-8]). Bacterial microbiome alpha diversity, beta diversity and total bacterial mass did not differ between day-0 and month-6 samples from DP participants when assessed by either DNA-seq or RNA-seq. In an abundance-based correlation analysis, we observed an increase over time in the strength of the correlation between tetracycline ARGs and specific bacterial taxa, including some common human pathogens. In sum, doxy-PEP use over a 6-month period was associated with an increase in the proportion of tetracycline ARGs comprising the gut resistome and an increase in the expression of tetracycline ARGs. At 6 months of doxy-PEP use, no residual differences were observed in alpha and beta diversity or taxonomic composition of the gut microbiome. As doxy-PEP is implemented as a public health strategy, further studies and population-level surveillance of doxycycline-resistant pathogens are needed to understand the implications of these findings. ClinicalTrials.gov registration number: NCT03980223 .}, }
@article {pmid39362120, year = {2024}, author = {Gao, S and Li, S and Cao, S and Zhong, H and He, Z}, title = {Disclosing the key role of Fe/As/Cu in community co-occurrence and microbial recruitment in metallurgical ruins.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {135889}, doi = {10.1016/j.jhazmat.2024.135889}, pmid = {39362120}, issn = {1873-3336}, mesh = {*Iron/metabolism ; *Microbiota/drug effects ; Metallurgy ; Arsenic/metabolism ; Mining ; Copper ; Bacteria/metabolism/genetics ; Metals, Heavy/toxicity ; Soil Microbiology ; Soil Pollutants/metabolism/toxicity ; }, abstract = {Mining activities have led to the persistent presence of substantial heavy metals at metallurgical sites. However, the impact of long-term and complex heavy metal pollution in metallurgical ruins on the structure and spatial shift of microbiome remains unclear. In this study, we focused on various types of metallurgical sites to uncover the occurrence of heavy metals in abandoned mines and the response patterns of microbial communities. The results indicate that mining activities have caused severe exceedances of multiple heavy metals, with AsBio, CuBio, and FeBio being the primary factors affecting community structure and function. Co-occurrence network analyses suggest that several genera, including Ellin6515, Cupriavidus, Acidobacteria genus RB41, Vicinamibacteraceae, Blastococcus, and Sphingomonas, may play significant roles in the synergistic metabolism of communities responding to Fe-Cu-As stress. Although random dispersal contributed to community migration, null models emphasized that variable selection predominates in the spatial turnover of community composition. Additionally, metagenomic prediction (PICRUSt2) identified key genes involved in stress and detoxification strategies of heavy metals. The composite heavy metal stress strengthened the relationship between network structure and the potential function of the community, along with critical ecosystem functions. Our findings demonstrated that microbial interactions were crucial for ecosystem management and the ecological consequences of heavy metal pollution remediation.}, }
@article {pmid39361891, year = {2024}, author = {Ramos-Barbero, MD and Gómez-Gómez, C and Vique, G and Sala-Comorera, L and Rodríguez-Rubio, L and Muniesa, M}, title = {Recruitment of complete crAss-like phage genomes reveals their presence in chicken viromes, few human-specific phages, and lack of universal detection.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39361891}, issn = {1751-7370}, mesh = {Humans ; *Bacteriophages/genetics/classification/isolation &amp; purification ; Animals ; *Genome, Viral ; *Phylogeny ; *Virome/genetics ; *Chickens/virology ; Feces/virology ; Host Specificity ; }, abstract = {The order Crassvirales, which includes the prototypical crAssphage (p-crAssphage), is predominantly associated with humans, rendering it the most abundant and widely distributed group of DNA phages in the human gut. The reported human specificity and wide global distribution of p-crAssphage makes it a promising human fecal marker. However, the specificity for the human gut as well as the geographical distribution around the globe of other members of the order Crassvirales remains unknown. To determine this, a recruitment analysis using 91 complete, non-redundant genomes of crAss-like phages in human and animal viromes revealed that only 13 crAss-like phages among the 91 phages analyzed were highly specific to humans, and p-crAssphage was not in this group. Investigations to elucidate whether any characteristic of the phages was responsible for their prevalence in humans showed that the 13 human crAss-like phages do not share a core genome. Phylogenomic analysis placed them in three independent families, indicating that within the Crassvirales group, human specificity is likely not a feature of a common ancestor but rather was introduced on separate/independent occasions in their evolutionary history. The 13 human crAss-like phages showed variable geographical distribution across human metagenomes worldwide, with some being more prevalent in certain countries than in others, but none being universally identified. The varied geographical distribution and the absence of a phylogenetic relationship among the human crAss-like phages are attributed to the emergence and dissemination of their bacterial host, the symbiotic human strains of Bacteroides, across various human populations occupying diverse ecological niches worldwide.}, }
@article {pmid39358810, year = {2024}, author = {Meng, L and Jin, H and Yulug, B and Altay, O and Li, X and Hanoglu, L and Cankaya, S and Coskun, E and Idil, E and Nogaylar, R and Ozsimsek, A and Shoaie, S and Turkez, H and Nielsen, J and Zhang, C and Borén, J and Uhlén, M and Mardinoglu, A}, title = {Multi-omics analysis reveals the key factors involved in the severity of the Alzheimer's disease.}, journal = {Alzheimer's research &amp; therapy}, volume = {16}, number = {1}, pages = {213}, pmid = {39358810}, issn = {1758-9193}, mesh = {Humans ; *Alzheimer Disease/genetics/microbiology/metabolism/blood ; *Proteomics ; Female ; Male ; Aged ; *Metabolomics/methods ; *Gastrointestinal Microbiome ; Severity of Illness Index ; Artificial Intelligence ; Aged, 80 and over ; Biomarkers/blood ; Metagenomics/methods ; Multiomics ; }, abstract = {Alzheimer's disease (AD) is a debilitating neurodegenerative disorder with a global impact, yet its pathogenesis remains poorly understood. While age, metabolic abnormalities, and accumulation of neurotoxic substances are potential risk factors for AD, their effects are confounded by other factors. To address this challenge, we first utilized multi-omics data from 87 well phenotyped AD patients and generated plasma proteomics and metabolomics data, as well as gut and saliva metagenomics data to investigate the molecular-level alterations accounting the host-microbiome interactions. Second, we analyzed individual omics data and identified the key parameters involved in the severity of the dementia in AD patients. Next, we employed Artificial Intelligence (AI) based models to predict AD severity based on the significantly altered features identified in each omics analysis. Based on our integrative analysis, we found the clinical relevance of plasma proteins, including SKAP1 and NEFL, plasma metabolites including homovanillate and glutamate, and Paraprevotella clara in gut microbiome in predicting the AD severity. Finally, we validated the predictive power of our AI based models by generating additional multi-omics data from the same group of AD patients by following up for 3 months. Hence, we observed that these results may have important implications for the development of potential diagnostic and therapeutic approaches for AD patients.}, }
@article {pmid39358791, year = {2024}, author = {Wirajana, IN and Ariantari, NP and Shyu, DJH and Vaghamshi, N and Antaliya, K and Dudhagara, P}, title = {Prokaryotic communities profiling of Indonesian hot springs using long-read Oxford Nanopore sequencing.}, journal = {BMC research notes}, volume = {17}, number = {1}, pages = {286}, pmid = {39358791}, issn = {1756-0500}, support = {B/530-4/UN14.4A/PT.01.03/2023//Udayana University International Senior Fellowship (UNISERF) grant for year 2023 (Grant Number: B/530-4/UN14.4A/PT.01.03/2023), Udayana University, Bali, Indonesia/ ; }, mesh = {*Hot Springs/microbiology ; Indonesia ; *RNA, Ribosomal, 16S/genetics ; *Nanopore Sequencing/methods ; Microbiota/genetics ; Bacteria/genetics/isolation &amp; purification/classification ; Metagenome/genetics ; Metagenomics/methods ; Water Microbiology ; Phylogeny ; DNA, Bacterial/genetics/analysis ; Sequence Analysis, DNA/methods ; }, abstract = {OBJECTIVES: Indonesia's location at the convergence of multiple tectonic plates results in a unique geomorphological feature with abundant hot springs. This study pioneers the metagenomic exploration of Indonesian hot springs, harbouring unique life forms despite high temperatures. The microbial community of hot springs is taxonomically versatile and biotechnologically valuable. 16s rRNA amplicon sequencing of the metagenome is a viable option for the microbiome investigation. This study utilized Oxford Nanopore's long-read 16 S rRNA sequencing for enhanced species identification, improved detection of rare members, and a more detailed community composition profile.<br><br>DATA DESCRIPTION: Water samples were taken from three hot springs of the Bali, Indonesia (i) Angseri, 8.362503&#xa0;S, 115.133452 E; (ii) Banjar, 8.210270&#xa0;S, 114.967063 E; and (iii) Batur, 8.228806&#xa0;S, 115.404829 E. BioLit Genomic DNA Extraction Kit (SRL, Mumbai, India) was used to isolate DNA from water samples. The quantity and quality of the DNA were determined using a NanoDrop&#x2122; spectrophotometer and a Qubit fluorometer (Thermo Fisher Scientific, USA). The library was created using Oxford Nanopore Technology kits, and the sequencing was done using Oxford Nanopore's GridION platform. All sequencing data was obtained in FASTQ files and filtered using NanoFilt software. This dataset is valuable for searching novel bacteria diversity and their existence.}, }
@article {pmid39358771, year = {2024}, author = {Kawano-Sugaya, T and Arikawa, K and Saeki, T and Endoh, T and Kamata, K and Matsuhashi, A and Hosokawa, M}, title = {A single amplified genome catalog reveals the dynamics of mobilome and resistome in the human microbiome.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {188}, pmid = {39358771}, issn = {2049-2618}, mesh = {Humans ; *Bacteria/genetics/classification ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; *Mouth/microbiology ; *Genome, Bacterial ; Interspersed Repetitive Sequences/genetics ; Microbiota/genetics ; Drug Resistance, Bacterial/genetics ; Metagenomics/methods ; Phylogeny ; }, abstract = {BACKGROUND: The increase in metagenome-assembled genomes (MAGs) has advanced our understanding of the functional characterization and taxonomic assignment within the human microbiome. However, MAGs, as population consensus genomes, often aggregate heterogeneity among species and strains, thereby obfuscating the precise relationships between microbial hosts and mobile genetic elements (MGEs). In contrast, single amplified genomes (SAGs) derived via single-cell genome sequencing can capture individual genomic content, including MGEs.<br><br>RESULTS: We introduce the first substantial SAG dataset (bbsag20) from the human oral and gut microbiome, comprising 17,202 SAGs above medium-quality without co-assembly. This collection unveils a diversity of bacterial lineages across 312 oral and 647 gut species, demonstrating different taxonomic compositions from MAGs. Moreover, the SAGs showed cellular-level evidence of the translocation of oral bacteria to the gut. We also identified broad-host-range MGEs harboring antibiotic resistance genes (ARGs), which were not detected in the MAGs.<br><br>CONCLUSIONS: The difference in taxonomic composition between SAGs and MAGs indicates that combining both methods would be effective in expanding the genome catalog. By connecting mobilomes and resistomes in individual samples, SAGs could meticulously chart a dynamic network of ARGs on MGEs, pinpointing potential ARG reservoirs and their spreading patterns in the microbial community. Video Abstract.}, }
@article {pmid39357281, year = {2024}, author = {Zhang, J and Gao, T and Chen, G and Liang, Y and Nie, X and Gu, W and Li, L and Tong, H and Huang, W and Lu, T and Bian, Z and Su, L}, title = {Vinegar-processed Schisandra Chinensis enhanced therapeutic effects on colitis-induced depression through tryptophan metabolism.}, journal = {Phytomedicine : international journal of phytotherapy and phytopharmacology}, volume = {135}, number = {}, pages = {156057}, doi = {10.1016/j.phymed.2024.156057}, pmid = {39357281}, issn = {1618-095X}, mesh = {Animals ; *Schisandra/chemistry ; *Depression/drug therapy ; Male ; Mice ; *Tryptophan/pharmacology ; *Gastrointestinal Microbiome/drug effects ; *Acetic Acid ; *Colitis, Ulcerative/drug therapy/chemically induced ; *Disease Models, Animal ; Mice, Inbred C57BL ; Blood-Brain Barrier/drug effects ; Dextran Sulfate ; Colon/drug effects/metabolism ; Cytokines/metabolism ; Hippocampus/drug effects/metabolism ; Plant Extracts/pharmacology ; Intestinal Mucosa/drug effects/metabolism ; }, abstract = {BACKGROUND: Ulcerative colitis (UC) is an inflammatory bowel disease characterized by its incurable nature and undefined etiology, which is often accompanied by a high prevalence of comorbid depression. The gut-brain axis has emerged as a promising treatment target in recent years.<br><br>PURPOSE: This study aimed to investigate how vinegar-processed Schisandra Chinensis (VSC) enhances therapeutic effects on depressive behavior in chronic UC mice.<br><br>METHODS: A chronic UC model was induced in mice using dextran sulfate sodium. The therapeutic effects of both raw and vinegar-processed Schisandra Chinensis on UC and associated depressive symptoms were assessed. Colonic mucosal damage was evaluated using hematoxylin and eosin (H&amp;E) and Alcian blue staining. The integrity of the blood-brain barrier (BBB) and synaptic structures was visualized via transmission electron microscopy (TEM). Enzyme-linked immunosorbent assay (ELISA) was employed to quantify inflammatory cytokine levels in the colon, serum, and brain, while western blotting was performed for protein expression analysis. Additionally, metagenomic analysis was conducted to investigate gut microbiota composition. Nissl staining and immunofluorescence were used to assess hippocampal neuronal damage, and behavioral assessments including the morris water maze, open field test, forced swimming test and tail suspension test, were implemented to evaluate depressive states. Serum metabolites were analyzed using UPLC-MS/MS.<br><br>RESULTS: Both raw and vinegar-processed Schisandra Chinensis significantly upregulated aryl hydrocarbon receptor (AhR), inhibited NF-&#x3ba;B p-p65 activation, and reduced levels of pro-inflammatory cytokine. These treatments also enhanced the expression of tight junction proteins, restored colonic mucosal and BBB integrity, alleviated damage to hippocampal neurons, and improved synaptic structure. Behavioral assessments indicated that VSC was particularly effective in ameliorating depressive-like behaviors in chronic UC mice. In the gut, both treatments reshaped the gut microbial composition, restoring the relative abundance of Duncaniella, Candidatus_Amulumruptor, Alistipes, Parabacteroides, Lachnospiraceae_bacterium, uncultured_Bacteroides_sp., Candidatus_Amulumruptor_caecigallinarius, with VSC showing more pronounced effects. Serum metabolomics revealed an increase in tryptophan levels and a decrease in kynurenine and xanthurenic acid levels with VSC, indicating that tryptophan metabolism shifted from the kynurenine pathway to the 5-HT or indole pathway. However, this phenomenon did not occur with Schisandra Chinensis (SC).<br><br>CONCLUSION: This study demonstrated that the disruption of tryptophan metabolic balance served as a biological mechanism underlying the occurrence of depressive behaviors induced by UC. The application of SC following vinegar processing enhanced its regulatory effects on gut microbiota and tryptophan metabolism. This findings provided a new insight for the clinical management of gut-brain comorbidities.}, }
@article {pmid39353343, year = {2024}, author = {Zheng, X and Li, J and Ouyang, Y and Wu, G and He, X and Wang, D and Zhang, XX}, title = {Ecological linkages between top-down designed benzothiazole-degrading consortia and selection strength: From performance to community structure and functional genes.}, journal = {Water research}, volume = {267}, number = {}, pages = {122491}, doi = {10.1016/j.watres.2024.122491}, pmid = {39353343}, issn = {1879-2448}, mesh = {*Benzothiazoles ; *Biodegradation, Environmental ; Microbial Consortia ; Rhodococcus/genetics/metabolism ; }, abstract = {The inefficient biodegradation and incomplete mineralization of nitrogenous heterocyclic compounds (NHCs) have emerged as a pressing environmental concern. The top-down design offers potential solutions to this issue by targeting improvements in community function, but the ecological linkages between selection strength and the structure and function of desired microbiomes remain elusive. Herein, the integration of metagenomics, culture-based approach, non-targeted metabolite screening and enzymatic verification experiments revealed the effect of enrichment concentration on the top-down designed benzothiazole (BTH, a typical NHC)-degrading consortia. Significant differences were observed for the degradation efficiency and community structure under varying BTH selections. Notably, the enriched consortia at high concentrations of BTH were dominated by genus Rhodococcus, possessing higher degradation rates. Moreover, the isolate Rhodococcus pyridinivorans Rho48 displayed excellent efficiencies in BTH removal (98 %) and mineralization (∼ 60 %) through the hydroxylation and cleavage of thiazole and benzene rings, where cytochrome P450 enzyme was firstly reported to participate in BTH conversion. The functional annotation of 460 recovered genomes from the enriched consortia revealed diverse interspecific cooperation patterns that accounted for the BTH mineralization, particularly Nakamurella and Micropruina under low selection strength, and Rhodococcus and Marmoricola under high selection strength. This study highlights the significance of selection strength in top-down design of synthetic microbiomes for degrading refractory organic pollutants, providing valuable guidance for designing functionally optimized microbiomes used in environmental engineering.}, }
@article {pmid39356745, year = {2024}, author = {Hartman, SJ and Hibberd, MC and Mostafa, I and Naila, NN and Islam, MM and Zaman, MU and Huq, S and Mahfuz, M and Islam, MT and Mukherji, K and Moghaddam, VA and Chen, RY and Province, MA and Webber, DM and Henrissat, S and Henrissat, B and Terrapon, N and Rodionov, DA and Osterman, AL and Barratt, MJ and Ahmed, T and Gordon, JI}, title = {A microbiome-directed therapeutic food for children recovering from severe acute malnutrition.}, journal = {Science translational medicine}, volume = {16}, number = {767}, pages = {eadn2366}, pmid = {39356745}, issn = {1946-6242}, support = {R01 DK030292/DK/NIDDK NIH HHS/United States ; R37 DK030292/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Severe Acute Malnutrition/diet therapy/therapy ; Infant ; Microbiota ; Male ; Female ; Bangladesh ; Gastrointestinal Microbiome ; }, abstract = {Globally, severe acute malnutrition (SAM), defined as a weight-for-length z-score more than three SDs below a reference mean (WLZ < -3), affects 14 million children under 5 years of age. Complete anthropometric recovery after standard, short-term interventions is rare, with children often left with moderate acute malnutrition (MAM; WLZ -2 to -3). We conducted a randomized controlled trial (RCT) involving 12- to 18-month-old Bangladeshi children from urban and rural sites, who, after initial hospital-based treatment for SAM, received a 3-month intervention with a microbiome-directed complementary food (MDCF-2) or a calorically more dense, standard ready-to-use supplementary food (RUSF). The rate of WLZ improvement was significantly greater in MDCF-2-treated children (P = 8.73 × 10[-3]), similar to our previous RCT of Bangladeshi children with MAM without antecedent SAM (P = 0.032). A correlated meta-analysis of plasma levels of 4520 proteins in both RCTs revealed 215 positively associated with WLZ (largely representing musculoskeletal and central nervous system development) and 44 negatively associated (primarily related to immune activation). Moreover, the positively associated proteins were significantly enriched by MDCF-2 (q = 1.1 × 10[-6]). Characterizing the abundances of 754 bacterial metagenome-assembled genomes in serially collected fecal samples disclosed the effects of acute rehabilitation for SAM on the microbiome and how, during treatment for MAM, specific strains of Prevotella copri function at the intersection between MDCF-2 glycan metabolism and anthropometric recovery. These results provide a rationale for further testing the generalizability of MDCF efficacy and for identifying biomarkers to define treatment responses.}, }
@article {pmid39354675, year = {2024}, author = {Šardzíková, S and Gajewska, M and Gałka, N and Štefánek, M and Baláž, A and Garaiová, M and Holič, R and Świderek, W and Šoltys, K}, title = {Can longer lifespan be associated with gut microbiota involvement in lipid metabolism?.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {11}, pages = {}, pmid = {39354675}, issn = {1574-6941}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Lipid Metabolism ; Mice ; Male ; Female ; *Longevity ; *RNA, Ribosomal, 16S/genetics ; Bacteria/genetics/metabolism/classification ; Mice, Inbred C57BL ; Feces/microbiology ; Cholesterol Esters/metabolism ; }, abstract = {Biological aging is linked to altered body composition and reduced neuroactive steroid hormones like dehydroepiandrosterone sulfate (DHEAS), which can stimulate the GABA signaling pathway via gut microbiota. Our study examined the association of gut microbiota with lifespan in mice through comprehensive analysis of its composition and functional involvement in cholesterol sulfate, a precursor of DHEAS, metabolism. We used 16S rRNA and metagenomic sequencing, followed by metabolic pathway prediction and thin layer chromatography and MALDI-TOF cholesterol sulfate identification. Significant increases in bacteria such as Bacteroides, typical for long-lived and Odoribacter and Colidextribacter, specific for short-lived mice were detected. Furthermore, for males (Rikenella and Alloprevotella) and females (Lactobacillus and Bacteroides), specific bacterial groups emerged as predictors (AUC = 1), highlighting sex-specific patterns. Long-lived mice showed a strong correlation of Bacteroides (0.918) with lipid and steroid hormone metabolism, while a negative correlation of GABAergic synapse with body weight (-0.589). We found that several Bacteroides species harboring the sulfotransferase gene and gene cluster for sulfonate donor synthesis are involved in converting cholesterol to cholesterol sulfate, significantly higher in the feces of long-lived individuals. Overall, we suggest that increased involvement of gut bacteria, mainly Bacteroides spp., in cholesterol sulfate synthesis could ameliorate aging through lipid metabolism.}, }
@article {pmid39354152, year = {2024}, author = {Freire-Zapata, V and Holland-Moritz, H and Cronin, DR and Aroney, S and Smith, DA and Wilson, RM and Ernakovich, JG and Woodcroft, BJ and Bagby, SC and ,  and ,  and Rich, VI and Sullivan, MB and Stegen, JC and Tfaily, MM}, title = {Microbiome-metabolite linkages drive greenhouse gas dynamics over a permafrost thaw gradient.}, journal = {Nature microbiology}, volume = {9}, number = {11}, pages = {2892-2908}, pmid = {39354152}, issn = {2058-5276}, support = {DE-SC0021349//DOE | SC | Biological and Environmental Research (BER)/ ; 2022070//NSF | Directorate for Biological Sciences (BIO)/ ; }, mesh = {*Permafrost/microbiology ; *Greenhouse Gases/metabolism/analysis ; *Microbiota ; *Methane/metabolism ; *Metagenomics ; *Carbon Dioxide/metabolism ; *Bacteria/metabolism/genetics/classification ; Sweden ; Ecosystem ; Soil Microbiology ; }, abstract = {Interactions between microbiomes and metabolites play crucial roles in the environment, yet how these interactions drive greenhouse gas emissions during ecosystem changes remains unclear. Here we analysed microbial and metabolite composition across a permafrost thaw gradient in Stordalen Mire, Sweden, using paired genome-resolved metagenomics and high-resolution Fourier transform ion cyclotron resonance mass spectrometry guided by principles from community assembly theory to test whether microorganisms and metabolites show concordant responses to changing drivers. Our analysis revealed divergence between the inferred microbial versus metabolite assembly processes, suggesting distinct responses to the same selective pressures. This contradicts common assumptions in trait-based microbial models and highlights the limitations of measuring microbial community-level data alone. Furthermore, feature-scale analysis revealed connections between microbial taxa, metabolites and observed CO2 and CH4 porewater variations. Our study showcases insights gained by using feature-level data and microorganism-metabolite interactions to better understand metabolic processes that drive greenhouse gas emissions during ecosystem changes.}, }
@article {pmid39354019, year = {2024}, author = {Oaikhena, AO and Coker, ME and Cyril-Okoh, D and Wicaksono, WA and Olimi, E and Berg, G and Okeke, IN}, title = {The phyllosphere of Nigerian medicinal plants, Euphorbia lateriflora and Ficus thonningii is inhabited by a specific microbiota.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {22806}, pmid = {39354019}, issn = {2045-2322}, mesh = {*Euphorbia ; *Ficus/microbiology ; *Microbiota/genetics ; *Plants, Medicinal/microbiology ; *Bacteria/genetics/classification/isolation &amp; purification ; *RNA, Ribosomal, 16S/genetics ; *Plant Leaves/microbiology ; *Fungi/genetics/classification/isolation &amp; purification ; Nigeria ; Phylogeny ; }, abstract = {The microbiota of medicinal plants is known to be highly specific and can contribute to medicinal activity. However, the majority of plant species have not yet been studied. Here, we investigated the phyllosphere composition of two common Nigerian medicinal plants, Euphorbia lateriflora and Ficus thonningii, by a polyphasic approach combining analyses of metagenomic DNA and isolates. Microbial abundance estimated via qPCR using specific marker gene primers showed that all leaf samples were densely colonized, with up to 10[8] per gram of leaf, with higher bacterial and fungal abundance than Archaea. While no statistically significant differences between both plant species were found for abundance, amplicon sequencing of 16S rRNA and ITS genes revealed distinct microbiota compositions. Only seven of the 27 genera isolated were represented on both plants, e.g. dominant Sphingomonas spp., and numerous members of Xanthomonadaceae and Enterobacteriaceae. The most dominant fungal families on both plants were Cladosporiaceae, Mycosphaerellaceae and Trichosphaeriaceae. In addition, 225 plant-specific isolates were identified, with Pseudomonadota and Enterobacteriaceae being dominant. Interestingly, 29 isolates are likely species previously unknown, and 14 of these belong to Burkholderiales. However, a high proportion, 56% and 40% of the isolates from E. lateriflora and F. thonningii, respectively, were characterized as various Escherichia coli. The growth of most of the bacterial isolates was not influenced by extractable secondary metabolites of plants. Our results suggest that a specific and diverse microbial community inhabits the leaves of both E. lateriflora and F. thonningii, including potentially new species and producers of antimicrobials.}, }
@article {pmid39354003, year = {2024}, author = {Li, Y and Liu, H and Xiao, Y and Jing, H}, title = {Metagenome sequencing and 982 microbial genomes from Kermadec and Diamantina Trenches sediments.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1067}, pmid = {39354003}, issn = {2052-4463}, mesh = {*Geologic Sediments/microbiology ; *Metagenome ; *Archaea/genetics ; *Phylogeny ; *Bacteria/genetics/classification ; Genome, Microbial ; Microbiota ; Genome, Archaeal ; }, abstract = {Deep-sea trenches representing an intriguing ecosystem for exploring the survival and evolutionary strategies of microbial communities in the highly specialized deep-sea environments. Here, 29 metagenomes were obtained from sediment samples collected from Kermadec and Diamantina trenches. Notably, those samples covered a varying sampling depths (from 5321 m to 9415 m) and distinct layers within the sediment itself (from 0~40 cm in Kermadec trench and 0~24 cm in Diamantina trench). Through metagenomic binning process, we reconstructed 982 metagenome assembled genomes (MAGs) with completeness >60% and contamination <5%. Within them, completeness of 351 MAGs were >90%, while an additional 331 were >80%. Phylogenomic analysis for the MAGs revealed nearly all of them were distantly related to known cultivated isolates. The abundant bacterial MAGs affiliated to phyla of Proteobacteria, Planctomycetota, Nitrospirota, Acidobacteriota, Actinobacteriota, and Chlorofexota, while the abundant archaeal phyla affiliated with Nanoarchaeota and Thermoproteota. These results provide a dataset available for further interrogation of diversity, distribution and ecological function of deep-sea microbes existed in the trenches.}, }
@article {pmid39352141, year = {2024}, author = {Coclet, C and Camargo, AP and Roux, S}, title = {MVP: a modular viromics pipeline to identify, filter, cluster, annotate, and bin viruses from metagenomes.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0088824}, pmid = {39352141}, issn = {2379-5077}, mesh = {*Metagenome/genetics ; *Genome, Viral/genetics ; *Metagenomics/methods ; *Viruses/genetics/classification/isolation &amp; purification ; Software ; Virome/genetics ; Computational Biology/methods ; Molecular Sequence Annotation ; }, abstract = {While numerous computational frameworks and workflows are available for recovering prokaryote and eukaryote genomes from metagenome data, only a limited number of pipelines are designed specifically for viromics analysis. With many viromics tools developed in the last few years alone, it can be challenging for scientists with limited bioinformatics experience to easily recover, evaluate quality, annotate genes, dereplicate, assign taxonomy, and calculate relative abundance and coverage of viral genomes using state-of-the-art methods and standards. Here, we describe Modular Viromics Pipeline (MVP) v.1.0, a user-friendly pipeline written in Python and providing a simple framework to perform standard viromics analyses. MVP combines multiple tools to enable viral genome identification, characterization of genome quality, filtering, clustering, taxonomic and functional annotation, genome binning, and comprehensive summaries of results that can be used for downstream ecological analyses. Overall, MVP provides a standardized and reproducible pipeline for both extensive and robust characterization of viruses from large-scale sequencing data including metagenomes, metatranscriptomes, viromes, and isolate genomes. As a typical use case, we show how the entire MVP pipeline can be applied to a set of 20 metagenomes from wetland sediments using only 10 modules executed via command lines, leading to the identification of 11,656 viral contigs and 8,145 viral operational taxonomic units (vOTUs) displaying a clear beta-diversity pattern. Further, acting as a dynamic wrapper, MVP is designed to continuously incorporate updates and integrate new tools, ensuring its ongoing relevance in the rapidly evolving field of viromics. MVP is available at https://gitlab.com/ccoclet/mvp and as versioned packages in PyPi and Conda.IMPORTANCEThe significance of our work lies in the development of Modular Viromics Pipeline (MVP), an integrated and user-friendly pipeline tailored exclusively for viromics analyses. MVP stands out due to its modular design, which ensures easy installation, execution, and integration of new tools and databases. By combining state-of-the-art tools such as geNomad and CheckV, MVP provides high-quality viral genome recovery and taxonomy and host assignment, and functional annotation, addressing the limitations of existing pipelines. MVP's ability to handle diverse sample types, including environmental, human microbiome, and plant-associated samples, makes it a versatile tool for the broader microbiome research community. By standardizing the analysis process and providing easily interpretable results, MVP enables researchers to perform comprehensive studies of viral communities, significantly advancing our understanding of viral ecology and its impact on various ecosystems.}, }
@article {pmid39351905, year = {2024}, author = {Feng, M and Robinson, S and Qi, W and Edwards, A and Stierli, B and van der Heijden, M and Frey, B and Varliero, G}, title = {Microbial genetic potential differs among cryospheric habitats of the Damma glacier.}, journal = {Microbial genomics}, volume = {10}, number = {10}, pages = {}, pmid = {39351905}, issn = {2057-5858}, mesh = {*Ice Cover/microbiology ; *Ecosystem ; Soil Microbiology ; Nitrogen Fixation/genetics ; Microbiota/genetics ; Metagenomics ; Geologic Sediments/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Metagenome ; Nitrogen Cycle/genetics ; }, abstract = {Climate warming has led to glacier retreat worldwide. Studies on the taxonomy and functions of glacier microbiomes help us better predict their response to glacier melting. Here, we used shotgun metagenomic sequencing to study the microbial functional potential in different cryospheric habitats, i.e. surface snow, supraglacial and subglacial sediments, subglacial ice, proglacial stream water and recently deglaciated soils. The functional gene structure varied greatly among habitats, especially for snow, which differed significantly from all other habitats. Differential abundance analysis revealed that genes related to stress responses (e.g. chaperones) were enriched in ice habitat, supporting the fact that glaciers are a harsh environment for microbes. The microbial metabolic capabilities related to carbon and nitrogen cycling vary among cryospheric habitats. Genes related to auxiliary activities were overrepresented in the subglacial sediment, suggesting a higher genetic potential for the degradation of recalcitrant carbon (e.g., lignin). As for nitrogen cycling, genes related to nitrogen fixation were more abundant in barren proglacial soils, possibly due to the presence of Cyanobacteriota in this habitat. Our results deepen our understanding of microbial processes in glacial ecosystems, which are vulnerable to ongoing global warming, and they have implications for downstream ecosystems.}, }
@article {pmid39351368, year = {2024}, author = {Tolstoganov, I and Chen, Z and Pevzner, P and Korobeynikov, A}, title = {SpLitteR: diploid genome assembly using TELL-Seq linked-reads and assembly graphs.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e18050}, pmid = {39351368}, issn = {2167-8359}, mesh = {*Diploidy ; Animals ; Humans ; Genome, Human/genetics ; Sheep/genetics ; Software ; Sequence Analysis, DNA/methods ; Gastrointestinal Microbiome/genetics ; High-Throughput Nucleotide Sequencing/methods ; Genome/genetics ; }, abstract = {BACKGROUND: Recent advances in long-read sequencing technologies enabled accurate and contiguous de novo assemblies of large genomes and metagenomes. However, even long and accurate high-fidelity (HiFi) reads do not resolve repeats that are longer than the read lengths. This limitation negatively affects the contiguity of diploid genome assemblies since two haplomes share many long identical regions. To generate the telomere-to-telomere assemblies of diploid genomes, biologists now construct their HiFi-based phased assemblies and use additional experimental technologies to transform them into more contiguous diploid assemblies. The barcoded linked-reads, generated using an inexpensive TELL-Seq technology, provide an attractive way to bridge unresolved repeats in phased assemblies of diploid genomes.<br><br>RESULTS: We developed the SpLitteR tool for diploid genome assembly using linked-reads and assembly graphs and benchmarked it against state-of-the-art linked-read scaffolders ARKS and SLR-superscaffolder using human HG002 genome and sheep gut microbiome datasets. The benchmark showed that SpLitteR scaffolding results in 1.5-fold increase in NGA50 compared to the baseline LJA assembly and other scaffolders while introducing no additional misassemblies on the human dataset.<br><br>CONCLUSION: We developed the SpLitteR tool for assembly graph phasing and scaffolding using barcoded linked-reads. We benchmarked SpLitteR on assembly graphs produced by various long-read assemblers and have demonstrated that TELL-Seq reads facilitate phasing and scaffolding in these graphs. This benchmarking demonstrates that SpLitteR improves upon the state-of-the-art linked-read scaffolders in the accuracy and contiguity metrics. SpLitteR is implemented in C++ as a part of the freely available SPAdes package and is available at https://github.com/ablab/spades/releases/tag/splitter-preprint.}, }
@article {pmid39349606, year = {2024}, author = {Guo, X and Lin, S and Zhang, X and Li, M and Wang, Z and Peng, Y and He, X and Liu, J}, title = {Integrated metabolomic and microbiome analysis identifies Cupriavidus metallidurans as a potential therapeutic target for β-thalassemia.}, journal = {Annals of hematology}, volume = {103}, number = {12}, pages = {5169-5179}, pmid = {39349606}, issn = {1432-0584}, support = {21B0827//The Hunan Provincial Department of Education/ ; 202201065317//The Hunan Provincial Health Commission/ ; kq2004076//The Changsha Science and Technology Bureau/ ; 81920108004//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *beta-Thalassemia/metabolism/microbiology/therapy ; Mice ; *Gastrointestinal Microbiome ; *Metabolomics/methods ; *Cupriavidus/metabolism ; Disease Models, Animal ; Bilirubin/metabolism/blood ; Mice, Inbred C57BL ; Metabolome ; Feces/microbiology ; }, abstract = {β-thalassemia(β-TH) is an inherited hemoglobin disorder marked by ineffective erythropoiesis, anemia, splenomegaly, and systemic iron overload, predominantly affecting developing countries in tropical and subtropical regions. Despite extensive research on its pathogenesis, the interactions between gut microbiota and metabolites in β-TH remain poorly understood. This study compares fecal metabolomics and metagenomics between wildtype (Wt) and heterozygous Th3/+ mice, a model for non-transfusion-dependent β-thalassemia intermedia. Our results show increased intestinal bilirubin metabolism, with significant elevations in metabolites such as biliverdin, bilirubin, and stercobilin. Metagenomic analysis revealed notable differences in bacterial composition between Th3/+ and Wt mice. Specifically, Cupriavidus metallidurans was identified as a key bacterium that mitigates anemia by reducing liver and spleen iron deposition. This is the first study to ameliorate anemia in mice by altering gut microbiota, presenting new strategies for β-TH management.}, }
@article {pmid39349486, year = {2024}, author = {Sun, W and Zhang, Y and Guo, R and Sha, S and Chen, C and Ullah, H and Zhang, Y and Ma, J and You, W and Meng, J and Lv, Q and Cheng, L and Fan, S and Li, R and Mu, X and Li, S and Yan, Q}, title = {A population-scale analysis of 36 gut microbiome studies reveals universal species signatures for common diseases.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {96}, pmid = {39349486}, issn = {2055-5008}, support = {5050071720001//Beijing University of Chinese Medicine (BUCM)/ ; 2180072120049//Beijing University of Chinese Medicine (BUCM)/ ; 81503455//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Feces/microbiology ; Case-Control Studies ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenome ; Metagenomics/methods ; China ; Biodiversity ; }, abstract = {The gut microbiome has been implicated in various human diseases, though findings across studies have shown considerable variability. In this study, we reanalyzed 6314 publicly available fecal metagenomes from 36 case-control studies on different diseases to investigate microbial diversity and disease-shared signatures. Using a unified analysis pipeline, we observed reduced microbial diversity in many diseases, while some exhibited increased diversity. Significant alterations in microbial communities were detected across most diseases. A meta-analysis identified 277 disease-associated gut species, including numerous opportunistic pathogens enriched in patients and a depletion of beneficial microbes. A random forest classifier based on these signatures achieved high accuracy in distinguishing diseased individuals from controls (AUC = 0.776) and high-risk patients from controls (AUC = 0.825), and it also performed well in external cohorts. These results offer insights into the gut microbiome's role in common diseases in the Chinese population and will guide personalized disease management strategies.}, }
@article {pmid39347544, year = {2024}, author = {Yergaliyev, T and Künzel, S and Hanauska, A and Rees, A and Wild, KJ and Pétursdóttir, &#xc1;H and Gunnlaugsdóttir, H and Reynolds, CK and Humphries, DJ and Rodehutscord, M and Camarinha-Silva, A}, title = {The effect of Asparagopsis taxiformis, Ascophyllum nodosum, and Fucus vesiculosus on ruminal methanogenesis and metagenomic functional profiles in vitro.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0394223}, pmid = {39347544}, issn = {2165-0497}, support = {19084,19084-20//EC | H2020 | H2020 European Institute of Innovation and Technology (EIT)/ ; }, mesh = {*Methane/metabolism ; Animals ; *Seaweed/microbiology ; *Rumen/microbiology ; *Ascophyllum/metabolism ; *Fucus/microbiology/metabolism ; *Bacteria/classification/genetics/metabolism/drug effects/isolation &amp; purification ; Metagenomics ; Scotland ; Archaea/classification/metabolism/genetics/drug effects/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; Portugal ; Ruminants/microbiology ; Microbiota/drug effects ; Animal Feed/analysis ; Gastrointestinal Microbiome/drug effects ; Rhodophyta ; }, abstract = {UNLABELLED: The ruminant-microorganism symbiosis is unique by providing high-quality food from fibrous materials but also contributes to the production of one of the most potent greenhouse gases-methane. Mitigating methanogenesis in ruminants has been a focus of interest in the past decades. One of the promising strategies to combat methane production is the use of feed supplements, such as seaweeds, that might mitigate methanogenesis via microbiome modulation and direct chemical inhibition. We conducted in vitro investigations of the effect of three seaweeds (Ascophyllum nodosum, Asparagopsis taxiformis, and Fucus vesiculosus) harvested at different locations (Iceland, Scotland, and Portugal) on methane production. We applied metataxonomics (16S rRNA gene amplicons) and metagenomics (shotgun) methods to uncover the interplay between the microbiome's taxonomical and functional states, methanogenesis rates, and seaweed supplementations. Methane concentration was reduced by A. nodosum and F. vesiculosus, both harvested in Scotland and A. taxiformis, with the greatest effect of the latter. A. taxiformis acted through the reduction of archaea-to-bacteria ratios but not eukaryotes-to-bacteria. Moreover, A. taxiformis application was accompanied by shifts in both taxonomic and functional profiles of the microbial communities, decreasing not only archaeal ratios but also abundances of methanogenesis-associated functions. Methanobrevibacter "SGMT" (M. smithii, M. gottschalkii, M. millerae or M. thaueri; high methane yield) to "RO" (M. ruminantium and M. olleyae; low methane yield) clades ratios were also decreased, indicating that A. taxiformis application favored Methanobrevibacter species that produce less methane. Most of the functions directly involved in methanogenesis were less abundant, while the abundances of the small subset of functions that participate in methane assimilation were increased.<br><br>IMPORTANCE: The application of A. taxiformis significantly reduced methane production in vitro. We showed that this reduction was linked to changes in microbial function profiles, the decline in the overall archaeal community counts, and shifts in ratios of Methanobrevibacter "SGMT" and "RO" clades. A. nodosum and F. vesiculosus, obtained from Scotland, also decreased methane concentration in the total gas, while the same seaweed species from Iceland did not.}, }
@article {pmid39347539, year = {2024}, author = {Yuan, Y and Hu, H and Sun, Z and Wang, W and Wang, Z and Zheng, M and Xing, Y and Zhang, W and Wang, M and Lu, X and Li, Y and Liang, C and Lin, Z and Xie, C and Li, J and Mao, T}, title = {Combining Metagenomics, Network Pharmacology and RNA-Seq Strategies to Reveal the Therapeutic Effects and Mechanisms of Qingchang Wenzhong Decoction on Inflammatory Bowel Disease in Mice.}, journal = {Drug design, development and therapy}, volume = {18}, number = {}, pages = {4273-4289}, pmid = {39347539}, issn = {1177-8881}, mesh = {Animals ; Mice ; *Drugs, Chinese Herbal/pharmacology/chemistry ; *Inflammatory Bowel Diseases/drug therapy ; *Metagenomics ; *Gastrointestinal Microbiome/drug effects ; *Network Pharmacology ; *Dextran Sulfate ; *Mice, Inbred C57BL ; Disease Models, Animal ; Male ; RNA-Seq ; }, abstract = {BACKGROUND: Inflammatory bowel disease (IBD) is a chronic and recurrent inflammatory disease that lacks effective treatments. Qingchang Wenzhong Decoction (QCWZD) is a clinically effective herbal prescription that has been proven to attenuate intestinal inflammation in IBD. However, its molecular mechanism of action has not been clearly elucidated.<br><br>PURPOSE: We aimed to probe the mechanism of QCWZD for the treatment of IBD.<br><br>METHODS: The dextran sulfate sodium (DSS)-induced mouse model of IBD was used to identify the molecular targets involved in the mechanism of action of QCWZD. Metagenomics sequencing was utilized to analyze the differences in gut microbiota and the functional consequences of these changes. Network pharmacology combined with RNA sequencing (RNA-seq) were employed to predict the molecular targets and mechanism of action of QCWZD, and were validated through in vivo experiments.<br><br>RESULTS: Our results demonstrated that QCWZD treatment alleviated intestinal inflammation and accelerated intestinal mucosal healing that involved restoration of microbial homeostasis. This hypothesis was supported by the results of bacterial metagenomics sequencing that showed attenuation of gut dysbiosis by QCWZD treatment, especially the depletion of the pathogenic bacterial genus Bacteroides, while increasing the beneficial microorganism Akkermansia muciniphila that led to altered bacterial gene functions, such as metabolic regulation. Network pharmacology and RNA-seq analyses showed that Th17 cell differentiation plays an important role in QCWZD-based treatment of IBD. This was confirmed by in vivo experiments showing a marked decrease in the percentage of CD3[+]CD4[+]IL-17[+] (Th17) cells. Furthermore, our results also showed that the key factors associated with Th17 cell differentiation (IL-17, NF-&#x3ba;B, TNF-&#x3b1; and IL-6) in the colon were significantly reduced in QCWZD-treated colitis mice.<br><br>CONCLUSION: QCWZD exerted beneficial effects in the treatment of IBD by modulating microbial homeostasis while inhibiting Th17 cell differentiation and its associated pathways, providing a novel and promising therapeutic strategy for the treatment of IBD.}, }
@article {pmid39346055, year = {2024}, author = {Knobloch, S and Salimi, F and Buaya, A and Ploch, S and Thines, M}, title = {RAPiD: a rapid and accurate plant pathogen identification pipeline for on-site nanopore sequencing.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e17893}, pmid = {39346055}, issn = {2167-8359}, mesh = {*Nanopore Sequencing/methods ; Metagenomics/methods ; Plant Diseases/microbiology ; Bacteria/genetics/isolation &amp; purification/classification ; Sequence Analysis, DNA/methods ; Fungi/genetics/isolation &amp; purification/classification ; Plants/microbiology ; Computational Biology/methods ; }, abstract = {Nanopore sequencing technology has enabled the rapid, on-site taxonomic identification of samples from anything and anywhere. However, sequencing errors, inadequate databases, as well as the need for bioinformatic expertise and powerful computing resources, have hampered the widespread use of the technology for pathogen identification in the agricultural sector. Here we present RAPiD, a lightweight and accurate real-time taxonomic profiling pipeline. Compared to other metagenomic profilers, RAPiD had a higher classification precision achieved through the use of a curated, non-redundant database of common agricultural pathogens and extensive quality filtering of alignments. On a fungal, bacterial and mixed mock community RAPiD was the only pipeline to detect all members of the communities. We also present a protocol for in-field sample processing enabling pathogen identification from plant sample to sequence within 3 h using low-cost equipment. With sequencing costs continuing to decrease and more high-quality reference genomes becoming available, nanopore sequencing provides a viable method for rapid and accurate pathogen identification in the field. A web implementation of the RAPiD pipeline for real-time analysis is available at https://agrifuture.senckenberg.de.}, }
@article {pmid39345197, year = {2024}, author = {Wei, Y and Zhang, Y and Zhuang, Y and Tang, Y and Nie, H and Haung, Y and Liu, T and Yang, W and Yan, F and Zhu, Y}, title = {Veillonella parvula acts as a pathobiont promoting the biofilm virulence and cariogenicity of Streptococcus mutans in adult severe caries.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0431823}, pmid = {39345197}, issn = {2165-0497}, support = {82201055//MOST | National Natural Science Foundation of China (NSFC)/ ; 0223A205//2015 cultivation program for reserve talents for academic leaders of Nanjing Stomatological Hospital/ ; 2022-R-203 0222C116//3456 cultivation program for junior talents of Nanjing Stomatological Hospital/ ; ZKX23053//Nanjing Medical Science and Technique Development Foundation/ ; }, mesh = {*Biofilms/growth &amp; development ; *Streptococcus mutans/genetics/pathogenicity/physiology ; *Dental Caries/microbiology ; *Dental Plaque/microbiology ; Humans ; Virulence ; Animals ; Adult ; *Veillonella/genetics/physiology/pathogenicity ; Rats ; Male ; Mice ; Female ; Microbiota ; }, abstract = {Adult severe caries (ASC) brings severe oral dysfunction and treatment difficulties to patients, and yet no clear pathogenic mechanism for it has been found. This study is focused on the composition of dental plaque microbiome profiles in order to identify disease-relevant species and to investigate into their interactions with the S. mutans. Samples of dental plaque were collected for metagenomic analysis. The acidification, aciduricity, oxidative stress tolerance, and gtf (glucosyltransferase) gene expression of S. mutans cocultured with V. parvula which was identified as ASC-related dominant bacterium. The biofilm formation and extracellular exopolysaccharide (EPS) synthesis of dual-strain were analyzed with scanning electron microscopy (SEM), crystal violet (CV) staining, live/dead bacterial staining, and confocal laser scanning microscopy (CLSM). Furthermore, rodent model experiments were performed to validate the in vivo cariogenicity of the dual-species biofilm. The most significantly abundant taxon found associated with ASC was V. parvula. In vitro experiments found that V. parvula can effectively promote S. mutans mature biofilm formation with enhanced acid resistance, hydrogen peroxide detoxicity, and biofilm virulence. Rodent model experiments revealed that V. parvula was incapable of causing disease on its own, but it significantly heightened the biofilm virulence of S. mutans when being co-infected and augmented the progression, quantity, and severity of dental caries. Our findings demonstrated that V. parvula may act as a synergistic pathobiont to modulate the metabolic activity, spatial structure, and pathogenicity of biofilms of S. mutans in the context of ASC.IMPORTANCEAdult severe caries (ASC), as a special type of acute caries, is rarely reported and its worthiness of further study is still in dispute. Yet studies on the etiology of severe caries in adults have not found a clear pathogenic mechanism for it. Knowledge of the oral microbiota is important for the treatment of dental caries. We discovered that the interaction between V. parvula and S. mutans augments the severity of dental caries in vivo, suggesting V. parvula may act as a synergistic pathobiont exacerbating biofilm virulence of S. mutans in ASC. Our findings may improve the understanding of ASC pathogenesis and are likely to provide a basis for planning appropriate therapeutic strategies.}, }
@article {pmid39343535, year = {2024}, author = {Masuda, N and Kato, S and Ohkuma, M and Endo, K}, title = {Metagenomic Insights into Ecophysiology of Zetaproteobacteria and Gammaproteobacteria in Shallow Zones within Deep-sea Massive Sulfide Deposits.}, journal = {Microbes and environments}, volume = {39}, number = {3}, pages = {}, pmid = {39343535}, issn = {1347-4405}, mesh = {*Sulfides/metabolism ; *Gammaproteobacteria/genetics/classification/isolation &amp; purification ; *Metagenomics ; *Seawater/microbiology ; *Metagenome ; Geologic Sediments/microbiology/chemistry ; Phylogeny ; Ecosystem ; Pacific Ocean ; Oxidation-Reduction ; Microbiota/genetics ; Carbon Cycle ; }, abstract = {Deep-sea massive sulfide deposits serve as energy sources for chemosynthetic ecosystems in dark, cold environments even after hydrothermal activity ceases. However, the vertical distribution of microbial communities within sulfide deposits along their depth from the seafloor as well as their ecological roles remain unclear. We herein conducted a culture-independent metagenomic ana-lysis of a core sample of massive sulfide deposits collected in a hydrothermally inactive field of the Southern Mariana Trough, Western Pacific, by drilling (sample depth: 0.52‍ ‍m below the seafloor). Based on the gene context of the metagenome-assembled genomes (MAGs) obtained, we showed the metabolic potential of as-yet-uncultivated microorganisms, particularly those unique to the shallow zone rich in iron hydroxides. Some members of Gammaproteobacteria have potential for the oxidation of reduced sulfur species (such as sulfide and thiosulfate) to sulfate coupled to nitrate reduction to ammonia and carbon fixation via the Calvin-Benson-Bassham (CBB) cycle, as the primary producers. The Zetaproteobacteria member has potential for iron oxidation coupled with microaerobic respiration. A comparative ana-lysis with previously reported metagenomes from deeper zones (~2‍ ‍m below the seafloor) of massive sulfide deposits revealed a difference in the relative abundance of each putative primary producer between the shallow and deep zones. Our results expand knowledge on the ecological potential of uncultivated microorganisms in deep-sea massive sulfide deposits and provide insights into the vertical distribution patterns of chemosynthetic ecosystems.}, }
@article {pmid39342753, year = {2024}, author = {Zou, S and Hu, R and Liang, S and Lu, T and Kang, D and Li, D}, title = {Assessment of health risk of antibiotics resistance genes from human disturbed habitat to wild animals: Metagenomic insights into availability and functional changes of gut microbiome.}, journal = {Ecotoxicology and environmental safety}, volume = {285}, number = {}, pages = {117117}, doi = {10.1016/j.ecoenv.2024.117117}, pmid = {39342753}, issn = {1090-2414}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Ecosystem ; *Drug Resistance, Microbial/genetics ; Humans ; *Animals, Wild/microbiology ; Risk Assessment ; Colobinae/microbiology/genetics ; Metagenomics ; Metagenome ; Environmental Monitoring ; Anti-Bacterial Agents/pharmacology/toxicity ; }, abstract = {Not all antibiotic resistance genes (ARGs) pose an ecological risk to their host animals. A standard should be developed to study which types of ARGs posed an ecological risk to wild animals under human disturbances (HDs). In this study, the golden snub-nosed monkeys (Rhinopithecus roxellana) were used as sentinel species. According to the animals-associated enrichment, mobility, and pathogenicity, the ARGs in habitat of sentinel species were divided into four levels. If the mobile and pathogenic ARGs that could be collinear with the metagenome-assembled genome (MAGs) in the gut of the sentinel species, the ARGs were defined as Rank I ARGs and they were considered to have ecological risk to sentinel species. Functional genes in the MAGs that collinear with the Rank I ARGs were used to predict the health risks of sentinel species. The ecological risk to sentinel species was present in 0.158 % of the ARGs-contigs in the habitat. Cultivation and villages, but not grazing, agriculture and ecotourism, increased the ecological risk of the ARGs to wild animals, The ability of gut microbiome to acquire mobile and pathogenic ARGs increased, as did the collinear functional genes, and the health risks of the wild animals also enhanced by the disturbances of cultivation and villages. Cultivation and villages increased the nutrient content of the soil, and they had a positive effect on the ecological risk of Rank I ARGs by affecting the mobile genetic elements (MGEs), microbiome and the resistant group in the habitat, which was why the cultivation and villages increased the health risks of wild animals. We proposed that cultivation and living should be controlled, while grazing, agriculture and ecotourism could be developed in nature reserves of wild animals, but the nutrients in the wild animals' habitat should be monitored.}, }
@article {pmid39342284, year = {2024}, author = {Seitz, VA and McGivern, BB and Borton, MA and Chaparro, JM and Schipanski, ME and Prenni, JE and Wrighton, KC}, title = {Cover crop root exudates impact soil microbiome functional trajectories in agricultural soils.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {183}, pmid = {39342284}, issn = {2049-2618}, support = {P30 CA046934/CA/NCI NIH HHS/United States ; 507580//Facilities Integrating Collaborations for User Science/ ; 2021-67019-34814//U.S. Department of Agriculture/ ; P30CA046934//Cancer Center Support Grant/ ; }, mesh = {*Soil Microbiology ; *Plant Roots/microbiology ; *Crops, Agricultural/microbiology ; *Microbiota ; *Rhizosphere ; *Soil/chemistry ; Bacteria/classification/metabolism/isolation &amp; purification ; Agriculture ; Plant Growth Regulators/metabolism ; Plant Exudates/metabolism ; Sorghum/metabolism/microbiology ; }, abstract = {BACKGROUND: Cover cropping is an agricultural practice that uses secondary crops to support the growth of primary crops through various mechanisms including erosion control, weed suppression, nutrient management, and enhanced biodiversity. Cover crops may elicit some of these ecosystem services through chemical interactions with the soil microbiome via root exudation, or the release of plant metabolites from roots. Phytohormones are one metabolite type exuded by plants that activate the rhizosphere microbiome, yet managing this chemical interaction remains an untapped mechanism for optimizing plant-soil-microbiome interactions. Currently, there is limited understanding on the diversity of cover crop phytohormone root exudation patterns and our aim was to understand how phytochemical signals selectively enrich specific microbial taxa and functionalities in agricultural soils.<br><br>RESULTS: Here, we link variability in cover crop root exudate composition to changes in soil microbiome functionality. Exudate chemical profiles from 4 cover crop species (Sorghum bicolor, Vicia villosa, Brassica napus, and Secale cereal) were used as the chemical inputs to decipher microbial responses. These distinct exudate profiles, along with a no exudate control, were amended to agricultural soil microcosms with microbial responses tracked over time using metabolomes and genome-resolved metatranscriptomes. Our findings illustrated microbial metabolic patterns were unique in response to cover crop exudate inputs over time, particularly by sorghum and cereal rye amended microcosms. In these microcosms, we identify novel microbial members (at the genera and family level) who produced IAA and GA4 over time. Additionally, we identified cover crop exudates exclusively enriched for bacterial nitrite oxidizers, while control microcosms were discriminated for nitrogen transport, mineralization, and assimilation, highlighting distinct changes in microbial nitrogen cycling in response to chemical inputs.<br><br>CONCLUSIONS: We highlight that root exudate amendments alter microbial community function (i.e., N cycling) and microbial phytohormone metabolisms, particularly in response to root exudates isolated from cereal rye and sorghum plants. Additionally, we constructed a soil microbial genomic catalog of microorganisms responding to commonly used cover crops, a public resource for agriculturally relevant microbes. Many of our exudate-stimulated microorganisms are representatives from poorly characterized or novel taxa, revealing the yet to be discovered metabolic reservoir harbored in agricultural soils. Our findings emphasize the tractability of high-resolution multi-omics approaches to investigate processes relevant for agricultural soils, opening the possibility of targeting specific soil biogeochemical outcomes through biological precision agricultural practices that use cover crops and the microbiome as levers for enhanced crop production. Video Abstract.}, }
@article {pmid39342129, year = {2024}, author = {García-Estrada, DA and Selem-Mojica, N and Martínez-Hernández, A and Lara-Reyna, J and Dávila-Ramos, S and Verdel-Aranda, K}, title = {Diversity of bacterial communities in wetlands of Calakmul Biosphere Reserve: a comparative analysis between conserved and semi-urbanized zones in pre-Mayan Train era.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {376}, pmid = {39342129}, issn = {1471-2180}, support = {No. 320237//Consejo Nacional de Humanidades, Ciencias y Tecnolog&#xed;as, M&#xe9;xico/ ; }, mesh = {*Wetlands ; *Bacteria/classification/genetics/isolation &amp; purification ; *RNA, Ribosomal, 16S/genetics ; *Microbiota/genetics ; *Biodiversity ; Metagenomics ; Phylogeny ; DNA, Bacterial/genetics ; Soil Microbiology ; }, abstract = {BACKGROUND: The Calakmul Biosphere Reserve (CBR) is known for its rich animal and plant biodiversity, yet its microbial communities remain largely unknown. The reserve does not possess permanent bodies of water; nevertheless, seasonal depressions associated with fractures create wetlands, known locally as aguadas. Given the recent construction of the Maya train that crosses the CRB, it is essential to assess the biodiversity of its microorganisms and recognize their potential as a valuable source of goods. This evaluation is pivotal in mitigating potential mismanagement of the forest ecosystem. To enhance comprehension of microbial communities, we characterized the microbiota in three different wetlands. Ag-UD1 and Ag-UD2 wetlands are located in a zone without human disturbances, while the third, Ag-SU3, is in a semi-urbanized zone. Sampling was carried out over three years (2017, 2018, and 2019), enabling the monitoring of spatiotemporal variations in bacterial community diversity. The characterization of microbiome composition was conducted using 16S rRNA metabarcoding. Concurrently, the genomic potential of select samples was examined through shotgun metagenomics.<br><br>RESULTS: Statistical analysis of alpha and beta diversity indices showed significant differences among the bacterial communities found in undisturbed sites Ag-UD1 and Ag-UD2 compared to Ag-SU3. However, no significant differences were observed among sites belonging to the undisturbed area. Furthermore, a comparative analysis at the zone level reveals substantial divergence among the communities, indicating that the geographic location of the samples significantly influences these patterns. The bacterial communities in the CBR wetlands predominantly consist of genera from phyla Actinobacteria, Acidobacteria, and Proteobacteria.<br><br>CONCLUSION: This characterization has identified the composition of microbial communities and provided the initial overview of the metabolic capacities of the microbiomes inhabiting the aguadas across diverse conservation zones. The three sites exhibit distinct microbial compositions, suggesting that variables such as chemical composition, natural and anthropogenic disturbances, vegetation, and fauna may play a pivotal role in determining the microbial structure of the aguadas. This study establishes a foundational baseline for evaluating the impact of climatic factors and human interventions on critical environments such as wetlands.}, }
@article {pmid39342083, year = {2024}, author = {Wang, X and Yao, S and Yang, X and Li, Y and Yu, Z and Huang, J and Wang, J}, title = {Peritoneal dialysis promotes microbial-driven biosynthesis pathways of sesquiterpenes and triterpenes compounds in end-stage renal disease patients.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {377}, pmid = {39342083}, issn = {1471-2180}, support = {32170071//National Natural Science Foundation of China/ ; 32300051//National Natural Science Foundation of China/ ; 2022JJ40663//Natural Science Foundation of Hunan Province/ ; C2023045//Hunan Province Traditional Chinese Medicine Research Program Project/ ; }, mesh = {Humans ; *Kidney Failure, Chronic/therapy/metabolism/microbiology ; *Gastrointestinal Microbiome ; *Peritoneal Dialysis ; *Sesquiterpenes/metabolism ; Male ; Female ; *Feces/microbiology ; Middle Aged ; *Triterpenes/metabolism ; Bacteria/metabolism/classification/genetics/isolation &amp; purification ; Biosynthetic Pathways ; Adult ; Metagenomics ; Aged ; }, abstract = {The concept of the gut-kidney axis is gaining significant attention due to the close relationship between gut microbiota and kidney disease. Peritoneal dialysis is recognized as a crucial renal replacement therapy for end-stage renal disease (ESRD). The alterations in gut microbiota and related mechanisms after receiving this dialysis method are not fully understood. This study conducted shotgun metagenomic sequencing on fecal samples from 11 end-stage renal disease patients who did not receive dialysis (ESRD_N) and 7 patients who received peritoneal dialysis (ESRD_P). After quality control and correlation analysis of the data, our study is aimed at exploring the impact of peritoneal dialysis on the gut microbiota and health of ESRD patients. Our research findings indicate that the complexity and aggregation characteristics of gut microbiota interactions increase in ESRD_P. In addition, the gut microbiota drives the biosynthesis pathways of sesquiterpenes and triterpenes in ESRD_P patients, which may contribute to blood purification and improve circulation. Therefore, our research will lay the foundation for the prevention and treatment of ESRD.}, }
@article {pmid39341403, year = {2024}, author = {Chen, X and Balliew, J and Bauer, CX and Deegan, J and Gitter, A and Hanson, BM and Maresso, AW and Tisza, MJ and Troisi, CL and Rios, J and Mena, KD and Boerwinkle, E and Wu, F}, title = {Revealing patterns of SARS-CoV-2 variant emergence and evolution using RBD amplicon sequencing of wastewater.}, journal = {The Journal of infection}, volume = {89}, number = {5}, pages = {106284}, doi = {10.1016/j.jinf.2024.106284}, pmid = {39341403}, issn = {1532-2742}, mesh = {*Wastewater/virology ; *SARS-CoV-2/genetics/isolation &amp; purification ; Humans ; *COVID-19/epidemiology/virology ; Texas/epidemiology ; Genome, Viral ; Evolution, Molecular ; Spike Glycoprotein, Coronavirus/genetics ; }, abstract = {OBJECTIVES: Rapid evolution of SARS-CoV-2 has resulted in the emergence of numerous variants, posing significant challenges to public health surveillance. Clinical genome sequencing, while valuable, has limitations in capturing the full epidemiological dynamics of circulating variants in the general population. This study aimed to monitor the SARS-CoV-2 variant community dynamics and evolution using receptor-binding domain (RBD) amplicon sequencing of wastewater samples.<br><br>METHODS: We sequenced wastewater from El Paso, Texas, over 17 months, compared the sequencing data with clinical genome data, and performed biodiversity analysis to reveal SARS-CoV-2 variant dynamics and evolution.<br><br>RESULTS: We identified 91 variants and observed waves of dominant variants transitioning from BA.2 to BA.2.12.1, BA.4&amp;5, BQ.1, and XBB.1.5. Comparison with clinical genome sequencing data revealed earlier detection of variants and identification of unreported outbreaks. Our results also showed strong consistency with clinical data for dominant variants at the local, state, and national levels. Alpha diversity analyses revealed significant seasonal variations, with the highest diversity observed in winter. By segmenting the outbreak into lag, growth, stationary, and decline phases, we found higher variant diversity during the lag phase, likely due to lower inter-variant competition preceding outbreak growth.<br><br>CONCLUSIONS: Our findings underscore the importance of low transmission periods in facilitating rapid mutation and variant evolution. Our approach, integrating RBD amplicon sequencing with wastewater surveillance, demonstrates effectiveness in tracking viral evolution and understanding variant emergence, thus enhancing public health preparedness.}, }
@article {pmid39341204, year = {2024}, author = {Takewaki, D and Kiguchi, Y and Masuoka, H and Manu, MS and Raveney, BJE and Narushima, S and Kurokawa, R and Ogata, Y and Kimura, Y and Sato, N and Ozawa, Y and Yagishita, S and Araki, T and Miyake, S and Sato, W and Suda, W and Yamamura, T}, title = {Tyzzerella nexilis strains enriched in mobile genetic elements are involved in progressive multiple sclerosis.}, journal = {Cell reports}, volume = {43}, number = {10}, pages = {114785}, doi = {10.1016/j.celrep.2024.114785}, pmid = {39341204}, issn = {2211-1247}, mesh = {Animals ; Humans ; *Encephalomyelitis, Autoimmune, Experimental/genetics/pathology ; Mice ; *Multiple Sclerosis/genetics/pathology/microbiology ; Female ; Interspersed Repetitive Sequences/genetics ; Male ; Gastrointestinal Microbiome/genetics ; Mice, Inbred C57BL ; Clostridiales/genetics ; Middle Aged ; Adult ; }, abstract = {Multiple sclerosis (MS) is an autoimmune-demyelinating disease with an inflammatory pathology formed by self-reactive lymphocytes with activated glial cells. Progressive MS, characterized by resistance to medications, significantly differs from the non-progressive form in gut microbiome profiles. After confirming an increased abundance of "Tyzzerella nexilis" in various cohorts of progressive MS, we identified a distinct cluster of T. nexilis strains enriched in progressive MS based on long-read metagenomics. The distinct T. nexilis cluster is characterized by a large number of mobile genetic elements (MGEs) and a lack of defense systems against MGEs. Microbial genes for sulfate reduction and flagella formation with pathogenic implications are specific to this cluster. Moreover, these flagellar genes are encoded on MGEs. Mono-colonization with MGE-enriched T. nexilis made germ-free mice more susceptible to experimental autoimmune encephalomyelitis. These results indicate that the progression of MS may be promoted by MGE-enriched T. nexilis with potentially pathogenic properties.}, }
@article {pmid39341154, year = {2024}, author = {Gough, EK and Edens, TJ and Carr, L and Robertson, RC and Mutasa, K and Ntozini, R and Chasekwa, B and Geum, HM and Baharmand, I and Gill, SK and Mutasa, B and Mbuya, MNN and Majo, FD and Tavengwa, N and Francis, F and Tome, J and Evans, C and Kosek, M and Prendergast, AJ and Manges, AR and , }, title = {Bifidobacterium longum and microbiome maturation modify a nutrient intervention for stunting in Zimbabwean infants.}, journal = {EBioMedicine}, volume = {108}, number = {}, pages = {105362}, pmid = {39341154}, issn = {2352-3964}, mesh = {Humans ; Infant ; *Gastrointestinal Microbiome ; *Growth Disorders/prevention &amp; control/microbiology ; Female ; Male ; Zimbabwe ; Fucosyltransferases/genetics ; Feces/microbiology ; Bifidobacterium ; Dietary Supplements ; Nutrients ; }, abstract = {BACKGROUND: Small-quantity lipid-based nutrient supplements (SQ-LNS), which has been widely tested to reduce child stunting, has largely modest effects to date, but the mechanisms underlying these modest effects are unclear. Child stunting is a longstanding indicator of chronic undernutrition and it remains a prevalent public health problem. The infant gut microbiome may be a key contributor to stunting; and mother and infant fucosyltransferase (FUT) phenotypes are important determinants of infant microbiome composition.<br><br>METHODS: We investigated whether mother-infant FUT status (n&#xa0;=&#xa0;792) and infant gut microbiome composition (n&#xa0;=&#xa0;354 fecal specimens from 172 infants) modified the impact of an infant and young child feeding (IYCF) intervention, that included SQ-LNS, on stunting at age 18 months in secondary analysis of a randomized trial in rural Zimbabwe.<br><br>FINDINGS: We found that the impact of the IYCF intervention on stunting was modified by: (i) mother-infant FUT2+/FUT3- phenotype (difference-in-differences&#xa0;-32.6% [95% CI:&#xa0;-55.3%,&#xa0;-9.9%]); (ii) changes in species composition that reflected microbiome maturation (difference-in-differences&#xa0;-68.1% [95% CI:&#xa0;-99.0%,&#xa0;-28.5%); and (iii) greater relative abundance of B.&#xa0;longum (differences-in-differences 49.1% [95% CI: 26.6%, 73.6%]). The dominant strains of B.&#xa0;longum when the intervention started were most similar to the proficient milk oligosaccharide utilizer subspecies infantis, which decreased with infant age and differed by mother-infant FUT2+/FUT3- phenotypes.<br><br>INTERPRETATION: These findings indicate that a persistently "younger" microbiome at initiation of the intervention reduced its benefits on stunting in areas with a high prevalence of growth restriction.<br><br>FUNDING: Bill and Melinda Gates Foundation, UK DFID/Aid, Wellcome Trust, Swiss Agency for Development and Cooperation, US National Institutes of Health, UNICEF, and Nutricia Research Foundation.}, }
@article {pmid39340684, year = {2024}, author = {Vinothini, K and Nakkeeran, S and Saranya, N and Jothi, P and Richard, JI and Perveen, K and Bukhari, NA and Glick, BR and Sayyed, RZ and Mastinu, A}, title = {Rhizosphere Engineering of Biocontrol Agents Enriches Soil Microbial Diversity and Effectively Controls Root-Knot Nematodes.}, journal = {Microbial ecology}, volume = {87}, number = {1}, pages = {120}, pmid = {39340684}, issn = {1432-184X}, mesh = {Animals ; *Solanum lycopersicum/microbiology/parasitology ; *Soil Microbiology ; *Rhizosphere ; *Bacillus/genetics/physiology ; *Plant Roots/microbiology/parasitology ; *Pest Control, Biological ; Plant Diseases/parasitology/prevention &amp; control/microbiology ; Trichoderma/physiology/genetics ; Tylenchoidea/physiology ; Microbiota ; Antinematodal Agents/pharmacology ; Biological Control Agents/pharmacology ; Bacteria/genetics/classification ; }, abstract = {The root-knot nematode (RKN) causes significant yield loss in tomatoes. Understanding the interaction of biocontrol agents (BCAs)-nematicides-soil microbiomes and RKNs is essential for enhancing the efficacy of biocontrol agents and nematicides to curb RKN damage to crops. The present study aimed to evaluate the in vitro effectiveness of BACa and nematicide against RKN and to apply the amplicon sequencing to assess the interaction of Bacillus velezensis (VB7) and Trichoderma koningiopsis (TK) against RKNs. Metagenomic analysis revealed the relative abundance of three phyla such as Proteobacteria (42.16%), Firmicutes (19.57%), and Actinobacteria (17.69%) in tomato rhizospheres. Those tomato rhizospheres treated with the combined application of B. velezensis VB7 + T. koningiopsis TK and RKN had a greater frequency of diversity and richness than the control. RKN-infested tomato rhizosphere drenched with bacterial and fungal antagonists had the maximum diversity index of bacterial communities. A strong correlation with a maximum number of interconnection edges in the phyla Proteobacteria, Firmicutes, and Actinobacteria was evident in soils treated with both B. velezensis VB7 and T. koningiopsis TK challenged against RKN in infected soil. The present study determined a much greater diversity of bacterial taxa observed in tomato rhizosphere soils treated with B. velezensis VB7 and T. koningiopsis TK than in untreated soil. It is suggested that the increased diversity and abundance of bacterial communities might be responsible for increased nematicidal properties in tomato plants. Hence, the combined applications of B. velezensis VB7 and T. koningiopsis TK can enhance the nematicidal action to curb RKN infecting tomatoes.}, }
@article {pmid39340212, year = {2024}, author = {Avellaneda-Franco, L and Xie, L and Nakai, M and Barr, JJ and Marques, FZ}, title = {Dietary fiber intake impacts gut bacterial and viral populations in a hypertensive mouse model.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2407047}, pmid = {39340212}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Dietary Fiber/administration &amp; dosage ; Mice ; Male ; *Hypertension/virology ; *Mice, Inbred C57BL ; *Bacteria/classification/genetics/isolation &amp; purification ; *Bacteriophages/physiology/genetics ; *Disease Models, Animal ; Angiotensin II/metabolism ; Genome, Viral ; }, abstract = {The gut microbiome is an emerging factor in preventing hypertension, yet the influence of gut bacteriophages, viruses infecting bacteria, on this condition remains unclear. Bacteriophage-bacteria interactions, which impact the gut microbiome, are influenced differentially by temperate and virulent bacteriophages. However, the standard technique for studying viral populations, viral-like particles (VLPs)-metagenomes, often overlook prophages, the intracellular stage of temperate bacteriophages, creating a knowledge gap. To address this, we investigated alterations in extracellular and intracellular bacteriophages, alongside bacterial populations, in the angiotensin II-hypertension model. We sequenced VLPs and bulk DNA from cecal-colonic samples collected from male C57BL/6J mice implanted with minipumps containing saline or angiotensin II. We assembled 106 bacterial and 816 viral genomes and found that gut viral and bacterial populations remained stable between hypertensive and normotensive mice. A higher number of temperate viruses were observed across all treatments. Although temperate viruses outnumbered virulent viruses, sequencing of both VLPs and bulk revealed that virions from virulent viruses were more abundant in the murine gut. We then evaluated the impact of low- and high-fiber intake on gut microbiome composition in the angiotensin II model. Fiber intake significantly influenced the gut microbiome composition and hypertension development. Mice receiving high-fiber had lower blood pressure, a higher bacterial-encoded carbohydrate-associated enzyme, and a higher total relative abundance of temperate viruses than those receiving low-fiber. Our findings suggest that phages are not associated with hypertension development in the angiotensin II model. However, they support a complex diet-bacteria/phage interaction that may be involved in blood pressure regulation.}, }
@article {pmid39338979, year = {2024}, author = {Opitz-Ríos, C and Burgos-Pacheco, A and Paredes-Cárcamo, F and Campanini-Salinas, J and Medina, DA}, title = {Metagenomics Insight into Veterinary and Zoonotic Pathogens Identified in Urban Wetlands of Los Lagos, Chile.}, journal = {Pathogens (Basel, Switzerland)}, volume = {13}, number = {9}, pages = {}, pmid = {39338979}, issn = {2076-0817}, support = {11230295//Agencia Nacional de Investigaci&#xf3;n y Desarrollo/ ; VRID_FAPPE21-07//Universidad San Sebasti&#xe1;n/ ; VRID_INTER23/02//Universidad San Sebasti&#xe1;n/ ; VRID_DocI22/06//Universidad San Sebasti&#xe1;n/ ; }, mesh = {*Wetlands ; *Metagenomics ; Animals ; Chile/epidemiology ; Humans ; Bacteria/genetics/isolation &amp; purification/pathogenicity/drug effects/classification ; Zoonoses/microbiology/transmission ; Drug Resistance, Bacterial/genetics ; Staphylococcus aureus/genetics/pathogenicity/drug effects/isolation &amp; purification ; Anti-Bacterial Agents/pharmacology ; Pseudomonas aeruginosa/genetics/pathogenicity/isolation &amp; purification/drug effects ; }, abstract = {Wetlands are ecosystems that are essential to ecological balance and biodiversity; nevertheless, human activity is a constant threat to them. Excess nutrients are caused by intensive livestock and agricultural operations, pollution, and population growth, which in turn leads to uncontrolled microbiological development. This impairment in water quality can constitute a risk to animal, human, and environmental health. To thoroughly characterize the microbial communities, shotgun metagenomics was used to characterize the taxonomic and functional pattern of microorganisms that inhabit urban wetlands in the Los Lagos Region of Chile. The main objective was to identify microorganisms of veterinary relevance, assess their potential antibiotic resistance, and characterize the main virulence mechanism. As expected, a high diversity of microorganisms was identified, including bacteria described as animal or human pathogens, such as Pasteurella multocida, Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli. Also, a diverse repertory of antimicrobial-resistant genes (ARGs) was detected in metagenomic assembled sequences and inside the sequence of mobile genetic elements, genes that confer mainly resistance to beta-lactams, consistent with the families of antibiotics most used in Chile. In addition, a diverse collection of virulence mechanisms was also identified. Given the significance of the relationship between environmental, animal, and human health-a concept known as One Health-there is a need to establish molecular surveillance programs that monitor the environmental biohazard elements using molecular tools. This work is the first report of the presence of these harmful biological elements in urban wetlands subjected to anthropogenic pressure, located in the south of Chile.}, }
@article {pmid39338129, year = {2024}, author = {Mayer, MH and Woldemariam, S and Gisinger, C and Dorner, TE}, title = {Association of Gut Microbiome with Muscle Mass, Muscle Strength, and Muscle Performance in Older Adults: A Systematic Review.}, journal = {International journal of environmental research and public health}, volume = {21}, number = {9}, pages = {}, pmid = {39338129}, issn = {1660-4601}, mesh = {Aged ; Aged, 80 and over ; Humans ; *Gastrointestinal Microbiome/physiology ; *Muscle Strength/physiology ; *Muscle, Skeletal/physiology ; *Sarcopenia/microbiology/physiopathology ; }, abstract = {Sarcopenia, characterized by reduced muscle mass, strength, or performance, is a common condition in older adults. The association between the gut microbiome and sarcopenia remains poorly understood. This systematic review aims to evaluate the relationship between muscle parameters and the intestinal microbiome. A systematic search was conducted in PubMed, EMBASE, Cochrane Library, and Google Scholar for studies published between 2002 and 2022 involving participants aged 50+. Studies were included if they assessed sarcopenia using at least one measure of muscle mass (skeletal muscle mass, bioelectrical impedance analysis, MRI), muscle strength, or muscle performance (SARC-F questionnaire, Timed-Up-and-Go Test, Chair Stand Test, grip strength, gait speed, Short Physical Performance Battery, 400 m Walk Test). The microbiome was measured using at least RNA/DNA sequencing or shotgun metagenomic sequencing. Twelve studies were analyzed. Findings revealed that a higher abundance of bacterial species such as Desulfovibrio piger, and Clostridium symbiosum and reduced diversity of butyrate-producing bacteria was associated with sarcopenia severity, as indicated by decreased grip strength, muscle mass, or physical performance. The gut microbiome plays a significant role in age-related muscle loss. Probiotics, prebiotics, and bacterial products could be potential interventions to improve muscle health in older adults.}, }
@article {pmid39334245, year = {2024}, author = {Van Herzele, C and Coppens, S and Vereecke, N and Theuns, S and de Graaf, DC and Nauwynck, H}, title = {New insights into honey bee viral and bacterial seasonal infection patterns using third-generation nanopore sequencing on honey bee haemolymph.}, journal = {Veterinary research}, volume = {55}, number = {1}, pages = {118}, pmid = {39334245}, issn = {1297-9716}, support = {1SB3123N//Fonds Wetenschappelijk Onderzoek/ ; Baekeland mandate HBC.2020.2889//Agentschap Innoveren en Ondernemen/ ; }, mesh = {Animals ; Bees/virology/microbiology ; *Seasons ; *Hemolymph/virology/microbiology ; Nanopore Sequencing/methods/veterinary ; Bacteria/genetics/isolation &amp; purification/classification ; Virome ; }, abstract = {Honey bees are rapidly declining, which poses a significant threat to our environment and agriculture industry. These vital insects face a disease complex believed to be caused by a combination of parasites, viruses, pesticides, and nutritional deficiencies. However, the real aetiology is still enigmatic. Due to the conventional analysis methods, we still lack complete insights into the honey bee virome and the presence of pathogenic bacteria. To fill this knowledge gap, we employed third-generation nanopore metagenomic sequencing on honey bee haemolymph to monitor the presence of pathogens over almost a year. This study provides valuable insights into the changes in bacterial and viral loads within honey bee colonies. We identified different pathogens in the honey bee haemolymph, which are not included in honey bee screenings. These pathogens comprise the Apis mellifera filamentous virus, Apis rhabdoviruses, and various bacteria such as Frischella sp. and Arsenophonus sp. Furthermore, a sharp contrast was observed between young and old bees. Our research proposes that transgenerational immune priming may play a role in shaping infection patterns in honey bees. We observed a significant increase in pathogen loads in the spring, followed by a notable decrease in pathogen presence during the summer and autumn months. However, certain pathogens seem to be able to evade this priming effect, making them particularly intriguing as potential factors contributing to mortality. In the future, we aim to expand our research on honey bee transgenerational immune priming and investigate its potential in natural settings. This knowledge will ultimately enhance honey bee health and decrease colony mortality.}, }
@article {pmid39333778, year = {2024}, author = {Msango, K and Gouda, MNR and Ramakrishnan, B and Kumar, A and Subramanian, S}, title = {Variation and functional profile of gut bacteria in the scarab beetle, Anomala dimidiata, under a cellulose-enriched microenvironment.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {22400}, pmid = {39333778}, issn = {2045-2322}, mesh = {Animals ; *Coleoptera/microbiology ; *Cellulose/metabolism ; *Gastrointestinal Microbiome ; *Bacteria/genetics/metabolism/classification/isolation &amp; purification ; Larva/microbiology ; RNA, Ribosomal, 16S/genetics ; Phylogeny ; Symbiosis ; }, abstract = {This study utilized cultivable methods and 16 S amplicon sequencing to compare taxonomic profiles and functional potential of gut bacteria in the scarab beetle, Anomola dimidiata, under cellulose-enriched conditions. Eight culturable cellulolytic gut bacteria were isolated from the midgut and hindgut of the scarab larvae, respectively. 16 S amplicon sequencing evinced that the most represented taxonomic profiles at phylum level in the fermentation chamber and midgut were Bacillota (71.62 and 56.76%), Pseudomonadota (22.66 and 36.89%) and Bacteroidota (2.7 and 2.81%). Bacillota (56.74 and 91.39%) were significantly enriched in the midgut with the addition of cellulose. In contrast, Bacillota and Psedomonadota were significantly enriched in the fermentation chamber. Carbohydrate metabolism was up-regulated in the midgut, while nitrogen and phosphorus metabolism were up-regulated in the fermentation chamber, suggesting these symbionts' possible metabolic roles to the host. An analysis of total cellulases as well as amplicon sequence variants indicated that the gut bacteria belonging to Acinetobacter, Bacillus, Brucella, Brevibacillus, Enterobacter, Lysinibacillus and Paenibacillus are involved in nutrition provisioning. These results have provided additional insights into the gut bacteria associated with cellulose digestion in A. dimidiata and created a platform for bioprospecting novel isolates to produce biomolecules for biotechnological use, besides identifying eco-friendly targets for its management.}, }
@article {pmid39333734, year = {2024}, author = {Ishak, S and Rondeau-Leclaire, J and Faticov, M and Roy, S and Laforest-Lapointe, I}, title = {Boreal moss-microbe interactions are revealed through metagenome assembly of novel bacterial species.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {22168}, pmid = {39333734}, issn = {2045-2322}, mesh = {*Bryophyta/microbiology ; *Bacteria/genetics/metabolism/classification ; *Metagenome ; Taiga ; Metagenomics/methods ; Microbiota ; Quebec ; Nitrogen Fixation ; Photosynthesis ; }, abstract = {Moss-microbe interactions contribute to ecosystem processes in boreal forests. Yet, how host-specific characteristics and the environment drive the composition and metabolic potential of moss microbiomes is still poorly understood. In this study, we use shotgun metagenomics to identify the taxonomy and metabolic potential of the bacteria of four moss species of the boreal forests of Northern Québec, Canada. To characterize moss bacterial community composition and diversity, we assembled the genomes of 110 potentially novel bacterial species. Our results highlight that moss genus, species, gametophyte section, and to a lesser extent soil pH and soil temperature, drive moss-associated bacterial community composition and diversity. In the brown gametophyte section, two Stigonema spp. showed partial pathway completeness for photosynthesis and nitrogen fixation, while all brown-associated Hyphomicrobiales had complete assimilatory nitrate reduction pathways and many nearly complete carbon fixation pathways. Several brown-associated species showed partial to complete pathways for coenzyme M and F420 biosynthesis, important for methane metabolism. In addition, green-associated Hyphomicrobiales (Methylobacteria spp.) displayed potential for the anoxygenic photosystem II pathway. Overall, our findings demonstrate how host-specific characteristics and environmental factors shape the composition and metabolic potential of moss bacteria, highlighting their roles in carbon fixation, nitrogen cycling, and methane metabolism in boreal forests.}, }
@article {pmid39333577, year = {2024}, author = {Zhao, B and Zi, M and Zhang, X and Wang, Y}, title = {Microbial communities and metagenomes in methane-rich deep coastal sediments.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1043}, pmid = {39333577}, issn = {2052-4463}, support = {U22B2012//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Methane/metabolism ; *Geologic Sediments/microbiology ; *Microbiota ; *Metagenome ; *Archaea/genetics ; *RNA, Ribosomal, 16S/genetics ; Phylogeny ; }, abstract = {Coastal sediments are rich in embedded recalcitrant organic carbons that are biotransformed into methane. In this study, gas composition (carbon dioxide, methane and nitrogen) and chemical indicators (total nitrogen, total carbon, and total sulfate) were examined in five deep sediment cores (up to 130 m in length) obtained from the Hangzhou Bay. The V3-V4 region of the 16S rRNA gene amplicons was amplified and sequenced for the prokaryotic community analysis. The species composition, along with the physicochemical factors of the sediments, revealed a strong correlation with methane content in one of the sediment cores. We then obtained metagenomes of the two sediment samples selected for their high methane content and enrichment of methanogenic Bathyarchaeota with phylogenetic evidence. A total of 27 draft genomes were retrieved through metagenomic binning methodologies and were classified into Bathyarchaeota, Asgard archaea, Planctomycetes, and other microbial groups. The data provided are valuable for understanding the relationship between methane generation and microbial community composition in deep sediment core samples from coastal to marine environments.}, }
@article {pmid39333527, year = {2024}, author = {Cheng, M and Xu, Y and Cui, X and Wei, X and Chang, Y and Xu, J and Lei, C and Xue, L and Zheng, Y and Wang, Z and Huang, L and Zheng, M and Luo, H and Leng, Y and Jiang, C}, title = {Deep longitudinal lower respiratory tract microbiome profiling reveals genome-resolved functional and evolutionary dynamics in critical illness.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8361}, pmid = {39333527}, issn = {2041-1723}, mesh = {Humans ; *Critical Illness ; *Microbiota/genetics ; *Intensive Care Units ; *Metagenome/genetics ; Metagenomics/methods ; Longitudinal Studies ; Male ; Female ; Plasmids/genetics ; Genome, Bacterial/genetics ; Respiratory System/microbiology ; Aged ; Middle Aged ; Bacteria/genetics/classification/isolation &amp; purification ; Pneumonia/microbiology ; Evolution, Molecular ; }, abstract = {The lower respiratory tract (LRT) microbiome impacts human health, especially among critically ill patients. However, comprehensive characterizations of the LRT microbiome remain challenging due to low microbial mass and host contamination. We develop a chelex100-based low-biomass microbial-enrichment method (CMEM) that enables deep metagenomic profiling of LRT samples to recover near-complete microbial genomes. We apply the method to 453 longitudinal LRT samples from 157 intensive care unit (ICU) patients in three geographically distant hospitals. We recover 120 high-quality metagenome-assembled genomes (MAGs) and associated plasmids without culturing. We detect divergent longitudinal microbiome dynamics and hospital-specific dominant opportunistic pathogens and resistomes in pneumonia patients. Diagnosed pneumonia and the ICU stay duration were associated with the abundance of specific antibiotic-resistance genes (ARGs). Moreover, CMEM can serve as a robust tool for genome-resolved analyses. MAG-based analyses reveal strain-specific resistome and virulome among opportunistic pathogen strains. Evolutionary analyses discover increased mobilome in prevailing opportunistic pathogens, highly conserved plasmids, and new recombination hotspots associated with conjugative elements and prophages. Integrative analysis with epidemiological data reveals frequent putative inter-patient strain transmissions in ICUs. In summary, we present a genome-resolved functional, transmission, and evolutionary landscape of the LRT microbiota in critically ill patients.}, }
@article {pmid39333204, year = {2024}, author = {Martin Říhová, J and Gupta, S and Nováková, E and Hypša, V}, title = {Fur microbiome as a putative source of symbiotic bacteria in sucking lice.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {22326}, pmid = {39333204}, issn = {2045-2322}, support = {GA20-07674S//Grantov&#xe1; Agentura &#x10c;esk&#xe9; Republiky/ ; }, mesh = {Animals ; *Symbiosis ; *Microbiota ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Phthiraptera/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {Symbiosis between insects and bacteria has been established countless times. While it is well known that the symbionts originated from a variety of different bacterial taxa, it is usually difficult to determine their environmental source and a route of their acquisition by the host. In this study, we address this question using a model of Neisseriaceae symbionts in rodent lice. These bacteria established their symbiosis independently with different louse taxa (Polyplax, Hoplopleura, Neohaematopinus), most likely from the same environmental source. We first applied amplicon analysis to screen for candidate source bacterium in the louse environment. Since lice are permanent ectoparasites, often specific to the particular host, we screened various microbiomes associated with three rodent species (Microtus arvalis, Clethrionomys glareolus, and Apodemus flavicollis). The analyzed samples included fur, skin, spleen, and other ectoparasites sampled from these rodents. The fur microbiome data revealed a Neisseriaceae bacterium, closely related to the known louse symbionts. The draft genomes of the environmental Neisseriaceae, assembled from all three rodent hosts, converged to a remarkably small size of approximately 1.4 Mbp, being even smaller than the genomes of the related symbionts. Our results suggest that the rodent fur microbiome can serve as a source for independent establishment of bacterial symbiosis in associated louse species. We further propose a hypothetical scenario of the genome evolution during the transition of a free-living bacterium to the member of the rodent fur-associated microbiome and subsequently to the facultative and obligate louse symbionts.}, }
@article {pmid39333145, year = {2024}, author = {Boie, W and Schemmel, M and Ye, W and Hasler, M and Goll, M and Verreet, JA and Cai, D}, title = {An assessment of the species diversity and disease potential of Pythium communities in Europe.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8369}, pmid = {39333145}, issn = {2041-1723}, support = {031B0910-A//Bundesministerium f&#xfc;r Bildung und Forschung (Federal Ministry of Education and Research)/ ; 221NR-058B//Fachagentur Nachwachsende Rohstoffe (Agency for Renewable Resources)/ ; }, mesh = {*Pythium/genetics/isolation &amp; purification ; Europe ; *Plant Diseases/microbiology ; *Zea mays/microbiology ; Soil Microbiology ; Biodiversity ; Metagenomics/methods ; }, abstract = {Pythium sensu lato (s.l.) is a genus of parasitic oomycetes that poses a serious threat to agricultural production worldwide, but their severity is often neglected because little knowledge about them is available. Using an internal transcribed spacer (ITS) amplicon-based-metagenomics approach, we investigate the occurrence, abundance, and diversity of Pythium spp. s.l. in 127 corn fields of 11 European countries from the years 2019 to 2021. We also identify 73 species, with up to 20 species in a single soil sample, and the prevalent species, which show high species diversity, varying disease potential, and are widespread in most countries. Further, we show species-species co-occurrence patterns considering all detected species and link species abundance to soil parameter using the LUCAS topsoil dataset. Infection experiments with recovered isolates show that Pythium s.l. differ in disease potential, and that effective interference with plant hormone networks suppressing JA (jasmonate)-mediated defenses is an essential component of the virulence mechanism of Pythium s.l. species. This study provides a valuable dataset that enables deep insights into the structure and species diversity of Pythium s.l. communities in European corn fields and knowledge for better understanding plant-Pythium interactions, facilitating the development of an effective strategy to cope with this pathogen.}, }
@article {pmid39331712, year = {2024}, author = {Fellows, RC and Chun, SK and Larson, N and Fortin, BM and Mahieu, AL and Song, WA and Seldin, MM and Pannunzio, NR and Masri, S}, title = {Disruption of the intestinal clock drives dysbiosis and impaired barrier function in colorectal cancer.}, journal = {Science advances}, volume = {10}, number = {39}, pages = {eado1458}, pmid = {39331712}, issn = {2375-2548}, support = {R01 CA244519/CA/NCI NIH HHS/United States ; R01 CA259370/CA/NCI NIH HHS/United States ; R01 CA276470/CA/NCI NIH HHS/United States ; R37 CA266042/CA/NCI NIH HHS/United States ; }, mesh = {Animals ; *Colorectal Neoplasms/microbiology/metabolism/pathology ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology ; Mice ; *Circadian Clocks/genetics ; Intestinal Mucosa/metabolism/microbiology ; Disease Models, Animal ; Humans ; Permeability ; }, abstract = {Diet is a robust entrainment cue that regulates diurnal rhythms of the gut microbiome. We and others have shown that disruption of the circadian clock drives the progression of colorectal cancer (CRC). While certain bacterial species have been suggested to play driver roles in CRC, it is unknown whether the intestinal clock impinges on the microbiome to accelerate CRC pathogenesis. To address this, genetic disruption of the circadian clock, in an Apc-driven mouse model of CRC, was used to define the impact on the gut microbiome. When clock disruption is combined with CRC, metagenomic sequencing identified dysregulation of many bacterial genera including Bacteroides, Helicobacter, and Megasphaera. We identify functional changes to microbial pathways including dysregulated nucleic acid, amino acid, and carbohydrate metabolism, as well as disruption of intestinal barrier function. Our findings suggest that clock disruption impinges on microbiota composition and intestinal permeability that may contribute to CRC pathogenesis.}, }
@article {pmid39331699, year = {2024}, author = {Yang, Z and Shan, Y and Liu, X and Chen, G and Pan, Y and Gou, Q and Zou, J and Chang, Z and Zeng, Q and Yang, C and Kong, J and Sun, Y and Li, S and Zhang, X and Wu, WC and Li, C and Peng, H and Holmes, EC and Guo, D and Shi, M}, title = {VirID: Beyond Virus Discovery-An Integrated Platform for Comprehensive RNA Virus Characterization.}, journal = {Molecular biology and evolution}, volume = {41}, number = {10}, pages = {}, pmid = {39331699}, issn = {1537-1719}, support = {82341118//National Natural Science Foundation of China/ ; 2022A1515011854//Natural Science Foundation of Guangdong Province of China/ ; JCYJ20210324124414040//Shenzhen Science and Technology Program/ ; //Hong Kong Innovation and Technology Fund (ITF/ ; GZNL2023A01001//Major Project of Guangzhou National Laboratory/ ; 2019ZT08Y464//Guangdong Province "Pearl River Talent Plan" Innovation, Entrepreneurship Team Project/ ; ZDSYS20220606100803007//Fund of Shenzhen Key Laboratory/ ; GNT2017197//NHMRC (Australia) Investigator Award/ ; //Innovation and Technology Commission, Hong Kong Special Administrative Region, China/ ; }, mesh = {*RNA Viruses/genetics ; *Software ; *Metagenomics/methods ; *Phylogeny ; Humans ; RNA-Dependent RNA Polymerase/genetics ; Computational Biology/methods ; }, abstract = {RNA viruses exhibit vast phylogenetic diversity and can significantly impact public health and agriculture. However, current bioinformatics tools for viral discovery from metagenomic data frequently generate false positive virus results, overestimate viral diversity, and misclassify virus sequences. Additionally, current tools often fail to determine virus-host associations, which hampers investigation of the potential threat posed by a newly detected virus. To address these issues we developed VirID, a software tool specifically designed for the discovery and characterization of RNA viruses from metagenomic data. The basis of VirID is a comprehensive RNA-dependent RNA polymerase database to enhance a workflow that includes RNA virus discovery, phylogenetic analysis, and phylogeny-based virus characterization. Benchmark tests on a simulated data set demonstrated that VirID had high accuracy in profiling viruses and estimating viral richness. In evaluations with real-world samples, VirID was able to identify RNA viruses of all types, but also provided accurate estimations of viral genetic diversity and virus classification, as well as comprehensive insights into virus associations with humans, animals, and plants. VirID therefore offers a robust tool for virus discovery and serves as a valuable resource in basic virological studies, pathogen surveillance, and early warning systems for infectious disease outbreaks.}, }
@article {pmid39329490, year = {2024}, author = {Maday, SDM and Kingsbury, JM and Weaver, L and Pantos, O and Wallbank, JA and Doake, F and Masterton, H and Hopkins, M and Dunlop, R and Gaw, S and Theobald, B and Risani, R and Abbel, R and Smith, D and Handley, KM and Lear, G}, title = {Taxonomic variation, plastic degradation, and antibiotic resistance traits of plastisphere communities in the maturation pond of a wastewater treatment plant.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {10}, pages = {e0071524}, pmid = {39329490}, issn = {1098-5336}, support = {C03X1802//Ministry of Business, Innovation and Employment (MBIE)/ ; }, mesh = {*Plastics ; *Wastewater/microbiology ; *Ponds/microbiology ; *Bacteria/genetics/classification/drug effects/isolation &amp; purification ; *Biodegradation, Environmental ; *RNA, Ribosomal, 16S/genetics ; Biofilms/drug effects/growth &amp; development ; Microbiota/drug effects ; Drug Resistance, Microbial/genetics ; Waste Disposal, Fluid ; Water Pollutants, Chemical/analysis ; Water Purification ; }, abstract = {Wastewater treatment facilities can filter out some plastics before they reach the open environment, yet microplastics often persist throughout these systems. As they age, microplastics in wastewater may both leach and sorb pollutants and fragment to provide an increased surface area for bacterial attachment and conjugation, possibly impacting antimicrobial resistance (AMR) traits. Despite this, little is known about the effects of persistent plastic pollution on microbial functioning. To address this knowledge gap, we deployed five different artificially weathered plastic types and a glass control into the final maturation pond of a municipal wastewater treatment plant in Ōtautahi-Christchurch, Aotearoa/New Zealand. We sampled the plastic-associated biofilms (plastisphere) at 2, 6, 26, and 52 weeks, along with the ambient pond water, at three different depths (20, 40, and 60 cm from the pond water surface). We investigated the changes in plastisphere microbial diversity and functional potential through metagenomic sequencing. Bacterial 16S ribosomal RNA genes composition did not vary among plastic types and glass controls (P = 0.997) but varied among sampling times [permutational multivariate analysis of variance (PERMANOVA), P = 0.001] and depths (PERMANOVA, P = 0.011). Overall, there was no polymer-substrate specificity evident in the total composition of genes (PERMANOVA, P = 0.67), but sampling time (PERMANOVA, P = 0.002) and depth were significant factors (PERMANOVA, P = 0.001). The plastisphere housed diverse AMR gene families, potentially influenced by biofilm-meditated conjugation. The plastisphere also harbored an increased abundance of genes associated with the biodegradation of nylon, or nylon-associated substances, including nylon oligomer-degrading enzymes and hydrolases.IMPORTANCEPlastic pollution is pervasive and ubiquitous. Occurrences of plastics causing entanglement or ingestion, the leaching of toxic additives and persistent organic pollutants from environmental plastics, and their consequences for marine macrofauna are widely reported. However, little is known about the effects of persistent plastic pollution on microbial functioning. Shotgun metagenomics sequencing provides us with the necessary tools to examine broad-scale community functioning to further investigate how plastics influence microbial communities. This study provides insight into the functional consequence of continued exposure to waste plastic by comparing the prokaryotic functional potential of biofilms on five types of plastic [linear low-density polyethylene (LLDPE), nylon-6, polyethylene terephthalate, polylactic acid, and oxygen-degradable LLDPE], glass, and ambient pond water over 12 months and at different depths (20, 40, and 60 cm) within a tertiary maturation pond of a municipal wastewater treatment plant.}, }
@article {pmid39329142, year = {2024}, author = {Khomutovska, N and Jasser, I and Sarapultseva, P and Spirina, V and Zaitsev, A and Masłowiecka, J and Isidorov, VA}, title = {Seasonal dynamics in leaf litter decomposing microbial communities in temperate forests: a whole-genome- sequencing-based study.}, journal = {PeerJ}, volume = {12}, number = {}, pages = {e17769}, pmid = {39329142}, issn = {2167-8359}, mesh = {*Plant Leaves/microbiology/metabolism ; *Forests ; *Seasons ; *Microbiota/genetics/physiology ; Bacteria/genetics/classification/metabolism ; Fungi/genetics/classification/metabolism/isolation &amp; purification ; Whole Genome Sequencing ; Metagenome/genetics ; Trees/microbiology ; }, abstract = {Leaf litter decomposition, a crucial component of the global carbon cycle, relies on the pivotal role played by microorganisms. However, despite their ecological importance, leaf-litter-decomposing microorganism taxonomic and functional diversity needs additional study. This study explores the taxonomic composition, dynamics, and functional role of microbial communities that decompose leaf litter of forest-forming tree species in two ecologically unique regions of Europe. Twenty-nine microbial metagenomes isolated from the leaf litter of eight forest-forming species of woody plants were investigated by Illumina technology using read- and assembly-based approaches of sequences analysis. The taxonomic structure of the microbial community varies depending on the stage of litter decomposition; however, the community's core is formed by Pseudomonas, Sphingomonas, Stenotrophomonas, and Pedobacter genera of Bacteria and by Aureobasidium, Penicillium, Venturia genera of Fungi. A comparative analysis of the taxonomic structure and composition of the microbial communities revealed that in both regions, seasonal changes in structure take place; however, there is no clear pattern in its dynamics. Functional gene analysis of MAGs revealed numerous metabolic profiles associated with leaf litter degradation. This highlights the diverse metabolic capabilities of microbial communities and their implications for ecosystem processes, including the production of volatile organic compounds (VOCs) during organic matter decomposition. This study provides important advances in understanding of ecosystem processes and the carbon cycle, underscoring the need to unravel the intricacies of microbial communities within these contexts.}, }
@article {pmid39327897, year = {2024}, author = {Dai, Z and Wang, H and Xu, J and Lu, X and Ni, P and Yang, S and Shen, Q and Wang, X and Li, W and Wang, X and Zhou, C and Zhang, W and Shan, T}, title = {Unveiling the Virome of Wild Birds: Exploring CRESS-DNA Viral Dark Matter.}, journal = {Genome biology and evolution}, volume = {16}, number = {10}, pages = {}, pmid = {39327897}, issn = {1759-6653}, support = {2023YFD1801301//National Key Research and Development Programs of China/ ; 82341106//National Natural Science Foundation of China/ ; 20229152//The Special Funds for Science Development of the Clinical Teaching Hospitals of Jiangsu Vocational College of Medicine/ ; }, mesh = {Animals ; *Birds/virology ; *Virome/genetics ; *DNA Viruses/genetics/classification ; Phylogeny ; Animals, Wild/virology ; Metagenomics ; DNA, Viral/genetics ; }, abstract = {Amid global health concerns and the constant threat of zoonotic diseases, this study delves into the diversity of circular replicase-encoding single-stranded DNA (CRESS-DNA) viruses within Chinese wild bird populations. Employing viral metagenomics to tackle the challenge of "viral dark matter," the research collected and analyzed 3,404 cloacal swab specimens across 26 bird families. Metagenomic analysis uncovered a rich viral landscape, with 67.48% of reads classified as viral dark matter, spanning multiple taxonomic levels. Notably, certain viral families exhibited host-specific abundance patterns, with Galliformes displaying the highest diversity. Diversity analysis categorized samples into distinct groups, revealing significant differences in viral community structure, particularly noting higher diversity in terrestrial birds compared to songbirds and unique diversity in migratory birds versus perching birds. The identification of ten novel Circoviridae viruses, seven Smacoviridae viruses, and 167 Genomoviridae viruses, along with 100 unclassified CRESS-DNA viruses, underscores the expansion of knowledge on avian-associated circular DNA viruses. Phylogenetic and structural analyses of Rep proteins offered insights into evolutionary relationships and potential functional variations among CRESS-DNA viruses. In conclusion, this study significantly enhances our understanding of the avian virome, shedding light on the intricate relationships between viral communities and host characteristics in Chinese wild bird populations. The diverse array of CRESS-DNA viruses discovered opens avenues for future research into viral evolution, spread factors, and potential ecosystem impacts.}, }
@article {pmid39327438, year = {2024}, author = {Schmartz, GP and Rehner, J and Gund, MP and Keller, V and Molano, LG and Rupf, S and Hannig, M and Berger, T and Flockerzi, E and Seitz, B and Fleser, S and Schmitt-Grohé, S and Kalefack, S and Zemlin, M and Kunz, M and Götzinger, F and Gevaerd, C and Vogt, T and Reichrath, J and Diehl, L and Hecksteden, A and Meyer, T and Herr, C and Gurevich, A and Krug, D and Hegemann, J and Bozhueyuek, K and Gulder, TAM and Fu, C and Beemelmanns, C and Schattenberg, JM and Kalinina, OV and Becker, A and Unger, M and Ludwig, N and Seibert, M and Stein, ML and Hanna, NL and Martin, MC and Mahfoud, F and Krawczyk, M and Becker, SL and Müller, R and Bals, R and Keller, A}, title = {Decoding the diagnostic and therapeutic potential of microbiota using pan-body pan-disease microbiomics.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8261}, pmid = {39327438}, issn = {2041-1723}, mesh = {Humans ; *Microbiota/genetics ; *Metagenome/genetics ; *Metagenomics/methods ; Bacteria/genetics/isolation &amp; purification/classification ; Feces/microbiology ; Male ; Female ; Multigene Family ; Saliva/microbiology ; Adult ; }, abstract = {The human microbiome emerges as a promising reservoir for diagnostic markers and therapeutics. Since host-associated microbiomes at various body sites differ and diseases do not occur in isolation, a comprehensive analysis strategy highlighting the full potential of microbiomes should include diverse specimen types and various diseases. To ensure robust data quality and comparability across specimen types and diseases, we employ standardized protocols to generate sequencing data from 1931 prospectively collected specimens, including from saliva, plaque, skin, throat, eye, and stool, with an average sequencing depth of 5.3 gigabases. Collected from 515 patients, these samples yield an average of 3.7 metagenomes per patient. Our results suggest significant microbial variations across diseases and specimen types, including unexpected anatomical sites. We identify 583 unexplored species-level genome bins (SGBs) of which 189 are significantly disease-associated. Of note, the existence of microbial resistance genes in one specimen was indicative of the same resistance genes in other specimens of the same patient. Annotated and previously undescribed SGBs collectively harbor 28,315 potential biosynthetic gene clusters (BGCs), with 1050 significant correlations to diseases. Our combinatorial approach identifies distinct SGBs and BGCs, emphasizing the value of pan-body pan-disease microbiomics as a source for diagnostic and therapeutic strategies.}, }
@article {pmid39327429, year = {2024}, author = {Schmartz, GP and Rehner, J and Schuff, MJ and Molano, LG and Becker, SL and Krawczyk, M and Tagirdzhanov, A and Gurevich, A and Francke, R and Müller, R and Keller, V and Keller, A}, title = {Exploring microbial diversity and biosynthetic potential in zoo and wildlife animal microbiomes.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8263}, pmid = {39327429}, issn = {2041-1723}, support = {469073465//Deutsche Forschungsgemeinschaft (German Research Foundation)/ ; }, mesh = {Animals ; *Animals, Wild/microbiology ; *Animals, Zoo/microbiology ; *Gastrointestinal Microbiome/genetics ; *Anti-Bacterial Agents/pharmacology ; *Microbiota/genetics/drug effects ; Bacteria/genetics/metabolism/classification/drug effects ; Multigene Family ; Humans ; Biodiversity ; Drug Resistance, Bacterial/genetics ; Vancomycin/pharmacology ; Biosynthetic Pathways/genetics ; }, abstract = {Understanding human, animal, and environmental microbiota is essential for advancing global health and combating antimicrobial resistance (AMR). We investigate the oral and gut microbiota of 48 animal species in captivity, comparing them to those of wildlife animals. Specifically, we characterize the microbiota composition, metabolic pathways, AMR genes, and biosynthetic gene clusters (BGCs) encoding the production of specialized metabolites. Our results reveal a high diversity of microbiota, with 585 novel species-level genome bins (SGBs) and 484 complete BGCs identified. Functional gene analysis of microbiomes shows diet-dependent variations. Furthermore, by comparing our findings to wildlife-derived microbiomes, we observe the impact of captivity on the animal microbiome, including examples of converging microbiome compositions. Importantly, our study identifies AMR genes against commonly used veterinary antibiotics, as well as resistance to vancomycin, a critical antibiotic in human medicine. These findings underscore the importance of the 'One Health' approach and the potential for zoonotic transmission of pathogenic bacteria and AMR. Overall, our study contributes to a better understanding of the complexity of the animal microbiome and highlights its BGC diversity relevant to the discovery of novel antimicrobial compounds.}, }
@article {pmid39327011, year = {2024}, author = {Ruff, SE and Schwab, L and Vidal, E and Hemingway, JD and Kraft, B and Murali, R}, title = {Widespread occurrence of dissolved oxygen anomalies, aerobic microbes, and oxygen-producing metabolic pathways in apparently anoxic environments.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {11}, pages = {}, pmid = {39327011}, issn = {1574-6941}, support = {RGEC34/2023//Human Frontier Science Program/ ; 824763//Simons Foundation/ ; 946150/ERC_/European Research Council/International ; }, mesh = {*Oxygen/metabolism ; *Metabolic Networks and Pathways ; Groundwater/microbiology ; Phylogeny ; Bacteria/metabolism/genetics/classification ; Ecosystem ; Anaerobiosis ; }, abstract = {Nearly all molecular oxygen (O2) on Earth is produced via oxygenic photosynthesis by plants or photosynthetically active microorganisms. Light-independent O2 production, which occurs both abiotically, e.g. through water radiolysis, or biotically, e.g. through the dismutation of nitric oxide or chlorite, has been thought to be negligible to the Earth system. However, recent work indicates that O2 is produced and consumed in dark and apparently anoxic environments at a much larger scale than assumed. Studies have shown that isotopically light O2 can accumulate in old groundwaters, that strictly aerobic microorganisms are present in many apparently anoxic habitats, and that microbes and metabolisms that can produce O2 without light are widespread and abundant in diverse ecosystems. Analysis of published metagenomic data reveals that the enzyme putatively capable of nitric oxide dismutation forms four major phylogenetic clusters and occurs in at least 16 bacterial phyla, most notably the Bacteroidota. Similarly, a re-analysis of published isotopic signatures of dissolved O2 in groundwater suggests in situ production in up to half of the studied environments. Geochemical and microbiological data support the conclusion that "dark oxygen production" is an important and widespread yet overlooked process in apparently anoxic environments with far-reaching implications for subsurface biogeochemistry and ecology.}, }
@article {pmid39326312, year = {2025}, author = {Wang, X and Cui, J and Gu, Z and Guo, L and Liu, R and Guo, Y and Qin, N and Yang, Y}, title = {Aged garlic oligosaccharides modulate host metabolism and gut microbiota to alleviate high-fat and high-cholesterol diet-induced atherosclerosis in ApoE[-/-] mice.}, journal = {Food chemistry}, volume = {463}, number = {Pt 3}, pages = {141409}, doi = {10.1016/j.foodchem.2024.141409}, pmid = {39326312}, issn = {1873-7072}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Atherosclerosis/metabolism/microbiology/drug therapy ; Mice ; *Oligosaccharides/pharmacology/administration &amp; dosage/metabolism ; *Diet, High-Fat/adverse effects ; Male ; *Apolipoproteins E/genetics/metabolism ; *Garlic/chemistry ; Mice, Inbred C57BL ; Bacteria/isolation &amp; purification/classification/genetics/metabolism/drug effects ; Humans ; Mice, Knockout ; Fatty Acids, Volatile/metabolism ; Feces/microbiology/chemistry ; }, abstract = {Atherosclerosis (AS) is a cardiovascular disease caused by excessive accumulation of lipids in arterial walls. In this study, we developed an AS model in ApoE[-/-] mice using a high-fat, high-cholesterol diet and investigated the anti-AS mechanism of aged garlic oligosaccharides (AGOs) by focusing on the gut microbiota. Results revealed that AGOs exhibited significant anti-AS effects, reduced trimethylamine N-oxide levels from 349.9 to 189.2 ng/mL, and reduced aortic lipid deposition from 31.7 % to 9.5 %. AGOs significantly increased the levels of short-chain fatty acids in feces, in which acetic, propionic, and butyric acids were increased from 1.580, 0.364, and 0.469 mg/g to 2.233, 0.774, and 0.881 mg/g, respectively. An analysis of the gut microbiota indicated that AGOs restored alpha and beta diversity, decreased the Firmicutes/Bacteroidetes ratio, and promoted the dominance of the genus Akkermansia. A metagenomic analysis revealed that AGOs alleviated AS through the ABC transporter pathway and the lipopolysaccharide biosynthesis pathway.}, }
@article {pmid39324818, year = {2024}, author = {Li, F and Jia, M and Chen, H and Chen, M and Su, R and Usman, S and Ding, Z and Hao, L and Franco, M and Guo, X}, title = {Responses of microbial community composition and CAZymes encoding gene enrichment in ensiled Elymus nutans to altitudinal gradients in alpine region.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {10}, pages = {e0098624}, pmid = {39324818}, issn = {1098-5336}, support = {U20A2002//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {*Altitude ; *Silage/microbiology/analysis ; *Microbiota ; *Bacteria/genetics/classification/isolation &amp; purification ; *Elymus/microbiology/genetics ; Fermentation ; Tibet ; Acetic Acid/metabolism ; }, abstract = {UNLABELLED: High-throughput metagenomic sequence technology was employed to evaluate changes in microbial community composition and carbohydrate-active enzymes encoding gene enrichment status in Elymus nutans silages to altitudinal gradients in the world's highest alpine region of Qinghai-Tibetan Plateau (QTP). E. nutans were collected from three different altitudes in QTP: 2,600 m (low altitude), 3600 m (moderate altitude), and 4,600 m [high (H) altitude], and ensiled for 7, 14, 30, and 60 d. Results indicated an improvement in silage quality with the increasing altitude, although the acetic acid concentration and dry matter loss were greater in H altitude silages after 30 d of ensiling. Harmful bacteria or potential pathogens predominated in the microbial community on d 7 and 14 of fermentation, while genera belonging to lactic acid bacteria gradually became the main microorganisms with the increasing altitude on d 30 and 60 of ensiling. The abundance of carbohydrate-active enzymes genes responsible for macromolecular carbohydrate degradation in silage increased with increasing altitude, and those genes were mainly carried by Lactiplantibacillus and Pediococcus at 30 and 60 d of ensiling. The abundance of key enzymatic genes associated with glycolysis and organic acid production in carbohydrate metabolism pathway was higher in H altitude silages, and Lactiplantibacillus and Pediococcus were also the main hosts after 30 d of silage fermentation, except for the fact that acetic acid production was also related to genera Leuconostoc, Latilactobacillus, and Levilactobacillus.<br><br>IMPORTANCE: The fermentation quality of Elymus nutans silage was getting better with the increase of altitude in the Qinghai-Tibetan Plateau. The abundance of hosts carrying carbohydrate-active enzymes genes and key enzyme genes related to organic acid production increased with increasing altitude during the later stages of fermentation. Lactiplantibacillus and Pediococcus were the core microorganisms responsible for both polysaccharide hydrolysis and silage fermentation in the late stage of ensiling. This study provided insights on the influence of different altitudes on the composition and function of silage microbiome in the Qinghai-Tibetan Plateau, and provided a reference approach for improving the quality and controllability of silage production in high altitude areas of the Qinghai-Tibetan Plateau.}, }
@article {pmid39324627, year = {2024}, author = {Bigatton, ED and Verdenelli, RA and Haro, RJ and Ayoub, I and Barbero, FM and Martín, MP and Dubini, LE and Jorrín Novo, JV and Lucini, EI and Castillejo, M&#xc1;}, title = {Metagenomic Analysis to Assess the Impact of Plant Growth-Promoting Rhizobacteria on Peanut (Arachis hypogaea L.) Crop Production and Soil Enzymes and Microbial Diversity.}, journal = {Journal of agricultural and food chemistry}, volume = {72}, number = {40}, pages = {22385-22397}, pmid = {39324627}, issn = {1520-5118}, mesh = {*Arachis/microbiology/growth &amp; development/metabolism/genetics ; *Soil Microbiology ; *Bacillus/genetics/metabolism ; *Bradyrhizobium/genetics/metabolism/growth &amp; development/physiology ; *Pseudomonas/genetics/physiology/growth &amp; development ; *Metagenomics ; *Rhizosphere ; *Soil/chemistry ; Crop Production/methods ; Bacteria/genetics/classification/metabolism/enzymology/isolation &amp; purification ; Biodiversity ; Nitrogen Fixation ; Plant Roots/microbiology/growth &amp; development/metabolism ; }, abstract = {Peanut production could be increased through plant growth-promoting rhizobacteria (PGPR). In this regard, the present field research aimed at elucidating the impact of PGPR on peanut yield, soil enzyme activity, microbial diversity, and structure. Three PGPR strains (Bacillus velezensis, RI3; Bacillus velezensis, SC6; Pseudomonas psychrophila, P10) were evaluated, along with Bradyrhizobium japonicum (BJ), taken as a control. PGPR increased seed yield by 8%, improving the radiation use efficiency (4-14%). PGPR modified soil enzymes (fluorescein diacetate activity by 17% and dehydrogenase activity by 28%) and microbial abundance (12%). However, PGPR did not significantly alter microbial diversity; nonetheless, it modified the relative abundance of key phyla (Actinobacteria > Proteobacteria > Firmicutes) and genera (Bacillus > Arthrobacter > Pseudomonas). PGPRs modified the relative abundance of genes associated with N-fixation and nitrification while increasing genes related to N-assimilation and N-availability. PGPR improved agronomic traits without altering rhizosphere diversity.}, }
@article {pmid39322959, year = {2024}, author = {Wirbel, J and Essex, M and Forslund, SK and Zeller, G}, title = {A realistic benchmark for differential abundance testing and confounder adjustment in human microbiome studies.}, journal = {Genome biology}, volume = {25}, number = {1}, pages = {247}, pmid = {39322959}, issn = {1474-760X}, mesh = {Humans ; *Microbiota ; *Benchmarking ; RNA, Ribosomal, 16S/genetics ; Computer Simulation ; }, abstract = {BACKGROUND: In microbiome disease association studies, it is a fundamental task to test which microbes differ in their abundance between groups. Yet, consensus on suitable or optimal statistical methods for differential abundance testing is lacking, and it remains unexplored how these cope with confounding. Previous differential abundance benchmarks relying on simulated datasets did not quantitatively evaluate the similarity to real data, which undermines their recommendations.<br><br>RESULTS: Our simulation framework implants calibrated signals into real taxonomic profiles, including signals mimicking confounders. Using several whole&#xa0;meta-genome and 16S rRNA gene amplicon datasets, we validate that our simulated data resembles real data from disease association studies much more than in previous benchmarks. With extensively parametrized simulations, we benchmark the performance of nineteen differential abundance methods and further evaluate the best ones on confounded simulations. Only classic statistical methods (linear models, the Wilcoxon test, t-test), limma, and fastANCOM properly control false discoveries at relatively high sensitivity. When additionally considering confounders, these issues are exacerbated, but we find that adjusted differential abundance testing can effectively mitigate them. In a large cardiometabolic disease dataset, we showcase that failure to account for covariates such as medication causes spurious association in real-world applications.<br><br>CONCLUSIONS: Tight error control is critical for microbiome association studies. The unsatisfactory performance of many differential abundance methods and the persistent danger of unchecked confounding suggest these contribute to a lack of reproducibility among such studies. We have open-sourced our simulation and benchmarking software to foster a much-needed consolidation of statistical methodology for microbiome research.}, }
@article {pmid39322110, year = {2024}, author = {Liu, K and Li, Y and Ge, Z and Huang, D and Zhang, J}, title = {Microbial communities and mobile genetic elements determine the variations of antibiotic resistance genes for a continuous year in the urban river deciphered by metagenome assembly.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {362}, number = {}, pages = {125018}, doi = {10.1016/j.envpol.2024.125018}, pmid = {39322110}, issn = {1873-6424}, mesh = {*Rivers/microbiology/chemistry ; *Drug Resistance, Microbial/genetics ; *Microbiota/genetics ; Metagenome ; Bacteria/genetics ; Interspersed Repetitive Sequences ; Anti-Bacterial Agents/pharmacology ; Drug Resistance, Bacterial/genetics ; Environmental Monitoring/methods ; }, abstract = {Antibiotic resistance genes (ARGs) have become emerging environmental contaminants influenced by intricate regulatory factors. However, there is a lack of comprehensive studies on the evolution and distribution of ARGs over a full year in urban rivers, which serve as significant reservoirs of ARGs due to dynamic human activities. In this study, we conducted a 12-month metagenomic assembly to explore the microbial communities, ARGs, mobile genetic elements (MGEs) coexisting with ARGs, ARGs hosts, and the impact of environmental factors. Bacitracin (32%-47%) and multidrug (13%-24%) were detected throughout the year, constituting over 60% of the total abundance, making them the primary ARGs types. The assembly mechanisms of microbial communities and ARGs were primarily driven by stochastic processes. Integrase, IntI1, recombinase, and transposase were identified as the main MGEs coexisting with ARGs. Procrustes analysis revealed a significant structural association, indicating that the composition of host communities likely plays crucial roles in the seasonal composition and distribution of ARGs. Human pathogenic bacteria (HPBs) were identified in the summer, autumn, and winter, with Escherichia coli, Klebsiella pneumoniae, Acinetobacter lwoffii, and Burkholderiales bacterium being the primary HPBs. Mantle tests and PLS-PM equation analysis indicated that microbial communities and MGEs are the most critical factors determining the distribution and composition of ARGs in the river. Environmental factors (including water properties and nutrients) and ARGs hosts influence the evolution and abundance of ARGs by directly regulating microbial communities and MGEs. This study provides critical insights into risk assessment and management of ARGs in urban rivers.}, }
@article {pmid39320367, year = {2024}, author = {Kayser, E and He, F and Nixon, S and Howard-Varona, A and Lamelas, A and Martinez-Blanch, J and Chenoll, E and Davenport, GM and de Godoy, MRC}, title = {Effects of supplementation of live and heat-treated Bifidobacterium animalis subspecies lactis CECT 8145 on glycemic and insulinemic response, fecal microbiota, systemic biomarkers of inflammation, and white blood cell gene expression of adult dogs.}, journal = {Journal of animal science}, volume = {102}, number = {}, pages = {}, pmid = {39320367}, issn = {1525-3163}, mesh = {Animals ; Dogs ; *Bifidobacterium animalis ; *Feces/microbiology/chemistry ; *Probiotics/pharmacology/administration &amp; dosage ; Male ; Female ; *Diet/veterinary ; Dietary Supplements/analysis ; Animal Feed/analysis ; Biomarkers/blood ; Inflammation/veterinary ; Gastrointestinal Microbiome ; Blood Glucose ; Leukocytes/metabolism ; Hot Temperature ; Insulin/blood/metabolism ; Gene Expression ; }, abstract = {The popularity of functional ingredients such as probiotics and postbiotics has increased as pet owners seek ways to improve the health quality and longevity of their pets. Limited research has been conducted regarding the use of probiotics and postbiotics and their effects on canine health. The objective of this study was to evaluate the effects of daily supplementation of Bifidobacterium animalis subsp. lactis CECT 8145, in both live probiotic (PRO) and heat-treated postbiotic (POST) forms, on fecal fermentative end-products and microbiome, insulin sensitivity, serum gut hormones, oxidative stress, inflammatory biomarkers, and white blood cell gene expression of adult dogs. Eighteen adult beagles and 18 adult English pointers were used in a double-blinded placebo-controlled parallel group design, with 12 animals per group (6 English pointers and 6 beagles). The study began with a 60 d adaptation period followed by a 90 d period of daily supplementation with either PRO, POST, or placebo (maltodextrin; CON). Longitudinal assessment of body weight, body condition score, and pelvic circumference did not differ among dietary supplements (P > 0.05). Throughout the experimental period, fecal scores did not differ (P > 0.05); however, fecal pH was lower (P = 0.0049) in the dogs fed POST compared with CON. A higher fecal concentration of propionate (P = 0.043) was observed in dogs fed PRO and POST when compared with CON. While PRO and POST supplementation were associated with changes in bacterial composition at the family and genus level, the overall richness and diversity of the microbiome were not significantly affected. Functional analysis of the metagenome also suggests that PRO and POST supplementation induced potentially beneficial changes in the abundance of pathways involved in pathogenicity, amino acid biosynthesis, and DNA repair. No differences in glycemic or insulinemic responses were observed among the groups (P > 0.05). Dogs supplemented with PRO had a higher (P < 0.05) mean white blood cell leptin relative fold gene expression compared with groups POST and CON. Serum metabolites and complete blood cell counts were within normal ranges and all dogs remained healthy throughout the study. Together, these data suggest that the PRO and POST can safely be supplemented for dogs. Moreover, the results of this study support further investigation of the role of PRO and POST in supporting parameters related to gut health and hormonal regulation.}, }
@article {pmid39320101, year = {2024}, author = {Xue, H and Wang, Y and Mei, C and Han, L and Lu, M and Li, X and Chen, T and Wang, F and Tang, X}, title = {Gut microbiome and serum metabolome alterations associated with lactose intolerance (LI): a case‒control study and paired-sample study based on the American Gut Project (AGP).}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0083924}, pmid = {39320101}, issn = {2379-5077}, mesh = {*Gastrointestinal Microbiome/physiology ; Animals ; Male ; Case-Control Studies ; *Metabolome ; Humans ; *Lactose Intolerance/microbiology ; Rats ; Female ; Adult ; Fecal Microbiota Transplantation ; Rats, Sprague-Dawley ; Middle Aged ; }, abstract = {UNLABELLED: Lactose intolerance (LI) is a prevalent condition characterized by gastrointestinal symptoms that arise following lactose consumption. Recent evidence suggests that the gut microbiome may influence lactose levels in the gut. However, there is limited understanding regarding the alterations in microbiota and metabolism between individuals with LI and non-LI. This study conducted a paired-sample investigation utilizing data from the American Gut Project (AGP) and performed metagenomic and untargeted metabolomic analyses in a Chinese cohort to explore the interaction between the gut microbiome and serum metabolites. In addition, fecal microbiota transplantation (FMT) experiments were conducted to further examine the impact of the LI-associated gut microbiome on inflammatory outcomes. We identified 14 microbial genera that significantly differed between LI and controls from AGP data. Using a machine learning approach, group separation was predicted based on seven species and nine metabolites in the Chinese cohort. Notably, increased levels of Escherichia coli in the LI group were negatively correlated with several metabolites, including PC (22:6/0:0), indole, and Lyso PC, while reduced levels of Faecalibacterium prausnitzii and Eubacterium rectale were positively correlated with indole and furazolidone. FMT-LI rats displayed visceral hypersensitivity and an altered gut microbiota composition compared to FMT-HC rats. Metagenomic and metabolomic analyses revealed an enrichment of MAPK signaling in LI, which was confirmed by FMT-LI rats showing higher expression of ERK and RAS, along with increased concentrations of proinflammatory cytokines. This study provides valuable insights into the disrupted microbial and metabolic traits associated with LI, emphasizing potential microbiome-based approaches for its prevention and treatment.<br><br>IMPORTANCE: Lactose intolerance (LI) is a prevalent condition characterized by gastrointestinal symptoms after lactose consumption due to a deficiency of lactase. There is limited understanding regarding the microbiota and metabolic alterations between individuals with LI and non-LI. This study represents the first exploration to investigate metagenomic and metabolomic signatures among subjects with lactose intolerance as far as our knowledge. We identified 14 microbial genera in the Western cohort and 7 microbial species, along with 9 circulating metabolites in the Chinese cohort, which significantly differed in LI patients. Metagenomic and metabolomic analyses revealed an enrichment of MAPK signaling in LI patients. This finding was confirmed by FMT-LI rats, exhibiting increased expression of ERK and RAS, along with higher concentrations of pro-inflammatory cytokines. Our study provides insights into the disrupted functional and metabolic traits of the gut microbiome in LI, highlighting potential microbiome-based approaches for preventing and treating LI.}, }
@article {pmid39319624, year = {2025}, author = {Shi, Q and Fu, Q and Zhang, J and Hao, G and Liang, C and Duan, F and Ma, J and Zhao, H and Song, W}, title = {Paenibacillus polymyxa J2-4 induces cucumber to enrich rhizospheric Pseudomonas and contributes to Meloidogyne incognita management under field conditions.}, journal = {Pest management science}, volume = {81}, number = {1}, pages = {266-276}, doi = {10.1002/ps.8429}, pmid = {39319624}, issn = {1526-4998}, support = {2023YFD1400400//National Key R&amp;D Program of China/ ; 2022CXGC020710-6//Subproject of Shandong Province Key R&amp;D Plan Project/ ; QNYCX23027//Qingdao Agricultural University Graduate Student Innovation Program/ ; QNYCX24076//Qingdao Agricultural University Graduate Student Innovation Program/ ; }, mesh = {*Tylenchoidea/physiology ; Animals ; *Paenibacillus polymyxa/genetics/physiology ; *Pseudomonas/physiology ; *Rhizosphere ; *Cucumis sativus/microbiology/parasitology ; *Plant Diseases/prevention &amp; control/parasitology/microbiology ; Soil Microbiology ; Pest Control, Biological ; Microbiota ; }, abstract = {BACKGROUND: Root knot nematodes (RKNs) pose a great threat to agricultural production worldwide. The bacterial nematocides have received increasing attention due to their safe and efficient control against RKNs. Here, we investigated the biocontrol efficacy of Paenibacillus polymyxa J2-4 against Meloidogyne incognita in the field and analyzed the rhizosphere microbiome of cucumber under nematode infection after application of the J2-4 strain. Furthermore, a biomarker strain of Pseudomonas spp. was isolated from the J2-4-inoculated rhizosphere soil, and its nematocidal activity and growth-promoting effect on host plants were determined. In addition, chemotaxis assay of P. fluroescens ZJ5 toward root exudates was carried out.<br><br>RESULTS: The field experiment demonstrated that P. polymyxa J2-4 could effectively suppressed gall formation in cucumber plants, with the galling index reduced by 67.63% in 2022 and 65.50% in 2023, respectively, compared with controls. Meanwhile, plant height and yield were significantly increased in J2-4 treated plants compared with controls. Metagenomic analysis indicated that J2-4 altered the rhizosphere microbial communities. The relative abundance of Pseudomonas spp. was notably enhanced in the J2-4 group, which was consistent with Linear discriminant analysis Effect Size results that Pseudomonas was determined as one of the biomarkers in the J2-4 group. Furthermore, the ZJ5 strain, one of the biomarker Pseudomonas strains, was isolated from the J2-4-inoculated rhizosphere soil and was identified as Pseudomonas fluorescens. In addition, P. fluorescens ZJ5 exhibited high nematicidal activity in vitro and in vivo, with 99.20% of the mortality rate of M. incognita at 24&#x2009;h and 69.75% of gall index reduction. The biocontrol efficiency of the synthetic community of ZJ5 plus J2-4 was superior to that of any other single bacteria against M. incognita. Additionally, ZJ5 exhibited great chemotaxis ability toward root exudates inoculated with J2-4.<br><br>CONCLUSION: Paenibacillus polymyxa J2-4 has good potential in the biological control against M. incognita under field conditions. Enrichment of the beneficial bacteria Pseudomonas fluorescens ZJ5 in the J2-4-inoculated rhizosphere soil contributes to M. incognita management. &#xa9; 2024 Society of Chemical Industry.}, }
@article {pmid39316987, year = {2024}, author = {Yang, H and Liu, Y and Cao, G and Liu, J and Xiao, S and Xiao, P and Tao, Y and Gao, H}, title = {Effects of lycopene on the growth performance, meat quality, cecal metagenome, and hepatic untargeted metabolome in heat stressed broilers.}, journal = {Poultry science}, volume = {103}, number = {12}, pages = {104299}, pmid = {39316987}, issn = {1525-3171}, mesh = {Animals ; *Chickens/physiology/growth &amp; development ; *Animal Feed/analysis ; *Diet/veterinary ; *Meat/analysis ; *Liver/drug effects/metabolism ; *Lycopene/pharmacology/administration &amp; dosage ; *Cecum/microbiology/drug effects/metabolism ; *Dietary Supplements/analysis ; *Metabolome/drug effects ; Male ; Metagenome ; Random Allocation ; Gastrointestinal Microbiome/drug effects ; Heat-Shock Response/drug effects ; }, abstract = {The occurrence of heat stress in poultry houses is inevitable and leads to oxidative stress in the birds. Lycopene, a natural hydrocarbon carotenoid, possesses potent antioxidant properties. This study aimed to investigate the impact of lycopene on growth performance, meat quality, cecal microflora, and liver metabolome in broilers subjected to heat stress. A total of 480 yellow feather broilers were randomly allocated into 4 treatment groups: birds fed standard diet (Con), birds fed standard diet and supplemented with lycopene (Lyc), birds fed standard diet and subjected to heat stress (Hs), and birds fed with lycopene and subjected to heat stress (Hs-Lyc). As compared with the normal temperature groups, Hs decreased the average daily gain (ADG) of birds during d 1 to 28, lowered the pH value either in breast meat or thigh meat, increased the L* value of breast meat, and decreased the a* value of thigh meat. In comparison with non-Lyc feeding birds, Lyc supplement elevated the ADG during d 1 to 56, increased the pH of breast meat, decrease the L* and b* values of thigh meat, simultaneously increase the a* value of thigh meat. The L* of breast meat and pH of thigh meat exhibited significant differences under Hs-Lyc treatment. Lyc-treated birds exhibited higher elasticity, gumminess, and resilience in breast meat than those in non-Lyc feeding birds. The cecal metagenome analysis indicated that Hs-Lyc treatment increased the abundance of Phocaeicola salanitronis and Prevotella sp.CAG:1058, Bacteroides sp.An269, and Bacteroides sp.An19 at the species level compared with other treatments. The hepatic untargeted metabolome analysis showed that administration of Lyc upregulated 20 metabolites and downregulated 60 metabolites compared to the Con birds. Futhermore, the Hs-Lyc treatment upregulated 34 metabolites and downregulated 45 metabolites compared to the Hs birds. The correlation between the metagenome and metabolome showed that Lyc supplementation induced significant alterations in the citrate cycle, metabolism of butanoate, glycolysis/gluconeogenesis, glyoxylate and dicarboxylate, alanine, aspartate, and glutamate compared with standard supplement. In contrast, Hs-Lyc treatment induced alterations in the citrate cycle, metabolism of pyruvate, glyoxylate, and dicarboxylate, glycolysis/gluconeogenesis, arginine, proline, alanine, aspartate, and glutamate compared with the standard supplement of heat-challenged broilers. In summary, dietary Lyc supplementation promoted the growth performance, changed the meat quality, modulated the cecal metagenome and hepatic metabolome in heat-stressed broilers.}, }
@article {pmid39315850, year = {2024}, author = {Yao, G and Zhang, X and Zhang, T and Jin, J and Qin, Z and Ren, X and Wang, X and Zhang, S and Yin, X and Tian, Z and Zhang, Y and Zhang, J and Wang, Z and Zhang, Q}, title = {The role of dysbiotic gut mycobiota in modulating risk for abdominal aortic aneurysm.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0177624}, pmid = {39315850}, issn = {2165-0497}, support = {2021YFA1301102//MOST | National Key Research and Development Program of China (NKPs)/ ; 82170495, 82070820, 82370481//MOST | National Natural Science Foundation of China (NSFC)/ ; ZR2023ZD58//SDMOST|Natural Science Foundation of Shandong Province&#xff08;SDNSF&#xff09;/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology ; Animals ; *Aortic Aneurysm, Abdominal/microbiology/pathology ; Mice ; Male ; *Feces/microbiology ; Female ; Aged ; Fungi/isolation &amp; purification/classification/genetics/physiology ; Saccharomyces cerevisiae/genetics ; Mycobiome ; Mice, Inbred C57BL ; Candida/isolation &amp; purification/genetics/physiology/pathogenicity ; Metagenomics ; }, abstract = {UNLABELLED: Abdominal aortic aneurysm (AAA) is a large-vessel disease with high mortality, characterized by complex pathogenic mechanisms. Current therapeutic approaches remain insufficient to halt its progression. Fungi are important members of the gut microbiota. However, their characteristic alterations and roles in AAA remain unclear. This study investigated the role of gut fungal communities in the development of AAA through metagenomic sequencing of fecal samples from 31 healthy individuals and 33 AAA patients. We observed significant dysbiosis in the gut mycobiomes of AAA patients compared to healthy individuals, characterized by an increase in pathogenic fungi like Candida species and a decrease in beneficial yeasts such as Saccharomyces cerevisiae. The changes in fungal populations correlated strongly with clinical indicators of AAA, highlighting their potential for diagnosing and predicting AAA progression. Furthermore, our animal experiments demonstrated that Saccharomyces cerevisiae significantly ameliorated pathological alterations in AAA mice, suggesting a protective role for specific yeast strains against AAA development. These findings underscore the significant impact of gut mycobiomes on AAA and suggest that modulating these fungal communities could offer a novel therapeutic approach. Our research advances the understanding of the influence of gut microbiome on vascular diseases and suggests potential non-surgical approaches for managing AAA. By elucidating the diagnostic and therapeutic potential of gut fungi in AAA, this study provided important clues for future clinical strategies and therapeutic developments in the field of vascular medicine.<br><br>IMPORTANCE: Our research highlights the crucial role of gut fungi in abdominal aortic aneurysm (AAA) development. By analyzing fecal samples from AAA patients and healthy controls, we discovered significant dysbiosis in gut fungal communities, characterized by an increase in harmful Candida species and a decrease in beneficial yeasts like Saccharomyces cerevisiae. This dysbiosis was correlated with the severity of AAA. Importantly, in animal experiments, supplementing with Saccharomyces cerevisiae significantly slowed AAA progression. These findings suggest that modulating gut fungi may offer a novel, non-surgical approach to the diagnosis and treatment of AAA, potentially reducing the need for invasive procedures.}, }
@article {pmid39315792, year = {2024}, author = {Gu Liu, C and Thompson, BE and Chang, JD and Min, L and Maresso, AW}, title = {Construction and characterization of DNA libraries from cultured phages and environmental viromes.}, journal = {Applied and environmental microbiology}, volume = {90}, number = {10}, pages = {e0117124}, pmid = {39315792}, issn = {1098-5336}, support = {VA I01-RX002595//U.S. Department of Veterans Affairs (VA)/ ; //The Mike Hogg Foundation/ ; I01 RX002595/RX/RRD VA/United States ; Roderick D. MacDonald Research Fund//Baylor St. Luke's Medical Center/ ; Levy-Longenbaugh fund//Baylor College of Medicine/ ; Seed Funds to TAIL&#x3a6;R//Baylor College of Medicine (BCM)/ ; }, mesh = {*Gene Library ; *Bacteriophages/genetics/isolation &amp; purification/classification ; *Metagenomics ; Virome/genetics ; Wastewater/virology/microbiology ; Seawater/virology/microbiology ; DNA, Viral/genetics ; High-Throughput Nucleotide Sequencing ; Genome, Viral ; Fresh Water/virology/microbiology ; Escherichia coli/genetics/virology ; }, abstract = {Despite many efforts to understand and leverage the functional potential of environmental viromes, most bacteriophage genes are largely uncharacterized. To explore novel biology from uncultivated microbes like phages, metagenomics has emerged as a powerful tool to directly mine new genes without the need to culture the diverse microbiota and the viruses within. When a pure computational approach cannot infer gene function, it may be necessary to create a DNA library from environmental genomic DNA, followed by the screening of that library for a particular function. However, these screens are often initiated without a metagenomic analysis of the completed DNA library being reported. Here, we describe the construction and characterization of DNA libraries from a single cultured phage (ΦT4), five cultured Escherichia coli phages, and three metagenomic viral sets built from freshwater, seawater, and wastewater samples. Through next-generation sequencing of five independent samplings of the libraries, we found a consistent number of recovered genes per replicate for each library, with many genes classifiable via the KEGG and Pharokka databases. By characterizing the size of the genes and inserts, we found that our libraries contain a median of one to two genes per contig with a median gene length of 303-381 bp for all libraries, reflective of the small genomes of viruses. The environmental libraries were genetically diverse compared to the single phage and multi-phage libraries. Additionally, we found reduced coverage of individual genomes when five phages were used as opposed to one. Taken together, this work provides a comprehensive analysis of the DNA libraries from phage genomes that can be used for metagenomic exploration and functional screens to infer and identify new biology.IMPORTANCEFunctional metagenomics is an approach that aims to characterize the putative biological function of genes in the microbial world. This includes an examination of the sequencing data collected from a pooled source of diverse microbes and inference of gene function by comparison to annotated and studied genes from public databases. At times, DNA libraries are made from these genes, and the library is screened for a specific function. Hits are validated using a combination of biological, computational, and structural analysis. Left unresolved is a detailed characterization of the library, both its diversity and content, for the purposes of imputing function entirely by computational means, a process that may yield findings that aid in designing useful screens to identify novel gene functions. In this study, we constructed libraries from cultured phages and uncultured viromes from the environment and characterized some important parameters, such as gene number, genes per contig, ratio of hypothetical to known proteins, total genomic coverage and recovery, and the effect of pooling genetic information from multiple sources, to provide a better understanding of the nature of these libraries. This work will aid the design and implementation of future screens of pooled DNA libraries to discover and isolate viral genes with novel biology across various biomes.}, }
@article {pmid39315779, year = {2024}, author = {Rajeev, M and Jung, I and Kang, I and Cho, J-C}, title = {Genome-centric metagenomics provides insights into the core microbial community and functional profiles of biofloc aquaculture.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0078224}, pmid = {39315779}, issn = {2379-5077}, support = {KIMST-20210646//Korea Institute of Marine Science and Technology promotion (KIMST)/ ; NRF-2022R1A2C3008502,NRF-2018R1A5A1025077//National Research Foundation of Korea (NRF)/ ; }, mesh = {*Aquaculture ; *Metagenomics/methods ; Animals ; *Microbiota/genetics ; Bacteria/genetics/metabolism/classification ; Archaea/genetics/metabolism/classification ; Metagenome ; Phylogeny ; Penaeidae/microbiology/genetics ; }, abstract = {UNLABELLED: Bioflocs are microbial aggregates that play a pivotal role in shaping animal health, gut microbiota, and water quality in biofloc technology (BFT)-based aquaculture systems. Despite the worldwide application of BFT in aquaculture industries, our comprehension of the community composition and functional potential of the floc-associated microbiota (FAB community; ≥3 µm size fractions) remains rudimentary. Here, we utilized genome-centric metagenomic approach to investigate the FAB community in shrimp aquaculture systems, resulting in the reconstruction of 520 metagenome-assembled genomes (MAGs) spanning both bacterial and archaeal domains. Taxonomic analysis identified Pseudomonadota and Bacteroidota as core community members, with approximately 93% of recovered MAGs unclassified at the species level, indicating a large uncharacterized phylogenetic diversity hidden in the FAB community. Functional annotation of these MAGs unveiled their complex carbohydrate-degrading potential and involvement in carbon, nitrogen, and sulfur metabolisms. Specifically, genomic evidence supported ammonium assimilation, autotrophic nitrification, denitrification, dissimilatory nitrate reduction to ammonia, thiosulfate oxidation, and sulfide oxidation pathways, suggesting the FAB community's versatility for both aerobic and anaerobic metabolisms. Conversely, genes associated with heterotrophic nitrification, anaerobic ammonium oxidation, assimilatory nitrate reduction, and sulfate reduction were undetected. Members of Rhodobacteraceae emerged as the most abundant and metabolically versatile taxa in this intriguing community. Our MAGs compendium is expected to expand the available genome collection from such underexplored aquaculture environments. By elucidating the microbial community structure and metabolic capabilities, this study provides valuable insights into the key biogeochemical processes occurring in biofloc aquacultures and the major microbial contributors driving these processes.<br><br>IMPORTANCE: Biofloc technology has emerged as a sustainable aquaculture approach, utilizing microbial aggregates (bioflocs) to improve water quality and animal health. However, the specific microbial taxa within this intriguing community responsible for these benefits are largely unknown. Compounding this challenge, many bacterial taxa resist laboratory cultivation, hindering taxonomic and genomic analyses. To address these gaps, we employed metagenomic binning approach to recover over 500 microbial genomes from floc-associated microbiota of biofloc aquaculture systems operating in South Korea and China. Through taxonomic and genomic analyses, we deciphered the functional gene content of diverse microbial taxa, shedding light on their potential roles in key biogeochemical processes like nitrogen and sulfur metabolisms. Notably, our findings underscore the taxa-specific contributions of microbes in aquaculture environments, particularly in complex carbon degradation and the removal of toxic substances like ammonia, nitrate, and sulfide.}, }
@article {pmid39313592, year = {2024}, author = {Hemapriya, M and Nataraja, KN and Suryanarayanan, TS and Uma Shaanker, R}, title = {Comparative Metagenomic Analysis of Seed Endobiome of Domesticated and Wild Finger Millet Species (Eleusine spp.): Unveiling Microbial Diversity and Composition.}, journal = {Current microbiology}, volume = {81}, number = {11}, pages = {373}, pmid = {39313592}, issn = {1432-0991}, mesh = {*Seeds/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Metagenomics ; *Eleusine/microbiology/genetics ; *Domestication ; *Microbiota ; Biodiversity ; Fungi/classification/genetics/isolation &amp; purification ; }, abstract = {Domestication, which involves selective breeding, modern agricultural practices, and specific growing conditions, can influence the microbial and endophytic communities in crop plants. In this study, we examined the microbial diversity and community composition in the seeds of wild and domesticated finger millet species. We employed a metagenomic approach to investigate the seed microbial diversity and community composition of wild (Eleusine africana) and domesticated finger millet species (Eleusine coracana (L.) Gaertn) grown in the same habitat. While our findings indicated no significant change in seed endobiome diversity due to domestication, there were differences in microbial community composition between wild and domesticated species. Seeds of domesticated species had higher relative abundance of certain bacterial genera including Helicobacter, Akkermansia, Streptococcus, Bacteroides, and Pseudomonas, whereas seeds of wild species had higher relative abundance of unclassified Streptophyta. The seed-associated microbiota also varied among domesticated finger millet accessions. Co-occurrence network analysis revealed a strong relationship between bacteria and fungi in domesticated compared to wild species. We discuss the results obtained in the larger context of the importance of seed endobiome and how domestication processes in crop plants may have impacted the seed endobiome diversity, composition, and function compared to their wild counterparts.}, }
@article {pmid39313228, year = {2024}, author = {Kirtipal, N and Seo, Y and Son, J and Lee, S}, title = {Systems Biology of Human Microbiome for the Prediction of Personal Glycaemic Response.}, journal = {Diabetes &amp; metabolism journal}, volume = {48}, number = {5}, pages = {821-836}, pmid = {39313228}, issn = {2233-6087}, support = {//Ministry of Science ICT/ ; 2021R1C1C1006336//National Research Foundation of Korea/ ; 2021M3A9G8022959//National Research Foundation of Korea/ ; RS-2024-00419699//National Research Foundation of Korea/ ; //Korea Health Industry Development Institute/ ; HR22C141105//Ministry of Health and Welfare/ ; 2024-ER2108-00//Korea National Institute of Health/ ; 2024-ER0608-00//Korea National Institute of Health/ ; //GIST Research Institute/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Precision Medicine/methods ; *Systems Biology/methods ; Machine Learning ; Dysbiosis ; Blood Glucose/analysis ; Diabetes Mellitus/microbiology ; Diabetes Mellitus, Type 2/microbiology ; Hypoglycemic Agents/therapeutic use ; }, abstract = {The human gut microbiota is increasingly recognized as a pivotal factor in diabetes management, playing a significant role in the body's response to treatment. However, it is important to understand that long-term usage of medicines like metformin and other diabetic treatments can result in problems, gastrointestinal discomfort, and dysbiosis of the gut flora. Advanced sequencing technologies have improved our understanding of the gut microbiome's role in diabetes, uncovering complex interactions between microbial composition and metabolic health. We explore how the gut microbiota affects glucose metabolism and insulin sensitivity by examining a variety of -omics data, including genomics, transcriptomics, epigenomics, proteomics, metabolomics, and metagenomics. Machine learning algorithms and genome-scale modeling are now being applied to find microbiological biomarkers associated with diabetes risk, predicted disease progression, and guide customized therapy. This study holds promise for specialized diabetic therapy. Despite significant advances, some concerns remain unanswered, including understanding the complex relationship between diabetes etiology and gut microbiota, as well as developing user-friendly technological innovations. This mini-review explores the relationship between multiomics, precision medicine, and machine learning to improve our understanding of the gut microbiome's function in diabetes. In the era of precision medicine, the ultimate goal is to improve patient outcomes through personalized treatments.}, }
@article {pmid39311770, year = {2024}, author = {Zhou, B and Wang, C and Putzel, G and Hu, J and Liu, M and Wu, F and Chen, Y and Pironti, A and Li, H}, title = {An integrated strain-level analytic pipeline utilizing longitudinal metagenomic data.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0143124}, pmid = {39311770}, issn = {2165-0497}, support = {R01 CA159036/CA/NCI NIH HHS/United States ; R01CA204113//HHS | National Institutes of Health (NIH)/ ; P20 CA252728/CA/NCI NIH HHS/United States ; R01 LM014085/LM/NLM NIH HHS/United States ; P20CA252728,R01LM014085//HHS | National Institutes of Health (NIH)/ ; R01 CA204113/CA/NCI NIH HHS/United States ; R01 CA164964/CA/NCI NIH HHS/United States ; }, mesh = {*Metagenomics/methods ; Humans ; Longitudinal Studies ; Software ; Microbiota/genetics ; Polymorphism, Single Nucleotide ; High-Throughput Nucleotide Sequencing ; Metagenome ; Gastrointestinal Microbiome/genetics ; Bacteria/genetics/classification/isolation &amp; purification ; Computational Biology/methods ; Sequence Analysis, DNA/methods ; }, abstract = {UNLABELLED: With the development of sequencing technology and analytic tools, studying within-species variations enhances the understanding of microbial biological processes. Nevertheless, most existing methods designed for strain-level analysis lack the capability to concurrently assess both strain proportions and genome-wide single nucleotide variants (SNVs) across longitudinal metagenomic samples. In this study, we introduce LongStrain, an integrated pipeline for the analysis of large-scale metagenomic data from individuals with longitudinal or repeated samples. In LongStrain, we first utilize two efficient tools, Kraken2 and Bowtie2, for the taxonomic classification and alignment of sequencing reads, respectively. Subsequently, we propose to jointly model strain proportions and shared haplotypes across samples within individuals. This approach specifically targets tracking a primary strain and a secondary strain for each subject, providing their respective proportions and SNVs as output. With extensive simulation studies of a microbial community and single species, our results demonstrate that LongStrain is superior to two genotyping methods and two deconvolution methods across a majority of scenarios. Furthermore, we illustrate the potential applications of LongStrain in the real data analysis of The Environmental Determinants of Diabetes in the Young study and a gastric intestinal metaplasia microbiome study. In summary, the proposed analytic pipeline demonstrates marked statistical efficiency over the same type of methods and has great potential in understanding the genomic variants and dynamic changes at strain level. LongStrain and its tutorial are freely available online at https://github.com/BoyanZhou/LongStrain.<br><br>IMPORTANCE: The advancement in DNA-sequencing technology has enabled the high-resolution identification of microorganisms in microbial communities. Since different microbial strains within species may contain extreme phenotypic variability (e.g., nutrition metabolism, antibiotic resistance, and pathogen virulence), investigating within-species variations holds great scientific promise in understanding the underlying mechanism of microbial biological processes. To fully utilize the shared genomic variants across longitudinal metagenomics samples collected in microbiome studies, we develop an integrated analytic pipeline (LongStrain) for longitudinal metagenomics data. It concurrently leverages the information on proportions of mapped reads for individual strains and genome-wide SNVs to enhance the efficiency and accuracy of strain identification. Our method helps to understand strains' dynamic changes and their association with genome-wide variants. Given the fast-growing longitudinal studies of microbial communities, LongStrain which streamlines analyses of large-scale raw sequencing data should be of great value in microbiome research communities.}, }
@article {pmid39308020, year = {2024}, author = {Kong, X and Dong, Z and Hu, W and Mi, J and Xiao, J and Wang, Y and Chen, W and Pei, Z and Hao, Z and Liang, C and Wang, Q and Wang, Z}, title = {The role of gut microbiota involved in prostate microenvironment and symptoms improvement in chronic prostatitis/chronic pelvic pain syndrome patients treated with low-intensity extracorporeal shock wave.}, journal = {The Prostate}, volume = {84}, number = {16}, pages = {1525-1536}, doi = {10.1002/pros.24794}, pmid = {39308020}, issn = {1097-0045}, support = {2020QN-15//"Cuiying Science and Technology Innovation" Program/ ; CYXZ2022-40, CYXZ2022-23//Of the Second Hospital of Lanzhou University, The "Cuiying Scholars" Program of the Second Hospital of Lanzhou University/ ; 2021B-042//The Innovation Fund Project of the Gansu Provincial Education Department/ ; PRO133011//National Natural Science Foundation of China/ ; lzujbky-2021-kb29//The Fundamental Research Funds for the Central Universities of Lanzhou University/ ; //and Natural Science Foundation of G/ ; }, mesh = {Humans ; Male ; *Prostatitis/microbiology/therapy ; *Gastrointestinal Microbiome/physiology ; Middle Aged ; Adult ; *Extracorporeal Shockwave Therapy/methods ; *Pelvic Pain/therapy/microbiology ; *Prostate/microbiology ; Treatment Outcome ; Chronic Pain/therapy/microbiology ; Semen/microbiology ; }, abstract = {BACKGROUND: Low-intensity extracorporeal shockwave therapy (Li-ESWT) is emerging as a promising and safe treatment for Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). In this study, we aimed to investigate the role of the gut microbiota involved in the prostate microenvironment and symptom improvement during the Li-ESWT for CP/CPPS patients.<br><br>METHODS: CP/CPPS patients not taking antibiotics or other treatments were included. NIH-Chronic Prostatitis Symptom Index (NIH-CPSI), International Prostate Symptom Score (IPSS), and International Index of Erectile Function (IIEF-5) were used to evaluate the effectiveness of Li-ESWT at the end of treatment. Visual analogue scale/score was used to evaluate the pain during procedure. Stool and semen samples were collected before and after Li-ESWT. Shotgun metagenomics analyzed gut microbiota, while ELISA and other diagnostic kits detected biochemical changes in seminal plasma.<br><br>RESULT: Of the 60 enrolled patients, 52 completed treatment. Li-ESWT response rate was 78.8% (41/52) at end of treatment. Among responders, the subitems of the NIH-CPSI; IPSS; and IIEF-5 scores improved significantly, and the seminal plasma analysis showed decreased TNF-a and MDA levels and increased SOD and Zn[2+] levels posttreatment. Gut microbiome analysis indicated that posttreatment, both &#x3b1; and &#x3b2; diversity increased, and the abundance of certain specific species significantly increased. Fifty-eight pathways significantly enriched posttreatment, notably in branched-chain amino acid synthesis and butyrate synthesis. The abundance of several specific species was found to be significantly higher in non-responders than responders. Among responders, at the species level, some bacteria associated with NIH-CPSI and its subscales, IPSS, IIEF-5, and prostate microenvironment markers (TNF-a, MDA, Zn[2+], and SOD) were identified.<br><br>CONCLUSIONS: Our study demonstrates for the first time that Li-ESWT improves the prostate microenvironment and gut microbiota in CP/CPPS patients. Treatment nonresponse may be associated with a high abundance of specific pathogens before treatment. The gut microbiota could have a significant impact on Li-ESWT response and the prostate microenvironment.}, }
@article {pmid39307865, year = {2024}, author = {Gundogdu, A and Nalbantoglu, OU and Karis, G and Sarikaya, I and Erdogan, MN and Hora, M and Aslan, H}, title = {Comparing microbial communities in mucilage and seawater samples: Metagenomic insights into mucilage formation in the Marmara Sea.}, journal = {Environmental science and pollution research international}, volume = {31}, number = {48}, pages = {58363-58374}, pmid = {39307865}, issn = {1614-7499}, support = {121G128//The Scientific and Technological Research Council of Turkey (TUBITAK)/ ; }, mesh = {*Seawater/microbiology ; *Microbiota ; Metagenomics ; Bacteria/genetics ; }, abstract = {Marine environments are subject to various naturally occurring phenomena, including marine snow and mucilage. In 2021, the rapid emergence of mucilage in the Marmara Sea raised concerns about its environmental impact. This study investigates the microbial communities in mucilage and seawater samples from the Marmara Sea using metagenomic-scale comparative analyses. The results indicate significant differences in microbial composition and diversity, with mucilage samples showing higher levels of polysaccharide biosynthesis-related enzymes. Over 50% of reads in mucilage samples remained unclassified (dark matter), highlighting unknown microbial taxa. Clean seawater was characterized by a higher presence of Euryarchaeota, Proteobacteria, and Rhodothermaeota, while Chlamydiae and Fusobacteria were dominant in mucilage. The study underscores the necessity for comprehensive metagenomic analyses to understand microbial roles in mucilage formation and persistence. Early detection of microbial shifts could serve as a warning system for mucilage outbreaks, aiding in the development of management strategies.}, }
@article {pmid39307589, year = {2025}, author = {Koike, Y and Kuwatsuka, S and Motooka, D and Murota, H}, title = {Dysbiosis of the human skin mycobiome in patients receiving systemic IL-23 inhibitors.}, journal = {Allergology international : official journal of the Japanese Society of Allergology}, volume = {74}, number = {1}, pages = {72-77}, doi = {10.1016/j.alit.2024.06.003}, pmid = {39307589}, issn = {1440-1592}, mesh = {Humans ; *Mycobiome ; *Skin/microbiology ; *Dysbiosis/microbiology ; Female ; Male ; Middle Aged ; Adult ; Interleukin-23/antagonists &amp; inhibitors/immunology ; Psoriasis/drug therapy/microbiology ; Aged ; }, abstract = {BACKGROUND: Systemic inhibition of pro-inflammatory cytokines affects the skin microbiome; however, the impact of systemic anti-inflammatory therapy on the skin fungal microbiome is poorly understood. To examine the effects of cytokine inhibition on the fungal community on human skin and oral mucosa, we analyzed the composition of the skin mycobiome before and after IL-23 inhibition.<br><br>METHODS: The study enrolled 15 psoriasis patients. Swab samples were collected from the psoriasis-free skin of antecubital fossa, post-auricular, and the tongue surface before and after 16 weeks of treatment with anti-IL-23 antibodies. Fungal DNA was sequenced by ITS1 metagenomic analysis, and taxonomic classification was performed.<br><br>RESULTS: Data from samples collected from the antecubital fossa revealed that the &#x3b1; diversity of the skin mycobiome decreased significantly after treatment with anti-IL-23 antibodies (p&#xa0;=&#xa0;0.0120). Fungal DNAs were not amplified in 6/15 swab samples after 16 weeks of IL-23 inhibition; by contrast, sufficiently detected in all 15 samples before treatment (p&#xa0;=&#xa0;0.0554). A comparison of 9/15 paired samples containing well-detected reads revealed that the percentage of genus Malassezia in the mycobiome fell significantly after treatment with IL-23 inhibitors (before, 29.3%&#xa0;&#xb1;&#xa0;9.9%; after; 8.5%&#xa0;&#xb1;&#xa0;3.4%, p&#xa0;=&#xa0;0.0137). The mycobiome on post-auricular skin and on the tongue surface showed no marked changes after IL-23 inhibition.<br><br>CONCLUSIONS: Taken together, the data suggest that inhibition of systemic IL-23 provokes dysbiosis of the mycobiome at the antecubital fossa skin, a finding characterized by reduced fungal diversity and a reduction in the percentage of the genus Malassezia.}, }
@article {pmid39306146, year = {2024}, author = {Martínez-Aranzales, JR and Córdoba-Agudelo, M and Pérez-Jaramillo, JE}, title = {Fecal microbiome and functional prediction profiles of horses with and without crib-biting behavior: A comparative study.}, journal = {Journal of equine veterinary science}, volume = {142}, number = {}, pages = {105198}, doi = {10.1016/j.jevs.2024.105198}, pmid = {39306146}, issn = {0737-0806}, mesh = {Animals ; Horses/microbiology ; *Feces/microbiology ; Male ; Female ; Bacteria/genetics/classification/isolation &amp; purification ; Behavior, Animal/physiology ; Gastrointestinal Microbiome/physiology/genetics ; RNA, Bacterial/genetics/analysis ; }, abstract = {Crib-biting is a stereotyped oral behavior with poorly understood etiology and pathophysiology. The relationship between the gut microbiome and brain function has been described in behavioral disorders such as schizophrenia, depression and anxiety in humans. In horses, studies of behavioral problems and the microbiome are very limited. This study aimed to characterize the fecal microbiome and the predicted functional profile of horses with and without aerophagia. Fecal samples were collected from 12 Colombian Creole Horses of both sexes, divided into two groups: group 1, composed of six horses with crib-biting (3 females and 3 males), average body weight of 330 ± 10 kg, age of 7.0 ± 1.2 years and body condition score (BCS) of 5/9 ± 1 and group 2, consisting of six horses without crib-biting (3 females and 3 males), average body weight of 335 ± 5 kg, age 6.5 ± 1 years and BCS of 6/9 ± 1. From each horse in both groups fecal total DNA was obtained and 16S ribosomal RNA gene amplicons were sequenced to characterize the bacterial community structure. Community structure and differential abundance analyses revealed significant differences between the two conditions (p < 0.05). Specifically, the fecal microbiota at the family level in crib-biting horses, showing a decrease in Bacteroidales and an increase in Bacillota and Clostridia, differed from that of healthy horses without crib-biting, consistent with findings from previous studies. Furthermore, metagenome prediction suggests metabolic profile changes in bacterial communities between both conditions in horses. Further studies are required to validate the role of the microbiota-gut-brain axis in the etiology of crib-biting and other abnormal and stereotyped behaviors.}, }
@article {pmid39305900, year = {2025}, author = {Liu, Q and Huang, B and Zhou, Y and Wei, Y and Li, Y and Li, B and Li, Y and Zhang, J and Qian, Q and Chen, R and Lyu, Z and Wang, R and Cao, Q and Xu, Q and Wang, Q and Miao, Q and You, Z and Lian, M and Gershwin, ME and Jin, Q and Xiao, X and Ma, X and Tang, R}, title = {Gut microbiome pattern impacts treatment response in primary biliary cholangitis.}, journal = {Med (New York, N.Y.)}, volume = {6}, number = {1}, pages = {100504}, doi = {10.1016/j.medj.2024.08.003}, pmid = {39305900}, issn = {2666-6340}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Ursodeoxycholic Acid/therapeutic use ; Female ; *Liver Cirrhosis, Biliary/drug therapy/microbiology ; Male ; Middle Aged ; Prospective Studies ; Aged ; Dysbiosis/microbiology ; Feces/microbiology ; Metagenomics ; *Cholagogues and Choleretics/therapeutic use ; Metagenome ; Treatment Outcome ; }, abstract = {BACKGROUND: Primary biliary cholangitis (PBC) is a progressive autoimmune liver disease. An inadequate response to ursodeoxycholic acid (UDCA) poses a high risk of progression toward end-stage liver disease. Gut dysbiosis has been implicated in PBC. Here, we aimed to investigate microbial signatures that permit risk stratification and provide mechanistic insights into novel therapies for PBC.<br><br>METHODS: We prospectively recruited UDCA treatment-naive patients with PBC and performed metagenomic sequencing and metabolomic profiling using stool and serum samples obtained before (n&#xa0;= 132) and after (n&#xa0;= 59) treatment. PBC microbiome subtypes were identified using unsupervised machine learning methods and validated in two independent cohorts.<br><br>FINDINGS: PBC baseline metagenomes clustered into two community subtypes characterized by varying abundances of Clostridia taxa. Compared with Clostridia[low] microbiomes, Clostridia[high] microbiomes were more similar to healthy controls. Notably, patients in the Clostridia[low] subtype exhibited a 2-fold higher UDCA non-response rate compared to those in the Clostridia[high] subtype (41% vs. 20%, p&#xa0;= 0.015). Integrative analysis of metagenomic and metabolomic data revealed divergent functional modules and metabolic activities between the two metacommunities. In particular, anaerobic fermentation and the production of bioactive metabolites, including tryptophan derivatives and secondary bile acids, crucial for immune regulation and gut barrier maintenance, were markedly diminished in the Clostridia[low] subtype. Moreover, UDCA administration reconfigured the fecal microbial and metabolic profiles only in the Clostridia[high] group. Importantly, the microbiome subtypes and their associations with UDCA response were reproducible in two independent treatment-naive PBC cohorts.<br><br>CONCLUSIONS: Characterizing baseline microbiota patterns may enable the prediction of treatment outcomes in PBC and facilitate personalized treatment strategies.<br><br>FUNDING: This research was mainly supported by the National Natural Science Foundation of China.}, }
@article {pmid39305897, year = {2024}, author = {Zampirolo, G and Holman, LE and Sawafuji, R and Ptáková, M and Kovačiková, L and Šída, P and Pokorný, P and Pedersen, MW and Walls, M}, title = {Tracing early pastoralism in Central Europe using sedimentary ancient DNA.}, journal = {Current biology : CB}, volume = {34}, number = {20}, pages = {4650-4661.e4}, doi = {10.1016/j.cub.2024.08.047}, pmid = {39305897}, issn = {1879-0445}, mesh = {*DNA, Ancient/analysis ; Animals ; *Archaeology ; Forests ; Sheep/genetics ; Microbiota/genetics ; Agriculture/history ; Geologic Sediments/analysis ; Europe ; }, abstract = {Central European forests have been shaped by complex human interactions throughout the Holocene, with significant changes following the introduction of domesticated animals in the Neolithic (∼7.5-6.0 ka before present [BP]). However, understanding early pastoral practices and their impact on forests is limited by methods for detecting animal movement across past landscapes. Here, we examine ancient sedimentary DNA (sedaDNA) preserved at the Velký Mamuťák rock shelter in northern Bohemia (Czech Republic), which has been a forested enclave since the early Holocene. We find that domesticated animals, their associated microbiomes, and plants potentially gathered for fodder have clear representation by the Late Neolithic, around 6.0 ka BP, and persist throughout the Bronze Age into recent times. We identify a change in dominant grazing species from sheep to pigs in the Bronze Age (∼4.1-3.0 ka BP) and interpret the impact this had in the mid-Holocene retrogressions that still define the structure of Central European forests today. This study highlights the ability of ancient metagenomics to bridge archaeological and paleoecological methods and provide an enhanced perspective on the roots of the "Anthropocene."}, }
@article {pmid39305601, year = {2024}, author = {Wang, F and Hu, Z and Wang, W and Wang, J and Xiao, Y and Shi, J and Wang, C and Mai, W and Li, G and An, T}, title = {Selective enrichment of high-risk antibiotic resistance genes and priority pathogens in freshwater plastisphere: Unique role of biodegradable microplastics.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {135901}, doi = {10.1016/j.jhazmat.2024.135901}, pmid = {39305601}, issn = {1873-3336}, mesh = {*Microplastics/toxicity ; *Drug Resistance, Microbial/genetics ; *Fresh Water/microbiology ; Water Pollutants, Chemical/toxicity ; Biofilms/drug effects ; Bacteria/genetics/drug effects ; Genes, Bacterial ; Virulence Factors/genetics ; Polyhydroxyalkanoates ; Polyesters/metabolism ; Microbiota/drug effects/genetics ; Biodegradation, Environmental ; Biodegradable Plastics ; }, abstract = {Microplastics (MPs) has been concerned as emerging vectors for spreading antibiotic resistance and pathogenicity in aquatic environments, but the role of biodegradable MPs remains largely unknown. Herein, field in-situ incubation method combined with metagenomic sequencing were employed to reveal the dispersal characteristics of microbial community, antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and virulence factors (VFs) enriched by MPs biofilms. Results showed that planktonic microbes were more prone to enrich on biodegradable MPs (i.e., polyhydroxyalkanoate and polylactic acid) than non-biodegradable MPs (i.e., polystyrene, polypropylene and polyethylene). Distinctive microbial communities were assembled on biodegradable MPs, and the abundances of ARGs, MGEs, and VFs on biofilms of biodegradable MPs were much higher than that of non-biodegradable MPs. Notably, network analysis showed that the biodegradable MPs selectively enriched pathogens carrying ARGs, VFs and MGEs concurrently, suggesting a strong potential risks of co-spreading antibiotic resistance and pathogenicity through horizontal gene transfer. According to WHO priority list of Antibiotic Resistant Pathogens (ARPs) and ARGs health risk assessment framework, the highest abundances of Priority 1 ARPs and Rank I risk ARGs were found on polylactic acid and polyhydroxyalkanoate, respectively. These findings elucidate the unique and critical role of biodegradable MPs for selective enrichment of high-risk ARGs and priority pathogens in freshwater environments.}, }
@article {pmid39305563, year = {2024}, author = {Albuquerque, L and Viver, T and Barroso, C and Claudino, R and Galvan, M and Simões, G and Lobo-da-Cunha, A and Egas, C}, title = {Halorubrum miltondacostae sp. nov., a potential polyhydroxyalkanoate producer isolated from an inland solar saltern in Rio Maior, Portugal.}, journal = {Systematic and applied microbiology}, volume = {47}, number = {6}, pages = {126553}, doi = {10.1016/j.syapm.2024.126553}, pmid = {39305563}, issn = {1618-0984}, mesh = {*Phylogeny ; *RNA, Ribosomal, 16S/genetics ; *Sequence Analysis, DNA ; *Polyhydroxyalkanoates ; *Halorubrum/genetics/classification/isolation &amp; purification ; Portugal ; *DNA, Archaeal/genetics/chemistry ; Random Amplified Polymorphic DNA Technique ; Base Composition ; Fatty Acids/analysis/chemistry ; Genes, Essential/genetics ; Phospholipids/analysis/chemistry ; }, abstract = {One hundred and sixty-three extreme halophiles were recovered from a single sample collected from an inland solar saltern in Rio Maior. Based on random amplified polymorphic DNA (RAPD) profiles and partial 16S rRNA gene sequencing 125 isolates were identified as members of the Archaea domain within the genus Halorubrum. Two strains, RMP-11[T] and RMP-47, showed 99.1 % sequence similarity with the species Halorubrum californiense based on phylogenetic analysis of the 16S rRNA gene sequence. However, phylogenetic analysis based on five housekeeping genes, atpB, EF-2, glnA, ppsA and rpoB', showed Halorubrum coriense as the closest related species with 96.7 % similarity. The average nucleotide identity (ANI) of strains RMP-11[T], RMP-47 and species Hrr. coriense were within the range of 90.0-90.5 %, supporting that strains RMP-11[T] and RMP-47 represent a novel species of the genus Halorubrum. These strains formed red-pigmented colonies that were able to grow in a temperature range of 25-50 °C. Polyhydroxyalkanoate (PHA) granules were detected in both strains. The polar lipid profile was identical to the neutrophilic species of the genus Halorubrum. The Rio Maior sample from which both strains were isolated was metagenome sequenced. We identified five metagenome-assembled genomes representing novel Halorubrum species but distinct from the species represented by strains RMP-11[T] and RMP-47. Based on phylogenetic, phylogenomic, comparative genomics, physiological and chemotaxonomic parameters, we describe a new species of the genus Halorubrum represented by strains RMP-11[T] (=CECT 30760[T] = DSM 115521[T]) and RMP-47 (=CECT 30761 = DSM 115541) for which we propose the name Halorubrum miltondacostae sp. nov.}, }
@article {pmid39304820, year = {2024}, author = {Silva, MH and Batista, LL and Malta, SM and Santos, ACC and Mendes-Silva, AP and Bonetti, AM and Ueira-Vieira, C and Dos Santos, AR}, title = {Unveiling the Brazilian kefir microbiome: discovery of a novel Lactobacillus kefiranofaciens (LkefirU) genome and in silico prospection of bioactive peptides with potential anti-Alzheimer properties.}, journal = {BMC genomics}, volume = {25}, number = {1}, pages = {884}, pmid = {39304820}, issn = {1471-2164}, mesh = {*Kefir/microbiology ; *Alzheimer Disease ; *Lactobacillus/genetics ; *Genome, Bacterial ; *Microbiota ; Brazil ; *Peptides/chemistry/pharmacology ; Humans ; Molecular Docking Simulation ; Amyloid beta-Peptides/metabolism/genetics ; Amyloid Precursor Protein Secretases/metabolism ; Aspartic Acid Endopeptidases/genetics/metabolism ; Metagenomics/methods ; }, abstract = {BACKGROUND: Kefir is a complex microbial community that plays a critical role in the fermentation and production of bioactive peptides, and has health-improving properties. The composition of kefir can vary by geographic localization and weather, and this paper focuses on a Brazilian sample and continues previous work that has successful anti-Alzheimer properties. In this study, we employed shotgun metagenomics and peptidomics approaches to characterize Brazilian kefir further.<br><br>RESULTS: We successfully assembled the novel genome of Lactobacillus kefiranofaciens (LkefirU) and conducted a comprehensive pangenome analysis to compare it with other strains. Furthermore, we performed a peptidome analysis, revealing the presence of bioactive peptides encrypted by L. kefiranofaciens in the Brazilian kefir sample, and utilized in silico prospecting and molecular docking techniques to identify potential anti-Alzheimer peptides, targeting &#x3b2;-amyloid (fibril and plaque), BACE, and acetylcholinesterase. Through this analysis, we identified two peptides that show promise as compounds with anti-Alzheimer properties.<br><br>CONCLUSIONS: These findings not only provide insights into the genome of L. kefiranofaciens but also serve as a promising prototype for the development of novel anti-Alzheimer compounds derived from Brazilian kefir.}, }
@article {pmid39304351, year = {2025}, author = {Jiménez, DJ and Chaparro, D and Sierra, F and Custer, GF and Feuerriegel, G and Chuvochina, M and Diaz-Garcia, L and Mendes, LW and Ortega Santiago, YP and Rubiano-Labrador, C and Salcedo Galan, F and Streit, WR and Dini-Andreote, F and Reyes, A and Rosado, AS}, title = {Engineering the mangrove soil microbiome for selection of polyethylene terephthalate-transforming bacterial consortia.}, journal = {Trends in biotechnology}, volume = {43}, number = {1}, pages = {162-183}, doi = {10.1016/j.tibtech.2024.08.013}, pmid = {39304351}, issn = {1879-3096}, mesh = {*Polyethylene Terephthalates/metabolism ; *Soil Microbiology ; *Microbiota/genetics ; Microbial Consortia/genetics ; Biodegradation, Environmental ; Wetlands ; Bacteria/genetics/metabolism/classification ; Seawater/microbiology ; Metagenome/genetics ; }, abstract = {Mangroves are impacted by multiple environmental stressors, including sea level rise, erosion, and plastic pollution. Thus, mangrove soil may be an excellent source of as yet unknown plastic-transforming microorganisms. Here, we assess the impact of polyethylene terephthalate (PET) particles and seawater intrusion on the mangrove soil microbiome and report an enrichment culture experiment to artificially select PET-transforming microbial consortia. The analysis of metagenome-assembled genomes of two bacterial consortia revealed that PET catabolism can be performed by multiple taxa, of which particular species harbored putative novel PET-active hydrolases. A key member of these consortia (Mangrovimarina plasticivorans gen. nov., sp. nov.) was found to contain two genes encoding monohydroxyethyl terephthalate hydrolases. This study provides insights into the development of strategies for harnessing soil microbiomes, thereby advancing our understanding of the ecology and enzymology involved in microbial-mediated PET transformations in marine-associated systems.}, }
@article {pmid39303138, year = {2024}, author = {Boukheloua, R and Mukherjee, I and Park, H and Šimek, K and Kasalický, V and Ngochera, M and Grossart, HP and Picazo-Mozo, A and Camacho, A and Cabello-Yeves, PJ and Rodriguez-Valera, F and Callieri, C and Andrei, AS and Pernthaler, J and Posch, T and Alfreider, A and Sommaruga, R and Hahn, MW and Sonntag, B and López-García, P and Moreira, D and Jardillier, L and Lepère, C and Biderre-Petit, C and Bednarska, A and Ślusarczyk, M and Tóth, VR and Banciu, HL and Kormas, K and Orlić, S and Šantić, D and Muyzer, G and Herlemann, DPR and Tammert, H and Bertilsson, S and Langenheder, S and Zechmeister, T and Salmaso, N and Storelli, N and Capelli, C and Lepori, F and Lanta, V and Vieira, HH and Kostanjšek, F and Kabeláčová, K and Chiriac, MC and Haber, M and Shabarova, T and Fernandes, C and Rychtecký, P and Znachor, P and Szőke-Nagy, T and Layoun, P and Wong, HL and Kavagutti, VS and Bulzu, PA and Salcher, MM and Piwosz, K and Ghai, R}, title = {Global freshwater distribution of Telonemia protists.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39303138}, issn = {1751-7370}, support = {20-12496X//Grant Agency of the Czech Republic/ ; 017/2022/P//GAJU/ ; 2021/03/Y/NZ8/00076//National Science Centre/ ; }, mesh = {*Fresh Water/microbiology/parasitology ; *Phylogeny ; *RNA, Ribosomal, 18S/genetics ; *In Situ Hybridization, Fluorescence ; Metagenome ; Lakes/microbiology/parasitology ; Biodiversity ; Metagenomics ; }, abstract = {Telonemia are one of the oldest identified marine protists that for most part of their history have been recognized as a distinct incertae sedis lineage. Today, their evolutionary proximity to the SAR supergroup (Stramenopiles, Alveolates, and Rhizaria) is firmly established. However, their ecological distribution and importance as a natural predatory flagellate, especially in freshwater food webs, still remain unclear. To unravel the distribution and diversity of the phylum Telonemia in freshwater habitats, we examined over a thousand freshwater metagenomes from all over the world. In addition, to directly quantify absolute abundances, we analyzed 407 samples from 97 lakes and reservoirs using Catalyzed Reporter Deposition-Fluorescence in situ Hybridization (CARD-FISH). We recovered Telonemia 18S rRNA gene sequences from hundreds of metagenomic samples from a wide variety of habitats, indicating a global distribution of this phylum. However, even after this extensive sampling, our phylogenetic analysis did not reveal any new major clades, suggesting current molecular surveys are near to capturing the full diversity within this group. We observed excellent concordance between CARD-FISH analyses and estimates of abundances from metagenomes. Both approaches suggest that Telonemia are largely absent from shallow lakes and prefer to inhabit the colder hypolimnion of lakes and reservoirs in the Northern Hemisphere, where they frequently bloom, reaching 10%-20% of the total heterotrophic flagellate population, making them important predatory flagellates in the freshwater food web.}, }
@article {pmid39303118, year = {2024}, author = {Doré, J and Sansonetti, PJ}, title = {[The human microbiome: 340 years of history, 140 years of interrogations, technological innovations and emergence of "microbial medicine"].}, journal = {Medecine sciences : M/S}, volume = {40}, number = {8-9}, pages = {654-660}, doi = {10.1051/medsci/2024101}, pmid = {39303118}, issn = {1958-5381}, mesh = {Humans ; Gastrointestinal Microbiome/physiology ; History, 18th Century ; History, 19th Century ; History, 20th Century ; History, 21st Century ; Inventions/history/trends ; *Microbiota/physiology ; Symbiosis ; History, 17th Century ; }, abstract = {For 350 years, we have known that the human body hosts microbes, then called "animalcules". For over a century, following the demonstration of the role of some of these microbes in diseases, questions have arisen about the role of the largely predominant ones colonizing human skin and mucous surfaces, particularly the rich microbial ecosystem of the intestine, the gut microbiota. From the invention of germ-free life - axenism - which experimentally validated the human-microbe symbiosis, resulting from a long coevolution, to the development of anaerobic culture methods, then to the invention of molecular diagnosis, deep sequencing opening up metagenomic and omics approaches in general, a remarkable race has taken place between technological innovations and conceptual advances. This race, beyond the exhaustive description of the microbiota in its intra- and inter-human diversity, and the essential symbiotic functions of the microbiome, has paved the way for a new field of medicine: microbial medicine.}, }
@article {pmid39300577, year = {2024}, author = {Lezcano, M&#xc1; and Bornemann, TLV and Sánchez-García, L and Carrizo, D and Adam, PS and Esser, SP and Cabrol, NA and Probst, AJ and Parro, V}, title = {Hyperexpansion of genetic diversity and metabolic capacity of extremophilic bacteria and archaea in ancient Andean lake sediments.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {176}, pmid = {39300577}, issn = {2049-2618}, support = {FJC2018-037246-I//Spanish Ministry of Science and Innovation/State Agency of Research/ ; RYC2018-023943-I//Spanish Ministry of Science and Innovation/State Agency of Research/ ; RYC-2014-19446//Spanish Ministry of Science and Innovation/State Agency of Research/ ; RTI2018-094368-B-I0//Spanish Ministry of Science and Innovation/State Agency of Research/ ; PEJD-2017- POST/TIC-4119//Spanish Ministry of Science and Innovation/State Agency of Research (EU Youth Employment Initiative)/ ; NAI-CAN7, 13NAI7_2-0018//NASA Astrobiology Institute/ ; DFG PR1603/2-1//German Research Foundation/ ; 161L0285E//German Federal Ministry of Education and Research/ ; }, mesh = {*Lakes/microbiology ; *Archaea/genetics/metabolism/classification ; *Geologic Sediments/microbiology ; *Bacteria/classification/genetics/metabolism/isolation &amp; purification ; *Genetic Variation ; Chile ; Phylogeny ; Microbiota ; Extremophiles/metabolism/genetics/classification ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: The Andean Altiplano hosts a repertoire of high-altitude lakes with harsh conditions for life. These lakes are undergoing a process of desiccation caused by the current climate, leaving terraces exposed to extreme atmospheric conditions and serving as analogs to Martian paleolake basins. Microbiomes in Altiplano lake terraces have been poorly studied, enclosing uncultured lineages and a great opportunity to understand environmental adaptation and the limits of life on Earth. Here we examine the microbial diversity and function in ancient sediments (10.3-11 kyr BP (before present)) from a terrace profile of Laguna Lejía, a sulfur- and metal/metalloid-rich saline lake in the Chilean Altiplano. We also evaluate the physical and chemical changes of the lake over time by studying the mineralogy and geochemistry of the terrace profile.<br><br>RESULTS: The mineralogy and geochemistry of the terrace profile revealed large water level fluctuations in the lake, scarcity of organic carbon, and high concentration of SO4[2-]-S, Na, Cl and Mg. Lipid biomarker analysis indicated the presence of aquatic/terrestrial plant remnants preserved in the ancient sediments, and genome-resolved metagenomics unveiled a diverse prokaryotic community with still active microorganisms based on in silico growth predictions. We reconstructed 591 bacterial and archaeal metagenome-assembled genomes (MAGs), of which 98.8% belonged to previously unreported species. The most abundant and widespread metabolisms among MAGs were the reduction and oxidation of S, N, As, and halogenated compounds, as well as aerobic CO oxidation, possibly as a key metabolic trait in the organic carbon-depleted sediments. The broad redox and CO2 fixation pathways among phylogenetically distant bacteria and archaea extended the knowledge of metabolic capacities to previously unknown taxa. For instance, we identified genomic potential for dissimilatory sulfate reduction in Bacteroidota and &#x3b1;- and &#x3b3;-Proteobacteria, predicted an enzyme for ammonia oxidation in a novel Actinobacteriota, and predicted enzymes of the Calvin-Benson-Bassham cycle in Planctomycetota, Gemmatimonadota, and Nanoarchaeota.<br><br>CONCLUSIONS: The high number of novel bacterial and archaeal MAGs in the Laguna Lej&#xed;a indicates the wide prokaryotic diversity discovered. In addition, the detection of genes in unexpected taxonomic groups has significant implications for the expansion of microorganisms involved in the biogeochemical cycles of carbon, nitrogen, and sulfur. Video Abstract.}, }
@article {pmid39300575, year = {2024}, author = {Li, Q and Ruscheweyh, HJ and Østergaard, LH and Libertella, M and Simonsen, KS and Sunagawa, S and Scoma, A and Schwab, C}, title = {Trait-based study predicts glycerol/diol dehydratases as a key function of the gut microbiota of hindgut-fermenting carnivores.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {178}, pmid = {39300575}, issn = {2049-2618}, support = {9152//EMBO/ ; AUFF-F-2020-7//Aarhus Universitet Forsknings Fonden/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Feces/microbiology ; *Fermentation ; *Glycerol/metabolism ; *Metagenomics/methods ; Hydro-Lyases/genetics/metabolism ; Propylene Glycols/metabolism ; Vitamin B 12/metabolism ; Bacteria/classification/genetics/isolation &amp; purification/enzymology ; Phylogeny ; Animals, Wild/microbiology ; }, abstract = {BACKGROUND: Microbial pdu and cob-cbi-hem gene clusters encode the key enzyme glycerol/diol dehydratase (PduCDE), which mediates the transformation of dietary nutrients glycerol and 1,2-propanediol (1,2-PD) to a variety of metabolites, and enzymes for cobalamin synthesis, a co-factor and shared good of microbial communities. It was the aim of this study to relate pdu as a multipurpose functional trait to environmental conditions and microbial community composition. We collected fecal samples from wild animal species living in captivity with different gut physiology and diet (n = 55, in total 104 samples), determined occurrence and diversity of pdu and cob-cbi-hem using a novel approach combining metagenomics with quantification of metabolic and genetic biomarkers, and conducted in vitro fermentations to test for trait-based activity.<br><br>RESULTS: Fecal levels of the glycerol transformation product 1,3-propanediol (1,3-PD) were higher in hindgut than foregut fermenters. Gene-based analyses indicated that pduC harboring taxa are common feature of captive wild animal fecal microbiota that occur more frequently and at higher abundance in hindgut fermenters. Phylogenetic analysis of genomes reconstructed from metagenomic sequences identified captive wild animal fecal microbiota as taxonomically rich with a total of 4150 species and&#x2009;>&#x2009;1800 novel species but pointed at only 56 species that at least partially harbored pdu and cbi-cob-hem. While taxonomic diversity was highest in fecal samples of foregut-fermenting herbivores, higher pduC abundance and higher diversity of pdu/cbi-cob-hem related to higher potential for glycerol and 1,2-PD utilization of the less diverse microbiota of hindgut-fermenting carnivores in vitro.<br><br>CONCLUSION: Our approach combining metabolite and gene biomarker analysis with metagenomics and phenotypic characterization identified Pdu as a common function of fecal microbiota of captive wild animals shared by few taxa and stratified the potential of fecal microbiota for glycerol/1,2-PD utilization and cobalamin synthesis depending on diet and physiology of the host. This trait-based study suggests that the ability to utilize glycerol/1,2-PD is a key function of hindgut-fermenting carnivores, which does not relate to overall community diversity but links to the potential for cobalamin formation. Video Abstract.}, }
@article {pmid39300163, year = {2024}, author = {Myeong, NR and Choe, YH and Shin, SC and Kim, J and Sul, WJ and Kim, M}, title = {Genomic profiling of Antarctic geothermal microbiomes using long-read, Hi-C, and single-cell techniques.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {1023}, pmid = {39300163}, issn = {2052-4463}, support = {PE24460//Korea Polar Research Institute (KOPRI)/ ; PE24070//Korea Polar Research Institute (KOPRI)/ ; PE24460//Korea Polar Research Institute (KOPRI)/ ; PE24460//Korea Polar Research Institute (KOPRI)/ ; Graduate Research Scholarship in 2017//Chung-Ang University (CAU)/ ; }, mesh = {Antarctic Regions ; *Microbiota ; *Single-Cell Analysis ; Hot Springs/microbiology ; Metagenomics ; Metagenome ; }, abstract = {Geothermal features in Antarctica provide favorable conditions for diverse microorganisms, yet their genomic diversity remains poorly understood. Here, we present an integrated dataset comprising PacBio HiFi and Hi-C metagenomic sequencing, along with single-cell amplified genomes (SAGs) from two high-altitude geothermal sites, Mount Melbourne and Mount Rittmann, in Antarctica. The long-read HiFi sequencing, coupled with Hi-C, enhances the understanding of microbiome diversity and functionality in this unique ecosystem by providing more complete and accurate genomic information. SAGs complement this by recovering rare microbial taxa and offering a strain-resolved perspective. This dataset aims to deepen our understanding of microbial evolution and ecology in Antarctic geothermal environments, and facilitate cross-comparison with other geothermal environments globally.}, }
@article {pmid39299446, year = {2024}, author = {Wei, ZY and Feng, M and Zhang, DX and Jiang, CY and Deng, Y and Wang, ZJ and Feng, K and Song, Y and Zhou, N and Wang, YL and Liu, SJ}, title = {Deep insights into the assembly mechanisms, co-occurrence patterns, and functional roles of microbial community in wastewater treatment plants.}, journal = {Environmental research}, volume = {263}, number = {Pt 1}, pages = {120029}, doi = {10.1016/j.envres.2024.120029}, pmid = {39299446}, issn = {1096-0953}, mesh = {*Microbiota ; *Wastewater/microbiology ; Waste Disposal, Fluid/methods ; Seasons ; RNA, Ribosomal, 16S/genetics ; Sewage/microbiology ; Bacteria/genetics/classification ; Phosphorus/analysis ; }, abstract = {The understanding of activated sludge microbial status and roles is imperative for improving and enhancing the performance of wastewater treatment plants (WWTPs). In this study, we conducted a deep analysis of activated sludge microbial communities across five compartments (inflow, effluent, and aerobic, anoxic, anaerobic tanks) over temporal scales, employing high-throughput sequencing of 16S rRNA amplicons and metagenome data. Clearly discernible seasonal patterns, exhibiting cyclic variations, were observed in microbial diversity, assembly, co-occurrence network, and metabolic functions. Notably, summer samples exhibited higher α-diversity and were distinctly separated from winter samples. Our analysis revealed that microbial community assembly is influenced by both stochastic processes (66%) and deterministic processes (34%), with winter samples demonstrating more random assembly compared to summer. Co-occurrence patterns were predominantly mutualistic, with over 96% positive correlations, and summer networks were more organized than those in winter. These variations were significantly correlated with temperature, total phosphorus and sludge volume index. However, no significant differences were found among microbial community across five compartments in terms of β diversity. A core community of keystone taxa was identified, playing key roles in eight nitrogen and eleven phosphorus cycling pathways. Understanding the assembly mechanisms, co-occurrence patterns, and functional roles of microbial communities is essential for the design and optimization of biotechnological treatment processes in WWTPs.}, }
@article {pmid39298952, year = {2024}, author = {Liu, J and Shi, J and Hu, Y and Su, Y and Zhang, Y and Wu, X}, title = {Flumethrin exposure perturbs gut microbiota structure and intestinal metabolism in honeybees (Apis mellifera).}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {135886}, doi = {10.1016/j.jhazmat.2024.135886}, pmid = {39298952}, issn = {1873-3336}, mesh = {Animals ; Bees/drug effects/metabolism ; *Pyrethrins/toxicity ; *Gastrointestinal Microbiome/drug effects ; *Insecticides/toxicity ; Catalase/metabolism ; Superoxide Dismutase/metabolism ; Glutathione Transferase/metabolism ; Intestines/drug effects/microbiology ; }, abstract = {Flumethrin mitigates Varroa's harm to honeybee colonies; however, its residues in colonies threaten the fitness of honeybee hosts and gut microbiota. Our previous research has shown that flumethrin induces significant physiological effects on honeybee larvae; but the effects of flumethrin on the gut microbiota and metabolism of adult honeybees are still unknown. In this study, 1-day-old honeybees were exposed to 0, 0.01, 0.1, and 1 mg/L flumethrin for 14 days and the impacts of flumethrin on the intestinal system were evaluated. The results showed that exposure to 1 mg/L flumethrin significantly reduced honeybee survival and the activities of antioxidative enzymes (superoxide dismutase and catalase) and detoxification enzymes (glutathione S-transferase) in honeybee heads. Moreover, exposure to 0.01, 0.1, and 1 mg/L flumethrin significantly decreased the diversity of the honeybee gut microbiota. Results from untargeted metabolomics showed that long-term exposure to 0.01, 0.1, and 1 mg/L flumethrin caused changes in the metabolic pathways of honeybee gut microbes. Furthermore, increased metabolism of phenylalanine, tyrosine, and tryptophan derivatives was observed in honeybee gut microbes. These findings underscore the importance of careful consideration in using pesticides in apiculture and provide a basis for safeguarding honeybees from pollutants, considering the effects on gut microbes.}, }
@article {pmid39298897, year = {2024}, author = {Wang, N and Li, S and Shi, M and Ni, N and Zhang, X and Guo, X and Lin, H and Luo, Y}, title = {Trajectory of antibiotic resistome response to antibiotics gradients: A comparative study from pharmaceutical and associated wastewater treatment plants to receiving river.}, journal = {Water research}, volume = {266}, number = {}, pages = {122444}, doi = {10.1016/j.watres.2024.122444}, pmid = {39298897}, issn = {1879-2448}, mesh = {*Anti-Bacterial Agents/pharmacology ; *Wastewater/microbiology ; *Rivers/microbiology/chemistry ; *Drug Resistance, Microbial/genetics ; Waste Disposal, Fluid ; Water Pollutants, Chemical ; Microbiota/drug effects ; }, abstract = {Pharmaceutical wastewater often contains significant levels of antibiotic residues, which continuously induce and promote antibiotic resistance during the sewage treatment process. However, the specific impact of antibiotics on the emergence of antibiotic resistance genes (ARGs), microbiomes, and mobile genetic elements (MGEs), as well as the dose-response relationship remain unclear. Herein, through metagenomic sequencing and analysis, we investigated the fate, transmission, and associated risk of ARGs over a ten-year period of exposure to a gradient of sulfonamide antibiotics at a pharmaceutical wastewater treatment plant (PWWTP), an associated wastewater treatment plant (WWTP), and the receiving river. Through abundance comparison and principal co-ordinates analysis (PCoA), our results revealed distinct ARG, microbiome, and MGE profiles across different antibiotic concentrations. Notably, there was a decreasing trend in the abundance of ARGs and MGEs as the antibiotic concentrations were attenuated (p < 0.05). Further partial least squares path modeling analysis, Procrustes analysis and network analysis indicated that variation in MGEs and microbiomes were the driving forces behind the distribution of ARGs. Based on these findings, we proposed an antibiotic-microbiome-MGE-ARG dissemination paradigm, in which integrons as key drivers were closely associated with prevalent ARGs such as sul1, sul2, and aadA. With a focus on human pathogenic bacteria and the associated health risks of ARGs, we conducted pathogen source analysis and calculated the antibiotic resistome risk index (ARRI). Our findings highlighted potential risks associated with the transition from PWWTP to WWTP, raising concerns regarding risk amplification due to the mixed treatment of antibiotic-laden industrial wastewater and domestic sewage. Overall, the results of our study provide valuable information for optimizing wastewater treatment practices to better manage antibiotic resistance.}, }
@article {pmid39298862, year = {2024}, author = {Karadayı, S and Yılmaz, &#x130; and Özbek, T and Karadayı, B}, title = {Transfer and persistence of microbiota markers from the human hand to the knife: A preliminary study.}, journal = {Journal of forensic and legal medicine}, volume = {107}, number = {}, pages = {102757}, doi = {10.1016/j.jflm.2024.102757}, pmid = {39298862}, issn = {1878-7487}, mesh = {Humans ; *Microbiota ; *Hand/microbiology ; *Touch ; RNA, Ribosomal, 16S ; Male ; High-Throughput Nucleotide Sequencing ; Bacteria/isolation &amp; purification/genetics ; Female ; Adult ; }, abstract = {New scientific techniques and methods are always needed to link the perpetrators to the incident or the crime scene. Recent microbiota studies based on NGS (Next-generation sequencing) show that various biological samples from crime scenes have the potential to be used in forensic investigations. Especially when DNA traces belonging to more than one person are insufficient to fully determine the genetic profile, a secret sample, such as a microbiota sample created by the suspect's touch, can be used. In this preliminary study, a fictionalized experimental model was designed to investigate the transfer and persistence of the hand microbiome on the knife handle, which has a high potential to be used in criminal incidents, by metagenomic analysis methods. In addition, it was aimed to determine the transfer of specific bacterial species identified only to the person among the five participants onto the knife handle and their persistence over time. In the first stage of the research, samples were collected from the hands of 5 volunteer participants using the swap method, including their palms. Then, after each participant held a different knife, samples were collected from the knife handles via swabs from different angles of the knives at 4 and 24 h and analyzed by metagenomic methods. The findings of this preliminary study showed that the heatmap graphs generated after UniFrac distance analysis were not successful in establishing any similarity between the hand samples and the post-transfer knife handle samples. Nonetheless, it was observed that the transfer of bacterial species detected in the hand samples to knives differed according to the individuals and some bacterial species were transferred to the knife samples held by the participants. The number of bacterial species detected that are specific to each participant's hand sample was 302 in total, and it was determined that a total of 8.28 % of these bacterial species were transferred to the knife handle samples of the 4th hour and 6.95 % to the knife samples of the 24th hour. In the presented study, considering the transfer of some bacterial species in the hand microbiome, which are effective in the variation between individuals, onto the knife; It has been evaluated that some rare bacterial species can be important potential markers to associate the object with the perpetrator.}, }
@article {pmid39298196, year = {2024}, author = {Barber, DG and Davies, CA and Hartley, IP and Tennant, RK}, title = {Evaluation of commercial RNA extraction kits for long-read metatranscriptomics in soil.}, journal = {Microbial genomics}, volume = {10}, number = {9}, pages = {}, pmid = {39298196}, issn = {2057-5858}, mesh = {*Soil Microbiology ; Microbiota/genetics ; Soil/chemistry ; Transcriptome ; Gene Expression Profiling/methods ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing/methods ; Sequence Analysis, RNA/methods ; RNA/genetics/isolation &amp; purification ; RNA, Bacterial/genetics/isolation &amp; purification ; }, abstract = {Metatranscriptomic analysis of the soil microbiome has the potential to reveal molecular mechanisms that drive soil processes regulated by the microbial community. Therefore, RNA samples must be of sufficient yield and quality to robustly quantify differential gene expression. While short-read sequencing technology is often favoured for metatranscriptomics, long-read sequencing has the potential to provide several benefits over short-read technologies. The ability to resolve complete transcripts on a portable sequencing platform for a relatively low capital expenditure makes Oxford Nanopore Technology an attractive prospect for addressing many of the challenges of soil metatranscriptomics. To fully enable long-read metatranscriptomic analysis of the functional molecular pathways expressed in these diverse habitats, RNA purification methods from soil must be optimised for long-read sequencing. Here we compare RNA samples purified using five commercially available extraction kits designed for use with soil. We found that the Qiagen RNeasy PowerSoil Total RNA Kit performed the best across RNA yield, quality and purity and was robust across different soil types. We found that sufficient sequencing depth can be achieved to characterise the active community for total RNA samples using Oxford Nanopore Technology, and discuss its current limitations for differential gene expression analysis in soil studies.}, }
@article {pmid39294312, year = {2024}, author = {Li, D and Wang, Y and Li, X and Zhang, Z and Wang, G and Zhang, Y and Chen, L}, title = {Exploring microbial diversity and function in companion planting systems of white clover and orchard grass.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21609}, pmid = {39294312}, issn = {2045-2322}, support = {32172769//National Natural Science Foundation of China/ ; }, mesh = {*Trifolium/microbiology/genetics/growth &amp; development ; *Soil Microbiology ; *Rhizosphere ; *Microbiota/genetics ; Dactylis/genetics/microbiology ; Metagenomics/methods ; Bacteria/genetics/classification ; Biodiversity ; }, abstract = {Companion planting of white clover (Trifolium repens L.) with orchard grass (Dactylis glomerata L.), a famous hay grass, improves the forage quality of orchard grass. Microbiome profiling techniques can reveal the specific role of white clover companion planting with orchard grass. This study aimed to explore the microbiome distribution and gene functions of rhizosphere and non-rhizosphere soil via companion planting systems of white clover and orchard grass. From metagenomics sequencing analysis, we confirmed the significant role of white clover on soil environment modeling during companion planting with orchard grass. Twenty-eight biomarkers of rhizosphere soil organisms were identified during companion planting, including Proteobacteria, Betaproteobacteria, Flavobacteriia, and Caulobacterales. The number of gene functions of nitrogen and carbon fixation in companion planting was higher than that in single plants, indicating new functional flora for companion planting. We characterized specific rhizosphere effects, typical biomarker flora, and potential regulatory mechanisms for white clover-related companion planting by metagenomics analyses.}, }
@article {pmid39294129, year = {2024}, author = {Bozzi, D and Neuenschwander, S and Cruz Dávalos, DI and Sousa da Mota, B and Schroeder, H and Moreno-Mayar, JV and Allentoft, ME and Malaspinas, AS}, title = {Towards predicting the geographical origin of ancient samples with metagenomic data.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21794}, pmid = {39294129}, issn = {2045-2322}, mesh = {Humans ; *DNA, Ancient/analysis ; *Metagenomics/methods ; *Metagenome ; Geography ; Microbiota/genetics ; }, abstract = {Reconstructing the history-such as the place of birth and death-of an individual sample is a fundamental goal in ancient DNA (aDNA) studies. However, knowing the place of death can be particularly challenging when samples come from museum collections with incomplete or erroneous archives. While analyses of human DNA and isotope data can inform us about the ancestry of an individual and provide clues about where the person lived, they cannot specifically trace the place of death. Moreover, while ancient human DNA can be retrieved, a large fraction of the sequenced molecules in ancient DNA studies derive from exogenous DNA. This DNA-which is usually discarded in aDNA analyses-is constituted mostly by microbial DNA from soil-dwelling microorganisms that have colonized the buried remains post-mortem. In this study, we hypothesize that remains of individuals buried in the same or close geographic areas, exposed to similar microbial communities, could harbor more similar metagenomes. We propose to use metagenomic data from ancient samples' shotgun sequencing to locate the place of death of a given individual which can also help to solve cases of sample mislabeling. We used a k-mer-based approach to compute similarity scores between metagenomic samples from different locations and propose a method based on dimensionality reduction and logistic regression to assign a geographical origin to target samples. We apply our method to several public datasets and observe that individual samples from closer geographic locations tend to show higher similarities in their metagenomes compared to those of different origin, allowing good geographical predictions of test samples. Moreover, we observe that the genus Streptomyces commonly infiltrates ancient remains and represents a valuable biomarker to trace the samples' geographic origin. Our results provide a proof of concept and show how metagenomic data can also be used to shed light on the place of origin of ancient samples.}, }
@article {pmid39293811, year = {2024}, author = {Liu, Y and Ong, SL and Gedye, K and Truglio, M and Prabakar, S}, title = {Behind the scenes: metagenomic analysis of bacterial communities in sustainable depilation of sheepskin.}, journal = {Journal of applied microbiology}, volume = {135}, number = {11}, pages = {}, doi = {10.1093/jambio/lxae244}, pmid = {39293811}, issn = {1365-2672}, support = {LSRX-1801//the New Zealand Ministry of Business, Innovation and Employment (MBIE)/ ; }, mesh = {*Bacteria/genetics/isolation &amp; purification/classification ; *Metagenomics ; *Microbiota ; Animals ; Acetic Acid/metabolism ; Hair Removal ; }, abstract = {AIM: The leather industry is embracing eco-friendly technologies for both regulatory compliance and sustainable growth. While enzymatic depilation provides a greener alternative to traditional beamhouse methods, its complexity often leads to higher costs. To address this, we examined the performance of sheepskins' native bacterial flora in acetic acid conditions with low-environmental impact.<br><br>METHODS AND RESULTS: Utilizing metagenomic techniques, we analyzed the bacterial community dynamics during the depilation process. This investigation revealed a notable increase in microbial diversity and richness in acetic acid treatments compared to water treatments. At the class level, a post-processing decrease in Gammaproteobacteria dominance was observed, while Actinomycetia numbers surged in the acetic acid group. In contrast, the water group showed an increase in Bacteroidia. Order-level analysis indicated reductions in Pseudomonadales and increases in Actinomycetales with acetic acid treatment, whereas Flavobacteriales was more prevalent in water-treated liquors. At the family level, Moraxellaceae decreased and Micrococcaceae increased in the acetic acid group, in contrast to the marked rise of Weeksellaceae in the water group. Temporal analyses further highlighted the evolving bacterial landscapes under different treatments. Moreover, acetic acid treatment fostered a stable microbial community, beneficial for sustainable leather processing. Functional pathways were predicted using PICRUSt2. It showed that significantly enriched degradation pathways in the water group were less abundant in the acetic acid group, potentially preventing substrate matrix damage during depilation.<br><br>CONCLUSION: The study underscores the transformative potential of acetic acid for the leather industry, offering a pathway to reduce pollution while maintaining economic viability. By enhancing our understanding of microbial interactions during depilation, this study opens avenues for refining these eco-friendly techniques. Our findings advocate for a shift towards greener depilation methods and contribute to the broader dialogue on sustainable manufacturing practices, emphasizing the importance of leveraging indigenous microbial communities for environmental and economic gains.}, }
@article {pmid39293338, year = {2024}, author = {Bakir-Gungor, B and Temiz, M and Inal, Y and Cicekyurt, E and Yousef, M}, title = {CCPred: Global and population-specific colorectal cancer prediction and metagenomic biomarker identification at different molecular levels using machine learning techniques.}, journal = {Computers in biology and medicine}, volume = {182}, number = {}, pages = {109098}, doi = {10.1016/j.compbiomed.2024.109098}, pmid = {39293338}, issn = {1879-0534}, mesh = {*Colorectal Neoplasms/microbiology/genetics/metabolism ; Humans ; *Machine Learning ; *Biomarkers, Tumor/genetics ; *Metagenomics/methods ; *Gastrointestinal Microbiome/genetics ; Metagenome/genetics ; Software ; }, abstract = {Colorectal cancer (CRC) ranks as the third most common cancer globally and the second leading cause of cancer-related deaths. Recent research highlights the pivotal role of the gut microbiota in CRC development and progression. Understanding the complex interplay between disease development and metagenomic data is essential for CRC diagnosis and treatment. Current computational models employ machine learning to identify metagenomic biomarkers associated with CRC, yet there is a need to improve their accuracy through a holistic biological knowledge perspective. This study aims to evaluate CRC-associated metagenomic data at species, enzymes, and pathway levels via conducting global and population-specific analyses. These analyses utilize relative abundance values from human gut microbiome sequencing data and robust classification models are built for disease prediction and biomarker identification. For global CRC prediction and biomarker identification, the features that are identified by SelectKBest (SKB), Information Gain (IG), and Extreme Gradient Boosting (XGBoost) methods are combined. Population-based analysis includes within-population, leave-one-dataset-out (LODO) and cross-population approaches. Four classification algorithms are employed for CRC classification. Random Forest achieved an AUC of 0.83 for species data, 0.78 for enzyme data and 0.76 for pathway data globally. On the global scale, potential taxonomic biomarkers include ruthenibacterium lactatiformanas; enzyme biomarkers include RNA 2' 3' cyclic 3' phosphodiesterase; and pathway biomarkers include pyruvate fermentation to acetone pathway. This study underscores the potential of machine learning models trained on metagenomic data for improved disease prediction and biomarker discovery. The proposed model and associated files are available at https://github.com/TemizMus/CCPRED.}, }
@article {pmid39289490, year = {2024}, author = {Bai, B and Tuerxun, G and Tuerdi, A and Maimaiti, R and Sun, Y and Abudukerimu, A}, title = {Analysis of vaginal flora diversity and study on the role of Porphyromonas asaccharolytica in promoting IL-1β in regulating cervical cancer.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21731}, pmid = {39289490}, issn = {2045-2322}, support = {2022D01C185//Natural Science Foundation of the Xinjiang Uygur Autonomous Region/ ; }, mesh = {Female ; Humans ; *Uterine Cervical Neoplasms/microbiology/virology/pathology/genetics ; *Vagina/microbiology ; *Porphyromonas/genetics/isolation &amp; purification ; *Interleukin-1beta/genetics/metabolism ; *Microbiota/genetics ; Adult ; RNA, Ribosomal, 16S/genetics ; Middle Aged ; Papillomavirus Infections/virology/microbiology/complications ; }, abstract = {Cervical cancer, a prevalent malignancy in the female reproductive tract, exhibits a high incidence. Existing evidence indicates a robust correlation between alterations in vaginal flora composition and the progression of cervical cancer. Nevertheless, there is a lack of clarity concerning the specific microorganisms within the vaginal microbiota that are linked to the onset and development of cervical cancer, as well as the mechanisms through which they exert carcinogenic effects. The 16 S ribosomal (rRNA) and metagenomic sequencing technology were used to analyze vaginal microorganisms, and screening for human papillomavirus (HPV) positive cervical cancer-associated microbial markers using fold change in mean bacterial abundance. Moreover, vaginal microenvironmental factors were detected, and the local vaginal inflammatory state in patients with cervical cancer was subjected to assay via qRT-PCR and ELISA. The hub inflammatory genes were screened by transcriptome sequencing after co-culture of bacteria and normal cervical epithelial cells, and an in vitro model was utilized to assess the impacts of inflammatory factors on cervical cancer. Both cervical cancer patients and HPV-positive patients showed significant changes in the composition of the vaginal flora, characterised by a decrease in the abundance of Lactobacillus and an increase in the abundance of a variety of anaerobic bacteria; The microbial sequencing identified Porphyromonas, Porphyromonas_asaccharolytica, and Porphyromonas_uenonis as microbial markers for HPV-associated cervical cancer. Vaginal inflammatory factors in patients with cervical cancer were overexpressed. After Porphyromonas_asaccharolytica intervention on cervical epithelial H8 cells, interleukin (IL)-1β, a hub differential gene, markedly promoted tumor-associated biological behaviors at the in vitro cytological level in cervical cancer. This study for the first demonstrated that Porphyromonas, Porphyromonas_asaccharolytica, and Porphyromonas_uenonis could serve as novel microbial markers for cervical cancer. Moreover, Porphyromonas_asaccharolytica was identified as having the ability to induce the overexpression of inflammatory genes in cervical epithelial cells to create a favorable microenvironment for the onset and development of cervical cancer. The effects of dysbacteriosis on cervical cancer were microbiologically elucidated.}, }
@article {pmid39289365, year = {2024}, author = {Peng, X and Wang, S and Wang, M and Feng, K and He, Q and Yang, X and Hou, W and Li, F and Zhao, Y and Hu, B and Zou, X and Deng, Y}, title = {Metabolic interdependencies in thermophilic communities are revealed using co-occurrence and complementarity networks.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {8166}, pmid = {39289365}, issn = {2041-1723}, mesh = {*Metabolic Networks and Pathways/genetics ; *Archaea/genetics/metabolism ; *Bacteria/metabolism/genetics/classification ; *Metagenome/genetics ; *Microbiota ; Hot Springs/microbiology ; Phylogeny ; Microbial Interactions ; Hot Temperature ; }, abstract = {Microbial communities exhibit intricate interactions underpinned by metabolic dependencies. To elucidate these dependencies, we present a workflow utilizing random matrix theory on metagenome-assembled genomes to construct co-occurrence and metabolic complementarity networks. We apply this approach to a temperature gradient hot spring, unraveling the interplay between thermal stress and metabolic cooperation. Our analysis reveals an increase in the frequency of metabolic interactions with rising temperatures. Amino acids, coenzyme A derivatives, and carbohydrates emerge as key exchange metabolites, forming the foundation for syntrophic dependencies, in which commensalistic interactions take a greater proportion than mutualistic ones. These metabolic exchanges are most prevalent between phylogenetically distant species, especially archaea-bacteria collaborations, as a crucial adaptation to harsh environments. Furthermore, we identify a significant positive correlation between basal metabolite exchange and genome size disparity, potentially signifying a means for streamlined genomes to leverage cooperation with metabolically richer partners. This phenomenon is also confirmed by another composting system which has a similar wide range of temperature fluctuations. Our workflow provides a feasible way to decipher the metabolic complementarity mechanisms underlying microbial interactions, and our findings suggested environmental stress regulates the cooperative strategies of thermophiles, while these dependencies have been potentially hardwired into their genomes during co-evolutions.}, }
@article {pmid39287376, year = {2024}, author = {Bucher-Johannessen, C and Senthakumaran, T and Avershina, E and Birkeland, E and Hoff, G and Bemanian, V and Tunsjø, H and Rounge, TB}, title = {Species-level verification of Phascolarctobacterium association with colorectal cancer.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0073424}, pmid = {39287376}, issn = {2379-5077}, support = {2020056//Ministry of Health and Care Services | Helse S&#xf8;r-&#xd8;st RHF (sorost)/ ; 2022067//Ministry of Health and Care Services | Helse S&#xf8;r-&#xd8;st RHF (sorost)/ ; 190179//Kreftforeningen (NCS)/ ; 198048//Kreftforeningen (NCS)/ ; 202401/WT_/Wellcome Trust/United Kingdom ; }, mesh = {Humans ; *Colorectal Neoplasms/microbiology/pathology ; Male ; Female ; *RNA, Ribosomal, 16S/genetics ; Gastrointestinal Microbiome/genetics ; Norway/epidemiology ; Metagenome ; Middle Aged ; Adenoma/microbiology/genetics ; Aged ; }, abstract = {We have previously demonstrated an association between increased abundance of Phascolarctobacterium and colorectal cancer (CRC) and adenomas in two independent Norwegian cohorts. Here we seek to verify our previous findings using new cohorts and methods. In addition, we characterize lifestyle and sex specificity, the functional potential of the Phascolarctobacterium species, and their interaction with other microbial species. We analyze Phascolarctobacterium with 16S rRNA sequencing, shotgun metagenome sequencing, and species-specific qPCR, using 2350 samples from three Norwegian cohorts-CRCAhus, NORCCAP, and CRCbiome-and a large publicly available data set, curatedMetagenomicData. Using metagenome-assembled genomes from the CRCbiome study, we explore the genomic characteristics and functional potential of the Phascolarctobacterium pangenome. Three species of Phascolarctobacterium associated with adenoma/CRC were consistently detected by qPCR and sequencing. Positive associations with adenomas/CRC were verified for Phascolarctobacterium succinatutens and negative associations were shown for Phascolarctobacterium faecium and adenoma in curatedMetagenomicData. Men show a higher prevalence of P. succinatutens across cohorts. Co-occurrence among Phascolarctobacterium species was low (<6%). Each of the three species shows distinct microbial composition and forms distinct correlation networks with other bacterial taxa, although Dialister invisus was negatively correlated to all investigated Phascolarctobacterium species. Pangenome analyses showed P. succinatutens to be enriched for genes related to porphyrin metabolism and degradation of complex carbohydrates, whereas glycoside hydrolase enzyme 3 was specific to P. faecium.IMPORTANCEUntil now Phascolarctobacterium has been going under the radar as a CRC-associated genus despite having been noted, but overseen, as such for over a decade. We found not just one, but two species of Phascolarctobacterium to be associated with CRC-Phascolarctobacterium succinatutens was more abundant in adenoma/CRC, while Phascolarctobacterium faecium was less abundant in adenoma. Each of them represents distinct communities, constituted by specific microbial partners and metabolic capacities-and they rarely occur together in the same patients. We have verified that P. succinatutens is increased in adenoma and CRC and this species should be recognized among the most important CRC-associated bacteria.}, }
@article {pmid39287374, year = {2024}, author = {Vinogradova, E and Mukhanbetzhanov, N and Nurgaziyev, M and Jarmukhanov, Z and Aipova, R and Sailybayeva, A and Bekbossynova, M and Kozhakhmetov, S and Kushugulova, A}, title = {Impact of urbanization on gut microbiome mosaics across geographic and dietary contexts.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0058524}, pmid = {39287374}, issn = {2379-5077}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics ; *Urbanization ; Male ; Female ; Kazakhstan/epidemiology ; *Diet ; Adult ; Rural Population/statistics &amp; numerical data ; Middle Aged ; Prospective Studies ; RNA, Ribosomal, 16S/genetics ; Urban Population/statistics &amp; numerical data ; Bacteria/genetics/classification/isolation &amp; purification ; Feces/microbiology ; Young Adult ; }, abstract = {UNLABELLED: This study provides a comprehensive assessment of how urban-rural divides influence gut microbial diversity and composition across the distinct geographical landscapes of Kazakhstan, elucidating the intricate interplay between lifestyle, environment, and gut microbiome. In this prospective cohort study, we enrolled 651 participants from urban centers and rural settlements across Kazakhstan, following ethical approval and informed consent. Comprehensive demographic, dietary, and stool sample data were collected. 16S rRNA gene sequencing and shotgun metagenomics techniques were employed to delineate the intricate patterns of the gut microbiome. A rigorous statistical framework dissected the interplay between urbanization gradients, geography, dietary lifestyles, and microbial dynamics. Our findings demonstrate a stark microbial divide between urban and rural gut ecosystems. The study found significant differences in gut microbiome diversity and composition between urban and rural populations in Kazakhstan. Urban microbiomes exhibited reduced diversity, higher Firmicutes/Bacteroidetes ratios, and increased prevalence of genera Coprococcus and Parasutterella. In contrast, rural populations had greater microbial diversity and abundance of Ligilactobacillus, Sutterella, and Paraprevotella. Urbanization also influenced dietary patterns, with urban areas consuming more salt, cholesterol, and protein, while rural areas had diets richer in carbohydrates and fiber. The study also identified distinct patterns in the prevalence of antibiotic resistance genes and virulence factors between urban and rural gut microbiomes. This study sheds light on how urbanization may be deeply involved in shaping the intricate mosaic of the gut microbiome across Kazakhstan's diverse geographical and dietary landscapes, underscoring the complex interplay between environmental exposures, dietary lifestyles, and the microbial residents inhabiting our intestines.<br><br>IMPORTANCE: The study examined gut microbiome composition across diverse geographical locations in Kazakhstan, spanning urban centers and rural settlements. This allows for thoroughly investigating how urbanization gradients and geographic factors shape the gut microbiome. The study's examination of the gut resistome and prevalence of virulence-associated genes provide essential insights into the public health implications of urbanization-driven microbiome alterations. Collecting comprehensive demographic, dietary, and stool sample data enables the researchers to better understand the relationships between urbanization, nutritional patterns, and gut microbiome composition. The findings have important implications for understanding how urbanization-driven microbiome changes may impact human health and well-being, paving the way for tailored interventions to restore a balanced gut microbial ecology.}, }
@article {pmid39287279, year = {2024}, author = {Xing, W and Yu, J and Cui, S and Liu, L and Zhi, Y and Zhang, T and Zhou, J}, title = {Analysis of the correlation between gut microbiome imbalance and the development of endometrial cancer based on metagenomics.}, journal = {Medicine}, volume = {103}, number = {37}, pages = {e39596}, pmid = {39287279}, issn = {1536-5964}, mesh = {Humans ; Female ; *Endometrial Neoplasms/microbiology/genetics ; *Gastrointestinal Microbiome/genetics ; Case-Control Studies ; Middle Aged ; Prospective Studies ; *Metagenomics/methods ; Aged ; Adult ; }, abstract = {Endometrial cancer (EC) is the most prevalent gynecologic malignancy, with a higher risk in obese women, suggesting the potential involvement of gut microbiota in the progression of EC. However, there is no direct evidence of a connection between EC and the human gut microbiota. Using metagenomic sequencing, we investigated the relationship between gut microbiome imbalance and cancer development in patients with EC. In this prospective case-control study, we included 15 patients with EC based on endometrial biopsy in the case group and 15 women admitted to the hospital for female pelvic floor issues during the same time who did not have endometrial lesions from January 2023 to June 2023 in control group. The microbiota structure of EC cases and controls without benign or malignant endometrial lesions during the same time period was analyzed using metagenomic sequencing technology. We employed Alpha diversity analysis to reflect the richness and diversity of microbial communities. Statistical algorithm Bray-Curtis was utilized to calculate pairwise distances between samples, obtaining a beta diversity distance matrix. Subsequently, hierarchical clustering analysis was conducted based on the distance matrix. The results showed that the composition of bacterial colonies in both groups was dominated by Firmicutes, which had a higher proportion in the control group, followed by Bacteroidetes in the control group and Proteobacteria and Bacteroidetes in the case group. The abundance of Klebsiella (P = .02) was significantly higher, and the abundance of Alistipes (P = .04), Anearobutyricum (P = .01), and bacteria in Firmicutes such as Oscillospira and Catenibacterium was markedly lower in the case group than in the control group. These results demonstrated conclusively that a gut microbiome imbalance was associated with the development of EC.}, }
@article {pmid39284445, year = {2024}, author = {Huo, C and Zhang, J and Yang, X and Li, X and Su, Y and Chen, Z}, title = {Dry season irrigation promotes nutrient cycling by reorganizing Eucalyptus rhizosphere microbiome.}, journal = {The Science of the total environment}, volume = {954}, number = {}, pages = {176307}, doi = {10.1016/j.scitotenv.2024.176307}, pmid = {39284445}, issn = {1879-1026}, mesh = {*Eucalyptus ; *Rhizosphere ; *Microbiota ; *Soil Microbiology ; *Agricultural Irrigation/methods ; China ; *Fertilizers ; Phosphorus ; Soil/chemistry ; Nitrogen/metabolism ; Seasons ; Bacteria/metabolism ; }, abstract = {In southern China, seasonal droughts and low soil phosphorus content constrain the productivity of Eucalyptus trees. To understand the rhizosphere microbiome response to the dry season, metagenomic sequencing analysis was used to investigate the 6-year-old Eucalyptus rhizosphere microbiome under four different irrigation and fertilization treatments. The results showed that irrigation and fertilization during the dry season significantly altered the composition of microbiome in the rhizosphere soil of Eucalyptus plantations. The soil physicochemical properties and enzyme activity explained 30.73 % and 29.75 % of the changes in bacterial and fungal community structure in Eucalyptus rhizosphere soil, respectively. Irrigation and fertilization during the dry season significantly altered the physicochemical properties of rhizosphere soil. Compared with the seasonal drought without fertilizer treatment (CK), the dry season irrigation with fertilizer treatment (WF) significantly increased the content of total nitrogen (46.34 %), available nitrogen (37.72 %), available phosphorus (440.9 %), and organic matter (35.34 %). Soil organic matter (OM), pH, and available phosphorus (AP) were key environmental factors influencing the microbial community composition. Moreover, irrigation and fertilization promoted carbon fixation and nitrogen and phosphorus mineralization, increasing soil OM content and the availability of inorganic nitrogen and phosphorus. Meanwhile, compared to the CK, the increase of acid phosphatase (16.81 %), invertase (146.89 %)and urease (59.45 %) in rhizosphere soil under irrigation (W) treatment further proves that dry season irrigation promote the soil carbon, nitrogen and phosphorus cycles. Irrigation and fertilization treatment alleviated the constraints of low phosphorus in southern China's soil, which promoted Eucalyptus productivity. In conclusion, we suggest implementing reasonable irrigation and fertilization strategies in the production practice of Eucalyptus and utilizing microbial resources to improve soil fertility and Eucalyptus productivity.}, }
@article {pmid39283121, year = {2024}, author = {Machado, DT and Dias, BdC and Cayô, R and Gales, AC and Marques de Carvalho, F and Vasconcelos, ATR}, title = {Uncovering new Firmicutes species in vertebrate hosts through metagenome-assembled genomes with potential for sporulation.}, journal = {Microbiology spectrum}, volume = {12}, number = {11}, pages = {e0211324}, pmid = {39283121}, issn = {2165-0497}, support = {E-26/210.012/2020//Funda&#xe7;&#xe3;o Carlos Chagas Filho de Amparo &#xe0; Pesquisa do Estado do Rio de Janeiro (FAPERJ)/ ; 88887.677436/2022-00//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior (CAPES)/ ; 402659/2018-0,443805/2018-0//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; OPP1193112//Bill and Melinda Gates Foundation (GF)/ ; 88887.508687/2020-00//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior (CAPES)/ ; 302023/2024-0//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; 307915/2022-0//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; 312066/2019-8//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; 307145/2021-2//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; E-26/201.046/2022//Funda&#xe7;&#xe3;o Carlos Chagas Filho de Amparo &#xe0; Pesquisa do Estado do Rio de Janeiro (FAPERJ)/ ; }, mesh = {Animals ; *Spores, Bacterial/genetics/growth &amp; development ; *Phylogeny ; *Metagenome ; *Genome, Bacterial/genetics ; *Firmicutes/genetics/classification ; Humans ; Cattle ; Swine ; Gastrointestinal Microbiome/genetics ; Vertebrates/microbiology ; Poultry/microbiology ; }, abstract = {Metagenome-assembled genomes (MAGs) have contributed to identifying non-culturable microorganisms and understanding their ecological functions. MAGs offer an advantage in investigating sporulation-associated genes, especially given the difficulty of isolating many species residing in the gut microbiota of multiple hosts. Bacterial sporulation is a key survival mechanism with implications for pathogenicity and biotechnology. Here, we investigate MAGs from vertebrate hosts, emphasizing taxonomic identification and identifying sporulation-associated genes in potential novel species within the Firmicutes phylum. We identified potential new species in the classes Clostridia (Borkfalkiaceae, Lachnospiraceae, Monoglobaceae, and Oscillospiraceae families) and Bacilli (Bacillaceae and Erysipelotrichaceae families) through phylogenetic and functional pathway analyses, highlighting their sporulation potential. Our study covers 146 MAGs, 124 of them without refined taxonomic assignments at the family level. We found that Clostridia and Bacilli have unique sporulation gene profiles in the refined family MAGs for cattle, swine, poultry, and human hosts. The presence of genes related to Spo0A regulon, engulfment, and spore cortex in MAGs underscores fundamental mechanisms in sporulation processes in currently uncharacterized species with sporulation potential from metagenomic dark matter. Furthermore, genomic analyses predict sporulation potential based on gene presence, genome size, and metabolic pathways involved in spore formation. We emphasize MAGs covering families not yet characterized through the phylogenetic analysis, and with extensive potential for spore-forming bacteria within Clostridia, Bacilli, UBA4882, and UBA994 classes. These findings contribute to exploring spore-forming bacteria, which provides evidence for novel species diversity in multiple hosts, their adaptive strategies, and potential applications in biotechnology and host health.IMPORTANCESpores are essential for bacterial survival in harsh environments, facilitating their persistence and adaptation. Exploring sporulation-associated genes in metagenome-assembled genomes (MAGs) from different hosts contributes to clinical and biotechnological domains. Our study investigated the extent of genes associated with bacterial sporulation in MAGs from poultry, swine, cattle, and humans, revealing these genes in uncultivated bacteria. We identified potential novel Firmicutes species with sporulation capabilities through phylogenetic and functional analyses. Notably, MAGs belonging to Clostridia, Bacilli, and unknown classes, namely UBA4882 and UBA994, remained uncharacterized at the family level, which raises the hypothesis that sporulation would also be present in these genomes. These findings contribute to our understanding of microbial adaptation and have implications for microbial ecology, underlining the importance of sporulation in Firmicutes across different hosts. Further studies into novel species and their sporulation capability can contribute to bacterial maintenance mechanisms in various organisms and their applications in biotechnology studies.}, }
@article {pmid39283083, year = {2024}, author = {Brennan, C and Belda-Ferre, P and Zuffa, S and Charron-Lamoureux, V and Mohanty, I and Ackermann, G and Allaband, C and Ambre, M and Boyer, T and Bryant, M and Cantrell, K and Gonzalez, A and McDonald, D and Salido, RA and Song, SJ and Wright, G and Dorrestein, PC and Knight, R}, title = {Clearing the plate: a strategic approach to mitigate well-to-well contamination in large-scale microbiome studies.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0098524}, pmid = {39283083}, issn = {2379-5077}, support = {U19 AG063744/AG/NIA NIH HHS/United States ; U24 AG021886/AG/NIA NIH HHS/United States ; U19AG063744//HHS | National Institutes of Health (NIH)/ ; }, mesh = {*Microbiota/genetics ; Humans ; *RNA, Ribosomal, 16S/genetics ; Specimen Handling/methods ; }, abstract = {UNLABELLED: Large-scale studies are essential to answer questions about complex microbial communities that can be extremely dynamic across hosts, environments, and time points. However, managing acquisition, processing, and analysis of large numbers of samples poses many challenges, with cross-contamination being the biggest obstacle. Contamination complicates analysis and results in sample loss, leading to higher costs and constraints on mixed sample type study designs. While many researchers opt for 96-well plates for their workflows, these plates present a significant issue: the shared seal and weak separation between wells leads to well-to-well contamination. To address this concern, we propose an innovative high-throughput approach, termed as the Matrix method, which employs barcoded Matrix Tubes for sample acquisition. This method is complemented by a paired nucleic acid and metabolite extraction, utilizing 95% (vol/vol) ethanol to stabilize microbial communities and as a solvent for extracting metabolites. Comparative analysis between conventional 96-well plate extractions and the Matrix method, measuring 16S rRNA gene levels via quantitative polymerase chain reaction, demonstrates a notable decrease in well-to-well contamination with the Matrix method. Metagenomics, 16S rRNA gene amplicon sequencing (16S), and untargeted metabolomics analysis via liquid chromatography-tandem mass spectrometry (LC-MS/MS) confirmed that the Matrix method recovers reproducible microbial and metabolite compositions that can distinguish between subjects. This advancement is critical for large-scale study design as it minimizes well-to-well contamination and technical variation, shortens processing times, and integrates with automated infrastructure for enhancing sample randomization and metadata generation.<br><br>IMPORTANCE: Understanding dynamic microbial communities typically requires large-scale studies. However, handling large numbers of samples introduces many challenges, with cross-contamination being a major issue. It not only complicates analysis but also leads to sample loss and increased costs and restricts diverse study designs. The prevalent use of 96-well plates for nucleic acid and metabolite extractions exacerbates this problem due to their wells having little separation and being connected by a single plate seal. To address this, we propose a new strategy using barcoded Matrix Tubes, showing a significant reduction in cross-contamination compared to conventional plate-based approaches. Additionally, this method facilitates the extraction of both nucleic acids and metabolites from a single tubed sample, eliminating the need to collect separate aliquots for each extraction. This innovation improves large-scale study design by shortening processing times, simplifying analysis, facilitating metadata curation, and producing more reliable results.}, }
@article {pmid39277616, year = {2024}, author = {Jia, Y and Shi, Y and Wang, J and Liu, H and Huang, Y and Wang, H and Liu, Y and Peng, J}, title = {Integrating metagenomics with metabolomics for gut microbiota and metabolites profiling in acute pancreatitis.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21491}, pmid = {39277616}, issn = {2045-2322}, support = {GZC20242045//Postdoctoral Fellowship Program of CPSF/ ; 2023zzts896//Fundamental Research Funds for Central Universities of the Central South University/ ; 82170661//National Natural Science Foundation of China/ ; 2023DK2002//Key Project of Research and Development Plan of Hunan Province/ ; }, mesh = {*Gastrointestinal Microbiome ; *Pancreatitis/microbiology/metabolism ; Animals ; *Metabolomics/methods ; *Metagenomics/methods ; Mice ; Metabolome ; Disease Models, Animal ; Dysbiosis/microbiology/metabolism ; Mice, Inbred C57BL ; Male ; Acute Disease ; }, abstract = {Acute pancreatitis (AP) is an inflammatory disease of the pancreas. Despite of a steadily increasing in morbidity and mortality, there is still no effective therapy. Gut microbial dysbiosis and its derived-metabolites disorder have been shown to play an important role in the development of AP, however, little is known regarding the crosstalk between gut microbiota and metabolites. In this study, we assessed the alterations in gut microbiota and metabolites by constructing three AP mouse models by means of metagenomic and metabolomic sequencing, and further clarified their relationship by correlation analysis. The results revealed that each model exhibited unique flora and metabolite profiles. KEGG analysis showed that the differential flora and metabolite-enriched pathway functions were correlated with lipid metabolism and amino acid metabolism. Moreover, two core differential bacterial species on Burkholderiales bacterium YL45 and Bifidobacterium pseudolongum along with eleven differential metabolites appeared to exert certain effects during the course of AP. In conclusion, further exploration of the crosstalk between microbiota and derived metabolites may provide novel insights and strategies into the diagnosis and treatment of AP.}, }
@article {pmid39277613, year = {2024}, author = {da Silva, S and Vuong, P and Amaral, JRV and da Silva, VAS and de Oliveira, SS and Vermelho, AB and Beale, DJ and Bissett, A and Whiteley, AS and Kaur, P and Macrae, A}, title = {The piranha gut microbiome provides a selective lens into river water biodiversity.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21518}, pmid = {39277613}, issn = {2045-2322}, support = {Bolsa de Doutorado//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico/ ; Bolsa de Iniciacao Cientifica//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico/ ; Bolsa de doutordo//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior/ ; PRINT 001//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior/ ; }, mesh = {*Rivers/microbiology ; *Gastrointestinal Microbiome/genetics ; Animals ; *Biodiversity ; Metagenome ; Metagenomics/methods ; Water Microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {Advances in omics technologies have enabled the in-depth study of microbial communities and their metabolic profiles from all environments. Here metagenomes were sampled from piranha (Serrasalmus rhombeus) and from river water from the Rio São Benedito (Amazon Basin). Shotgun metagenome sequencing was used to explore diversity and to test whether fish microbiomes are a good proxy for river microbiome studies. The results showed that the fish microbiomes were not significantly different from the river water microbiomes at higher taxonomic ranks. However, at the genus level, fish microbiome alpha diversity decreased, and beta diversity increased. This result repeated for functional gene abundances associated with specific metabolic categories (SEED level 3). A clear delineation between water and fish was seen for beta diversity. The piranha microbiome provides a good and representative subset of its river water microbiome. Variations seen in beta biodiversity were expected and can be explained by temporal variations in the fish microbiome in response to stronger selective forces on its biodiversity. Metagenome assembled genomes construction was better from the fish samples. This study has revealed that the microbiome of a piranha tells us a lot about its river water microbiome and function.}, }
@article {pmid39276741, year = {2024}, author = {Kumar, A and Lakhawat, SS and Singh, K and Kumar, V and Verma, KS and Dwivedi, UK and Kothari, SL and Malik, N and Sharma, PK}, title = {Metagenomic analysis of soil from landfill site reveals a diverse microbial community involved in plastic degradation.}, journal = {Journal of hazardous materials}, volume = {480}, number = {}, pages = {135804}, doi = {10.1016/j.jhazmat.2024.135804}, pmid = {39276741}, issn = {1873-3336}, mesh = {*Soil Microbiology ; *Waste Disposal Facilities ; *Biodegradation, Environmental ; *Plastics ; *Bacteria/genetics/classification/metabolism ; *Fungi/genetics ; Metagenomics ; RNA, Ribosomal, 16S/genetics ; Microbiota ; Soil Pollutants/metabolism ; }, abstract = {In this study, we have investigated microbial communities structure and function using high throughput amplicon sequencing and whole metagenomic sequencing of DNA extracted from different depths of a plastic-laden landfill site. With diverse taxonomic groups inhabiting the plastic-rich soil, our study demonstrates the remarkable adaptability of microbes to use this new substrate as a carbon source. FTIR spectroscopic analysis of soil indicated degradation of plastic as perceived from the carbonyl index of 0.16, 0.72, and 0.44 at 0.6, 0.9 and 1.2 m depth, respectively. Similarly, water contact angles of 108.7 degree, 99.7 degree, 62.7 degree, and 77.8 degree of plastic pieces collected at 0.3, 0.6, 0.9, and 1.2 m depths respectively showed increased wettability and hydrophilicity of the plastic. Amplicon analysis of 16S and 18 S rRNA revealed a high abundance of several plastic-degrading bacterial groups, including Pseudomonas, Rhizobiales, Micrococcaceae, Chaetomium, Methylocaldum, Micromonosporaceae, Rhodothermaceae and fungi, including Trichoderma, Aspergillus, Candida at 0.9 m. The co-existence of specific microbial groups at different depths of landfill site indicates importance of bacterial and fungal interactions for plastic. Whole metagenome analysis of soil sample at 0.9 m depth revealed a high abundance of genes encoding enzymes that participate in the biodegradation of PVC, polyethylene, PET, and polyurethane. Curation of the pathways related to the degradation of these materials provided a blueprint for plastic biodegradation in this ecosystem. Altogether, our study has highlighted the importance of microbial cooperation for the biodegradation of pollutants. Our metagenome-based investigation supports the current perception that consortia of fungi-bacteria are preferable to axenic cultures for effective bioremediation of the environment.}, }
@article {pmid39267241, year = {2024}, author = {Doni, L and Azzola, A and Oliveri, C and Bosi, E and Auguste, M and Morri, C and Bianchi, CN and Montefalcone, M and Vezzulli, L}, title = {Genome-resolved metagenomics revealed novel microbial taxa with ancient metabolism from macroscopic microbial mat structures inhabiting anoxic deep reefs of a Maldivian Blue Hole.}, journal = {Environmental microbiology reports}, volume = {16}, number = {5}, pages = {e13315}, pmid = {39267241}, issn = {1758-2229}, support = {CN_00000033//Centro Nazionale di Ricerca - Biodiversit&#xe0; (Italy) project (PNRR CN00000033 - Centro Nazionale Biodiversit&#xe0;/ ; CUP D33C22000960007//Italian Ministry of University and Research/ ; }, mesh = {*Metagenomics ; *Phylogeny ; *Metagenome ; Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Geologic Sediments/microbiology ; Genome, Bacterial/genetics ; Anaerobiosis ; Deltaproteobacteria/genetics/classification/isolation &amp; purification/metabolism ; Chloroflexi/genetics/classification/isolation &amp; purification/metabolism ; Proteobacteria/genetics/classification/isolation &amp; purification ; Microbiota ; }, abstract = {Blue holes are vertical water-filled openings in carbonate rock that exhibit complex morphology, ecology, and water chemistry. In this study, macroscopic microbial mat structures found in complete anoxic conditions in the Faanu Mudugau Blue Hole (Maldives) were studied by metagenomic methods. Such communities have likely been evolutionary isolated from the surrounding marine environment for more than 10,000 years since the Blue Hole formation during the last Ice Age. A total of 48 high-quality metagenome-assembled genomes (MAGs) were recovered, predominantly composed of the phyla Chloroflexota, Proteobacteria and Desulfobacterota. None of these MAGs have been classified to species level (<95% ANI), suggesting the discovery of several new microbial taxa. In particular, MAGs belonging to novel bacterial genera within the order Dehalococcoidales accounted for 20% of the macroscopic mat community. Genome-resolved metabolic analysis of this dominant microbial fraction revealed a mixotrophic lifestyle based on energy conservation via fermentation, hydrogen metabolism and anaerobic CO2 fixation through the Wood-Ljungdahl pathway. Interestingly, these bacteria showed a high proportion of ancestral genes in their genomes providing intriguing perspectives on mechanisms driving microbial evolution in this peculiar environment. Overall, our results provide new knowledge for understanding microbial life under extreme conditions in blue hole environments.}, }
@article {pmid39275913, year = {2024}, author = {Takada, K and Nakagawa, S and Kryukov, K and Ozawa, M and Watanabe, T}, title = {Metagenomic analysis of the gut microbiota of hooded cranes (Grus monacha) on the Izumi plain in Japan.}, journal = {FEBS open bio}, volume = {14}, number = {12}, pages = {1972-1984}, pmid = {39275913}, issn = {2211-5463}, support = {//Crane Conservation by the City of Izumi/ ; //Tokyo Biochemical Research Foundation/ ; JPMJCR20H6//Core Research for Evolutional Science and Technology/ ; //2020 Tokai University School of Medicine Research Aid/ ; 22gm1610010h0001//Japan Agency for Medical Research and Development/ ; JP223fa627002h//Japan Agency for Medical Research and Development/ ; //Takeda Science Foundation/ ; 16H06429//Japan Society for the Promotion of Science/ ; 16H06434//Japan Society for the Promotion of Science/ ; 16K21723//Japan Society for the Promotion of Science/ ; 19H04843//Japan Society for the Promotion of Science/ ; 19fk0108171//Japan Society for the Promotion of Science/ ; 21J01036//Japan Society for the Promotion of Science/ ; 22K15469//Japan Society for the Promotion of Science/ ; JP19fk0108113//Japan Society for the Promotion of Science/ ; JP22H02521//Japan Society for the Promotion of Science/ ; }, mesh = {Animals ; Japan ; *Gastrointestinal Microbiome/genetics ; *Birds/microbiology/virology ; *Metagenomics/methods ; Feces/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; Metagenome/genetics ; }, abstract = {Recent advances in DNA sequencing technology have dramatically improved our understanding of the gut microbiota of various animal species. However, research on the gut microbiota of birds lags behind that of many other vertebrates, and information about the gut microbiota of wild birds such as migratory waterfowl is particularly lacking. Because the ecology of migratory waterfowl (e.g., lifestyle, diet, physiological characteristics) differs from that of other birds, the gut microbiota of migratory waterfowl likely also differs, but much is still unknown. The hooded crane (Grus monacha) is an important representative migratory waterbird species and is listed as endangered on the International Union for Conservation of Nature and Natural Resources Red List of Threatened Species. In this study, we analyzed the bacterial and viral microbiota in the gut of hooded cranes by using deep sequencing data from fecal samples of hooded cranes that winter on the Izumi plain in Japan, and found that Cetobacterium, Clupeiformes, and Pbunavirus were clearly present in the fecal samples of hooded cranes. These findings advance our understanding of the ecology of hooded cranes.}, }
@article {pmid39275258, year = {2024}, author = {Wang, M and Chen, Y and Song, AX and Weng, X and Meng, Y and Lin, J and Mao, YH}, title = {The Combination of Exercise and Konjac Glucomannan More Effectively Prevents Antibiotics-Induced Dysbiosis in Mice Compared with Singular Intervention.}, journal = {Nutrients}, volume = {16}, number = {17}, pages = {}, pmid = {39275258}, issn = {2072-6643}, support = {2023A1515010004//Guangdong Basic and Applied Basic Research Foundation/ ; 2023ZDZX2035//Special Funds in Key Areas of Guangdong Provincial Department of Education/ ; S202410585045//The College Students Innovation and Entrepreneurship Training Program/ ; 202410585015//The College Students Innovation and Entrepreneurship Training Program/ ; 82003434//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Mannans/pharmacology ; *Dysbiosis/prevention &amp; control/chemically induced ; *Mice, Inbred C57BL ; *Anti-Bacterial Agents/pharmacology/adverse effects ; *Gastrointestinal Microbiome/drug effects ; *Physical Conditioning, Animal ; Mice ; Male ; Combined Modality Therapy ; }, abstract = {Our previous studies have demonstrated that konjac glucomannan (KGM) can prevent dysbiosis induced by antibiotics. While exercise may also impact the gut microbiome, there are limited studies reporting its protective effect on antibiotic-induced dysbiosis. Therefore, this study investigated the preventive and regulatory effects of a combination of 6-week exercise and KGM intervention on antibiotic-induced dysbiosis in C57BL/6J mice compared with a single intervention. The results showed that combined exercise and KGM intervention could restore the changes in the relative abundance of Bacteroides (3.73% with CTL versus 14.23% with ATBX versus 4.46% with EK) and Prevotellaceae_Prevotella (0.33% with CTL versus 0.00% with ATBX versus 0.30% with EK) induced by antibiotics (p < 0.05), and minimized the Bray-Curtis distance induced by antibiotics (0.55 with CTL versus 0.81 with ATBX versus 0.80 with EXC versus 0.83 with KGM versus 0.75 with EK). Compared with the combined intervention, exercise intervention also produced a certain level of recovery effects; the relative abundance of Rikenellaceae (1.96% with CTL versus 0.09% with ATBX versus 0.49% with EXC) was restored, while KGM supplementation showed the best preventive effect. In addition, the combination of exercise and KGM significantly enriched microbial purine metabolic pathways (p < 0.05). These findings indicate that combining exercise with KGM could be a promising approach to reducing the side effects of antibiotics on the gut microbiome.}, }
@article {pmid39273435, year = {2024}, author = {Di Chiano, M and Sallustio, F and Fiocco, D and Rocchetti, MT and Spano, G and Pontrelli, P and Moschetta, A and Gesualdo, L and Gadaleta, RM and Gallone, A}, title = {Psychobiotic Properties of Lactiplantibacillus plantarum in Neurodegenerative Diseases.}, journal = {International journal of molecular sciences}, volume = {25}, number = {17}, pages = {}, pmid = {39273435}, issn = {1422-0067}, support = {1062//PON "RICERCA E INNOVAZIONE" 2014-2020-Innovazione/ ; Call for tender No. 341 of 15 March 2022 of Italian Ministry of University and Research funded by the European Union - Next Generation EU//National Recovery and Resilience Plan (NRRP)/ ; Concession Decree No. 1550 of 11 October 2022 adopted by the Italian Ministry of University and Research, CUP D93C22000890001//Italian Ministry of University and Research, CUP D93C22000890001/ ; Codice progetto n. 2022H9MPZ5//MIUR- PRIN Progetti di Ricerca di Rilevante Interesse Nazionale 2022/ ; Id. 23239//AIRC IG 2019/ ; Call for tender No. 3138 of 16/12/2021 of Italian Ministry of University and Research funded by the European Union//National Recovery and Resilience Plan (NRRP)/ ; Project code: CN00000041, CUP H93C22000430007//NextGenerationEU/ ; PNRR-MR1-2022-12376395//European Union - Next Generation EU - PNRR M6C2/ ; "POFACS" - ARS01_00640 -", D.D. 1211/2020 and 1104/2021//Italian Ministry of University and Research (MIUR)/ ; PRA-HE 2021//University of Foggia/ ; }, mesh = {Humans ; *Neurodegenerative Diseases/microbiology/metabolism ; *Gastrointestinal Microbiome ; *Probiotics/therapeutic use ; Dysbiosis/microbiology ; Brain-Gut Axis ; Animals ; }, abstract = {Neurodegenerative disorders are the main cause of cognitive and physical disabilities, affect millions of people worldwide, and their incidence is on the rise. Emerging evidence pinpoints a disturbance of the communication of the gut-brain axis, and in particular to gut microbial dysbiosis, as one of the contributors to the pathogenesis of these diseases. In fact, dysbiosis has been associated with neuro-inflammatory processes, hyperactivation of the neuronal immune system, impaired cognitive functions, aging, depression, sleeping disorders, and anxiety. With the rapid advance in metagenomics, metabolomics, and big data analysis, together with a multidisciplinary approach, a new horizon has just emerged in the fields of translational neurodegenerative disease. In fact, recent studies focusing on taxonomic profiling and leaky gut in the pathogenesis of neurodegenerative disorders are not only shedding light on an overlooked field but are also creating opportunities for biomarker discovery and development of new therapeutic and adjuvant strategies to treat these disorders. Lactiplantibacillus plantarum (LBP) strains are emerging as promising psychobiotics for the treatment of these diseases. In fact, LBP strains are able to promote eubiosis, increase the enrichment of bacteria producing beneficial metabolites such as short-chain fatty acids, boost the production of neurotransmitters, and support the homeostasis of the gut-brain axis. In this review, we summarize the current knowledge on the role of the gut microbiota in the pathogenesis of neurodegenerative disorders with a particular focus on the benefits of LBP strains in Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, autism, anxiety, and depression.}, }
@article {pmid39273112, year = {2024}, author = {Druker, S and Sicsic, R and Ravid, S and Scheinin, S and Raz, T}, title = {Reproductive Tract Microbial Transitions from Late Gestation to Early Postpartum Using 16S rRNA Metagenetic Profiling in First-Pregnancy Heifers.}, journal = {International journal of molecular sciences}, volume = {25}, number = {17}, pages = {}, pmid = {39273112}, issn = {1422-0067}, mesh = {Female ; Animals ; Pregnancy ; *RNA, Ribosomal, 16S/genetics ; Cattle ; *Postpartum Period ; *Vagina/microbiology ; *Microbiota/genetics ; *Uterus/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics/methods ; Metagenome ; }, abstract = {Studies in recent years indicate that reproductive tract microbial communities are crucial for shaping mammals' health and reproductive outcomes. Following parturition, uterine bacterial contamination often occurs due to the open cervix, which may lead to postpartum uterine inflammatory diseases, especially in primiparous individuals. However, investigations into spatio-temporal microbial transitions in the reproductive tract of primigravid females remain limited. Our objective was to describe and compare the microbial community compositions in the vagina at late gestation and in the vagina and uterus at early postpartum in first-pregnancy heifers. Three swab samples were collected from 33 first-pregnancy Holstein Friesian heifers: one vaginal sample at gestation day 258 ± 4, and vaginal and uterine samples at postpartum day 7 ± 2. Each sample underwent 16S rRNA V4 region metagenetic analysis via Illumina MiSeq, with bioinformatics following Mothur MiSeq SOP. The reproductive tract bacterial communities were assigned to 1255 genus-level OTUs across 30 phyla. Dominant phyla, accounting for approximately 90% of the communities, included Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes, and Fusobacteria. However, the results revealed distinct shifts in microbial composition between the prepartum vagina (Vag-pre), postpartum vagina (Vag-post), and postpartum uterus (Utr-post). The Vag-pre and Utr-post microbial profiles were the most distinct. The Utr-post group had lower relative abundances of Proteobacteria but higher abundances of Bacteroidetes, Fusobacteria, and Tenericutes compared to Vag-pre, while Vag-post displayed intermediate values for these phyla, suggesting a transitional profile. Additionally, the Utr-post group exhibited lower bacterial richness and diversity compared to both Vag-pre and Vag-post. The unsupervised probabilistic Dirichlet Multinomial Mixtures model identified two distinct community types: most Vag-pre samples clustered into one type and Utr-post samples into another, while Vag-post samples were distributed evenly between the two. LEfSe analysis revealed distinct microbial profiles at the genus level. Overall, specific microbial markers were associated with anatomical and temporal transitions, revealing a dynamic microbial landscape during the first pregnancy and parturition. These differences highlight the complexity of these ecosystems and open new avenues for research in reproductive biology and microbial ecology.}, }
@article {pmid39271469, year = {2024}, author = {Ciuchcinski, K and Stokke, R and Steen, IH and Dziewit, L}, title = {Landscape of the metaplasmidome of deep-sea hydrothermal vents located at Arctic Mid-Ocean Ridges in the Norwegian-Greenland Sea: ecological insights from comparative analysis of plasmid identification tools.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {10}, pages = {}, pmid = {39271469}, issn = {1574-6941}, support = {UMO-2019/34/H/NZ2/00584//National Science Centre/ ; }, mesh = {*Plasmids/genetics ; *Hydrothermal Vents/microbiology ; Arctic Regions ; *Metagenomics ; Seawater/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Microbiota/genetics ; Norway ; Oceans and Seas ; Metagenome ; }, abstract = {Plasmids are one of the key drivers of microbial adaptation and evolution. However, their diversity and role in adaptation, especially in extreme environments, remains largely unexplored. In this study, we aimed to identify, characterize, and compare plasmid sequences originating from samples collected from deep-sea hydrothermal vents located in Arctic Mid-Ocean Ridges. To achieve this, we employed, and benchmarked three recently developed plasmid identification tools-PlasX, GeNomad, and PLASMe-on metagenomic data from this unique ecosystem. To date, this is the first direct comparison of these computational methods in the context of data from extreme environments. Upon recovery of plasmid contigs, we performed a multiapproach analysis, focusing on identifying taxonomic and functional biases within datasets originating from each tool. Next, we implemented a majority voting system to identify high-confidence plasmid contigs, enhancing the reliability of our findings. By analysing the consensus plasmid sequences, we gained insights into their diversity, ecological roles, and adaptive significance. Within the high-confidence sequences, we identified a high abundance of Pseudomonadota and Campylobacterota, as well as multiple toxin-antitoxin systems. Our findings ensure a deeper understanding of how plasmids contribute to shaping microbial communities living under extreme conditions of hydrothermal vents, potentially uncovering novel adaptive mechanisms.}, }
@article {pmid39271424, year = {2024}, author = {Bokulich, NA and Robeson, MS}, title = {Bioinformatics challenges for profiling the microbiome in cancer: pitfalls and opportunities.}, journal = {Trends in microbiology}, volume = {32}, number = {12}, pages = {1163-1166}, doi = {10.1016/j.tim.2024.08.011}, pmid = {39271424}, issn = {1878-4380}, mesh = {Humans ; *Neoplasms/microbiology ; *Microbiota ; *Computational Biology/methods ; *Metagenomics/methods ; *Machine Learning ; Sequence Analysis, DNA/methods ; }, abstract = {Increasing evidence suggests that the human microbiome plays an important role in cancer risk and treatment. Untargeted 'omics' techniques have accelerated research into microbiome-cancer interactions, supporting the discovery of novel associations and mechanisms. However, these techniques require careful selection and use to avoid biases and other pitfalls. In this essay, we discuss selected challenges involved in the analysis of microbiome data in the context of cancer, including the application of machine learning (ML). We focus on DNA sequencing-based (e.g., metagenomics) methods, but many of the pitfalls and opportunities generalize to other omics technologies as well. We advocate for extended training opportunities, community standards, and best practices for sharing data and code to advance transparency and reproducibility in cancer microbiome research.}, }
@article {pmid39270881, year = {2025}, author = {Bai, M and Zhou, Z and Yin, M and Wang, M and Gao, X and Zhao, J}, title = {The use of metagenomic and untargeted metabolomics in the analysis of the effects of the Lycium barbarum glycopeptide on allergic airway inflammation induced by Artemesia annua pollen.}, journal = {Journal of ethnopharmacology}, volume = {337}, number = {Pt 1}, pages = {118816}, doi = {10.1016/j.jep.2024.118816}, pmid = {39270881}, issn = {1872-7573}, mesh = {Animals ; *Pollen ; *Metabolomics ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Artemisia annua/chemistry ; Mice, Inbred BALB C ; Lycium/chemistry ; Anti-Inflammatory Agents/pharmacology ; Metagenomics/methods ; Disease Models, Animal ; Female ; Drugs, Chinese Herbal/pharmacology ; Respiratory Hypersensitivity/drug therapy ; Male ; Plant Extracts/pharmacology ; }, abstract = {The prevalence of allergic airway inflammation (AAI) worldwide is high. Artemisia annua L. pollen is spread worldwide, and allergic diseases caused by its plant polysaccharides, which are closely related to the intestinal microbiota, have anti-inflammatory effects. Further isolation and purification of Lycium barbarum L. yielded its most effective component Lycium barbarum L. glycopeptide (LbGP), which can inhibit inflammation in animal models. However, its therapeutic effect on AAI and its mechanism of regulating the intestinal flora have not been fully investigated.<br><br>AIM OF THE STUDY: To explore LbGP in APE-induced immunological mechanisms of AAI and the interaction mechanism of the intestinal flora and metabolites.<br><br>METHODS: A mouse model of AAI generated from Artemisia annua pollen was constructed, and immunological indices related to the disease were examined. A combination of macrogenomic and metabolomic analyses was used to investigate the effects of LbGP on the gut microbial and metabolite profiles of mice with airway inflammation.<br><br>RESULTS: LbGP effectively alleviated Artemisia. annua pollen extract (APE)-induced AAI, corrected Th1/Th2 immune dysregulation, decreased Th17&#xa0;cells, increased Treg cells, and altered the composition and function of the intestinal microbiota. LbGP treatment increased the number of OdoribacterandDuncaniella in the intestines of the mice, but the numble of Alistipes and Ruminococcus decreased. Metabolite pathway enrichment analysis were used to determine the effects of taurine and hypotaurine metabolism, bile acid secretion, and pyrimidine metabolism pathways on disease.<br><br>CONCLUSION: Our results revealed significant changes in the macrogenome and metabolome following APE and LbGP intervention, revealed potential correlations between gut microbial species and metabolites, and highlighted the beneficial effects of LbGP on AAI through the modulation of the gut microbiome and host metabolism.}, }
@article {pmid39269772, year = {2024}, author = {Rahal, Z and Liu, Y and Peng, F and Yang, S and Jamal, MA and Sharma, M and Moreno, H and Damania, AV and Wong, MC and Ross, MC and Sinjab, A and Zhou, T and Chen, M and Tarifa Reischle, I and Feng, J and Chukwuocha, C and Tang, E and Abaya, C and Lim, JK and Leung, CH and Lin, HY and Deboever, N and Lee, JJ and Sepesi, B and Gibbons, DL and Wargo, JA and Fujimoto, J and Wang, L and Petrosino, JF and Ajami, NJ and Jenq, RR and Moghaddam, SJ and Cascone, T and Hoffman, K and Kadara, H}, title = {Inflammation Mediated by Gut Microbiome Alterations Promotes Lung Cancer Development and an Immunosuppressed Tumor Microenvironment.}, journal = {Cancer immunology research}, volume = {12}, number = {12}, pages = {1736-1752}, pmid = {39269772}, issn = {2326-6074}, support = {P30 CA016672/CA/NCI NIH HHS/United States ; R01 CA205608/CA/NCI NIH HHS/United States ; P30 ES030285/ES/NIEHS NIH HHS/United States ; S10 OD024977/OD/NIH HHS/United States ; R01CA248731//National Cancer Institute (NCI)/ ; R01 CA248731/CA/NCI NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome/immunology ; *Tumor Microenvironment/immunology ; *Lung Neoplasms/immunology/microbiology/pathology ; Mice ; Humans ; *Inflammation/immunology ; Adenocarcinoma of Lung/immunology/microbiology/pathology ; Lipocalin-2/metabolism ; Mice, Inbred C57BL ; Disease Models, Animal ; Fecal Microbiota Transplantation ; Mice, Knockout ; }, abstract = {Accumulating evidence indicates that the gut microbiome influences cancer progression and therapy. We recently showed that progressive changes in gut microbial diversity and composition are closely coupled with tobacco-associated lung adenocarcinoma in a human-relevant mouse model. Furthermore, we demonstrated that the loss of the antimicrobial protein Lcn2 in these mice exacerbates protumor inflammatory phenotypes while further reducing microbial diversity. Yet, how gut microbiome alterations impinge on lung adenocarcinoma development remains poorly understood. In this study, we investigated the role of gut microbiome changes in lung adenocarcinoma development using fecal microbiota transfer and delineated a pathway by which gut microbiome alterations incurred by loss of Lcn2 fostered the proliferation of proinflammatory bacteria of the genus Alistipes, triggering gut inflammation. This inflammation propagated systemically, exerting immunosuppression within the tumor microenvironment, augmenting tumor growth through an IL6-dependent mechanism and dampening response to immunotherapy. Corroborating our preclinical findings, we found that patients with lung adenocarcinoma with a higher relative abundance of Alistipes species in the gut showed diminished response to neoadjuvant immunotherapy. These insights reveal the role of microbiome-induced inflammation in lung adenocarcinoma and present new potential targets for interception and therapy.}, }
@article {pmid39269181, year = {2024}, author = {Quan, Q and Liu, J and Li, C and Ke, Z and Tan, Y}, title = {Insights into prokaryotic communities and their potential functions in biogeochemical cycles in cold seep.}, journal = {mSphere}, volume = {9}, number = {10}, pages = {e0054924}, pmid = {39269181}, issn = {2379-5042}, mesh = {*Bacteria/classification/genetics/metabolism ; *Microbiota ; *Nitrogen/metabolism ; *Geologic Sediments/microbiology ; *Seawater/microbiology/chemistry ; *Sulfur/metabolism ; Phosphorus/metabolism/analysis ; Cold Temperature ; Metagenomics ; }, abstract = {UNLABELLED: Microorganisms are significant drivers of organic matter mineralization and are essential in marine biogeochemical cycles. However, the variations and influencing factors in prokaryotic communities from cold-seep sediments to the water column and the specific role of these microorganisms in biogeochemical cycles in the water column above cold seep remain unclear. Here, we investigated prokaryotic communities and their roles in nitrogen/sulfur cycling processes and conducted in situ dissolved organic matter (DOM) enrichment experiments to explore the effects of diverse sources of DOM on prokaryotic communities. Field investigations showed that the prokaryotic communities in the near-bottom water were more similar to those in the deep layer of the euphotic zone (44.60%) and at a depth of 400 m (50.89%) than those in the sediment (18.00%). DOM enrichment experiments revealed that adding dissolved organic nitrogen (DON) and phosphorus DOP caused a notable increase in the relative abundances of Rhodobacterales and Vibrionales, respectively. A remarkable increase was observed in the relative abundance of Alteromonadales and Pseudomonadales after the addition of dissolved organic sulfur (DOS). The metagenomic results revealed that Proteobacteria served as the keystone taxa in mediating the biogeochemical cycles of nitrogen, phosphorus, and sulfur in the Haima cold seep. This study highlights the responses of prokaryotes to DOM with different components and the microbially driven elemental cycles in cold seeps, providing a foundational reference for further studies on material energy metabolism and the coupled cycling of essential elements mediated by deep-sea microorganisms.<br><br>IMPORTANCE: Deep-sea cold seeps are among the most productive ecosystems, sustaining unique fauna and microbial communities through the release of methane and other hydrocarbons. Our study revealed that the influence of seepage fluid on the prokaryotic community in the water column is surprisingly limited, which challenges conventional views regarding the impact of seepage fluids. In addition, we identified that different DOM compositions play a crucial role in shaping the prokaryotic community composition, providing new insights into the factors driving microbial diversity in cold seeps. Furthermore, the study highlighted Proteobacteria as key and multifaceted drivers of biogeochemical cycles in cold seeps, emphasizing their significant contribution to complex interactions and processes. These findings offer a fresh perspective on the dynamics of cold-seep environments and their microbial communities, advancing our understanding of the biogeochemical functions in deep-sea environments.}, }
@article {pmid39268238, year = {2024}, author = {Wang, J and Su, C and Qian, M and Wang, X and Chen, C and Liu, Y and Liu, W and Xiang, Z and Xu, B}, title = {Subchronic toxic effects of bisphenol A on the gut-liver-hormone axis in rats via intestinal flora and metabolism.}, journal = {Frontiers in endocrinology}, volume = {15}, number = {}, pages = {1415216}, pmid = {39268238}, issn = {1664-2392}, mesh = {Animals ; *Phenols/toxicity ; Male ; Female ; Rats ; *Gastrointestinal Microbiome/drug effects ; *Benzhydryl Compounds/toxicity ; *Liver/drug effects/metabolism/pathology ; *Endocrine Disruptors/toxicity ; Rats, Sprague-Dawley ; Hormones/blood ; }, abstract = {BACKGROUND: Bisphenol A (BPA), a characteristic endocrine disruptor, is a substance that seriously interferes with the human endocrine system and causes reproductive disorders and developmental abnormalities. However, its toxic effects on the gut-liver-hormone axis are still unclear.<br><br>METHOD: Male and female rats were exposed to BPA (300 mg/kg) by oral gavage for 60 consecutive days. H&amp;E staining was used for histopathological evaluation, and the serum biochemical indexes were determined using an automatic analyzer. The 16S rRNA gene sequencing was used to detect the intestinal microbial diversity, and the GC-MS was used to analyze the contents of short-chain fatty acids (SCFAs) in colon contents. UPLC-QTOF MS was used to analyze the related metabolites. The ELISA method was used to assess the levels of serum inflammatory factors.<br><br>RESULTS: Histopathological analysis indicated that the liver, heart, and testis were affected by BPA. There was a significant effect on alanine aminotransferase (ALT), triglyceride (TG), total cholesterol (TC), and low-density lipoprotein (LDL) in the male-BPA group (P < 0.05), and globulin (GLB), indirect bilirubin (IBIL), alkaline phosphatase (ALP), ALT, TG, TC, high-density lipoprotein (HDL), and creatinine (Cr) in the female-BPA group (P < 0.05). Metagenomics (16S rRNA gene sequencing) analysis indicated that BPA reduced the diversity and changed the composition of gut microbiota in rats significantly. Compared with the control and blank groups, the contents of caproic acid, isobutyric acid, isovaleric acid, and propanoic acid in the colon contents decreased in the male-BPA group (P < 0.05), and caproic acid, isobutyric acid, isovaleric acid, and valeric acid in the colon contents decreased in the female-BPA group (P < 0.05). Metabolomic analysis of the serum indicated that BPA could regulate bile acid levels, especially ursodeoxycholic acid (UDCA) and its conjugated forms. The contents of amino acids, hormones, and lipids were also significantly affected after exposure to BPA. The increase in interleukin-6 (IL-6), interleukin-23 (IL-23), and transforming growth factor-&#x3b2; (TGF-&#x3b2;) in the serum of the male-BPA group suggests that BPA exposure affects the immune system.<br><br>CONCLUSION: BPA exposure will cause toxicity to rats via disrupting the gut-liver-hormone axis.}, }
@article {pmid39267171, year = {2024}, author = {Gandasegui, J and Fleitas, PE and Petrone, P and Grau-Pujol, B and Novela, V and Rubio, E and Muchisse, O and Cossa, A and Jamine, JC and Sacoor, C and Brienen, EAT and van Lieshout, L and Muñoz, J and Casals-Pascual, C}, title = {Baseline gut microbiota diversity and composition and albendazole efficacy in hookworm-infected individuals.}, journal = {Parasites &amp; vectors}, volume = {17}, number = {1}, pages = {387}, pmid = {39267171}, issn = {1756-3305}, mesh = {*Albendazole/therapeutic use/pharmacology/administration &amp; dosage ; Humans ; *Gastrointestinal Microbiome/drug effects/genetics ; *Anthelmintics/therapeutic use/administration &amp; dosage ; *Hookworm Infections/drug therapy ; *Feces/parasitology/microbiology ; Female ; Male ; RNA, Ribosomal, 16S/genetics ; Adult ; Treatment Outcome ; Animals ; Young Adult ; Middle Aged ; Ancylostomatoidea/drug effects/genetics ; Adolescent ; Child ; }, abstract = {Soil-transmitted helminth (STH) infections account for a significant global health burden, necessitating mass drug administration with benzimidazole-class anthelmintics, such as albendazole (ALB), for morbidity control. However, ALB efficacy shows substantial variability, presenting challenges for achieving consistent treatment outcomes. We have explored the potential impact of the baseline gut microbiota on ALB efficacy in hookworm-infected individuals through microbiota profiling and machine learning (ML) techniques. Our investigation included 89 stool samples collected from hookworm-infected individuals that were analyzed by microscopy and quantitative PCR (qPCR). Of these, 44 were negative by microscopy for STH infection using the Kato-Katz method and qPCR 21 days after treatment, which entails a cure rate of 49.4%. Microbiota characterization was based on amplicon sequencing of the V3-V4 16S ribosomal RNA gene region. Alpha and beta diversity analyses revealed no significant differences between participants who were cured and those who were not cured, suggesting that baseline microbiota diversity does not influence ALB treatment outcomes. Furthermore, differential abundance analysis at the phylum, family and genus levels yielded no statistically significant associations between bacterial communities and ALB efficacy. Utilizing supervised ML models failed to predict treatment response accurately. Our investigation did not provide conclusive insights into the relationship between gut microbiota and ALB efficacy. However, the results highlight the need for future research to incorporate longitudinal studies that monitor changes in the gut microbiota related to the infection and the cure with ALB, as well as functional metagenomics to better understand the interaction of the microbiome with the drug, and its role, if there is any, in modulating anthelmintic treatment outcomes in STH infections. Interdisciplinary approaches integrating microbiology, pharmacology, genetics and data science will be pivotal in advancing our understanding of STH infections and optimizing treatment strategies globally.}, }
@article {pmid39266528, year = {2024}, author = {Liu, S and Chen, Q and Hou, C and Dong, C and Qiu, X and Tang, K}, title = {Recovery of 1559 metagenome-assembled genomes from the East China Sea's low-oxygen region.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {994}, pmid = {39266528}, issn = {2052-4463}, mesh = {China ; *Metagenome ; *Archaea/genetics ; Bacteria/genetics/classification ; Oxygen ; Seawater/microbiology ; Phylogeny ; Metagenomics ; Oceans and Seas ; Microbiota ; }, abstract = {The Changjiang Estuary and adjacent East China Sea are well-known hypoxic aquatic environments. Eutrophication-driven hypoxia frequently occurs in coastal areas, posing a major threat to the ecological environment, including altering community structure and metabolic processes of marine organisms, and enhancing diversion of energy shunt into microbial communities. However, the responses of microbial communities and their metabolic pathways to coastal hypoxia remain poorly understood. Here, we studied the microbial communities collected from spatiotemporal samplings using metagenomic sequencing in the Changjiang Estuary and adjacent East China Sea. This generated 1.31 Tbp of metagenomics data, distributed across 103 samples corresponding to 8 vertical profiles. We further reported 1,559 metagenome-assembled genomes (MAGs), of which 508 were high-quality MAGs (Completeness > 90% and Contamination < 10%). Phylogenomic analysis classified them into 181 archaeal and 1,378 bacterial MAGs. These results provided a valuable metagenomic dataset available for further investigation of the effects of hypoxia on marine microorganisms.}, }
@article {pmid39266450, year = {2024}, author = {Gnimpieba, EZ and Hartman, TW and Do, T and Zylla, J and Aryal, S and Haas, SJ and Agany, DDM and Gurung, BDS and Doe, V and Yosufzai, Z and Pan, D and Campbell, R and Huber, VC and Sani, R and Gadhamshetty, V and Lushbough, C}, title = {Biofilm marker discovery with cloud-based dockerized metagenomics analysis of microbial communities.}, journal = {Briefings in bioinformatics}, volume = {25}, number = {Supplement_1}, pages = {}, pmid = {39266450}, issn = {1477-4054}, support = {#1849206//National Science Foundation/ ; //Institutional Development Award/ ; /GM/NIGMS NIH HHS/United States ; P20GM103443/NH/NIH HHS/United States ; }, mesh = {*Biofilms/growth &amp; development ; *Metagenomics/methods ; Microbiota/genetics ; Cloud Computing ; Humans ; Computational Biology/methods ; }, abstract = {In an environment, microbes often work in communities to achieve most of their essential functions, including the production of essential nutrients. Microbial biofilms are communities of microbes that attach to a nonliving or living surface by embedding themselves into a self-secreted matrix of extracellular polymeric substances. These communities work together to enhance their colonization of surfaces, produce essential nutrients, and achieve their essential functions for growth and survival. They often consist of diverse microbes including bacteria, viruses, and fungi. Biofilms play a critical role in influencing plant phenotypes and human microbial infections. Understanding how these biofilms impact plant health, human health, and the environment is important for analyzing genotype-phenotype-driven rule-of-life functions. Such fundamental knowledge can be used to precisely control the growth of biofilms on a given surface. Metagenomics is a powerful tool for analyzing biofilm genomes through function-based gene and protein sequence identification (functional metagenomics) and sequence-based function identification (sequence metagenomics). Metagenomic sequencing enables a comprehensive sampling of all genes in all organisms present within a biofilm sample. However, the complexity of biofilm metagenomic study warrants the increasing need to follow the Findability, Accessibility, Interoperability, and Reusable (FAIR) Guiding Principles for scientific data management. This will ensure that scientific findings can be more easily validated by the research community. This study proposes a dockerized, self-learning bioinformatics workflow to increase the community adoption of metagenomics toolkits in a metagenomics and meta-transcriptomics investigation. Our biofilm metagenomics workflow self-learning module includes integrated learning resources with an interactive dockerized workflow. This module will allow learners to analyze resources that are beneficial for aggregating knowledge about biofilm marker genes, proteins, and metabolic pathways as they define the composition of specific microbial communities. Cloud and dockerized technology can allow novice learners-even those with minimal knowledge in computer science-to use complicated bioinformatics tools. Our cloud-based, dockerized workflow splits biofilm microbiome metagenomics analyses into four easy-to-follow submodules. A variety of tools are built into each submodule. As students navigate these submodules, they learn about each tool used to accomplish the task. The downstream analysis is conducted using processed data obtained from online resources or raw data processed via Nextflow pipelines. This analysis takes place within Vertex AI's Jupyter notebook instance with R and Python kernels. Subsequently, results are stored and visualized in Google Cloud storage buckets, alleviating the computational burden on local resources. The result is a comprehensive tutorial that guides bioinformaticians of any skill level through the entire workflow. It enables them to comprehend and implement the necessary processes involved in this integrated workflow from start to finish. This manuscript describes the development of a resource module that is part of a learning platform named "NIGMS Sandbox for Cloud-based Learning" https://github.com/NIGMS/NIGMS-Sandbox. The overall genesis of the Sandbox is described in the editorial NIGMS Sandbox [1] at the beginning of this Supplement. This module delivers learning materials on the analysis of bulk and single-cell ATAC-seq data in an interactive format that uses appropriate cloud resources for data access and analyses.}, }
@article {pmid39265854, year = {2024}, author = {Viglioli, M and Rizzo, SM and Alessandri, G and Fontana, F and Milani, C and Turroni, F and Mancabelli, L and Croci, N and Rivara, S and Vacondio, F and Ventura, M and Mor, M}, title = {Investigating drug-gut microbiota interactions: reductive and hydrolytic metabolism of oral glucocorticoids by in vitro artificial gut microbiota.}, journal = {International journal of pharmaceutics}, volume = {665}, number = {}, pages = {124663}, doi = {10.1016/j.ijpharm.2024.124663}, pmid = {39265854}, issn = {1873-3476}, mesh = {*Gastrointestinal Microbiome/drug effects ; *Glucocorticoids/metabolism/administration &amp; dosage ; Humans ; *Feces/microbiology ; Hydrolysis ; Administration, Oral ; Prodrugs/metabolism ; Fermentation ; }, abstract = {Elucidation of the role of gut microbiota in the metabolism of orally administered drugs may improve therapeutic effectiveness and contribute to the development of personalized medicine. In this study, ten different artificial gut microbiota (AGM), obtained by culturing fecal samples in a continuous fermentation system, were challenged for their metabolizing capacity on a panel of six glucocorticoids selected from either prodrugs or drugs. Data from metabolic stability assays highlighted that, while the hydrolysis-mediated conversion of prodrugs to drugs represented only a minor metabolic pathway, significant differences in the stability of parent compounds and in their conversion rates to multiple reductive metabolites were obtained for the selected drugs. In the latter case, a taxonomic composition-dependent ability to convert parent drugs to metabolites was observed. Indeed, the artificial microbial communities dominated by the genus Bacteroides showed the maximal conversion of parent glucocorticoids to several metabolites. Furthermore, the effect of drugs on AGM was also evaluated through shallow shotgun sequencing and flow cytometry-based total bacterial cell count highlighting that these drugs can affect both the taxonomic composition and growth performances of the human gut microbiota.}, }
@article {pmid39265811, year = {2024}, author = {Nataraj, BH and Ranveer, SA and K, J and Nagpal, R and Behare, PV}, title = {Immune and microbiome modulatory effects of Limosilactobacillus fermentum NCDC 400 in an immunocompromised mouse model.}, journal = {Microbial pathogenesis}, volume = {196}, number = {}, pages = {106927}, doi = {10.1016/j.micpath.2024.106927}, pmid = {39265811}, issn = {1096-1208}, mesh = {Animals ; Mice ; *Probiotics/administration &amp; dosage ; *Limosilactobacillus fermentum ; *Immunocompromised Host ; *Disease Models, Animal ; *Cyclophosphamide ; *Gastrointestinal Microbiome/drug effects ; *Spleen/immunology ; Oxidative Stress ; Male ; Cell Differentiation ; }, abstract = {The present study was aimed to assess and validate the safety and functional efficacy of an indigenous probiotic strain Limosilactobacillus fermentum NCDC 400 (hereafter, LFN400) in an immunocompromised murine model. The study included four groups; a normal control (NC) group without immune suppression; an experimental model control (MC) with immune suppression induced via intraperitoneal cyclophosphamide (Cy) administration; and two MC groups orally administered with either low dose (LD) or high dose (HD) of LFN400 at dose 10[8] and 10[10] CFU/mouse/day, respectively, for 15-days. Both control groups received normal saline as placebo control. LFN400 improved specific experimental characteristics including hematological and serum biochemical markers. Compared to MC group, LFN400-fed groups showed markedly (P < 0.05) decreased arrays of detrimental caecal enzymes. We did not observe instances of bacterial translocation of LFN400 from gut to bloodstream or extra-intestinal organs. LFN400 intake significantly (P < 0.05) enhanced spleen cell differentiation, immune and oxidative stress markers, and restored Cy-induced histopathological changes in multiple tissues, including the spleen. There was no genotoxic effect of LFN400 on bone marrow cells. Although not statistically significant, LFN400 feeding moderately increased gut microbiome diversity, supporting the growth of beneficial saccharolytic microorganisms and reducing the presence of pathobionts. The findings demonstrate that the probiotic strain LFN400 possesses in vivo safety and immunomodulatory potency and thus should be considered a potential candidate for future human clinical studies.}, }
@article {pmid39265779, year = {2024}, author = {Xiao, X and Wu, Y and Jie, Z and Lin, L and Li, Y and Hu, W and Li, Y and Zhong, S}, title = {Akkermansia Muciniphila supplementation improves hyperlipidemia, cardiac function, and gut microbiota in high fat fed apolipoprotein E-deficient mice.}, journal = {Prostaglandins &amp; other lipid mediators}, volume = {175}, number = {}, pages = {106906}, doi = {10.1016/j.prostaglandins.2024.106906}, pmid = {39265779}, issn = {1098-8823}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Akkermansia ; Mice ; *Hyperlipidemias ; *Diet, High-Fat/adverse effects ; *Apolipoproteins E/deficiency/genetics ; Male ; Atherosclerosis ; Humans ; Mice, Inbred C57BL ; Dietary Supplements ; Mice, Knockout, ApoE ; Verrucomicrobia ; }, abstract = {Hyperlipidemia, obesity and gut dysbiosis are pivotal risk factors for atherosclerotic cardiovascular disease (ACVD). Supplementation of Akkermansia muciniphila (AKK) has also been proven to be effective in the prevention and treatment of obesity and other metabolic disorders. Here we found that AKK was more abundant in healthy control than ACVD patients via metagenomic sequencing on fecal samples. Subsequently, we investigated the role and underlying mechanism of AKK on obesity-associated atherosclerosis. AKK intervention partially reversed the exacerbation of atherosclerotic lesion formation in ApoE[-/-] mice by improving dyslipidemia. Interestingly, replenishment with AKK significantly enhanced cardiac function and reduced the body weight. It also reduced pro-inflammatory cytokine IL-6 and increased anti-inflammatory IL-10 in the circulation. Additionally, AKK colonization dramatically regulated gut microbiota and increased the abundance of Lactobacillaceae. Our findings have provided novel insights into the therapeutic potential of AKK as a beneficial microbe for treating atherosclerotic-associated cardiovascular diseases.}, }
@article {pmid39264803, year = {2024}, author = {Tang, D and Hu, W and Fu, B and Zhao, X and You, G and Xie, C and Wang, HY and Guo, X and Zhang, Q and Liu, Z and Ye, L}, title = {Gut microbiota-mediated C-sulfonate metabolism impairs the bioavailability and anti-cholestatic efficacy of andrographolide.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2387402}, pmid = {39264803}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Diterpenes/metabolism/pharmacology ; *Biological Availability ; Mice ; Cholestasis/metabolism/drug therapy/microbiology ; Male ; RNA, Ribosomal, 16S/genetics ; Bile Acids and Salts/metabolism ; Bacteria/metabolism/classification/genetics/drug effects/isolation &amp; purification ; Humans ; Mice, Inbred C57BL ; Liver/metabolism/drug effects ; Receptors, Cytoplasmic and Nuclear/metabolism/genetics ; Disease Models, Animal ; }, abstract = {Cholestatic liver injury results from the accumulation of toxic bile acids in the liver, presenting a therapeutic challenge with no effective treatment available to date. Andrographolide (AP) has exhibited potential as a treatment for cholestatic liver disease. However, its limited oral bioavailability poses a significant obstacle to harnessing its potent therapeutic properties and restricts its clinical utility. This limitation is potentially attributed to the involvement of gut microbiota in AP metabolism. In our study, employing pseudo-germ-free, germ-free and strain colonization animal models, along with 16S rRNA and shotgun metagenomic sequencing analysis, we elucidate the pivotal role played by gut microbiota in the C-sulfonate metabolism of AP, a process profoundly affecting its bioavailability and anti-cholestatic efficacy. Subsequent investigations pinpoint a specific enzyme, adenosine-5'-phosphosulfate (APS) reductase, predominantly produced by Desulfovibrio piger, which catalyzes the reduction of SO4[2-] to HSO3[-]. HSO3[-] subsequently interacts with AP, targeting its C=C unsaturated double bond, resulting in the formation of the C-sulfonate metabolite, 14-deoxy-12(R)-sulfo andrographolide (APM). Inhibition of APS reductase leads to a notable enhancement in AP bioavailability and anti-cholestatic efficacy. Furthermore, employing RNA sequencing analysis and farnesoid X receptor (FXR) knockout mice, our findings suggest that AP may exert its anti-cholestatic effects by activating the FXR pathway to promote bile acid efflux. In summary, our study unveils the significant involvement of gut microbiota in the C-sulfonate metabolism of AP and highlights the potential benefits of inhibiting APS reductase to enhance its therapeutic effects. These discoveries provide valuable insights into enhancing the clinical applicability of AP as a promising treatment for cholestatic liver injury.}, }
@article {pmid39264513, year = {2024}, author = {Angebault, C and Botterel, F}, title = {Metagenomics Applied to the Respiratory Mycobiome in Cystic Fibrosis.}, journal = {Mycopathologia}, volume = {189}, number = {5}, pages = {82}, pmid = {39264513}, issn = {1573-0832}, mesh = {*Cystic Fibrosis/microbiology/complications ; Humans ; *Mycobiome ; *Metagenomics/methods ; Fungi/genetics/classification/isolation &amp; purification ; Respiratory System/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Lung/microbiology ; Microbiota ; }, abstract = {Cystic fibrosis (CF) is a genetic disorder characterized by chronic microbial colonization and inflammation of the respiratory tract (RT), leading to pulmonary exacerbation (PEx) and lung damage. Although the lung bacterial microbiota has been extensively studied, the mycobiome remains understudied. However, its importance as a contributor to CF pathophysiology has been highlighted. The objective of this review is to provide an overview of the current state of knowledge regarding the mycobiome, as described through NGS-based studies, in patients with CF (pwCF).Several studies have demonstrated that the mycobiome in CF lungs is a dynamic entity, exhibiting a lower diversity and abundance than the bacterial microbiome. Nevertheless, the progression of lung damage is associated with a decrease in fungal and bacterial diversity. The core mycobiome of the RT in pwCFs is mainly composed of yeasts (Candida spp., Malassezia spp.) and molds with lower abundance. Some fungi (Aspergillus, Scedosporium/Pseudallescheria) have been demonstrated to play a role in PEx, while the involvement of others (Candida, Pneumocystis) remains uncertain. The "climax attack" ecological model has been proposed to explain the complexity and interplay of microbial populations in the RT, leading to PEx and lung damage. NGS-based studies also enable the detection of intra- and interkingdom correlations between fungi and bacteria. Further studies are required to ascertain the biological and pathophysiological relevance of these correlations. Finally, with the recent advent of CFTR modulators, our understanding of the pulmonary microbiome and mycobiome in pwCFs is about to change.}, }
@article {pmid39264053, year = {2024}, author = {Ho, L and Lai, C and Daim, LDJ and Noh, NM and Yap, Y and Ibrahim, J and Teh, C}, title = {Deciphering root-associated microbial communities in asymptomatic oil palm seedlings exposed to Ganoderma boninense: new insight into disease tolerance of oil palms.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {10}, pages = {}, pmid = {39264053}, issn = {1574-6941}, support = {//SD Guthrie Research Sdn Bhd/ ; }, mesh = {*Ganoderma/genetics ; *Seedlings/microbiology ; *Arecaceae/microbiology ; *Soil Microbiology ; *Plant Diseases/microbiology ; *Microbiota ; *Rhizosphere ; *Plant Roots/microbiology ; Ascomycota/genetics ; Disease Resistance ; Metagenomics ; }, abstract = {Understanding the microbial communities in asymptomatic oil palm seedlings is crucial for developing disease-suppressive microbiota against basal stem rot (BSR) in oil palm. In this study, we compared the microbial communities in bulk soil, rhizosphere, and endosphere of control, asymptomatic, and symptomatic seedlings following inoculation with Ganoderma boninense. Our findings revealed significant shifts in microbial structure and interactions, particularly in asymptomatic seedlings. Both Actinobacteriota and Ascomycota were notably enriched in these samples, with Actinobacteriota identified as keystone taxa. Long-read shotgun metagenomics demonstrated that 67.4% of enriched Actinobacteriota taxa were unique to asymptomatic seedlings. Similarly, Ascomycota members showed significant enrichment, suggesting their potential role in BSR suppression. The consistent identification of these phyla across various analyses underscores their importance in disease resistance. This is the first report detailing the shifts in prokaryotic and fungal communities in asymptomatic and symptomatic seedlings, offering insights into potential disease-suppressive taxa across three compartments: bulk soil, rhizosphere, and endosphere of oil palm seedlings.}, }
@article {pmid39260724, year = {2024}, author = {Ke, Y and Sun, W and Xue, Y and Yuan, Z and Zhu, Y and Chen, X and Yan, S and Li, Y and Xie, S}, title = {Pipe material and natural organic matter impact drinking water biofilm microbial community, pathogen profiles and antibiotic resistome deciphered by metagenomics assembly.}, journal = {Environmental research}, volume = {262}, number = {Pt 2}, pages = {119964}, doi = {10.1016/j.envres.2024.119964}, pmid = {39260724}, issn = {1096-0953}, mesh = {*Biofilms/drug effects ; *Drinking Water/microbiology ; *Metagenomics ; Microbiota/drug effects ; Drug Resistance, Microbial/genetics ; Water Supply ; Anti-Bacterial Agents/pharmacology ; Polyethylene ; Water Microbiology ; }, abstract = {Biofilms in drinking water distribution systems (DWDSs) are a determinant to drinking water biosafety. Yet, how and why pipe material and natural organic matter (NOM) affect biofilm microbial community, pathogen composition and antibiotic resistome remain unclear. We characterized the biofilms' activity, microbial community, antibiotic resistance genes (ARGs), mobile genetic elements (MGEs) and pathogenic ARG hosts in Centers for Disease Control and Prevention (CDC) reactors with different NOM dosages and pipe materials based on metagenomics assembly. Biofilms in cast iron (CI) pipes exhibited higher activity than those in polyethylene (PE) pipes. NOM addition significantly decreased biofilm activity in CI pipes but increased it in PE pipes. Pipe material exerted more profound effects on microbial community structure than NOM. Azospira was significantly enriched in CI pipes and Sphingopyxis was selected in PE pipes, while pathogen (Ralstonia pickettii) increased considerably in NOM-added reactors. Microbial community network in CI pipes showed more edges (CI 13520, PE 7841) and positive correlation proportions (CI 72.35%, PE 61.69%) than those in PE pipes. Stochastic processes drove assembly of both microbial community and antibiotic resistome in DWDS biofilms based on neutral community model. Bacitracin, fosmidomycin and multidrug ARGs were predominant in both PE and CI pipes. Both pipe materials and NOM regulated the biofilm antibiotic resistome. Plasmid was the major MGE co-existing with ARGs, facilitating ARG horizontal transfer. Pathogens (Achromobacter xylosoxidans and Ralstonia pickettii) carried multiple ARGs (qacEdelta1, OXA-22 and aadA) and MGEs (integrase, plasmid and transposase), which deserved more attention. Microbial community contributed more to ARG change than MGEs. Structure equation model (SEM) demonstrated that turbidity and ammonia affected ARGs by directly mediating Shannon diversity and MGEs. These findings might provide a technical guidance for controlling pathogens and ARGs from the point of pipe material and NOM in drinking water.}, }
@article {pmid39260494, year = {2024}, author = {Ejaz, MR and Badr, K and Hassan, ZU and Al-Thani, R and Jaoua, S}, title = {Metagenomic approaches and opportunities in arid soil research.}, journal = {The Science of the total environment}, volume = {953}, number = {}, pages = {176173}, doi = {10.1016/j.scitotenv.2024.176173}, pmid = {39260494}, issn = {1879-1026}, mesh = {*Soil Microbiology ; *Metagenomics ; *Soil/chemistry ; Desert Climate ; Microbiota ; }, abstract = {Arid soils present unique challenges and opportunities for studying microbial diversity and bioactive potential due to the extreme environmental conditions they bear. This review article investigates soil metagenomics as an emerging tool to explore complex microbial dynamics and unexplored bioactive potential in harsh environments. Utilizing advanced metagenomic techniques, diverse microbial populations that grow under extreme conditions such as high temperatures, salinity, high pH levels, and exposure to metals and radiation can be studied. The use of extremophiles to discover novel natural products and biocatalysts emphasizes the role of functional metagenomics in identifying enzymes and secondary metabolites for industrial and pharmaceutical purposes. Metagenomic sequencing uncovers a complex network of microbial diversity, offering significant potential for discovering new bioactive compounds. Functional metagenomics, connecting taxonomic diversity to genetic capabilities, provides a pathway to identify microbes' mechanisms to synthesize valuable secondary metabolites and other bioactive substances. Contrary to the common perception of desert soil as barren land, the metagenomic analysis reveals a rich diversity of life forms adept at extreme survival. It provides valuable findings into their resilience and potential applications in biotechnology. Moreover, the challenges associated with metagenomics in arid soils, such as low microbial biomass, high DNA degradation rates, and DNA extraction inhibitors and strategies to overcome these issues, outline the latest advancements in extraction methods, high-throughput sequencing, and bioinformatics. The importance of metagenomics for investigating diverse environments opens the way for future research to develop sustainable solutions in agriculture, industry, and medicine. Extensive studies are necessary to utilize the full potential of these powerful microbial communities. This research will significantly improve our understanding of microbial ecology and biotechnology in arid environments.}, }
@article {pmid39259188, year = {2024}, author = {Liu, C and Wang, Y and Zhou, Z and Wang, S and Wei, Z and Ravanbakhsh, M and Shen, Q and Xiong, W and Kowalchuk, GA and Jousset, A}, title = {Protist predation promotes antimicrobial resistance spread through antagonistic microbiome interactions.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39259188}, issn = {1751-7370}, support = {42090064//National Natural Science Foundation of China/ ; 2023YFD1901402//National Key Research and Development Program of China/ ; YDZX2023023//Fundamental Research Funds for the Central Universities/ ; }, mesh = {*Microbiota/drug effects ; *Soil Microbiology ; *Bacteria/drug effects/genetics/classification ; Metagenomics ; Anti-Bacterial Agents/pharmacology ; Drug Resistance, Microbial ; Microbial Interactions ; Drug Resistance, Bacterial ; Eukaryota/drug effects ; }, abstract = {Antibiotic resistance has grown into a major public health threat. In this study, we reveal predation by protists as an overlooked driver of antibiotic resistance dissemination in the soil microbiome. While previous studies have primarily focused on the distribution of antibiotic resistance genes, our work sheds light on the pivotal role of soil protists in shaping antibiotic resistance dynamics. Using a combination of metagenomics and controlled experiments in this study, we demonstrate that protists cause an increase in antibiotic resistance. We mechanistically link this increase to a fostering of antimicrobial activity in the microbiome. Protist predation gives a competitive edge to bacteria capable of producing antagonistic secondary metabolites, which secondary metabolites promote in turn antibiotic-resistant bacteria. This study provides insights into the complex interplay between protists and soil microbiomes in regulating antibiotic resistance dynamics. This study highlights the importance of top-down control on the spread of antibiotic resistance and directly connects it to cross-kingdom interactions within the microbiome. Managing protist communities may become an important tool to control outbreaks of antibiotic resistance in the environment.}, }
@article {pmid39257028, year = {2024}, author = {Jotta, VFM and García, GJY and Fonseca, PLC and de Mello Ferreira, A and Azevedo, V and Brenig, B and Góes-Neto, A and Badotti, F}, title = {Taxonomic and functional characterization of biofilms from a photovoltaic panel reveals high genetic and metabolic complexity of the communities.}, journal = {Journal of applied microbiology}, volume = {135}, number = {9}, pages = {}, doi = {10.1093/jambio/lxae231}, pmid = {39257028}, issn = {1365-2672}, support = {//Omics Sciences NETWORK/ ; //CEFET-MG/ ; }, mesh = {*Biofilms/growth &amp; development ; Brazil ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Metagenomics ; Ferric Compounds/metabolism ; Microbiota ; Minerals/metabolism ; Bioelectric Energy Sources/microbiology ; Iron Compounds ; }, abstract = {AIMS: Biofilms are complex microbial cell aggregates that attach to different surfaces in nature, industrial environments, or hospital settings. In photovoltaic panels (PVs), biofilms are related to significant energy conversion losses. In this study, our aim was to characterize the communities of microorganisms and the genes involved in biofilm formation.<br><br>METHODS AND RESULTS: In this study, biofilm samples collected from a PV system installed in southeastern Brazil were analyzed through shotgun metagenomics, and the microbial communities and genes involved in biofilm formation were investigated. A total of 2030 different genera were identified in the samples, many of which were classified as extremophiles or producers of exopolysaccharides. Bacteria prevailed in the samples (89%), mainly the genera Mucilaginibacter, Microbacterium, Pedobacter, Massilia, and Hymenobacter. The functional annotation revealed >12&#x2009;000 genes related to biofilm formation and stress response. Genes involved in the iron transport and synthesis of c-di-GMP and c-AMP second messengers were abundant in the samples. The pathways related to these components play a crucial role in biofilm formation and could be promising targets for preventing biofilm formation in the PV. In addition, Raman spectroscopy analysis indicated the presence of hematite, goethite, and ferrite, consistent with the mineralogical composition of the regional soil and metal-resistant bacteria.<br><br>CONCLUSIONS: Taken together, our findings reveal that PV biofilms are a promising source of microorganisms of industrial interest and genes of central importance in regulating biofilm formation and persistence.}, }
@article {pmid39256724, year = {2024}, author = {Gamage, BD and Ranasinghe, D and Sahankumari, A and Malavige, GN}, title = {Metagenomic analysis of colonic tissue and stool microbiome in patients with colorectal cancer in a South Asian population.}, journal = {BMC cancer}, volume = {24}, number = {1}, pages = {1124}, pmid = {39256724}, issn = {1471-2407}, support = {ASP/01/RE/MED/2018/52//University of Sri Jayewardenepura/ ; ASP/01/RE/MED/2018/52//University of Sri Jayewardenepura/ ; }, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Bacteria/classification/isolation &amp; purification ; Colon/microbiology ; *Colorectal Neoplasms/microbiology ; *Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; Metagenome ; Metagenomics/methods ; RNA, Ribosomal, 16S/genetics ; South Asian People ; }, abstract = {BACKGROUND: The gut microbiome is thought to play an important role in the development of colorectal cancer (CRC). However, as the gut microbiome varies widely based on diet, we sought to investigate the gut microbiome changes in patients with CRC in a South Asian population.<br><br>METHODS: The gut microbiome was assessed by 16s metagenomic sequencing targeting the V4 hypervariable region of the bacterial 16S rRNA in stool samples (n&#x2009;=&#x2009;112) and colonic tissue (n&#x2009;=&#x2009;36) in 112 individuals. The cohort comprised of individuals with CRC (n&#x2009;=&#x2009;24), premalignant lesions (n&#x2009;=&#x2009;10), healthy individuals (n&#x2009;=&#x2009;50) and in those with diabetes (n&#x2009;=&#x2009;28).<br><br>RESULTS: Overall, the relative abundances of genus Fusobacterium (p&#x2009;<&#x2009;0.001), Acinetobacter (p&#x2009;<&#x2009;0.001), Escherichia-Shigella (p&#x2009;<&#x2009;0.05) were significantly higher in gut tissue, while Romboutsia (p&#x2009;<&#x2009;0.01) and Prevotella (p&#x2009;<&#x2009;0.05) were significantly higher in stool samples. Bacteroides and Fusobacterium were the most abundant genera found in stool samples in patients with CRC. Patients with pre-malignant lesions had significantly high abundances of Christensenellaceae, Enterobacteriaceae, Mollicutes and Ruminococcaceae (p&#x2009;<&#x2009;0.001) compared to patients with CRC, and healthy individuals. Romboutsia was significantly more abundant (p&#x2009;<&#x2009;0.01) in stool samples in healthy individuals compared to those with CRC and diabetes.<br><br>CONCLUSION: Despite marked differences in the Sri Lankan diet compared to the typical Western diet, Bacteroides and Fusobacterium species were the most abundant in those with CRC, with Prevotella species, being most abundant in many individuals. We believe these results pave the way for possible dietary interventions for prevention of CRC in the South Asian population.}, }
@article {pmid39256682, year = {2024}, author = {Wu, LH and Hu, CX and Liu, TX}, title = {Metagenomic profiling of gut microbiota in Fall Armyworm (Spodoptera frugiperda) larvae fed on different host plants.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {337}, pmid = {39256682}, issn = {1471-2180}, mesh = {Animals ; *Spodoptera/microbiology/genetics ; *Larva/microbiology ; *Gastrointestinal Microbiome/genetics ; *Metagenomics ; *Zea mays/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; *Sorghum/microbiology ; Solanum lycopersicum/microbiology ; Capsicum/microbiology ; Metagenome ; }, abstract = {BACKGROUND: The fall armyworm (FAW, Spodoptera frugiperda) is a polyphagous pest known for causing significant crop damage. The gut microbiota plays a pivotal role in influencing the biology, physiology and adaptation of the host. However, understanding of the taxonomic composition and functional characteristics of the gut microbiota in FAW larvae fed on different host plants remains limited.<br><br>METHODS: This study utilized metagenomic sequencing to explore the structure, function and antibiotic resistance genes (ARGs) of the gut microbiota in FAW larvae transferred from an artificial diet to four distinct host plants: maize, sorghum, tomato and pepper.<br><br>RESULTS: The results demonstrated significant variations in gut microbiota structure among FAW larvae fed on different host plants. Firmicutes emerged as the dominant phylum, with Enterococcaceae as the dominant family and Enterococcus as the prominent genus. Notably, Enterococcus casseliflavus was frequently observed in the gut microbiota of FAW larvae across host plants. Metabolism pathways, particularly those related to carbohydrate and amino acid metabolism, played a crucial role in the adaptation of the FAW gut microbiota to different host plants. KEGG orthologs associated with the regulation of the peptide/nickel transport system permease protein in sorghum-fed larvae and the 6-phospho-&#x3b2;-glucosidase gene linked to glycolysis/gluconeogenesis as well as starch and sucrose metabolism in pepper-fed larvae were identified. Moreover, the study identified the top 20 ARGs in the gut microbiota of FAW larvae fed on different host plants, with the maize-fed group exhibiting the highest abundance of vanRC.<br><br>CONCLUSIONS: Our metagenomic sequencing study reveals significant variations in the gut microbiota composition and function of FAW larvae across diverse host plants. These findings underscore the intricate co-evolutionary relationship between hosts and their gut microbiota, suggesting that host transfer profoundly influences the gut microbiota and, consequently, the adaptability and pest management strategies for FAW.}, }
@article {pmid39256599, year = {2024}, author = {Chen, Y and Zhang, KX and Liu, H and Zhu, Y and Bu, QY and Song, SX and Li, YC and Zou, H and You, XY and Zhao, GP}, title = {Impact of ginsenoside Rb1 on gut microbiome and associated changes in pharmacokinetics in rats.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21168}, pmid = {39256599}, issn = {2045-2322}, support = {TSBICIP-CXRC-042//Tianjin Synthetic Biotechnology Innovation Capacity Improvement Projects/ ; TSBICIP-CXRC-008//Tianjin Synthetic Biotechnology Innovation Capacity Improvement Projects/ ; E2M9560201//Major Project of Haihe Laboratory of Synthetic Biology/ ; 31200035//National Natural Science Foundation of China/ ; XDC 0110300//Strategic Priority Research Program of the Chinese Academy of Sciences/ ; }, mesh = {*Ginsenosides/pharmacokinetics/pharmacology ; Animals ; *Gastrointestinal Microbiome/drug effects ; Rats ; Male ; *Bacteroides/drug effects ; Rats, Sprague-Dawley ; Glycoside Hydrolases/metabolism ; }, abstract = {Ginsenoside Rb1 exhibits a wide range of biological activities, and gut microbiota is considered the main metabolic site for Rb1. However, the impact of gut microbiota on the pharmacokinetics of Rb1 are still uncertain. In this study, we investigated the gut microbiome changes and the pharmacokinetics after a 30 d Rb1 intervention. Results reveal that the systemic exposure and metabolic clearance rate of Rb1 and Rd were substantially affected after orally supplementing Rb1 (60 mg/kg) to rats. Significant increase in the relative abundance of Bacteroides cellulosilyticus in gut microbiota and specific glycoside hydrolase (GH) families, such as GH2, GH92, and GH20 were observed based on microbiome and metagenomic analysis. Moreover, a robust association was identified between the pharmacokinetic parameters of Rb1 and the relative abundance of specific Bacteroides species, and glycoside hydrolase families. Our study demonstrates that Rb1 administration significantly affects the gut microbiome, revealing a complex relationship between B. cellulosilyticus, key GH families, and Rb1 pharmacokinetics.}, }
@article {pmid39256479, year = {2024}, author = {Campese, L and Russo, L and Abagnale, M and Alberti, A and Bachi, G and Balestra, C and Bellardini, D and Buondonno, A and Cardini, U and Carotenuto, Y and Checcucci, G and Chiusano, ML and D'Ambra, I and d'Ippolito, G and Di Capua, I and Donnarumma, V and Fontana, A and Furia, M and Galarza-Verkovitch, D and Gallia, R and Labadie, K and Leone, S and Licandro, P and Longo, A and Maselli, M and Merquiol, L and Murano, C and Oliveira, PH and Passarelli, A and Percopo, I and Perdereau, A and Piredda, R and Raffini, F and Roncalli, V and Ruscheweyh, HJ and Russo, E and Saggiomo, M and Santinelli, C and Sarno, D and Sunagawa, S and Tramontano, F and Trano, AC and Uttieri, M and Wincker, P and Zampicinini, G and Casotti, R and Conversano, F and D'Alelio, D and Iudicone, D and Margiotta, F and Montresor, M}, title = {The NEREA Augmented Observatory: an integrative approach to marine coastal ecology.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {989}, pmid = {39256479}, issn = {2052-4463}, mesh = {*Ecosystem ; Plankton ; Metagenome ; Biodiversity ; Metagenomics ; }, abstract = {The NEREA (Naples Ecological REsearch for Augmented observatories) initiative aims to establish an augmented observatory in the Gulf of Naples (GoN), designed to advance the understanding of marine ecosystems through a holistic approach. Inspired by the Tara Oceans expedition and building on the scientific legacy of the MareChiara Long-Term Ecological Research (LTER-MC) site, NEREA integrates traditional physical, chemical, and biological measurements with state-of-the-art methodologies such as metabarcoding and metagenomics. Here we present the first 10 months of NEREA data, collected from April 2019 to January 2020, encompassing physico-chemical parameters, plankton biodiversity (e.g., microscopy and flow cytometry), prokaryotic and eukaryotic metabarcoding, a prokaryotic gene catalogue, and a collection of 3818 prokaryotic Metagenome-Assembled Genomes (MAGs). NEREA's efforts produce a significant volume of multifaceted data, which enhances our understanding of marine ecosystems and promotes the development of scientific hypotheses and ideas.}, }
@article {pmid39256206, year = {2024}, author = {Ashade, AO and Obayori, OS and Salam, LB and Fashola, MO and Nwaokorie, FO}, title = {Effects of anthropogenic activities on the microbial community diversity of Ologe Lagoon sediment in Lagos State, Nigeria.}, journal = {Environmental monitoring and assessment}, volume = {196}, number = {10}, pages = {918}, pmid = {39256206}, issn = {1573-2959}, mesh = {Nigeria ; *Geologic Sediments/microbiology/chemistry ; *Environmental Monitoring ; *Microbiota ; *Water Pollutants, Chemical/analysis ; Metals, Heavy/analysis ; Anthropogenic Effects ; Bacteria/classification/genetics ; Hydrocarbons/analysis ; }, abstract = {The impact of pollution on the Ologe Lagoon was assessed by comparing physicochemical properties, hydrocarbon concentrations and microbial community structures of the sediments obtained from distinct sites of the lagoon. The locations were the human activity site (OLHAS), industrial-contaminated sites (OLICS) and relatively undisturbed site (OLPS). The physicochemical properties, heavy metal concentrations and hydrocarbon profiles were determined using standard methods. The microbial community structures of the sediments were determined using shotgun next-generation sequencing (NGS), taxonomic profiling was performed using centrifuge and statistical analysis was done using statistical analysis for metagenomics profile (STAMP) and Microsoft Excel. The result showed acidic pH across all sampling points, while the nitrogen content at OLPS was low (7.44 ± 0.085 mg/L) as compared with OLHAS (44.380 ± 0.962 mg/L) and OLICS (59.485 ± 0.827 mg/L). The levels of the cadmium, lead and nickel in the three sites were above the regulatory limits. The gas chromatography flame ionization detector (GC-FID) profile revealed hydrocarbon contaminations with nC14 tetradecane > alpha xylene > nC9 nonane > acenaphthylene more enriched at OLPS. Structurally, the sediments metagenomes consisted of 43 phyla,75 classes each, 165, 161, 166 orders, 986, 927 and 866 bacterial genera and 1476, 1129, 1327 species from OLHAS, OLICS and OLPS, respectively. The dominant phyla in the sediments were Proteobacteria, Firmicutes, Actinobacteria, and Chloroflexi. The principal component ordination (PCO) showed that OLPS microbial community had a total variance of 87.7% PCO1, setting it apart from OLHAS and OLICS. OLICS and OLHAS were separated by PCO2 accounting for 12.3% variation, and the most polluted site is the OLPS.}, }
@article {pmid39255397, year = {2024}, author = {Park, G and Kadyan, S and Hochuli, N and Salazar, G and Laitano, O and Chakrabarty, P and Efron, PA and Zafar, MA and Wilber, A and Nagpal, R}, title = {An Enteric Bacterial Infection Triggers Neuroinflammation and Neurobehavioral Impairment in 3xTg-AD Transgenic Mice.}, journal = {The Journal of infectious diseases}, volume = {230}, number = {Supplement_2}, pages = {S95-S108}, pmid = {39255397}, issn = {1537-6613}, support = {23A02//Florida Department of Health/ ; R01 AG070094/NH/NIH HHS/United States ; R01 AG070094/AG/NIA NIH HHS/United States ; //Foundation/ ; R21 AI166642/AI/NIAID NIH HHS/United States ; 440658//US Department of Agriculture/ ; R01 AI173244/AI/NIAID NIH HHS/United States ; //Infectious Diseases Society of America/ ; //Florida State University/ ; R01AI173244//US Public Health Service/ ; }, mesh = {Animals ; Mice ; *Mice, Transgenic ; *Klebsiella pneumoniae ; *Disease Models, Animal ; *Dysbiosis/microbiology/chemically induced ; *Alzheimer Disease/microbiology ; *Neuroinflammatory Diseases/microbiology ; *Gastrointestinal Microbiome/drug effects ; *Klebsiella Infections/microbiology ; *Blood-Brain Barrier/microbiology ; Brain/pathology/microbiology ; Anti-Bacterial Agents/pharmacology ; Brain-Gut Axis ; Male ; Humans ; }, abstract = {BACKGROUND: Klebsiella pneumoniae is infamous for hospital-acquired infections and sepsis, which have also been linked to Alzheimer disease (AD)-related neuroinflammatory and neurodegenerative impairment. However, its causative and mechanistic role in AD pathology remains unstudied.<br><br>METHODS: A preclinical model of K. pneumoniae enteric infection and colonization is developed in an AD model (3xTg-AD mice) to investigate whether and how K. pneumoniae pathogenesis exacerbates neuropathogenesis via the gut-blood-brain axis.<br><br>RESULTS: K. pneumoniae, particularly under antibiotic-induced dysbiosis, was able to translocate from the gut to the bloodstream by penetrating the gut epithelial barrier. Subsequently, K. pneumoniae infiltrated the brain by breaching the blood-brain barrier. Significant neuroinflammatory phenotype was observed in mice with K. pneumoniae brain infection. K. pneumoniae-infected mice also exhibited impaired neurobehavioral function and elevated total tau levels in the brain. Metagenomic analyses revealed an inverse correlation of K. pneumoniae with gut biome diversity and commensal bacteria, highlighting how antibiotic-induced dysbiosis triggers an enteroseptic "pathobiome" signature implicated in gut-brain perturbations.<br><br>CONCLUSIONS: The findings demonstrate how infectious agents following hospital-acquired infections and consequent antibiotic regimen may induce gut dysbiosis and pathobiome and increase the risk of sepsis, thereby increasing the predisposition to neuroinflammatory and neurobehavioral impairments via breaching the gut-blood-brain barrier.}, }
@article {pmid39254351, year = {2024}, author = {Wasmund, K and Singleton, C and Dahl Dueholm, MK and Wagner, M and Nielsen, PH}, title = {The predicted secreted proteome of activated sludge microorganisms indicates distinct nutrient niches.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0030124}, pmid = {39254351}, issn = {2379-5077}, mesh = {*Sewage/microbiology ; *Proteome/metabolism/analysis ; Bacterial Proteins/genetics/metabolism ; Nutrients/metabolism/analysis ; Bacteria/metabolism/genetics/classification ; Metagenome ; Microbiota/genetics ; }, abstract = {In wastewater treatment plants (WWTPs), complex microbial communities process diverse chemical compounds from sewage. Secreted proteins are critical because many are the first to interact with or degrade external (macro)molecules. To better understand microbial functions in WWTPs, we predicted secreted proteomes of WWTP microbiota from more than 1,000 high-quality metagenome-assembled genomes (MAGs) from 23 Danish WWTPs with biological nutrient removal. Focus was placed on examining secreted catabolic exoenzymes that target major classes of macromolecules. We demonstrate that Bacteroidota has a high potential to digest complex polysaccharides, but also proteins and nucleic acids. Poorly understood activated sludge members of Acidobacteriota and Gemmatimonadota also have high capacities for extracellular polysaccharide digestion. Secreted nucleases are encoded by 61% of MAGs indicating an importance for extracellular DNA and/or RNA digestion in WWTPs. Secreted lipases were the least common macromolecule-targeting enzymes predicted, encoded mainly by Gammaproteobacteria and Myxococcota. In contrast, diverse taxa encode extracellular peptidases, indicating that proteins are widely used nutrients. Diverse secreted multi-heme cytochromes suggest capabilities for extracellular electron transfer by various taxa, including some Bacteroidota that encode undescribed cytochromes with >100 heme-binding motifs. Myxococcota have exceptionally large secreted protein complements, probably related to predatory lifestyles and/or complex cell cycles. Many Gammaproteobacteria MAGs (mostly former Betaproteobacteria) encode few or no secreted hydrolases, but many periplasmic substrate-binding proteins and ABC- and TRAP-transporters, suggesting they are mostly sustained by small molecules. Together, this study provides a comprehensive overview of how WWTPs microorganisms interact with the environment, providing new insights into their functioning and niche partitioning.IMPORTANCEWastewater treatment plants (WWTPs) are critical biotechnological systems that clean wastewater, allowing the water to reenter the environment and limit eutrophication and pollution. They are also increasingly important for the recovery of resources. They function primarily by the activity of microorganisms, which act as a "living sponge," taking up and transforming nutrients, organic material, and pollutants. Despite much research, many microorganisms in WWTPs are uncultivated and poorly characterized, limiting our understanding of their functioning. Here, we analyzed a large collection of high-quality metagenome-assembled genomes from WWTPs for encoded secreted enzymes and proteins, with special emphasis on those used to degrade organic material. This analysis showed highly distinct secreted proteome profiles among different major phylogenetic groups of microorganisms, thereby providing new insights into how different groups function and co-exist in activated sludge. This knowledge will contribute to a better understanding of how to efficiently manage and exploit WWTP microbiomes.}, }
@article {pmid39254336, year = {2024}, author = {Jung, D and Park, S and Kurban, D and Dufour, S and Ronholm, J}, title = {The occurrence of Aerococcus urinaeequi and non-aureus staphylococci in raw milk negatively correlates with Escherichia coli clinical mastitis.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0036224}, pmid = {39254336}, issn = {2379-5077}, support = {Dairy Research Cluster 3//Dairy Farmers of Canada (DFC)/ ; }, mesh = {Animals ; Female ; *Milk/microbiology ; Cattle ; *Mastitis, Bovine/microbiology ; *Escherichia coli/isolation &amp; purification/genetics ; *Aerococcus/isolation &amp; purification/genetics ; *Escherichia coli Infections/microbiology/veterinary ; *Staphylococcus/isolation &amp; purification/genetics ; Microbiota/genetics ; RNA, Ribosomal, 16S/genetics ; }, abstract = {Escherichia coli is a common environmental pathogen associated with clinical mastitis (CM) in dairy cattle. There is an interest in optimizing the udder microbiome to increase the resistance of dairy cattle to E. coli CM; however, the details of which members of the healthy udder microbiome may play a role in antagonizing E. coli are unknown. In this study, we characterized the bacterial community composition in raw milk collected from quarters of lactating Holstein dairy cows that developed E. coli CM during lactation, including milk from both healthy and diseased quarters (n = 1,172). The milk microbiome from infected quarters was compared before, during, and after CM. A combination of 16S rRNA gene amplicon and metagenomic sequencing was used generate data sets with a high level of both depth and breadth. The microbial diversity present in raw milk significantly decreased in quarters experiencing E. coli CM, indicating that E. coli displaces other members of the microbiome. However, the diversity recovered very rapidly after infection. Two genera, Staphylococcus and Aerococcus, and the family Oscillospiraceae were significantly more abundant in healthy quarters with low inflammation. Species of these genera, Staphylococcus auricularis, Staphylococcus haemolyticus, and Aerocussus urinaeequi, were identified by metagenomics. Thus, these species are of interest for optimizing the microbiome to discourage E. coli colonization without triggering inflammation.IMPORTANCEIn this study, we show that E. coli outcompetes and displaces several members of the udder microbiome during CM, but that microbial diversity recovers post-infection. In milk from quarters which remained healthy, the community composition was often highly dominated by S. auricularis, S. haemolyticus, A. urinaeequi, and S. marcescens without increases in somatic cell count (SCC). Community dominance by these organisms, without inflammation, could indicate that these species might have potential as prophylactic probiotics which could contribute to colonization resistance and prevent future instances of E. coli CM.}, }
@article {pmid39254265, year = {2024}, author = {Anandakumar, H and Rauch, A and Wimmer, MI and Yarritu, A and Koch, G and McParland, V and Bartolomaeus, H and Wilck, N}, title = {Segmental patterning of microbiota and immune cells in the murine intestinal tract.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2398126}, pmid = {39254265}, issn = {1949-0984}, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; *Mice, Inbred C57BL ; *Bacteria/classification/genetics/isolation &amp; purification/immunology ; Intestines/microbiology/immunology/cytology ; Metagenomics ; Germ-Free Life ; Female ; T-Lymphocyte Subsets/immunology ; Male ; Intestinal Mucosa/microbiology/immunology/cytology ; }, abstract = {The intestine exhibits distinct characteristics along its length, with a substantial immune cell reservoir and diverse microbiota crucial for maintaining health. This study investigates how anatomical location and regional microbiota influence intestinal immune cell abundance. Using conventionally colonized and germ-free mice, segment-specific immune cell composition and microbial communities were assessed. Metagenomic sequencing analyzed microbiome variations, while flow cytometry and immunofluorescence examined immune cell composition. Microbiome composition varied significantly along the intestine, with diversity and abundance increasing from upper to lower segments. Immune cells showed distinct segment-specific patterning influenced by microbial colonization and localization. T cell subsets displayed varied dependence on microbiome presence and anatomical location. This study highlights locoregional differences in intestinal immune cell and microbiome composition, identifying immune subsets susceptible to microbiota presence. The findings provide context for understanding immune cell alterations in disease models.}, }
@article {pmid39254049, year = {2024}, author = {Harris, RM and Pace, F and Kuntz, TM and Morgan, XC and Hyland, P and Summers, K and McDermott, E and Blumen, K and Watnick, PI}, title = {Testosterone treatment impacts the intestinal microbiome of transgender individuals.}, journal = {mSphere}, volume = {9}, number = {10}, pages = {e0055724}, pmid = {39254049}, issn = {2379-5042}, mesh = {Humans ; *Gastrointestinal Microbiome/drug effects ; *Testosterone ; Male ; *Transgender Persons ; Female ; Pilot Projects ; *Feces/microbiology ; Adult ; Metagenomics ; Middle Aged ; Glutamic Acid/metabolism ; Bacteria/classification/genetics/drug effects/metabolism/isolation &amp; purification ; }, abstract = {Medical modulation of sex hormone levels is a cornerstone of treatment for many conditions that impact well-being, including cancer, fertility/infertility, gender dysphoria, and chronic metabolic diseases such as diabetes and obesity. The microbial residents of the intestine, known as the microbiota, interact with sex hormones in the intestine, and there is correlative evidence that this interaction is bidirectional. Based on these published findings, we hypothesized that transgender individuals receiving exogenous testosterone as part of their gender-affirming medical treatment might undergo changes in their intestinal microbiome. To test this, we collected 26 stool samples from nine individuals before and up to 8 months after initiation of treatment with exogenous testosterone and subjected these samples to metagenomic analysis. While no species were significantly associated with the duration of testosterone therapy, pathways that generate glutamate increased in abundance, while those that consume glutamate decreased. Glutamate is a precursor of arginine, and testosterone is known to increase levels of arginine and its metabolites in the plasma. We hypothesize that testosterone increases the uptake of glutamate by enterocytes, thus decreasing access of the microbiota to this amino acid. While this pilot study establishes the impact of testosterone therapy on the intestinal microbiome, a more comprehensive study is necessary to establish the impact of testosterone-driven metagenomic shifts on the stool metatranscriptome, the stool metabolome, and the plasma metabolome.IMPORTANCEThe human intestine is inhabited by a large community of microbes known as the microbiome. Members of the microbiome consume the diet along with their human host. Thus, the metabolomes of the host and microbe are intricately linked. Testosterone alters the plasma metabolome. In particular, plasma levels of arginine and its metabolites and testosterone are positively correlated. To investigate the impact of exogenous testosterone on the microbiome, we analyzed the stool metagenomes of transgender individuals before and after the initiation of testosterone treatment. In this pilot project, we found a modest impact on the microbiome community structure but an increase in the abundance of metabolic pathways that generate glutamate and spare glutamate consumption. We propose that the host uses glutamate to generate arginine, decreasing the amount available for the microbiome.}, }
@article {pmid39253815, year = {2024}, author = {Wimmer, MI and Bartolomaeus, H and Anandakumar, H and Chen, CY and Vecera, V and Kedziora, S and Kamboj, S and Schumacher, F and Pals, S and Rauch, A and Meisel, J and Potapenko, O and Yarritu, A and Bartolomaeus, TUP and Samaan, M and Thiele, A and Stürzbecher, L and Geisberger, SY and Kleuser, B and Oefner, PJ and Haase, N and Löber, U and Gronwald, W and Forslund-Startceva, SK and Müller, DN and Wilck, N}, title = {Metformin modulates microbiota and improves blood pressure and cardiac remodeling in a rat model of hypertension.}, journal = {Acta physiologica (Oxford, England)}, volume = {240}, number = {11}, pages = {e14226}, doi = {10.1111/apha.14226}, pmid = {39253815}, issn = {1748-1716}, support = {//Deutsche Forschungsgemeinschaft/ ; //Deutsches Zentrum f&#xfc;r Herz-Kreislaufforschung/ ; }, mesh = {Animals ; *Metformin/pharmacology ; *Hypertension/drug therapy/metabolism ; Male ; *Gastrointestinal Microbiome/drug effects ; *Blood Pressure/drug effects ; *Ventricular Remodeling/drug effects ; Rats ; *Rats, Transgenic ; Disease Models, Animal ; Hypoglycemic Agents/pharmacology ; Fatty Acids, Volatile/metabolism ; }, abstract = {AIMS: Metformin has been attributed to cardiovascular protection even in the absence of diabetes. Recent observations suggest that metformin influences the gut microbiome. We aimed to investigate the influence of metformin on the gut microbiota and hypertensive target organ damage in hypertensive rats.<br><br>METHODS: Male double transgenic rats overexpressing the human renin and angiotensinogen genes (dTGR), a model of angiotensin II-dependent hypertension, were treated with metformin (300&#x2009;mg/kg/day) or vehicle from 4 to 7&#x2009;weeks of age. We assessed gut microbiome composition and function using shotgun metagenomic sequencing and measured blood pressure via radiotelemetry. Cardiac and renal organ damage and inflammation were evaluated by echocardiography, histology, and flow cytometry.<br><br>RESULTS: Metformin treatment increased the production of short-chain fatty acids (SCFA) acetate and propionate in feces without altering microbial composition and diversity. It significantly reduced systolic and diastolic blood pressure and improved cardiac function, as measured by end-diastolic volume, E/A, and stroke volume despite increased cardiac hypertrophy. Metformin reduced cardiac inflammation by lowering macrophage infiltration and shifting macrophage subpopulations towards a less inflammatory phenotype. The observed improvements in blood pressure, cardiac function, and inflammation correlated with fecal SCFA levels in dTGR. In&#xa0;vitro, acetate and propionate altered M1-like gene expression in macrophages, reinforcing anti-inflammatory effects. Metformin did not affect hypertensive renal damage or microvascular structure.<br><br>CONCLUSION: Metformin modulated the gut microbiome, increased SCFA production, and ameliorated blood pressure and cardiac remodeling in dTGR. Our findings confirm the protective effects of metformin in the absence of diabetes, highlighting SCFA as a potential mediators.}, }
@article {pmid39253787, year = {2024}, author = {Cheng, S and Gong, X and Xue, W and Kardol, P and Delgado-Baquerizo, M and Ling, N and Chen, X and Liu, M}, title = {Evolutionarily conserved core microbiota as an extended trait in nitrogen acquisition strategy of herbaceous species.}, journal = {The New phytologist}, volume = {244}, number = {4}, pages = {1570-1584}, doi = {10.1111/nph.20118}, pmid = {39253787}, issn = {1469-8137}, support = {42077047//National Foundation of Sciences in China/ ; lzujbky-2022-ct04//Fundamental Research Funds for the Central University of China/ ; 2021YFD1700202//National Key R&amp;D program/ ; }, mesh = {*Nitrogen/metabolism ; *Rhizosphere ; *Microbiota ; *Phylogeny ; Biological Evolution ; Plants/microbiology/metabolism ; Soil Microbiology ; Species Specificity ; Quantitative Trait, Heritable ; }, abstract = {Microbiota have co-evolved with plants over millions of years and are intimately linked to plants, ranging from symbiosis to pathogenesis. However, our understanding of the existence of a shared core microbiota across phylogenetically diverse plants remains limited. A common garden field experiment was conducted to investigate the rhizosphere microbial communities of phylogenetically contrasting herbaceous families. Through a combination of metagenomic sequencing, analysis of plant economic traits, and soil biochemical properties, we aimed to elucidate the eco-evolutionary role of the core rhizosphere microbiota in light of plant economic strategies. We identified a conserved core microbiota consisting of 278 taxa that was closely associated with the phylogeny of the plants studied. This core microbiota actively participated in multiple nitrogen metabolic processes and showed a strong correlation with the functional potential of rhizosphere nitrogen cycling, thereby serving as an extended trait in the plant nitrogen acquisition. Furthermore, our examination of simulated species loss revealed the crucial role of the core microbiota in maintaining the rhizosphere community's network stability. Our study highlighted that the core microbiota, which exhibited a phylogenetically conserved association with plants, potentially represented an extension of the plant phenotype and played an important role in nitrogen acquisition. These findings held implications for the utilization of microbiota-mediated plant functions.}, }
@article {pmid39252078, year = {2024}, author = {Vojvoda Zeljko, T and Kajan, K and Jalžić, B and Hu, A and Cukrov, N and Marguš, M and Cukrov, N and Marković, T and Sabatino, R and Di Cesare, A and Orlić, S}, title = {Genome-centric metagenomes unveiling the hidden resistome in an anchialine cave.}, journal = {Environmental microbiome}, volume = {19}, number = {1}, pages = {67}, pmid = {39252078}, issn = {2524-6372}, support = {KK.01.2.1.02.0335//European Union through the European Regional Development Fund/ ; KK.01.1.1.01.0003//European Union through the European Regional Development Fund/ ; KK.01.2.1.02.0335//European Union through the European Regional Development Fund/ ; CN_00000033//European Union - NextGenerationEU/ ; CN_00000033//European Union - NextGenerationEU/ ; }, abstract = {BACKGROUND: Antibiotic resistance is a critical global concern, posing significant challenges to human health and medical treatments. Studying antibiotic resistance genes (ARGs) is essential not only in clinical settings but also in diverse environmental contexts. However, ARGs in unique environments such as anchialine caves, which connect both fresh and marine water, remain largely unexplored despite their intriguing ecological characteristics.<br><br>RESULTS: We present the first study that comprehensively explores the occurrence and distribution of ARGs and mobile genetic elements (MGEs) within an anchialine cave. Utilizing metagenomic sequencing we uncovered a wide array of ARGs with the bacitracin resistance gene, bacA and multidrug resistance genes, being the most dominant. The cave's microbial community and associated resistome were significantly influenced by the salinity gradient. The discovery of novel &#x3b2;-lactamase variants revealed the cave's potential as a reservoir for previously undetected resistance genes. ARGs in the cave demonstrated horizontal transfer potential via plasmids, unveiling ecological implications.<br><br>CONCLUSIONS: These findings highlight the need for further exploration of the resistome in unique environments like anchialine caves. The interconnected dynamics of ARGs and MGEs within anchialine caves offer valuable insights into potential reservoirs and mechanisms of antibiotic resistance in natural ecosystems. This study not only advances our fundamental understanding but also highlights the need for a comprehensive approach to address antibiotic resistance in diverse ecological settings.}, }
@article {pmid39251745, year = {2024}, author = {Serwecińska, L and Font-Nájera, A and Strapagiel, D and Lach, J and Tołoczko, W and Bołdak, M and Urbaniak, M}, title = {Sewage sludge fertilization affects microbial community structure and its resistome in agricultural soils.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21034}, pmid = {39251745}, issn = {2045-2322}, support = {No. 2020/39/B/NZ9/01772//Narodowe Centrum Nauki/ ; No. 2020/39/B/NZ9/01772//Narodowe Centrum Nauki/ ; }, mesh = {*Sewage/microbiology ; *Soil Microbiology ; *Agriculture/methods ; *Fertilizers ; *Soil/chemistry ; *Microbiota/genetics/drug effects ; Bacteria/genetics/drug effects/classification ; Metagenomics/methods ; Drug Resistance, Microbial/genetics ; Poland ; }, abstract = {Global sewage sludge production is rapidly increasing, and its safe disposal is becoming an increasingly serious issue. One of the main methods of municipal sewage sludge management is based on its agricultural use. The wastewater and sewage sludge contain numerous antibiotic resistance genes (ARGs), and its microbiome differs significantly from the soil microbial community. The aim of the study was to assess the changes occurring in the soil microbial community and resistome after the addition of sewage sludge from municipal wastewater treatment plant (WWTP) in central Poland, from which the sludge is used for fertilizing agricultural soils on a regular basis. This study used a high-throughput shotgun metagenomics approach to compare the microbial communities and ARGs present in two soils fertilized with sewage sludge. The two soils represented different land uses and different physicochemical and granulometric properties. Both soils were characterized by a similar taxonomic composition of the bacterial community, despite dissimilarities between soils properties. Five phyla predominated, viz. Planctomycetes, Actinobacteria, Proteobacteria, Chloroflexi and Firmicutes, and they were present in comparable proportions in both soils. Network analysis revealed that the application of sewage sludge resulted in substantial qualitative and quantitative changes in bacterial taxonomic profile, with most abundant phyla being considerably depleted and replaced by Proteobacteria and Spirochaetes. In addition, the ratio of oligotrophic to copiotrophic bacteria substantially decreased in both amended soils. Furthermore, fertilized soils demonstrated greater diversity and richness of ARGs compared to control soils. The increased abundance concerned mainly genes of resistance to antibiotics most commonly used in human and animal medicine. The level of heavy metals in sewage sludge was low and did not exceed the standards permitted in Poland for sludge used in agriculture, and their level in fertilized soils was still inconsiderable.}, }
@article {pmid39251728, year = {2024}, author = {Cai, X and Dai, J and Xie, Y and Xu, S and Liu, M}, title = {Multi-omics study unravels gut microbiota and metabolites alteration in patients with Wilson's disease.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {21025}, pmid = {39251728}, issn = {2045-2322}, support = {JCYJ20220530165400002//Shenzhen Science and Technology Innovation Program/ ; 2021R01132//Shenzhen Guangming District Economic Development Special Fund/ ; }, mesh = {Humans ; *Hepatolenticular Degeneration/metabolism/microbiology/genetics ; *Gastrointestinal Microbiome ; Female ; Male ; Adult ; RNA, Ribosomal, 16S/genetics ; Metabolomics/methods ; Feces/microbiology ; Metabolome ; Young Adult ; Bacteria/classification/metabolism/genetics/isolation &amp; purification ; Metagenomics/methods ; Adolescent ; Multiomics ; }, abstract = {Hepatolenticular degeneration (HLD), also known as Wilson's disease (WD), is a rare autosomal recessive disorder regarding copper metabolism. Whether gut microbiota imbalance is involved in developing HLD remains unknown. A comprehensive 16S rRNA amplicon sequencing, metagenomic sequencing, and metabonomic analysis were undertaken in patients with WD to analyze the composition and function profiles of gut microbiota in patients with WD. The data demonstrated differences in gut microbiota and metabolic pathways between WD patients and normal individuals, significantly decreasing bacterial richness and diversity. The levels of Selenomonaceae and Megamonas in WD patients are significantly higher than those in healthy individuals. The relative abundances of Roseburia inulinivorans in patients with WD are lower than in healthy individuals. Compared with healthy people, the level of metabolites in patients with WD is abnormal. Leucylproline, 5-Phenylvaleric Acid and N-Desmethylclobazam, which have nutritional and protective effects, are significantly reduced fecal metabolites in patients with WD. D-Gluconic acid, which can chelate metal ions, may be a potential treatment for WD. The positive correlation it demonstrates with Alistipes indistinctus and Prevotella stercora indicates potential bacteria able to treat WD. These metabolites are mainly related to the biosynthesis of antibiotics, alpha-linolenic acid metabolism, one carbon pool by folate, nicotinate and nicotinamide metabolism. In conclusion, the data from this study elucidate novel mechanisms describing how abnormal gut miccrobiota contribute to the pathogenesis of WD and outlines new molecules for the treatment of WD.}, }
@article {pmid39250478, year = {2024}, author = {Pusa, T and Rousu, J}, title = {Stable biomarker discovery in multi-omics data via canonical correlation analysis.}, journal = {PloS one}, volume = {19}, number = {9}, pages = {e0309921}, pmid = {39250478}, issn = {1932-6203}, mesh = {Humans ; *Biomarkers/metabolism ; *Inflammatory Bowel Diseases/metabolism ; *Metabolomics/methods ; Metagenomics/methods ; Machine Learning ; Gastrointestinal Microbiome ; Multiomics ; }, abstract = {Multi-omics analysis offers a promising avenue to a better understanding of complex biological phenomena. In particular, untangling the pathophysiology of multifactorial health conditions such as the inflammatory bowel disease (IBD) could benefit from simultaneous consideration of several omics levels. However, taking full advantage of multi-omics data requires the adoption of suitable new tools. Multi-view learning, a machine learning technique that natively joins together heterogeneous data, is a natural source for such methods. Here we present a new approach to variable selection in unsupervised multi-view learning by applying stability selection to canonical correlation analysis (CCA). We apply our method, StabilityCCA, to simulated and real multi-omics data, and demonstrate its ability to find relevant variables and improve the stability of variable selection. In a case study on an IBD microbiome data set, we link together metagenomics and metabolomics, revealing a connection between their joint structure and the disease, and identifying potential biomarkers. Our results showcase the usefulness of multi-view learning in multi-omics analysis and demonstrate StabilityCCA as a powerful tool for biomarker discovery.}, }
@article {pmid39250184, year = {2024}, author = {Pallen, MJ}, title = {The dynamic history of prokaryotic phyla: discovery, diversity and division.}, journal = {International journal of systematic and evolutionary microbiology}, volume = {74}, number = {9}, pages = {}, pmid = {39250184}, issn = {1466-5034}, mesh = {Archaea/genetics/classification ; *Bacteria/genetics/classification ; Classification/methods ; History, 20th Century ; History, 21st Century ; *Phylogeny ; Prokaryotic Cells/classification ; History, 19th Century ; }, abstract = {Here, I review the dynamic history of prokaryotic phyla. Following leads set by Darwin, Haeckel and Woese, the concept of phylum has evolved from a group sharing common phenotypes to a set of organisms sharing a common ancestry, with modern taxonomy based on phylogenetic classifications drawn from macromolecular sequences. Phyla came as surprising latecomers to the formalities of prokaryotic nomenclature in 2021. Since then names have been validly published for 46 prokaryotic phyla, replacing some established names with neologisms, prompting criticism and debate within the scientific community. Molecular barcoding enabled phylogenetic analysis of microbial ecosystems without cultivation, leading to the identification of candidate divisions (or phyla) from diverse environments. The introduction of metagenome-assembled genomes marked a significant advance in identifying and classifying uncultured microbial phyla. The lumper-splitter dichotomy has led to disagreements, with experts cautioning against the pressure to create a profusion of new phyla and prominent databases adopting a conservative stance. The Candidatus designation has been widely used to provide provisional status to uncultured prokaryotic taxa, with phyla named under this convention now clearly surpassing those with validly published names. The Genome Taxonomy Database (GTDB) has offered a stable, standardized prokaryotic taxonomy with normalized taxonomic ranks, which has led to both lumping and splitting of pre-existing phyla. The GTDB framework introduced unwieldy alphanumeric placeholder labels, prompting recent publication of over 100 user-friendly Latinate names for unnamed prokaryotic phyla. Most candidate phyla remain 'known unknowns', with limited knowledge of their genomic diversity, ecological roles, or environments. Whether phyla still reflect significant evolutionary and ecological partitions across prokaryotic life remains an area of active debate. However, phyla remain of practical importance for microbiome analyses, particularly in clinical research. Despite potential diminishing returns in discovery of biodiversity, prokaryotic phyla offer extensive research opportunities for microbiologists for the foreseeable future.}, }
@article {pmid39248477, year = {2024}, author = {Hu, N-n and Wang, Z-q and Zhang, S-j and Wang, Z-z and Chen, X-x}, title = {Characterization of larval gut microbiota of two endoparasitoid wasps associated with their common host, Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae).}, journal = {Microbiology spectrum}, volume = {12}, number = {10}, pages = {e0120824}, pmid = {39248477}, issn = {2165-0497}, support = {2023YFD1400800//National Key R&amp;D Program of China/ ; U22A20485//MOST | National Natural Science Foundation of China (NSFC)/ ; 32272607//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; *Wasps/microbiology/physiology ; *Larva/microbiology/growth &amp; development ; *Moths/parasitology/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification ; Metagenomics ; Host-Parasite Interactions ; Phylogeny ; }, abstract = {Insect gut microbes play important roles in digestion, metabolism, development, and environmental adaptation. Parasitoid wasps are one of the most important biological control agents in pest control, while the gut microbial species compositions and the associated functions have been poorly investigated. Two endoparasitoid wasps, Cotesia vestalis and Diadromus collaris, parasitize the larval stage and pupal stage of the diamondback moth, Plutella xylostella, respectively. Using whole-genome shotgun metagenomic sequencing, we characterized the gut microbial composition, diversity, and potential functional roles associated with the two parasitoid wasp larvae. The results reveal that Proteobacteria and Firmicutes are the dominant phyla in the gut of C. vestalis and D. collaris larvae, with Rhizobium and Enterococcus being the dominant genera. The putative microbial functions associated with the two parasitoid wasps might play a virtual role in assisting in consuming the host's nutritional composition. The enriched CAZymes family genes are primarily involved in the degradation and synthesis of chitin. Despite the richness of microbial species and communities, the microbes species and the microbial community structure exhibit significant similarity between the two parasitoid wasps and between the parasitoid wasp and the host P. xylostella. Notably, the prevalence of the genus Enterococcus shared among them suggests a possible link of gut microbes between the host and their associated parasitoids. Our study offers insights into the gut microbe-based interactions between the host and parasitoid wasps for the first time, potentially paving the way for the development of an ecologically friendly biocontrol strategy against the pest P. xylostella.IMPORTANCEEndoparasitoid wasps spend the majority of their lifespan within their host and heavily rely on the host's nutrition for survival. There is limited understanding regarding the composition and physiological impacts of gut microbial communities in parasitoid wasps, particularly during the larval stage, which is directly linked to the host. Based on a thorough characterization of the gut microbe and comprehensive comparative analysis, we found the microbial species of the larval parasitoid wasp Cotesia vestalis and the pupal parasitoid wasp Diadromus collaris were similar, sharing 159 genera and 277 species, as were the microbial community structure. Certain of the dominant microbial strains of the two parasitoid wasps were similar to that of their host Plutella xylostella larvae, revealing host insect may affect the microbial community of the parasitoid wasps. The putative microbial functions associated with the parasitoid wasp larvae play an important role in dietary consumption.}, }
@article {pmid39248279, year = {2024}, author = {Ohuchi, H and Asano, R and Mori, A and Ishibashi, T and Motooka, D and Nakai, M and Nakaoka, Y}, title = {Gut Dysbiosis in Patients With Fontan Circulation.}, journal = {Journal of the American Heart Association}, volume = {13}, number = {18}, pages = {e034538}, pmid = {39248279}, issn = {2047-9980}, mesh = {Humans ; Male ; *Dysbiosis ; *Fontan Procedure/adverse effects ; Female ; *Gastrointestinal Microbiome/physiology ; Adolescent ; Child ; Heart Defects, Congenital/surgery ; Case-Control Studies ; Young Adult ; Feces/microbiology ; Hemodynamics ; Biomarkers/blood/metabolism ; Adult ; }, abstract = {BACKGROUND: The process underlying Fontan pathophysiology is multifactorial and may include gut dysbiosis (GD). We investigated the presence of GD and elucidated its correlation with Fontan pathophysiology.<br><br>METHODS AND RESULTS: Gut microbiomes of 155 consecutive patients with Fontan pathophysiology and 44 healthy individuals were analyzed using 16S rRNA sequencing of bacterial DNA extracted from fecal samples. GD was evaluated on the basis of &#x3b1; and &#xdf; diversities of the gut microbiome and was compared with natural log-transformed C-reactive protein, hemodynamics, von Willebrand factor antigen (a bacterial translocation marker), Mac-2 binding protein glycosylation isomer (a liver fibrosis indicator), peak oxygen uptake, and heart failure hospitalization. Patients with Fontan exhibited GD in terms of &#x3b1; and &#xdf; diversities as compared with controls (P<0.01). Reduced &#x3b1; diversity was associated with a failed hemodynamic phenotype, hypoxia, high natural log-transformed C-reactive protein levels, and elevated von Willebrand factor antigen and Mac-2 binding protein glycosylation isomer levels (P<0.05-0.01). In addition to elevated von Willebrand factor antigen and hypoxia, decreased &#x3b1; diversity was independently correlated with a high natural log-transformed C-reactive protein level (P<0.05), which was associated with liver imaging abnormalities and a heightened risk of heart failure hospitalization (P<0.01 for both).<br><br>CONCLUSIONS: Patients with Fontan pathophysiology exhibited GD compared with healthy individuals, and GD was linked to failed hemodynamics and systemic inflammation with a poor prognosis. Therefore, GD may play a pivotal role in a failing Fontan status, including Fontan-associated liver disease, through GD-associated systemic inflammation.}, }
@article {pmid39248272, year = {2024}, author = {Chen, X and He, Y and Zhou, L and Li, X and Jiang, M and Wu, M and Li, J and Chen, L and Xu, H and Gui, L and Zhou, Z}, title = {Microbial Heterogeneity Identification of Cerebral Thrombi Via Metagenomic Next-Generation Sequencing-Based Strategy.}, journal = {Journal of the American Heart Association}, volume = {13}, number = {18}, pages = {e033221}, pmid = {39248272}, issn = {2047-9980}, mesh = {Humans ; *High-Throughput Nucleotide Sequencing ; *Metagenomics/methods ; Female ; Male ; Middle Aged ; *Intracranial Thrombosis/microbiology/genetics ; Aged ; Ischemic Stroke/microbiology/genetics ; Bacteria/genetics/isolation &amp; purification ; Microbiota/genetics ; }, abstract = {BACKGROUND: Diagnosis of the cause of cerebral thrombi is vital for recurrence prevention but also challenging. The presence of the microbiome has recently been confirmed in thrombus, suggesting a novel approach to distinguish cerebral thrombi of different origins. However, little is known about whether there is heterogeneity in microbiological colonization of cerebral thrombi of different sources.<br><br>METHODS AND RESULTS: Forty patients experiencing acute ischemic stroke were included and clinical data were collected. Metagenomic next-generation sequencing was adopted to detect bacterial and genomic signatures of human cerebral thrombi samples. We found similar species diversity between the large-artery atherosclerosis thrombi and cardioembolic thrombi but different species composition and distribution of cerebral thrombus microbiota. Compared with the group with cardioembolism, the group with large-artery atherosclerosis showed a significantly higher relative abundance of Ralstonia insidiosa among the top 10 bacterial species in cerebral thrombi. Twenty operational taxonomy units were correlated with 11 clinical indicators of ischemic stroke. The Gene Ontology enrichment analysis revealed 9 different enriched biological processes (translation and carbohydrate metabolic process, etc). The enriched Kyoto Encyclopedia of Genes and Genomes pathways included ribosome, butanoate metabolism, and sulfur metabolism.<br><br>CONCLUSIONS: This study, based on the approach of metagenomic next-generation sequencing, provides a diagnostic microbiological method to discriminate individuals with cardioembolic thrombi from those with large-artery atherosclerosis thrombi with human cerebral thrombi samples. Our findings provide a fresh perspective on microbial heterogeneity of cerebral thrombi and demonstrate biological processes and pathway features of cerebral thrombi.}, }
@article {pmid39247916, year = {2024}, author = {Lyu, X and Xu, X and Shen, S and Qin, F}, title = {Genetics causal analysis of oral microbiome on type 2 diabetes in East Asian populations: a bidirectional two-sample Mendelian randomized study.}, journal = {Frontiers in endocrinology}, volume = {15}, number = {}, pages = {1452999}, pmid = {39247916}, issn = {1664-2392}, mesh = {Humans ; *Diabetes Mellitus, Type 2/microbiology/genetics ; East Asian People/genetics ; Genetic Predisposition to Disease ; *Genome-Wide Association Study ; *Mendelian Randomization Analysis ; *Microbiota/genetics ; Mouth/microbiology ; *Saliva/microbiology ; Tongue/microbiology ; }, abstract = {INTRODUCTION: The dysbiosis of the oral microbiome is associated with the progression of various systemic diseases, including diabetes. However, the precise causal relationships remain elusive. This study aims to investigate the potential causal associations between oral microbiome and type 2 diabetes (T2D) using Mendelian randomization (MR) analyses.<br><br>METHODS: We conducted bidirectional two-sample MR analyses to investigate the impact of oral microbiome from saliva and the tongue T2D. This analysis was based on metagenome-genome-wide association studies (mgGWAS) summary statistics of the oral microbiome and a large meta-analysis of GWAS of T2D in East Asian populations. Additionally, we utilized the T2D GWAS summary statistics from the Biobank Japan (BBJ) project for replication. The MR methods employed included Wald ratio, inverse variance weighting (IVW), weighted median, MR-Egger, contamination mixture (ConMix), and robust adjusted profile score (RAPS).<br><br>RESULTS: Our MR analyses revealed genetic associations between specific bacterial species in the oral microbiome of saliva and tongue with T2D in East Asian populations. The MR results indicated that nine genera were shared by both saliva and tongue. Among these, the genera Aggregatibacter, Pauljensenia, and Prevotella were identified as risk factors for T2D. Conversely, the genera Granulicatella and Haemophilus D were found to be protective elements against T2D. However, different species within the genera Catonella, Lachnoanaerobaculum, Streptococcus, and Saccharimonadaceae TM7x exhibited multifaceted influences; some species were positively correlated with the risk of developing T2D, while others were negatively correlated.<br><br>DISCUSSION: This study utilized genetic variation tools to confirm the causal effect of specific oral microbiomes on T2D in East Asian populations. These findings provide valuable insights for the treatment and early screening of T2D, potentially informing more targeted and effective therapeutic strategies.}, }
@article {pmid39246231, year = {2024}, author = {Du, Y and Zuo, W and Sun, F}, title = {Imputing Metagenomic Hi-C Contacts Facilitates the Integrative Contig Binning Through Constrained Random Walk with Restart.}, journal = {Journal of computational biology : a journal of computational molecular cell biology}, volume = {31}, number = {10}, pages = {1008-1021}, doi = {10.1089/cmb.2024.0663}, pmid = {39246231}, issn = {1557-8666}, mesh = {*Metagenomics/methods ; *Algorithms ; Animals ; *Metagenome ; *Gastrointestinal Microbiome/genetics ; Sheep ; Contig Mapping/methods ; Software ; }, abstract = {Metagenomic Hi-C (metaHi-C) has shown remarkable potential for retrieving high-quality metagenome-assembled genomes from complex microbial communities. Nevertheless, existing metaHi-C-based contig binning methods solely rely on Hi-C interactions between contigs, disregarding crucial biological information such as the presence of single-copy marker genes. To overcome this limitation, we introduce ImputeCC, an integrative contig binning tool optimized for metaHi-C datasets. ImputeCC integrates both Hi-C interactions and the discriminative power of single-copy marker genes to group marker-gene-containing contigs into preliminary bins. It also introduces a novel constrained random walk with restart algorithm to enhance Hi-C connectivity among contigs. Comprehensive assessments using both mock and real metaHi-C datasets from diverse environments demonstrate that ImputeCC consistently outperforms other Hi-C-based contig binning tools. A genus-level analysis of the sheep gut microbiota reconstructed by ImputeCC underlines its capability to recover key species from dominant genera and identify previously unknown genera.}, }
@article {pmid39245657, year = {2024}, author = {Lee, S and Meslier, V and Bidkhori, G and Garcia-Guevara, F and Etienne-Mesmin, L and Clasen, F and Park, J and Plaza Oñate, F and Cai, H and Le Chatelier, E and Pons, N and Pereira, M and Seifert, M and Boulund, F and Engstrand, L and Lee, D and Proctor, G and Mardinoglu, A and Blanquet-Diot, S and Moyes, D and Almeida, M and Ehrlich, SD and Uhlen, M and Shoaie, S}, title = {Transient colonizing microbes promote gut dysbiosis and functional impairment.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {80}, pmid = {39245657}, issn = {2055-5008}, support = {EP/S001301/1//RCUK | Engineering and Physical Sciences Research Council (EPSRC)/ ; BB/S016899/1//RCUK | Biotechnology and Biological Sciences Research Council (BBSRC)/ ; N/A//Science for Life Laboratory (SciLifeLab)/ ; }, mesh = {*Dysbiosis/microbiology ; *Gastrointestinal Microbiome ; Humans ; *Metagenomics/methods ; Sweden ; *Bacteria/classification/genetics/isolation &amp; purification ; *Feces/microbiology ; Longitudinal Studies ; Metagenome ; Adult ; Bioreactors/microbiology ; Fermentation ; }, abstract = {Species composition of the healthy adult gut microbiota tends to be stable over time. Destabilization of the gut microbiome under the influence of different factors is the main driver of the microbial dysbiosis and subsequent impacts on host physiology. Here, we used metagenomics data from a Swedish longitudinal cohort, to determine the stability of the gut microbiome and uncovered two distinct microbial species groups; persistent colonizing species (PCS) and transient colonizing species (TCS). We validated the continuation of this grouping, generating gut metagenomics data for additional time points from the same Swedish cohort. We evaluated the existence of PCS/TCS across different geographical regions and observed they are globally conserved features. To characterize PCS/TCS phenotypes, we performed bioreactor fermentation with faecal samples and metabolic modeling. Finally, using chronic disease gut metagenome and other multi-omics data, we identified roles of TCS in microbial dysbiosis and link with abnormal changes to host physiology.}, }
@article {pmid39245190, year = {2024}, author = {Huang, J and Liu, S and Li, P and Wei, L and Lin, G and Lin, J and Luo, Y and Liu, Y and Mao, Y and Ruan, H and Qin, B and Fan, P and Lu, T and Cai, W and Yi, H and Mou, X and Lu, Z and Zhao, W and Wu, A}, title = {Multi-omics analysis of gut-brain axis reveals novel microbial and neurotransmitter signatures in patients with arteriosclerotic cerebral small vessel disease.}, journal = {Pharmacological research}, volume = {208}, number = {}, pages = {107385}, doi = {10.1016/j.phrs.2024.107385}, pmid = {39245190}, issn = {1096-1186}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Cerebral Small Vessel Diseases/metabolism/microbiology ; Male ; *Brain-Gut Axis ; Female ; Aged ; Middle Aged ; *Neurotransmitter Agents/metabolism ; *Dysbiosis/microbiology ; Metabolomics ; Bacteria/metabolism/genetics ; Metabolome ; Multiomics ; }, abstract = {Arteriosclerotic cerebral small vessel disease (aCSVD) is a major cause of stroke and dementia. Although its underlying pathogenesis remains poorly understood, both inflammaging and gut microbiota dysbiosis have been hypothesized to play significant roles. This study investigated the role of gut microbiota in the pathogenesis of aCSVD through a comparative analysis of the gut microbiome and metabolome between CSVD patients and healthy controls. The results showed that patients with aCSVD exhibited a marked reduction in potentially beneficial bacterial species, such as Faecalibacterium prausnitzli and Roseburia intestinalis, alongside an increase in taxa from Bacteroides and Proteobacteria. Integrated metagenomic and metabolomic analyses revealed that alterations in microbial metabolic pathways, including LPS biosynthesis and phenylalanine-tyrosine metabolism, were associated with the status of aCSVD. Our findings indicated that microbial LPS biosynthesis and phenylalanine-tyrosine metabolism potentially influenced the symptoms and progression of aCSVD via pro-inflammatory effect and modulation of systemic neurotransmitters, respectively. These results imply that gut microbiota characteristics may serve as indicators for early detection of aCSVD and as potential gut-directed therapeutic intervention target.}, }
@article {pmid39244633, year = {2024}, author = {Li, F and Liu, J and Maldonado-Gómez, MX and Frese, SA and Gänzle, MG and Walter, J}, title = {Highly accurate and sensitive absolute quantification of bacterial strains in human fecal samples.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {168}, pmid = {39244633}, issn = {2049-2618}, mesh = {Humans ; *Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; *Limosilactobacillus reuteri/genetics/classification ; Reproducibility of Results ; DNA, Bacterial/genetics ; Real-Time Polymerase Chain Reaction/methods ; High-Throughput Nucleotide Sequencing/methods ; Limit of Detection ; Sensitivity and Specificity ; Bacteria/genetics/classification/isolation &amp; purification ; }, abstract = {BACKGROUND: Next-generation sequencing (NGS) approaches have revolutionized gut microbiome research and can provide strain-level resolution, but these techniques have limitations in that they are only semi-quantitative, suffer from high detection limits, and generate data that is compositional. The present study aimed to systematically compare quantitative PCR (qPCR) and droplet digital PCR (ddPCR) for the absolute quantification of Limosilactobacillus reuteri strains in human fecal samples and to develop an optimized protocol for the absolute quantification of bacterial strains in fecal samples.<br><br>RESULTS: Using strain-specific PCR primers for L. reuteri 17938, ddPCR showed slightly better reproducibility, but qPCR was almost as reproducible and showed comparable sensitivity (limit of detection [LOD] around 10[4] cells/g feces) and linearity (R[2]&#x2009;>&#x2009;0.98) when kit-based DNA isolation methods were used. qPCR further had a wider dynamic range and is cheaper and faster. Based on these findings, we conclude that qPCR has advantages over ddPCR for the absolute quantification of bacterial strains in fecal samples. We provide an optimized and easy-to-follow step-by-step protocol for the design of strain-specific qPCR assays, starting from primer design from genome sequences to the calibration of the PCR system. Validation of this protocol to design PCR assays for two L. reuteri strains, PB-W1 and DSM 20016[&#xa0;T], resulted in a highly accurate qPCR with a detection limit in spiked fecal samples of around 10[3] cells/g feces. Applying our strain-specific qPCR assays to fecal samples collected from human subjects who received live L. reuteri PB-W1 or DSM 20016[&#xa0;T] during a human trial demonstrated a highly accurate quantification and sensitive detection of these two strains, with a&#xa0;much lower LOD&#xa0;and a broader dynamic range compared to NGS approaches (16S rRNA gene sequencing and whole metagenome sequencing).<br><br>CONCLUSIONS: Based on our analyses, we consider qPCR with kit-based DNA extraction approaches the best approach to accurately quantify gut bacteria at the strain level in fecal samples. The provided step-by-step protocol will allow scientists to design highly sensitive strain-specific PCR systems for the accurate quantification of bacterial strains of not only L. reuteri but also other bacterial taxa in a broad range of applications and sample types. Video Abstract.}, }
@article {pmid39244624, year = {2024}, author = {Yang, X and Feng, K and Wang, S and Yuan, MM and Peng, X and He, Q and Wang, D and Shen, W and Zhao, B and Du, X and Wang, Y and Wang, L and Cao, D and Liu, W and Wang, J and Deng, Y}, title = {Unveiling the deterministic dynamics of microbial meta-metabolism: a multi-omics investigation of anaerobic biodegradation.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {166}, pmid = {39244624}, issn = {2049-2618}, support = {No. 2019YFC1905001//National Key Research and Development Program of China/ ; }, mesh = {Anaerobiosis ; *Biodegradation, Environmental ; *Bioreactors/microbiology ; *Metabolomics ; *Microbiota ; Bacteria/metabolism/genetics/classification ; Metagenomics ; Methane/metabolism ; Thermodynamics ; Multiomics ; }, abstract = {BACKGROUND: Microbial anaerobic metabolism is a key driver of biogeochemical cycles, influencing ecosystem function and health of both natural and engineered environments. However, the temporal dynamics of the intricate interactions between microorganisms and the organic metabolites are still poorly understood. Leveraging metagenomic and metabolomic approaches, we unveiled the principles governing microbial metabolism during a 96-day anaerobic bioreactor experiment.<br><br>RESULTS: During the turnover and assembly of metabolites, homogeneous selection was predominant, peaking at 84.05% on day 12. Consistent dynamic coordination between microbes and metabolites was observed regarding their composition and assembly processes. Our findings suggested that microbes drove deterministic metabolite turnover, leading to consistent molecular conversions across parallel reactors. Moreover, due to the more favorable thermodynamics of N-containing organic biotransformations, microbes preferentially carried out sequential degradations from N-containing to S-containing compounds. Similarly, the metabolic strategy of C18 lipid-like molecules could switch from synthesis to degradation due to nutrient exhaustion and thermodynamical disadvantage. This indicated that community biotransformation thermodynamics emerged as a key regulator of both catabolic and synthetic metabolisms, shaping metabolic strategy shifts at the community level. Furthermore, the co-occurrence network of microbes-metabolites was structured around microbial metabolic functions centered on methanogenesis, with CH4 as a network hub, connecting with 62.15% of total nodes as 1st and 2nd neighbors. Microbes aggregate molecules with different molecular traits and are modularized depending on their metabolic abilities. They established increasingly positive relationships with high-molecular-weight molecules, facilitating resource acquisition and energy utilization. This metabolic complementarity and substance exchange further underscored the cooperative nature of microbial interactions.<br><br>CONCLUSIONS: All results revealed three key rules governing microbial anaerobic degradation. These rules indicate that microbes adapt to environmental conditions according to their community-level metabolic trade-offs and synergistic metabolic functions, further driving the deterministic dynamics of molecular composition. This research offers valuable insights for enhancing the prediction and regulation of microbial activities and carbon flow in anaerobic environments. Video Abstract.}, }
@article {pmid39244357, year = {2024}, author = {Abo-Ismail, M and Sadek, MAA and Humagain, K and Banjara, N and Pokharel, S}, title = {Spatiotemporal distribution of environmental microbiota around animal farms adjacent to produce fields in central coast California.}, journal = {Food microbiology}, volume = {124}, number = {}, pages = {104598}, doi = {10.1016/j.fm.2024.104598}, pmid = {39244357}, issn = {1095-9998}, mesh = {Animals ; *Bacteria/classification/genetics/isolation &amp; purification ; *Microbiota ; *Seasons ; *Soil Microbiology ; *Farms ; California ; RNA, Ribosomal, 16S/genetics ; Phylogeny ; Water Microbiology ; Spatio-Temporal Analysis ; Metagenomics ; }, abstract = {This study aimed to identify different environmental microbiota in animal farms adjacent to produce fields and to understand their potential flow pattern. Soil and water samples were collected from 16 locations during the winter, spring, summer, and fall seasons. In addition, a high-resolution digital elevation model helped to create a stream network to understand the potential flow of the microbiome. Metagenomic analysis of the 16 S rRNA gene revealed that soil and water samples from the four seasons harbor diverse microbiome profiles. The phylogenetic relationship of operational taxonomic units (OTUs) is separated by a maximum of 0.6 Bray-Curtis distance. Similarly, the Principal Component Analysis (P = 0.001) demonstrated the soil and water microbiome clustering across different locations and seasons. The relative abundance of Proteobacteria, Bacteroidetes, and Firmicutes was higher in the water samples than in the soil samples. In contrast, the relative abundance of Actinobacteria and Chloroflexi was higher in the soil compared to the water samples. Soil samples in summer and water samples in spring had the highest abundance of Bacteroidetes and Firmicutes, respectively. A unique microbial community structure was found in water samples, with an increased abundance of Hydrogenophaga and Solirubrobacter. Genera that were significantly abundant at a 1% false discovery rate (FDR) among seasons and soil or water samples, include Nocardioides, Gemmatimonas, JG30-KF-CM45, Massilia, Gaiellales, Sphingomonas, KD4-96, Bacillus, Streptomyces, Gaiella, and Gemmatimonadaceae. The relative abundance of pathogenic genera, including Mycobacterium, Bacteroides, Nocardia, Clostridium, and Corynebacterium, were significantly (at 1% FDR) affected by seasons and environmental type. The elevation-based stream network model suggests the potential flow of microbiomes from the animal farm to the produce fields.}, }
@article {pmid39244165, year = {2024}, author = {Choi, MH and Kim, D and Lee, KH and Kim, HJ and Sul, WJ and Jeong, SH}, title = {Dysbiosis of the gut microbiota is associated with in-hospital mortality in patients with antibiotic-associated diarrhoea: A metagenomic analysis.}, journal = {International journal of antimicrobial agents}, volume = {64}, number = {5}, pages = {107330}, doi = {10.1016/j.ijantimicag.2024.107330}, pmid = {39244165}, issn = {1872-7913}, mesh = {Humans ; *Diarrhea/microbiology/mortality ; Male ; *Gastrointestinal Microbiome/drug effects/genetics ; Female ; *Anti-Bacterial Agents/adverse effects/therapeutic use ; *Dysbiosis/microbiology ; Aged ; Middle Aged ; *Metagenomics ; *Hospital Mortality ; *Feces/microbiology ; *Clostridium Infections/mortality/microbiology ; Clostridioides difficile/genetics/isolation &amp; purification/drug effects ; Aged, 80 and over ; Adult ; Machine Learning ; }, abstract = {BACKGROUND: The increasing incidence of antibiotic-associated diarrhoea (AAD) is a serious health care problem. Dysbiosis of the gut microbiota is suspected to play a role in the pathogenesis of AAD, but its impact on the clinical outcomes of patients remains unclear.<br><br>METHODS: Between May and October 2022, 210 patients with AAD admitted to a university hospital and 100 healthy controls were recruited. DNA extraction from stool specimens and shotgun sequencing were performed. Machine learning was conducted to assess profiling at different taxonomic levels and to select variables for multivariable analyses.<br><br>RESULTS: Patients were classified into two groups: Clostridioides difficile infection (CDI, n = 39) and non-CDI AAD (n = 171). The in-hospital mortality rate for the patients was 20.0%, but the presence of C. difficile in the gut microbiota was not associated with mortality. Machine learning showed that taxonomic profiling at the genus level best reflected patient prognosis. The in-hospital mortality of patients was associated with the relative abundance of specific gut microbial genera rather than alpha-diversity: each of the five genera correlated either positively (Enterococcus, Klebsiella, Corynebacterium, Pseudomonas, and Anaerofustis) or negatively (Bifidobacterium, Bacteroides, Streptococcus, Faecalibacterium, and Dorea). Genes for vancomycin resistance were significantly associated with in-hospital mortality in patients with AAD (adjusted hazard ratios, 2.45; 95% CI, 1.20-4.99).<br><br>CONCLUSION: This study demonstrates the potential utility of metagenomic studies of the gut microbial community as a biomarker for prognosis prediction in AAD patients.}, }
@article {pmid39244052, year = {2024}, author = {Wang, Q and Chen, J and Qi, W and Bai, Y and Mao, J and Qu, J}, title = {Dam construction alters the traits of health-related microbes along the Yangtze River.}, journal = {The Science of the total environment}, volume = {953}, number = {}, pages = {176077}, doi = {10.1016/j.scitotenv.2024.176077}, pmid = {39244052}, issn = {1879-1026}, mesh = {*Rivers/microbiology ; China ; Water Microbiology ; Drug Resistance, Microbial/genetics ; Microbiota ; Environmental Monitoring ; Ecosystem ; Virulence Factors/genetics ; }, abstract = {Dams, constructed globally for energy production and water conservation, fragment rivers, and modify flow regimes, thereby altering the composition of biological communities and ecosystem functions. Despite the extensive use of dams, few studies have explored their potential health impacts, particularly concerning changes in health-related genes, such as antibiotic resistance genes (ARGs) and virulence factor genes (VFGs), and their hosts (i.e., ARB and potential pathogens). Understanding these health-related effects is crucial because they can impact human health through water quality and pathogen prevalence. In this study, we investigated the planktonic microbial community in the Three Gorges Reservoir (TGR) and adjacent upstream and downstream areas of the Yangtze River during both the dry and wet season. Our metagenomic analysis showed that dam construction significantly decreased the abundance of ARGs, but it had an insignificant effect on VFGs. The observed reduction in ARGs abundance could be mainly attributed to the decrease abundance of the major ARGs carrier - Limnohabitansin the TGR and downstream areas due to high grazing pressure and fitness cost. Conversely, the abundance of microbes carrying VFGs (potential pathogens) remained stable from upstream to the dam reservoir, which may explain the negligible impact on VFG abundance. Overall, our results provide a detailed understanding of the ecological health implications of dam construction in large river ecosystems.}, }
@article {pmid39243610, year = {2025}, author = {Jiang, L and Shen, S and Zuo, A and Chi, Y and Lu, Y and He, Q}, title = {Characterizing flavor development in low-salt Chinese horse bean-chili paste through integrated metabolomics and metagenomics.}, journal = {Food chemistry}, volume = {463}, number = {Pt 1}, pages = {141076}, doi = {10.1016/j.foodchem.2024.141076}, pmid = {39243610}, issn = {1873-7072}, mesh = {*Bacteria/classification/isolation &amp; purification ; Capsicum/chemistry/microbiology ; Fermentation ; *Fermented Foods/analysis/microbiology ; *Metabolomics ; *Metagenomics ; Microbiota ; Sodium Chloride/analysis ; *Taste ; }, abstract = {This study utilized metabolomics and metagenomics to investigate the microbial composition and functions in low- and high-salt Chinese horse bean-chili pastes (CHCPs). The results showed that 25 key metabolites were identified to distinguish the flavor attributes between the two samples. Leuconostoc was identified as the dominant microbiota in low-salt CHCP, while Pantoea prevailed in the high-salt CHCP. Compared to traditional high-salt fermentation, low-salt and inoculated fermentation promoted the increase in the relative abundances of Companionlactobacillus, Levilactobacillus, Tetragenococcus, Zygosaccharomyces and Wickerhamiella as well as the enrichment of carbohydrate and amino acid metabolic pathways, which contributed to the enhancement of characteristic flavor compounds. Further metabolic pathway reconstruction elucidated 21 potential microbial genera associated with the formation of key metabolites, such as Leuconostoc, Levilactobacillus, Pantoea, and Pectobacterium. This study may provide insights for optimizing the fermentation process and improving the flavor quality of low-salt CHCP and similar fermentation products. KEYWORDS: Low-salt fermentation Hight-salt fermentation Chinese horse-bean chili paste Flavor formation Metabolomics Metagenomics.}, }
@article {pmid39243471, year = {2024}, author = {Cai, M and Zhang, H and Zheng, L and Tang, X}, title = {A global microbiome analysis reveals the ecological feature of Tistrella and its production of the bioactive didemnins in the marine ecosystem.}, journal = {Marine pollution bulletin}, volume = {207}, number = {}, pages = {116939}, doi = {10.1016/j.marpolbul.2024.116939}, pmid = {39243471}, issn = {1879-3363}, mesh = {*Microbiota ; *Ecosystem ; Aquatic Organisms ; Metagenomics ; Seawater/microbiology/chemistry ; }, abstract = {Marine microorganisms like Tistrella are essential for producing bioactive compounds, including didemnins with antitumor and antiviral properties. However, our understanding of Tistrella's ecological features and didemnin production in natural environments is limited. In this study, we used genomics and metagenomics to show that Tistrella is widely distributed across natural habitats, especially in marine environments from the surface to 5000 m deep, with distinct non-random distribution patterns revealed by co-occurrence analysis. Importantly, transcriptional profiling of didemnin biosynthetic gene clusters indicates active in situ production of this compound within marine ecosystems. These findings enhance our understanding of Tistrella's ecology and secondary metabolite production in natural environments. Further research is needed to explore the ecological dynamics and functional impacts of Tistrella in these ecosystems.}, }
@article {pmid39243463, year = {2024}, author = {Ren, M and Hu, A and Zhang, L and Yao, X and Zhao, Z and Kimirei, IA and Wang, J}, title = {Acidic proteomes are linked to microbial alkaline preference in African lakes.}, journal = {Water research}, volume = {266}, number = {}, pages = {122393}, doi = {10.1016/j.watres.2024.122393}, pmid = {39243463}, issn = {1879-2448}, mesh = {*Lakes/microbiology ; *Proteome ; Hydrogen-Ion Concentration ; Bacteria/metabolism/genetics ; Amino Acids/metabolism ; Microbiota ; }, abstract = {Microbial amino acid composition (AA) reflects adaptive strategies of cellular and molecular regulations such as a high proportion of acidic AAs, including glutamic and aspartic acids in alkaliphiles. It remains understudied how microbial AA content is linked to their pH adaptation especially in natural environments. Here we examined prokaryotic communities and their AA composition of genes with metagenomics for 39 water and sediments of East African lakes along a gradient of pH spanning from 7.2 to 10.1. We found that Shannon diversity declined with the increasing pH and that species abundance were either positively or negatively associated with pH, indicating their distinct habitat preference in lakes. Microbial communities showed higher acidic proteomes in alkaline than neutral lakes. Species acidic proteomes were also positively correlated with their pH preference, which was consistent across major bacterial lineages. These results suggest selective pressure associated with high pH likely shape microbial amino acid composition both at the species and community levels. Comparative genome analyses further revealed that alkaliphilic microbes contained more functional genes with higher acidic AAs when compared to those in neutral conditions. These traits included genes encoding diverse classes of cation transmembrane transporters, antiporters, and compatible solute transporters, which are involved in cytoplasmic pH homeostasis and osmotic stress defense under high pH conditions. Our results provide the field evidence for the strong relationship between prokaryotic AA composition and their habitat preference and highlight amino acid optimization as strategies for environmental adaptation.}, }
@article {pmid39243135, year = {2024}, author = {Shi, K and Liu, X and Duan, Y and Ding, J and Jia, Y and Jiang, Z and Feng, C}, title = {Multi-omics analysis reveals associations between host gene expression, gut microbiota, and metabolites in chickens.}, journal = {Journal of animal science}, volume = {102}, number = {}, pages = {}, pmid = {39243135}, issn = {1525-3163}, mesh = {Animals ; *Chickens/microbiology/metabolism ; *Gastrointestinal Microbiome ; Female ; *Metabolome ; Transcriptome ; Liver/metabolism ; Gene Expression Profiling ; Gene Expression ; Multiomics ; }, abstract = {Egg-laying is an important trait in chickens, and it is affected by many factors, such as hormones regulated by the hypothalamic-pituitary axis and precursors synthesized by the liver. Recent studies showed that gut microbiota was associated with egg-laying, however, its underlying mechanism remains unclear. We comprehensively analyzed the host transcriptome, gut microbiota, and metabolome in broiler breeder hens during the pre-laying, peak-laying, and late-laying periods. The transcriptome analysis of the tissues related to the hypothalamic-pituitary-liver (HPL) axis revealed dynamic gene expression during egg-laying periods. Differentially expressed genes (DEGs) (i.e., PENK, NPY, AVP, PRL, RLN3, and FST) from the hypothalamus and pituitary gland were involved in female gonadal development, hormone secretion, response to endogenous stimulus, liver development, and amide metabolism. In liver, DEGs (i.e., FABP3, VTG1, LPL, APOA5, APOV1, and RBP5) were enriched in efferocytosis, sphingolipid metabolism, amide, and peptide biosynthesis. Alpha and beta diversity changed significantly in cecum microbiota during different laying periods. The abundance of Firmicutes was decreased and the abundance of Bacteroidota was increased during the peak-laying period. Functional analysis showed that the biosynthesis of secondary metabolites, amino acids, purine, and steroid hormones was altered during laying. The metabolome analysis from cecal contents showed that amino acid metabolism and steroid hormone biosynthesis changed during laying. Integrated analysis of the cecal microbiota and metabolites showed the genus Megasphaera was involved in amino acid metabolism, which included 3-phenyllatic acid, quinic acid, caffeic acid, and folic acid, and the genus Hungatella participated in steroid hormone biosynthesis through its strong correlation with estradiol. These results explored the dynamic changes in tissues related to the HPL axis and cecal microbiota and provided new insights into the interaction between the host and microbiota during egg-laying in chickens.}, }
@article {pmid39242817, year = {2024}, author = {Shao, Y and Garcia-Mauriño, C and Clare, S and Dawson, NJR and Mu, A and Adoum, A and Harcourt, K and Liu, J and Browne, HP and Stares, MD and Rodger, A and Brocklehurst, P and Field, N and Lawley, TD}, title = {Primary succession of Bifidobacteria drives pathogen resistance in neonatal microbiota assembly.}, journal = {Nature microbiology}, volume = {9}, number = {10}, pages = {2570-2582}, pmid = {39242817}, issn = {2058-5276}, support = {/WT_/Wellcome Trust/United Kingdom ; WT101169MA, 206194 and 108413/A/15/D//Wellcome Trust (Wellcome)/ ; }, mesh = {Humans ; *Feces/microbiology ; Animals ; Infant, Newborn ; *Gastrointestinal Microbiome ; *Bifidobacterium/genetics/isolation &amp; purification ; Mice ; Female ; United Kingdom ; Metagenomics ; Enterococcus faecalis/genetics/isolation &amp; purification ; Milk, Human/microbiology ; Male ; }, abstract = {Human microbiota assembly commences at birth, seeded by both maternal and environmental microorganisms. Ecological theory postulates that primary colonizers dictate microbial community assembly outcomes, yet such microbial priority effects in the human gut remain underexplored. Here using longitudinal faecal metagenomics, we characterized neonatal microbiota assembly for a cohort of 1,288 neonates from the UK. We show that the pioneering neonatal gut microbiota can be stratified into one of three distinct community states, each dominated by a single microbial species and influenced by clinical and host factors, such as maternal age, ethnicity and parity. A community state dominated by Enterococcus faecalis displayed stochastic microbiota assembly with persistent high pathogen loads into infancy. In contrast, community states dominated by Bifidobacterium, specifically B. longum and particularly B. breve, exhibited a stable assembly trajectory and long-term pathogen colonization resistance, probably due to strain-specific functional adaptions to a breast milk-rich neonatal diet. Consistent with our human cohort observation, B. breve demonstrated priority effects and conferred pathogen colonization resistance in a germ-free mouse model. Our findings solidify the crucial role of Bifidobacteria as primary colonizers in shaping the microbiota assembly and functions in early life.}, }
@article {pmid39242698, year = {2024}, author = {Lu, X and Gong, G and Zhang, Q and Yang, S and Wu, H and Zhao, M and Wang, X and Shen, Q and Ji, L and Liu, Y and Wang, Y and Liu, J and Suolang, S and Ma, X and Shan, T and Zhang, W}, title = {Metagenomic analysis reveals high diversity of gut viromes in yaks (Bos grunniens) from the Qinghai-Tibet Plateau.}, journal = {Communications biology}, volume = {7}, number = {1}, pages = {1097}, pmid = {39242698}, issn = {2399-3642}, mesh = {Animals ; Cattle ; *Metagenomics ; *Gastrointestinal Microbiome/genetics ; *Virome/genetics ; Tibet ; Metagenome ; }, abstract = {The Qinghai-Tibet Plateau (QTP), renowned for its exceptional biological diversity, is home to numerous endemic species. However, research on the virology of vulnerable vertebrates like yaks remains limited. In this study, our objective was to use metagenomics to provide a comprehensive understanding of the diversity and evolution of the gut virome in yak populations across different regions of the QTP. Our findings revealed a remarkably diverse array of viruses in the gut of yaks, including those associated with vertebrates and bacteriophages. Notably, some vertebrate-associated viruses, such as astrovirus and picornavirus, showed significant sequence identity across diverse yak populations. Additionally, we observed differences in the functional profiles of genes carried by the yak gut virome across different regions. Moreover, the virus-bacterium symbiotic network that we discovered holds potential significance in maintaining the health of yaks. Overall, this research expands our understanding of the viral communities in the gut of yaks and highlights the importance of further investigating the interactions between viruses and their hosts. These data will be beneficial for revealing the crucial role that viruses play in the yak gut ecology in future studies.}, }
@article {pmid39242535, year = {2024}, author = {Attrah, M and Schärer, MR and Esposito, M and Gionchetta, G and Bürgmann, H and Lens, PNL and Fenner, K and van de Vossenberg, J and Robinson, SL}, title = {Disentangling abiotic and biotic effects of treated wastewater on stream biofilm resistomes enables the discovery of a new planctomycete beta-lactamase.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {164}, pmid = {39242535}, issn = {2049-2618}, support = {109070/WT_/Wellcome Trust/United Kingdom ; Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung, 186531 (ANTIVERSA as part of biodeversa+, European Biodiversity Partnership)//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung, 186531 (ANTIVERSA as part of biodeversa+, European Biodiversity Partnership)//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; 200021L_201006//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; PZPGP2_209124//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; }, mesh = {*Biofilms/drug effects ; *Wastewater/microbiology ; *beta-Lactamases/genetics ; *Rivers/microbiology ; *Metagenomics ; Microbiota/drug effects ; Bacteria/genetics/classification/drug effects/isolation &amp; purification ; Anti-Bacterial Agents/pharmacology ; Planctomycetales/genetics/drug effects ; Metagenome ; Bacterial Proteins/genetics/metabolism ; }, abstract = {BACKGROUND: Environmental reservoirs of antibiotic resistance pose a threat to human and animal health. Aquatic biofilms impacted by wastewater effluent (WW) are known environmental reservoirs for antibiotic resistance; however, the relative importance of biotic factors and abiotic factors from WW on the abundance of antibiotic resistance genes (ARGs) within aquatic biofilms remains unclear. Additionally, experimental evidence is limited within complex aquatic microbial communities as to whether genes bearing low sequence similarity to validated reference ARGs are functional as ARGs.<br><br>RESULTS: To disentangle the effects of abiotic and biotic factors on ARG abundances, natural biofilms were previously grown in flume systems with different proportions of stream water and either ultrafiltered or non-ultrafiltered WW. In this study, we conducted deep shotgun metagenomic sequencing of 75 biofilm, stream, and WW samples from these flume systems and compared the taxonomic and functional microbiome and resistome composition. Statistical analysis revealed an alignment of the resistome and microbiome composition and a significant association with experimental treatment. Several ARG classes exhibited an increase in normalized metagenomic abundances in biofilms grown with increasing percentages of non-ultrafiltered WW. In contrast, sulfonamide and extended-spectrum beta-lactamase ARGs showed greater abundances in biofilms grown in ultrafiltered WW compared to non-ultrafiltered WW. Overall, our results pointed toward the dominance of biotic factors over abiotic factors in determining ARG abundances in WW-impacted stream biofilms and suggested gene family-specific mechanisms for ARGs that exhibited divergent abundance patterns. To investigate one of these specific ARG families experimentally, we biochemically characterized a new beta-lactamase from the Planctomycetota (Phycisphaeraceae). This beta-lactamase displayed activity in the cleavage of cephalosporin analog despite sharing a low sequence identity with known ARGs.<br><br>CONCLUSIONS: This discovery of a functional planctomycete beta-lactamase ARG is noteworthy, not only because it was the first beta-lactamase to be biochemically characterized from this phylum, but also because it was not detected by standard homology-based ARG tools. In summary, this study conducted a metagenomic analysis of the relative importance of biotic and abiotic factors in the context of WW discharge and their impact on both known and new ARGs in aquatic biofilms. Video Abstract.}, }
@article {pmid39240096, year = {2024}, author = {Ruiz-Perez, D and Gimon, I and Sazal, M and Mathee, K and Narasimhan, G}, title = {Unfolding and de-confounding: biologically meaningful causal inference from longitudinal multi-omic networks using METALICA.}, journal = {mSystems}, volume = {9}, number = {10}, pages = {e0130323}, pmid = {39240096}, issn = {2379-5077}, support = {R15 AI128714/AI/NIAID NIH HHS/United States ; Dissertation Year Fellowship//University Graduate School, Florida International University (UGS)/ ; 1R15AI128714-01//HHS | NIH | OSC | Common Fund (NIH Common Fund)/ ; }, mesh = {Humans ; *Algorithms ; Microbiota/genetics ; Longitudinal Studies ; Gastrointestinal Microbiome/genetics ; Metabolomics ; Computational Biology/methods ; Multiomics ; }, abstract = {UNLABELLED: A key challenge in the analysis of microbiome data is the integration of multi-omic datasets and the discovery of interactions between microbial taxa, their expressed genes, and the metabolites they consume and/or produce. In an effort to improve the state of the art in inferring biologically meaningful multi-omic interactions, we sought to address some of the most fundamental issues in causal inference from longitudinal multi-omics microbiome data sets. We developed METALICA, a suite of tools and techniques that can infer interactions between microbiome entities. METALICA introduces novel unrolling and de-confounding techniques used to uncover multi-omic entities that are believed to act as confounders for some of the relationships that may be inferred using standard causal inferencing tools. The results lend support to predictions about biological models and processes by which microbial taxa interact with each other in a microbiome. The unrolling process helps identify putative intermediaries (genes and/or metabolites) to explain the interactions between microbes; the de-confounding process identifies putative common causes that may lead to spurious relationships to be inferred. METALICA was applied to the networks inferred by existing causal discovery, and network inference algorithms were applied to a multi-omics data set resulting from a longitudinal study of IBD microbiomes. The most significant unrollings and de-confoundings were manually validated using the existing literature and databases.<br><br>IMPORTANCE: We have developed a suite of tools and techniques capable of inferring interactions between microbiome entities. METALICA introduces novel techniques called unrolling and de-confounding that are employed to uncover multi-omic entities considered to be confounders for some of the relationships that may be inferred using standard causal inferencing tools. To evaluate our method, we conducted tests on the inflammatory bowel disease (IBD) dataset from the iHMP longitudinal study, which we pre-processed in accordance with our previous work. From this dataset, we generated various subsets, encompassing different combinations of metagenomics, metabolomics, and metatranscriptomics datasets. Using these multi-omics datasets, we demonstrate how the unrolling process aids in the identification of putative intermediaries (genes and/or metabolites) to explain the interactions between microbes. Additionally, the de-confounding process identifies potential common causes that may give rise to spurious relationships to be inferred. The most significant unrollings and de-confoundings were manually validated using the existing literature and databases.}, }
@article {pmid39239875, year = {2024}, author = {Kwan, SY and Gonzales, KA and Jamal, MA and Stevenson, HL and Tan, L and Lorenzi, PL and Futreal, PA and Hawk, ET and McCormick, JB and Fisher-Hoch, SP and Jenq, RR and Beretta, L}, title = {Protection against fibrosis by a bacterial consortium in metabolic dysfunction-associated steatohepatitis and the role of amino acid metabolism.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2399260}, pmid = {39239875}, issn = {1949-0984}, support = {P30 CA016672/CA/NCI NIH HHS/United States ; P50 CA217674/CA/NCI NIH HHS/United States ; UL1 TR000371/TR/NCATS NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Humans ; *Liver Cirrhosis/microbiology/metabolism ; Mice ; *Amino Acids/metabolism ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; Male ; *Liver/metabolism/pathology/microbiology ; Female ; Feces/microbiology ; Mice, Inbred C57BL ; Middle Aged ; Fatty Liver/metabolism/microbiology ; Disease Models, Animal ; Metagenome ; Adult ; }, abstract = {The gut microbiota drives progression to liver fibrosis, the main determinant of mortality in metabolic dysfunction-associated steatohepatitis (MASH). In this study, we aimed to identify bacterial species associated with protection against liver fibrosis in a high-risk population, and test their potential to protect against liver fibrosis in vivo. Based on stool shotgun metagenomic sequencing of 340 subjects from a population cohort disproportionally affected by MASH, we identified bacterial species from the Bacteroidales and Clostridiales orders associated with reduced risk of liver fibrosis. A bacterial consortium was subsequently tested in a mouse model of MASH, which demonstrated protective effects against liver fibrosis. Six of the eight inoculated bacteria were detected in mouse stool and liver. Intrahepatic presence of bacteria was further confirmed by bacterial culture of mouse liver tissue. Changes in liver histological parameters, gut functional profiles, and amino acid profiles were additionally assessed. Comparison between fibrosis-associated human metagenome and bacteria-induced metagenome changes in mice identified microbial functions likely to mediate the protective effect against liver fibrosis. Amino acid profiling confirmed an increase in cysteine synthase activity, associated with reduced fibrosis. Other microbiota-induced changes in amino acids associated with reduced fibrosis included increased gut asparaginase activity and decreased hepatic tryptophan-to-kynurenine conversion. This human-to-mouse study identified bacterial species and their effects on amino acid metabolism as innovative strategies to protect against liver fibrosis in MASH.}, }
@article {pmid39238368, year = {2024}, author = {Hansen, AK and Argondona, JA and Miao, S and Percy, DM and Degnan, PH}, title = {Rapid Loss of Nutritional Symbionts in an Endemic Hawaiian Herbivore Radiation Is Associated with Plant Galling Habit.}, journal = {Molecular biology and evolution}, volume = {41}, number = {9}, pages = {}, pmid = {39238368}, issn = {1537-1719}, mesh = {Animals ; *Symbiosis ; *Herbivory ; *Hemiptera/microbiology ; RNA, Ribosomal, 16S/genetics ; Hawaii ; Phylogeny ; Biological Evolution ; Microbiota ; }, abstract = {Insect herbivores frequently cospeciate with symbionts that enable them to survive on nutritionally unbalanced diets. While ancient symbiont gain and loss events have been pivotal for insect diversification and feeding niche specialization, evidence of recent events is scarce. We examine the recent loss of nutritional symbionts (in as little as 1 MY) in sap-feeding Pariaconus, an endemic Hawaiian insect genus that has undergone adaptive radiation, evolving various galling and free-living ecologies on a single host-plant species, Metrosideros polymorpha within the last ∼5 MY. Using 16S rRNA sequencing, we investigated the bacterial microbiomes of 19 Pariaconus species and identified distinct symbiont profiles associated with specific host-plant ecologies. Phylogenetic analyses and metagenomic reconstructions revealed significant differences in microbial diversity and functions among psyllids with different host-plant ecologies. Within a few millions of years, Pariaconus species convergently evolved the closed-gall habit twice. This shift to enclosed galls coincided with the loss of the Morganella-like symbiont that provides the essential amino acid arginine to free-living and open-gall sister species. After the Pariaconus lineage left Kauai and colonized younger islands, both open- and closed-gall species lost the Dickeya-like symbiont. This symbiont is crucial for synthesizing essential amino acids (phenylalanine, tyrosine, and lysine) as well as B vitamins in free-living species. The recurrent loss of these symbionts in galling species reinforces evidence that galls are nutrient sinks and, combined with the rapidity of the evolutionary timeline, highlights the dynamic role of insect-symbiont relationships during the diversification of feeding ecologies. We propose new Candidatus names for the novel Morganella-like and Dickeya-like symbionts.}, }
@article {pmid39237540, year = {2024}, author = {Ravikrishnan, A and Wijaya, I and Png, E and Chng, KR and Ho, EXP and Ng, AHQ and Mohamed Naim, AN and Gounot, JS and Guan, SP and Hanqing, JL and Guan, L and Li, C and Koh, JY and de Sessions, PF and Koh, WP and Feng, L and Ng, TP and Larbi, A and Maier, AB and Kennedy, BK and Nagarajan, N}, title = {Gut metagenomes of Asian octogenarians reveal metabolic potential expansion and distinct microbial species associated with aging phenotypes.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7751}, pmid = {39237540}, issn = {2041-1723}, mesh = {Aged, 80 and over ; Female ; Humans ; Male ; *Aging ; Asian People/genetics ; Bacteria/genetics/classification/metabolism/isolation &amp; purification ; Bacteroides/genetics/metabolism ; Cohort Studies ; Feces/microbiology ; *Gastrointestinal Microbiome/genetics ; *Metagenome ; Metagenomics/methods ; Phenotype ; Singapore ; Octogenarians ; }, abstract = {While rapid demographic changes in Asia are driving the incidence of chronic aging-related diseases, the limited availability of high-quality in vivo data hampers our ability to understand complex multi-factorial contributions, including gut microbial, to healthy aging. Leveraging a well-phenotyped cohort of community-living octogenarians in Singapore, we used deep shotgun-metagenomic sequencing for high-resolution taxonomic and functional characterization of their gut microbiomes (n = 234). Joint species-level analysis with other Asian cohorts identified distinct age-associated shifts characterized by reduction in microbial richness, and specific Alistipes and Bacteroides species enrichment (e.g., Alistipes shahii and Bacteroides xylanisolvens). Functional analysis confirmed these changes correspond to metabolic potential expansion in aging towards alternate pathways synthesizing and utilizing amino-acid precursors, vis-à-vis dominant microbial guilds producing butyrate in gut from pyruvate (e.g., Faecalibacterium prausnitzii, Roseburia inulinivorans). Extending these observations to key clinical markers helped identify >10 robust microbial associations to inflammation, cardiometabolic and liver health, including potential probiotic species (e.g., Parabacteroides goldsteinii) and pathobionts (e.g., Klebsiella pneumoniae), highlighting the microbiome's role as biomarkers and potential targets for promoting healthy aging.}, }
@article {pmid39236827, year = {2024}, author = {Xu, W and Xu, Y and Sun, R and Rey Redondo, E and Leung, KK and Wan, SH and Li, J and Yung, CCM}, title = {Revealing the intricate temporal dynamics and adaptive responses of prokaryotic and eukaryotic microbes in the coastal South China Sea.}, journal = {The Science of the total environment}, volume = {952}, number = {}, pages = {176019}, doi = {10.1016/j.scitotenv.2024.176019}, pmid = {39236827}, issn = {1879-1026}, mesh = {China ; *Phytoplankton/physiology/genetics ; *Seawater/microbiology ; Microbiota ; Cyanobacteria/genetics/physiology ; Photosynthesis ; Seasons ; Metagenome ; }, abstract = {This comprehensive two-year investigation in the coastal South China Sea has advanced our understanding of marine microbes at both community and genomic levels. By combining metagenomics and metatranscriptomics, we have revealed the intricate temporal dynamics and remarkable adaptability of microbial communities and phytoplankton metagenome-assembled genomes (MAGs) in response to environmental fluctuations. We observed distinct seasonal shifts in microbial community composition and function: cyanobacteria were predominant during warmer months, whereas photosynthetic protists were more abundant during colder seasons. Notably, metabolic marker KOs of photosynthesis were consistently active throughout the year, underscoring the persistent role of these processes irrespective of seasonal changes. Our analysis reveals that environmental parameters such as temperature, salinity, and nitrate concentrations profoundly influence microbial community composition, while temperature and silicate have emerged as crucial factors shaping their functional traits. Through the recovery and analysis of 37 phytoplankton MAGs, encompassing nine prokaryotic cyanobacteria and 28 eukaryotic protists from diverse phyla, we have gained insights into their genetic diversity and metabolic capabilities. Distinct profiles of photosynthesis-related pathways including carbon fixation, carotenoid biosynthesis, photosynthesis-antenna proteins, and photosynthesis among the MAGs indicated their genetic adaptations to changing environmental conditions. This study not only enhances our understanding of microbial dynamics in coastal marine ecosystems but also sheds light on the ecological roles and adaptive responses of different microbial groups to environmental changes.}, }
@article {pmid39236503, year = {2024}, author = {Wang, D and Meng, Y and Huang, LN and Zhang, XX and Luo, X and Meng, F}, title = {A comprehensive catalog encompassing 1376 species-level genomes reveals the core community and functional diversity of anammox microbiota.}, journal = {Water research}, volume = {266}, number = {}, pages = {122356}, doi = {10.1016/j.watres.2024.122356}, pmid = {39236503}, issn = {1879-2448}, mesh = {*Microbiota ; Bacteria/genetics/classification/metabolism ; Metagenome ; Wastewater/microbiology ; }, abstract = {Research on the microbial community and function of the anammox process for environmentally friendly wastewater treatment has achieved certain success, which may mean more universal insights are needed. However, the comprehensive understanding of the anammox process is constrained by the limited taxonomic assignment and functional characterization of anammox microbiota, primarily due to the scarcity of high-quality genomes for most organisms. This study reported a global genome catalog of anammox microbiotas based on numerous metagenomes obtained from both lab- and full-scale systems. A total of 1376 candidate species from 7474 metagenome-assembled genomes were used to construct the genome catalog, providing extensive microbial coverage (averaged of 92.40 %) of anammox microbiota. Moreover, a total of 64 core genera and 44 core species were identified, accounting for approximately 64.25 % and 43.97 %, respectively, of anammox microbiota. The strict core genera encompassed not only functional bacteria (e.g., Brocadia, Desulfobacillus, Zeimonas, and Nitrosomonas) but also two candidate genera (UBA12294 and OLB14) affiliated with the order Anaerolineales. In particular, core denitrifying bacteria with observably taxonomic diversity exhibited diverse functional profiles; for instance, the potential of carbohydrate metabolism in Desulfobacillus and Zeimonas likely improves the mixotrophic lifestyle of anammox microbiota. Besides, a noteworthy association was detected between anammox microbiota and system type. Microbiota in coupling system exhibited complex diversity and interspecies interactions by limiting numerous core denitrifying bacteria. In summary, the constructed catalog substantially expands our understanding of the core community and their functions of anammox microbiota, providing a valuable resource for future studies on anammox systems.}, }
@article {pmid39235751, year = {2025}, author = {Lemée, P and Bridier, A}, title = {Bioinformatic Pipeline for Profiling Foodborne Bacterial Ecology and Resistome from Short-Read Metagenomics.}, journal = {Methods in molecular biology (Clifton, N.J.)}, volume = {2852}, number = {}, pages = {289-309}, pmid = {39235751}, issn = {1940-6029}, mesh = {*Metagenomics/methods ; *Computational Biology/methods ; *Food Microbiology/methods ; *Bacteria/genetics ; *High-Throughput Nucleotide Sequencing/methods ; Metagenome ; Microbiota/genetics ; }, abstract = {Next-generation sequencing revolutionized food safety management these last years providing access to a huge quantity of valuable data to identify, characterize, and monitor bacterial pathogens on the food chain. Shotgun metagenomics emerged as a particularly promising approach as it enables in-depth taxonomic profiling and functional investigation of food microbial communities. In this chapter, we provide a comprehensive step-by-step bioinformatical workflow to characterize bacterial ecology and resistome composition from metagenomic short-reads obtained by shotgun sequencing.}, }
@article {pmid39235268, year = {2024}, author = {Sudarshan, AS and Dai, Z and Gabrielli, M and Oosthuizen-Vosloo, S and Konstantinidis, KT and Pinto, AJ}, title = {New Drinking Water Genome Catalog Identifies a Globally Distributed Bacterial Genus Adapted to Disinfected Drinking Water Systems.}, journal = {Environmental science &amp; technology}, volume = {58}, number = {37}, pages = {16475-16487}, pmid = {39235268}, issn = {1520-5851}, mesh = {*Drinking Water/microbiology ; Disinfection ; Bacteria/genetics ; Microbiota ; Genome, Bacterial ; Metagenome ; }, abstract = {Genome-resolved insights into the structure and function of the drinking water microbiome can advance the effective management of drinking water quality. To enable this, we constructed and curated thousands of metagenome-assembled and isolate genomes from drinking water distribution systems globally to develop a Drinking Water Genome Catalog (DWGC). The current DWGC disproportionately represents disinfected drinking water systems due to a paucity of metagenomes from nondisinfected systems. Using the DWGC, we identify core genera of the drinking water microbiome including a genus (UBA4765) within the order Rhizobiales that is frequently detected and highly abundant in disinfected drinking water systems. We demonstrate that this genus has been widely detected but incorrectly classified in previous amplicon sequencing-based investigations of the drinking water microbiome. Further, we show that a single genome variant (genomovar) within this genus is detected in 75% of drinking water systems included in this study. We propose a name for this uncultured bacterium as "Raskinella chloraquaticus" and describe the genus as "Raskinella" (endorsed by SeqCode). Metabolic annotation and modeling-based predictions indicate that this bacterium is capable of necrotrophic growth, is able to metabolize halogenated compounds, proliferates in a biofilm-based environment, and shows clear indications of disinfection-mediated selection.}, }
@article {pmid39235252, year = {2024}, author = {Sweet, P and Burroughs, M and Jang, S and Contreras, L}, title = {TolRad, a model for predicting radiation tolerance using Pfam annotations, identifies novel radiosensitive bacterial species from reference genomes and MAGs.}, journal = {Microbiology spectrum}, volume = {12}, number = {10}, pages = {e0383823}, pmid = {39235252}, issn = {2165-0497}, support = {HDTRA1-17-1-0025//DOD | Defense Threat Reduction Agency (DTRA)/ ; FA9550-20-1-0131//DOD | USAF | AMC | Air Force Office of Scientific Research (AFOSR)/ ; W911NF22S0002//DNI | Intelligence Advanced Research Projects Activity (IARPA)/ ; }, mesh = {*Radiation Tolerance/genetics ; *Bacteria/genetics/radiation effects/classification ; *Genome, Bacterial ; Humans ; Radiation, Ionizing ; Bacterial Proteins/genetics/metabolism ; Microbiota/genetics/radiation effects ; Proteome ; Metagenome ; Molecular Sequence Annotation ; }, abstract = {UNLABELLED: The trait of ionizing radiation (IR) tolerance is variable between bacterium, with species succumbing to acute doses as low as 60 Gy and extremophiles able to survive doses exceeding 10,000 Gy. While survival screens have identified multiple highly radioresistant bacteria, such systemic searches have not been conducted for IR-sensitive bacteria. The taxonomy-level diversity of IR sensitivity is poorly understood, as are genetic elements that influence IR sensitivity. Using the protein domain (Pfam) frequencies from 61 bacterial species with experimentally determined D10 values (the dose at which only 10% of the population survives), we trained TolRad, a random forest binary classifier, to distinguish between radiosensitive (D10 < 200 Gy) and radiation-tolerant (D10 > 200 Gy) bacteria. On untrained species, TolRad had an accuracy of 0.900. We applied TolRad to 152 UniProt-hosted bacterial proteomes associated with the human microbiome, including 37 strains from the ATCC Human Microbiome Collection, and classified 34 species as radiosensitive. Whereas IR-sensitive species (D10 < 200 Gy) in the training data set had been confined to the phylum Proteobacterium, this initial TolRad screen identified radiosensitive bacteria in two additional phyla. We experimentally validated the predicted radiosensitivity of a Bacteroidota species from the human microbiome. To demonstrate that TolRad can be applied to metagenome-assembled genomes (MAGs), we tested the accuracy of TolRad on Egg-NOG assembled proteomes (0.965) and partial proteomes. Finally, three collections of MAGs were screened using TolRad, identifying further phyla with radiosensitive species and suggesting that environmental conditions influence the abundance of radiosensitive bacteria.<br><br>IMPORTANCE: Bacterial species have vast genetic diversity, allowing for life in extreme environments and the conduction of complex chemistry. The ability to harness the full potential of bacterial diversity is hampered by the lack of high-throughput experimental or bioinformatic methods for characterizing bacterial traits. Here, we present a computational model that uses de novo-generated genome annotations to classify a bacterium as tolerant of ionizing radiation (IR) or as radiosensitive. This model allows for rapid screening of bacterial communities for low-tolerance species that are of interest for both mechanistic studies into bacterial sensitivity to IR and biomarkers of IR exposure.}, }
@article {pmid39233185, year = {2024}, author = {Huang, J and Wang, C and Huang, X and Zhang, Q and Feng, R and Wang, X and Zhang, S and Wang, J}, title = {Long-term effect of phenol, quinoline, and pyridine on nitrite accumulation in the nitrification process: performance, microbial community, metagenomics and molecular docking analysis.}, journal = {Bioresource technology}, volume = {412}, number = {}, pages = {131407}, doi = {10.1016/j.biortech.2024.131407}, pmid = {39233185}, issn = {1873-2976}, mesh = {*Molecular Docking Simulation ; *Nitrification ; *Nitrites/metabolism ; *Quinolines/pharmacology ; *Metagenomics/methods ; *Pyridines/pharmacology/metabolism ; Phenol ; Bacteria/metabolism/drug effects ; Microbiota/drug effects ; Wastewater ; Oxidoreductases/metabolism ; Ammonia/metabolism ; }, abstract = {Phenol, quinoline, and pyridine, commonly found in industrial wastewater, disrupt the nitrification process, leading to nitrite accumulation. This study explores the potential mechanisms through which these biotoxic organic compounds affect nitrite accumulation, using metagenomic and molecular docking analyses. Despite increasing concentrations of these compounds from 40 to 160 mg/L, ammonia nitrogen removal was not hindered, and stable nitrite accumulation rates exceeding 90 % were maintained. Additionally, these compounds inhibited nitrite-oxidizing bacteria (NOB) and enriched ammonia-oxidizing bacteria (AOB) in situ. As the concentration of these compounds rose, protein (PN) and polysaccharide (PS) concentrations also increased, along with a higher PN/PS ratio. Metagenomic analysis further revealed an increase in hao relative abundance, while microbial community analysis showed increased Nitrosomonas abundance, which contributed to nitrite accumulation stability. Molecular docking indicated that these compounds have lower binding energy with hydroxylamine oxidoreductase (HAO) and nitrate reductase (NAR), theoretically supporting the observed sustained nitrite accumulation.}, }
@article {pmid39232827, year = {2024}, author = {Sun, C and Hu, G and Yi, L and Ge, W and Yang, Q and Yang, X and He, Y and Liu, Z and Chen, WH}, title = {Integrated analysis of facial microbiome and skin physio-optical properties unveils cutotype-dependent aging effects.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {163}, pmid = {39232827}, issn = {2049-2618}, support = {2019YFA0905600//National Key Research and Development Program of China/ ; }, mesh = {Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; Aging ; *Bacteria/classification/genetics/isolation &amp; purification ; *Face/microbiology ; High-Throughput Nucleotide Sequencing ; Metagenome ; *Microbiota ; Sebum/metabolism ; *Skin/microbiology ; *Skin Aging/physiology ; }, abstract = {BACKGROUND: Our facial skin hosts millions of microorganisms, primarily bacteria, crucial for skin health by maintaining the physical barrier, modulating immune response, and metabolizing bioactive materials. Aging significantly influences the composition and function of the facial microbiome, impacting skin immunity, hydration, and inflammation, highlighting potential avenues for interventions targeting aging-related facial microbes amidst changes in skin physiological properties.<br><br>RESULTS: We conducted a multi-center and deep sequencing survey to investigate the intricate interplay of aging, skin physio-optical conditions, and facial microbiome. Leveraging a newly-generated dataset of 2737 species-level metagenome-assembled genomes (MAGs), our integrative analysis highlighted aging as the primary driver, influencing both facial microbiome composition and key skin characteristics, including moisture, sebum production, gloss, pH, elasticity, and sensitivity. Further mediation analysis revealed that skin characteristics significantly impacted the microbiome, mostly as a mediator of aging. Utilizing this dataset, we uncovered two consistent cutotypes across sampling cities and identified aging-related microbial MAGs. Additionally, a Facial Aging Index (FAI) was formulated based on the microbiome, uncovering the cutotype-dependent effects of unhealthy lifestyles on skin aging. Finally, we distinguished aging related microbial pathways influenced by lifestyles with cutotype-dependent effect.<br><br>CONCLUSIONS: Together, our findings emphasize aging's central role in facial microbiome dynamics, and support personalized skin microbiome interventions by targeting lifestyle, skin properties, and aging-related microbial factors. Video Abstract.}, }
@article {pmid39232318, year = {2024}, author = {Yadav, P and Kumari, SP and Hooda, S and Gupta, RK and Diwan, P}, title = {Comparative assessment of microbiome and resistome of influent and effluent of sewage treatment plant and common effluent treatment plant located in Delhi, India using shotgun approach.}, journal = {Journal of environmental management}, volume = {369}, number = {}, pages = {122342}, doi = {10.1016/j.jenvman.2024.122342}, pmid = {39232318}, issn = {1095-8630}, mesh = {India ; *Microbiota ; *Sewage/microbiology ; *Wastewater/microbiology ; Drug Resistance, Microbial/genetics ; Bacteria/genetics/drug effects ; Waste Disposal, Fluid ; }, abstract = {Antimicrobial resistance (AMR) is a significant threat that demands surveillance to identify and analyze trends of the emerging antibiotic resistance genes (ARGs) and potential microbial carriers. The influent of the wastewater treatment plants (WWTPs) reflects the microbes derived from the population and effluent being the source of dissemination of potential pathogenic microbes and AMR. The present study aimed to monitor microbial communities and antibiotic resistance genes in WWTPs employing a whole metagenome shotgun sequencing approach. The samples were collected from a sewage treatment plant (STP) and a common effluent treatment plant (CETP) in Delhi, India. The results showed the influent of STP to be rich in Bifidobacterium, Bacteroides, Escherichia, Arcobacter, and Pseudomonas residents of gut microbiota and known to cause diseases in humans and animals; whereas the CETP sample was abundant in Aeromonas, Escherichia, and Shewanella known to be involved in the degradation of different compounds. Interestingly, the effluent samples from both STPs and CETP were rich in microbial diversity, comprising organic and xenobiotic compound degrading and disease-causing bacteria, indicating the effluent being the source of dissemination of concerning bacteria to the environment. The functional profile at both sites displayed similarity with an abundance of housekeeping function genes as analyzed by Clusters of Orthologous Genes (COG), KEGG Orthology (KO), and subsystem databases. Resistome profiling by MEGARes showed the dominance of ARGs corresponding to beta-lactams having relative abundance ranging from 16% to 34% in all the metagenome datasets, followed by tetracycline (8%-16%), aminoglycosides (7%-9%), multi-drug (5%-9%), and rifampin (3%-9%). Also, AMR genes oxa, ant3-DPRIME, and rpoB, which are of clinical importance were predominantly and most prevalently present in all the samples. The presence of AMR in effluents from both types of treatment plants indicates that wastewater from both sources contributes to the spread of pathogenic bacteria and resistance genes, increasing the environmental AMR burden and therefore requires tertiary treatment before discharge. This work will facilitate further research towards the identification of suitable biomarkers for monitoring antibiotic resistance.}, }
@article {pmid39232160, year = {2024}, author = {Chen, J and Jia, Y and Sun, Y and Liu, K and Zhou, C and Liu, C and Li, D and Liu, G and Zhang, C and Yang, T and Huang, L and Zhuang, Y and Wang, D and Xu, D and Zhong, Q and Guo, Y and Li, A and Seim, I and Jiang, L and Wang, L and Lee, SMY and Liu, Y and Wang, D and Zhang, G and Liu, S and Wei, X and Yue, Z and Zheng, S and Shen, X and Wang, S and Qi, C and Chen, J and Ye, C and Zhao, F and Wang, J and Fan, J and Li, B and Sun, J and Jia, X and Xia, Z and Zhang, H and Liu, J and Zheng, Y and Liu, X and Wang, J and Yang, H and Kristiansen, K and Xu, X and Mock, T and Li, S and Zhang, W and Fan, G}, title = {Global marine microbial diversity and its potential in bioprospecting.}, journal = {Nature}, volume = {633}, number = {8029}, pages = {371-379}, pmid = {39232160}, issn = {1476-4687}, mesh = {Antimicrobial Cationic Peptides/genetics/isolation &amp; purification ; *Aquatic Organisms/classification/genetics/isolation &amp; purification ; Archaea/genetics/classification ; Bacteria/genetics/classification ; *Biodiversity ; Biomedical Technology ; *Bioprospecting/trends ; Biotechnology ; CRISPR-Associated Protein 9/genetics/isolation &amp; purification ; CRISPR-Cas Systems/genetics ; Drug Resistance, Bacterial/genetics ; Genome, Archaeal/genetics ; Genome, Bacterial/genetics ; *Geographic Mapping ; *Metagenome/genetics ; Oceans and Seas ; Phylogeny ; Seawater/microbiology ; Water Microbiology ; }, abstract = {The past two decades has witnessed a remarkable increase in the number of microbial genomes retrieved from marine systems[1,2]. However, it has remained challenging to translate this marine genomic diversity into biotechnological and biomedical applications[3,4]. Here we recovered 43,191 bacterial and archaeal genomes from publicly available marine metagenomes, encompassing a wide range of diversity with 138 distinct phyla, redefining the upper limit of marine bacterial genome size and revealing complex trade-offs between the occurrence of CRISPR-Cas systems and antibiotic resistance genes. In silico bioprospecting of these marine genomes led to the discovery of a novel CRISPR-Cas9 system, ten antimicrobial peptides, and three enzymes that degrade polyethylene terephthalate. In vitro experiments confirmed their effectiveness and efficacy. This work provides evidence that global-scale sequencing initiatives advance our understanding of how microbial diversity has evolved in the oceans and is maintained, and demonstrates how such initiatives can be sustainably exploited to advance biotechnology and biomedicine.}, }
@article {pmid39232089, year = {2024}, author = {Melo, T and Sousa, CA and Delacour-Estrella, S and Bravo-Barriga, D and Seixas, G}, title = {Characterization of the microbiome of Aedes albopictus populations in different habitats from Spain and São Tomé.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {20545}, pmid = {39232089}, issn = {2045-2322}, mesh = {Animals ; *Aedes/microbiology ; Spain ; *Microbiota ; *Wolbachia/genetics/isolation &amp; purification/physiology ; Female ; *RNA, Ribosomal, 16S/genetics ; Mosquito Vectors/microbiology ; Ecosystem ; Male ; }, abstract = {The mosquito microbiome significantly influences vector competence, including in Aedes albopictus, a globally invasive vector. Describing the microbiome and Wolbachia strains of Ae. albopictus from different regions can guide area-specific control strategies. Mosquito samples from Spain and São Tomé were analyzed using 16S rRNA gene sequencing and metagenomic sequencing. Wolbachia infection patterns were observed by sex and population. Female mosquitoes were blood-fed, a factor considered in analyzing their microbiota. Results revealed a dominance of dual Wolbachia infections, strains A and B, in the microbiome of both populations of Ae. albopictus, especially among females. Both populations shared a core microbiome, although 5 and 9 other genera were only present in Spain and São Tomé populations, respectively. Genera like Pelomonas and Nevskia were identified for the first time in Aedes mosquitoes. This study is the first to describe the Ae. albopictus bacteriome in Spain and São Tomé, offering insights for the development of targeted mosquito control strategies. Understanding the specific microbiome composition can help in designing more effective interventions, such as microbiome manipulation and Wolbachia-based approaches, to reduce vector competence and transmission potential of these mosquitoes.}, }
@article {pmid39230701, year = {2024}, author = {Hera, MR and Liu, S and Wei, W and Rodriguez, JS and Ma, C and Koslicki, D}, title = {Metagenomic functional profiling: to sketch or not to sketch?.}, journal = {Bioinformatics (Oxford, England)}, volume = {40}, number = {Suppl 2}, pages = {ii165-ii173}, pmid = {39230701}, issn = {1367-4811}, support = {R01 GM146462/GM/NIGMS NIH HHS/United States ; R01GM146462/GF/NIH HHS/United States ; }, mesh = {*Metagenomics/methods ; *Software ; *Algorithms ; *Metagenome/genetics ; Humans ; Microbiota/genetics ; Databases, Genetic ; }, abstract = {MOTIVATION: Functional profiling of metagenomic samples is essential to decipher the functional capabilities of microbial communities. Traditional and more widely used functional profilers in the context of metagenomics rely on aligning reads against a known reference database. However, aligning sequencing reads against a large and fast-growing database is computationally expensive. In general, k-mer-based sketching techniques have been successfully used in metagenomics to address this bottleneck, notably in taxonomic profiling. In this work, we describe leveraging FracMinHash (implemented in sourmash, a publicly available software), a k-mer-sketching algorithm, to obtain functional profiles of metagenome samples.<br><br>RESULTS: We show how pieces of the sourmash software (and the resulting FracMinHash sketches) can be put together in a pipeline to functionally profile a metagenomic sample. We named our pipeline fmh-funprofiler. We report that the functional profiles obtained using this pipeline demonstrate comparable completeness and better purity compared to the profiles obtained using other alignment-based methods when applied to simulated metagenomic data. We also report that fmh-funprofiler is 39-99&#xd7; faster in wall-clock time, and consumes up to 40-55&#xd7; less memory. Coupled with the KEGG database, this method not only replicates fundamental biological insights but also highlights novel signals from the Human Microbiome Project datasets.<br><br>This fast and lightweight metagenomic functional profiler is freely available and can be accessed here: https://github.com/KoslickiLab/fmh-funprofiler. All scripts of the analyses we present in this manuscript can be found on GitHub.}, }
@article {pmid39230261, year = {2024}, author = {Tu, V and Ren, Y and Tanes, C and Mukhopadhyay, S and Daniel, SG and Li, H and Bittinger, K}, title = {A quantitative approach to measure and predict microbiome response to antibiotics.}, journal = {mSphere}, volume = {9}, number = {9}, pages = {e0048824}, pmid = {39230261}, issn = {2379-5042}, support = {SAP # 4100068710//Pennsylvania Department of Health (PA DOH)/ ; //Children's Hospital of Philadelphia (CHOP)/ ; }, mesh = {Humans ; *Anti-Bacterial Agents/pharmacology ; *Microbiota/drug effects/genetics ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/drug effects/genetics/classification ; Gastrointestinal Microbiome/drug effects/genetics ; Metagenomics/methods ; Microbial Sensitivity Tests/methods ; Skin/microbiology ; Mouth/microbiology ; Software ; }, abstract = {UNLABELLED: Although antibiotics induce sizable perturbations in the human microbiome, we lack a systematic and quantitative method to measure and predict the microbiome's response to specific antibiotics. Here, we introduce such a method, which takes the form of a microbiome response index (MiRIx) for each antibiotic. Antibiotic-specific MiRIx values quantify the overall susceptibility of the microbiota to an antibiotic, based on databases of bacterial phenotypes and published data on intrinsic antibiotic susceptibility. We applied our approach to five published microbiome studies that carried out antibiotic interventions with vancomycin, metronidazole, ciprofloxacin, amoxicillin, and doxycycline. We show how MiRIx can be used in conjunction with existing microbiome analytical approaches to gain a deeper understanding of the microbiome response to antibiotics. Finally, we generate antibiotic response predictions for the oral, skin, and gut microbiome in healthy humans. Our approach is implemented as open-source software and is readily applied to microbiome data sets generated by 16S rRNA marker gene sequencing or shotgun metagenomics.<br><br>IMPORTANCE: Antibiotics are potent influencers of the human microbiome and can be a source for enduring dysbiosis and antibiotic resistance in healthcare. Existing microbiome data analysis methods can quantify perturbations of bacterial communities but cannot evaluate whether the differences are aligned with the expected activity of a specific antibiotic. Here, we present a novel method to quantify and predict antibiotic-specific microbiome changes, implemented in a ready-to-use software package. This has the potential to be a critical tool to broaden our understanding of the relationship between the microbiome and antibiotics.}, }
@article {pmid39230075, year = {2024}, author = {Kim, N and Kim, CY and Ma, J and Yang, S and Park, DJ and Ha, SJ and Belenky, P and Lee, I}, title = {MRGM: an enhanced catalog of mouse gut microbial genomes substantially broadening taxonomic and functional landscapes.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2393791}, pmid = {39230075}, issn = {1949-0984}, support = {R01 DK125382/DK/NIDDK NIH HHS/United States ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; Mice ; *Bacteria/classification/genetics/isolation &amp; purification ; *Genome, Bacterial ; Humans ; Phylogeny ; Diet ; }, abstract = {Mouse gut microbiome research is pivotal for understanding the human gut microbiome, providing insights into disease modeling, host-microbe interactions, and the dietary influence on the gut microbiome. To enhance the translational value of mouse gut microbiome studies, we need detailed and high-quality catalogs of mouse gut microbial genomes. We introduce the Mouse Reference Gut Microbiome (MRGM), a comprehensive catalog with 42,245 non-redundant mouse gut bacterial genomes across 1,524 species. MRGM marks a 40% increase in the known taxonomic diversity of mouse gut microbes, capturing previously underrepresented lineages through refined genome quality assessment techniques. MRGM not only broadens the taxonomic landscape but also enriches the functional landscape of the mouse gut microbiome. Using deep learning, we have elevated the Gene Ontology annotation rate for mouse gut microbial proteins from 3.2% with orthology to 60%, marking an over 18-fold increase. MRGM supports both DNA- and marker-based taxonomic profiling by providing custom databases, surpassing previous catalogs in performance. Finally, taxonomic and functional comparisons between human and mouse gut microbiota reveal diet-driven divergences in their taxonomic composition and functional enrichment. Overall, our study highlights the value of high-quality microbial genome catalogs in advancing our understanding of the co-evolution between gut microbes and their host.}, }
@article {pmid39227168, year = {2024}, author = {Salmaso, N and Cerasino, L and Pindo, M and Boscaini, A}, title = {Taxonomic and functional metagenomic assessment of a Dolichospermum bloom in a large and deep lake south of the Alps.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {10}, pages = {}, pmid = {39227168}, issn = {1574-6941}, support = {CN00000033//European Union/ ; }, mesh = {*Lakes/microbiology ; *Metagenomics ; *Metagenome ; *Phylogeny ; Eutrophication ; Cyanobacteria/genetics/classification/growth &amp; development/metabolism ; Aphanizomenon/genetics/growth &amp; development/metabolism ; }, abstract = {Untargeted genetic approaches can be used to explore the high metabolic versatility of cyanobacteria. In this context, a comprehensive metagenomic shotgun analysis was performed on a population of Dolichospermum lemmermannii collected during a surface bloom in Lake Garda in the summer of 2020. Using a phylogenomic approach, the almost complete metagenome-assembled genome obtained from the analysis allowed to clarify the taxonomic position of the species within the genus Dolichospermum and contributed to frame the taxonomy of this genus within the ADA group (Anabaena/Dolichospermum/Aphanizomenon). In addition to common functional traits represented in the central metabolism of photosynthetic cyanobacteria, the genome annotation uncovered some distinctive and adaptive traits that helped define the factors that promote and maintain bloom-forming heterocytous nitrogen-fixing Nostocales in oligotrophic lakes. In addition, genetic clusters were identified that potentially encode several secondary metabolites that were previously unknown in the populations evolving in the southern Alpine Lake district. These included geosmin, anabaenopetins, and other bioactive compounds. The results expanded the knowledge of the distinctive competitive traits that drive algal blooms and provided guidance for more targeted analyses of cyanobacterial metabolites with implications for human health and water resource use.}, }
@article {pmid39226954, year = {2024}, author = {Zhang, Z and Yang, H and Linghu, M and Li, J and Chen, C and Wang, B}, title = {Cattle manure composting driven by a microbial agent: A coupled mechanism involving microbial community succession and organic matter conversion.}, journal = {The Science of the total environment}, volume = {952}, number = {}, pages = {175953}, doi = {10.1016/j.scitotenv.2024.175953}, pmid = {39226954}, issn = {1879-1026}, mesh = {*Composting ; *Manure/microbiology ; Animals ; Cattle ; Microbiota ; Soil Microbiology ; Bacillus/physiology ; }, abstract = {Aerobic composting has been used as a mainstream treatment technology for agricultural solid waste resourcing. In the present study, we investigated the effects and potential mechanisms of the addition of a microbial agent (LD) prepared by combining Bacillus subtilis, Bacillus paralicheniformis and Irpex lacteus in improving the efficiency of cattle manure composting. Our results showed that addition of 1.5 % LD significantly accelerated compost humification, i.e., the germination index and lignocellulose degradation rate of the final compost product reached values of 92.20 and 42.29 %, respectively. Metagenomic sequencing results showed that inoculation of cattle manure with LD increased the abundance of functional microorganisms. LD effectively promoted the production of humus precursors, which then underwent reactions through synergistic abiotic and biotic pathways to achieve compost humification. This research provides a theoretical basis for the study of microbial enhancement strategies and humus formation mechanisms in the composting of livestock manure.}, }
@article {pmid39226940, year = {2024}, author = {Wang, M and Li, Y and Peng, H and Liu, K and Wang, X and Xiang, W}, title = {A cyclic shift-temperature operation method to train microbial communities of mesophilic anaerobic digestion.}, journal = {Bioresource technology}, volume = {412}, number = {}, pages = {131410}, doi = {10.1016/j.biortech.2024.131410}, pmid = {39226940}, issn = {1873-2976}, mesh = {Anaerobiosis ; *Temperature ; *Biofuels/microbiology ; Bioreactors/microbiology ; Methane/metabolism ; Methanosarcina/metabolism ; Microbiota/physiology ; }, abstract = {Temperature is the critical factor affecting the efficiency and cost of anaerobic digestion (AD). The current work develops a shift-temperature AD (STAD) between 35 °C and 55 °C, intending to optimise microbial community and promote substrate conversion. The experimental results showed that severe inhibition of biogas production occurred when the temperature was firstly increased stepwise from 35 °C to 50 °C, whereas no inhibition was observed at the second warming cycle. When the organic load rate was increased to 6.37 g VS/L/d, the biogas yield of the STAD reached about 400 mL/g VS, nearly double that of the constant-temperature AD (CTAD). STAD promoted the proliferation of Methanosarcina (up to 57.32 %), while severely suppressed hydrogenophilic methanogens. However, when the temperature was shifted to 35 °C, most suppressed species recovered quickly and the excess propionic acid was quickly consumed. Metagenomic analysis showed that STAD also promoted gene enrichment related to pathways metabolism, membrane functions, and methyl-based methanogenesis.}, }
@article {pmid39225513, year = {2024}, author = {Han, K and Kuo, B and Khalili, H and Staller, K}, title = {Metagenomics Analysis Reveals Unique Gut Microbiota Signature of Slow-Transit Constipation.}, journal = {Clinical and translational gastroenterology}, volume = {15}, number = {10}, pages = {e1}, pmid = {39225513}, issn = {2155-384X}, support = {K23 DK120945/DK/NIDDK NIH HHS/United States ; KSN2022210 and KSN2211010//Korea Institute of Oriental Medicine/ ; K23 DK120945/DK/NIDDK NIH HHS/United States ; }, mesh = {Humans ; *Constipation/microbiology ; Female ; *Gastrointestinal Microbiome/genetics ; Middle Aged ; *Metagenomics/methods ; Male ; Case-Control Studies ; Adult ; Feces/microbiology ; Aged ; Gastrointestinal Transit ; Bile Acids and Salts/metabolism ; Bacteria/genetics/isolation &amp; purification/classification ; }, abstract = {INTRODUCTION: Altered gut microbiota may play a role in slow-transit constipation (STC). We conducted a study of gut microbiota composition and functionality in STC using metagenomic analyses.<br><br>METHODS: We assembled a clinical cohort of 24 patients with STC physiology age- and sex-matched to 24 controls. We performed shotgun metagenomic sequencing followed by prediction of metabolite composition from functional profiles.<br><br>RESULTS: In a middle-aged (mean 55.3 years), predominantly female cohort, there were no significant differences in &#x3b1;-diversity indices, but permutational multivariate analysis of variance analysis showed significant between-group differences (R 2 = 0.050, P < 0.001) between STC patients and controls. Gordonibacter pamelaeae , Bifidobacterium longum , Firmicutes bacterium co-abundance gene group 94, and Anaerotruncus colihominis were more abundant in STC, whereas Coprococcus comes and Roseburia intestinalis were more abundant in controls. Gut-derived metabolites varying in STC relative to controls were related to bile acid and cholesterol metabolism.<br><br>DISCUSSION: We found a unique metagenomic and metabolomic signature of STC.}, }
@article {pmid39222347, year = {2024}, author = {Glendinning, L and Wu, Z and Vervelde, L and Watson, M and Balic, A}, title = {Infectious bronchitis virus vaccination, but not the presence of XCR1, is correlated with large differences in chicken caecal microbiota.}, journal = {Microbial genomics}, volume = {10}, number = {9}, pages = {}, pmid = {39222347}, issn = {2057-5858}, mesh = {Animals ; *Chickens/microbiology ; *Infectious bronchitis virus/immunology/genetics ; *Cecum/microbiology ; *Gastrointestinal Microbiome ; Vaccination ; Poultry Diseases/microbiology/virology/immunology ; Coronavirus Infections/veterinary/prevention &amp; control/immunology ; Viral Vaccines/immunology/genetics ; Receptors, G-Protein-Coupled/genetics ; Metagenome ; Dendritic Cells/immunology ; Bacteria/classification/genetics ; Metagenomics ; }, abstract = {The chicken immune system and microbiota play vital roles in maintaining gut homeostasis and protecting against pathogens. In mammals, XCR1+ conventional dendritic cells (cDCs) are located in the gut-draining lymph nodes and play a major role in gut homeostasis. These cDCs sample antigens in the gut luminal contents and limit the inflammatory response to gut commensal microbes by generating appropriate regulatory and effector T-cell responses. We hypothesized that these cells play similar roles in sustaining gut homeostasis in chickens, and that chickens lacking XCR1 were likely to contain a dysbiotic caecal microbiota. Here we compare the caecal microbiota of chickens that were either heterozygous or homozygous XCR1 knockouts, that had or had not been vaccinated for infectious bronchitis virus (IBV). We used short-read (Illumina) and long-read (PacBio HiFi) metagenomic sequencing to reconstruct 670 high-quality, strain-level metagenome assembled genomes. We found no significant differences between alpha diversity or the abundance of specific microbial taxa between genotypes. However, IBV vaccination was found to correlate with significant differences in the richness and beta diversity of the microbiota, and to the abundance of 40 bacterial genera. In conclusion, we found that a lack of XCR1 was not correlated with significant changes in the chicken microbiota, but IBV vaccination was.}, }
@article {pmid39222062, year = {2024}, author = {Acheampong, DA and Jenjaroenpun, P and Wongsurawat, T and Kurilung, A and Pomyen, Y and Kandel, S and Kunadirek, P and Chuaypen, N and Kusonmano, K and Nookaew, I}, title = {CAIM: coverage-based analysis for identification of microbiome.}, journal = {Briefings in bioinformatics}, volume = {25}, number = {5}, pages = {}, pmid = {39222062}, issn = {1477-4054}, support = {P20 GM125503/GM/NIGMS NIH HHS/United States ; R01 CA143130/CA/NCI NIH HHS/United States ; P20GM125503//National Institute of General Medical Sciences of the National Institutes of Health/ ; R01CA143130/NH/NIH HHS/United States ; }, mesh = {Humans ; *Microbiota/genetics ; *Metagenomics/methods ; Computational Biology/methods ; Metagenome ; High-Throughput Nucleotide Sequencing/methods ; Software ; Algorithms ; Sequence Analysis, DNA/methods ; }, abstract = {Accurate taxonomic profiling of microbial taxa in a metagenomic sample is vital to gain insights into microbial ecology. Recent advancements in sequencing technologies have contributed tremendously toward understanding these microbes at species resolution through a whole shotgun metagenomic approach. In this study, we developed a new bioinformatics tool, coverage-based analysis for identification of microbiome (CAIM), for accurate taxonomic classification and quantification within both long- and short-read metagenomic samples using an alignment-based method. CAIM depends on two different containment techniques to identify species in metagenomic samples using their genome coverage information to filter out false positives rather than the traditional approach of relative abundance. In addition, we propose a nucleotide-count-based abundance estimation, which yield lesser root mean square error than the traditional read-count approach. We evaluated the performance of CAIM on 28 metagenomic mock communities and 2 synthetic datasets by comparing it with other top-performing tools. CAIM maintained a consistently good performance across datasets in identifying microbial taxa and in estimating relative abundances than other tools. CAIM was then applied to a real dataset sequenced on both Nanopore (with and without amplification) and Illumina sequencing platforms and found high similarity of taxonomic profiles between the sequencing platforms. Lastly, CAIM was applied to fecal shotgun metagenomic datasets of 232 colorectal cancer patients and 229 controls obtained from 4 different countries and 44 primary liver cancer patients and 76 controls. The predictive performance of models using the genome-coverage cutoff was better than those using the relative-abundance cutoffs in discriminating colorectal cancer and primary liver cancer patients from healthy controls with a highly confident species markers.}, }
@article {pmid39221872, year = {2025}, author = {Wang, Z and Xu, M and Li, Q and Lu, S and Liu, Z}, title = {Subchronic Chloroform Exposure Causes Intestinal Damage and Induces Gut Microbiota Disruption and Metabolic Dysregulation in Mice.}, journal = {Environmental toxicology}, volume = {40}, number = {1}, pages = {5-18}, doi = {10.1002/tox.24417}, pmid = {39221872}, issn = {1522-7278}, support = {LH2021C095//Natural Science Foundation of Heilongjiang Province of China/ ; 1452TD008//Heilongjiang Provincial Department of Education filing project/ ; 1451TD002//Heilongjiang Provincial Department of Education filing project/ ; }, mesh = {Animals ; *Chloroform/toxicity ; *Gastrointestinal Microbiome/drug effects ; Female ; Mice ; Cecum/microbiology/drug effects ; Intestines/drug effects/microbiology/pathology ; Environmental Pollutants/toxicity ; }, abstract = {Chloroform is a prevalent toxic environmental pollutant in urban settings, posing risks to human health through exposure via various mediums such as air and tap water. The gut microbiota plays a pivotal role in maintaining host health. However, there is a paucity of research elucidating the impact of chloroform exposure on the gut microbiota. In this investigation, 18 SPF Kunming female mice were stratified into three groups (n = 6) and subjected to oral gavage with chloroform doses equivalent to 0, 50, and 150 mg/kg of body weight over 30 days. Our findings demonstrate that subchronic chloroform exposure significantly perturbs hematological parameters in mice and induces histopathological alterations in cecal tissues, consequently engendering marked disparities in the functional composition of cecal microbiota and metabolic equilibrium of cecal contents. Ultimately, our investigation revealed a statistically robust correlation, exhibiting a high degree of significance, between the intestinal microbiome composition and the metabolites that were differentially expressed consequent to chloroform exposure.}, }
@article {pmid39218875, year = {2024}, author = {Liwinski, T and Auer, MK and Schröder, J and Pieknik, I and Casar, C and Schwinge, D and Henze, L and Stalla, GK and Lang, UE and von Klitzing, A and Briken, P and Hildebrandt, T and Desbuleux, JC and Biedermann, SV and Holterhus, PM and Bang, C and Schramm, C and Fuss, J}, title = {Gender-affirming hormonal therapy induces a gender-concordant fecal metagenome transition in transgender individuals.}, journal = {BMC medicine}, volume = {22}, number = {1}, pages = {346}, pmid = {39218875}, issn = {1741-7015}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; *Feces/microbiology ; *Gastrointestinal Microbiome/drug effects/genetics ; Metagenome ; Prospective Studies ; *Transgender Persons ; Gender-Affirming Procedures/methods ; Gonadal Steroid Hormones/administration &amp; dosage ; }, abstract = {BACKGROUND: Limited data exists regarding gender-specific microbial alterations during gender-affirming hormonal therapy (GAHT) in transgender individuals. This study aimed to investigate the nuanced impact of sex steroids on gut microbiota taxonomy and function, addressing this gap. We prospectively analyzed gut metagenome changes associated with 12 weeks of GAHT in trans women and trans men, examining both taxonomic and functional shifts.<br><br>METHODS: Thirty-six transgender individuals (17 trans women, 19 trans men) provided pre- and post-GAHT stool samples. Shotgun metagenomic sequencing was used to assess the changes in gut microbiota structure and potential function following GAHT.<br><br>RESULTS: While alpha and beta diversity remained unchanged during transition, specific species, including Parabacteroides goldsteinii and Escherichia coli, exhibited significant abundance shifts aligned with affirmed gender. Overall functional metagenome analysis showed a statistically significant effect of gender and transition (R[2]&#x2009;=&#x2009;4.1%, P&#x2009;=&#x2009;0.0115), emphasizing transitions aligned with affirmed gender, particularly in fatty acid-related metabolism.<br><br>CONCLUSIONS: This study provides compelling evidence of distinct taxonomic and functional profiles in the gut microbiota between trans men and women. GAHT induces androgenization in trans men and feminization in trans women, potentially impacting physiological and health-related outcomes.<br><br>TRIAL REGISTRATION: Clinicaltrials.gov NCT02185274.}, }
@article {pmid39218360, year = {2024}, author = {Park, DG and Kang, W and Shin, IJ and Chalita, M and Oh, HS and Hyun, DW and Kim, H and Chun, J and An, YS and Lee, EJ and Yoon, JH}, title = {Difference in gut microbial dysbiotic patterns between body-first and brain-first Parkinson's disease.}, journal = {Neurobiology of disease}, volume = {201}, number = {}, pages = {106655}, doi = {10.1016/j.nbd.2024.106655}, pmid = {39218360}, issn = {1095-953X}, mesh = {Humans ; *Parkinson Disease/microbiology/metabolism ; *Gastrointestinal Microbiome/physiology ; Male ; Female ; Cross-Sectional Studies ; Aged ; Middle Aged ; *Dysbiosis/microbiology ; REM Sleep Behavior Disorder/microbiology ; Brain/metabolism/microbiology ; }, abstract = {BACKGROUND: This study aims to identify distinct microbial and functional biomarkers characteristic of body-first or brain-first subtypes of Parkinson's disease (PD). This could illuminate the unique pathogenic mechanisms within these subtypes.<br><br>METHODS: In this cross-sectional study, we classified 36 well-characterized PD patients into body-first, brain-first, or undetermined subtypes based on the presence of premotor REM sleep behavior disorder (RBD) and cardiac meta-iodobenzylguanidine (MIBG) uptake. We then conducted an in-depth shotgun metagenomic analysis of the gut microbiome for each subtype and compared the results with those from age- and sex-matched healthy controls.<br><br>RESULTS: Significant differences were found in the gut microbiome of body-first PD patients (n&#xa0;=&#xa0;15) compared to both brain-first PD patients (n&#xa0;=&#xa0;9) and healthy controls. The gut microbiome in body-first PD showed a distinct profile, characterized by an increased presence of Escherichia coli and Akkermansia muciniphila, and a decreased abundance of short-chain fatty acid-producing commensal bacteria. These shifts were accompanied by a higher abundance of microbial genes associated with curli protein biosynthesis and a lower abundance of genes involved in putrescine and spermidine biosynthesis. Furthermore, the combined use of premotor RBD and MIBG criteria was more strongly correlated with these microbiome differences than the use of each criterion independently.<br><br>CONCLUSIONS: Our findings highlight the significant role of dysbiotic and pathogenic gut microbial alterations in body-first PD, supporting the body-first versus brain-first hypothesis. These insights not only reinforce the gut microbiome's potential as a therapeutic target in PD but also suggest the possibility of developing subtype-specific treatment strategies.}, }
@article {pmid39217664, year = {2024}, author = {Yu, Y and Wei, R and Yi, S and Teng, Y and Ning, R and Wei, S and Bai, L and Liu, H and Li, L and Xu, H and Han, C}, title = {Research Note: Integrative analysis of transcriptome and gut microbiome reveals foie gras capacity difference between cage and floor rearing systems.}, journal = {Poultry science}, volume = {103}, number = {11}, pages = {104248}, pmid = {39217664}, issn = {1525-3171}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Geese ; *Transcriptome ; *Animal Husbandry/methods ; Housing, Animal ; Liver/metabolism ; Lipid Metabolism ; Male ; Gene Expression Profiling/veterinary ; }, abstract = {To explore the differences in foie gras performance between geese raised in cages and on the ground, we conducted an integrative analysis of liver transcriptome and gut microbial metagenomes. The results showed extremely significant differences in the liver weight (P < 0.01) and liver lipid accumulation of FRS and CRS groups. The levels of triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) of CRS were significantly higher than those of FRS (P < 0.05). Transcriptome analysis showed that 3,917 upregulated and 1,395 downregulated genes were identified, and lipid metabolism pathway and fatty acid metabolism were significantly enriched. Analysis of cecum microbiota revealed that several inflammation-related bacteria (including Gallibacterium, Escherichia-Shigella, Desulfovibrio, Alistipes, and Fournierella) were enriched in CRS, while beneficial bacteria (including Lactobacillus, Limosilactobacillus, and Ligilactobacillus) were significantly enriched in FRS. In conclusion, CRS was better than FRS in foie gras production, which was more conducive to lipid deposition in the goose liver.}, }
@article {pmid39217389, year = {2024}, author = {Zhang, Y and Cheng, TY and Liu, GH and Liu, L and Duan, DY}, title = {Metagenome reveals the midgut microbial community of Haemaphysalis qinghaiensis ticks collected from yaks and Tibetan sheep.}, journal = {Parasites &amp; vectors}, volume = {17}, number = {1}, pages = {370}, pmid = {39217389}, issn = {1756-3305}, support = {No. 31902294//the National Natural Science Foundation of China/ ; }, mesh = {Animals ; Sheep ; Cattle ; Female ; *Metagenome ; *Ixodidae/microbiology ; Gastrointestinal Microbiome ; Bacteria/classification/isolation &amp; purification/genetics ; Tick Infestations/veterinary/parasitology ; Sheep Diseases/microbiology/parasitology ; China ; Metagenomics ; Tibet ; Cattle Diseases/microbiology/parasitology ; }, abstract = {BACKGROUND: Haemaphysalis qinghaiensis is a tick species distributed only in China. Due to its ability to transmit a variety of pathogens, including species of the genera Anaplasma, Rickettsia, Babesia, and Theileria, it seriously endangers livestock husbandry. However, the microbial community of the midgut of H. qinghaiensis females collected from yaks and Tibetan sheep has not yet been characterized using metagenomic sequencing technology.<br><br>METHODS: Haemaphysalis qinghaiensis were collected from the skins of yaks and Tibetan sheep in Gansu Province, China. Genomic DNA was extracted from the midguts and midgut contents of fully engorged H. qinghaiensis females collected from the two hosts. Metagenomic sequencing technology was used to analyze the microbial community of the two groups.<br><br>RESULTS: Fifty-seven phyla, 483 genera, and 755 species were identified in the two groups of samples. The ticks from the two hosts harbored common and unique microorganisms. At the phylum level, the dominant common phyla were Proteobacteria, Firmicutes, and Mucoromycota. At the genus level, the dominant common genera were Anaplasma, Ehrlichia, and Pseudomonas. At the species level, bacteria including Anaplasma phagocytophilum, Ehrlichia minasensis, and Pseudomonas aeruginosa along with eukaryotes such as Synchytrium endobioticum and Rhizophagus irregularis, and viruses such as the orf virus, Alphadintovirus mayetiola, and Parasteatoda house spider adintovirus were detected in both groups. In addition, the midgut of H. qinghaiensis collected from yaks had unique microbial taxa including two phyla, eight genera, and 23 species. Unique microorganisms in the midgut of H. qinghaiensis collected from Tibetan sheep included two phyla, 14 genera, and 32 species. Kyoto Encyclopedia of Genes and Genomes enrichment analysis revealed that the functional genes of the microbiome of H. qinghaiensis were annotated to six pathways, and the metabolic pathways included 11 metabolic processes, in which the genes involved in carbohydrate metabolism were the most abundant, followed by the genes involved in lipid metabolism.<br><br>CONCLUSIONS: These findings indicate that most of the microbial species in the collected H. qinghaiensis ticks were the same in both hosts, but there were also slight differences. The analytical data from this study have enhanced our understanding of the midgut microbial composition of H. qinghaiensis collected from different hosts. The database of H. qinghaiensis microbe constructed from this study will lay the foundation for predicting tick-borne diseases. Furthermore, a comprehensive understanding of tick microbiomes will be useful for understanding vector competency and interactions with ticks and midgut microorganisms.}, }
@article {pmid39217229, year = {2024}, author = {Gyaltshen, Y and Ishii, Y and Charvet, S and Goetz, E and Maruyama, S and Kim, E}, title = {Molecular diversity of green-colored microbial mats from hot springs of northern Japan.}, journal = {Extremophiles : life under extreme conditions}, volume = {28}, number = {3}, pages = {43}, pmid = {39217229}, issn = {1433-4909}, support = {KAKENHI 17H05713//Japan Society for the Promotion of Science/ ; 19H04713//Japan Society for the Promotion of Science/ ; CAREER 1453639//Division of Integrative Organismal Systems/ ; }, mesh = {*Hot Springs/microbiology ; Japan ; RNA, Ribosomal, 16S/genetics ; Metagenome ; Microbiota ; Bacteria/genetics/classification/isolation &amp; purification ; Phylogeny ; }, abstract = {We acquired and analyzed metagenome and 16S/18S rRNA gene amplicon data of green-colored microbial mats from two hot springs within the Onikobe geothermal region (Miyagi Prefecture, Japan). The two collection sites-Tamago and Warabi-were in proximity and had the same temperature (40 °C), but the Tamago site was connected to a nearby stream, whereas the Warabi site was isolated. Both the amplicon and metagenome data suggest the bacterial, especially cyanobacterial, dominance of the mats; other abundant groups include Chloroflexota, Pseudomonadota, Bacteroidota/Chlorobiota, and Deinococcota. At finer resolution, however, the taxonomic composition entirely differed between the mats. A total of 5 and 21 abundant bacterial 16S rRNA gene OTUs were identified for Tamago and Warabi, respectively; of these, 12 are putative chlorophyll- or rhodopsin-based phototrophs. The presence of phylogenetically diverse microbial eukaryotes was noted, with ciliates and amoebozoans being the most abundant eukaryote groups for Tamago and Warabi, respectively. Fifteen metagenome-assembled genomes (MAGs) were obtained, represented by 13 bacteria, one ciliate (mitochondrion), and one giant virus. A total of 15 novel taxa, including a new deeply branching Chlorobiota species, is noted from the amplicon and MAG data, highlighting the importance of environmental sequencing in uncovering hidden microorganisms.}, }
@article {pmid39216995, year = {2024}, author = {Gekenidis, MT and Vollenweider, V and Joyce, A and Murphy, S and Walser, JC and Ju, F and Bürgmann, H and Hummerjohann, J and Walsh, F and Drissner, D}, title = {Unde venis? Bacterial resistance from environmental reservoirs to lettuce: tracking microbiome and resistome over a growth period.}, journal = {FEMS microbiology ecology}, volume = {100}, number = {10}, pages = {}, pmid = {39216995}, issn = {1574-6941}, support = {407240_167068//National Research Program "Antimicrobial Resistance"/ ; /SNSF_/Swiss National Science Foundation/Switzerland ; }, mesh = {*Lactuca/microbiology ; *Manure/microbiology ; Animals ; *Soil Microbiology ; *Microbiota/genetics ; *Bacteria/genetics/growth &amp; development/drug effects/classification/isolation &amp; purification ; *RNA, Ribosomal, 16S/genetics ; Drug Resistance, Bacterial/genetics ; Swine ; Plant Leaves/microbiology ; Wastewater/microbiology ; Water Microbiology ; Anti-Bacterial Agents/pharmacology ; Metagenomics ; Agricultural Irrigation ; Soil/chemistry ; Water Quality ; }, abstract = {Fresh produce is suggested to contribute highly to shaping the gut resistome. We investigated the impact of pig manure and irrigation water quality on microbiome and resistome of field-grown lettuce over an entire growth period. Lettuce was grown under four regimes, combining soil amendment with manure (with/without) with sprinkler irrigation using river water with an upstream wastewater input, disinfected by UV (with/without). Lettuce leaves, soil, and water samples were collected weekly and analysed by bacterial cultivation, 16S rRNA gene amplicon sequencing, and shotgun metagenomics from total community DNA. Cultivation yielded only few clinically relevant antibiotic-resistant bacteria (ARB), but numbers of ARB on lettuce increased over time, while no treatment-dependent changes were observed. Microbiome analysis confirmed a temporal trend. Antibiotic resistance genes (ARGs) unique to lettuce and water included multidrug and β-lactam ARGs, whereas lettuce and soil uniquely shared mainly glycopeptide and tetracycline ARGs. Surface water carried clinically relevant ARB (e.g. ESBL-producing Escherichia coli or Serratia fonticola) without affecting the overall lettuce resistome significantly. Resistance markers including biocide and metal resistance were increased in lettuce grown with manure, especially young lettuce (increased soil contact). Overall, while all investigated environments had their share as sources of the lettuce resistome, manure was the main source especially on young plants. We therefore suggest minimizing soil-vegetable contact to minimize resistance markers on fresh produce.}, }
@article {pmid39216617, year = {2025}, author = {Borrego, A and Koury Cabrera, WH and Souza, AT and Eto, SF and de Oliveira, SL and Rodrigues, J and Jensen, JR}, title = {Microbiota transfer early after birth modulates genetic susceptibility to chronic arthritis in mice.}, journal = {Microbes and infection}, volume = {27}, number = {2}, pages = {105411}, doi = {10.1016/j.micinf.2024.105411}, pmid = {39216617}, issn = {1769-714X}, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; *Genetic Predisposition to Disease ; *Arthritis, Experimental/genetics/microbiology ; Disease Models, Animal ; Female ; Terpenes ; *Arthritis/genetics/microbiology ; Mice, Inbred C57BL ; Bacteria/classification/genetics ; Male ; }, abstract = {Genetics is central to the susceptibility or resistance to autoimmunity, and mounting evidence indicates that the intestinal microbiota also plays an essential role. In murine arthritis models, short-chain fat acid supplementation reduces disease severity by modulating tryptophan-metabolizing bacteria. Common microbiota transfer methods modulate arthritis severity, however, they are not practical for chronic models such as pristane-induced arthritis (PIA). PIA-resistant (HIII) and PIA-susceptible (LIII) mice harbor diverse intestinal microbiomes, which might be implicated in their divergent susceptibility. To investigate this hypothesis, we used cross-fostering to stably transfer the microbiota. In this study, we show that extreme susceptibility to arthritis can be modulated by early microbiota transfer, with long-lasting effects. HIII and LIII pups were cross-fostered and injected with pristane after weaning. PIA severity in cross-fostered LIII mice was significantly reduced in the chronic phase. Metagenomic analyses showed that HIII and LIII microbiomes were partly shifted by cross-fostering. Microbial groups whose abundance was associated with either HIII or LIII mice presented similar composition in cross-fostered mice of the opposite strains, suggesting a role in PIA susceptibility. Identification of bacterial groups that modulate chronic arthritis will contribute novel insights on the pathogenesis of human rheumatoid arthritis and targets for replication and functional studies.}, }
@article {pmid39216430, year = {2024}, author = {Gupta, A and Shivachandran, A and Saleena, LM}, title = {Oral microbiome insights: Tracing acidic culprits in dental caries with functional metagenomics.}, journal = {Archives of oral biology}, volume = {168}, number = {}, pages = {106064}, doi = {10.1016/j.archoralbio.2024.106064}, pmid = {39216430}, issn = {1879-1506}, mesh = {*Dental Caries/microbiology ; Humans ; *Metagenomics/methods ; *Microbiota ; Mouth/microbiology ; Acids/metabolism ; Bacteria/classification/genetics ; DNA, Bacterial ; Sequence Analysis, DNA ; Male ; Female ; }, abstract = {OBJECTIVE: This study aimed to investigate the presence and abundance of acid-producing bacteria in dental caries samples using functional gene prediction techniques.<br><br>DESIGN: A total of 24 dental caries samples were collected for analysis. DNA isolation was performed followed by shotgun metagenomic sequencing. Functional gene prediction techniques were used to identify enzymes responsible for acid production from primary metabolites. Enzymes responsible for converting primary metabolites into acids were identified from the KEGG database. Subsequently, 840 contigs were examined, and their genus and species were characterized.<br><br>RESULTS: Analysis of the obtained data revealed 31 KEGG IDs corresponding to enzymes involved in the conversion of primary metabolites into acids. All 117 identified genera from the contig analysis were found to be part of the oral microbiome. In addition, A higher prevalence of acid-producing bacteria was noted in dental caries samples compared to earlier reports.<br><br>CONCLUSION: The study indicates the significant role of acid-producing bacteria in the initiation and progression of dental caries. The findings highlight the importance of microbial activity in the demineralization process of tooth enamel. Methods for preventing dental decay may be promising if specific measures are implemented to reduce the amount of acid produced by oral bacteria.}, }
@article {pmid39216241, year = {2024}, author = {Liao, X and Hou, L and Zhang, L and Grossart, HP and Liu, K and Liu, J and Chen, Y and Liu, Y and Hu, A}, title = {Distinct influences of altitude on microbiome and antibiotic resistome assembly in a glacial river ecosystem of Mount Everest.}, journal = {Journal of hazardous materials}, volume = {479}, number = {}, pages = {135675}, doi = {10.1016/j.jhazmat.2024.135675}, pmid = {39216241}, issn = {1873-3336}, mesh = {*Rivers/microbiology ; *Altitude ; *Microbiota/drug effects ; *Drug Resistance, Microbial/genetics ; Ecosystem ; Bacteria/genetics/drug effects/classification ; Geologic Sediments/microbiology ; Viruses/drug effects/genetics ; Anti-Bacterial Agents/pharmacology ; Ice Cover/microbiology ; China ; }, abstract = {The profound influences of altitude on aquatic microbiome were well documented. However, differences in the responses of different life domains (bacteria, microeukaryotes, viruses) and antibiotics resistance genes (ARGs) in glacier river ecosystems to altitude remain unknown. Here, we employed shotgun metagenomic and amplicon sequencing to characterize the altitudinal variations of microbiome and ARGs in the Rongbu River, Mount Everest. Our results indicated the relative influences of stochastic processes on microbiome and ARGs assembly in water and sediment were in the following order: microeukaryotes < ARGs < viruses < bacteria. Moreover, distinct assembly patterns of the microbiome and ARGs were found in response to differences in altitude, the latter of which shift from deterministic to stochastic processes with increasing differences in altitude. Partial least squares path modeling revealed that mobile genetic elements (MGEs) and viral β-diversity were the major factors influencing the ARG abundances. Taken together, our work revealed that altitude-caused environmental changes led to significant changes in the composition and assembly processes of the microbiome and ARGs, while ARGs had a unique response pattern to altitude. Our findings provide novel insights into the impacts of altitude on the biogeographic distribution of microbiome and ARGs, and the associated driving forces in glacier river ecosystems.}, }
@article {pmid39216231, year = {2024}, author = {Xu, J and Li, P and Li, Z and Liu, S and Guo, H and Lesser, CF and Ke, J and Zhao, W and Mou, X}, title = {Gut bacterial type III secretion systems aggravate colitis in mice and serve as biomarkers of Crohn's disease.}, journal = {EBioMedicine}, volume = {107}, number = {}, pages = {105296}, pmid = {39216231}, issn = {2352-3964}, mesh = {Animals ; Mice ; *Crohn Disease/microbiology/metabolism/pathology ; Humans ; *Biomarkers ; *Disease Models, Animal ; *Gastrointestinal Microbiome ; *Type III Secretion Systems/metabolism/genetics ; Colitis/microbiology/metabolism ; Metagenomics/methods ; Feces/microbiology ; Female ; Male ; }, abstract = {BACKGROUND: Mesenteric adipose tissue (mAT) hyperplasia, known as creeping fat, is a pathologic characteristic of Crohn's disease (CD). In our previously reported cohort, we observed that Achromobacter pulmonis was the most abundant and prevalent bacteria cultivated from creeping fat.<br><br>METHODS: A whole genomic sequencing and identification of T3SS orthologs of mAT-derived A. pulmonis were used. A functional type III secretion system (T3SS) mediated the pathogenic potential of A. pulmonis in&#xa0;vitro and in mouse colitis model. Furthermore, a T3SS Finder pipeline was introduced to evaluate gut bacterial T3SS orthologs in the feces of CD patients, ulcerative colitis and colorectal cancer patients.<br><br>FINDINGS: Here, we reveal that mAT-derived A. pulmonis possesses a functional T3SS, aggravates colitis in mice via T3SS, and exhibits T3SS-dependent cytotoxicity via a caspase-independent mechanism in macrophages and epithelial cells, which demonstrated the pathogenic potential of the T3SS-harboring A. pulmonis. Metagenomic analyses demonstrate an increased abundance of Achromobacter in the fecal of Crohn's disease patients compared to healthy controls. A comprehensive comparison of total microbial vT3SS abundance in various intestine diseases demonstrated that the specific enrichment of vT3SS genes was shown in fecal samples of CD, neither ulcerative colitis nor colorectal cancer patients, and ten T3SS gene-based biomarkers for CD were discovered and validated in a newly recruited CD cohort. Furthermore, treatment with exclusive enteral nutrition (EEN), an intervention that improves CD patient symptomatology, was found associated with a significant reduction in the prevalence of T3SS genes in fecal samples.<br><br>INTERPRETATION: These findings highlight the pathogenic significance of T3SSs in the context of CD and identify specific T3SS genes that could potentially function as biomarkers for diagnosing and monitoring the clinical status of CD patients.<br><br>FUNDING: This work is supported by the National Key Research and Development Program of China (2020YFA0907800), the China Postdoctoral Science Foundation (2023M744089), the National Natural Science Foundation of China (32000096), the Shenzhen Science and Technology Programs (KQTD20200820145822023, RCIC20231211085944057, and ZDSYS20220606100803007), National Key Clinical Discipline, Guangdong Provincial Clinical Research Center for Digestive Diseases (2020B1111170004), Qingfeng Scientific Research Fund of the China Crohn's &amp; Colitis Foundation (CCCF) (CCCF-QF-2022B71-1), and the Sixth Affiliated Hospital, Sun Yat-sen University Clinical Research 1010 Program 1010CG(2023)-08. These funding provided well support for this research work, which involved data collection, analysis, interpretation, patient recruitment and so on.}, }
@article {pmid39215755, year = {2024}, author = {Cannarozzi, AL and Latiano, A and Massimino, L and Bossa, F and Giuliani, F and Riva, M and Ungaro, F and Guerra, M and Brina, ALD and Biscaglia, G and Tavano, F and Carparelli, S and Fiorino, G and Danese, S and Perri, F and Palmieri, O}, title = {Inflammatory bowel disease genomics, transcriptomics, proteomics and metagenomics meet artificial intelligence.}, journal = {United European gastroenterology journal}, volume = {12}, number = {10}, pages = {1461-1480}, pmid = {39215755}, issn = {2050-6414}, support = {PNRR-MAD-2022-12375729//Italian Next Generation Eu Program/ ; }, mesh = {Humans ; *Artificial Intelligence ; Colitis, Ulcerative/genetics/immunology/microbiology/pathology ; Crohn Disease/genetics/immunology/microbiology/pathology ; Gastrointestinal Microbiome/immunology ; *Inflammatory Bowel Diseases/genetics/immunology/microbiology/pathology ; *Metagenomics/methods ; Precision Medicine/methods ; *Proteomics/methods ; Transcriptome ; Multiomics/methods ; }, abstract = {Various extrinsic and intrinsic factors such as drug exposures, antibiotic treatments, smoking, lifestyle, genetics, immune responses, and the gut microbiome characterize ulcerative colitis and Crohn's disease, collectively called inflammatory bowel disease (IBD). All these factors contribute to the complexity and heterogeneity of the disease etiology and pathogenesis leading to major challenges for the scientific community in improving management, medical treatments, genetic risk, and exposome impact. Understanding the interaction(s) among these factors and their effects on the immune system in IBD patients has prompted advances in multi-omics research, the development of new tools as part of system biology, and more recently, artificial intelligence (AI) approaches. These innovative approaches, supported by the availability of big data and large volumes of digital medical datasets, hold promise in better understanding the natural histories, predictors of disease development, severity, complications and treatment outcomes in complex diseases, providing decision support to doctors, and promising to bring us closer to the realization of the "precision medicine" paradigm. This review aims to provide an overview of current IBD omics based on both individual (genomics, transcriptomics, proteomics, metagenomics) and multi-omics levels, highlighting how AI can facilitate the integration of heterogeneous data to summarize our current understanding of the disease and to identify current gaps in knowledge to inform upcoming research in this field.}, }
@article {pmid39209868, year = {2024}, author = {Gonzalez, E and Lee, MD and Tierney, BT and Lipieta, N and Flores, P and Mishra, M and Beckett, L and Finkelstein, A and Mo, A and Walton, P and Karouia, F and Barker, R and Jansen, RJ and Green, SJ and Weging, S and Kelliher, J and Singh, NK and Bezdan, D and Galazska, J and Brereton, NJB}, title = {Spaceflight alters host-gut microbiota interactions.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {71}, pmid = {39209868}, issn = {2055-5008}, mesh = {*Gastrointestinal Microbiome ; Animals ; *Space Flight ; Mice ; *Bacteria/classification/genetics ; Liver/microbiology ; Host Microbial Interactions ; Metagenomics/methods ; Colon/microbiology ; Bile Acids and Salts/metabolism ; Energy Metabolism ; Male ; Humans ; Mice, Inbred C57BL ; }, abstract = {The ISS rodent habitat has provided crucial insights into the impact of spaceflight on mammals, inducing symptoms characteristic of liver disease, insulin resistance, osteopenia, and myopathy. Although these physiological responses can involve the microbiome on Earth, host-microbiota interactions during spaceflight are still being elucidated. We explore murine gut microbiota and host gene expression in the colon and liver after 29 and 56 days of spaceflight using multiomics. Metagenomics revealed significant changes in 44 microbiome species, including relative reductions in bile acid and butyrate metabolising bacteria like Extibacter muris and Dysosmobacter welbionis. Functional prediction indicate over-representation of fatty acid and bile acid metabolism, extracellular matrix interactions, and antibiotic resistance genes. Host gene expression described corresponding changes to bile acid and energy metabolism, and immune suppression. These changes imply that interactions at the host-gut microbiome interface contribute to spaceflight pathology and that these interactions might critically influence human health and long-duration spaceflight feasibility.}, }
@article {pmid39209853, year = {2024}, author = {Mi, J and Jing, X and Ma, C and Yang, Y and Li, Y and Zhang, Y and Long, R and Zheng, H}, title = {Massive expansion of the pig gut virome based on global metagenomic mining.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {76}, pmid = {39209853}, issn = {2055-5008}, mesh = {Animals ; Swine ; *Virome/genetics ; *Metagenomics/methods ; *Gastrointestinal Microbiome ; *Viruses/genetics/classification/isolation &amp; purification ; *Genome, Viral ; Data Mining ; Metagenome ; Phylogeny ; }, abstract = {The pig gut virome plays a vital role in the gut microbial ecosystem of pigs. However, a comprehensive understanding of their diversity and a reference database for the virome are currently lacking. To address this gap, we established a Pig Virome Database (PVD) that comprised of 5,566,804 viral contig sequences from 4650 publicly available gut metagenomic samples using a pipeline designated "metav". By clustering sequences, we identified 48,299 viral operational taxonomic units (vOTUs) genomes of at least medium quality, of which 92.83% of which were not found in existing major databases. The majority of vOTUs were identified as Caudoviricetes (72.21%). The PVD database contained a total of 2,362,631 protein-coding genes across the above medium-quality vOTUs genomes that can be used to explore the functional potential of the pig gut virome. These findings highlight the extensive diversity of viruses in the pig gut and provide a pivotal reference dataset for forthcoming research concerning the pig gut virome.}, }
@article {pmid39209850, year = {2024}, author = {Colman, DR and Keller, LM and Arteaga-Pozo, E and Andrade-Barahona, E and St Clair, B and Shoemaker, A and Cox, A and Boyd, ES}, title = {Covariation of hot spring geochemistry with microbial genomic diversity, function, and evolution.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7506}, pmid = {39209850}, issn = {2041-1723}, support = {80NSSC19M0150//National Aeronautics and Space Administration (NASA)/ ; 80NSSC19M0150//National Aeronautics and Space Administration (NASA)/ ; 80NSSC19M0150//National Aeronautics and Space Administration (NASA)/ ; 4069947046//National Aeronautics and Space Administration (NASA)/ ; 4069947046//National Aeronautics and Space Administration (NASA)/ ; 4069947046//National Aeronautics and Space Administration (NASA)/ ; 4069947046//National Aeronautics and Space Administration (NASA)/ ; }, mesh = {*Hot Springs/microbiology/chemistry ; *Metagenome ; *Phylogeny ; Bacteria/genetics/classification/metabolism ; Hydrogen-Ion Concentration ; Archaea/genetics/classification/metabolism ; Genome, Microbial ; Ecosystem ; Microbiota/genetics ; }, abstract = {The geosphere and the microbial biosphere have co-evolved for ~3.8 Ga, with many lines of evidence suggesting a hydrothermal habitat for life's origin. However, the extent that contemporary thermophiles and their hydrothermal habitats reflect those that likely existed on early Earth remains unknown. To address this knowledge gap, 64 geochemical analytes were measured and 1022 metagenome-assembled-genomes (MAGs) were generated from 34 chemosynthetic high-temperature springs in Yellowstone National Park and analysed alongside 444 MAGs from 35 published metagenomes. We used these data to evaluate co-variation in MAG taxonomy, metabolism, and phylogeny as a function of hot spring geochemistry. We found that cohorts of MAGs and their functions are discretely distributed across pH gradients that reflect different geochemical provinces. Acidic or circumneutral/alkaline springs harbor MAGs that branched later and are enriched in sulfur- and arsenic-based O2-dependent metabolic pathways that are inconsistent with early Earth conditions. In contrast, moderately acidic springs sourced by volcanic gas harbor earlier-branching MAGs that are enriched in anaerobic, gas-dependent metabolisms (e.g. H2, CO2, CH4 metabolism) that have been hypothesized to support early microbial life. Our results provide insight into the influence of redox state in the eco-evolutionary feedbacks between thermophiles and their habitats and suggest moderately acidic springs as early Earth analogs.}, }
@article {pmid39215001, year = {2024}, author = {Becsei, &#xc1; and Fuschi, A and Otani, S and Kant, R and Weinstein, I and Alba, P and Stéger, J and Visontai, D and Brinch, C and de Graaf, M and Schapendonk, CME and Battisti, A and De Cesare, A and Oliveri, C and Troja, F and Sironen, T and Vapalahti, O and Pasquali, F and Bányai, K and Makó, M and Pollner, P and Merlotti, A and Koopmans, M and Csabai, I and Remondini, D and Aarestrup, FM and Munk, P}, title = {Time-series sewage metagenomics distinguishes seasonal, human-derived and environmental microbial communities potentially allowing source-attributed surveillance.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7551}, pmid = {39215001}, issn = {2041-1723}, support = {NNF16OC0021856//Novo Nordisk Fonden (Novo Nordisk Foundation)/ ; NNF16OC0021856//Novo Nordisk Fonden (Novo Nordisk Foundation)/ ; 874735//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; 874735//EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)/ ; }, mesh = {*Sewage/microbiology ; *Metagenomics/methods ; *Seasons ; Humans ; *Microbiota/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; *Metagenome/genetics ; Europe ; }, abstract = {Sewage metagenomics has risen to prominence in urban population surveillance of pathogens and antimicrobial resistance (AMR). Unknown species with similarity to known genomes cause database bias in reference-based metagenomics. To improve surveillance, we seek to recover sewage genomes and develop a quantification and correlation workflow for these genomes and AMR over time. We use longitudinal sewage sampling in seven treatment plants from five major European cities to explore the utility of catch-all sequencing of these population-level samples. Using metagenomic assembly methods, we recover 2332 metagenome-assembled genomes (MAGs) from prokaryotic species, 1334 of which were previously undescribed. These genomes account for ~69% of sequenced DNA and provide insight into sewage microbial dynamics. Rotterdam (Netherlands) and Copenhagen (Denmark) show strong seasonal microbial community shifts, while Bologna, Rome, (Italy) and Budapest (Hungary) have occasional blooms of Pseudomonas-dominated communities, accounting for up to ~95% of sample DNA. Seasonal shifts and blooms present challenges for effective sewage surveillance. We find that bacteria of known shared origin, like human gut microbiota, form communities, suggesting the potential for source-attributing novel species and their ARGs through network community analysis. This could significantly improve AMR tracking in urban environments.}, }
@article {pmid39214983, year = {2024}, author = {Duan, Y and Santos-Júnior, CD and Schmidt, TS and Fullam, A and de Almeida, BLS and Zhu, C and Kuhn, M and Zhao, XM and Bork, P and Coelho, LP}, title = {A catalog of small proteins from the global microbiome.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7563}, pmid = {39214983}, issn = {2041-1723}, support = {61932008//National Natural Science Foundation of China (National Science Foundation of China)/ ; }, mesh = {*Microbiota/genetics ; *Open Reading Frames/genetics ; *Bacteria/genetics/classification/metabolism ; *Metagenome/genetics ; *Archaea/genetics/metabolism/classification ; Molecular Sequence Annotation ; Bacterial Proteins/genetics/metabolism ; }, abstract = {Small open reading frames (smORFs) shorter than 100 codons are widespread and perform essential roles in microorganisms, where they encode proteins active in several cell functions, including signal pathways, stress response, and antibacterial activities. However, the ecology, distribution and role of small proteins in the global microbiome remain unknown. Here, we construct a global microbial smORFs catalog (GMSC) derived from 63,410 publicly available metagenomes across 75 distinct habitats and 87,920 high-quality isolate genomes. GMSC contains 965 million non-redundant smORFs with comprehensive annotations. We find that archaea harbor more smORFs proportionally than bacteria. We moreover provide a tool called GMSC-mapper to identify and annotate small proteins from microbial (meta)genomes. Overall, this publicly-available resource demonstrates the immense and underexplored diversity of small proteins.}, }
@article {pmid39214976, year = {2024}, author = {Yi, X and Liang, JL and Wen, P and Jia, P and Feng, SW and Liu, SY and Zhuang, YY and Guo, YQ and Lu, JL and Zhong, SJ and Liao, B and Wang, Z and Shu, WS and Li, JT}, title = {Giant viruses as reservoirs of antibiotic resistance genes.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7536}, pmid = {39214976}, issn = {2041-1723}, mesh = {*Phylogeny ; *Giant Viruses/genetics ; *Genome, Viral/genetics ; Drug Resistance, Microbial/genetics ; Bacteriophages/genetics/isolation &amp; purification ; Anti-Bacterial Agents/pharmacology ; Metagenome/genetics ; Gene Transfer, Horizontal ; Trimethoprim/pharmacology ; Drug Resistance, Bacterial/genetics ; }, abstract = {Nucleocytoplasmic large DNA viruses (NCLDVs; also called giant viruses), constituting the phylum Nucleocytoviricota, can infect a wide range of eukaryotes and exchange genetic material with not only their hosts but also prokaryotes and phages. A few NCLDVs were reported to encode genes conferring resistance to beta‑lactam, trimethoprim, or pyrimethamine, suggesting that they are potential vehicles for the transmission of antibiotic resistance genes (ARGs) in the biome. However, the incidence of ARGs across the phylum Nucleocytoviricota, their evolutionary characteristics, their dissemination potential, and their association with virulence factors remain unexplored. Here, we systematically investigated ARGs of 1416 NCLDV genomes including those of almost all currently available cultured isolates and high-quality metagenome-assembled genomes from diverse habitats across the globe. We reveal that 39.5% of them carry ARGs, which is approximately 37 times higher than that for phage genomes. A total of 12 ARG types are encoded by NCLDVs. Phylogenies of the three most abundant NCLDV-encoded ARGs hint that NCLDVs acquire ARGs from not only eukaryotes but also prokaryotes and phages. Two NCLDV-encoded trimethoprim resistance genes are demonstrated to confer trimethoprim resistance in Escherichia coli. The presence of ARGs in NCLDV genomes is significantly correlated with mobile genetic elements and virulence factors.}, }
@article {pmid39214237, year = {2025}, author = {Macowan, M and Pattaroni, C and Bonner, K and Chatzis, R and Daunt, C and Gore, M and Custovic, A and Shields, MD and Power, UF and Grigg, J and Roberts, G and Ghazal, P and Schwarze, J and Turner, S and Bush, A and Saglani, S and Lloyd, CM and Marsland, BJ}, title = {Deep multiomic profiling reveals molecular signatures that underpin preschool wheeze and asthma.}, journal = {The Journal of allergy and clinical immunology}, volume = {155}, number = {1}, pages = {94-106}, doi = {10.1016/j.jaci.2024.08.017}, pmid = {39214237}, issn = {1097-6825}, mesh = {Humans ; *Respiratory Sounds/genetics/immunology ; *Asthma/genetics/immunology ; Child, Preschool ; Child ; Female ; Male ; Adolescent ; Infant ; Microbiota ; Gene Expression Profiling ; Transcriptome ; }, abstract = {BACKGROUND: Wheezing in childhood is prevalent, with over one-half of all children experiencing at least 1 episode by age 6. The pathophysiology of wheeze, especially why some children develop asthma while others do not, remains unclear.<br><br>OBJECTIVES: This study addresses the knowledge gap by investigating the transition from preschool wheeze to asthma using multiomic profiling.<br><br>METHODS: Unsupervised, group-agnostic integrative multiomic factor analysis was performed using host/bacterial (meta)transcriptomic and bacterial shotgun metagenomic datasets from bronchial brush samples paired with metabolomic/lipidomic data from bronchoalveolar lavage samples acquired from children 1-17 years old.<br><br>RESULTS: Two multiomic factors were identified: one characterizing preschool-aged recurrent wheeze and another capturing an inferred trajectory from health to wheeze and school-aged asthma. Recurrent wheeze was driven by type 1-immune signatures, coupled with upregulation of immune-related and neutrophil-associated lipids and metabolites. Comparatively, progression toward asthma from ages 1 to 18 was dominated by changes related to airway epithelial cell gene expression, type 2-immune responses, and constituents of the airway microbiome, such as increased Haemophilus influenzae.<br><br>CONCLUSIONS: These factors highlighted distinctions between an inflammation-related phenotype in preschool wheeze, and the predominance of airway epithelial-related changes linked with the inferred trajectory toward asthma. These findings provide insights into the differential mechanisms driving the progression from wheeze to asthma and may inform targeted therapeutic strategies.}, }
@article {pmid39214080, year = {2024}, author = {Carlino, N and Blanco-Míguez, A and Punčochář, M and Mengoni, C and Pinto, F and Tatti, A and Manghi, P and Armanini, F and Avagliano, M and Barcenilla, C and Breselge, S and Cabrera-Rubio, R and Calvete-Torre, I and Coakley, M and Cobo-Díaz, JF and De Filippis, F and Dey, H and Leech, J and Klaassens, ES and Knobloch, S and O'Neil, D and Quijada, NM and Sabater, C and Skírnisdóttir, S and Valentino, V and Walsh, L and ,  and Alvarez-Ordóñez, A and Asnicar, F and Fackelmann, G and Heidrich, V and Margolles, A and Marteinsson, VT and Rota Stabelli, O and Wagner, M and Ercolini, D and Cotter, PD and Segata, N and Pasolli, E}, title = {Unexplored microbial diversity from 2,500 food metagenomes and links with the human microbiome.}, journal = {Cell}, volume = {187}, number = {20}, pages = {5775-5795.e15}, doi = {10.1016/j.cell.2024.07.039}, pmid = {39214080}, issn = {1097-4172}, mesh = {Humans ; *Metagenome/genetics ; *Gastrointestinal Microbiome/genetics ; Microbiota/genetics ; Food Microbiology ; Metagenomics/methods ; Bacteria/genetics/classification ; }, abstract = {Complex microbiomes are part of the food we eat and influence our own microbiome, but their diversity remains largely unexplored. Here, we generated the open access curatedFoodMetagenomicData (cFMD) resource by integrating 1,950 newly sequenced and 583 public food metagenomes. We produced 10,899 metagenome-assembled genomes spanning 1,036 prokaryotic and 108 eukaryotic species-level genome bins (SGBs), including 320 previously undescribed taxa. Food SGBs displayed significant microbial diversity within and between food categories. Extension to >20,000 human metagenomes revealed that food SGBs accounted on average for 3% of the adult gut microbiome. Strain-level analysis highlighted potential instances of food-to-gut transmission and intestinal colonization (e.g., Lacticaseibacillus paracasei) as well as SGBs with divergent genomic structures in food and humans (e.g., Streptococcus gallolyticus and Limosilactobabillus mucosae). The cFMD expands our knowledge on food microbiomes, their role in shaping the human microbiome, and supports future uses of metagenomics for food quality, safety, and authentication.}, }
@article {pmid39210613, year = {2024}, author = {Xu, Y and Wu, X and Li, Y and Liu, X and Fang, L and Jiang, Z}, title = {Probiotics and the Role of Dietary Substrates in Maintaining the Gut Health: Use of Live Microbes and Their Products for Anticancer Effects against Colorectal Cancer.}, journal = {Journal of microbiology and biotechnology}, volume = {34}, number = {10}, pages = {1933-1946}, pmid = {39210613}, issn = {1738-8872}, mesh = {*Probiotics/therapeutic use ; *Colorectal Neoplasms/microbiology ; Humans ; *Gastrointestinal Microbiome ; Fecal Microbiota Transplantation ; Animals ; Diet ; Bacteria/classification/genetics/metabolism ; Gastrointestinal Tract/microbiology ; Bifidobacterium ; Antineoplastic Agents ; }, abstract = {The gut microbiome is an important and the largest endocrine organ linked to the microbes of the GI tract. The bacterial, viral and fungal communities are key regulators of the health and disease status in a host at hormonal, neurological, immunological, and metabolic levels. The useful microbes can compete with microbes exhibiting pathogenic behavior by maintaining resistance against their colonization, thereby maintaining eubiosis. As diagnostic tools, metagenomic, proteomic and genomic approaches can determine various microbial markers in clinic for early diagnosis of colorectal cancer (CRC). Probiotics are live non-pathogenic microorganisms such as lactic acid bacteria, Bifidobacteria, Firmicutes and Saccharomyces that can help maintain eubiosis when administered in appropriate amounts. In addition, the type of dietary intake contributes substantially to the composition of gut microbiome. The use of probiotics has been found to exert antitumor effects at preclinical levels and promote the antitumor effects of immunotherapeutic drugs at clinical levels. Also, modifying the composition of gut microbiota by Fecal Microbiota Transplantation (FMT), and using live lactic acid producing bacteria such as Lactobacillus, Bifidobacteria and their metabolites (termed postbiotics) can contribute to immunomodulation of the tumor microenvironment. This can lead to tumor-preventive effects at early stages and antitumor effects after diagnosis of CRC. To conclude, probiotics are presumably found to be safe to use in humans and are to be studied further to promote their appliance at clinical levels for management of CRC.}, }
@article {pmid39209855, year = {2024}, author = {Whittle, MJ and Castillo-Fernandez, J and Amos, GCA and Watson, P}, title = {Metagenomic characterisation of canine skin reveals a core healthy skin microbiome.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {20104}, pmid = {39209855}, issn = {2045-2322}, mesh = {Dogs ; Animals ; *Skin/microbiology ; *Microbiota ; *Metagenomics/methods ; Metagenome ; RNA, Ribosomal, 16S/genetics ; Bacteria/classification/genetics/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; }, abstract = {Furthering our knowledge of the skin microbiome is essential to understand health and disease in canines. To date, studies into the canine skin microbiome have focused on 16S rRNA high throughput sequencing however, these lack the granularity of species and strain level taxonomic characterisation and their associated functions. The aim of this study was to provide a comprehensive assessment of the skin microbiome by analysing the skin microbiome of 72 healthy adult colony dogs, across four distinct skin sites and four breeds, using metagenomic sequencing. Our analysis revealed that breed and skin site are drivers of variation, and a core group of taxa and genes are present within the skin microbiome of healthy dogs, comprising 230 taxa and 1219 gene families. We identified 15 species within the core microbiome that are represented by more than one strain. The biosynthesis of secondary metabolites pathway was enriched in the core microbiome suggesting the skin microbiome may play a role in colonisation resistance and protection from invading pathogens. Additionally, we uncovered the novelty of the canine skin microbiome and show that further investigation is required to increase the suitability of current databases for metagenomic sequencing of canine skin samples.}, }
@article {pmid39207726, year = {2024}, author = {Lu, C and Wang, X and Ye, P and Lu, Z and Ma, J and Luo, W and Wang, S and Chen, X}, title = {Antimicrobial Peptides From the Gut Microbiome of the Centenarians: Diversification of Biosynthesis and Youthful Development of Resistance Genes.}, journal = {The journals of gerontology. Series A, Biological sciences and medical sciences}, volume = {79}, number = {11}, pages = {}, doi = {10.1093/gerona/glae218}, pmid = {39207726}, issn = {1758-535X}, mesh = {Humans ; *Gastrointestinal Microbiome/genetics/physiology ; Aged, 80 and over ; *Antimicrobial Peptides/genetics ; Male ; Female ; Aged ; Adult ; Drug Resistance, Bacterial/genetics ; Middle Aged ; Probiotics ; }, abstract = {Antimicrobial peptides (AMPs) offer a potential solution to the antibiotic crisis owing to their antimicrobial properties, and the human gut biome may be a source of these peptides. However, the potential AMPs and AMP resistance genes (AMPRGs) of gut microbes in different age groups have not been thoroughly assessed. Here, we investigated the potential development of AMPs and the distribution pattern of AMPRGs in the gut microbiome at different ages by analyzing the intestinal metagenomic data of healthy individuals at different life stages (CG: centenarians group n = 20; OAG: older adults group: n = 15; YG: young group: n = 15). Age-related increases were observed in the potential AMPs within the gut microbiome, with centenarians showing a greater diversity of these peptides. However, the gut microbiome of the CG group had a lower level of AMPRGs compared to that of the OAG group, and it was similar to the level found in the YG group. Additionally, conventional probiotic strains showed a significant positive correlation with certain potential AMPs and were associated with a lower detection of resistance genes. Furthermore, comparing potential AMPs with existing libraries revealed limited similarity, indicating that current machine learning models can identify novel peptides in the gut microbiota. These results indicate that longevity may benefit from the diversity of AMPs and lower resistance genes. Our findings help explain the age advantage of the centenarians and identify the potential for antimicrobial peptide biosynthesis in the human gut microbiome, offering insights into the development of antimicrobial peptide resistance and the screening of probiotic strains.}, }
@article {pmid39207108, year = {2024}, author = {Crouch, AL and Monsey, L and Rambeau, M and Ramos, C and Yracheta, JM and Anderson, MZ}, title = {Metagenomic discovery of microbial eukaryotes in stool microbiomes.}, journal = {mBio}, volume = {15}, number = {10}, pages = {e0206324}, pmid = {39207108}, issn = {2150-7511}, support = {//Ohio State University (OSU)/ ; 2046863//National Science Foundation (NSF)/ ; //Chan Zuckerberg Initiative (CZI)/ ; }, mesh = {Humans ; *Metagenomics/methods ; *Feces/microbiology ; *Eukaryota/genetics/classification/isolation &amp; purification ; Gastrointestinal Microbiome/genetics ; Metagenome ; Fungi/genetics/classification/isolation &amp; purification ; Sequence Analysis, DNA/methods ; Microbiota/genetics ; }, abstract = {Host-associated microbiota form complex microbial communities that are increasingly associated with host behavior and disease. While these microbes include bacterial, archaeal, viral, and eukaryotic constituents, most studies have focused on bacteria due to their dominance in the human host and available tools for investigation. Accumulating evidence suggests microbial eukaryotes in the microbiome play pivotal roles in host health, but our understandings of these interactions are limited to a few readily identifiable taxa because of technical limitations in unbiased eukaryote exploration. Here, we combined cell sorting, optimized eukaryotic cell lysis, and shotgun sequencing to accelerate metagenomic discovery and analysis of host-associated microbial eukaryotes. Using synthetic communities with a 1% microbial eukaryote representation, the eukaryote-optimized cell lysis and DNA recovery method alone yielded a 38-fold increase in eukaryotic DNA. Automated sorting of eukaryotic cells from stool samples of healthy adults increased the number of microbial eukaryote reads in metagenomic pools by up to 28-fold compared to commercial kits. Read frequencies for identified fungi increased by 10,000× on average compared to the Human Microbiome Project and allowed for the identification of novel taxa, de novo assembly of contigs from previously unknown microbial eukaryotes, and gene prediction from recovered genomic segments. These advances pave the way for the unbiased inclusion of microbial eukaryotes in deciphering determinants of health and disease in the host-associated microbiome.IMPORTANCEMicrobial eukaryotes are common constituents of the human gut where they can contribute to local ecology and host health, but they are often overlooked in microbiome studies. The lack of attention is due to current technical limitations that are heavily biased or poorly recovered DNA from microbial eukaryotes. We developed a method to increase the representation of these eukaryotes in metagenomic sequencing of microbiome samples that allows to improve their detection compared to prior methods and allows for the identification of new species. Application of the technique to gut microbiome samples improved detection of fungi, protists, and helminths. New eukaryotic taxa and their encoded genes could be identified by sequencing a small number of samples. This approach can improve the inclusion of eukaryotes into microbiome research.}, }
@article {pmid39206042, year = {2024}, author = {Zhen, J and Zhang, Y and Li, Y and Zhou, Y and Cai, Y and Huang, G and Xu, A}, title = {The gut microbiota intervenes in glucose tolerance and inflammation by regulating the biosynthesis of taurodeoxycholic acid and carnosine.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1423662}, pmid = {39206042}, issn = {2235-2988}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Dysbiosis/microbiology ; *Carnosine/metabolism ; Male ; *Feces/microbiology ; Glucose Intolerance/metabolism ; Inflammation/metabolism ; Hep G2 Cells ; Metagenomics ; Female ; Middle Aged ; Taurochenodeoxycholic Acid/metabolism/pharmacology ; Hyperglycemia/metabolism ; Neutrophils/metabolism ; RNA, Ribosomal, 16S/genetics ; Bacteria/classification/metabolism/genetics ; }, abstract = {OBJECTIVE: This study aims to investigate the pathogenesis of hyperglycemia and its associated vasculopathy using multiomics analyses in diabetes and impaired glucose tolerance, and validate the mechanism using the cell experiments.<br><br>METHODS: In this study, we conducted a comprehensive analysis of the metagenomic sequencing data of diabetes to explore the key genera related to its occurrence. Subsequently, participants diagnosed with impaired glucose tolerance (IGT), and healthy subjects, were recruited for fecal and blood sample collection. The dysbiosis of the gut microbiota (GM) and its associated metabolites were analyzed using 16S rDNA sequencing and liquid chromatograph mass spectrometry, respectively. The regulation of gene and protein expression was evaluated through mRNA sequencing and data-independent acquisition technology, respectively. The specific mechanism by which GM dysbiosis affects hyperglycemia and its related vasculopathy was investigated using real-time qPCR, Western blotting, and enzyme-linked immunosorbent assay techniques in HepG2 cells and neutrophils.<br><br>RESULTS: Based on the published data, the key alterable genera in the GM associated with diabetes were identified as Blautia, Lactobacillus, Bacteroides, Prevotella, Faecalibacterium, Bifidobacterium, Ruminococcus, Clostridium, and Lachnoclostridium. The related metabolic pathways were identified as cholate degradation and L-histidine biosynthesis. Noteworthy, Blautia and Faecalibacterium displayed similar alterations in patients with IGT compared to those observed in patients with diabetes, and the GM metabolites, tauroursodeoxycholic acid (TUDCA) and carnosine (CARN, a downstream metabolite of histidine and alanine) were both found to be decreased, which in turn regulated the expression of proteins in plasma and mRNAs in neutrophils. Subsequent experiments focused on insulin-like growth factor-binding protein 3 and interleukin-6 due to their impact on blood glucose regulation and associated vascular inflammation. Both proteins were found to be suppressed by TUDCA and CARN in HepG2 cells and neutrophils.<br><br>CONCLUSION: Dysbiosis of the GM occurred throughout the entire progression from IGT to diabetes, characterized by an increase in Blautia and a decrease in Faecalibacterium, leading to reduced levels of TUDCA and CARN, which alleviated their inhibition on the expression of insulin-like growth factor-binding protein 3 and interleukin-6, contributing to the development of hyperglycemia and associated vasculopathy.}, }
@article {pmid39205200, year = {2024}, author = {Santos, JPN and Rodrigues, GVP and Ferreira, LYM and Monteiro, GP and Fonseca, PLC and Lopes, &#xcd;S and Florêncio, BS and da Silva Junior, AB and Ambrósio, PE and Pirovani, CP and Aguiar, ERGR}, title = {The Virome of Cocoa Fermentation-Associated Microorganisms.}, journal = {Viruses}, volume = {16}, number = {8}, pages = {}, pmid = {39205200}, issn = {1999-4915}, support = {Financial code 001//Coordena&#xe7;&#xe3;o de Aperfei&#xe7;oamento de Pessoal de N&#xed;vel Superior-Brazil (CAPES)/ ; Researcher fellowship//Conselho Nacional de Desenvolvimento Cient&#xed;fico e Tecnol&#xf3;gico (CNPq)/ ; }, mesh = {*Cacao/virology/microbiology ; *Fermentation ; *Virome ; Viruses/genetics/classification/isolation &amp; purification ; Fungi/virology/genetics/classification ; Phylogeny ; Bacteriophages/genetics/classification/isolation &amp; purification ; Costa Rica ; Bacteria/genetics/classification/virology ; Metagenomics ; Genome, Viral ; }, abstract = {Theobroma cacao plantations are of significant economic importance worldwide, primarily for chocolate production. During the harvest and processing of cocoa beans, they are subjected to fermentation either by microorganisms present in the environment (spontaneous fermentation) or the addition of starter cultures, with different strains directly contributing distinct flavor and color characteristics to the beans. In addition to fungi and bacteria, viruses are ubiquitous and can affect the quality of the fermentation process by infecting fermenting organisms, destabilizing microbial diversity, and consequently affecting fermentation quality. Therefore, in this study, we explored publicly available metatranscriptomic libraries of cocoa bean fermentation in Limon Province, Costa Rica, looking for viruses associated with fermenting microorganisms. Libraries were derived from the same sample at different time points: 7, 20, and 68 h of fermentation, corresponding to yeast- and lactic acid bacteria-driven phases. Using a comprehensive pipeline, we identified 68 viral sequences that could be assigned to 62 new viral species and 6 known viruses distributed among at least nine families, with particular abundance of elements from the Lenarviricota phylum. Interestingly, 44 of these sequences were specifically associated with ssRNA phages (Fiersviridae) and mostly fungi-infecting viral families (Botourmiaviridae, Narnaviridae, and Mitoviridae). Of note, viruses from those families show a complex evolutionary relationship, transitioning from infecting bacteria to infecting fungi. We also identified 10 and 3 viruses classified within the Totiviridae and Nodaviridae families, respectively. The quantification of the virus-derived RNAs shows a general pattern of decline, similar to the dynamic profile of some microorganism genera during the fermentation process. Unexpectedly, we identified narnavirus-related elements that showed similarity to segmented viral species. By exploring the molecular characteristics of these viral sequences and applying Hidden Markov Models, we were capable of associating these additional segments with a specific taxon. In summary, our study elucidates the complex virome associated with the microbial consortia engaged in cocoa bean fermentation that could contribute to organism/strain selection, altering metabolite production and, consequently, affecting the sensory characteristics of cocoa beans.}, }
@article {pmid39204265, year = {2024}, author = {Ariyadasa, S and van Hamelsveld, S and Taylor, W and Lin, S and Sitthirit, P and Pang, L and Billington, C and Weaver, L}, title = {Diversity of Free-Living Amoebae in New Zealand Groundwater and Their Ability to Feed on Legionella pneumophila.}, journal = {Pathogens (Basel, Switzerland)}, volume = {13}, number = {8}, pages = {}, pmid = {39204265}, issn = {2076-0817}, support = {ESR2023SA1//Ministry of Business, Innovation, and Employment New Zealand/ ; }, mesh = {New Zealand ; *Legionella pneumophila/isolation &amp; purification/genetics ; *Groundwater/microbiology/parasitology ; *Amoeba/microbiology ; Humans ; Biodiversity ; Water Microbiology ; Acanthamoeba/microbiology/isolation &amp; purification/genetics ; Ecosystem ; }, abstract = {Free-living amoebae (FLA) are common in both natural and engineered freshwater ecosystems. They play important roles in biofilm control and contaminant removal through the predation of bacteria and other taxa. Bacterial predation by FLA is also thought to contribute to pathogen dispersal and infectious disease transmission in freshwater environments via the egestion of viable bacteria. Despite their importance in shaping freshwater microbial communities, the diversity and function of FLA in many freshwater ecosystems are poorly understood. In this study, we isolated and characterized FLA from two groundwater sites in Canterbury, New Zealand using microbiological, microscopic, and molecular techniques. Different methods for groundwater FLA isolation and enrichment were trialed and optimized. The ability of these isolated FLA to predate on human pathogen Legionella pneumophila was assessed. FLA were identified by 18S metagenomic amplicon sequencing. Our study showed that Acanthamoeba spp. (including A. polyphaga) and Vermamoeba veriformis were the main FLA species present in both groundwater sites examined. While most of the isolated FLA co-existed with L. pneumophila, the FLA populations in the L. pneumophila co-culture experiments predominantly consisted of A. polyphaga, Acanthamoeba spp., Naegleria spp., V. vermiformis, Paravahlkampfia spp., and Echinamoeba spp. These observations suggest that FLA may have the potential to act as reservoirs for L. pneumophila in Canterbury, New Zealand groundwater systems and could be introduced into the local drinking water infrastructure, where they may promote the survival, multiplication, and dissemination of Legionella. This research addresses an important gap in our understanding of FLA-mediated pathogen dispersal in freshwater ecosystems.}, }
@article {pmid39202331, year = {2024}, author = {Zheng, X and Xu, L and Tang, Q and Shi, K and Wang, Z and Shi, L and Ding, Y and Yin, Z and Zhang, X}, title = {Integrated Metagenomic and Metabolomics Profiling Reveals Key Gut Microbiota and Metabolites Associated with Weaning Stress in Piglets.}, journal = {Genes}, volume = {15}, number = {8}, pages = {}, pmid = {39202331}, issn = {2073-4425}, support = {202103a06020013//Major special science and technology project of Anhui Province/ ; GXXT-2023-059//the Cooperative Innovation Project of Anhui Provincial Universities/ ; 340000211260001000431//the Joint Research Project on Local Pig Breeding in Anhui Province/ ; 2021YFD1301200//National Key research and development Program of China/ ; }, mesh = {Animals ; *Weaning ; *Gastrointestinal Microbiome ; Swine ; *Metabolomics/methods ; *Metagenomics/methods ; Stress, Physiological ; Metabolome ; Animals, Newborn ; Cecum/microbiology/metabolism ; }, abstract = {(1) Background: Weaning is a challenging and stressful event in the pig's life, which disrupts physiological balance and induces oxidative stress. Microbiota play a significant role during the weaning process in piglets. Therefore, this study aimed to investigate key gut microbiota and metabolites associated with weaning stress in piglets. (2) Methods: A total of ten newborn piglet littermates were randomly assigned to two groups: S (suckling normally) and W (weaned at 21 d; all euthanized at 23 d). Specimens of the cecum were dehydrated with ethanol, cleared with xylene, embedded in paraffin, and cut into 4 mm thick serial sections. After deparaffinization, the sections were stained with hematoxylin and eosin (H&amp;E) for morphometric analysis. Cecal metagenomic and liver LC-MS-based metabolomics were employed in this study. Statistical comparisons were performed by a two-tailed Student's t-test, and p < 0.05 indicated statistical significance. (3) Results: The results showed that weaning led to intestinal morphological damage in piglets. The intestinal villi of suckling piglets were intact, closely arranged in an orderly manner, and finger-shaped, with clear contours of columnar epithelial cells. In contrast, the intestines of weaned piglets showed villous atrophy and shedding, as well as mucosal bleeding. Metagenomics and metabolomics analyses showed significant differences in composition and function between suckling and weaned piglets. The W piglets showed a decrease and increase in the relative abundance of Bacteroidetes and Proteobacteria (p < 0.05), respectively. The core cecal flora in W piglets were Campylobacter and Clostridium, while those in S piglets were Prevotella and Lactobacillus. At the phylum level, the relative abundance of Bacteroidetes significantly decreased (p < 0.05) in weaned piglets, while Proteobacteria significantly increased (p < 0.05). Significant inter-group differences were observed in pathways and glycoside hydrolases in databases, such as the KEGG and CAZymes, including fructose and mannose metabolism, salmonella infection, antifolate resistance, GH135, GH16, GH32, and GH84. We identified 757 differential metabolites between the groups through metabolomic analyses-350 upregulated and 407 downregulated (screened in positive ion mode). In negative ion mode, 541 differential metabolites were identified, with 270 upregulated and 271 downregulated. Major differential metabolites included glycerophospholipids, histidine, nitrogen metabolism, glycine, serine, threonine, β-alanine, and primary bile acid biosynthesis. The significant differences in glycine, serine, and threonine metabolites may be potentially related to dysbiosis caused by weaning stress. Taken together, the identification of microbiome and metabolome signatures of suckling and weaned piglets has paved the way for developing health-promoting nutritional strategies, focusing on enhancing bacterial metabolite production in early life stages.}, }
@article {pmid39201270, year = {2024}, author = {Su, H and Yang, S and Chen, S and Chen, X and Guo, M and Zhu, L and Xu, W and Liu, H}, title = {What Happens in the Gut during the Formation of Neonatal Jaundice-Underhand Manipulation of Gut Microbiota?.}, journal = {International journal of molecular sciences}, volume = {25}, number = {16}, pages = {}, pmid = {39201270}, issn = {1422-0067}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Jaundice, Neonatal/therapy/microbiology/etiology ; Infant, Newborn ; *Probiotics ; *Bilirubin/metabolism/blood ; Breast Feeding ; Milk, Human/microbiology/metabolism ; }, abstract = {Jaundice is a symptom of high blood bilirubin levels affecting about 80% of neonates. In neonates fed with breast milk, jaundice is particularly prevalent and severe, which is likely multifactorial. With the development of genomics and metagenomics, a deeper understanding of the neonatal gut microbiota has been achieved. We find there are accumulating evidence to indicate the importance of the gut microbiota in the mechanism of jaundice. In this paper, we present new comprehensive insight into the relationship between the microbiota and jaundice. In the new perspective, the gut is a crucial crossroad of bilirubin excretion, and bacteria colonizing the gut could play different roles in the excretion of bilirubin, including Escherichia coli as the main traffic jam causers, some Clostridium and Bacteroides strains as the traffic police, and most probiotic Bifidobacterium and Lactobacillus strains as bystanders with no effect or only a secondary indirect effect on the metabolism of bilirubin. This insight could explain why breast milk jaundice causes a longer duration of blood bilirubin and why most probiotics have limited effects on neonatal jaundice. With the encouragement of breastmilk feeding, our perspective could guide the development of new therapy methods to prevent this side effect of breastfeeding.}, }
@article {pmid39201260, year = {2024}, author = {Ryu, HM and Islam, SMS and Riaz, B and Sayeed, HM and Choi, B and Sohn, S}, title = {Immunomodulatory Effects of a Probiotic Mixture: Alleviating Colitis in a Mouse Model through Modulation of Cell Activation Markers and the Gut Microbiota.}, journal = {International journal of molecular sciences}, volume = {25}, number = {16}, pages = {}, pmid = {39201260}, issn = {1422-0067}, mesh = {Animals ; *Probiotics/pharmacology ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Disease Models, Animal ; *Colitis/microbiology/therapy/diet therapy/chemically induced ; *Dextran Sulfate/toxicity ; RNA, Ribosomal, 16S/genetics ; Colitis, Ulcerative/microbiology/therapy/immunology/diet therapy ; Biomarkers ; Mice, Inbred C57BL ; Colon/microbiology/pathology/metabolism ; }, abstract = {Ulcerative colitis (UC) is a persistent inflammatory intestinal disease that consistently affects the colon and rectum. Its exact cause remains unknown. UC causes a considerable challenge in healthcare, prompting research for novel therapeutic strategies. Although probiotics have gained popularity as possible candidates for managing UC, studies are still ongoing to identify the best probiotics or probiotic mixtures for clinical applications. This study aimed to determine the efficacy of a multi-strain probiotic mixture in mitigating intestinal inflammation in a colitis mouse model induced by dextran sulfate sodium. Specifically, a multi-strain probiotic mixture consisting of Tetragenococcus halophilus and Eubacterium rectale was used to study its impact on colitis symptoms. Anti-inflammatory effects were evaluated using ELISA and flow cytometry. The configuration of gut microbial communities was determined using 16S rRNA metagenomic analysis. According to this study, colitis mice treated with the probiotic mixture experienced reduced weight loss and significantly less colonic shortening compared to untreated mice. Additionally, the treated mice exhibited increased levels of forkhead box P3 (Foxp3) and interleukin 10, along with decreased expression of dendritic cell activation markers, such as CD40+, CD80+, and CD83+, in peripheral blood leukocytes and intraepithelial lymphocytes. Furthermore, there was a significant decrease in the frequencies of CD8+N.K1.1+ cells and CD11b+Ly6G+ cells. In terms of the gut microbiota, probiotic-mixture treatment of colitis mice significantly increased the abundance of the phyla Actinobacteria and Verrucomicrobia (p < 0.05). These results provide valuable insights into the therapeutic promise of multi-strain probiotics, shedding light on their potential to alleviate colitis symptoms. This research contributes to the ongoing exploration of effective probiotic interventions for managing inflammatory bowel disease.}, }
@article {pmid39201258, year = {2024}, author = {Al-Sarraj, F and Albiheyri, R and Qari, M and Alotaibi, M and Al-Zahrani, M and Anwar, Y and Alghamdi, MA and Nass, NM and Bouback, T and Alotibi, I and Radhwi, O and Sajer, BH and Redhwan, A and Al-Matary, MA and Almanzalawi, EA and Elshafie, HS}, title = {Genetic Patterns of Oral Cavity Microbiome in Patients with Sickle Cell Disease.}, journal = {International journal of molecular sciences}, volume = {25}, number = {16}, pages = {}, pmid = {39201258}, issn = {1422-0067}, support = {grant no. J: 007-130-1443.//Deanship of Scientific Research (DSR) at King Abdulaziz University (KAU), Jeddah/ ; }, mesh = {Humans ; *Anemia, Sickle Cell/microbiology/genetics ; *Mouth/microbiology ; *Microbiota/genetics ; *RNA, Ribosomal, 16S/genetics ; Female ; Male ; Adult ; *Saliva/microbiology ; Bacteria/genetics/classification/isolation &amp; purification ; Young Adult ; Case-Control Studies ; Adolescent ; High-Throughput Nucleotide Sequencing ; Middle Aged ; }, abstract = {The Middle Eastern prevalence of sickle cell anemia, a genetic disorder that affects red blood cells, necessitates additional research. On a molecular level, we sought to identify and sort the oral microbiota of healthy individuals and those with sickle cell anemia. Furthermore, it is crucial to comprehend how changes in the genetic makeup of the oral microbiota impact the state of sickle cell anemia. Using next-generation sequencing, the 16S rRNA amplicon was examined using saliva samples from 36 individuals with sickle cell anemia and healthy individuals. These samples were obtained from sickle cell anemia patients (18 samples) and healthy control participants (controls, 18 samples). Various analyses are conducted using bioinformatic techniques to identify distinct species and their relative abundance. Streptococcus, followed by Fusobacterium nucleatum, Prevotella, and Veillonella were the most prevalent genera of bacteria in the saliva of the SCA and non-SCA individuals according to our findings. Rothia mucilaginosa, Prevotella scoposa, and Veillonella dispar species were the dominant species in both sickle cell anemia and non-sickle cell anemia subjects. Streptococcus salivarius, Actinomyces graevenitzii, Actinomyces odontolyticus, and Actinomyces georgiae spp. were the most prevalent bacterial spp. in the studied SCA cases. The sequencing of the 16S rRNA gene yielded relative abundance values that were visualized through a heatmap analysis. Alterations in the oral microflora's constitution can significantly affect the susceptibility of sickle cell anemia patients to develop more severe health complications. Salivary diagnosis is a potential tool for predicting and preventing oral microbiome-related diseases in the future.}, }
@article {pmid39198832, year = {2024}, author = {Su, W and Gong, C and Zhong, H and Yang, H and Chen, Y and Wu, X and Jin, J and Xi, H and Zhao, J}, title = {Vaginal and endometrial microbiome dysbiosis associated with adverse embryo transfer outcomes.}, journal = {Reproductive biology and endocrinology : RB&amp;E}, volume = {22}, number = {1}, pages = {111}, pmid = {39198832}, issn = {1477-7827}, support = {437606312//Wenzhou Medical University advantageous and distinctive Discipline Construction Project/ ; }, mesh = {Humans ; Female ; *Embryo Transfer/methods ; *Dysbiosis/microbiology ; Adult ; *Vagina/microbiology ; *Microbiota/genetics/physiology ; *Endometrium/microbiology/metabolism ; *Embryo Implantation/physiology ; Pregnancy ; *Infertility, Female/microbiology/therapy ; Fertilization in Vitro/methods ; RNA, Ribosomal, 16S/genetics ; }, abstract = {BACKGROUND: Assisted reproductive technology (ART) is the most effective method to treat infertility and the pathogenesis of implantation failure after in vitro fertilization-embryo transfer (IVF-ET) is a challenging filed in infertility. Microbes in the female reproductive tract are considered to be associated with gynecological and obstetric diseases. However, its effects on embryo implantation failure are unsured.<br><br>PURPOSE: This study aimed to investigate reproductive tract dysbiosis, identify different bacteria in reproductive tract as potential biomarkers of embryo implantation failure and demonstrate the pathogenesis through metabolites analysis.<br><br>METHODS: We compared the data from 16S rRNA gene and metagenome in reproductive tracts through QIIME2 and HUMAnN2 by the times of embryo implantation failure on 239 infertile patients and 17 healthy women.<br><br>RESULTS: Our study revealed a strong positive correlation between Lactobacillus abundance and embryo implantation success (IS) after IVF-ET. The microbial community composition and structure in reproductive tract showed substantially difference between the embryo implantation failure (IF) and healthy control. Moreover, we established a diagnostic model through receiver operating characteristic (ROC) with 0.913 area under curve (AUC) in IS and multiple implantation failures (MIF), verified its effectiveness with an AUC&#x2009;=&#x2009;0.784 demonstrating microbial community alterations could efficiently discriminate MIF patients. Metagenome functional analyses of vaginal samples from another independent infertile patients after IVF-ET revealed the L-lysine synthesis pathway enriched in IF patients, along with ascended vaginal pH and decreased Lactobacillus abundance.<br><br>CONCLUSIONS: This study clarifies several independent relationships of bacteria in vagina and endometrial fluid on embryo implantation failure and undoubtedly broadens the understanding about female reproductive health.}, }
@article {pmid39198826, year = {2024}, author = {Su, Q and Zhuang, DH and Li, YC and Chen, Y and Wang, XY and Ge, MX and Xue, TY and Zhang, QY and Liu, XY and Yin, FQ and Han, YM and Gao, ZL and Zhao, L and Li, YX and Lv, MJ and Yang, LQ and Xia, TR and Luo, YJ and Zhang, Z and Kong, QP}, title = {Gut microbiota contributes to high-altitude hypoxia acclimatization of human populations.}, journal = {Genome biology}, volume = {25}, number = {1}, pages = {232}, pmid = {39198826}, issn = {1474-760X}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Acclimatization ; *Altitude ; Animals ; Adult ; Male ; *Hypoxia/genetics ; Mice ; Female ; Longitudinal Studies ; Altitude Sickness/microbiology/genetics ; Middle Aged ; }, abstract = {BACKGROUND: The relationship between human gut microbiota and high-altitude hypoxia acclimatization remains highly controversial. This stems primarily from uncertainties regarding both the potential temporal changes in the microbiota under such conditions and the existence of any dominant or core bacteria that may assist in host acclimatization.<br><br>RESULTS: To address these issues, and to control for variables commonly present in previous studies which significantly impact the results obtained, namely genetic background, ethnicity, lifestyle, and diet, we conducted a 108-day longitudinal study on the same cohort comprising 45 healthy Han adults who traveled from lowland Chongqing, 243 masl, to high-altitude plateau Lhasa, Xizang, 3658 masl, and back. Using shotgun metagenomic profiling, we study temporal changes in gut microbiota composition at different timepoints. The results show a significant reduction in the species and functional diversity of the gut microbiota, along with a marked increase in functional redundancy. These changes are primarily driven by the overgrowth of Blautia A, a genus that is also abundant in six independent Han cohorts with long-term duration in lower hypoxia environment in Shigatse, Xizang, at 4700 masl. Further animal experiments indicate that Blautia A-fed mice exhibit enhanced intestinal health and a better acclimatization phenotype to sustained hypoxic stress.<br><br>CONCLUSIONS: Our study underscores the importance of Blautia A species in the gut microbiota's rapid response to high-altitude hypoxia and its potential role in maintaining intestinal health and aiding host adaptation to extreme environments, likely via anti-inflammation and intestinal barrier protection.}, }
@article {pmid39198450, year = {2024}, author = {Licht, P and Dominelli, N and Kleemann, J and Pastore, S and Müller, ES and Haist, M and Hartmann, KS and Stege, H and Bros, M and Meissner, M and Grabbe, S and Heermann, R and Mailänder, V}, title = {The skin microbiome stratifies patients with cutaneous T cell lymphoma and determines event-free survival.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {74}, pmid = {39198450}, issn = {2055-5008}, mesh = {Humans ; *Microbiota ; *Skin/microbiology ; Female ; Middle Aged ; Male ; *Staphylococcus aureus/genetics/pathogenicity/isolation &amp; purification ; *Lymphoma, T-Cell, Cutaneous/microbiology ; Aged ; *Mycosis Fungoides/microbiology ; Dysbiosis/microbiology ; Skin Neoplasms/microbiology/pathology ; Adult ; Aged, 80 and over ; Metagenomics/methods ; Virulence Factors/genetics ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Mycosis fungoides (MF) is the most common entity of Cutaneous T cell lymphomas (CTCL) and is characterized by the presence of clonal malignant T cells in the skin. The role of the skin microbiome for MF development and progression are currently poorly understood. Using shotgun metagenomic profiling, real-time qPCR, and T cell receptor sequencing, we compared lesional and nonlesional skin of 20 MF patients with early and advanced MF. Additionally, we isolated Staphylococcus aureus and other bacteria from MF skin for functional profiling and to study the S. aureus virulence factor spa. We identified a subgroup of MF patients with substantial dysbiosis on MF lesions and concomitant outgrowth of S. aureus on plaque-staged lesions, while the other MF patients had a balanced microbiome on lesional skin. Dysbiosis and S. aureus outgrowth were accompanied by ectopic levels of cutaneous antimicrobial peptides (AMPs), including adaptation of the plaque-derived S. aureus strain. Furthermore, the plaque-derived S. aureus strain showed a reduced susceptibility towards antibiotics and an upregulation of the virulence factor spa, which may activate the NF-κB pathway. Remarkably, patients with dysbiosis on MF lesions had a restricted T cell receptor repertoire and significantly lower event-free survival. Our study highlights the potential for microbiome-modulating treatments targeting S. aureus to prevent MF progression.}, }
@article {pmid39198444, year = {2024}, author = {Chang, D and Gupta, VK and Hur, B and Cobo-López, S and Cunningham, KY and Han, NS and Lee, I and Kronzer, VL and Teigen, LM and Karnatovskaia, LV and Longbrake, EE and Davis, JM and Nelson, H and Sung, J}, title = {Gut Microbiome Wellness Index 2 enhances health status prediction from gut microbiome taxonomic profiles.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7447}, pmid = {39198444}, issn = {2041-1723}, support = {TL1 TR002493/TR/NCATS NIH HHS/United States ; UL1TR002377//U.S. Department of Health &amp; Human Services | National Institutes of Health (NIH)/ ; UL1 TR002377/TR/NCATS NIH HHS/United States ; UL1 TR001863/TR/NCATS NIH HHS/United States ; UL1 TR002494/TR/NCATS NIH HHS/United States ; }, mesh = {*Gastrointestinal Microbiome/genetics ; Humans ; *Feces/microbiology ; *Health Status ; Metagenome ; Bacteria/classification/genetics/isolation &amp; purification ; Female ; }, abstract = {Recent advancements in translational gut microbiome research have revealed its crucial role in shaping predictive healthcare applications. Herein, we introduce the Gut Microbiome Wellness Index 2 (GMWI2), an enhanced version of our original GMWI prototype, designed as a standardized disease-agnostic health status indicator based on gut microbiome taxonomic profiles. Our analysis involves pooling existing 8069 stool shotgun metagenomes from 54 published studies across a global demographic landscape (spanning 26 countries and six continents) to identify gut taxonomic signals linked to disease presence or absence. GMWI2 achieves a cross-validation balanced accuracy of 80% in distinguishing healthy (no disease) from non-healthy (diseased) individuals and surpasses 90% accuracy for samples with higher confidence (i.e., outside the "reject option"). This performance exceeds that of the original GMWI model and traditional species-level α-diversity indices, indicating a more robust gut microbiome signature for differentiating between healthy and non-healthy phenotypes across multiple diseases. When assessed through inter-study validation and external validation cohorts, GMWI2 maintains an average accuracy of nearly 75%. Furthermore, by reevaluating previously published datasets, GMWI2 offers new insights into the effects of diet, antibiotic exposure, and fecal microbiota transplantation on gut health. Available as an open-source command-line tool, GMWI2 represents a timely, pivotal resource for evaluating health using an individual's unique gut microbial composition.}, }
@article {pmid39198442, year = {2024}, author = {Campos-Madueno, EI and Aldeia, C and Endimiani, A}, title = {Nanopore R10.4 metagenomic detection of blaCTX-M/blaDHA antimicrobial resistance genes and their genetic environments in stool.}, journal = {Nature communications}, volume = {15}, number = {1}, pages = {7450}, pmid = {39198442}, issn = {2041-1723}, support = {192514//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung (Swiss National Science Foundation)/ ; }, mesh = {*Feces/microbiology ; *Escherichia coli/genetics/isolation &amp; purification ; Humans ; *beta-Lactamases/genetics/metabolism ; *Metagenomics/methods ; *Nanopores ; Escherichia coli Proteins/genetics ; Plasmids/genetics ; Nanopore Sequencing/methods ; Drug Resistance, Bacterial/genetics ; Anti-Bacterial Agents/pharmacology ; Gastrointestinal Microbiome/genetics ; }, abstract = {The increasing prevalence of gut colonization with CTX-M extended-spectrum β-lactamase- and/or DHA plasmid-mediated AmpC-producing Escherichia coli is a concern. Here, we evaluate Nanopore-shotgun metagenomic sequencing (Nanopore-SMS) latest V14 chemistry to detect blaCTX-M and blaDHA genes from healthy stools. We test 25 paired samples characterized with culture-based methods (native and pre-enriched). Antimicrobial resistant genes (ARGs) are detected from reads and meta-assembled genomes (MAGs) to determine their associated genetic environments (AGEs). Sensitivity and specificity of native Nanopore-SMS are 61.1% and 100%, compared to 81.5% and 75% for pre-enriched Nanopore-SMS, respectively. Native Nanopore-SMS identifies only one sample with an AGE, whereas pre-enriched Nanopore-SMS recognizes 9/18 plasmids and 5/9 E. coli chromosomes. Pre-enriched Nanopore-SMS identifies more ARGs than native Nanopore-SMS (p < 0.001). Notably, blaCTX-Ms and blaDHAs AGEs (plasmid and chromosomes) are identified within 1 hour of sequencing. Furthermore, microbiota analyses show that pre-enriched Nanopore-SMS results in more E. coli classified reads (47% vs. 3.1%), higher differential abundance (5.69 log2 fold) and lower Shannon diversity index (p < 0.0001). Nanopore-SMS has the potential to be used for intestinal colonization screening. However, sample pre-enrichment is necessary to increase sensitivity. Further computational improvements are needed to reduce the turnaround time for clinical applications.}, }
@article {pmid39198293, year = {2024}, author = {Joseph, B and Babu, S}, title = {Effect of Organic and Chemical Fertilizer on the Diversity of Rhizosphere and Leaf Microbial Composition in Sunflower Plant.}, journal = {Current microbiology}, volume = {81}, number = {10}, pages = {331}, pmid = {39198293}, issn = {1432-0991}, mesh = {*Fertilizers/analysis ; *Rhizosphere ; *Helianthus/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/drug effects ; *Plant Leaves/microbiology ; *Soil Microbiology ; *Fungi/classification/genetics/isolation &amp; purification ; *Manure/microbiology ; Microbiota ; Biodiversity ; Metagenomics ; }, abstract = {Applying organic manure to crops positively impacts the soil microbial community which is negatively impacted when chemical fertilizers are used. Organic manures also add new microbes to the soil in addition to influencing the growth of native ones. Metagenomic analysis of different organic manures, soil, and pot culture experiments conducted under various fertilizer conditions constitute the primary methodologies employed in this study. We compared the effect of two organic manure combinations and an inorganic fertilizer combination on microbial community of rhizosphere soil and leaves of sunflower plants. Metagenomic sequencing data analysis revealed that the diversity of bacteria and fungi is higher in organic manure than in chemical fertilizers. Each organic manure combination selectively increased population of some specific microbes and supported new microbes. Application of chemical fertilizer hurts many plant beneficial fungi and bacteria. In summary, our study points out the superiority of organic manure combinations in enhancing microbial diversity and supporting beneficial microbes. These findings enhance the profound influence of fertilizer types on sunflower microbial communities, shedding light on the intricate dynamics within the rhizosphere and leaf microbiome. Bacterial genera such as Bacillus, Serratia, Sphingomonas, Pseudomonas, Methylobacterium, Acinetobacter, Stenotrophomonas, and fungal genera such as Wallemia, Aspergillus, Cladosporium, and Penicillium constitute the key microbes of sunflower plants.}, }
@article {pmid39197546, year = {2024}, author = {Kim, H and Lee, E and Park, M and Min, K and Diep, YN and Kim, J and Ahn, H and Lee, E and Kim, S and Kim, Y and Kang, YJ and Jung, JH and Byun, MS and Joo, Y and Jeong, C and Lee, DY and Cho, H and Park, H and Kim, T}, title = {Microbiome-derived indole-3-lactic acid reduces amyloidopathy through aryl-hydrocarbon receptor activation.}, journal = {Brain, behavior, and immunity}, volume = {122}, number = {}, pages = {568-582}, doi = {10.1016/j.bbi.2024.08.051}, pmid = {39197546}, issn = {1090-2139}, mesh = {Animals ; Female ; Humans ; Male ; Mice ; *Alzheimer Disease/metabolism ; *Amyloid beta-Peptides/metabolism ; Amyloidosis/metabolism ; Astrocytes/metabolism ; Brain/metabolism ; Cognitive Dysfunction/metabolism ; *Disease Models, Animal ; *Gastrointestinal Microbiome/drug effects ; *Indoles/pharmacology ; Mice, Transgenic ; Microbiota/drug effects ; Microglia/metabolism ; *Receptors, Aryl Hydrocarbon/metabolism ; Signal Transduction/drug effects ; Tryptophan/metabolism/pharmacology ; }, abstract = {Alzheimer's disease (AD) pathogenesis has been associated with the gut microbiome and its metabolites, though the specific mechanisms have remained unclear. In our study, we used a multi-omics approach to identify specific microbial strains and metabolites that could potentially mitigate amyloidopathy in 5xFAD mice, a widely used model for AD research. Among the microbial strains tested, three showed promising results in reducing soluble amyloid-beta (Aβ) levels. Plasma metabolomics analysis revealed an enrichment of tryptophan (Trp) and indole-3-lactic acid (ILA) in mice with reduced soluble Aβ levels, suggesting a potential preventative role. The administration of a combined treatment of Trp and ILA prevented both Aβ accumulation and cognitive impairment in the 5xFAD mice. Our investigation into the mechanism revealed that ILA's effect on reducing Aβ levels was mediated through the activation of microglia and astrocytes, facilitated by the aryl hydrocarbon receptor (AhR) signaling pathway. These mechanisms were verified through experiments in 5xFAD mice that included an additional group with the administration of ILA alone, as well as in vitro experiments using an AhR inhibitor. Clinical data analysis revealed a greater abundance of Lactobacillus reuteri in the gut of healthy individuals compared to those at early stages of Aβ accumulation or with mild cognitive impairment. Additionally, human post-mortem brain analyses showed an increased expression of genes associated with the AhR signaling pathway in individuals without AD, suggesting a protective effect against AD progression. Our results indicate that ILA from gut microbes could inhibit the progression of amyloidopathy in 5xFAD mice through activation of AhR signaling in the brain.}, }
@article {pmid39197484, year = {2024}, author = {Lu, W and Zheng, Y and Wang, Y and Song, J and Weng, Y and Ma, W and Arslan, M and Gamal El-Din, M and Wang, D and Wang, Q and Chen, C}, title = {Survival strategies and assembly mechanisms of microbial communities in petroleum-contaminated soils.}, journal = {Environmental research}, volume = {262}, number = {Pt 1}, pages = {119857}, doi = {10.1016/j.envres.2024.119857}, pmid = {39197484}, issn = {1096-0953}, mesh = {*Soil Microbiology ; *Soil Pollutants/analysis ; *Petroleum ; China ; Bacteria/genetics/classification/metabolism ; Archaea/genetics ; Microbiota ; Fungi/genetics/metabolism ; Soil/chemistry ; }, abstract = {This study analyzed petroleum-contaminated soils from south and north locations in China to explore the structure, diversity, functional genes and assembly processes of microbial communities' . Compared with soils from south locations, soils from northern regions exhibited elevated pH, total nitrogen (TN), and total petroleum hydrocarbon (TPH) levels. Among these, TN and TPH were the most influential on the microbial community. The dominant phyla for bacteria, archaea, and fungi were Proteobacteria, Thaumarchaeota, and Ascomycota, respectively. Among them, Proteobacteria was strongly correlated with various functional genes including alkB and many aromatics degradation and denitrification genes (r > 0.9, p < 0.01), suggesting that Proteobacteria play an important role in petroleum-contaminated soils. Metabolism in northern regions was more active than that in southern regions. The northern regions showed a pronounced tendency for denitrification, while the southern regions were characterized by acetoclastic methanogenesis. The assembly of microbial communities exhibited regional patterns, the deterministic assembly was more prominent in the northern soils, while the stochastic assembly was evident in the southern soils. Overall, these findings provide a new conceptual framework to understand the biosphere in petroleum-contaminated soil, potentially guiding improved management practices in the environmental remediation.}, }
@article {pmid39197454, year = {2024}, author = {Thänert, R and Schwartz, DJ and Keen, EC and Hall-Moore, C and Wang, B and Shaikh, N and Ning, J and Rouggly-Nickless, LC and Thänert, A and Ferreiro, A and Fishbein, SRS and Sullivan, JE and Radmacher, P and Escobedo, M and Warner, BB and Tarr, PI and Dantas, G}, title = {Clinical sequelae of gut microbiome development and disruption in hospitalized preterm infants.}, journal = {Cell host &amp; microbe}, volume = {32}, number = {10}, pages = {1822-1837.e5}, pmid = {39197454}, issn = {1934-6069}, support = {K99 AI175674/AI/NIAID NIH HHS/United States ; P30 ES030283/ES/NIEHS NIH HHS/United States ; R01 AI184858/AI/NIAID NIH HHS/United States ; T32 DK077653/DK/NIDDK NIH HHS/United States ; 2021081/DDCF/Doris Duke Charitable Foundation/United States ; R01 AI155893/AI/NIAID NIH HHS/United States ; UH3 AI083265/AI/NIAID NIH HHS/United States ; R01 HD092414/HD/NICHD NIH HHS/United States ; P30 DK052574/DK/NIDDK NIH HHS/United States ; K08 AI159384/AI/NIAID NIH HHS/United States ; T32 HD007409/HD/NICHD NIH HHS/United States ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; *Infant, Premature ; Infant, Newborn ; *Feces/microbiology ; *Enterocolitis, Necrotizing/microbiology ; Female ; *Metagenomics ; *Anti-Bacterial Agents/pharmacology ; Male ; Clostridioides difficile/genetics ; Intensive Care Units, Neonatal ; Infant ; Hospitalization ; Enterobacteriaceae/genetics ; Enterococcus/genetics ; Staphylococcus epidermidis ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Aberrant preterm infant gut microbiota assembly predisposes to early-life disorders and persistent health problems. Here, we characterize gut microbiome dynamics over the first 3 months of life in 236 preterm infants hospitalized in three neonatal intensive care units using shotgun metagenomics of 2,512 stools and metatranscriptomics of 1,381 stools. Strain tracking, taxonomic and functional profiling, and comprehensive clinical metadata identify Enterobacteriaceae, enterococci, and staphylococci as primarily exploiting available niches to populate the gut microbiome. Clostridioides difficile lineages persist between individuals in single centers, and Staphylococcus epidermidis lineages persist within and, unexpectedly, between centers. Collectively, antibiotic and non-antibiotic medications influence gut microbiome composition to greater extents than maternal or baseline variables. Finally, we identify a persistent low-diversity gut microbiome in neonates who develop necrotizing enterocolitis after day of life 40. Overall, we comprehensively describe gut microbiome dynamics in response to medical interventions in preterm, hospitalized neonates.}, }
@article {pmid39197279, year = {2024}, author = {Guo, Y and Cheng, S and Fang, H and Geng, J and Li, Y and Shi, F and Wang, H and Chen, L and Zhou, Y}, title = {Copper and cadmium co-contamination increases the risk of nitrogen loss in red paddy soils.}, journal = {Journal of hazardous materials}, volume = {479}, number = {}, pages = {135626}, doi = {10.1016/j.jhazmat.2024.135626}, pmid = {39197279}, issn = {1873-3336}, mesh = {*Cadmium/toxicity/metabolism ; *Soil Pollutants/metabolism ; *Copper/toxicity ; *Soil Microbiology ; *Nitrogen/metabolism ; China ; Bacteria/metabolism/genetics/classification ; Soil/chemistry ; Oryza/metabolism/growth &amp; development ; Nitrogen Cycle ; Denitrification ; Microbiota/drug effects ; }, abstract = {The microbiome plays a crucial role in soil nitrogen (N) cycling and in regulating its bioavailability. However, the functional and genomic information of microorganisms encoding N cycling in response to copper (Cu) and cadmium (Cd) contamination is largely unknown. Here, metagenomics and genome binning were used to examine microbial N cycling in Cu and Cd co-contaminated red paddy soils collected from a polluted watershed in southern China. The results showed that soil Cu and Cd concentrations induced more drastic changes in microbial N functional and taxonomic traits than soil general properties. Soil Cu and Cd co-contamination stimulated microbial nitrification, denitrification, and dissimilatory nitrate reduction processes mainly by increasing the abundance of Nitrospira (phylum Nitrospirota), while inhibiting N fixation by decreasing the abundance of Desulfobacca. These contrasting changes in microbial N cycling processes suggested a potential risk of N loss in paddy soils. A high-quality genome was identified as belonging to Nitrospirota with the highest abundance in heavily contaminated soils. This novel Nitrospirota strain possessed metabolic capacities for N transformation and metal resistance. These findings elucidate the genetic mechanisms underlying soil N bioavailability under long-term Cu and Cd contamination, which is essential for maintaining agricultural productivity and controlling heavy metal pollution.}, }
@article {pmid39197244, year = {2025}, author = {Zhang, C and Gu, C and Wang, M and Chen, J and Chang, H and Chang, Z and Zhou, J and Yue, M and Zhang, W and Zhang, Q and Feng, Z}, title = {Effect of temperature regulation on microbial community, volatile flavours, amino acid profiles, and iridoid glycosides during noni (Morinda citrifolia L.) fruit fermentation.}, journal = {Food chemistry}, volume = {462}, number = {}, pages = {140966}, doi = {10.1016/j.foodchem.2024.140966}, pmid = {39197244}, issn = {1873-7072}, mesh = {*Fermentation ; *Fruit/chemistry/metabolism/microbiology ; *Amino Acids/metabolism/analysis ; *Bacteria/metabolism/classification/genetics/isolation &amp; purification ; *Microbiota ; *Morinda/chemistry/metabolism ; *Iridoid Glycosides/metabolism/analysis/chemistry ; *Temperature ; Volatile Organic Compounds/metabolism/chemistry ; Flavoring Agents/metabolism/chemistry ; }, abstract = {Noni fruit has an unpleasant flavour but is highly bioactive. Therefore, it is necessary to clarify the effect of temperature regulation on quality of fermented noni fruit. In the present study, the formation of flavours, amino acid profiles, and iridoid glycosides during noni fruit fermentation at different temperatures were investigated. We initially found that different temperatures affected core microbial communities. The general evolutionary trends of Acetobacter and Gluconobacter were influenced by different temperatures. Furthermore, high temperature helped maintain low octanoic and hexanoic acids. Subsequently, we found that high temperature improved total amino acids and iridoid glycosides. The correlation network analysis revealed that bacterial communities impacted the quality (volatile flavours, amino acid profiles, and iridoid glycosides) of fermented noni fruit. Overall, altering the temperature induced variations in microbial communities and quality during the noni fruit fermentation process. These results are instrumental in the pursuit of quality control in natural fermentation processes.}, }
@article {pmid39197040, year = {2024}, author = {Chen, S and Zhang, Z and Liu, S and Chen, T and Lu, Z and Zhao, W and Mou, X and Liu, S}, title = {Consistent signatures in the human gut microbiome of longevous populations.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2393756}, pmid = {39197040}, issn = {1949-0984}, mesh = {Humans ; *Gastrointestinal Microbiome ; *Longevity ; Aged, 80 and over ; *Feces/microbiology ; *Bacteria/classification/genetics/isolation &amp; purification/metabolism ; Female ; Adult ; Male ; Aged ; Young Adult ; Metagenomics ; Middle Aged ; Desulfovibrio/genetics/metabolism ; }, abstract = {Gut microbiota of centenarians has garnered significant attention in recent years, with most studies concentrating on the analysis of microbial composition. However, there is still limited knowledge regarding the consistent signatures of specific species and their biological functions, as well as the potential causal relationship between gut microbiota and longevity. To address this, we performed the fecal metagenomic analysis of eight longevous populations at the species and functional level, and employed the Mendelian randomization (MR) analysis to infer the causal associations between microbial taxa and longevity-related traits. We observed that several species including Eisenbergiella tayi, Methanobrevibacter smithii, Hungatella hathewayi, and Desulfovibrio fairfieldensis were consistently enriched in the gut microbiota of long-lived individuals compared to younger elderly and young adults across multiple cohorts. Analysis of microbial pathways and enzymes indicated that E. tayi plays a role in the protein N-glycosylation, while M. smithii is involved in the 3-dehydroquinate and chorismate biosynthesis. Furthermore, H. hathewayi makes a distinct contribution to the purine nucleobase degradation I pathway, potentially assisting the elderly in maintaining purine homeostasis. D. fairfieldensis contributes to the menaquinone (vitamin K2) biosynthesis, which may help prevent age-related diseases such as osteoporosis-induced fractures. According to MR results, Hungatella was significantly positively correlated with parental longevity, and Desulfovibrio also exhibited positive associations with lifespan and multiple traits related to parental longevity. Additionally, Alistipes and Akkermansia muciniphila were consistently enriched in the gut microbiota of the three largest cohorts of long-lived individuals, and MR analysis also suggests their potential causal relationships with longevity. Our findings reveal longevity-associated gut microbial signatures, which are informative for understanding the role of microbiota in regulating longevity and aging.}, }
@article {pmid39196507, year = {2024}, author = {Qian, Y and Sorgen, AA and Steffen, KJ and Heinberg, LJ and Reed, K and Carroll, IM}, title = {Intestinal Energy Harvest Mediates Gut Microbiota-Associated Weight Loss Following Bariatric Surgery.}, journal = {Obesity surgery}, volume = {34}, number = {10}, pages = {3771-3780}, pmid = {39196507}, issn = {1708-0428}, support = {1R01DK112585-01//National Institute of Health/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome/physiology ; *Weight Loss/physiology ; Female ; Male ; *Bariatric Surgery ; *Obesity, Morbid/surgery/microbiology ; Adult ; Middle Aged ; Energy Metabolism ; Feces/microbiology ; }, abstract = {PURPOSE: Metabolic and bariatric surgery (MBS) is the most effective treatment for class III obesity. The capacity to efficiently extract intestinal energy is potentially a determinant of varying weight loss outcomes post-MBS. Prior research indicated that intestinal energy harvest is correlated with post-MBS weight loss. Studies have also demonstrated that the gut microbiota is associated with weight loss post-MBS. We aim to investigate whether gut microbiota-associated weight loss is mediated by intestinal energy harvest in patients post-MBS.<br><br>MATERIALS AND METHODS: We examined the relationship between specific gut microbiota, intestinal energy harvest, diet, and weight loss using fecal metagenomic sequence data, bomb calorimetry (fecal energy content as a proxy for calorie absorption), and a validated dietary questionnaire on 67 individuals before and after MBS. Mediation analysis and a&#xa0;machine learning algorithm were conducted.<br><br>RESULTS: Intestinal energy harvest was a mediator in the relationship between the&#xa0;intestinal microbiota (Bacteroides caccae) and weight loss outcomes in patients post-MBS at 18&#xa0;months (M). The association between the abundance of B. caccae and post-MBS weight loss rate at 18&#xa0;M was partly mediated by 1&#xa0;M intestinal energy harvest (&#x3b2;&#x2009;=&#x2009;0.001&#x2009;&#xb1;&#x2009;0.001, P&#x2009;=&#x2009;0.020). This mediation represents 2.83% of the total effect (&#x3b2;&#x2009;=&#x2009;0.050&#x2009;&#xb1;&#x2009;0.047; P&#x2009;=&#x2009;0.028). Intestinal microbiota and energy harvest improved random forest model's accuracy in predicting weight loss results.<br><br>CONCLUSION: Energy harvest partly mediates the relationship between the intestinal microbiota and weight loss outcomes among patients post-MBS. This study elucidates a potential mechanism regarding how intestinal energy absorption facilitates the effect of intestinal microbiota on energy metabolism and weight loss outcomes.}, }
@article {pmid39195462, year = {2024}, author = {Pan, D and Xiao, P and Li, F and Liu, J and Zhang, T and Zhou, X and Zhang, Y}, title = {High Degree of Polymerization of Chitin Oligosaccharides Produced from Shrimp Shell Waste by Enrichment Microbiota Using Two-Stage Temperature-Controlled Technique of Inducing Enzyme Production and Metagenomic Analysis of Microbiota Succession.}, journal = {Marine drugs}, volume = {22}, number = {8}, pages = {}, pmid = {39195462}, issn = {1660-3397}, support = {32100065//National Natural Science Foundation of China/ ; 32300031//National Natural Science Foundation of China/ ; 2023KJ207//Shandong Province Youth Entrepreneurship Technology Support Program for Higher Education Institutions/ ; ZR2023MB095//Natural Science Foundation of Shandong Province of China/ ; }, mesh = {*Chitin/chemistry ; Animals ; *Oligosaccharides/chemistry ; *Microbiota ; *Chitinases/metabolism ; *Animal Shells/chemistry ; Metagenomics/methods ; Temperature ; Polymerization ; Bacteria ; }, abstract = {The direct enzymatic conversion of untreated waste shrimp and crab shells has been a key problem that plagues the large-scale utilization of chitin biological resources. The microorganisms in soil samples were enriched in two stages with powdered chitin (CP) and shrimp shell powder (SSP) as substrates. The enrichment microbiota XHQ10 with SSP degradation ability was obtained. The activities of chitinase and lytic polysaccharide monooxygenase of XHQ10 were 1.46 and 54.62 U/mL. Metagenomic analysis showed that Chitinolyticbacter meiyuanensis, Chitiniphilus shinanonensis, and Chitinimonas koreensis, with excellent chitin degradation performance, were highly enriched in XHQ10. Chitin oligosaccharides (CHOSs) are produced by XHQ10 through enzyme induction and two-stage temperature control technology, which contains CHOSs with a degree of polymerization (DP) more significant than ten and has excellent antioxidant activity. This work is the first study on the direct enzymatic preparation of CHOSs from SSP using enrichment microbiota, which provides a new path for the large-scale utilization of chitin bioresources.}, }
@article {pmid39192744, year = {2024}, author = {Metcalfe-Roach, A and Cirstea, MS and Yu, AC and Ramay, HR and Coker, O and Boroomand, S and Kharazyan, F and Martino, D and Sycuro, LK and Appel-Cresswell, S and Finlay, BB}, title = {Metagenomic Analysis Reveals Large-Scale Disruptions of the Gut Microbiome in Parkinson's Disease.}, journal = {Movement disorders : official journal of the Movement Disorder Society}, volume = {39}, number = {10}, pages = {1740-1751}, doi = {10.1002/mds.29959}, pmid = {39192744}, issn = {1531-8257}, support = {GR008160//Pacific Parkinson's Research Institute/ ; FDN-159935/CAPMC/CIHR/Canada ; PPG-2020-0000000052//Parkinson Canada/ ; FDN-159935/CAPMC/CIHR/Canada ; }, mesh = {Humans ; *Parkinson Disease/microbiology ; *Gastrointestinal Microbiome/genetics/physiology ; Male ; Female ; Aged ; Middle Aged ; *Metagenomics/methods ; *Feces/microbiology ; Disease Progression ; }, abstract = {BACKGROUND: Parkinson's disease (PD) has been consistently linked to alterations within the gut microbiome.<br><br>OBJECTIVE: Our goal was to identify microbial features associated with PD incidence and progression.<br><br>METHODS: Metagenomic sequencing was used to characterize taxonomic and functional changes to the PD microbiome and to explore their relation to bacterial metabolites and disease progression. Motor and non-motor symptoms were tracked using Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) and levodopa equivalent dose across &#x2264;5 yearly study visits. Stool samples were collected at baseline for metagenomic sequencing (176 PD, 100 controls).<br><br>RESULTS: PD-derived stool samples had reduced intermicrobial connectivity and seven differentially abundant species compared to controls. A suite of bacterial functions differed between PD and controls, including depletion of carbohydrate degradation pathways and enrichment of ribosomal genes. Faecalibacterium prausnitzii-specific reads contributed significantly to more than half of all differentially abundant functional terms. A subset of disease-associated functional terms correlated with faster progression of MDS-UPDRS part IV and separated those with slow and fast progression with moderate accuracy within a random forest model (area under curve&#x2009;=&#x2009;0.70). Most PD-associated microbial trends were stronger in those with symmetric motor symptoms.<br><br>CONCLUSION: We provide further evidence that the PD microbiome is characterized by reduced intermicrobial communication and a shift to proteolytic metabolism in lieu of short-chain fatty acid production, and suggest that these microbial alterations may be relevant to disease progression. We also describe how our results support the existence of gut-first versus brain-first PD subtypes. &#xa9; 2024 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.}, }
@article {pmid39192682, year = {2024}, author = {Flynn, PJ and Moreau, CS}, title = {Viral diversity and co-evolutionary dynamics across the ant phylogeny.}, journal = {Molecular ecology}, volume = {33}, number = {19}, pages = {e17519}, doi = {10.1111/mec.17519}, pmid = {39192682}, issn = {1365-294X}, support = {2210800//Division of Biological Infrastructure/ ; 1900357//Division of Environmental Biology/ ; //National Science Foundation Graduate Research Fellowship Program/ ; }, mesh = {*Ants/virology/microbiology/genetics ; Animals ; *Phylogeny ; *Biodiversity ; Genome, Viral/genetics ; Metagenome/genetics ; DNA Viruses/genetics/classification ; Bacteria/genetics/virology/classification ; RNA Viruses/genetics/classification ; Ecosystem ; Bacteriophages/genetics/classification ; Virome/genetics ; }, abstract = {Knowledge of viral biodiversity within insects, particularly within ants, is extremely limited with only a few environmental viruses from invasive ant species identified to date. This study documents and explores the viral communities in ants. We comprehensively profile the metagenomes of a phylogenetically broad group of 35 ant species with varied ecological traits and report the discovery of 3710 novel and unique ant-associated viral genomes. These previously unknown viruses discovered within this study constitute over 95% of all currently described ant viruses, significantly increasing our knowledge of the ant virosphere. The identified RNA and DNA viruses fill gaps in insect-associated viral phylogenies and uncover evolutionary histories characterized by both frequent host switching and co-divergence. Many ants also host diverse bacterial communities, and we discovered that approximately one-third of these new ant-associated viruses are bacteriophages. Two ecological categories, bacterial abundance in the host and habitat degradation are both correlated with ant viral diversity and help to structure viral communities within ants. These data demonstrate that the ant virosphere is remarkably diverse phylogenetically and genomically and provide a substantial foundation for studies in virus ecology and evolution within eukaryotes. We highlight the importance of studying insect-associated viruses in natural ecosystems in order to more thoroughly and effectively understand host-microbe evolutionary dynamics.}, }
@article {pmid39192352, year = {2024}, author = {Zeng, G and Zeng, L and Wang, Y and Cao, Z and Zeng, X and Xue, Z and Liu, S and Li, Y and He, L}, title = {Correlation between gut microbiota characteristics and non-small cell lung cancer based on macrogenomics sequencing.}, journal = {Hereditas}, volume = {161}, number = {1}, pages = {26}, pmid = {39192352}, issn = {1601-5223}, support = {No. 2023349//Chengdu Municipal Health Commission/ ; }, mesh = {*Carcinoma, Non-Small-Cell Lung/genetics ; Humans ; *Gastrointestinal Microbiome ; *Lung Neoplasms/genetics/microbiology ; Male ; Middle Aged ; Female ; Feces/microbiology ; Aged ; Metagenome ; Metagenomics/methods ; Bacteria/genetics/classification ; }, abstract = {OBJECTIVE: Non-small cell lung cancer (NSCLC) patients undergoing chemotherapy and immunotherapy experience disturbances in the gut microbiota. This study intends to find out the correlation between gut microbiota and clinical indices before and after radiotherapy for NSCLC.<br><br>METHODS: Ten patients with primary NSCLC were screened, and plasma and fecal samples were collected before and after radiotherapy, respectively. Inflammatory indices in plasma were detected. Genomic DNA was extracted from fecal specimens and sequenced on on Illumina HiSeq2000 sequencing platform. Thee sequenced data were subjected to Metagenome assembly, gene prediction, species annotation, and gene function analysis to study and analyze gut microbiota and metabolic functions. The correlation between the diversity of gut microbiota and the clinical indicators of NSCLC patients was evaluated, and the changes of gut microbiota before and after radiotherapy were observed.<br><br>RESULTS: The diversity of gut microbiota in NSCLC patients did not correlate with smoking, pathology, and inflammatory markers. The abundance of phylum (p)_Bacteroidetes increased; p_Firmicutes and p_Bacteroidetes accounted for the highest proportion in NSCLC patients, and the abundance of both was dominantly exchanged after radiotherapy. There was a decrease in genus (g)_Bifidobacterium after radiotherapy in NSCLC patients. There was no significant correlation between the diversity of gut microbiota after radiotherapy and radiotherapy sensitivity, and the structural composition and abundance of gut microbiota remained stable.<br><br>CONCLUSION: The diversity of gut microbiota is altered after radiotherapy in NSCLC patients, showing an increase in harmful bacteria and a decrease in beneficial bacteria.}, }
@article {pmid39192220, year = {2024}, author = {Samak, ME and Solyman, SM and Hanora, A and Zakeer, S}, title = {Metagenomic mining of two Egyptian Red Sea sponges associated microbial community.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {315}, pmid = {39192220}, issn = {1471-2180}, support = {59/2020//Academy of Scientific Research and Technology/ ; 6420/2009//SIDA/ ; }, mesh = {*Porifera/microbiology ; Animals ; Indian Ocean ; *Metagenomics ; *Microbiota/genetics ; Egypt ; Bacteria/genetics/classification ; Phylogeny ; Biodiversity ; Multigene Family ; Biological Products/metabolism ; Metagenome ; Proteobacteria/genetics/classification/isolation &amp; purification ; }, abstract = {The Red Sea is a promising habitat for the discovery of new bioactive marine natural products. Sponges associated microorganisms represent a wealthy source of compounds with unique chemical structures and diverse biological activities. Metagenomics is an important omics-based culture-independent technique that is used as an effective tool to get genomic and functional information on sponge symbionts. In this study, we used metagenomic analysis of two Egyptian Red Sea sponges Hyrtios erectus and Phorbas topsenti microbiomes to study the biodiversity and the biosynthetic potential of the Red Sea sponges to produce bioactive compounds. Our data revealed high biodiversity of the two sponges' microbiota with phylum Proteobacteria as the most dominant phylum in the associated microbial community with an average of 31% and 70% respectively. The analysis also revealed high biosynthetic potential of sponge Hyrtios erectus microbiome through detecting diverse types of biosynthetic gene clusters (BGCs) with predicted cytotoxic, antibacterial and inhibitory action. Most of these BGCs were predicted to be novel as they did not show any similarity with any MIBiG database known cluster. This study highlights the importance of the microbiome of the collected Red Sea sponge Hyrtios erectus as a valuable source of new bioactive natural products.}, }
@article {pmid39191812, year = {2024}, author = {Feng, Y and Wei, R and Chen, Q and Shang, T and Zhou, N and Wang, Z and Chen, Y and Chen, G and Zhang, G and Dong, K and Zhong, Y and Zhao, H and Hu, F and Zheng, H}, title = {Host specificity and cophylogeny in the "animal-gut bacteria-phage" tripartite system.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {72}, pmid = {39191812}, issn = {2055-5008}, mesh = {Animals ; *Host Specificity ; *Bacteriophages/genetics/physiology ; *Gastrointestinal Microbiome ; Bees/virology/microbiology ; *Bacteria/virology/genetics/classification ; *Phylogeny ; Metagenomics/methods ; Metagenome ; }, abstract = {Cophylogeny has been identified between gut bacteria and their animal host and is highly relevant to host health, but little research has extended to gut bacteriophages. Here we use bee model to investigate host specificity and cophylogeny in the "animal-gut bacteria-phage" tripartite system. Through metagenomic sequencing upon different bee species, the gut phageome revealed a more variable composition than the gut bacteriome. Nevertheless, the bacteriome and the phageome showed a significant association of their dissimilarity matrices, indicating a reciprocal interaction between the two kinds of communities. Most of the gut phages were host generalist at the viral cluster level but host specialist at the viral OTU level. While the dominant gut bacteria Gilliamella and Snodgrassella exhibited matched phylogeny with bee hosts, most of their phages showed a diminished level of cophylogeny. The evolutionary rates of the bee, the gut bacteria and the gut phages showed a remarkably increasing trend, including synonymous and non-synonymous substitution and gene content variation. For all of the three codiversified tripartite members, however, their genes under positive selection and genes involving gain/loss during evolution simultaneously enriched the functions into metabolism of nutrients, therefore highlighting the tripartite coevolution that results in an enhanced ecological fitness for the whole holobiont.}, }
@article {pmid39191760, year = {2024}, author = {Hartikainen, AK and Jalanka, J and Lahtinen, P and Ponsero, AJ and Mertsalmi, T and Finnegan, L and Crispie, F and Cotter, PD and Arkkila, P and Satokari, R}, title = {Fecal microbiota transplantation influences microbiota without connection to symptom relief in irritable bowel syndrome patients.}, journal = {NPJ biofilms and microbiomes}, volume = {10}, number = {1}, pages = {73}, pmid = {39191760}, issn = {2055-5008}, support = {316338//Academy of Finland (Suomen Akatemia)/ ; 323156//Academy of Finland (Suomen Akatemia)/ ; }, mesh = {*Irritable Bowel Syndrome/therapy/microbiology ; Humans ; *Fecal Microbiota Transplantation/methods ; *RNA, Ribosomal, 16S/genetics ; Female ; Male ; Adult ; Treatment Outcome ; *Gastrointestinal Microbiome ; Middle Aged ; Feces/microbiology ; Metagenomics/methods ; Bacteria/classification/genetics/isolation &amp; purification ; }, abstract = {Imbalanced microbiota may contribute to the pathophysiology of irritable bowel syndrome (IBS), thus fecal microbiota transplantation (FMT) has been suggested as a potential treatment. Previous studies on the relationship between clinical improvement and microbiota after FMT have been inconclusive. In this study, we used 16S rRNA gene amplicon and shotgun metagenomics data from a randomized, placebo controlled FMT trial on 49 IBS patients to analyze changes after FMT in microbiota composition and its functional potential, and to identify connections between microbiota and patients' clinical outcome. As a result, we found that the successful modulation of microbiota composition and functional profiles by FMT from a healthy donor was not associated with the resolution of symptoms in IBS patients. Notably, a donor derived strain of Prevotella copri dominated the microbiota in those patients in the FMT group who had a low relative abundance of P. copri pre-FMT. The results highlight the multifactorial nature of IBS and the role of recipient's microbiota in the colonization of donor's strains.}, }
@article {pmid39191378, year = {2024}, author = {da Silva, VG and Smith, NW and Mullaney, JA and Wall, C and Roy, NC and McNabb, WC}, title = {Food-breastmilk combinations alter the colonic microbiome of weaning infants: an in silico study.}, journal = {mSystems}, volume = {9}, number = {9}, pages = {e0057724}, pmid = {39191378}, issn = {2379-5077}, support = {//High-Value Nutrition National Science Challenge/ ; }, mesh = {Humans ; *Milk, Human/chemistry/microbiology/metabolism ; *Gastrointestinal Microbiome/physiology ; Infant ; *Weaning ; *Colon/microbiology/metabolism ; *Computer Simulation ; Fatty Acids, Volatile/metabolism/analysis ; }, abstract = {The introduction of solid foods to infants, also known as weaning, is a critical point for the development of the complex microbial community inhabiting the human colon, impacting host physiology in infancy and later in life. This research investigated in silico the impact of food-breastmilk combinations on growth and metabolite production by colonic microbes of New Zealand weaning infants using the metagenome-scale metabolic model named Microbial Community. Eighty-nine foods were individually combined with breastmilk, and the 12 combinations with the strongest influence on the microbial production of short-chain fatty acids (SCFAs) and branched-chain fatty acids (BCFAs) were identified. Fiber-rich and polyphenol-rich foods, like pumpkin and blackcurrant, resulted in the greatest increase in predicted fluxes of total SCFAs and individual fluxes of propionate and acetate when combined, respectively, with breastmilk. Identified foods were further combined with other foods and breastmilk, resulting in 66 multiple food-breastmilk combinations. These combinations altered in silico the impact of individual foods on the microbial production of SCFAs and BCFAs, suggesting that the interaction between the dietary compounds composing a meal is the key factor influencing colonic microbes. Blackcurrant combined with other foods and breastmilk promoted the greatest increase in the production of acetate and total SCFAs, while pork combined with other foods and breastmilk decreased the production of total BCFAs.IMPORTANCELittle is known about the influence of complementary foods on the colonic microbiome of weaning infants. Traditional in vitro and in vivo microbiome methods are limited by their resource-consuming concerns. Modeling approaches represent a promising complementary tool to provide insights into the behavior of microbial communities. This study evaluated how foods combined with other foods and human milk affect the production of short-chain fatty acids and branched-chain fatty acids by colonic microbes of weaning infants using a rapid and inexpensive in silico approach. Foods and food combinations identified here are candidates for future experimental investigations, helping to fill a crucial knowledge gap in infant nutrition.}, }
@article {pmid39189780, year = {2024}, author = {Liu, L and He, X and Wang, J and Li, M and Wei, X and Yang, J and Cheng, G and Du, W and Liu, Z and Xiao, X}, title = {Exploring the associations between gut microbiota composition and SARS-CoV-2 inactivated vaccine response in mice with type 2 diabetes mellitus.}, journal = {mSphere}, volume = {9}, number = {9}, pages = {e0038024}, pmid = {39189780}, issn = {2379-5042}, support = {82002149//MOST | National Natural Science Foundation of China (NSFC)/ ; 2022CFB451//| Natural Science Foundation of Hubei Province ()/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome ; Mice ; *Diabetes Mellitus, Type 2/immunology ; *Mice, Inbred C57BL ; *Vaccines, Inactivated/immunology ; *COVID-19/prevention &amp; control/immunology ; *SARS-CoV-2/immunology ; *Feces/microbiology ; *COVID-19 Vaccines/immunology ; Immunoglobulin G/blood ; RNA, Ribosomal, 16S/genetics ; Lung/microbiology/immunology ; Female ; Male ; Probiotics/administration &amp; dosage ; Antibodies, Viral/blood ; Vaccine Efficacy ; }, abstract = {UNLABELLED: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination is crucial for protecting vulnerable individuals, yet individuals with type 2 diabetes mellitus (T2DM) often exhibit impaired vaccine responses. Emerging evidence suggests that the composition of the host microbiota, crucial in immune regulation and development, influences vaccine efficacy. This study aimed to characterize the relationships between the SARS-CoV-2 inactivated vaccine and the host microbiota (specifically, gut and lung microbiota) of C57BL/6 mice with T2DM. Employing 16S rRNA metagenomic sequencing and ultra-high-performance liquid chromatography-mass spectrometry, we observed lower alpha diversity and distinct beta diversity in fecal microbiota before vaccination and in gut microbiota 28 days post-vaccination between T2DM mice and healthy mice. Compared with healthy mice, T2DM mice showed a higher Firmicutes/Bacteroidetes ratio 28 days post-vaccination. Significant alterations in gut microbiota composition were detected following vaccination, while lung microbiota remained unchanged. T2DM was associated with a diminished initial IgG antibody response against the spike protein, which subsequently normalized after 28 days. Notably, the initial IgG response positively correlated with fecal microbiota alpha diversity pre-vaccination. Furthermore, after 28 days, increased relative abundance of gut probiotics (Bifidobacterium and Lactobacillus) and higher levels of the gut bacterial tryptophan metabolite, indole acrylic acid, were positively associated with IgG levels. These findings suggest a potential link between vaccine efficacy and gut microbiota composition. Nonetheless, further research is warranted to elucidate the precise mechanisms underlying the impact of the gut microbiome on vaccine response. Overall, this study enhances our understanding of the intricate relationships among host microbiota, SARS-CoV-2 vaccination, and T2DM, with potential implications for improving vaccine efficacy.<br><br>IMPORTANCE: Over 7 million deaths attributed to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by 6 May 2024 underscore the urgent need for effective vaccination strategies. However, individuals with type 2 diabetes mellitus (T2DM) have been identified as particularly vulnerable and display compromised immune responses to vaccines. Concurrently, increasing evidence suggests that the composition and diversity of gut microbiota, crucial regulators of immune function, may influence the efficacy of vaccines. Against this backdrop, our study explores the complex interplay among SARS-CoV-2 inactivated vaccination, T2DM, and host microbiota. We discover that T2DM compromises the initial immune response to the SARS-CoV-2 inactivated vaccine, and this response is positively correlated with specific features of the gut microbiota, such as alpha diversity. We also demonstrate that the vaccination itself induces alterations in the composition and structure of the gut microbiota. These findings illuminate potential links between the gut microbiota and vaccine efficacy in individuals with T2DM, offering valuable insights that could enhance vaccine responses in this high-risk population.}, }
@article {pmid39189742, year = {2024}, author = {Wurzbacher, CE and Hammer, J and Haufschild, T and Wiegand, S and Kallscheuer, N and Jogler, C}, title = {"Candidatus Uabimicrobium helgolandensis"-a planctomycetal bacterium with phagocytosis-like prey cell engulfment, surface-dependent motility, and cell division.}, journal = {mBio}, volume = {15}, number = {10}, pages = {e0204424}, pmid = {39189742}, issn = {2150-7511}, support = {AWI_BAH_o4//Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI)/ ; EXC 2051 - Project-ID 390713860//German Research foundation/ ; SFB 1076 - Project Number 218627073//German Research foundation/ ; Project-ID 239748522 - CRC 1127 ChemBioSys//German Research foundation/ ; //Studienstiftung des Deutschen Volkes (Studienstiftung)/ ; //Landesgraduiertenstipendium/ ; //Jena School for Microbial Communications/ ; }, mesh = {*Phagocytosis ; *Cell Division ; Phylogeny ; Planctomycetales/genetics/classification/physiology/isolation &amp; purification ; RNA, Ribosomal, 16S/genetics ; }, abstract = {The unique cell biology presented by members of the phylum Planctomycetota has puzzled researchers ever since their discovery. Initially thought to have eukaryotic-like features, their traits are now recognized as exceptional but distinctly bacterial. However, recently discovered strains again added novel and stunning aspects to the planctomycetal cell biology-shapeshifting by members of the "Saltatorellus" clade to an extent that is unprecedented in any other bacterial phylum, and phagocytosis-like cell engulfment in the bacterium "Candidatus Uabimicrobium amorphum." These recent additions to the phylum Planctomycetota indicate hitherto unexplored members with unique cell biology, which we aimed to make accessible for further investigations. Targeting bacteria with features like "Ca. U. amorphum", we first studied both the morphology and behavior of this microorganism in more detail. While similar to eukaryotic amoeboid organisms at first sight, we found "Ca. U. amorphum" to be rather distinct in many regards. Presenting a detailed description of "Ca. U. amorphum," we furthermore found this organism to divide in a fashion that has never been described in any other organism. Employing the obtained knowledge, we isolated a second "bacterium of prey" from the harbor of Heligoland Island (North Sea, Germany). Our isolate shares key features with "Ca. U. amorphum": phagocytosis-like cell engulfment, surface-dependent motility, and the same novel mode of cell division. Being related to "Ca. U. amorphum" within genus thresholds, we propose the name "Ca. Uabimicrobium helgolandensis" for this strain.IMPORTANCE"Candidatus Uabimicrobium helgolandensis" HlEnr_7 adds to the explored bacterial biodiversity with its phagocytosis-like uptake of prey bacteria. Enrichment of this strain indicates that there might be "impossible" microbes out there, missed by metagenomic analyses. Such organisms have the potential to challenge our understanding of nature. For example, the origin of eukaryotes remains enigmatic, with a contentious debate surrounding both the mitochondrial host entity and the moment of uptake. Currently, favored models involve a proteobacterium as the mitochondrial progenitor and an Asgard archaeon as the fusion partner. Models in which a eukaryotic ancestor engulfed the mitochondrial ancestor via phagocytosis had been largely rejected due to bioenergetic constraints. Thus, the phagocytosis-like abilities of planctomycetal bacteria might influence the debate, demonstrating that prey engulfment is possible in a prokaryotic cellular framework.}, }
@article {pmid39189169, year = {2024}, author = {Hejazirad, SP and de Abreu, CM and Carneiro, GHF and Gomes, CR and Spinola Filho, PRC and da Costa, MR and Santos, JBD}, title = {The Impact of Metolachlor Applications and Phytoremediation Processes on Soil Microorganisms: Insights from Functional Metagenomics Analysis.}, journal = {Journal of xenobiotics}, volume = {14}, number = {3}, pages = {970-988}, pmid = {39189169}, issn = {2039-4713}, support = {PQD//National Council for Scientific and Technological Development/ ; 00097-22//Funda&#xe7;&#xe3;o de Amparo &#xe0; Pesquisa do Estado de Minas Gerais/ ; 001//Coordena&#xe7;&#xe3;o de Aperfeicoamento de Pessoal de N&#xed;vel Superior/ ; }, abstract = {This study assessed the impact of phytoremediation on reducing the residual concentration of metolachlor in soil treated with doses of 530.7 and 1061.4 g/ha and its effect on microbial biodiversity in contaminated areas. For the plant species Avena sativa and Medicago sativa, a significant efficacy of 54.5 and 36.4% was observed in the dissipation of the herbicide, especially at higher doses. Although metolachlor application reduced soil microbial biodiversity, phytoremediating plants, especially M. sativa, promoted greater richness and distribution of microbial species, mitigating the negative effects of the herbicide. Principal component analysis revealed the influence of these plants and metolachlor on the composition of the microbial community. These results highlight the importance of phytoremediation in promoting soil biodiversity and reducing herbicide contamination, providing crucial insights for remediation strategies in contaminated areas.}, }
@article {pmid39189041, year = {2024}, author = {Haussmann, AJ and McMahan, ZH and Volkmann, ER}, title = {Understanding the gastrointestinal microbiome in systemic sclerosis: methodological advancements and emerging research.}, journal = {Current opinion in rheumatology}, volume = {36}, number = {6}, pages = {401-409}, pmid = {39189041}, issn = {1531-6963}, support = {K23 HL150237/HL/NHLBI NIH HHS/United States ; }, mesh = {Humans ; *Scleroderma, Systemic/microbiology ; *Gastrointestinal Microbiome/physiology ; *Dysbiosis/microbiology ; Fecal Microbiota Transplantation/methods ; }, abstract = {PURPOSE OF REVIEW: This review highlights the role of the gastrointestinal (GI) microbiome in systemic sclerosis (SSc). We describe techniques for evaluating the GI microbiome in humans, and emerging research linking GI microbiome alterations (i.e., dysbiosis) and distinct SSc clinical manifestations. We also address the evolving treatment landscape targeting dysbiosis in SSc.<br><br>RECENT FINDINGS: Recent literature brings into focus the complex relationship between the GI microbiome and SSc pathogenesis. Advanced techniques (e.g., shotgun metagenomics, meta-transcriptomics) provide deeper insights into microbial taxonomy and active gene expression, exposing dysbiosis as a potential driver of SSc. New studies demonstrate that SSc patients who possess specific SSc clinical features, (e.g., interstitial lung disease), have unique GI microbiome profiles.<br><br>SUMMARY: Dysbiosis is associated with specific clinical features in patients with SSc. New tools for studying the GI microbiome have furthered our understanding of the relationship between dysbiosis and SSc complications. Therapeutic avenues such as dietary adjustments, probiotics, antibiotics, mindfulness practices, and fecal transplants offer potential for managing SSc and preventing its progression through GI microbiome modulation. By clarifying what is known about the relationship between the GI dysbiosis, GI dysfunction, and SSc, this review enhances our understanding of SSc pathogenesis and proposes targeted interventions.}, }
@article {pmid39187802, year = {2024}, author = {Anitua, E and Murias-Freijo, A and Tierno, R and Tejero, R and Alkhraisat, MH}, title = {Assessing peri-implant bacterial community structure: the effect of microbiome sample collection method.}, journal = {BMC oral health}, volume = {24}, number = {1}, pages = {1001}, pmid = {39187802}, issn = {1472-6831}, mesh = {Humans ; *Microbiota ; *Biofilms ; *Gingival Crevicular Fluid/microbiology ; *Dental Implants/microbiology ; Middle Aged ; Specimen Handling/methods ; Female ; Male ; High-Throughput Nucleotide Sequencing ; Bacteria/classification/isolation &amp; purification ; Aged ; }, abstract = {BACKGROUND: Oral microbiota comprises polymicrobial communities shaped by mutualistic coevolution with the host, contributing to homeostasis and regulating immune function. Nevertheless, dysbiosis of oral bacterial communities is associated with a number of clinical symptoms that ranges from infections to oral cancer. Peri-implant diseases are biofilm-associated inflammatory conditions affecting the soft and hard tissues around dental implants. Characterization and identification of the biofilm community are essential for the understanding of the pathophysiology of such diseases. For that sampling methods should be representative of the biofilm communities Therefore, there is a need to know the effect of different sampling strategies on the biofilm characterization by next generation sequencing.<br><br>METHODS: With the aim of selecting an appropriate microbiome sampling procedure for periimplant biofilms, next generation sequencing was used for characterizing the bacterial communities obtained by three different sampling strategies two months after transepithelial abutment placement: adjacent periodontal crevicular fluid (ToCF), crevicular fluid from transepithelial abutment (TACF) and transepithelial abutment (TA).<br><br>RESULTS: Significant differences in multiple alpha diversity indices were detected at both the OTU and the genus level between different sampling procedures. Differentially abundant taxa were detected between sample collection strategies, including peri-implant health and disease related taxa. At the community level significant differences were also detected between TACF and TA and also between TA and ToCF. Moreover, differential network properties and association patterns were identified.<br><br>CONCLUSIONS: The selection of sample collection strategy can significantly affect the community composition and structure.<br><br>TRIAL REGISTRATION: This research is part of a randomized clinical trial that was designed to assess the effect of transepithelial abutment surface on the biofilm formation. The trial was registered at Trial Registration ClinicalTrials.gov under the number NCT03554876.}, }
@article {pmid39186442, year = {2024}, author = {Chen, Y and Ma, W and Zhao, J and Stanton, C and Ross, RP and Zhang, H and Chen, W and Yang, B}, title = {Lactobacillus plantarum Ameliorates Colorectal Cancer by Ameliorating the Intestinal Barrier through the CLA-PPAR-γ Axis.}, journal = {Journal of agricultural and food chemistry}, volume = {72}, number = {36}, pages = {19766-19785}, doi = {10.1021/acs.jafc.4c02824}, pmid = {39186442}, issn = {1520-5118}, mesh = {*Lactobacillus plantarum/metabolism ; *PPAR gamma/metabolism/genetics ; Animals ; Mice ; *Colorectal Neoplasms/metabolism ; Humans ; *Probiotics/administration &amp; dosage/pharmacology ; Male ; *Linoleic Acids, Conjugated/pharmacology/metabolism ; *Mice, Inbred C57BL ; *Gastrointestinal Microbiome ; *Intestinal Mucosa/metabolism/microbiology ; Female ; NF-kappa B/metabolism/genetics ; Apoptosis/drug effects ; Claudin-1/metabolism/genetics ; Zonula Occludens-1 Protein/metabolism/genetics ; }, abstract = {Colorectal cancer (CRC) is the third-largest cancer worldwide. Lactobacillus can regulate the intestinal barrier and gut microbiota. However, the mechanisms of Lactobacillus that alleviate CRC remained unknown. This study aimed to explore the regulatory effect of Lactobacillus plantarum on CRC and its potential mechanism. CCFM8661 treatment significantly ameliorated CRC compared with phosphate-buffered solution (PBS) treatment in Apc[Min/+] mice. In addition, conjugated linoleic acid (CLA) was proved to be the key metabolite for CCFM8661 in ameliorating CRC by molecular biology techniques. Peroxisome proliferator-activated receptor γ (PPAR-γ) was proved to be the key receptor in ameliorating CRC by inhibitor intervention experiments. Moreover, supplementation with CCFM8661 ameliorated CRC by producing CLA to inhibit NF-κB pathway and pro-inflammatory cytokines, up-regulate ZO-1, Claudin-1, and MUC2, and promote tumor cell apoptosis in a PPAR-γ-dependent manner. Metagenomic analysis showed that CCFM8661 treatment significantly increased Odoribacter splanchnicus, which could ameliorate CRC by repairing the intestinal barrier. Clinical results showed that intestinal CLA, butyric acid, PPAR-γ, and Lactobacillus were significantly decreased in CRC patients, and these indicators were significantly negatively correlated with CRC. CCFM8661 alleviated CRC by ameliorating the intestinal barrier through the CLA-PPAR-γ axis. These results will promote the development of dietary probiotic supplements for CRC.}, }
@article {pmid39185682, year = {2024}, author = {Maqsood, R and Holland, LA and Wu, LI and Begnel, ER and Adhiambo, J and Owiti, P and Chohan, BH and Gantt, S and Kinuthia, J and Wamalwa, D and Ojee, E and Richardson, BA and Slyker, J and Lehman, DA and Lim, ES}, title = {Gut virome and microbiome dynamics before and after SARS-CoV-2 infection in women living with HIV and their infants.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2394248}, pmid = {39185682}, issn = {1949-0984}, support = {R01 HD092311/HD/NICHD NIH HHS/United States ; }, mesh = {Humans ; Female ; *COVID-19/microbiology/virology ; *HIV Infections/microbiology/virology ; *Virome ; *Gastrointestinal Microbiome ; *SARS-CoV-2/genetics/isolation &amp; purification ; Adult ; Infant, Newborn ; *Feces/microbiology/virology ; Infant ; Bacteria/classification/isolation &amp; purification/genetics ; Longitudinal Studies ; }, abstract = {Microbiome perturbations can have long-term effects on health. The dynamics of the gut microbiome and virome in women living with HIV (WLHIV) and their newborn infants is poorly understood. Here, we performed metagenomic sequencing analyses on longitudinal stool samples including 23 mothers (13 WLHIV, 10 HIV-negative) and 12 infants that experienced SARS-CoV-2 infection with mild disease, as well as 40 mothers (18 WLHIV, 22 HIV-negative) and 60 infants that remained SARS-CoV-2 seronegative throughout the study follow-up. Regardless of HIV or SARS-CoV-2 status, maternal bacterial and viral profiles were distinct from infants. Using linear mixed effects models, we showed that the microbiome alpha diversity trajectory was not significantly different between SARS-CoV-2 seropositive and seronegative women. However, seropositive women's positive trajectory while uninfected was abruptly reversed after SARS-CoV-2 infection (p = 0.015). Gut virome signatures of women were not associated with SARS-CoV-2. Alterations in infant microbiome and virome diversities were generally not impacted by SARS-CoV-2 but were rather driven by development. We did not find statistically significant interactions between HIV and SARS-CoV-2 on the gut microbiome and virome. Overall, our study provides insights into the complex interplay between maternal and infant bacterial microbiome, virome, and the influence of SARS-CoV-2 and HIV status.}, }
@article {pmid39185088, year = {2024}, author = {Hu, L and Xu, Y and Li, J and Zhang, M and Sun, Z and Ban, Y and Tian, X and Liu, D and Hu, L}, title = {Gut microbiome characteristics of women with hypothyroidism during early pregnancy detected by 16S rRNA amplicon sequencing and shotgun metagenomic.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1369192}, pmid = {39185088}, issn = {2235-2988}, mesh = {Humans ; Female ; Pregnancy ; *Hypothyroidism/microbiology ; *RNA, Ribosomal, 16S/genetics ; *Gastrointestinal Microbiome/genetics ; *Metagenomics/methods ; Adult ; *Dysbiosis/microbiology ; Bacteria/classification/genetics/isolation &amp; purification ; Pregnancy Complications/microbiology ; Metagenome ; Feces/microbiology ; }, abstract = {OBJECTIVE: This study aimed to explore the correlation between microbiota dysbiosis and hypothyroidism in early pregnancy by 16S rRNA amplicon sequencing combined with metagenomic sequencing.<br><br>METHODS: Sixty pregnant women (30 with hypothyroidism and 30 normal controls) were recruited for 16S rRNA amplicon sequencing, and 6 patients from each group were randomly selected for metagenomic sequencing to assess the gut microbiome profile.<br><br>RESULTS: The 16S rRNA results showed that beta-diversity in the hypothyroidism group was decreased. The relative abundances of the Prevotella and Paraprevotella genera increased in the hypothyroidism group, and Blautia predominated in the controls. The metagenomics results revealed that Prevotella_stercorea_CAG_629, Prevotella_hominis, Prevotella_sp_AM34_19LB, etc. were enriched in the hypothyroidism group at the species level. Functional analysis revealed that the pyridoxal 5'-phosphate synthase pdxT subunit module was decreased, and the short-chain fatty acid (SCFA) transporter and phospholipase/carboxylesterase modules were strongly enriched in the hypothyroidism group. Hypothyroidism patients had increased C-reactive protein (CRP), interleukin-2 (IL-2), IL-4, IL-10, and tumor necrosis factor (TNF)-&#x3b1; levels. The pyridoxal 5'-phosphate synthase pdxT subunit, the SCFA transporter, and the phospholipase/carboxylesterase module were associated with different Prevotella species.<br><br>CONCLUSION: In early pregnancy, women with hypothyroidism exhibit microbiota dysbiosis, and Prevotella may affect the metabolism of glutamate, SCFA, and phospholipases, which could be involved in the development of hypothyroidism during pregnancy.}, }
@article {pmid39185086, year = {2024}, author = {Wang, X and Xiao, T and Lu, M and Wu, Z and Chen, L and Zhang, Z and Lu, W}, title = {Lower respiratory tract microbiome and lung cancer risk prediction in patients with diffuse lung parenchymal lesions.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1410681}, pmid = {39185086}, issn = {2235-2988}, mesh = {Humans ; *Lung Neoplasms/microbiology/pathology ; Male ; Female ; *Microbiota ; Middle Aged ; *Bronchoalveolar Lavage Fluid/microbiology ; Retrospective Studies ; Aged ; Lung/microbiology/pathology/diagnostic imaging ; High-Throughput Nucleotide Sequencing ; Adult ; Respiratory System/microbiology ; Metagenomics/methods ; Risk Factors ; }, abstract = {OBJECTIVE: In clinical practice, imaging manifestations of diffuse lung parenchymal lesions are common and indicative of various diseases, making differential diagnosis difficult. Some of these lesions are eventually diagnosed as lung cancer.<br><br>METHODS: Because respiratory microorganisms play an important role in lung cancer development, we searched for microbial markers that could predict the risk of lung cancer by retrospectively analyzing the lower respiratory tract (LRT) microbiome of 158 patients who were hospitalized in the First Affiliated Hospital of Guangzhou Medical University (March 2021-March 2023) with diffuse lung parenchymal lesions. The final diagnosis was lung cancer in 21 cases, lung infection in 93 cases, and other conditions (other than malignancy and infections) in 44 cases. The patient's clinical characteristics and the results of metagenomic next-generation sequencing of bronchoalveolar lavage fluid (BALF) were analyzed.<br><br>RESULTS: Body mass index (BMI) and LRT microbial diversity (Shannon, Simpson, species richness, and Choa1 index) were significantly lower (P< 0.001, respectively) and Lactobacillus acidophilus relative abundance in the LRT was significantly higher (P< 0.001) in patients with lung cancer. The relative abundance of L. acidophilus in BALF combined with BMI was a good predictor of lung cancer risk (area under the curve = 0.985, accuracy = 98.46%, sensitivity = 95.24%, and specificity = 100.00%; P< 0.001).<br><br>CONCLUSION: Our study showed that an imbalance in the component ratio of the microbial community, diminished microbial diversity, and the presence of specific microbial markers in the LRT predicted lung cancer risk in patients with imaging manifestations of diffuse lung parenchymal lesions.}, }
@article {pmid39182818, year = {2024}, author = {Fang, C and Liu, KD and Tian, FJ and Li, JY and Li, SJ and Zhang, RM and Sun, J and Fang, LX and Ren, H and Wang, MG and Liao, XP}, title = {Metagenomic analysis unveiled the response of microbial community and antimicrobial resistome in natural water body to duck farm sewage.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {361}, number = {}, pages = {124784}, doi = {10.1016/j.envpol.2024.124784}, pmid = {39182818}, issn = {1873-6424}, mesh = {*Ducks ; Animals ; *Sewage/microbiology ; *Microbiota/drug effects ; Farms ; Metagenomics ; RNA, Ribosomal, 16S/genetics ; Environmental Monitoring ; Bacteria/genetics/drug effects ; Anti-Bacterial Agents/pharmacology ; }, abstract = {Sewages from duck farms are often recognized as a major source of antimicrobial resistance and pathogenic bacteria discharged to natural water bodies, but few studies depicted the dynamic changes in resistome and microbial communities in the rivers under immense exposure of sewage discharge. In this study, we investigated the ecological and environmental risks of duck sewages to the rivers that geographically near to the duck farms with short-distance (<1 km) using 16S rRNA amplicon and metagenomic sequencing. The results showed that a total of 20 ARG types were identified with abundances ranged from 0.61 to 1.33 cpc. Of note, the genes modulate resistances against aminoglycoside, bacitracin and beta-lactam were the most abundant ARGs. Limnohabitans, Fluviibacter and Cyanobium were the top 3 predominant genera in the microbial community. The alpha diversity of overall microbial community decrease while the abundance of pathogen increase during the input of sewage within 200 m. Sul1 and bacA were the dominant ARGs brought from duck farm sewage. The community variations of ARGs and microbiome were primarily driven by pH and temperature. Total phosphorus was significantly correlated to alpha diversity and top 30 ARGs subtype. Stochastic processes was the dominated microbial assembly pattern and did not be altered by sewage. We also highlighted the ecological risk caused by blaGES which possibly could be mitigated by Cyanobacteria, and the natural water body can purify partial ARGs as well as microbiome from duck farms sewage. These findings expanded our knowledge regarding the ecological risks by wastes from the livestock farm, and underscoring the necessity to monitor ARGs in farm-surrounding water bodies.}, }
@article {pmid39182764, year = {2024}, author = {Zhao, Y and Tan, J and Fang, L and Jiang, L}, title = {Harnessing meta-omics to unveil and mitigate methane emissions in ruminants: Integrative approaches and future directions.}, journal = {The Science of the total environment}, volume = {951}, number = {}, pages = {175732}, doi = {10.1016/j.scitotenv.2024.175732}, pmid = {39182764}, issn = {1879-1026}, mesh = {*Methane/metabolism ; Animals ; *Ruminants ; Metabolomics ; Metagenomics ; Air Pollutants/analysis ; Greenhouse Gases ; Rumen/metabolism ; Gastrointestinal Microbiome ; Genomics ; }, abstract = {Methane emissions from enteric fermentation present a dual challenge globally: they not only contribute significantly to atmospheric greenhouse gases but also represent a considerable energy loss for ruminant animals. Utilizing high-throughput omics technologies to analyze rumen microbiome samples (meta-omics, i.e., metagenomics, metatranscriptomics, metaproteomics, metabolomics) holds vast potential for uncovering the intricate interplay between diet, microbiota, and methane emissions in these animals. The primary obstacle is the effective integration of diverse meta-omic approaches and their broader application across different ruminant species. Genetic variability significantly impacts methane production in ruminants, suggesting that genomic selection could be a viable strategy to reduce emissions. While substantial research has been conducted on the microbiological aspects of methane production, there remains a critical need to delineate the specific genetic interactions between the host and its microbiome. Advancements in meta-omics technologies are poised to shed light on these interactions, enhancing our understanding of the genetic factors that govern methane output. This review explores the potential of meta-omics to accelerate genetic advancements that could lead to reduced methane emissions in ruminants. By employing a systems biology approach, the integration of various omics technologies allows for the identification of key genomic regions and genetic markers linked to methane production. These markers can then be leveraged in selective breeding programs to cultivate traits associated with lower emissions. Moreover, the review addresses current challenges in applying genomic selection for this purpose and discusses how omics technologies can overcome these obstacles. The systematic integration and analysis of diverse biological data provide deeper insights into the genetic underpinnings and overall biology of methane production traits in ruminants. Ultimately, this comprehensive approach not only aids in reducing the environmental impact of agriculture but also contributes to the sustainability and efficiency of livestock management.}, }
@article {pmid39182301, year = {2024}, author = {Peruzzo, A and Petrin, S and Boscolo Anzoletti, A and Mancin, M and Di Cesare, A and Sabatino, R and Lavagnolo, MC and Beggio, G and Baggio, G and Danesi, P and Barco, L and Losasso, C}, title = {The integration of omics and cultivation-dependent methods could effectively determine the biological risks associated with the utilization of soil conditioners in agriculture.}, journal = {Journal of hazardous materials}, volume = {478}, number = {}, pages = {135567}, doi = {10.1016/j.jhazmat.2024.135567}, pmid = {39182301}, issn = {1873-3336}, mesh = {*Agriculture ; *Soil Microbiology ; *Sewage/microbiology ; *Bacteria/genetics ; Soil/chemistry ; Composting ; Metagenomics ; Fertilizers ; }, abstract = {In the circular economy, reusing agricultural residues, treated biowaste, and sewage sludges-commonly referred to as soil conditioners-in agriculture is essential for converting waste into valuable resources. However, these materials can also contribute to the spread of antimicrobial-resistant pathogens in treated soils. In this study, we analyzed different soil conditioners categorized into five groups: compost from source-separated biowaste and green waste, agro-industrial digestate, digestate from anaerobic digestion of source-separated biowaste, compost from biowaste digestate, and sludges from wastewater treatment plants. Under Italian law, only the first two categories are approved for agricultural use, despite Regulation 1009/2019/EU allowing the use of digestate from anaerobic digestion of source-separated biowaste in CE-marked fertilizers. We examined the bacterial community and associated resistome of each sample using metagenomic approaches. Additionally, we detected and isolated various pathogens to provide a comprehensive understanding of the potential risks associated with sludge application in agriculture. The compost samples exhibited higher bacterial diversity and a greater abundance of potentially pathogenic bacteria compared to other samples, except for wastewater treatment plant sludges, which had the highest frequency of Salmonella isolation and resistome diversity. Our findings suggest integrating omics and cultivation-dependent methods to accurately assess the biological risks of using sludge in agriculture.}, }
@article {pmid39182227, year = {2024}, author = {Chilton, PM and Ghare, SS and Charpentier, BT and Myers, SA and Rao, AV and Petrosino, JF and Hoffman, KL and Greenwell, JC and Tyagi, N and Behera, J and Wang, Y and Sloan, LJ and Zhang, J and Shields, CB and Cooper, GE and Gobejishvili, L and Whittemore, SR and McClain, CJ and Barve, SS}, title = {Age-associated temporal decline in butyrate-producing bacteria plays a key pathogenic role in the onset and progression of neuropathology and memory deficits in 3×Tg-AD mice.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2389319}, pmid = {39182227}, issn = {1949-0984}, support = {P20 GM113226/GM/NIGMS NIH HHS/United States ; R01 AG061065/AG/NIA NIH HHS/United States ; U01 AA022618/AA/NIAAA NIH HHS/United States ; P50 AA024337/AA/NIAAA NIH HHS/United States ; U01 AA026936/AA/NIAAA NIH HHS/United States ; I01 CX002219/CX/CSRD VA/United States ; }, mesh = {Animals ; *Butyrates/metabolism ; *Gastrointestinal Microbiome ; Mice ; *Alzheimer Disease/microbiology/pathology/metabolism ; *Memory Disorders/microbiology/metabolism/pathology ; *Bacteria/classification/metabolism/genetics/isolation &amp; purification ; *Disease Models, Animal ; *Dysbiosis/microbiology ; Hippocampus/metabolism/pathology ; Mice, Transgenic ; Male ; Disease Progression ; Brain-Gut Axis/physiology ; Brain/metabolism/pathology ; }, abstract = {Alterations in the gut-microbiome-brain axis are increasingly being recognized to be involved in Alzheimer's disease (AD) pathogenesis. However, the functional consequences of enteric dysbiosis linking gut microbiota and brain pathology in AD progression remain largely undetermined. The present work investigated the causal role of age-associated temporal decline in butyrate-producing bacteria and butyrate in the etiopathogenesis of AD. Longitudinal metagenomics, neuropathological, and memory analyses were performed in the 3×Tg-AD mouse model. Metataxonomic analyses showed a significant temporal decline in the alpha diversity marked by a decrease in butyrate-producing bacterial communities and a concurrent reduction in cecal butyrate production. Inferred metagenomics analysis identified the bacterial acetyl-CoA pathway as the main butyrate synthesis pathway impacted. Concomitantly, there was an age-associated decline in the transcriptionally permissive acetylation of histone 3 at lysines 9 and 14 (H3K9/K14-Ac) in hippocampal neurons. Importantly, these microbiome-gut-brain changes preceded AD-related neuropathology, including oxidative stress, tau hyperphosphorylation, memory deficits, and neuromuscular dysfunction, which manifest by 17-18 months. Initiation of oral administration of tributyrin, a butyrate prodrug, at 6 months of age mitigated the age-related decline in butyrate-producing bacteria, protected the H3K9/K14-Ac status, and attenuated the development of neuropathological and cognitive changes associated with AD pathogenesis. These data causally implicate age-associated decline in butyrate-producing bacteria as a key pathogenic feature of the microbiome-gut-brain axis affecting the onset and progression of AD. Importantly, the regulation of butyrate-producing bacteria and consequent butyrate synthesis could be a significant therapeutic strategy in the prevention and treatment of AD.}, }
@article {pmid39182035, year = {2024}, author = {Velázquez-Fernández, JB and Aceves Suriano, CE and Thalasso, F and Montoya-Ciriaco, N and Dendooven, L}, title = {Structural and functional bacterial biodiversity in a copper, zinc and nickel amended bioreactor: shotgun metagenomic study.}, journal = {BMC microbiology}, volume = {24}, number = {1}, pages = {313}, pmid = {39182035}, issn = {1471-2180}, mesh = {*Bioreactors/microbiology ; *Zinc/metabolism ; *Nickel/metabolism ; *Bacteria/genetics/classification/metabolism/isolation &amp; purification ; *Metagenomics ; *Copper/metabolism ; *Biodiversity ; Wastewater/microbiology/chemistry ; }, abstract = {BACKGROUND: At lower concentrations copper (Cu), zinc (Zn) and nickel (Ni) are trace metals essential for some bacterial enzymes. At higher concentrations they might alter and inhibit microbial functioning in a bioreactor treating wastewater. We investigated the effect of incremental concentrations of Cu, Zn and Ni on the bacterial community structure and their metabolic functions by shotgun metagenomics. Metal concentrations reported in previous studies to inhibit bacterial metabolism were investigated.<br><br>RESULTS: At 31.5&#xa0;&#x3bc;M Cu, 112.4&#xa0;&#x3bc;M Ni and 122.3&#xa0;&#x3bc;M Zn, the most abundant bacteria were Achromobacter and Agrobacterium. When the metal concentration increased 2 or fivefold their abundance decreased and members of Delftia, Stenotrophomonas and Sphingomonas dominated. Although the heterotrophic metabolic functions based on the gene profile was not affected when the metal concentration increased, changes in the sulfur biogeochemical cycle were detected. Despite the large variations in the bacterial community structure when concentrations of Cu, Zn and Ni increased in the bioreactor, functional changes in carbon metabolism were small.<br><br>CONCLUSIONS: Community richness and diversity replacement indexes decreased significantly with increased metal concentration. Delftia antagonized Pseudomonas and members of Xanthomonadaceae. The relative abundance of most bacterial genes remained unchanged despite a five-fold increase in the metal concentration, but that of some EPS genes required for exopolysaccharide synthesis, and those related to the reduction of nitrite to nitrous oxide decreased which may alter the bioreactor functioning.}, }
@article {pmid39181304, year = {2024}, author = {Yu, Y and Ai, T and Huang, J and Jin, L and Yu, X and Zhu, X and Sun, J and Zhu, L}, title = {Metabolism of isodecyl diphenyl phosphate in rice and microbiome system: Differential metabolic pathways and underlying mechanisms.}, journal = {Environmental pollution (Barking, Essex : 1987)}, volume = {361}, number = {}, pages = {124803}, doi = {10.1016/j.envpol.2024.124803}, pmid = {39181304}, issn = {1873-6424}, mesh = {*Oryza/metabolism/microbiology ; *Microbiota ; *Rhizosphere ; Metabolic Networks and Pathways ; Soil Pollutants/metabolism ; Organophosphorus Compounds/metabolism ; Soil Microbiology ; Organophosphates/metabolism ; }, abstract = {Isodecyl diphenyl phosphate (IDDP) is among the emerging aromatic organophosphate esters (aryl-OPEs) that pose risks to both human beings and other organisms. This study aims to investigate the translocation and biotransformation behavior of IDDP in rice and the rhizosphere microbiome through hydroponic exposure (the duration of hydroponic exposure was 10 days). The rhizosphere microbiome 9-FY was found to efficiently eliminate IDDP, thereby reducing its uptake in rice tissues and mitigating the negative impact of IDDP on rice growth. Furthermore, this study proposed the first-ever transformation pathways of IDDP, identifying hydrolysis, hydroxylation, methylation, methoxylation, carboxylation, and glucuronidation products. Notably, the methylation and glycosylation pathways were exclusively observed in rice, indicating that the transformation of IDDP in rice may be more complex than in microbiome 9-FY. Additionally, the presence of the product COOH-IDDP in rice suggested that there might be an exchange of degradation products between rice and rhizobacteria, implying their potential interaction. This finding highlights the significance of rhizobacteria's role which cannot be overlooked in the accumulation and transformation of organic pollutants in grain crops. The study revealed active members in 9-FY during IDDP degradation, and metagenomic analysis indicated that most of the active populations contained IDDP-degrading genes. Moreover, transcriptome sequencing showed that cytochrome P450, acid phosphatase, glucosyltransferase, and methyltransferases genes in rice were up-regulated, which was further confirmed by RT-qPCR. This provides insight into the intermediate products identified in rice, such as hydrolysis, hydroxylated, glycosylated, and methylated products. These results significantly contribute to our understanding of the translocation and transformation of organophosphate esters (OPEs) in plants and the rhizosphere microbiome, and reveal the fate of OPEs in rice and microbiome system to ensure the paddy yield and rice safety.}, }
@article {pmid39181265, year = {2024}, author = {Dong, W and Zhou, J and Zhang, CJ and Yang, Q and Li, M}, title = {Methylotrophic substrates stimulated higher methane production than competitive substrates in mangrove sediments.}, journal = {The Science of the total environment}, volume = {951}, number = {}, pages = {175677}, doi = {10.1016/j.scitotenv.2024.175677}, pmid = {39181265}, issn = {1879-1026}, mesh = {*Methane/metabolism ; *Geologic Sediments/microbiology ; *Wetlands ; China ; Microbiota ; Bacteria/metabolism/classification ; }, abstract = {Although mangrove forests can uptake atmospheric CO2 and store carbon as organic matter called "blue carbon", it is also an important natural source of greenhouse gas methane. Methanogens are major contributors to methane and play important roles in the global carbon cycle. However, our understanding of the key microbes and metabolic pathways responsible for methanogenesis under specific substrates in mangrove sediments is still very limited. Here, we set an anaerobic incubation to evaluate the responses of methanogens in mangrove sediments from South China to the addition of diverse methanogenic substrates (H2/CO2, acetate, trimethylamine (TMA), and methanethiol (MT)) and further investigated the dynamics of the whole microbial community. Our results showed that diverse substrates stimulated methanogenic activities at different times. The stimulation of methanogenesis was more pronounced at early and late periods by the addition of methylotrophic substrates TMA and MT, respectively. The amplicon sequencing analysis showed that genus Methanococcoides was mainly responsible for TMA-utilized methanogenesis in mangrove sediment, while the multitrophic Methanococcus was most abundant in H2/CO2 and MT treatments. Apart from that, the bacteria enrichments of Syntrophotalea, Clostridium_sensu_stricto_12, Fusibacter in MT treatments might also be associated with the stimulation of methane production. In addition, the metagenomic analysis suggested that Methanosarcinaceae was also one of the key methanogens in MT treatments with different genomic information compared to that in TMA treatments. Finally, the total relative abundances of methanogenesis-related genes were also highest in TMA and MT treatments. These results will help advance our understanding of the contributions of different methanogenesis pathways and methanogens to methane emissions in mangrove sediments.}, }
@article {pmid39181210, year = {2025}, author = {Zhang, YH and Xie, R and Dai, CS and Gao, HW and Zhou, G and Qi, TT and Wang, WY and Wang, H and Cui, YM}, title = {Thyroid hormone receptor-beta agonist HSK31679 alleviates MASLD by modulating gut microbial sphingolipids.}, journal = {Journal of hepatology}, volume = {82}, number = {2}, pages = {189-202}, doi = {10.1016/j.jhep.2024.08.008}, pmid = {39181210}, issn = {1600-0641}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; Mice ; *Sphingolipids/metabolism ; Male ; *Thyroid Hormone Receptors beta/agonists ; Double-Blind Method ; Disease Models, Animal ; Humans ; *Non-alcoholic Fatty Liver Disease/drug therapy ; Mice, Inbred C57BL ; Specific Pathogen-Free Organisms ; }, abstract = {BACKGROUND &amp; AIMS: As the first approved medication for metabolic dysfunction-associated steatohepatitis (MASH), the thyroid hormone receptor-β (THR-β) agonist MGL-3196 (resmetirom) has garnered much attention as a liver-directed, bioactive oral drug. However, studies on MGL-3196 have also identified remarkable heterogeneity of individual clinical efficacy and its interference with gut microbiota in host hepatoenteral circulation remains to be elucidated.<br><br>METHODS: We compared MASH attenuation by MGL-3196 and its derivative drug HSK31679 between germ-free (GF) and specific-pathogen free (SPF) mice to evaluate the role of gut microbiota. Then cross-omics analyses of microbial metagenome, metabolome and single-cell RNA-sequencing were applied to a randomized, double-blind, placebo-controlled multiple ascending dose cohort receiving HSK31679 treatment (n&#xa0;= 32) or placebo (n&#xa0;= 8), to comprehensively investigate the altered gut microbiota metabolism and circulating immune signatures.<br><br>RESULTS: HSK31679 outperformed MGL-3196 in ameliorating MASH diet-induced steatohepatitis of SPF mice but not GF mice. In the multiple ascending dose cohort of HSK31679, the relative abundance of B.&#xa0;thetaiotaomicron was significantly enriched, impairing glucosylceramide synthase (GCS)-catalyzed monoglucosylation of microbial Cer(d18:1/16:0) and Cer(d18:1/24:1). In contrast to the non-inferior effect of MGL-3196 and HSK31679 on MASH resolution in GF[BT&#x394;GCS] mice, HSK31679 led to superior benefit on steatohepatitis in GF[BTWT] mice, due to its steric hindrance of R123 and Y401 of gut microbial GCS. For participants with high fecal GCS activity, the administration of 160&#xa0;mg HSK31679 induced a shift in peripheral compartments towards an immunosuppressive niche, characterized by decreased CD8&#x3b1;[+] dendritic cells and MINCLE[+] macrophages.<br><br>CONCLUSIONS: This study provided novel insights into the gut microbiota that are key to the efficacy of HSK31679 treatment, revealing microbial GCS as a potential predictive biomarker in MASH, as well as a new target for further microbiota-based treatment strategies for MASH.<br><br>IMPACT AND IMPLICATIONS: Remarkable heterogeneity in individual clinical efficacy of thyroid hormone receptor-&#x3b2; agonists and their interferences with the microbiome in host hepatoenteral circulation are poorly understood. In our current germ-free mouse models and a randomized, double-blind, multiple-dose cohort study, we identified microbial glucosylceramide synthase as a key mechanistic node in the resolution of metabolic dysfunction-associated steatohepatitis. Microbial glucosylceramide synthase activity could be a predictive biomarker of response to HSK31679 treatment or a new target for microbiota-based therapeutics in metabolic dysfunction-associated steatohepatitis.}, }
@article {pmid39180723, year = {2024}, author = {Jiang, L and Hao, Y and Han, D and Dong, W and Yang, A and Sun, Z and Ge, Y and Duan, S and Zhang, X and Dai, Z}, title = {Gut microbiota dysbiosis deteriorates immunoregulatory effects of tryptophan via colonic indole and LBP/HTR2B-mediated macrophage function.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39180723}, issn = {1751-7370}, support = {2022YFA1304204//National Key Research and Development Program of China/ ; 32072689//National Natural Science Foundation of China/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Dysbiosis/microbiology ; Mice ; *Colitis/chemically induced/immunology/microbiology ; *Tryptophan/metabolism ; *Indoles/pharmacology ; *Macrophages/immunology/drug effects ; *Mice, Inbred C57BL ; *Colon/microbiology/immunology ; *Disease Models, Animal ; *Carrier Proteins/genetics/metabolism ; *Dextran Sulfate ; Acute-Phase Proteins/metabolism ; Male ; Fecal Microbiota Transplantation ; Anti-Bacterial Agents/pharmacology ; Signal Transduction ; Membrane Glycoproteins ; }, abstract = {Tryptophan (Trp) has been shown to regulate immune function by modulating gut serotonin (5-HT) metabolism and signaling. However, the mechanisms underlying the microbial modulation of gut 5-HT signaling in gut inflammation with gut microbiota dysbiosis require further investigation. Here, we investigated the effects of Trp supplementation on the composition and metabolism of the gut microbiome and 5-HT signaling-related gut immune function using a dextran sodium sulfate (DSS)-induced colitis mouse model coupled with antibiotic exposure. The results showed that antibiotic treatment before but not during DSS treatment decreased the immunoregulatory effects of Trp and aggravated gut inflammation and body weight loss in mice. Metagenomic analysis revealed that the fecal microbiota transplantation of Trp-enriched gut microbiota to recipient mice subject to antibiotic pre-exposure and DSS treatment alleviated inflammation by increasing the relative abundances of Lactobacillus and Parabacteroides and the microbial production of indole coupled with the activation of the 5-HT receptor 2B (HTR2B) in the colon. Transcriptomic analysis showed that HTR2B agonist administration strengthened the beneficial effects of Trp in DSS-induced colitis mice with antibiotic exposure by reducing gut lipopolysaccharide-binding protein (LBP) production, IκB-α/nuclear factor-κB signaling, and M1 macrophage polarization. Indole treatment reduced LBP production and M1 macrophage polarization both in mice with DSS-induced colitis and in lipopolysaccharide-treated mouse macrophages; however, the HTR2B antagonist reversed the effects of indole. Our findings provide the basis for developing new dietary and therapeutic interventions to improve gut microbiota dysbiosis-associated inflammatory gut disorders and diseases.}, }
@article {pmid39180208, year = {2024}, author = {Wang, YC and Jiang, TM and Mo, L and Lu, HZ and Quan, LH and Zhong, P and Guan, Y}, title = {Distribution of Antibiotic-Resistant Genes in Intestines of Infants and Influencing Factors.}, journal = {Critical reviews in eukaryotic gene expression}, volume = {34}, number = {8}, pages = {59-73}, pmid = {39180208}, issn = {1045-4403}, mesh = {Humans ; Female ; *Feces/microbiology ; *Anti-Bacterial Agents/pharmacology ; *Milk, Human/microbiology ; Infant ; Infant, Newborn ; Intestines/microbiology ; Male ; Drug Resistance, Bacterial/genetics ; Genes, Bacterial ; Gastrointestinal Microbiome/genetics/drug effects ; Bacteria/genetics/drug effects ; Drug Resistance, Microbial/genetics ; }, abstract = {The objective of this study is to assess the prevalence of antibiotic-resistant genes (ARGs) in the intestines of infants and the factors affecting their distribution. Breast milk and infant stool samples were collected from nine full-term, healthy mother-infant pairs. The bacterial distribution and various types of ARGs present in the samples were analyzed using metagenomic next-generation sequencing. Over a period spanning from 2 to 240 d after birth, a total of 273 types of ARGs were identified in both infant feces and breast milk, exhibiting a trend of increasing prevalence over time. High concentrations of representative ARG populations were identified in the intestines of infants, especially at 12-15 d after birth. These populations included APH3-Ib, tetW/N/W, mphA, and Haemophilus influenzae PBP3, and multiple ARG Escherichia coli soxS that were resistant to common clinically used aminoglycoside, tetracycline, macrolide, and beta-lactam antibiotics. Gammaproteobacteria and Bacilli, especially Enterococcus, Staphylococcus, Acinetobacter, Streptococcus, and Escherichia were among the identified ARG carriers. Maternal age and body mass index (present and before pregnancy), infant sex, maternal consumption of probiotic yogurt during pregnancy, and lactation might be substantial factors influencing the occurrence of ARG-carrying bacteria and ARG distribution in the infant feces. These results indicate that environmental factors may influence the distribution of ARG-carrying bacteria and ARGs themselves in infants during early life. Providing appropriate recommendations regarding maternal age, body mass index during pregnancy, and use of probiotic products could potentially mitigate the transmission of antibiotic-resistant microbiota and ARGs, thereby diminishing the risk of antibiotic-resistant infections and safeguarding children's health.}, }
@article {pmid39180123, year = {2024}, author = {Horigan, S and Kettenburg, G and Kistler, A and Ranaivoson, HC and Andrianiaina, A and Andry, S and Raharinosy, V and Randriambolamanantsoa, TH and Tato, CM and Lacoste, V and Heraud, JM and Dussart, P and Brook, CE}, title = {Detection, characterization, and phylogenetic analysis of novel astroviruses from endemic Malagasy fruit bats.}, journal = {Virology journal}, volume = {21}, number = {1}, pages = {195}, pmid = {39180123}, issn = {1743-422X}, support = {DP2 AI171120/AI/NIAID NIH HHS/United States ; R01 AI129822/AI/NIAID NIH HHS/United States ; PREEMPT Program Cooperative Agreement no D18AC00031//Defense Sciences Office, DARPA/ ; GCE/ID OPP1211841//Bill and Melinda Gates Foundation/ ; 001/WHO_/World Health Organization/International ; 1R01A|129822-01/NH/NIH HHS/United States ; }, mesh = {Animals ; *Chiroptera/virology ; *Phylogeny ; *Astroviridae/genetics/isolation &amp; purification/classification ; *Astroviridae Infections/veterinary/virology/epidemiology ; *Metagenomics ; High-Throughput Nucleotide Sequencing ; Madagascar ; Genome, Viral/genetics ; Sequence Analysis, DNA ; }, abstract = {Bats (order: Chiroptera) are known to host a diverse range of viruses, some of which present a human public health risk. Thorough viral surveillance is therefore essential to predict and potentially mitigate zoonotic spillover. Astroviruses (family: Astroviridae) are an understudied group of viruses with a growing amount of indirect evidence for zoonotic transfer. Astroviruses have been detected in bats with significant prevalence and diversity, suggesting that bats may act as important astrovirus hosts. Most astrovirus surveillance in wild bat hosts has, to date, been restricted to single-gene PCR detection and concomitant Sanger sequencing; additionally, many bat species and many geographic regions have not yet been surveyed for astroviruses at all. Here, we use metagenomic Next Generation Sequencing (mNGS) to detect astroviruses in three species of Madagascar fruit bats, Eidolon dupreanum, Pteropus rufus, and Rousettus madagascariensis. We detect numerous partial sequences from all three species and one near-full length astrovirus sequence from Rousettus madagascariensis, which we use to characterize the evolutionary history of astroviruses both within bats and the broader mammalian clade, Mamastrovirus. Taken together, applications of mNGS implicate bats as important astrovirus hosts and demonstrate novel patterns of bat astrovirus evolutionary history, particularly in the Southwest Indian Ocean region.}, }
@article {pmid39180058, year = {2024}, author = {Hua, X and McGoldrick, J and Nakrour, N and Staller, K and Chung, DC and Xavier, RJ and Khalili, H}, title = {Gut microbiome structure and function in asymptomatic diverticulosis.}, journal = {Genome medicine}, volume = {16}, number = {1}, pages = {105}, pmid = {39180058}, issn = {1756-994X}, support = {P30 DK043351/DK/NIDDK NIH HHS/United States ; R01 AG068390/AG/NIA NIH HHS/United States ; DK043351//Center for the study of inflammatory bowel disease/ ; }, mesh = {Humans ; *Gastrointestinal Microbiome ; Male ; Female ; Middle Aged ; Aged ; Metagenomics/methods ; Colonoscopy ; Metagenome ; Bacteria/classification/genetics ; }, abstract = {BACKGROUND: Colonic diverticulosis, the most common lesion found in routine colonoscopy, affects more than 50% of individuals aged ≥ 60 years. Emerging evidence suggest that dysbiosis of gut microbiota may play an important role in the pathophysiology of diverticular disease. However, specific changes in microbial species and metabolic functions in asymptomatic diverticulosis remain unknown.<br><br>METHODS: In a cohort of US adults undergoing screening colonoscopy, we analyzed the gut microbiota using shotgun metagenomic sequencing. Demographic factors, lifestyle, and medication use were assessed using a baseline questionnaire administered prior to colonoscopy. Taxonomic structures and metabolic pathway abundances were determined using MetaPhlAn3 and HUMAnN3. We used multivariate association with linear models to identify microbial species and metabolic pathways that were significantly different between asymptomatic diverticulosis and controls, while adjusting for confounders selected a priori including age at colonoscopy, sex, body mass index (BMI), and dietary pattern.<br><br>RESULTS: Among 684 individuals undergoing a screening colonoscopy, 284 (42%) had diverticulosis. Gut microbiome composition explained 1.9% variation in the disease status of asymptomatic diverticulosis. We observed no significant differences in the overall diversity of gut microbiome between asymptomatic diverticulosis and controls. However, microbial species Bifidobacterium pseudocatenulatum and Prevotella copri were significantly enriched in controls (q value&#x2009;=&#x2009;0.19 and 0.14, respectively), whereas Roseburia intestinalis, Dorea sp. CAG:317, and Clostridium sp. CAG: 299 were more abundant in those with diverticulosis (q values&#x2009;=&#x2009;0.17, 0.24, and 0.10, respectively). We observed that the relationship between BMI and diverticulosis appeared to be limited to carriers of Bifidobacterium pseudocatenulatum and Roseburia intestinalis (Pinteraction&#x2009;=&#x2009;0.09).<br><br>CONCLUSIONS: Our study provides the first large-scale evidence supporting taxonomic and functional shifts of the gut microbiome in individuals with asymptomatic diverticulosis. The suggestive interaction between gut microbiota and BMI on prevalent diverticulosis deserves future investigations.}, }
@article {pmid39179206, year = {2024}, author = {Barone Lumaga, R and Tagliamonte, S and De Rosa, T and Valentino, V and Ercolini, D and Vitaglione, P}, title = {Consumption of a Sourdough-Leavened Croissant Enriched with a Blend of Fibers Influences Fasting Blood Glucose in a Randomized Controlled Trial in Healthy Subjects.}, journal = {The Journal of nutrition}, volume = {154}, number = {10}, pages = {2976-2987}, doi = {10.1016/j.tjnut.2024.08.015}, pmid = {39179206}, issn = {1541-6100}, mesh = {Humans ; *Dietary Fiber/administration &amp; dosage/pharmacology ; Male ; Female ; *Blood Glucose/analysis ; Adult ; *Bread/analysis ; Gastrointestinal Microbiome ; Middle Aged ; Fasting ; Young Adult ; Healthy Volunteers ; Diet ; }, abstract = {BACKGROUND: An incorrect lifestyle, including diet, is responsible for the worldwide dramatic increase in obesity and type 2 diabetes. Increasing dietary fiber consumption may lead to health benefits, and reformulation of bakery products may be a strategy to globally improve the diet.<br><br>OBJECTIVES: This study aimed to assess the impact of a 2-wk breakfast consumption with a sourdough-leavened croissant containing a blend of dietary fiber from 10 sources (4.8 g/100 g, croissant enriched with dietary fibers [FIBCRO]), compared with a control croissant (dietary fibers 1.3 g/100 g, CONCRO) on daily energy intake, appetite, metabolic variables, and the gut microbiome.<br><br>METHODS: Thirty-two healthy participants were randomly allocated to 2 groups consuming FIBCRO or CONCRO. Participants self-recorded their diet and appetite through 7-d weighted food diaries and visual analog scales every day over the 2 wk. At baseline and after the intervention, fasting blood and urine samples, and fecal samples were collected beside blood pressure, anthropometry, and body composition. Serum glucose, lipids, C-reactive protein, and insulin according to the official methods and serum dipeptidyl peptidase-4 (DPPIV) activity by photometric method were measured. Polyphenols and urolithins in urines were analyzed by Liquid chromatography-tandem mass spectrometry (LC/MS/MS), whereas gut microbiome in feces by shotgun metagenomics.<br><br>RESULTS: FIBCRO consumption improved fasting blood glucose compared with CONCRO (mean changes from baseline -2.0 mg/dL in FIBCRO compared with +3.1 mg/dL in CONCRO, P = 0.022), also reducing serum DPPIV activity by 1.7 IU/L (P = 0.01) and increasing urinary excretion of urolithin A-sulfate by 6.9 ng/mg creatinine (P = 0.04) compared with baseline. No further changes in any of the monitored variables or in the gut microbiome were detected.<br><br>CONCLUSIONS: Results suggested that a 2-wk consumption of a sourdough croissant claimed as "source of dietary fiber" improved fasting glycemia compared with a conventional sourdough croissant in healthy subjects. The reduced serum DPPIV activity and increased bioavailability of urolithin likely contributed to determine that effect independently from gut microbiome changes. This trial was registered at clinicaltrials.gov as NCT04999280.}, }
@article {pmid39179139, year = {2024}, author = {Gao, N and Zhuang, Y and Zheng, Y and Li, Y and Wang, Y and Zhu, S and Fan, M and Tian, W and Jiang, Y and Wang, Y and Cui, M and Suo, C and Zhang, T and Jin, L and Chen, X and Xu, K}, title = {Investigating the link between gut microbiome and bone mineral density: The role of genetic factors.}, journal = {Bone}, volume = {188}, number = {}, pages = {117239}, doi = {10.1016/j.bone.2024.117239}, pmid = {39179139}, issn = {1873-2763}, mesh = {Humans ; *Bone Density/genetics ; Female ; *Gastrointestinal Microbiome/genetics ; Male ; Middle Aged ; Aged ; *Osteoporosis/genetics/microbiology ; Feces/microbiology ; }, abstract = {Osteoporosis is a complex metabolic bone disease that severely undermines the quality of life and overall health of the elderly. While previous studies have established a close relationship between gut microbiome and host bone metabolism, the role of genetic factors has received less scrutiny. This research aims to identify potential taxa associated with various bone mineral density states, incorporating assessments of genetic factors. Fecal microbiome profiles from 605 individuals (334 females and 271 males) aged 55-65 from the Taizhou Imaging Study with osteopenia (n = 270, 170 women) or osteoporosis (n = 94, 85 women) or normal (n = 241, 79 women) were determined using shotgun metagenomic sequencing. The linear discriminant analysis was employed to identify differentially enriched taxa. Utilizing the Kyoto Encyclopedia of Genes and Genomes for annotation, functional pathway analysis was conducted to identify differentially metabolic pathways. Polygenic risk score for osteoporosis was estimated to represent genetic susceptibility to osteoporosis, followed by stratification and interaction analyses. Gut flora diversity did not show significant differences among various bone mineral groups. After multivariable adjustment, certain species, such as Clostridium leptum, Fusicatenibacter saccharivorans and Roseburia hominis, were enriched in osteoporosis patients. Statistically significant interactions between the polygenic risk score and taxa Roseburia faecis, Megasphaera elsdenii were observed (P for interaction = 0.005, 0.018, respectively). Stratified analyses revealed a significantly negative association between Roseburia faecis and bone mineral density in the low-genetic-risk group (β = -0.045, P < 0.05), while Turicimonas muris was positively associated with bone mineral density in the high-genetic-risk group (β = 4.177, P < 0.05) after multivariable adjustments. Functional predictions of the gut microbiome indicated an increase in pathways related to structural proteins in high-genetic-risk patients, while low-genetic-risk patients exhibited enrichment in enzyme-related pathways. This study emphasizes the association between gut microbes and bone mass, offering new insights into the interaction between genetic background and gut microbiome.}, }
@article {pmid39178987, year = {2024}, author = {Shukla, V and Singh, S and Verma, S and Verma, S and Rizvi, AA and Abbas, M}, title = {Targeting the microbiome to improve human health with the approach of personalized medicine: Latest aspects and current updates.}, journal = {Clinical nutrition ESPEN}, volume = {63}, number = {}, pages = {813-820}, doi = {10.1016/j.clnesp.2024.08.005}, pmid = {39178987}, issn = {2405-4577}, mesh = {Humans ; *Precision Medicine ; *Fecal Microbiota Transplantation ; *Gastrointestinal Microbiome ; *Probiotics/therapeutic use ; *Prebiotics ; *Dysbiosis/therapy ; Microbiota ; Synbiotics ; }, abstract = {The intricate ecosystem of microorganisms residing within and on the human body, collectively known as the microbiome, significantly influences human health. Imbalances in this microbiome, referred to as dysbiosis, have been associated with various diseases, prompting the exploration of novel therapeutic approaches. Personalized medicine, Tailors treatments to individual patient characteristics, offers a promising avenue for addressing microbiome-related health issues. This review highlights recent developments in utilizing personalized medicine to target the microbiome, aiming to enhance health outcomes. Noteworthy strategies include fecal microbiota transplantation (FMT), where healthy donor microbes are transferred to patients, showing promise in treating conditions such as recurrent Clostridium difficile infection. Additionally, probiotics, which are live microorganisms similar to beneficial gut inhabitants, and prebiotics, non-digestible compounds promoting microbial growth, are emerging as tools to restore microbiome balance. The integration of these approaches, known as synbiotics, enhances microbial colonization and therapeutic effects. Advances in metagenomics and sequencing technologies provide the means to understand individual microbiome profiles, enabling tailored interventions. This paper aims to present the latest insights in leveraging personalized medicine to address microbiome-related health concerns, envisioning a future where microbiome-based therapies reshape disease management and promote human health.}, }
@article {pmid39178591, year = {2024}, author = {Gao, FZ and Hu, LX and Liu, YS and Qiao, LK and Chen, ZY and Su, JQ and He, LY and Bai, H and Zhu, YG and Ying, GG}, title = {Unveiling the overlooked small-sized microbiome in river ecosystems.}, journal = {Water research}, volume = {265}, number = {}, pages = {122302}, doi = {10.1016/j.watres.2024.122302}, pmid = {39178591}, issn = {1879-2448}, mesh = {*Rivers/microbiology ; *Microbiota ; *Ecosystem ; Metagenomics ; Bacteria/genetics ; }, abstract = {Enriching microorganisms using a 0.22-μm pore size is a general pretreatment procedure in river microbiome research. However, it remains unclear the extent to which this method loses microbiome information. Here, we conducted a comparative metagenomics-based study on microbiomes with sizes over 0.22 μm (large-sized) and between 0.22 μm and 0.1 μm (small-sized) in a subtropical river. Although the absolute concentration of small-sized microbiome was about two orders of magnitude lower than that of large-sized microbiome, sequencing only large-sized microbiome resulted in a significant loss of microbiome diversity. Specifically, the microbial community was different between two sizes, and 347 genera were only detected in small-sized microbiome. Small-sized microbiome had much more diverse viral community than large-sized fraction. The viruses had abundant ecological functions and were hosted by 825 species of 169 families, including pathogen-related families. Small-sized microbiome had distinct antimicrobial resistance risks from large-sized microbiome, showing an enrichment of eight antibiotic resistance gene (ARG) types as well as the detection of 140 unique ARG subtypes and five enriched risk rank I ARGs. Draft genomes of five major resistant pathogens having diverse ecological and pollutant-degrading functions were only assembled in small-sized microbiome. These findings provide novel insights into river ecosystems, and highlight the overlooked small-sized microbiome in the environment.}, }
@article {pmid39178288, year = {2024}, author = {Buscaglia, M and Iriarte, JL and Schulz, F and Díez, B}, title = {Adaptation strategies of giant viruses to low-temperature marine ecosystems.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39178288}, issn = {1751-7370}, support = {21190726//ANID/ ; DG_06-20//INACH/ ; RT_04-19//INACH/ ; RT_05-18//INACH/ ; //CONA-SHOA CIMAR 25F/ ; AUB1900003//ANID/ ; ANID-FONDAP 1523A0002//Center for Climate and Resilience Research/ ; ANID-MILENIO-ICN2021_044//Millennium Institute Center for Genome Regulation/ ; ANID/FONDAP/151500003//Center for Dynamic Research on High Latitude Marine Ecosystems/ ; }, mesh = {*Cold Temperature ; *Seawater/virology ; *Ecosystem ; Antarctic Regions ; Arctic Regions ; *Genome, Viral ; *Metagenome ; Giant Viruses/genetics/classification/isolation &amp; purification ; Phylogeny ; Adaptation, Physiological ; }, abstract = {Microbes in marine ecosystems have evolved their gene content to thrive successfully in the cold. Although this process has been reasonably well studied in bacteria and selected eukaryotes, less is known about the impact of cold environments on the genomes of viruses that infect eukaryotes. Here, we analyzed cold adaptations in giant viruses (Nucleocytoviricota and Mirusviricota) from austral marine environments and compared them with their Arctic and temperate counterparts. We recovered giant virus metagenome-assembled genomes (98 Nucleocytoviricota and 12 Mirusviricota MAGs) from 61 newly sequenced metagenomes and metaviromes from sub-Antarctic Patagonian fjords and Antarctic seawater samples. When analyzing our data set alongside Antarctic and Arctic giant viruses MAGs already deposited in the Global Ocean Eukaryotic Viral database, we found that Antarctic and Arctic giant viruses predominantly inhabit sub-10°C environments, featuring a high proportion of unique phylotypes in each ecosystem. In contrast, giant viruses in Patagonian fjords were subject to broader temperature ranges and showed a lower degree of endemicity. However, despite differences in their distribution, giant viruses inhabiting low-temperature marine ecosystems evolved genomic cold-adaptation strategies that led to changes in genetic functions and amino acid frequencies that ultimately affect both gene content and protein structure. Such changes seem to be absent in their mesophilic counterparts. The uniqueness of these cold-adapted marine giant viruses may now be threatened by climate change, leading to a potential reduction in their biodiversity.}, }
@article {pmid39178040, year = {2024}, author = {Liu, L and Feng, T and Liu, Q and Liao, M and Liu, B and Li, M}, title = {Characterization of the vaginal microbiota in infertile women with repeated implantation failure.}, journal = {Acta microbiologica et immunologica Hungarica}, volume = {71}, number = {3}, pages = {263-271}, doi = {10.1556/030.2024.02323}, pmid = {39178040}, issn = {1588-2640}, mesh = {Humans ; Female ; *Vagina/microbiology ; Adult ; *Infertility, Female/microbiology ; *Microbiota ; *Bacteria/classification/isolation &amp; purification/genetics ; Embryo Implantation ; Pregnancy ; Fertilization in Vitro ; }, abstract = {Although the relationship between vaginal microorganisms and fertility has been well established, only few studies have investigated vaginal microorganisms in women undergoing in vitro fertilization (IVF). Our aim was to study the differences in vaginal microbiota between infertile women with repeated implantation failure (RIF) and those who achieved clinical pregnancy in their first frozen embryo transfer cycle. We compared the vaginal microbiota of patients with a history of RIF (n = 37) with that of the control group (n = 43). Following DNA extraction, metagenomic sequencing was employed for the analysis of alpha and beta diversities, distinctions in bacterial species, and the functional annotation of microbial genes. Furthermore, disparities between the two groups were revealed. Alpha diversity analysis revealed that the Shannon index was higher in the RIF group (P < 0.05). There were differences in the beta diversity between groups (P = 0.16). At the bacterial family level, the relative abundance of Actinomycetaceae (P = 0.013) and Ruminococcaceae (P = 0.013) were significantly higher in the RIF group. At the genus level, the abundances of Actinomyces (P = 0.028) and Subdoligranulum (P = 0.013) were significantly higher in the RIF group. At the species level, the abundances of Prevotella timonensis (P = 0.028), Lactobacillus jensenii (P = 0.049), and Subdoligranulum (P = 0.013) were significantly higher in the RIF group. Significant differences in family, genus, species, alpha and beta diversity were observed in the vaginal microbiota between groups. Notably, among these findings, the Subdoligranulum genus emerged as the most prominent correlating factor.}, }
@article {pmid39177227, year = {2024}, author = {Deng, Y and Nong, Z and Wei, M and Xu, Y and Luo, Y and Li, X and Zhao, R and Yang, Z and Pan, L}, title = {Characteristics and function of the gut microbiota in patients with IgA nephropathy via metagenomic sequencing technology.}, journal = {Renal failure}, volume = {46}, number = {2}, pages = {2393754}, pmid = {39177227}, issn = {1525-6049}, mesh = {Humans ; *Glomerulonephritis, IGA/microbiology ; *Gastrointestinal Microbiome/genetics ; Male ; Female ; Adult ; *Feces/microbiology ; *Metagenomics/methods ; Case-Control Studies ; Middle Aged ; Moraxella/isolation &amp; purification/genetics ; Escherichia coli/isolation &amp; purification/genetics ; Acinetobacter/isolation &amp; purification/genetics ; Metagenome ; Young Adult ; }, abstract = {OBJECTIVE: The aim of this study was to investigate the characteristics and related functional pathways of the gut microbiota in patients with IgA nephropathy (IgAN) through metagenomic sequencing technology.<br><br>METHODS: We enrolled individuals with primary IgAN, including patients with normal and abnormal renal function. Additionally, we recruited healthy volunteers as the healthy control group. Stool samples were collected, and species and functional annotation were performed through fecal metagenome sequencing. We employed linear discriminant analysis effect size (LEfSe) analysis to identify significantly different bacterial microbiota and functional pathways. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was used to annotate microbiota functions, and redundancy analysis (RDA) was performed to analyze the factors affecting the composition and distribution of the gut microbiota.<br><br>RESULTS: LEfSe analysis revealed differences in the gut microbiota between IgAN patients and healthy controls. The characteristic microorganisms in the IgAN group were classified as Escherichia coli, with a significantly greater abundance than that in the healthy control group (p&#x2009;<&#x2009;0.05). The characteristic microorganisms in the IgAN group with abnormal renal function were identified as Enterococcaceae, Moraxella, Moraxella, and Acinetobacter. KEGG functional analysis demonstrated that the functional pathways of the microbiota that differed between IgAN patients and healthy controls were related primarily to bile acid metabolism.<br><br>CONCLUSIONS: The status of the gut microbiota is closely associated not only with the onset of IgAN but also with the renal function of IgAN patients. The characteristic gut microbiota may serve as a promising diagnostic biomarker and therapeutic target for IgAN.}, }
@article {pmid39175129, year = {2025}, author = {Hotchkiss, MZ and Forrest, JRK and Poulain, AJ}, title = {Changes in bumblebee queen gut microbiotas during and after overwintering diapause.}, journal = {Insect molecular biology}, volume = {34}, number = {1}, pages = {136-150}, pmid = {39175129}, issn = {1365-2583}, support = {//Natural Sciences and Engineering Research Council of Canada/ ; }, mesh = {Animals ; Bees/microbiology/physiology ; *Gastrointestinal Microbiome ; *Diapause, Insect ; Female ; Seasons ; }, abstract = {Bumblebees are key pollinators with gut microbiotas that support host health. After bumblebee queens undergo winter diapause, which occurs before spring colony establishment, their gut microbiotas are disturbed, but little is known about community dynamics during diapause itself. Queen gut microbiotas also help seed worker microbiotas, so it is important that they recover post-diapause to a typical community structure, a process that may be impeded by pesticide exposure. We examined how bumblebee queen gut microbiota community structure and metabolic potential shift during and after winter diapause, and whether post-diapause recovery is affected by pesticide exposure. To do so, we placed commercial Bombus impatiens queens into diapause, euthanizing them at 0, 2 and 4 months of diapause. Additionally, we allowed some queens to recover from diapause for 1 week before euthanasia, exposing half to the common herbicide glyphosate. Using whole-community, shotgun metagenomic sequencing, we found that core bee gut phylotypes dominated queen gut microbiotas before, during and after diapause, but that two phylotypes, Schmidhempelia and Snodgrassella, ceased to be detected during late diapause and recovery. Despite fluctuations in taxonomic community structure, metabolic potential remained constant through diapause and recovery. Also, glyphosate exposure did not affect post-diapause microbiota recovery. However, metagenomic assembly quality and our ability to detect microbial taxa and metabolic pathways declined alongside microbial abundance, which was substantially reduced during diapause. Our study offers new insights into how bumblebee queen gut microbiotas change taxonomically and functionally during a key life stage and provides guidance for future microbiota studies in diapausing bumblebees.}, }
@article {pmid39175056, year = {2024}, author = {Sbardellati, DL and Vannette, RL}, title = {Targeted viromes and total metagenomes capture distinct components of bee gut phage communities.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {155}, pmid = {39175056}, issn = {2049-2618}, support = {2023-67011-40501//U.S. Department of Agriculture/ ; 1929516//National Science Foundation/ ; }, mesh = {Bees/virology/microbiology ; Animals ; *Bacteriophages/genetics/isolation &amp; purification/classification ; *Virome ; *Metagenome ; Gastrointestinal Microbiome/genetics ; Metagenomics/methods ; Gastrointestinal Tract/microbiology/virology ; }, abstract = {BACKGROUND: Despite being among the most abundant biological entities on earth, bacteriophage (phage) remain an understudied component of host-associated systems. One limitation to studying host-associated phage is the lack of consensus on methods for sampling phage communities. Here, we compare paired total metagenomes and viral size fraction metagenomes (viromes) as methods for investigating the dsDNA viral communities associated with the GI tract of two bee species: the European honey bee Apis mellifera and the eastern bumble bee Bombus impatiens.<br><br>RESULTS: We find that viromes successfully enriched for phage, thereby increasing phage recovery, but only in honey bees. In contrast, for bumble bees, total metagenomes recovered greater phage diversity. Across both bee species, viromes better sampled low occupancy phage, while total metagenomes were biased towards sampling temperate phage. Additionally, many of the phage captured by total metagenomes were absent altogether from viromes. Comparing between bees, we show that phage communities in commercially reared bumble bees are significantly reduced in diversity compared to honey bees, likely reflecting differences in bacterial titer and diversity. In a broader context, these results highlight the complementary nature of total metagenomes and targeted viromes, especially when applied to host-associated environments.<br><br>CONCLUSIONS: Overall, we suggest that studies interested in assessing total communities of host-associated phage should consider using both approaches. However, given the constraints of virome sampling, total metagenomes may serve to sample phage communities with the understanding that they will preferentially sample dominant and temperate phage. Video Abstract.}, }
@article {pmid39174663, year = {2024}, author = {Jafari, M and Moghimi, H and Tirandaz, H and Ebrahim-Habibi, MB}, title = {Corrosion behavior of predominant Halodesulfovibrio in a marine SRB consortium and its mitigation using ZnO nanoparticles.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {19545}, pmid = {39174663}, issn = {2045-2322}, mesh = {Corrosion ; *Zinc Oxide/chemistry/pharmacology ; *Biofilms/drug effects ; *Bioreactors/microbiology ; Steel/chemistry ; Nanoparticles/chemistry ; Microbial Consortia/drug effects ; }, abstract = {Formation of Sulfate Reducing Bacteria (SRB) biofilm accelerates microbiologically influenced corrosion (MIC). The aim of this study was to investigate both the corrosivity of a marine SRB consortium on carbon steel coupons and its mitigation in the presence of ZnO. Metagenomics analysis revealed that Halodesulfovibrio (78.9%) was predominant and could be related to MIC. The analysis also showed a remarkable shift from a highly corrosive SRB consortium in the control bioreactors to a far less corrosive consortium when ZnO was added to the bioreactors. Further results indicated that the corrosion rate of the SRB consortium was 8.17 mpy on the carbon steel coupons. In the ZnO-treated bioreactors, the count of SRB and MIC in the carbon steel coupons simultaneously reduced. Moreover, Confocal Laser Scanning Microscopy and profilometry analysis determined that ZnO could significantly decrease the amount of biofilm and the corrosion rate. Electrochemical experiments revealed higher corrosion current density (icorr) and lower charge transfer resistance (Rct) in the control bioreactors relative to the ZnO-treated bioreactors. We introduce Halodesulfovibrio as a potentially important corrosive genus in a marine SRB consortium. Additionally, ZnO could be considered a proper candidate to control the corrosion induced by Halodesulfovibrio.}, }
@article {pmid39173973, year = {2024}, author = {Oliver, A and Alkan, Z and Stephensen, CB and Newman, JW and Kable, ME and Lemay, DG}, title = {Diet, Microbiome, and Inflammation Predictors of Fecal and Plasma Short-Chain Fatty Acids in Humans.}, journal = {The Journal of nutrition}, volume = {154}, number = {11}, pages = {3298-3311}, pmid = {39173973}, issn = {1541-6100}, mesh = {Adult ; Female ; Humans ; Male ; Middle Aged ; Young Adult ; Biomarkers/blood ; Cohort Studies ; *Diet ; *Fatty Acids, Volatile/metabolism/blood ; *Feces/microbiology/chemistry ; *Gastrointestinal Microbiome ; *Inflammation/blood ; }, abstract = {BACKGROUND: Gut microbes produce short-chain fatty acids (SCFAs), which are associated with broad health benefits. However, it is not fully known how diet and/or the gut microbiome could be modulated to improve SCFA production.<br><br>OBJECTIVES: The objective of this study was to identify dietary, inflammatory, and/or microbiome predictors of SCFAs in a cohort of healthy adults.<br><br>METHODS: SCFAs were measured in fecal and plasma samples from 359 healthy adults in the United States Department of Agriculture Nutritional Phenotyping Study. Habitual and recent diet was assessed using a Food Frequency Questionnaire and Automated Self-Administered 24-h Dietary Assesment Tool dietary recalls. Markers of systemic and gut inflammation were measured in fecal and plasma samples. The gut microbiome was assessed using shotgun metagenomics. Using statistics and machine learning, we determined how the abundance and composition of SCFAs varied with measures of diet, inflammation, and the gut microbiome.<br><br>RESULTS: We show that fecal pH may be a good proxy for fecal SCFA abundance. A higher Healthy Eating Index for a habitual diet was associated with a compositional increase in fecal butyrate relative to acetate and propionate. SCFAs were associated with markers of subclinical gastrointestinal (GI) inflammation. Fecal SCFA abundance was inversely related to plasma lipopolysaccharide-binding protein. When we analyzed hierarchically organized diet and microbiome data with taxonomy-aware algorithms, we observed that diet and microbiome features were far more predictive of fecal SCFA abundances compared to plasma SCFA abundances. The top diet and microbiome predictors of fecal butyrate included potatoes and the thiamine biosynthesis pathway, respectively.<br><br>CONCLUSIONS: These results suggest that resistant starch in the form of potatoes and microbially produced thiamine provide a substrate and essential cofactor, respectively, for butyrate synthesis. Thiamine may be a rate-limiting nutrient for butyrate production in adults. Overall, these findings illustrate the complex biology underpinning SCFA production in the gut. This trial was registered at clinicaltrials.gov as NCT02367287.}, }
@article {pmid39173234, year = {2024}, author = {Jia, P and Liang, JL and Lu, JL and Zhong, SJ and Xiong, T and Feng, SW and Wang, Y and Wu, ZH and Yi, XZ and Gao, SM and Zheng, J and Wen, P and Li, F and Li, Y and Liao, B and Shu, WS and Li, JT}, title = {Soil keystone viruses are regulators of ecosystem multifunctionality.}, journal = {Environment international}, volume = {191}, number = {}, pages = {108964}, doi = {10.1016/j.envint.2024.108964}, pmid = {39173234}, issn = {1873-6750}, mesh = {*Soil Microbiology ; China ; *Ecosystem ; *Viruses/genetics ; Soil/chemistry ; Microbiota ; Fungi/genetics ; Forests ; Metagenomics ; Biodiversity ; }, abstract = {Ecosystem multifunctionality reflects the capacity of ecosystems to simultaneously maintain multiple functions which are essential bases for human sustainable development. Whereas viruses are a major component of the soil microbiome that drive ecosystem functions across biomes, the relationships between soil viral diversity and ecosystem multifunctionality remain under-studied. To address this critical knowledge gap, we employed a combination of amplicon and metagenomic sequencing to assess prokaryotic, fungal and viral diversity, and to link viruses to putative hosts. We described the features of viruses and their potential hosts in 154 soil samples from 29 farmlands and 25 forests distributed across China. Although 4,460 and 5,207 viral populations (vOTUs) were found in the farmlands and forests respectively, the diversity of specific vOTUs rather than overall soil viral diversity was positively correlated with ecosystem multifunctionality in both ecosystem types. Furthermore, the diversity of these keystone vOTUs, despite being 10-100 times lower than prokaryotic or fungal diversity, was a better predictor of ecosystem multifunctionality and more strongly associated with the relative abundances of prokaryotic genes related to soil nutrient cycling. Gemmatimonadota and Actinobacteria dominated the host community of soil keystone viruses in the farmlands and forests respectively, but were either absent or showed a significantly lower relative abundance in that of soil non-keystone viruses. These findings provide novel insights into the regulators of ecosystem multifunctionality and have important implications for the management of ecosystem functioning.}, }
@article {pmid39168909, year = {2025}, author = {Wang, X and Li, Y and Kang, L and Zhang, Z and Zhang, D and Li, P and Zhang, Q and Ma, X and Wang, J and Hou, Y and Li, Q and Fu, J and Hong, M}, title = {Diversity, functions, and antibiotic resistance genes of bacteria and fungi are examined in the bamboo plant phyllosphere that serve as food for the giant pandas.}, journal = {International microbiology : the official journal of the Spanish Society for Microbiology}, volume = {28}, number = {4}, pages = {751-763}, pmid = {39168909}, issn = {1618-1905}, support = {2019QZKK05010502//by the Second Qinghai-Tibet Plateau Comprehensive Scientific Survey/ ; KCXTD2022-7//the Innovation Team Funds of China West Normal University/ ; }, mesh = {*Ursidae/microbiology ; *Fungi/genetics/drug effects/classification/isolation &amp; purification ; *Bacteria/genetics/drug effects/classification/isolation &amp; purification ; Animals ; RNA, Ribosomal, 16S/genetics ; Anti-Bacterial Agents/pharmacology ; *Drug Resistance, Microbial/genetics ; *Poaceae/microbiology ; Biodiversity ; Gastrointestinal Microbiome ; }, abstract = {The phyllosphere of bamboo is rich in microorganisms that can disrupt the intestinal microbiota of the giant pandas that consume them, potentially leading to their death. In the present study, the abundance, diversity, biological functions (e.g., KEGG and CAZyme), and antibiotic resistance genes (ARGs) of bacteria and fungi in two bamboo species phyllosphere (Chimonobambusa szechuanensis, CS; Bashania fangiana, BF) in Daxiangling Nature Reserve (an important part of the Giant Panda National Park) were investigated respectively by amplicon sequencing of the whole 16S rRNA and ITS1-ITS2 genes on PacBio Sequel and whole-metagenome shotgun sequencing on Illumina NovaSeq 6000 platform. The results suggested that there were respectively 18 bacterial and 34 fungi biomarkers between the phyllosphere of the two species of bamboo. Beta diversity of bacteria and fungi communities exited between the two bamboos according to the (un)weighted UniFrac distance matrix. Moreover, the functional analysis showed that the largest relative abundance was found in the genes related to metabolism and global and overview maps. Glycoside hydrolases (GHs) and glycosyl transferases (GTs) have a higher abundance in two bamboo phyllospheres. Co-occurrence network modeling suggested that bacteria and fungi communities in CS phyllosphere employed a much more complex metabolic network than that in BF, and the abundance of multidrug, tetracycline, and glycopeptide resistance genes was higher and closely correlated with other ARGs. This study references the basis for protecting bamboo resources foraged by wild giant pandas and predicts the risk of antibiotic resistance in bamboo phyllosphere bacterial and fungal microbiota in the Giant Panda National Park, China.}, }
@article {pmid39168346, year = {2024}, author = {Li, J and Li, C and Han, Y and Yang, J and Hu, Y and Xu, H and Zhou, Y and Zuo, J and Tang, Y and Lei, C and Li, C and Wang, H}, title = {Bacterial membrane vesicles from swine farm microbial communities harboring and safeguarding diverse functional genes promoting horizontal gene transfer.}, journal = {The Science of the total environment}, volume = {951}, number = {}, pages = {175639}, doi = {10.1016/j.scitotenv.2024.175639}, pmid = {39168346}, issn = {1879-1026}, mesh = {*Gene Transfer, Horizontal ; Animals ; Swine ; Farms ; Microbiota ; Bacteria/genetics ; Feces/microbiology ; Drug Resistance, Microbial/genetics ; Wastewater/microbiology ; Drug Resistance, Bacterial/genetics ; Soil Microbiology ; Genes, Bacterial ; }, abstract = {Antibiotic resistance (AMR) poses a significant global health challenge, with swine farms recognized as major reservoirs of antibiotic resistance genes (ARGs). Recently, bacterial membrane vesicles (BMVs) have emerged as novel carriers mediating horizontal gene transfer. However, little is known about the ARGs carried by BMVs in swine farm environments and their transfer potential. This study investigated the distribution, sources, and microbiological origins of BMVs in three key microbial habitats of swine farms (feces, soil, and fecal wastewater), along with the ARGs and mobile genetic elements (MGEs) they harbor. Characterization of BMVs revealed particle sizes ranging from 20 to 500 nm and concentrations from 10[8] to 10[12] particles/g, containing DNA and proteins. Metagenomic sequencing identified BMVs predominantly composed of members of the Proteobacteria phyla, including Pseudomonadaceae, Moraxellaceae, and Enterobacteriaceae, carrying diverse functional genes encompassing resistance to 14 common antibiotics and 74,340 virulence genes. Notably, multidrug resistance, tetracycline, and chloramphenicol resistance genes were particularly abundant. Furthermore, BMVs harbored various MGEs, primarily plasmids, and demonstrated the ability to protect their DNA cargo from degradation and facilitate horizontal gene transfer, including the transmission of resistance genes. In conclusion, this study reveals widespread presence of BMVs carrying ARGs and potential virulence genes in swine farm feces, soil, and fecal wastewater. These findings not only provide new insights into the role of extracellular DNA in the environment but also highlight concerns regarding the gene transfer potential mediated by BMVs and associated health risks.}, }
@article {pmid39167702, year = {2024}, author = {Prins, FM and Hidding, IJ and Klaassen, MAY and Collij, V and Schultheiss, JPD and Uniken Venema, WTC and Bangma, A and Aardema, JB and Jansen, BH and Mares, WGN and Witteman, BJM and Festen, EAM and Dijkstra, G and Visschedijk, MC and Fidder, HH and Vich Vila, A and Oldenburg, B and Gacesa, R and Weersma, RK}, title = {Limited predictive value of the gut microbiome and metabolome for response to biological therapy in inflammatory bowel disease.}, journal = {Gut microbes}, volume = {16}, number = {1}, pages = {2391505}, pmid = {39167702}, issn = {1949-0984}, mesh = {*Gastrointestinal Microbiome/drug effects ; Humans ; *Inflammatory Bowel Diseases/drug therapy/microbiology/metabolism ; *Metabolome/drug effects ; *Ustekinumab/therapeutic use ; Prospective Studies ; *Antibodies, Monoclonal, Humanized/therapeutic use/pharmacology ; *Feces/microbiology ; Female ; Male ; Adult ; Biological Therapy/methods ; Treatment Outcome ; Middle Aged ; Bacteria/genetics/classification/metabolism/drug effects/isolation &amp; purification ; Biomarkers/analysis/metabolism ; }, abstract = {Emerging evidence suggests the gut microbiome's potential in predicting response to biologic treatments in patients with inflammatory bowel disease (IBD). In this prospective study, we aimed to predict treatment response to vedolizumab and ustekinumab, integrating clinical data, gut microbiome profiles based on metagenomic sequencing, and untargeted fecal metabolomics. We aimed to identify predictive biomarkers and attempted to replicate microbiome-based signals from previous studies. We found that the predictive utility of the gut microbiome and fecal metabolites for treatment response was marginal compared to clinical features alone. Testing our identified microbial ratios in an external cohort reinforced the lack of predictive power of the microbiome. Additionally, we could not confirm previously published predictive signals observed in similar sized cohorts. Overall, these findings highlight the importance of external validation and larger sample sizes, to better understand the microbiome's impact on therapy outcomes in the setting of biologicals in IBD before potential clinical implementation.}, }
@article {pmid39166878, year = {2024}, author = {Lu, Q and Zhu, R and Zhou, L and Zhang, R and Li, Z and Xu, P and Wang, Z and Wu, G and Ren, J and Jiao, D and Song, Y and Li, J and Wang, W and Liang, R and Ma, X and Sun, Y}, title = {Gut dysbiosis contributes to the development of Budd-Chiari syndrome through immune imbalance.}, journal = {mSystems}, volume = {9}, number = {9}, pages = {e0079424}, pmid = {39166878}, issn = {2379-5077}, support = {81870457//MOST | National Natural Science Foundation of China (NSFC)/ ; 82172944//MOST | National Natural Science Foundation of China (NSFC)/ ; 81900558//MOST | National Natural Science Foundation of China (NSFC)/ ; 232102311048//Key science and technology project s of Henan Province/ ; }, mesh = {*Dysbiosis/microbiology/immunology ; *Gastrointestinal Microbiome/physiology ; *Budd-Chiari Syndrome/immunology/microbiology/pathology ; Humans ; Animals ; Mice ; Male ; Case-Control Studies ; Female ; *Cytokines/metabolism/immunology/genetics ; Adult ; Fecal Microbiota Transplantation ; Middle Aged ; }, abstract = {UNLABELLED: Budd-Chiari syndrome (B-CS) is a rare and lethal condition characterized by hepatic venous outflow tract blockage. Gut microbiota has been linked to numerous hepatic disorders, but its significance in B-CS pathogenesis is uncertain. First, we performed a case-control study (Ncase = 140, Ncontrol = 63) to compare the fecal microbiota of B-CS and healthy individuals by metagenomics sequencing. B-CS patients' gut microbial composition and activity changed significantly, with a different metagenomic makeup, increased potentially pathogenic bacteria, including Prevotella, and disease-linked microbial function. Imbalanced cytokines in patients were demonstrated to be associated with gut dysbiosis, which led us to suspect that B-CS is associated with gut microbiota and immune dysregulation. Next, 16S ribosomal DNA sequencing on fecal microbiota transplantation (FMT) mice models examined the link between gut dysbiosis and B-CS. FMT models showed damaged liver tissues, posterior inferior vena cava, and increased Prevotella in the disturbed gut microbiota of FMT mice. Notably, B-CS-FMT impaired the morphological structure of colonic tissues and increased intestinal permeability. Furthermore, a significant increase of the same cytokines (IL-5, IL-6, IL-9, IL-10, IL-17A, IL-17F, and IL-13) and endotoxin levels in B-CS-FMT mice were observed. Our study suggested that gut microbial dysbiosis may cause B-CS through immunological dysregulation.<br><br>IMPORTANCE: This study revealed that gut microbial dysbiosis may cause Budd-Chiari syndrome (B-CS). Gut dysbiosis enhanced intestinal permeability, and toxic metabolites and imbalanced cytokines activated the immune system. Consequently, the escalation of causative factors led to their concentration in the portal vein, thereby compromising both the liver parenchyma and outflow tract. Therefore, we proposed that gut microbial dysbiosis induced immune imbalance by chronic systemic inflammation, which contributed to the B-CS development. Furthermore, Prevotella may mediate inflammation development and immune imbalance, showing potential in B-CS pathogenesis.}, }
@article {pmid39166873, year = {2024}, author = {Kwan, S-Y and Sabotta, CM and Cruz, LR and Wong, MC and Ajami, NJ and McCormick, JB and Fisher-Hoch, SP and Beretta, L}, title = {Gut phageome in Mexican Americans: a population at high risk for metabolic dysfunction-associated steatotic liver disease and diabetes.}, journal = {mSystems}, volume = {9}, number = {9}, pages = {e0043424}, pmid = {39166873}, issn = {2379-5077}, support = {P50 CA217674/CA/NCI NIH HHS/United States ; UL1 TR000371/TR/NCATS NIH HHS/United States ; }, mesh = {Humans ; Male ; Female ; *Gastrointestinal Microbiome/genetics ; *Bacteriophages/genetics ; Middle Aged ; *Virome/genetics ; *Mexican Americans ; *Fatty Liver/genetics ; Cross-Sectional Studies ; Adult ; Diabetes Mellitus ; Feces/microbiology/virology ; Aged ; }, abstract = {Mexican Americans are disproportionally affected by metabolic dysfunction-associated steatotic liver disease (MASLD), which often co-occurs with diabetes. Despite extensive evidence on the causative role of the gut microbiome in MASLD, studies determining the involvement of the gut phageome are scarce. In this cross-sectional study, we characterized the gut phageome in Mexican Americans of South Texas by stool shotgun metagenomic sequencing of 340 subjects, concurrently screened for liver steatosis by transient elastography. Inter-individual variations in the phageome were associated with gender, country of birth, diabetes, and liver steatosis. The phage signatures for diabetes and liver steatosis were subsequently determined. Enrichment of Inoviridae was associated with both diabetes and liver steatosis. Diabetes was further associated with the enrichment of predominantly temperate Escherichia phages, some of which possessed virulence factors. Liver steatosis was associated with the depletion of Lactococcus phages r1t and BK5-T, and enrichment of the globally prevalent Crassvirales phages, including members of genus cluster IX (Burzaovirus coli, Burzaovirus faecalis) and VI (Kahnovirus oralis). The Lactococcus phages showed strong correlations and co-occurrence with Lactococcus lactis, while the Crassvirales phages, B. coli, B. faecalis, and UAG-readthrough crAss clade correlated and co-occurred with Prevotella copri. In conclusion, we identified the gut phageome signatures for two closely linked metabolic diseases with significant global burden. These phage signatures may have utility in risk modeling and disease prevention in this high-risk population, and identification of potential bacterial targets for phage therapy.IMPORTANCEPhages influence human health and disease by shaping the gut bacterial community. Using stool samples from a high-risk Mexican American population, we provide insights into the gut phageome changes associated with diabetes and liver steatosis, two closely linked metabolic diseases with significant global burden. Common to both diseases was an enrichment of Inoviridae, a group of phages that infect bacterial hosts chronically without lysis, allowing them to significantly influence bacterial growth, virulence, motility, biofilm formation, and horizontal gene transfer. Diabetes was additionally associated with the enrichment of Escherichia coli-infecting phages, some of which contained virulence factors. Liver steatosis was additionally associated with the depletion of Lactococcus lactis-infecting phages, and enrichment of Crassvirales phages, a group of virulent phages with high global prevalence and persistence across generations. These phageome signatures may have utility in risk modeling, as well as identify potential bacterial targets for phage therapy.}, }
@article {pmid39164259, year = {2024}, author = {Seong, HJ and Kim, JJ and Kim, T and Ahn, SJ and Rho, M and Lee, KJ and Sul, WJ}, title = {Recovery of 240 metagenome-assembled genomes from coastal mariculture environments in South Korea.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {902}, pmid = {39164259}, issn = {2052-4463}, mesh = {Republic of Korea ; *Metagenome ; *Aquaculture ; Animals ; Bacteria/genetics/classification ; Microbiota ; Ostreidae/microbiology ; Archaea/genetics ; Pectinidae/microbiology/genetics ; Penaeidae/microbiology/genetics ; }, abstract = {The mariculture industry has seen a rapid expansion in recent years due to the increasing global demand for seafood. However, the industry faces challenges from climate change and increased pathogen pressure. Additionally, the chemicals used to enhance mariculture productivity are changing ocean ecosystems. This study analyzed 36 surface-water metagenomes from South Korean mussel, oyster, scallop, and shrimp farms to expand our understanding of aquaculture microbial genetic resources and the potential impacts of these anthropogenic inputs. We recovered 240 non-redundant species-level metagenome-assembled genomes (MAGs), comprising 224 bacteria, 13 archaea, and three eukaryotes. Most MAGs were assigned to Proteobacteria, Bacteroidota, and Actinobacteriota, with 40.7% remaining unclassified at the species level. Among the three eukaryotic MAGs, one was identified as a novel lineage of green algae, highlighting the uncharacterized genetic diversity in mariculture environments. Additionally, 22 prokaryotic MAGs harbored 26 antibiotic and metal resistance genes, with MAGs carrying beta-lactamases being particularly prevalent in most farms. The obtained microbiome data from mariculture environments can be utilized in future studies to foster healthy, sustainable mariculture practices.}, }
@article {pmid39163860, year = {2024}, author = {Torres, MDT and Brooks, EF and Cesaro, A and Sberro, H and Gill, MO and Nicolaou, C and Bhatt, AS and de la Fuente-Nunez, C}, title = {Mining human microbiomes reveals an untapped source of peptide antibiotics.}, journal = {Cell}, volume = {187}, number = {19}, pages = {5453-5467.e15}, doi = {10.1016/j.cell.2024.07.027}, pmid = {39163860}, issn = {1097-4172}, mesh = {Humans ; Animals ; Mice ; *Anti-Bacterial Agents/pharmacology ; *Microbiota/drug effects ; *Antimicrobial Peptides/pharmacology/chemistry ; Metagenome ; Female ; Open Reading Frames ; Bacteria/drug effects/genetics/classification ; Prevotella/drug effects ; }, abstract = {Drug-resistant bacteria are outpacing traditional antibiotic discovery efforts. Here, we computationally screened 444,054 previously reported putative small protein families from 1,773 human metagenomes for antimicrobial properties, identifying 323 candidates encoded in small open reading frames (smORFs). To test our computational predictions, 78 peptides were synthesized and screened for antimicrobial activity in vitro, with 70.5% displaying antimicrobial activity. As these compounds were different compared with previously reported antimicrobial peptides, we termed them smORF-encoded peptides (SEPs). SEPs killed bacteria by targeting their membrane, synergizing with each other, and modulating gut commensals, indicating a potential role in reconfiguring microbiome communities in addition to counteracting pathogens. The lead candidates were anti-infective in both murine skin abscess and deep thigh infection models. Notably, prevotellin-2 from Prevotella copri presented activity comparable to the commonly used antibiotic polymyxin B. Our report supports the existence of hundreds of antimicrobials in the human microbiome amenable to clinical translation.}, }
@article {pmid39163656, year = {2024}, author = {Sun, F and Yang, H and Zhang, X and Tan, F and Wang, G and Shi, Q}, title = {Significant response of coral-associated bacteria and their carbohydrate-active enzymes diversity to coral bleaching.}, journal = {Marine environmental research}, volume = {201}, number = {}, pages = {106694}, doi = {10.1016/j.marenvres.2024.106694}, pmid = {39163656}, issn = {1879-0291}, mesh = {Animals ; *Anthozoa/microbiology ; *Bacteria/genetics/enzymology ; Symbiosis ; Microbiota ; }, abstract = {Analysis of bacterial carbohydrate-active enzymes (CAZymes) contributes significantly to comprehending the response exhibited by coral symbionts to the external environment. This study explored the impact of bleaching on the bacteria and their CAZymes in coral Favites sp. through metagenomic sequencing. Notably, principal coordinates analysis (PCoA) unveiles substantial difference in bacterial communities between bleached and unbleached corals. Proteobacteria, Actinobacteria, Acidobacteria, Bacteroidota, and Chloroflexi, exhibit noteworthy alterations during coral bleaching. CAZymes profiles in bleached coral disclosed a significant increase in Glycosyltransferases (GTs) abundance, suggesting an intensified biosynthesis of polysaccharides. Conversely, there is a marked reduction in other CAZymes abundance in bleached coral. Proteobacteria, Bacteroidota, Chlorobi, and Planctomycetota exhibit greater contributions to CAZymes in bleached corals, with Rhodobacterales, Cytophagales, Burkholderiales, Caulobacterales, and Hyphomicrobiales being the main contributors. While Acidobacteria, Actinobacteria, and Chloroflexi demonstrate higher contributions to CAZymes in unbleached corals. The changes in bacteria and their CAZymes reflect the ecological adaptability of coral holobionts when facing environmental stress. The alterations in CAZymes composition caused by bleaching events may have profound impacts on coral nutrient absorption and ecosystem stability. Therefore, understanding the dynamic changes in CAZymes is crucial for assessing the health and recovery potential of coral ecosystems.}, }
@article {pmid39163484, year = {2024}, author = {Dede, B and Reeves, EP and Walter, M and Bach, W and Amann, R and Meyerdierks, A}, title = {Bacterial chemolithoautotrophy in ultramafic plumes along the Mid-Atlantic Ridge.}, journal = {The ISME journal}, volume = {18}, number = {1}, pages = {}, pmid = {39163484}, issn = {1751-7370}, support = {EXC-309-49926684//Deutsche Forschungsgemeinschaft/ ; //Norwegian Research Council/ ; 179560//University of Bergen Centre for Geobiology/ ; //Max Planck Society/ ; }, mesh = {*Hydrothermal Vents/microbiology ; Atlantic Ocean ; *RNA, Ribosomal, 16S/genetics ; *Bacteria/genetics/classification/isolation &amp; purification ; *Chemoautotrophic Growth ; *Seawater/microbiology ; Microbiota ; Hydrogen/metabolism ; Phylogeny ; Sulfur/metabolism ; Oxidation-Reduction ; In Situ Hybridization, Fluorescence ; Carbon Dioxide/metabolism ; }, abstract = {Hydrothermal vent systems release reduced chemical compounds that act as an important energy source in the deep sea. Chemolithoautotrophic microbes inhabiting hydrothermal plumes oxidize these compounds, in particular, hydrogen and reduced sulfur, to obtain the energy required for CO2 fixation. Here, we analysed the planktonic communities of four hydrothermal systems located along the Mid-Atlantic Ridge: Irinovskoe, Semenov-2, Logatchev-1, and Ashadze-2, by combining long-read 16S rRNA gene analysis, fluorescence in situ hybridization, meta-omics, and thermodynamic calculations. Sulfurimonas and SUP05 dominated the microbial communities in these hydrothermal plumes. Investigation of Sulfurimonas and SUP05 MAGs, and their gene transcription in plumes indicated a niche partitioning driven by hydrogen and sulfur. In addition to sulfur and hydrogen oxidation, a novel SAR202 clade inhabiting the plume, here referred to as genus Carboxydicoccus, harbours the capability for CO oxidation and CO2 fixation via reverse TCA cycle. Both pathways were also highly transcribed in other hydrogen-rich plumes, including the Von Damm vent field. Carboxydicoccus profundi reached up to 4% relative abundance (1.0 x 103 cell ml- 1) in Irinovskoe non-buoyant plume and was also abundant in non-hydrothermally influenced deep-sea metagenomes (up to 5 RPKM). Therefore, CO, which is probably not sourced from the hydrothermal fluids (1.9-5.8 μM), but rather from biological activities within the rising fluid, may serve as a significant energy source in hydrothermal plumes. Taken together, this study sheds light on the chemolithoautotrophic potential of the bacterial community in Mid-Atlantic Ridge plumes.}, }
@article {pmid39162524, year = {2024}, author = {Hu, F and Cheng, Y and Fan, B and Li, W and Ye, B and Wu, Z and Tan, Z and He, Z}, title = {Ruminal microbial metagenomes and host transcriptomes shed light on individual variability in the growth rate of lambs before weaning: the regulated mechanism and potential long-term effect on the host.}, journal = {mSystems}, volume = {9}, number = {9}, pages = {e0087324}, pmid = {39162524}, issn = {2379-5077}, support = {XDA26040304, XDA26050102//strategic priority research program/ ; 32072760//MOST | National Natural Science Foundation of China (NSFC)/ ; 2022JJ10054//HSTD | Natural Science Foundation of Hunan Province/ ; 2022JBGS0023//the Inner Mongolia major technology project/ ; 2019RS3021//Innovation province project/ ; }, mesh = {Animals ; *Weaning ; Sheep/growth &amp; development/microbiology ; *Rumen/microbiology/metabolism ; *Transcriptome ; *Metagenome ; Female ; Gastrointestinal Microbiome/physiology ; Amino Acids/metabolism/blood ; Liver/metabolism ; Fermentation ; }, abstract = {UNLABELLED: Weaning weight is a reflection of management during the breastfeeding phase and will influence animal performance in subsequent phases, considered important indicators within production systems. The aims of this study were as follows: (i) to investigate variability in the growth rate among individual lambs from ewes rearing single or twin lambs fed with two different diets and (ii) to explore the molecular mechanisms regulating the growth rate and the potential long-term effects on the host. No significant change in lamb average daily gain (ADG) was observed in litter size and diet treatment, and there were large variations among individual lambs (ranging from 0.13 to 0.41 kg/day). Further analysis was conducted on serum amino acids, rumen fermentation characteristics, rumen metagenomics and transcriptome, and hepatic transcriptome of lambs with extremely high (HA; n = 6) and low (LA; n = 6) ADG. We observed significant increases in serum lysine, leucine, alanine, and phenylalanine in the HA group. The metagenome revealed that the HA group presented a higher rumen propionate molar proportion via increasing gene abundance in the succinate pathway for propionate synthesis. For the rumen transcriptome, higher expressed gene sets in the HA group were mainly related to rumen epithelial growth, including cytokine-cytokine receptor interaction, Jak-STAT signaling pathway, and adherens junction. For the liver transcriptome, the upregulated KEGG pathways in the HA group were primarily associated with fatty acid degradation, glyoxylate and dicarboxylate metabolism, cholesterol metabolism, and the immune system. This research suggests that preweaning lambs with high ADG may benefit from rumen development and enhanced liver metabolic and immune function.<br><br>IMPORTANCE: There is accumulating evidence indicating that the early-life rumen microbiome plays vital roles in rumen development and microbial fermentation, which subsequently affects the growth of young ruminants. The liver is also vital to regulate the metabolism and distribution of nutrients. Our results demonstrate that lambs with high average daily gain (ADG) enhanced microbial volatile fatty acid (VFA) metabolism toward rumen propionate and serum amino acid (AA) production to support host growth. The study highlights that high ADG in the preweaning period is beneficial for the rumen development and liver energy metabolism, leading to better growth later in life. Overall, this study explores the molecular mechanisms regulating the growth rate and the potential long-term effects of increased growth rate on the host metabolism, providing fundamental knowledge about nutrient manipulation in pre-weaning.}, }
@article {pmid39162518, year = {2024}, author = {Hu, D and Zhang, T and He, S and Pu, T and Yin, Y and Hu, Y}, title = {Mining metagenomic data to gain a new insight into the gut microbial biosynthetic potential in placental mammals.}, journal = {Microbiology spectrum}, volume = {12}, number = {10}, pages = {e0086424}, pmid = {39162518}, issn = {2165-0497}, support = {32370552//MOST | National Natural Science Foundation of China (NSFC)/ ; 32070414,32325010//MOST | National Natural Science Foundation of China (NSFC)/ ; }, mesh = {Animals ; *Gastrointestinal Microbiome/genetics ; *Metagenomics ; *Mammals/microbiology ; *Metagenome ; *Multigene Family ; Bacteria/genetics/classification/metabolism ; Polyketides/metabolism ; Data Mining ; Biological Products/metabolism ; Female ; Biosynthetic Pathways/genetics ; }, abstract = {Mammals host a remarkable diversity and abundance of gut microbes. Biosynthetic gene clusters (BGCs) in microbial genomes encode biologically active chemical products and play an important role in microbe-host interactions. Traditionally, the exploration of gut microbial metabolic functions has relied on the pure culture method. However, given the limited amounts of microbes being cultivated, insights into the metabolism of gut microbes in mammals continued to be very limited. In this study, we adopted a computational pipeline for mining the metagenomic data (named taxonomy-guided identification of biosynthetic gene clusters, TaxiBGC) to identify experimentally verified BGCs in 373 metagenomes across 53 mammalian species in an unbiased manner. We demonstrated that polyketides (PKs) and nonribosomal peptides (NRPs) are representative of mammals, and the products derived from them were associated with cell-cell communication and resistance to inflammation. Large carnivores had the highest number of BGCs, followed by large herbivores and small mammals. We also observed that the large mammals had more common BGCs that aid in the biosynthesis of a variety of natural products. However, small mammals not only had fewer BGCs but were also unique to each species. Our results provide novel insights into the mining of metagenomic data sets to identify active BGCs and their products across mammals.IMPORTANCEThe gut microbes host numerous biosynthetic gene clusters (BGCs) that biosynthesize natural products and impact the host's physiology. Historically, our understanding of BGCs in mammalian gut microbes was largely based on studies on cultured isolates; however, only a small fraction of mammal-associated microbes have been investigated. The biochemical diversity of the mammalian gut microbiota is poorly understood. Metagenomic sequencing contains data from a vast number of organisms and provides information on the total gene content of communities. Unfortunately, the existing BGC prediction tools are designed for individual microbial genomes. Recently, a BGC prediction tool called the taxonomy-guided identification of biosynthetic gene clusters (TaxiBGC) that directly mine the metagenome was developed. To gain new insights into the microbial metabolism, we used TaxiBGC to predict BGCs from 373 metagenomes across 53 mammalian species representing seven orders. Our findings elucidate the functional activities of complex microbial communities in the gut.}, }
@article {pmid39161223, year = {2024}, author = {Stokholm, J and Thorsen, J and Schoos, AM and Rasmussen, MA and Brandt, S and Sørensen, SJ and Vahman, N and Chawes, B and Bønnelykke, K}, title = {Infantile colic is associated with development of later constipation and atopic disorders.}, journal = {Allergy}, volume = {79}, number = {12}, pages = {3360-3372}, pmid = {39161223}, issn = {1398-9995}, support = {//Region Hovedstaden/ ; //Strategiske Forskningsr&#xe5;d/ ; //Lundbeck Foundation/ ; //Sundhed og Sygdom, Det Frie Forskningsr&#xe5;d/ ; }, mesh = {Humans ; *Constipation/epidemiology/etiology ; *Colic/epidemiology/etiology ; *Gastrointestinal Microbiome ; Male ; Female ; Infant ; Child, Preschool ; Dermatitis, Atopic/epidemiology/complications ; Child ; Prospective Studies ; Asthma/epidemiology/diagnosis/microbiology/etiology ; Hypersensitivity, Immediate/epidemiology/complications ; Risk Factors ; }, abstract = {BACKGROUND: Infantile colic is a common condition with limited knowledge about later clinical manifestations. We evaluated the role of the early life gut microbiome in infantile colic and later development of atopic and gastrointestinal disorders.<br><br>METHODS: Copenhagen Prospective Studies on Asthma in Childhood2010 cohort was followed with 6&#x2009;years of extensive clinical phenotyping. The 1-month gut microbiome was analyzed by 16S rRNA sequencing. Infantile colic was evaluated at age 3&#x2009;months by interviews. Clinical endpoints included constipation to age 3&#x2009;years and prospectively diagnosed asthma and atopic dermatitis in the first 6&#x2009;years of life, and allergic sensitization from skin prick tests, specific Immunoglobulin E, and component analyses.<br><br>RESULTS: Of 695 children, 55 children (7.9%) had infantile colic. Several factors were associated with colic including race, breastfeeding, and pets. The 1-month gut microbiome composition and taxa abundances were not associated with colic, however a sparse Partial Least Squares model including combined abundances of nine species was moderately predictive of colic: median, cross-validated AUC&#x2009;=&#x2009;0.627, p&#x2009;=&#x2009;.003. Children with infantile colic had an increased risk of developing constipation (aOR, 2.88 [1.51-5.35], p&#x2009;=&#x2009;.001) later in life, but also asthma (aHR, 1.69 [1.02-2.79], p&#x2009;=&#x2009;.040), atopic dermatitis (aHR, 1.84 [1.20-2.81], p&#x2009;=&#x2009;.005) and had a higher number of positive allergic components (adjusted difference, 116% [14%-280%], p&#x2009;=&#x2009;.012) in the first 6&#x2009;years. These associations were not mediated by gut microbiome differences.<br><br>CONCLUSIONS: We link infantile colic with risk of developing constipation and atopic disorders in the first 6&#x2009;years of life, which was not mediated through an altered gut microbiome at age 1-month. These results suggest infantile colic to involve gastrointestinal and/or atopic mechanisms.}, }
@article {pmid39160620, year = {2024}, author = {Yu, T and Luo, Y and Tan, X and Zhao, D and Bi, X and Li, C and Zheng, Y and Xiang, H and Hu, S}, title = {Global Marine Cold Seep Metagenomes Reveal Diversity of Taxonomy, Metabolic Function, and Natural Products.}, journal = {Genomics, proteomics &amp; bioinformatics}, volume = {22}, number = {2}, pages = {}, pmid = {39160620}, issn = {2210-3244}, support = {//Center for Ocean Mega-Science, Chinese Academy of Sciences/ ; 2021QZKK0100//Second Tibetan Plateau Scientific Expedition and Research Program/ ; }, mesh = {*Metagenome/genetics ; *Archaea/genetics/metabolism/classification ; *Microbiota/genetics ; Bacteria/genetics/classification/metabolism ; Biological Products/metabolism ; Cold Temperature ; Phylogeny ; Seawater/microbiology ; Metagenomics/methods ; Biodiversity ; }, abstract = {Cold seeps in the deep sea are closely linked to energy exploration as well as global climate change. The alkane-dominated chemical energy-driven model makes cold seeps an oasis of deep-sea life, showcasing an unparalleled reservoir of microbial genetic diversity. Here, by analyzing 113 metagenomes collected from 14 global sites across 5 cold seep types, we present a comprehensive Cold Seep Microbiomic Database (CSMD) to archive the genomic and functional diversity of cold seep microbiomes. The CSMD includes over 49 million non-redundant genes and 3175 metagenome-assembled genomes, which represent 1895 species spanning 105 phyla. In addition, beta diversity analysis indicates that both the sampling site and cold seep type have a substantial impact on the prokaryotic microbiome community composition. Heterotrophic and anaerobic metabolisms are prevalent in microbial communities, accompanied by considerable mixotrophs and facultative anaerobes, highlighting the versatile metabolic potential in cold seeps. Furthermore, secondary metabolic gene cluster analysis indicates that at least 98.81% of the sequences potentially encode novel natural products, with ribosomally synthesized and post-translationally modified peptides being the predominant type widely distributed in archaea and bacteria. Overall, the CSMD represents a valuable resource that would enhance the understanding and utilization of global cold seep microbiomes.}, }
@article {pmid39160615, year = {2024}, author = {Hugerth, LW and Krog, MC and Vomstein, K and Du, J and Bashir, Z and Kaldhusdal, V and Fransson, E and Engstrand, L and Nielsen, HS and Schuppe-Koistinen, I}, title = {Defining Vaginal Community Dynamics: daily microbiome transitions, the role of menstruation, bacteriophages, and bacterial genes.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {153}, pmid = {39160615}, issn = {2049-2618}, support = {KAW 2020.0239//Science for Life Laboratory/ ; E-22614-01, E-22614-02//Rigshospitalet/ ; 2021-01683//Vetenskapsr&#xe5;det/ ; }, mesh = {Humans ; Female ; *Vagina/microbiology ; *Bacteriophages/genetics/physiology ; *Microbiota/genetics ; *Menstruation ; *Bacteria/classification/genetics ; Adult ; *Dysbiosis/microbiology ; *Menstrual Cycle ; Young Adult ; Genes, Bacterial/genetics ; Metagenomics/methods ; }, abstract = {BACKGROUND: The composition of the vaginal microbiota during the menstrual cycle is dynamic, with some women remaining eu- or dysbiotic and others transitioning between these states. What defines these dynamics, and whether these differences are microbiome-intrinsic or mostly driven by the host is unknown. To address this, we characterized 49 healthy, young women by metagenomic sequencing of daily vaginal swabs during a menstrual cycle. We classified the dynamics of the vaginal microbiome and assessed the impact of host behavior as well as microbiome differences at the species, strain, gene, and phage levels.<br><br>RESULTS: Based on the daily shifts in community state types (CSTs) during a menstrual cycle, the vaginal microbiome was classified into four Vaginal Community Dynamics (VCDs) and reported in a classification tool, named VALODY: constant eubiotic, constant dysbiotic, menses-related, and unstable dysbiotic. The abundance of bacteria, phages, and bacterial gene content was compared between the four VCDs. Women with different VCDs showed significant differences in relative phage abundance and bacterial composition even when assigned to the same CST. Women with unstable VCDs had higher phage counts and were more likely dominated by L. iners. Their Gardnerella spp. strains were also more likely to harbor bacteriocin-coding genes.<br><br>CONCLUSIONS: The VCDs present a novel time series classification that highlights the complexity of varying degrees of vaginal dysbiosis. Knowing the differences in phage gene abundances and the genomic strains present allows a deeper understanding of the initiation and maintenance of permanent dysbiosis. Applying the VCDs to further characterize the different types of microbiome dynamics qualifies the investigation of disease and enables comparisons at individual and population levels. Based on our data, to be able to classify a dysbiotic sample into the accurate VCD, clinicians would need two to three mid-cycle samples and two samples during menses. In the future, it will be important to address whether transient VCDs pose a similar risk profile to persistent dysbiosis with similar clinical outcomes. This framework may aid interdisciplinary translational teams in deciphering the role of the vaginal microbiome in women's health and reproduction. Video Abstract.}, }
@article {pmid39160043, year = {2024}, author = {Merino, N and Pagán, E and Berdejo, D and Worby, CJ and Young, M and Manson, AL and Pagán, R and Earl, AM and García-Gonzalo, D}, title = {Dynamics of microbiome and resistome in a poultry burger processing line.}, journal = {Food research international (Ottawa, Ont.)}, volume = {193}, number = {}, pages = {114842}, doi = {10.1016/j.foodres.2024.114842}, pmid = {39160043}, issn = {1873-7145}, mesh = {Animals ; *Microbiota/genetics ; *Food Microbiology ; *Bacteria/genetics/classification/isolation &amp; purification/drug effects ; *Food Handling/methods ; Poultry/microbiology ; Metagenomics/methods ; High-Throughput Nucleotide Sequencing ; Drug Resistance, Bacterial/genetics ; Meat/microbiology ; Poultry Products/microbiology ; }, abstract = {Traditionally, surveillance programs for food products and food processing environments have focused on targeted pathogens and resistance genes. Recent advances in high throughput sequencing allow for more comprehensive and untargeted monitoring. This study assessed the microbiome and resistome in a poultry burger processing line using culturing techniques and whole metagenomic sequencing (WMS). Samples included meat, burgers, and expired burgers, and different work surfaces. Microbiome analysis revealed spoilage microorganisms as the main microbiota, with substantial shifts observed during the shelf-life period. Core microbiota of meat and burgers included Pseudomonas spp., Psychrobacter spp., Shewanella spp. and Brochothrix spp., while expired burgers were dominated by Latilactobacillus spp. and Leuconostoc spp. Cleaning and disinfection (C&amp;D) procedures altered the microbial composition of work surfaces, which still harbored Hafnia spp. and Acinetobacter spp. after C&amp;D. Resistome analysis showed a low overall abundance of resistance genes, suggesting that effective interventions during processing may mitigate their transmission. However, biocide resistance genes were frequently found, indicating potential biofilm formation or inefficient C&amp;D protocols. This study demonstrates the utility of combining culturing techniques and WMS for comprehensive of the microbiome and resistome characterization in food processing lines.}, }
@article {pmid39159777, year = {2024}, author = {Fang, XM and Li, J and Wang, NF and Zhang, T and Yu, LY}, title = {Metagenomics uncovers microbiome and resistome in soil and reindeer faeces from Ny-Ålesund (Svalbard, High Arctic).}, journal = {Environmental research}, volume = {262}, number = {Pt 1}, pages = {119788}, doi = {10.1016/j.envres.2024.119788}, pmid = {39159777}, issn = {1096-0953}, mesh = {Animals ; *Feces/microbiology ; *Reindeer/microbiology ; *Microbiota/drug effects/genetics ; *Soil Microbiology ; Svalbard ; *Metagenomics ; Drug Resistance, Microbial/genetics ; Bacteria/genetics/drug effects/classification ; Drug Resistance, Bacterial/genetics ; Anti-Bacterial Agents/pharmacology ; Arctic Regions ; Soil/chemistry ; Genes, Bacterial ; }, abstract = {Research on the microbiome and resistome in polar environments, such as the Arctic, is crucial for understanding the emergence and spread of antibiotic resistance genes (ARGs) in the environment. In this study, soil and reindeer faeces samples collected from Ny-Ålesund (Svalbard, High Arctic) were examined to analyze the microbiome, ARGs, and biocide/metal resistance genes (BMRGs). The dominant phyla in both soil and faeces were Pseudomonadota, Actinomycetota, and Bacteroidota. A total of 2618 predicted Open Reading Frames (ORFs) containing antibiotic resistance genes (ARGs) were detected. These ARGs belong to 162 different genes across 17 antibiotic classes, with rifamycin and multidrug resistance genes being the most prevalent. We focused on investigating antibiotic resistance mechanisms in the Ny-Ålesund environment by analyzing the resistance genes and their biological pathways. Procrustes analysis demonstrated a significant correlation between bacterial communities and ARG/BMRG profiles in soil and faeces samples. Correlation analysis revealed that Pseudomonadota contributed most to multidrug and triclosan resistance, while Actinomycetota were predominant contributors to rifamycin and aminoglycoside resistance. The geochemical factors, SiO4[2-] and NH4[+], were found to significantly influence the microbial composition and ARG distribution in the soil samples. Analysis of ARGs, BMRGs, virulence factors (VFs), and pathogens identified potential health risks associated with certain bacteria, such as Cryobacterium and Pseudomonas, due to the presence of different genetic elements. This study provided valuable insights into the molecular mechanisms and geochemical factors contributing to antibiotic resistance and enhanced our understanding of the evolution of antibiotic resistance genes in the environment.}, }
@article {pmid39159729, year = {2024}, author = {Ma, J and Li, M and Bao, Y and Huang, W and He, X and Hong, Y and Wei, W and Liu, Z and Gao, X and Yang, Y and Cui, Z and Wang, W and Wang, J and Zhu, W and Zheng, N and Pan, L and Wang, D and Ke, Z and Zhou, B and Sheng, L and Li, H}, title = {Gut microbiota-brain bile acid axis orchestrates aging-related neuroinflammation and behavior impairment in mice.}, journal = {Pharmacological research}, volume = {208}, number = {}, pages = {107361}, doi = {10.1016/j.phrs.2024.107361}, pmid = {39159729}, issn = {1096-1186}, mesh = {Animals ; *Gastrointestinal Microbiome ; *Aging/metabolism ; Male ; *Bile Acids and Salts/metabolism ; *Neuroinflammatory Diseases/metabolism ; Female ; *Brain-Gut Axis/physiology ; *Mice, Inbred C57BL ; Mice ; *Brain/metabolism ; *Behavior, Animal ; Caenorhabditis elegans/microbiology ; Microglia/metabolism ; }, abstract = {Emerging evidence shows that disrupted gut microbiota-bile acid (BA) axis is critically involved in the development of neurodegenerative diseases. However, the alterations in spatial distribution of BAs among different brain regions that command important functions during aging and their exact roles in aging-related neurodegenerative diseases are poorly understood. Here, we analyzed the BA profiles in cerebral cortex, hippocampus, and hypothalamus of young and natural aging mice of both sexes. The results showed that aging altered brain BA profiles sex- and region- dependently, in which TβMCA was consistently elevated in aging mice of both sexes, particularly in the hippocampus and hypothalamus. Furthermore, we found that aging accumulated-TβMCA stimulated microglia inflammation in vitro and shortened the lifespan of C. elegans, as well as behavioral impairment and neuroinflammation in mice. In addition, metagenomic analysis suggested that the accumulation of brain TβMCA during aging was partially attributed to reduction in BSH-carrying bacteria. Finally, rejuvenation of gut microbiota by co-housing aged mice with young mice restored brain BA homeostasis and improved neurological dysfunctions in natural aging mice. In conclusion, our current study highlighted the potential of improving aging-related neuro-impairment by targeting gut microbiota-brain BA axis.}, }
@article {pmid39159726, year = {2024}, author = {Zhang, Y and Wang, N and Wan, J and Jousset, A and Jiang, G and Wang, X and Wei, Z and Xu, Y and Shen, Q}, title = {Exploring the antibiotic resistance genes removal dynamics in chicken manure by composting.}, journal = {Bioresource technology}, volume = {410}, number = {}, pages = {131309}, doi = {10.1016/j.biortech.2024.131309}, pmid = {39159726}, issn = {1873-2976}, mesh = {Animals ; *Manure/microbiology ; *Chickens ; *Composting ; *Drug Resistance, Microbial/genetics ; Anti-Bacterial Agents/pharmacology ; Genes, Bacterial ; Bacteria/genetics/drug effects ; Microbiota/drug effects ; Gene Transfer, Horizontal ; }, abstract = {Prolonged antibiotic usage in livestock farming leads to the accumulation of antibiotic resistance genes in animal manure. Composting has been shown as an effective way of removing antibiotic resistance from manures, but the specific mechanisms remain unclear. This study used time-series sampling and metagenomics to analyse the resistome types and their bacterial hosts in chicken manures. Composting significantly altered the physicochemical properties and microbiome composition, reduced antibiotic resistance genes by 65.71 %, mobile genetic elements by 68.15 % and horizontal gene transfer frequency. Source tracking revealed that Firmicutes, Actinobacteria, and Proteobacteria are the major bacterial hosts involved in the resistome and gene transfer events. Composting reduces the resistome risk by targeting pathogens such as Staphylococcus aureus. Structural equation modelling confirmed that composting reduces resistome risk by changing pH and pathogen abundance. This study demonstrates that composting is an effective strategy for mitigating resistome risk in chicken manure, thereby supporting the One Health initiative.}, }
@article {pmid39159427, year = {2024}, author = {Yagi, K and Ethridge, AD and Falkowski, NR and Huang, YJ and Elesela, S and Huffnagle, GB and Lukacs, NW and Fonseca, W and Asai, N}, title = {Microbiome modifications by steroids during viral exacerbation of asthma and in healthy mice.}, journal = {American journal of physiology. Lung cellular and molecular physiology}, volume = {327}, number = {5}, pages = {L646-L660}, pmid = {39159427}, issn = {1522-1504}, support = {R01 AI138348/AI/NIAID NIH HHS/United States ; AI089473//HHS | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; HL150682//HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)/ ; AI138348//HHS | NIH | National Institute of Allergy and Infectious Diseases (NIAID)/ ; }, mesh = {Animals ; *Asthma/virology/microbiology/drug therapy ; *Respiratory Syncytial Virus Infections/virology/drug therapy/microbiology/immunology ; *Fluticasone/pharmacology ; Mice ; *Gastrointestinal Microbiome/drug effects ; Lung/virology/microbiology/metabolism/drug effects ; Female ; Mice, Inbred BALB C ; Microbiota/drug effects ; Respiratory Syncytial Viruses/drug effects ; }, abstract = {In the present studies, the assessment of how viral exacerbation of asthmatic responses with and without pulmonary steroid treatment alters the microbiome in conjunction with immune responses presents striking data. The overall findings identify that although steroid treatment of allergic animals diminished the severity of the respiratory syncytial virus (RSV)-induced exacerbation of airway function and mucus hypersecretion, there were local increases in IL-17 expression. Analysis of the lung and gut microbiome suggested that there are differences in RSV exacerbation that are further altered by fluticasone (FLUT) treatment. Using metagenomic inference software, PICRUSt2, we were able to predict that the metabolite profile produced by the changed gut microbiome was significantly different with multiple metabolic pathways and associated with specific treatments with or without FLUT. Importantly, measuring plasma metabolites in an unbiased manner, our data indicate that there are significant changes associated with chronic allergen exposure, RSV exacerbation, and FLUT treatment that are reflective of responses to the disease and treatment. In addition, the changes in metabolites appeared to have contributions from both host and microbial pathways. To understand if airway steroids on their own altered lung and gut microbiome along with host responses to RSV infection, naïve animals were treated with lung FLUT before RSV infection. The naïve animals treated with FLUT before RSV infection demonstrated enhanced disease that corresponded to an altered microbiome and the related PICRUSt2 metagenomic inference analysis. Altogether, these findings set the foundation for identifying important correlations of severe viral exacerbated allergic disease with microbiome changes and the relationship of host metabolome with a potential for early life pulmonary steroid influence on subsequent viral-induced disease.NEW &amp; NOTEWORTHY These studies outline a novel finding that airway treatment with fluticasone, a commonly used inhaled steroid, has significant effects on not only the local lung environment but also on the mucosal microbiome, which may have significant disease implications. The findings further provide data to support that pulmonary viral exacerbations of asthma with or without steroid treatment alter the lung and gut microbiome, which have an impact on the circulating metabolome that likely alters the trajectory of disease progression.}, }
@article {pmid39158287, year = {2024}, author = {Lui, LM and Nielsen, TN}, title = {Decomposing a San Francisco estuary microbiome using long-read metagenomics reveals species- and strain-level dominance from picoeukaryotes to viruses.}, journal = {mSystems}, volume = {9}, number = {9}, pages = {e0024224}, pmid = {39158287}, issn = {2379-5077}, support = {DE-AC02-05CH11231//U.S. Department of Energy (DOE)/ ; }, mesh = {*Microbiota/genetics ; *Metagenomics/methods ; *Estuaries ; San Francisco ; *Viruses/genetics/classification/isolation &amp; purification ; Metagenome/genetics ; Bacteria/genetics/classification ; Archaea/genetics/virology ; Eukaryota/genetics ; Genome, Viral/genetics ; }, abstract = {UNLABELLED: Although long-read sequencing has enabled obtaining high-quality and complete genomes from metagenomes, many challenges still remain to completely decompose a metagenome into its constituent prokaryotic and viral genomes. This study focuses on decomposing an estuarine metagenome to obtain a more accurate estimate of microbial diversity. To achieve this, we developed a new bead-based DNA extraction method, a novel bin refinement method, and obtained 150 Gbp of Nanopore sequencing. We estimate that there are ~500 bacterial and archaeal species in our sample and obtained 68 high-quality bins (>90% complete, <5% contamination, ≤5 contigs, contig length of >100 kbp, and all ribosomal and tRNA genes). We also obtained many contigs of picoeukaryotes, environmental DNA of larger eukaryotes such as mammals, and complete mitochondrial and chloroplast genomes and detected ~40,000 viral populations. Our analysis indicates that there are only a few strains that comprise most of the species abundances.<br><br>IMPORTANCE: Ocean and estuarine microbiomes play critical roles in global element cycling and ecosystem function. Despite the importance of these microbial communities, many species still have not been cultured in the lab. Environmental sequencing is the primary way the function and population dynamics of these communities can be studied. Long-read sequencing provides an avenue to overcome limitations of short-read technologies to obtain complete microbial genomes but comes with its own technical challenges, such as needed sequencing depth and obtaining high-quality DNA. We present here new sampling and bioinformatics methods to attempt decomposing an estuarine microbiome into its constituent genomes. Our results suggest there are only a few strains that comprise most of the species abundances from viruses to picoeukaryotes, and to fully decompose a metagenome of this diversity requires 1 Tbp of long-read sequencing. We anticipate that as long-read sequencing technologies continue to improve, less sequencing will be needed.}, }
@article {pmid39158107, year = {2024}, author = {Ming, Y and Abdullah Al, M and Zhang, D and Zhu, W and Liu, H and Cai, L and Yu, X and Wu, K and Niu, M and Zeng, Q and He, Z and Yan, Q}, title = {Insights into the evolutionary and ecological adaption strategies of nirS- and nirK-type denitrifying communities.}, journal = {Molecular ecology}, volume = {33}, number = {18}, pages = {e17507}, doi = {10.1111/mec.17507}, pmid = {39158107}, issn = {1365-294X}, support = {SML2020SP004//Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; SML2023SP237//Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; SML2021SP203//Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; SML2023SP205//Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)/ ; 42377111//National Natural Science Foundation of China/ ; //Ocean Negative Carbon Emissions (ONCE) Program/ ; }, mesh = {*Denitrification/genetics ; *Nitrite Reductases/genetics ; China ; *Phylogeny ; *Metagenome/genetics ; Lakes/microbiology ; Bioreactors/microbiology ; Gene Transfer, Horizontal ; Microbiota/genetics ; Metagenomics ; Geologic Sediments/microbiology ; Bacteria/genetics/classification/metabolism ; Nitrogen/metabolism ; Adaptation, Physiological/genetics ; }, abstract = {Denitrification is a crucial process in the global nitrogen cycle, in which two functionally equivalent genes, nirS and nirK, catalyse the critical reaction and are usually used as marker genes. The nirK gene can function independently, whereas nirS requires additional genes to encode nitrite reductase and is more sensitive to environmental factors than nirK. However, the ecological differentiation mechanisms of those denitrifying microbial communities and their adaptation strategies to environmental stresses remain unclear. Here, we conducted metagenomic analysis for sediments and bioreactor samples from Lake Donghu, China. We found that nirS-type denitrifying communities had a significantly lower horizontal gene transfer frequency than that of nirK-type denitrifying communities, and nirS gene phylogeny was more congruent with taxonomy than that of nirK gene. Metabolic reconstruction of metagenome-assembled genomes further revealed that nirS-type denitrifying communities have robust metabolic systems for energy conservation, enabling them to survive under environmental stresses. Nevertheless, nirK-type denitrifying communities seemed to adapt to oxygen-limited environments with the ability to utilize various carbon and nitrogen compounds. Thus, this study provides novel insights into the ecological differentiation mechanism of nirS and nirK-type denitrifying communities, as well as the regulation of the global nitrogen cycle and greenhouse gas emissions.}, }
@article {pmid39157177, year = {2024}, author = {Huang, SS and Qiu, JY and Li, SP and Ma, YQ and He, J and Han, LN and Jiao, LL and Xu, C and Mao, YM and Zhang, YM}, title = {Microbial signatures predictive of short-term prognosis in severe pneumonia.}, journal = {Frontiers in cellular and infection microbiology}, volume = {14}, number = {}, pages = {1397717}, pmid = {39157177}, issn = {2235-2988}, mesh = {Humans ; Male ; Female ; Prognosis ; Retrospective Studies ; Middle Aged ; Aged ; *Bronchoalveolar Lavage Fluid/microbiology ; *Microbiota ; Pneumonia/microbiology/mortality ; Bacteria/classification/genetics/isolation &amp; purification ; High-Throughput Nucleotide Sequencing ; Lung/microbiology/pathology ; Metagenomics ; Machine Learning ; }, abstract = {OBJECTIVE: This retrospective cohort study aimed to investigate the composition and diversity of lung microbiota in patients with severe pneumonia and explore its association with short-term prognosis.<br><br>METHODS: A total of 301 patients diagnosed with severe pneumonia underwent bronchoalveolar lavage fluid metagenomic next-generation sequencing (mNGS) testing from February 2022 to January 2024. After applying exclusion criteria, 236 patients were included in the study. Baseline demographic and clinical characteristics were compared between survival and non-survival groups. Microbial composition and diversity were analyzed using alpha and beta diversity metrics. Additionally, LEfSe analysis and machine learning methods were employed to identify key pathogenic microorganism associated with short-term mortality. Microbial interaction modes were assessed through network co-occurrence analysis.<br><br>RESULTS: The overall 28-day mortality rate was 37.7% in severe pneumonia. Non-survival patients had a higher prevalence of hypertension and exhibited higher APACHE II and SOFA scores, higher procalcitonin (PCT), and shorter hospitalization duration. Microbial &#x3b1; and &#x3b2; diversity analysis showed no significant differences between the two groups. However, distinct species diversity patterns were observed, with the non-survival group showing a higher abundance of Acinetobacter baumannii, Klebsiella pneumoniae, and Enterococcus faecium, while the survival group had a higher prevalence of Corynebacterium striatum and Enterobacter. LEfSe analysis identified 29 distinct terms, with 10 potential markers in the non-survival group, including Pseudomonas sp. and Enterococcus durans. Machine learning models selected 16 key pathogenic bacteria, such as Klebsiella pneumoniae, significantly contributing to predicting short-term mortality. Network co-occurrence analysis revealed greater complexity in the non-survival group compared to the survival group, with differences in central genera.<br><br>CONCLUSION: Our study highlights the potential significance of lung microbiota composition in predicting short-term prognosis in severe pneumonia patients. Differences in microbial diversity and composition, along with distinct microbial interaction modes, may contribute to variations in short-term outcomes. Further research is warranted to elucidate the clinical implications and underlying mechanisms of these findings.}, }
@article {pmid39154602, year = {2024}, author = {García-Roldán, A and de la Haba, RR and Sánchez-Porro, C and Ventosa, A}, title = {'Altruistic' cooperation among the prokaryotic community of Atlantic salterns assessed by metagenomics.}, journal = {Microbiological research}, volume = {288}, number = {}, pages = {127869}, doi = {10.1016/j.micres.2024.127869}, pmid = {39154602}, issn = {1618-0623}, mesh = {*Metagenomics ; *Bacteria/genetics/classification ; *Salinity ; *Archaea/genetics/classification ; Spain ; Seawater/microbiology ; Phylogeny ; Atlantic Ocean ; Biodiversity ; Salts ; Microbiota/genetics ; Ecosystem ; Metagenome ; }, abstract = {Hypersaline environments are extreme habitats with a limited prokaryotic diversity, mainly restricted to halophilic or halotolerant archaeal and bacterial taxa adapted to highly saline conditions. This study attempts to analyze the taxonomic and functional diversity of the prokaryotes that inhabit a solar saltern located at the Atlantic Coast, in Isla Cristina (Huelva, Southwest Spain), and the influence of salinity on the diversity and metabolic potential of these prokaryotic communities, as well as the interactions and cooperation among the individuals within that community. Brine samples were obtained from different saltern ponds, with a salinity range between 19.5 % and 39 % (w/v). Total prokaryotic DNA was sequenced using the Illumina shotgun metagenomic strategy and the raw sequence data were analyzed using supercomputing services following the MetaWRAP and SqueezeMeta protocols. The most abundant phyla at moderate salinities (19.5-22 % [w/v]) were Methanobacteriota (formerly "Euryarchaeota"), Pseudomonadota and Bacteroidota, followed by Balneolota and Actinomycetota and Uroviricota in smaller proportions, while at high salinities (36-39 % [w/v]) the most abundant phylum was Methanobacteriota, followed by Bacteroidota. The most abundant genera at intermediate salinities were Halorubrum and the bacterial genus Spiribacter, while the haloarchaeal genera Halorubrum, Halonotius, and Haloquadratum were the main representatives at high salinities. A total of 65 MAGs were reconstructed from the metagenomic datasets and different functions and pathways were identified in them, allowing to find key taxa in the prokaryotic community able to synthesize and supply essential compounds, such as biotin, and precursors of other bioactive molecules, like β-carotene, and bacterioruberin, to other dwellers in this habitat, lacking the required enzymatic machinery to produce them. This work shed light on the ecology of aquatic hypersaline environments, such as the Atlantic Coast salterns, and on the dynamics and factors affecting the microbial populations under such extreme conditions.}, }
@article {pmid39154578, year = {2024}, author = {Liang, T and Liu, Y and Guo, N and Li, Y and Niu, L and Liu, J and Ma, Q and Zhang, J and Shan, M}, title = {Jinhong decoction ameliorates injury in septic mice without disrupting the equilibrium of gut microbiota.}, journal = {Journal of pharmaceutical and biomedical analysis}, volume = {251}, number = {}, pages = {116404}, doi = {10.1016/j.jpba.2024.116404}, pmid = {39154578}, issn = {1873-264X}, mesh = {Animals ; *Gastrointestinal Microbiome/drug effects ; *Sepsis/drug therapy/microbiology ; *Drugs, Chinese Herbal/pharmacology ; Mice ; Male ; *Disease Models, Animal ; Anti-Bacterial Agents/pharmacology ; Chromatography, High Pressure Liquid/methods ; Cecum/microbiology ; Mice, Inbred C57BL ; }, abstract = {Sepsis is a life-threatening condition and usually be treated with antibiotics, which however often has severe side effects. This work proposed a novel Chinese traditional medicine JINHONG (JH) decoction for therapy of sepsis. We first identified the chemical constituents of JH decoction by using high-performance liquid chromatography and mass spectrometry (HPLC-MS). Then, we constructed a model mouse for sepsis by using cecal ligation and puncture (CLP). Metagenomic sequencing method was used to compare the diversity and abundance of the gut microbiota between normal, disease model, JH decoction-treatment and antibiotic-treatment mice. Many indices including the number of platelets, CD62p and CD63 content, AQP2 and AQP8 level, as well as the expression level of protein C confirmed that the sepsis resulted in serious pathological damage, while all of these indices could be reversed by JH decoction and antibiotics. The diversity and abundance of intestinal flora decreased in CLP mice, and the decrements aggravated after antibiotic treatment while can be recovered by JH decoction treatment. The abundance of anti-inflammatory Ruminococcaceae increased after JH decoction treatment, indicating that JH decoction could ameliorate pathology associated with sepsis in CLP model via modulating the intestinal flora. This study demonstrates that JH decoction could treat sepsis clinically without obvious adverse effects on gut microbiota.}, }
@article {pmid39154041, year = {2024}, author = {Ma, T and Zhuang, Y and Lu, W and Tu, Y and Diao, Q and Fan, X and Zhang, N}, title = {Seven hundred and ninety-seven metagenome-assembled genomes from the goat rumen during early life.}, journal = {Scientific data}, volume = {11}, number = {1}, pages = {897}, pmid = {39154041}, issn = {2052-4463}, mesh = {Animals ; Gastrointestinal Microbiome ; *Goats/microbiology ; *Metagenome ; *Rumen/microbiology ; }, abstract = {The rumen microbiome plays an important role in providing energy and protein to the host. Manipulation of rumen microbiome during early life may have a long-term beneficial effect on the health, growth performance, and feed efficiency of ruminants. To better understand the profiles and functional potentials of rumen microbiome in young ruminants, metagenomic binning was performed to investigate the rumen microbiome of goat kids from one to 84 days of age. A total of 797 metagenome-assembled genomes (MAGs) were recovered from the rumen of 42 Laiwu black goat kids. Our findings provide fundamental knowledge of the rumen microbiome during early life based on metagenomic binning, which may provide insights into effective strategies to achieve long-term beneficial effects on animal health and production.}, }
@article {pmid39153763, year = {2024}, author = {Cleminson, JS and Thomas, J and Stewart, CJ and Campbell, D and Gennery, A and Embleton, ND and Köglmeier, J and Wong, T and Spruce, M and Berrington, JE}, title = {Gut microbiota and intestinal rehabilitation: a prospective childhood cohort longitudinal study of short bowel syndrome (the MIRACLS study): study protocol.}, journal = {BMJ open gastroenterology}, volume = {11}, number = {1}, pages = {}, pmid = {39153763}, issn = {2054-4774}, mesh = {Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; *Feces/microbiology ; *Gastrointestinal Microbiome/physiology ; Intestines/microbiology ; Longitudinal Studies ; *Parenteral Nutrition/methods/statistics &amp; numerical data ; Prospective Studies ; *Quality of Life/psychology ; RNA, Ribosomal, 16S ; *Short Bowel Syndrome/microbiology/epidemiology ; Observational Studies as Topic ; }, abstract = {INTRODUCTION: Short bowel syndrome (SBS) is the predominant cause of paediatric intestinal failure. Although life-saving, parenteral nutrition (PN) is linked to complications and may impact quality of life (QoL). Most children will experience intestinal rehabilitation (IR), but the mechanisms underpinning this remain to be understood. SBS is characterised by abnormal microbiome patterns, which might serve as predictive indicators for IR. We aim to characterise the microbiome profiles of children with SBS during IR, concurrently exploring how parental perspectives of QoL relate to IR.<br><br>METHODS AND ANALYSIS: This study will enrol a minimum of 20 paediatric patients with SBS (0-18 years). Clinical data and biological samples will be collected over a 2-year study period. We will apply 16S rRNA gene sequencing to analyse the microbiome from faecal and gut tissue samples, with additional shotgun metagenomic sequencing specifically on samples obtained around the time of IR. Gas chromatography with flame ionisation detection will profile faecal short-chain fatty acids. Plasma citrulline and urinary intestinal fatty acid binding proteins will be measured annually. We will explore microbiome-clinical covariate interactions. Furthermore, we plan to assess parental perspectives on QoL during PN and post-IR by inviting parents to complete the Paediatric Quality of Life questionnaire at recruitment and after the completion of IR.<br><br>ETHICS AND DISSEMINATION: Ethical approval was obtained from the East Midlands-Nottingham 2 Research Ethics Committee (22/EM/0233; 28 November 2022). Recruitment began in February 2023. Outcomes of the study will be published in peer-reviewed scientific journals and presented at scientific meetings. A lay summary of the results will be made available to participants and the public.<br><br>TRIAL REGISTRATION NUMBER: ISRCTN90620576.}, }
@article {pmid39153624, year = {2024}, author = {Barquero, MB and García-Díaz, C and Dobbler, PT and Jehmlich, N and Moreno, JL and López-Mondéjar, R and Bastida, F}, title = {Contrasting fertilization and phenological stages shape microbial-mediated phosphorus cycling in a maize agroecosystem.}, journal = {The Science of the total environment}, volume = {951}, number = {}, pages = {175571}, doi = {10.1016/j.scitotenv.2024.175571}, pmid = {39153624}, issn = {1879-1026}, mesh = {*Zea mays ; *Phosphorus/metabolism ; *Fertilizers ; *Soil Microbiology ; Microbiota ; Bacteria/metabolism ; Agriculture/methods ; Archaea/physiology/metabolism ; Soil/chemistry ; }, abstract = {Phosphorus (P) is essential for plants but often limited in soils, with microbes playing a key role in its cycling. P deficiency in crops can be mitigated by applying by-products like sludge and struvite to enhance yield and sustainability. Here, we evaluated the contribution of four different types of fertilizers: i) conventional NPK; ii) sludge; iii) struvite; and iv) struvite+sludge in a semiarid maize plantation to the availability of P and the responses of the soil microbiome. We investigated the effects of these treatments on the relative abundance of bacterial and archaeal genes and proteins related to organic P mineralization, inorganic P solubilization, and the P starvation response regulation through a multi-omic approach. Moreover, we explored the impact of maize phenology by collecting samples at germination and flowering stages. Our findings suggest that the phenological stage has a notable impact on the abundance of P cycle genes within bacterial and archaeal communities, particularly regarding the solubilization of inorganic P. Furthermore, significant variations were observed in the relative abundance of genes associated with different P cycles in response to various fertilizer treatments. Sludge and struvite application improved P availability, which was related to an increase in the relative abundance of Sphingomonas (Proteobacteria) and Luteitalea (Acidobacteria) respectively, and genes related to inorganic P solubilization. Furthermore, we observed a substantial taxonomic clustering of functional processes associated with the P cycle. Among the dominant bacterial populations containing P-related genes, those microbes possessing genes linked to the solubilization of inorganic P typically did not harbor genes associated with the mineralization of organic P. This phenomenon was particularly evident among members of Actinobacteria. Overall, we reveal important shifts in bacterial and archaeal communities and associated molecular processes, stressing the intricate interplay between fertilization, phenology, and P cycling in agroecosystems.}, }
@article {pmid39153565, year = {2024}, author = {Yang, C and Yan, S and Zhang, B and Yao, X and Mo, J and Rehman, F and Guo, J}, title = {Spatiotemporal distribution of the planktonic microbiome and antibiotic resistance genes in a typical urban river contaminated by macrolide antibiotics.}, journal = {Environmental research}, volume = {262}, number = {Pt 1}, pages = {119808}, doi = {10.1016/j.envres.2024.119808}, pmid = {39153565}, issn = {1096-0953}, mesh = {*Rivers/microbiology/chemistry ; *Microbiota/drug effects ; *Macrolides/analysis ; *Anti-Bacterial Agents/pharmacology/analysis ; *Plankton/drug effects/genetics ; *Drug Resistance, Microbial/genetics ; *Water Pollutants, Chemical/analysis ; Environmental Monitoring ; Genes, Bacterial ; Bacteria/genetics/drug effects/classification ; }, abstract = {The widespread application of macrolide antibiotics has caused antibiotic resistance pollution, threatening the river ecological health. In this study, five macrolide antibiotics (azithromycin, clarithromycin, roxithromycin, erythromycin, and anhydro erythromycin A) were monitored in the Zao River across three hydrological periods (April, July, and December). Simultaneously, the changes in antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and planktonic bacterial communities were determined using metagenomic sequencing. A clear pollution gradient was observed for azithromycin and roxithromycin, with the concentrations in the dry season surpassing those in other seasons. The highest concentration was observed for azithromycin (1.36 μg/L). The abundance of MLS resistance genes increased along the Zao River during the dry season, whereas the opposite trend was obtained during the wet season. A significant correlation between the levels of MLS resistance genes and macrolide antibiotics was identified during the dry season. Notably, compared with the reference site, the abundance of transposase in the effluent from wastewater treatment plants (WWTPs) was significantly elevated in both dry and wet seasons, whereas the abundance of insertion sequences (IS) and plasmids declined during the dry season. The exposure to wastewater containing macrolide antibiotics altered the diversity of planktonic bacterial communities. The bacterial host for ARGs appeared to be Pseudomonas, primarily associated with multidrug subtypes. Moreover, the ARG subtypes were highly correlated with MGEs (transposase and istA). The partial least-squares path model (PLS-PM) demonstrated a positive correlation between the abundance of MGEs and ARGs, indicating the significance of horizontal gene transfer (HGT) in the dissemination of ARGs within the Zao River. Environmental variables, such as TN and NO3[-]-N, were significantly correlated with the abundance of MGEs, ARGs, and bacteria. Collectively, our findings could provide insights into the shift patterns of the microbiome and ARGs across the contamination gradient of AZI and ROX in the river.}, }
@article {pmid39152661, year = {2024}, author = {Leugger, F and Schmidlin, M and Lüthi, M and Kontarakis, Z and Pellissier, L}, title = {Scanning amplicons with CRISPR-Dx detects endangered amphibians in environmental DNA.}, journal = {Molecular ecology resources}, volume = {24}, number = {8}, pages = {e14009}, doi = {10.1111/1755-0998.14009}, pmid = {39152661}, issn = {1755-0998}, support = {//Swiss Federal Institute for Forest, Snow and Landscape Research/ ; 40B2-0_203550//Schweizerischer Nationalfonds zur F&#xf6;rderung der Wissenschaftlichen Forschung/ ; }, mesh = {Animals ; *Amphibians/genetics/classification ; *DNA, Environmental/genetics ; *Endangered Species ; Switzerland ; *Clustered Regularly Interspaced Short Palindromic Repeats/genetics ; DNA Barcoding, Taxonomic/methods ; Ponds ; Biodiversity ; Metagenomics/methods ; }, abstract = {More efficient methods for extensive biodiversity monitoring are required to support rapid measures to address the biodiversity crisis. While environmental DNA (eDNA) metabarcoding and quantitative PCR (qPCR) methods offer advantages over traditional monitoring approaches, their large-scale application is limited by the time and labour required for developing assays and/or for analysis. CRISPR (clustered regularly interspaced short palindromic repeats) diagnostic technologies (Dx) may overcome some of these limitations, but they have been used solely with species-specific primers, restricting their versatility for biodiversity monitoring. Here, we demonstrate the feasibility of designing species-specific CRISPR-Dx assays in silico within a short metabarcoding fragment using a general primer set, a methodology we term 'ampliscanning', for 18 of the 22 amphibian species in Switzerland. We sub-selected nine species, including three classified as regionally endangered, to test the methodology using eDNA sampled from ponds at nine sites. We compared the ampliscanning detections to data from traditional monitoring at these sites. Ampliscanning was successful at detecting target species with different prevalences across the landscape. With only one visit, we detected more species per site than three traditional monitoring visits (visual and acoustic detections by trained experts), in particular more elusive species and previously undocumented but expected populations. Ampliscanning detected 25 species/site combinations compared to 12 with traditional monitoring. Sensitivity analyses showed that larger numbers of field visits and PCR replicates are more important for reliable detection than many technical replicates at the CRISPR-Dx assay level. Given the reduced sampling and analysis effort, our results highlight the benefits of eDNA and CRISPR-Dx combined with universal primers for large-scale monitoring of multiple endangered species across landscapes to inform conservation measures.}, }
@article {pmid39152482, year = {2024}, author = {Luo, W and Zhao, M and Dwidar, M and Gao, Y and Xiang, L and Wu, X and Medema, MH and Xu, S and Li, X and Schäfer, H and Chen, M and Feng, R and Zhu, Y}, title = {Microbial assimilatory sulfate reduction-mediated H2S: an overlooked role in Crohn's disease development.}, journal = {Microbiome}, volume = {12}, number = {1}, pages = {152}, pmid = {39152482}, issn = {2049-2618}, support = {82370551//National Natural Science Foundation of China/ ; 82270579//National Natural Science Foundation of China/ ; 82100577//National Natural Science Foundation of China/ ; 2024GXNSFFA010009//Natural Science Foundation of Guangxi Zhuang Autonomous Region/ ; }, mesh = {*Crohn Disease/microbiology ; Humans ; *Gastrointestinal Microbiome ; *Hydrogen Sulfide/metabolism ; Animals ; Mice ; *Sulfates/metabolism ; Escherichia coli/genetics/metabolism ; Feces/microbiology ; Dysbiosis/microbiology ; Colon/microbiology ; Metagenomics ; Oxidation-Reduction ; Disease Models, Animal ; Female ; }, abstract = {BACKGROUND: H2S imbalances in the intestinal tract trigger Crohn's disease (CD), a chronic inflammatory gastrointestinal disorder characterized by microbiota dysbiosis and barrier dysfunction. However, a comprehensive understanding of H2S generation in the gut, and the contributions of both microbiota and host to systemic H2S levels in CD, remain to be elucidated. This investigation aimed to enhance comprehension regarding the sulfidogenic potential of both the human host and the gut microbiota.<br><br>RESULTS: Our analysis of a treatment-naive CD cohorts' fecal metagenomic and biopsy metatranscriptomic data revealed reduced expression of host endogenous H2S generation genes alongside increased abundance of microbial exogenous H2S production genes in correlation with CD. While prior studies focused on microbial H2S production via dissimilatory sulfite reductases, our metagenomic analysis suggests the assimilatory sulfate reduction (ASR) pathway is a more significant contributor in the human gut, given its high prevalence and abundance. Subsequently, we validated our hypothesis experimentally by generating ASR-deficient E. coli mutants &#x2206;cysJ and &#x2206;cysM through the deletion of sulfite reductase and L-cysteine synthase genes. This alteration significantly affected bacterial sulfidogenic capacity, colon epithelial cell viability, and colonic mucin sulfation, ultimately leading to colitis in murine model. Further study revealed that gut microbiota degrade sulfopolysaccharides and assimilate sulfate to produce H2S via the ASR pathway, highlighting the role of sulfopolysaccharides in colitis and cautioning against their use as food additives.<br><br>CONCLUSIONS: Our study significantly advances understanding of microbial sulfur metabolism in the human gut, elucidating the complex interplay between diet, gut microbiota, and host sulfur metabolism. We highlight the microbial ASR pathway as an overlooked endogenous H2S producer and a potential therapeutic target for managing CD. Video Abstract.}, }
@article {pmid39152146, year = {2024}, author = {Mizsei, E and Radovics, D and Rák, G and Budai, M and Bancsik, B and Szabolcs, M and Sos, T and Lengyel, S}, title = {Alpine viper in changing climate: thermal ecology and prospects of a cold-adapted reptile in the warming Mediterranean.}, journal = {Scientific reports}, volume = {14}, number = {1}, pages = {18988}, pmid = {39152146}, issn = {2045-2322}, support = {150510498//Mohamed bin Zayed Species Conservation Fund/ ; 15478-1//Rufford Foundation/ ; PD146621//Nemzeti Kutat&#xe1;si Fejleszt&#xe9;si &#xe9;s Innov&#xe1;ci&#xf3;s Hivatal/ ; K106133//Nemzeti Kutat&#xe1;si Fejleszt&#xe9;si &#xe9;s Innov&#xe1;ci&#xf3;s Hivatal/ ; K134391//Nemzeti Kutat&#xe1;si Fejleszt&#xe9;si &#xe9;s Innov&#xe1;ci&#xf3;s Hivatal,Hungary/ ; }, mesh = {Animals ; *Viperidae/physiology ; *Climate Change ; Male ; Female ; Ecosystem ; Body Temperature Regulation/physiology ; Greece ; Cold Temperature ; Adaptation, Physiological ; Mediterranean Region ; Acclimatization/physiology ; Phylogeny ; Body Temperature/physiology ; }, abstract = {In a rapidly changing thermal environment, reptiles are primarily dependent on in situ adaptation because of their limited ability to disperse and the restricted opportunity to shift their ranges. However, the rapid pace of climate change may surpass these adaptation capabilities or elevate energy expenditures. Therefore, understanding the variability in thermal traits at both individual and population scales is crucial, offering insights into reptiles' vulnerability to climate change. We studied the thermal ecology of the endangered Greek meadow viper (Vipera graeca), an endemic venomous snake of fragmented alpine-subalpine meadows above 1600 m of the Pindos mountain range in Greece and Albania, to assess its susceptibility to anticipated changes in the alpine thermal environment. We measured preferred body temperature in artificial thermal gradient, field body temperatures of 74 individuals in five populations encompassing the entire geographic range of the species, and collected data on the available of temperatures for thermoregulation. We found that the preferred body temperature (Tp) differed only between the northernmost and the southernmost populations and increased with female body size but did not depend on sex or the gravidity status of females. Tp increased with latitude but was unaffected by the phylogenetic position of the populations. We also found high accuracy of thermoregulation in V. graeca populations and variation in the thermal quality of habitats throughout the range. The overall effectiveness of thermoregulation was high, indicating that V. graeca successfully achieves its target temperatures and exploits the thermal landscape. Current climatic conditions limit the activity period by an estimated 1278 h per year, which is expected to increase considerably under future climate scenarios. Restricted time available for thermoregulation, foraging and reproduction will represent a serious threat to the fitness of individuals and the persistence of populations in addition to habitat loss due to mining, tourism or skiing and habitat degradation due to overgrazing in the shrinking mountaintop habitats of V. graeca.}, }
@article {pmid39151634, year = {2024}, author = {Xu, WJ and Meng, L and Zhao, YK and Wu, J and Liu, HM and Wang, JQ and Zheng, N}, title = {Characteristics of psychrophilic bacterial communities and associated metabolism pathways in different environments by a metagenomic analysis.}, journal = {The Science of the total environment}, volume = {953}, number = {}, pages = {175496}, doi = {10.1016/j.scitotenv.2024.175496}, pmid = {39151634}, issn = {1879-1026}, mesh = {China ; *Bacteria/classification/metabolism/genetics ; *Metagenomics ; *Milk/microbiology ; Animals ; Microbiota ; }, abstract = {Psychrophilic bacteria, the dominant spoilage organisms in raw milk, secrete heat-stable extracellular proteases and lipases that lead to the decomposition of milk and dairy products. In this study, we investigated psychrophilic bacteria in 165 raw milk samples collected across four seasons and six regions in China using shotgun metagenomic sequencing and traditional culture methods. The isolated psychrophilic bacteria were classified into 40 genera and 185 species. Pseudomonas was the most prevalent, accounting for 51.13 % of the genera, while Lactococcus and Chryseobacterium were also notably abundant (> 6.0 %). Metagenomic sequencing revealed that Pseudomonas (47.9 %), Stenotrophomonas (9.75 %), Sphingomonas (6.73 %), Latilactobacillus (6.38 %) and Lactococcus (5.16 %) were the dominant genera in the raw milk samples. The diversity of psychrophilic bacteria in raw milk was strongly influenced by seasonal variat